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 JPH10191496 [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic transparent speaker, and more particularly to an electrostatic transparent speaker used by being attached to the front of a display such as a CRT, LCD, or PDP, or a poster or a picture. It is. [0002] 2. Description of the Related Art FIG. 12 is a cross-sectional view showing a conventional electrostatic speaker that is not an electrostatic transparent speaker. In the figure, 1 is a transparent diaphragm, 2 is an electrode film formed on the diaphragm 1, 3 is a fixed plate disposed facing the diaphragm 1, and 5 is a diaphragm that separates the diaphragm 1 from the fixed plate 3. Insulating spacer frame, and the diaphragm 1 is stretched with a constant tension. Further, 6 is an air vent hole formed in the diaphragm 3 and formed so as not to disturb the vibration of the diaphragm 1, and in practice it is formed using a punching metal or the like as the fixed plate 3 It is a thing. Further, reference numeral 8 is a sound absorbing material, which is configured to prevent the generation of the sound entering and exiting the air vent 6 and for the air to be released to the outside. The insulating spacer frame 5 on which the diaphragm 1 is stretched and the fixing plate 3 provided with the air vent holes 6 are fastened by screws or the like, but they are attached using a bonding material to constitute an electrostatic type speaker. ing. 04-05-2019 1 [0003] Next, the operation will be described. By applying a constant DC voltage between the diaphragm 1 and the fixed electrode plate 3 and superimposing an acoustoelectric signal, the diaphragm 1 is displaced in the direction of the fixed electrode 3 by the Coulomb force. Thus, the force received by the diaphragm 1 changes due to the fluctuation of the acoustoelectric signal, and the diaphragm 1 vibrates in accordance with the received force to generate the sound wave 12. [0004] FIG. 13 shows the cross-sectional structure of the conventional electrostatic transparent speaker disclosed in Japanese Patent Application Laid-Open No. 59-105800. In the figure, 1 is a transparent diaphragm, 2 is a transparent electrode film formed on the transparent diaphragm 1, 3 is a transparent fixed electrode plate, 4 is a transparent electrode film formed on the fixed electrode plate 3, 5 is an insulation A spacer 11 is a transparent perforated pressing plate in which a sonic radiation hole 14 is formed. The transparent diaphragm 1 is tensioned by fastening the perforated pressing plate 11 to the fixed electrode plate 3 together with the insulating spacer with a screw. For this reason, when the transparent diaphragm 11 vibrates, the sound wave 12 is emitted through the sound wave emitting hole 14 formed in the hole holding plate 11. In the present invention, the transparent diaphragm 3 and the perforated pressing plate 11 and the like constitute a transparent electrostatic speaker using glass or a transparent plastic material. [0005] By the way, in recent years, it has been proposed that an electrostatic speaker be attached to the front of a display such as a CRT, an LCD, a PDP, a poster, a picture, etc. Actually, such use has not been made yet.) As shown in FIG. 13, the diaphragm 1, the fixed plate 4 and the hole pressing plate 11 are made of transparent members. However, in the conventional electrostatic speaker shown in FIG. 12 and FIG. 13 described above, since the fixed electrode 3 seen from the front, the holding plate 11 and the like have been bored with holes for air removal and sound wave emission When the main speaker is viewed from the front, the outline of the hole is visible because the refractive index of light is different between the material and the air, even if the material is used, the image of the display on the back of the main speaker or a picture The problem is that it affects the viewer, makes the viewer uncomfortable, and looks bad. 04-05-2019 2 [0006] Further, in the conventional electrostatic transparent speaker shown in FIG. 13, the transparent electrode film 2 formed on the diaphragm 1, the transparent electrode film 4 formed on the fixed electrode plate 3, and the insulating spacer frame 5 And the air in the closed space 13 is vibrated, the pressure in the closed space 13 prevents the vibration of the transparent diaphragm 1, and the sound is small. There was also a problem that the output efficiency was poor. [0007] Therefore, the present invention has been made to solve such a problem, and even when it is used by being attached to the front of a display, a picture, etc., it does not affect the image on the rear side, and it is possible for viewers. An object of the present invention is to provide an electrostatic transparent speaker which does not give a sense of discomfort and which has high output efficiency. [0008] [Means for Solving the Problems] In order to achieve the above object, in the present invention, a transparent diaphragm on which a transparent electrode film is formed, and a transparent fixing on which a transparent electrode film opposed to the transparent diaphragm is formed And an insulating spacer frame provided between the transparent diaphragm and the transparent fixing plate to form a closed space together with the transparent diaphragm and the transparent fixing plate, and the transparent diaphragm and the insulating member from the outside In the electrostatic type transparent speaker in which the opposite side can be seen through the transmission area of the transparent fixing plate, it becomes the outside of the extension line extended onto the transparent fixing plate from the end of the transmission area of the transparent diaphragm in the closed space. An air vent hole is provided at a position for drawing air out of the closed space. [0009] In the next invention, a support frame is further provided in which a transparent diaphragm is stretched at a position facing the insulating spacer frame via the transparent diaphragm on the front surface of the transparent diaphragm. [0010] Further, in the next invention, the air vent holes are provided on the side surface of the insulating spacer frame. 04-05-2019 3 [0011] In the next invention, the cross-sectional shape of the insulating spacer frame is such that the transmission region side end of the contact surface with the transparent diaphragm is formed inside the transmission region side end of the contact surface with the transparent fixing plate An air vent is provided at a position on the transparent fixing plate outside the extension line extended on the transparent fixing plate from the transmission region side end of the contact surface with the transparent diaphragm of the insulating spacer frame. It is [0012] In the next invention, the width of the support frame from the end of the transparent diaphragm to the direction of the transmission region is larger than the width of the insulating spacer frame from the end of the transparent diaphragm to the direction of the transmission region. The support frame and the insulating spacer are formed, and an air vent hole is provided at a position on the transparent fixing plate which is the outside of the extension line extended from the transmission region side end of the support frame to the transparent fixing plate. It is [0013] Further, in the next invention, the insulating spacer frame forms an air leak hole by combining a plurality of divided insulating spacers with a gap, and the width of the supporting frame is the above-mentioned insulating spacer It is more than the width of the frame. [0014] DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 shows a cross-sectional structure of Embodiment 1 of the electrostatic transparent speaker according to the present invention. In the figure, 1 is a transparent diaphragm, 2 is a transparent electrode film formed on the diaphragm 1, 3 is a transparent fixed plate, 4 is a transparent electrode film formed on the fixed electrode plate 3, 5a is a transparent diaphragm 1 And an insulating spacer frame which is provided between the transparent fixing plate 3 and the transparent diaphragm 1 and the transparent fixing plate 3 to form a closed space 13; 6 is an air escape hole formed on the side surface of the insulating spacer frame 5a; Is a sound absorbing material. 04-05-2019 4 In the first embodiment, the transparent diaphragm 1 is stretched by the insulating spacer frame 5a with a constant tension. The insulating spacer frame 5a is not made of a transparent member, and the transparent electrode film 1 and the transparent fixing plate 3 are formed by the opening of the insulating spacer frame 5a. [0015] FIG. 2 shows a perspective view of insulating spacer frame 5a of the first embodiment shown in FIG. As shown in this figure, a plurality of circular air vents 6 are formed at predetermined intervals on the side surface of the insulating spacer frame 5a. [0016] Next, to describe the operation, when an acoustoelectric signal is applied between the transparent electrode film 2 and the transparent electrode film 4, the transparent diaphragm 1 provided with the transparent electrode film 2 vibrates due to the fluctuation of the voltage. , Sound waves 12 are generated. At that time, the air in the closed space 13 goes to the sound absorbing material 8 through the air vent holes 6 formed on the side surfaces of the insulating spacer frame 5 a, and escapes from the sound absorbing material 8 to the outside of the closed space 13. For this reason, the output efficiency of the sound wave 12 does not deteriorate. Also, when looking from the front of the external of the present speaker through the transmission region of the transparent electrode film 1 and the transparent fixed plate 3 and 04-05-2019 5 looking to the rear of the present speaker, the air vents 6 are formed on the side surfaces of the insulating spacer frame 5a. The through hole 6 is provided in the closed space 13 outside the extension line vertically extended on the transparent fixing plate 3 from the end of the transmission region of the transparent diaphragm 1, and can hardly be seen from the front. [0017] Therefore, according to the electrostatic transparent speaker of the first embodiment, the output efficiency of the present speaker is not impaired, and the transparent diaphragm 2 and the transparent fixing plate 4 are viewed through the transmission region from the outside even when the opposite side is viewed. Since the air holes 6 are hardly visible, even if the device is mounted on the front of a display, a picture, etc., it does not affect the image on the rear side, nor does it cause discomfort to the viewer. . [0018] Second Embodiment FIG. 3 shows a perspective view of the main part of the second embodiment of the electrostatic transparent speaker according to the present invention. In this figure, the transparent electrode film, the sound absorbing material, etc. are omitted and only the configuration of the main part of the second embodiment is shown, 1 is a transparent diaphragm, 3 is a transparent fixed plate, 5b is transparent with the transparent diaphragm 1 It is an insulating spacer frame provided between the fixed plate 3 and forming a closed space 13 together with the transparent diaphragm 1 and the transparent fixed plate 3, and stretching the transparent diaphragm 1. This insulating spacer frame 5 b A plurality of semicircular grooves 9 are provided at predetermined intervals on the transparent fixing plate 3 side, and an air leakage hole is formed between the grooves 9 and the surface of the transparent fixing plate 3. [0019] Therefore, according to the electrostatic transparent speaker of the second embodiment, as in the case of the first embodiment, the air vent holes are provided on the side surfaces of the insulating spacer frame 5b. As in the first aspect, the output efficiency is not impaired, and even if the apparatus is attached to the front of a display, a picture, etc., it does not affect the image on the rear side, and the viewer feels uncomfortable. I will not give it. 04-05-2019 6 [0020] In the second embodiment, a plurality of semicircular grooves 9 are provided at predetermined intervals on the transparent fixing plate 3 side of the insulating spacer frame 5b. However, in the present invention, the semicircular grooves 9 are used. Of course, the grooves 9 may be provided on the transparent diaphragm 1 side of the insulating spacer frame 5b. [0021] Third Embodiment In FIG. 4, sectional drawing of the principal part of Embodiment 3 of the electrostatic-type transparent speaker which concerns on this invention is shown. In this figure, the transparent electrode film, the sound absorbing material, etc. are omitted and only the cross section of the main part of Embodiment 3 is shown, 1 is a transparent diaphragm, 3a is a transparent fixed plate, 5c is a transparent diaphragm 1 and transparent An insulating spacer frame provided between the fixed plate 3a and forming the closed space 13 together with the transparent diaphragm 1 and the transparent fixed plate 3a and stretching the transparent diaphragm 1, this insulating spacer frame 5c The cross-sectional shape is formed in an L-shape in which the transmission region side end of the contact surface with the transparent diaphragm 1 is formed inside the transmission region side end of the contact surface with the transparent fixing plate 3a. Then, the transparent fixing plate 3a is a transparent fixing plate that is the outside of the extended line vertically extended on the transparent fixing plate 3a from the transmission region side end of the contact surface of the insulating spacer frame 5c with the transparent diaphragm 1 When the main speaker is viewed from the front, the air vent hole 6 is provided at a position hidden by the L-shaped insulating spacer frame 5c. [0022] Therefore, according to the electrostatic type transparent speaker of the third embodiment, when the opposite side of the transparent diaphragm 1 and the transparent fixing plate 3 is seen from the front of the present speaker, the air vent hole 6 is an insulating spacer. Since the display is hidden by the frame 5c and disappears, the output efficiency is not impaired as in the case of the first and second embodiments, and the image on the rear side is used even if the apparatus is attached to the front of a display, a picture, etc. There is no impact on the viewer and no discomfort to the viewer. 04-05-2019 7 [0023] In the third embodiment, the cross-sectional shape of insulating spacer frame 5c is described as being formed in the L-shape described above, but in the present invention, the cross-sectional shape of insulating spacer frame 5c is L-shaped. There is no limitation, and the cross-sectional shape of the insulating spacer frame 5c is such that the transmission region side end of the contact surface with the transparent diaphragm 1 is inside the transmission region side end of the contact surface with the transparent fixing plate 3a. It is sufficient if it is formed, for example, it may be formed in a wedge shape or the like as the insulating spacer frame 5d shown in FIG. [0024] Fourth Embodiment In FIG. 6, sectional drawing of the principal part of Embodiment 4 of the electrostatic-type transparent speaker which concerns on this invention is shown. In this figure, the transparent electrode film, the sound absorbing material, etc. are omitted and only the cross section of the main part of the fourth embodiment is shown, 1 is a transparent diaphragm, 3 is a transparent fixed plate, 5 e is a transparent diaphragm 1 and transparent An insulating spacer frame provided between the fixing plate 3 and the transparent diaphragm 1 and the transparent fixing plate 3 to form a closed space 13; 6 is an air vent hole formed on the side surface of the insulating spacer frame 5e; 7 is transparent It is a support frame provided so as to face the insulating spacer frame 5 e via the diaphragm 1 and for stretching the transparent diaphragm 1. [0025] Therefore, according to the electrostatic transparent speaker of the fourth embodiment, as in the case of the first embodiment, since the air vent holes 6 are formed on the side surfaces of the insulating spacer frame 5e, the output efficiency can be improved. Not to lose, and even when used by attaching the device to the front of a display or a picture, it does not affect the image on the rear side, nor does it cause discomfort to the viewer. [0026] 04-05-2019 8 Embodiment 5 FIG. 7 shows a cross-sectional view of the main part of the fifth embodiment of the electrostatic transparent speaker according to the present invention. In this figure, the transparent electrode film, the sound absorbing material, etc. are omitted and only the cross section of the main part of the fifth embodiment is shown, 1 is a transparent diaphragm, 3 is a transparent fixing plate, 5f is an insulating spacer frame, A plurality of grooves 9 are formed in the insulating spacer frame 5f, and 7 is a support frame on which the transparent diaphragm 1 is stretched. The support frame 7 is not made of a transparent member like the insulating spacer frame 5f. [0027] Therefore, according to the electrostatic transparent speaker of the fifth embodiment, as in the case of the second embodiment, the air leakage hole is formed between the groove 9 of the insulating spacer frame 5 f and the surface of the transparent fixing plate 3. In addition, since the air vents are not visible from the front, the output efficiency is not impaired as in the first to fourth embodiments, and the apparatus is attached to the front of a display, a picture, etc. Even if used, it does not affect the image on the back side, nor does it cause discomfort to the viewer. [0028] In the fifth embodiment, a plurality of grooves 9 are provided at predetermined intervals on the transparent fixing plate 3 side of the insulating spacer frame 5f, but in the present invention, the transparent diaphragm 1 of the insulating spacer frame 5f is used. The grooves 9 may be provided on the side, and as shown in FIG. 8, the grooves 9 are provided on both sides of the insulating spacer frame 5 g on the transparent fixed plate 3 side and the transparent diaphragm 1 side. Also good. [0029] Sixth Embodiment FIG. 9 shows a cross-sectional view of the main part of the electrostatic transparent speaker according to the present invention. 04-05-2019 9 In this figure, the transparent electrode film, the sound absorbing material, etc. are omitted and only the cross section of the main part of the sixth embodiment is shown, 1 is a transparent diaphragm, 3b is a transparent fixed plate, 5h is a transparent diaphragm 1 and transparent An insulating spacer frame provided between the fixing plate 3 b and the transparent diaphragm 1 and the transparent fixing plate 3 b to form a closed space 13, and 7 is a supporting frame on which the transparent diaphragm 1 is stretched. In the sixth embodiment, the width of the support frame 7 from the end of the transparent diaphragm 1 to the direction of the transmission region is the width of the insulating spacer frame 5 h from the end of the transparent diaphragm 1 to the direction of the transmission region In order to be larger, that is, the opening area surrounded and formed inside the support frame 7 has a width smaller than the opening area similarly formed inside the insulating spacer frame 5 h, In the transparent fixing plate 3a, the transparent diaphragm 1 and the transparent fixing plate are positioned from the end on the transmission region side of the support frame 7 to the outside of the extended line extending vertically on the transparent fixing plate 3a An air vent 6 is formed at a position hidden by the support frame 7 when the transmission area 3a is viewed. [0030] Therefore, according to the electrostatic transparent speaker of the sixth embodiment, even when the transparent diaphragm 1 and the transparent fixing plate 3a are viewed from the front of the outside of the present speaker, the air vent holes 6 are hidden by the support frame 7 and can not be seen Therefore, as in the first to fifth embodiments, the output efficiency is not impaired, and even if the apparatus is attached to the front of a display, a picture, etc., it does not affect the image on the rear side. There is no discomfort to the viewer. [0031] Embodiment 7 FIG. 10 is a perspective view of the main part of the seventh embodiment of the electrostatic transparent speaker according to the present invention. In this figure, the transparent electrode film, the sound absorbing material and the like are omitted and only the cross section of the main part of the seventh embodiment is shown, 1 is a transparent diaphragm, 3 is a transparent fixing plate, and 5i is divided into four. Insulating spacer, both ends of which are shorter than the length and width of the transparent fixing plate 3 and obliquely cut inward and disposed on the four sides of the transparent fixing plate 3 so as to be transparent fixed It is provided so as to constitute an insulating spacer frame in which gaps 10 are formed at the four corners of the plate 3 respectively. Reference numeral 7 denotes a support frame having a width of at least the 04-05-2019 10 width of the insulating spacer 5i, which is provided so as to face the insulating spacer 5i via the transparent diaphragm 1, and the transparent diaphragm 1 is stretched. It is. Therefore, in the seventh embodiment, the gap 10 formed by the transparent diaphragm 1, the insulating spacer 5i and the transparent fixing plate 3 at the four corners of the transparent fixing plate 3 acts as an air vent, and the upper side thereof is It will be covered by the support frame 7 wider than the insulating spacer 5i. [0032] Therefore, according to the electrostatic type transparent speaker of the seventh embodiment, even when the transparent diaphragm 1 and the transparent fixing plate 3 are viewed from the front of the outside of the present speaker, the gap 10 serving as an air vent is hidden by the support frame 7 In the same way as in the first to sixth embodiments, the output efficiency is not impaired, and even if the apparatus is attached to the front of a display, a picture, etc., it affects the image on the rear side. There is no giving and no discomfort for the viewer. [0033] In the seventh embodiment, the insulating spacer frame is divided into four insulating spacers 5i, and both ends of each insulating spacer 5i are formed obliquely inward. In the invention, the present invention is not limited thereto. For example, as shown in FIG. 11, both ends of the insulating spacer 5j divided into four are simply made shorter than the longitudinal and lateral lengths of the transparent fixing plate 3 and both ends are oblique. Alternatively, the gaps 10 may be formed at positions slightly offset from the four corners of the transparent fixing plate 3, or the insulating spacer frame may be divided into other than four to form a transparent fixing plate. Of course, it may be provided not only at the four corners of 3 but also at four sides, or at two corners or at only one or two sides. [0034] In each of Embodiments 1 to 7 described above, the insulating spacer frame and the supporting frame are not transparent, and the opening portion without the insulating spacer frame and the supporting frame is the transmission region of the transparent diaphragm and the transparent fixing plate. In the present invention, the transmission region of the transparent diaphragm is formed by a non-transparent portion provided by coloring the edge of the transparent diaphragm other than the insulating spacer frame and the support frame, for example. Of course it is good. [0035] As described above, in the present invention, when viewed from the outside through the transparent diaphragm and the transparent fixing plate, the extension is extended from the end 04-05-2019 11 of the transmission region of the transparent diaphragm onto the transparent fixing plate. At the position outside the wire, for example, on the side of the insulating spacer frame, or on the transparent fixed plate hidden by the insulating spacer frame or support frame, etc., provide an air vent hole for drawing air out of the closed space. Therefore, the air leakage holes do not impair the output efficiency, and even if the device is attached to the front of a display, a picture, etc., it does not affect the image on the rear side, and the viewer feels uncomfortable. There is no way to give [0036] Brief description of the drawings [0037] FIG. 1 is a cross-sectional view showing a cross-sectional structure of Embodiment 1 of the electrostatic transparent speaker according to the present invention. [0038] FIG. 2 is a perspective view showing an insulating spacer frame 5a of the first embodiment. [0039] FIG. 3 is a perspective view showing the main part of Embodiment 2 of the electrostatic transparent speaker according to the present invention. [0040] FIG. 4 is a cross-sectional view showing the main part of Embodiment 3 of the electrostatic transparent speaker according to the present invention. [0041] FIG. 5 is a cross-sectional view showing a modification of the main part of the third embodiment of the electrostatic transparent speaker according to the present invention. [0042] FIG. 6 is a cross-sectional view showing the main part of Embodiment 4 of the electrostatic transparent speaker according to the present invention. 04-05-2019 12 [0043] FIG. 7 is a cross-sectional view showing the main part of a fifth embodiment of the electrostatic transparent speaker according to the present invention. [0044] FIG. 8 is a cross-sectional view showing a modification of the main part of the fifth embodiment of the electrostatic transparent speaker according to the present invention. [0045] FIG. 9 is a cross-sectional view showing the main part of a sixth embodiment of the electrostatic transparent speaker according to the present invention. [0046] FIG. 10 is a perspective view showing the main part of a seventh embodiment of the electrostatic transparent speaker according to the present invention. [0047] <Figure 11> It is the strabismus figure which shows the deformation example of the principal part of the form 7 of execution of the electrostatic transparent speaker which relates to this invention. [0048] FIG. 12 is a cross-sectional view showing an electrostatic transparent speaker and an electrostatic transparent speaker. [0049] FIG. 13 is a cross-sectional view of a conventional transparent electrostatic transparent speaker. [0050] Explanation of sign [0051] 04-05-2019 13 Reference Signs List 1 transparent diaphragm, 2 transparent electrode film, 3, 3a transparent fixed plate, 4 transparent electrode film, 5a, 5b, 5c, 5d, 5e, 5f, 5g insulating spacer frame, 5i, 5j insulating spacer, 6 Air vents, 7 support frames, 8 sound absorbing materials, 9 grooves, 10 gaps, 12 sound waves, 13 closed spaces. 04-05-2019 14
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