Glass speaker

Abstract

To provide a glass speaker capable of suppressing charging of a vibrator.SOLUTION: A glass speaker 10A is a glass speaker provided with a glass plate 18 and at least one vibrator 20 giving vibration to the glass plate 18, and the vibrator 20 has an outer shell 22 constituted of an insulating body and is fixed to the glass plate 18 via a conductive portion 30 arranged between the outer shell 22 and the glass plate 18.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a glass speaker. [Background technology]

[0002] Patent Documents 1 and 2 propose glass speakers whose diaphragms are made of glass plates. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2023 / 085380 [Patent Document 2] International Publication No. 2023 / 224049 Summary of the Invention [Problem to be solved by the invention]

[0004] The vibrator of a glass speaker generally has an outer shell (housing) made of an insulator, which ensures insulation from the outside. However, such an outer shell of the vibrator may become charged due to friction with surrounding components caused by vibration. In such a situation, if the voltage difference generated at the contact point between the insulator that forms the outer shell and the surrounding components exceeds the dielectric breakdown voltage of the insulator, there is a risk of abnormal operation due to a short circuit or the like in the vibrator circuit.

[0005] In consideration of the above, an object of the present invention is to provide a glass speaker that can suppress charging of the vibrator. [Means for solving the problem]

[0006] The glass speaker of the present invention is a glass speaker comprising a glass plate and at least one vibrator that imparts vibrations to the glass plate, wherein the vibrator has an outer shell made of an insulator and is fixed to the glass plate via a conductive part that is arranged between the outer shell and the glass plate. [Effects of the Invention]

[0007] In the glass speaker according to the present invention, the charge buildup on the vibrator can be suppressed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view schematically showing a glass-type speaker according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the glass speaker taken along line 2-2 in FIG. [Figure 3] FIG. 10 is a schematic diagram for explaining the movement of charges generated around a vibrator. [Figure 4] FIG. 10 is a cross-sectional view corresponding to FIG. 2, schematically showing a glass-type speaker according to a second embodiment. [Figure 5] FIG. 10 is a cross-sectional view corresponding to FIG. 2, schematically showing a glass-type speaker according to a third embodiment. [Figure 6] FIG. 10 is a cross-sectional view corresponding to FIG. 2, schematically showing a glass-type speaker according to a fourth embodiment. [Figure 7] FIG. 10 is a cross-sectional view corresponding to FIG. 2, schematically showing a glass-type speaker according to a fifth embodiment. [Figure 8] FIG. 10 is a cross-sectional view corresponding to FIG. 2, schematically showing a glass-type speaker according to a sixth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a preferred embodiment of the glass speaker according to the present invention will be described with reference to the drawings. While the following description will be made on the case where the glass speaker is applied to the window glass of a vehicle, the glass speaker according to the present invention may also be applied to other moving objects such as airplanes, helicopters, ships, and trains, in addition to vehicles. The glass speaker according to the present invention may also be applied to the window glass of a building or other structure.

[0010] Unless otherwise specified in the specification, each element is not limited to one and may be present in plural. Furthermore, in the drawings, substantially identical elements are denoted by the same reference numerals, and redundant explanations in the specification will be omitted.

[0011] First Embodiment A glass speaker 10A according to the first embodiment will be described with reference to Figures 1 to 3. Figure 1 is a front view showing the glass speaker 10A according to the first embodiment. For ease of explanation, in the following description, the up-down direction (up-down direction on the paper surface of Figure 1) when viewing the glass speaker 10A from the front will be referred to as up-down, and the left-right direction (left-right direction on the paper surface of Figure 1) will be referred to as left-right.

[0012] The glass speaker 10A is configured to include 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 imparts vibrations to the glass plate 18, and a conductive part 30 that is arranged between the vibrator 20 and the glass plate 18. The glass speaker 10A vibrates the glass plate 18 by the vibrations imparted by the vibrator 20, and generates sound pressure as a speaker when these vibrations propagate into the surrounding air.

[0013] (Support structure) The support structure 12 is, for example, formed by a support main body 14 constituting a plate-shaped frame body and having an opening 16 formed in the support main body 14. In this embodiment, the support structure 12 is a body 100 of a vehicle V.

[0014] (glass plate) The glass plate 18 constitutes the diaphragm of the glass speaker 10A. The glass plate 18 is made of a single glass plate and has two main surfaces that face each other in the thickness direction. The glass plate 18 may also be laminated glass in which two glass plates are bonded together with a resin intermediate layer.

[0015] The glass plate 18 is made of transparent or translucent inorganic glass, such as soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass.

[0016] When the glass plate 18 is inorganic glass and is a single-pane glass, it is preferable that the glass plate 18 be tempered glass. Tempered glass is glass that has a compressive stress layer formed on the surface of untempered glass, and may be either air-tempered or chemically tempered glass. When the tempered glass is physically tempered glass (e.g., air-tempered glass), the glass surface may be tempered by a temperature difference between the glass surface and the interior of the glass, such as by rapidly cooling a uniformly heated glass plate from a temperature near its softening point during bending, rather than by gradual cooling. When the tempered glass is chemically tempered glass, the glass surface may be tempered by generating compressive stress on the glass surface using an ion exchange method or the like after bending.

[0017] When glass plate 18 is a laminated glass in which two glass plates are bonded with a resin interlayer, both glass plates may be untempered glass, only one may be tempered glass, or both may be tempered glass. When both glass plates are tempered glass, both may be air-cooled tempered glass, both may be chemically tempered glass, or one may be cold-tempered glass and the other chemically tempered glass.

[0018] However, without being limited to this, the glass plate 18 may be formed of organic glass. 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 a single-plate 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 piston vibration to occur. Furthermore, when the glass plate 18 is a single-plate glass, from the viewpoint of reducing the weight of the glass-mounted speaker 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 of the 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 are preferably the same in terms of stabilizing sound pressure. Furthermore, the total thickness of the glass plates 18 is preferably 1.0 mm or more, more preferably 2.0 mm or more, and even more preferably 3.0 mm or more. Furthermore, in terms of reducing the weight of the glass speaker 10A, 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.

[0021] Examples of the intermediate layer when the glass plate 18 is used as laminated glass include transparent polyvinyl butyral (PVB)-based or ethylene-vinyl acetate copolymer (EVA)-based resin films, and resin films containing thermosetting adhesive materials such as silicone (PDMS), polyurethane, fluorine-based, polyethylene terephthalate, and polycarbonate. Materials that enhance sound insulation, rigidity, and ultraviolet and infrared absorption may also be added to the intermediate layer. The intermediate layer may 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 specific examples include propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methylhydrogen silicone oil), modified silicone oil, acrylic acid-based polymers, liquid polybutadiene, glycerin paste, fluorine-based solvents, fluorine-based resins, 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, methyl hydrogen 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, and PEE. Examples of the intermediate layer include K, PEI, PES, PFA, PPS, PSV, PTFE, PVDF, silicone, polyurethane, PI, PF, TAC, polyolefin, acrylic, and copolymer resins thereof. Alternatively, a composite material combining the above materials may be used. The above materials may be used alone 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. 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, an ultraviolet (UV) cut film, an anti-fogging film, an anti-fungal film, and a water-repellent film.

[0023] Furthermore, the glass plate 18 may be colored glass baked in blue, red, green, gray, or the like, 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 achieved by adjusting the total iron content, converted to Fe2O3, in the rear glass 12. The visible light transmittance of privacy glass can be adjusted to, for example, 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. Light-control glass may also be used. Light-control glass is formed by sandwiching a light-control film between two sheets of glass, which electrically changes the visible light transmittance. Examples of light-control films that can be used include a polymer-dispersed liquid crystal (PDLC) film, a suspended particle device (SPD) film, a polymer network liquid crystal (PNLC) film, a guest-host liquid crystal film, an electrochromic material, and a photochromic material.

[0024] The glass plate 18 has its outer periphery supported by an opening 16 of a support structure 12 that constitutes the body 100 of the vehicle V. That is, the glass plate 18 constitutes a window glass of the vehicle V. In the present embodiment, the glass plate 18 is applied to a back glass (rear window) that constitutes the rear surface of the vehicle V, as an example.

[0025] More specifically, of the two main surfaces of the glass plate 18, an adhesive layer 17 (see FIG. 2) is provided on the main surface facing the interior of the vehicle between the outer periphery of the main surface and the edge of the opening 16. The adhesive layer 17 may be disposed all around the outer periphery of the glass plate 18, or may be disposed only on a portion of the outer periphery. The adhesive layer 17 may be a resin layer containing at least one of urethane-based, phenol-based, butyl-based, synthetic rubber-based, acrylic-based, epoxy-based, silicone-based, epoxysilicone-based, and polyvinyl chloride-based resins.

[0026] A sealant may be provided between the outer periphery of the main surface of the glass plate 18 facing the interior of the vehicle and the opening 16 of the support structure 12. This sealant may be disposed around the entire outer periphery of the glass plate 18, or may be disposed only on a portion of the outer periphery.

[0027] In addition, a conductive wire 26 is disposed on the main surface of the glass plate 18 facing the interior of the vehicle. The conductive wire 26 is electrically grounded to the body 100 of the vehicle V, thereby being short-circuited to the body 100 of the vehicle V. Specifically, the conductive wire 26 may be electrically connected to the opening 16 of the support structure 12.

[0028] The conductive wire 26 has a lower electrical resistance than the conductive adhesive layer 34 described later. 5 It is more preferable to set it to Ω or less.

[0029] When the glass sheet 18 is applied to the rear windshield of a vehicle V, as in this embodiment, the conductive wire 26 can be configured as a negative bus bar of a heating wire (heater wire) of a defogger for clearing (defogging) the glass sheet 18. The defogger includes two bus bars (not shown) extending vertically at an interval in the width direction (left-right direction) of the glass sheet 18, and a plurality of heating wires connecting the two bus bars in the width direction of the glass sheet 18. The defogger generates heat by applying a DC voltage between the positive bus bar and the negative bus bar, causing current to flow through the heating wires. Typically, the negative bus bar is at earth potential (ground). The conductive wire 26 does not have to be the negative bus bar. The conductive wire 26 may be electrically connected to the negative bus bar. A defogger including bus bars is formed by printing and firing a paste containing a conductive metal on the main surface of the rear windshield. The paste containing a conductive metal is, for example, a silver paste containing silver powder and glass frit. Note that the term "electrically connected" means that the conductive wire 26 may be electrically connected to the negative bus bar or the opening 16, or may be electrically connected via a conductive member, or may be electromagnetically (capacitively) coupled to the negative bus bar or the opening 16.

[0030] Furthermore, when the glass plate 18 is used as a rear window, a light-shielding layer that blocks visible light may be provided on at least a portion of the outer periphery of the glass plate 18. The light-shielding layer is formed from a material mainly composed of ceramics, and is disposed on the main surface of the glass plate 18 facing the interior of the vehicle. The vibrator 20, which will be described later, is prevented from being visible from outside the vehicle V, for example, by being attached at a position where this light-shielding layer is provided. This ensures the design of the vehicle V. The color of the opaque colored ceramic layer that constitutes the light-shielding layer can be set as desired, and is preferably a dark color such as black, brown, gray, or dark blue, or white, with black being more preferred.

[0031] The glass plate 18 may be applied to a roof glass that forms the upper surface of the vehicle V, a windshield that forms the front surface of the vehicle V, or window glass on the left and right sides of the vehicle V.

[0032] (vibrator) The vibrator 20 is connected to a power source (not shown) and vibrates the glass plate 18 in response to an input electrical signal. As an example, the vibrator 20 of this embodiment is a voice coil motor including a coil portion and a magnetic circuit, and the coil portion and the magnetic circuit are housed in an outer shell (housing) 22 made of an insulator. Here, the electrical resistance of the insulator that makes up the outer shell 22 is 10 12 [Ω], and 10 13 It is more preferable that the dielectric breakdown voltage of the insulator is set to 10,000 [V / mm] or more, and more preferably 20,000 [V / mm] or more. The material of the insulator is not particularly limited, and may be made of resin or ceramic. In this embodiment, as an example, the insulator is made of resin.

[0033] In the vibrator 20, one of the coil section and the magnetic circuit is fixed to the glass plate 18 via the outer shell 22 and the mount member 32, and the other is arranged so as to be movable relative to the glass plate 18. When a current flows through the coil section, the interaction between the coil section and the magnetic circuit generates vibrations, causing the glass plate 18 to vibrate. Note that the vibrator 20 is not limited to a voice coil motor, and actuators other than voice coil motors, such as a piezoelectric type, can also be used as long as they are actuators that can transmit desired vibrations to the glass plate 18.

[0034] (Conductive part) The conductive portion 30 is disposed between the outer shell 22 of the vibrator 20 and the glass plate 18, and is composed of a member that fixes the outer shell 22 to the glass plate 18. The electrical resistance value of the member that constitutes the conductive portion 30 is set lower than the electrical resistance value of the insulator that constitutes the outer shell 22. As a result, charges such as static electricity generated in the outer shell 22 of the vibrator 20 are released to the surface (main surface) of the glass plate 18 via the conductive portion 30, thereby suppressing charging of the outer shell 22.

[0035] 2 is a cross-sectional view of the glass speaker 10A. As shown in Fig. 2, the conductive part 30 includes a mount member 32 to which the vibrator 20 is attached, and a conductive adhesive layer 34 that bonds at least a portion of the mount member 32 to the glass plate 18.

[0036] (mounting material) The mount member 32 is formed in a flat cylindrical shape. The mount member 32 has a pair of side surfaces facing each other in the thickness direction (axial direction), namely, a first side surface 32A to which the vibrator 20 is attached and a second side surface 32B fixed to the glass plate 18 via a conductive adhesive layer 34.

[0037] The mounting member 32 may be formed from a metal such as stainless steel, aluminum, or titanium, or at least a part of or the entire mounting member 32 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.

[0038] The thinner the thickness of the mounting member 32, the lower the height, and it is preferably 50 mm or less, more preferably 30 mm or less, even more preferably 20 mm or less, and particularly preferably 10 mm or less. Although the mounting member 32 is formed in a flat cylindrical shape, it may be formed in a shape other than a circle in a plan view, such as a rectangle or a polygon.

[0039] Furthermore, the larger the size of the mounting member 32, the more firmly the vibrator 20 can be attached, and a diameter of 5 mm or more is preferred, 10 mm or more is more preferred, 15 mm or more is even more preferred, and 20 mm or more is particularly preferred.

[0040] Furthermore, the smaller the mounting member 32, the more preferable it is in terms of preventing a decline in design, and a diameter of 500 mm or less is preferable, 300 mm or less is more preferable, 200 mm or less is even more preferable, and 100 mm or less is particularly preferable.

[0041] Furthermore, the mount member 32 may be provided with an electrical connection mechanism such as a terminal or connector for connecting the wiring of the vibrator 20 to electricity.

[0042] As one example, the vibrator 20 is attached to the mount member 32 by threading a male screw portion provided on the outer shell 22 of the vibrator 20 into a screw hole (not shown) formed in a first side surface 32A of the mount member 32. In this method, the mount member 32 and the vibrator 20 are in surface contact with each other with the male screw portion threaded into the screw hole. Note that when a portion of the mount member 32 is formed from a resin such as plastic, at least the periphery of the screw hole in the mount member 32 may be formed from a hard metal such as stainless steel by inserting a helical insert or the like, and the rest of the mount member 32 may be formed from a soft metal such as aluminum or a resin such as plastic.

[0043] The structure for attaching the vibrator 20 to the mount member 32 is not particularly limited, and a mechanical fastening structure using bolts, nails, clips, rivets, or the like may be used. Alternatively, a structure may be used in which a slide groove is formed on one of the mount member 32 and the vibrator 20, and a protrusion that engages with the slide groove is formed on the other, and the vibrator 20 is fastened by sliding. Furthermore, the vibrator 20 may be attached to the mount member 32 via an adhesive interface using tape, adhesive, felt, foam, rubber, grease, gel, plastic, or the like. The vibrator 20 may also be partially bonded to glass using an adhesive or the like without using a mount.

[0044] The mount member 32 is formed of a material having a lower electrical resistance than the insulator constituting the outer shell 22. The smaller the electrical resistance of the mount member 32, the better it functions as a charge path for static electricity generated in the outer shell 22. 9It is particularly preferable that the resistance be set to Ω or less. If the mount member 32 has a high electrical resistance, an electrical conduction path may be ensured without going through the mount.

[0045] Furthermore, the electrical resistance value of the mount member 32 is preferably set lower than that of the conductive adhesive layer 34 described below in order to prevent charging of the mount member 32 at the contact portion with the outer shell 22 of the vibrator 20 .

[0046] (Conductive adhesive layer) The second side surface 32B of the mounting member 32 is fixed to the glass plate 18 via a conductive adhesive layer 34. The conductive adhesive layer 34 is made of an adhesive made by mixing conductive particles such as silver paste with a resin material such as an acrylic, silicone, urethane, epoxy, phenol, or epoxy silicone. The volume resistivity of the adhesive is 10 9 The adhesive strength is preferably 5 [N / cm] or more.

[0047] The thinner the conductive adhesive layer 34, the more effectively it can transmit vibrations from the vibrator 20 to the glass plate 18, so it is sufficient if the thickness is 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.

[0048] The conductive adhesive layer 34 is set to have a lower electrical resistance than the insulator constituting the outer shell 22, and has an electrical resistance of 10 9 It is preferable that the resistance be [Ω] or less.

[0049] In this embodiment, the conductive adhesive layer 34 is disposed so as not to overlap the conductive lines 26 formed on the main surface of the glass plate 18 .

[0050] (Action and effect) Next, the operation and effect of the glass speaker 10A of this embodiment will be described with reference to Fig. 3. Fig. 3 is a schematic diagram for explaining the movement of electric charges generated around the vibrator 20.

[0051] 3, the glass speaker 10A according to this embodiment includes a glass plate 18 and at least one vibrator 20 that applies vibrations to the glass plate 18. As a result, the glass speaker 10A vibrates the glass plate 18 due to the vibrations applied by the vibrator 20, and this vibration propagates into the surrounding air, thereby generating sound pressure as a speaker.

[0052] The vibrator 20 is provided with an outer shell 22 made of an insulator, thereby ensuring insulation from the outside. However, if friction occurs between the vibrator 20 and surrounding components due to vibration during operation, the outer shell 22 made of an insulator may become electrically charged. According to this embodiment, the vibrator 20 comes into contact with the first side surface 32A of the mount member 32, and therefore static electricity may be generated on the surface of the contact area due to friction with the first side surface 32A.

[0053] When the vibrator 20 is charged with static electricity, a potential difference occurs between the vibrator 20 and the first side surface 32A of the mount member 32. This causes a bias in the charge inside the mount member 32, which causes a potential difference at the contact area, which is the adhesive interface between the mount member 32 and the adhesive layer (conductive adhesive layer 34), and further causes a potential difference at the contact area, which is the adhesive interface between the adhesive layer (conductive adhesive layer) and the glass plate 18.

[0054] In this state, if the voltage difference generated at the contact point between the outer shell 22 of the vibrator 20 and the mounting member 32 exceeds the breakdown voltage of the insulator that makes up the outer shell 22, there is a risk of abnormal operation due to a short circuit in the vibrator 20.

[0055] Here, the vibrator 20 according to this embodiment is fixed to the glass plate 18 via a conductive part 30 disposed between the outer shell 22 and the glass plate 18. This conductive part 30 is composed of a mount member 32 and a conductive adhesive layer 34, and is set to have a lower electrical resistance value than the insulator that constitutes the outer shell 22. As a result, static charge 36 generated at the contact point between the vibrator 20 and the mount member 32 moves to the surface of the glass plate 18 via the conductive part 30. This prevents the vibrator 20 from becoming charged.

[0056] Furthermore, in this embodiment, the electrical resistance value of the mount member 32 is set lower than the electrical resistance value of the conductive adhesive layer 34, so the mount member 32 is less likely to become charged than the conductive adhesive layer 34. This suppresses charging on the mount member 32 side at the contact point with the outer shell 22 of the vibrator 20, improving the anti-static properties of the vibrator 20.

[0057] The glass that constitutes the glass plate 18 is known as an insulator. However, the surface resistivity of the glass plate 18 is 10, which is less likely to be charged due to the adhesion of water molecules 38 in the air. 9 [Ω / □]~10 10 It is known that the resistance of the glass sheet 18 decreases to about [Ω / □]. Therefore, some of the electric charges 36 that have moved to the surface of the glass sheet 18 via the conductive portion 30 bind with water molecules 38 attached to the surface of the glass sheet 18, thereby suppressing charging. In addition, some of the electric charges 36 move between the water molecules 38 attached to the surface of the glass sheet 18 and are released to the body 100 of the vehicle V, which serves as the support structure 12.

[0058] Furthermore, in this embodiment, a conductive wire 26 electrically grounded to the support structure 12 is formed on the main surface of the glass plate 18 on which the glass speaker 10A is attached, and the electrical resistance value of the conductive wire 26 is set lower than the electrical resistance value of the conductive adhesive layer 34. Therefore, a portion of the electric charge 36 that has moved to the surface of the glass plate 18 via the conductive portion 30 moves between water molecules 38 attached to the surface of the glass plate 18 and is released to the conductive wire 26. Therefore, a charge path is formed that efficiently grounds the electric charge to the body 100 of the vehicle V via the conductive wire 26.

[0059] Furthermore, in this embodiment, the conductive wire 26 is the negative bus bar of an electric heating wire for clearing the fog from the window glass (glass plate 18) of the vehicle V. Therefore, the bus bar of the electric heating wire of a defogger formed on the window glass of the vehicle can be used as a charge path, and the number of components of the glass speaker 10A can be reduced.

[0060] Second Embodiment A glass-mounted speaker 10B according to the second embodiment will be described below with reference to Fig. 4. Components that are substantially the same as those in the first embodiment described above are given the same reference numerals and their description will be omitted. Fig. 4 is a diagram schematically showing the glass-mounted speaker 10B, and is a cross-sectional view corresponding to Fig. 2 of the first embodiment.

[0061] The glass speaker 10B has a conductive part 40 between the outer shell 22 of the vibrator 20 and the glass plate 18, and the outer shell 22 of the vibrator 20 is fixed to the glass plate 18 via the conductive part 40 and an adhesive layer 42. The conductive part 40 is made up of a mount member 32 and a conductive adhesive layer 34, similar to the conductive part 30 according to the first embodiment.

[0062] On the other hand, the mount member 32 is characterized in that it has a first bonding region S1 that is bonded to the glass plate 18 via a conductive adhesive layer 34, and a second bonding region S2 that is bonded to the glass plate 18 via an adhesive layer 42 that has a higher electrical resistance value than the conductive adhesive layer 34. The other configurations are the same as those of the first embodiment.

[0063] The conductive adhesive layer 34 is preferably positioned as close to the outer periphery of the mounting member 32 as possible so that charges such as static electricity generated in the vibrator 20 can escape to the surface of the glass plate 18, and the first bonding region S1 is formed around the entire periphery of the second side surface 32B of the mounting member 32.

[0064] The second bonding region S2 is formed inside the first bonding region S1. The adhesive layer 42 disposed in the second bonding region S2 is, for example, a resin layer made of a resin-based adhesive. The resin layer may be made of at least one of urethane-based, phenol-based, butyl-based, synthetic rubber-based, acrylic-based, epoxy-based, silicone-based, epoxysilicone-based, and polyvinyl chloride-based resins.

[0065] (Action and effect) As described above, according to the glass-mounted speaker 10B of the second embodiment, the vibrator 20 is fixed to the glass plate 18 via the conductive part 40, and basically follows the configuration of the glass-mounted speaker 10A of the first embodiment. Therefore, the same actions and effects can be obtained.

[0066] Specifically, the conductive section 40 is made up of the mount member 32 and the conductive adhesive layer 34, and is set to have a lower electrical resistance value than the insulator that makes up the outer shell 22. This allows static charge 36 (see FIG. 3) generated at the contact point between the vibrator 20 and the mount member 32 to move to the surface of the glass plate 18 via the conductive section 30. This prevents the vibrator 20 from becoming charged.

[0067] Furthermore, according to this embodiment, the mount member 32 has a first bonding region S1 that is bonded to the glass plate 18 via a conductive adhesive layer 34, and a second bonding region S2 that is bonded to the glass plate 18 via an adhesive layer 42. As a result, the bonding region of the mount member 32 that prioritizes performance as a charge path and the bonding region that prioritizes adhesive strength are fixed by different types of adhesive layers. This allows the adhesive layers to be optimized, and material costs to be reduced.

[0068] In the second embodiment described above, the first bonding area S1 is configured to be formed around the entire outer periphery of the second side surface 32B of the mounting member 32, but this is not limited to this and the first bonding area S1 may be formed only on a part of the outer periphery.

[0069] Third Embodiment A glass-mounted speaker 10C according to the third embodiment will be described below with reference to Fig. 5. Components that are substantially the same as those in the above-described embodiments are given the same reference numerals and their description will be omitted. Fig. 5 is a diagram schematically showing the glass-mounted speaker 10C, and is a cross-sectional view corresponding to Fig. 2 of the first embodiment.

[0070] As shown in this figure, the glass speaker 10C according to the third embodiment basically follows the configuration of the glass speaker 10B according to the second embodiment. The glass speaker 10C according to the third embodiment is characterized in that a part of the conductive part 40 arranged between the outer shell 22 of the vibrator 20 and the glass plate 18 is in contact with the conductive wire 26. As the other configurations are the same as those of the glass speaker 10B according to the second embodiment, detailed explanations will be omitted.

[0071] (Action and effect) According to the glass-mounted speaker 10C of the third embodiment, the vibrator 20 is fixed to the glass plate 18 via the conductive part 40, and basically follows the configuration of the glass-mounted speaker 10B of the second embodiment, so that the same actions and effects can be obtained.

[0072] Furthermore, according to this embodiment, a portion of the conductive portion 40 is in contact with the copper wire, so that a portion of the charge, such as static electricity, generated in the vibrator 20 is quickly released via the conductive wire 26. Therefore, charging of the vibrator 20 is effectively suppressed.

[0073] It goes without saying that the above configuration can be applied to glass speakers of other embodiments, and as long as at least a portion of the conductive portion in each embodiment is in contact with the conductive wire 26, the same effects can be obtained.

[0074] <Fourth embodiment> A glass-mounted speaker 10D according to the fourth embodiment will be described below with reference to Fig. 6. Components that are substantially the same as those in the above-described embodiments are given the same reference numerals and their description will be omitted. Fig. 6 is a diagram schematically showing the glass-mounted speaker 10D, and is a cross-sectional view corresponding to Fig. 2 of the first embodiment.

[0075] The glass speaker 10D has a conductive part 50 between the outer shell 22 of the vibrator 20 and the glass plate 18, and the outer shell 22 of the vibrator 20 is fixed to the glass plate 18 via the conductive part 50 and an adhesive layer 52. The conductive part 50 is made up of the same mount member 32 as in the first embodiment and a conductive adhesive tape 54.

[0076] As shown in FIG. 6 , the second side surface 32B of the mounting member 32 is fixed to the glass plate 18 via an adhesive layer 52. The adhesive layer 52 is, for example, a resin layer made of a resin-based adhesive. The resin layer may be made of at least one of urethane-based, phenol-based, butyl-based, synthetic rubber-based, acrylic-based, epoxy-based, silicone-based, epoxysilicone-based, and polyvinyl chloride-based resins. Furthermore, the adhesive layer 52 may be set to have a higher electrical resistance than the conductive adhesive tape 54, and may be made of an insulating adhesive layer 52.

[0077] Furthermore, it is more preferable that the electrical resistance value of the mount member 32 be set lower than that of the conductive adhesive tape 54 described later, in order to prevent charging of the mount member 32 at the contact portion with the outer shell 22 of the vibrator 20 .

[0078] The conductive adhesive tape 54 can be formed, for example, by a conductive double-sided tape in which a conductive adhesive is applied to both sides of a substrate. The conductive adhesive tape 54 can be formed from a sheet-like nonwoven fabric or the like as the substrate, and is preferably a conductive nonwoven fabric plated with a metal such as copper or nickel. Similarly to the conductive adhesive layer 34, the conductive adhesive can be formed from an adhesive in which conductive particles such as silver paste are mixed with a resin material such as an acrylic, silicone, urethane, epoxy, phenol, or epoxy silicone.

[0079] The conductive adhesive tape 54 is set to have a lower electrical resistance than the insulator that forms the outer shell 22 of the vibrator 20, and the electrical resistance is set to 10 8 It is preferable that the resistance be [Ω] or less.

[0080] As shown in FIG. 6, the conductive adhesive tape 54 includes a first conductive adhesive tape 56 and a second conductive adhesive tape 58 .

[0081] The first conductive adhesive tape 56 has a first end 56A disposed between the vibrator 20 and the mount member 32, and a second end 56B disposed on the main surface of the glass plate 18. Therefore, charges such as static electricity generated by friction between the vibrator 20 and the mount member 32 are quickly dissipated to the surface (main surface) of the glass plate 18 via the first conductive adhesive tape 56.

[0082] The second conductive adhesive tape 58 has a first end 58A disposed between the mounting member 32 and the adhesive layer 52, and a second end 58B disposed on the main surface of the glass plate 18. Therefore, charges such as static electricity generated by friction between the mounting member 32 and the adhesive layer 52 are quickly dissipated to the surface (main surface) of the glass plate 18 via the second conductive adhesive tape 58.

[0083] (Action and effect) According to the glass-mounted speaker 10D of the fourth embodiment, the vibrator 20 is fixed to the glass plate 18 via the conductive part 50, and basically follows the configuration of the glass-mounted speaker 10A of the first embodiment, so that the same actions and effects can be obtained.

[0084] Specifically, the conductive section 50 is made up of the mount member 32 and conductive adhesive tape 54, and is set to have a lower electrical resistance value than the insulator that makes up the outer shell 22. This allows static charge 36 (see FIG. 3) generated at the contact point between the vibrator 20 and the mount member 32 to move to the surface (main surface) of the glass plate 18 via the conductive section 50. This prevents the vibrator 20 from becoming charged.

[0085] The conductive adhesive tape 54 includes a first conductive adhesive tape 56, at least a portion of which is disposed between the vibrator 20 and the mount member 32, and a second conductive adhesive tape 58, at least a portion of which is disposed between the mount member 32 and the adhesive layer 52. Therefore, the first conductive adhesive tape 56 effectively suppresses static electricity buildup due to friction between the vibrator 20 and the mount member 32. The second conductive adhesive tape 58 effectively suppresses static electricity buildup due to friction between the mount member 32 and the adhesive layer 52.

[0086] Furthermore, in this embodiment, the electrical resistance value of the mounting member 32 is set lower than the electrical resistance value of the conductive adhesive tape 54, so the mounting member 32 is less likely to become charged than the conductive adhesive tape 54. This effectively suppresses charging on the mounting member 32 side at the contact point with the outer shell 22 of the vibrator 20, improving the anti-static properties of the vibrator 20.

[0087] Fifth Embodiment A glass-mounted speaker 10E according to the fifth embodiment will be described below with reference to Fig. 7. Components that are substantially the same as those in the above-described embodiments are given the same reference numerals and their description will be omitted. Fig. 7 is a diagram schematically showing the glass-mounted speaker 10E, and is a cross-sectional view corresponding to Fig. 2 of the first embodiment.

[0088] The glass speaker 10E has a conductive part 60 between the outer shell 22 of the vibrator 20 and the glass plate 18, and the outer shell 22 of the vibrator 20 is fixed to the glass plate 18 via the conductive part 60 and an adhesive layer 62. The conductive part 60 is composed of only the conductive adhesive layer 34.

[0089] The vibrator 20 is also characterized by having a first bonding region S1 that is bonded to the glass plate 18 via a conductive adhesive layer 34, and a second bonding region S2 that is bonded to the glass plate 18 via an adhesive layer 62 that has a higher electrical resistance than the conductive adhesive layer 34.

[0090] The conductive adhesive layer 34 is preferably positioned as close to the outer periphery of the vibrator 20 as possible to allow charges such as static electricity generated in the vibrator 20 to escape to the surface of the glass plate 18, and the first bonding region S1 is formed around the entire periphery of the side surface of the vibrator 20 (the surface facing the glass plate 18).

[0091] The second bonding region S2 is formed inside the first bonding region S1. The adhesive layer 42 disposed in the second bonding region S2 is, for example, a resin layer made of a resin-based adhesive. The resin layer may be made of at least one of urethane-based, phenol-based, butyl-based, synthetic rubber-based, acrylic-based, epoxy-based, silicone-based, epoxysilicone-based, and polyvinyl chloride-based resins.

[0092] (Action and effect) As explained above, the glass-mounted speaker according to the present invention may be configured without the mount member 32, as in the glass-mounted speaker 10E according to this embodiment. Even in this case, the same functions and effects as those of the glass-mounted speaker 10A according to the first embodiment can be obtained.

[0093] Specifically, the conductive section 60 is made of a conductive adhesive layer 34, and is set to have a lower electrical resistance value than the insulator that makes up the outer shell 22. This allows static electricity generated at the contact point between the vibrator 20 and the adhesive layer 62 to move to the surface (main surface) of the glass plate 18 via the conductive section 60. This prevents the vibrator 20 from becoming charged.

[0094] Furthermore, in this embodiment, the conductive portion 60 is formed by the conductive adhesive layer 34, and no mount member is provided. This allows the number of parts in the glass-type speaker 10E to be reduced, and also the weight of the glass-type speaker 10E to be reduced.

[0095] Furthermore, according to this embodiment, the vibrator 20 has a first bonding region S1 that is bonded to the glass plate 18 via the conductive adhesive layer 34, and a second bonding region S2 that is bonded to the glass plate 18 via the adhesive layer 62. As a result, the bonding region of the vibrator 20 that prioritizes performance as a charge path and the bonding region that prioritizes adhesive strength are fixed by different types of adhesive layers. This allows the adhesive layers to be optimized, and material costs to be reduced.

[0096] In the above fifth embodiment, the first bonding region S1 is configured to be formed around the entire outer periphery of the side surface of the vibrator, but this is not limited to this and it may be formed only on a part of the outer periphery.

[0097] Sixth Embodiment A glass-mounted speaker 10F according to the sixth embodiment will be described below with reference to Fig. 8. Components that are substantially the same as those in the above-described embodiments are given the same reference numerals and their description will be omitted. Fig. 8 is a diagram schematically showing the glass-mounted speaker 10F, and is a cross-sectional view corresponding to Fig. 2 of the first embodiment.

[0098] The glass speaker 10F has a conductive part 70 between the outer shell 22 of the vibrator 20 and the glass plate 18, and the outer shell 22 of the vibrator 20 is fixed to the glass plate 18 via the conductive part 70 and an adhesive layer 72. The conductive part 70 is composed of only the mount member 32.

[0099] In addition, the second side surface 32B of the mounting member 32 has a first bonding area S1 that abuts against the glass plate 18, and a second bonding area S2 that is bonded to the glass plate 18 via an adhesive layer 72 that has a higher electrical resistance than the mounting member 32.

[0100] The first bonding area S1 abutting against the glass plate 18 is preferably as close to the outer periphery of the mounting member 32 as possible in order to allow charges such as static electricity generated in the mounting member 32 to escape to the surface of the glass plate 18, and in this embodiment, it is formed all around the outer periphery of the second side surface 32B.

[0101] The second bonding region S2, which is bonded via the adhesive layer 72, is provided inside the first bonding region S1. A recess 74 having a flattened cylindrical shape is formed in the second bonding region S2. As a result, the first bonding region S1 protrudes further toward the glass plate 18 than the second bonding region S2.

[0102] The adhesive layer 72 is disposed in the second bonding region S2 by filling the recess 74. The adhesive layer 72 is, for example, a resin layer made of a resin-based adhesive. The resin layer may be made of at least one of urethane-based, phenol-based, butyl-based, synthetic rubber-based, acrylic-based, epoxy-based, silicone-based, epoxysilicone-based, and polyvinyl chloride-based resins.

[0103] (Action and effect) As explained above, the glass speaker according to the present invention may be configured without the conductive adhesive layer, as in the glass speaker 10F according to this embodiment. Even in this case, the same functions and effects as those of the glass speaker 10A according to the first embodiment can be obtained.

[0104] Specifically, the conductive portion 70 is formed by the mount member 32 that abuts against the surface (main surface) of the glass plate 18 in the first bonding region S2, and has an electrical resistance value set lower than that of the insulator that constitutes the outer shell 22. This allows static electricity generated at the contact point between the vibrator 20 and the mount member 32 to move to the surface (main surface) of the glass plate 18 via the first bonding region S1. This prevents the vibrator 20 from becoming charged.

[0105] Furthermore, in this embodiment, the conductive portion 70 is formed by the mount member 32 and does not include a conductive adhesive layer, which reduces the material cost of the glass-type speaker 10E.

[0106] The following additional notes are provided regarding the above-described embodiments.

[0107] (Appendix 1) A glass plate and At least one vibrator that applies vibration to the glass plate, the vibrator has an outer shell made of an insulator and is fixed to the glass plate via a conductive portion disposed between the outer shell and the glass plate; Glass speaker. (Appendix 2) The conductive portion is a mount member having an electrical resistance set lower than that of the insulator and to which the vibrator is attached; a conductive adhesive tape having a lower electrical resistance than the insulator and configured to join at least a portion of the mounting member to the glass plate; It is composed of The conductive adhesive tape is a first conductive adhesive tape at least a portion of which is disposed between the vibrator and the mount member; and a second conductive adhesive tape at least partly disposed between the mounting member and an adhesive layer that bonds the mounting member to the glass plate. Attachment 1. A glass speaker as described in the appendix. (Appendix 3) a support structure for supporting the glass sheet; a conductive wire that is electrically grounded to the support structure, has a lower electrical resistance than the conductive adhesive layer, and is disposed on the main surface of the glass plate to which the vibrator is fixed. A glass speaker as described in Appendix 2. (Appendix 4) The support structure is a vehicle body, The glass plate is a window glass of the vehicle, The conductive wire is a heating wire for clearing the window glass. A glass speaker as described in Appendix 3. (Appendix 5) At least a portion of the conductive wire is in contact with the conductive portion. A glass speaker as described in Appendix 4. (Appendix 6) The conductive portion is a conductive adhesive layer formed of a material having a lower electrical resistance than the insulator and bonding at least a portion of the vibrator to the glass plate; Attachment 1. A glass speaker as described in the appendix. (Appendix 7) a support structure for supporting the glass sheet; a conductive wire that is electrically grounded to the support structure, has a lower electrical resistance than the conductive adhesive layer, and is disposed on the main surface of the glass plate to which the vibrator is fixed. Attachment 6: A glass speaker. (Appendix 8) The support structure is a vehicle body, The glass plate is a window glass of the vehicle, The conductive wire is a heating wire for clearing the window glass. Attachment 7. A glass speaker as described in attachment 7. (Appendix 9) At least a portion of the conductive wire is in contact with the conductive portion. Attachment 8. A glass speaker as described in the appended claim 8. (Appendix 10) The conductive portion is a mount member having an electrical resistance set lower than that of the insulator and to which the vibrator is attached, The mounting member is a first bonding area abutting the glass plate; a second bonding region bonded to the glass plate via an adhesive layer having a higher electrical resistance than the mounting member; Attachment 1. A glass speaker as described in the appendix. (Appendix 11) a support structure for supporting the glass sheet; a conductive wire electrically grounded to the support structure and disposed on the main surface of the glass plate to which the vibrator is fixed; 11. The glass speaker according to claim 10. (Appendix 12) The support structure is a vehicle body, The glass plate is a window glass of the vehicle, The conductive wire is a heating wire for clearing the window glass. 12. The glass speaker according to claim 11. (Appendix 13) At least a portion of the conductive wire is in contact with the conductive portion. 13. The glass speaker according to claim 12. [Explanation of symbols]

[0108] 10A, 10B, 10C, 10D, 10E, 10F Glass Speaker 12 Support structure 16 Opening 18 Glass Plate 20 oscillators 22 Outer shell 26 Conductive wire (heating wire) 30, 40, 50, 60, 70 Conductive part 32 Mounting material 34 Conductive adhesive layer 54 Conductive adhesive tape 56 First conductive adhesive tape 58 Second conductive adhesive tape 42,52,62,72 Other adhesive layers 100 Body V vehicle S1 First junction area S2 Second junction area

Claims

1. A glass plate and At least one vibrator that applies vibration to the glass plate, the vibrator has an outer shell made of an insulator and is fixed to the glass plate via a conductive portion disposed between the outer shell and the glass plate; Glass speaker.

2. The conductive portion is a mount member having an electrical resistance set lower than that of the insulator and to which the vibrator is attached; a conductive adhesive layer having a lower electrical resistance than the insulator and bonding at least a portion of the mounting member to the glass plate; It is composed of 2. The glass speaker according to claim 1.

3. The electrical resistance value of the mounting member is set lower than the electrical resistance value of the conductive adhesive layer.

3. The glass speaker according to claim 2.

4. the mounting member has a first bonding region bonded to the glass plate via the conductive adhesive layer; a second bonding region bonded to the glass plate via another adhesive layer having a higher electrical resistance than the conductive adhesive layer; 3. The glass speaker according to claim 2.

5. a support structure for supporting the glass sheet; a conductive wire that is electrically grounded to the support structure, has a lower electrical resistance than the conductive adhesive layer, and is disposed on the main surface of the glass plate to which the vibrator is fixed.

3. The glass speaker according to claim 2.

6. The support structure is a vehicle body, The glass plate is a window glass of the vehicle, The conductive wire is a heating wire for clearing the window glass.

6. The glass speaker according to claim 5.

7. At least a portion of the conductive wire is in contact with the conductive portion.

7. The glass speaker according to claim 6.

8. The conductive portion is a mount member having an electrical resistance set lower than that of the insulator and to which the vibrator is attached; a conductive adhesive tape having a lower electrical resistance than the insulator and configured to join at least a portion of the mounting member to the glass plate; It is composed of The conductive adhesive tape is a first conductive adhesive tape at least a portion of which is disposed between the vibrator and the mount member; a second conductive adhesive tape at least partly disposed between the mounting member and an adhesive layer that bonds the mounting member to the glass plate; 2. The glass speaker according to claim 1.

9. The electrical resistance value of the mounting member is set lower than the electrical resistance value of the conductive adhesive tape. The glass speaker according to claim 8.

10. The conductive portion is a conductive adhesive layer formed of a material having a lower electrical resistance than the insulator and bonding at least a portion of the vibrator to the glass plate; 2. The glass speaker according to claim 1.

11. the vibrator includes a first bonding region bonded to the glass plate via the conductive adhesive layer; a second bonding region bonded to the glass plate via another adhesive layer having a higher electrical resistance than the conductive adhesive layer; The glass speaker according to claim 10.

12. The conductive portion is a mount member having an electrical resistance set lower than that of the insulator and to which the vibrator is attached, The mounting member is a first bonding area abutting the glass plate; a second bonding region bonded to the glass plate via an adhesive layer having an electrical resistance higher than that of the mounting member; 2. The glass speaker according to claim 1.

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