WO2015064121A1 - スピーカ及びスピーカ用筐体 - Google Patents

スピーカ及びスピーカ用筐体 Download PDF

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Publication number
WO2015064121A1
WO2015064121A1 PCT/JP2014/056247 JP2014056247W WO2015064121A1 WO 2015064121 A1 WO2015064121 A1 WO 2015064121A1 JP 2014056247 W JP2014056247 W JP 2014056247W WO 2015064121 A1 WO2015064121 A1 WO 2015064121A1
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WO
WIPO (PCT)
Prior art keywords
wall portion
speaker
wall
speaker unit
space
Prior art date
Application number
PCT/JP2014/056247
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
邦生 初本
和広 湯口
Original Assignee
サーモス株式会社
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 サーモス株式会社 filed Critical サーモス株式会社
Priority to KR1020157020527A priority Critical patent/KR20150097806A/ko
Priority to JP2014552994A priority patent/JP5715313B1/ja
Priority to CN201480006805.5A priority patent/CN104969567B/zh
Priority to SG11201505760RA priority patent/SG11201505760RA/en
Publication of WO2015064121A1 publication Critical patent/WO2015064121A1/ja
Priority to PH12015501610A priority patent/PH12015501610B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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
    • H04R1/2884—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure
    • H04R1/2888—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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; DEAF-AID SETS; 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
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers

Definitions

  • the present invention relates to a speaker having a double wall structure and a speaker housing applied to the speaker.
  • a speaker includes a speaker unit that oscillates air according to an input electric signal and emits a sound wave (hereinafter referred to as “forward wave”) forward, and a housing that supports the speaker unit.
  • the housing is disposed behind the speaker unit in order to prevent an unnecessary sound wave (hereinafter referred to as “rear wave”) having an opposite phase to the forward wave radiated behind the speaker unit from interfering with the forward wave. It is shaped to shield the space.
  • a back wave radiated from the rear of the speaker unit vibrates due to pressure fluctuation in the space inside the housing, and is further excited by vibration in the space, so that the wall surface of the housing is Vibrate. Then, when the wall surface of the housing vibrates, the air outside the housing vibrates and the sound wave propagates outside the housing. When propagation of sound waves through such a case occurs, a sound wave radiated from the case to the outside interferes with a forward wave radiated in front of the speaker unit.
  • Patent Documents 1 and 2 the propagation of sound waves through the housing is provided by providing a vacuum sealed space for suppressing the propagation of vibration between the inner wall portion and the outer wall portion of the housing having a double wall structure.
  • a speaker that suppresses noise. These speakers can suppress the propagation of sound waves through the casing without significantly increasing the weight of the casing.
  • the double-walled housing has vibration that propagates to the outer wall portion without passing through the sealed space.
  • the vibration of the inner wall portion excited by the backward wave propagates from the inner wall portion to the outer wall portion through the connecting portion between the inner wall portion and the outer wall portion (hereinafter referred to as “wraparound propagation vibration”), This vibration is directly propagated from the speaker unit to the housing through the contact portion between the speaker unit and the housing (hereinafter referred to as “direct propagation vibration”), and the outer wall portion vibrates due to these vibrations. .
  • vibrations propagating along the inner wall and outer wall of the double wall structure include longitudinal waves (dense waves) that are parallel to the propagation direction and vibrations that are perpendicular to the propagation direction.
  • longitudinal waves are parallel to the propagation direction
  • vibrations that are perpendicular to the propagation direction There is a certain shear wave.
  • the longitudinal wave is a vibration that is parallel to the wall surface, and it is difficult to vibrate the air around the wall surface.
  • the transverse wave is a vibration that is perpendicular to the wall surface, and is a major cause of generating sound waves outside the housing by vibrating the air around the wall surface.
  • the speaker proposed in Patent Document 1 suppresses vibration propagating to the outer wall portion by providing an elastic body for absorbing vibration on the vibration propagation path from the speaker unit to the outer wall portion. Yes.
  • this speaker since it is necessary to provide an elastic body at the joint between the outer wall portion and the inner wall portion in order to suppress the swaying propagation vibration, there is a high risk of breaking the vacuum in the sealed space due to impact or deterioration over time. (Refer to FIG. 2 of Patent Document 1).
  • an object of the present invention is to provide a speaker and a speaker housing that suppresses propagation of sound waves through the housing by suppressing both sneak propagation vibration and direct propagation vibration with a simple structure. To do.
  • the present invention provides a speaker having the following characteristics.
  • the present invention is a speaker including a speaker unit and a housing, wherein the housing has an inner wall portion that is partially open and has a space inside, and a space that is partially open and that is located inside. And an outer wall portion on which the inner wall portion is disposed, and the opened end portions of the inner wall portion and the outer wall portion are integrated to form a peripheral edge portion between the inner wall portion and the outer wall portion.
  • the speaker is characterized in that it is supported in contact with the inner wall.
  • the speaker unit contacts the inner wall portion in a direction having a directional component parallel to the opening surface. That is, the speaker unit contacts the inner wall portion in a direction having a direction component perpendicular to the inner wall portion. Therefore, it is possible to provide a region in the inner wall portion where the impedance is large with respect to the direction having the direction component perpendicular to the inner wall portion and the transverse wave is difficult to propagate toward the outer wall portion. Therefore, by being excited by the backward wave of the speaker unit, it is possible to suppress the sneak propagation vibration that is mainly a transverse wave.
  • the main vibration direction of the speaker unit (that is, the direction of radiating forward waves) is a direction perpendicular to the opening surface. Furthermore, the vibration in the direction perpendicular to the inner wall (that is, the transverse wave) easily propagates to the inner wall because the impedance of the inner wall is relatively small, and the vibration in the direction parallel to the inner wall (that is, the longitudinal wave) is Since the impedance of the inner wall portion is relatively large, it is difficult to propagate to the inner wall portion.
  • the main vibration direction of the speaker unit approaches a direction parallel to the inner wall portion.
  • the directly propagating vibration propagating from the speaker unit to the inner wall portion mainly becomes a longitudinal wave.
  • the longitudinal wave hardly propagates to the inner wall portion as described above, the directly propagating vibration can be reduced. Therefore, direct propagation vibration can be suppressed.
  • the speaker unit is supported in contact with the inner wall portion in a space inside the inner wall portion and spaced from the peripheral portion, It is preferable that the shape of the section in a cross section perpendicular to the opening surface is V-shaped.
  • the peripheral portion has a shape that bends sharply, so that it is difficult for vibration to pass through the peripheral portion. Therefore, it becomes possible to suppress sneak propagation vibration and direct propagation vibration.
  • the peripheral portion is the frontmost end of the housing. And from a viewpoint of suppressing the passage of vibration, it is preferable that the peripheral portion has a shape that bends into a V shape at an acute angle.
  • the present invention also provides a speaker having the following characteristics.
  • the present invention is a speaker including a speaker unit and a housing, wherein the housing has an inner wall portion that is partially open and has a space inside, and a space that is partially open and that is located inside. And an outer wall portion on which the inner wall portion is disposed, and the opened end portions of the inner wall portion and the outer wall portion are integrated to form a peripheral edge portion between the inner wall portion and the outer wall portion.
  • the speaker is characterized in that a shape of the peripheral portion in a cross section perpendicular to the opening surface having the peripheral portion as an outer periphery is V-shaped.
  • the speaker unit is supported in contact with the inner wall portion in a direction having a directional component parallel to the opening surface in a space inside the inner wall portion. It is preferable.
  • the shape of the peripheral portion in a cross section perpendicular to the opening surface is a V-shape that protrudes outside the space surrounded by the inner wall portion and the outer wall portion. If there is, it is preferable.
  • the shape of the peripheral portion in a cross section perpendicular to the opening surface is a V-shape bent only once.
  • the shape of the peripheral portion in a cross section perpendicular to the opening surface is a V shape bent at an angle smaller than 70 °.
  • the speaker unit includes a diaphragm, a drive unit that drives and vibrates the diaphragm according to an input electric signal, and a unit support unit that supports at least the drive unit.
  • the unit support portion may be supported in contact with the inner wall portion.
  • the speaker when the direction from the opening surface toward the space inside the inner wall portion is the rear and the opposite direction to the rear is the front, at least a part of the unit support portion is the vibration. It is preferable that the plate is supported by being in contact with the inner wall portion at a position behind the front end portion of the plate.
  • the distance between the contact position of the unit support portion and the inner wall portion and the peripheral portion can be increased. Therefore, it becomes possible to effectively suppress the sneak propagation vibration by increasing the distance for attenuating the sneak propagation vibration.
  • the front end of the speaker unit is the You may be located ahead of the peripheral part.
  • the outer edge of the speaker unit extends to the front of the peripheral edge and is separated from the peripheral edge.
  • At least a part of the speaker unit is located in a space inside the inner wall portion and has a direction component parallel to the opening surface with respect to the inner wall portion. It is preferable that it is supported in contact in a pressed state.
  • the speaker unit when the speaker unit is fixed to the inner wall portion, it is only necessary to fix the outer surface and inner wall portion of the facing speaker unit. Therefore, the speaker unit can be easily fixed to the inner wall portion.
  • a cross-sectional shape parallel to the opening surface of a portion of the speaker unit inserted into the space inside the inner wall portion is formed from the space inside the inner wall portion to the opening surface. It is preferable that it gradually increases as it goes.
  • the speaker unit when the speaker unit is inserted into the space inside the inner wall portion, the speaker unit is pressed against the inner wall portion along a direction having a directional component parallel to the opening surface, thereby contacting the inner wall portion. Stress along the direction is applied. Therefore, it becomes possible to effectively suppress the sneak propagation vibration.
  • the inner wall portion may have a bottomed cylindrical shape, and the axis of the inner wall portion may pass through the opening surface.
  • the inner wall portion is provided with a stepped portion projecting into the inner space, and the end portion of the speaker unit inserted into the inner space of the inner wall portion, It is preferable that the speaker unit is supported by the inner wall portion in a state of being in contact with the stepped portion.
  • the position of the speaker unit in the space inside the inner wall can be easily determined.
  • the pressure in the sealed space between the inner wall portion and the outer wall portion is lower than the atmospheric pressure.
  • the speaker unit is supported by being screwed into the inner wall portion.
  • this speaker it is possible to make the speaker unit detachable from the housing. Therefore, it becomes possible for the user to selectively combine desired ones from various speaker units and cases having different characteristics, and obtain a speaker having characteristics that match his / her preference.
  • the housing it is possible to arbitrarily adjust the support state of the speaker unit by the housing. For example, by increasing the screwing amount of the speaker unit, the volume (air volume) of the space behind the speaker unit and surrounded by the inner wall portion can be reduced, or the screwing amount of the speaker unit can be reduced. Thus, the volume of the space can be increased. And by performing such adjustment, it becomes possible to change the resonance state of the speaker unit.
  • an outer diameter of a screw thread screwed into the inner wall portion of the speaker unit is gradually increased from a space inside the inner wall portion toward the opening surface.
  • the speaker unit is pressed against the inner wall as the speaker unit is screwed. That is, as the speaker unit is screwed, stress along the direction having a direction component perpendicular to the inner wall is applied to the inner wall. Therefore, it is possible to effectively suppress the sneak propagation vibration.
  • a stepped portion that protrudes into the inner space is provided on the inner wall portion, a screw thread that is provided on the speaker unit and is screwed to the inner wall portion, and the inner wall Each of which is provided with a flank inclined with respect to a plane perpendicular to the screwing direction, and is inserted into the space inside the inner wall portion. Further, it is preferable that the speaker unit is supported by the inner wall portion in a state where the end portion of the speaker unit is in contact with the stepped portion.
  • the fastening direction from the stepped portion to the speaker unit is opposite to the fastening direction (parallel to the screwing direction).
  • Stress in a direction from the space inside the inner wall portion toward the opening surface is applied.
  • a stress in a direction perpendicular to the flank is applied from the thread flank on the speaker unit side to the thread flank on the inner wall side in contact with the flank.
  • the flank of the thread on the inner wall side is inclined with respect to a plane perpendicular to the screwing direction (that is, a plane perpendicular to the inner wall), the stress is a directional component perpendicular to the inner wall. (Direction component that presses the inner wall portion outward). Therefore, it is possible to effectively suppress the sneak propagation vibration.
  • the present invention also provides a speaker housing having the following characteristics.
  • the present invention includes an inner wall portion that is partially open and has a space inside, and an outer wall portion that is partially open and in which the inner wall portion is disposed in the space, and the inner wall portion
  • Each of the open end portions of the outer wall portion is integrated to form a peripheral portion, and a space between the inner wall portion and the outer wall portion forms a sealed space, and at least a part of the speaker unit is formed.
  • a speaker housing is provided.
  • the present invention also provides a speaker housing having the following characteristics.
  • the present invention includes an inner wall portion that is partially open and has a space inside, and an outer wall portion that is partially open and in which the inner wall portion is disposed in the space, and the inner wall portion
  • Each of the open end portions of the outer wall portion is integrated to form a peripheral portion, and a space between the inner wall portion and the outer wall portion forms a sealed space, and at least a part of the speaker unit is formed.
  • a support structure for contacting and supporting the inner wall portion in a space inside the inner wall portion and spaced from the peripheral edge portion is provided on the inner wall portion;
  • a speaker housing characterized in that a shape in a cross section perpendicular to an opening surface having a peripheral edge as an outer periphery is V-shaped.
  • both the sneak propagation vibration and the direct propagation vibration are suppressed with a simple structure in which the speaker unit is supported in contact with the inner wall portion. This makes it possible to suppress the propagation of sound waves through the housing.
  • FIG. 1 is a schematic perspective view of a speaker according to an embodiment of the present invention.
  • Sectional drawing which shows the AA cross section of FIG.
  • the disassembled perspective view of the speaker of FIG. Sectional drawing shown about 1st Example of the speaker which concerns on embodiment of this invention.
  • Sectional drawing shown about 2nd Example of the speaker which concerns on embodiment of this invention.
  • Sectional drawing shown about 3rd Example of the speaker which concerns on embodiment of this invention.
  • the side view shown about the shape of each sample.
  • the graph shown about the measurement result of the vibration in the sample V.
  • FIG. The graph shown about the measurement result of the vibration in the sample U.
  • FIG. The graph shown about the result of the vibration in the sample C.
  • FIG. 10 is a graph showing the degree of attenuation of each sample (plate thickness: 0.5 mm) shown in FIG. 9.
  • 10 is a graph showing the degree of attenuation of each sample (plate thickness: 1.0 mm) shown in FIG. 9.
  • the side view shown about the shape of each sample. 18 is a graph showing the degree of attenuation of each sample (plate thickness: 0.5 mm) shown in FIG. 18 is a graph showing the degree of attenuation of each sample (plate thickness: 1.0 mm) shown in FIG. Sectional drawing shown about 5th Example of the speaker which concerns on embodiment of this invention.
  • FIG. 29 is a cross-sectional view of a speaker housing manufactured by the manufacturing method shown in FIGS.
  • FIG. 1 is a schematic perspective view of a speaker according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing the AA cross section of FIG.
  • FIG. 3 is an exploded perspective view of the speaker of FIG.
  • the speaker 1 includes a speaker unit 10 and a housing 20.
  • the speaker unit 10 emits sound waves by vibrating air in accordance with an input electric signal.
  • the housing 20 supports the speaker unit 10.
  • the direction in which the speaker unit 10 is provided when viewed from the housing 20 is the front (upward direction in FIGS. 1 to 3), and the housing 20 is disposed when viewed from the speaker unit 10.
  • the direction is the rear (downward direction in FIGS. 1 to 3).
  • the speaker unit 10 includes a diaphragm 11, a driving unit 12, a unit support unit 13, and an edge unit 14.
  • the diaphragm 11 is a thin plate and is made of an elastic material such as resin, paper, or metal.
  • the diaphragm 11 is supported by one end of the diaphragm 11 connected to the drive unit 12 and the other end connected to the edge unit 14. Further, the diaphragm 11 is provided with a center cap 111 so as to cover the drive unit 12.
  • the center cap 111 may be made of the same material as that of the diaphragm 11 or may be made of a material different from that of the diaphragm 11.
  • the drive unit 12 has a configuration including, for example, a magnet and a coil.
  • the drive unit 12 is driven forward and backward so that the diaphragm 11 connected to the drive unit 12 reciprocates with an electromagnetic force generated according to an input electric signal.
  • the diaphragm 11 (including the center cap 111) vibrates, and a sound wave (front wave) is emitted toward the front of the diaphragm 11, and a sound wave (rear wave) is directed toward the rear of the diaphragm 11. Is emitted.
  • the unit support 13 is a frame of the speaker unit 10 and is made of, for example, resin or metal. Inside the unit support part 13, the diaphragm 11, the drive part 12, and the edge part 14 are arrange
  • the edge portion 14 has a thin film shape and is made of a flexible material such as cloth or urethane.
  • the edge portion 14 is connected to the other end of the diaphragm 11 whose one end is connected to the drive unit 12, so that the space in front of the diaphragm 11 is separated from the space in the rear.
  • the housing 20 includes an inner wall portion 21 that is partially open and has a space inside, and an outer wall portion 22 that is partially open and in which the inner wall portion 21 is disposed inside the space.
  • the opened end portions of the inner wall portion 21 and the outer wall portion 22 are integrated to form a peripheral edge portion 23.
  • casing 20 becomes a double wall structure from which the space between the inner wall part 21 and the outer wall part 22 becomes a sealed space.
  • the peripheral edge 23 is the frontmost end of the housing 20.
  • a surface having the peripheral edge 23 as the outer periphery is defined as an opening surface 24.
  • the direction from the opening surface 24 toward the space inside the inner wall portion 21 is the rear, and the opposite direction is the front.
  • the casing 20 illustrated in FIGS. 1 to 3 has an inner wall portion 21 and an outer wall portion 22 in a cylindrical shape with a bottom (more specifically, a cylinder whose one end portion is open and the other end portion is closed to become a bottom.
  • the axial centers of the inner wall portion 21 and the outer wall portion 22 pass through the opening surface 24 (more specifically, the cylindrical shaft center and the opening surface 24 intersect perpendicularly).
  • 2 is a cross section passing through the axial centers of the inner wall portion 21 and the outer wall portion 22 (that is, a cross section perpendicular to the opening surface 24).
  • the casing 20 is made of a metal material such as an iron-based material (for example, a steel material such as stainless steel), an aluminum-based material, a magnesium-based material, a titanium-based material, a copper-based material (for example, brass), or a material containing gold or silver. Can be applied.
  • resin-based materials such as CFRP (Carbon Fiber Reinforced Plastic), GFRP (Glass Fiber Reinforced Plastic), Soarnol (registered trademark), X-BARRIER (registered trademark), and inorganic materials other than metal materials such as glass and ceramics. It is also possible to apply.
  • CFRP Carbon Fiber Reinforced Plastic
  • GFRP Glass Fiber Reinforced Plastic
  • Soarnol registered trademark
  • X-BARRIER registered trademark
  • inorganic materials other than metal materials such as glass and ceramics.
  • a composite material in which a gas barrier film and a base material for example, a resin material
  • materials other than these may be applied as the material forming the housing 20, it
  • the speaker 1 at least a part of the speaker unit 10 is disposed in a space inside the inner wall portion 21 and is supported in contact with the inner wall portion 21 in a direction having a directional component parallel to the opening surface 24. .
  • the outer surface of the unit support portion 13 is supported in contact with the inner wall portion 21 along a direction parallel to the opening surface 24 and outward from the axis of the housing 20.
  • at least a part of the unit support portion 13 is supported in contact with the inner wall portion 21 at a position behind the front end portion (end portion connected to the edge portion 14) of the diaphragm 11. .
  • the front end portion of the speaker unit 10 is located in front of the peripheral edge portion 23. Furthermore, the outer edge of the speaker unit 10 extends to the front of the peripheral edge 23 and is separated from the peripheral edge 23. And at least a part of the rear side of the portion of the speaker unit 10 inserted into the space inside the inner wall portion 21 (the outer surface of the unit support portion 13) is in contact with and supports the opposing inner wall portion 21. Is done.
  • the speaker unit 10 contacts the inner wall portion 21 in a direction having a direction parallel to the opening surface 24 (in this example, a direction from the axis of the housing 20 toward the outside). That is, the speaker unit 10 contacts the inner wall 21 in a direction having a direction component perpendicular to the inner wall 21. Therefore, a region where the impedance is large with respect to a direction having a directional component perpendicular to the inner wall portion 21 and a transverse wave hardly propagates toward the outer wall portion 22 (in this example, a region where the unit support portion 13 contacts) It can be provided in the part 21. Therefore, by being excited by the backward wave of the speaker unit 10, it is possible to suppress the sneak propagation vibration that is mainly a transverse wave.
  • the main vibration direction of the speaker unit 10 (that is, the direction in which forward waves are radiated) is a direction perpendicular to the opening surface 24. Further, vibration in a direction perpendicular to the inner wall portion 21 (that is, a transverse wave) easily propagates to the inner wall portion 21 because the impedance of the inner wall portion 21 is relatively small, and vibration in a direction parallel to the inner wall portion 21 (that is, longitudinal vibration). Is not easily propagated to the inner wall 21 because the impedance of the inner wall 21 is relatively large.
  • the main vibration direction of the speaker unit 10 approaches a direction parallel to the inner wall portion 21.
  • the direct propagation vibration propagating from the speaker unit 10 to the inner wall portion 21 mainly becomes a longitudinal wave.
  • the longitudinal wave is difficult to propagate to the inner wall portion 21 as described above, the direct propagation vibration can be reduced. It becomes. Therefore, direct propagation vibration can be suppressed.
  • the speaker 1 according to the embodiment of the present invention has a simple structure in which the speaker unit 10 is supported in contact with the inner wall portion 21 and suppresses both sneak propagation vibration and direct propagation vibration. It becomes possible to suppress the propagation of sound waves through the housing 20.
  • the distance between the contact position near the rear of the unit support portion 13 and the inner wall portion 21 and the peripheral edge portion 23 can be increased. Therefore, it becomes possible to effectively suppress the sneak propagation vibration by increasing the distance for attenuating the sneak propagation vibration.
  • the speaker unit 10 since the speaker unit 10 is present in front of the peripheral portion 23 in the speaker 1, a part of the forward wave radiated from the speaker unit 10 is reflected or scattered unnecessarily by the peripheral portion 23. Interference with the radiated forward wave can be prevented. Moreover, since the said interference can be avoided, it becomes possible to make the shape of the peripheral part 23 into arbitrary shapes (especially shape suitable for suppressing a wraparound propagation vibration and a direct propagation vibration). Furthermore, in the speaker 1, since the outer edge of the speaker unit 10 does not contact the peripheral portion 23, it is possible to effectively suppress direct propagation vibration.
  • any method for supporting the speaker unit 10 on the inner wall 21 can be selected as long as the speaker unit 10 contacts the inner wall 21 in a direction having a directional component parallel to the opening surface 24.
  • the speaker unit 10 may be supported by the inner wall portion 21 by fixing the speaker unit 10 to the inner wall portion 21 using an adhesive or the like.
  • at least one of the speaker unit 10 and the inner wall portion 21 is provided with a support structure made of unevenness, and the speaker unit 10 is fixed to the inner wall portion 21 by this support structure, whereby the speaker unit 10 is supported by the inner wall portion 21. (For example, refer to a first embodiment described later, FIG. 4).
  • a support structure is provided on at least one of the speaker unit 10 and the inner wall portion 21 to fix the speaker unit 10 to the inner wall portion 21, and further, the speaker unit 10 is firmly attached to the inner wall portion 21 using an adhesive or the like.
  • the speaker unit 10 may be supported by the inner wall 21 by being fixed.
  • FIG. 4 is a sectional view showing a first example of the speaker according to the embodiment of the present invention, and shows a section corresponding to the section shown in FIG. 2 (section AA, see FIG. 1).
  • the speaker unit 10 is fixed to and supported by the inner wall portion 21 by a support structure provided at a contact portion between the speaker unit 10 and the inner wall portion 21.
  • the convex portion 211 provided on the inner wall portion 21 and the concave portion 131 provided on the outer surface of the unit support portion 13 are fitted to each other, so that the speaker unit 10 is It is fixed to the part 21 and supported.
  • the rear end portion of the unit support portion 13 inserted into the space inside the inner wall portion 21 is narrowed by the convex portion 211.
  • the convex part 211 and the concave part 131 are fitted to each other by passing through the space.
  • FIG. 4 the structure in which the convex portion 211 is provided on the inner wall portion 21 and the concave portion 131 is provided on the outer surface of the unit support portion 13 is illustrated. On the contrary, the concave portion is provided on the inner wall portion 21.
  • the structure which is provided and a convex part is provided in the unit support part 13 may be sufficient.
  • the structure provided in the outer surface of the inner wall part 21 and the unit support part 13 other than the convex part 211 and the recessed part 131 as shown in FIG. 4 may be sufficient.
  • the support structures such as the convex portions 211 and the concave portions 131 may be provided for the entire inner circumference of the inner wall portion 21 and the outer side of the unit support portion 13, or the inner side of the inner wall portion 21 and the unit support portion. You may provide partially with respect to the outer side of 13.
  • the speaker unit 10 is disposed in the space inside the inner wall portion 21 and is parallel to the opening surface 24, similarly to the speaker 1 having the basic configuration described above. (In this example, it is supported in contact with the inner wall portion 21 in a direction having a component).
  • FIG. 5 is a cross-sectional view showing a second example of the speaker according to the embodiment of the present invention, and shows a cross-section corresponding to the cross-section shown in FIG. 2 (cross-section AA, see FIG. 1).
  • a cross-section (cross-section in the left-right direction in the drawing) shape parallel to the opening surface 24 of a portion of the speaker unit 10 inserted into the space inside the inner wall portion 21 The outer diameter is gradually increased from the space inside the inner wall portion 21 toward the opening surface 24.
  • the outer surface of the unit support portion 13 is provided with a tapered surface 132 whose cross-section (cross-section in the left-right direction in the drawing) parallel to the opening surface 24 gradually increases toward the front. It has been.
  • the speaker unit 10 provided with such a tapered surface 132 When the speaker unit 10 provided with such a tapered surface 132 is inserted into the space inside the inner wall portion 21, the direction parallel to the opening surface 24 (in this example, the direction from the axial center of the housing 20 to the outside).
  • the speaker unit 10 When the speaker unit 10 is pressed against the inner wall portion 21 along the contact direction having components, stress along the contact direction is applied to the inner wall portion 21. Therefore, it becomes possible to effectively suppress the sneak propagation vibration.
  • the speaker unit 10 is in the inner wall portion along a direction having a directional component in the space inside the inner wall portion 21 and parallel to the opening surface 24.
  • the same effect can be obtained as long as it is supported by being pressed against 21. That is, since the speaker unit 10 is pressed against the inner wall portion 21 along a direction having a directional component parallel to the opening surface 24, stress along the contact direction is applied to the inner wall portion 21. Can be effectively suppressed.
  • [Third embodiment] 6 is a cross-sectional view showing a third example of the speaker according to the embodiment of the present invention, and shows a cross-section corresponding to the cross-section shown in FIG. 2 (cross-section AA, see FIG. 1).
  • the inner wall portion 21 is provided with a neck portion 212 (step portion) that protrudes toward the inner space.
  • the speaker unit 10 is supported by the inner wall 21 with the end of the speaker unit 10 inserted into the space inside the inner wall 21 in contact with the neck 212.
  • the neck portion 212 when the neck portion 212 is provided on the inner wall portion 21, the position of the speaker unit 10 in the space inside the inner wall portion 21 can be easily determined.
  • the neck portion 212 protrudes into the space inside the inner wall portion 21 so that the neck portion 212 (stepped portion) can come into contact with the end portion of the speaker unit 10 inserted into the space inside the inner wall portion 21.
  • the neck portion 212 (step portion) may have any shape as long as the above-described effects can be obtained.
  • the neck portion 212 (stepped portion) may be provided on the entire inner circumference of the inner wall portion 21 or may be provided partially on the inner side of the inner wall portion 21. Also good.
  • the speaker unit 10 is disposed in the space inside the inner wall portion 21 and is parallel to the opening surface 24, similarly to the speaker 1 having the basic configuration described above. (In this example, it is supported in contact with the inner wall portion 21 in a direction having a component).
  • FIG. 7 is a cross-sectional view showing a fourth example of the speaker according to the embodiment of the present invention, and shows a cross section corresponding to the cross section shown in FIG. 2 (cross section AA, see FIG. 1).
  • the shape of the peripheral portion 231 in a cross section perpendicular to the opening surface 24 is V-shaped.
  • the peripheral edge portion 231 has a shape in which the inner wall portion 21 and the outer wall portion 22 asymptotically approach the front (upward in the drawing).
  • peripheral edge portion 231 has a shape that bends sharply, vibration hardly passes through the peripheral edge portion 231. Therefore, it is possible to suppress vibration propagating from the inner wall portion 21 to the outer wall portion 22. At this time, from the viewpoint of effectively suppressing the passage of vibration, it is preferable that the peripheral edge portion 23 be bent into an acute angle and V-shaped as illustrated in FIG.
  • the peripheral edge portion 231 having such a shape is arranged so that the end portions of the inner wall portion 21 and the outer wall portion 22 are in contact with each other at a predetermined angle as shown in FIG. It is possible to form the end portions by joining the end portions by welding or brazing.
  • the inner wall portion 21 and the outer wall portion 22 may be integrally formed with the peripheral edge portion 231 by any method. Specifically, for example, one or both of the inner wall portion 21 and the outer wall portion 22 are bent so that the respective end portions approach each other, and the contacted end portions are joined by welding, brazing, or the like to form the peripheral edge portion 231. May be.
  • the speaker unit 10 is disposed in the space inside the inner wall portion 21 and is parallel to the opening surface 24, similarly to the speaker 1 having the basic configuration described above. (In this example, it is supported in contact with the inner wall portion 21 in a direction having a component).
  • the peripheral portion 231 is merely V-shaped, the propagation of sound waves through the housing 20 is suppressed by suppressing both the sneak propagation vibration and the direct propagation vibration, as in the basic configuration described above. Is possible.
  • the fourth embodiment if at least a part of the speaker unit 10 is brought into contact with the inner wall portion 21 in a space inside the inner wall portion 21 and at a position separated from the peripheral edge portion 231, it is not always necessary.
  • the inner wall 21 may not be contacted in a direction having a directional component parallel to the opening surface 24.
  • FIG. 8 is a side view showing the experimental method. As shown in FIG. 8, the experiment conducted this time was performed by fixing one end of a plate-like sample having a bent central portion and applying an impact to the fixed end to sandwich both sides of the central portion. Are measured by strain gauges SG1 and SG2, respectively.
  • the bent central portion of the sample corresponds to the peripheral portion
  • the fixed end portion (hereinafter referred to as inner side) to which an impact is applied corresponds to the inner wall portion
  • the opposite side hereinafter referred to as outer side
  • outer side corresponds to the outer wall. It corresponds to the part.
  • each sample used in this experiment is produced only by bending without performing welding or the like in order to confirm the effect of suppressing the passage of vibration caused only by the shape of the peripheral edge.
  • the length of the sample between the strain gauges SG1 and SG2 is 100 mm regardless of the shape of the sample, and the strain gauges SG1 and SG2 are arranged at positions equidistant from the center of the sample.
  • the width of each sample is 10 mm, and the plate thickness of the sample is two types of 0.5 mm and 1.0 mm.
  • FIG. 9 is a side view showing the shape of each sample. As shown in FIG. 9, there are five types of samples used in this experiment.
  • the sample shown in FIG. 9A is a V-shaped sample (hereinafter referred to as “sample V”) whose central portion is bent at an acute angle (20 ° in this example).
  • the sample shown in FIG. 9B is a U-shaped sample (hereinafter referred to as “sample U”) that is bent into a curved surface without being bent at the center.
  • the sample shown in FIG. 9C is a C-shaped sample (hereinafter referred to as “sample C”) that is bent at 90 ° at two locations of the inner portion and the outer portion of the center portion.
  • sample shown in FIG. 9A is a V-shaped sample (hereinafter referred to as “sample V”) whose central portion is bent at an acute angle (20 ° in this example).
  • the sample shown in FIG. 9B is a U-shaped sample (hereinafter referred to as “
  • sample inverted S is an inverted S-shaped sample (hereinafter referred to as “sample inverted S”) in which the inner portion of the central portion is bent at an acute angle and the outer portion is bent into a curved surface.
  • sample S is an S-shaped sample (hereinafter referred to as “sample S") in which the outer portion of the central portion is bent at an acute angle and the inner portion is bent into a concave and convex shape.
  • FIG. 10 is a graph showing a measurement result of vibration in the sample V.
  • FIG. 11 is a graph showing a measurement result of vibration in the sample U.
  • FIG. 12 is a graph showing a measurement result of vibration in the sample C.
  • FIG. 13 is a graph showing the measurement results of vibration in the sample reverse S.
  • FIG. FIG. 14 is a graph showing a measurement result of vibration in the sample S.
  • the graph (a) shows the measurement result of the strain gauge SG1 (measurement result of the vibration inside), and the graph (b) shows the measurement result of the strain gauge SG2 ( (Measurement results of vibration on the outside).
  • the graphs shown in (a) and (b) define the time when the vibration reaches the strain gauge SG1 as 0, and the maximum displacement in the measurement result of the strain gauge SG1 is 1. It is standardized so that Further, in each of FIGS. 10 to 14, a broken line connecting the displacement peaks in the graph of (a) (that is, a line indicating the temporal variation of the amplitude inside) is represented in the graphs of (a) and (b). it's shown.
  • the graphs shown in FIGS. 10 to 14 show the measurement results of vibration in a sample having a plate thickness of 0.5 mm.
  • the effect of suppressing the passage of vibration due to the shape of the sample is particularly strong immediately after the occurrence of vibration (for example, from about 0 to about 0.2 seconds).
  • the influence of the natural vibration of the sample and the like appears more strongly than the vibration passage suppression effect. Therefore, in the following, the vibration passage suppression effect due to the shape of each sample is evaluated by paying particular attention to the portion immediately after the occurrence of vibration in the vibration measurement results.
  • the amplitude of vibration measured outside the sample is significantly smaller than the amplitude of vibration measured inside the sample.
  • the sample U, the sample C, the sample reverse S, and the sample S seem to have a small amplitude to a certain extent, but the amplitude is remarkable as in the sample V. It will not be small.
  • the degree of amplitude decrease in each sample is quantitatively evaluated using the attenuation.
  • the degree of attenuation is a value obtained by dividing the sum of squares of vibration displacement measured outside the sample by the sum of squares of vibration displacement measured inside the sample for 0.2 seconds from the start of measurement.
  • FIG. 15 and 16 are graphs showing the degree of attenuation in each sample shown in FIG.
  • FIG. 15 is a graph showing the attenuation of a sample with a plate thickness of 0.5 mm
  • FIG. 16 is a graph showing the attenuation of a sample with a plate thickness of 1.0 mm.
  • the attenuation shown in the graphs of FIGS. 15 and 16 is obtained by preparing five samples having the same shape for each of the five shapes shown in FIG. This is obtained by averaging 25 attenuation values calculated from the 25 measurement results.
  • the attenuation of the sample V is significantly smaller than that of the other samples.
  • the attenuation degree of the sample C is as small as that of the sample V.
  • the attenuation of the sample V is significantly smaller than that of the other samples regardless of whether the plate thickness is 0.5 mm or 1.0 mm.
  • the sample reverse S and the sample S when attention is paid only to the bent portion, it can be said that the sample V is bent in an acute angle like the sample V.
  • the sample reverse S and the sample S have a small vibration suppression effect.
  • the central portion protrudes into the space surrounded by the inner side and the outer side and is folded back. Therefore, in the shape like the sample reverse S or the sample S, even if the passage of vibration is suppressed in the V-shaped portion, the shape is like a spring as a whole. Can be reduced (for example, see the portion after 0.2 seconds in the graph of FIG. 13).
  • FIG. 17 is a side view showing the shape of each sample. As shown in FIG. 17, there are four types of sample shapes used in this experiment.
  • the sample shown in FIG. 17 (a) is a V-shaped sample (hereinafter referred to as “sample V20”) that protrudes out of the space surrounded by the center and is folded back at 20 °. This is the same sample as shown in (a).
  • the sample shown in FIG. 17B is a V-shaped sample (hereinafter, referred to as “sample V70”) whose central portion protrudes outside the space surrounded by the inside and outside and is folded at 70 °.
  • sample shown in FIG. 17 is a V-shaped sample (hereinafter, referred to as “sample V70”) whose central portion protrudes outside the space surrounded by the inside and outside and is folded at 70 °.
  • sample V120 V-shaped sample
  • sample M M-shaped sample
  • FIGS. 18 and 19 are graphs showing the degree of attenuation in each sample shown in FIG.
  • FIG. 18 is a graph showing the attenuation of a sample having a plate thickness of 0.5 mm
  • FIG. 19 is a graph showing the attenuation of a sample having a plate thickness of 1.0 mm.
  • the attenuation shown in the graphs of FIGS. 18 and 19 is calculated by the same method as the attenuation shown in the graphs of FIGS.
  • the attenuation of the sample M is not so small compared to other V-shaped samples. That is, even if the sample is composed only of a shape bent at an acute angle into a V shape, if the shape protrudes into the space surrounded by the inner side and the outer side and is folded back, the effect of suppressing the passage of vibration may be reduced. I understand. In other words, it can be seen that even if the sample is composed of only an acute angle bent in a V shape, the effect of suppressing the passage of vibration is reduced if the sample is bent a plurality of times.
  • a sample with a smaller bending angle that is, a sample bent sharply
  • a vibration passing suppression effect You can see that it ’s big.
  • the effect of suppressing the passage of vibration is significantly greater in the sample V20 having a relatively small bending angle compared to the sample V70 and the sample V120 having a relatively large bending angle. Therefore, it can be seen that it is preferable to make the angle of bending smaller than 70 ° from the viewpoint of increasing the vibration suppression effect.
  • FIG. 20 is a sectional view showing a fifth example of the speaker according to the embodiment of the present invention, and shows a section corresponding to the section shown in FIG. 2 (section AA, see FIG. 1).
  • the air pressure in the sealed space between the inner wall portion 21 and the outer wall portion 22 is a negative pressure (a pressure lower than the atmospheric pressure, for example, about 10 ⁇ 2 Pa or more and 10 Pa or less. )become.
  • the speaker 1E of the present example includes an exhaust port 221 that penetrates a part of the outer wall portion 22 (the bottom portion in the example shown in FIG. 20), a sealing material 25 provided so as to close the exhaust port 221, and a sealing member. And a protective plate 26 provided so as to cover the outer surface of the stopper 25.
  • the sealing material 25 is a brazing material made of, for example, tin alone, an alloy of tin and silver, an alloy of copper and zinc, or the like, and is made of a material having a melting point lower than that of the material forming the housing 20. Further, the protection plate 26 is made of the same material as that of the housing 20, for example.
  • the cabinet between which the casing 20 is placed is evacuated to reduce the space between the inner wall portion 21 and the outer wall portion 22 through the exhaust port 221.
  • the temperature in the cabinet is raised to melt (soften) the sealing material 25, the sealing material 25 is brought into close contact with the exhaust port 221 and sealed, and then the temperature of the cabinet is lowered.
  • casing 20 is taken out from a cabinet, and the protection board 26 is joined to the outer wall part 22 by welding, brazing, etc. so that the outer surface of the sealing material 25 may be covered.
  • the sealed space between the inner wall portion 21 and the outer wall portion 22 is not negative pressure (that is, gas such as air is sealed in the sealed space)
  • the gas in the sealed space acts as a damper.
  • the vibration propagating from the inner wall portion 21 to the outer wall portion 22 through the sealed space can be suppressed to some extent.
  • the speaker unit 10 is disposed in the space inside the inner wall portion 21 and is parallel to the opening surface 24, similarly to the speaker 1 having the basic configuration described above. (In this example, it is supported in contact with the inner wall portion 21 in a direction having a component).
  • FIG. 21 is a cross-sectional view showing a sixth example of the speaker according to the embodiment of the present invention, and shows a cross section corresponding to the cross section shown in FIG. 2 (cross section AA, see FIG. 1).
  • a through hole 27 that penetrates the inner wall portion 21 and the outer wall portion 22 is provided in a part of the housing 20 (in the center of the bottom portion in this example).
  • a bass reflex port 28 is provided.
  • the space between the inner wall portion 21 and the outer wall portion 22 is a sealed space, and the housing 20 has a double wall structure.
  • the housing 20 is mounted in the same manner as the speaker 1 having the basic configuration described above and the speakers 1A to 1E of the first to fifth embodiments. It is possible to effectively suppress the propagation of the sound wave through.
  • the speaker unit 10 is disposed in the space inside the inner wall portion 21 and is parallel to the opening surface 24, similarly to the speaker 1 having the basic configuration described above. (In this example, it is supported in contact with the inner wall portion 21 in a direction having a component).
  • FIG. 22 is a cross-sectional view showing a seventh example of the speaker according to the embodiment of the present invention, and shows a cross section corresponding to the cross section shown in FIG. 2 (cross section AA, see FIG. 1).
  • FIG. 23 is an exploded perspective view of the speaker of FIG.
  • the speaker unit 10 is screwed and supported by the inner wall portion 21.
  • the screw thread 133 provided on the outer surface of the unit support portion 13 and the screw thread 213 provided on the inner wall portion 21 are screwed together, whereby the speaker unit 10 is The inner wall 21 is fixed and supported.
  • the flank 1331 of the screw thread 133 provided on the speaker unit 10 and the flank 2131 of the screw thread 213 provided on the inner wall 21 come into contact with each other.
  • the “flank” is a surface that connects the top and bottom of the screw thread.
  • the speaker unit 10 when the speaker unit 10 is screwed onto and supported by the inner wall portion 21, the speaker unit 10 can be attached to and detached from the housing 20. Therefore, the user can selectively combine desired ones from various speaker units 10 and housings 20 having different characteristics to obtain a speaker 1G having characteristics that match his / her preference.
  • the characteristics of the speaker unit 10 and the casing 20 include sound quality characteristics (for example, the material of the diaphragm 11 and the volume of the space behind the speaker unit 10 and surrounded by the inner wall portion 21 (air volume). ) And the like, and appearance characteristics such as color and shape are also included.
  • the support state of the speaker unit 10 by the housing 20 can be arbitrarily adjusted. For example, by increasing the screwing amount of the speaker unit 10, the volume of the space (air volume) behind the speaker unit 10 and surrounded by the inner wall portion 21 can be reduced, or the screwing amount of the speaker unit 10 can be reduced. By reducing the value, the volume of the space can be increased. Then, by performing such adjustment, the resonance state of the speaker unit 10 can be changed.
  • 22 and 23 exemplify a structure in which each of the screw threads 133 and 213 is formed for three rounds, but a structure in which the screw threads 133 and 213 are formed for one or two rounds is also possible. It is good also as a structure formed more than 4 times. Further, the number of the threads 131 and 213 may be different. 22 and 23 exemplify the case where each of the threads 133 and 213 has one and a continuous shape, but the threads 133 and 213 may be divided in the middle. Alternatively, a multiple spiral shape in which a plurality of wires are twisted in parallel may be used.
  • the speaker unit 10 is disposed in the space inside the inner wall portion 21 and is parallel to the opening surface 24, similarly to the speaker 1 having the basic configuration described above. (In this example, it is supported in contact with the inner wall portion 21 in a direction having a component).
  • [Eighth embodiment] 24 is a sectional view showing an eighth example of the speaker according to the embodiment of the present invention, and shows a section corresponding to the section shown in FIG. 2 (section AA, see FIG. 1).
  • the speaker unit 10 is screwed to and supported by the inner wall portion 21 as in the seventh embodiment described above.
  • the screw thread 134 provided on the outer surface of the unit support portion 13 and the screw thread 214 provided on the inner wall portion 21 are screwed together, whereby the speaker unit 10 is The inner wall 21 is fixed and supported.
  • the flank 1341 of the thread 134 provided on the speaker unit 10 and the flank 2141 of the thread 214 provided on the inner wall 21 come into contact with each other.
  • the outer diameter of the screw thread 134 on the speaker unit 10 side gradually increases from the space inside the inner wall portion 21 toward the opening surface 24.
  • the inner diameter of the screw thread 214 on the inner wall 21 side is also adjusted from the space inside the inner wall part 21 toward the opening surface 24 in accordance with the outer diameter of the screw thread 134 on the speaker unit 10 side. , Get bigger gradually.
  • the speaker unit 10 moves in accordance with the screwing of the speaker unit 10. It is pressed against the inner wall 21. That is, as the speaker unit 10 is screwed, stress along the direction having a directional component perpendicular to the inner wall portion is applied to the inner wall portion 21. Therefore, it is possible to effectively suppress the sneak propagation vibration.
  • the eighth embodiment can be interpreted as one of the modifications of the seventh embodiment described above.
  • the eighth embodiment can be interpreted as an embodiment in which the second embodiment described above is combined with the seventh embodiment described above.
  • FIG. 25 is a sectional view showing a ninth example of the speaker according to the embodiment of the present invention, and shows a section corresponding to the section shown in FIG. 2 (section AA, see FIG. 1).
  • the speaker 1I of this example is a third embodiment of the speaker 1G (see FIG. 22) of the seventh embodiment in which the speaker unit 10 is supported by being screwed to the inner wall portion 21.
  • a neck portion 212 (stepped portion) in the speaker 1C of the example (see FIG. 6) is provided.
  • each of the screw threads 133, 213 has a thick valley side and a thin mountain side, and is inclined with respect to a plane perpendicular to the screwing direction (vertical direction in the figure). It shall have. Specifically, for example, it is preferable that the threads 133 and 213 are triangular threads or trapezoidal threads.
  • neck portion 212 (stepped portion) is provided in the same manner as the speaker 1I of this example with respect to the speaker 1H of the eighth embodiment described above (see FIG. 24), similarly to the speaker 1I of this example, It is possible to effectively reduce the sneak propagation vibration.
  • FIGS. 26 to 28 are perspective views showing an example of a method for manufacturing the speaker housing according to the embodiment of the present invention.
  • FIG. 29 is a cross-sectional view of the speaker housing manufactured by the manufacturing method shown in FIGS. 26 to 28 show the steps of manufacturing the casing in the order of FIGS. 26, 27, and 28.
  • FIG. 29 shows a cross section corresponding to the cross section shown in FIG. 2 (cross section AA, see FIG. 1).
  • an inner wall body 21X and an inner wall bottom 21Y are produced.
  • the inner wall body 21X can be manufactured, for example, by bending a plate material into a cylindrical shape and then joining the joints by welding or brazing.
  • the inner wall bottom 21Y can be produced by, for example, drawing a plate material.
  • the shape of at least one end portion of the inner wall portion body portion 21X that is open is substantially equal to the shape of the end portion of the inner wall portion bottom portion 21Y that is open.
  • the inner wall part 21 is produced by joining each end part of the inner wall part trunk
  • the outer wall body 22X is manufactured.
  • the outer wall body portion 22X is formed into a cylindrical shape by bending the plate material in the same manner as the inner wall portion body portion 21X, and then joined by welding or brazing, and further to one end portion. It can be manufactured by performing a mouth drawing process.
  • the inner wall portion 21 is inserted into the space inside the outer wall portion barrel portion 22X so that the narrow end portion of the outer wall portion barrel portion 22X and the open end portion of the inner wall portion 21 are aligned. . Then, the end portion of the outer wall body portion 22X having a narrow mouth and the open end portion of the inner wall portion 21 are integrally joined by welding or brazing. Thereby, the peripheral part 23 is formed.
  • the peripheral part 23 formed with the manufacturing method of this example becomes a shape similar to the peripheral part 231 of 4th Example (refer FIG. 7) mentioned above.
  • the outer wall bottom 22Y is produced.
  • the outer wall bottom 22Y can be manufactured by subjecting a plate material to drawing and reverse drawing in order. And after inserting the open end of the outer wall bottom 22Y from the end side where the peripheral edge 23 of the outer wall trunk 22X is not formed, the folded portion of the outer periphery of the outer wall bottom 22Y is replaced with the outer wall trunk Join to the inside of 22X by welding or brazing.
  • the housing 20 as shown in FIG. 29 is manufactured.
  • the method of manufacturing the housing 20 shown in FIGS. 26 to 28 is merely an example, and the housing 20 can be manufactured by a method different from this method.
  • the inner wall portion 21 and the outer wall portion 22 have a circular bottomed cross section, and the axis of the inner wall portion 21 passes through the opening surface 24.
  • the case 20 is illustrated.
  • the shapes of the inner wall portion 21 and the outer wall portion 22 are not limited to this example.
  • the housing 20 in which the axis of the inner wall portion 21 does not pass through the opening surface 24 may be used.
  • the inner diameter of the opening surface 24 is smaller than the inner diameter of the body portion of the inner wall portion 21, and the opening surface 24 (peripheral portion 23) is the axial center of the inner wall portion 21.
  • It may be a bottomed cylindrical casing 20 that is in an eccentric position deviating from the above.
  • the shape of the inner wall portion 21 and the outer wall portion 22 is not limited to a bottomed cylindrical shape having a circular cross section, and may be any shape.
  • the cross section may be a bottomed cylindrical shape such as an ellipse or a polygon, or the bottom of a shell type or the like may not be a flat surface.
  • the outer surface of the unit support 13 in order to suppress direct propagation vibration, is not in contact with the peripheral portion 23 (the outer diameter in the vicinity of the peripheral portion 23 is partially The shape is smaller).
  • the shape of the outer surface of the unit support 13 is not limited to this example, and may be a shape that contacts the peripheral edge 23.
  • the peripheral portions 23 and 231 are formed by joining and integrating the inner wall portion 21 and the outer wall portion 22 by welding or brazing. Any joining method may be used. Specifically, for example, the end portions of the inner wall portion 21 and the outer wall portion 22 face each other or bend in the same direction and are overlapped, and the overlapped portions are joined by welding, brazing, or the like, so that the peripheral portions 23 and 231 are joined. May be formed.
  • one end of the inner wall portion 21 and the outer wall portion 22 is bent, brought into contact with the other end portion or the side surface, and the contacted portion is joined by welding, brazing, or the like, whereby the peripheral portion 23 , 231 may be formed.
  • one or both of the inner wall portion 21 and the outer wall portion 22 are bent into a crank shape and the end portions are overlapped, and the overlapped portions are joined by welding or brazing to form the peripheral portions 23 and 231. Also good.
  • the peripheral edge portions 23 and 231 may be formed by disposing a bridging material at the spaced apart end portions of the inner wall portion 21 and the outer wall portion 22 and joining them by welding or brazing.
  • peripheral portions 23 and 231 without joining the inner wall portion 21 and the outer wall portion 22.
  • the peripheral portions 23 and 231 may be formed without requiring joining by performing drawing or bending on a single plate material that is originally integral. In this case, you may join places other than the peripheral parts 23 and 231 by welding, brazing, etc. as needed.
  • the above-described speakers 1, 1A to 1I have a structure in which the speaker unit 10 contacts only the inner wall portion 21 and does not contact the outer wall portion 22.
  • the speaker unit 10 does not contact the outer wall portion 22. This does not completely exclude the structure that touches the surface.
  • a part of the speaker unit 10 may be in contact with the outer wall portion 22.
  • the contact between the speaker unit 10 and the outer wall portion 22 can be minimized. Propagation vibration can be sufficiently suppressed.
  • an elastic body for suppressing vibration may be provided between the speaker unit 10 and the housing 20.
  • the speaker 1 according to the embodiment of the present invention has a structure capable of suppressing the propagation of sound waves through the housing, only a few elastic bodies need be provided.
  • an elastic body may be provided between the speaker unit 10 and the outer wall portion 22. In this case, direct propagation vibration can be further suppressed.
  • the speaker unit 10 may have a baffle plate.
  • the speaker unit 10 may have a configuration in which a baffle plate is provided around the front end and the diaphragm 11.
  • the baffle plate forms part of the speaker unit 10.
  • the baffle plate may be integrated with the unit support portion 13 so as to be in contact with and supported by the inner wall portion 21.
  • the present invention can be suitably used for a speaker having a double wall structure and a speaker housing applied to the speaker.
  • Speaker 10 Speaker unit 11: Diaphragm 111: Center cap 12: Drive part 13: Unit support part 131: Recessed part 132: Tapered surface 133, 134: Screw thread (speaker unit side) 1331, 1341: Frank 14: Edge part 20: Case 21: Inner wall part 211: Convex part 212: Neck part (step part) 213, 214: Screw thread (inner wall side) 2131, 2141: Frank 21X: Inner wall trunk 21Y: Inner wall bottom 22: Outer wall 221: Exhaust hole 22X: Outer wall trunk 22Y: Outer wall bottom 23,231: Peripheral part 24: Opening surface 25: Sealing material 26: Protection plate 27: Through hole 28: Bass reflex port

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  • Acoustics & Sound (AREA)
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PCT/JP2014/056247 2013-11-01 2014-03-11 スピーカ及びスピーカ用筐体 WO2015064121A1 (ja)

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JP2014552994A JP5715313B1 (ja) 2013-11-01 2014-03-11 スピーカ及びスピーカ用筐体
CN201480006805.5A CN104969567B (zh) 2013-11-01 2014-03-11 扬声器以及扬声器用框体
SG11201505760RA SG11201505760RA (en) 2013-11-01 2014-03-11 Speaker and speaker housing
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CN107509145A (zh) * 2017-08-29 2017-12-22 歌尔股份有限公司 发声装置模组以及发声装置模组的制作方法
JP2018207226A (ja) * 2017-05-31 2018-12-27 サーモス株式会社 真空二重構造体及びその製造方法、並びにヘッドホン

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JP6313663B2 (ja) * 2014-06-03 2018-04-18 淳一 加賀美 バックロードホーン型スピーカーボックス
KR101661191B1 (ko) 2015-09-30 2016-09-29 이연택 휴대용 스피커 장치 및 그의 이용 방법
KR101720104B1 (ko) * 2016-03-24 2017-03-27 주식회사 크롬아리아 금속 이중관 인클로저를 구비한 스피커
KR101866907B1 (ko) 2016-07-26 2018-06-12 이연택 포터블 스피커 장치
JP7011979B2 (ja) * 2017-05-31 2022-01-27 サーモス株式会社 真空二重構造体及びその製造方法、並びにヘッドホン
JP6872438B2 (ja) * 2017-06-28 2021-05-19 サーモス株式会社 真空二重構造体及びスピーカー装置
JP6863837B2 (ja) * 2017-06-28 2021-04-21 サーモス株式会社 スピーカー装置
JP7020026B2 (ja) * 2017-09-27 2022-02-16 カシオ計算機株式会社 スピーカユニットおよび電子機器
KR20190088311A (ko) 2018-01-18 2019-07-26 주식회사 이디연 포터블 스피커
KR102607338B1 (ko) * 2022-12-27 2023-11-29 주식회사 아나로기즘 천연 양모를 이용하여 저음 음질을 조절하고 방사형의 이중 울림통을 포함하는 스피커의 구조 및 음질의 특성에 따라 스피커의 구조를 자동 설계하는 인공지능 시스템

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10234091A (ja) * 1997-02-21 1998-09-02 Matsushita Electric Ind Co Ltd スピーカ装置
US20030092791A1 (en) * 2001-06-27 2003-05-15 Okamitsu Jeffrey K. Free radical polymerization method having reduced premature termination, apparatus for performing the method, and product formed thereby

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6315691U (zh) 1986-07-16 1988-02-02
TW354866B (en) * 1994-03-31 1999-03-21 Matsushita Electric Ind Co Ltd Loudspeaker and a method for producing the same
CA2245351A1 (en) * 1998-09-08 2000-03-08 The Canadian Loudspeaker Corporation Forced air cooling system
JP2003092791A (ja) * 2001-09-18 2003-03-28 Sony Corp スピーカシステム
JP4355652B2 (ja) * 2004-12-27 2009-11-04 埼玉日本電気株式会社 電子機器及びその防塵構造
JP2006340015A (ja) * 2005-06-01 2006-12-14 Pioneer Electronic Corp スピーカ装置
CN2899353Y (zh) * 2006-03-24 2007-05-09 黄恩志 一种音箱结构
CN101170841A (zh) * 2006-10-27 2008-04-30 株式会社建伍 扬声器
CN101855670A (zh) * 2007-09-13 2010-10-06 哈曼国际工业有限公司 扬声器锥壳体
JP4538483B2 (ja) * 2007-10-23 2010-09-08 株式会社カシオ日立モバイルコミュニケーションズ 防水構造及び電子機器
CN201222791Y (zh) * 2008-05-16 2009-04-15 吴胜君 一种竹制音箱
EP2530953B1 (en) * 2010-01-25 2018-03-14 Murata Manufacturing Co., Ltd. Ultrasonic vibration device
WO2013046355A1 (ja) * 2011-09-28 2013-04-04 三菱電機株式会社 動電型放音体
TWM448098U (zh) * 2012-09-17 2013-03-01 Accesspro Electronics Co Ltd 可利用容器的喇叭結構

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10234091A (ja) * 1997-02-21 1998-09-02 Matsushita Electric Ind Co Ltd スピーカ装置
US20030092791A1 (en) * 2001-06-27 2003-05-15 Okamitsu Jeffrey K. Free radical polymerization method having reduced premature termination, apparatus for performing the method, and product formed thereby

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018207226A (ja) * 2017-05-31 2018-12-27 サーモス株式会社 真空二重構造体及びその製造方法、並びにヘッドホン
CN107509145A (zh) * 2017-08-29 2017-12-22 歌尔股份有限公司 发声装置模组以及发声装置模组的制作方法
CN107509145B (zh) * 2017-08-29 2023-12-22 歌尔股份有限公司 发声装置模组以及发声装置模组的制作方法

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