KR20090022704A

KR20090022704A - Speaker

Info

Publication number: KR20090022704A
Application number: KR1020070088291A
Authority: KR
Inventors: 이동진
Original assignee: 에스텍 주식회사
Priority date: 2007-08-31
Filing date: 2007-08-31
Publication date: 2009-03-04

Abstract

A speaker is disclosed. Since the first magnet is coupled to the coupling protrusion of the frame and the speaker is integrally formed by injection, the speaker not only improves the coupling strength of the first magnet and the frame, but also facilitates the coupling process between the frame and the first magnet. In addition, since the magnetic member is provided to face the outer circumferential surface of the pole piece, the magnetic flux generated in the first and second magnets is concentrated between the pole piece and the magnetic member. As a result, the electromagnetic force for vibrating the vibrator portion is increased, thereby improving performance.

Description

Speaker {SPEAKER}

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

1B is an enlarged view of a portion “A” of FIG. 1A.

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

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

Explanation of symbols on the main parts of the drawings

110 frame 120 magnetic circuit part

121,125: 1st and 2nd magnet 123: pole piece

130: vibration unit 140: magnetic member

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.

FIG. 1A is a cross-sectional view of a conventional speaker, and FIG. 1B is an enlarged view of portion “A” of FIG. 1A, which will be described.

As shown, a case-shaped frame 10 is provided. The magnetic circuit unit 20 is installed inside the frame 11, and the vibration unit 30 is installed above the magnetic circuit unit 20.

The magnetic circuit unit 20 has a first magnet 21, a pole piece 23 and a second magnet 25, which are sequentially stacked inside the frame 11, and the vibrator 30 has a magnetic circuit unit (a lower side). The voice coil 31 and the outer circumferential side which are positioned between the frame 11 and the upper side of the magnetic circuit unit 20 are fixed to the frame 11 and the inner circumferential side thereof is coupled to the outer circumferential surface of the voice coil 31. Has 35.

Thus, when a current is applied to the voice coil 31, the voice coil 31 is vibrated up and down by the electromagnetic force generated between the voice coil 31 and the magnetic circuit portion 20, thereby causing the vibration plate 35 to vibrate While generating a sound wave in the air.

Since the conventional speaker as described above bonds the metal first magnet 21 to the frame 11 made of a synthetic resin, there is a weak coupling strength between the first magnet 21 and the frame 11.

In addition, after the first magnet 21 and the pole piece 23 are bonded to each other, the first magnet 21 is coupled to the frame 11, so that the manufacturing process is complicated.

In addition, the magnetic flux is not concentrated on the voice coil 31 located on the outer circumferential surface side of the pole piece 23, there is a disadvantage in that the performance is degraded because the magnetic flux is leaked a lot.

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 coupling strength of the magnet and the frame.

In addition, another object of the present invention is to provide a speaker that can not only simplify the manufacturing process, but also improve performance.

Speaker according to the present invention for achieving the above object, the frame formed with a protrusion protrusion; A magnetic circuit unit having a first surface coupled to the inner surface of the frame and the coupling protrusion, a pole piece coupled to the first magnet and the coupling protrusion, and a second magnet coupled to the pole piece, and generating magnetic force; One side has a voice coil positioned between the frame and the magnetic circuit portion, the outer peripheral surface side is coupled to the frame and the inner peripheral surface side has a diaphragm coupled to the other outer peripheral surface of the voice coil while generating sound while vibrating by the action of the magnetic circuit portion It includes a vibration unit.

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

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

As shown in the drawing, a frame 110 having a case shape with an open top plate is provided. The magnetic circuit unit 120 for generating a magnetic force is coupled to the inside of the frame 110, and a vibrating unit 130 for generating an electric force is installed at an upper side of the side plate of the frame 110.

The magnetic circuit unit 120 has a first magnet 121, a pole piece 125, and a second magnet 125. The first magnet 121 is provided in a disk shape and coupled to the upper surface of the lower plate of the frame 110, the pole piece 123 is provided in a disk shape and coupled to the top surface of the first magnet 121, the second magnet 125 Is provided in a disc shape and coupled to the upper surface of the pole piece 123. In this case, the first and second magnets 121 and 125 are made of neodymium.

The vibrator 130 has a voice coil 131, a diaphragm 133, an edge 135, and a damper 137.

The voice coil 131 has a lower side positioned between the frame 110 and the pole piece 123 and an upper side positioned above the second magnet 125. Thus, when external power is supplied to the voice coil 131, the voice coil 131 vibrates up and down by the electromagnetic force generated between the voice coil 131 and the magnetic circuit unit 120.

The diaphragm 133 is provided in a ring shape and the inner circumferential surface side thereof is coupled to the upper outer circumferential surface of the voice coil 131. The edge 135 is provided in a ring shape and the inner circumferential surface side is coupled to the outer circumferential surface side of the diaphragm 133, and the outer circumferential surface side is coupled to the side plate upper side of the frame 110. The diaphragm 133 and the edge 135 vibrate by the voice coil 131 to reproduce sound.

The damper 137 is provided in a ring shape and the outer circumferential surface side thereof is coupled to the frame 110, and the inner circumferential surface side thereof is coupled to the outer circumferential surface of the central portion side of the voice coil 131. The damper 137 prevents the voice coil 131 from flowing from side to side when the voice coil 131 vibrates to prevent the vibration plate 131 from flowing from side to side.

The frame 110 is molded by injection, and the first magnet 121 is made of metal. Therefore, when bonding the frame 110 and the first magnet 121 of different materials, the bonding strength is weak, there is a fear that the first magnet 121 is separated from the frame 110.

The speaker according to the present exemplary embodiment is provided to improve coupling strength between the frame 110 and the first magnet 121 and coupling strength between the first magnet 121 and the pole piece 123.

In detail, the coupling protrusion 112 protrudes from the center of the lower plate 110 of the frame 110. In addition, the first magnet 121 and the pole piece 123 are formed with coupling holes 121a and 123a through which the coupling protrusion 112 is press-coupled to each other. In this case, the first magnet 121 is integrally formed on the frame 110 to be injection molded, and the pole piece 123 is coupled to the first magnet 121 by bonding and simultaneously pressed into the coupling protrusion 112. Therefore, the coupling strength between the first magnet 121 and the pole piece 123 is improved.

The ring-shaped magnetic member 140 is coupled to a portion of the frame 110 that faces the outer circumferential surface of the pole piece 123. The magnetic member 140 is also formed integrally with the frame 110 to be injection molded. Then, the magnetic flux of the magnetic flux generated in the first and second magnets 121 and 125 is formed to flow into the magnetic member 140 through the pole piece 123, the magnetic flux is the outer peripheral surface of the pole piece 123 Are concentrated on the side. Therefore, the magnetic flux density between the pole piece 123 and the magnetic member 140 is increased to increase the electromagnetic force between the voice coil 131 and the magnetic circuit unit 120.

As described above, the speaker according to the present invention is formed integrally by the injection and at the same time the first magnet is coupled to the coupling projection of the frame, not only improve the coupling strength of the first magnet and the frame, but also the frame and the first magnet The bonding process is simple.

In addition, since the magnetic member is provided to face the outer circumferential surface of the pole piece, the magnetic flux generated in the first and second magnets is concentrated between the pole piece and the magnetic member. As a result, the electromagnetic force for vibrating the vibrator portion is increased, thereby improving performance.

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 the engaging protrusion protrudes;

A magnetic circuit unit having a first surface coupled to the inner surface of the frame and the coupling protrusion, a pole piece coupled to the first magnet and the coupling protrusion, and a second magnet coupled to the pole piece, and generating magnetic force;

One side has a voice coil positioned between the frame and the magnetic circuit portion, the outer peripheral surface side is coupled to the frame and the inner peripheral surface side has a diaphragm coupled to the other outer peripheral surface of the voice coil while generating sound while vibrating by the action of the magnetic circuit portion Speaker comprising a vibration unit.

The method of claim 1,

The first magnet and the pole piece, the speaker characterized in that the coupling hole is coupled to each of the coupling projections are formed.

The method according to claim 1 or 2,

And the first magnet is integrally formed with the frame which is injection molded.

The method according to claim 1 or 2,

A portion of the frame facing the outer circumferential surface of the pole piece is integrally formed with the frame in which a ring-shaped magnetic member is injection molded.

One side of the voice coil is located between the magnetic member and the pole piece.