KR20080085467A

KR20080085467A - Speaker

Info

Publication number: KR20080085467A
Application number: KR1020070027062A
Authority: KR
Inventors: 이재민
Original assignee: 에스텍 주식회사
Priority date: 2007-03-20
Filing date: 2007-03-20
Publication date: 2008-09-24

Abstract

A speaker is provided to improve a sound quality by having a first vibration plate and a second vibration plate which form an air layer and have a predetermined interval. A speaker includes a frame(110), a magnetic circuit unit(120), a vibration unit(130), and a weight ring(140). The frame has a coupling hole. The magnetic circuit unit includes a first magnet(123), a second magnet(125), a pole piece(127), and a plate(129). The yoke is coupled to the coupling hole. The first magnet is coupled to an upper plane of the yoke. The second magnet is coupled to an upper plane of the yoke to cover the first magnet. The pole piece is coupled to an upper plane of the first magnet and the second magnet. The magnetic circuit unit generates a magnetic force. The vibration unit has a first vibration plate(131), a second vibration plate(133), and a voice coil(135). An outer circumference plane of the first vibration plate is coupled to the frame. The second vibration plate is located on an upper part of the first vibration plate, and has an interval from the vibration plate. An outer circumference plane of the second vibration plate is coupled to the frame. The second vibration plate is located on an upper part between the pole piece and the plate. A lower part of the voice coil is located between the pole piece and the plate. An upper part of the voice coil is coupled to a connection part of the first vibration plate and the second vibration plate. The voice coil vibrates the first and second vibration plates if a power is supplied. The weight ring is coupled to a part of the first vibration plate coupled to the voice coil.

Description

Speaker {SPEAKER}

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

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

3 to 5 are cross-sectional views of the speakers according to the second to fourth embodiments of the present invention.

Explanation of symbols on the main parts of the drawings

110 frame 120 magnetic circuit part

130: vibration portion 140: weight ring

The present invention relates to a speaker.

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

Today, with the slimming of electronic products such as mobile phones, the speakers installed therein are also required to be slimmer. Accordingly, the shape of the speaker is changing from a circular shape to an oval or a track that can be slimmed.

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

As shown in FIG. 1, the conventional micro speaker is provided with a magnetic circuit unit 20 and a vibration unit 30, respectively, on the bottom and the inside of the frame 10.

The magnetic circuit unit 20 is a pole piece coupled to the yoke 21 and the first and second magnets 23a and 23b and the first and second magnets 23a and 23b respectively coupled to the yoke 21. Piece 25 and plate 26. In addition, the vibrator 30 has a diaphragm 31 having an outer circumferential surface side coupled to the diaphragm 31, and an upper side thereof coupled to the diaphragm 31, and a lower side having a voice coil 33 positioned inside the magnetic circuit unit 20. .

Thus, when power is applied to the voice coil 33, the vibration plate 31 vibrates in the vertical direction due to the action of the electric field generated in the voice coil 33 and the magnetic field generated in the magnetic circuit unit 20. Vibrate to play sound.

However, since the conventional speaker as described above is manufactured in an elliptical or track shape that can be slimmed, there is a limitation in the length of the short axis of the diaphragm 31. As a result, the lowest resonant frequency of the diaphragm 31 rises, which limits the reproduction of high quality sound. In order to reproduce the high quality sound, the thickness of the diaphragm 31 may be reduced. However, in this case, problems such as split resonance of the diaphragm 31 occur, and there is another limitation in reproducing the high quality sound.

A "micro speaker with a double diaphragm structure" that solves the above disadvantages is disclosed in Korean Patent Publication No. 2006-93412.

The micro speaker having a double diaphragm structure overlaps the first vibrating plate 220-1 and the second diaphragm 220-2 having different thicknesses and materials to form a double structure, and the first diaphragm 220-1. The air layer divided between the second diaphragms 220-2 is formed to improve sound quality.

However, the "micro-speaker having a double diaphragm structure" has a small amplitude of the first diaphragm 220-1 and the second diaphragm 220-2, so that the sound quality in the low range may be degraded.

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

A speaker according to the present invention for achieving the above object is a frame formed with a coupling hole; Yoke coupled to the coupling hole, the first magnet coupled to the upper surface of the yoke and the second magnet coupled to the upper surface of the yoke in a form surrounding the first magnet, the first magnet and the second magnet on the upper surface A magnetic circuit unit having magnetic poles and plates coupled thereto to generate magnetic force; The outer circumferential surface side is located on the first diaphragm coupled to the frame, the upper side of the first diaphragm, and the outer circumferential surface side is coupled to the frame and forms an air layer at intervals with the first diaphragm and between the pole piece and the plate. The upper part is a second diaphragm coupled to the first diaphragm, the lower side is located between the pole piece and the plate, and the upper side is coupled to a portion where the first diaphragm and the second diaphragm are coupled to supply power. A vibration unit having a voice coil which vibrates the first and second diaphragms while vibrating by the action of the magnetic circuit unit; And a weight ring coupled to a portion of the first diaphragm to which the voice coil is coupled.

In addition, the speaker according to the present invention for achieving the above object, the frame is formed with a coupling hole; Yoke coupled to the coupling hole, the first magnet coupled to the upper surface of the yoke and the second magnet coupled to the upper surface of the yoke in a form surrounding the first magnet, the first magnet and the second magnet on the upper surface A magnetic circuit unit having magnetic poles and plates coupled thereto to generate magnetic force; The first diaphragm coupled to the frame, the outer peripheral surface side is located on the upper side of the first diaphragm, the outer diaphragm side is coupled to the frame and the second diaphragm to form an air layer while being spaced apart from the first diaphragm, the lower side is the pole A vibration unit positioned between a piece and the plate and having an upper side coupled to the first diaphragm to vibrate the first and second diaphragms while vibrating by the action of the magnetic circuit unit when power is supplied; And a weight ring positioned between the first diaphragm and the second diaphragm above the voice coil and coupled to the first diaphragm and the second diaphragm.

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

2 is a cross-sectional view of a speaker according to a first embodiment of the present invention.

As shown, the frame 110 is provided with a coupling hole 111 in the center. The magnetic circuit part 120 generating the magnetic force is installed on the inner circumferential surface of the coupling hole 111, and the vibration part 130 is installed above the magnetic circuit part 120.

The magnetic circuit unit 120 has a yoke 121 coupled to the inner circumferential surface of the coupling hole 111, and a yoke in a form to surround the circular first magnet 123 and the first magnet 123 coupled to the upper surface of the yoke 121. The first magnet 123 and the second magnet 125 are provided in a shape corresponding to the ring-shaped second magnet 125, the first magnet 123, and the second magnet 125 coupled to the upper surface of the 121. Pole pieces (127) and plate (129) are respectively coupled to the upper surface of the. At this time, the outer circumferential surface of the first magnet 123 and the inner circumferential surface of the second magnet 125 have a predetermined interval, and the outer circumferential surface of the pole piece 127 and the inner circumferential surface of the plate 129 have a predetermined interval.

The vibrator 130 has a first diaphragm 131, a second diaphragm 133, and a voice coil 135. The first diaphragm 131 is coupled to the outer circumferential surface side of the frame 110, and the second diaphragm 133 is positioned above the first diaphragm 131 to have a predetermined distance from the first diaphragm 131, and the outer circumferential surface side thereof is It is coupled to the frame 110. In this case, an air layer is formed between the first diaphragm 131 and the second diaphragm 133, and the first diaphragm 131 and the second diaphragm 133 are positioned between the pole piece 127 and the plate 129. ) Sites are joined together.

The voice coil 135 has a lower side located between the pole piece 127 and the plate 129 and the upper side is coupled to a portion of the second diaphragm 131 coupled to the second diaphragm 132.

Thus, when external power is supplied to the voice coil 135, the voice coil 135 is vibrated in the vertical direction by the electric force generated in the voice coil 135 and the magnetic force generated in the magnetic circuit unit 120 and the first and The second diaphragms 131 and 133 are vibrated. Then, the first and second diaphragms 131 and 133 vibrate in a vertical direction to reproduce sound.

In the speaker according to the present exemplary embodiment, since the abnormal vibration generated when the first diaphragm 131 vibrates is uniformly spread by the damping action of the air layer formed between the second diaphragm 133, the split vibration It is suppressed and high quality sound is reproduced.

The slimmer speaker may have a low amplitude of the diaphragm, so that the sound quality in the low range may be degraded. The speaker according to the present embodiment includes a voice coil 135 coupled to the first and second diaphragms 131 and 133 to increase the amplitude of the first and second diaphragms 131 and 133. The weight ring 140 is coupled to portions of the first and second diaphragms 131 and 133. As a result, the amplitudes of the first and second diaphragms 131 and 133 are increased, so that the sound quality in the low range is improved.

Reference numeral 150 is a cover.

3 to 4 are cross-sectional views of the speakers according to the second to fourth embodiments of the present invention, and only the differences from FIG. 2 will be described.

In the speaker illustrated in FIG. 2, the first diaphragm 131 and the second diaphragm 133 are disposed in the same direction, and in the speaker illustrated in FIG. 3, the first diaphragm 231 and the second diaphragm 233 are opposite to each other. It is arranged in the direction.

In the speaker illustrated in FIG. 4, a second diaphragm 333 is installed on the upper side of the first diaphragm 331 in the same direction as the first diaphragm 331 to form an air layer at a distance from the first diaphragm 331. . The weight ring 340 is installed between the first diaphragm 331 and the second diaphragm 333 on the upper side of the voice coil 235. At this time, the weight ring 340 is coupled to the first vibration plate 331 and the second vibration plate 333 also serves to couple the first vibration plate 331 and the second vibration plate 333 to each other.

In the speaker illustrated in FIG. 5, the first diaphragm 431 and the second diaphragm 433 are disposed in opposite directions, and the other configurations are the same as those of FIG. 4.

As described above, the speaker according to the present invention is provided with a first diaphragm and a second diaphragm which form an air layer with a predetermined interval therebetween, so that sound quality is improved. In particular, since a weight ring for increasing the amplitude is provided between the engaging portion or between the first diaphragm and the second diaphragm, the sound quality in the low range is also improved.

In the above, the present invention has been described in accordance with one embodiment of the present invention, but those skilled in the art to which the present invention pertains have been changed and modified without departing from the spirit of the present invention. Of course.

Claims

A frame in which a coupling hole is formed;

Yoke coupled to the coupling hole, the first magnet coupled to the upper surface of the yoke and the second magnet coupled to the upper surface of the yoke in a form surrounding the first magnet, the first magnet and the second magnet on the upper surface A magnetic circuit unit having magnetic poles and plates coupled thereto to generate magnetic force;

The outer circumferential surface side is located on the first diaphragm coupled to the frame, the upper side of the first diaphragm, and the outer circumferential surface side is coupled to the frame and forms an air layer at intervals with the first diaphragm and between the pole piece and the plate. The upper part is a second diaphragm coupled to the first diaphragm, the lower side is located between the pole piece and the plate, and the upper side is coupled to a portion where the first diaphragm and the second diaphragm are coupled to supply power. A vibration unit having a voice coil which vibrates the first and second diaphragms while vibrating by the action of the magnetic circuit unit;

And a weight ring coupled to a portion of the first diaphragm to which the voice coil is coupled.

A frame in which a coupling hole is formed;

Yoke coupled to the coupling hole, the first magnet coupled to the upper surface of the yoke and the second magnet coupled to the upper surface of the yoke in a form surrounding the first magnet, the first magnet and the upper surface of the second magnet A magnetic circuit portion having a pole piece and a plate respectively coupled to the magnetic circuit to generate a magnetic force;

The first diaphragm coupled to the frame, the outer peripheral surface side is located on the upper side of the first diaphragm, the outer diaphragm side is coupled to the frame and the second diaphragm to form an air layer while being spaced apart from the first diaphragm, the lower side is the pole A vibration unit positioned between a piece and the plate and having an upper side coupled to the first diaphragm to vibrate the first and second diaphragms while vibrating by the action of the magnetic circuit unit when power is supplied;

And a weight ring positioned between the first diaphragm and the second diaphragm above the voice coil and coupled to the first diaphragm and the second diaphragm.

The method according to claim 1 or 2,

And the first diaphragm and the second diaphragm are arranged in the same direction.

The method according to claim 1 or 2,

And the first diaphragm and the second diaphragm are arranged in opposite directions.