JP2007288673A - Speaker apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such problems that response characteristics of a speaker apparatus are degraded by influences of back pressure fluctuation within a speaker unit since a conventional back-supported speaker is covered with a columnar shaft, diaphragm, magnetic circuit or the like and the inside of the speaker unit has a structure in which air is hardly permeated, and that there is possibility to incur the thermal break of a voice coil since heat generated from the voice coil is hardly radiated and the heat is accumulated to elevate the temperature within the speaker unit. <P>SOLUTION: A shaft for fixing the speaker unit to the casing of a speaker is linked to a pole forming a part of the magnetic circuit of the speaker unit, and the pole and shaft are formed with holes communicating in an axial direction in axial center portions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a speaker device in which a fixing member, a weight, or the like is connected to the back surface of a magnetic circuit, and particularly relates to a speaker device in which an air flow passage is formed.

  As one method of fixing the speaker unit to the housing of the speaker device, there is a fixing method of fixing the speaker unit to the housing on the back side of the speaker unit. A conventional example fixed to the housing on the back side will be described with reference to the drawings.

  FIG. 4 is a cross-sectional view showing a conventional speaker device 110.

  The speaker device 110 includes a housing 1, partition plates 2 and 3, a shaft 83, shaft cushions 84 and 94, speaker units 80 and 90, and the speaker units 80 and 90 include diaphragms 81 and 91 and a dust cap 87. 97, frames 85 and 95, and a magnetic circuit (consisting of poles 82 and 92, yokes 88 and 98, plates 89 and 99, voice coils 86 and 96, etc.). The position of the speaker device 110 is fixed to the partition plates 2 and 3 so that the first speaker unit 80 and the second speaker unit 90 face each other via the shaft 83.

  The shaft 83 is a member having high thermal conductivity, and is formed in a cylindrical shape including screw portions (83a, 83d) for connecting the speaker units 80, 90. The screw portions 83a and 83d of the shaft 83 are each formed as a reverse screw (right screw or left screw). The screw portions 83a and 83d of the shaft 83 are screwed into the screw portion 82a of the pole 82 of the first speaker unit 80 and the screw portion 92a of the pole 92 of the second speaker unit 90, and the first speaker unit 80 The position is adjusted and fixed to the partition plates 2 and 3 with the second speaker unit 90 facing each other.

  On one end side (shaft 83 side) of the poles 82 and 92, screw portions 42a and 52a for screwing the shaft 83 are respectively formed as reverse screws (right screw or left screw).

  The shaft cushions 84 and 94 are made of an elastic material and have a concave cross section. When the speaker units 80 and 90 are fixed to the partition plates 2 and 3 using the shaft 83, the shaft cushions 84 and 94 are interposed between the shaft 83 and the partition plates 2 and 3. Is provided to reduce vibrations from the speaker units 80 and 90.

  The partition plates 2 and 3 are attached and fixed to the housing 1, and the partition plate 2 fixes the speaker unit 80 via the shaft 83, and the partition plate 3 attaches the speaker unit 90 via the shaft 83. To fix.

  In the speaker device 110, first, the shaft cushions 84 and 94 are attached to the partition plates 2 and 3, the shaft 83 is inserted between the partition plates 2 and 3, and then the speaker unit 80 is connected to the speaker from the right side of FIG. The unit 90 is inserted in the direction of the shaft cushions 84 and 94 from the left side of FIG. Then, the screw portion 83a of the shaft 83 is screwed to the screw portion 82a of the pole 82, the screw portion 83d of the shaft 83 is screwed to the screw portion 92a of the pole 92, and the speaker units 80 and 90 are attached to the shaft cushions 84 and 94. Contact and press. The threaded portions 83a and 83d of the shaft 83 are formed as reverse screws, and the position of the speaker unit 80 and the speaker unit 90 is narrowed or widened depending on the screwing rotation direction of the shaft 83. The speaker units 80 and 90 are pressed and fixed to the partition plates 2 and 3.

  When the speaker device 110 is driven, the voice coils 86 and 96 vibrate to generate sound, and heat is generated from the voice coils 86 and 96. The heat of the voice coils 86 and 96 is dissipated through the magnetic circuit. However, when a large input is required, the temperature of the voice coils 86 and 96 increases sharply and the heat dissipation cannot be completed, and the voice coils 86 and 96 are damaged by heat generation. There is a fear. Further, when a large input is required, the influence of the back air pressure inside the speaker unit (hereinafter referred to as back pressure) accompanying the vibration of the diaphragms 81 and 91 becomes large, and the response characteristics deteriorate.

  As a countermeasure against this, it is conceivable to reduce the influence of temperature rise and back pressure by providing ventilation holes in the diaphragms 81 and 91 and providing ventilation holes in the center poles of the yokes 88 and 98. The influence of this back pressure is that when the diaphragms 81 and 91 move outward, the internal pressure becomes sparse and the force pulling the diaphragm inward acts to narrow the amplitude, and the diaphragm moves inward. This is because the internal pressure becomes dense when moved, and the force pushing the diaphragm toward the outside acts to narrow the amplitude, so that an appropriate value of the amplitude cannot be obtained.

An idea for suppressing the temperature rise in the speaker unit is a known example described below (Patent Document 1). According to the speaker structure of Patent Document 1, the position of the speaker flange is fixed to the speaker housing by screwing, and a duct connected to the opening of the housing on the back of the speaker is connected to the speaker unit. The heat generated in can be dissipated outside the housing.
Japanese Patent No. 3239509

  In a conventional back-supported speaker unit, if the diaphragm is provided with a vent hole, the vibration characteristics may change, and considering this, a sufficient heat dissipation opening area cannot be obtained, resulting in poor heat dissipation. . Further, in the speaker unit in which the shaft is fixed on the back surface of the speaker unit or the weight is fixed on the shaft, the shaft is fixed on the back surface and the weight is fixed, so that a hole cannot be formed in the center pole. For example, even if the hole can be fixed in the center pole, the hole is blocked by the shaft or weight. In such a case, not only the temperature rise due to heat radiation, but the back pressure generated by the vibration of the diaphragm affects the vibration of the voice coil, and the response characteristics are degraded. In particular, when the input resistance is increased, the influence of the back pressure increases, so that there is a problem that the input resistance cannot be increased.

  The present invention solves such a problem, improves the air flow in the speaker unit, suppresses temperature rise in the speaker unit, reduces back pressure fluctuation in the speaker unit, and responds. It is an object of the present invention to realize a speaker that improves the sound quality.

  In order to achieve the above object, the present invention provides at least a diaphragm and a drive unit, a speaker unit having a drive unit disposed behind the diaphragm, a housing for housing the speaker unit, and the housing In order to fix the speaker unit to the shaft, the shaft connected to the back side of the speaker unit in the housing and supporting the speaker unit, and the drive unit of the speaker unit are directed from the diaphragm side to the back side. The shaft has a through hole penetrating in the axial direction, and the through hole of the shaft and the through hole of the speaker unit are communicated with each other. .

  A first speaker unit and a second speaker unit, wherein the first speaker unit and the second speaker unit are fixed to the housing so as to face each other via the shaft; The second through-hole intersects with the through-hole and communicates with the outside air portion.

  Also, a speaker unit including at least a diaphragm and a drive unit, the drive unit being disposed behind the diaphragm, a housing that houses the speaker unit, and a mass that can virtually act as a ground for acoustic vibrations A weight provided with a connecting portion for connecting the speaker unit, and a driving portion of the speaker unit has a through-hole penetrating from the diaphragm side toward the back side, and the weight penetrates in the axial direction. It has a through hole, and the through hole of the speaker unit and the through hole of the weight communicate with each other.

  Further, the speaker unit having at least a diaphragm and a drive unit, the drive unit being disposed behind the diaphragm, a housing for housing the speaker unit, and virtual grounding for acoustic vibration can act. A weight having a mass, a shaft connecting the speaker unit and the weight, and a driving portion of the speaker unit have a through-hole penetrating from the diaphragm side toward the back side, and the shaft penetrates in the axial direction. The through hole of the speaker unit and the through hole of the shaft communicate with each other.

  According to the first aspect, even if the shaft is connected to the magnetic circuit, the hole communicating with the outside is formed in the shaft, so that the generated heat of the voice coil can be dissipated to the outside and the temperature rise can be suppressed. . In addition, by reducing the influence of the back pressure of the diaphragm by venting the air near the voice coil to the outside through the vent hole, the response characteristics of the speaker can be improved, and the input resistance that can withstand the large input to the speaker unit It is possible to realize a high speaker. According to the second aspect, even if the magnetic circuits of the two speaker units are connected by the shaft, the shaft is formed with a hole communicating with the outside, so that the heat in the speaker unit is dissipated to the outside and the temperature rises. Can be suppressed. In addition, by reducing the influence of the back pressure of the diaphragm by venting the air near the voice coil to the outside through the vent hole, the response characteristics of the speaker can be improved, and the input resistance that can withstand the large input to the speaker unit It is possible to realize a high speaker.

  According to the third aspect, even if the weight is connected to the magnetic circuit, the weight is formed in the weight so that the heat in the speaker unit is dissipated to the outside and the temperature rise is suppressed. it can. In addition, by reducing the influence of the back pressure of the diaphragm by venting the air near the voice coil to the outside through the vent hole, the response characteristics of the speaker can be improved, and the input resistance that can withstand the large input to the speaker unit It is possible to realize a high speaker. According to claim 4, even if a shaft or a weight is connected to the magnetic circuit, a hole communicating with the outside is formed in the shaft or the weight, so that the heat in the speaker unit is dissipated to the outside and the temperature rises. Can be suppressed. In addition, by reducing the influence of the back pressure of the diaphragm by venting the air near the voice coil to the outside through the vent hole, the response characteristics of the speaker can be improved, and the input resistance that can withstand the large input to the speaker unit It is possible to realize a high speaker.

(Example 1)
A first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a speaker device 10 according to a first embodiment of the present invention.

  The speaker device 10 includes a housing 1, partition plates 2 and 3, a shaft 23, shaft cushions 25 and 35, nuts 27 and 37, speaker units 20 and 30, and the speaker units 20 and 30 include a diaphragm 21, 31, dust caps 87 and 97, frames 29 and 39, and a magnetic circuit (consisting of poles 22 and 32, yokes 88 and 98, plates 89 and 99, voice coils 86 and 96, etc.). In addition, about the same structure as a prior art example, the same code | symbol is provided and the description is abbreviate | omitted.

  In the speaker device 10, the first speaker unit 20 and the second speaker unit 30 are fixed in position so as to face each other via a shaft 23. In the shaft 23, a hole 23b penetrating in the axial direction is formed in the axial center portion, and a plurality of holes 23c communicating in a direction perpendicular to the hole 23b are opened to the outside. .

  The shaft 23 is provided to fix the speaker units 20 and 30 to the housing 1 via the partition plates 2 and 3. The shaft 23 is formed in a columnar shape having screw portions (23a, 23e) that are connected to the speaker units 20, 30 with a member having high thermal conductivity. Each of the screw portions (23a, 23e) is formed as a reverse screw (right screw or left screw). The screw portions (23a, 23e) of the shaft 23 are screwed into the screw portions 22a of the pole 22 of the first speaker unit 20 and the screw portions 32a of the pole 32 of the second speaker unit 30, and the first speaker unit. In a state where 20 and the second speaker unit 30 face each other, the position is adjusted and held between the partition plates 2 and 3. And the screw part 23f for screwing the nuts 27 and 37 provided so that the clamping to the partition plates 2 and 3 of the 1st speaker unit 20 and the 2nd speaker unit 30 by the shaft 23 may not be loosened. Is formed.

  Further, a hole 23b penetrating in the axial direction is provided in the axial center portion. In addition, since the hole 23b can be enlarged as the diameter of the shaft is larger, it is possible to improve the air flow.

  On one end side (shaft 23 side) of the poles 22 and 32, screw portions 22a and 32a for screwing the shaft 23 are respectively formed as reverse screws (right screw or left screw).

  The shaft cushions 25 and 35 are made of an elastic material and have a concave cross section. When the speaker units 20 and 30 are fixed to the partition plates 2 and 3 using the shaft 23, the shaft cushions 25 and 35 are interposed between the shaft 23 and the partition plates 2 and 3. It is provided to reduce resonance and the like to the housing 1 due to vibration from the speaker units 20 and 30.

  The partition plates 2 and 3 are attached and fixed to the housing 1 and are formed of a thick plate-like metal material or the like.

  The nuts 27 and 37 are heat conductive members formed in a hexagonal column shape (or a quadrangular column shape or the like), and screw portions 27 a and 37 a are formed inside, and the partition plate 2 of the speaker units 20 and 30 by the shaft 23. The shaft 23 is fixedly locked to the partition plates 2 and 3 by being screwed with the screw portion 23f of the shaft 23 so that the pinching to 3 is not loosened.

  The speaker device 10 first attaches the shaft cushions 25 and 35 to the partition plates 2 and 3, inserts the shaft 23 between the partition plates 2 and 3, and then moves the speaker unit 20 from the right side of FIG. 1. The speaker unit 30 is inserted in the direction of the shaft cushions 25 and 35 from the left side of FIG. Then, the screw portion 23a of the shaft 23 is screwed to the screw portion 22a of the pole 22, and the screw portion 23e of the shaft 23 is screwed to the screw portion 32a of the pole 32, whereby the speaker units 20 and 30 are respectively connected to the shaft cushion 25. , 35 to contact and press. The speaker unit 20 is fixed to the partition plate 2 and the speaker unit 30 is fixed to the partition plate 3 by screwing the shaft 23 to the poles 22 and 32. Then, the nuts 27 and 37 are screwed into the screw portions 23f of the shaft 23, and the speaker units 20 and 30 are fixedly locked to the partition plates 2 and 3 via the shaft cushions 25 and 35, respectively. The speaker units 20 and 30 are sandwiched between the partition plates 2 and 3 by the shaft 23 by screwing the reverse screw portions (23a and 23e) formed on the shaft 23 to the screw portions 22a and 32a of the poles 22 and 32. Done. That is, the position of the speaker unit 20 and the speaker unit 30 is adjusted by narrowing or widening the space between the speaker unit 20 and the speaker unit 30 according to the screwing rotation direction of the shaft 23. It is clamped so as to be pressed through 35.

  In the first embodiment, the screw portions 23a and 23e of the shaft 23 are screwed into the screw portions 22a and 32a of the poles 22 and 32 so that the speaker units 20 and 30 are sandwiched between the partition plates 2 and 3, and then the shaft 23 The shafts 23 are fixedly locked to the partition plates 2 and 3 by using nuts 27 and 37 so that the screw portions 23a and 23e are not loosened. However, the nuts 27 and 37 are not particularly used without being particular about this. Also good.

  As described above, in the speaker device 10, the holes 22 b and 32 b of the poles 22 and 32 and the holes 23 b and 23 c of the shaft 23 are communicated with each other so that the air inside the speaker units 20 and 30 communicates with the outside ( By forming the holes 22b, 23c, 32b, and 23b), the air in the speaker units 20 and 30 is vented to the outside through the air flow paths (holes 22b, 23c, 32b, and 23b). The effect of back pressure is reduced and response characteristics are improved.

Further, since the heat generated from the voice coils 86 and 96 is efficiently radiated from the air flow path, it is possible to suppress a temperature rise in the speaker unit.
(Example 2)
A second embodiment of the present invention will be described with reference to the drawings.

  FIG. 2 is a cross-sectional view showing a speaker device 60 according to the second embodiment of the present invention. In addition, about the same structure as Example 1, the same code | symbol is provided and the description is abbreviate | omitted.

  The speaker device 60 includes a housing 1, partition plates 2 and 3, shafts 43 and 53, shaft cushions 45 and 55, reverse screw nuts (turn buckles) 44, speaker units 40 and 50, and the like. In the speaker device 60, the first speaker unit 40 and the second speaker unit 50 are fixed in position so as to face each other via shafts 43 and 53. The shafts 43 and 53 are formed with holes 46 and 56 penetrating in the axial direction in the axial center portion, and a plurality of holes 47 and 57 penetrating in the direction perpendicular to the holes 46 and 56 are opened to the outside. It is to be formed.

  The speaker device 60 includes a first speaker unit 40 and a second speaker unit 50 that are symmetrically fixed to the partition plates 2 and 3 of the housing 1 via shafts 43 and 53. Since the components other than the shaft 52 and the shafts 43 and 53 are the same as those in the first embodiment, only the portions related to the connecting portion 100 shown in FIG.

  The shaft 43 is fixed to the pole 42 of the first speaker unit 40, and the shaft 53 is fixed to the pole 52 of the second speaker unit 50. The shafts 43 and 53 are fixed to the partition plates 2 and 3 via reverse screw nuts (hereinafter referred to as turnbuckles) 44 so that the first speaker unit 40 and the second speaker unit 50 face each other. It is provided for this purpose. The mounting and fixing of the first speaker unit 40 and the second speaker unit 50 is performed by screwing the turnbuckle 44 into the screw portions (43b, 53b) of the shafts 43, 53.

  The shafts 43 and 53 are members having high thermal conductivity and are formed in a columnar shape having screw portions (43a and 53a) for connecting the speaker units 40 and 50, and penetrate through the respective axial centers in the axial direction. And a plurality of holes 47 and 57 penetrating in the direction perpendicular to the holes 46 and 56 are formed outside. In addition, screw portions 43a and 53a for screwing to the poles 42 and 52 are formed on one end side (poles 42 and 52 side), and the reverse side for turning the turnbuckle 44 to the other end side. Screw parts (43b, 53b) are formed.

  The reverse screw portions (43b, 53b) are respectively formed as reverse-winding screws (right screw or left screw). The threaded portion 43b of the shaft 43 is threadedly engaged with the threaded portion 44a of the turnbuckle 44, and the threaded portion 53b of the shaft 53 is threadedly engaged with the threaded portion 44b of the turnbuckle 44. The speaker unit 50 is positioned and fixed to the partition plates 2 and 3 with the speaker units 50 facing each other.

  Holes 42b and 52b communicating with the holes 46 and 56 of the shafts 43 and 53 are formed in the axial direction of the poles 42 and 52 in the axial direction. In addition, screw portions 42a and 52a for screwing the shafts 43 and 53 are formed on one end side (the shafts 43 and 53 side) of the axial center portions of the holes 42b and 52b of the poles 42 and 52, respectively.

  The shaft cushions 45 and 55 are made of an elastic material and have a concave cross section. The shaft cushions 45 and 55 are interposed between the shafts 43 and 53 and the partition plates 2 and 3 to reduce vibrations from the speaker units 40 and 50. It is what was done.

  The partition plates 2 and 3 are attached and fixed to the housing 1, and fix the speaker units 40 and 50 via the shafts 43 and 53.

  The turnbuckle 44 is formed of a heat conductive member in a hexagonal column shape (or a quadrangular column shape, etc.), and the right and left ends have opposite threading directions (if one end is threaded clockwise, the other end Reverse threaded parts (44a, 44b) are formed in which the side threading is left-handed).

  The screw portion 44a of the turnbuckle 44 is screwed with the screw portion 43b of the shaft 43, and the screw portion 44b of the turnbuckle 44 is screwed with the screw portion 53b of the shaft 53. The speaker units 50 face each other and are sandwiched between the partition plates 2 and 3. That is, the interval between the speaker unit 40 and the speaker unit 50 is adjusted by narrowing or widening according to the screwing rotation direction of the turnbuckle 44, and the speaker units 40, 50 are respectively placed at predetermined positions on the partition plates 2, 3. It is pressed and clamped via cushions 45 and 55.

  In the speaker device 60, first, the shaft cushion 45 is mounted on the partition plate 2, and the shaft cushion 55 is mounted on the partition plate 3, respectively. Then, the screw portion 43a of the shaft 43 is screwed to the screw portion 42a of the pole 42, the shaft 43 is attached to the speaker unit 40, the screw portion 53a of the shaft 53 is screwed to the screw portion 52a of the pole 52, and the speaker A shaft 53 is attached to the unit 50. The speaker unit 40 to which the shaft 43 is attached is disposed so as to contact the shaft cushion 45 from the right side in FIG. 2, and the speaker unit 50 to which the shaft 53 is attached contacts the shaft cushion 55 from the left side in FIG. Arrange. The screw portions 44a and 44b of the turnbuckle 44 are screwed into the screw portions 43a and 53a of the shafts 43 and 53 attached to the speaker units 40 and 50 disposed so as to face each other. The gap with the unit 50 is adjusted, and the partition plates 2 and 3 are clamped at predetermined positions via the shaft cushions 45 and 55.

As described above, the speaker device 60 includes the holes 42b and 52b of the poles 42 and 52, the holes 46 and 56 of the shafts 43 and 53, and a plurality of holes 47 opened to the outside in communication with the holes 46 and 56 in the direction perpendicular thereto. , 57 are communicated with each other. As a result, air passages (hole 42b, hole 46, hole 56, hole 52b) through which the air inside the speaker units 40, 50 communicates with the outside are formed, and the back of the speaker units 40, 50 inside. Pressure fluctuations are alleviated and response characteristics are improved. Further, since the heat generated from the voice coil is efficiently radiated from the air flow path (hole 42b, hole 46, hole 56, hole 52b), it is possible to suppress the temperature rise in the speaker units 40, 50. Become.
Example 3
Embodiment 3 of the present invention will be described with reference to the drawings.

  FIG. 3 is a cross-sectional view showing a speaker device 70 according to a third embodiment of the present invention. In addition, about the same structure as Example 1, 2, the same code | symbol is provided and the description is abbreviate | omitted.

  The speaker device 70 according to the present invention includes a speaker unit 20, a weight 71, a housing 1, a partition plate 2, and the like. The position of the speaker unit 20 and the weight 71 is fixed so as to face each other through a shaft 74 that is integrally formed with the weight 71 (or fixed with a screw or the like).

  As shown in FIG. 3, the shaft 74 is formed with a hole 73 penetrating in the axial direction in the axial center portion.

  The shaft 74 is integrally formed with the weight 71 (or fixed with a screw or the like), and a screw portion 74a is formed to be screwed into the screw portion 22a of the pole 22 forming a part of the magnetic circuit. Yes. And in order to press the shaft cushion 72 with the shaft 74, the convex contact surface 74b is formed.

  The weight body 71 is engaged with the speaker unit 20 via the shaft 74 and is provided to absorb vibration from the speaker unit 20 and the like and to balance the weight with the speaker unit 20. The weight 71 is formed in a cylindrical shape with a metal material having a weight corresponding to the weight of the speaker unit 20 with the partition plate 2 as a fulcrum.

  The shaft cushion 72 is made of an elastic material and has a concave cross section. The shaft cushion 72 is provided between the shaft 74 and the partition plate 2 to reduce vibrations from the speaker unit 20.

  The partition plate 2 is attached and fixed to the housing 1 and fixes the speaker unit 20 and the weight body 71 to the housing 1.

  In the speaker device 70, first, a shaft cushion 72 is attached to the partition plate 2, and the speaker unit 20 is disposed so as to contact the shaft cushion 72 from the opening of the housing 1 (the right side shown in FIG. 3). Then, the shaft 74 integrally formed with the weight body 71 (or fixed with screws or the like) is inserted from the other (left side shown in FIG. 3). Then, the threaded portion 74 a of the shaft 74 is screwed into the threaded portion 22 a of the pole 22 and fixed to the partition plate 2.

  As described above, in the speaker device 70, the air flow path (hole 22 b, hole 73) that communicates the air inside the speaker unit 20 to the outside by communicating the hole 22 b of the pole 22 and the hole 73 of the shaft 74. It is formed. Thereby, the back pressure fluctuation | variation inside the speaker unit 20 reduces, and a response characteristic improves. Further, since heat generated from the voice coil is efficiently radiated from the air flow path (hole 22b, hole 73), it is possible to suppress an increase in temperature in the speaker unit 20.

It is sectional drawing of the speaker apparatus of Example 1 of this invention. It is sectional drawing of the speaker apparatus of Example 2 of this invention. It is sectional drawing of the speaker apparatus of Example 3 of this invention. It is sectional drawing of the conventional speaker apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Speaker housing 2, 3 ... Partition plate 10, 60, 70, 110 ... Speaker device 20, 30, 40, 50, 80, 90 ... Speaker unit 21, 41, 51 .. Diaphragm 22, 42, 52 ... Pole 23, 43, 53, 83 ... Shaft 25, 35, 45, 55, 72, 84, 94 ... Shaft cushion 29, 39, 49, 59 ..Frame 32, 46, 56, 73 ... Communication hole 44 ... Reverse screw nut (turn buckle)
47, 57 ... communication hole 71 ... weight body 88, 98 ... yoke 87, 97 ... dust cap 89, 99 ... plate

Claims (4)

A speaker unit including at least a diaphragm and a driving unit, and the driving unit disposed behind the diaphragm;
A housing for housing the speaker unit;
In order to fix the speaker unit to the housing, the shaft is connected to the back side of the speaker unit in the housing and supports the speaker unit;
The drive unit of the speaker unit has a through-hole penetrating from the diaphragm side toward the back side,
The shaft has a through hole penetrating in the axial direction;
The speaker device, wherein the through hole of the shaft and the through hole of the speaker unit communicate with each other. A first speaker unit and a second speaker unit, wherein the first speaker unit and the second speaker unit are fixed to the housing so as to face each other via the shaft; The speaker device according to claim 1, further comprising a second through hole that intersects with the through hole and communicates with an outside air portion. A speaker unit including at least a diaphragm and a driving unit, and the driving unit disposed behind the diaphragm;
A housing for housing the speaker unit;
A weight having a mass that can virtually act as a ground for acoustic vibration, and having a connecting portion for connecting the speaker unit;
The drive unit of the speaker unit has a through-hole penetrating from the diaphragm side toward the back side,
The weight has a through-hole penetrating in the axial direction;
A speaker device comprising a through hole of the speaker unit and a through hole of the weight communicating with each other. A speaker unit including at least a diaphragm and a driving unit, and the driving unit disposed behind the diaphragm;
A housing for housing the speaker unit;
A weight having a mass capable of acting by grounding against acoustic vibration virtually,
A shaft connecting the speaker unit and the weight;
The drive unit of the speaker unit has a through-hole penetrating from the diaphragm side toward the back side,
The shaft has a through hole penetrating in the axial direction;
A speaker device comprising a through hole of the speaker unit and a through hole of the shaft communicating with each other.