Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JP2010263512 The present invention aims to cover a wider frequency band and to use acoustic diaphragms of various materials and thicknesses, even in a so-called vibration type speaker device using an actuator. A vibration transmission member 2 is provided so as to be in contact with an acoustic diaphragm 1 by a predetermined length, and a vibration corresponding to a sound to be reproduced is applied to the vibration transmission member 2 by an actuator 3. Thereby, the vibration is efficiently transmitted to the acoustic diaphragm 1 through the vibration transmission member 2, and the transmission efficiency (propagation efficiency) of the vibration is improved and emitted as compared with the case where the acoustic diaphragm 1 is directly vibrated. Make it possible to cover a wider frequency band for voice. [Selected figure] Figure 1 Speaker device [0001] The present invention relates to, for example, a speaker device having an excitation type configuration in which vibration corresponding to an audio signal generated by an actuator such as a giant magnetostrictive actuator is transmitted to an acoustic diaphragm to generate sound. [0002] As a speaker device, not a usual speaker unit having a voice coil and a cone but an actuator such as a super magnetostrictive actuator that vibrates an acoustic diaphragm made of acrylic or the like to generate sound is considered and put to practical use . [0003] 04-05-2019 1 Specifically, in Patent Document 1, a cylindrical acoustic diaphragm is vertically supported, and a plurality of magnetostrictive actuators are disposed on the lower end side of the acoustic diaphragm, and drive rods of the respective magnetostrictive actuators are disposed under the acoustic diaphragm. A device is shown which abuts the end face and applies an axial vibration to the acoustic diaphragm. [0004] In this speaker device, first, by vibrating the end face of the cylindrical diaphragm, compression waves propagate instantaneously in the longitudinal direction of the cylinder. In the process of propagation of the compressional waves, a force is generated in the radial direction of the cylinder (direction orthogonal to the longitudinal direction of the cylinder) by the Poisson's ratio of the solid. This force causes radial vibration, resulting in the generation of sound waves from the entire cylindrical diaphragm. [0005] Here, the Poisson's ratio is the ratio of the expansion or contraction in the force direction and the contraction in the vertical direction, which is a direction perpendicular to the force direction, when the elastic body is stretched or compressed. Means [0006] Then, in the speaker device, a sound wave is emitted at a uniform level at any position in the axial direction of the acoustic diaphragm, and a uniform sound image is formed over the entire acoustic diaphragm in the height (length) direction. That is, a high quality reproduction sound field can be realized. [0007] 04-05-2019 2 JP, 2007-166027, A [0008] By the way, the vibration type speaker device disclosed in Patent Document 1 described above is basically configured to generate sound by vibrating one acoustic diaphragm by an actuator. [0009] For this reason, since the transfer characteristic of the compressional wave of the acoustic diaphragm is determined depending on the material, thickness and the like of the acoustic diaphragm, it is considered that the limit is determined to some extent when it is desired to widen the coverable frequency band. [0010] Further, in the case of the vibration type speaker device disclosed in Patent Document 1 described above, the compressional wave is not efficiently transmitted unless the acoustic diaphragm has a certain thickness. For this reason, if a thin acoustic diaphragm is used in the excitation type speaker device, the vibration can not be efficiently propagated (transmitted) throughout the acoustic diaphragm, and a good reproduction sound field can be obtained. It is thought that there are cases where it can not be formed. [0011] In view of the above, according to the present invention, even in the case of a so-called vibration type speaker device using an actuator, it is possible to cover a wider frequency band and to use acoustic diaphragms of various materials and thicknesses. Aim to be able to [0012] In order to solve the above-mentioned subject, the speaker device of the invention according to claim 1 is provided such that an acoustic diaphragm and the acoustic diaphragm are in contact with each other for a predetermined length, and the acoustic diaphragm is provided A vibration transmitting member for transmitting vibration, and an actuator for generating a sound by transmitting vibration to the acoustic diaphragm through the vibration transmitting member by 04-05-2019 3 applying the vibration corresponding to the sound signal to be reproduced to the vibration transmitting member; Equipped with [0013] According to the speaker device of the first aspect of the present invention, the vibration transmission member is provided to be in contact with the acoustic diaphragm for a predetermined length, and the vibration transmission member responds to the sound to be reproduced. Vibration is applied by the actuator. [0014] Thereby, the vibration can be efficiently transmitted to the acoustic diaphragm through the vibration transmission member, so that the transmission efficiency (propagation efficiency) of the vibration is improved and the frequency is wider than when the acoustic diaphragm is directly vibrated. It is made to be able to cover a zone. Further, by improving the transmission efficiency of the vibration to the acoustic diaphragm, it is possible to widen the selection range of the material, thickness and the like of the acoustic diaphragm. [0015] According to the present invention, in a so-called vibration type speaker device using an actuator, the transmission efficiency of vibration to the acoustic diaphragm can be improved, and a wider frequency band can be covered. Further, by improving the transmission efficiency of the vibration to the acoustic diaphragm, it is possible to widen the selection range of the material and thickness of the acoustic diaphragm. [0016] It is a figure for demonstrating the excitation type speaker apparatus to which one embodiment 04-05-2019 4 of this invention was applied. It is a figure for demonstrating the structural example of the actuator used in the speaker apparatus of this embodiment. It is a figure for demonstrating the sound emission time difference of the audio ¦ voice emitted from the speaker apparatus with which one embodiment of this invention was applied. It is a figure for demonstrating the sound emission time difference of the audio ¦ voice emitted from the excitation type speaker apparatus when not using a vibration transmission member. FIG. 6 is a view for explaining the contact length of the vibration transfer member 2 with the acoustic diaphragm 1; FIG. 6 is a view for explaining the contact length of the vibration transfer member 2 with the acoustic diaphragm 1; It is a figure for demonstrating the variation of the installation position in the case of providing the vibration transmission member 2 with respect to the acoustic diaphragm 1, and the method of installation. It is a figure for demonstrating the variation of the installation position in the case of providing the vibration transmission member 2 with respect to the acoustic diaphragm 1, and the method of installation. It is a figure for demonstrating the variation of the installation position in the case of providing the vibration transmission member 2 with respect to the acoustic diaphragm 1, and the method of installation. It is a figure for demonstrating the variation of the installation position in the case of providing the vibration transmission member 2 with respect to the acoustic diaphragm 1, and the method of installation. It is a figure for demonstrating the variation of the installation position in the case of providing the vibration transmission member 2 with respect to the acoustic diaphragm 1, and the method of installation. It is a figure for demonstrating the variation of the installation position in the case of providing the vibration transmission member 2 with respect to the acoustic diaphragm 1, and the method of installation. It is a figure for demonstrating the example at the time of forming an acoustic diaphragm in a cylindrical form. It is a figure for demonstrating the example of the speaker apparatus using two acoustic diaphragms 1a and 1b. It is a figure for demonstrating the vibration characteristic of magnesium and paper. It is a figure for demonstrating the other example of the speaker apparatus using two acoustic diaphragms 1a and 1b. It is a figure for demonstrating the example of the speaker apparatus using three acoustic diaphragms 1a, 1b, and 1c. It is a figure for demonstrating the other example of the speaker apparatus using three acoustic diaphragms 1a, 1b, and 1c. An application example of a speaker device according to an embodiment of the present invention will be described. 04-05-2019 5 [0017] Hereinafter, an embodiment of a speaker device according to the present invention will be described with reference to the drawings. [0018] [Basic Configuration of Vibrating Speaker Device Described in Embodiment] FIG. 1 is a diagram for explaining a vibrating speaker device to which an embodiment of the present invention is applied. [0019] As shown in FIG. 1, the speaker device of this embodiment comprises an acoustic diaphragm 1, vibration transmitting members 2 provided on the left and right sides of the acoustic diaphragm 1, and an actuator 3, respectively. There is. [0020] The acoustic diaphragm 1 is formed of, for example, an acrylic plate, and in this embodiment, the acoustic diaphragm 1 has a thickness of, for example, 2 to 3 mm and a length of about 30 cm × 40 cm. Of course, this is only an example, and the thickness and size of the acoustic diaphragm 1 can be various. In addition to the acrylic plate, the acoustic diaphragm 1 can also be formed of, for example, various other materials such as organic glass. [0021] The vibration transmitting member 2 is formed of, for example, carbon fiber (carbon fiber or carbon nanofiber), and in this embodiment, it is formed in a rod shape (linear shape) having a diameter of about 1 mm to several mm. It is a thing. 04-05-2019 6 Then, the vibration transfer member 2 is in contact with and fixed to the acoustic diaphragm 1. [0022] In addition, although the vibration transmission member 2 is formed in rod shape as mentioned above, the shape can be made into various shapes, such as column shape, prismatic shape, plate shape. That is, although the vibration transmission member 2 is formed in a rod shape, the shape of the cross section can be circular, semicircular, rectangular, or other various shapes. [0023] The vibration transmitting member 2 is fixed to the acoustic diaphragm 1 by bonding with an adhesive, adhesive tape or the like, heat is applied for fusion, or the acoustic diaphragm 1 is embedded, etc. It can be done by various methods. Here, what is important is not the fixing method, but the point in which the vibration transfer member 2 is provided in contact with the acoustic diaphragm 1 by a predetermined length. [0024] In addition to the carbon fiber, the vibration transfer member 2 may be made of another material such as a piano wire made of steel, for example. That is, the vibration transfer member 2 needs to be a material having a small "internal loss" and a high "sound velocity", for example, a carbon fiber or a steel material. [0025] Here, "internal loss" literally means a loss when vibration propagates in a solid, and in other words, indicates whether the vibration is easily transmitted. Therefore, as the "internal loss" is small, it means that the propagation loss is small, and "the vibration propagates efficiently". Also, "sound velocity" means the transmission speed of an elastic wave propagating in an elastic body or a continuous body. 04-05-2019 7 [0026] Focusing on these internal loss and sound velocity , the material most desirable as the vibration transfer member 2 needs to have good vibration propagation efficiency, so first of all, a material with a small internal loss It is necessary to be there. [0027] Furthermore, in order to minimize the time delay of the start point (excitation point) and the end point (location farthest from the excitation point) of the vibration transfer member 2, it is necessary to be a material having a high "sound velocity". [0028] Thus, as the vibration transfer member 2, an appropriate one may be selected and used based on the "internal loss" and the "sound velocity". Specifically, various materials with smaller the acoustic diaphragm 1 may be used. internal loss and faster sound velocity than [0029] The vibration transfer member 2 is provided such that one end thereof is exposed to the upper end of the square hole provided in the acoustic diaphragm 1 for mounting the actuator 3 thereon. [0030] Thereby, when the actuator 3 is mounted in the square hole 4 of the acoustic diaphragm 1, one end of the vibration transfer member 2 exposed at the upper end of the square hole 4 is applied by the rod (excitation portion) of the actuator 3. You will be able to shake. [0031] [Configuration Example of Actuator] Here, a configuration example of the actuator 3 used in the speaker device of this embodiment will be described. 04-05-2019 8 In the speaker device of this embodiment, various actuators such as a piezoelectric actuator, an electrodynamic actuator, and a super magnetostrictive actuator can be used. [0032] The piezoelectric actuator uses an element that causes displacement by applying a voltage. Electrokinetic actuators use a current to generate vibrations in coils and magnets. The giant magnetostrictive actuator uses a giant magnetostrictive element whose element size changes in response to an external magnetic field. [0033] Here, a configuration example of a giant magnetostrictive actuator will be described as one of available actuators. FIG. 2 is a diagram for explaining a configuration example of the giant magnetostrictive actuator 3 used in the speaker device of this embodiment. This example is a case where a preload is applied to the giant magnetostrictive element, and FIG. 2 (A) is a top view, and FIG. 2 (B) is a side sectional view. [0034] As an actuator body, a solenoid coil 32 is disposed around a bar-shaped giant magnetostrictive element 31, and a magnet 33 and a yoke 34 are disposed around the solenoid coil 32. [0035] Further, the drive rod 35 is connected to one end of the giant magnetostrictive element 31, and the fixed board 36 is attached to the other end of the giant magnetostrictive element 31. [0036] The actuator main body is loaded in an outer casing case 39 made of, for example, aluminum so that the tip end of the drive rod 35 protrudes to the outside of the outer casing case 39. 04-05-2019 9 [0037] Furthermore, a damping material 37 made of silicone rubber or the like is loaded on the drive rod 35, and a screw 38 is inserted behind the fixed plate 36 to apply a preload to the giant magnetostrictive element 31. [0038] In the speaker device shown in FIG. 1, the actuator 3 having the configuration shown in FIG. 2 is mounted on and fixed to the square hole 4 of the acoustic diaphragm 1. [0039] In this case, a magnetostrictive characteristic is obtained in which the magnetic field range in which the magnetostrictive value changes linearly with the change of the control magnetic field is wide, and the change of the magnetostriction value with respect to the change of the control magnetic field in the magnetic field range is large. For example, the load on the giant magnetostrictive element 31 can be adjusted by compression of a coil spring or the like disposed below the actuator 3. [0040] [Operation of Speaker Device of This Embodiment] When a drive current according to an audio signal is supplied to the solenoid coil 32 of the actuator 3 having such a configuration, supermagnetostriction is caused by the influence of the magnetic field generated accordingly. The element 31 expands and contracts. [0041] Thereby, the drive rod 35 of the actuator 3 moves up and down, and the end of the vibration transfer member 2 is hit by the drive lot 35 as shown in FIG. In this manner, the actuator 3 applies vibration according to the audio signal to the vibration 04-05-2019 10 transfer member 2 provided not in the acoustic diaphragm 1 but in contact with the acoustic diaphragm 1. [0042] The vibration transmitting member 2 is a rod-like member made of carbon fiber as described above, and as described above, has a smaller "internal loss" than the acoustic diaphragm 1 which is an acrylic plate, and , "Sound velocity" is fast. [0043] For this reason, by vibrating one end of the vibration transfer member 2, the vibration efficiently propagates through the vibration transfer member 2 and reaches the other end of the vibration transfer member 2. [0044] And since the vibration transfer member 2 is provided in contact with the acoustic diaphragm 1, the vibration applied by the actuator 3 can be efficiently conducted as compared with the case where the acoustic diaphragm 1 is directly vibrated. Can be transmitted to one. [0045] As a result, the compression wave propagates efficiently in the acoustic diaphragm 1, and the acoustic diaphragm 1 vibrates more appropriately with respect to the excitation by the actuator 3 to widen the frequency band of the sound emitted by the acoustic diaphragm 1. Can. [0046] [Difference in sound emission time of the sound from the acoustic diaphragm 1] Further, when the sound velocity of the vibration transfer member 2 is faster than the sound velocity of the acoustic diaphragm 1, the excitation axis of the sound emitted from the acoustic diaphragm 1 It is possible to reduce the sound emission time difference in the direction. The sound emission time difference will be specifically described. [0047] 04-05-2019 11 FIG. 3 and FIG. 4 are diagrams for explaining the sound emission time difference in the excitation axis direction of the sound emitted from the acoustic diaphragm 1. Among these, FIG. 3 relates to the speaker device of this embodiment using the vibration transfer member 2. FIG. 4 relates to a speaker device that does not use the vibration transfer member 2. [0048] And FIG. 3 is a figure at the time of seeing the speaker apparatus shown in FIG. 1 from the side side as arrow a shows in FIG. As shown in FIG. 3, the vibration transfer member 2 is embedded in the acoustic diaphragm 1. Therefore, the vibration transmission member 2 is in a state in which the entire circumference is in contact with the acoustic diaphragm 1. [0049] Further, in FIG. 3, the surface indicated by the dotted line is a surface parallel to the acoustic diaphragm 1, and the surface indicated by the solid line is the sound wave surface Au of the sound emitted from the acoustic diaphragm 1. . [0050] Then, in the speaker device configured as shown in FIG. 3, when the vibration transfer member 2 is vibrated by the actuator 3, the vibration is rapidly transmitted to the entire acoustic diaphragm 1 through the vibration transfer member 2. [0051] In this case, in the lower part of the acoustic diaphragm 1 in the vicinity of the actuator 3, the 04-05-2019 12 transmission of the vibration is faster by the part closer to the actuator 3, so the sound is emitted slightly faster than the upper part of the acoustic diaphragm 1. [0052] However, since the vibration excited by the actuator 3 is also rapidly transmitted to the upper portion of the acoustic diaphragm 1 through the vibration transmitting member 2, the lower portion and the receiving portion of the acoustic diaphragm 1 are released. The sound time difference can be reduced. [0053] Specifically, as shown in FIG. 3, an angle formed by a plane parallel to the acoustic diaphragm 1 indicated by a dotted line and the sound wave surface Au of the sound emitted from the acoustic diaphragm 1 indicated by a solid line. It is made to be able to make beta small. [0054] On the other hand, as shown in FIG. 4, let us look at a vibration type speaker device which does not use the vibration transfer member 2. Also in FIG. 4, the surface indicated by the dotted line is a surface parallel to the acoustic diaphragm 1, and the surface indicated by the solid line is the sound wave surface Au of the sound emitted from the acoustic diaphragm 1. [0055] In the case of the vibration type speaker device which does not use the vibration transmitting member 2 shown in FIG. 4, it takes time until the vibration given by the actuator 3 is transmitted to the upper portion of the acoustic diaphragm 1 because the vibration transmitting member 2 is not present It takes [0056] Therefore, as shown in FIG. 4, the angle α between the plane parallel to the acoustic diaphragm 1 indicated by the dotted line and the sound wave surface Au of the sound emitted from the acoustic diaphragm 1 indicated by the solid line is , Is larger than the angle β shown in FIG. 04-05-2019 13 [0057] As can be seen by comparing FIG. 3 and FIG. 4, when the vibration transfer member 2 is brought into contact with the acoustic diaphragm 1 and the actuator 3 vibrates the vibration transfer member 2, the acoustic diaphragm 1 is directly The vibration can be transmitted to the whole of the acoustic diaphragm 1 more quickly than in the case of vibration. [0058] Thus, by using the vibration transmitting member 2 made of a material having a smaller "internal loss" and a faster "sound velocity" than the acoustic diaphragm 1, the vibration corresponding to the voice is not delayed through the vibration transmitting member 2 Can be applied to the entire acoustic diaphragm 1. [0059] Thereby, since the acoustic diaphragm 1 can be effectively vibrated, the frequency band of the sound (sound) emitted by vibrating the acoustic diaphragm 1 is expanded to form a better reproduction sound field. be able to. Also, in other words, the sound image can be localized to the whole of the acoustic diaphragm 1 through the vibration transfer member 2, and a better reproduction sound field can be formed. [0060] [Contact Length of Vibration Transmission Member 2 to Acoustic Diaphragm 1] By the way, in the case of the speaker device of the embodiment described above, the acoustic diaphragm 1 is formed of an acrylic plate, and the vibration transmission member 2 is formed of carbon fiber. As described in However, the acoustic diaphragm 1 and the vibration transfer member 2 can be formed of various materials (materials). [0061] 04-05-2019 14 And "internal loss" and "sound velocity" are different for each material. Therefore, depending on the material, shape, size, etc. of one or both of the acoustic diaphragm 1 and the vibration transmission member 2, the length (contact length) for causing the vibration transmission member 2 to be in contact with the acoustic diaphragm 1 is Various adjustments are possible. [0062] 5 and 6 are diagrams for explaining the contact length of the vibration transfer member 2 with the acoustic diaphragm 1. FIG. [0063] For example, as shown in FIG. 5A, when one or both of the acoustic diaphragm 1 and the vibration transfer member 2 are made of a material whose internal loss is not so small and the sound velocity is not so fast. The vibration transfer member 2 is brought into contact with the acoustic diaphragm 1 longer. [0064] As shown in FIG. 5B and FIG. 5C, if the material is small in internal loss and fast in sound velocity for one or both of the acoustic diaphragm 1 and the vibration transfer member 2. The length of the vibration transfer member 2 to be brought into contact with the acoustic diaphragm 1 is shortened. [0065] Further, in order to transmit the vibration to the acoustic diaphragm 1 more efficiently by one actuator, for example, as shown in FIGS. 6 (A), (B) and (C), 2 of the acoustic diaphragm 1 The vibration transmission member 2 may be provided in contact with the side, the three sides, and the four sides. [0066] In this case, in order to prevent deterioration of the vibration transfer characteristics of the 04-05-2019 15 vibration transfer member 2, the bent portion is made to be a curve. It is preferable that the vibration transfer member 2 be a curve having continuity as a whole. [0067] As described above, according to the material, size, shape, etc. of one or both of the acoustic diaphragm 1 and the vibration transfer member 2, desired acoustic characteristics (frequency characteristics, time response, phase characteristics, etc.) can be realized. In addition, it is possible to adjust variously the contact length of the vibration transfer member 2 to the acoustic diaphragm 1. [0068] [Variation of Installation Position and Installation Method of Vibration Transmission Member 2] FIGS. 7 to 12 illustrate variations of the installation position and installation method when the vibration transmission member 2 is provided to the acoustic diaphragm 1. FIG. [0069] [Variation 1] In FIG. 1, one vibration transfer member 2 is provided on the left and right of the acoustic diaphragm 1. However, as shown in FIG. 7, it is also possible to provide one vibration transfer member 2 in the central portion of the acoustic diaphragm 1. In this case, one square hole 4 for mounting the actuator 3 may be used, and one actuator 3 may be used. [0070] [Variation 2] Further, as shown in FIG. 1, instead of providing the vibration transfer member 2 inside the vibration transfer member 2, as shown in FIG. 2b may be provided. [0071] 04-05-2019 16 In this case, in order to mount an actuator for applying vibration to the vibration transfer members 2a and 2b at an appropriate position, as shown in FIG. 8, a notch is cut below the lower end portion of the vibration transfer members 2a and 2b. The part 6 may be provided. [0072] As described above, the vibration transfer member 2 may be provided in contact with the side surface of the acoustic diaphragm 1 without being limited to the case where the vibration transmission member 2 is provided inside the acoustic diaphragm 1. The point is that the vibration transfer member 2 may be provided in contact with the acoustic diaphragm 1 so as to have a certain contact length with the acoustic diaphragm 1. [0073] In the case of the speaker device described above, by providing the square hole 4 and the notch 6 with respect to the acoustic diaphragm 1, all or part of the actuator 3 is positioned inside the acoustic diaphragm 1. I made it. However, it is not limited to this. [0074] The actuator 3 may be provided outside the acoustic diaphragm 1. The point is that the actuator 3 can be provided at an appropriate position where vibration can be applied to the vibration transmitting member 2 provided to be in contact with the acoustic diaphragm 1. [0075] 04-05-2019 17 [Variation 3] Further, although the vibration transfer member 2 is provided along the short side of the acoustic diaphragm 1, it is not limited to this. For example, as shown in FIG. 9, the vibration transmitting member 2a may be disposed obliquely to the acoustic diaphragm 1. In this case, the vibration transfer member 2 a is configured to vibrate in the directions indicated by the double arrows in the vicinity of the vibration transfer member 2 a, and can transfer the vibration to the acoustic diaphragm 1. [0076] Further, as shown in FIG. 9, as the vibration transfer member 2b is shown, the vibration transfer member may be disposed in the longitudinal direction of the acoustic diaphragm 1 (along the short side). In this case, the vibration transfer member 2 b is vibrated in the directions indicated by the double arrows in the vicinity of the vibration transfer member 2 b, and can transfer the vibration to the acoustic diaphragm 1. [0077] [Variation 4] The acoustic diaphragm is formed of, for example, an acrylic plate, and can be formed to have a curved portion. For example, as shown in FIG. 10, it is assumed that a curved acoustic diaphragm 1a having a curved portion is formed. [0078] 04-05-2019 18 The vibration transmitting member is, as described above, a rod-like member made of carbon fiber, a so-called piano wire made of steel, or the like. Therefore, as shown in FIG. 10, the vibration transfer member 2a can be provided in contact along the curved portion of the curved acoustic diaphragm 1a. [0079] In this case, the vibration transfer member 2a is vibrated in the directions indicated by the double arrows in the vicinity of the vibration transfer member 2a, and can transfer the vibration to the acoustic diaphragm 1a. [0080] Further, as shown in FIG. 10, as the vibration transfer member 2b is shown, the vibration transfer member may be disposed in the lateral direction of the acoustic diaphragm 1a (along the long side). In this case, the vibration transfer member 2b is vibrated in the direction indicated by the double arrows in the vicinity of the vibration transfer member 2b, and can transfer the vibration to the acoustic diaphragm 1a. [0081] Thus, the vibration transfer member can be disposed at various positions with respect to the acoustic diaphragm. Also, even if the acoustic diaphragm has a curved portion, a vibration transmission member may be disposed along the curved portion to appropriately transmit the vibration also to the acoustic diaphragm having a curved portion. it can. [0082] 04-05-2019 19 [Variation 5] In the example of the embodiment described above, one actuator vibrates one vibration transmission member, but the invention is not limited to this. It is also possible to have a configuration in which one actuator excites a plurality of vibration transfer members, and one actuator excites a branched vibration transfer member. [0083] FIG. 11 is an example of a speaker device configured to vibrate the two vibration transfer members 2 a and 2 b by the both-end actuator 5. [0084] In FIG. 11, the both-end actuator 5 is configured to provide the drive rod 35 and the damping material 37 not only on the upper side but also on the lower side of the giant magnetostrictive actuator 3 described with reference to FIG. [0085] Thereby, the both-ends actuator 5 vibrates the vibration transmission member 2a provided on the left side of the acoustic diaphragm 1 by one drive rod, and the vibration transmission member provided on the right side of the acoustic diaphragm 1 by the other drive rod. Vibrate 2b. [0086] Since each of the vibration transfer members 2a and 2b is provided to be in contact with the acoustic diaphragm 1, the vibration given by the both-end actuator 5 is transmitted through the vibration transfer members 2a and 2b. The plate 1 is efficiently transmitted. [0087] [Variation 6] FIG. 12 is an example of a speaker device configured using a vibration transfer member 2c that is branched off halfway. [0088] 04-05-2019 20 In FIG. 12, the actuator 3 has the configuration described with reference to FIG. Further, as shown in FIG. 12, the vibration transfer member 2c used in the speaker device of this example is configured to be branched into three on the way. [0089] Then, as shown in FIG. 12, one of the vibration transfer member 2 c is branched into three, one on the left side of the acoustic diaphragm 1 and the other on the center of the acoustic diaphragm 1. One is in contact with the right side portion of the acoustic diaphragm 1 respectively. [0090] Further, in the vibration transfer member 2c, the branch portion is curved. Thereby, the transmission efficiency of the vibration is prevented from being reduced at each branch portion of the vibration transmission member 2c. [0091] Then, in the case of this example, the end portion of the vibration transfer member 2c is vibrated by the actuator 3 so that the vibration can be efficiently transmitted to the whole of the acoustic diaphragm 1 through each portion where the vibration is branched. it can. [0092] As described above, vibration can be more efficiently performed by using a configuration in which a plurality of vibration transfer members are vibrated by one actuator, or a vibration transfer member which is branched by one actuator is vibrated. It can be transmitted to the acoustic diaphragm 1. [0093] The examples shown in FIGS. 11 and 12 are merely examples, and the position at which the vibration transfer member is provided to the acoustic diaphragm 1, the number of branches, and the like can be made appropriate. 04-05-2019 21 [0094] [Modified Example of Shape of Acoustic Diaphragm and Use of Acoustic Diaphragm] Incidentally, as described above, the acoustic diaphragm is not limited to the rectangular one. For example, various shapes such as a circle, a semicircle, a sector, a triangle, and a star can be used. Moreover, the acoustic diaphragm can also be made into various three-dimensional shape. [0095] [Example in which Acoustic Diaphragm has Three-Dimensional Shape (Modified Example 1)] FIG. 13 is a diagram for describing an example in which the acoustic diaphragm is formed in a cylindrical shape. As shown in FIG. 13, the acoustic diaphragm 1x formed on a cylinder has a thickness of, for example, several mm. [0096] Then, inside the acoustic diaphragm 1x, vibration transmitting members 2a, 2b, 2c and 2d are at positions excited by the actuator from the bottom side of the acoustic diaphragm 1x in the height direction of the acoustic diaphragm 1x. It has a configuration provided. [0097] Each of the vibration transfer members 2a, 2b, 2c and 2d is exposed on the bottom side of the acoustic diaphragm 1, and can be directly vibrated by an actuator. [0098] Thereby, even in the case of using the acoustic diaphragm 1x formed in a cylindrical shape, the 04-05-2019 22 vibration according to the audio signal is efficiently made over the entire acoustic diaphragm 1x through the vibration transfer members 2a, 2b, 2c and 2d. Be able to communicate. [0099] Therefore, it is possible to realize high sound quality of the sound to be emitted, for example, the frequency band of the sound signal that can be emitted can be further expanded. [0100] In addition, although the case where the acoustic diaphragm was formed in cylindrical shape was demonstrated here, it does not restrict to this. It is also possible to form the acoustic diaphragm into prisms of various numbers of angles, such as in a triangular prism, a quadrangular prism, a pentagonal prism, or a hexagonal prism. [0101] Moreover, it is also possible to set it as various three-dimensional shapes, such as forming an acoustic diaphragm into a spherical form, or forming into a hemispherical form. [0102] Then, regardless of what three-dimensional acoustic diaphragm is used, the vibration transmission member may be provided at a position where the actuator can excite. The number may be provided corresponding to the actuator, and the length of the vibration transfer member may be an appropriate length. [0103] Further, the vibration transmitting member does not have to be embedded in the acoustic diaphragm and may be fixed by any of various methods so as to be in contact with any position of the acoustic diaphragm. 04-05-2019 23 [0104] [Example of using a plurality of acoustic diaphragms (Modification 2)] As described above, by providing a vibration transmission member in contact with the acoustic diaphragm, the actuator can be efficiently driven through the vibration transmission member. Can transmit signals from [0105] Therefore, the acoustic diaphragm is not limited to the acrylic plate, and it is possible to use paper, metals such as magnesium, plastics, and other various materials (materials). Further, the number of acoustic diaphragms is not limited to one, and a plurality of acoustic diaphragms may be used. [0106] In the following, an example in which a plurality of acoustic diaphragms are used will be described. In the example described below, the case where acoustic diaphragms of different materials are used will also be described. [0107] [First example in the case of using a plurality of acoustic diaphragms] FIG. 14 is a diagram for explaining an example of a speaker device using two acoustic diaphragms 1a and 1b. As shown in FIG. 14, the acoustic diaphragm 1a is made of magnesium, and the acoustic diaphragm 1b is made of paper. Each of the acoustic diaphragms 1a and 1b has a certain thickness and does not curl or break 04-05-2019 24 even if the user does not press it. [0108] And as shown in FIG. 14, the vibration transfer member 2 is provided in contact with the central portion of each of the acoustic diaphragms 1a and 1b. In this case, the vibration transfer member 2 is adhered to the acoustic diaphragms 1a and 1b by, for example, an adhesive. [0109] As in the case of the above-described embodiment, the vibration transfer member 2 has a small internal loss such as, for example, a rod-shaped carbon fiber or a piano wire formed by using steel. The speed of sound is fast. [0110] The acoustic diaphragm 1a formed by using magnesium has a relatively small internal loss, and responds well to vibrations in the high band (high band side). For this reason, the acoustic diaphragm 1a is used to emit the high frequency side sound. [0111] In addition, the acoustic diaphragm 1b formed by using paper has a large internal loss as compared to magnesium, and responds well to vibrations in the low region (low region). For this reason, the acoustic diaphragm 1b is used to emit low-range sound. [0112] 04-05-2019 25 FIG. 15 is a diagram for explaining the vibration characteristics of magnesium and paper. As shown in FIG. 15, in the case of the acoustic diaphragm 1a formed of magnesium, it is possible to emit high-pitched sound with high sound pressure in response to high frequency vibration. On the other hand, in the case of the acoustic diaphragm 1b made of paper, as shown in FIG. 15, in response to the low frequency vibration, the sound in the low tone range can be emitted with high sound pressure. [0113] Then, to the end of the vibration transfer member 2 which is made to contact each of the acoustic diaphragms 1a and 1b, vibration according to the audio signal is applied by the actuator 3 as shown in FIG. Shake. [0114] Thus, the vibration according to the audio signal is efficiently transmitted to each of the acoustic diaphragms 1a and 1b through the vibration transfer member 2, and the sound according to the vibrations transmitted from each of the acoustic diaphragms 1a and 1b. Is emitted. [0115] In this case, by using the magnesium acoustic diaphragm 1a and the paper acoustic diaphragm 1b, the reproduction frequency characteristic can be expanded to the high band side and the low band side. That is, the reproduction frequency characteristic is comprehensively expanded, and a good reproduction sound field can be formed. [0116] 04-05-2019 26 [Second Example in the Case of Using a Plural Acoustic Vibrating Plates] FIG. 16 is a view for explaining another example of a speaker device using two acoustic vibrating plates 1a and 1b. As shown in FIG. 15, also in this example, the acoustic diaphragm 1a is formed of magnesium, and the acoustic diaphragm 1b is formed of paper. Also in this example, each of the acoustic diaphragms 1a and 1b has a certain thickness and does not curl or break even if the user does not press it. [0117] Then, as shown in FIG. 16, in the case of this example as well, the vibration transfer member 2x is provided in contact with the central portions of the acoustic diaphragms 1a and 1b. Also in this example, the vibration transfer member 2x is adhered to the acoustic diaphragms 1a and 1b by, for example, an adhesive. [0118] As in the case of the speaker device of the first example shown in FIG. 14, the vibration transfer member 2 x may be, for example, a rod made of carbon fiber, a piano wire formed of steel, or the like. The internal loss is small and the sound velocity is fast. [0119] However, as shown in FIG. 16, the vibration transfer member 2x of this example is configured to be branched into two. The bifurcated portion is curved so as not to damp the vibration as much as possible. [0120] 04-05-2019 27 Then, as shown in FIG. 16, the end of the vibration transfer member 2 x is vibrated by the actuator 3. Therefore, the vibration according to the excitation by the actuator 3 is transmitted to each of the acoustic diaphragms 1a and 1b through the vibration transmitting member 2x. [0121] Thus, the vibration is efficiently transmitted to each of the acoustic diaphragms 1a and 1b through the vibration transmitting member 2x which is branched, and the vibration is transmitted according to the vibration transmitted from each of the acoustic diaphragms 1a and 1b. Sound is emitted. [0122] In this case, as in the case of the speaker device described with reference to FIG. 14, by using the magnesium acoustic diaphragm 1 a and the paper acoustic diaphragm 1 b, the reproduction frequency can be obtained both in the high band and the low band. Characteristics can be expanded. That is, the reproduction frequency characteristic is comprehensively expanded, and a good reproduction sound field can be formed. [0123] In the case of this example, by using the vibration transfer member 2x branched into two, vibration is transmitted equally (equally) to each of the acoustic diaphragm 1a and the acoustic diaphragm 1b. be able to. [0124] [Third Example in the case of Using a plurality of Acoustic Diaphragms] FIG. 17 is a diagram for describing an example of a speaker device using three acoustic diaphragms 1a, 1b, and 1c. 04-05-2019 28 As shown in FIG. 17, the acoustic diaphragm 1a is formed of magnesium, and the acoustic diaphragms 1b and 1c are formed of paper. Also in this example, each of the acoustic diaphragms 1a, 1b, and 1c has a certain thickness and does not curl or break even if the user does not press it. [0125] And as shown in FIG. 17, the vibration transmission member 2 is provided in contact with each of the acoustic diaphragms 1a, 1b and 1c. Also in this example, the vibration transfer member 2 is adhered to each of the acoustic diaphragms 1a, 1b, and 1c by, for example, an adhesive. [0126] And in the case of this example, the position which contacts the vibration transfer member 2 is made to differ for each of acoustic diaphragm 1a, 1b, 1c. That is, the vibration transfer member 2 is in contact with the right end of the acoustic diaphragm 1a. Further, the vibration transfer member 2 is in contact with the central portion of the acoustic diaphragm 1b. Further, the vibration transfer member 2 is in contact with the left end side of the acoustic diaphragm 1c. [0127] Also in this example, as in the case of the above-described embodiment, the vibration transfer member 2 may be, for example, a rod-shaped carbon fiber, a piano wire formed by using steel, etc. The internal loss is small and the sound velocity is fast. [0128] Also in this example, as in the case of the first and second examples described above, the acoustic diaphragm 1a formed by using magnesium is used to emit the high-frequency side sound. Be 04-05-2019 29 Also in this example, as in the case of the first and second examples described above, the acoustic diaphragm 1b formed by using paper is used to emit low-range sound. Be [0129] Then, as shown in FIG. 17, the vibration according to the audio signal is applied by the actuator 3 to the end of the vibration transfer member 2 which is made to contact each of the acoustic diaphragms 1a, 1b and 1c. It is shaken. [0130] Thereby, the vibration according to the audio signal is efficiently transmitted to each of the acoustic diaphragms 1a, 1b and 1c through the vibration transmitting member 2, and the vibrations transmitted from each of the acoustic diaphragms 1a, 1b and 1c The sound according to is emitted. [0131] In this case, by using the magnesium acoustic diaphragm 1a and the paper acoustic diaphragms 1b and 1c, the reproduction frequency characteristic can be expanded to the high band side and the low band side. That is, the reproduction frequency characteristic is comprehensively expanded, and a good reproduction sound field can be formed. [0132] [Fourth example in the case of using a plurality of acoustic diaphragms] FIG. 18 is a view for explaining another example of a speaker device using three acoustic diaphragms 1a, 1b and 1c. As shown in FIG. 18, also in this example, the acoustic diaphragm 1a is formed of magnesium, and the acoustic diaphragms 1b and 1c are formed of paper. Also in this example, each of the acoustic diaphragms 1a, 1b, and 1c has a certain thickness and does not curl or break even if the user does not press it. 04-05-2019 30 [0133] Then, as shown in FIG. 18, in the case of this example, the vibration transfer member 2y is provided in contact with the central portions of the acoustic diaphragms 1a, 1b, and 1c. In this case, the vibration transfer member 2y is adhered to the acoustic diaphragms 1a, 1b, 1c by, for example, an adhesive. [0134] As in the case of the speaker devices of the first to third examples described above, the vibration transfer member 2y may be, for example, a rod made of carbon fiber, a piano wire formed of steel, or the like. The internal loss is small and the sound velocity is fast. [0135] And the vibration transfer member 2y of this example is comprised so that it might branch to three as shown in FIG. The bifurcated portions are curved so as not to damp the vibration as much as possible. [0136] Then, as shown in FIG. 18, the end of the vibration transfer member 2 y is vibrated by the actuator 3. Therefore, the vibration according to the excitation by the actuator 3 is transmitted to each of the acoustic diaphragms 1a, 1b, 1c through the vibration transmitting member 2y. [0137] Thereby, the vibration is efficiently transmitted to each of the acoustic diaphragms 1a, 1b, 1c through the vibration transfer member 2y, and the sound according to the vibration transmitted from each of the acoustic diaphragms 1a, 1b, 1c. Is emitted. [0138] 04-05-2019 31 In this case, by using the magnesium acoustic diaphragm 1a and the paper acoustic diaphragms 1b and 1c, the reproduction frequency characteristic can be expanded to the high band side and the low band side. That is, the reproduction frequency characteristic is comprehensively expanded, and a good reproduction sound field can be formed. [0139] In the case of this example, by using the vibration transfer member 2y branched into three, vibration is transmitted equally (equally) to each of the acoustic diaphragm 1a and the acoustic diaphragm 1b. be able to. [0140] [Another example in the case of using a plurality of acoustic diaphragms] The number of acoustic diaphragms to be used can be an appropriate number. In that case, it is also possible to set it as the structure vibrated by the actuator different for every acoustic diaphragm. Further, as described with reference to FIGS. 16 and 18, the vibration transfer member may be branched to transmit the vibration from one actuator to a plurality of acoustic diaphragms. . [0141] In addition, the shape of the acoustic diaphragm can also be various shapes such as a circle, a sector, a triangle and the like. Also, the shape can be made different for each acoustic diaphragm that can receive a plurality of pieces. Also, the shape and size may be made different for each acoustic diaphragm. For example, it is also possible to make the acoustic diaphragm emitting the low frequency side sound larger than the acoustic diaphragm emitting the high frequency side sound. 04-05-2019 32 [0142] Also, the material of the acoustic diaphragm is not limited to magnesium and paper. Of course, it is also possible to use an acoustic diaphragm made of magnesium only or an acoustic diaphragm made of paper only. Of course, it is also possible to use an acoustic diaphragm made of a material other than magnesium or paper. For example, acoustic diaphragms made of various materials such as plastic, glass, various fibers, etc. can be used. [0143] [Application Example of Speaker Device of This Embodiment (Modification 3)] FIG. 19 is a diagram for describing an application example of the speaker device of one embodiment of the present invention. The application shown in FIG. 19 is an example in which the speaker device according to the embodiment of the present invention is applied to a display device such as a television receiver, for example. [0144] The speaker device of this example basically has, as in the case of the speaker device described with reference to FIG. 1 and FIG. 2, etc., for example, an acoustic diaphragm made of an acrylic plate and vibrations of carbon fiber, piano wire, etc. It consists of a transmission member and an actuator that excites the vibration transmission member. [0145] The speaker device of this example is, as shown in FIG. 19, a front surface of a display element such as a cathode ray tube (CRT), a liquid crystal display (LCD), an organic electroluminescence (EL) panel, or a plasma display panel (PDP). It is provided on the side. [0146] Specifically, as shown in FIG. 19, an acoustic diaphragm 1 of, for example, an acrylic plate is provided on the front side of the display element 7. In the acoustic diaphragm 1, a vibration transfer member 2L is provided on the left side of a 04-05-2019 33 frame portion 1f which is a portion around the display screen of the display element 7, and a vibration transfer member 2R is provided on the right side of the frame portion 1f. . [0147] Each of the vibration transfer members 2L and 2R is provided in contact with the vibration transfer member 1. The actuator 3L is provided on the lower end side of the vibration transfer member 2L, and the actuator 3R is provided on the lower end side of the vibration transfer member 2R. [0148] Then, to the vibration transfer members 2L and 2R, vibrations corresponding to the audio signal are applied from the lower end side by the actuators 3L and 3R as shown by double arrows in FIG. [0149] In this case, the actuator 3L generates a vibration corresponding to the left channel audio signal among the left and right channel audio signals. Similarly, the actuator 3R generates a vibration according to the audio signal of the right channel among the audio signals of the left and right channels. [0150] Thereby, the vibration according to the audio signal of the left channel is efficiently transmitted through the vibration transmitting member 2L mainly on the left side of the acoustic diaphragm 1, and the sound according to the transmitted vibration is transmitted to the left of the acoustic diaphragm 1. It is made to emit sound from the left side. [0151] Similarly, the vibration according to the sound signal of the right channel is efficiently 04-05-2019 34 transmitted to the right of the acoustic diaphragm 1 mainly through the vibration transmitting member 2R, and the sound according to the transmitted vibration is of the acoustic diaphragm 1 It is made to emit from the right side. [0152] And in this case, since the sound is emitted by vibrating the acoustic diaphragm 1 positioned on the front side of the display screen 7 of the display element, the same direction as the display screen of the display element on which the image is displayed The sound corresponding to the displayed image is emitted from [0153] Thus, the audio to be reproduced in synchronization with the video can be emitted from the same direction as the display screen on which the video is displayed, so that the user can listen to the corresponding audio without discomfort as well as the video to be reproduced. Be able to do that. [0154] [Effects of the Embodiment] In the speaker device of this embodiment, the acoustic vibration plate is brought into contact with the vibration transmitting member for transmitting the compressional wave according to the vibration from the actuator, thereby providing the acoustic vibration. The compressional waves can be efficiently transmitted to the plate. [0155] That is, even when the mechanical impedance matching between the acoustic diaphragm and the actuator can not be sufficiently obtained, the use of the vibration transmitting member can raise the transmission efficiency (propagation efficiency) of the vibration. [0156] Thereby, it is possible to realize a speaker device that covers a wider frequency band than in the past. Further, with regard to the sound image localization effect, a more uniform sound image localization effect can be obtained over the entire acoustic diaphragm. 04-05-2019 35 [0157] In addition, by using a plurality of acoustic diaphragms made of different materials, it is possible to realize a speaker device that covers a wider frequency band. [0158] Further, by making the vibration transmitting member in contact with the acoustic diaphragm, it is possible to efficiently transmit the vibration, so that it is possible to use a material that can not be used conventionally as the acoustic diaphragm. [0159] For example, thin plastic, kraft paper, thin processed magnesium plate, etc. can be used. As a result, the acoustic diaphragm can be easily processed, and a speaker device having a completely different design from that of a conventional speaker can be realized. That is, the degree of freedom in design of the speaker device can be expanded. [0160] [Others] [Materials, Shape, Size, Etc. of Constituent Elements] As described above, various materials, shapes, sizes of the acoustic diaphragm can be used. In addition, various materials, shapes and sizes of the vibration transmission member can be used. In addition, the number of acoustic diaphragms, the number of vibration transfer members, the number of actuators, and the like can be set as appropriate. 04-05-2019 36 [0161] The material of the acoustic diaphragm, the shape, the size, the material of the vibration transmission member, the shape, the size, the number of the acoustic diaphragms, the number of the vibration transmission members, the number of the actuators, etc. The characteristics (frequency characteristics, time response, phase characteristics, etc.) can be selected as appropriate within a feasible range. [0162] Further, as described above, it has been described that the vibration transfer member 2 uses an internal loss smaller than that of the acoustic diaphragm 1 and a high sound velocity . Here, a specific example is shown about selection of the material of the acoustic diaphragm 1 and the vibration transmission member 2. [0163] For example, as a forming material of the acoustic diaphragm 1, it is conceivable to use, for example, epoxy resin or paper (corn paper). Here, the internal loss sec (milliseconds). of the epoxy resin is 0.026, and the In addition, the internal loss 1650 m / sec (milliseconds). sound velocity of paper (corn paper) is 0.04, and the is 1700 m / sound velocity is [0164] Therefore, when using an epoxy resin or paper (cone paper) as the acoustic diaphragm 1, the vibration transmitting member 2 made of a material having an internal loss smaller than the above-mentioned internal loss and having a higher speed of sound than the above-mentioned speed of sound Needs to be used. 04-05-2019 37 [0165] In this case, as a candidate of the vibration transfer member 2, for example, titanium may be mentioned. The "internal loss" of titanium is 0.002 and the "sound velocity" is 4950 m / sec. Therefore, when using epoxy resin or paper (corn paper) as the acoustic diaphragm 1, for example, by using the vibration transmission member 2 formed of titanium, the signal from the actuator can be efficiently transmitted through the vibration transmission member 2. It can be transmitted to the acoustic diaphragm 2. [0166] As described above, the vibration transfer member 2 is made of various materials having a sufficiently small "internal loss" and a sufficiently fast "sound velocity" as compared with the material of the acoustic diaphragm 1 used. Good. [0167] Also, as the actuator, various actuators such as a piezoelectric actuator, an electrodynamic actuator, and a super magnetostrictive actuator can be used. [0168] Also, various types of paper can be used as the acoustic diaphragm. For example, drawing paper, kraft paper, or other processed paper subjected to various processing can be used. [0169] [Configuration Example of Vibration Transmission Member] The vibration transmission member 04-05-2019 38 2 is not limited to one having a predetermined length. The vibration transfer member 2 may be configured to be adjustable in length. For example, the structure of the vibration transfer member can be a structure of a so-called antenna rod in which a plurality of vibration transfer members having different thicknesses can expand and contract. [0170] In addition, a plurality of vibration transmission members having screws (one-sided male screw and one-side female screw) cut at the tip may be prepared, and a single vibration transmission member may be configured by connecting male and female screws as needed. It is possible. [0171] Then, for example, the vibration transmission member of the length shown in FIG. 5 (B) and the vibration transmission member of the length shown in FIG. 5 (C) are connected so as to be able to expand and contract as required. Keep them ready or connect them as needed. [0172] Thus, for example, when the acoustic diaphragm has a relatively large internal loss, it is extended and brought into contact, and conversely, when the acoustic diaphragm has a relatively small internal loss. Can be adjusted by the user himself, such as adjusting to be short and touching. [0173] As described above, by making the length of the vibration transfer member adjustable, the acoustic vibration plate and the vibration transfer member can be selected, for example, when the user can select the acoustic vibration plate and the vibration transfer member. This is convenient when it is necessary to adjust the contact state with the [0174] [Applicable Device, Etc.] In the above-described embodiment, the speaker device according to the embodiment of the present invention is applied to a television receiver. However, the present invention is not limited to this. 04-05-2019 39 It is also possible to apply the speaker apparatus of this invention other than a television receiver. For example, the speaker device of the present invention can be applied to a mobile phone terminal, a portable game, and the like. [0175] In particular, the speaker device of the present invention can also be applied to a foldable portable information terminal. In the foldable portable information terminal, for example, even if an acoustic diaphragm is provided on the display screen and an actuator is provided on the main body side, the vibration transfer member can be bent, so it can be folded. is there. In this case, if the vibration transfer member is in an extended state at the time of use, the vibration can be efficiently transmitted to the acoustic diaphragm. [0176] The present invention can also be applied to the windshield portion of a car and other window glass portions. Further, the speaker device of the present invention can be applied to various positions such as a window of a house, a mirror of a bathroom or a bathroom, or a mirror of a dresser placed in a room. [0177] DESCRIPTION OF SYMBOLS 1 ... Acoustic diaphragm, 2 ... Vibration transmission member, 3 ... Actuator 4. Square hole part, 1a, 1b, 1c ... Acoustic diaphragm, 2a, 2b, 2c, 2d, 2x, 2y ... Vibration transmission member, 1f ... Frame part 2L, 2R ... Vibration transmission member, 3L, 3R ... Actuator, 5 ... Both end actuator, 6 ... Notch part, 7 ... Display element 04-05-2019 40
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