JPH0898297A - Loudspeaker - Google Patents

Abstract

PURPOSE: To provide a loudspeaker without requiring a waterproofing material such as a waterproofing cover, etc., in addition and capable of obtaining a sufficient waterproof effect even against foggy water droplets by the use of a simple constitution and obtaining sufficient sound pressure in a low frequency band without regulating the amplitude of a diaphragm. CONSTITUTION: A damper 10 which supports a voice coil bobbin 5 freely reciprocally is formed with cotton cloth in which phenolic resin is impregnated, which supplies sufficient permeability and water repellency. A nearly conical closing part 10b is formed on the outer peripheral part of the damper 10 in one, and the air holes 9b of a frame 9 are covered with the closing part 10b. The back face side area Sa of the diaphragm 7 is made to communicate with the outside air Sb via the closing part 10b. A water droplet can be blocked by the closing part 10b, and only the air can freely be inputted/outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker used in an environment where waterproofness is required, such as a door-mounted speaker for a vehicle or a speaker for ships, and more particularly to a waterproof member such as a waterproof cover. The present invention relates to a speaker in which the speaker unit itself has a waterproof property without being separately provided.

[0002]

2. Description of the Related Art When a vehicle travels in the rain, rainwater enters the space between the outer wall and the inner wall of a door through a window gap or the like. Therefore, it is indispensable to additionally provide a waterproof member such as a waterproof cover to the door-mounted speaker embedded in this door in order to prevent the entry of water droplets. FIG. 4 is a sectional view showing a conventional vehicle-mounted door mount speaker device. Reference numeral 31 in the drawing is an inner wall of a vehicle door,
Reference numeral 32 is also the outer wall of the door. The speaker unit 40 is attached with its sound emitting surface facing the inner wall of the door, that is, the interior of the vehicle. This speaker unit 40
On the opposite side (left end in the drawing) of the sound emitting surface of No. 4, a magnetic circuit 44 formed by an annular magnet 41 sandwiched between an annular upper plate 42 and a lower plate 43 having a center pole 43a is provided. ing. This magnetic circuit 44
A voice coil 46 wound around a cylindrical voice coil bobbin 45 is inserted in the magnetic gap 44a.
An inner peripheral side of a substantially conical diaphragm 47 is adhesively fixed to the right end portion of the voice coil bobbin 45 in the drawing. The outer peripheral side of the diaphragm 47 is supported by the outer peripheral portion of the frame 49 via an edge 48.

Like the diaphragm 47, the frame 49 has a substantially conical shape, and the inclined surface of the frame 49 is a ventilation hole for communicating the rear area Sa of the diaphragm 47 with the outside air (the space inside the door) Sb. A plurality of 49a are provided. By allowing air to flow in and out of the ventilation holes 49a, 49a, ..., The vibration plate 47 can be vibrated in the left-right direction in the drawing with a large amplitude. Further, the inner peripheral portion of the damper 50 having a wavy cross-sectional shape is adhered to the outer peripheral surface of the voice coil bobbin 45. The outer peripheral portion of the damper 50 is the frame 4
It is adhered to the flat portion 49b of the inner surface of 9. With this damper 50, the voice coil bobbin 45 and the diaphragm 47
Are supported so that they can surely vibrate in the lateral direction in the figure without causing abnormal vibration.

A speaker unit 40 having the above structure
The rear side is inserted and embedded in the mounting hole 31a formed in the inner wall 31 of the door. However, as described above, since water droplets such as rainwater enter the space between the inner wall 31 and the outer wall 32 of the door, the water droplets enter the speaker unit 40 from the ventilation holes 49a, 49a, ... Formed in the frame 49. When it enters, the vibration plate 47, which is mainly made of paper material, may deteriorate, or water droplets may adhere to a lead wire (not shown) for supplying a current to the voice coil 46, causing a short circuit. As a means for preventing this, a structure in which a waterproof cover for covering the speaker unit 40 as a whole is provided on the back side of the speaker unit 40 is generally adopted.

The waterproof cover 51 shown in FIG. 4 is, for example, AB.
The frame 49 is made of synthetic resin such as S resin and has a substantially conical shape that is slightly larger than the frame 49. This waterproof cover 51
A plurality of through holes 51a, 51a, ...
Is provided so that the rear surface side of the speaker unit 40 is not hermetically sealed, and the air flow between the rear surface side area Sa of the diaphragm 47 and the outside air Sb is secured as much as possible. In addition, each through hole 51a, 51a,
A projecting piece 51b that is inclined downward is formed on the upper side of ..
It does not enter the inside of the waterproof cover 51 from a. Further, a cutout portion 51c is formed at the lower end portion of the back surface of the waterproof cover 51 in the figure. This notch 51
Similar to the through hole 51a, c is provided so as not to seal the back side of the speaker unit 40 and to insert a connector (not shown) that supplies an audio signal to the speaker unit 40. A projection 51d for preventing water droplets from entering is also formed on the upper side of the cutout 51c.

According to the door-mounted speaker device having the above structure, since the back surface of the speaker unit 40 is almost entirely covered with the waterproof cover 51, even if rainwater enters the interior space of the vehicle door, the water drops. Water droplets are shielded by the waterproof cover 51 and do not enter the speaker unit 40. Further, since the waterproof cover 51 is provided with the through hole 51a and the cutout portion 51c, it is possible to secure an air flow between the rear side region Sa of the diaphragm 47 of the speaker unit 40 and the outside air Sb. .

[0007]

According to the door mount speaker device described above, the speaker unit 40 can be protected from the water droplets dripped inside the door of the vehicle. However, in reality, a strong airflow is generated inside the door of the vehicle during traveling due to wind pressure, and when raindrops enter the door, the raindrops float as mist-like water droplets. Therefore, the water-proof cover 51 having the through holes 51a, 51a, ... Or the cutout portion 51c cannot shield the mist-like water droplets, and the inside of the speaker unit 40 cannot be seen from the ventilation holes 49a, 49a ,. Navelous water droplets intrude. Therefore,
During long-term use, the vibration plate 47 made of paper material is deteriorated, or the lead wire for supplying the current to the voice coil 46 is corroded, so that the sound quality is deteriorated or the lead wire is broken. There was a possibility to do.

Further, the waterproof cover 51 has a plurality of through holes 5
1a, 51a, ... And notches 51c are provided, but the number cannot be increased unnecessarily in order to prevent the waterproof performance from deteriorating.
Since the a and the notch 51c are covered to a large extent by the protruding piece 51b and the protruding portion 51d for preventing the intrusion of water droplets, when the diaphragm 47 of the speaker unit 40 has a large amplitude, the through hole 51a and the notch 51c. Flow resistance occurs when air passes through 51c, which increases the back side pressure of the diaphragm 47 and suppresses the amplitude of the diaphragm 47, and it is said that a sound pressure particularly in a low range cannot be sufficiently obtained. There were challenges.

Further, since the waterproof cover 51 having the protruding piece 51b and the protruding portion 51d for preventing the entry of water droplets is arranged on the back side of the speaker unit 40, the front side of the speaker unit 40 to the back side of the waterproof cover 51. However, the thickness h of the speaker device as a whole up to the tip of the protruding piece 51b becomes large, and the place where it can be installed is limited.

The present invention has been made in view of the above problems, and it is not necessary to separately provide a waterproof member such as a waterproof cover and has a simple structure and exhibits a sufficient waterproof effect against mist-like water droplets. Moreover, it is an object of the present invention to provide a speaker that can obtain a sufficient sound pressure in a low frequency range without restricting the amplitude of the diaphragm.

[0011]

In order to solve the above-mentioned problems, the present invention relates to a voice coil bobbin in which a voice coil is wound and inserted into a magnetic gap of a magnetic circuit, and an inner peripheral side of the voice coil bobbin is coupled to the voice coil bobbin. A vibrating plate, a frame for supporting the outer peripheral side of the vibrating plate, which has a ventilation hole for communicating the back side area of the vibrating plate with the outside air, and the voice coil bobbin formed of a breathable material can reciprocate And a damper for supporting the air conditioner, wherein the ventilation hole of the frame is closed by a closing portion formed integrally with the damper.

Also, a voice coil bobbin around which a voice coil is wound and inserted into a magnetic gap of a magnetic circuit,
A diaphragm whose inner peripheral side is coupled to the voice coil bobbin;
A frame having a ventilation hole for communicating the rear side region of the diaphragm with the outside air and supporting the outer peripheral side of the diaphragm; and a damper formed of a material having air permeability for reciprocally supporting the voice coil bobbin. In the speaker, the outer peripheral surface of the magnetic circuit is covered by the frame, and the ventilation hole of the frame is closed by a water-repellent closing portion formed integrally with the damper. It is characterized by.

In the above first and second means, the damper can be formed from a cloth material impregnated with a synthetic resin having water repellency such as a phenol resin.

Further, in the above first and second means,
The damper may be formed of a cloth material such as cotton cloth, and at least the closed portion thereof may be subjected to a water repellent treatment such as a fluorine resin coating.

[0015]

According to the above-mentioned means, the vent hole provided in the frame for communicating the back side region of the diaphragm with the outside air is blocked by the closing portion integrally provided in the damper supporting the voice coil bobbin. Therefore, for example, when the speaker is used by being embedded in the door of a vehicle, it is possible to prevent water droplets floating in a mist inside the door from being blocked by the blocking portion and entering the inside of the frame. Further, since the damper is formed of a material having air permeability such as a mesh-like cloth material, the closed portion integrated with the damper can allow only water to pass through without allowing water droplets having large particles to pass through. Therefore, a waterproof member such as a waterproof cover is not required, and a high waterproof effect can be obtained with a simple structure, and the flow resistance of air in the back side region of the diaphragm can be reduced, and the amplitude of the diaphragm can be suppressed. Also disappears. Further, compared with a speaker device in which a waterproof member is arranged on the back side of the speaker, the thickness dimension of the speaker is significantly reduced, and the degree of freedom of installation location is increased.

Further, the frame is formed of, for example, synthetic resin or aluminum die cast so that the outer peripheral surface of the magnetic circuit is covered with this frame, and the ventilation holes of the frame are made water-repellent integrally with the damper. If it is closed by the blocking part, the entire back side of the speaker will be waterproof, and it will be possible to prevent water droplets from entering the speaker more reliably and also to prevent corrosion of the magnetic circuit part using the iron material. Can be prevented.

The damper as a whole can be formed of a cloth material impregnated with a synthetic resin having water repellency such as a phenol resin, including the closed portion.

Further, the damper itself may be formed of a simple cloth material such as cotton cloth, and at least only the closed portion may be coated with, for example, a fluorine resin by a post-treatment to obtain water repellency.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a sectional view showing a state in which a speaker according to a first embodiment of the present invention is embedded in a door of a vehicle, and FIG. 2 is an exploded perspective view showing a main part of the speaker. Reference numeral 1 in the figure
Is a ring-shaped upper plate 3 with a ring-shaped magnet 2
And a lower plate 4 having a cylindrical center pole 4a
It is a magnetic circuit sandwiched between and. The upper plate 3 and the lower plate 4 are made of a highly magnetically permeable material such as pure iron, and a magnetic gap 1a, which is an annular space, is formed between the inner peripheral surface of the upper plate 3 and the outer peripheral surface of the center pole 4a. Has been formed.

A voice coil 6 wound around one end of a voice coil bobbin 5 on the cylinder is inserted into the magnetic gap 1a. When a voice current is applied to the voice coil 6,
A force is applied to the voice coil 6 in the left-right direction in the figure, so that the voice coil bobbin 5 and the voice coil bobbin 5 are
The vibrating plate 7 coupled to is similarly vibrated in the left-right direction. The diaphragm 7 is mainly formed of a paper material in a substantially conical shape, and the smaller diameter side thereof is the voice coil bobbin 5.
Is bonded and fixed to the other end of the. The large-diameter side of the diaphragm 7 is elastically supported by the outer peripheral portion of the frame 9 via an edge 8 formed of a soft material and having a semicircular cross section. The lead wire of the voice coil 6 is the voice coil bobbin 5.
Of the terminal plate 6a that is pulled out to the sound emitting surface side (right side in the drawing) of the diaphragm 7 along the outer peripheral surface of the
To the terminal plate 6a.
An audio signal is supplied by connecting a connector from a sound source (not shown).

The frame 9 has a substantially conical shape like the diaphragm 7, and the inclined surface 9a is provided with a plurality of ventilation holes 9b for communicating the rear area Sa of the diaphragm 7 with the outside air Sb. ing. Since air can freely flow in and out through the ventilation holes 9b, 9b, ..., The vibrating plate 7 can vibrate in the left-right direction in the drawing with a large amplitude. The inner peripheral portion of the frame 9 is caulked and fixed to the upper plate 3 described above, whereby the frame 9 and the magnetic circuit 1 are coupled.

On the outer peripheral surface of the other end of the voice coil bobbin 5, an inner peripheral portion of a damper 10 having a holding portion 10a having a wavy cross section is adhered. This damper 10
For example, a mesh-shaped cotton cloth impregnated with a phenol resin is formed by hot press molding, and has sufficient air permeability and water repellency. A substantially conical closing part 10b is integrally provided on the outer peripheral side of the holding part 10a, and the closing part 10b adheres to the inner surface of the inclined surface 9a in a state of covering the ventilation holes 9b, 9b, ... It is fixed. Therefore, only the air can freely pass through the vent holes 9b, 9b, ... And the water droplets having large particles cannot pass through. With this damper 10, the voice coil 6 wound around the voice coil bobbin 5 is aligned with the center position of the magnetic gap 1a, and the voice coil bobbin 5 and the diaphragm 7 are oriented in the vertical direction in the drawing or in a direction orthogonal to the plane of the drawing. It is supported so that it can vibrate in the left-right direction without causing abnormal vibration.

As shown in FIG. 1, the loudspeaker S1 having the above-mentioned construction is embedded by embedding the rear surface side thereof into the mounting hole 11a formed in the inner wall 11 of the vehicle door, and the flange portion of the outer peripheral portion of the frame 9 is The inner wall 11 is fixed with screws. Inner wall 11 and outer wall 1 of the door
Water droplets such as rainwater intrude into the space between the two when the vehicle travels in the rain, and the water droplets are suspended in a mist by the strong airflow generated in the space. However, according to the above-described speaker S1, the ventilation holes 9b of the frame 9,
.. are blocked by a water-repellent closing portion 10b provided integrally with the damper 10, so that water drops and mist-like water drops that enter the frame 9 through the ventilation holes 9b, 9b ,. Without vibration plate 7 made of paper
Can be reliably prevented from being deteriorated by moisture or from being broken due to corrosion of the tinsel wire 6a.

As described above, according to the speaker S1 of this embodiment, it is not necessary to separately provide a waterproof member such as the waterproof cover 51 as shown in FIG. 4, and the number of parts is not increased, and the structure is simple and highly waterproof. The effect can be obtained. Further, the back side of the speaker S1 is not covered with the waterproof member, and the ventilation holes 9b, 9b, ...
Since the closing portion 10b covering the cover has sufficient air permeability,
The flow resistance of the air moving between the back surface side area Sa of the diaphragm 7 and the outside air Sb becomes small, the amplitude of the diaphragm 7 is not suppressed, and the sound pressure particularly in the low range is improved. is there. Further, as compared with the speaker device in which the waterproof member is arranged on the back side of the speaker unit, the thickness dimension H1 from the sound emitting surface side to the back side of the speaker S1 is significantly reduced, and the degree of freedom of installation location is increased. .

FIG. 3 is a sectional view showing a state in which a speaker according to a second embodiment of the present invention is embedded in a vehicle door. Reference numeral 21 in the drawing is a frame formed of a synthetic resin such as ABS resin in a substantially bowl shape. The inclined surface 2 of this frame 21
1a is provided with a plurality of ventilation holes 21b, 21b, ... And an annular piece 21c is integrally formed on the inner surface of the inclined surface 21a. Further, the bottom portion (left side in the drawing) of the frame 21 is formed in a substantially W-shaped cross section, and has an annular recess 21d.
Also, an escape portion 21e continuous with the recess 21d is provided. The frame 21 may be made of other material such as aluminum die cast.

A ring 22 made of a highly magnetically permeable material such as pure iron and an annular magnet 23 having a U-shaped cross section and arranged on the outer peripheral side of the ring 22 are fitted in the recess 21d of the frame 21. Wearing and configured magnetic circuit 24
Is provided. That is, the magnetic circuit 24 is
It is attached so that it is entirely covered by the bottom of the. Two annular magnetic gaps 24a and 24b are formed between the inner peripheral side end surface of the annular magnet 23 and the outer peripheral surface of the ring 22 which faces the inner peripheral side end surface. The direction of the magnetic flux in one magnetic gap 24a is opposite to the direction of the magnetic flux in the other magnetic gap 24b.

Voice coils 26a and 26b wound around a cylindrical voice coil bobbin 25 are inserted into the magnetic gaps 24a and 24b, respectively. The voice coils 26a and 26b are wound in opposite directions according to the directions of the magnetic fluxes of the magnetic gaps 24a and 24b,
When a voice current is applied to each voice coil 26a, 26b, a force in the same direction acts on the voice coil 26a, 26b. Voice coil 26a, 26
The lead wire 26c of b is pulled out to the right side in the drawing along the outer peripheral surface of the voice coil bobbin 25, and is connected to the connection terminal 26d fixed to the outer surface of the frame 21 through the tinsel wire 26e. A connector is connected from a sound source and an audio signal is supplied. The escape portion 21e of the frame 21 is formed by the voice coil bobbin 25.
Is to prevent the end of the voice coil bobbin 25 from coming into contact with the bottom of the frame 21 and restricting the amount of amplitude when it moves to the left in the figure.

Reference numeral 27 is a diaphragm formed from a paper material in a substantially conical shape, the inner peripheral side of which is bonded and fixed to the outer peripheral surface of the voice coil bobbin 25. The outer peripheral side of the diaphragm 27 is elastically supported by the outer peripheral portion of the frame 21 through an edge 28 formed of a soft material and having a semicircular cross section. The rear surface side area Sa of the diaphragm 27 is the frame 2
The vent holes 21b, 21b, ... Formed in 1 communicate with the outside air Sb. Further, the outer peripheral surface of the voice coil bobbin 25 is adhered to the inner peripheral portion of the damper 29 having the corrugated holding portion 29a. This damper 29
Is, for example, a cotton cloth formed on a substantially circular plate by hot press molding, and has sufficient air permeability. A substantially cone-shaped closing portion 29b is integrally provided on the outer peripheral side of the holding portion 29a, and the closing portion 29b is formed in the frame 21.
Of the frame 21 while covering the ventilation holes 21b, 21b, ...
Is fixed to the inner surface of the inclined surface 21a. The closed portion 29b is coated with a fluorine-based resin such as Teflon after the hot press molding, and has sufficient water repellency.

Since the frame 21 is provided with the annular piece 21c as described above, when the damper 29 is attached to the frame 21, the outer peripheral edge of the holding portion 29a is fitted to the annular piece 21c. The centering operation of the damper 29 can be performed easily and surely.
The damper 29 aligns the voice coils 26a and 26b wound around the voice coil bobbin 25 with the center positions of the magnetic gaps 24a and 24b, respectively, and the voice coil bobbin 25 and the diaphragm 27 are arranged in the vertical direction in the drawing or on the paper surface. It is supported so that it can vibrate in a direction orthogonal to the direction without causing abnormal vibration.

According to the speaker S2 having the above structure,
Like the speaker S1 of the first embodiment, the frame 2
Since the one vent hole 21b, 21b, ... Is covered and shielded by the water-repellent closing part 29b provided integrally with the damper 29, the dripping water drop and the mist-like water drop are vent holes 21b, 21b ,. .. does not enter into the frame 21, and it is possible to reliably prevent the occurrence of obstacles such as deterioration of the diaphragm 27 made of paper material due to moisture. In addition,
According to the speaker S2 of the present embodiment, as shown in FIG. 3, the tinsel cord 26e is arranged inside the holding portion 29a of the damper 29 and is covered by the frame 21, so that water droplets are not attached to the tinsel cord 26e. It can be completely prevented. Further, since the magnetic circuit 24 is covered by the bottom portion of the frame 21, the entire rear side of the speaker S2 has waterproofness, water droplets and the like can be more reliably prevented from entering the inside of the speaker S2, and the magnetic field is reduced. It is also possible to prevent corrosion of the pure iron ring 22 and the annular magnet 23 that form the circuit 24.

As described above, also in the speaker S2 of the present embodiment, it is not necessary to separately provide a waterproof member such as the waterproof cover 51 as shown in FIG. 4, and the number of parts is not increased, and a simple structure provides a high waterproof effect. Can be obtained.
Further, the waterproof member does not cover the back side of the speaker S2, and the ventilation holes 21b, 2 of the frame 21 are not covered.
Since the closed portion 29b covering 1b, ... Has sufficient air permeability, the flow resistance of the air moving between the rear area Sa of the diaphragm 27 and the outside air Sb becomes small, and the diaphragm 2
The amplitude of 7 is not suppressed, and the sound pressure particularly in the low frequency range is improved. Further, as compared with the speaker device in which the waterproof member is arranged on the back side of the speaker unit, the thickness dimension H2 from the sound emitting surface side to the back side of the speaker S2 is significantly reduced, and the degree of freedom of installation location is increased. .

In the first and second embodiments described above, an example is shown in which the entire damper or only the blocking portion is made water repellent, but this blocking portion does not necessarily have to be water repellent. It suffices as long as it can block the dropped water droplets or the atomized water droplets from directly adhering to the diaphragm or the like in the frame. Therefore, it is possible to ensure the waterproof property even if the closed portion is formed of a fine cotton cloth or the like which is a general material for the damper. However, in order to prevent water droplets from penetrating into the frame even when used for a long period of time, it is desirable that the closed portion be water repellent as shown in the first and second embodiments. Further, in the above-described embodiment, an example in which the present invention is applied to an on-vehicle door mount speaker embedded in a vehicle door is shown, but a waterproof property such as a speaker for a ship or a speaker attached to an electric device used outdoors is waterproof. The present invention can be applied to all loudspeakers that are required.

[0033]

As described above, according to the present invention, the ventilation hole provided in the frame for communicating the rear side region of the diaphragm with the outside air is closed integrally with the damper supporting the voice coil bobbin. Since the speaker is blocked by the parts, when the speaker is used by being embedded in the door of a vehicle, for example, water droplets floating in a mist inside the door may be blocked by the blocking part and enter the inside of the frame. It is prevented and does not directly adhere to the diaphragm or the like supported in this frame. Thus, sufficient waterproof performance can be obtained without separately providing a waterproof member such as a waterproof cover and without increasing the number of parts. In addition, as described above, the back surface of the speaker is not covered with the waterproof member, and the closed portion integrated with the damper is formed of a breathable material such as a mesh-like cloth material, so that large water droplets do not pass through. Since only the air can freely pass through, the flow resistance of the air flowing in and out of the area on the back side of the diaphragm can be reduced, so that the amplitude of the diaphragm is not suppressed and is low. The sound pressure in the range is improved. Further, compared with a speaker device in which a waterproof member is arranged on the back side of the speaker, the thickness dimension of the speaker is significantly reduced, and the degree of freedom of installation location is increased.

Further, the frame is formed of, for example, synthetic resin or aluminum die cast so that the outer peripheral surface of the magnetic circuit is covered with this frame, and the ventilation holes of the frame are made water-repellent integrally with the damper. If it is closed by the blocking part, the entire back side of the speaker will be waterproof, and it will be possible to prevent water droplets from entering the speaker more reliably and also to prevent corrosion of the magnetic circuit part using the iron material. Can be prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a speaker according to a first embodiment of the present invention is embedded in a vehicle door.

FIG. 2 is an exploded perspective view showing a main part of the speaker according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which a speaker according to a second embodiment of the present invention is embedded in a vehicle door.

FIG. 4 is a cross-sectional view showing a conventional vehicle-mounted door mount speaker device.

[Explanation of symbols]

 1, 24 Magnetic circuit 1a, 24a, 24b Magnetic gap 5, 25 Voice coil bobbin 6, 26a, 26b Voice coil 7, 27 Vibration plate 9, 21 Frame 9b, 21b Vent hole 10, 29 Damper 10b, 29b Closure part Sa rear side Area Sb Outside air S1, S2 Speaker

Claims (4)

[Claims] 1. A voice coil bobbin around which a voice coil is wound and inserted into a magnetic gap of a magnetic circuit, a diaphragm whose inner peripheral side is connected to the voice coil bobbin, and a rear side region of the diaphragm as outside air. A speaker having a frame having ventilation holes for communicating and supporting an outer peripheral side of the diaphragm, and a damper formed of a material having air permeability and supporting the voice coil bobbin so as to be capable of reciprocating,
A speaker characterized in that the ventilation hole of the frame is closed by a closing portion formed integrally with the damper. 2. A voice coil bobbin around which a voice coil is wound and inserted into a magnetic gap of a magnetic circuit, a diaphragm whose inner peripheral side is connected to the voice coil bobbin, and a rear side region of the diaphragm as outside air. A speaker having a frame having ventilation holes for communicating and supporting an outer peripheral side of the diaphragm, and a damper formed of a material having air permeability and supporting the voice coil bobbin so as to be capable of reciprocating,
A speaker characterized in that an outer peripheral surface of the magnetic circuit is covered by the frame, and a ventilation hole of the frame is closed by a water-repellent blocking portion formed integrally with the damper. 3. The speaker according to claim 1, wherein the damper is formed of a cloth material impregnated with a water-repellent resin. 4. The speaker according to claim 1, wherein the damper is formed of a cloth material, and at least the closing portion is subjected to a water repellent treatment.