KR20100021352A - Speaker - Google Patents

Abstract

PURPOSE: A speaker is provided to prevent the contact between a bobbin and a permanent magnet, a plate, or a yoke by installing a damper under the bobbin. CONSTITUTION: A diaphragm(155) is combined with the upper side of a base frame(157). A yoke is combined with the lower side of the base frame. A magnet(112) is fixed inside the yoke. A plate(113) is fixed to the upper side of the opposite magnet to the yoke. The magnetic body is combined with the base frame. A voice coil(153) is wound around a bobbin(152). The bobbin is vertically inserted between the outer side of the plate and the inner side of the yoke from the upper side of the magnetic body. The bobbin is combined with the diaphragm. A damper(151) is connected to the lower side of the bobbin and the magnetic body. The damper prevents the deformation of the lower side of the bobbin.

Description

Speaker {SPEAKER}

The present invention relates to a speaker, which relates to a speaker that firmly fixes a damper for preventing deformation of a lower bobbin, prevents distortion of reproduction sound, and reduces the size of a speaker having the same output.

In general, a speaker combines a bobbin with a diaphragm attached to the upper part and a coil wound around its outer body with a magnetic material, and then vibrates the diaphragm by vibrating the bobbin up and down by flowing a current having a sound signal through the voice coil to generate an electric sound signal. To reproduce the actual sound.

When the bobbin is deformed, the speaker is in contact with a magnetic material or a plate, and accordingly, distortion occurs in the reproduced sound, thereby degrading sound quality.

Accordingly, various prior arts have been disclosed to prevent deformation of bobbins in order to prevent distortion of the reproduced sound.

Examples of the prior art, Korean Patent Laid-Open Publication No. 1999-56378 (Prior Art 1), Korean Patent Publication No. 1999-9284 (Prior Art 2), Korean Patent Publication No. 2001-107404 (Prior Art 3) Speaker).

The prior art 1 discloses a speaker in which a magnet is positioned on an outer circumference of a bobbin and a damper is attached to a lower bobbin in an area between the mark net and the bobbin.

The prior art 1 prevents the lower deformation of the damper by placing the damper at the bottom of the bobbin.

The prior art 2 and the prior art 3, the magnet is positioned on the outer periphery of the bobbin, to form a plurality of magnetic pole holes in the vertical direction, respectively wound the coil on the outer periphery of the bobbin located in each magnetic pole hole, the top of the bobbin and A speaker for fixing a lower part with a damper is disclosed.

The prior arts 2 and 3 improve the output sound pressure level by increasing the magnetic flux density and supporting the upper and lower sides of the bobbin with a damper to prevent deformation of the bobbin. Accordingly, it is possible to improve the sound quality reproduced by preventing the distortion of sound.

However, since the magnets are located on the outer circumference of the bobbin, there is a limit to increasing the diameter of the bobbin.

In addition, since the size of the diameter of the bobbin is limited, when the diaphragm is formed into a flat plate, deformation of the diaphragm may occur, such as a deformation of the bobbin.

In addition, the prior art is a constraint that the application of the flat plate-type diaphragm is a constraint to lower the height of the speaker, making it difficult to manufacture a slim speaker and a home appliance that requires a slim type sound output to which the speaker is applied. It also causes problems.

In addition, in the prior art, a plurality of magnetic poles are formed, and thus the thickness of the speaker is increased by a multiple of the diaphragm amplitude in proportion to an increase in the number of magnetic poles, thereby making it impossible to manufacture a slim speaker. In addition, there is a difficulty in manufacturing due to having a plurality of magnetic poles and a plurality of dampers.

In addition, in the case of manufacturing the rectangular speaker in the prior art, it is difficult to manufacture the rectangular speaker because it needs to add a separate reinforcing material for preventing deformation of the bobbin.

SUMMARY OF THE INVENTION An object of the present invention is to provide a speaker which prevents the breakage of the coil and the deterioration in sound quality caused by the fluctuation of horizontal movement of the lower part of the bobbin and the coil contacting the yoke.

Another object of the present invention is to provide a speaker that can be manufactured in a flat panel type suitable for a flat slim audio home appliance.

Still another object of the present invention is to provide a speaker capable of preventing deformation of the bobbin.

Still another object of the present invention is to provide a speaker that is easy to manufacture a rectangular slim speaker.

The speaker of the present invention for achieving the above object, the base frame; A diaphragm coupled to an upper portion of the base frame; A magnetic body coupled to the base frame, the yoke coupled to a lower portion of the base frame, a magnet fixed to the inside of the yoke, and a plate fixed to an upper side of a magnet opposite the yoke; A bobbin wound around its outer periphery and vertically drawn between an outer portion of the plate and an inner portion of the yoke from an upper portion of the magnetic body and coupled to the diaphragm; It is connected to the lower portion of the bobbin and the magnetic body, characterized in that it comprises a damper for preventing the lower deformation of the bobbin.

The damper may be connected to a lower portion of the bobbin and an outer circumference of the magnet accommodated in the bobbin.

In addition, the damper may be connected to a lower portion of the bobbin, an outer circumference of the magnet accommodated in the bobbin, and an inner circumference of the yoke.

One end of the damper may extend through the magnetic body to the outside of the magnetic body, and one end of the damper may be connected to another magnetic body or a structure fixed to the other magnetic body disposed outside the magnetic body.

The damper is made of an electrical conductor, characterized in that the end of the voice coil is connected to the damper.

In addition, the speaker is characterized by having a rectangular shape.

The yoke is characterized in that separated into two or more.

According to the present invention, the lower part of the bobbin is provided with a damper to prevent the bobbin from touching the permanent magnet, plate, or yoke while vibrating up and down, thereby preventing sound quality degradation and preventing damage to the voice coil.

In addition, the present invention is to secure the height of the speaker by fixing the upper part of the bobbin by the diaphragm and the dust cap, and the lower part by the damper to effectively prevent deformation of the bobbin.

In addition, the present invention eliminates the restriction on the diameter size of the bobbin by configuring the damper to be attached to the inside of the bobbin, thereby making it possible to construct a flat diaphragm even when a speaker having a large diameter is produced. Provides the effect of lowering the overall height of.

In addition, the present invention allows the damper to more certainly prevent deformation of the bobbin by supporting the bobbin on the inside and outside of the bobbin.

The speaker according to the present invention includes a base frame, a diaphragm coupled to an upper portion of the base frame, a magnetic body coupled to the base frame, a bobbin coupled to the diaphragm, a lower portion of the bobbin and a magnetic body connected to the lower portion of the bobbin. It includes a damper to prevent deformation.

The magnetic body includes a yoke coupled to the bottom of the base frame, a magnet fixed to the inside of the yoke, and a plate fixed to an upper side of the magnet opposite the yoke.

The bobbin is wound around the voice coil on the outer circumference, and is vertically drawn between the outer side of the plate and the inner side of the yoke, which are fixed to the magnet from the top of the magnetic body.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment]

In the speaker 100 of the first embodiment of the present invention, the damper 151 is coupled to the lower portion of the bobbin 152 to prevent the lower deformation of the bobbin 152 and to suppress the horizontal movement of the bobbin 152. Therefore, it has the technical characteristics to prevent the sound quality degradation of the speaker and to strengthen the durability.

1 is an exploded perspective view of a speaker according to a first embodiment of the present invention having the above-described technical features, FIG. 2 is a perspective view of the speaker of FIG. 1, FIG. 3 is a front view of the speaker of FIG. 1, and FIG. 4 is of FIG. 3. Fig. 1 is a cross-sectional view of the speaker of Fig. 1 taken along the line IV-IV.

 The speaker 100 according to the first embodiment of the present invention, as shown in FIG. 1, includes a lower yoke 111, a magnet 112, a plate 113, and an upper yoke 114. And a damper 151, a bobbin 152, a voice coil 153, an edge 154, a diaphragm 155, a dust cap 156, and a base frame 157. It includes.

The lower yoke 111 of the magnetic body 110 has a lower yoke edge 111b protruding perpendicularly to the outer circumference of the disc bottom plate 111a. The inner circumferential side of the lower yoke rim 111b has a stepped portion 111c recessed in the direction of the bottom plate 111a.

The magnet 112 is formed of a cylindrical magnet, the plate 113 is an area corresponding to the cross-sectional area of the magnet 112 to prevent the dispersion of magnetic flux generated by the magnet 112 and to form a magnetic path It is composed of a disk-shaped magnetic material having a.

The upper yoke 114 has an upper yoke through-hole 114a formed at a central portion thereof, and an upper yoke rim 114b protruding downward from the outer circumference of the bottom, and an inner circumferential bottom of the rim 114b protrudes. It has an upper yoke step portion 114c.

The damper 151 has a ring shape of a circular cross section in which a damper through hole 151a is formed in the center of the vibrating body 150.

The bobbin 152 has a structure of a cylindrical tube larger than the diameter of the cross section of the magnet 112 and smaller than the inner diameter of the upper yoke through-hole 114a of the upper yoke 114.

The diaphragm 155 has a cone-shaped structure in which a diaphragm through hole 155a is formed at the center thereof.

The voice coil 153, the edge 154, the dust cap 156, and the base frame 157 may be applied to all configurations known in the prior art, and thus a detailed description thereof will be omitted.

Referring to the coupling structure of the magnetic body 110 of the above-described configuration is as follows.

The magnet 112 is disposed at the upper center of the lower yoke 111. The plate 113 is disposed on the upper surface of the magnet 112. The bottom surface of the edge 114b of the upper yoke 114 is coupled to be in close contact with the upper surface of the edge 111b of the lower yoke 111.

Referring to the coupling structure of the vibrating body 150 of the above-described configuration is as follows.

The voice coil 153 is wound around the outer periphery of the bobbin 152, and the lower portion of the bobbin 152 is inserted into and fixed to the damper coupling hole 151a of the damper 151. The upper portion of the bobbin 152 is coupled to the diaphragm 155 through the diaphragm through hole 155a. The dust cap 156 is coupled to the diaphragm through hole 155a to which the upper portion of the bobbin 152 is coupled, and the outer circumference of the diaphragm 155 is fixed to the base frame 157 by an edge 154.

The magnetic body 110 and the vibrating body 150 are formed by combining the lower yoke stepped portion 111c and the upper yoke stepped portion 114c with the outer circumference of the damper 151 coupled to the lower outer circumference of the bobbin 152. It is fitted between the yoke coupling unit 130 and fixed, and the bottom of the base frame 157 is coupled to the speaker 100 by being coupled to the upper outer periphery of the upper yoke 114.

As described above, the speaker 100 has an inner circumference of the damper 151 coupled to the lower portion of the bobbin 152, and an outer circumference of the damper 151 has a lower yoke step 113c and an upper yoke step 114c. It is easy to fix to the outer periphery of the damper 151 by being fitted between the yoke coupling portion 130 formed by coupling with each other, the fixing force is firm. This significantly improves the reliability of the lower deformation prevention of the bobbin 152.

In this embodiment, the fixing method of the outer periphery of the damper 151 is illustrated and described as being fixed by being fitted to the stepped portions of the upper yoke 114 and the lower yoke 111, but the fixing of the damper 151 is performed by the magnet 112. And, the plate 113, the yoke (111, 114) formed in the inner space consisting of the magnetic body can be combined and fixed to any shape that protrudes.

In addition, deformation of the upper portion of the bobbin 152 is suppressed by the diaphragm 155 and the dust cap 156. As a result, the deformation of the bobbin 152 is prevented, and the bobbin 152 is prevented from contacting the magnet 112, the plate 113, or the like.

Therefore, the speaker 100 is prevented from distortion of the reproduced sound, the sound quality is improved.

Second Embodiment

The speaker 200 of the second embodiment of the present invention may increase the diameter of the bobbin 252 by attaching and attaching the damper 251 to the lower inside of the bobbin 252 to prevent the lower deformation of the bobbin 252. As a result, a speaker 200 having a large diameter may be manufactured, and the upper diaphragm 255 may be manufactured as an integrated flat plate to lower the height of the speaker 200.

5 is a perspective view of the speaker 200, FIG. 6 is a front view of the speaker 200 of FIG. 5, and FIG. 7 is a sectional view of the speaker 200 of FIG. 5 taken along the line VII-VII of FIG. 6. Drawing.

5 to 7, the speaker 200 includes a magnetic body 210 including a yoke 211, a magnet 212, and a plate 213, a damper 251, a bobbin 252, and an edge ( 254, a vibrating plate 250 including a diaphragm 255 and a base frame 257.

The speaker of the first embodiment except that the configuration of the yoke 211, the magnet 212, the plate 213, the diaphragm 255, and the dust cap are not provided among the components of the speaker 200 of the second embodiment. Each structure of 100 has the same or similar structure. Therefore, detailed description of the same configuration as that of the speaker 100 of the first embodiment will be omitted, and features of each configuration will be described with respect to the other configuration of the second embodiment.

In the configuration of the speaker 200 according to the second embodiment, the yoke 211 is formed of one yoke 211 in which the lower yoke 111 and the upper yoke 114 of the first embodiment are integrally coupled.

The magnet 212 is formed in a cylindrical shape.

The plate 213 has a through hole formed at the center thereof, and has an outer circumference protruding in the outward direction of the outer circumferential surface of the magnet 212 to have a diameter larger than the outer diameter of the magnet 212 to form the protrusion 213a.

The diaphragm 255 is formed as an integral flat plate in which a diaphragm through hole is not formed at the center thereof.

The coupling structure of the speaker 200 having such a configuration is as follows.

The magnet 212 is disposed at the inner center of the yoke 211, and the plate 213 is disposed on the magnet 212.

The bobbin 252 wound with the voice coil 253 is inserted into and coupled to the outer circumference of the magnet 212 and the plate 213, and the upper portion thereof is coupled to the bottom surface of the diaphragm 255.

The damper 251 has an outer circumference of the damper 251 is coupled to the lower inner circumferential surface of the bobbin 252, the inner circumference of the damper through hole 251a of the damper 251 is coupled to the outer circumferential surface of the magnet 212 The bobbin 252 is supported to prevent the bottom deformation of the bobbin 252 inside the bottom of 252.

The diaphragm 255 is formed in a disk shape in which a diaphragm through hole is not formed in the center thereof, and thus the diaphragm 255 is in close contact with the upper portion of the bobbin 252 and the outer circumference thereof is fixed to the base frame 257 through the edge 254.

At this time, the coupling position of the inner circumference of the damper through-hole 251a of the damper 251 is not limited by the drawings and the description above, and any type of coupling within the magnetic body 210 is possible.

In addition, although not shown in the drawings, the magnet 212 may be configured to be separated into an upper magnet and a lower magnet, and then the inner circumference of the damper 251 may be inserted and fixed between the coupling portions of the magnet 212.

In the speaker 200 of the second embodiment having such a configuration, the lower inner circumferential surface of the bobbin 252 is coupled to the outer circumference of the damper 251, thereby increasing the diameter of the bobbin 252 without increasing the diameter of the yoke 211. Do it.

When the diameter of the bobbin 252 is increased, the support area with the bottom surface of the diaphragm 255 increases, so that even if the weight of the diaphragm 255 increases, the diaphragm 255 does not bend or deform, and thus the diaphragm 255 ), As shown in Figure 5, so that it can be configured as a flat plate, such as an integral circular plate or a rectangular plate in which the diaphragm through-hole is not formed in the center surface.

Therefore, the speaker 200 prevents the size of the yoke 211 by placing the damper 251 inside the bottom of the bobbin 252 and supporting the bottom of the bobbin 252. Accordingly, when the inner diameter of the bobbin is increased in the speaker of the related art, the size of the yoke is also increased, thereby improving the problem of increasing the volume and weight of the speaker.

In addition, the upper diaphragm 255 of the bobbin 252 can be manufactured in a flat plate shape with a large diameter, so that the overall height of the speaker 200 can be significantly reduced compared to the speaker of the prior art having the same output. Accordingly, since the diaphragm 255 is larger than the conventional speaker having the same size, the output is increased and the reproduction sound quality is remarkably improved as compared with the speaker of the same size.

Third Embodiment

The speaker 300 of the third embodiment of the present invention is configured such that the damper can simultaneously support the lower outer circumferential surface and the inner circumferential surface of the bobbin. Accordingly, when a large speaker is manufactured, a damper provided at one of the inner direction or the outer direction of the bobbin is very effective in suppressing the deformation when it is insufficient to suppress the deformation of the bobbin.

8 is a perspective view of the speaker, FIG. 9 is a front view of the speaker of FIG. 8, and FIG. 10 is a cross-sectional view of the speaker of FIG. 8 taken along line X-X of FIG. 9.

As shown in FIG. 8, the speaker 300 includes a magnetic body 310 including a yoke 311, a magnet 312, and a plate 313, a damper 351, a bobbin 352, a voice coil 353, The vibrating body 350 includes an edge 354, a diaphragm 355, and a base frame 357.

As shown in FIG. 8, unlike the configuration of the speaker 200 according to the second embodiment, the damper coupling part 351b to which the bottom surface of the lower edge of the bobbin 352 is attached is attached to the upper surface of the damper 351. Is formed.

In the speaker 300 having the above configuration, unlike the speaker 200 of the second embodiment, the plate 313 is coupled to the upper portion of the magnet 312 to have the protrusion 313a. The magnet 312 coupled to the upper plate 313 is inserted into the damper through hole 351a, and the inner circumference of the damper through hole 351a is fixedly coupled to the outer circumferential surface of the magnet 312. The outer circumference of the damper 351 is fixedly coupled to the inner circumferential surface of the yoke 311. The bottom surface of the lower edge of the bobbin 352 is tightly fixed to the damper coupling portion 351b.

The damper 351 may be divided into an outer damper 351 ′ and an inner damper 351 ″ in which regions are separated along the damper coupling part 351 b as shown in FIG. 10.

The speaker 300 having the above-described structure effectively prevents any deformation in the inner direction or the outer direction of the bobbin 352. Accordingly, when the diameter of the bobbin 352 increases in the related art, when only one damper is fixed to the inside or the outside of the bobbin 352, a problem of failing to effectively prevent deformation of the bobbin 352 may be solved, thereby manufacturing a large speaker. And the sound quality is significantly improved.

In FIG. 8, the magnet 312 and the plate 313 are illustrated as cylinders and circular plates. However, the magnet 312 and the plate 313 may be configured as cylindrical and ring-shaped circular plates as in the second embodiment.

In the speaker 300 of FIGS. 8 to 10, the yoke 311, the bobbin 352, the voice coil 353, the edge 354, the diaphragm 355, and the base frame 357 are the speaker 200 of the second embodiment. The same configuration as)) and the detailed description thereof will be omitted.

Fourth Embodiment

The fourth embodiment of the present invention discloses a rectangular speaker 400 that is applied when manufacturing a rectangular speaker 400 installed on a bottom surface having a narrow width such as a flat-panel TV.

11 is a perspective view of the rectangular speaker 400, FIG. 12 is a right side view of the speaker 400 of FIG. 11, and FIG. 13 is a cross-sectional view of the speaker 400 of FIG. 11 taken along a line XIII-XIII of FIG. 12. 14 is a diagram illustrating a partially enlarged view of portion K of FIG. 13.

11 to 14, the speaker 400, the lower yoke 411, the magnet 412, the plate 413 and the upper yoke 414 forming a magnetic body 410 are all composed of a rectangle, The damper 451, the bobbin 452, the edge 454, the diaphragm 455, and the base frame 457 constituting the vibrating body 450 are also rectangular.

In the speaker 400 having such a configuration, the damper 451 is fixed to the inner circumference of the bobbin 452 at the inner circumference of the damper through hole 451 a as shown in FIG. 14, and the lower yoke 411 and the upper yoke 413 are fixed to each other. It is configured to be inserted and fixed between the coupling portion 430 is formed in close contact.

On the other hand, the damper 451, like the speaker 200 of the second embodiment, has a lower portion of the bobbin 452 in which the voice coil 453 is wound so that the magnet 412 is inserted into the damper through hole 451a. After being inserted inside, the outer circumference of the damper 451 is fixed to the inner circumferential surface of the bobbin 452, and the inner circumference of the damper through hole 451a is fixed to the outer circumferential surface of the magnet 412. It can be fixed inside.

In addition, the damper 451, like the speaker 300 of the third embodiment, the bottom edge of the lower edge of the bobbin 452 is fixed to the damper coupling portion formed on the upper surface of the damper 451, the damper 452 The inner circumference of the magnet 412 is fixedly attached to the outer circumferential surface, the outer circumference of the damper 451 is fixedly attached to the inner circumferential surface of the yoke (211, 311), or fitted into the coupling portion (130, 430), bobbin 452 It may be configured to simultaneously support the lower portion of the bobbin 452 on the outer surface and the inner surface of the bobbin 452.

[Example 5]

15 is a cross-sectional view of a speaker according to a fifth embodiment of the present invention.

As shown in FIG. 15, the speaker 500 includes a magnetic body 510 including a yoke 511, a magnet 512, and a plate 513, a damper 551, a bobbin 552, and a voice coil. And a vibrating body 550 including an edge 553, an edge 554, a diaphragm 555, and a base frame 557.

The damper 551 has a flat plate shape, and one end of the damper 551 passes through the magnetic body 510 and extends to the outside of the magnetic body 510, so that the damper 551 may be connected to another magnetic body disposed outside the magnetic body 510. It is connected to the fixed structure 560. The bottom edge of the lower edge of the bobbin 552 is fixedly attached to the damper coupling portion formed at the inner circumference of the damper 551.

Here, although not shown, one end of the damper 551 may be connected to another magnetic body disposed outside the magnetic body 510.

In the speaker 500 of FIG. 15, the bobbin 552, the voice coil 553, the edge 554, the diaphragm 555, and the base frame 557 have the same configuration as that of the speaker 400 of the fourth embodiment. Detailed description will be omitted.

In the above-described first to fifth embodiments of the present invention, the damper may be formed of an electrical conductor, and an end of the voice coil may be connected to the damper.

In addition, the speaker of the present invention may be configured by combining the characteristic configuration of the speaker (100, 200, 300, 400, 500) of the first to fifth embodiments.

And, although the speaker is shown and described in the rectangular and circular in the embodiment of the present invention, the shape of the speaker of the present invention may have a variety of forms without being limited thereto.

In addition, in the embodiment of the present invention, the yoke is illustrated and described as an integral type or separated into upper and lower portions, but the yoke is not limited thereto, and various separation configurations and shapes may be applied within the scope of the present invention.

In addition, the plate of the embodiment of the present invention is to prevent the magnetic force dispersion of the magnet, the configuration may be omitted depending on the shape of the magnet.

1 is an exploded perspective view of a speaker according to a first embodiment of the present invention;

2 is a perspective view of the speaker of FIG.

3 is a front view of the speaker of FIG. 1, FIG.

4 is a cross-sectional view of the speaker of FIG. 1 taken along line IV-IV of FIG. 3;

5 is a perspective view of a speaker according to a second embodiment of the present invention;

6 is a front view of the speaker of FIG. 5;

7 is a cross-sectional view of the speaker of FIG. 5 taken along the line VII-VII of FIG. 6;

8 is a perspective view of a speaker according to a third embodiment of the present invention;

9 is a front view of the speaker of FIG. 8;

10 is a cross-sectional view of the speaker of FIG. 8 taken along line X-X of FIG. 9;

11 is a perspective view of a rectangular speaker according to a fourth embodiment of the present invention;

12 is a right side view of the speaker of FIG. 11;

FIG. 13 is a cross-sectional view of the speaker of FIG. 11 taken along line XIII-XIII of FIG. 12;

14 is a partially enlarged view of a portion K of FIG. 13;

15 is a cross-sectional view of a speaker according to a fifth embodiment of the present invention.

＊ Description of symbols for main parts of the drawings ＊

111,411: Lower yoke 112,212,312,412,512: Magnet

113,213,313,413,513: Plate 114,414: Upper yoke

151,251,351,451,551: Damper 152,252,352,452,552: Bobbin

153,253,353,453,553: Voice coil 155,255,355,455,555: Diaphragm

157,257,357,457,557: Base frame 211,311,511: York

Claims (7)

A base frame; A diaphragm coupled to an upper portion of the base frame; A magnetic body coupled to the base frame, the yoke coupled to a lower portion of the base frame, a magnet fixed to the inside of the yoke, and a plate fixed to an upper side of a magnet opposite the yoke; A bobbin wound around its outer periphery and vertically drawn between an outer portion of the plate and an inner portion of the yoke from an upper portion of the magnetic body and coupled to the diaphragm; And a damper connected to a lower portion of the bobbin and the magnetic body to prevent the lower deformation of the bobbin. The method of claim 1, And the damper is connected to a lower portion of the bobbin and an outer circumference of the magnet accommodated in the bobbin. The method of claim 1, And the damper is connected to a lower portion of the bobbin, an outer circumference of the magnet accommodated in the bobbin, and an inner circumference of the yoke. The method of claim 1, One end of the damper passes through the magnetic body and extends to the outside of the magnetic body, and one end of the damper is connected to another magnetic body or a structure fixed to the other magnetic body disposed outside the magnetic body. Speaker. The method of claim 4, wherein The damper is made of an electrical conductor, characterized in that the end of the voice coil is connected to the damper. 6. The method according to any one of claims 1 to 5, A speaker having a rectangular shape. The method of claim 6, The yoke is separated into two or more speakers.

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