Glass vibration plate and glass vibration plate with vibrator

Abstract

A glass diaphragm (11) is provided with: a glass plate structure (12); a mounting part (16) fixed to one main surface (12A) of the glass plate structure (12); a connecting part (24) which is provided on the opposite side of the mounting part (16) from the glass plate structure (12) side and to which a vibrator (26) for vibrating the glass plate structure (12) is mechanically mounted; and an elastically deformable layer (22) provided on the main surface of the mounting section (16) on the opposite side from the glass plate-forming body (12) side.

Description

Technical Field

[0001] The present disclosure relates to a glass diaphragm and a glass diaphragm with an oscillator. Background Art

[0002] In recent years, a technique of functioning as a speaker by vibrating a glass plate has been studied. In International Publication No. 2021 / 229179, a structure in which a bottom portion and a base portion are fixed to a glass plate by molding is disclosed, and an oscillator (exciter) is mounted on the base portion via a connecting portion. In International Publication No. 2021 / 229180, a structure in which a through-hole is formed in a glass plate, a lower portion of a base portion is inserted into the through-hole, and an oscillator is mounted on an upper portion of the base portion is disclosed.

[0003] However, in the structures disclosed in International Publication No. 2021 / 229179 and International Publication No. 2021 / 229180, when there is a deviation in the fixed state of the oscillator (exciter), there may be individual differences in the attenuation ratio when the glass plate assembly vibrates. Summary of the Invention

[0004] An object of the present disclosure is to obtain a glass diaphragm and a glass diaphragm with an oscillator that reduce individual differences and can reproduce desired acoustic characteristics.

[0005] The glass diaphragm according to the present disclosure includes: a glass plate assembly; a mounting portion fixed to a main surface on one side of the glass plate assembly; a connecting portion provided on a side of the mounting portion opposite to the glass plate assembly side and mechanically mounting an oscillator that vibrates the glass plate assembly; and an elastic deformation layer provided on a main surface on a side of the mounting portion opposite to the glass plate assembly side.

[0006] In the glass diaphragm and the glass diaphragm with an oscillator according to the present disclosure, individual differences can be reduced to reproduce desired acoustic characteristics. Brief Description of the Drawings

[0007] Figure 1 It is a cross-sectional view taken from the side of a glass diaphragm with an oscillator according to an embodiment.

[0008] Figure 2 It is a cross-sectional view taken from the side of a glass diaphragm with an oscillator according to Modification 1.

[0009] Figure 3 It is a cross-sectional view taken from the side of a glass diaphragm with an oscillator according to Modification 2.

[0010] Figure 4 It is a cross-sectional view taken from the side of a glass diaphragm with an oscillator according to Modification 3.

[0011] Figure 5 It is a cross-sectional view showing an enlarged view of the mounting portion and the elastic deformation layer related to Modification 4.

[0012] Figure 6 It is a cross-sectional view showing an enlarged view of the mounting portion and the elastic deformation layer related to Modification 5.

[0013] Figure 7 It is a cross-sectional view showing an enlarged view of the mounting portion and the elastic deformation layer related to Modification 6.

[0014] Figure 8 It is a cross-sectional view showing an enlarged view of the mounting portion and the elastic deformation layer related to Modification 7.

[0015] Figure 9 It is a perspective view of the mounting portion related to Modification 8.

[0016] Figure 10 It is a perspective view of the mounting portion related to Modification 9.

[0017] Figure 11 It is a perspective view of the mounting portion related to Modification 10.

[0018] Figure 12 It is a perspective view of the mounting portion related to Modification 11.

[0019] Figure 13 It is a perspective view of the mounting portion related to Modification 12.

[0020] Figure 14 It is a perspective view of the mounting portion related to Modification 13.

[0021] Figure 15 It is a cross-sectional view of the glass diaphragm with a vibrator related to Modification 14 as viewed from the side.

[0022] Figure 16 It is a cross-sectional view of the glass diaphragm with a vibrator related to Modification 15 as viewed from the side.

[0023] Figure 17 It is a cross-sectional view of the glass diaphragm with a vibrator related to Modification 16 as viewed from the side.

[0024] Figure 18 It is a cross-sectional view of the glass diaphragm with a vibrator related to Modification 17 as viewed from the side. Detailed implementation manners

[0025] With reference to the accompanying drawings, the glass diaphragm 10 with a vibrator related to the implementation manner will be described.

[0026] Figure 1is a cross-sectional view of the glass diaphragm 10 with an oscillator, as viewed from the side. As Figure 1 shown, the glass diaphragm 10 with an oscillator according to the present embodiment is configured to include a glass diaphragm 11 and an oscillator 26.

[0027] The glass diaphragm 11 of the present embodiment is configured to include a glass plate formation 12, a mounting portion 16, and a connecting portion 24.

[0028] (Glass plate formation 12)

[0029] The glass plate formation 12 may be formed of a single glass plate (monolithic glass), or may be formed of laminated glass from the viewpoint of improving the acoustic effect of the glass diaphragm 11. For example, the glass plate formation 12 may be formed of laminated glass including a first glass plate, an intermediate layer, and a second glass plate. The glass plate formation 12 may be a window glass installed in a vehicle. For example, the glass plate formation 12 is used for a windshield, a side window glass, a rear window glass, a rear quarter window glass, a front quarter window glass, a sunroof glass, and a wind reflector, etc., but may also be used for applications such as architectural window glass other than vehicles.

[0030] The glass plate formation 12 may be formed of transparent or translucent inorganic glass, or may be formed of organic glass. As the inorganic glass, for example, soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass can be cited. As the organic glass, for example, PMMA (polymethyl methacrylate) - based resin, PC (polycarbonate) - based resin, PS (polystyrene) - based resin, PET (polyethylene terephthalate) - based resin, PVC (polyvinyl chloride) - based resin, and cellulose - based resin can be cited. And, in the case where the glass plate formation 12 is formed of laminated glass, the glass plate on the mounting portion 16 side may also be formed of a plate - like body formed of a material other than glass. For example, a resin plate formed of a transparent resin material such as an acrylic plate can be used, or a fiber - reinforced plastic including glass fiber and carbon fiber can be used.

[0031] The thickness of the glass plate structure 12 is preferably 1.0 mm or more, more preferably 2.0 mm or more, and further preferably 3.0 mm or more. Thus, the glass plate structure 12 can be provided with sufficient required strength. In addition, in the case of being composed of laminated glass, the thickness of each glass plate is preferably 5.0 mm or less, more preferably 3.0 mm or less, and further preferably 2.0 mm or less. And the thickness of each glass plate is preferably 0.1 mm or more, more preferably 0.5 mm or more, and further preferably 1.0 mm or more.

[0032] The intermediate layer of the laminated glass is formed of a resin film containing a transparent polyvinyl butyral (PVB)-based, ethylene-vinyl acetate copolymer (EVA)-based resin film, silicone (PDMS)-based, polyurethane-based, fluorine-based, polyethylene terephthalate, polycarbonate-based, and other thermoplastic and thermosetting adhesive materials. In addition, the intermediate layer is not limited to a resin film, and may also be composed of a fluid layer containing a liquid or a gel-like body. In this case, a high loss coefficient can be achieved. Furthermore, the "fluid" refers to all fluid substances containing a liquid, such as a liquid, a semi-solid, a mixture of a solid powder and a liquid, and a substance formed by immersing a liquid in a solid gel (gel-like substance). And, a material for improving sound insulation and a material for absorbing ultraviolet rays and infrared rays, etc. may be added to the intermediate layer, or a multi-layer intermediate layer having a functional layer may be provided. The thickness of the intermediate layer can be set, for example, to be 1.0 nm or more and 1.0 mm or less, or can be set to be 0.1 μm or more and 0.9 mm or less, or can also be set to be 0.2 μm or more and 0.8 mm or less.

[0033] In addition, in the case where the glass plate structure 12 is composed of laminated glass, it is not limited to laminated glass in which two glass plates sandwich one intermediate layer. For example, two glass plates may sandwich two or more intermediate layers, or a dimming film that can variably change the visible light transmittance electrically may be sandwiched between two or more intermediate layers. And the glass plate structure 12 may also be a structure in which three or more glass plates sandwich intermediate layers between adjacent glass plates, respectively.

[0034] (Mounting portion 16)

[0035] The glass plate structure 12 has a main surface 12A on one side and a main surface 12B on the other side, and a mounting portion 16 is fixed to the main surface 12A on one side via an adhesive layer 14. As the adhesive layer 14, an adhesive and a bonding agent, etc. can be appropriately used. As the bonding agent, a sheet-like adhesive tape can be used. In addition, as the adhesive layer 14, a sheet-like thermosetting resin material, etc. can also be used.

[0036] The thinner the thickness of the adhesive layer 14, the more effectively the vibration from the oscillator 26 can be transmitted to the glass plate assembly 12. It suffices to be 5.0 mm or less, preferably 3.0 mm or less, more preferably 1.0 mm or less, and further preferably 0.5 mm or less. In addition, although the adhesive layer 14 of the present embodiment is formed with a constant thickness, it is not limited to a constant thickness and may have a thickness distribution. Further, from the viewpoint of maintaining the yield rate in processes such as applying or pasting an adhesive and a bonding agent, the thickness of the adhesive layer 14 is preferably 0.001 mm or more, more preferably 0.005 mm or more, and further preferably 0.01 mm or more.

[0037] The mounting portion 16 is fixed to the adhesive layer 14. The mounting portion 16 may have the same outer shape as the adhesive layer 14 when viewed in the plate thickness direction of the glass plate assembly 12. In addition, the mounting portion 16 includes: a main mounting portion 18 disposed in a connection region V that overlaps the oscillator 26 when viewed in the thickness direction of the glass plate assembly 12; and a first extension portion 20 that extends more outward than the main mounting portion 18 (connection region V).

[0038] The first extension portion 20 extends from the outer peripheral end portion of the main mounting portion 18 in mutually different directions, particularly in mutually opposite directions. Therefore, the outer shape of the mounting portion 16 is the same as that of Figures 9 to 12 the deformation example shown. In addition, the first extension portion 20 is formed in a substantially circular ring shape when viewed in the plate thickness direction of the glass plate assembly 12, and may also be formed in a substantially C shape. Further, three or more first extension portions 20 may be disposed at equal intervals along the periphery of the main mounting portion 18. For example, in the case of having three first extension portions 20 of the same shape, they may be disposed at intervals of 120° with respect to the center of the main mounting portion 18 along the outer peripheral edge of the main mounting portion 18.

[0039] First holes 16A are respectively formed in the first extension portion 20. The first holes 16A open on the side opposite to the glass plate assembly 12 side, and examples thereof include screw holes into which the bolt 25 is screwed.

[0040] The mounting portion 16 may be formed of a metal including stainless steel, aluminum or aluminum alloy, titanium or titanium alloy, stone, wood, etc., and a part of the mounting portion 16 may be formed of a resin such as plastic. As the plastic, general engineering plastics such as ABS-based, PVC-based, PC-based, PP-based, PBT-based, PA66-based, and PPS-based plastics can be used, and fiber-reinforced plastics including glass fiber and carbon fiber can also be used. In addition, the Young's modulus E of the mounting portion 16 M only needs to be 1×10 7 Pa or more, preferably 5×10 7 Pa or more, more preferably 1×10 8 Pa or more. Further, the Young's modulus E of the mounting portion 16M is preferably 1×10 12 Pa or less from the viewpoint of ease of processing.

[0041] In addition, the main mounting portion 18 and the first extension portion 20 may be made of the same material or may be formed of different materials. For example, if the first extension portion 20 is formed of resin, rubber, or the like, the glass plate assembly 12 can easily follow even if it has a curved surface shape, and the vibration from the oscillator 26 can be effectively transmitted.

[0042] The thickness of the mounting portion 16 is preferably small from the viewpoint of making the overall height lower, preferably 50 mm or less, more preferably 30 mm or less, still more preferably 20 mm or less, and particularly preferably 10 mm or less. In addition, the main mounting portion 18 and the first extension portion 20 may have the same thickness or may have different thicknesses. Further, the main mounting portion 18 may be formed in a shape other than a circular shape in a plan view, for example, a rectangular shape or a polygonal shape. In addition, from the viewpoint of ensuring the bending rigidity of the mounting portion 16, the thickness of the mounting portion 16 is preferably 0.5 mm or more, more preferably 1.0 mm or more, and still more preferably 2.0 mm or more.

[0043] (Connecting portion 24)

[0044] On the side of the mounting portion 16 opposite to the glass plate assembly 12 side, there is provided a connecting portion 24 for mechanically mounting the oscillator 26 that vibrates the glass plate assembly 12. In the connection region V, the oscillator 26 is fixed to the side of the connecting portion 24 opposite to the mounting portion 16 side. For example, the connecting portion 24 may also form a part of the frame of the oscillator 26.

[0045] When viewed in the plate thickness direction of the glass plate assembly 12, the connecting portion 24 is formed in substantially the same shape as the mounting portion 16, and includes a second extension portion 27 that overlaps the first extension portion 20 of the mounting portion 16. The second extension portion 27 extends more outward than the connection region V, and a second hole portion 24A is formed at a position corresponding to the first hole portion 16A. The second hole portion 24A penetrates the second extension portion 27, and an insertion hole for inserting a bolt 25 can be exemplified. The first extension portion 20 and the second extension portion 27 overlap and are mechanically fixed by a fastener such as a bolt 25.

[0046] For the fixation of the mounting portion 16 and the connecting portion 24, at least one of bolts, screws, pins, keys, rivets, and clips can also be used for mechanical fastening. As rivets, metal rivets such as blind rivets, and resin rivets, etc. can be used. In addition, bolts, screws, etc. can also be combined with adhesives for fixation. Further, claw portions can be provided on at least one of the mounting portion 16 and the connecting portion 24, and the mounting portion 16 and the connecting portion 24 can be fixed by engaging with the claw portions.

[0047] The vibrator 26 is connected to a power source (not shown) and vibrates the glass plate assembly 12 according to the input electrical signal. The vibration direction for exciting the glass plate assembly 12 is the thickness direction of the vibrator 26. As an example, the vibrator 26 in the present embodiment is a voice coil motor including a coil portion and a magnetic circuit. One of the coil portion and the magnetic circuit is fixed to the connecting portion 24, and the other is disposed so as to be relatively movable with respect to the connecting portion 24. Then, by flowing a current through the coil portion, vibration is generated by the interaction between the coil portion and the magnetic circuit, and the glass plate assembly 12 is vibrated via the connecting portion 24 and the mounting portion 16. The vibration direction is the thickness direction of the vibrator 26. In addition, the vibrator 26 is not limited to a voice coil motor, and any actuator other than a voice coil motor, such as a piezoelectric type, can be adopted as long as it can transmit a desired vibration to the glass plate assembly 12.

[0048] (Elastic deformation layer 22)

[0049] An elastic deformation layer 22 is provided on the main surface of the mounting portion 16 on the side opposite to the glass plate assembly 12 side, and the elastic deformation layer 22 is sandwiched between the mounting portion 16 and the connecting portion 24.

[0050] The elastic deformation layer 22 is continuously disposed in a range including a connection region V that overlaps the vibrator 26 when viewed in the thickness direction of the glass plate assembly 12. In the present embodiment, the elastic deformation layer 22 includes a portion sandwiched between the first extension portion 20 of the mounting portion 16 and the second extension portion 27 of the connecting portion 24.

[0051] The elastic deformation layer 22 includes at least one of resin, rubber, foam material, and gel material. As a resin, the elastic deformation layer 22 can be a hydrocarbon-based, silicone-based, or fluorine-based rubber material. For example, rubber materials such as EPT (Ethylene Propylene Terpolymer), EPDM (Ethylene Propylene Diene Monomer), polyurethane, PDMS (Polydimethylsiloxane), acrylic, and FEP (Fluorinated Ethylene Propylene) can be cited.

[0052] The elastic deformation layer 22 can use a non-adhesive material or an adhesive material. When using an adhesive material as the elastic deformation layer 22, in order to remove the connecting portion 24 from the mounting portion 16 when replacing the oscillator 26, the shear strength is preferably 5.0 MPa or less, more preferably 3.0 MPa or less, further preferably 1.0 MPa or less, and particularly preferably 0.5 MPa or less.

[0053] In addition, the thickness of the elastic deformation layer 22 is preferably 0.02 mm or more, more preferably 0.05 mm or more, and further preferably 0.1 mm or more in order to allow for dimensional errors and deformations of the mounting portion 16. In addition, the thickness of the elastic deformation layer 22 is preferably 5.0 mm or less, more preferably 3.0 mm or less, and further preferably 1.0 mm or less in order to effectively transmit the vibration of the oscillator 26 to the mounting portion 16.

[0054] The Young's modulus E of the elastic deformation layer 22 D is preferably 1×10 3 Pa or more, more preferably 5×10 3 Pa or more, and further preferably 1×10 4 Pa or more. In addition, the Young's modulus E of the elastic deformation layer 22 D is preferably 1×10 8 Pa or less, more preferably 5×10 7 Pa or less, and further preferably 1×10 7 Pa or less.

[0055] As described above, in the present embodiment, since the elastic deformation layer 22 is clamped between the mounting portion 16 and the connecting portion 24, it is possible to reduce dimensional errors and deformations of the mounting portion 16 by the deformation of the elastic deformation layer 22, and individual differences can be reduced. As a result, even when there are deviations in the shape of the mounting portion 16, deviations in the shape of the connecting portion 24, or even deviations in the fixing state of the oscillator 26, it is possible to reduce the deviation of the attenuation ratio when the glass plate assembly 12 vibrates, and the desired acoustic characteristics can be easily obtained. In addition, by providing the elastic deformation layer 22, a mounting mechanism with a high loss factor is realized, and thus the attenuation ratio can be increased.

[0056] (Modification 1)

[0057] Figure 2 is a cross-sectional view of the glass diaphragm 10 with an oscillator according to Modification 1 as viewed from the side. As Figure 2 shown, in this modification, with respect to Figure 1 , the shapes of the mounting portion 16 and the connecting portion 24 are different.

[0058] The mounting portion 16 includes a main mounting portion 18 disposed in the connection region V and a first extension portion 20 that extends more outward than the main mounting portion 18 (connection region V). The first extension portion 20 extends from the outer peripheral end portion of the main mounting portion 18 in mutually different directions, particularly in mutually opposite directions. Here, the thickness of the first extension portion 20 is formed to be thicker than that of the main mounting portion 18.

[0059] The portion of the connecting portion 24 disposed in the connection region V is formed to be thicker than the second extension portion 27, and the portion disposed in the connection region V is disposed in a state of entering between the pair of first extension portions 20.

[0060] An elastic deformation layer 22 is provided on the main surface of the mounting portion 16 on the side opposite to the glass plate assembly 12 side, and the elastic deformation layer 22 is clamped between the mounting portion 16 and the connecting portion 24. In addition, the elastic deformation layer 22 is disposed in a state of entering between the pair of first extension portions 20. In particular, in this modification, the elastic deformation layer 22 is disposed to include the main mounting portion 18 (connection region V), and the elastic deformation layer 22 may be disposed only on the main mounting portion 18 (connection region V).

[0061] In this modification, by forming the first extension portion 20 to be thick, it is possible to increase the fastening strength when the first extension portion 20 and the second extension portion 27 are mechanically fastened.

[0062] (Modification 2)

[0063] Figure 3 is a cross-sectional view of the glass diaphragm 10 with an oscillator according to Modification 2 as viewed from the side. As Figure 3As shown, in this modification example, the first extension portion 20 is not provided in the mounting portion 16, and the second extension portion 27 is not provided in the connecting portion 24.

[0064] The mounting portion 16 is formed in a substantially circular shape when viewed from above, and a first hole portion 16A is formed in the central portion of the mounting portion 16. In addition, when a part of the mounting portion 16 is formed of a resin such as plastic, at least the periphery of the screw hole that becomes the first hole portion 16A in the mounting portion 16 can be formed of a hard metal such as stainless steel by means of screw insertion or the like, and the other parts are formed of a soft metal such as aluminum or a resin such as plastic.

[0065] The connecting portion 24 has a mechanical fastening portion that is connected to the mounting portion 16 inside the connecting region V. As the mechanical fastening portion, an external thread portion provided at a position corresponding to the central axis of the mounting portion 16 is exemplified.

[0066] An elastic deformation layer 22 is provided on the main surface of the mounting portion 16 on the side opposite to the glass plate component 12 side, and the elastic deformation layer 22 is sandwiched between the mounting portion 16 and the oscillator 26. In this case, the elastic deformation layer 22 is disposed in a region other than the external thread portion, and has a hole portion in a portion corresponding to the external thread portion when viewed from the thickness direction of the glass plate component 12. And in this modification example, the elastic deformation layer 22 is preferably composed of a material having adhesiveness.

[0067] That is, in this modification example, the elastic deformation layer 22 can be used as an adhesive material for fixing the elastic deformation layer 22 to the mounting portion 16. In addition, since the oscillator 26 can be fixed to the mounting portion 16 through the connecting portion 24 and the elastic deformation layer 22, it can be firmly fixed. Furthermore, as long as the mounting portion 16 and the connecting portion 24 can be firmly fixed, a material without adhesiveness can also be used for the elastic deformation layer 22.

[0068] (Modification Example 3)

[0069] Figure 4 It is a cross-sectional view of the glass diaphragm 10 with an oscillator according to Modification Example 3 as viewed from the side. As Figure 4 shown, in this modification example, the shape of the connecting portion 24 is different from that of Modification Example 2. That is, when viewed from the thickness direction of the glass plate component 12, the outer edge of the connecting portion 24 has a shape substantially consistent with the outer edge of the mounting portion 16.

[0070] The connecting portion 24 is disposed on the main surface of the mounting portion 16 via the elastic deformation layer 22, and the external thread portion 25 extends from the center of the connecting portion 24 toward the mounting portion 16 side. The connecting portion 24 is mechanically fastened to the mounting portion 16 by screwing the external thread portion 25 with the first hole portion 16A of the mounting portion 16.

[0071] (Modification Example 4)

[0072] Figure 5 is a cross-sectional view showing an enlarged view of the mounting portion 16 and the elastic deformation layer 22 according to Modification 4. As Figure 5 shown, in this modification, a first uneven surface is formed on the mounting portion 16. The first uneven surface is formed on the main surface of the mounting portion 16 on the side opposite to the glass plate forming body 12 side, and is a surface that is uneven with respect to a hypothetical plane orthogonal to the central axis extending in the thickness direction of the glass plate forming body 12 along the mounting portion 16.

[0073] The first uneven surface is configured to include protrusions 30 protruding from the mounting portion 16 toward the elastic deformation layer 22 side and recesses 31 formed between the protrusions 30. In addition, the first uneven surface may be formed over the entire connection region or only on a part of the connection region.

[0074] The height of the unevenness in the first uneven surface is 0.1 μm to 5.0 mm, but is not limited to this range. In Figure 5 it, the maximum height T from the top of the protrusion 30 to the bottom of the recess 31 U is set to 0.1 μm to 5.0 mm. In addition, the range of the maximum height T U can be 1.0 μm to 3.0 mm, can be 10 μm to 1.0 mm, or can be 20 μm to 0.5 mm.

[0075] The surface of the elastic deformation layer 22 on the mounting portion 16 side is formed to be uneven following the first uneven surface. Specifically, the elastic deformation layer 22 includes convex portions 40 and concave portions 41, and the convex portions 40 enter the recesses 31 of the mounting portion 16. In addition, the protrusions 30 of the mounting portion 16 enter between the concave portions 41. The aspect ratio (ratio of the maximum width to the maximum height (depth)) of the uneven portions ranges from 1:100 to 100:1, preferably from 1:50 to 50:1, more preferably from 1:20 to 20:1, and further preferably from 1:10 to 10:1.

[0076] Here, the maximum thickness T of the elastic deformation layer 22 R is formed to be thicker than the maximum height T of the first uneven surface U thick.

[0077] In this modification, by having the first uneven surface on the mounting portion 16 in contact with the elastic deformation layer 22, the elastic deformation layer 22 follows in a manner meshing with the first uneven surface, so that it can be firmly fixed to the mounting portion 16, and it is possible to easily reduce the positional deviation.

[0078] (Modification 5)

[0079] Figure 6It is a cross-sectional view showing an enlarged view of the mounting portion 16 and the elastic deformation layer 22 according to Modification 5. As Figure 6 shown, in this modification, a first uneven surface is formed on the mounting portion 16.

[0080] The first uneven surface is configured to include one protrusion 30 that bulges from the mounting portion 16 toward the elastic deformation layer 22 side. A concave portion 41 that follows the protrusion 30 is formed on the surface of the elastic deformation layer 22 on the mounting portion 16 side.

[0081] (Modification 6)

[0082] Figure 7 It is a cross-sectional view showing an enlarged view of the mounting portion 16 and the elastic deformation layer 22 according to Modification 6. As Figure 7 shown, in this modification, a first uneven surface is formed on the mounting portion 16.

[0083] The first uneven surface is configured to include one depression 31 formed in the mounting portion 16. A convex portion 40 that follows the depression 31 is formed on the surface of the elastic deformation layer 22 on the mounting portion 16 side.

[0084] (Modification 7)

[0085] Figure 8 It is a cross-sectional view showing an enlarged view of the mounting portion 16 and the elastic deformation layer 22 according to Modification 7. As Figure 8 shown, in this modification, a first uneven surface is formed on the mounting portion 16.

[0086] The first uneven surface is configured to include two or more protrusions 30 that bulge from the mounting portion 16 toward the elastic deformation layer 22 side. The protrusions 30 are continuously formed in a wave shape. A concave portion 41 that follows the protrusions 30 is formed on the surface of the elastic deformation layer 22 on the mounting portion 16 side.

[0087] In Modifications 5 to 7, compared with the first uneven surface of Modification 4, the width of the unevenness (periodic) is wide, and the first uneven surface of the mounting portion 16 has large corrugations (deformations). In Modifications 5 to 7, for example, even when the mounting portion 16 is processed into a flat shape, it can include deformations that appear as deformations formed according to manufacturing conditions, and the first uneven surface where the presence or absence of deformation and the size of the deformation (height of the unevenness) cannot be distinguished by visual observation. Therefore, in the case of Modifications 5 to 7, by having the elastic deformation layer 22, it is possible to deform in a manner that reduces the height (deformation) of the first uneven surface, and sometimes high-precision specifications may not be required for the main surface shape of the mounting portion 16 that contacts the elastic deformation layer 22. In this way, by having the elastic deformation layer 22, the productivity of the mounting portion 16 can be improved.

[0088] (Modification 8)

[0089] Figure 9 is a perspective view of the mounting portion according to Modification 8. As Figure 9 shown, in this modification, a first uneven surface is formed on the main mounting portion 18 of the mounting portion 16. The first uneven surface is formed to include at least one of a convex portion 32 and a concave portion 33 that are formed in a linear shape with a predetermined width. In addition, the widths of the linear convex portion 32 and the concave portion 33 may be constant, or at least a part of the width may gradually increase or gradually decrease. For example, one of the convex portion 32 and the concave portion 33 may be wedge-shaped when viewed from above.

[0090] In addition, the first uneven surface may be formed only by the convex portion 32, or may be formed only by the concave portion 33. Further, the linear convex portion 32 and the concave portion 33 may be formed substantially in parallel, or may be formed at an angle to each other. Also, the linear convex portion 32 and the concave portion 33 may be formed to intersect each other.

[0091] Moreover, the first uneven surface may be formed by two or more convex portions 32 and concave portions 33, or may be formed by only one convex portion 32 or concave portion 33.

[0092] (Modification 9)

[0093] Figure 10 is a perspective view of the mounting portion according to Modification 9. As Figure 10 shown, in this modification, a first uneven surface is formed on the main mounting portion 18 of the mounting portion 16. The first uneven surface is formed to include at least one of a convex portion 32 and a concave portion 33 that are formed in a linear shape. In addition, the line width may be a constant width as described in Modification 8, or may gradually increase or decrease in part.

[0094] In this modification, three convex portions 32 are formed on the main mounting portion 18, and two of the convex portions 32 are formed in a curved shape, but all three convex portions 32 may be formed in a curved shape, or all three convex portions 32 may be formed in a linear shape. Further, a part of the convex portions 32 may be formed discontinuously.

[0095] And, in this modification, five concave portions 33 are formed on the main mounting portion 18, and three of the concave portions 33 are formed discontinuously in a linear shape, but four or more concave portions 33 may be formed discontinuously, or two concave portions 33 may be formed discontinuously.

[0096] Although in Figure 10 , two of the five concave portions 33 are formed discontinuously in a curved shape, but three or more concave portions 33 may be formed discontinuously in a curved shape. In addition, the lengths of the concave portions 33 may be formed with different lengths, or may be formed with the same length.

[0097] In addition, although in Figure 10 the first uneven surface is formed by the irregularly arranged convex portions 32 and concave portions 33, the first uneven surface may also be formed by the regularly arranged convex portions 32 and concave portions 33.

[0098] (Modification Example 10)

[0099] Figure 11 is a perspective view of the mounting portion according to Modification Example 10. As Figure 11 shown, in this modification example, a first uneven surface is formed on the main mounting portion 18 of the mounting portion 16. The first uneven surface is formed by including at least one of the convex portion 32 and the concave portion 33 formed in a circular linear shape.

[0100] Although the convex portion 32 is formed in a continuous circular linear shape, it may also be formed in a discontinuous circular linear shape. In addition, although the concave portion 33 is formed in a discontinuous circular linear shape, it may also be formed in a continuous circular linear shape. Further, in this modification example, the line widths of the convex portion 32 and the concave portion 33 may also be, as in Modification Example 8, a constant width, or may gradually increase or decrease in part.

[0101] (Modification Example 11)

[0102] Figure 12 is a perspective view of the mounting portion according to Modification Example 11. As Figure 12 shown, in this modification example, a first uneven surface is formed on the main mounting portion 18 of the mounting portion 16. The first uneven surface is formed by including at least one of the irregularly dispersed protrusions 34 and depressions 35.

[0103] Although three protrusions 34 and three depressions 35 are formed on the main mounting portion 18, the numbers of the protrusions 34 and the depressions 35 are not limited, and only a plurality of protrusions 34 may be formed, or only a plurality of depressions 35 may be formed. In addition, the protrusions 34 and the depressions 35 may also be formed regularly. Further, the protrusions 34 may also be such that the lower portions (portions corresponding to the bases) of the plurality of protrusions 34 are connected to include a plurality of vertices. And the depressions 35 may also be such that the upper portions (shallow portions of the depressions 35) of the plurality of depressions 35 are connected to include a plurality of bottoms (portions that become the minimum values).

[0104] In addition, the convex portion 32, the concave portion 33, the protrusion 34, and the depression 35 shown in Figures 9 to 12 may also be combined to form the first uneven surface. For example, in Figure 12 the main mounting portion 18 may also include the linear convex portion 32 and the concave portion 33.

[0105] (Modification Example 12)

[0106] Figure 13 is a perspective view of the mounting portion according to Modification 12. As Figure 13 shown, in this modification, a first uneven surface is formed on the main mounting portion 18 of the mounting portion 16. The first uneven surface is formed by a substantially H-shaped convex portion 32.

[0107] The convex portion 32 may also be formed by connecting a plurality of linear convex portions that intersect each other. Alternatively, instead of the convex portion 32, the first uneven surface may be formed by a substantially H-shaped concave portion 33. Also, a part of the H shape may be formed by the concave portion 33. By forming the substantially H-shaped convex portion 32 or concave portion 33 on the first uneven surface, the bending strength of the main mounting portion 18 is improved.

[0108] (Modification 13)

[0109] Figure 14 is a perspective view of the mounting portion according to Modification 13. As Figure 14 shown, in this modification, a coating film 36 is laminated on a part of the main mounting portion 18 and the first extension portion 20 of the mounting portion 16.

[0110] The coating film 36 includes a plurality of particles 36A, and a first uneven surface is formed on the main mounting portion 18 by the plurality of particles 36A. In addition, in Figure 14 , for ease of explanation, the size of the particles 36A is exaggeratedly drawn. And although in Figure 14 , for ease of explanation, the intervals between the particles 36A are drawn to be substantially constant, they may also be formed at irregular intervals.

[0111] The arithmetic surface roughness Ra of the first uneven surface formed by the particles 36A according to JIS B0601:2001 is 1.0 μm to 3000 μm, preferably 2.0 μm to 1000 μm, more preferably 5.0 μm to 500 μm, and even more preferably 10.0 μm to 200 μm.

[0112] (Modification 14)

[0113] Figure 15 is a cross-sectional view of the glass diaphragm 10 with the oscillator taken from the side according to Modification 14. As Figure 15 shown, in this modification, the shapes of the mounting portion 16 and the connecting portion 24 are different from those in the embodiment.

[0114] The mounting portion 16 includes: a main mounting portion 18 disposed in the connection region V, and a first extension portion 20 that extends more outward than the main mounting portion 18 (connection region V). The first extension portion 20 extends in opposite directions from the outer peripheral end of the main mounting portion 18. The connection portion 24 is formed in substantially the same shape as the mounting portion 16 when viewed in the thickness direction of the glass plate assembly 12, and includes a second extension portion 27 that overlaps the first extension portion 20 of the mounting portion 16. The second extension portion 27 extends more outward than the connection region V, and the first extension portion 20 overlaps the second extension portion 27 and is mechanically fixed by a fastener such as a bolt 25.

[0115] Here, a first uneven surface is formed on the mounting portion 16. The first uneven surface is formed on the main surface of the mounting portion 16 on the side opposite to the glass plate assembly 12 side, and is a surface that is formed in an uneven shape with respect to a virtual plane orthogonal to the central axis extending in the thickness direction of the glass plate assembly 12 of the mounting portion 16. In addition, a second uneven surface is formed on the connection portion 24. The second uneven surface is formed on the main surface of the connection portion 24 on the mounting portion 16 side, and is a surface that is formed in an uneven shape with respect to a virtual plane orthogonal to the central axis extending in the thickness direction of the glass plate assembly 12 of the connection portion 24.

[0116] An elastic deformation layer 22 is provided between the mounting portion 16 and the connection portion 24. Protrusions 22A that follow the first uneven surface are formed on the surface of the elastic deformation layer 22 on the mounting portion 16 side. In addition, protrusions 22B that follow the second uneven surface are formed on the surface of the elastic deformation layer 22 on the connection portion 24 side.

[0117] In this modification, the elastic deformation layer 22 follows in a manner that meshes with both the first uneven surface and the second uneven surface with which it comes into contact, and thus can be more firmly fixed with respect to both the mounting portion 16 and the connection portion 24. In addition, although an example in which the first uneven surface and the second uneven surface in this modification have multiple minute unevennesses as shown in Figure 5 Modification Example 4 has been described, it is not limited thereto. That is, as a combination of the first uneven surface and the second uneven surface, any combination among Modification Examples 4 to 13 can also be used.

[0118] (Modification Example 15)

[0119] Figure 16 is a cross-sectional view of the glass diaphragm 10 with a vibrator according to Modification Example 15 as viewed from the side. As Figure 16 shown, in this modification, a first adhesive layer 50 is disposed between the connection portion 24 and the elastic deformation layer 22. In addition, a second adhesive layer 52 is disposed between the mounting portion 16 and the elastic deformation layer 22. In addition, either the first adhesive layer 50 or the second adhesive layer 52 may be disposed.

[0120] The first adhesive layer 50 is disposed in the connection portion 24 over the entire area including the second extension portion 27, and similar to the adhesive layer 14, an adhesive, a bonding agent, or the like can be appropriately used. As the bonding agent, a sheet-shaped adhesive tape can be used. Further, as the first adhesive layer 50, a sheet-shaped thermosetting resin material or the like can also be used.

[0121] The second adhesive layer 52 is disposed over the entire area including the main mounting portion 18 and the first extension portion 20, and the same material as that of the first adhesive layer 50 can be used. Further, the first adhesive layer 50 and the second adhesive layer 52 may be formed of different materials.

[0122] In this modified example, even when the elastic deformation layer 22 is formed of a non-adhesive material, it can be fixed to the mounting portion 16 and the connection portion 24. Further, in this modified example, the elastic deformation layer 22 may be formed of an adhesive material.

[0123] (Modified Example 16)

[0124] Figure 17 is a cross-sectional view of the glass diaphragm 10 with an oscillator as viewed from the side according to Modified Example 16. As Figure 17 shown, the mounting portion 16 is fixed to one main surface of the glass plate assembly 12 via the adhesive layer 14. The mounting portion 16 is configured to include a main mounting portion 18 and a first extension portion 20.

[0125] The main mounting portion 18 includes: a portion that is substantially circular when viewed from above the glass plate assembly 12, and arm portions that extend radially outward from the outer edge of the substantially circular shape and are separated from each other. Further, a first extension portion 20 is formed at the end of the arm portion, and the first extension portion 20 is formed thicker than the main mounting portion 18. And, holes 16A are provided in each of the three first extension portions 20.

[0126] A connection portion 24 is provided on the side of the mounting portion 16 opposite to the glass plate assembly 12 side. The connection portion 24 is formed in substantially the same shape as the mounting portion 16 when viewed in the plate thickness direction of the glass plate assembly 12, and includes a second extension portion 27 that overlaps the first extension portion 20 of the mounting portion 16.

[0127] The entire connection portion 24 of this modified example is formed to have the same thickness, and a second hole 24A is formed at a position corresponding to the first hole 16A of the second extension portion 27. The second hole 24A penetrates the second extension portion 27, and an insertion hole for inserting a bolt 25 can be exemplified, and the first extension portion 20 and the second extension portion 27 overlap each other and are mechanically fixed by a fastener such as a bolt 25.

[0128] An elastic deformation layer 22 is provided on the main surface of the mounting portion 16 on the side opposite to the glass plate assembly 12 side. The elastic deformation layer 22 is clamped between the mounting portion 16 and the connecting portion 24. In particular, in this modified example, the elastic deformation layer 22 is provided between the first extension portion 20 and the second extension portion 27.

[0129] Here, in this modification, an oscillator 26 is disposed in the space surrounded by the connecting portion 24 and the mounting portion 16. In addition, since the oscillator 26 is covered by the connecting portion 24, a structure is formed in which the oscillator 26 is not exposed to the outside. In this modified example, since the oscillator 26 is not exposed to the outside, the oscillator 26 cannot be directly contacted.

[0130] (Modified Example 17)

[0131] Figure 18 is a cross-sectional view of the glass diaphragm 10 with an oscillator according to Modified Example 17 as viewed from the side. As Figure 18 shown, the mounting portion 16 is configured to include a main mounting portion 18 and a first extension portion 20 that is thicker than the main mounting portion 18.

[0132] A connecting portion 24 is provided on the side of the mounting portion 16 opposite to the glass plate assembly 12 side. The connecting portion 24 is configured to include a second extension portion 27 that does not overlap with the oscillator 26 when viewed from above the glass plate assembly 12, and a through hole 24A that penetrates in the plate thickness direction is formed in the second extension portion 27.

[0133] Here, in this modified example, a part of the oscillator 26 is disposed in the space surrounded by the connecting portion 24 and the mounting portion 16, and the other part of the oscillator 26 is disposed at a position outside the connecting portion 24. Thus, in this modification, even when the oscillator 26 is thick, it can be mounted.

[0134] <Experimental Example>

[0135] Examples are given below to more specifically illustrate the embodiments of the present disclosure. The materials, dimensions, shapes, and evaluation sequences shown in the following examples can be appropriately changed as long as they do not depart from the gist of the embodiments of the present disclosure. Therefore, the scope of the embodiments of the present disclosure is not limited to the specific examples shown below.

[0136] (Glass diaphragm with oscillator)

[0137] As an example, as the glass diaphragm 10 with an oscillator, the structure of the embodiment shown in Figure 1 is adopted. Among them, the thickness of the elastic deformation layer 22 is 1 mm. In addition, as a comparative example, the structure obtained by removing the elastic deformation layer 22 from the structure of the embodiment shown in Figure 1 is adopted.

[0138] Regarding the configurations of the examples and comparative examples, the vibrator 26 was vibrated and the attenuation ratio was measured. An acceleration sensor (NP-3200, manufactured by Ono Sokki Co., Ltd.) and an FFT analyzer (DS-3200, manufactured by Ono Sokki Co., Ltd.) were used for the measurement of the attenuation ratio. The results obtained by performing the measurement three times for each configuration are shown in Table 1 below. In addition, the attenuation ratio ζ in the examples and comparative examples was calculated by the half-value width method. Specifically, when the peak frequency when taking the frequency on the horizontal axis is f 0 at this time, the frequency width Δf of the two points that are 3 dB lower than the peak value is obtained as the attenuation ratio ζ, and according to the relational expression of "ζ = Δf / (2f 0 )", it is obtained.

[0139] [Table 1]

[0140] First time Second time Third time Average value Example 6.15 6.49 6.55 6.40 Comparative example 5.27 5.49 4.93 5.23

[0141] From the results shown in Table 1, it can be seen that the attenuation ratio of the configuration of the example in which the elastic deformation layer 22 is sandwiched between the mounting portion 16 and the connecting portion 24 is greater than that of the comparative example. As a result, by providing the elastic deformation layer 22, the sound convergence is improved, and various characteristics such as transient response (short pure tone) can be improved.

[0142] Based on the above, in addition to the advantages in the fastening process, by having the elastic deformation layer, an installation structure with an attenuation ratio higher than that of the past can be realized, and as a glass diaphragm, the desired sound can be obtained. In addition, although the glass diaphragm 10 and the glass diaphragm 11 with a vibrator related to the embodiments and modified examples have been described, of course, they can be implemented in various forms without departing from the gist of the present disclosure.

[0143] Explanation of reference numerals

[0144] 10... Glass diaphragm with a vibrator; 11... Glass diaphragm; 12... Glass plate constituent body; 16... Mounting portion; 22... Elastic deformation layer; 24... Connecting portion; 26... Vibrator; 30... Protrusion; 31... Depression; 32... Convex portion; 33... Concave portion; 34... Protrusion; 35... Depression; V... Connection area.

Claims

1. A glass diaphragm, wherein, it has: a glass plate structure; a mounting portion fixed to a main surface on one side of the glass plate structure; a connecting portion provided on a side of the mounting portion opposite to the glass plate structure side, and a vibrator for vibrating the glass plate structure is mechanically mounted thereon; and an elastic deformation layer provided on a main surface on a side of the mounting portion opposite to the glass plate structure side.

2. The glass diaphragm according to claim 1, wherein, the elastic deformation layer contains resin.

3. The glass diaphragm according to claim 1 or 2, wherein, the elastic deformation layer is continuously arranged in a range including a connection region that overlaps with the vibrator when viewed in the thickness direction of the glass plate structure.

4. The glass diaphragm according to claim 1, wherein, the main surface on a side of the mounting portion opposite to the glass plate structure side includes: a first uneven surface formed in a concavo-convex shape with respect to a hypothetical plane orthogonal to a central axis extending in the thickness direction of the glass plate structure of the mounting portion.

5. The glass diaphragm according to claim 4, wherein, The maximum thickness T of the elastic deformation layer R is greater than the maximum height T U of the first uneven surface.

6. The glass diaphragm according to claim 4 or 5, wherein, the first uneven surface is formed by including at least one of a convex portion and a concave portion formed in a linear shape.

7. The glass diaphragm according to claim 6, wherein, the convex portion and the concave portion are formed to intersect each other.

8. The glass diaphragm according to any one of claims 4 to 7, wherein, the first uneven surface is irregularly formed.

9. The glass diaphragm according to claim 8, wherein, the first uneven surface is formed by including at least one of protrusions and depressions that are irregularly dispersed.

10. The glass diaphragm according to claim 9, wherein, the arithmetic surface roughness Ra of the first uneven surface according to JIS B0601:2001 is 1.0 μm to 3000 μm.

11. The glass diaphragm according to claim 10, wherein, the first uneven surface is formed over the entire connection region.

12. The glass diaphragm according to claim 10, wherein, the height of the unevenness of the first uneven surface is 0.1 μm to 5.0 mm.

13. The glass diaphragm according to any one of claims 1 to 12, wherein, the main surface on the mounting portion side of the connecting portion includes: a second uneven surface formed in a concavo-convex shape with respect to a hypothetical plane orthogonal to a central axis extending in the thickness direction of the glass plate structure of the connecting portion.

14. The glass diaphragm according to any one of claims 1 to 13, wherein, it includes at least one of a first adhesive layer disposed between the connecting portion and the elastic deformation layer and a second adhesive layer disposed between the mounting portion and the elastic deformation layer.

15. The glass diaphragm according to any one of claims 1 to 14, wherein, the elastic deformation layer has adhesiveness.

16. The glass diaphragm according to any one of claims 1 to 15, wherein, The Young's modulus E of the mounting portion M is 1×10 7 Pa or more.

17. The glass diaphragm according to any one of claims 1 to 16, wherein, The mounting portion includes a first extension portion that extends more outward than the connection region. The connecting portion includes a second extension portion that extends more outward than the connection region. The first extension portion and the second extension portion overlap and are mechanically fixed.

18. The glass diaphragm according to claim 17, wherein, The elastic deformation layer includes a portion sandwiched between the first extension portion and the second extension portion.

19. The glass diaphragm according to any one of claims 1 to 16, wherein, The connecting portion has a mechanical fastening portion connected to the mounting portion inside the connection region.

20. The glass diaphragm according to claim 19, wherein, The mechanical fastening portion is provided at a position corresponding to the central axis of the mounting portion.

21. The glass diaphragm according to any one of claims 1 to 20, wherein, The thickness of the elastic deformation layer is 0.02 mm to 5.0 mm.

22. The glass diaphragm according to any one of claims 1 to 21, wherein, The Young's modulus E of the elastic deformation layer D is 1×10 3 Pa to 1×10 8 Pa.

23. The glass diaphragm according to any one of claims 1 to 22, wherein, The elastic deformation layer includes at least one of rubber, foam material, and gel material.

24. A glass diaphragm with an oscillator, wherein, It has: The glass diaphragm according to any one of claims 1 to 23; and The oscillator mounted on the connecting portion.

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