Glass vibration plate and vibrator-attached glass vibration plate

Abstract

The present invention reduces variation in acoustic performance in a configuration where a plurality of vibrators are attached to a glass plate structure.　A glass vibration plate (11) has: a glass plate structure (12); a mount (22) that is fixed to a main surface of the glass plate structure (12) on one side thereof via an adhesion layer (20) and that accommodates a plurality of vibrators (26) for vibrating the glass plate structure (12); and a cap (24) that is fastened to the mount (22) by using a plurality of bolts (28) and holds the plurality of vibrators (26) on the mount. The mount (22) and the cap (24) are both composed of one component.

Description

Glass diaphragm and glass diaphragm with vibrator 【0001】 The present disclosure relates to a glass diaphragm and a glass diaphragm with a vibrator. 【0002】 The glass diaphragm disclosed in International Publication No. 2023 / 199889 includes a glass plate structure provided in a transportation machine such as a vehicle, a mount fixed to the glass plate structure via an adhesive layer, and a vibrator (exciter) that vibrates the glass plate structure, and a connection portion fixed to the mount and connected to the mount. 【0003】 The vibration device disclosed in Re-Published Japanese Patent Application No. 2020 / 137978 includes a plate-shaped glass vibrator (glass plate structure) and a plurality of vibrators attached to the glass plate structure and generating vibrations in response to an input electrical signal. 【0004】 When a plurality of vibrators are attached to a glass plate structure, if the number of component parts such as mounts increases, the variation in acoustic performance of the final product becomes large due to the accumulation of quality variations and assembly variations of the components. 【0005】 An object of the present disclosure is to obtain a glass diaphragm and a glass diaphragm with a vibrator capable of reducing variations in acoustic performance in a configuration in which a plurality of vibrators are attached to a glass plate structure. 【0006】 The glass diaphragm according to the first aspect of the present disclosure includes a glass plate structure, a mount fixed to one main surface of the glass plate structure via an adhesive layer and accommodating a plurality of vibrators that vibrate the glass plate structure, and a cap fastened to the mount using a plurality of fasteners and holding the plurality of vibrators on the mount, and at least one of the mount and the cap is constituted by a single part. 【0007】A glass diaphragm according to a second aspect of the present disclosure comprises a glass plate structure, a mount fixed to one main surface of the glass plate structure via an adhesive layer, a sub-assembly base fastened to the mount using a plurality of fasteners and housing a plurality of vibrators that vibrate the glass plate structure, and a cap attached to the sub-assembly base and holding the plurality of vibrators to the sub-assembly base, wherein at least one of the mount, the sub-assembly base and the cap is made of a single part. 【0008】 According to this disclosure, in a configuration in which multiple transducers are attached to a glass plate structure, variations in acoustic performance can be reduced. 【0009】 This is a schematic diagram of a glass diaphragm with a transducer according to the first embodiment, viewed from the thickness direction. This is a cross-sectional view showing the state when cut along line 2-2 in Figure 1. This is a cross-sectional view of a glass diaphragm with a transducer according to the second embodiment, viewed from the side. This is a cross-sectional view of a glass diaphragm with a transducer according to a modified example of the second embodiment, viewed from the side. This is a plan view of a glass diaphragm with a transducer according to a first modified example of the first embodiment, viewed from above. This is a plan view of a glass diaphragm with a transducer according to a second modified example of the first embodiment, viewed from above. This is a plan view of a glass diaphragm with a transducer according to a third modified example of the first embodiment, viewed from above. This is a plan view of a glass diaphragm with a transducer according to a fourth modified example of the first embodiment, viewed from above. 【0010】 <First Embodiment> The glass diaphragm 10 with a vibrator according to the first embodiment will be described with reference to the drawings. 【0011】Figure 1 is a schematic diagram of a glass diaphragm 10 with transducers viewed from the thickness direction. As shown in Figure 1, the glass diaphragm 10 with transducers of this embodiment is composed of a glass diaphragm 11 and a plurality (two in this case) of transducers 26. The glass plate structure 12 that constitutes the glass diaphragm 11 of this embodiment is a window glass that is attached to a vehicle. For example, the glass plate structure 12 is used in windshields, side windows, rear windows, rear quarter windows, front bench windows and roof windows, but it can also be used for applications other than vehicles. In Figure 1, an example in which the glass plate structure 12 is used in a windshield is shown, and the X-axis in Figure 1 indicates the vehicle width direction when the glass plate structure 12 is assembled to the vehicle, with the right side of the vehicle coinciding with the positive direction of the X-axis. Also, the Y-axis in Figure 1 indicates the vertical direction when the glass plate structure 12 is assembled to the vehicle, with the upper side of the vehicle coinciding with the positive direction of the Y-axis. 【0012】 Multiple transducers 26 (not shown in Figure 1) are attached to the outer periphery of the glass plate structure 12 (in this case, the left end of the vehicle) via mounts 22. In Figure 1, the mount 22 is attached to the left end of the glass plate structure 12, but the mount 22 may be attached to other positions, or multiple mounts 22 may be attached. For example, mounts 22 may be attached to both the left end and the right end of the vehicle. 【0013】 Figure 2 is a cross-sectional view showing the state when cut along the line 2-2 in Figure 1. As shown in Figure 2, the glass diaphragm 11 of this embodiment is composed of a glass plate structure 12, the mount 22 described above, and a cap 24. Note that the Z-axis in Figure 2 indicates the front-rear direction of the vehicle when the glass plate structure 12 is assembled to the vehicle. Depending on the mounting angle of the glass plate structure 12, the Z-axis direction may have an elevation angle greater than 0° (for example, 67.5°) relative to the horizontal direction as the front-rear direction of the vehicle, and the front side of the vehicle may coincide with the positive direction of the Z-axis. 【0014】(Glass plate structure 12) The glass plate structure 12 is a laminated glass comprising a first glass plate 14, an intermediate layer 18, and a second glass plate 16. The glass plate structure 12 may be made of a single glass plate (single-pane glass), but it is more preferable to be made of laminated glass from the viewpoint of improving the acoustic effect as a glass diaphragm 11. The first glass plate 14 and the second glass plate 16 are made of transparent or translucent inorganic glass. Examples of inorganic glass include soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass. 【0015】 If the glass plate structure 12 is inorganic glass and is a single-pane glass, it is preferable that the glass plate structure 12 is tempered glass. Tempered glass is glass on which a compressive stress layer has been formed, and may be either air-cooled tempered glass or chemically tempered glass. If the tempered glass is physically tempered glass (for example, air-cooled tempered glass), a compressive stress layer may be formed on the glass surface by an operation other than slow cooling, such as rapidly cooling a uniformly heated glass plate from a temperature near its softening point during bending, thereby generating a compressive stress layer on the glass surface due to the temperature difference between the glass surface and the inside of the glass. If the tempered glass is chemically tempered glass, a compressive stress layer may be formed on the glass surface after bending by an ion exchange method or the like. 【0016】 If the glass plate structure 12 is laminated glass, the first glass plate 14 and the second glass plate 16 may both be untempered glass, one of them may be tempered glass, or both may be tempered glass. If both are tempered glass, both may be air-cooled tempered glass, both may be chemically strengthened glass, or one may be air-cooled tempered glass and the other may be chemically strengthened glass. 【0017】At least one of the first glass plate 14 and the second glass plate 16 may be made of organic glass, and only the second glass plate 16 on the mount 22 side, which will be described later, may be made of organic glass. Examples of organic glass include PMMA (polymethyl methacrylate) resin, PC (polycarbonate) resin, PS (polystyrene) resin, PET (polyethyleneterephthalate) resin, PVC (polyvinyl chloride) resin, and cellulose resin. Furthermore, the second glass plate 16 may be a plate-like body made of a material other than glass. For example, a resin plate made of a transparent resin material such as an acrylic plate may be used instead of the second glass plate 16. Alternatively, fiber-reinforced plastic containing glass fibers or carbon fibers may be used instead of the second glass plate 16. 【0018】 Furthermore, if the glass plate structure 12 is laminated glass with an intermediate layer 18 sandwiched between the first glass plate 14 and the second glass plate 16, the thickness of the glass plate structure 12 is preferably 1.0 [mm] or more, more preferably 2.0 [mm] or more, and even more preferably 3.0 [mm] or more. This allows the glass plate structure 12 to have sufficient strength. Also, the thicknesses of the first glass plate 14 and the second glass plate 16 are preferably 5.0 [mm] or less, more preferably 3.0 [mm] or less, and even more preferably 2.0 [mm] or less. Furthermore, the thicknesses of the first glass plate 14 and the second glass plate 16 are preferably 0.1 [mm] or more, more preferably 0.5 [mm] or more, and even more preferably 1.0 [mm] or more. Note that the thicknesses of the first glass plate 14 and the second glass plate 16 may be the same or different. 【0019】The intermediate layer 18 is formed from a resin film containing thermoplastic and thermosetting adhesive materials such as transparent polyvinyl butyral (PVB) or ethylene-vinyl acetate copolymer (EVA) resin films, silicone (PDMS) resins, polyurethane resins, fluorine resins, polyethylene terephthalate resins, and polycarbonate resins. The intermediate layer 18 may also contain materials to enhance sound insulation and materials to absorb ultraviolet and infrared rays, or it may be a multilayer intermediate layer with a functional layer. The thickness of the intermediate layer 18 may be set, for example, between 1.0 nm and 1.0 mm, between 0.1 mm and 0.9 mm, or between 0.2 mm and 0.8 mm. Furthermore, the intermediate layer may contain materials to enhance sound insulation, materials to increase rigidity, and materials to absorb ultraviolet and infrared rays. The intermediate layer may also be in liquid or gel form. Examples of liquid intermediate layers include water, oil, organic solvents, liquid polymers, ionic liquids, and mixtures thereof. More specifically, examples include propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil), modified silicone oil, acrylic acid polymers, liquid polybutadiene, glycerin paste, fluorinated solvents, fluorinated resins, acetone, ethanol, xylene, toluene, water, mineral oil, and mixtures thereof. In particular, it is preferable to include at least one selected from the group consisting of propylene glycol, dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, and modified silicone oil, and it is more preferable to have propylene glycol or silicone oil as the main component. Examples of gel-like intermediate layers include carbon-based, fluorinated, or silicone-based polymer materials.Specifically, 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 its copolymer resins, etc. Alternatively, composite materials combining the above materials may be used. The above materials may be used individually or in combination of two or more. Furthermore, tackifiers and plasticizers for providing adhesion may also be included. 【0020】 Although the glass plate structure 12 is exemplified as laminated glass in which one intermediate layer 18 is sandwiched between two glass plates, it is not limited to this. For example, the glass plate structure 12 may have two or more intermediate layers 18 sandwiched between two glass plates, or a dimmable film that electrically changes the visible light transmittance may be sandwiched between two or more intermediate layers 18. Examples of dimmable films that can be used include TN (Twisted Nematic) type liquid crystal film, VA (Vertical Alignment) type liquid crystal film, polymer dispersed liquid crystal (PDLC) film, suspended particle device (SPD) film, polymer network liquid crystal (PNLC) film, guest host liquid crystal film, electrochromic material, and photochromic material. Furthermore, the glass plate structure 12 may also be configured in which three or more glass plates sandwich an intermediate layer 18 between adjacent glass plates. 【0021】Glass that displays images on part or all of its surface is also conceivable. As a method for displaying images, a liquid crystal film may be sandwiched between the glass plates. Alternatively, a projection screen film may be sandwiched between the glass plates. Furthermore, some or all of the glass may be equipped with film-like solar cell elements for generating electricity from sunlight. To ensure visibility as a vehicle window glass, it is generally preferable to use transparent films that have excellent transparency. These functions may be imparted not only by sandwiching the film between the glass plates, but also by directly microfabrication, printing, transfer, and application of the film to the glass surface, as long as the glass does not lose its function as a glass speaker. 【0022】 In this embodiment, the glass plate structure 12 is formed, for example, in a substantially trapezoidal shape with the vehicle's width direction as the longitudinal direction, and the lower side is longer than the upper side. In addition, a light-shielding layer of a predetermined width may be provided on the outer periphery of the glass plate 12, which is made of a color ceramic layer such as black, dark color, or white, or a color ink layer printed with organic ink or inorganic ink. 【0023】 When the glass plate structure 12 constitutes a window glass for a vehicle, the structure is such that adhesives and other materials cannot be seen from the outside of the vehicle due to the light-shielding layer. The light-shielding layer is provided continuously around the outer edge of the glass plate 12, but there may be at least a portion of the area where the light-shielding layer is not provided. 【0024】 Furthermore, a defogger (not shown) may be formed on the interior surface of the glass plate structure 12 to clear fog (for anti-fogging). The defogger has a plurality of heater wires extending in the width direction of the glass plate 12 and a pair of busbars extending vertically near both sides of the glass plate 12, with several heater wires formed between the pair of busbars. The defogger is formed by printing and firing a silver paste containing silver powder and glass frit onto the surface of the glass plate 12. 【0025】Furthermore, if the glass plate structure 12 is equipped with conductive wires (for example, defoggers and antennas) formed by printing and baking a paste containing a conductive metal (for example, silver paste) onto the main surface on the inside of the vehicle, it is preferable that the transducer 26 be mounted so as not to overlap with the conductive wires. 【0026】 Furthermore, a coating film may be formed on the glass plate structure 12. The coating film may include a Low-E (Low Emissivity) film, an AG (Anti-Glare) film, an AR (Anti-Reflection) film, an AF (Anti-Fingerprint) film, a UV (ultraviolet) cut film, an anti-fogging film, an anti-mold film, and a water-repellent film. 【0027】 Furthermore, the glass plate structure 12 may be colored glass baked with blue, red, green, gray, etc., or it may be privacy glass. Privacy glass is glass with lower transparency than green glass and clear glass, and is also called dark gray glass. Privacy glass can be realized in the glass plate 12 by adjusting the total iron content converted to Fe2O3. The visible light transmittance of privacy glass can be adjusted to, for example, about 40-50% when the plate thickness is 1.8 mm, and about 30-45% when the plate thickness is 2.0 mm. 【0028】 The first glass plate 14 and the second glass plate 16 may each have a cylindrical shape with a single curvature direction, or a double-curved shape with curvature in two orthogonal directions. An excitation region facing the mount 22 is provided on one main surface of the glass plate structure 12. Gravity forming, press forming, and roller forming are used for bending the first glass plate 14 and the second glass plate 16. When the glass plate structure 12 is bent to a predetermined curvature, the radius of curvature of the first glass plate 14 and the second glass plate 16 may be between 1,000 mm and 100,000 mm. 【0029】(Mount 22) A mount 22 is fixed to the main surface of the second glass plate 16 opposite to the intermediate layer 18 via an adhesive layer 20. The mount 22 integrally has multiple (in this case, two) housing sections 22A, 22B for housing multiple (in this case, two) transducers 26, and multiple (in this case, three) fastening sections 22C, 22D, 22E for fastening a cap 24 to the mount 22. This mount 22 is made of a single part. 【0030】 The housing sections 22A and 22B are arranged side by side with spacing between them in the creepage direction along the main surface of the glass plate structure 12 (the surface on the opposite side of the intermediate layer 18 in the second glass plate 16), and the mount 22 is formed in an elongated shape with the creepage direction as its longitudinal side, as an example. Housing section 22A is positioned between fastening section 22C and fastening section 22D, and housing section 22B is positioned between fastening section 22D and fastening section 22E. Housing sections 22A and 22B are connected in the creepage direction by fastening section 22D. This fastening section 22D corresponds to the "connecting section" in this disclosure. Slits S are formed between the housing sections 22A and 22B and the fastening sections 22C, 22D, and 22E to allow the mount 22 to bend to match the curved surface of the glass plate structure 12. In this mount 22, the housing sections 22A and 22B and the fastening section 22D (connecting section) are aligned in a straight line. 【0031】 The housing sections 22A and 22B are formed, for example, as bottomed cylindrical shapes with the top side open. A vibrator 26 is housed in each of the housing sections 22A and 22B. The vibrator 26 is cylindrical with the thickness direction of the glass plate structure 12 as its axis. The dimension W1 of the fastening section 22D (connecting section) along the creepage direction is set to be smaller than the thickness dimension of the vibrator 26 along the thickness direction of the glass plate structure 12 and the width dimension of the vibrator 26 along the creepage direction. Note that the adhesive layer 20 is not shown in Figure 1, and a schematic cross-section of the vibrator 26 is shown in Figure 2. 【0032】Mount 22 may be made of a metal including stainless steel, aluminum, titanium, iron, aluminum alloy, magnesium alloy, etc., and a part of Mount 22 may be made of a resin such as plastic. As the plastic, general engineering plastics such as ABS, PVC, PC, PP, PBT, PA66, PPS, PEEK, PET, and POM may be used, and fiber-reinforced plastics including glass fiber or carbon fiber may also be used. The Young's modulus EM of Mount 20 is 1 × 10⁻⁶. ７6 It is sufficient if it is greater than or equal to [Pa], 1 × 10 ７ [Pa] or higher is preferred, 1 × 10 ８ [Pa] or higher is more preferable. From a processing standpoint, 1 × 10 １２ Pa or lower is preferable. 【0033】 The adhesive layer 20 is positioned on the main surface of the second glass plate 16 opposite to the intermediate layer 18, and adhesives and other adhesives can be used as appropriate. As an adhesive, adhesive tape formed in sheet form can be used. 【0034】 The thickness of the adhesive layer 20 should be 5.0 mm or less, preferably 3.0 mm or less, and more preferably 2.0 mm or less, as a thinner layer allows for more effective transmission of vibrations from the transducer 26 to the glass plate structure 12. Furthermore, the thickness of the adhesive layer 20 should be 0.1 mm or more, preferably 0.3 mm or more, and more preferably 0.5 mm or less, from the viewpoint of fixing the mount 22 to the glass plate structure 12. In this embodiment, the adhesive layer 20 is formed with a constant thickness, but it is not limited to a constant thickness and may have a thickness distribution. 【0035】 (Cap 24) The cap 24 is positioned on the opposite side of the mount 22 from the glass plate assembly 12. The cap 24 has a substantially plate shape with the thickness direction of the glass plate assembly 12 as its thickness direction. The cap 24 integrally has multiple (in this case, two) cap body parts 24A, 24B and multiple (in this case, three) fastening parts 24C, 24D, 24E. This cap 24 is made of a single part. 【0036】The cap body portions 24A and 24B are positioned on the opposite side from the glass plate structure 12 via the respective transducers 26. Cap body portion 24A is positioned between fastening portion 24C and fastening portion 24D, and cap body portion 24B is positioned between fastening portion 24D and fastening portion 24E. The cap body portions 24A and 24B are connected by fastening portion 24D. This cap 24 is formed in an elongated shape with its longitudinal side in the creepage direction along the main surface of the glass plate structure 12. This cap 24 is made of the same material as, for example, the mount 22. 【0037】 A transducer 26 is fixed to the glass plate component 12-side surface of the cap body portions 24A and 24B, respectively. The cap body portions 24A and 24B and each transducer 26 may be mechanically fastened using at least one of bolts, screws, pins, keys, rivets, and clips. Alternatively, the cap body portions 24A and 24B and each transducer 26 may be fixed using adhesive materials such as adhesive tape. 【0038】 The fastening portions 24C, 24D, and 24E are superimposed on the fastening portions 22C, 22D, and 22E of the mount 22 from the side opposite to the glass plate structure 12. Bolts 28 pass through each of these fastening portions 24C, 24D, and 24E. These multiple (three in this case) bolts 28 are screwed into threaded holes (reference numerals omitted) formed in the fastening portions 22C, 22D, and 22E of the mount 22. As a result, the cap 24 is fastened and fixed to the mount 22, and each vibrator 26 is held to the mount 22 by the cap 24. The bolts 28 described above correspond to the "fasteners" in this disclosure. 【0039】Each transducer 26 is connected to a power supply (not shown) and vibrates the glass plate structure 12 in response to an input electrical signal. In this embodiment, the transducer 26 is, as an example, a voice coil motor including a coil and a magnetic circuit. One of the coil and magnetic circuit is fixed to the cap 24, and the other is arranged to be movable relative to the cap 24. When current flows through the coil, vibration is generated by the interaction between the coil and the magnetic circuit, causing the glass plate structure 12 to vibrate via the cap 24 and mount 22. The direction of vibration is in the axial direction (thickness direction) of the transducer 26. Note that the transducer 26 is not limited to a voice coil motor; any actuator capable of transmitting the desired vibration to the glass plate structure 12 can be used, such as a piezo actuator. Note that each transducer 26 may be a speaker such as a tweeter in addition to an actuator. That is, the transducer 26 includes not only actuators capable of transmitting the desired vibration to the glass plate structure 12, but also speakers that have a vibrating part within the transducer 26 itself. Additionally, the mount 22 may be equipped with electrical wiring functionality. Each transducer 26 may be connected directly to the power supply, or they may be connected to the power supply after being bundled together at the mount 22. 【0040】 In the glass diaphragm 10 with the transducer described above, multiple (two in this case) transducers 26 are housed in a mount 22 fixed to the main surface of one side of the glass plate structure 12 via an adhesive layer 20. A cap 24 is fastened to the mount 22 using multiple (three in this case) bolts 28, and the multiple transducers 26 are held to the mount 22 by the cap 24. Both the mount 22 and the cap 24 are made from a single part. In this way, by reducing the number of parts of the mount 22 and cap 24 compared to the number of transducers 26, the cumulative effect of variations in part quality and assembly can be reduced, thereby reducing variations in the acoustic performance of the final product. 【0041】Also, in the present embodiment, the number of bolts 28 (three) is set to be less than twice the number of oscillators 26 (2 × 2 = 4). As a result, the number of fastening points is reduced, so that when attaching a plurality of oscillators 26 to the glass plate assembly 12 on the vehicle production line, the time for the attachment work is shortened and the productivity is improved. 【0042】 Moreover, since the fastening portions 22C, 22D, 22E of the mount 22 and the fastening portions 24C, 24D, 24E of the cap 24 are reduced, the areas of the mount 22 and the cap 24 as viewed from the thickness direction of the glass plate assembly 12 are reduced. As a result, it becomes easier to secure the field of view of the occupant, and the design property of the glass diaphragm 10 with an oscillator can be improved. 【0043】 Further, even if, for example, one of the three fastening points is damaged by an external force or the like, the cap 24 is held on the mount 22 by the other two fastening points, so that the cap 24 and the oscillator 26 can be prevented from falling off the mount 22. In addition, by reducing the number of fasteners (here, bolts 28), an increase in mass and cost can be suppressed. 【0044】 In the present embodiment, the bolt 28 is configured as a fastener, but it is not limited thereto. The fastener may be at least one of a screw, a pin, a key, a rivet, and a clip. As the rivet, a metal rivet such as a blind rivet, a resin rivet, or the like can be used. Further, a bolt, a screw, or the like and an adhesive may be combined for fixing. 【0045】 Also, in the present embodiment, the oscillator 26 is fixed to the cap main body portions 24A, 24B (that is, the cap 24), but it is not limited thereto, and the oscillator 26 may not be fixed to the cap 24. In that case, the oscillator 26 is configured to be sandwiched and held between the cap 24 and the mount 22. In that case, the step of fixing the oscillator 26 to the cap 24 becomes unnecessary, so that the manufacturing efficiency can be improved. This point is the same in the second embodiment described below. 【0046】<Second Embodiment> Next, a second embodiment of the present disclosure will be described. Note that components and operations that are basically the same as those in the first embodiment will be given the same reference numerals as in the first embodiment, and their descriptions will be omitted. 【0047】 Figure 3 is a cross-sectional view of the glass diaphragm 30 with transducers according to the second embodiment, viewed from the side. As shown in Figure 3, the glass diaphragm 10 with transducers of this embodiment is composed of a glass diaphragm 31 and a plurality (in this case, two) of transducers 26. The glass diaphragm 31 is composed of a glass plate structure 12, a mount 32, a sub-assembly base 34, and a plurality (in this case, two) of caps 36. 【0048】 (Mount 32) A mount 32 is fixed to the main surface of the second glass plate 16 opposite to the intermediate layer 18 via an adhesive layer 20. The mount 32 integrally has multiple (in this case, two) base portions 32A, 32B and multiple (in this case, three) fastening portions 32C, 32D, 32E. This mount 32 is made of a single part. 【0049】 The mount body portions 32A and 32B are arranged side by side with a gap between them in the creepage direction along the main surface of the glass plate structure 12, and the mount 32 is formed in an elongated shape with the creepage direction as its longitudinal side. Mount body portion 32A is positioned between fastening portion 32C and fastening portion 32D, and mount body portion 32B is positioned between fastening portion 32D and fastening portion 32E. Mount body portions 32A and 32B are connected in the creepage direction by fastening portion 32D. Slits S are formed between the mount body portions 32A and 32B and the fastening portions 32C, 32D, and 32E to allow the mount 32 to flex to conform to the curved surface of the glass plate structure 12. This mount 32 is made of the same material as the mount 22 according to the first embodiment. 【0050】(Sub-assembly base 34) The sub-assembly base 34 is positioned on the opposite side of the mount 22 from the glass plate structure 12. The sub-assembly base 34 has a substantially plate shape with the thickness direction of the glass plate structure 12 as its thickness direction. The sub-assembly base 34 integrally has multiple (in this case, two) housing sections 34A, 34B for housing multiple (in this case, two) vibrators 26, and multiple (in this case, three) fastening sections 34C, 34D, 34E. This sub-assembly base 34 is made of a single part. 【0051】 The housing section 34A is positioned between the fastening section 34C and the fastening section 34D, and the housing section 34B is positioned between the fastening section 34D and the fastening section 34E. The housing sections 34A and 34B are connected by the fastening section 34D. The housing sections 22A and 22B are formed, for example, as bottomed cylindrical shapes with the top side open. A vibrator 26 is housed in each of the housing sections 22A and 22B. This sub-assembly base 34 is formed in an elongated shape with its longitudinal side in the creepage direction along the main surface of the glass plate structure 12. This sub-assembly base 34 is made of, for example, the same material as the mount 32. 【0052】 The fastening portions 34C, 34D, and 34E are superimposed on the fastening portions 32C, 32D, and 32E of the mount 32 from the side opposite to the glass plate structure 12. Bolts 28 pass through each of these fastening portions 34C, 34D, and 34E. These multiple (three in this case) bolts 28 are screwed into threaded holes (not shown) formed in the fastening portions 32C, 32D, and 32E of the mount 32. As a result, the sub-assembly base 34 is fastened and fixed to the mount 32, and each vibrator 26 is held to the mount 32 by the sub-assembly base 34. 【0053】 The fastening portion 34D corresponds to the "connecting portion" in this disclosure. The dimension W2 of the fastening portion 34D (connecting portion) along the creepage direction of the main surface of the glass plate structure 12 is set to be smaller than the thickness dimension of the transducer 26 along the thickness direction of the glass plate structure 12 and the width dimension of the transducer 26 along the creepage direction. 【0054】(Cap 36) The cap 36 is composed of a cap portion 36A positioned on the opposite side of the glass plate structure 12 to the housing portion 34A, and a cap portion 36B positioned on the opposite side of the glass plate structure 12 to the housing portion 34B. The cap portions 36A and 36B are disc-shaped with the thickness direction of the glass plate structure 12 as their thickness direction. The cap portions 36A and 36B are made of the same material as the cap 24 according to the first embodiment. The cap 36 is composed of these two parts, the cap portions 36A and 36B. 【0055】 A transducer 26 is fixed to the glass plate structure 12-side surface of the cap portions 36A and 36B, respectively. The cap portions 36A and 36B and each transducer 26 may be mechanically fastened using at least one of bolts, screws, pins, keys, rivets, and clips. Alternatively, the cap portions 36A and 36B and each transducer 26 may be fixed using adhesive materials such as adhesive tape. 【0056】 The caps 36A and 36B protrude radially outward from each transducer 26, and these protruding portions serve as fastening portions (not shown in reference numerals) to the sub-assembly base 34. These fastening portions overlap the end face of the sub-assembly base 34 opposite to the glass plate structure 12. Screws 38 pass through each of these fastening portions, and each screw 38 is screwed into a screw hole (not shown in reference numerals) formed in the housing portions 34A and 34B. As a result, the caps 36A and 36B are fastened and fixed to the sub-assembly base 34, and each transducer 26 is held in place by the caps 36A and 36B on the sub-assembly base 34. 【0057】In the glass diaphragm 30 with transducers as described above, a sub-assembly base 34 is fastened to a mount 32, which is fixed to one main surface of the glass plate structure 12 via an adhesive layer 20, using multiple (three in this case) bolts 28. Multiple (two in this case) transducers 26 are housed in the sub-assembly base 34. Cap portions 36A and 36B, which constitute a cap 36, are attached to the sub-assembly base 34, and the multiple transducers 26 are held in place by the cap portions 36A and 36B in the sub-assembly base 34. Both the mount 32 and the sub-assembly base 34 are made from a single component. In this way, by reducing the number of parts in the mount 32 and sub-assembly base 34 compared to the number of transducers 26, the cumulative effect of variations in component quality and assembly can be reduced, thereby reducing variations in the acoustic performance of the final product. 【0058】 Furthermore, in this embodiment, the number of bolts 28 (3) is set to less than twice the number of vibrators 26 (2 x 2 = 4). As a result, the number of fastening points is reduced, which shortens the time required for installation when attaching multiple vibrators 26 to the glass plate structure 12 on a vehicle manufacturing line, thereby improving productivity. 【0059】 Furthermore, in this embodiment, before attaching the multiple transducers 26 to the glass plate structure 12, the multiple transducers 26 and caps 36A and 36B can be assembled into a sub-assembly by mounting them to the sub-assembly base 34. This further reduces the time required for the above-mentioned mounting work and improves productivity. 【0060】 Furthermore, by reducing the number of fastening portions 32C, 32D, and 32E of the mount 32 and the fastening portions 34C, 34D, and 34E of the sub-assembly base 34, the area of ​​the mount 32 and sub-assembly base 34 as viewed from the thickness direction of the glass plate structure 12 is reduced. This makes it easier to ensure the occupant's field of view and improves the aesthetic design of the glass diaphragm 30 with transducer. 【0061】Furthermore, even if, for example, one of the three fastening points is damaged by external force, the sub-assembly base 34 is held in place by the other two fastening points on the mount 32, thus preventing the sub-assembly base 34 from falling off the mount 32. In addition, the reduction in fasteners (in this case, bolts 28) helps to suppress increases in mass and cost. 【0062】 Regarding the mount 32 and the sub-assembly base 34, they may be made of the same material, but there are advantages to using different materials. From the standpoint of rigidity, it is preferable that the mount 32 be made of resin, and the sub-assembly base 34 be made of metal. In other words, it is preferable that the mount 32 and the sub-assembly base 34 are made of materials with different rigidities. If at least one of the mount 32 and the sub-assembly base 34 is made of high rigidity and the other is made of a lightweight material, both weight reduction and rigidity improvement can be expected, which is more preferable from the standpoint of acoustic performance. As a high-rigidity material, one of the materials should have a Young's modulus of at least 1 × 10⁻⁶ ７ [Pa] or higher is preferred, and it is preferable that the difference in Young's modulus is twice that of 25°C, and may be five times or more (for example, 10 times). 【0063】 When providing acoustic members made of different materials, it is preferable that there be a difference in the minimum resonant frequencies inherent to each acoustic member. For example, if the minimum resonant frequency of acoustic member A is f01 and the minimum resonant frequency of acoustic member B is f02, then it is preferable that f01 - f02 ≥ 1, more preferably f01 - f02 ≥ 3, and particularly preferably f01 - f02 ≥ 5. 【0064】 (Modification 1) Figure 4 is a cross-sectional view of a glass diaphragm 30' with an transducer according to a modification of the second embodiment, viewed from the side. As shown in Figure 4, in this modification, the cap portions 24A and 24B are integrally formed with the cases of each transducer 26. In other words, the cap portions 24A and 24B are part of each transducer 26. The other configurations are the same as in the second embodiment. In this modification, since the cap portions 24A and 24B are integrally formed with each transducer 26, the work of attaching each transducer 26 to the sub-assembly base becomes even easier. 【0065】(Modification 2) Figure 5 is a plan view from above of a glass diaphragm 40 with a vibrator according to the first modification of the first embodiment. As shown in Figure 5, in this modification, the glass plate structure 12 is a roof glass. Multiple (two in this case) mounts 22 are fixed to this glass plate structure 12. In Figure 5, the two mounts 22 are schematically shown. The two mounts 22 are located at the center in the front-rear direction of the vehicle at both ends of the glass plate structure 12 in the left-right direction of the vehicle. Each mount 22 houses two vibrators 26 arranged in the front-rear direction of the vehicle. This provides excellent balance when outputting sound from each vibrator 26 to the front and rear seats of the vehicle. In the second embodiment, multiple mounts 32 and sub-assembly bases 34 may also be fixed to the glass plate structure 12. 【0066】 (Modification 3) Figure 6 is a plan view from above of a glass diaphragm 40' with a transducer according to a second modification of the first embodiment. As shown in Figure 6, this modification is configured such that a mount 42 is added to the rear end of the glass plate structure 12 of the vehicle compared to the modification shown in Figure 5. One transducer 26 is housed in this mount 42. This results in an even better balance when outputting sound from each transducer 26 to the front and rear seats of the vehicle. 【0067】(Modification 4) Figure 7 is a plan view from above of a glass diaphragm 50 with a transducer according to a third modification of the first embodiment. As shown in Figure 7, in this modification, a plurality of (two in this case) mounts 52 are fixed to a glass plate structure 12 which is a roof glass. The two mounts 52 are located at both ends in the left-right direction of the vehicle at the rear end of the glass plate structure 12. Each mount 52 has a plurality of (two in this case) housing sections 52A, 52B that house a plurality of (two in this case) transducers 26, and a connecting section 52C that connects the two housing sections 52A, 52B. Each mount 52 is L-shaped when viewed from the thickness direction of the glass plate structure 12, and the housing sections 52A, 52B and the connecting section 52C are arranged non-linearly. Because each mount 52 is L-shaped, visibility is good. Note that the shape of the mount 52 is not limited to the above and can be changed as appropriate according to the shape of the glass plate structure 12, etc. For example, the mount may be T-shaped or V-shaped when viewed from the thickness direction of the glass plate structure 12. Also, in the second embodiment, the multiple mounts 32 and sub-assembly bases 34 may be L-shaped, T-shaped, V-shaped, etc. 【0068】 (Modification 5) Figure 8 is a plan view from above of a glass diaphragm 50' with a vibrator according to the fourth modification of the first embodiment. As shown in Figure 8, this modification has two mounts 52 added to the front end of the glass plate structure 12 of the vehicle, compared to the modification shown in Figure 7. This results in a better balance when outputting sound from each vibrator 26 to the front and rear seats of the vehicle. 【0069】 The following additional information is disclosed regarding the embodiments described above. 【0070】(Note 1) A glass diaphragm comprising: a glass plate structure; a mount fixed to the main surface of one side of the glass plate structure via an adhesive layer and housing a plurality of vibrators that vibrate the glass plate structure; and a cap fastened to the mount using a plurality of fasteners and holding the plurality of vibrators to the mount, wherein at least one of the mount and the cap is made of a single part. (Note 2) A glass diaphragm comprising: a glass plate structure; a mount fixed to the main surface of one side of the glass plate structure via an adhesive layer; a sub-assembly base fastened to the mount using a plurality of fasteners and housing a plurality of vibrators that vibrate the glass plate structure; and a cap attached to the sub-assembly base and holding the plurality of vibrators to the sub-assembly base, wherein at least one of the mount, the sub-assembly base and the cap is made of a single part. (Note 3) The glass diaphragm according to Note 1 or Note 2, wherein the number of fasteners is set to less than twice the number of vibrators. (Note 4) The glass diaphragm according to Note 1 or Note 3, referencing Note 1, wherein the mount has a plurality of housing sections arranged in the creepage direction along the main surface and housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, wherein the dimensions of the connecting section in the creepage direction are set to be smaller than the dimensions of the vibrator in the thickness direction of the glass plate structure and the dimensions of the vibrator in the creepage direction. (Note 5) The glass diaphragm according to Note 1, Note 3, referencing Note 1, or Note 4, wherein the mount has a plurality of housing sections arranged in the creepage direction along the main surface and housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, wherein the plurality of housing sections and the connecting section are arranged in a straight line. (Note 6) The glass diaphragm according to Note 1, Note 3 referencing Note 1, or Note 4, wherein the mount has a plurality of housing sections arranged in the creepage direction along the main surface for housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, and the plurality of housing sections and the connecting section are arranged nonlinearly.(Note 7) A glass diaphragm according to Note 1, Note 3, Note 4, Note 5, or Note 6, comprising a plurality of mounts composed of a single part. (Note 8) A glass diaphragm according to Note 2 or Note 3, relating to Note 2, wherein the sub-assembly base comprises a plurality of housing portions arranged in the creepage direction along the main surface for housing the plurality of vibrators, and a connecting portion connecting the plurality of housing portions in the creepage direction, wherein the dimensions of the connecting portion in the creepage direction are set to be smaller than the dimensions of the vibrator in the thickness direction of the glass plate structure and the dimensions of the vibrator in the creepage direction. (Note 9) The glass diaphragm according to Note 2, Note 3 (referencing Note 2), or Note 8, wherein the sub-assembly base comprises a plurality of housing sections arranged in the creepage direction along the main surface for housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, and the plurality of housing sections and the connecting section are arranged linearly. (Note 10) The glass diaphragm according to Note 2, Note 3 (referencing Note 2), Note 8, or Note 9, wherein the sub-assembly base comprises a plurality of housing sections arranged in the creepage direction along the main surface for housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, and the plurality of housing sections and the connecting section are arranged nonlinearly. (Note 11) The glass diaphragm according to Note 2, Note 3 (referencing Note 2), Note 8, Note 9, or Note 10, comprising a plurality of sub-assembly bases composed of a single part. (Note 12) The glass diaphragm described in Note 2, Note 3 referencing Note 2, Note 8, Note 9, Note 10, or Note 11, wherein the mount and the sub-assembly base are composed of members with different rigidities. (Note 13) The Young's modulus of the material with higher rigidity between the mount and the sub-assembly base is 1 × 10. ７(Note 14) The glass diaphragm described in Note 12, having a pressure of [Pa] or higher. (Note 15) The cap is a glass diaphragm described in any one of Notes 1 to 13, fixed to the plurality of transducers. (Note 16) The plurality of transducers is a glass diaphragm described in any one of Notes 1 to 13, integrally provided with the plurality of transducers. (Note 17) The plurality of transducers is a glass diaphragm described in Note 1, Note 3 referencing Note 1, Note 4, Note 5, Note 6, or Note 7, sandwiched between the cap and the mount. (Note 18) A glass diaphragm with a vibrator, comprising: a glass diaphragm described in Note 1, Note 3, Note 4, Note 5, Note 6, Note 7, Note 14, Note 15, or Note 1, which references Note 1; and the plurality of vibrators housed in the mount. (Note 19) A glass diaphragm with a vibrator, comprising: a glass diaphragm described in Note 2, or Note 3, Note 9, Note 10, Note 11, Note 12, Note 13, Note 14, Note 2, Note 15, or Note 17, which references Note 2; and the plurality of vibrators housed in the sub-assembly base. 【0071】 Furthermore, the disclosure of Japanese Patent Application No. 2024-215454, filed on December 10, 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 were specifically and individually described as being incorporated by reference.

Claims

1. A glass diaphragm comprising: a glass plate structure; a mount fixed to the main surface of one side of the glass plate structure via an adhesive layer and housing a plurality of vibrators that vibrate the glass plate structure; and a cap fastened to the mount using a plurality of fasteners and holding the plurality of vibrators to the mount, wherein at least one of the mount and the cap is made of a single part.

2. A glass diaphragm comprising: a glass plate structure; a mount fixed to one main surface of the glass plate structure via an adhesive layer; a sub-assembly base fastened to the mount using a plurality of fasteners and housing a plurality of vibrators that vibrate the glass plate structure; and a cap attached to the sub-assembly base and holding the plurality of vibrators to the sub-assembly base, wherein at least one of the mount, the sub-assembly base and the cap is made of a single part.

3. The glass diaphragm according to claim 1 or claim 2, wherein the number of fasteners is set to less than twice the number of vibrators.

4. The glass diaphragm according to claim 1, wherein the mount has a plurality of housing sections arranged in the creepage direction along the main surface for housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, and the dimensions of the connecting section in the creepage direction are set to be smaller than the dimensions of the vibrator in the thickness direction of the glass plate structure and the dimensions of the vibrator in the creepage direction.

5. The glass diaphragm according to claim 1, wherein the mount has a plurality of housing sections arranged in the creepage direction along the main surface for housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, and the plurality of housing sections and the connecting section are arranged in a straight line.

6. The glass diaphragm according to claim 1, wherein the mount has a plurality of housing sections arranged in the creepage direction along the main surface for housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, and the plurality of housing sections and the connecting section are arranged nonlinearly.

7. The glass diaphragm according to claim 1, comprising a plurality of mounts composed of a single component.

8. The glass diaphragm according to claim 2, wherein the sub-assembly base has a plurality of housing sections arranged in the creepage direction along the main surface for housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, and the dimensions of the connecting section in the creepage direction are set to be smaller than the dimensions of the vibrator in the thickness direction of the glass plate structure and the dimensions of the vibrator in the creepage direction.

9. The glass diaphragm according to claim 2, wherein the sub-assembly base has a plurality of housing sections arranged in the creepage direction along the main surface for housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, and the plurality of housing sections and the connecting section are arranged in a straight line.

10. The glass diaphragm according to claim 2, wherein the sub-assembly base has a plurality of housing sections arranged in the creepage direction along the main surface for housing the plurality of vibrators, and a connecting section connecting the plurality of housing sections in the creepage direction, and the plurality of housing sections and the connecting section are arranged nonlinearly.

11. The glass diaphragm according to claim 2, comprising a plurality of sub-assembly bases composed of a single component.

12. The glass diaphragm according to claim 2, wherein the mount and the sub-assembly base are composed of members with different rigidities.

13. The Young's modulus of the material with higher rigidity between the mount and the sub-assembly base is 1 × 10⁻⁶ ７ The glass diaphragm according to claim 12, wherein the pressure is [Pa] or higher.

14. The glass diaphragm according to claim 1 or claim 2, wherein the cap is fixed to the plurality of vibrators.

15. The glass diaphragm according to claim 1 or claim 2, wherein the cap is integrally provided with the plurality of vibrators.

16. The glass diaphragm according to claim 1, wherein the plurality of transducers are sandwiched between the cap and the mount.

17. The glass diaphragm according to claim 2, wherein the plurality of transducers are sandwiched between the cap and the sub-assembly base.

18. A glass diaphragm with a vibrator, comprising: a glass diaphragm according to claim 1; and a plurality of vibrators housed in the mount.

19. A glass diaphragm with a vibrator, comprising: a glass diaphragm according to claim 2; and a plurality of vibrators housed in the sub-assembly base.

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