WO2023095735A1 - エキサイタ付き振動板及び車両用窓ガラス - Google Patents

エキサイタ付き振動板及び車両用窓ガラス Download PDF

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Publication number
WO2023095735A1
WO2023095735A1 PCT/JP2022/042917 JP2022042917W WO2023095735A1 WO 2023095735 A1 WO2023095735 A1 WO 2023095735A1 JP 2022042917 W JP2022042917 W JP 2022042917W WO 2023095735 A1 WO2023095735 A1 WO 2023095735A1
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WIPO (PCT)
Prior art keywords
exciter
diaphragm
glass plate
glass
vibration damping
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/JP2022/042917
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English (en)
French (fr)
Japanese (ja)
Inventor
順 秋山
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 JP2023563665A priority Critical patent/JPWO2023095735A1/ja
Priority to CN202280077513.5A priority patent/CN118285116A/zh
Priority to DE112022005575.8T priority patent/DE112022005575T5/de
Publication of WO2023095735A1 publication Critical patent/WO2023095735A1/ja
Priority to US18/671,055 priority patent/US20240314478A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • 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
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • 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
    • H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
    • 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2873—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/023—Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/05—Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Definitions

  • the present invention relates to a diaphragm with an exciter and a window glass for a vehicle. More particularly, it relates to an exciter-equipped diaphragm and a vehicle window glass that are excellent in sound pressure control.
  • Patent Document 1 discloses a speaker device that includes a diaphragm, an exciter, and a vibration transmission section, and in which the loss factor of the diaphragm and the specific elastic modulus of the vibration transmission section are within a certain range. More specifically, a configuration is disclosed in which the exciter is attached to the diaphragm via the vibration transmitting portion, and the rod holding member is adhesively fixed to the surface of the glass substrate. As a result, while maintaining the acoustic performance, excellent design can be exhibited without impairing the design of the diaphragm.
  • the vibration of the exciter when transmitted to a diaphragm made of glass or the like, the vibration of the exciter may cause a phenomenon called split vibration, in which the diaphragm vibrates separately from the exciter in a high frequency range.
  • split vibration in which the diaphragm vibrates separately from the exciter in a high frequency range.
  • the present disclosure provides a diaphragm with an exciter and a window glass for a vehicle that can suppress deterioration in sound quality due to fluctuations in sound pressure, especially in a high frequency range, when a glass plate with an exciter attached is used as a glass diaphragm.
  • a glass plate and an exciter attached to the main surface side of the glass plate and capable of vibrating the glass plate; a vibration damping portion positioned around the exciter in a plan view of the glass plate, surrounding at least a portion of the exciter, and attached to the main surface side;
  • the vibration damping portion is formed by laminating a vibration damping layer and a vibration damping material from the main surface side of the glass plate,
  • the exciter can provide an exciter-equipped diaphragm spaced apart from the damping section.
  • an exciter-equipped diaphragm and a vehicle window glass that are equipped with an exciter and are capable of suppressing deterioration in sound quality due to changes in sound pressure in a predetermined frequency range, particularly in a high frequency range.
  • FIG. 1 is a plan view showing an example of a diaphragm with an exciter according to a first embodiment
  • FIG. 2A is a plan view showing an example of a diaphragm with an exciter according to the first embodiment
  • FIG. 2B is a cross-sectional view showing an example of the diaphragm with an exciter according to the first embodiment
  • FIG. 3A is a cross-sectional view showing another example of the diaphragm with an exciter according to the first embodiment
  • FIG. 3B is a cross-sectional view showing another example of the diaphragm with an exciter according to the first embodiment
  • FIG. 3C is a cross-sectional view showing another example of the diaphragm with an exciter according to the first embodiment
  • FIG. 3D is a cross-sectional view showing another example of the diaphragm with an exciter according to the first embodiment
  • FIG. 3E is a cross-sectional view showing another example of the diaphragm with an exciter according to the first embodiment
  • 4A is a plan view showing another example of the diaphragm with an exciter according to the first embodiment
  • FIG. 4B is a cross-sectional view showing another example of the diaphragm with an exciter according to the first embodiment
  • FIG. 5A is a plan view showing another example of the diaphragm with an exciter according to the first embodiment
  • FIG. 5B is a cross-sectional view showing another example of the diaphragm with an exciter according to the first embodiment
  • FIG. FIG. 6A is a plan view showing an example of a diaphragm with an exciter according to a second embodiment
  • FIG. 6B is a cross-sectional view showing an example of the diaphragm with an exciter according to the second embodiment
  • FIG. 7 is a graph showing frequency characteristics of sound pressure in diaphragms with exciters of Examples and Comparative Examples.
  • FIG. 1 is a plan view showing an exciter-equipped diaphragm 100 according to the first embodiment.
  • the diaphragm with exciter 100 includes a glass plate 1, an exciter 11 attached to the main surface of the glass plate 1, and a control arranged around the exciter 11 in a plan view of the glass plate 1 (the XZ plane in FIG. 1). and a vibrating portion 21 .
  • the exciter-equipped diaphragm 100 according to the present embodiment is an example of a window member, and vibrates the glass plate 1 by driving (exciting) the exciter 11 to generate desired sound.
  • a glass plate 1 shown in FIG. 1 is an example of a window glass for a vehicle, and is a side glass (side window).
  • the exciter 11 When the exciter 11 is attached as the glass plate 1 to the main surface of the side glass for a vehicle, it is preferable to arrange it in a region below the beltline BL (negative Z-axis direction). In particular, when the side glass (glass plate 1) of the lifting mechanism (not shown) is arranged below the belt line BL, the exciter 11 is hidden by the door panel or the like, and the visibility of the opening region of the glass plate 1 is not hindered. preferable.
  • the glass plate may be a single glass plate consisting of one glass plate, or may be a laminated glass in which a pair of glass plates are sandwiched by resin or the like.
  • the diaphragm 100 with an exciter according to the present embodiment can be expected to improve the acoustic effect, so unless otherwise specified, the glass plate 1 will be described as a single plate glass.
  • the glass plate 1 can be applied not only to the side glass but also to various window glasses (window members) mounted on a vehicle, such as a rear glass, a windshield, a roof glass, a rear quarter glass, a front bench glass, and the like.
  • the position of the exciter 11 attached to the main surface of the glass plate 1 is not particularly limited, and if the glass plate 1 is a side glass having a lifting mechanism, it can be attached to any position below the beltline BL. Similarly, when the glass plate 1 is a side glass having an elevating mechanism, the damping portion 21 is also attached at a position surrounding the exciter 11 in a region below the beltline BL.
  • the number of exciters 11 attached to the glass plate 1 of the diaphragm 100 with exciters is not limited to one, and may be plural.
  • a plurality of damping portions 21 corresponding to each exciter 11 may be provided in accordance with the number of exciters 11, or a plurality of exciters adjacent to each other may be provided.
  • 11 may be provided, and the number of damping portions 21 may be less than the number of exciters 11 .
  • the exciter-equipped diaphragm 100 according to the present embodiment will be described as having one exciter 11 and one damping section 21 on the glass plate 1 .
  • the exciter 11 and the damping section 21 may be attached at any position.
  • the exciter 11 and the vibration damping portion 21 are arranged so that the transmission region of the glass plate 1 is narrowed and the appearance from the passenger is not deteriorated. may be attached to the periphery of the
  • the glass plate 1 is a vehicle window glass and a light shielding film (not shown) having a predetermined width is formed inside the edge, at least part of the exciter 11 and the damping section 21 If they are arranged so as to overlap with the light shielding film, they are less likely to be visually recognized by the occupant, and it is more preferable that they are all arranged so as to overlap with the light shielding film.
  • the light-shielding film is an opaque colored ceramic layer having a thickness of about 5 ⁇ m to 25 ⁇ m and may be of any color, preferably a dark color such as black, brown, gray or dark blue, or white, more preferably black.
  • the exciter 11 and the damping section 21 do not come into direct contact. That is, the vibration damping part 21 is arranged so as to have a predetermined gap (gap) with the exciter. In this manner, the vibration damping portion 21 is spaced apart from the exciter 11 and arranged so as to surround the exciter 11 , thereby transmitting the vibration generated from the exciter 11 to the glass plate 1 and generating the vibration in the glass plate 1 .
  • Split vibration can be suppressed, and acoustic reproducibility is improved.
  • a closed loop is constructed to surround the exciter 11 . Therefore, in this example, the center of gravity of the exciter 11 and the center of gravity of the vibration damping portion 21 coincide, and the outer edge of the exciter 11 and the inner and outer edges of the vibration damping portion 21 have a concentric relationship.
  • the inner edge and outer edge of the vibration damping portion 21 are not limited to a circular shape, and may be an arbitrary shape such as an elliptical shape or a polygonal shape.
  • the width of the damping portion 21 may be substantially the same as shown in FIG. 1, or may be partially different (in the ring). If the widths of the vibration damping portions 21 are substantially the same, it becomes easier to equalize the bias in the vibration damping level of the glass plate 1 around the exciter.
  • the cross-sectional shape (along the XY plane) substantially orthogonal to the extending direction of the damping portion 21 is not limited to a rectangular shape, and may be a trapezoidal shape, and can be set to any shape.
  • FIG. 2B is a cross-sectional view (in the XY plane) of diaphragm 101 with exciter shown in FIG.
  • the exciter 11 and the damping section 21 are arranged with a gap D without direct contact, as described above.
  • the distance D may be 0.2 mm or more, preferably 0.5 mm or more, more preferably 1.0 mm or more, and even more preferably 5.0 mm or more. If the distance D is less than 0.2 mm, at least one of the exciter 11 and the vibration damping section 21 may be displaced depending on the usage conditions, and they may come into contact with each other.
  • the upper limit of the distance D is not particularly limited, but may be 50 mm or less, preferably 40 mm or less, more preferably 30 mm or less, and even more preferably 20 mm or less.
  • the distance D is more than 50 mm, the area occupied by the vibration damping portion 21 and the exciter 11 on the main surface of the glass plate 1 will expand, which may cause problems such as a narrow transmission area. Further, if the distance D exceeds 50 mm, the weight of the damping portion 21 may increase more than necessary.
  • the damping part 21 is arranged on the same main surface as the main surface of the glass plate 1 on which the exciter 11 is provided, and is spaced apart by a distance D so as to surround at least a part of the exciter 11 .
  • the vibration damping portion 21 includes a configuration in which a vibration damping layer 31 and a vibration damping material 32 are laminated in this order from the main surface of the glass plate 1 .
  • the composition of the glass plate 1 constituting the diaphragm 101 with exciter is not particularly limited, soda lime glass, aluminosilicate glass, borosilicate glass, lead glass, alkali barium glass, aluminoborosilicate glass, etc. can be used. Further, when the glass plate 1 is used as a window glass for a vehicle, tempered glass is preferable because a predetermined strength can be obtained. Examples of tempered glass include air-cooled tempered glass and chemically tempered glass, and chemically tempered glass is preferable as thin tempered glass. When the glass plate 1 is chemically strengthened glass, the glass plate 1 may have a composition capable of being strengthened by molding and chemical strengthening treatment.
  • the plate thickness of the glass plate 1 is not particularly limited. 1.5 mm or more is more preferable. Moreover, when the glass plate 1 is a single plate glass, the plate thickness may be 5.0 mm or less, preferably 4.0 mm or less, and more preferably 3.0 mm or less, from the viewpoint of weight reduction.
  • the glass plate 1 may be curved glass having a predetermined curvature, or may be planar (non-curved). Further, when the glass plate 1 is a window glass for a vehicle, it may have a single-curved shape curved in one of the vertical and horizontal directions (with respect to one side of the frame) when attached to the vehicle. and may have a compound curved shape curved both in the horizontal direction.
  • the single-curved shape may be a shape curved in only one arbitrary direction, and the compound-curved shape may be a shape curved in two or more arbitrary different directions.
  • the minimum value of the curvature radius is preferably 500 mm or more and 100,000 mm or less.
  • the glass plate 1 may be colored. This is useful when the glass plate 1 has a design and functions such as IR cut, UV cut, and privacy glass.
  • the exciter 11 includes a coil section electrically connected to an external device, a magnetic circuit section, and an excitation section coupled to the coil section or the magnetic circuit section.
  • an electrical signal of sound (sound pressure) from an external device is input to the coil section, the interaction between the coil section and the magnetic circuit section causes vibration in the coil section or the magnetic circuit section.
  • the vibration of the coil portion or the magnetic circuit portion is transmitted to the vibrating portion, and the vibration is transmitted to the glass plate 1 from the vibrating portion.
  • Various specifications can be used for the exciter 11. In particular, it is preferable in terms of space saving that the portion protruding from the main surface of the glass plate 1 is small and the height is low so that the height can be reduced.
  • the height of the exciter 11 varies depending on the type of the glass plate 1 to be attached and the specifications of the frequency region to be vibrated, and the height can be appropriately selected.
  • thermosetting adhesive a photocurable adhesive
  • moisture-curable adhesive a moisture-curable adhesive
  • two-liquid mixed adhesive a two-liquid mixed adhesive
  • thermosetting adhesives 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.
  • photo-curing adhesive the bonding work time can be shortened because it can be instantly bonded by irradiating ultraviolet rays.
  • the material of the adhesive layer 12 is preferably, for example, a group of materials that are bonded by thermally plasticizing a film material, such as polyvinyl butyral resin (PVB), ethylene/vinyl acetate copolymer resin (EVA), urethane, and the like.
  • PVB polyvinyl butyral resin
  • EVA ethylene/vinyl acetate copolymer resin
  • urethane urethane
  • the adhesive layer 12 is made of a material with 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 the glass plate 1. preferable. Therefore, the Young's modulus of the adhesive layer 12 is preferably 0.01 MPa or more and 100 MPa or less.
  • the thickness of the adhesive layer 12 is preferably 1.0 ⁇ m or more, more preferably 20 ⁇ m or more, and even more preferably 50 ⁇ m or more. Also, the thickness of the adhesive layer 12 is preferably 3.0 mm or less, more preferably 2.0 mm or less, and even more preferably 1.5 mm or less. When the adhesive layer 12 is within the above range, necessary and sufficient bonding strength can be obtained while maintaining parallelism with the main surface of the glass plate 1 after bonding.
  • the vibration damping layer 31 is a layer that connects the glass plate 1 and the damping material 32 . If the vibration damping layer 31 is made of a material having a cushioning property, it can suppress the split vibration of the glass plate 1 with respect to the vibration generated from the exciter 11 .
  • the vibration damping layer 31 may be made of a material having a loss coefficient ⁇ measured at 25° C. of 1.0 ⁇ 10 ⁇ 2 or more. Note that the loss factor ⁇ is obtained by a test method according to JIS K 7391:2008.
  • the loss coefficient ⁇ of the vibration damping layer 31 measured at 25° C. is preferably 2.0 ⁇ 10 ⁇ 2 or more, more preferably 5.0 ⁇ 10 ⁇ 2 or more.
  • the vibration damping layer 31 may satisfy the loss coefficient ⁇ under the above conditions, and specific examples thereof include rubber-based materials and resin materials.
  • the vibration damping layer 31 may have adhesiveness in order to fix the damping material 32 to the glass plate 1, and it is preferable to use an adhesive such as double-sided tape.
  • adhesives include acrylic adhesives, silicone adhesives, urethane adhesives, and rubber adhesives.
  • the double-sided tape may be provided with the same adhesive or different adhesives as an adhesive layer on one side of a base layer such as a resin and an adhesive layer on the other side.
  • the vibration damping layer 31 is not limited to the structure containing the above-described adhesive. For example, if the vibration damping layer 31 satisfies the loss coefficient ⁇ measured at 25° C. under the above conditions, the vibration damping layer 31 may include a liquid layer and have a structure in which the periphery of the liquid layer is sealed with resin or the like. .
  • the thickness of the vibration damping layer 31 can be appropriately selected within the range of 0.05 mm to 5.0 mm. If the thickness of the vibration damping layer 31 is less than 0.05 mm, the desired vibration damping performance may not be achieved. Further, if the thickness of the vibration damping layer 31 exceeds 5.0 mm, it is necessary to reduce the thickness of the damping material 32 laminated on the vibration damping layer 31, and the height of the damping portion 21 is reduced. become difficult.
  • the thickness of the vibration damping layer 31 is preferably 0.1 mm or more, more preferably 0.3 mm or more. Also, the thickness of the vibration damping layer 31 is preferably 4.0 mm or less, more preferably 3.0 mm or less.
  • the damping material 32 is laminated on the surface of the vibration damping layer 31 opposite to the glass plate 1 .
  • the damping material 32 may be a single layer or a laminated body in which a plurality of layers are laminated.
  • the damping material 32 may be a material having a specific gravity (based on water) of 1.0 or more in order to suppress split vibration of the glass plate 1 due to vibration generated from the exciter 11 .
  • the specific gravity of the damping material 32 is preferably 1.1 or more, more preferably 1.5 or more, and even more preferably 2.0 or more.
  • the desired vibration damping section 21 can be obtained. Since the weight required for producing the effect can be satisfied, it becomes easier to save space.
  • the upper limit of the specific gravity of the damping material 32 is not particularly limited, but may be, for example, 20 or less, 15 or less, or 12 or less.
  • the thickness of the damping material 32 is not particularly limited as it varies depending on the specific gravity of the material used. In particular, if the thickness (height) of the vibration damping portion 21 is equal to or less than the total thickness (height) of the adhesive layer 12 and the exciter 11, the portion that protrudes in the thickness direction of the glass plate 1 has a low profile. can be changed and is preferable. When the total height of the adhesive layer 12 and the exciter 11 is 100%, the height of the damping portion 21 may be 100% or less, preferably 95% or less, more preferably 90% or less, and 80%. % or less is more preferable.
  • the material of the damping material 32 is not particularly limited as long as it has a specific gravity of 1.0 or more as described above, and resin, metal, glass, ceramics, etc. can be used. Among these, from the viewpoint of ease of handling such as strength, rigidity and workability, it is preferable to use a resin, and in particular, an ABS resin (specific gravity: 1.0 to 1.1) can be preferably used, but it is not limited to this. .
  • the width of the damping material 32 in plan view of the glass plate 1 is the same as the width of the vibration damping layer 31, but may be different.
  • the width of the damping material 32 may be wider than the width of the damping layer 31 as long as the damping layer 31 can firmly bond the glass plate 1 and the damping material 32 together.
  • the damping material 32 has a rectangular cross section, but the outer edge of the cross section may be tapered.
  • the cross-sectional shape of the damping material 32 may be a trapezoid whose width gradually increases in the direction away from the main surface of the glass plate 1, or may be any shape other than the trapezoid.
  • the portion where the exciter 11 contacts the glass plate 1 is SE , and the portion where the damping portion 21 contacts the glass plate 1.
  • the area of the vibration damping layer 31 is defined as SA .
  • S 2 E at this time is 100%, S 2 A may be 80% to 500%, preferably 90% to 400%, more preferably 100% to 300%. If the SA is less than 80%, the member may easily separate due to vibration.
  • FIG. 3A to 3E are plan views showing exciter-equipped diaphragms 102 to 106 according to the present embodiment, each having an exciter 11 having a circular outer edge.
  • Diaphragm 102 with an exciter shown in FIG. 3A has a structure in which vibration damping section 22 that is an open loop having two notches surrounds exciter 11 with a certain interval (D).
  • the damping portion 22 is divided into two portions (first damping portion 22a and second damping portion 22b) by two notches.
  • the two notched portions of the diaphragm with exciter 102 both extend in the X-axis direction, and the first vibration damping portion 22a and the second vibration damping portion 22b pass through the center of gravity of the exciter 11 with respect to the X-axis. It is line symmetrical. In other words, the damping portion 22 is symmetrical with respect to the center of gravity of the exciter 11 .
  • the notch may be provided at only one location, and even if there are two notches, the first damping portion 22a and the second damping portion 22b are asymmetrical in plan view of the glass plate 1. You may provide in the position used as the shape which becomes.
  • the diaphragm 103 with an exciter shown in FIG. 3B has a configuration in which the vibration damping section 23, which is an open loop having four notches, surrounds the exciter 11 with a certain interval (D).
  • the damping portion 23 is divided into four portions (first damping portion 23a, second damping portion 23b, third damping portion 23c, and fourth damping portion 23d) by four notches.
  • the damping portion 23 is symmetrical with respect to the center of gravity of the exciter 11 . Note that even when the cutout portions are provided at four locations, they may be provided at positions where the vibration damping portions 23 (four portions) have an asymmetrical shape in plan view of the glass plate 1 .
  • a diaphragm 104 with an exciter shown in FIG. 3C differs from the diaphragm 101 with an exciter shown in FIG.
  • the vibration damping portion 24 has a closed loop with rectangular (square) inner and outer edges in plan view of the glass plate 1 , and the center of gravity of the vibration damping portion 24 coincides with the center of gravity of the exciter 11 . Note that the distance D between the exciter 11 and the damping portion is not constant, but may be within the range described above.
  • the vibration plate 105 with an exciter shown in FIG. 3D has a structure in which the vibration damping portion 25 that is an open loop having two notches surrounds the exciter 11 in contrast to the vibration plate 104 with an exciter shown in FIG. 3C.
  • the damping portion 25 is divided into two portions (first damping portion 25a and second damping portion 25b) by two notches.
  • the two cutout portions of the diaphragm with exciter 105 both extend in the X-axis direction, and the first damping portion 25a and the second damping portion 25b are positioned along the X-axis through the center of gravity of the exciter 11. It is line symmetrical.
  • the damping portion 22 is symmetrical with respect to the center of gravity of the exciter 11 .
  • the notch may be provided at only one location, and even if there are two notches, the first damping portion 25a and the second damping portion 25b are asymmetrical in plan view of the glass plate 1. You may provide in the position used as the shape which becomes.
  • the diaphragm 106 with an exciter shown in FIG. It is divided into four parts (first damping portion 26a, second damping portion 26b, third damping portion 26c, and fourth damping portion 26d).
  • the damping portion 26 in the diaphragm 106 with exciter is line-symmetrical with respect to the X-axis and the Y-axis passing through the center of gravity of the exciter 11 .
  • the damping portion 26 is symmetrical with respect to the center of gravity of the exciter 11 .
  • the vibration damping section 21 to the vibration damping section 26 are formed as a closed loop surrounding the exciter 11 or an open loop surrounding at least a portion of the exciter 11 with a notch.
  • the vibration damping portions vibration damping portions 22, 23, 25 and 26
  • the circumferential length of the vibration damping portion in a shape without a notch is When it is 100%, the (total) length of the damping portion excluding the notch portion may be 50% or more, preferably 80% or more, and more preferably 90% or more.
  • the peripheral length of the vibration damping portion is defined by the length along the center of the width of the vibration damping portion.
  • FIG. 4B is a cross-sectional view (XY plane) along the dashed line IV--IV passing through the center of gravity of the exciter 13 for the diaphragm 107 with exciter shown in FIG. 4A.
  • the exciter-equipped diaphragm 107 shown in FIG. 4B differs from the exciter-equipped diaphragm 101 in that the exciter 13 has a T shape in a cross-sectional view (side view).
  • the portion that becomes the flange portion 13a of the exciter 13 overlaps the entire vibration damping portion 21, but the vibration damping portion 21 may overlap with part of
  • the distance (gap) in the thickness direction (Y-axis direction) of the glass plate 1 should be 0.2 mm or more so that the flange portion 13a of the exciter 13 and the damping portion 21 do not come into contact with each other due to vibration of the exciter 13 or the like.
  • 0.5 mm or more is preferable, and 1.0 mm or more is more preferable.
  • FIG. 5B is a cross-sectional view (in the XY plane) of the exciter-equipped diaphragm 108 shown in FIG.
  • the exciter-equipped diaphragm 108 shown in FIG. 5B differs from the exciter-equipped diaphragm 107 in that the exciter 14 has an inverted L shape in a cross-sectional view (side view).
  • the part where the exciter 14 becomes the inverted L-shaped collar part 14 a overlaps a part of the damping part 21 .
  • the interval (gap) in the thickness direction (Y-axis direction) of the glass plate 1 can be applied to the range between the T-shaped exciter 13 and the collar portion 13a.
  • FIG. 6A is a plan view showing an exciter-equipped diaphragm 109 according to the second embodiment
  • FIG. 6B is a cross-sectional view (XY plane) along the line VI-VI passing through the center of gravity of the exciter 15.
  • a diaphragm 109 with an exciter shown in FIGS. 6A and 6B differs from the first embodiment in that an adhesive layer 50 and a mount section 60 are provided between the glass plate 1, the damping section 21 and the exciter 15.
  • the mount section 60 has a base section 61 in contact with the adhesive layer 50 and a (cylindrical) screw section 62 protruding from the base section 61 .
  • the vibration damping portion 21 is mounted on the base portion 61
  • the exciter 15 has a concave portion serving as a female screw portion in the center, and is engaged with the screw portion 62 corresponding to the male screw portion, and is tightened to the mount portion 60 .
  • Fixed Note that the same material as the adhesive layer 12 can be applied to the adhesive layer 50, so the description is omitted here.
  • the mounting portion 60 may have a structure in which it is mechanically attached to the glass plate 1 instead of being fixed by the adhesive layer 50 .
  • the mount part 60 may have a structure in which the glass plate 1 is provided with unevenness, a through hole, or the like and provided with a mechanism such as a meshing mechanism so as to be mechanically fixed.
  • a jig (not shown) that connects and sandwiches the glass plate 1 may be used to have a structure that can mechanically fix the glass plate 1 itself without processing such as cutting.
  • the mount portion 60 can be made of one or a plurality of materials selected from metal materials such as aluminum or aluminum alloys, stainless steel, ceramics, glass, resin materials, fiber composite materials, and the like.
  • the resin material include acrylic resins such as polymethyl methacrylate resin (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), urethane, polypropylene (PP), ABS resin, etc., and are excellent in moldability.
  • PMMA polymethyl methacrylate resin
  • PC polycarbonate
  • PVC polyvinyl chloride
  • PP polypropylene
  • ABS resin etc.
  • connection between the mount portion 60 and the exciter 15 is not limited to a single screw structure as shown in FIG. 6B, and multiple screw structures and various connection structures can be applied.
  • the mount part 60 may be composed of only the base part 61 and may be joined to the exciter 15 with an adhesive, using a plug-in connection such as a screw or taper fitting, a caulking connection using a rivet or the like, or using a clamp.
  • a mechanical joining structure such as connection may also be used.
  • Example 1 In Example 1, the diaphragm 101 with an exciter shown in FIGS. 2A and 2B was manufactured. The dimensions and the like of the diaphragm with exciter 101 are as follows.
  • Vibration damping layer 31 An annular shape with an inner diameter of 25 mm, an outer diameter of 45 mm, and a thickness of 0.5 mm Loss factor ⁇ measured at 25°C 6 ⁇ 10 -1 (3M Company: VHBTM F9460)
  • Vibration damping material 32 Ring-shaped ABS resin (specific gravity 1.0) with an inner diameter of 25 mm, an outer diameter of 45 mm, and a thickness of 9 mm
  • An exciter 11 was attached to the central portion of the main surface of the glass plate 1 via an adhesive layer 12, and an annular damping portion 21 (a laminate of a vibration damping layer 31 and a damping material 32) was arranged around the exciter. At this time, the center of gravity of the exciter 11 and the center of gravity of the damping portion 21 were aligned, and the distance D in plan view of the glass plate 1 was set to 1.5 mm.
  • FIG. 7 is a graph showing changes in sound pressure (unit: dB) with respect to drive frequency at this time, and the solid line in FIG.
  • Comparative example 1 In Comparative Example 1, an exciter-equipped diaphragm 101 of Example 1 was produced by removing only the vibration damping portion 21 (the laminate of the vibration damping layer 31 and the vibration damping material 32). Also in Comparative Example 1, changes in sound pressure with respect to drive frequency were analyzed under the same conditions for the manufactured diaphragm with an exciter. The dashed line in FIG. 7 indicates the sound pressure characteristics of Comparative Example 1.
  • Example 1 provided with the damping section 21 As shown in the graph of FIG. 7, it was confirmed that in the entire drive frequency band from 1 kHz to 16 kHz, the sound pressure fluctuation in Example 1 provided with the damping section 21 was smaller than that in Comparative Example 1. In particular, among the above frequency bands, suppression of sound pressure fluctuations in Example 1 was conspicuous in a high driving frequency band of 5 kHz or more. As a result, in Example 1 provided with the damping section 21, the sound quality was improved as compared with Comparative Example 1, and a remarkable improvement effect was confirmed especially in the high frequency band.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Vibration Prevention Devices (AREA)
PCT/JP2022/042917 2021-11-24 2022-11-18 エキサイタ付き振動板及び車両用窓ガラス Ceased WO2023095735A1 (ja)

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JP2023563665A JPWO2023095735A1 (https=) 2021-11-24 2022-11-18
CN202280077513.5A CN118285116A (zh) 2021-11-24 2022-11-18 带激励器振动板以及车辆用窗玻璃
DE112022005575.8T DE112022005575T5 (de) 2021-11-24 2022-11-18 Membran mit erreger und fahrzeugfensterglas
US18/671,055 US20240314478A1 (en) 2021-11-24 2024-05-22 Diaphragm with exciter, and vehicle window glass

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006115167A (ja) * 2004-10-14 2006-04-27 Fujitsu Ten Ltd 車両の内装板を振動板としたスピーカ装置
JP2017530631A (ja) * 2014-09-19 2017-10-12 コーニング インコーポレイテッド 薄型パネルラウドスピーカ
WO2018123310A1 (ja) * 2016-12-27 2018-07-05 ソニー株式会社 フラットパネルスピーカおよび表示装置
WO2021060214A1 (ja) * 2019-09-27 2021-04-01 Ａｇｃ株式会社 振動装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7314928B2 (ja) 2018-03-06 2023-07-26 Ａｇｃ株式会社 スピーカー装置
JP6927368B1 (ja) 2020-06-05 2021-08-25 株式会社明電舎 電界放射装置，電界放射方法，位置決め固定方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006115167A (ja) * 2004-10-14 2006-04-27 Fujitsu Ten Ltd 車両の内装板を振動板としたスピーカ装置
JP2017530631A (ja) * 2014-09-19 2017-10-12 コーニング インコーポレイテッド 薄型パネルラウドスピーカ
WO2018123310A1 (ja) * 2016-12-27 2018-07-05 ソニー株式会社 フラットパネルスピーカおよび表示装置
WO2021060214A1 (ja) * 2019-09-27 2021-04-01 Ａｇｃ株式会社 振動装置

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US20240314478A1 (en) 2024-09-19
CN118285116A (zh) 2024-07-02

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