KR20100126014A

KR20100126014A - Speaker

Info

Publication number: KR20100126014A
Application number: KR1020090045037A
Authority: KR
Inventors: 정창규
Original assignee: 에스텍 주식회사
Priority date: 2009-05-22
Filing date: 2009-05-22
Publication date: 2010-12-01

Abstract

A speaker is disclosed. Since the blocking member protrudes from the center portion of the diaphragm, sound waves generated by the vibration of the diaphragm are blocked by the blocking member and thus cannot be transmitted to the center portion of the diaphragm. Therefore, since interference of sound waves does not occur at the central portion side of the diaphragm, the sound quality in the mid range and the high range is improved. The magnetic circuit part and the terminal plate are integrally formed in the frame when the frame is ejected, or the magnetic circuit part is integrally formed in the blocking member when the blocking member is ejected, and the magnetic circuit part and the terminal plate are integrally formed in the frame when the frame is ejected. Therefore, the bonding process is simple.

Description

Speaker {SPEAKER}

The present invention relates to a speaker.

A speaker is an acoustic device that converts an electric signal into vibration of a diaphragm to generate a small density wave in the air to emit sound waves.

1 is a cross-sectional view of a conventional speaker, which will be described.

As shown, a frame 10 is provided. The lower surface of the frame 10 is coupled to the magnetic circuit portion 20 having the yoke 21, the magnet 23, and the pole piece 25, and the diaphragm 31 and the voice coil 33 inside the frame 10. It is provided with a vibration unit 30 that acts as a magnetic circuit unit 20 and generates sound while vibrating.

In the conventional speaker configured as described above, sound waves generated during the vibration of the diaphragm 31 overlap at the center portion of the diaphragm 31 that is the upper portion of the voice coil 33, and mutual offset and constructive interference occur. This has the disadvantage that the sound quality is lowered.

In addition, after the yoke 21 is integrally formed with the frame 10 when the frame 10 is ejected, the magnet 23 and the pole piece 25 are separately coupled to the yoke 21, and the frame 10 Since the terminal plate 40 is coupled separately, there is an inconvenience in that the coupling process is complicated.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention to provide a speaker that can improve the sound quality.

Another object of the present invention to provide a speaker that can be easily combined.

Speaker according to the present invention for achieving the above object, the frame; A magnetic circuit unit coupled to the frame and generating a magnetic force; One side is located inside the magnetic circuit portion and when the power is applied to the voice coil vibrating by working with the magnetic circuit portion, the outer peripheral surface side is supported by the frame and the inner peripheral surface side is coupled to the other outer peripheral surface of the voice coil and vibrating by the voice coil Vibration unit having a diaphragm for generating sound; A terminal plate integrally formed in the frame; Means for preventing interference of sound waves at the center of the diaphragm.

Since the blocking member protrudes from the center portion of the diaphragm according to the present invention, the sound wave generated by the vibration of the diaphragm is blocked by the blocking member and is not transmitted to the center portion of the diaphragm. Therefore, since interference of sound waves does not occur at the central portion side of the diaphragm, the sound quality in the mid range and the high range is improved.

The magnetic circuit part and the terminal plate are integrally formed in the frame when the frame is ejected, or the magnetic circuit part is integrally formed in the blocking member when the blocking member is ejected, and the magnetic circuit part and the terminal plate are integrally formed in the frame when the frame is ejected. Therefore, the bonding process is simple.

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

First embodiment

2A is a cross-sectional view of a speaker according to a first embodiment of the present invention, and FIG. 2B is an enlarged view of portion “A” of FIG. 2A.

As shown, a frame 110 having one surface open is provided.

Hereinafter, in referring to the plane and the direction of the other components including the frame 110, the plane and direction toward the vertical direction upward of the frame 110 "top and top", the plane and direction toward the vertical bottom " Lower surface and lower side ".

The upper surface of the frame 110 is open.

The magnetic circuit unit 120 for generating magnetic force is coupled to the inner lower surface of the frame 110, and the vibration unit 130 for generating sound while vibrating up and down is installed inside the frame 110 above the magnetic circuit unit 120. do.

The magnetic circuit unit 120 is formed in a “U” shape and the outer circumferential surface is coupled to the yoke 121 coupled to the inner circumferential surface of the frame 110, the magnet 123 coupled to the inner bottom surface of the yoke 121, and the magnet 123. It has a pole piece 125. In this case, a gap G is formed between the inner circumferential surface of the yoke 121, the outer circumferential surface of the magnet 123, and the inner circumferential surface of the yoke 121 and the outer circumferential surface of the pole piece 125, respectively.

The vibrator 130 has a voice coil 131, a diaphragm 133, and a damper 135.

The voice coil 131 is formed in a cylindrical shape, the lower side of which is located in the gap G of the magnetic circuit unit 120, and the upper side of which is located on the outer peripheral surface of the bobbin 131a and the lower side of the bobbin 131a located inside the frame 110. It has a wound coil 131b. When external power is applied to the coil 131b, the voice coil 131 vibrates up and down by the electromagnetic force generated between the coil 131b and the magnetic circuit unit 120.

The diaphragm 133 is formed in a cone shape, the outer circumferential surface side is coupled to the edge portion side of the frame 110, the inner circumferential surface side is coupled to the upper outer peripheral surface of the bobbin 131a. The diaphragm 133 vibrates by the voice coil 131 to generate sound.

The damper 135 is formed in a ring shape and the outer circumferential surface side is coupled to the frame 110 and the inner circumferential surface side is coupled to the central peripheral side outer peripheral surface of the bobbin 131a to prevent the voice coil 131 from flowing left and right. That is, the damper 135 supports the vibration of the voice coil 131 up and down.

One side of the frame 110 is integrally formed with a terminal plate 140 for transmitting the external power supply side to the coil 131b of the voice coil 131.

When the diaphragm 133 vibrates up and down by the voice coil 131, sound waves overlap each other at the central portion of the diaphragm 133 positioned above the voice coil 133, thereby causing offset and reinforcement interference.

The speaker according to the present embodiment is provided with means for preventing interference of sound waves at the center of the diaphragm 133.

In detail, the means is provided with a blocking member 115 protruding above the central portion of the diaphragm 133. The blocking member 115 is inserted into the magnetic circuit unit 120 and penetrates through the bobbin 131a of the voice coil 131 to protrude outward from the upper portion of the diaphragm 133. At this time, the blocking member 115 is formed in a shape of any one selected from cylindrical, elliptical and tetrahedral or more according to the characteristics required by the speaker.

Then, since the sound wave generated by the vibration of the diaphragm 133 is blocked by the blocking member 115 and is not transmitted to the center side of the diaphragm 133, the interference of the sound wave does not occur at the center side of the diaphragm 133. Therefore, the sound quality in the mid range and the high range is improved.

The frame 110 is molded by injection, and the blocking member 115 is integrally formed on the frame 110 together with the frame 110 at the time of injection of the frame 110.

In addition, when the frame 110 is ejected, the yoke 121, the magnet 123, and the pole piece 125 of the magnetic circuit unit 120 are integrally formed in the frame 110.

In detail, through holes 121a, 123a, and 125a are formed in the yoke 121, the magnet 123, and the pole piece 125, respectively, to communicate with each other.

When the yoke 121, the magnet 123, and the pole piece 125 are placed in a predetermined mold for forming the frame 110, and resin is injected into the mold, the frame 110 is formed on the outer circumferential surface and the lower surface of the yoke 121. ) Is integrally formed. Then, resin is injected into the through holes 121a, 123a, and 125a of the yoke 121, the magnet 123, and the pole piece 125 to form a blocking member 115.

At this time, the lower and upper portions of the blocking member 115 exposed to the lower side and the upper side of the through holes 121a, 123a and 125a are lower than the lower portion of the blocking member 115 inserted into the through holes 121a, 123a and 125a. It is formed to be large in contact with the yoke 121 and the pole piece 125, respectively. Therefore, the yoke 121, the magnet 123, and the pole piece 125 of the magnetic circuit unit 120 are integrally coupled to each other by the blocking member 115. The through holes 121a, 123a, 125a of the yoke 121, the magnet 123, and the pole piece 125 and the blocking member 115 are concentric with the yoke 121, the magnet 123, and the pole piece 125. Guide them to form and combine.

In order to firmly couple the frame 110 and the yoke 121, ring-shaped insertion grooves 110a and ring-shaped insertion frames 121b are inserted into the outer peripheral surfaces of the frame 110 and the yoke 121, respectively. Is formed.

The terminal plate 140 is integrally formed on the frame 110 when the frame 110 is ejected together with the magnetic circuit unit 120.

In the speaker according to the first embodiment of the present invention, since all the components of the magnetic circuit unit 120 and the terminal plate 140 are integrally formed on the frame 110 when the frame 110 is ejected, the coupling process is easy. .

Reference numeral 150 in FIG. 2 is a cap that prevents foreign matter from flowing into the voice coil 131.

Second embodiment

3 is a cross-sectional view of a speaker according to a second embodiment of the present invention, and describes only differences from the first embodiment.

As shown, the blocking member 215 is injection molded separately from the frame 210, and the yoke 221, the magnet 223, and the pole piece 225 of the magnetic circuit unit 220 are injected from the blocking member 215. It is formed integrally with the blocking member 215. In addition, only the outer circumferential surface of the yoke 221 of the magnetic circuit unit 220 is integrally formed on the frame 210 when the frame 210 is ejected.

In the speaker according to the second exemplary embodiment of the present invention, all of the components of the magnetic circuit unit 220 are integrally formed in the blocking member 215 when the blocking member 215 is ejected, and the magnetic circuit unit when the frame 210 is ejected. Since the yoke 221 and the terminal plate 240 of the 210 is integrally formed on the frame 210, the coupling process is easy.

Third Embodiment

4A is a cross-sectional view of a speaker according to a third embodiment of the present invention, and FIG. 4B is an enlarged view of a portion “B” of FIG. 4A and illustrates only differences from the first embodiment.

As shown, the frame 310 is molded by injection, the blocking member 315 is integrally formed on the frame 310 together with the frame 310 at the time of injection of the frame 310.

The magnetic circuit unit 320 includes a pole piece 321, a magnet 323, and a yoke 325, and is integrally formed with the frame 310 when the frame 310 is ejected.

In detail, the magnetic circuit unit 310 is formed in a ring shape and the outer circumferential surface is coupled to the frame 310, and the outer circumferential surface is coupled to the frame 310, and the upper surface is the pole piece 321. Magnet 323 in contact with the lower surface of the), formed in a ring shape, the outer peripheral surface is coupled to the frame 310, the upper surface in the center of the support plate 325a and the support plate 325a in contact with the lower surface of the magnet 323 And a yoke 325 having a pole 325b protruding to the magnet 323 and the pole piece 321.

A gap is formed between the outer circumferential surface of the pole 325b and the inner circumferential surface of the magnet 323 and the outer circumferential surface of the pole 325b and the outer circumferential surface of the pole piece 321, respectively, and a through hole 325bb is formed in the pole 325b.

Thus, when the pole piece 321, the magnet 323 and the yoke 325 are put into a predetermined mold for forming the frame 310, and resin is injected into the mold, the outer peripheral surface of the pole piece 321, the magnet ( The frame 310 is integrally formed on the outer circumferential surface of the 323 and the lower surface of the yoke 325. Then, resin is injected into the through hole 325bb of the pawl 325b of the yoke 325 to form the blocking member 315.

At this time, the lower end portion and the upper portion of the blocking member 315 exposed to the lower side and the upper side of the through hole 325bb are formed larger than the lower portion of the blocking member 315 inserted into the through hole 325bb. The lower surface and the upper surface contact each. Therefore, the magnetic circuit unit 320 is integrally coupled to each other and at the same time integrally coupled to the frame 310.

In order to firmly couple the frame 310 and the pole piece 321, ring-shaped insertion grooves 310a and ring-shaped insertion frames 321a are formed on the outer circumferential surfaces of the frame 310 and the pole piece, respectively. do. The frame 310 is provided with a support groove 310b in which the outer circumferential surface side of the magnet 323 is inserted and supported.

Fourth embodiment

5 is a cross-sectional view of a speaker according to a fourth embodiment of the present invention, and only the differences from the third embodiment will be described.

As shown, the blocking member 415 is injection molded separately from the frame 410, and the pole piece 421, the magnet 423, and the yoke 425 of the magnetic circuit unit 420 are injected from the blocking member 415. It is formed integrally with the blocking member 415 at the time. In addition, only the outer circumferential surface of the pole piece 421 of the magnetic circuit unit 420 is integrally formed with the frame 410 when the frame 410 is ejected.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Of course.

1 is a cross-sectional view of a conventional speaker.

2A is a sectional view of a speaker according to a first embodiment of the present invention;

2B is an enlarged view of a portion “A” of FIG. 2A.

3 is a sectional view of a speaker according to a second embodiment of the present invention;

4A is a sectional view of a speaker according to a third embodiment of the present invention;

4B is an enlarged view of a portion “B” of FIG. 4A.

5 is a cross-sectional view of a speaker according to a fourth embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

110 frame 120 magnetic circuit part

130: vibrating unit

Claims

frame;

A magnetic circuit unit coupled to the frame and generating a magnetic force;

One side is located inside the magnetic circuit portion and when the power is applied to the voice coil vibrating by working with the magnetic circuit portion, the outer peripheral surface side is supported by the frame and the inner peripheral surface side is coupled to the other outer peripheral surface of the voice coil and vibrating by the voice coil Vibration unit having a diaphragm for generating sound;

A terminal plate integrally formed in the frame;

And means for preventing interference of sound waves at the center of the diaphragm.

The method of claim 1,

And the means is a blocking member inserted into the magnetic circuit part and protruding out of the diaphragm through the voice coil.

The method of claim 2,

And the frame is formed by injection, and the blocking member is integrally formed on the frame together with the frame to be injected.

The method of claim 3, wherein

The magnetic circuit unit has a yoke coupled to the frame, the magnet and the pole piece sequentially positioned in the inside of the yoke and in contact with each other,

And the yoke, the magnet and the pole piece are integrally formed in the frame when the frame is ejected.

The method of claim 2,

And the frame and the blocking member are each molded by injection.

The method of claim 5,

And the yoke, the magnet and the pole piece are integrally formed with the blocking member when the blocking member is ejected.

The method of claim 6,

The yoke of the magnetic circuit unit is characterized in that the speaker is integrally formed on the frame when the frame is ejected.

The method according to claim 4 or 7,

Through-holes are respectively formed in the yoke, the magnet and the pole piece to communicate with each other.

One side of the blocking member is inserted into the through hole of the yoke, the through hole of the magnet and the through hole of the pole piece.

The method of claim 8,

One end portion and the other side portion of the blocking member exposed to the outside of the through hole is formed larger than the portion of the blocking member inserted into the through hole is characterized in that the contact with the yoke and the pole piece, respectively.

The method according to claim 4 or 7,

And a ring-shaped insertion frame and a ring-shaped insertion groove which are inserted into and coupled to the outer circumferential surface of the yoke and the frame, respectively.

The method of claim 3, wherein

The magnetic circuit portion is formed in a ring shape, the outer peripheral surface is formed in a pole piece, the outer peripheral surface is coupled to the frame, the outer peripheral surface is coupled to the frame, the magnet in contact with the pole piece is formed in a ring shape, the outer peripheral surface is coupled to the frame And a yoke having a support plate in contact with the magnet and a pole protruding from the central portion of the support plate and positioned within the magnet and the pole piece.

The method of claim 11,

The frame is characterized in that the speaker is characterized in that the support groove is formed is inserted into the outer peripheral surface side of the magnet.

The method of claim 5,

The magnetic circuit portion is formed in a ring shape, the outer peripheral surface is formed in a pole piece coupled to the frame, a ring shape, the magnet in contact with the pole piece, is formed in a ring shape and protrudes from the support plate and the central portion of the support plate in contact with the magnet And a yoke having a pole positioned inside the magnet and the pole piece,

The method of claim 13,

The pole piece of the magnetic circuit portion is characterized in that the speaker is integrally formed on the frame when the frame is ejected.

The method according to claim 11 or 14,

The through hole is formed in the pole of the yoke,

One side of the blocking member is inserted into the through hole of the yoke.

The method of claim 15,

One end portion and the other side portion of the blocking member exposed to the outside of the through hole is formed larger than the portion of the blocking member inserted into the through hole and the one end surface and the other end surface of the pawl; Speakers characterized in that each contact.

The method according to claim 11 or 14,

And a ring-shaped insertion frame and a ring-shaped insertion groove which are inserted into and coupled to the outer circumferential surface and the frame of the pole piece, respectively.

The method according to claim 3 or 5,

The blocking member is a speaker, characterized in that formed in the shape of any one selected from a cylindrical, oval and tetrahedral or more.

The method of claim 1,

And the terminal plate is integrally formed on the frame when the frame is ejected.