Glass diaphragm

Abstract

A glass diaphragm (10) comprises: a glass plate (12) that constitutes a windowpane; an electric heating wire (20) that is routed along the cabin interior side of the glass plate (12); a mounting member (24) that is disposed in a position overlapping the electric heating wire (20) when viewed from the plate thickness direction of the glass plate (12), is adhered to the cabin interior side of the glass plate (12) using an adhesive, and has a vibrator (26) attached thereto; and a protective layer (32) that is interposed between the electric heating wire (20) and the mounting member (24), covers the electric heating wire (20), and separates the adhesive and the electric heating wire (20).

Description

Glass diaphragm

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

[0002] In recent years, a technology has been known in which a glass plate is vibrated to function as a speaker. International Publication No. 2023-224049 discloses a glass diaphragm including a window glass that closes an opening in a vehicle body and a vibrator attached to the surface of the window glass facing the interior of the vehicle. In the technology described in International Publication No. 2023-224049, the vibrator is attached to a mount member. The mount member is fixed to the window glass via an adhesive.

[0003] In order to prevent ice and snow from adhering to window glass and prevent condensation from forming on the glass, a heating wire is sometimes wired to the window glass. When a mount member is attached to such a window glass with a heating wire wired thereto, there is a risk that the heating wire will corrode if the adhesive comes into contact with the heating wire.

[0004] In consideration of the above, the present disclosure aims to provide a glass diaphragm that can suppress corrosion of a heating wire even when a vibrator is placed near the heating wire.

[0005] The glass diaphragm according to the present disclosure comprises a glass plate constituting a window glass, a heating wire wired on the interior side of the glass plate, a mounting member arranged in a position overlapping with the heating wire when viewed in the thickness direction of the glass plate and bonded to the interior side of the glass plate with an adhesive, and to which a vibrator is attached, and a protective layer interposed between the heating wire and the mounting member, covering the heating wire and separating the adhesive from the heating wire.

[0006] According to the present disclosure, the window glass is heated by the heating wire, suppressing the adhesion of ice and snow to the window glass and the formation of condensation. The glass plate is vibrated by the vibrator, causing the glass plate to function as a speaker. The vibrator is attached to a mounting member. The mounting member is positioned so as to overlap the heating wire when viewed in the thickness direction of the glass plate and is bonded to the interior side of the glass plate with an adhesive. A protective layer is interposed between the heating wire and the mounting member. Therefore, the heating wire is protected by the protective layer.

[0007] The glass diaphragm according to the present disclosure has the excellent effect of being able to suppress corrosion of the heating wire even when the vibrator is placed close to the heating wire.

[0008] FIG. 1 is a view of the glass vibration plate according to the first embodiment as seen from outside the vehicle. FIG. 2 is an enlarged cross-sectional view of a main part of the glass vibration plate shown in FIG. 1. FIG. 3 is an enlarged cross-sectional view of a main part of a glass vibration plate according to a modified example of the first embodiment. FIG. 4 is an enlarged cross-sectional view of a main part of a glass vibration plate according to a second embodiment. FIG. 5 is an enlarged cross-sectional view of a main part of a glass vibration plate according to a first modified example of the second embodiment. FIG. 6 is an enlarged cross-sectional view of a main part of a glass vibration plate according to a second modified example of the second embodiment. FIG. 7 is an enlarged cross-sectional view of a main part of a glass vibration plate according to a third modified example of the second embodiment. FIG. 8 is an enlarged cross-sectional view of a main part of a glass vibration plate according to a third embodiment. FIG. 9 is an enlarged cross-sectional view of a main part of a glass vibration plate according to a fourth embodiment. FIG. 10 is an enlarged cross-sectional view of a main part of a glass vibration plate according to a modified example of the fourth embodiment. FIG. 11 is a view of the glass vibration plate according to a fifth embodiment as seen from outside the vehicle.

[0009] Hereinafter, several embodiments of the glass vibration plate according to the present disclosure will be described with reference to Figures 1 to 11. Note that, although the following description will be made on the case where the glass vibration plate is applied to a window glass for a vehicle, the glass vibration plate according to the present disclosure may be applied to a moving body other than a vehicle, such as an airplane, a helicopter, a ship, or a train. The glass vibration plate according to the present disclosure may also be applied to the window glass of a building or other structure.

[0010] First Embodiment A glass diaphragm 10 according to a first embodiment will be described with reference to FIGS. 1 and 2. FIG.

[0011] In this embodiment, a glass vibration plate 10 is applied to a rear window (back window) 12 provided at the rear side of a vehicle. FIG. 1 is a view of the glass vibration plate 10 as viewed from the vehicle exterior in the thickness direction of the rear window 12. For convenience of explanation, in the following description, the up-down direction (the up-down direction on the paper in FIG. 1 ) when viewed from the vehicle exterior in the thickness direction of the rear window 12 will be referred to as "up-down," and the vehicle width direction (the left-right direction on the paper in FIG. 1 ) will be referred to as "left-right." Note that the glass vibration plate is not limited to being applied to a rear window, and may be applied to other glass in a vehicle. For example, the glass vibration plate may be applied to a side window disposed in a side door of a vehicle.

[0012] The glass vibration plate 10 is composed of a rear glass 12 as a glass plate, a defogger 14 provided to prevent ice and snow from adhering to the rear glass 12 and condensation from forming, and a vibration module 16 that vibrates the rear glass 12 to function as a speaker.

[0013] (Rear Windshield 12) The rear windshield 12 constitutes the rear window glass of the vehicle and is fixed to the vehicle body (not shown) in a state where it cannot be raised or lowered. In one example, the rear windshield 12 in this embodiment is formed in a substantially rectangular shape with its longitudinal direction aligned with the vehicle width direction. Note that the rear windshield 12 is often a single-pane glass, but it may also be a laminated glass formed by bonding two glass plates with a resin intermediate layer. The rear windshield 12 is formed from transparent or translucent inorganic glass. Examples of inorganic glass that can be used include soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass.

[0014] When the rear glass 12 is made of inorganic glass and is a single-pane glass, it is preferable that the rear glass 12 be tempered glass. Tempered glass has a compressive stress layer formed on the surface of the glass, and may be either air-cooled tempered glass or chemically tempered glass. When the tempered glass is physically tempered glass (e.g., air-cooled tempered glass), a compressive stress layer may be generated on the glass surface by a temperature difference between the glass surface and the interior of the glass through an operation other than gradual cooling, such as rapidly cooling a uniformly heated glass sheet from a temperature near its softening point during bending. When the tempered glass is chemically tempered glass, compressive stress may be generated on the glass surface by an ion exchange method or the like after bending.

[0015] If the rear glass 12 is a laminated glass consisting of two glass plates bonded together with a resin intermediate layer, both glass plates may be untempered, only one may be tempered, or both may be tempered. If both glass plates are tempered, both may be air-cooled tempered glass, both may be chemically tempered glass, or one may be cold-tempered glass and the other may be chemically tempered glass.

[0016] The rear glass 12 may be made of organic glass, such as PMMA (polymethyl methacrylate) resin, PC (polycarbonate) resin, PS (polystyrene) resin, PET (polyethylene terephthalate) resin, PVC (polyvinyl chloride) resin, or cellulose resin.

[0017] When the rear windshield 12 is a single-plate glass, the thickness of the rear windshield 12 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 rear windshield 12, making it easier for piston vibration to occur. Furthermore, when the rear windshield 12 is a single-plate glass, from the viewpoint of reducing the weight of the glass diaphragm 10, the thickness of the rear windshield 12 is preferably 10.0 mm or less, more preferably 7.0 mm or less, and even more preferably 5.0 mm or less.

[0018] When the rear window 12 is formed of laminated glass in which two glass plates are bonded together with a resin intermediate layer, the thickness of each of the pair of glass plates constituting the rear window 12 is preferably 0.5 mm or more, more preferably 1.0 mm or more, and even more preferably 1.5 mm or more. The pair of glass plates constituting the rear window 12 may have the same or different thicknesses, but the same thickness is preferable from the viewpoint of stabilizing sound pressure. Furthermore, the total thickness of the rear window 12 is preferably 1.0 mm or more, more preferably 2.0 mm or more, and even more preferably 3.0 mm or more. Furthermore, from the viewpoint of reducing the weight of the glass diaphragm 10, the total thickness is preferably 10.0 mm or less, more preferably 8.0 mm or less, and even more preferably 6.0 mm or less.

[0019] When the rear glass 12 is laminated glass, the intermediate layer may be, for example, a transparent polyvinyl butyral (PVB)-based or ethylene-vinyl acetate copolymer (EVA)-based resin film, or a resin film containing a thermosetting adhesive material such as a silicone (PDMS)-based, polyurethane-based, fluorine-based, polyethylene terephthalate-based, or polycarbonate-based material. The intermediate layer may also contain a material that enhances sound insulation, a material that enhances rigidity, or a material that absorbs ultraviolet or infrared rays. The intermediate layer may also be a liquid or gel-like intermediate layer. Specific examples of liquid intermediate layers include water, oil, organic solvents, liquid polymers, ionic liquids, and mixtures thereof. More specifically, examples of the gel-like intermediate layer include propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methylhydrogen silicone oil), modified silicone oil, acrylic acid polymer, liquid polybutadiene, glycerin paste, fluorine-based solvent, fluorine-based resin, acetone, ethanol, xylene, toluene, water, mineral oil, and mixtures thereof. Among these, it is preferable to include at least one selected from the group consisting of propylene glycol, dimethyl silicone oil, methylphenyl silicone oil, methylhydrogen silicone oil, and modified silicone oil, and it is more preferable to use propylene glycol or silicone oil as the main component. Specific examples of the gel-like intermediate layer include carbon-based, fluorine-based, and silicone-based polymer materials. Specific examples 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, PEEK, PEI, PES, PFA, PPS, PSV, PTFE, PVDF, silicone, polyurethane, PI, PF, PVB, TAC, polyolefin, acrylic, and copolymer resins thereof. Also included are composite materials combining the above materials. The above materials may be used alone or in combination of two or more.The intermediate layer may also contain a tackifier or a plasticizer to provide adhesiveness. 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.

[0020] A coating film may be formed on the rear glass 12. Examples of the coating film include a low-E (low emissivity) film, an anti-glare (AG) film, an anti-reflection (AR) film, an anti-fingerprint (AF) film, a UV (ultraviolet) cut film, an anti-fogging film, an anti-fungal film, and a water-repellent film.

[0021] Furthermore, the rear window 12 may be colored glass baked in blue, red, green, gray, or the like, or 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 achieved by adjusting the total iron content, converted to Fe2O3, in the rear window 12. The visible light transmittance of the privacy glass can be adjusted to approximately 40 to 50% when the plate thickness is 1.8 mm, and approximately 30 to 45% when the plate thickness is 2.0 mm, for example. Also, photochromic glass may be used. Light-controlling glass is a glass in which a light-controlling film that electrically changes the visible light transmittance is sandwiched between two panes of glass. Examples of light-controlling films that can be used include 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. In addition to privacy glass, glass that displays images on part or all of the glass is also envisioned. In addition to sandwiching a liquid crystal film, methods for displaying images include sandwiching a projection screen film. Furthermore, a film-like solar cell element may be provided on part or all of the glass to generate electricity using sunlight. To ensure visibility as a vehicle window glass, it is usually more preferable to use a transparent film with excellent transparency. These functions can be imparted not only by sandwiching the film between panes of glass, but also by directly microfabricating, printing, transferring, or attaching the film to the glass surface, as long as the glass speaker function is not lost.

[0022] A light-shielding layer 18 having a predetermined width is provided on the peripheral edge portion of the rear glass 12. The light-shielding layer 18 is formed of a color ceramic layer, such as a black, dark color, or white color, or a color ink layer printed with organic ink or inorganic ink. The light-shielding layer 18 is provided continuously around the entire peripheral edge portion of the rear glass 12. In FIG. 1, the light-shielding layer 18 is indicated by a two-dot chain line. The glass plate may have an area that does not have a light-shielding layer.

[0023] (Defogger 14) The defogger 14 includes a plurality of heating wires 20 that extend along the vehicle width direction and are spaced apart in the vertical direction, and a pair of left and right bus bars 22 that connect the ends of the heating wires 20 together in the vertical direction. The pair of left and right bus bars 22 are made invisible from outside the vehicle by a light-shielding layer 18. The heating wires 20 are formed, for example, by printing and baking a silver paste containing silver powder and glass frit on the interior surface of the rear window 12. The rear window 12 is heated by the plurality of heating wires 20, thereby suppressing the adhesion of ice and snow and the formation of condensation on the rear window 12 and clearing any fogging on the rear window 12. Note that the heating wires are not limited to silver and may be made of other materials.

[0024] (Vibration Module 16) A pair of left and right vibration modules 16 are provided at the center and lower end of the rear glass 12 in the left-right direction. In the glass vibration plate 10 shown in FIG. 1, the pair of left and right vibration modules 16 are each arranged across the second-lowest heating wire 20. The number and arrangement of the vibration modules 16 are not limited to those described above. For example, the vibration modules 16 may be arranged on only one side in the left-right direction. Alternatively, only one vibration module 16 may be arranged. However, in terms of ensuring visibility of the rear glass 12, it is preferable to mount the vibration module 16 near the edge of the rear glass 12. The edge of the vibration module 16 is preferably within 1.0 m, more preferably within 0.5 m, and even more preferably within 0.1 m from the glass edge of the rear glass 12. Thus, the vibration module 16 is preferably provided on the peripheral edge of the rear glass 12.

[0025] Fig. 2 is an enlarged cross-sectional view of a main portion of the glass diaphragm 10. As shown in Fig. 2, the vibration module 16 includes a mount member 24 bonded with an adhesive to the passenger compartment side (interior side) of the rear window 12, and a vibrator 26 attached to the passenger compartment side of the mount member 24. The mount member 24 and the vibrator 26 are formed in a circular shape when viewed in the thickness direction of the rear window 12. As shown in Fig. 1, the mount member 24 is disposed in a position where the central portion in the up-down direction when viewed in the thickness direction of the rear window 12 overlaps with the heating wire 20. Note that the shapes of the mount member and the vibrator are not limited to circular.

[0026] The vibrator 26 is removably fixed to the mount member 24 by, for example, bolts (not shown). Note that the structure for attaching the vibrator to the mount member is not particularly limited. For example, the vibrator may be mechanically fastened to the mount member by nails, clips, rivets, or the like. Alternatively, a structure may be adopted in which a slide groove is formed on one of the vibrator or the mount member, and a protrusion that engages with the slide groove is formed on the other, and the vibrator and the mount member are fastened by sliding. Furthermore, the vibrator may be attached to the mount member via an adhesive interface such as tape, adhesive, felt, foam, rubber, grease, gel, or plastic.

[0027] The vibrator 26 is connected to a power source via a cable (not shown) and is an actuator that vibrates the rear window 12 in response to an input electrical signal. In this embodiment, the vibrator 26 is, for example, a voice coil motor including a coil portion and a magnetic circuit. One of the coil portion and the magnetic circuit is fixed to the rear window 12, and the other is arranged to be movable relative to the rear window 12. When a current flows through the coil portion, the interaction between the coil portion and the magnetic circuit generates vibrations, causing the rear window 12 to vibrate (excite) via the mount member 24. The vibration direction is the thickness direction of the vibrator 26. Note that the vibrator is not limited to a voice coil motor; actuators other than a voice coil motor, such as a piezoelectric type, may be used as long as they are capable of transmitting desired vibrations to the rear window 12.

[0028] The mount member 24 may be formed from a metal such as stainless steel, aluminum, or titanium, or at least a portion of the mount member 24 may be formed from a resin such as plastic. As the plastic, general engineering plastics such as ABS, PVC, PC, PP, PBT, PA66, and PPS may be used, or fiber-reinforced plastics including glass fiber and carbon fiber may be used.

[0029] 2 , a groove 24A is formed in the vertical center of the mount member 24 on the rear window 12 side, facing the passenger compartment, and extends linearly along the vehicle width direction. The heating wire 20 is routed along the groove 24A. The mount member 24 is bonded to the rear window 12 with an adhesive at a position spaced apart from the heating wire 20. That is, the mount member 24 straddles the heating wire 20 at the groove 24A and is bonded to the rear window 12 on both sides of the heating wire 20.

[0030] The mount member 24 is attached to the rear glass 12 via a pressure-sensitive adhesive 28 and a urethane-based adhesive 30. A recess 24B into which the urethane-based adhesive 30 is inserted is formed along the circumferential direction on the surface of the mount member 24 facing the rear glass 12.

[0031] The pressure-sensitive adhesive 28 is a sheet-like adhesive tape, and is adhered to the rear glass 12 side of the mount member 24 at both edges of the recess 24B. The thinner the pressure-sensitive adhesive 28, the more effectively it can transmit vibrations from the vibrator 26 to the rear glass 12. Therefore, the thickness of the pressure-sensitive adhesive 28 should be 3.0 mm or less, preferably 1.0 mm or less, more preferably 0.5 mm or less, and particularly preferably 0.2 mm or less.

[0032] (Protective Resin 32) Here, the heating wire 20 is covered with protective resin 32 as a protective layer at a position where it overlaps with the mount member 24 when viewed from the plate thickness direction of the rear glass 12. The protective resin 32 covers all surfaces of the heating wire 20 at this position except for the adhesive surface with the rear glass 12. The protective resin 32 separates the heating wire 20 from the mount member 24. The protective resin 32 also separates the heating wire 20 from the pressure-sensitive adhesive 28 and the urethane-based adhesive 30.

[0033] The protective resin 32 is composed of a resin having at least a three-dimensional cross-linked structure in a portion thereof. The protective resin 32 is primarily composed of one or more of epoxy, silicone, acrylic, polyester, polyimide, polyamide, polyether, and fluororesin. To reduce water vapor transmission rate, a portion of the resin may contain a resin with a glass transition temperature equal to or higher than room temperature (23°C). The protective resin 32 also contains an antioxidant. Here, the antioxidant includes any substance that inhibits oxidation of the protective resin 32, including a rust inhibitor. The protective resin 32 may also contain an inorganic filler. The resin 32 may have adhesive properties to the heating wire 20 from the viewpoint of reliability in protecting the heating wire.

[0034] (Operation) Next, the operation of this embodiment will be described.

[0035] According to the glass diaphragm 10 of this embodiment, the rear window 12 is heated by the multiple heating wires 20, which prevents ice and snow from adhering to the rear window 12 and prevents condensation from forming on the rear window 12. This clears the fogging on the rear window 12. The vibrator 26 also vibrates the rear window 12, causing the rear window 12 to function as a speaker. The mount member 24 to which the vibrator 26 is attached is positioned so that a portion of the mount member 24 overlaps with the heating wires 20 when viewed from the thickness direction of the rear window 12 and is bonded to the interior side of the rear window 12 with an adhesive. However, a protective resin 32 is interposed between the heating wires 20 and the mount member 24. Therefore, the protective resin 32 protects the heating wires 20 and prevents corrosion of the heating wires 20.

[0036] Furthermore, according to the glass vibration plate 10 of this embodiment, even if the mounting member 24 is positioned in a position where a portion of it overlaps with the heating wire 20 when viewed from the thickness direction of the rear glass 12, the mounting member 24 is adhered at a distance from the heating wire 20, thereby suppressing corrosion of the heating wire 20.

[0037] Furthermore, according to the glass diaphragm 10 of this embodiment, the mount member 24 straddles the heating wire 20 and is bonded to the rear window 12 on both the top and bottom sides of the heating wire 20. Therefore, while the mount member 24 is positioned so as to overlap with the heating wire 20 when viewed in the thickness direction of the rear window 12, the stability of the mount member 24 is improved compared to when the mount member 24 is bonded to the rear window 12 on only one side of the heating wire 20.

[0038] Furthermore, according to the glass diaphragm 10 of this embodiment, the mounting member 24 is firmly adhered to the rear glass 12 by a pressure-sensitive adhesive 28 and a urethane-based adhesive 30. Because the urethane-based adhesive 30 allows water vapor to pass through even after hardening, direct contact with the heating wire 20 can cause corrosion of the heating wire 20 due to ion migration, etc. However, according to the present disclosure, the protective resin 32 is interposed between the urethane-based adhesive 30 and the heating wire 20, preventing the urethane-based adhesive 30 from coming into contact with the heating wire 20 and suppressing corrosion of the heating wire 20.

[0039] Furthermore, according to the glass diaphragm 10 of this embodiment, the antioxidant contained in the protective resin 32 suppresses oxidation of the protective resin 32 .

[0040] Furthermore, according to the glass diaphragm 10 of this embodiment, the heating wire 20 is covered with the protective resin 32, which prevents thermal damage to the vibrator 26 caused by heat generated by the heating wire 20, and also prevents thermal damage to the heating wire 20 caused by heat generated by the vibrator 26.

[0041] [Supplementary explanation of the above embodiment] In the above embodiment, the mounting member 24 straddles the heating wire 20 and is bonded to the rear glass 12 on both sides of the heating wire 20, but this is not limited thereto. For example, the mounting member may be positioned so as to overlap the heating wire when viewed in the thickness direction of the rear glass, but may be bonded to the glass plate on only one side of the heating wire. In this case, an air gap is interposed between the mounting member and the heating wire, thereby suppressing corrosion of the heating wire. In this case, it is preferable that the bonding surface between the mounting member and the glass plate be 2.0 mm or more away from the heating wire.

[0042] In the above embodiment, the mounting member 24 is described as being bonded to the rear glass 12 via a urethane-based adhesive 30, but this is not limiting. For example, the mounting member may be bonded to the glass plate via an acrylic, silicone, epoxy, phenolic, or epoxy-silicone adhesive. Other moisture-curing adhesives may also be used. Furthermore, adhesives that are thermosetting, two-component curing, ultraviolet curing, visible light curing, anaerobic curing, or the like may also be used.

[0043] Furthermore, in the above embodiment, the protective resin 32 is described as containing an antioxidant, but this is not limiting, and the protective layer does not necessarily need to contain an antioxidant.

[0044] In the above embodiment, the pressure-sensitive adhesive 28 and the urethane adhesive 30 are described as being directly adhered to the rear glass 12, but this is not limiting. For example, the structure of the glass diaphragm 40 according to the modified example shown in Fig. 3 may be adopted. In the following modified examples, the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted as appropriate.

[0045] 3, a glass diaphragm 40 according to this modification includes a primer material 42. After the heating wire 20 is wired on the rear window glass 12 and the protective resin 32 is arranged, the primer material 42 is applied to the rear window glass 12 so as to cover the protective layer. Then, a pressure-sensitive adhesive 28 and a urethane-based adhesive 30 are adhered to the passenger compartment side of the primer material 42.

[0046] According to the glass vibration plate 40 of this modified example, the adhesion between the urethane adhesive 30 and the rear glass 12 is improved.

[0047] Furthermore, with the glass diaphragm 40 according to this modified example, the heating wire 20 is protected by the protective resin 32, so the primer material 42 does not come into contact with the heating wire 20. This prevents corrosion of the heating wire 20 due to the organic solvent dissolved in the primer material 42. After covering the heating wire 20 with the protective resin 32, the primer material 42 can be applied to the rear glass 12 in one go, covering the area including the protective resin 32. Therefore, by covering the protective resin 32 with masking tape or the like, applying the primer material 42, and then peeling off the masking tape, the number of steps can be reduced compared to when the primer material is not applied to the area of ​​the protective resin 32.

[0048] Second Embodiment A glass vibration plate 50 according to a second embodiment will be described with reference to Fig. 4. Note that the same components as those in the first embodiment and the modified example of the first embodiment are denoted by the same reference numerals, and descriptions thereof will be omitted as appropriate.

[0049] As shown in Fig. 4, a glass diaphragm 50 according to the second embodiment includes a single-sided tape 52 as a protective tape, instead of the protective resin 32 of the first embodiment. The single-sided tape 52 includes a substrate 54 and an adhesive layer 56 having a three-dimensional cross-linked structure, which is provided on one side of the substrate 54. The single-sided tape 52 is adhered to the rear glass 12 while covering the heating wire 20 with the adhesive layer 56. The adhesive layer 56 is primarily composed of one or more of epoxy, silicone, acrylic and its copolymers, polyester, polyimide, polyamide, polyether, synthetic rubber, natural rubber, polyolefin, polystyrene, and fluororesin. Examples of synthetic rubbers that may be used include polybutadiene rubber (PBR: Polybutadiene Rubber), ethylene propylene diene rubber (EPDM: Ethylene Propylene Diene Monomer Rubber), isoprene rubber (IR: Polyisoprene Rubber), styrene butadiene rubber (SBR: Styrene-butadiene Rubber), butadiene rubber (BR: Butadiene Rubber), ethylene propylene rubber (EPM: Ethylene Propylene Rubber), chloroprene rubber (CR: Chloroprene Rubber), nitrile rubber (NBR: Nitrile Rubber), and hard urethane. The adhesive layer 56 contains an antioxidant. The adhesive layer 56 does not necessarily need to contain an antioxidant. The adhesive layer 56 may also contain an inorganic filler.

[0050] According to the glass diaphragm 50 of this embodiment, as in the modified example of the first embodiment, the heating wire 20 is protected by the single-sided tape 52, so the primer material 42 does not come into contact with the heating wire 20. This prevents corrosion of the heating wire 20 due to the organic solvent dissolved in the primer material 42. Furthermore, after covering the heating wire 20 with the single-sided tape 52, the primer material 42 can be applied to the rear glass 12 in one go in an area including the single-sided tape 52. This reduces the number of work steps.

[0051] Furthermore, with the glass diaphragm 50 according to this embodiment, the heating wire 20 can be easily covered simply by applying the single-sided tape 52 to the heating wire 20. Furthermore, compared to a protective layer that is formed by curing after application, for example, no curing process is required, allowing for quick progress to the next process. This reduces manufacturing time. The adhesive layer 56 that comes into contact with the heating wire 20 has a three-dimensional cross-linked structure. Therefore, unlike the urethane adhesive 30, there is no risk of corroding the heating wire 20, and the heating wire 20 can be reliably protected.

[0052] (First Modification of Second Embodiment) A glass diaphragm 58 according to a first modification of the second embodiment will be described with reference to Fig. 5. Note that the same components as those in the second embodiment will be assigned the same reference numerals, and descriptions thereof will be omitted as appropriate.

[0053] 5, in a glass diaphragm 58 according to this modified example, the single-sided tape 52 is not covered with the primer material 42. In other words, the single-sided tape 52 is covered with masking tape (not shown) or the like, and then the primer material 42 is applied, and then the masking tape is peeled off, so that the primer material 42 is not applied to the portion of the single-sided tape 52.

[0054] (Second Modification of Second Embodiment) A glass vibration plate 60 according to a second modification of the second embodiment will be described with reference to Fig. 6. Note that the same components as those in the second embodiment will be assigned the same reference numerals, and descriptions thereof will be omitted as appropriate.

[0055] 6, a glass diaphragm 60 according to this modification includes a double-sided tape 62 as a protective tape. The double-sided tape 62 includes adhesive layers 56 on both sides of a substrate 54. One side of the double-sided tape 62 covers the heating wire 20. The other side of the double-sided tape 62 is adhered to the bottom surface of the groove 24A of the mounting member 24.

[0056] According to the glass diaphragm 10 of this modified example, the double-sided tape 62 is in the form of a tape, so that it can be easily attached to the rear glass 12 and protect the heating wire 20. Furthermore, because the mount member 24 is adhered to the other surface of the double-sided tape 62 at the bottom surface of the groove portion 24A, the mount member 24 is adhered to the rear glass 12 more stably.

[0057] (Third Modification of Second Embodiment) A glass diaphragm 70 according to a third modification of the second embodiment will be described with reference to Fig. 7. Note that the same components as those in the second embodiment will be assigned the same reference numerals, and descriptions thereof will be omitted as appropriate.

[0058] As shown in Fig. 7, a glass diaphragm 70 according to this modification has a wide groove 72A formed in a mounting member 72. The mounting member 72 does not have a recess 24B (see Fig. 2), and the wide groove 72A is filled with a urethane adhesive 30. Pressure-sensitive adhesive 28 is adhered to both edges of the groove 72A.

[0059] According to the glass diaphragm 70 of this modified example, the shape of the mount member 72 can be simplified, thereby reducing the manufacturing process and manufacturing costs.

[0060] Third Embodiment A glass vibration plate 80 according to a third embodiment will be described with reference to Fig. 8. Note that the same components as those in the first and second embodiments are denoted by the same reference numerals, and descriptions thereof will be omitted as appropriate.

[0061] 8 , a glass diaphragm 80 according to this embodiment includes a disk-shaped mounting member 82. The mounting member 82 is bonded to the rear glass 12 by a resin layer 84 that has a three-dimensional cross-linked structure and adhesive properties. The resin layer 84 covers the heating wire 20 in an area that overlaps with the mounting member 82 when viewed in the thickness direction of the rear glass 12.

[0062] According to the glass vibration plate 80 of this embodiment, the shape of the mounting member 82 is further simplified, and the mounting member 82 can be adhered to the rear glass 12 while protecting the heating wire 20 with the simplest configuration without using a pressure-sensitive adhesive 28 or a urethane-based adhesive 30.

[0063] Fourth Embodiment A glass vibration plate 90 according to a fourth embodiment will be described with reference to Fig. 9. Note that the same components as those in the first to third embodiments will be denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0064] As shown in FIG. 9, in the glass vibration plate 90 according to this embodiment, the mounting member 24 and the heating wire 20 are separated by an air layer 92 serving as a protective layer in the groove 24A of the mounting member 24.

[0065] According to the glass vibration plate 90 of this embodiment, the heating wire 20 can be protected with a simpler configuration than when a separate protective layer such as protective resin 32 (see Figure 2), single-sided tape 52 (see Figure 4), or double-sided tape 62 (see Figure 6) is arranged.

[0066] Furthermore, the air layer 92 thermally insulates the mounting member 24 to which the vibrator 26 is attached from the heating wire 20, thereby suppressing thermal damage caused to each other by the vibrator 26 and the heating wire 20.

[0067] (Modification of Fourth Embodiment) A glass vibration plate 94 according to a modification of the fourth embodiment will be described with reference to Fig. 10. Note that the same components as those in the first to fourth embodiments are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0068] 10 , a glass diaphragm 94 according to this modified example includes a disk-shaped mounting member 82. The mounting member 82 is adhered to the rear glass 12 on both the upper and lower sides of the heating wire 20 by a pressure-sensitive adhesive 28 and a urethane-based adhesive 30. A pair of pressure-sensitive adhesives 28 are disposed above and below, and an air layer 92 is interposed between the pair of pressure-sensitive adhesives 28 and the heating wire 20.

[0069] The urethane adhesive 30 is attached to the surface of the mount member 82 facing the rear glass 12, on the vertical outer side (opposite the air layer) of each of the pair of upper and lower pressure-sensitive adhesives 28. The thicknesses of the pressure-sensitive adhesive 28 and the urethane adhesive 30 are greater than the thickness of the heating wire 20. This separates the mount member 82 from the heating wire 20 by an air layer 92. Note that the urethane adhesive 30 may be attached so as to protrude outside the mount member 82 when viewed in the thickness direction of the rear glass 12. In this case, moisture curing of the urethane adhesive 30 is promoted.

[0070] According to the glass vibration plate 94 of this modified example, the shape of the mount member 82 can be further simplified, as in the third embodiment, while the mount member 82 can be firmly adhered to the rear glass 12 using the pressure-sensitive adhesive 28 and the urethane-based adhesive 30.

[0071] The following additional notes are provided regarding the above-described embodiments.

[0072] Fifth Embodiment A glass vibration plate 100 according to a fifth embodiment will be described with reference to Fig. 11. Note that the same components as those in the first to fourth embodiments will be denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0073] 11, the glass vibration plate 100 includes a mount member 102 that is rectangular when viewed in the thickness direction of the rear glass 12. Three vibrators 26 are attached to the mount member 102.

[0074] The longitudinal direction of the mount member 102 is aligned with the vehicle width direction. A groove 102A recessed toward the passenger compartment is formed in the vertical center of the mount member 102 on the rear window 12 side. The groove 102A extends linearly along the vehicle width direction. The heating wire 20 is routed along the groove 102A. The mount member 102 straddles the heating wire 20 at the groove 102A and is bonded to the rear window 12 on both vertical sides of the heating wire 20.

[0075] According to the glass diaphragm 100 of this embodiment, three vibrators 26 are attached to one mount member 102. Therefore, compared to the case where an individual mount member is provided for each vibrator 26, the number of work steps can be reduced.

[0076] The following additional notes are provided regarding the above-described embodiments.

[0077] (Supplementary Note 1) A glass diaphragm comprising: a glass plate constituting a windowpane; a heating wire wired on the interior side of the glass plate; a mounting member arranged in a position overlapping the heating wire when viewed from the thickness direction of the glass plate and bonded to the interior side of the glass plate with an adhesive, to which a vibrator is attached; and a protective layer interposed between the heating wire and the mounting member, covering the heating wire and separating the adhesive from the heating wire. (Supplementary Note 2) The glass diaphragm according to Supplementary Note 1, wherein the mounting member is bonded to the glass plate at a position spaced apart from the heating wire. (Supplementary Note 3) The glass diaphragm according to Supplementary Note 1 or Supplementary Note 2, wherein the mounting member is arranged across the heating wire and is bonded to the glass plate on both sides of the heating wire. (Appendix 4) The glass diaphragm according to any one of Appendices 1 to 3, wherein the adhesive is a urethane adhesive, the mounting member is bonded to the glass plate via the urethane adhesive, and the protective layer is interposed between the urethane adhesive and the heating wire. (Appendix 5) The glass diaphragm according to Appendices 4, wherein a primer is applied to the glass plate, and the urethane adhesive is applied to the interior side of the primer. (Appendix 6) The glass diaphragm according to Appendices 5, wherein the primer is applied to the glass plate so as to cover the protective layer. (Appendix 7) The glass diaphragm according to any one of Appendices 1 to 6, wherein the protective layer is a protective tape that covers the heating wire and is attached to the glass plate, and includes a substrate and an adhesive layer that is provided on the substrate and has a three-dimensional cross-linked structure. (Appendix 8) The glass diaphragm according to Appendix 7, wherein the protective tape is a double-sided tape having the adhesive layer on both sides of the base material, one side covering the heating wire and the other side being adhered to the mounting member. (Appendix 9) The glass diaphragm according to Appendix 1, wherein the protective layer is made of a resin having a three-dimensional cross-linked structure and adhesive properties, and the mounting member is adhered to the glass plate by the protective layer. (Appendix 10) The glass diaphragm according to any one of Appendices 1 to 9, wherein the protective layer contains an antioxidant.(Appendix 11) The glass diaphragm according to any one of Appendices 1 to 5, wherein the protective layer is an air layer. (Appendix 12) The glass diaphragm according to any one of Appendices 1 to 11, wherein the adhesive is a pressure-sensitive adhesive and a urethane-based adhesive. (Appendix 13) The glass diaphragm according to Appendices 12, wherein a recess into which the urethane-based adhesive enters is formed along the circumferential direction on the surface of the mounting member facing the glass plate, and the pressure-sensitive adhesive is adhered to the glass plate side of the mounting member at both edge portions of the recess.

[0078] The disclosure of Japanese Patent Application No. 2024-087485, filed on May 29, 2024, is incorporated herein by reference in its entirety. All documents, patent applications, and technical standards described herein are incorporated herein by reference to the same extent as if each individual document, patent application, and technical standard was specifically and individually indicated to be incorporated by reference.

[0079] 10, 40, 50, 58, 60, 70, 80, 90, 94, 100 Glass vibration plate 12 Rear glass (glass plate) 20 Heating wire 24, 72, 82, 102 Mounting member 26 Vibrator 30 Urethane adhesive 32 Protective resin (protective layer) 42 Primer material 52 Single-sided tape (protective tape, protective layer) 54 Base material 56 Adhesive layer 62 Double-sided tape (protective tape, protective layer) 84 Resin layer (protective layer) 92 Air layer (protective layer)

Claims

1. A glass diaphragm comprising: a glass plate constituting a windowpane; a heating wire wired on the interior side of said glass plate; a mounting member arranged in a position overlapping with said heating wire when viewed from the thickness direction of said glass plate and bonded to the interior side of said glass plate with an adhesive, to which a vibrator is attached; and a protective layer interposed between said heating wire and said mounting member, covering said heating wire and separating said adhesive from said heating wire.

2. The glass diaphragm according to claim 1, wherein the mounting member is bonded to the glass plate at a position spaced apart from the heating wire.

3. The glass diaphragm according to claim 1, wherein the mounting member is disposed across the heating wire and is bonded to the glass plate on both sides of the heating wire.

4. A glass diaphragm according to claim 1, wherein the adhesive is a urethane adhesive, the mounting member is adhered to the glass plate via the urethane adhesive, and the protective layer is interposed between the urethane adhesive and the heating wire.

5. The glass diaphragm according to claim 4, wherein a primer material is applied to the glass plate, and the urethane adhesive is applied to the interior side of the primer material.

6. The glass diaphragm according to claim 5, wherein the primer material is applied to the glass plate so as to cover the protective layer.

7. A glass diaphragm according to any one of claims 1 to 6, wherein the protective layer is a protective tape that covers the heating wire and is attached to the glass plate, and is configured to include a base material and an adhesive layer that is provided on the base material and has a three-dimensional cross-linked structure.

8. The glass diaphragm according to claim 7, wherein the protective tape is a double-sided tape having the adhesive layer on both sides of the base material, one side covering the heating wire and the other side being adhered to the mounting member.

9. The glass diaphragm according to claim 1, wherein the protective layer is made of a resin having a three-dimensional cross-linked structure and adhesive properties, and the mounting member is adhered to the glass plate by the protective layer.

10. The glass diaphragm according to claim 1, wherein the protective layer contains an antioxidant.

11. The glass diaphragm according to any one of claims 1 to 5, wherein the protective layer is an air layer.

12. The glass diaphragm according to claim 1, wherein the adhesive is a pressure-sensitive adhesive and a urethane-based adhesive.

13. A glass diaphragm as described in claim 12, wherein a recess into which the urethane adhesive is inserted is formed along the circumferential direction on the surface of the mounting member facing the glass plate, and the pressure-sensitive adhesive is adhered to the glass plate side of the mounting member at both edges of the recess.

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