Glass diaphragm and vibrator-equipped glass diaphragm

Abstract

This glass diaphragm (11) has: a glass plate constituent body (12); a mount part (16) which is fixed to a main surface (12A) on one side of the glass plate constituent body (12); a connection part (24) which is provided to the side of the mount part (16) that is reverse of the glass plate constituent body (12) and to which a vibrator (26) for vibrating the glass plate constituent body (12) is mechanically attached; and an elastic deformation layer (22) which is provided to a main surface on the side of the mount part (16) that is reverse of the glass plate constituent body (12).

Description

Glass diaphragm and glass diaphragm with vibrator

[0001] The present disclosure relates to a glass diaphragm and a glass diaphragm with a vibrator.

[0002] In recent years, technology has been studied that allows a glass plate to function as a speaker by vibrating it. International Publication No. 2021 / 229179 discloses a structure in which a sole and a base are fixed to a glass plate by molding, and a vibrator (exciter) is attached to the base via a connecting part. International Publication No. 2021 / 229180 discloses a structure in which a through hole is formed in a glass plate, a lower part of a base is inserted into the through hole, and a vibrator is attached to an upper part of the base.

[0003] However, the structures disclosed in International Publication No. 2021 / 229179 and International Publication No. 2021 / 229180 had the risk of individual differences in the damping ratio when the glass plate structure was vibrated if there was variation in the fixing state of the vibrator (exciter).

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

[0005] The glass vibration plate according to the present disclosure includes a glass plate construct, a mount portion fixed to one main surface of the glass plate construct, a connection portion provided on the side of the mount portion opposite to the glass plate construct side and to which a vibrator that vibrates the glass plate construct is mechanically attached, and an elastic deformation layer provided on the main surface of the mount portion opposite to the glass plate construct side.

[0006] The glass diaphragm and the glass diaphragm with a vibrator according to the present disclosure can reduce individual differences and reproduce desired acoustic characteristics.

[0007] 1 is a cross-sectional view of a vibrator-equipped glass diaphragm according to an embodiment, as seen from the side; FIG. 2 is a cross-sectional view of a vibrator-equipped glass diaphragm according to Modification 1, as seen from the side; FIG. 3 is a cross-sectional view of a vibrator-equipped glass diaphragm according to Modification 2, as seen from the side; FIG. 4 is a cross-sectional view of a vibrator-equipped glass diaphragm according to Modification 3, as seen from the side; FIG. 5 is a cross-sectional view of an enlarged view of a mount section and an elastic deformation layer according to Modification 4; FIG. 6 is a cross-sectional view of an enlarged view of a mount section and an elastic deformation layer according to Modification 5; FIG. 7 is a cross-sectional view of an enlarged view of a mount section and an elastic deformation layer according to Modification 6; FIG. 8 is a cross-sectional view of an enlarged view of a mount section and an elastic deformation layer according to Modification 7; FIG. 9 is a perspective view of a mount section according to Modification 8; FIG. 10 is a perspective view of a mount section according to Modification 9; FIG. 11 is a perspective view of a mount section according to Modification 11; FIG. 12 is a perspective view of a mount section according to Modification 13; FIG. 14 is a cross-sectional view of a vibrator-equipped glass diaphragm according to Modification 14, as seen from the side; FIG. 15 is a cross-sectional view of a vibrator-equipped glass diaphragm according to Modification 15; FIG. 16 is a cross-sectional view of a vibrator-equipped glass diaphragm according to Modification 16. FIG. 20 is a cross-sectional view of a glass vibrating plate with a vibrator according to a seventeenth modification, viewed from the side.

[0008] A glass vibrating plate 10 with a vibrator according to an embodiment will be described with reference to the drawings.

[0009] 1 is a cross-sectional side view of a vibrator-equipped glass diaphragm 10. As shown in FIG. 1, the vibrator-equipped glass diaphragm 10 of this embodiment includes a glass diaphragm 11 and a vibrator 26.

[0010] The glass diaphragm 11 of this embodiment includes a glass plate structure 12 , a mount portion 16 , and a connection portion 24 .

[0011] (Glass Plate Structure 12) The glass plate structure 12 may be formed of a single glass plate (single plate 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 structure 12 may be formed of laminated glass in which a first glass plate, an intermediate layer, and a second glass plate are laminated together. The glass plate structure 12 may also be window glass to be attached to a vehicle. For example, the glass plate structure 12 is used for windshields, side glass, rear glass, rear quarter glass, front bench glass, roof glass, wind reflectors, etc., but can also be used for applications other than vehicles, such as architectural window glass.

[0012] The glass plate structure 12 may be formed of transparent or translucent inorganic glass or organic glass. Examples of inorganic glass include soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass. Examples of organic glass include 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. Furthermore, when the glass plate structure 12 is formed of laminated glass, the glass plate on the mount portion 16 side may be formed of a plate-like body made of a material other than glass. For example, a resin plate made of a transparent resin material such as an acrylic plate may be used, or a fiber-reinforced plastic containing glass fiber or carbon fiber may be used.

[0013] The thickness of the glass plate construct 12 is preferably 1.0 mm or more, more preferably 2.0 mm or more, and even more preferably 3.0 mm or more. This allows the glass plate construct 12 to have sufficient strength. When the glass plate construct 12 is made of laminated glass, the thickness of each glass plate is preferably 5.0 mm or less, more preferably 3.0 mm or less, and even more preferably 2.0 mm or less. Furthermore, the thickness of each glass plate is preferably 0.1 mm or more, more preferably 0.5 mm or more, and even more preferably 1.0 mm or more.

[0014] The interlayer of laminated glass is formed from a resin film containing a thermoplastic or thermosetting adhesive material, such as a transparent polyvinyl butyral (PVB)-based or ethylene-vinyl acetate copolymer (EVA)-based resin film, silicone (PDMS), polyurethane, fluorine-based, polyethylene terephthalate, or polycarbonate. The interlayer is not limited to a resin film; it may also be composed of a fluid layer containing a liquid or a gel-like substance, which can achieve a high loss factor. The term "fluid" encompasses all fluid materials, including liquids, semisolids, mixtures of solid powder and liquid, and solid gels (jelly-like substances) impregnated with liquid. Furthermore, the interlayer may contain materials that enhance sound insulation, absorb ultraviolet or infrared rays, or be a multi-layer interlayer with a functional layer. The thickness of the intermediate layer may be set, for example, to 1.0 nm or more and 1.0 mm or less, 0.1 μm or more and 0.9 mm or less, or 0.2 μm or more and 0.8 mm or less.

[0015] Note that when the glass plate structure 12 is constructed of laminated glass, it is not limited to laminated glass in which one intermediate layer is sandwiched between two glass plates. For example, two or more intermediate layers may be sandwiched between two glass plates, or a light control film that electrically changes the visible light transmittance may be sandwiched between the two or more intermediate layers. Furthermore, the glass plate structure 12 may be constructed of three or more glass plates in which an intermediate layer is sandwiched between each of the adjacent glass plates.

[0016] (Mounting portion 16) The glass plate structure 12 has one main surface 12A and the other main surface 12B, and the mounting portion 16 is fixed to the one main surface 12A via an adhesive layer 14. The adhesive layer 14 can be made of an adhesive, a pressure-sensitive adhesive, or the like, as appropriate. As the pressure-sensitive adhesive, a sheet-shaped adhesive tape can be used. Alternatively, the adhesive layer 14 can be made of a sheet-shaped thermosetting resin material or the like.

[0017] The thinner the adhesive layer 14, the more effectively it can transmit vibrations from the vibrator 26 to the glass plate structure 12. Therefore, the thickness of the adhesive layer 14 should be 5.0 mm or less, preferably 3.0 mm or less, more preferably 1.0 mm or less, and even more preferably 0.5 mm or less. Although the adhesive layer 14 of this embodiment is formed to a constant thickness, the thickness may vary. From the viewpoint of maintaining yield in the process of applying or attaching adhesives and pressure-sensitive adhesives, the thickness of the adhesive layer 14 is preferably 0.001 mm or more, more preferably 0.005 mm or more, and even more preferably 0.01 mm or more.

[0018] A mount portion 16 is fixed to the adhesive layer 14. The mount portion 16 preferably has the same outer shape as the adhesive layer 14 when viewed in the thickness direction of the glass plate construct 12. The mount portion 16 also includes a main mount portion 18 disposed in a connection region V that overlaps with the vibrator 26 when viewed in the thickness direction of the glass plate construct 12, and a first extension portion 20 that extends outward from the main mount portion 18 (connection region V).

[0019] The first extension portions 20 extend from the outer peripheral end of the main mount portion 18 in different directions, particularly in opposite directions. Therefore, the outer shape of the mount portion 16 is similar to that of the modified examples shown in FIGS. 9 to 12 . The first extension portions 20 may be formed in a substantially annular shape or a substantially C-shape when viewed from the plate thickness direction of the glass plate structure 12. Three or more first extension portions 20 may be arranged at equal intervals along the periphery of the main mount portion 18. For example, when there are three first extension portions 20 of the same shape, they may be arranged along the outer peripheral edge of the main mount portion 18 at 120° intervals with respect to the center of the main mount portion 18.

[0020] A first hole portion 16A is formed in each of the first extending portions 20. The first hole portion 16A is open on the side opposite to the glass plate construct 12 side, and can be, for example, a screw hole into which a bolt 25 is screwed.

[0021] The mount 16 may be made of metals such as stainless steel, aluminum or aluminum alloys, titanium or titanium alloys, stone, or wood, or a portion of the mount 16 may be made of resin such as plastic. As the plastic, general engineering plastics such as ABS, PVC, PC, PP, PBT, PA66, and PPS may be used, or fiber-reinforced plastics including glass fiber and carbon fiber may be used. In addition, the Young's modulus E of the mount 16 may be Ｍ is 1 x 10 ７ [Pa] or more is sufficient, and ７ [Pa] or more is preferable, and 1 × 10 ８ [Pa] or more is more preferable. Ｍ is 1 × 10 from the viewpoint of ease of processing. 12 [Pa] or less is preferred.

[0022] Furthermore, the main mount portion 18 and the first extension portion 20 may be made of the same material or different materials. For example, if the first extension portion 20 is made of resin, rubber, or the like, it can easily follow the curved shape of the glass plate structure 12, and vibrations from the vibrator 26 can be easily transmitted.

[0023] The thinner the thickness of the mount portion 16, the lower the profile, and the thinner the thickness is. The thickness is preferably 50 mm or less, more preferably 30 mm or less, even more preferably 20 mm or less, and particularly preferably 10 mm or less. The main mount portion 18 and the first extension portion 20 may be formed with the same thickness or different thicknesses. Furthermore, the main mount portion 18 may be formed in a shape other than a circle in a plan view, such as a rectangle or a polygon. To ensure the bending rigidity of the mount portion 16, the thickness of the mount portion 16 is preferably 0.5 mm or more, more preferably 1.0 mm or more, and even more preferably 2.0 mm or more.

[0024] (Connection portion 24) On the side of the mount portion 16 opposite to the glass plate construct 12 side, a connection portion 24 is provided to which a vibrator 26 that vibrates the glass plate construct 12 is mechanically attached. In the connection region V, the vibrator 26 is fixed to the side of the connection portion 24 opposite to the mount portion 16 side. For example, the connection portion 24 may constitute a part of the housing of the vibrator 26.

[0025] The connection portion 24 is formed in substantially the same shape as the mount portion 16 when viewed in the plate thickness direction of the glass plate structure 12, and includes a second extension portion 27 superimposed on the first extension portion 20 of the mount portion 16. The second extension portion 27 extends outward beyond the connection region V, and has a second hole portion 24A formed at a position corresponding to the first hole portion 16A. The second hole portion 24A penetrates the second extension portion 27 and can be exemplified by an insertion hole through which a bolt 25 is inserted, and the first extension portion 20 and the second extension portion 27 are superimposed and mechanically fixed by a fastener such as the bolt 25.

[0026] The mount portion 16 and the connection portion 24 may be fastened mechanically using at least one of a bolt, a screw, a pin, a key, a rivet, and a clip. Metal rivets such as blind rivets, and resin rivets may be used as rivets. The mount portion 16 and the connection portion 24 may also be fastened using a combination of bolts, screws, and adhesive. Furthermore, the mount portion 16 and the connection portion 24 may be fastened by providing a claw portion on at least one of the mount portion 16 and the connection portion 24 and engaging the claw portion.

[0027] The vibrator 26 is connected to a power source (not shown) and vibrates the glass plate construct 12 in response to an input electrical signal. The vibration direction of the glass plate construct 12 is the thickness direction of the vibrator 26. As an example, the vibrator 26 of this embodiment is a voice coil motor including a coil portion and a magnetic circuit, one of the coil portion and the magnetic circuit being fixed to the connection portion 24, and the other being arranged so as to be movable relative to the connection portion 24. When a current flows through the coil portion, vibration is generated by the interaction between the coil portion and the magnetic circuit, and the glass plate construct 12 vibrates via the connection portion 24 and the mount portion 16. The vibration direction is the thickness direction of the vibrator 26. Note that the vibrator 26 is not limited to a voice coil motor; actuators other than voice coil motors, such as piezoelectric actuators, may be used as long as they are capable of transmitting the desired vibration to the glass plate construct 12.

[0028] (Elastic Deformation Layer 22) An elastic deformation layer 22 is provided on the main surface of the mount portion 16 opposite to the glass plate structure 12 side, and the elastic deformation layer 22 is sandwiched between the mount portion 16 and the connection portion 24.

[0029] The elastic deformation layer 22 is continuously disposed in a range including a connection region V that overlaps with the vibrator 26 when viewed in the thickness direction of the glass plate structure 12. In this embodiment, the elastic deformation layer 22 includes a portion sandwiched between the first extension portion 20 of the mount portion 16 and the second extension portion 27 of the connection portion 24.

[0030] The elastic deformation layer 22 includes at least one of a resin, a rubber, a foam material, and a gel material. The resin of the elastic deformation layer 22 is preferably a hydrocarbon-based, silicone-based, or fluorine-based rubber material, such as EPT (Ethylene Propylene Terpolymer), EPDM (Ethylene Propylene Diene Monomer), urethane, PDMS (Polydimethylsiloxane), acrylic, or FEP (Fluorinated Ethylene Propylene).

[0031] A non-adhesive material or an adhesive material may be used for the elastic deformation layer 22. When an adhesive material is used for the elastic deformation layer 22, the shear strength of the elastic deformation layer 22 is preferably 5.0 MPa or less, more preferably 3.0 MPa or less, even more preferably 1.0 MPa or less, and particularly preferably 0.5 MPa or less, in order to detach the connection part 24 from the mount part 16 when replacing the vibrator 26.

[0032] Furthermore, the thickness of the elastic deformation layer 22 is preferably 0.02 mm or more, more preferably 0.05 mm or more, and even more preferably 0.1 mm or more in order to allow for dimensional errors and distortions of the mount portion 16. Furthermore, the thickness of the elastic deformation layer 22 is preferably 5.0 mm or less, more preferably 3.0 mm or less, and even more preferably 1.0 mm or less in order to effectively transmit the vibration of the vibrator 26 to the mount portion 16.

[0033] Young's modulus E of the elastic deformation layer 22 Ｄ is 1 x 10 ３ [Pa] or more is preferable, and 5 × 10 ３ [Pa] or more is more preferable, and 1 × 10 ４ [Pa] or more is more preferable. Ｄ is 1 x 10 ８ [Pa] or less is preferable, and 5 × 10 ７ [Pa] or less is more preferable, and 1 × 10 ７ [Pa] or less is more preferable.

[0034] As described above, in this embodiment, the elastic deformation layer 22 is sandwiched between the mount portion 16 and the connection portion 24, and therefore dimensional errors and distortions of the mount portion 16 can be reduced by deformation of the elastic deformation layer 22, thereby reducing individual differences. As a result, even if there is variation in the shape of the mount portion 16, variation in the shape of the connection portion 24, or even variation in the fixation state of the vibrator 26, it is possible to reduce variation in the damping ratio when the glass plate structure 12 is vibrated, and desired acoustic characteristics can be easily obtained. Furthermore, by providing the elastic deformation layer 22 and realizing a mount mechanism with a high loss factor, it is possible to improve the damping ratio.

[0035] (Modification 1) Fig. 2 is a cross-sectional side view of a glass diaphragm 10 with a vibrator according to Modification 1. As shown in Fig. 2, in this modification, the shapes of the mount portion 16 and the connection portion 24 are different from those in Fig. 1.

[0036] The mount portion 16 includes a main mount portion 18 disposed in the connection region V and a first extension portion 20 extending outward from the main mount portion 18 (connection region V). The first extension portions 20 extend in different directions, particularly in opposite directions, from the outer peripheral end of the main mount portion 18. Here, the first extension portions 20 are formed to be thicker than the main mount portion 18.

[0037] The connection part 24 is formed so that the part located in the connection region V is thicker than the second extension part 27, and the part located in the connection region V is positioned in a state where it is sandwiched between a pair of first extension parts 20.

[0038] An elastic deformation layer 22 is provided on the main surface of the mount portion 16 opposite to the glass plate construct 12 side, and the elastic deformation layer 22 is sandwiched between the mount portion 16 and the connection portion 24. The elastic deformation layer 22 is also disposed in a state of being sandwiched between the pair of first extension portions 20. In particular, in this modification, the elastic deformation layer 22 is disposed including the main mount portion 18 (connection region V), and the elastic deformation layer 22 may be disposed only in the main mount portion 18 (connection region V).

[0039] In this modification, the first extension portion 20 is formed thick, thereby improving the fastening strength when the first extension portion 20 and the second extension portion 27 are mechanically fastened together.

[0040] (Modification 2) Fig. 3 is a cross-sectional view of the glass diaphragm 10 with a vibrator according to Modification 2, as viewed from the side. As shown in Fig. 3, in this modification, the first extension 20 is not provided in the mount portion 16, and the second extension 27 is not provided in the connection portion 24.

[0041] The mount portion 16 is formed in a substantially circular shape in a plan view, and a first hole portion 16A is formed in the center of the mount portion 16. When a portion of the mount portion 16 is formed from a resin such as plastic, at least the periphery of the screw hole that becomes the first hole portion 16A in the mount portion 16 may be formed from a hard metal such as stainless steel by inserting a helical insert or the like, and the rest of the mount portion 16 may be formed from a soft metal such as aluminum or a resin such as plastic.

[0042] The connection portion 24 has a mechanical fastening portion that connects to the mount portion 16 inside the connection region V. The mechanical fastening portion is exemplified by a male screw portion provided at a position corresponding to the central axis of the mount portion 16.

[0043] An elastic deformation layer 22 is provided on the main surface of the mount 16 opposite the glass plate construct 12 side, and the elastic deformation layer 22 is sandwiched between the mount 16 and the vibrator 26. In this case, the elastic deformation layer 22 is arranged in an area excluding the male screw portion, and has a hole in a portion corresponding to the male screw portion when viewed in the thickness direction of the glass plate construct 12. Furthermore, in this modification, the elastic deformation layer 22 is preferably made of a material having adhesive properties.

[0044] That is, in this modification, the elastic deformation layer 22 can be used as an adhesive for fixing the elastic deformation layer 22 to the mount section 16. Furthermore, the vibrator 26 can be firmly fixed to the mount section 16 by the connection section 24 and the elastic deformation layer 22. Note that the elastic deformation layer 22 may be made of a material that does not have adhesive properties, as long as it can firmly fix the mount section 16 and the connection section 24.

[0045] (Modification 3) Fig. 4 is a cross-sectional view of the glass diaphragm 10 with a vibrator according to Modification 3, as viewed from the side. As shown in Fig. 4, in this modification, the shape of the connection portion 24 is different from that of Modification 2. That is, when viewed in the thickness direction of the glass plate structure 12, the outer edge of the connection portion 24 has a shape that is approximately the same as the outer edge of the mount portion 16.

[0046] The connecting portion 24 is disposed on the main surface of the mount portion 16 via the elastic deformation layer 22. A male screw portion 25 extends from the center of the connecting portion 24 toward the mount portion 16, and the male screw portion 25 is screwed into the first hole portion 16A of the mount portion 16, thereby mechanically fastening the connecting portion 24 to the mount portion 16.

[0047] (Modification 4) Fig. 5 is an enlarged cross-sectional view showing the mount portion 16 and the elastic deformation layer 22 according to Modification 4. As shown in Fig. 5, in this modification, a first uneven surface is formed on the mount portion 16. The first uneven surface is formed on the main surface of the mount portion 16 on the side opposite to the glass plate construct 12 side, and is a surface formed in an uneven shape with respect to an imaginary plane perpendicular to the central axis of the mount portion 16 extending in the thickness direction of the glass plate construct 12.

[0048] The first uneven surface includes protrusions 30 protruding from the mount portion 16 toward the elastic deformation layer 22, and recesses 31 formed between the protrusions 30. The first uneven surface may be formed over the entire connection area, or may be formed over only a portion of the connection area.

[0049] The height of the projections and recesses on the first projection and recess surface is 0.1 μm to 5.0 mm, but is not limited to this range. Ｕ The maximum height T Ｕ The range may be 1.0 μm to 3.0 mm, 10 μm to 1.0 mm, or 20 μm to 0.5 mm.

[0050] The surface of the elastic deformation layer 22 facing the mount section 16 is formed unevenly following the first uneven surface. Specifically, the elastic deformation layer 22 has convex sections 40 and concave sections 41, and the convex sections 40 fit into the recesses 31 of the mount section 16. Furthermore, the protrusions 30 of the mount section 16 fit between the concave sections 41. The aspect ratio (ratio of maximum width to maximum height (depth)) of the convex sections is in the range of 1:100 to 100:1, preferably 1:50 to 50:1, more preferably 1:20 to 20:1, and even more preferably 1:10 to 10:1.

[0051] Here, the maximum thickness T of the elastic deformation layer 22 Ｒ is the maximum height T of the first uneven surface Ｕ It is formed thicker than

[0052] In this modified example, the mount portion 16 that contacts the elastic deformation layer 22 has a first uneven surface, so that the elastic deformation layer 22 follows the first uneven surface by biting into it, thereby being firmly fixed to the mount portion 16 and easily reducing positional deviation.

[0053] 6 is an enlarged cross-sectional view of the mount portion 16 and the elastic deformation layer 22 according to Modification 5. As shown in Fig. 6, in this modification, a first concave-convex surface is formed on the mount portion 16.

[0054] The first uneven surface includes one protrusion 30 that bulges out from the mount portion 16 toward the elastic deformation layer 22. A recess 41 that follows the protrusion 30 is formed on the surface of the elastic deformation layer 22 facing the mount portion 16.

[0055] 7 is an enlarged cross-sectional view of the mount portion 16 and the elastic deformation layer 22 according to Modification 6. As shown in Fig. 7, in this modification, a first concave-convex surface is formed on the mount portion 16.

[0056] The first concave-convex surface is configured to include one depression 31 formed in the mount portion 16. A convex portion 40 that follows the depression 31 is formed on the surface of the elastic deformation layer 22 facing the mount portion 16.

[0057] 8 is an enlarged cross-sectional view of the mount portion 16 and the elastic deformation layer 22 according to Modification 7. As shown in Fig. 8, in this modification, a first concave-convex surface is formed on the mount portion 16.

[0058] The first uneven surface is configured to include two or more protrusions 30 that bulge out from the mount portion 16 toward the elastic deformation layer 22. The protrusions 30 are formed in a continuous wave shape. Recesses 41 that follow the protrusions 30 are formed on the surface of the elastic deformation layer 22 facing the mount portion 16.

[0059] In Modifications 5 to 7, the width (period) of the irregularities is wider than that of the first irregular surface of Modification 4, resulting in large undulations (distortion) on the first irregular surface of the mount portion 16. Modifications 5 to 7 may also include a first irregular surface in which, even if the mount portion 16 is processed into a flat shape, distortion due to manufacturing conditions appears, making it impossible to visually determine the presence or absence of distortion or the magnitude of the distortion (height of the irregularities). Therefore, in Modifications 5 to 7, the inclusion of the elastic deformation layer 22 allows deformation to reduce the height (distortion) of the first irregular surface, and in some cases, high-precision specifications for the shape of the main surface of the mount portion 16 that contacts the elastic deformation layer 22 may not be required. In this way, the inclusion of the elastic deformation layer 22 improves the productivity of the mount portion 16.

[0060] (Variation 8) Fig. 9 is a perspective view of a mount section according to Variation 8. As shown in Fig. 9, in this variation, a first uneven surface is formed on the main mount section 18 of the mount section 16. The first uneven surface is formed to include at least one of convex portions 32 and concave portions 33 formed linearly with a predetermined width. The width of the linear convex portions 32 and concave portions 33 may be constant, or at least a portion of the width may gradually increase or decrease. For example, one of the convex portions 32 and concave portions 33 may be wedge-shaped in a plan view.

[0061] The first uneven surface may be formed only by the convex portions 32, or may be formed only by the concave portions 33. The linear convex portions 32 and concave portions 33 may be formed substantially parallel to each other, or may be formed at an angle to each other. Furthermore, the linear convex portions 32 and concave portions 33 may be formed so as to intersect with each other.

[0062] Furthermore, the first uneven surface may be formed by two or more convex portions 32 and concave portions 33, or the first uneven surface may be formed by only one convex portion 32 or concave portion 33.

[0063] (Modification 9) Fig. 10 is a perspective view of a mount section according to Modification 9. As shown in Fig. 10, in this modification, a first uneven surface is formed on the main mount section 18 of the mount section 16. The first uneven surface is formed to include at least one of linearly formed convex portions 32 and linearly formed concave portions 33. Note that the line width may be constant as described in Modification 8, or may be gradually increased or decreased in part.

[0064] In this modification, three convex portions 32 are formed on the main mount 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 straight shape. Also, some of the convex portions 32 may be formed intermittently.

[0065] Furthermore, in this modified example, five recessed portions 33 are formed in the main mount portion 18, and three recessed portions 33 are formed intermittently in a straight line, but four or more recessed portions 33 may be formed intermittently, or two recessed portions 33 may be formed intermittently.

[0066] 10, two of the five recessed portions 33 are formed intermittently in a curved line, but three or more recessed portions 33 may be formed intermittently in a curved line. In addition, the recessed portions 33 may be formed to have different lengths or the same length.

[0067] In addition, in Figure 10, the first uneven surface is formed by irregularly arranged convex portions 32 and concave portions 33, but the first uneven surface may also be formed by regularly arranged convex portions 32 and concave portions 33.

[0068] (Modification 10) Fig. 11 is a perspective view of a mount section according to Modification 10. As shown in Fig. 11, in this modification, a first uneven surface is formed on the main mount section 18 of the mount section 16. The first uneven surface is formed to include at least one of convex portions 32 and concave portions 33 formed in the shape of circular lines.

[0069] The convex portions 32 are formed as continuous circular lines, but may also be formed as discontinuous circular lines. The concave portions 33 are formed as discontinuous circular lines, but may also be formed as continuous circular lines. In this modification, the line widths of the convex portions 32 and the concave portions 33 may be constant as in modification 8, or may gradually increase or decrease in some areas.

[0070] (Modification 11) Fig. 12 is a perspective view of a mount section according to Modification 11. As shown in Fig. 12, in this modification, a first uneven surface is formed on the main mount section 18 of the mount section 16. The first uneven surface is formed to include at least one of irregularly scattered protrusions 34 and depressions 35.

[0071] Although three protrusions 34 and three recesses 35 are formed on the main mount portion 18, the number of protrusions 34 and recesses 35 is not limited, and only a plurality of protrusions 34 may be formed, or only a plurality of recesses 35 may be formed. Furthermore, the protrusions 34 and recesses 35 may be formed in a regular pattern. Furthermore, the protrusions 34 may include multiple vertices by connecting the lower portions (portions corresponding to the bases) of multiple protrusions 34. Furthermore, the recesses 35 may include multiple bottom portions (portions with minimum values) by connecting the upper portions (shallow portions of the recesses 35) of multiple recesses 35.

[0072] 9 to 12, the first uneven surface may be formed by combining the convex portions 32, concave portions 33, protrusions 34, and depressions 35. For example, in FIG. 12, the main mount portion 18 may include linear convex portions 32 and concave portions 33.

[0073] (Modification 12) Fig. 13 is a perspective view of a mount section according to Modification 12. As shown in Fig. 13, in this modification, a first uneven surface is formed on the main mount section 18 of the mount section 16. The first uneven surface is formed by a convex portion 32 that is substantially H-shaped.

[0074] The convex portions 32 may be formed by connecting a plurality of linear convex portions that intersect with each other. Also, the first uneven surface may be formed by substantially H-shaped concave portions 33 instead of the convex portions 32. Furthermore, part of the H shape may be formed by the concave portions 33. By forming the substantially H-shaped convex portions 32 or concave portions 33 on the first uneven surface, the bending strength of the main mount 18 is improved.

[0075] (Modification 13) Fig. 14 is a perspective view of a mount portion according to Modification 13. As shown in Fig. 14, in this modification, a coating film 36 is laminated on a part of the main mount portion 18 and the first extension portion 20 of the mount portion 16.

[0076] The coating film 36 contains a large number of particles 36A, and the large number of particles 36A form a first uneven surface on the main mount portion 18. Note that, for ease of explanation, the size of the particles 36A is exaggerated in Fig. 14. Furthermore, for ease of explanation, the particles 36A are depicted with approximately regular intervals between them in Fig. 14, but they may be formed with irregular intervals.

[0077] The first uneven surface formed by the particles 36A has an arithmetic surface roughness Ra in accordance with JIS B0601:2001 of 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.

[0078] (Modification 14) Fig. 15 is a cross-sectional view of a glass diaphragm 10 with a vibrator according to Modification 14, viewed from the side. As shown in Fig. 15, in this modification, the shapes of the mount portion 16 and the connection portion 24 are different from those of the embodiment.

[0079] The mount portion 16 includes a main mount portion 18 disposed in the connection region V and a first extension portion 20 extending outward from the main mount portion 18 (connection region V). The first extension portion 20 extends in opposite directions from the outer peripheral end of the main mount portion 18. The connection portion 24 is formed in substantially the same shape as the mount portion 16 when viewed in the thickness direction of the glass plate structure 12, and includes a second extension portion 27 superimposed on the first extension portion 20 of the mount portion 16. The second extension portion 27 extends outward from the connection region V, and the first extension portion 20 and the second extension portion 27 are superimposed and mechanically fixed by fasteners such as bolts 25.

[0080] Here, a first uneven surface is formed on the mount portion 16. The first uneven surface is formed on the main surface of the mount portion 16 opposite the glass plate construct 12 side, and is a surface formed in an uneven shape with respect to an imaginary plane perpendicular to the central axis of the mount portion 16 extending in the thickness direction of the glass plate construct 12. Furthermore, 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 mount portion 16 side, and is a surface formed in an uneven shape with respect to an imaginary plane perpendicular to the central axis of the connection portion 24 extending in the thickness direction of the glass plate construct 12.

[0081] An elastic deformation layer 22 is provided between the mount portion 16 and the connection portion 24. A protrusion 22A that conforms to the first uneven surface is formed on the surface of the elastic deformation layer 22 facing the mount portion 16. A protrusion 22B that conforms to the second uneven surface is formed on the surface of the elastic deformation layer 22 facing the connection portion 24.

[0082] In this modification, the elastic deformation layer 22 conforms to both the first uneven surface and the second uneven surface that contact it, so that it can be more firmly fixed to both the mount portion 16 and the connection portion 24. Note that, although the first uneven surface and the second uneven surface in this modification have been described as having a large number of fine unevennesses as in Modification 4 shown in Fig. 5, this is not limiting. In other words, the combination of the first uneven surface and the second uneven surface may be any of the combinations in Modifications 4 to 13.

[0083] (Modification 15) Fig. 16 is a cross-sectional view of a glass diaphragm with a vibrator 10 according to Modification 15, viewed from the side. As shown in Fig. 16, in this modification, a first adhesive layer 50 is disposed between the connection portion 24 and the elastic deformation layer 22. Furthermore, a second adhesive layer 52 is disposed between the mount portion 16 and the elastic deformation layer 22. Note that either the first adhesive layer 50 or the second adhesive layer 52 may be disposed.

[0084] The first adhesive layer 50 is disposed over the entire area of ​​the connection portion 24, including the second extending portion 27, and may be made of an adhesive, a pressure-sensitive adhesive, or the like, as appropriate, similar to the adhesive layer 14. The pressure-sensitive adhesive may be a sheet-shaped adhesive tape. Alternatively, the first adhesive layer 50 may be made of a sheet-shaped thermosetting resin material or the like.

[0085] The second adhesive layer 52 is disposed over the entire area including the main mount portion 18 and the first extension portion 20, and can be made of the same material as the first adhesive layer 50. Alternatively, the first adhesive layer 50 and the second adhesive layer 52 may be made of different materials.

[0086] In this modification, even if the elastic deformation layer 22 is made of a non-adhesive material, it can be fixed to the mount portion 16 and the connection portion 24. Note that, in this modification as well, the elastic deformation layer 22 may be made of an adhesive material.

[0087] (Modification 16) Fig. 17 is a cross-sectional view of a glass diaphragm 10 with a vibrator according to Modification 16, viewed from the side. As shown in Fig. 17, a mount portion 16 is fixed to one main surface of a glass plate structure 12 via an adhesive layer 14. The mount portion 16 is configured to include a main mount portion 18 and a first extension portion 20.

[0088] The main mount portion 18 includes a portion formed in a substantially circular shape in a plan view of the glass plate structure 12, and arm portions that extend radially outward from the outer edge of the substantially circular shape and are spaced apart from each other. Furthermore, first extension portions 20 are formed at the tips of the arm portions, and the first extension portions 20 are formed to be thicker than the main mount portion 18. Furthermore, each of the three first extension portions 20 is provided with a hole portion 16A.

[0089] A connecting portion 24 is provided on the side of the mount portion 16 opposite to the glass plate construct 12 side. The connecting portion 24 is formed in substantially the same shape as the mount portion 16 when viewed in the plate thickness direction of the glass plate construct 12, and includes a second extending portion 27 superimposed on the first extending portion 20 of the mount portion 16.

[0090] The connecting portion 24 in this modified example is formed to have the same thickness throughout, and the second extending portion 27 has a second hole 24A formed at a position corresponding to the first hole 16A. The second hole 24A penetrates the second extending portion 27 and can be exemplified as an insertion hole through which a bolt 25 is inserted, and the first extending portion 20 and the second extending portion 27 are overlapped and mechanically fixed by a fastener such as the bolt 25.

[0091] An elastic deformation layer 22 is provided on the main surface of the mount portion 16 opposite to the glass plate construct 12 side. The elastic deformation layer 22 is sandwiched between the mount portion 16 and the connection portion 24. In particular, in this modification, the elastic deformation layer 22 is provided between the first extension portion 20 and the second extension portion 27.

[0092] In this modification, the vibrator 26 is disposed in a space surrounded by the connection portion 24 and the mount portion 16. Furthermore, since the vibrator 26 is covered by the connection portion 24, the vibrator 26 is not exposed to the outside. In this modification, the vibrator 26 is not exposed to the outside, so it cannot be directly touched.

[0093] (Modification 17) Fig. 18 is a cross-sectional view of a glass diaphragm 10 with a vibrator according to Modification 17, viewed from the side. As shown in Fig. 18, the mount portion 16 includes a main mount portion 18 and a first extension portion 20 that is thicker than the main mount portion 18.

[0094] A connection portion 24 is provided on the side of the mount portion 16 opposite to the glass plate construct 12. The connection portion 24 is configured to include a second extension portion 27 that does not overlap with the vibrator 26 in a plan view of the glass plate construct 12, and a through hole 24A that penetrates in the plate thickness direction is formed in the second extension portion 27.

[0095] In this modification, a portion of the vibrator 26 is disposed within the space surrounded by the connection portion 24 and the mount portion 16, and the other portion of the vibrator 26 is disposed outside the connection portion 24. In this manner, in this modification, the vibrator 26 can be attached even if it is thick.

[0096] <Experimental Examples> The following examples further illustrate the embodiments of the present disclosure. The materials, dimensions, shapes, and evaluation procedures shown in the following examples can be changed as appropriate without departing from the spirit 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.

[0097] (Glass diaphragm with vibrator) As an example, the structure of the embodiment shown in Fig. 1 was adopted as the glass diaphragm with vibrator 10. The thickness of the elastic deformation layer 22 was set to 1 mm. As a comparative example, a structure was adopted in which the elastic deformation layer 22 was removed from the structure of the embodiment shown in Fig. 1.

[0098] The damping ratio was measured by vibrating the vibrator 26 for the structures of the example and comparative example. 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 to measure the damping ratio. Measurements were carried out three times for each structure, and the results are shown in Table 1 below. The damping ratio ζ in the example and comparative example was calculated by the half-width method, and specifically, the peak frequency when the horizontal axis is frequency is f ０ Then, the frequency width Δf between the (two) points 3 dB below the peak value is calculated, and the attenuation ratio ζ is calculated as "ζ = Δf / (2f ０ )” was calculated using the equation

[0099]

[0100] The results shown in Table 1 show that the structure of the example in which the elastic deformation layer 22 is sandwiched between the mount portion 16 and the connection portion 24 has a larger damping ratio than the structure of the comparative example. As a result, providing the elastic deformation layer 22 improves the damping of sound and improves various characteristics such as transient response (tone burst).

[0101] The above-mentioned features not only provide advantages in the fastening process, but also allow for a mounting configuration with a higher damping ratio than conventional mounting configurations, thereby enabling the glass diaphragm to produce the desired acoustics. While the glass diaphragm with vibrator 10 and the glass diaphragm 11 according to the embodiments and modifications have been described, it goes without saying that they can be implemented in various forms without departing from the spirit and scope of the present disclosure.

[0102] REFERENCE SIGNS LIST 10 Glass diaphragm with vibrator 11 Glass diaphragm 12 Glass plate structure 16 Mounting portion 22 Elastic deformation layer 24 Connection portion 26 Vibrator 30 Protrusion 31 Recess 32 Convex portion 33 Recessed portion 34 Protrusion 35 Recess V Connection region

Claims

1. A glass plate structure; a mount portion fixed to one main surface of the glass plate structure; a connection portion provided on the opposite side of the mount portion from the glass plate construct and to which a vibrator for vibrating the glass plate construct is mechanically attached; an elastic deformation layer provided on a main surface of the mount portion opposite to the glass plate structure; A glass diaphragm having a

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

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

4. 2. The glass vibration plate according to claim 1, wherein a main surface of the mounting portion opposite to the glass plate structure includes a first uneven surface formed in an uneven shape with respect to a virtual plane perpendicular to a central axis of the mounting portion extending in a thickness direction of the glass plate structure.

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

6. The glass diaphragm according to claim 4 , wherein the first uneven surface is formed to include at least one of linearly formed convex portions and linearly formed concave portions.

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

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

9. The glass diaphragm according to claim 8 , wherein the first uneven surface is formed to include at least one of irregularly scattered protrusions and recesses.

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

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 projections and recesses on the first projection and recess surface is 0.1 μm to 5.0 mm.

13. The glass vibration plate according to any one of claims 1 to 7, wherein the main surface of the connection portion on the mounting portion side includes a second uneven surface formed unevenly with respect to a virtual plane perpendicular to the central axis of the connection portion extending in the thickness direction of the glass plate structure.

14. A glass vibration plate as described in any one of claims 1 to 7, comprising at least one of a first adhesive layer arranged between the connection portion and the elastic deformation layer, and a second adhesive layer arranged between the mounting portion and the elastic deformation layer.

15. The glass diaphragm according to any one of claims 1 to 7, wherein the elastic deformation layer has adhesiveness.

16. The mount portion has a Young's modulus E Ｍ But, 1 x 10 ７ The glass diaphragm according to any one of claims 1 to 7, wherein the elastic modulus is [Pa] or more.

17. the mounting portion includes a first extending portion extending outward beyond the connection region, The connection portion includes a second extension portion extending outward from the connection region, The glass diaphragm according to any one of claims 1 to 7, wherein the first extension portion and the second extension portion are overlapped and mechanically fixed to each other.

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 7, wherein the connection portion has a mechanical fastening portion inside the connection region that connects to the mount portion.

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

21. The glass diaphragm according to any one of claims 1 to 7, wherein the elastic deformation layer has a thickness of 0.02 mm to 5.0 mm.

22. The elastic deformation layer has a Young's modulus E Ｄ But, 1 x 10 ３ [Pa] ~ 1 x 10 ８ The glass diaphragm according to any one of claims 1 to 7, wherein the elastic modulus is [Pa].

23. The glass diaphragm according to any one of claims 1 to 7, wherein the elastic deformation layer includes at least one of rubber, a foam material, and a gel material.

24. A glass diaphragm according to any one of claims 1 to 7; The transducer attached to the connection portion; and A glass diaphragm with a vibrator.