Glass vibration plate and glass vibration plate with vibrator

Abstract

The present invention relates to a glass diaphragm comprising: a glass plate structure; a mounting part which is fixed to the glass plate forming body and on which a vibrator that vibrates the glass plate forming body is mounted; and an adhesive layer in contact with the glass plate structure and the mounting portion, the adhesive layer having a first adhesive layer and a second adhesive layer made of different materials, the shear storage elastic modulus of the first adhesive layer at-40 DEG C being 1.0 * 107 Pa or less, and the shear peel strength of the second adhesive layer at 80 DEG C being 0.2 MPa or more.

Description

Technical Field

[0001] The present invention relates to a glass vibration plate and a glass vibration plate with a vibrator. Background Art

[0002] In recent years, a technology has been developed to vibrate various plate-shaped parts such as parts for electronic equipment, window parts for vehicles, and interior parts for transportation equipment such as vehicles to function as speakers. For example, Patent Documents 1 to 5 disclose various structures for transmitting the vibration of an electric vibration exciter (vibrator) to a vibrating plate such as a glass plate.

[0003] Patent Document 1 discloses a structure in which a bottom plate, a base, and an attachment member are sequentially stacked on a main surface of a glass plate, the bottom plate and the base are fixed with a plastic portion covering a portion of the glass plate, and a vibrator is connected to the attachment member on the fixed base.

[0004] Patent Document 1: International Publication No. 2021 / 229179

[0005] Patent Document 2: International Publication No. 2021 / 229180

[0006] Patent Document 3: International Publication No. 2019 / 172076

[0007] Patent Document 4: Japanese Patent Application Publication No. 2010-263512

[0008] Patent Document 5: Japanese Patent Application Publication No. 2009-100223

[0009] However, such a mounting structure for mounting the vibrator on the glass plate may cause the mounting position to shift due to the continuous use of the vibrating vibrator, resulting in a decrease in the sound reproduction quality and the vibrator itself falling off. In addition, in the structure of fixing the bottom plate and the base to the glass plate using a plastic part as in the mounting structure described in Patent Document 1, there are problems such as the structure becoming complicated and it is difficult to stably overcoat the plastic part on the bottom plate and the base. In addition, due to temperature changes, the fixing strength of the plastic part to the bottom plate and the base may decrease. Summary of the invention

[0010] Therefore, an object of the present invention is to provide a glass vibration plate and a glass vibration plate with a vibrator, which can stably mount a vibrator on a glass plate structure, can suppress the degradation of sound quality emitted from the glass vibration plate and the detachment of the vibrator due to positional deviation of the vibrator, and can suppress the reduction of fixing strength due to temperature changes.

[0011] The present invention is constituted by the following structure.

[0012] (1) A glass vibration plate, wherein:

[0013] have:

[0014] Glass plate structure;

[0015] A mounting portion fixed to the glass plate structure and for mounting a vibrator for vibrating the glass plate structure; and

[0016] The adhesive layer is in contact with the glass plate structure and the mounting portion.

[0017] The adhesive layer includes a first adhesive layer and a second adhesive layer made of different materials.

[0018] The shear storage elastic modulus of the first adhesive layer at -40°C is 1.0×10 7 Below Pa,

[0019] The second adhesive layer has a shear peel strength of 0.2 MPa or more at 80°C.

[0020] (2) A glass diaphragm with a vibrator, comprising the glass diaphragm according to (1) above and the vibrator.

[0021] According to the present invention, the vibrator can be stably mounted on the glass plate structure, the quality degradation of the sound emitted from the glass vibration plate due to the positional deviation of the vibrator and the fall-off of the vibrator can be suppressed, and the reduction of the fixing strength due to temperature change can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic top view of a glass diaphragm.

[0023] Figure 2 yes Figure 1 A schematic cross-sectional view of the glass diaphragm taken along line II-II is shown.

[0024] Figure 3 It is a perspective view of a mounting portion and a vibrator fixed to a glass plate structure.

[0025] Figure 4 yes Figure 2 A schematic cross-sectional view taken along line IV-IV of FIG.

[0026] Figure 5 This is a schematic cross-sectional view of a glass diaphragm according to Modification 1.

[0027] Figure 6 This is a schematic cross-sectional view of a glass diaphragm according to Modification 2.

[0028] Figure 7 This is a schematic cross-sectional view of a glass diaphragm according to Modification 3.

[0029] Fig. 8A It is a schematic cross-sectional view along the surface direction of the adhesive layer, showing the arrangement pattern of the first adhesive layer and the second adhesive layer.

[0030] Figure 8B It is a schematic cross-sectional view along the surface direction of the adhesive layer, showing the arrangement pattern of the first adhesive layer and the second adhesive layer.

[0031] Figure 8C It is a schematic cross-sectional view along the surface direction of the adhesive layer, showing the arrangement pattern of the first adhesive layer and the second adhesive layer.

[0032] Fig. 9 This is a perspective view of a test piece for explaining the evaluation method of shear stress.

[0033] Fig.10 Schematic diagram of an adhesive layer showing an adhesive layer formed by combining two adhesives.

[0034] Fig.11 This is a schematic diagram of the structure of a test device for explaining a method for evaluating vibration transmissibility.

[0035] Fig. 12A It is a schematic cross-sectional view of the adhesive layer showing another example of the arrangement pattern of the first adhesive layer and the second adhesive layer.

[0036] Fig. 12B yes Fig. 12A A schematic top view of the adhesive layer is shown. DETAILED DESCRIPTION

[0037] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The glass vibration plate with a vibrator of this embodiment includes a glass vibration plate and a vibrator for vibrating the glass vibration plate, and can be applied to vibrate a glass plate for a vehicle, for example. In the following description, an example of applying the glass vibration plate with a vibrator to a window portion such as a side window of a vehicle is described, but the applicable uses are not limited to this.

[0038] <Overall structure of the glass diaphragm>

[0039] Figure 1 It is a schematic plan view of the glass diaphragm 11 . Figure 2 yes Figure 1 The schematic cross-sectional view of the glass vibration plate 11 taken along the line II-II is shown. Figure 3 It is a perspective view of the mounting portion 17 and the vibrator 13 fixed to the glass plate structure 15 .

[0040] like Figure 1 to Figure 3As shown, the glass diaphragm 11 can mount a vibrator 13 that generates vibrations on a main surface of a glass plate structure 15. Specifically, the glass diaphragm 11 includes a glass plate structure 15, a mounting portion 17, and a connecting portion 19.

[0041] <Structure of glass diaphragm with vibrator>

[0042] The glass vibration plate 100 with a vibrator has a structure in which the vibrator 13 is mounted on the glass vibration plate 11. The vibrator 13 is connected and fixed to the connecting portion 19, and the connecting portion 19 is fixed to the mounting portion 17. The vibrator 13 is fixed to the connecting portion 19 by at least one of mechanical fastening methods such as screws, bolts and nuts, rivets, keys, pins, and adhesives. In addition, the vibrator 13 and the connecting portion 19 may be structures in which different parts are firmly fixed to each other, or they may be structures in which the same part is integrated. The connecting portion 19 is mechanically fixed to the mounting portion 17. The mounting portion 17 is fixed to one main surface of the glass plate structure 15, that is, the first main surface 15a. Thus, the vibrator 13 is mounted on the first main surface 15a of the glass plate structure 15 via the connecting portion 19 and the mounting portion 17.

[0043] For example, when the glass vibration plate 11 is used as a side window of a vehicle, the vibrator 13 is arranged in an area below the waistline BL, that is, in an area on the frame 16 side of a lifting mechanism (not shown). Thus, the sound generated by the glass plate structure 15 can be supplied to the vehicle interior. In addition, when the side window is attached to the vehicle (door), the waistline BL corresponds to the lower side of the opening when the side window is fully closed.

[0044] The vibrator 13 is an excitation device that uses the object in contact as a vibration plate to generate sound from the vibration plate. The glass vibration plate 100 with the vibrator 13 is installed with a vibrator, and the glass vibration plate 11 is vibrated by the drive of the vibrator 13 to generate the desired sound. As the vibrator 13 used here, although not shown in the figure, an exciter that is composed of a coil part electrically connected to an external device, a magnetic circuit part, and an excitation part can be cited. According to the exciter, if an electrical signal of sound from an external device is input to the coil part, vibration is generated in the coil part or the magnetic circuit part through the interaction between the coil part and the magnetic circuit part. The vibration of the coil part or the magnetic circuit part is transmitted to the excitation part, and the excitation part vibrates. In addition, the vibrator 13 is provided with a conductive wire (not shown) for driving the vibrator 13.

[0045] <Glass plate structure>

[0046] The glass plate structure 15 constituting the glass vibration plate 11 has a first main surface 15a and a second main surface 15b. Here, the glass plate structure 15 is exemplified as a single glass plate (single plate glass), but it can also be other forms such as laminated glass in which an intermediate film made of resin, liquid or the like is sandwiched between a pair of glass plates. The thickness of the glass plate structure 15 is preferably 1 mm or more, more preferably 2 mm or more, and further preferably 3 mm or more. In this way, the strength of the glass plate structure 15 can be made sufficient.

[0047] <Installation Department>

[0048] The mounting portion 17 can be formed of materials such as metal materials such as aluminum or aluminum alloy, titanium alloy, magnesium alloy, stainless steel, ceramics, glass, resin materials, carbon fiber and composite materials composed of them. As resin materials, for example, acrylic resins such as polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), polyurethane, polypropylene (PP), ABS resin, polybutylene terephthalate (PBT), polyvinyl chloride sulfide (PPS), polystyrene (PS), nylon 66, etc. can be cited, which can form a structure with excellent formability. In addition, the above-mentioned material is more preferably a fiber reinforced plastic containing glass fiber and carbon fiber. By using the above-mentioned materials, sufficient connection strength can be obtained without cracking in the mounting portion 17. The mounting portion 17 can also be composed of a single material, but it can also be composed of composite materials such as aluminum alloy and stainless steel, or resin material and stainless steel.

[0049] The mounting portion 17 is formed in a circular shape when the glass plate structure 15 is viewed from above. An adhesive layer 20 is provided between the glass plate structure 15 and the mounting portion 17 so as to be in contact with the glass plate structure 15 and the mounting portion 17. The mounting portion 17 is bonded and fixed to the first main surface 15a of the glass plate structure 15 by the adhesive layer 20. The outer edge shape of the mounting portion 17 when the glass plate structure 15 is viewed from above is not limited to a circular shape, but may be any shape such as a polygon.

[0050] The mounting portion 17 has a threaded hole 25 on the side opposite to the fixing side to the glass plate structure 15. The connecting portion 19 provided on the vibrator 13 has a threaded shaft 27, and the threaded shaft 27 is screwed into the threaded hole 25 of the mounting portion 17 bonded and fixed to the glass plate structure 15, so that the connecting portion 19 is fastened to the mounting portion 17 (see Figure 2 and Figure 3 ).

[0051] In this way, the connection part 19 fixed to the vibrator 13 is mechanically fixed to the mounting part 17 bonded to the glass plate structure 15, and the vibrator 13 is stably mounted on the glass plate structure 15. In addition, by loosening the connection part 19 screwed into the mounting part 17, the vibrator 13 (in this case, the component formed by fixing the vibrator 13 and the connection part 19) can be removed from the glass plate structure 15, so that the vibrator 13 can be easily replaced. In addition, the thread structure of the connection part 19 and the mounting part 17 is not limited to the combination of the connection part 19 having a convex threaded part and the mounting part 17 for screwing in having a concave threaded part, and the connection part 19 may have a concave threaded part and the mounting part 17 for screwing in having a convex threaded part. In addition, the fixing structure of the mounting part 17 and the connecting part 19 is not limited to the threaded structure, and it may be a mechanical fastening method such as rivets, keys, pins, etc.

[0052] <Adhesive layer>

[0053] Figure 4 yes Figure 2 A schematic cross-sectional view taken along line IV-IV of FIG.

[0054] like Figure 4 As shown, the adhesive layer 20 between the glass plate structure 15 and the mounting portion 17 includes a first adhesive layer 21 and a second adhesive layer 23. The adhesive layers 20 are made of different materials. The first adhesive layer 21 is arranged in a ring shape along the outer edge of the mounting portion 17, and the second adhesive layer 23 is arranged in the central part of the mounting portion 17. The first adhesive layer 21 and the second adhesive layer 23 are in contact with both the glass plate structure 15 and the mounting portion 17. Thus, the mounting portion 17 is bonded and fixed to the first main surface 15a of the glass plate structure 15 by the first adhesive layer 21 and the second adhesive layer 23. Thus, the mounting portion 17 to which the vibrator 13 or the connecting portion 19 integrated with the vibrator 13 is fixed can be easily fixed to the glass plate structure 15 with a simple structure.

[0055] As the adhesive layer 20 for bonding and fixing the mounting portion 17 to the glass plate structure 15, it is preferable to use an adhesive that can firmly fix the mounting portion 17 relative to the glass plate structure 15. However, if a liquid or gel adhesive that can obtain high bonding strength is used, the adhesive layer 20 becomes thicker, and the excitation vibration from the vibrator 13 is absorbed by the adhesive layer 20, and the acoustic effect may be reduced. Therefore, as the adhesive layer 20, it is preferable to use an adhesive tape that can be bonded with a thinner thickness than a liquid or gel adhesive and has good operability. Examples of the adhesive tape include acrylic, silicone, polyurethane, epoxy silicone, and the like.

[0056] However, the glass vibration plate 11, especially when used as a car glass window, can be used in hot and cold places, so the glass plate structure 15 and the mounting portion 17 are required to be able to maintain a stable fixed state without being affected by temperature changes in the assumed use temperature range of, for example, low temperature range (-40°C) to high temperature range (80°C). Specifically, the vibrator 13 and the mounting portion 17 may be subjected to an instantaneous sudden shear stress, so they are required to be able to withstand a stress of at least 0.2 MPa per unit area in the assumed use temperature range.

[0057] Here, as adhesives such as adhesive tapes that can achieve good acoustic effects due to their thin thickness, there are low-temperature durable types that are excellent in vibration durability in a low-temperature range and high-temperature durable types that are excellent in shear peel strength in a high-temperature range.

[0058] However, low-temperature durable adhesives may soften in high-temperature ranges, causing shear peel strength to decrease and peeling to occur. In addition, high-temperature durable adhesives may become brittle in low-temperature ranges, causing vibration durability to decrease and cracking to occur. In addition, although there are intermediate-temperature durable adhesives, sufficient adhesive strength may not be obtained in the high-temperature range and low-temperature range of the assumed operating temperature range (-40°C to 80°C) of the glass vibration plate 11.

[0059] Therefore, when the glass plate structure 15 and the mounting portion 17 are bonded using any one of a low-temperature durable adhesive, a high-temperature durable adhesive, and an intermediate-temperature durable adhesive, it is difficult to maintain a stable fixed state under temperature changes in the assumed operating temperature range (-40°C to 80°C).

[0060] Therefore, the inventors have discovered that by using in combination a first adhesive layer 21 composed of a low-temperature durable type adhesive and a second adhesive layer 23 composed of a high-temperature durable type adhesive as an adhesive layer 20 for bonding and fixing the glass plate structure 15 and the mounting portion 17, a good acoustic effect can be obtained and a decrease in fixing strength caused by temperature changes in the assumed operating temperature range (-40°C to 80°C) can be suppressed.

[0061] Therefore, in this structural example, the adhesive layer 20 is constructed to include a first adhesive layer 21 and a second adhesive layer 23 composed of different materials. For example, a low-temperature durable type adhesive is used as the first adhesive layer 21, and a high-temperature durable type adhesive is used as the second adhesive layer 23.

[0062] Specifically, the shear storage elastic modulus at -40°C is 1.0×10 7The combination of the first adhesive layer 21 with a shear peel strength of less than 0.2 MPa at 80°C and the second adhesive layer 23 with a shear peel strength of more than 0.2 MPa at 80°C constitutes the adhesive layer 20 for bonding and fixing the glass plate structure 15 and the mounting portion 17. As a result, the glass plate structure 15 and the mounting portion 17 can be firmly fixed regardless of temperature changes, and the vibrator 13 or the component formed by integrating the connecting portion 19 and the vibrator 13 can be stably maintained in the glass plate structure 15 even in hot and cold places. In addition, the shear storage elastic modulus of the first adhesive layer 21 at -40°C is preferably 1.0×10 7 Pa or less, more preferably 7.0×10 6 Pa or less, more preferably 5.0×10 6 Furthermore, the shear peel strength of the second adhesive layer 23 at 80° C. is preferably 0.2 MPa or more, more preferably 0.4 MPa or more, and even more preferably 0.5 MPa or more.

[0063] In particular, the average value of the shear peel strength of the adhesive layer 20 including the first adhesive layer 21 and the second adhesive layer 23 in the range of -40°C to 80°C is preferably 0.2 MPa or more. This allows the fixing structure of the mounting portion 17 to the glass plate structure 15 to be more resistant to temperature changes. In addition, the average value of the shear peel strength of the adhesive layer 20 in the range of -40°C to 80°C is preferably 0.4 MPa or more, and more preferably 0.6 MPa or more.

[0064] Furthermore, in the present structural example, the thickness of the first adhesive layer 21 and the second adhesive layer 23 constituting the adhesive layer 20 is set to 1 μm to 1.0 mm.

[0065] Here, for example, for the adhesive layer 20 composed of an adhesive tape, the thicker the film thickness, the greater the physical force applied, and there is a tendency for the strength to decrease, so in order to improve the strength of the adhesive layer 20, it is desirable to reduce the thickness of the adhesive layer 20. However, for the adhesive, there is a film thickness range that is easiest to stretch or easy to show strength due to the composition of the polymer, the crosslinking density, and the physical entanglement with the complex. In addition, as the adhesive layer 20, it is required to be able to efficiently transmit the vibration of the vibrator 13 to the glass plate structure 15 via the mounting portion 17.

[0066] If the thickness of the first adhesive layer 21 and the second adhesive layer 23 constituting the adhesive layer 20 is set to 1 μm to 1.0 mm as in this structural example, the adhesive strength of the mounting portion 17 relative to the glass plate structure 15 can be sufficiently ensured, and the vibration of the vibrator 13 can be efficiently transmitted to the glass plate structure 15 via the mounting portion 17, and an excellent acoustic effect can be obtained. In addition, the thickness of the adhesive layer 20 is preferably greater than the surface roughness of the glass, more preferably greater than 5 μm, and further preferably greater than 10 μm. In addition, the thickness of the adhesive layer 20 is more preferably less than 0.5 mm, and further preferably less than 0.2 mm.

[0067] In addition, in the glass vibration plate 11 of the present structural example, the loss coefficient tanδ of at least one of the first adhesive layer 21 and the second adhesive layer 23 at -40°C is preferably 0.01 or more. The loss coefficient tanδ is the ratio of the shear storage elastic modulus to the shear loss elastic modulus. The larger the loss coefficient tanδ, the more shock absorption is possible. Therefore, for at least one of the first adhesive layer 21 and the second adhesive layer 23, if the loss coefficient tanδ at -40°C is set to 0.01 or more, the impact resistance in cold regions is particularly improved, and the stable fixing state of the mounting portion 17 relative to the glass plate structure 15 can be maintained more well. In addition, the loss coefficient tanδ of at least one of the first adhesive layer 21 and the second adhesive layer 23 at -40°C is more preferably 0.5 or more, and more preferably 0.1 or more. Moreover, the loss coefficient tanδ of both the first adhesive layer 21 and the second adhesive layer 23 at -40°C is preferably 0.01 or more, more preferably 0.02 or more, and more preferably 0.05 or more.

[0068] In this configuration example, the thickness of the first adhesive layer 21 is substantially the same as that of the second adhesive layer 23. Thus, the attachment portion 17 can be bonded and fixed to the glass plate structure 15 by the first adhesive layer 21 and the second adhesive layer 23 in a balanced manner.

[0069] In addition, when the surface area of ​​the first adhesive layer 21 in contact with the glass plate structure 15 is S1 and the surface area of ​​the second adhesive layer 23 in contact with the glass plate structure 15 is S2, it is preferable that S1:S2 is set to a ratio that satisfies the range of 1:0.01 to 1:100. In this way, the surface areas of the first adhesive layer 21 and the second adhesive layer 23 in contact with the glass plate structure 15 can be set to an appropriate ratio, and the mounting portion 17 can be well bonded to the glass plate structure 15 through the first adhesive layer 21 and the second adhesive layer 23. In addition, for S1:S2, since it is assumed to be used in a wide temperature environment, it is more preferable if S1 and S2 are close in area ratio. For the above reasons, it is more preferable to satisfy the ratio in the range of 1:0.1 to 1:10, further preferably to satisfy the ratio in the range of 1:0.2 to 1:5, and particularly preferably to satisfy the ratio in the range of 1:0.5 to 1:2.

[0070] The total area of ​​the surface area S1 of the first adhesive layer 21 in contact with the glass plate structure 15 and the surface area S2 of the second adhesive layer 23 in contact with the glass plate structure 15 is preferably 100 mm. 2 In this way, the surface area of ​​the first adhesive layer 21 and the second adhesive layer 23 in contact with the glass plate structure 15 can be sufficiently ensured, and the mounting portion 17 can be well bonded and fixed to the glass plate structure 15 through the first adhesive layer 21 and the second adhesive layer 23. In addition, the total area of ​​the surface area S1 of the first adhesive layer 21 in contact with the glass plate structure 15 and the surface area S2 of the second adhesive layer 23 in contact with the glass plate structure 15 is more preferably 200 mm 2 More than 400 mm is more preferred 2 On the other hand, from the perspective of increasing the weight of the mounting portion 17 due to the excessive area occupied by the mounting portion 17, the total area of ​​the surface area S1 of the first adhesive layer 21 in contact with the glass plate structure 15 and the surface area S2 of the second adhesive layer 23 in contact with the glass plate structure 15 is preferably 10000 mm 2 Below, more preferably 5000mm 2 Below, more preferably 2000mm 2 the following.

[0071] In addition, when the glass plate structure 15 is viewed from above, the first adhesive layer 21 is arranged in a ring shape along the outer edge of the mounting portion 17, and the second adhesive layer 23 is arranged in the center of the mounting portion 17. Therefore, when the glass plate structure 15 is viewed from above, the center of gravity G of the mounting portion 17 coincides with the second adhesive layer 23 (see FIG. Figure 4). In addition, when the glass plate structure 15 is viewed from above, the second adhesive layer 23 that coincides with the center of gravity G of the mounting portion 17 is arranged in a circular shape with the center of gravity G of the mounting portion 17 as the center. Therefore, the second adhesive layer 23 is arranged in a region (first region) that is point-symmetrical with respect to the center of gravity G of the mounting portion 17. And, when the glass plate structure 15 is viewed from above, the first adhesive layer 21 is arranged in a ring shape along the outer edge of the mounting portion 17 in a manner surrounding the second adhesive layer 23. In this case, the first adhesive layer 21 may also be arranged in a region (second region) that is point-symmetrical with respect to the center of gravity G of the mounting portion 17. In the present embodiment, it is arranged in a region that is point-symmetrical. Here, both the first region and the second region are point-symmetrical with respect to the center of gravity G of the mounting portion 17, but at least one of them is point-symmetrical with respect to the center of gravity G. It is preferred if both are point-symmetrical with respect to the center of gravity G.

[0072] By configuring the first adhesive layer 21 and the second adhesive layer 23 in this way, the adhesive forces of the first adhesive layer 21 and the second adhesive layer 23 are evenly applied between the glass plate structure 15 and the mounting portion 17. As a result, the mounting portion 17 can be bonded and fixed to the glass plate structure 15 in a more even manner. In addition, as described above, the state in which the first adhesive layer 21 and the second adhesive layer 23 form each region in a point-symmetrical manner with respect to the center of gravity G of the mounting portion 17 is not limited to the case of complete point symmetry, and a slight deviation can be allowed as long as the shape can be recognized as point symmetry by visual observation.

[0073] In addition, in the above-mentioned structural example, the case of using the mounting portion 17 that is circular when viewed from above is illustrated, but the mounting portion 17 may also be a polygonal shape when viewed from above, such as a triangle or a quadrilateral, or may be any shape that includes a curve in part, and is not limited to a polygon. In addition, when the mounting portion 17 is in any shape when the glass plate structure 15 is viewed from above, the adhesive layer 20 may have an outer edge that is the same shape as the outer edge of the mounting portion 17, or may have a portion that is arranged at an inner side than the outer edge of the mounting portion 17. In this case, it is also preferred that the first adhesive layer 21 and the second adhesive layer 23 included in the adhesive layer 20 form each region in a point-symmetrical manner with respect to the center of gravity G of the mounting portion 17.

[0074] In addition, the configuration positions of the first adhesive layer 21 and the second adhesive layer 23 arranged between the glass plate structure 15 and the mounting portion 17 can also be reversed. In this case, the adhesive force brought by the first adhesive layer 21 and the second adhesive layer 23 can be evenly applied between the glass plate structure 15 and the mounting portion 17.

[0075] Furthermore, the adhesive layer 20 may also include a third adhesive layer (not shown) instead of just the first adhesive layer 21 and the second adhesive layer 23. In this case, the third adhesive layer may be an adhesive layer having physical properties different from those of the first adhesive layer 21 and the second adhesive layer 23, or may be an adhesive layer that is the same as the first adhesive layer 21 or the second adhesive layer 23. In the case where the third adhesive layer is different from the first adhesive layer 21 and the second adhesive layer 23, it becomes easy to adjust the fixing strength caused by the temperature change at -40°C to 80°C. In addition, in the case where the third adhesive layer is an adhesive layer of the same material as the first adhesive layer 21 or the second adhesive layer 23, it is configured separately from the adhesive layer of the same material. Furthermore, in the case where the adhesive layer 20 includes a third adhesive layer (not shown), the first adhesive layer 21, the second adhesive layer 23 and the third adhesive layer are also preferably formed in such a way that each region is point-symmetrical with respect to the center of gravity G of the mounting portion 17.

[0076] The fixing structure of the glass plate structure 15 and the attachment portion 17 in the glass diaphragm 11 of the present structural example described above is an example, and can be changed to various structures.

[0077] Hereinafter, a modification of the fixing structure between the glass plate structure 15 and the attachment portion 17 will be described. In the following description, the same or corresponding parts or components are denoted by the same or corresponding reference numerals to omit duplicate descriptions.

[0078] (Variant 1)

[0079] Figure 5 It is a schematic cross-sectional view of the glass diaphragm 11 according to the first modification.

[0080] like Figure 5 As shown, in the glass vibration plate 11 of the modification example 1, a gap is provided throughout the circumferential direction between the second adhesive layer 23 arranged at the central portion of the mounting portion 17 and the first adhesive layer 21 arranged in a ring shape along the outer edge of the mounting portion 17. Thus, the first adhesive layer 21 and the second adhesive layer 23 have portions separated from each other. In the glass vibration plate 11 of the modification example 1, since the first adhesive layer 21 and the second adhesive layer 23 have portions separated from each other, even if the volume increases due to thermal expansion of at least one of the first adhesive layer 21 and the second adhesive layer 23 due to temperature changes, it is easy to suppress the generation of stress caused by the contact and mutual interference of the first adhesive layer 21 and the second adhesive layer 23.

[0081] (Variant 2)

[0082] Figure 6 It is a schematic cross-sectional view of the glass diaphragm 11 according to the second modification.

[0083] like Figure 6As shown in FIG. 1 , in the glass vibrating plate 11 of the second modification, the mounting portion 17 has an enlarged diameter portion 31 on the fixing side to be fixed to the glass plate structure 15. Thus, the mounting portion 17 has a step 31a toward the glass plate structure 15. When the glass plate structure 15 is viewed from above, the mounting portion 17 of such a shape can make the area on the glass plate structure 15 side larger than the area on the side separated from the glass plate structure 15.

[0084] In the glass diaphragm 11 of this modification 2, the area of ​​the fixing side of the mounting portion 17 fixed to the glass plate structure 15 can be increased, and the bonding strength of the mounting portion 17 to the glass plate structure 15 by the first adhesive layer 21 and the second adhesive layer 23 can be increased.

[0085] In addition, in the glass vibration plate 11 of variant example 2, the fixed side of the mounting portion 17 fixed to the glass plate structure 15 is enlarged to have a shape with a step difference 31a, but the mounting portion 17 can also be a frustum of cones that gradually expands toward the glass plate structure 15. In this case, the area of ​​the fixed side of the mounting portion 17 fixed to the glass plate structure 15 can also be increased.

[0086] (Variant 3)

[0087] Figure 7 It is a schematic cross-sectional view of the glass diaphragm 11 according to the third modification.

[0088] like Figure 7 As shown, in the glass vibration plate 11 of the modification example 3, the mounting portion 17 has a recess 33 in the central portion. Moreover, the first adhesive layer 21 is arranged in a ring shape along the outer edge of the mounting portion 17, and is arranged on the inner peripheral surface and the bottom surface of the recess 33 of the mounting portion 17. In addition, the second adhesive layer 23 is arranged in the recess 33 of the mounting portion 17 where the first adhesive layer 21 is arranged on the inner peripheral surface and the bottom surface. Thus, the first adhesive layer 21 and the second adhesive layer 23 overlap in the thickness direction of the recess 33 of the mounting portion 17. In this modification example 3, the outer edge portion of the mounting portion 17 can be bonded to the glass plate structure 15 by the first adhesive layer 21, and the central portion of the mounting portion 17 can be bonded by the first adhesive layer 21 and the second adhesive layer 23 overlapping each other.

[0089] Next, various arrangement modes of the first adhesive layer 21 and the second adhesive layer 23 arranged between the glass plate structure 15 and the attachment portion 17 will be described.

[0090] Figure 8A to Figure 8C It is a schematic cross-sectional view along the surface direction of the adhesive layer, showing the arrangement pattern of the first adhesive layer and the second adhesive layer.

[0091] exist Fig. 8AIn the arrangement mode shown, the second adhesive layer 23 is arranged in a straight line along the radial direction passing through the center of gravity G of the mounting portion 17 in a plan view relative to the mounting portion 17, and the first adhesive layer 21 is arranged in a portion other than the portion where the second adhesive layer 23 is arranged.

[0092] exist Figure 8B In the arrangement mode shown, the second adhesive layer 23 is arranged in a cross shape with respect to the mounting portion 17 centered at the center of gravity G of the mounting portion 17 in a plan view, and the first adhesive layer 21 is arranged in a portion other than the portion where the second adhesive layer 23 is arranged.

[0093] exist Figure 8C In the configuration pattern shown, multiple (4 in this example) circular first adhesive layers 21 are arranged at equal intervals around the center of gravity G of the mounting portion 17 relative to the mounting portion 17, and the second adhesive layer 23 is arranged in the portion other than the portion where the above-mentioned first adhesive layer 21 is arranged.

[0094] exist Figure 8A to Figure 8C In the case of the arrangement mode shown, when the glass plate structure 15 is viewed from above, the center of gravity G of the mounting portion 17 is also arranged at a position that overlaps with the second adhesive layer 23. In addition, the second adhesive layer 23 is arranged in a region (first region) that is point-symmetrical with respect to the center of gravity G of the mounting portion 17. Furthermore, when the glass plate structure 15 is viewed from above, the first adhesive layer 21 is arranged in a region (second region) that is point-symmetrical with respect to the center of gravity G of the mounting portion 17.

[0095] Moreover, if Figure 8A to Figure 8C By arranging the first adhesive layer 21 and the second adhesive layer 23 as shown, the adhesive forces of the first adhesive layer 21 and the second adhesive layer 23 can be evenly applied between the glass plate structure 15 and the mounting portion 17. Thus, the mounting portion 17 can be bonded and fixed to the glass plate structure 15 in a more even manner.

[0096] In addition, Figure 8A to Figure 8C In the arrangement mode shown, the arrangement positions of the first adhesive layer 21 and the second adhesive layer 23 may be reversed. In this case, the adhesive forces of the first adhesive layer 21 and the second adhesive layer 23 can be evenly applied between the glass plate structure 15 and the attachment portion 17 .

[0097] <Evaluation of Adhesive Layer>

[0098] The shear storage elastic modulus and loss factor of various adhesive layers formed by adhesive tapes were measured, and the shear stress and vibration transmissibility were evaluated. In the following evaluations, Test Examples 1 to 6 and 8 to 9 are comparative examples, and Test Examples 7 and 10 are examples.

[0099] (Shear storage elastic modulus and loss coefficient)

[0100] The shear storage modulus was measured for Adhesive A composed of a high-temperature durable adhesive tape, Adhesive B composed of an intermediate-temperature durable adhesive tape, and Adhesive C composed of a low-temperature durable adhesive tape. In addition, for the measurement of the shear storage modulus and the loss coefficient, the shear mode at -40°C, 25°C, and 80°C was measured at 1 Hz using a dynamic viscoelasticity measuring device (DVA-225, manufactured by IT Measurement and Control Co., Ltd.). The loss coefficient of each type of adhesive A to C was measured at -40°C. Table 1 shows the measurement results of the shear storage modulus of each type of adhesive A to C.

[0101] [Table 1]

[0102] Table 1

[0103] temperature Adhesive A Adhesive B Adhesive C 80℃ <![CDATA[3.0×10 4 Well]]> <![CDATA[1.0×10 4 Well]]> <![CDATA[7.7×10 3 Well]]> 25℃ <![CDATA[5.5×10 4 Well]]> <![CDATA[1.2×10 4 Well]]> <![CDATA[3.2×10 4 Well<!-- 8 --> ]]> -40℃ <![CDATA[1.3×10 7 Well]]> <![CDATA[1.1×10 7 Well]]> <![CDATA[5.0×10 6 Well]]>

[0104] As shown in Table 1, the shear storage elastic modulus at -40°C for Adhesive A is 1.3×10 7 Pa, adhesive B is 1.1×10 7 That is, it is expected that the shear storage elastic modulus of both the adhesive A and the adhesive B becomes smaller than 1.0×10 7 Pa is large and becomes brittle. In contrast, the shear storage elastic modulus of adhesive C at -40°C is 1.0×10 7 Pa below 5.0×10 6 Pa, it can be seen that sufficient flexibility can be obtained even in a low temperature range (-40°C).

[0105] In addition, the loss coefficient tanδ measured at -40°C was 0.06 for Adhesive A, 0.17 for Adhesive B, and 0.26 for Adhesive C. That is, the loss coefficient tanδ at -40°C of Adhesives A to C was 0.01 or more, confirming that sufficient impact resistance was obtained even in cold regions.

[0106] (Evaluation of shear stress)

[0107] (1) Evaluation method

[0108] Fig. 9 This is a perspective view of a test piece for explaining the evaluation method of shear stress.

[0109] like Fig. 9As shown, an adhesive layer 105 of test examples 1 to 7 as the evaluation object is sandwiched between a glass plate 101 with a width of 20 mm, a length of 30 mm, and a thickness of 3 mm and an aluminum plate (A6061) 103, and a load of 2 kg is applied in the thickness direction and left to stand for 24 hours to allow the glass plate 101 and the aluminum plate 103 to bond.

[0110] In order to simulate instantaneous stress between the glass plate 101 and the aluminum plate 103 bonded by the adhesive layer 105, a shear force was applied at a speed of 300 mm / min, and the stress when the adhesive layer 105 underwent cohesive failure and the glass plate 101 and the aluminum plate 103 peeled off was measured as the shear stress. The shear stress was measured 10 times at -40°C, 25°C, and 80°C, and the average value was used as the shear peeling strength in each of Test Examples 1 to 7. Among them, the case where the interface peeling of the adhesive layer 105 and the peeling of the glass plate 101 and the aluminum plate 103 occurred due to the application of shear force was considered a failure. The shear stress was measured using an autograph (AGX-V, manufactured by Shimadzu Corporation).

[0111] (2) Test Examples 1 to 7 used as Adhesive Layer 105

[0112] Test Example 1: Adhesive A with a film thickness of 0.05 mm

[0113] Test Example 2: Adhesive A with a film thickness of 0.25 mm

[0114] Test Example 3: Adhesive B with a film thickness of 0.05 mm

[0115] Test Example 4: Adhesive B with a film thickness of 0.30 mm

[0116] Test Example 5: Adhesive C with a film thickness of 0.05 mm

[0117] Test Example 6: Adhesive C with a film thickness of 0.40 mm

[0118] Test Example 7: Combination of Adhesive A with a film thickness of 0.05 mm and Adhesive C with a film thickness of 0.05 mm

[0119] Fig.10 1 is a schematic diagram showing an adhesive layer 105 formed by combining two types of adhesives A and B.

[0120] like Fig.10 As shown, in Test Example 7 in which Adhesive A and Adhesive C are combined, long strips of Adhesive A and Adhesive C are alternately arranged to form Adhesive layer 105. The area ratio (S1:S2) of Adhesive A to Adhesive C is 1:1.

[0121] (3) Evaluation results

[0122] Table 2 shows the evaluation results.

[0123] [Table 2]

[0124] Table 2

[0125] Test Example 1 Test Example 2 Test Example 3 Test Example 4 Test Example 5 Test Example 6 Test Example 7 Film thickness 0.05mm 0.25mm 0.05mm 0.30mm 0.05mm 0.40mm 0.05mm 80℃ 0.70MPa 0.46MPa 0.16MPa 0.10MPa 0.12MPa 0.06MPa 0.73MPa 25℃ 0.95MPa 0.88MPa 0.90MPa 0.76MPa 0.40MPa 0.25MPa 0.99MPa -40℃ Interface peeling Interface peeling Interface peeling Interface peeling 1.20MPa 0.45MPa 1.21MPa average value - - - - 0.57MPa 0.25MPa 0.98MPa

[0126] As shown in Table 2, in Test Examples 1 and 2 of Adhesive A composed of high temperature durable adhesive tape, the shear peel strengths at 80°C were 0.70 MPa and 0.46 MPa, respectively, indicating sufficient durability. However, in both Test Examples 1 and 2, interface peeling occurred at -40°C and failed.

[0127] In Test Examples 3 and 4 of Adhesive B composed of medium temperature durable adhesive tape, the shear peel strengths at 80°C were 0.16 MPa and 0.10 MPa, respectively, and sufficient durability was not obtained. In addition, in both Test Examples 3 and 4, interface peeling occurred at -40°C and failed.

[0128] In Test Examples 5 and 6 of Adhesive C composed of a low-temperature durable adhesive tape, the shear peel strengths at 80°C were 0.12 MPa and 0.06 MPa, respectively, indicating insufficient durability. However, in Test Example 5.6, the shear peel strengths at -40°C were 1.2 MPa and 0.45 MPa, respectively, indicating sufficient durability.

[0129] In contrast, in Test Example 7, which is a combination of Adhesive A and Adhesive C, the shear peel strength is 0.73 MPa at 80°C and 1.21 MPa at -40°C. Thus, in Test Example 7, sufficient shear peel strength is obtained over the entire temperature range. In addition, in Test Example 7, the flexibility in the low temperature range is also demonstrated by the shear storage elastic modulus of 1.0×10 7 Pa or less and the binder C is fully supplemented (see Table 1).

[0130] In addition, the average values ​​of the shear peel strength (three values) at 80°C, 25°C, and -40°C in Test Examples 5 to 7 where no interface peeling occurred were 0.57 MPa for Test Example 5, 0.25 MPa for Test Example 6, and 0.98 MPa for Test Example 7. Thus, among Test Examples 5 to 7 where no interface peeling occurred, the average value of the shear peel strength in the range of -40°C to 80°C of Test Example 7, which was a combination of Adhesive A and Adhesive C, was higher than that of Test Examples 5 and 6, which were composed of Adhesive C of a low-temperature durable type adhesive tape.

[0131] The average value of the shear peel strength in the range of -40°C to 80°C here is defined as the average value of the shear peel strengths at three points, 80°C, 25°C, and -40°C, as described above, and is not significantly different from the average value based on temperatures exceeding three points.

[0132] As a result of the above shear stress evaluation, it was found that when the shear storage elastic modulus at -40°C was set to 1.0×10 7 The glass plate structure 15 and the mounting portion 17 are bonded and fixed by the adhesive layer 20 composed of the first adhesive layer 21 composed of the adhesive C with a shear peel strength of 0.2 MPa or less at 80°C and the second adhesive layer 23 composed of the adhesive A with a shear peel strength of 0.2 MPa or more at 80°C. Therefore, the glass plate structure 15 and the mounting portion 17 can be firmly fixed regardless of the temperature change in the assumed use temperature range (-40°C to 80°C). As a result, the vibrator 13 or the component in which the connecting portion 19 and the vibrator 13 are integrated can be stably mounted on the glass plate structure 15 even in hot or cold places, and the quality of the sound emitted from the glass vibration plate 11 can be reduced due to the positional deviation of the vibrator 13, and the vibrator 13 can be prevented from falling off.

[0133] (Evaluation of vibration transmissibility)

[0134] (1) Evaluation method

[0135] Fig.11 This is a schematic diagram of the structure of a test device for explaining a method for evaluating vibration transmissibility.

[0136] like Fig.11 As shown in the figure, a mounting portion 115 is bonded to one main surface 111a of a glass plate structure 111 made of laminated glass via an adhesive layer 113, and an actuator 117 is mounted on the mounting portion 115. A signal is input to the actuator 117 to vibrate at 50 Hz, and the vibration is measured by an acceleration sensor 119 mounted on a main surface 111b of the glass plate structure 111 on the opposite side to the mounting side of the mounting portion 115. Then, a vibration transmission delay consisting of the difference between the measurement signal and the output signal is obtained.

[0137] As the glass plate structure 111, laminated glass was used in which an intermediate layer of 0.76 mm thick made of polyvinyl butyral (PVB) was sandwiched between two glass plates of 200 mm in width, 300 mm in length and 1.8 mm in thickness.

[0138] (2) Test Examples 8 to 10 used as Adhesive Layer 113

[0139] Test Example 8: Adhesive A with a film thickness of 0.05 mm

[0140] Test Example 9: Adhesive A with a film thickness of 0.50 mm

[0141] Test Example 10: Combination of Adhesive A with a film thickness of 0.05 mm and Adhesive C with a film thickness of 0.05 mm

[0142] In Test Example 10 in which Adhesive A and Adhesive C were combined, Adhesive A and Adhesive C in long strips were alternately arranged to form Adhesive layer 113 , and the area ratio of Adhesive A to Adhesive C was set to 1:1.

[0143] (3) Evaluation results

[0144] Table 3 shows the evaluation results.

[0145] [Table 3]

[0146] Table 3

[0147] Film thickness Vibration transmission delay Test Example 8 0.05mm 17.09ms Test Example 9 0.50mm 21.01ms Test Example 10 0.05mm 17.11ms

[0148] As shown in Table 3, in Test Example 8 composed of Adhesive A with a film thickness of 0.05 mm, the vibration transmission delay was suppressed to 17.09 ms. In contrast, in Test Example 9 composed of Adhesive A with a film thickness of 0.50 mm, the vibration transmission delay was 21.01 ms. That is, it can be seen that as the film thickness increases, the influence of the dynamic viscoelasticity of Adhesive A increases, and the vibration is absorbed.

[0149] In addition, in Test Example 10 in which the film thickness was 0.05 mm, which was formed by combining Adhesive A and Adhesive C, the vibration transmission delay was also suppressed to 17.11 mm. That is, it can be seen that since the film thickness of the adhesive greatly affects the vibration transmission delay, even in the case of Test Example 10 in which Adhesive A and Adhesive C were combined, the vibration transmission delay was sufficiently suppressed if the film thickness was thin.

[0150] Thus, the present invention is not limited to the above-mentioned embodiments, and the mutual combination of the various structures of the embodiments, the changes and applications made by those skilled in the art based on the description in the specification and the known technology are also intended by the present invention and are included in the scope of protection required.

[0151] For example, in Figure 5 In the modification example 1 shown, the glass vibration plate 11 is described in which the first adhesive layer 21 and the second adhesive layer 23 have mutually separated portions. However, in this case, the arrangement pattern of the first adhesive layer 21 and the second adhesive layer 23 is not limited. As another example of the arrangement pattern, it is also possible to Fig. 12A , Fig. 12B The schematic cross-sectional view and the schematic top view of the adhesive layer are shown in the figure. Fig. 12BThe top view shape, size, and spacing of the first adhesive layer 21 and the second adhesive layer 23 shown in FIG. 2 are also examples. Fig. 12A , a state in which the vibrator 13 (a component in which the vibrator 13 and the connection portion 19 are fixed) is not fastened to the mounting portion 17 is shown.

[0152] As described above, this specification discloses the following matters.

[0153] (1) A glass vibration plate, wherein:

[0154] have:

[0155] Glass plate structure;

[0156] A mounting portion fixed to the glass plate structure and for mounting a vibrator for vibrating the glass plate structure; and

[0157] The adhesive layer is in contact with the glass plate structure and the mounting portion.

[0158] The adhesive layer includes a first adhesive layer and a second adhesive layer made of different materials.

[0159] The shear storage elastic modulus of the first adhesive layer at -40°C is 1.0×10 7 Below Pa,

[0160] The second adhesive layer has a shear peel strength of 0.2 MPa or more at 80°C.

[0161] According to the glass diaphragm of this structure, the glass plate structure and the mounting portion to be mounted on the connection portion fixed to the oscillator can be easily fixed with a simple structure by the adhesive layer disposed between the glass plate structure and the mounting portion.

[0162] Furthermore, the first adhesive layer and the second adhesive layer constituting the adhesive layer are made of different materials, and the shear storage elastic modulus of the first adhesive layer at -40°C is 1.0×10 7 Pa or less, and the shear peel strength of the second adhesive layer at 80°C is 0.2 MPa or more. Therefore, regardless of temperature changes, the strong fixing strength between the glass plate structure and the mounting portion can be maintained. As a result, even in hot and cold places, the vibrator or the component formed by integrating the connecting portion and the vibrator can be stably mounted on the glass plate structure, and the quality of the sound emitted from the glass vibration plate due to the positional deviation of the vibrator and the fall-off of the vibrator can be suppressed.

[0163] (2) The glass diaphragm according to (1), wherein:

[0164] The first adhesive layer and the second adhesive layer are in contact with both the glass plate structure and the attachment portion.

[0165] According to the glass diaphragm having this structure, the attachment portion can be satisfactorily fixed to the glass plate structure by the first adhesive layer and the second adhesive layer that are in contact with both the glass plate structure and the attachment portion.

[0166] (3) The glass diaphragm according to (1) or (2), wherein:

[0167] The first adhesive layer and the second adhesive layer have portions separated from each other.

[0168] According to the glass vibration plate of this structure, since the first adhesive layer and the second adhesive layer have separated portions from each other, even if thermal expansion of the first adhesive layer and the second adhesive layer occurs due to temperature changes, the generation of stress caused by interference between the first adhesive layer and the second adhesive layer can be suppressed.

[0169] (4) The glass diaphragm according to any one of (1) to (3), wherein:

[0170] The attachment portion has a step toward the glass plate structure.

[0171] According to the glass vibration plate of this structure, by providing a step difference on the mounting portion toward the glass plate forming body, the area of ​​the mounting portion fixed to the glass plate forming body can be easily expanded, and the bonding strength of the mounting portion to the glass plate forming body brought by the first adhesive layer and the second adhesive layer can be improved.

[0172] (5) The glass diaphragm according to any one of (1) to (4), wherein:

[0173] At least one of the first adhesive layer and the second adhesive layer has a loss coefficient tan δ of 0.01 or more at -40°C.

[0174] According to the glass vibration plate of this structure, since at least one of the first adhesive layer and the second adhesive layer has a loss coefficient tanδ of 0.01 or more at -40°C, the impact resistance in cold regions can be improved and the mounting portion can be more firmly fixed to the glass plate structure.

[0175] (6) The glass diaphragm according to any one of (1) to (5), wherein:

[0176] The average value of the shear peel strength of the adhesive layer in the range of -40°C to 80°C is 0.2 MPa or more.

[0177] According to the glass diaphragm of this structure, since the average value of the shear peel strength of the adhesive layer in the range of -40°C to 80°C is 0.2 MPa or more, the fixing structure of the attachment portion to the glass plate structure can be made more resistant to temperature changes.

[0178] (7) The glass diaphragm according to any one of (1) to (6), wherein:

[0179] The thickness of the first adhesive layer and the thickness of the second adhesive layer are 1 μm to 1.0 mm.

[0180] According to the glass vibration plate of this structure, since the thickness of the first adhesive layer and the thickness of the second adhesive layer are 1μm to 1.0mm, the bonding strength of the mounting portion relative to the glass plate structure can be fully ensured, and the vibration of the vibrator can be efficiently transmitted to the glass plate structure via the mounting portion, thereby improving the acoustic effect.

[0181] (8) The glass vibration plate according to (7), wherein:

[0182] The thickness of the first adhesive layer is substantially the same as that of the second adhesive layer.

[0183] According to the glass diaphragm of this structure, since the thickness of the first adhesive layer and the second adhesive layer are substantially the same, the attachment portion can be bonded and fixed to the glass plate structure in a balanced manner by the first adhesive layer and the second adhesive layer.

[0184] (9) The glass diaphragm according to any one of (1) to (8), wherein:

[0185] The ratio of the surface area S1 of the first adhesive layer to the surface area S2 of the second adhesive layer when the glass plate structure is viewed in a plan view is in the range of 1:0.01 to 1:100.

[0186] According to the glass diaphragm of this structure, the surface areas of the first and second adhesive layers in contact with the glass plate structure can be adjusted to an appropriate ratio, and the attachment portion can be well bonded and fixed to the glass plate structure by the first and second adhesive layers.

[0187] (10) The glass diaphragm according to (9), wherein:

[0188] The total area of ​​the surface area S1 and the surface area S2 is 100 mm 2 above.

[0189] According to the glass diaphragm of this structure, the surface areas of the first and second adhesive layers in contact with the glass plate structure can be sufficiently ensured, and the attachment portion can be well bonded and fixed to the glass plate structure by the first and second adhesive layers.

[0190] (11) The glass diaphragm according to any one of (1) to (10), wherein:

[0191] The center of gravity of the mounting portion when the glass plate structure is viewed from above coincides with one of the first adhesive layer and the second adhesive layer.

[0192] The one adhesive layer is arranged in the first region which is point-symmetrical with respect to the center of gravity.

[0193] According to the glass vibration plate of this structure, when the glass plate structure is viewed from above, one of the first adhesive layer and the second adhesive layer coincides with the center of gravity of the mounting portion and is arranged in the first region that is point-symmetrical with respect to the center of gravity of the mounting portion. Therefore, the adhesive force of one of the first adhesive layer and the second adhesive layer can be evenly applied between the glass plate structure and the mounting portion. Thus, the mounting portion can be evenly bonded and fixed to the glass plate structure.

[0194] (12) The glass vibration plate according to (11), wherein

[0195] The other of the first adhesive layer and the second adhesive layer is disposed in a second region that is point-symmetrical with respect to the center of gravity.

[0196] According to the glass vibration plate of this structure, when the glass plate structure is viewed from above, the other of the first adhesive layer and the second adhesive layer is arranged in the second region which is point-symmetrical with respect to the center of gravity of the mounting portion, so that the adhesive force of the other of the first adhesive layer and the second adhesive layer can be evenly applied between the glass plate structure and the mounting portion. Thus, the mounting portion can be bonded and fixed to the glass plate structure in a more even manner.

[0197] (13) A glass diaphragm with a vibrator, comprising the glass diaphragm according to any one of (1) to (12) and the vibrator.

[0198] According to the glass diaphragm with a vibrator of this structure, by fixing the connection portion to the attachment portion fixed to the glass plate structure, the glass diaphragm can be made into a glass diaphragm with a vibrator having the vibrator.

[0199] In addition, this application is based on the Japanese patent application (Japanese Patent Application No. 2022-082516) filed on May 19, 2022, the contents of which are incorporated herein by reference.

[0200] Description of Reference Numerals

[0201] 11…glass vibration plate; 13…vibrator; 15…glass plate structure; 17…installation portion; 19…connection portion; 20…adhesive layer; 21…first adhesive layer; 23…second adhesive layer; 31a…step difference; 100…glass vibration plate with vibrator; G…center of gravity.

Claims

1. A glass vibration plate, wherein: have: Glass plate structure; A mounting portion fixed to the glass plate structure and for mounting a vibrator for vibrating the glass plate structure; and The adhesive layer is in contact with the glass plate structure and the mounting portion. The adhesive layer includes a first adhesive layer and a second adhesive layer made of different materials. The shear storage elastic modulus of the first adhesive layer at -40°C is 1.0×10 7 Below Pa, The shear peel strength of the second adhesive layer at 80° C. is 0.2 MPa or more.

2. The glass vibration plate according to claim 1, wherein: The first adhesive layer and the second adhesive layer are in contact with both the glass plate structure and the attachment portion.

3. The glass vibration plate according to claim 1, wherein: The first adhesive layer and the second adhesive layer have portions separated from each other.

4. The glass vibration plate according to claim 1, wherein: The mounting portion has a step toward the glass plate constituent body.

5. The glass vibration plate according to claim 1, wherein: At least one of the first adhesive layer and the second adhesive layer has a loss coefficient tan δ of 0.01 or more at -40°C.

6. The glass vibration plate according to claim 1, wherein: The average value of the shear peel strength of the adhesive layer in the range of -40°C to 80°C is 0.2 MPa or more.

7. The glass vibration plate according to claim 1, wherein: The thickness of the first adhesive layer and the thickness of the second adhesive layer are 1 μm to 1.0 mm.

8. The glass vibration plate according to claim 7, wherein: The thickness of the first adhesive layer is substantially the same as that of the second adhesive layer.

9. The glass vibration plate according to claim 1, wherein: The ratio of the surface area S1 of the first adhesive layer to the surface area S2 of the second adhesive layer when the glass plate structure is viewed in a plan view is in the range of 1:0.01 to 1:

100.

10. The glass vibration plate according to claim 9, wherein: The total area of ​​the surface area S1 and the surface area S2 is 100 mm 2 above.

11. The glass vibration plate according to claim 1, wherein: The center of gravity of the mounting portion when the glass plate structure is viewed from above coincides with one of the first adhesive layer and the second adhesive layer. The one adhesive layer is arranged in the first region which is point-symmetrical with respect to the center of gravity.

12. The glass vibration plate according to claim 11, wherein The other of the first adhesive layer and the second adhesive layer is arranged in a second region which is point-symmetrical with respect to the center of gravity.

13. A glass vibration plate with a vibrator, wherein: have: A glass vibration plate as claimed in any one of claims 1 to 12; and The vibrator.

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