WO2023063370A1 - ガラス振動板、ガラス振動板の製造方法、エキサイタ付きガラス振動板、車両用振動板及び建築物用振動板 - Google Patents

ガラス振動板、ガラス振動板の製造方法、エキサイタ付きガラス振動板、車両用振動板及び建築物用振動板 Download PDF

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Publication number
WO2023063370A1
WO2023063370A1 PCT/JP2022/038108 JP2022038108W WO2023063370A1 WO 2023063370 A1 WO2023063370 A1 WO 2023063370A1 JP 2022038108 W JP2022038108 W JP 2022038108W WO 2023063370 A1 WO2023063370 A1 WO 2023063370A1
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WO
WIPO (PCT)
Prior art keywords
glass
glass plate
diaphragm
connection member
exciter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/038108
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English (en)
French (fr)
Japanese (ja)
Inventor
研人 櫻井
順 秋山
大輔 内田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Inc
Original Assignee
Asahi Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to JP2023554592A priority Critical patent/JPWO2023063370A1/ja
Publication of WO2023063370A1 publication Critical patent/WO2023063370A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Definitions

  • the present invention relates to a glass diaphragm, a method for manufacturing a glass diaphragm, a glass diaphragm with an exciter, a vehicle diaphragm, and a building diaphragm.
  • Patent Documents 1 to 3 disclose a structure for transmitting vibration from an exciter (piezoelectric actuator) corresponding to an input electrical signal to a vibrating plate such as a glass plate.
  • an exciter is fixed to one end of a rod member, which is a vibration transmitting portion, and the other end of the rod member is adhered to the diaphragm via a rod holding member.
  • the configuration of Patent Document 2 includes a diaphragm, a vibration transmission member provided so as to be in contact with the diaphragm, and a piezoelectric actuator that vibrates the vibration transmission member. is transmitted to the diaphragm. This vibration transmitting member is adhered to the diaphragm with an adhesive, an adhesive tape, or the like.
  • Patent Document 3 includes an organic EL panel, a piezoelectric vibrating body, and a conductor for conducting vibration generated by the piezoelectric vibrating body to the organic EL panel and attaching the piezoelectric vibrating body to the organic EL panel.
  • a conductor is fixed with an adhesive at the center of gravity of the organic EL panel.
  • the present invention provides a glass diaphragm having a structure capable of mechanically stably fixing an exciter to the glass diaphragm, a method for manufacturing the glass diaphragm, a glass diaphragm with an exciter, a vehicle diaphragm, and a building diaphragm. for the purpose of providing
  • the present invention consists of the following configurations. (1) a glass plate structure having a concave portion that does not penetrate from one main surface of the glass plate in the thickness direction; a connecting member having a convex portion corresponding to the shape of the concave portion, the convex portion being inserted into the concave portion and attached to the glass plate structure; an adhesive layer disposed between the concave portion and the convex portion; A glass diaphragm with a (2) forming a non-penetrating recess in the thickness direction from one main surface of the glass plate structure; A method for manufacturing a glass diaphragm, wherein a connecting member having a convex portion corresponding to the shape of the concave portion is attached to the glass plate structure by inserting the convex portion into the concave portion via an adhesive layer.
  • the glass diaphragm according to (1) an exciter fixed to the connection member; A glass diaphragm with an exciter.
  • a vehicle diaphragm wherein the glass diaphragm of the glass diaphragm with an exciter according to (3) is a vehicle window glass.
  • a vibration plate for building wherein the glass diaphragm of the glass diaphragm with an exciter according to (3) is window glass of a building.
  • the exciter can be mechanically stably fixed to the glass diaphragm, and deterioration of sound reproduction quality and dropout of the exciter can be suppressed.
  • FIG. 1 is a schematic plan view of a glass diaphragm with an exciter.
  • FIG. 2 is a schematic cross-sectional view of the glass diaphragm shown in FIG. 1, taken along line II-II.
  • FIG. 3 is a process explanatory view showing how the connection member is joined to the glass plate structure.
  • FIG. 4 is a process explanatory view showing how the exciter is fixed to the connection member attached to the glass plate structure.
  • FIG. 5 is an exploded perspective view when the connection member and the exciter are screwed together.
  • FIG. 6A is a schematic cross-sectional view of a glass diaphragm in which a connecting member is joined to a glass plate structure.
  • FIG. 6B is a schematic cross-sectional view of a glass diaphragm in which a connecting member is joined to a glass plate structure.
  • FIG. 6C is a schematic cross-sectional view of a glass diaphragm in which a connection member is joined to the glass plate structure.
  • FIG. 6D is a schematic cross-sectional view of a glass diaphragm in which a connection member is joined to the glass plate structure.
  • FIG. 6E is a schematic cross-sectional view of a glass diaphragm in which a connection member is joined to the glass plate structure.
  • FIG. 6F is a schematic cross-sectional view of a glass diaphragm in which a connection member is joined to the glass plate structure.
  • FIG. 6G is a schematic cross-sectional view of a glass diaphragm in which a connection member is joined to the glass plate structure.
  • FIG. 7A is a schematic cross-sectional view of a glass diaphragm in which spacers are arranged in an adhesive layer.
  • FIG. 7B is a schematic cross-sectional view of a glass diaphragm provided with connecting members having a spacer function.
  • FIG. 7C is a schematic cross-sectional view of a glass diaphragm in which an O-ring-shaped spacer is arranged between the connection member and the first glass plate.
  • FIG. 8A is a schematic cross-sectional view of a glass diaphragm provided with a connecting member in which a connecting member-side through hole is formed.
  • FIG. 8B is a schematic cross-sectional view of a glass diaphragm provided with a connecting member in which a connecting member-side through hole is formed.
  • FIG. 8C is a schematic cross-sectional view of a glass diaphragm provided with a connecting member in which a connecting member-side through hole is formed.
  • FIG. 8D is a schematic cross-sectional view of a glass diaphragm provided with a connection member in which a connection member-side through hole is formed.
  • FIG. 8E is a schematic cross-sectional view of a glass diaphragm provided with a connection member in which a connection member-side through hole is formed.
  • FIG. 9 is an explanatory view showing how the state of filling and the state of curing of the adhesive layer are checked through the through-hole on the connecting member side.
  • FIG. 10 is an explanatory diagram collectively showing the cross-sectional shape of the connection portion-side through hole.
  • FIG. 11 is a schematic cross-sectional view of a glass diaphragm provided with a connecting member having a plurality of projections.
  • 12 is a perspective view of the connecting member shown in FIG. 11.
  • FIG. 13A is a schematic diagram showing another aspect of connecting the connecting member and the exciter by screw fastening.
  • FIG. 13B is a schematic diagram showing another aspect of connecting the connecting member and the exciter by screw fastening.
  • FIG. 13A is a schematic diagram showing another aspect of connecting the connecting member and the exciter by screw fastening.
  • FIG. 13C is a schematic diagram showing another aspect of connecting the connecting member and the exciter by screw fastening.
  • FIG. 14 is a cross-sectional view showing dimensions of each part of the connection member and the glass hole of the glass plate structure.
  • FIG. 15 is a schematic cross-sectional view of a glass plate structure made of laminated glass.
  • FIG. 16 is a plan view of a vehicle in which the glass diaphragm with an exciter is applied to the window glass.
  • 17A is an exploded view of the test piece of Test Example 1.
  • FIG. 17B is a cross-sectional view of the test piece of Test Example 1.
  • FIG. 18A is an exploded view of the test piece of Test Example 2.
  • FIG. 18B is a cross-sectional view of the test piece of Test Example 2.
  • FIG. 1 is a schematic plan view of a glass diaphragm 100 with an exciter.
  • the exciter-equipped glass diaphragm 100 includes a glass diaphragm 11 and an exciter 13 that generates vibration. By driving the exciter 13, the glass diaphragm 11 is vibrated to generate a desired sound.
  • the exciter 13 is a vibrating device that uses an object that contacts the exciter body as a diaphragm and generates sound from the diaphragm.
  • a known exciter can be used for the exciter 13 .
  • the exciter-equipped glass diaphragm 100 when the exciter-equipped glass diaphragm 100 is provided as a side window of a vehicle, the exciter 13 is arranged on the connection portion 15 side with the lifting mechanism (not shown) below the belt line BL. As a result, the sound generated from the glass diaphragm 11 can be supplied into the passenger compartment.
  • the beltline BL corresponds to the lower side of the opening when the side window is fully closed when the side window is attached to the vehicle (door).
  • FIG. 2 is a schematic cross-sectional view of the glass diaphragm 11 shown in FIG. 1 taken along line II-II.
  • the glass diaphragm 11 includes a glass plate structure 17 , a connection member 19 , and an adhesive layer 21 that bonds the connection member 19 to the glass plate structure 17 .
  • the exciter 13 is connected to the connecting member 19 .
  • the glass plate structure 17 shown here is composed of laminated glass having a first glass plate 23, a second glass plate 25, and an intermediate layer 27 sandwiched between the first glass plate 23 and the second glass plate 25. be done.
  • Through-holes 29 are formed in the first glass plate 23 so as to penetrate in the thickness direction from one main surface 23a on which the connection member 19 is arranged to the other main surface 23b.
  • the through hole 29 is circular in plan view of the glass plate structure 17 .
  • the opening of the through hole 29 on the side of the other main surface 23 b is closed with the intermediate layer 27 bonded to the second glass plate 25 .
  • recesses 31 are formed by the through holes 29 in the glass plate structure 17 in which the first glass plate 23 and the second glass plate 25 are superimposed. That is, the glass plate structure 17 has the concave portion 31 that does not penetrate in the plate thickness direction.
  • the intermediate layer 27 is preferably a fluid layer made of fluid such as liquid or liquid crystal, a layer of a gel or a solid film.
  • the intermediate layer 27 has a function of preventing resonance between the first glass plate 23 and the second glass plate 25 or damping vibration of resonance.
  • glass plate structure 17 laminated glass is exemplified here as the glass plate structure 17, it is not limited to this. Details of the glass plate structure 17 will be described later.
  • the connecting member 19 has a convex portion 33 corresponding to the shape of the concave portion 31 formed in the first glass plate 23 .
  • the connection member 19 has a cylindrical protrusion 33 and a flange 35 extending radially outward of the protrusion 33 and having an annular shape in a plan view.
  • a portion of the connection member 19 that protrudes from the recess 31 of the first glass plate 23 is also called a protrusion.
  • the protruding portion means the collar portion 35 and the base portion 30 of the protruding portion 33 that is not inserted into the recessed portion 31 .
  • the Young's modulus of the connection member 19 at 25°C is preferably 0.1 GPa or more.
  • the connection member 19 can be made of a material such as aluminum, an aluminum alloy, a metal material such as stainless steel, ceramics, glass, or a resin material.
  • resin materials include acrylic resins such as polymethyl methacrylate resin (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), urethane, polypropylene (PP), resins, ABS resins, and polybutylene terephthalate (PBT).
  • acrylic resins such as polymethyl methacrylate resin (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), urethane, polypropylene (PP), resins, ABS resins, and polybutylene terephthalate (PBT).
  • nylon, nylon 66, polyphenylene sulfide (PPS), polystyrene (PS), etc. can be used, and a structure having excellent moldability can be obtained.
  • the adhesive layer 21 is formed between the outer peripheral surface 33a of the convex portion 33 of the connecting member 19 and the inner peripheral surface of the concave portion 31 of the first glass plate 23, between the flange portion 35 of the connecting member 19 and the first glass plate 23, It is provided between all or at least one of the intermediate layer 27 and the tip end surface 33b of the protrusion 33 of the connecting member 19 .
  • Materials for the adhesive layer 21 include various adhesives such as thermosetting adhesives, photo-curable adhesives, moisture-curable adhesives, two-liquid mixed adhesives, anaerobic-curable adhesives, and thermoplastic adhesives. can be used.
  • the crosslink density can be increased by adjusting the types and ratios of the materials put into the adhesive, and the heat resistance, chemical resistance, and moisture resistance after curing can be improved.
  • the adhesive can be adhered instantaneously by irradiating with ultraviolet rays, so that the adhesion work time can be shortened.
  • the adhesive layer 21 is preferably made of a group of materials that adhere by thermoplastic film material, such as polyvinyl butyral resin (PVB), ethylene-vinyl acetate copolymer resin (EVA), urethane resin, polyester resin, polyamide resin, and silicone. Resin or the like may be used.
  • the adhesive layer 21 preferably has a low hardness (rubber region) in the operating temperature range (-40°C to 90°C) from the viewpoint of preventing glass cracking due to the difference in linear expansion when bonding to glass. Therefore, the Young's modulus of the adhesive layer 21 is preferably 0.01 MPa or more and 100 MPa or less. Moreover, the lower limit of the shear adhesive strength of the adhesive layer 21 is preferably 0.01 MPa or more, more preferably 0.02 MPa or more, and still more preferably 0.1 MPa or more. The upper limit of shear adhesive strength is preferably as high as possible, but is preferably 30 MPa or less, more preferably 20 MPa or less, and even more preferably 15 MPa or less.
  • the adhesive layer 21 it is preferable not to use a material having a high strength corresponding to the Young's modulus of glass (for example, about 70 GPa).
  • the shear adhesive strength can be measured according to JIS K 6852:1994. Specifically, an autograph (AG-X plus, manufactured by Shimadzu Corporation) may be used to peel with a compressive shear jig, and the measured compressive shear strength may be given as the shear stress.
  • the thickness of the adhesive layer 21 is preferably 1 ⁇ m or more, more preferably 20 ⁇ m or more, and even more preferably 50 ⁇ m or more.
  • the thickness of the adhesive layer 21 may be 5 mm or less, preferably 3 mm or less, more preferably 2 mm or less, and even more preferably 1.5 mm or less.
  • the adhesive layer 21 may also be provided in a region extending radially outward from the flange portion 35 of the connection member 19 .
  • the outer peripheral edge of the flange portion 35 and the first glass plate 23 can be reliably joined without a gap, and an improvement in joint strength can be expected.
  • the adhesive layer 21 in the portion contacting the tip end surface 33b of the projection 33 and the intermediate layer 27 in the portion contacting the adhesive layer 21 function as adhesive layers.
  • the adhesive layer may be formed including part of the intermediate layer 27 .
  • FIG. 3 is a process explanatory view showing how the connection member 19 is joined to the glass plate structure 17.
  • the connection member 19 In order to join the connection member 19 to the glass plate structure 17, first, the inner surface of the concave portion 31 of the glass plate structure 17 and the main surface 23a of the first glass plate 23 facing at least the flange portion 35 of the connection member 19 are bonded together. and an adhesive layer 21 is provided on each of them.
  • the adhesive layer 21 may be provided by applying, spraying, stamping, or the like a liquid adhesive, or may be provided by attaching a sealing material containing an adhesive or an adhesive tape. Further, an adhesive (adhesive layer 21) may be provided on the connecting member 19 side.
  • connection member 19 is fixed to the glass plate structure 17 .
  • FIG. 4 is a process explanatory view showing how the exciter 13 is fixed to the connection member 19 attached to the glass plate structure 17. As shown in FIG. The exciter 13 is mechanically attached to the connecting member 19 and can be attached to and detached from the connecting member 19 .
  • the term "detachable" means that the connection member 19 and the exciter 13 can be attached and detached nondestructively.
  • FIG. 5 is an exploded perspective view when the connecting member 19 and the exciter 13 are screwed together.
  • a configuration for mechanically connecting the connection member 19 and the exciter 13 for example, there is a configuration in which a female thread 37 provided on the exciter 13 and a male thread 39 provided on the outer periphery of the flange portion 35 of the connection member 19 are screwed together. be done.
  • plug-in connection such as taper fitting, caulking connection using rivets or the like, and connection using a clamp can be employed.
  • connection member 19 and the exciter 13 By providing the connection member 19 and the exciter 13 with a screw portion having a male thread 39 and a female thread 37, it is possible to easily attach and detach, and a strong connection form can be obtained. Further, the male screw 39 is provided on a projection part of the connection member 19 projecting from the main surface 23a (see FIG. 2) of the glass plate structure. Therefore, the exciter 13 after screwing is kept low in projection height from the main surface 23a.
  • connection member 19 is provided with the male thread 39 and the exciter 13 is provided with the female thread 37, the combination is not limited to this.
  • a female screw is provided on the inner peripheral surface of a concave circular groove on a part of the surface of the root portion 30 (see FIG. 2) of the connecting member 19, and a male screw is provided on the exciter 13 to fix them. good too.
  • the female thread provided on the surface of the root portion 30 overlaps the center of gravity of the connecting member 19 in plan view.
  • the concave portion 31 is formed in the glass plate structure 17, the convex portion 33 is formed in the connecting member 19, and the convex portion 33 is inserted into the concave portion 31. and the glass plate structure 17, the bonding strength between them and the peeling strength in the shear direction are increased. Even if the adhesive layer 21 deteriorates over time and its adhesive strength decreases, the connection member 19 will not be displaced from the glass plate structure 17 because the convex portion 33 and the concave portion 31 are engaged. . In other words, positional deviation due to long-term creep of the adhesive layer 21 does not occur, and reduction in the acoustic effect can be suppressed. In addition, the adhesive layer 21 inside the concave portion 31 is less exposed to moisture and the outside air, so that aging deterioration can be suppressed.
  • connection member 19 and the exciter 13 are detachably mechanically connected, so that the joint strength can be easily increased, and the exciter 13 can be replaced. Therefore, when the exciter 13 breaks down or is replaced with a new one or another model, the exciter 13 attached to the glass plate structure 17 can be easily replaced without breaking the connection member 19. .
  • the glass plate structure 17 of this configuration is laminated glass of the first glass plate 23 and the second glass plate 25, and the recess 31 is formed by providing the through hole 29 only in the first glass plate 23. .
  • the hole processing is less complicated.
  • the second glass plate 25 is not perforated, it is possible to reliably prevent moisture from entering the concave portion 31 from the second glass plate 25 side.
  • connection member 19 has the flange portion 35, the bonding area between the glass plate structure 17 and the connection member 19 is further increased, and the bonding strength between the two can be improved.
  • connection member 19 is joined to the glass plate structure 17 .
  • 6A to 6G are schematic cross-sectional views of glass diaphragms 11A to 11G in which connection member 19 is joined to glass plate structure 17.
  • FIG. the same reference numerals are assigned to the same members or parts as those described above, and the description thereof will be omitted or simplified.
  • the tip surface 33b of the projection 33 of the connection member 19 may be in contact with the intermediate layer 27, as in the glass diaphragm 11A shown in FIG. 6A.
  • the adhesive layer 21 corresponding to the tip surface 33b can be omitted.
  • the portion of the intermediate layer 27 in contact with the tip surface 33 functions as an adhesive layer. That is, the adhesive layer may be formed including (part of) the intermediate layer 27 .
  • materials for the adhesive intermediate layer 27 include polyvinyl butyral resin (PVB), ethylene-vinyl acetate copolymer resin (EVA), urethane resin, and silicone resin.
  • the protrusions 33 of the connection member 19 may be passed through the intermediate layer 27, and the adhesive layer 21 on the tip surface 33b of the protrusions 33 may be adhered to the second glass plate 25. good.
  • the intermediate layer 27 can be omitted (deleted) and the protrusions 33 can be bonded to the second glass plate 25 .
  • the connecting member 19 is joined to both the first glass plate 23 and the second glass plate 25 so that the vibration from the exciter can be directly transmitted to both the first glass plate 23 and the second glass plate 25 .
  • the transmission characteristics of vibration are improved and the acoustic performance can be enhanced.
  • the second glass plate 25 is formed with a concave portion 41 corresponding to the tip shape of the convex portion 33, and the through hole 29 of the first glass plate 23 and the concave portion 41 are combined.
  • 31 may be provided, and the projection 33 of the connecting member 19 may be inserted into the recess 31 for joining.
  • the side surfaces of the protrusions 33 are engaged with the first glass plate 23 and the second glass plate 25, a joining form that is strong against shear stress can be achieved.
  • the first glass plate 23 may be provided with a non-penetrating concave portion 31, and the convex portion 33 of the connecting member 19 may be inserted into the concave portion 31 and joined.
  • the connection member 19 since the connection member 19 is fixed by the recess 31 that is shallower than the thickness of the first glass plate 23, the amount of material removed from the first glass plate 23 is reduced, and the processing can be completed in a short time. Furthermore, a decrease in the strength of the glass plate itself can be suppressed.
  • the glass plate structure 17A may be a single glass plate like the glass diaphragm 11E shown in FIG. 6E.
  • the concave portion 31 can be formed only by processing the single plate, and the handling and workability of the glass plate structure 17A during processing are simplified.
  • connection member 19A may be columnar without a flange like the glass diaphragm 11F shown in FIG. 6F.
  • the connecting member 19A at least a portion of the cylindrical outer peripheral surface exposed from the glass plate structure 17 has a thread shape and is used as a male screw that can be screwed with the female screw provided on the exciter.
  • the connection member 19B may have an L-shaped cross section having a flange portion 35A only on one side in the radial direction.
  • the flange portion 35A may have a semicircular shape when the glass diaphragm 11G is viewed from above, or may have a polygonal shape such as a triangle or a square.
  • the direction in which the flange portion 35A is provided is preferable because it is possible to secure the joint strength by arranging the flange portion 35A ahead of the direction in which the external force is applied.
  • FIG. 7A is a schematic cross-sectional view of a glass diaphragm 11H in which spacers 45 are arranged on the adhesive layer 21.
  • FIG. A spacer 45 is arranged between the flange portion 35 of the connection member 19 and the first glass plate 23 in the glass diaphragm 11H.
  • the shape of the spacer 45 is arbitrary, such as an annular body arranged radially outside the convex portion 33, a granular body arranged discretely, a rod-shaped body, a spherical body, or the like.
  • the thickness of the adhesive layer 21 can be kept constant, and the first glass plate 23 and the connecting member 19 can be positioned in parallel.
  • the height of the spacer 45 can be appropriately changed according to the surface shape (curved surface, flat surface) of the contact surface.
  • the arrangement position of the spacer 45 may be provided between the first glass plate 23 and the flange portion 35, between the outer peripheral surface 33a of the convex portion 33, and between the tip surface 33b.
  • the spacer 45 is, for example, an annular material, such as an O-ring, which provides airtightness and liquidtightness such as rubber, or an adhesive tape processed into an annular shape, the distance from the outside of the connection member 19 to the convex portion 33 side can be increased. Intrusion of moisture can be prevented, and deterioration of the adhesive layer 21 can be suppressed.
  • FIG. 7B is a schematic cross-sectional view of a glass diaphragm 11I provided with connecting members 19 having a spacer function.
  • the connection member 19 has a protrusion 19 a on a portion of the surface facing the first glass plate 23 .
  • the projecting portion 19a has a constant projecting height, so that the projecting portion 19a functions as a spacer that keeps the distance between the first glass plate 23 and the connecting member 19 constant.
  • the projecting portion 19a shown here may be an annular projection provided on the outer peripheral edge of the collar portion 35, or may be a plurality of projections divided in the circumferential direction.
  • the projecting portion 19 a can be arranged at any position on the surface 35 a of the flange portion 35 facing the first glass plate 23 , without being limited to the outer peripheral edge of the flange portion 35 .
  • the distance between the first glass plate 23 and the connection member 19 is determined by the contact between the solid bodies, so it can be set with high accuracy. Moreover, since there is a portion where the connecting member 19 and the first glass plate 23 are in direct contact, the efficiency of transmitting vibration can be improved.
  • FIG. 7C is a schematic cross-sectional view of a glass diaphragm 11J in which O-ring-shaped spacers 46A and 46B are arranged between the connection member 19 and the first glass plate 23.
  • FIG. An O-ring spacer 46A is arranged between the outer peripheral surface 33a of the projection 33A of the connecting member 19 and the inner peripheral surface of the through hole 29 of the first glass plate 23.
  • FIG. An O-ring-shaped spacer 46B is arranged between the flange portion 35 of the connecting member 19 and the first glass plate 23 .
  • the spacers 46A and 46B are provided at the corners where the outer peripheral surface 33a of the convex portion 33A of the connecting member 19 and the facing surface 35a of the flange portion 35 are connected. It can be arranged at any position on the outer peripheral surface 33 a , and the spacer 46 B can be arranged at any position on the facing surface 35 a of the collar portion 35 .
  • connection member 19 to the first glass plate 23 by the spacers 46A and 46B and the spacer function in two directions, the plate thickness direction and the radial direction.
  • FIG. 8A is a schematic cross-sectional view of a glass diaphragm 11K including a connection member 19 in which connection member-side through holes 47 are formed.
  • the configuration of the glass diaphragm 11K is the same as that of the glass diaphragm 11H shown in FIG. 7A except that the connection member side through hole 47 is provided.
  • the connecting member 19 is formed with a connecting member-side through hole 47 that penetrates the central axis Lc of the columnar projection 33 .
  • the connecting member-side through hole 47 is formed through the center of gravity of the connecting member 19 .
  • the connecting member-side through-hole 47 can be used as a (center) hole for supporting the cutting machine when cutting out the connecting member 19 from the raw material by cutting. It can also be used for other purposes such as holes to be visually confirmed.
  • FIG. 8B is a schematic cross-sectional view of a glass diaphragm 11L including a connecting member 19 in which a plurality of connecting member-side through holes 47 are formed.
  • a plurality of connection member-side through holes 47 may be formed at positions equidistant in the radial direction from the central axis Lc of the connection member 19 .
  • a plurality of connecting member side through holes 47 can be formed along the circumference around the central axis Lc as viewed from the thickness direction of the glass diaphragm 11L.
  • connection member-side through holes 47 are arranged at intervals of 180° in plan view, but three through holes 47 may be arranged at intervals of 120° in plan view. Four may be arranged at every degree, five may be arranged at every 72 degrees, six may be arranged at every 60 degrees, and eight may be arranged at every 45 degrees.
  • the connection member side through holes 47 are arranged at positions where the central angles around the central axis Lc are equal in plan view. According to this, the vibration from the exciter connected to the connection member 19 is isotropically propagated, and a homogeneous acoustic effect can be maintained. Further, by providing a plurality of connection member side through holes 47, the weight of the connection member 19 can be reduced.
  • the connecting member side through holes 47 of each connecting member 19 can be formed at once by punching a plurality of connecting members 19 stacked in the axial direction. According to this, efficient processing suitable for mass production becomes possible. In particular, when the connecting member-side through-hole 47 passes through the center of gravity of the connecting member 19, more stable drilling can be performed without bias.
  • FIG. 8C is a schematic cross-sectional view of a glass diaphragm 11M including a connection member 19 having a connection member-side through hole 47 formed in the flange portion 35.
  • the connecting member-side through holes 47 may be provided at a plurality of locations on the flange portion 35 .
  • the connecting member-side through holes 47 are preferably arranged at equal distances in the radial direction centered on the central axis Lc in a plan view and at positions with equal central angles.
  • a plurality of connecting member-side through holes 47 can be formed along the circumference centered on the central axis Lc from the viewpoint of the direction.
  • annular spacers 45 such as O-rings on both the radially inner side and the radially outer side of the connecting member side through hole 47 to prevent moisture from entering from the connecting member side through hole 47 . preferable.
  • the spacers 45 are arranged at equal distances in the radial direction centered on the central axis Lc in plan view and at equal central angles. By arranging the spacer 45 also on the tip surface 33b of the projection 33, the thickness of the adhesive layer 21 on the tip surface 33b can be kept constant.
  • FIG. 8D is a schematic cross-sectional view of a glass diaphragm 11N including a connecting member 19 in which a connecting member-side through hole 47 is formed in the convex portion 33 and the flange portion 35.
  • the connection member side through hole 47 may be provided in both the convex portion 33 and the flange portion 35 .
  • the arrangement of the connection member-side through holes 47 provided in the collar portion 35 is the same as in the case shown in FIG. 8C.
  • FIG. 8E is a schematic cross-sectional view of a glass diaphragm 11P including a connecting member 19 in which connecting member-side through holes 49 having different hole diameters are provided in the projections 33.
  • the connecting member-side through-hole 47 may have a large-diameter through-hole 31c and a small-diameter through-hole 31d. Also, the connecting member-side through hole 47 may have a portion whose diameter gradually increases and widens in a tapered shape in the thickness direction.
  • FIG. 9 is an explanatory diagram showing how the state of filling and the state of curing of the adhesive layer 21 are checked through the connecting member-side through hole 47 .
  • the connection member 19 is made of an opaque resin material or metal material, it may be difficult to confirm whether the adhesive layer 21 is firmly in contact with the connection member 19 and whether the amount of adhesive is sufficient. be. Therefore, by providing the connecting member side through hole 47 in the connecting member 19 , the adhesive layer 21 can be directly visually recognized through the connecting member side through hole 47 .
  • the connecting member-side through-hole 47 is provided, the adhesive rises through the connecting member-side through-hole 47 due to its internal pressure.
  • FIG. 10 is an explanatory diagram collectively showing the cross-sectional shape of the connecting member-side through hole 47.
  • the cross-sectional shape of the connecting member-side through hole 47 described above in the axial direction vertical cross-section is not limited to a circle.
  • the cross-sectional shape of the connecting member-side through-hole 47 is rectangular, triangular, cross-shaped, L-shaped, D-shaped, inclined trapezoid, regular hexagon, regular octagon, cross-shaped, trapezoid, right-angled triangle, quadrangle with an inclined upper side, and home plate type. , star, rhombus, ellipse, irregular shape, and the like.
  • connection member side through holes 47 When a plurality of connecting member side through holes 47 are provided, they may have a plurality of the same cross-sectional shape, or may have a plurality of different cross-sectional shapes. In other words, the combination of cross-sectional shapes is arbitrary.
  • the connection member side through hole 47 may be formed by punching or by cutting with a drill or the like.
  • connection form between the exciter 13 and the connection member 19 is a non-rotational type (insertion type connection, caulking connection such as a rivet, connection using a clamp, etc.) other than the above-described screw connection, it is connected to the exciter 13 side.
  • a configuration in which a protrusion having the same cross-sectional shape as that of the member-side through hole 47 is provided and the protrusion is inserted into the connecting member-side through hole 47 may be employed. In that case, the exciter 13 can be positioned in the rotational direction, and the anti-rotation function can be exhibited.
  • connection member 19 may have a plurality of protrusions.
  • FIG. 11 is a schematic cross-sectional view of a glass diaphragm 11Q including a connection member 19 having a plurality of projections 33A and 33B.
  • 12 is a perspective view of the connecting member 19 shown in FIG. 11.
  • the connection member 19 has a pair of protrusions 33A and 33B.
  • the convex portion 33A and the convex portion 33B are separated from the central axis Lc in opposite directions and are arranged at positions equidistant from the central axis Lc.
  • Concave portions 31A and 31B corresponding to the convex portions 33A and 33B are formed in the first glass plate 23, respectively.
  • the concave portion 31A and the convex portion 33A, and the concave portion 31B and the convex portion 33B are joined to each other through the adhesive layer 21 while being engaged with each other.
  • the joint strength is improved, and they function as rotation stoppers around the central axis Lc.
  • the protrusions 33A, 33B and the recesses 31A, 31B are arranged point-symmetrically with respect to the central axis Lc, the vibration from the exciter can be evenly propagated.
  • loosening and rotation of the connection member 19 due to excitation vibration from the exciter 13 can be suppressed, and a configuration can be achieved in which positional displacement does not occur over a long period of time.
  • the thickness of the projections 33A and 33B it is possible to directly face the curved glass and fix it, which is preferable because the vibration transmissibility is improved.
  • connection member 19 and the exciter 13 are not limited to the form of connection shown in FIG.
  • FIG. 13A is a schematic diagram showing another aspect of connecting the connecting member 19 and the exciter 13 by screw fastening.
  • the connection member 19 is formed with a recess 51 centered on the central axis Lc on the side facing the exciter 13 , and a female thread 53 is formed on the inner peripheral surface of the recess 51 .
  • the exciter 13 has a convex portion 55 formed on the side facing the connecting member 19 , and a male thread 57 is formed on the outer peripheral surface of the convex portion 55 .
  • a concave portion 51 of the connecting member 19 is formed to have a larger diameter than the convex portion 33 of the connecting member 19 , and a female thread 53 is formed in the flange portion 35 .
  • the exciter 13 can be firmly fixed to the connecting member 19 with a light tightening force. Also, since the tightening can be released with a relatively light force when removing the exciter 13, the attachment and detachment of the exciter 13 is facilitated.
  • FIG. 13B is a schematic diagram showing another aspect of connecting the connecting member 19 and the exciter 13 by screw fastening.
  • a concave portion 51 is formed in the convex portion 33 of the connecting member 19 along the central axis Lc, and a female thread 53 is formed in the inner peripheral surface of the concave portion 51 .
  • the exciter 13 is provided with a convex portion 55 corresponding to the concave portion 51 , and a male thread 57 is formed on the outer periphery of the convex portion 55 .
  • the outer diameter of the convex portion 55 is smaller than that of the convex portion 33 of the connecting member 19 .
  • connection member 19 According to this configuration, the contact area between the flange portion 35 of the connection member 19 and the exciter 13 after screwing is increased, and vibration from the exciter 13 is easily propagated to the connection member 19 .
  • FIG. 13C is a schematic diagram showing another aspect of connecting the connecting member 19 and the exciter 13 by screw fastening.
  • a concave portion 51 is formed along the central axis Lc in the convex portion 33 of the connecting member 19 , a female screw 53 is formed on the inner peripheral surface of the concave portion 51 on the bottom side, and a thread larger than the female screw 53 is formed on the opening side of the concave portion 51 .
  • a diametrical inner peripheral surface 59 is formed.
  • a through-hole 63 is inserted into a part of the inner peripheral surface 59 for radially guiding a power supply line 61 from the exciter 13 inside the flange portion 35 .
  • a convex portion 55 corresponding to the concave portion 51 is formed on the exciter 13 side, and a male screw 57 is formed on the tip side of the convex portion 55 .
  • An outer peripheral surface 65 corresponding to the inner peripheral surface 59 is formed on the root side of the convex portion 55 , and an opening of a wiring path 67 for introducing the power supply line 61 is provided in a part of the outer peripheral surface 65 .
  • the female thread 53 of the connecting member 19 and the male thread 57 of the exciter 13 can be joined by screwing them together.
  • the power supply line 61 can be inserted into the wiring path 67 through the through hole 63, and power can be supplied to the exciter 13.
  • FIG. 13C shows the opening of the wiring path 67 on the outer peripheral surface 65 directed in one direction, the opening has a size sufficient for inserting the feeder line 61 . In this case, there is no need to wire the feeder line 61 from the outside of the exciter 13 to the connecting member 19, the exposure of the wiring from the exciter 13 can be eliminated, and there is no fear of disconnection due to the wiring being drawn carelessly.
  • FIG. 14 is a cross-sectional view showing dimensions of each part of the connection member 19 and the glass hole of the glass plate structure 17.
  • the connection member 19 described above has the following dimensions.
  • the hole diameter of the glass hole of the glass plate structure 17 is ⁇ D and the outer diameter of the projection 33 of the connecting member 19 is ⁇ d, ⁇ D ⁇ d.
  • the outer diameter ⁇ d is preferably 0.5 mm ⁇ d ⁇ 100 mm, more preferably 1 mm ⁇ d ⁇ 80 mm, and still more preferably 5 mm ⁇ d ⁇ 50 mm.
  • H be the height of the projection 33 of the connection member 19, and tg be the thickness of one glass plate of the glass plate structure 17.
  • the height H is preferably 0.1 mm ⁇ H ⁇ tg, more preferably 0.5 mm ⁇ H ⁇ tg, and still more preferably 1.0 mm ⁇ H ⁇ tg.
  • the thickness t of the flange portion 35 of the connecting member 19, that is, the amount of protrusion outward from one main surface of the glass plate structure 17 is t.
  • the protrusion amount t is preferably 0.1 mm ⁇ t ⁇ 30 mm, more preferably 0.5 mm ⁇ t ⁇ 10 mm. If the amount of protrusion is within the above range, interference with other members can be suppressed, and handleability is improved.
  • the maximum diameter ⁇ dc of the connecting member 19 and the outer diameter ⁇ d of the projection 33 satisfy ⁇ d ⁇ dc, and the maximum diameter ⁇ dc is preferably 5 mm ⁇ dc ⁇ 1000 mm, more preferably 10 mm ⁇ dc ⁇ 800 mm.
  • the extension lengths of the flange portion 35 of the connection member 19 may be different lengths or may be the same length. good.
  • the extension lengths L F1 and L F2 are preferably 0.5 mm ⁇ L F1 ⁇ 500 mm and 0.5 mm ⁇ LF2 ⁇ 500 mm, and 1.0 mm ⁇ LF1 ⁇ 400 mm and 1.0 mm ⁇ LF2 ⁇ 400 mm. is more preferred.
  • a notch portion 69 may be provided on the surface of the flange portion 35 of the connecting member 19 on the side of the glass plate structure 17 .
  • the notch 69 may be a concave portion, a cut off corner, or a roughened surface.
  • the notch 69 is filled with the adhesive, so that excess adhesive can be absorbed and dripping of the adhesive can be prevented. Also, the bonding strength can be improved by the anchoring effect of the adhesive cured in the notch 69 .
  • the glass plate structure 17 may be a laminated glass in which a plurality of glass plates described above are laminated and an intermediate layer is provided between these glass plates, or a single glass plate (also referred to as a “single plate”). good.
  • a single plate also referred to as a “single plate”. good.
  • the configuration can be simplified and the vibration characteristics can be easily controlled.
  • FIG. 15 is a schematic cross-sectional view of a glass plate structure 17 made of laminated glass.
  • the glass diaphragm 11 is formed by laminating a first glass plate 23 and a second glass plate 25 (hereinafter also referred to as a pair of glass plates 23 and 25), and including an intermediate layer 27 between the glass plates 23 and 25. Configured.
  • the shape of the plate surface of the glass plate structure 17 is arbitrary, and depending on the application site, square, rectangle, parallelogram, trapezoid, other polygons, circle, ellipse, or a shape in which these shapes are combined. It's okay.
  • the total thickness of the glass plate structure 17 is preferably 2 mm or more, more preferably 3 mm or more, and even more preferably 4 mm or more. As a result, necessary and sufficient strength can be obtained even when applied to vehicles and buildings.
  • the intermediate layer 27 prevents the glass plates 23 and 25 from resonating or attenuates the vibration of the resonance of the glass plates 23 and 25 . Due to the presence of the intermediate layer 27, the glass plate structure 17 can have a higher loss factor than the glass plate alone.
  • the loss factor can be measured, for example, by a dynamic elastic modulus test method such as the resonance method, and the one calculated by the half-value width method is used.
  • W is the frequency width at a point -3 dB lower than the peak value of the resonance frequency f and amplitude h of the material, that is, the point at the maximum amplitude -3 [dB].
  • Define loss factor. Resonance can be suppressed by increasing the loss factor.
  • a large loss factor means that the frequency width W is relatively large with respect to the amplitude h, and the peak is broadened. In other words, the greater the loss factor, the greater the vibration damping capacity.
  • the loss factor is a value specific to the material, etc. For example, in the case of a
  • the longitudinal wave sound velocity value in the plate thickness direction of the glass plate structure 17 is preferably 4.0 ⁇ 10 3 m/s or more because the higher the sound speed, the higher the reproducibility of high-frequency sound when it is used as a diaphragm. 4.5 ⁇ 10 3 m/s or more is more preferable, and 5.0 ⁇ 10 3 m/s or more is still more preferable. Although the upper limit is not particularly limited, the longitudinal wave sound velocity value is preferably 7.0 ⁇ 10 3 m/s or less.
  • the longitudinal wave sound velocity value refers to the velocity at which the longitudinal wave propagates in the diaphragm.
  • a longitudinal wave sound velocity value and a Young's modulus, which will be described later, can be measured by an ultrasonic pulse method described in Japanese Industrial Standards (JIS R 1602-1995).
  • the glass plate structure 17 has a high in-line transmittance, it can be applied as a translucent member. Therefore, the glass plate structure 17 preferably has a visible light transmittance of 60% or more, more preferably 65% or more, and even more preferably 70% or more, as determined in accordance with Japanese Industrial Standards (JIS R 3106-1998). preferable.
  • the translucent member include transparent speakers, transparent microphones, construction, opening members for vehicles, and the like.
  • the difference between the refractive index of the intermediate layer 27 and the refractive index of the pair of glass plates 23 and 25 in contact with the intermediate layer 27 is preferably 0.2 or less, more preferably 0.1 or less, and even more preferably 0.01 or less.
  • the glass plates 23 and 25 here may be inorganic glass or organic glass.
  • organic glass PMMA-based resin, PC-based resin, PS-based resin, PET-based resin, PVC-based resin, cellulose-based resin, etc. can be used as general transparent resins.
  • the resin material it is preferable to use a resin material that can be molded into a flat plate shape or a curved plate shape.
  • a resin material, carbon fiber, Kevlar fiber, or the like obtained by compounding a high-hardness filler such as glass fiber is preferable.
  • intermediate layer 27 between the plurality of laminated glass plates it is preferable to use a fluid layer such as a liquid or a liquid crystal, a gel-like material, or a solid film.
  • a fluid layer such as a liquid or a liquid crystal, a gel-like material, or a solid film.
  • the glass plate structure 17 can achieve a high loss factor by providing a fluid layer containing a liquid as the intermediate layer 27 between at least the pair of glass plates 23 and 25 . Above all, by setting the viscosity and surface tension of the fluid layer within a suitable range, the loss factor can be further increased. It is considered that this is because, unlike the case where the pair of glass plates are provided via an adhesive layer, the pair of glass plates do not adhere to each other and each glass plate maintains its vibration characteristics.
  • the term "fluid” as used herein refers to liquids, semi-solids, mixtures of solid powders and liquids, solid gels (jelly-like substances) impregnated with liquids, etc. It means to include all things.
  • the fluid layer preferably has a viscosity coefficient of 1 ⁇ 10 ⁇ 4 to 1 ⁇ 10 3 Pa ⁇ s at 25° C. and a surface tension of 15 to 80 mN/m at 25° C. If the viscosity is too low, it becomes difficult to transmit vibrations, and if the viscosity is too high, the pair of glass plates positioned on both sides of the fluid layer will adhere to each other and exhibit vibration behavior as a single glass plate, thus damping the resonance vibration. become difficult. On the other hand, if the surface tension is too low, the adhesion between the glass plates will decrease, making it difficult to transmit vibrations. If the surface tension is too high, the pair of glass plates positioned on both sides of the fluid layer are likely to adhere to each other, exhibiting vibration behavior as a single glass plate, making it difficult to attenuate resonance vibration.
  • the fluid layer preferably has a viscosity coefficient of 1 ⁇ 10 ⁇ 4 to 1 ⁇ 10 3 Pa ⁇ s at 25° C. and a surface tension of 15 to 80 mN/m at 25° C. If the viscosity is too low, it becomes difficult to transmit vibrations, and if the viscosity is too high, the pair of glass plates positioned on both sides of the fluid layer will adhere to each other and exhibit vibration behavior as a single glass plate, thus damping the resonance vibration. become difficult. Also, if the surface tension of the fluid layer is too low, the adhesion between the glass plates will be reduced, making it difficult to transmit vibrations. If the surface tension is too high, the pair of glass plates positioned on both sides of the fluid layer are likely to adhere to each other, exhibiting vibration behavior as a single glass plate, making it difficult to attenuate resonance vibration.
  • the viscosity coefficient of the fluid layer at 25° C. is more preferably 1 ⁇ 10 ⁇ 3 Pa ⁇ s or more, and even more preferably 1 ⁇ 10 ⁇ 2 Pa ⁇ s or more. Further, the viscosity coefficient of the fluid layer at 25° C. is more preferably 1 ⁇ 10 2 Pa ⁇ s or less, and even more preferably 1 ⁇ 10 Pa ⁇ s or less.
  • the surface tension of the fluid layer at 25° C. is more preferably 20 mN/m or more, still more preferably 30 mN/m or more.
  • the viscosity coefficient of the fluid layer can be measured using a rotational viscometer.
  • the surface tension of the fluid layer can be measured by a ring method or the like.
  • the fluid layer preferably has a vapor pressure of 1 ⁇ 10 4 Pa or less at 25° C. and 1 atm, more preferably 5 ⁇ 10 3 Pa or less, even more preferably 1 ⁇ 10 3 Pa or less.
  • a seal or the like may be applied so that the fluid layer does not evaporate. In that case, it is necessary that the sealing material does not interfere with the vibration of the glass diaphragm.
  • the thickness of the fluid layer may be 1/10 or less of the total thickness of the pair of glass plates.
  • the following is preferable, 1/30 or less is more preferable, 1/50 or less is still more preferable, 1/70 or less is particularly preferable, and 1/100 or less is most preferable.
  • the thickness of the fluid layer may be 100 ⁇ m or less, preferably 50 ⁇ m or less, more preferably 30 ⁇ m or less, even more preferably 20 ⁇ m or less, and 15 ⁇ m.
  • the following are particularly preferable, and 10 ⁇ m or less is most preferable.
  • the lower limit of the thickness of the fluid layer is preferably 0.01 ⁇ m or more from the viewpoint of film formability and durability.
  • the fluid layer is chemically stable, and it is preferable that the fluid layer and the pair of glass plates located on both sides of the fluid layer do not react.
  • Chemically stable means, for example, a material that is less altered (deteriorated) by light irradiation, or a material that does not solidify, vaporize, decompose, discolor, or chemically react with glass in a temperature range of at least -20 to 70°C. do.
  • components of the fluid layer include water, oil, organic solvents, liquid polymers, ionic liquids and mixtures thereof. More specifically, propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil), modified silicone oil, acrylic acid polymer, liquid polybutadiene, glycerin Paste, fluorinated solvent, fluorinated resin, acetone, ethanol, xylene, toluene, water, mineral oil, mixtures thereof, and the like.
  • it preferably contains at least one selected from the group consisting of propylene glycol, dimethylsilicone oil, methylphenylsilicone oil, methylhydrogensilicone oil and modified silicone oil, and more preferably contains propylene glycol or silicone oil as the main component.
  • slurry in which powder is dispersed can also be used as a fluid layer.
  • a uniform fluid is preferable for the fluid layer, but the slurry is effective when imparting design and functionality such as coloring and fluorescence to the glass diaphragm.
  • the powder content in the fluid layer is preferably 0 to 10% by volume, more preferably 0 to 5% by volume.
  • the particle size of the powder is preferably 10 nm to 1 ⁇ m, more preferably 0.5 ⁇ m or less.
  • the fluid layer may contain a fluorescent material.
  • a fluorescent material in this case, it may be a slurry-like fluid layer in which the fluorescent material is dispersed as powder, or a uniform fluid layer in which the fluorescent material is mixed as a liquid. This makes it possible to impart optical functions such as light absorption and light emission to the glass diaphragm.
  • the intermediate layer 27 is a fluid layer containing a liquid and the first glass plate 23 is provided with the through holes 29 (see FIG. 2), the liquid in the intermediate layer 27 is sealed so as not to leak from the through holes 29.
  • a structure is preferably provided.
  • This encapsulation structure can be formed, for example, by a process similar to the liquid crystal polymer encapsulation process in liquid crystal displays. Specifically, a resin material (cured resin) that serves as a sealing material is applied in advance to the portion to be processed of the through hole 29 of the first glass plate 23 . Then, through holes 29 are formed in the laminated glass obtained by overlapping the first glass plate 23 and the second glass plate 25 by using a laminated glass hole processing process.
  • the through holes 29 are formed in the first glass plate 23 in advance, and the first glass plate 23 and the second glass plate 25 are overlapped.
  • a ring-shaped sealing material is provided at a position corresponding to the through hole 29 of the second glass plate 25 according to the shape of the through hole 29 .
  • the sealing material is sandwiched between the first glass plate 23 and the second glass plate 25, so that the fluid layer between the first glass plate 23 and the second glass plate 25 leaks through the through holes 29. to prevent
  • a preferable material is a substance that satisfies any one of the following properties (1) to (3).
  • the thickness of the intermediate layer 27 is 1 mm or less
  • the compression storage modulus is 1.0 ⁇ 10 4 Pa or less at a temperature of 25° C.
  • the compression storage modulus is compressed at a temperature of 25° C. and 1 Hz. higher than the loss modulus.
  • the fluidity of the intermediate layer 27 is suppressed and the loss factor is improved.
  • the loss factor of the glass diaphragm is improved by increasing the thickness of the intermediate layer 27, there is a trade-off relationship in which the sound velocity value of the glass diaphragm 11 decreases as the intermediate layer 27 becomes thicker.
  • the material of the intermediate layer 27 satisfies the characteristic (2), so that when the intermediate layer 27 is thin, the glass diaphragm 11 has a higher loss factor and secures a high sound velocity value. can.
  • the thickness of the intermediate layer 27 is preferably 1 mm or less, more preferably 100 ⁇ m or less, even more preferably 10 ⁇ m or less, and particularly preferably 5 ⁇ m or less, from the viewpoint of obtaining a high loss factor of the glass diaphragm 11 . From the viewpoint of the surface roughness of the glass plates 71 and 73, it is preferably 1 ⁇ m or more.
  • the material of the intermediate layer 27 preferably has a compression storage elastic modulus of 1.0 ⁇ 10 4 Pa or less at a temperature of 25° C., more preferably 7.0 ⁇ 10 3 Pa or less, and more preferably 5.0 ⁇ 10 3 Pa or less is more preferable. If the material satisfies the characteristic (2), the thinner the thickness of the intermediate layer 27, the higher the loss factor in the glass diaphragm 11 can be obtained. Moreover, from the viewpoint of fluidity, 1.0 ⁇ 10 2 Pa or more is preferable.
  • a gel-like material can also be used as the material of the intermediate layer 27 .
  • Materials constituting the intermediate layer 27 include, for example, carbon-based, fluorine-based, or silicone-based polymeric materials on the premise that any one of the above characteristics (1) to (3) is satisfied. .
  • a composite material obtained by combining the above materials may be used. The above materials may be used alone or in combination of two or more.
  • the ratio of the substance satisfying the above specific properties in the intermediate layer 27 is preferably 10% by mass to 100% by mass, more preferably 30% by mass to 100% by mass, even more preferably 50% by mass to 100% by mass, and 70% by mass. % to 100% by weight is particularly preferred.
  • the material of the intermediate layer 27 includes polyvinyl butyral resin (PVB), ethylene-vinyl acetate copolymer resin (EVA), polyurethane resin, and silicone, which are suitably used as intermediate films for laminated glass. resins, polyethylene terephthalate resins, polycarbonate resins, silicone resins, and the like.
  • ⁇ Glass plate> It is also possible to color at least one of the glass plates constituting the glass plate structure 17 and at least one of the intermediate layer 27 . This is useful, for example, when the glass plate structure 17 is desired to have a design, or when functions such as IR cut, UV cut, and privacy glass are added.
  • each of the glass plates 23 and 25 is preferably 0.5 mm to 15 mm, more preferably 0.8 mm to 10 mm, and even more preferably 1.0 mm to 8 mm.
  • a physically strengthened glass plate or a chemically strengthened glass plate can also be used for at least one of the glass plates constituting the glass plate structure. This is useful to prevent breakage of the glass sheet construction.
  • the glass plate positioned on the outermost surface of the glass plate structure be a physically strengthened glass plate or a chemically strengthened glass plate, and all of the glass plates constituting the glass plate structure are physically strengthened.
  • a glass plate or a chemically strengthened glass plate is more preferred.
  • crystallized glass or phase-separated glass is also useful in terms of increasing the longitudinal wave sound velocity value and strength.
  • the glass plate structure may be flat or curved.
  • the glass plate structure may, for example, have a curved surface that curves (bends) according to the installation location. Also, although not shown, it may have a shape that includes both a planar portion and a curved portion. That is, the glass plate structure may have a three-dimensional shape having at least a portion thereof curved in a concave or convex shape. In this way, by forming a three-dimensional shape in accordance with the installation location, the appearance at the installation location can be improved, and the design can be enhanced.
  • the exciter 13 is connected to one main surface of the various glass plate structures described above via a connecting member 19, but a single plate region is provided in the laminated glass and this
  • the exciter 13 may be connected via a connection member 19 to the area of the veneer. That is, of the pair of glass plates 23 and 25 of the glass plate structure, the outer edge of one glass plate extends further outside than the other glass plate. Also, a suitable sealing material is provided at the end of one of the glass plates and the intermediate layer to seal the intermediate layer. Then, the exciter 13 is attached via the connection member 19 to the portion (single plate region) extending to the outside of one of the glass plates.
  • the glass diaphragm with an exciter described above can be applied to various uses.
  • the glass diaphragm of the glass diaphragm with an exciter may be a vehicle window glass.
  • FIG. 16 is a plan view of a vehicle in which the glass diaphragm with an exciter is applied to the window glass.
  • the vehicle window glass composed of the glass diaphragm may be the front side window FSW of the vehicle 83, but is not limited to this.
  • the rear side window RSW, windshield WS, rear window RW, roof glazing RG, front quarter window FQW, etc. of the vehicle 83 may be used.
  • the vehicle glazing may be a wind deflector used in convertibles.
  • the glass diaphragm may be glass for the interior of the vehicle.
  • interior glass include those provided in various interior materials such as dashboards, center consoles, ceilings, door trims, pillar lining panels, and sun visors.
  • Glass diaphragms can also be used as vehicle windows, building windows, structural members, and decorative panels with improved water repellency, anti-snow, anti-icing, and antifouling properties due to sonic vibration.
  • the glass diaphragm with the exciter may be a vehicle-mounted or machine-mounted speaker.
  • the glass diaphragm with an exciter is used, for example, as a member for electronic equipment, such as a full-range speaker, a speaker for bass reproduction in the 15 Hz to 200 Hz band, a large speaker with a diaphragm area of 0.2 m 2 or more, a flat speaker, a cylindrical speaker, and a transparent speaker.
  • cover glass for mobile devices that function as speakers, cover glass for TV displays, video screens, displays where video and audio signals are generated from the same surface, speakers for wearable displays, electronic displays, lighting fixtures, etc. can.
  • the speaker may be for music, alarm sound, or the like.
  • the glass diaphragm with an exciter may be configured as an active noise control diaphragm for noise reduction.
  • a vibration detection element it can function as a diaphragm for a microphone, a vibration sensor, or the like.
  • Test Example 1 is a test piece in which a convex portion is formed in the joint member and a concave portion is formed in the glass plate, and the convex portion and the concave portion are engaged with each other and adhered. was used as Test Example 2 (comparative example).
  • 17A is an exploded view of the test piece of Test Example 1
  • FIG. 17B is a cross-sectional view of the test piece of Test Example 1.
  • FIG. 18A is an exploded view of the test piece of Test Example 2
  • FIG. 18B is a cross-sectional view of the test piece of Test Example 2.
  • the glass plate and the joint member were put together to cure the adhesive.
  • a tensile tester Autograph AG-X, manufactured by Shimadzu Corporation was used to apply a test load of 5 kN in the compressive shear direction to the obtained test piece, and the presence or absence of delamination between the glass plate and the joint member was confirmed.
  • Test Example 2 the contact area between the glass plate and the bonding member by the adhesive was 4.0 ⁇ 10 ⁇ 4 m 2 , and the load stress when the test load was applied was 12.5 MPa, causing delamination. On the other hand, in Test Example 1, the contact area was 4.47 ⁇ 10 ⁇ 4 m 2 which was larger than that in Test Example 2, the load stress was 11.1 MPa which was smaller than that in Test Example 2, and no peeling occurred.
  • this specification discloses the following matters. (1) a glass plate structure having a concave portion that does not penetrate from one main surface of the glass plate in the thickness direction; a connecting member having a convex portion corresponding to the shape of the concave portion, the convex portion being inserted into the concave portion and attached to the glass plate structure; an adhesive layer disposed between the concave portion and the convex portion; A glass diaphragm with a According to this glass diaphragm, the projections of the connection member are inserted into the recesses of the glass plate structure, and joined by the adhesive layer in a mutually engaged state. Therefore, the connecting member and the glass plate structure can be firmly joined together, and even if the adhesive deteriorates over time, there will be no displacement, falling off, or the like.
  • connection member has a flange facing the one main surface of the glass plate structure;
  • the glass plate structure is a laminated glass having a first glass plate, a second glass plate, and an intermediate layer sandwiched between the first glass plate and the second glass plate, (1 ) or the glass diaphragm according to (2).
  • the intermediate layer is a fluid layer made of fluid such as liquid or liquid crystal or a gel layer
  • the loss factor of the glass plate can be increased, and resonance vibration can be damped.
  • connection member can be joined to the first glass plate by providing the through hole in the first glass plate.
  • the intermediate layer has adhesiveness;
  • connection member has a projection projecting from the main surface of the glass plate structure and has a threaded portion.
  • another member can be joined to the connecting member by screwing.
  • connection member-side through-hole passes through the center of gravity of the connecting member in plan view of the glass plate.
  • the through-holes on the connection side can be formed at once by stacking a plurality of connection members in the axial direction and punching them, so that efficient processing suitable for mass production can be stably performed.
  • connection member-side through hole a function corresponding to the cross-sectional shape according to the purpose.
  • the adhesive layer has a shear adhesive strength of 1.0 ⁇ 10 4 Pa or more and 3.0 ⁇ 10 7 Pa or less.
  • the adhesive layer has a shear adhesive strength suitable for bonding to the glass plate.
  • connection member has a circular shape when viewed in plan in the axial direction of the projection.
  • the connecting member since the connecting member has a circular shape in a plan view, it has a shape suitable for isotropic vibration propagation.
  • a method for manufacturing a glass diaphragm wherein a connecting member having a convex portion corresponding to the shape of the concave portion is attached to the glass plate structure by inserting the convex portion into the concave portion via an adhesive layer.
  • the projections of the connection member are inserted into the recesses of the glass plate structure, and joined by the adhesive layer in a mutually engaged state. Therefore, the connecting member and the glass plate structure can be firmly joined together, and even if the adhesive deteriorates over time, there will be no displacement, falling off, or the like.
  • the glass diaphragm according to any one of (1) to (17); an exciter fixed to the connection member; A glass diaphragm with an exciter.
  • the exciter can be detachably joined to the glass plate structure via the joining member, so that the exciter can be easily replaced and convenience can be improved.
  • a vehicle diaphragm wherein the glass diaphragm of the glass diaphragm with an exciter according to (19) is a vehicle window glass. According to this vehicle diaphragm, it is possible to generate a desired sound from the vehicle window glass while enhancing the bass reproduction capability.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Manufacturing & Machinery (AREA)
  • Joining Of Glass To Other Materials (AREA)
PCT/JP2022/038108 2021-10-15 2022-10-12 ガラス振動板、ガラス振動板の製造方法、エキサイタ付きガラス振動板、車両用振動板及び建築物用振動板 Ceased WO2023063370A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119418616A (zh) * 2025-01-06 2025-02-11 苏州清听声学科技有限公司 一种定向发声屏、显示设备及定向发声屏的制备工艺

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006180368A (ja) * 2004-12-24 2006-07-06 Fujitsu Ten Ltd 車両の内装板を振動板としたスピーカ装置
WO2018155518A1 (ja) * 2017-02-23 2018-08-30 Ａｇｃ株式会社 ガラス板構成体
WO2019172076A1 (ja) * 2018-03-06 2019-09-12 Ａｇｃ株式会社 スピーカー装置
JP2020188413A (ja) * 2019-05-16 2020-11-19 株式会社デンソーテン スピーカ装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006180368A (ja) * 2004-12-24 2006-07-06 Fujitsu Ten Ltd 車両の内装板を振動板としたスピーカ装置
WO2018155518A1 (ja) * 2017-02-23 2018-08-30 Ａｇｃ株式会社 ガラス板構成体
WO2019172076A1 (ja) * 2018-03-06 2019-09-12 Ａｇｃ株式会社 スピーカー装置
JP2020188413A (ja) * 2019-05-16 2020-11-19 株式会社デンソーテン スピーカ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119418616A (zh) * 2025-01-06 2025-02-11 苏州清听声学科技有限公司 一种定向发声屏、显示设备及定向发声屏的制备工艺

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