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 JP2012253603 The present invention can effectively transmit the vibration generated by a drive member to the entire diaphragm, reduce the depth dimension, and control the sound pressure in a wide frequency band even if the narrow and narrow front shape is adopted. It is possible to reproduce sharp bass and clear middle to high tone, to have good tone reproducibility, and to have high sound quality. A speaker device having a flat diaphragm and a driver unit for vibrating the diaphragm, wherein the diaphragm has a narrow and elongated planar shape, and the driver unit is driven to generate a vibration. Member, a vibration transmission member for transmitting the vibration of the drive member to the diaphragm, and a vibration transmission auxiliary member added to the vibration transmission member, the vibration transmission member being in contact with the rear surface of the diaphragm, the vibration transmission auxiliary member being And abuts on the rear surface of the diaphragm over a range wider than the vibration transmitting member in the longitudinal direction of the moving plate. [Selected figure] Figure 1 Speaker device [0001] The present invention relates to a speaker device. [0002] 2. Description of the Related Art Conventionally, a speaker device having a flat diaphragm is used to generate sound by being attached to a television receiver or the like (see, for example, Patent Document 1). 10-05-2019 1 Such a speaker device has a dynamic type speaker unit and vibrates a flat diaphragm provided in the speaker unit to generate sound. [0003] FIG. 7 is a cross-sectional view showing the structure of a conventional speaker device. [0004] In the figure, reference numeral 831 denotes a frame of the speaker device, which supports the speaker unit and is attached to an audio device such as a television receiver by fixing an attachment member (not shown) formed around the member with a bolt or the like. [0005] A magnet 841 functioning as a driver unit of the speaker device, a bottom plate 842a, a top plate 842b, a center port 842c, a voice coil 843 and the like are disposed behind (downward in the drawing) the frame 831. The voice coil 843 is wound around a cylindrical bobbin 844. [0006] Further, a flat diaphragm 846 is disposed on the front surface (upper surface in the figure) of the frame 831. The diaphragm 846 has its outer periphery coupled to the front end of the frame 831 via a diaphragm edge 847 and a gasket 837. The rear surface of the diaphragm 846 is coupled to the bobbin 844 via a drive cone 851. The inner periphery of the damper 848 is connected to the outer periphery of the bobbin 844, and the outer periphery of the damper 848 is connected to the frame 831. 10-05-2019 2 [0007] Thereby, the vibration of the voice coil 843 is transmitted to the diaphragm 846 through the bobbin 844 and the drive cone 851, and a desired sound can be reproduced. [0008] JP-A-61-113399 [0009] However, in the conventional speaker device, when the diaphragm 846 has an elongated flat plate shape such as a rectangular shape, the vibration of the voice coil 843 can not be transmitted faithfully to the entire diaphragm 846, and the sound quality is degraded. Resulting in. [0010] In recent years, miniaturization and thinning of audio equipment such as a television receiver have progressed, and in particular, in an audio equipment such as a flat television receiver using a liquid crystal display, a plasma display, etc., a speaker device is attached inside It is difficult to find a space with depth. Also, it is difficult to find a wide space in the frame portion around the display. [0011] Therefore, in order to be attached to a thin and small-sized audio device such as a flat-screen television receiver, it is necessary to reduce the depth dimension of the speaker device and to adopt a narrow and elongated front shape. When the depth dimension is reduced, the distance between the voice coil 843 and the diaphragm 846 becomes short, and when the narrow front shape is adopted, the diaphragm 846 narrows and becomes elongated. It becomes difficult to transmit to the whole, and the sound quality is degraded. [0012] The present invention solves the problems of the above-mentioned conventional speaker device, and adds a vibration transmission assisting member to a vibration transmitting member for transmitting the vibration generated by the driving member to a flat diaphragm, thereby 10-05-2019 3 providing The generated vibration can be effectively transmitted to the entire diaphragm, and the sound pressure can be controlled in a wide frequency band even if the depth dimension is reduced and the narrow and narrow front shape is adopted, It is an object of the present invention to provide a speaker device which can reproduce good bass and clear middle and high tones, has excellent sound reproducibility, and has high sound quality. [0013] Therefore, in the speaker device of the present invention, the speaker device has a flat diaphragm and a driver unit for vibrating the diaphragm, and the diaphragm has a narrow and elongated planar shape. The driver unit includes a driving member generating vibration, a vibration transmitting member transmitting vibration of the driving member to the diaphragm, and a vibration transmitting auxiliary member added to the vibration transmitting member, the vibration transmitting member Is in contact with the rear surface of the diaphragm, and the vibration transmission auxiliary member is in contact with the rear surface of the diaphragm over a wider range than the vibration transmission member in the longitudinal direction of the diaphragm. [0014] In another speaker device according to the present invention, the diaphragm further includes a rear convex portion protruding rearward, and the front end edge of the vibration transmission member and the front end edge of the vibration transmission auxiliary member are the rear convex portion. Abuts the back of the [0015] In still another speaker device according to the present invention, the vibration transfer member is a cylindrical member extending forward from the front end of the drive member, and the vibration transfer assisting member is the vibration transfer member. A member with a closed cross-section attached to the front end of the [0016] In still another speaker device according to the present invention, the vibration transfer assisting member further includes a tube including a straight portion extending in a straight line parallel to each other and a corner portion connecting both ends of the straight portion. The back convex portion includes a pair of straight portions, and the entire front end edge of the straight portion abuts on the back surface of the straight portion. 10-05-2019 4 [0017] In still another speaker device according to the present invention, the longitudinal dimension of the vibration transfer auxiliary member is 1/3 to 1/2 of the longitudinal dimension of the diaphragm. [0018] According to the present invention, the speaker device is configured to add the vibration transmission assisting member to the vibration transmitting member for transmitting the vibration generated by the driving member to the flat diaphragm. Thereby, since the vibration generated by the drive member can be effectively transmitted to the entire diaphragm, the sound pressure can be reduced in a wide frequency band even if the depth dimension is reduced and the narrow and elongated front shape is adopted. It is possible to control, to reproduce sharp bass and clear middle to high tones, to improve the reproducibility of the sound, and to improve the sound quality. [0019] It is an exploded view of a speaker device in an embodiment of the present invention. It is a perspective view of the speaker apparatus in embodiment of this invention, (a) is the figure seen from diagonally front, (b) is the figure seen from diagonally back. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the internal structure of the speaker apparatus in embodiment of this invention, (a) is a top view, (b) is AA arrow sectional drawing of (a), (c) is (a) It is a BB arrow sectional drawing. It is a perspective view of a diaphragm in an embodiment of the present invention, (a) is a figure seen from slanting back, (b) is a figure seen from slanting front. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the structure of the diaphragm 10-05-2019 5 in embodiment of this invention, (a) is a top view, (b) is a side view, (c) is a bottom view, (d) is C-C of (a) It is arrow sectional drawing. It is a figure explaining the coupling structure of the bobbin and sub-bobbin in embodiment of this invention, (a) is the figure which couple ¦ bonded the bobbin and sub-bobbin, (b) is the figure which isolate ¦ separated the bobbin and sub-bobbin. It is sectional drawing which shows the structure of the conventional speaker apparatus. [0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [0021] FIG. 1 is an exploded view of the speaker device according to the embodiment of the present invention, and FIG. 2 is a perspective view of the speaker device according to the embodiment of the present invention. なお。 In FIG. 2, (a) is a view as viewed from diagonally front, and (b) is a view as viewed from diagonally rear. [0022] In the figure, reference numeral 10 denotes a speaker device according to the present embodiment, which is used by being attached to various audio devices such as a television receiver, a radio receiver, a personal computer, a CD player, a DVD player, a game machine, etc. Is an audio generator driven by the audio signal to reproduce the audio signal. 10-05-2019 6 Loudspeaker device 10 according to the present embodiment can be miniaturized, and thus, typically, a thin television receiver using a liquid crystal display, a plasma display, etc., a portable personal computer, a PDA (Personal Digital), etc. Assistant), used in thin or small electric devices such as portable game machines, etc., electronic devices, etc., but used in any parts of any kind of electric devices, electronic devices etc. of any size It may be done. [0023] In the present embodiment, expressions used to describe the configuration and operation of each part of the speaker device 10 and indicating directions such as upper, lower, left, right, front, and rear are not absolute ones. Although it is relative and is appropriate when the speaker device 10 or the component thereof is in the posture shown in the drawing, when the posture of the speaker device 10 or the component thereof changes, it is changed according to the change of the posture And should be interpreted. [0024] The speaker device 10 includes a driver unit 40 that reproduces an audio signal to generate a sound, a frame 31 as a holding member that holds the driver unit 40, the diaphragm unit 46, and the like, and the frame 31. And a housing 11 which is attached to the frame 31 so as to cover the rear of the frame 31 and which forms a housing with the frame 31. Although members such as the bobbin 44 and the sub-bobbin 51 are disposed on the rear surface of the diaphragm unit 46, the details of these members will be described later. The frame 31 is typically an integrally formed member made of a resin such as a synthetic resin, but may be made of a metal such as aluminum, steel, copper or the like, resin, carbon, etc. It may be made of a composite material in which a metal or the like is composited. The frame 31 has a front wall 32, a side wall 33, and an end wall 35. The front wall 32 is a bottom, and the rear ends of the side wall 33 and the end wall 35 are opened. It is a bottomed container-like member, and further has a driver unit housing 34. [0025] The front wall portion 32 is a flat (flat) plate-like member, and in the example shown in the figure, the outline of the projection plane with respect to the plane is shaped like an elongated rectangle, but the major axis It may be in the shape of an oval (elliptical circle), an oval or the 10-05-2019 7 like, and a short axis. In addition, although the outer shape of the projection plane with respect to the plane is also an elongated rectangular shape, the entire speaker device 10 may be an elliptical shape, an oval shape, or the like having a major axis and a minor axis. In other words, the dimensions in the width direction (short axis direction) of the speaker device 10 and the front wall 32 are shorter than the dimensions in the longitudinal direction (long axis direction). [0026] Further, in the front wall portion 32, a diaphragm accommodating opening 32a is formed as an opening which penetrates the front wall portion 32 in the thickness direction. The dimension of the inner peripheral edge of the diaphragm receiving opening 32a is slightly smaller than that of the outer peripheral edge of the diaphragm unit 46, and the vicinity of the outer peripheral edge of the flat diaphragm unit 46 is supported from the rear surface There is. In the example shown in the figure, the shape of the outer peripheral edge of the diaphragm unit 46 is such a shape that four corners of an elongated rectangle are cut off obliquely, and the shape of the inner peripheral edge of the diaphragm receiving opening 32a is a long axis and a short It is shaped like an ellipse or oval with an axis. [0027] The side wall portion 33 is an elongated rectangular plate member extending in the longitudinal direction of the front wall portion 32 so that each of a pair of long sides of the front wall portion 32 is orthogonal to the front wall portion 32. It is connected to the. Further, the end wall portion 35 is connected to each of longitudinal end portions of the front wall portion 32 and the side wall portion 33 so as to be orthogonal to the front wall portion 32 and the side wall portion 33. The front wall portion 32, the pair of side wall portions 33, and the pair of end wall portions 35 define an elongated rectangular parallelepiped shaped box-like space opened rearward. [0028] Further, the driver unit housing portion 34 is a substantially annular or cylindrical member, and the central axis thereof is orthogonal to the front wall portion 32, and the longitudinal center of the front wall portion 32, and It is disposed to be located substantially at the center of the diaphragm receiving opening 32a in the longitudinal direction. The driver unit accommodating portion 34, which is a substantially annular or cylindrical member, has an outer diameter 10-05-2019 8 substantially equal to the dimension in the width direction of the frame 31 and the front wall portion 32, and portions positioned at both ends in the width direction of the frame 31 are The pair of side wall portions 33 is formed to be integrated with a portion located substantially at the center in the longitudinal direction. The driver unit housing 34 functions as a casing for housing a driver unit 40 including a magnet 41 and the like described later. [0029] Further, one or more rod-like connecting members 36 are disposed on the side of the driver unit accommodating portion 34. Both ends of the connection member 36 are connected to the side wall portions 33, and play a role of improving the strength of the frame 31. In the rear surface of the front wall portion 32, one or more rib portions 36a extending in the width direction are integrally formed. Both ends of the rib portion 36a are connected to the side wall portions 33, and play a role of improving not only the strength of the front wall portion 32 but also the strength of the frame 31. The shape, size, and number of the connecting member 36 and the rib portion 36a can be set arbitrarily, and can be omitted as necessary. [0030] The end wall portion 35 has an attaching portion 35 a and an engaging portion 35 d. The engaging portion 35 d is a portion engaged with the engaging portion 15 a of the end wall portion 15 of the housing 11 and is a recess formed in the end wall portion 35. Further, the mounting portion 35a is parallel to the front wall portion 32, and a fixing plate portion 35b extending outward in the longitudinal direction of the frame 31 from the end wall portion 35, and a mounting formed on the fixing plate portion 35b. And an opening 35c. The fixing plate portion 35 b is a portion that contacts a speaker fixing member (not shown) provided in an electric device, an electronic device or the like to which the speaker device 10 is attached. Further, the mounting opening 35c is a portion through which a fixing member such as a bolt or a screw is inserted. The shape and size of the mounting portion 35a are appropriately changed in accordance with the shape and size of the portion on which the speaker device 10 is mounted in a housing such as an electric device or an electronic device. For example, the diameter of the mounting opening 35c is changed according to the outer diameter of the fixing member such as a bolt or a screw. Furthermore, the dimension in the front-rear direction of the attachment portion 35a is changed according to the position of the speaker fixing member provided in the electric device, the electronic device, and the like. 10-05-2019 9 [0031] The housing 11 is typically an integrally formed member made of resin such as synthetic resin, but may be made of metal such as aluminum, steel, copper, etc., resin, It may be made of a composite material in which carbon, metal and the like are combined. The housing 11 has a side wall 12, a rear wall 13 and an end wall 15, with the rear wall 13 as a bottom, and the front ends of the side wall 12 and the end wall 15 are open. It is a container-like member, and further has a driver unit corresponding opening 13 a formed in the rear wall 13. [0032] The rear wall portion 13 is a flat plate-like member, but the shape and size of the outline of the projection plane with respect to a plane are substantially the same as the front wall portion 32 of the frame 31 and a shape like an elongated rectangle Or, it has an oval, oval, etc. shape having a major axis and a minor axis. [0033] As described above, it is desirable to set the shape of the housing 11 and the dimensions in the longitudinal direction and the width direction, as well as the shapes of the frame 31 and the front wall portion 32 and the dimensions in the longitudinal direction and the width direction. As a result, the space for mounting the speaker device 10 in the interior of an electric device, an electronic device, etc. is narrow, and the housing 11 is attached to the frame 31 even if there is no margin over the dimensions of the frame 31 in the vertical and horizontal directions. It becomes possible to use. [0034] Further, the driver unit corresponding opening 13a is an opening having a substantially circular cross section, and the central axis thereof is orthogonal to the rear wall 13 and located substantially at the center of the rear wall 13 in the longitudinal direction. Arranged as. The inner diameter of the driver unit corresponding opening 13a is substantially equal to the outer diameter of the driver unit 40, and functions as a vent for exposing the rear end surface of the driver unit 40 to the outside and contacting the outside air. 10-05-2019 10 [0035] Further, the side wall portion 12 is an elongated rectangular plate member extending in the longitudinal direction of the rear wall portion 13 so that each of a pair of long sides of the rear wall portion 13 is orthogonal to the rear wall portion 13 It is connected to the. The dimension in the front-rear direction of the side wall portion 12 is set smaller than the dimension in the frontrear direction of the side wall portion 33 of the frame 31. Furthermore, the end wall portion 15 is connected to each of longitudinal end portions of the rear wall portion 13 and the side wall portion 12 so as to be orthogonal to the rear wall portion 13 and the side wall portion 12. The rear wall portion 13, the pair of side wall portions 12 and the pair of end wall portions 15 define an elongated rectangular parallelepiped shaped forwardly open shallow box-like space. [0036] The end wall portion 15 has an engaging portion 15a and a sound quality adjustment hole 15b. The engaging portion 15 a is a portion engaged with the engaging portion 35 d of the end wall portion 35 of the frame 31, and is a convex portion formed on the end wall portion 15. Further, the sound quality adjustment hole 15b is an opening opened to the end wall portion 15, and is connected to a communication passage 15c described later. [0037] Then, as shown in FIG. 2, the housing 11 brings the front ends of the side wall 12 and the end wall 15 into contact with the rear ends of the side wall 33 and the end wall 35 of the frame 31, as shown in FIG. It is combined with the frame 31. As a result, a housing including a closed space in which the driver unit 40 is accommodated is formed. Since the space communicates with the outside air through the sound quality adjustment hole 15b and the communication passage 15c, various adjustments can be made by adjusting the length, cross sectional shape, size of the cross section, etc. of the sound quality adjustment hole 15b and the communication passage 15c. The sound pressure in the frequency band can be controlled. The rear end surface of the driver unit 40 is exposed to the outside through the driver unit corresponding opening 13a. [0038] 10-05-2019 11 Next, the internal structure of the speaker device 10 will be described. [0039] 3 is a view for explaining the internal structure of the speaker device in the embodiment of the present invention, FIG. 4 is a perspective view of the diaphragm in the embodiment of the present invention, and FIG. 5 is a structure of the diaphragm in the embodiment of the present invention FIG. 6 is a view for explaining the connection structure of the bobbin and the subbobbin in the embodiment of the present invention. In FIG. 3, (a) is a top view, (b) is a cross-sectional view taken along the line AA in (a), and (c) is a cross-sectional view taken along the line BB in (a). (A) is a view from diagonally rear, (b) is a view from diagonally front, in FIG. 5, (a) is a top view, (b) is a side view, (c) is a bottom view, (D) is a cross-sectional view taken along the line C-C in (a). In FIG. 6, (a) is a view in which the bobbin and the sub-bobbin are connected, and (b) is a view in which the bobbin and the sub-bobbin are separated. [0040] As shown in the figure, the driver unit 40 has a cylindrical unit case 40a with a bottom, and a magnet 41 as a magnet housed in the unit case 40a, a plate 42, a coil 43 as a voice coil, vibration It has a bobbin 44 as a transmission member, a sub-bobbin 51 as a vibration transmission auxiliary member, and a cord 52 as an electric wire. [0041] The magnet 41 is a permanent magnet made of a material having a high coercive force, and is a member having a substantially cylindrical shape. The rear surface of the magnet 41 is in contact with the inner surface of the bottom plate of the unit case 40a, that is, the front surface. The unit case 40 a functions as a casing for housing the magnet 41 and also functions as a heat dissipation member for dissipating heat of the driver unit 40 and also functions as a yoke for forming a magnetic path together with the magnet 41. . Therefore, it is desirable that the unit case 40a be made of, for example, a material having high thermal conductivity such as soft iron and high permeability. 10-05-2019 12 [0042] The plate 42 is a member that functions as a yoke that forms a magnetic path, and is made of, for example, a high permeability material such as soft iron. The plate 42 is a plate member having a disk-like shape, and its rear surface is in contact with the front surface of the magnet 41. [0043] Furthermore, the coil 43 is, for example, a member formed by winding a conducting wire made of a highly conductive material such as copper around the outer peripheral surface of the rear end of the cylindrical bobbin 44 extending in the front-rear direction. Function as a driving member. The coil 43 has a thin-walled cylindrical shape as a whole, and in the gap between the inner surface of the cylindrical portion of the unit case 40a and the outer surface of the plate 42, that is, in the gap, It is arranged to be movable in the direction. [0044] Further, the bobbin 44 extends forward from the front end of the coil 43, and a sub-bobbin 51 is attached to the front end. The front end edge of the bobbin 44 and the front end edge of the subbobbin 51 are in contact with the rear surface of the diaphragm 45 of the diaphragm unit 46 and are fixed, for example, by an adhesive or the like. The cord 52 is an electric wire for transmitting an audio signal which is an electric signal to the coil 43, one end not shown is connected to the cord 52, and the other end is another cord to an audio signal generating device such as an amplifier not shown. Connected through. As shown in FIG. 3 (b), it is desirable that the cord 52 be held by the connecting member 36 of the frame 31 at the middle part. [0045] In the present embodiment, the diaphragm unit 46 is a flat member as a whole, and has a shape in which four corners of an elongated rectangle are cut off obliquely. Further, the diaphragm unit 46 has a diaphragm 45 in the form of a flat plate as a whole and a diaphragm edge portion 47 connected to the outer periphery of the diaphragm 45. In the example shown in the figure, the 10-05-2019 13 shape of the outer peripheral edge of the diaphragm 45 is an oval or oval shape having a major axis and a minor axis, and the shape of the inner peripheral edge of the diaphragm edge portion 47 is The shape of the outer peripheral edge of the diaphragm edge part 47 is the same as the shape of the outer peripheral edge of the diaphragm 45, such that the four corners of a long and thin rectangle are cut off obliquely. [0046] And although the said diaphragm 45 is flat form as a whole, in order to improve rigidity, the unevenness ¦ corrugation is provided. In the example shown in the drawing, a convex portion 45 a that protrudes forward is formed. The planar shape of the convex portion 45 a is shaped like an oval or oval ring having a major axis and a minor axis so as to conform to the shape of the outer peripheral edge of the diaphragm 45. Further, a portion adjacent to the convex portion 45a is a recessed portion 45b which is relatively recessed. The concave portion 45b is divided by the convex portion 45a into a first concave portion 45b1 and a second concave portion 45b2 positioned on the inner side and the outer side of the convex portion 45a. [0047] In the example shown in the figure, the convex portion 45a is singular but may be plural. For example, it can be formed to draw double to triple or more multiple rings. In this case, the concave portion 45 b is further divided into a large number by the plurality of convex portions 45 a. When viewed from the rear, the recessed portion 45b is a portion protruding rearward, that is, a rear convex portion, and a portion in which the convex portion 45a is relatively recessed, that is, a rear recessed portion. [0048] In addition, although the diaphragm edge portion 47 also has a flat shape as a whole, in order to enhance the flexibility, a thin curved portion 47a which is easily deformed is formed. In the example shown in the figure, the curved portion 47a is formed to project forward, but may be formed to be recessed, that is, project rearward. The planar shape of the curved portion 47a is shaped like an oval or oval ring having a major axis and a minor axis so as to conform to the shape of the inner peripheral edge of the diaphragm edge portion 47. Further, in the example shown in the drawings, the bending portion 47a is singular but may be plural. For example, it can 10-05-2019 14 be formed to draw double to triple or more multiple rings. [0049] A gasket portion 47 b as an attachment portion is connected to the outer periphery of the curved portion 47 a in the diaphragm edge portion 47. The gasket portion 47b has an oval or oval shape whose inner peripheral edge has the same shape as the outer peripheral edge of the curved portion 47a, but the outer peripheral edge has a shape in which four corners of an elongated rectangle are cut off obliquely It is. The gasket portion 47 b is made of, for example, a material having flexibility such as EVA (ethylene-vinyl acetate copolymer resin), and the rear surface thereof is the diaphragm housing opening 32 a formed in the front wall portion 32 of the frame 31. It is fixed by adhesive or the like around the inner peripheral edge and attached. Thereby, the diaphragm 45 is held by the front wall 32 of the frame 31 without being disturbed. [0050] In the present embodiment, as shown in the figure, the sub-bobbin 51 is a tubular member having an oval or oval ring-like shape with a cross-sectional shape having a major axis and a minor axis, and is linear and parallel to each other And a corner portion 51b connecting both ends of the straight portion 51a. The sub-bobbin 51 can be formed, for example, by bending an elongated strip plate member into a ring and connecting both ends to each other. [0051] Further, as shown in FIG. 6B, a plurality of (for example, four) cuts 44a are formed at the front end of the bobbin 44, and the straight portion 51a of the sub-bobbin 51 is inserted into the cuts 44a. The depth of the cut 44 a from the front end edge of the bobbin 44 substantially matches the dimension in the front-rear direction of the sub-bobbin 51. Thus, with the sub-bobbin 51 attached to the bobbin 44, the front end edge of the bobbin 44 and the front end edge of the subbobbin 51 become flush. The bobbin 44 and the sub-bobbin 51 are fixed to each other by an adhesive or the like. [0052] 10-05-2019 15 Since the front end edge of the bobbin 44 and the front end edge of the sub-bobbin 51 assembled in this way are in contact with and fixed to the rear surface of the diaphragm 45 of the diaphragm unit 46, the vibration of the coil 43 passes through the bobbin 44 and the subbobbin 51. And transmitted to the diaphragm 45. Specifically, the front end edge of the bobbin 44 and the front end edge of the sub-bobbin 51 abut on the rear surface of the recess 45 b which is a portion projecting rearward, and are fixed by an adhesive or the like. A portion of the front end edge of the bobbin 44 and the front end edge of the sub-bobbin 51 corresponding to the rear surface of the convex portion 45 a is not in contact with the diaphragm 45 and is not fixed. [0053] Further, the dimension in the width direction of the sub-bobbin 51, that is, the distance between the pair of opposing straight portions 51a is opposite in the second concave portion 45b2 shaped like an oval or oval ring having a major axis and a minor axis. It is set to be substantially equal to the distance between the pair of linear portions. As a result, the entire front end edge of the straight portion 51a of the sub-bobbin 51 abuts on and is fixed to the rear surface of the linear portion of the second recess 45b2. Therefore, the sub-bobbin 51 abuts on and is fixed to the diaphragm 45 over the wide range of the diaphragm 45, and the vibration is transmitted to the wide range of the diaphragm 45. [0054] Further, in the portion where the corner portion 51b of the sub-bobbin 51 abuts and is fixed to the rear surface of the first recess 45b1, the portion of the diaphragm 45 is fixed more than the portion where the bobbin 44 is abutted and fixed to the rear Away from the longitudinal center. Therefore, the sub-bobbin 51 abuts on and is fixed to the diaphragm 45 over the wide range of the diaphragm 45, and the vibration is transmitted to the wide range of the diaphragm 45. [0055] As shown in FIG. 5C, the diameter of the bobbin 44 which is a cylindrical member is D, the dimension in the longitudinal direction of the sub-bobbin 51 which is an elongated member is l, and the diaphragm 45 which is an elongated plate member is Assuming that the longitudinal dimension is L, the value of l is typically l 典型 2D, and L / 3 ≦ l ≦ L / 2. 10-05-2019 16 [0056] If it is attempted to transmit vibration to a wide range of the diaphragm 45 which is an elongated plate-like member without using the sub-bobbin 51, two driver units 40 each including the bobbin 44 are arranged in the longitudinal direction of the diaphragm 45. It is conceivable to arrange them side by side. In this case, it is considered that the respective bobbins 44 or the driver units 40 are disposed at positions where they are equally divided in the longitudinal direction of the diaphragm 45. That is, the distance between the centers of two adjacent bobbins 44 is about L / 3, and the distance between the distal ends of the two adjacent bobbins 44 is about L / 3 + D. [0057] Therefore, assuming that L / 3 ≦ l ≦ L / 2, vibration is applied to the diaphragm 45 over the same range as when two driver units 40 not provided with the sub bobbin 51 are arranged side by side by the sub bobbin 51. It can be said that it can be transmitted. [0058] Furthermore, the sub-bobbin 51 is a tubular member having an oval or oval cross-sectional shape as described above, that is, a member having a closed cross-section. Therefore, since the rigidity of the entire sub-bobbin 51 is high, the vibration is faithfully transmitted to a wide range of the diaphragm 45. [0059] Further, as shown in FIG. 3B, the rear wall 13 of the housing 11 is formed with a pair of communication passages 15c extending in the longitudinal direction of the rear wall 13. One end of the communication passage 15 c is connected to the tone control hole 15 b of the end wall portion 15, and the other end is in communication with a closed space formed between the housing 11 and the frame 31. Therefore, the sound pressure in various frequency bands can be controlled by adjusting the length, cross sectional shape, size of the cross section, etc. of the 10-05-2019 17 sound quality adjustment hole 15 b and the communication passage 15 c. As a result, even if the space between the housing 11 and the frame 31 as a closed enclosure, that is, the volume of the space functioning as an acoustic space is small, the performance of the speaker device 10 is sufficiently exhibited in a desired frequency band. be able to. [0060] Furthermore, the rear end surface of the unit case 40a is exposed to the outside through the driver unit corresponding opening 13a. Therefore, the heat generated by the driver unit 40 can be efficiently released from the rear end surface of the unit case 40a, so that the speaker device 10, particularly the driver unit 40, can be prevented from being overheated. [0061] As described above, in the present embodiment, the speaker device 10 includes the flat diaphragm 45 and the driver unit 40 that vibrates the diaphragm 45. The diaphragm 45 has a narrow and elongated planar shape. The driver unit 40 includes a coil 43 generating vibration, a bobbin 44 transmitting the vibration of the coil 43 to the diaphragm 45, and a sub-bobbin 51 attached to the bobbin 44. The bobbin 44 is a rear surface of the diaphragm 45 The sub-bobbin 51 abuts on the rear surface of the diaphragm 45 over a range wider than the bobbin 44 in the longitudinal direction of the diaphragm 45. [0062] Thereby, since the vibration generated by the coil 43 can be effectively transmitted to the entire diaphragm 45, the depth dimension of the speaker device 10 can be reduced, and even if the narrow and narrow front shape is adopted, the width direction can be obtained. Can be controlled, sound pressure can be controlled in a wide frequency band, sharp bass and clear medium / high tone can be reproduced, sound reproducibility is good, and the speaker is high in sound quality An apparatus 10 can be provided. [0063] Further, the diaphragm 45 is provided with a recess 45 b that protrudes rearward, and the front end edge of the bobbin 44 and the front end edge of the sub bobbin 51 abut on the rear surface of the recess 45 b. 10-05-2019 18 Thereby, the vibration of the coil 43 is faithfully transmitted to the diaphragm 45 via the bobbin 44 and the sub-bobbin 51. [0064] Furthermore, the bobbin 44 is a cylindrical member extending forward from the front end of the coil 43, and the sub-bobbin 51 is a member having a closed cross-section attached to the front end of the bobbin 44. As a result, the rigidity of the bobbin 44 and the sub-bobbin 51 is enhanced, and the vibration of the coil 43 is faithfully transmitted to the diaphragm 45. In addition, rolling of the bobbin 44 and the coil 43 can be prevented. [0065] Further, the sub-bobbin 51 is a cylindrical member including flat straight portions 51a linearly extending parallel to one another and corner portions 51b respectively connecting both ends of the straight portion 51a, and the concave portions 45b are a pair of straight lines And the entire front end edge of the straight portion 51a abuts on the rear surface of the straight portion. Therefore, the sub-bobbin 51 abuts on and is fixed to the diaphragm 45 over the wide range of the diaphragm 45, and the vibration is transmitted to the wide range of the diaphragm 45. [0066] Further, the dimension in the longitudinal direction of the sub-bobbin 51 is 1/3 to 1/2 of the dimension in the longitudinal direction of the diaphragm 45. Thus, the vibration can be transmitted to the diaphragm 45 over the same range as in the case where two driver units 40 not having the sub-bobbin 51 are arranged side by side. [0067] The present invention is not limited to the above-described embodiment, and can be variously modified based on the spirit of the present invention, and they are not excluded from the scope 10-05-2019 19 of the present invention. [0068] The present invention can be applied to a speaker device. [0069] DESCRIPTION OF SYMBOLS 10 Speaker apparatus 11 Housing 12, 33 Side wall part 13 Back wall part 13a Driver unit corresponding ¦ compatible opening part 15, 35 End wall part 15a, 35d Engaging part 15b Sound quality adjustment hole 15c Communication path 31, 831 Frame 32 Front wall part 32a Diaphragm Housing opening 34 Driver unit housing 35a Mounting portion 35b Fixing plate 35c Mounting opening 36 Connection member 36a Rib 40 Driver unit 40a Unit case 41, 841 Magnet 42 Plate 43 Coil 44, 844 Bobbin 44a Notch 45, 846 Diaphragm 45a Convex part 45b Concave part 45b1 First concave part 45b2 Second concave part 46 Diaphragm unit 47, 847 Diaphragm edge part 47a Curved part 47b Gasket part 51 Sub-bobbin 51a Straight part 51b Corner part 52 Code 837 Basket 842a bottom plate 842b top plate 842c center-Pol843 voice coil 848 damper 851 drive cone 10-05-2019 20
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