glass diaphragm

Abstract

To obtain a glass diaphragm that can suppress the charging of the oscillator. [Solution] The glass diaphragm 10A comprises a glass plate 18, at least one vibrator 20 that vibrates the glass plate 18, and an externally releaseable adhesive layer 30 disposed between the glass plate 18 and the vibrator 20, configured to reduce its adhesive strength by inputting an external force different from the vibration generated by the vibrator 20.

Description

Technical Field

[0001] The present invention relates to a glass diaphragm.

Background Art

[0002] In Patent Document 1, a glass diaphragm in which the diaphragm is made of a glass plate has been proposed. In this glass diaphragm, an electrically peelable adhesive layer is disposed between the mount portion to which the vibrator is fixed and the glass structure.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] <00%00027>In Patent Document 1, it has been proposed that by applying a voltage to the electrically peelable adhesive layer, the adhesive force of the electrically peelable adhesive layer is reduced, and the mount portion and the vibrator are removed from the glass plate structure. However, during the operation, it is necessary to secure a power source for applying the voltage, and a dedicated tool is required. Therefore, there is room for improvement in terms of improving workability.

[0005] In consideration of the above facts, an object of the present invention is to obtain a glass diaphragm from which a vibrator can be easily removed from a glass plate.

Means for Solving the Problems

[0006] The glass diaphragm according to the present invention includes a glass plate, at least one vibrator that imparts vibration to the glass plate, and an external force peelable adhesive layer disposed between the glass plate and the vibrator and configured to reduce the adhesive force by an input of an external force different from the vibration generated by the vibrator.

Effects of the Invention

[0007] In the glass diaphragm according to the present invention, the vibrator can be easily removed from the glass plate. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic front view showing the glass diaphragm according to this embodiment. [Figure 2] This is a front view showing a partially enlarged portion of the glass diaphragm shown in Figure 1. [Figure 3] This is a cross-sectional view of the glass diaphragm cut along line 3-3 in Figure 2. [Figure 4] (A) and (B) are diagrams illustrating the procedure for removing the transducer from the glass plate, and are cross-sectional views corresponding to Figure 3. [Figure 5] This is a cross-sectional view of a glass diaphragm according to a first modified example of this embodiment. [Figure 6] (A) and (B) are diagrams illustrating the procedure for removing the vibrator from the glass plate in the first modified example, and are cross-sectional views corresponding to Figure 3. [Figure 7] This is a cross-sectional view of a glass diaphragm according to a second modified example of this embodiment. [Figure 8] This is a cross-sectional view of a glass diaphragm according to a third modified example of this embodiment. [Figure 9] This is a cross-sectional view of a glass diaphragm according to a fourth modified example of this embodiment. [Figure 10] This is a schematic front view showing a glass diaphragm according to a fifth modified example of this embodiment. [Figure 11] This is a cross-sectional view of the glass diaphragm cut along line 11-11 in Figure 10. [Modes for carrying out the invention]

[0009] A preferred embodiment of the glass diaphragm according to the present invention will be described below with reference to the drawings. While the description below focuses on the application of the glass diaphragm to a vehicle window, the glass diaphragm according to the present invention may be applied to other moving objects such as airplanes, helicopters, ships, and trains, not just vehicles. Furthermore, the glass diaphragm according to the present invention may be applied to the window glass of buildings and other structures.

[0010] Unless otherwise specified in the specification, each element is not limited to one, and multiple elements may exist. In addition, substantially identical elements are denoted by the same reference numeral in the drawings, and redundant explanations in the specification are omitted.

[0011] The glass diaphragm 10A according to this embodiment will be described with reference to Figures 1 to 4. Figure 1 is a schematic front view showing the glass diaphragm 10A according to the first embodiment. For the sake of explanation, in the following description, the vertical direction (the vertical direction on the paper of Figure 1) when viewing the glass diaphragm 10A from the front will be referred to as up and down, and the horizontal direction (the horizontal direction on the paper of Figure 1) will be referred to as left and right. In each figure, the arrow IN indicates the interior side of the vehicle, and the arrow OUT indicates the exterior side of the vehicle.

[0012] The glass diaphragm 10A comprises a support structure 12 having an opening 16, a glass plate 18 whose outer periphery is supported by the opening 16, a vibrator 20 that vibrates the glass plate 18, and an externally release adhesive layer 30 disposed between the vibrator 20 and the glass plate 18. The glass diaphragm 10A vibrates the glass plate 18 due to the vibrations applied by the vibrator 20, and this vibration propagates into the surrounding air, generating sound pressure as a speaker.

[0013] (Support structure) As an example, the support structure 12 is formed by creating an opening 16 in a support body portion 14 that constitutes a plate-shaped frame. In this embodiment, the support structure 12 is the body 100 of the vehicle V.

[0014] (Glass plate) The glass plate 18 constitutes the diaphragm of the glass diaphragm 10A. The glass plate 18 is composed of a single-plate glass made of a single glass plate and has two main surfaces facing each other in the plate thickness direction. Note that the glass plate 18 may be a laminated glass in which two glass plates are adhered by a resin intermediate layer.

[0015] The glass plate 18 is formed of a transparent or translucent inorganic glass. As the inorganic glass, for example, soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass can be used.

[0016] When the glass plate 18 is an inorganic glass and a single-plate glass, the glass plate 18 is preferably a tempered glass. The tempered glass is one in which a compressive stress layer is formed on the surface of the glass that has not been strengthened, and it may be either air-cooled tempered glass or chemically strengthened glass. When the tempered glass is physically strengthened glass (for example, air-cooled tempered glass), the surface of the glass may be strengthened by causing a compressive stress layer to occur on the glass surface due to the temperature difference between the glass surface and the glass interior by an operation other than slow cooling, such as rapidly cooling a uniformly heated glass plate in bending forming from a temperature near the softening point. When the tempered glass is chemically strengthened glass, the surface of the glass may be strengthened by causing a compressive stress to occur on the glass surface by an ion exchange method or the like after bending forming.

[0017] When the glass plate 18 is a laminated glass in which two glass plates are adhered by a resin intermediate layer, both of the two glasses may be non-strengthened glasses, or only one of them may be a tempered glass, or both of them may be tempered glasses. In the case where both are tempered glasses, both may be air-cooled tempered glasses, both may be chemically strengthened glasses, or one may be air-cooled tempered glass and the other may be chemically strengthened glass.

[0018] However, the glass plate 18 may be formed from organic glass, although this is not limited to the above. Examples of organic glass include PMMA (Polymethylmethacrylate) resin, PC (polycarbonate) resin, PS (polystyrene) resin, PET (Polyethyleneterephthalate) resin, and cellulose resin.

[0019] When the glass plate 18 is single-pane glass, the thickness of the glass plate 18 is preferably 0.5 [mm] or more, more preferably 1.0 [mm] or more, and even more preferably 1.5 [mm] or more. This improves the rigidity and strength of the glass plate 18, making it easier for the piston to vibrate. Also, when the glass plate 18 is single-pane glass, from the viewpoint of reducing the weight of the glass diaphragm 10A, the thickness of the glass plate 18 is preferably 10.0 [mm] or less, more preferably 7.0 [mm] or less, and even more preferably 5.0 [mm] or less.

[0020] When the glass plate 18 is made of laminated glass, the thickness of each pair of glass plates constituting the glass plate 18 is preferably 0.5 [mm] or more, more preferably 1.0 [mm] or more, and even more preferably 1.5 [mm] or more. The thicknesses of the pair of glass plates constituting the glass plate 18 may be the same or different, but from the viewpoint of stabilizing sound pressure, the same thickness is preferred. Furthermore, the total thickness of the glass plate 18 is preferably 1.0 [mm] or more, more preferably 2.0 [mm] or more, and even more preferably 3.0 [mm] or more. Also, from the viewpoint of reducing the weight of the glass diaphragm 10A, it is preferably 10.0 [mm] or less, more preferably 8.0 [mm] or less, and even more preferably 6.0 [mm] or less.

[0021] When the glass plate 18 is made of laminated glass, the intermediate layer can be a resin film containing a thermosetting adhesive material such as a transparent polyvinyl butyral (PVB) or ethylene-vinyl acetate copolymer (EVA) resin film, silicone (PDMS), polyurethane, fluorine, polyethylene terephthalate, or polycarbonate. The intermediate layer may also contain materials to enhance sound insulation, increase rigidity, and absorb ultraviolet and infrared rays. The intermediate layer may be liquid or gel-like. Examples of liquid intermediate layers include water, oil, organic solvents, liquid polymers, ionic liquids, and mixtures thereof. More specifically, examples include propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil), modified silicone oil, acrylic acid polymers, liquid polybutadiene, glycerin paste, fluorine-based solvents, fluorine-based resins, acetone, ethanol, xylene, toluene, water, mineral oil, and mixtures thereof. In particular, it is preferable to include at least one selected from the group consisting of propylene glycol, dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, and modified silicone oil, and it is more preferable to have propylene glycol or silicone oil as the main component. Specifically, examples of gel-like intermediate layers include carbon-based, fluorine-based, or silicone-based polymer materials. Specifically, these include ABS, AES, AS, CA, CN, CPE, EEA, EVA, EVOH, IO, PMMA, PMP, PP, PS, PVC, RB, TPA, TPE, TPEE, TPF, TPO, TPS, TPU, TPVC, AAS, ACS, PET, PPE, PA6, PA66, PBN, PBT, PC, POM, PPO, ETFE, FEP, LCP, and PEE. Examples include K, PEI, PES, PFA, PPS, PSV, PTFE, PVDF, silicone, polyurethane, PI, PF, TAC, polyolefins, acrylics and their copolymer resins. Alternatively, composite materials combining the above materials are also examples. The above materials may be used individually or in combination of two or more. The thickness of the intermediate layer may be, for example, 0.1 [μm] to 3.0 [mm], 1.0 [μm] to 2.8 [mm], or 3.0 [μm] to 2.6 [mm].

[0022] A coating film may be formed on the glass plate 18. The coating film may include a Low-E (Low Emissivity) film, an AG (Anti-Glare) film, an AR (Anti-Reflection) film, an AF (Anti-Fingerprint) film, an UV (ultraviolet) cut film, an anti-fogging film, an anti-mold film, and a water-repellent film.

[0023] Furthermore, the glass plate 18 may be colored glass baked with blue, red, green, gray, etc., or it may be privacy glass. Privacy glass is glass with lower transparency than green glass and clear glass, and is also called dark gray glass. Privacy glass can be realized in the glass plate 18 by adjusting the total iron content converted to Fe2O3. The visible light transmittance of privacy glass can be adjusted to, for example, about 40-50% when the plate thickness is 1.8 mm, and about 30-45% when the plate thickness is 2.0 mm. Dimmable glass may also be used. Dimmable glass consists of two panes of glass with a dimmable film that electrically controls the visible light transmittance sandwiched between them. Examples of dimmable films that can be used include TN (Twisted Nematic) liquid crystal films, VA (Vertical Alignment) liquid crystal films, polymer dispersed liquid crystal (PDLC) films, suspended particle device (SPD) films, polymer network liquid crystal (PNLC) films, guest-host liquid crystal films, electrochromic materials, and photochromic materials.

[0024] The glass plate 18 described above is supported at its outer periphery by an opening 16 in a support structure 12 that constitutes the body 100 of the vehicle V. In other words, the glass plate 18 constitutes the window glass of the vehicle V. The glass plate 18 may be applied, for example, to the back glass (rear glass) that constitutes the rear of the vehicle V, the roof glass that constitutes the top of the vehicle V, the windshield that constitutes the front of the vehicle V, and the left and right side windows of the vehicle V.

[0025] (Oscillator) The transducer 20 is connected to a power supply (not shown) and vibrates the glass plate 18 in response to an input electrical signal. In this embodiment, the transducer 20 is, for example, a voice coil motor including a coil section and a magnetic circuit, and the coil section and magnetic circuit are housed in an outer shell (housing) 22 made of an insulator. The material of the insulator is not particularly limited and may be made of resin or ceramic. In this embodiment, as an example, it is made of resin. The transducer 20 is fixed to the main surface of the glass plate 18 on the vehicle interior side via an external force-peelable adhesive layer 30, which will be described later.

[0026] (External force releasable adhesive layer) Figure 2 is a partially enlarged plan view of the glass diaphragm 10A, and Figure 3 is a cross-sectional view of the glass diaphragm 10A. As shown in Figure 3, an externally release adhesive layer 30 is placed between the glass plate 18 and the vibrator 20. The externally release adhesive layer 30 is composed of an adhesive layer that fixes the outer shell 22 of the vibrator 20 to the glass plate 18. This externally release adhesive layer 30 is an adhesive layer configured to reduce its adhesive strength when an external force different from the vibration generated by the vibrator is input. The external force referred to here is, for example, a load applied in a direction different from the vibration direction of the vibrator 20 (the thickness direction of the glass plate 18).

[0027] The externally releaseable adhesive layer 30 of this embodiment is, for example, composed of a stretchable adhesive layer that can be stretched by a tensile load in a direction different from the vibration direction. Any known material can be appropriately used for the stretchable adhesive layer. For example, an adhesive made of synthetic rubber or the like can be used as the material for the stretchable adhesive layer.

[0028] The externally force-peelable adhesive layer 30 stretches when a tensile load is applied as an external force in a direction different from the vibration direction of the vibrator 20, and the adhesive strength decreases due to the reduction in the bonding area with the adherend (glass plate 18 and vibrator 20) that occurs as a result of this stretching.

[0029] The stronger the adhesive force of this externally force-peelable adhesive layer 30 to the adhesive surfaces of the glass plate 18 and the vibrator 20, the more effectively it can prevent the vibrator 20 from falling due to vibrations of the glass diaphragm 10A. In this regard, the tensile shear adhesive strength is 2.0 [N / cm]. 2 It is preferable that the tensile adhesive strength be 0.5 [N / cm²] or higher. 2 It is preferable that it be greater than or equal to ].

[0030] Tensile shear adhesive strength is the strength per unit area at which the joint formed by the adhesive layer breaks due to shear stress, which is a load acting parallel to the adhesive surface and attempting to displace the adherends in opposite directions. Furthermore, tensile adhesive strength is the strength per unit area at which the joint formed by the adhesive layer breaks when a tensile stress is applied perpendicularly to the adhesive surface.

[0031] The thickness of the externally releaseable adhesive layer 30 should be 10 mm or less, preferably 5 mm or less, and more preferably 2 mm or less, as a thinner layer allows for more effective transmission of vibrations from the transducer 20 to the glass plate 18. There is no particular lower limit to the thickness of the externally releaseable adhesive layer 30, but 0.05 mm or more is an example.

[0032] As shown in Figure 2, the externally force-peelable adhesive layer 30 includes an extended portion 30A that extends to a position where it does not overlap with the vibrator 20 when viewed from the thickness direction of the glass plate 18. The extended portion 30A is formed so that at least a portion of the outer edge of the externally force-peelable adhesive layer 30 extends outward beyond the outer edge of the vibrator 20.

[0033] Here, the extension portion 30A is covered by a cover member 40 attached to the transducer 20. The cover member 20 is, for example, an L-shaped plate-like member, and has a first wall portion 41 fixed to the upper surface of the transducer 20, and a second wall portion 42 extending from the outer end of the first wall portion 41 toward the glass plate 18. The cover member 40 can be made of, for example, resin or metal. The extension portion 30A of the external force-peelable adhesive layer 30 is covered from above and from the side by the first wall portion 41 and the second wall portion 42 of the cover member 40.

[0034] The cover member 40 is fixed to the transducer 20 using, for example, a connecting member 50 such as a screw, and is detachable from the transducer 20. When the cover member 40 is removed from the transducer 20, the extended portion 30A of the externally release adhesive layer 30 is exposed from the transducer 20 in a plan view of the glass diaphragm 10A. The method of attaching the cover member 40 to the transducer 20 is not limited to the above. The cover member 40 may also be fixed to the transducer 20 using an adhesive. Furthermore, when the transducer 20 is fixed to the glass plate 18 via a mounting member, the cover member may be configured to be fixed to the mounting member side using connecting members such as screws.

[0035] (Mechanism of action and effect) Next, the operation and effects of the glass diaphragm 10A in this embodiment will be explained with reference to Figures 4(A) and 4(B). Figures (A) and (B) are diagrams illustrating the procedure for removing the vibrator 20 from the glass plate 18, and are cross-sectional views corresponding to Figure 3.

[0036] The glass diaphragm 10A according to this embodiment comprises a glass plate 18 and at least one vibrator 20 that vibrates the glass plate 18. As a result, the glass diaphragm 10A vibrates the glass plate 18 due to the vibrations applied by the vibrator 20, and this vibration propagates into the surrounding air, generating sound pressure as a speaker.

[0037] Here, an externally releaseable adhesive layer 30 is placed between the glass plate 18 and the vibrator 20 as a means of fixing the vibrator 20 to the glass plate 18. This externally releaseable adhesive layer 30 is configured to reduce its adhesive strength when an external force different from the vibration generated by the vibrator 20 is applied. Therefore, it becomes possible to re-detach the adherend (glass plate 18 and vibrator 20) from the adhesive layer by applying a predetermined external force. This makes it possible to easily remove the vibrator 20 from the glass plate 18.

[0038] More specifically, the externally releaseable adhesive layer 30 is composed of a stretchable adhesive layer and is designed to be stretchable by a tensile load of a predetermined magnitude or greater. In this embodiment, the externally releaseable adhesive layer 30 is stretched by applying a tensile load in a direction different from the vibration direction of the vibrator 20 (the thickness direction of the glass plate 18) as the predetermined external force.

[0039] The procedure for removing the transducer 20 from the glass plate 18 is as follows: First, the cover member 40 is removed from the transducer 20 to expose the extended portion 30A of the externally release adhesive layer 30 (Figure 4(A)). Next, the extended portion 30A of the externally release adhesive layer 30 is pulled in a direction substantially parallel to the main surface of the glass plate 18 (see direction of arrow A) to apply a tensile load of a predetermined magnitude or greater.

[0040] The adhesive strength of the externally release adhesive layer 30 gradually decreases as the adhesive area with the adherend decreases due to stretching. The externally release adhesive layer 30 can then be separated by applying further tensile load, which pulls it out from between the glass plate 18 and the vibrator 20 (Figure 4(B)). This releases the adhesive bond between the glass plate 18 and the vibrator 20.

[0041] Thus, with the glass diaphragm 10A, the transducer 20 can be easily removed from the glass plate 18 by applying an external force in a direction different from the vibration direction of the transducer 20.

[0042] Furthermore, in this embodiment, the extension portion 30A is provided in the external force-peelable adhesive layer 30, making it easier to apply tensile load.

[0043] Furthermore, when used as a speaker, the extended portion 30A can be covered by the cover member 40, thereby preventing it from being pulled by unintended contact or other means.

[0044] However, in the above embodiment, it is not essential to provide an extension portion 30A in the externally peelable adhesive layer 30. Also, in the above embodiment, it is not essential to provide a cover member 40 regardless of whether or not there is an extension portion 30A.

[0045] (First variation) The glass diaphragm 10B according to the first modified example will be described below with reference to Figures 5 to 6(B). Note that components substantially identical to those in the previously described embodiment will be given the same numbers and their descriptions will be omitted. Figure 5 is a schematic diagram of the glass diaphragm 10B and is a cross-sectional view corresponding to Figure 3 of the above embodiment.

[0046] In the glass diaphragm 10B, a composite adhesive layer 60 is placed between the glass plate 18 and the vibrator 20. The composite adhesive layer 60 is characterized in that an external force-peelable adhesive layer 30 and a non-external force-peelable adhesive layer 62 are adjacent to each other in the direction of the adhesive surface with respect to the adherend.

[0047] The non-external force-release adhesive layer 62 is composed of an adhesive layer in which the reduction in adhesive strength due to external force input different from vibrations generated by the vibrator is less than that of the external force-release adhesive layer 30. The non-external force-release adhesive layer 62 may be a resin layer composed of at least one resin, such as urethane, phenol, butyl, synthetic rubber, acrylic, epoxy, silicone, epoxy-silicone, and polyvinyl chloride. The non-external force-release adhesive layer 62 may also be a non-stretchable adhesive layer. Here, a non-stretchable adhesive layer means one in which the maximum elongation when the adhesive layer is stretched is 50% or less.

[0048] The non-external-force-peelable adhesive layer 62 is preferable to have a larger bonding area with the adherend in order to ensure that the transducer 20 and the glass plate 18 remain bonded even after the external-force-peelable adhesive layer 30 is removed. Furthermore, the non-external-force-peelable adhesive layer 62 is preferable to have a larger bonding area with the adherend in order to easily remove the transducer 20 from the glass plate 18 after the external-force-peelable adhesive layer 30 is removed. In this embodiment, the bonding area between the non-external-force-peelable adhesive layer 62 and the adherend is set to be smaller than the bonding area between the external-force-peelable adhesive layer 30 and the adherend.

[0049] Furthermore, when removing the vibrator 20 from the glass plate 18 after the external force-release adhesive layer 30 has been removed, the non-external force-release adhesive layer 62 is positioned closer to the outer edge of the adhesive surface with the adherend, making it easier to concentrate stress and thus easier to remove again. For this reason, in this embodiment, the non-external force-release adhesive layer 62 is positioned in a location corresponding to a part of the outer edge of the vibrator 20 when viewed from the thickness direction of the glass plate 18.

[0050] Furthermore, the non-external-force-peelable adhesive layer 62 is preferably provided at a position spaced apart from the extended portion 30A of the external-force-peelable adhesive layer 30, as it utilizes the reaction force of the vibrator 20 when the external-force-peelable adhesive layer 30 is removed as an auxiliary force for removing the vibrator 20 from the glass plate 18. For this reason, in this embodiment, the extended portion 30A and the non-external-force-peelable adhesive layer 62 are arranged on a straight line along the extension direction (arrow A direction) of the extended portion 30A in a plan view.

[0051] As shown in Figure 6(A), when removing the vibrator 20 from the glass plate 18, a tensile load of a predetermined magnitude or greater is applied by pulling the extended portion 30A of the externally peelable adhesive layer 30 in a direction substantially parallel to the main surface of the glass plate 18.

[0052] The adhesive strength of the externally releaseable adhesive layer 30 gradually decreases as the adhesive area with the adherend decreases due to stretching. Then, by applying further tensile load, the externally releaseable adhesive layer 30 is pulled out from between the glass plate 18 and the vibrator 20. In this state, only the non-externally releaseable adhesive layer 62 remains as the composite adhesive layer 60, bonding the glass plate 18 and the vibrator 20 with a small adhesive area. Therefore, by gripping the vibrator 20 and pulling it away from the glass plate 18, the vibrator 20 can be easily removed from the glass plate 18 with little force (Figure 6(B)).

[0053] According to the above configuration, even after removing the externally peelable adhesive layer 30, a partial adhesive layer (non-externally peelable adhesive layer 62) can be left between the glass plate 18 and the vibrator 20. Therefore, the vibrator 20 is less likely to fall in an unintended direction due to the recoil when removing the externally peelable adhesive layer 30, resulting in excellent workability.

[0054] (Second variation) The glass diaphragm 10C according to the second modified example will be described below with reference to Figure 7. Note that components substantially identical to those in the previously described embodiment and modified example will be given the same numbers and their descriptions will be omitted. Figure 7 is a schematic diagram of the glass diaphragm 10C and is a cross-sectional view corresponding to Figure 3 of the above embodiment.

[0055] In the glass diaphragm 10C, a non-externally-peelable adhesive layer 70, an adhesive substrate 72, and an externally-peelable adhesive layer 30 are laminated in this order between the glass plate 18 and the vibrator 20. A key feature is that at least one of the non-externally-peelable adhesive layer 70 and the adhesive substrate 72 suppresses the transmission of ultraviolet light irradiated onto the glass plate to the externally-peelable adhesive layer 30.

[0056] The adhesive substrate 72 is composed of a film-like substrate. The adhesive substrate 72 comprises both a non-externally-peelable adhesive layer 70 to which the glass plate 18 is adhered, and an externally-peelable adhesive layer 30 to which the vibrator 20 is adhered.

[0057] Here, the adhesive substrate 72 remains on the main surface of the glass plate 18 along with the non-external-pressure-removable adhesive layer 70 even after the external-pressure-removable adhesive layer 30 is removed from between the glass plate 18 and the vibrator 20. In other words, the adhesive strength between the non-external-pressure-removable adhesive layer 70 and the adhesive substrate 72 is stronger than the adhesive strength between the external-pressure-removable adhesive layer 30 and the adhesive substrate 72.

[0058] The adhesive substrate 72 can be made of a resin or a metal, and in order to suppress the deterioration of the externally peelable adhesive layer 30 due to ultraviolet light, it is preferable that the material reflects ultraviolet light, and more preferably that the material reflects 50% or more of ultraviolet light with a wavelength of 340 nm to 380 nm.

[0059] The non-externally peelable adhesive layer 70 can be composed of, for example, a resin layer. In order to suppress the degradation of the externally peelable adhesive layer 30 due to ultraviolet light, it is preferable to have an ultraviolet absorber added to the resin layer, and it is more preferable that the material absorbs 50% or more of ultraviolet light with a wavelength of 340 nm to 380 nm. The resin layer may be, as an example, a resin layer composed of at least one resin from the urethane, phenol, butyl, synthetic rubber, acrylic, epoxy, silicone, epoxy silicone, and polyvinyl chloride systems. The resin layer may also be a non-stretchable adhesive layer. Furthermore, examples of UV absorbers include organic additives such as benzotriazole-based and hydroxyphenyltriazine-based materials, as well as inorganic fillers such as titanium dioxide and carbon.

[0060] With the above configuration, the adherend of the externally release adhesive layer 30 can be the adhesive substrate 72, so that the adhesive strength of the externally release adhesive layer 30 can be ensured regardless of the surface condition of the glass plate 18. Furthermore, after the externally release adhesive layer 30 is removed, no adhesive layer remains on the transducer 20 side, making maintenance of the transducer 20 easier.

[0061] Furthermore, at least one of the non-externally-peelable adhesive layer 70 and the adhesive substrate 72 constitutes an ultraviolet light transmission suppressing member. As a result, ultraviolet light irradiated onto the glass plate 18 is suppressed from penetrating to the externally-peelable adhesive layer 30. Consequently, deterioration of the externally-peelable adhesive layer 30 due to ultraviolet light is suppressed, making maintenance of the transducer 20 easier while maintaining the adhesive strength of the externally-peelable adhesive layer 30 over a long period of time.

[0062] (Third variation) The glass diaphragm 10D according to the third modified example will be described below with reference to Figure 8. Note that components substantially identical to those in the previously described embodiment and modified example will be given the same number and their descriptions will be omitted. Figure 8 is a schematic diagram of the glass diaphragm 10D and is a cross-sectional view corresponding to Figure 3 of the above embodiment.

[0063] In the glass diaphragm 10D, an externally release adhesive layer 30, an adhesive substrate 72, and a non-externally release adhesive layer 70 are laminated in this order between the glass plate 18 and the vibrator 20. A distinctive feature is that the glass plate 18 is made of an ultraviolet transmission suppressing material.

[0064] The adhesive substrate 72 comprises both a non-externally-peelable adhesive layer 70 to which the vibrator 20 is adhered, and an externally-peelable adhesive layer 30 to which the glass plate 18 is adhered.

[0065] The adhesive substrate 72 remains on the vibrator 20 side along with the non-external-pressure-removable adhesive layer 70 even after the external-pressure-removable adhesive layer 30 is removed from between the glass plate 18 and the vibrator 20. In other words, the adhesive strength between the non-external-pressure-removable adhesive layer 70 and the adhesive substrate 72 is stronger than the adhesive strength between the external-pressure-removable adhesive layer 30 and the adhesive substrate 72.

[0066] Here, the glass plate 18 is made of an ultraviolet transmission suppressing member. For example, the glass plate 18 can be made into an ultraviolet transmission suppressing member by forming an ultraviolet absorption film or an ultraviolet reflection film on the surface of the glass plate 18. When the glass plate 18 is made into an ultraviolet transmission suppressing member, it is preferable that it reflects or reflects 50% or more of ultraviolet light with a wavelength of 340 [nm] to 380 [nm].

[0067] Furthermore, the glass plate 18 can be made of laminated glass in which an ultraviolet absorption function is imparted by including an ultraviolet absorber such as an oxalic acid anilide ultraviolet absorber, a hydroxyphenyltriazine ultraviolet absorber, or a benzotriazole ultraviolet absorber in the intermediate layer sandwiched between the glass plates, thereby making it an ultraviolet transmission suppressing member. In this case, it is preferable that it absorbs 50% or more of ultraviolet light with wavelengths of 340 nm to 380 nm.

[0068] According to the above configuration, the adherend of the externally release adhesive layer 30 can be the adhesive substrate 72, so that the adhesive strength of the externally release adhesive layer 30 can be ensured regardless of the surface condition of the vibrator 20. Furthermore, after the externally release adhesive layer 30 is removed, no adhesive layer remains on the surface of the glass plate 18, making maintenance of the glass plate 18 easier.

[0069] Furthermore, according to the above configuration, the glass plate 18 constitutes an ultraviolet light transmission suppression member. As a result, the transmission of ultraviolet light irradiated onto the glass plate 18 to the externally release adhesive layer 30 is suppressed. Consequently, the deterioration of the externally release adhesive layer 30 due to ultraviolet light is suppressed, making maintenance of the transducer 20 easier while maintaining the adhesive strength of the externally release adhesive layer 30 over a long period of time.

[0070] (Fourth variation) The glass diaphragm 10E according to the fourth modified example will be described below with reference to Figure 9. Note that components substantially identical to those in the previously described embodiment will be given the same numbers and their descriptions will be omitted. Figure 9 is a schematic diagram of the glass diaphragm 10E and is a cross-sectional view corresponding to Figure 3 of the above embodiment.

[0071] The configuration of the glass diaphragm 10E is basically the same as the glass diaphragm 10A according to the above embodiment. The configuration is identical to that of the previous model. On the other hand, the glass diaphragm 10E is characterized in that an operating piece 80 is connected to the extended portion 30A of the externally force-peelable adhesive layer 30. The operating piece 80 is a component provided for the operator to grip with their fingers when applying a tensile load to the extended portion 30A, and is made of a non-stretchable material. Examples of non-stretchable materials include resin materials and metal materials that do not have stretchability.

[0072] According to the above configuration, since the extension portion 30A of the externally force-peelable adhesive layer 30 is provided with an operating piece 80 made of a non-stretched material, the workability when applying a predetermined external force to the externally force-peelable adhesive layer 30 is excellent.

[0073] Although not shown in the figures, the operating piece 80 may be formed integrally with the cover member 40 in the above embodiment.

[0074] (Fifth variation) The glass diaphragm 10F according to the fifth modified example will be described below with reference to Figures 10 and 11. Note that components substantially identical to those in the previously described embodiments and modified examples will be given the same numbers and their descriptions will be omitted. Figure 9 is a schematic front view of the glass diaphragm 10F and corresponds to Figure 1 of the above embodiment. Figure 11 is a cross-sectional view of the glass diaphragm 10F cut along the line 11-11 in Figure 10.

[0075] The glass diaphragm 10F has a plate-shaped mounting portion 110 fixed to the glass plate 18 via a non-external force-release adhesive layer 90. The transducer 20 is fixed to the mounting portion 110 via an external force-release adhesive layer 30.

[0076] The mounting section 110 is provided as a base for fixing the transducer 20 to the glass plate 18, and is made of a plate-shaped member made of resin or metal.

[0077] The shape of the mounting portion 110 is not particularly limited, but by making it a shape that extends in multiple directions along the main surface of the glass plate 18, multiple transducers 20 can be attached to the mounting portion 110 which is made of a single component. In this embodiment, the mounting portion 110 is made of a substantially L-shaped plate member that extends in two directions along the main surface of the glass plate 18 and constitutes a base for two transducers 20.

[0078] The non-externally-peelable adhesive layer 90 that bonds the mounting portion 110 and the glass plate 18 may, for example, be a resin layer composed of at least one resin from the following categories: urethane, phenol, butyl, synthetic rubber, acrylic, epoxy, silicone, epoxy-silicone, and polyvinyl chloride. The resin layer may also be a non-stretchable adhesive layer.

[0079] With the above configuration, the mounting portion 110 can be used as the adherend for the externally removable adhesive layer 30, thus ensuring the adhesive strength of the externally removable adhesive layer 30 regardless of the surface condition of the glass plate 18. Furthermore, even after the externally removable adhesive layer 30 is removed, the base of the transducer 20 remains on the main surface of the glass plate 18, thus suppressing wear of the glass plate 18 due to maintenance and extending the lifespan of the component.

[0080] The following additional information is disclosed regarding the above embodiments and their respective modifications.

[0081] (Note 1) A glass plate and At least one vibrator that vibrates the glass plate, An externally force-release adhesive layer is placed between the glass plate and the vibrator and configured to reduce its adhesive strength by an external force input different from the vibration generated by the vibrator. Glass diaphragm equipped with a glass diaphragm. (Note 2) The externally force-peelable adhesive layer includes an extended portion that extends to a position that does not overlap with the vibrator when viewed from the thickness direction of the glass plate. The glass diaphragm as described in Appendix 1. (Note 3) The transducer is further provided with a removable cover member, The cover member is arranged to cover at least the extended portion. The glass diaphragm as described in Appendix 2. (Note 4) Between the glass plate and the vibrator, a composite adhesive layer is disposed in which the externally releaseable adhesive layer and the non-externally releaseable adhesive layer are adjacent in the direction of the adhesive surface. A glass diaphragm as described in any of the appendices 1 to 3. (Note 5) Between the glass plate and the vibrator, a non-externally-peelable adhesive layer, an adhesive substrate, and the externally-peelable adhesive layer are laminated in this order. A glass diaphragm as described in any of the appendices 1 to 3. (Note 6) At least one of the non-externally-peelable adhesive layer and the adhesive substrate is composed of an ultraviolet transmission suppressing member that suppresses the transmission of ultraviolet light irradiated onto the glass plate to the externally-peelable adhesive layer. The glass diaphragm described in Appendix 5. (Note 7) Between the glass plate and the vibrator, the externally releaseable adhesive layer, the adhesive substrate, and the non-externally releaseable adhesive layer are laminated in this order. A glass diaphragm as described in any of the appendices 1 to 3. (Note 8) The glass plate is composed of an ultraviolet transmission suppression member that suppresses the transmission of ultraviolet light irradiated onto the glass plate to the externally peelable adhesive layer. The glass diaphragm as described in Appendix 7. (Note 9) It further has a plate-shaped mounting portion fixed on the glass plate, The vibrator is fixed to the mounting portion via the external force-release adhesive layer. A glass diaphragm as described in any of the appendices 1 to 3. (Note 10) The aforementioned external force-peelable adhesive layer is composed of an extensible adhesive layer that can be stretched by a tensile load. The stretchable adhesive layer is stretched by the input of a tensile load in a direction different from the vibration direction of the vibrator as the external force, and the adhesive strength is reduced by the decrease in the adhesive area with the adherend that occurs as a result of this stretching. A glass diaphragm as described in any of the appendices 1 through 9. [Explanation of Symbols]

[0082] 10A, 10B, 10C, 10D, 10E, 10F Glass diaphragm 18 Glass plate 20 transducers 30 External force releasable adhesive layer 30A extension part 62,70,90 Non-external force peelable adhesive layer 72 Adhesive base material 110 Mounting section

Claims

1. A glass plate and At least one vibrator that vibrates the glass plate, An externally releaseable adhesive layer is placed between the glass plate and the vibrator and configured to reduce its adhesive strength by an external force input different from the vibration generated by the vibrator. A glass diaphragm equipped with a glass diaphragm.

2. The externally force-peelable adhesive layer includes an extended portion that extends to a position that does not overlap with the vibrator when viewed from the thickness direction of the glass plate. The glass diaphragm according to claim 1.

3. The transducer is further provided with a removable cover member, The cover member is arranged to cover at least the extended portion. The glass diaphragm according to claim 2.

4. Between the glass plate and the vibrator, a composite adhesive layer is disposed in which the externally releaseable adhesive layer and the non-externally releaseable adhesive layer are adjacent in the direction of the adhesive surface. A glass diaphragm according to any one of claims 1 to 3.

5. Between the glass plate and the vibrator, a non-externally-peelable adhesive layer, an adhesive substrate, and the externally-peelable adhesive layer are laminated in this order. A glass diaphragm according to claim 1 or claim 2.

6. At least one of the non-externally-peelable adhesive layer and the adhesive substrate is composed of an ultraviolet transmission suppressing member that suppresses the transmission of ultraviolet light irradiated onto the glass plate to the externally-peelable adhesive layer. The glass diaphragm according to claim 5.

7. Between the glass plate and the vibrator, the externally releaseable adhesive layer, the adhesive substrate, and the non-externally releaseable adhesive layer are laminated in this order. A glass diaphragm according to claim 1 or claim 2.

8. The glass plate is composed of an ultraviolet transmission suppression member that suppresses the transmission of ultraviolet light irradiated onto the glass plate to the externally peelable adhesive layer. The glass diaphragm according to claim 7.

9. It further has a plate-shaped mounting portion fixed on the glass plate, The vibrator is fixed to the mounting portion via the external force-release adhesive layer. A glass diaphragm according to claim 1 or claim 2.

10. The aforementioned external force-peelable adhesive layer is composed of an extensible adhesive layer that can be stretched by a tensile load. The stretchable adhesive layer is stretched by the input of a tensile load in a direction different from the vibration direction of the vibrator as the external force, and the adhesive strength is reduced by the decrease in the adhesive area with the adherend that occurs as a result of this stretching. A glass diaphragm according to claim 1 or claim 2.

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