KR20210152666A - The exciter - Google Patents

Abstract

The present invention relates to an exciter which comprises: an excitation module which generates sound by excitation with a panel, and includes a voice coil; a magnetic circuit module which includes a magnet for forming a magnetic field in the voice coil; a damper which supports the vibration of the excitation module; and a yoke which supports the magnetic circuit module, and is connected to the frame spaced apart from the panel. High heat generated from a voice coil unit can be effectively dissipated.

Description

Exciter {THE EXCITER}

The present invention relates to an exciter, and more particularly, to an exciter having improved heat dissipation performance for dissipating heat generated from a voice coil.

An exciter is a speaker that excites an adherend by vibrating by electromagnetic interaction between a magnetic circuit module and a voice coil. In the case of the exciter according to the prior art, the magnetic circuit module includes an injection molded frame and a yoke connected thereto. A magnet is disposed on the yoke. The voice coil disposed in the magnetic gap formed by the magnetic circuit module vibrates according to the power source.

When power is continuously applied to the voice coil, the voice coil is heated to a high temperature of about 200 degrees Celsius. Exciter according to the prior art includes a yoke and an injection molded frame for fixing the yoke. Here, the plastic frame has a problem of deterioration in sound quality due to deterioration when continuously exposed to high temperatures. In addition, since plastic is soft, there is a problem of deterioration (distortion) in sound quality due to vibration loss. According to the prior art, there is a problem of thermal dissipation due to high temperature.

An embodiment of the present invention aims to provide an exciter having improved heat dissipation performance for dissipating high heat generated from a voice coil.

In order to achieve the above object, an exciter according to an embodiment of the present invention includes an excitation module that generates sound by excitation with a panel, an excitation module including a voice coil, and a magnet that forms a magnetic field in the voice coil A magnetic circuit module, a damper for supporting vibration of the excitation module, and a yoke for supporting the magnetic circuit module and connected to a frame spaced apart from the panel.

According to the present invention, the high heat of the voice coil and the magnetic circuit module can be effectively dissipated through the yoke, thereby preventing deterioration of sound quality, etc. and improving sound quality.

In addition, since the metal yoke itself is fixed, vibration loss due to a soft material such as plastic is prevented.

In addition, since the heat dissipation plate has a structure for concentrating the magnetic field, sufficient driving force can be secured.

In addition, it is possible to reduce the assembly man-hours and processing costs compared to the conventional plastic frame and metal yoke.

1 is a perspective view schematically illustrating an exciter according to an embodiment of the present invention.
FIG. 2 is a perspective view of a lower surface of the exciter shown in FIG. 1 .
3 is an enlarged view of A in FIG. 1 .
FIG. 4 is a view schematically illustrating a cross-section of the exciter shown in FIG. 1 .

Hereinafter, the exciter 1 according to an embodiment of the present invention will be described with reference to the drawings. The exciter may also be referred to as an oscillator or an actuator.

1 is a perspective view schematically showing an exciter 1 according to an embodiment of the present invention, FIG. 2 is a perspective view looking at the lower surface of the exciter 1 shown in FIG. 1 , and FIG. 3 is in FIG. It is an enlarged view of A, and FIG. 4 is a view schematically showing a cross section of the exciter 1 shown in FIG.

1 to 4 , the exciter 1 according to an embodiment of the present invention has an excitation module 10 and a magnetic circuit module 20 to improve the performance of dissipating high heat generated in the voice coil 100 . ), a damper 30 and a yoke 40 .

The excitation module 10 generates sound by excitation of the panel P. The magnetic circuit module 20 forms a magnetic field. The excitation module 10 may vibrate according to Fleming's left hand rule by the magnetic field formed by the magnetic circuit module 20 . The damper 30 supports the vibration of the excitation module 10 . As a result, the vibrating module 10 vibrates in the oscillation axis direction, and vibration distortion does not occur in the direction intersecting the oscillation axis. The yoke 40 supports the magnetic circuit module 20 and is connected to the frame F spaced apart from the panel P.

The magnetic circuit module 20 includes a magnet 200 for forming a magnetic field. The excitation module 10 includes a voice coil 100 that is exposed to a magnetic field and vibrates along an oscillation axis. One side of the damper 30 is connected to the yoke 40 , and the other side is connected to the excitation module 10 . The magnet 200 may have a circular or polygonal shape on a plane.

In an embodiment, the yoke 40 may include a bottom portion 400 , a side wall portion 410 , and a flange portion 420 . The bottom 400 supports the magnet 200 . The bottom 400 may have a shape corresponding to the shape of the magnet 200 . Also, the bottom 400 may have a flat plate shape. The side wall portion 410 is disposed at an edge of the bottom portion 400 . The side wall portion 410 extends in a direction perpendicular to the bottom portion 400 . The side wall part 410 may have a shape corresponding to the shape of the bottom part 400 in plan view. The flange portion 420 is disposed at an end of the side wall portion 410 . The flange portion 420 may be connected to a separate frame (F) spaced apart from the panel (P).

Here, the bottom part 400 , the side wall part 410 , and the flange part 420 may all be made of the same material. In particular, the bottom portion 400, the side wall portion 410, and the flange portion 420 may be made of the same metal. Accordingly, the heat generated in the voice coil 100 may be dissipated through the entire yoke 30 . Specifically, the heat generated in the voice coil 100 may be heat transferred to the first route passing through the magnet 200 and the bottom 400 to be radiated. In addition, the heat generated in the voice coil 100 may be transferred to the second route through the side wall portion 410 and the flange portion 420 to be dissipated. That is, according to the present invention, heat dissipation performance is improved to prevent thermal damage. In addition, since the bottom part 400, the side wall part 410, and the flange part 420 are all metal, it is more rigid than the conventional plastic frame. That is, vibration degradation is reduced compared to the conventional plastic frame, so that sound quality can be improved.

The flange part 420 may include an extension plate 421 and a fastening plate 422 . The extension plate 421 extends in a direction away from the side wall portion 410 . The extension plate 421 supports one side of the damper 30 . That is, one side of the damper 30 is connected to the extension plate 421 , and the other side is connected to a bobbin 120 to be described later. The fastening plate 422 is disposed on the edge of the extension plate 421 . The fastening plate 422 has a fastener (H) connected to the frame (F).

The extension plate 421 surrounds the edge of the voice coil 100 . A plurality of fastening plates 422 are disposed. The plurality of fastening plates 422 may be arranged at equal intervals along the circumferential direction with respect to the voice coil 100 . As an embodiment, the pair of fastening plates 422 may be disposed to face each other with the voice coil 100 interposed therebetween. Heat dissipation performance may be adjusted according to the shape and size of the extension plate 421 . In addition, the extension plate 421 may change the fastening position (shape) between the yoke 40 and the frame F by adjusting the distance between the plurality of fastening plates 422 .

The excitation module 10 may further include a coupler 110 and a bobbin 120 . The coupler 110 is connected to the upper end of the bobbin 120 . The coupler 110 may be attached to the panel P by an adhesive member 60 . The upper end of the bobbin 120 is connected to the coupler 110 , and the lower end is coupled to the voice coil 100 . The voice coil 100 is wound around the bobbin 120 . In one embodiment, the excitation module 10 may extend in the circumferential direction with respect to the vibration axis. The magnetic circuit module 20 may further include a pole piece 210 . The pole piece 210 is disposed on the magnet 200 . The pole piece 210 concentrates the magnetic field to the top of the magnet 200 . Meanwhile, the bottom part 400 concentrates the magnetic field to the lower part of the magnet 200 .

The exciter 1 according to an embodiment of the present invention may further include a lug supporter 50 . The lug supporter 50 is disposed on one surface of the yoke 40 to insulate it from the yoke 40 . The lug supporter 50 may be made of a plastic material. Meanwhile, the yoke 40 includes a terminal 430 electrically connected to the voice coil 100 and a through hole 440 for installing the terminal 430 . The through hole 440 may be disposed in the extension plate 421 . The terminal 430 may be inserted into the through hole 440 to vertically penetrate the extension plate 421 .

The lug supporter 50 covers the lower surface of the yoke 40 and the inner surface defining the through hole 440 . Accordingly, the lug supporter 50 insulates an external wire (not shown) connected to the terminal 430 from the yoke 40 . A plurality of through holes 440 may be disposed on the extension plate 421 . Accordingly, a circuit for driving the voice coil 100 can be formed. The lug supporter 50 may be attached to the yoke 40 by an adhesive material.

In an embodiment, the lug supporter 50 may include an attachment plate 500 and a protrusion 510 . The attachment plate 500 is in surface contact with one surface (lower surface) of the yoke 40 . The protrusion 510 protrudes from the attachment plate 500 at the edge of the attachment plate 500 . The protrusion 510 may be insulated by preventing an external wire (not shown) from escaping to the outside of the attachment plate 500 . In addition, the lug supporter 50 may further include an auxiliary attachment plate 520 . The auxiliary attachment plate 520 is disposed to be in surface contact with the other surface (upper surface) of the yoke 40 . The auxiliary attachment plate 520 extends to surround the through hole 440 . Accordingly, the auxiliary attachment plate 520 may insulate between the terminal 430 or the tinsel wire (not shown) and the upper surface of the yoke 40 . The tinsel wire connects the terminal 430 and the voice coil 100 .

Although the invention made by the present inventors has been described in detail according to the above embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

1: Exciter
10: with module
100: voice coil
110: coupler
120: bobbin
20: magnetic circuit module
200: magnet
210: pole piece
30: damper
40: York
400: bottom
410: side wall
420: flange part
430: terminal
440: through hole
50: rug supporter
500: attachment plate
510: protrusion
520: auxiliary attachment plate
60: adhesive member

Claims (12)

an excitation module that generates sound by excitation with a panel and includes a voice coil;
a magnetic circuit module including a magnet for forming a magnetic field in the voice coil;
a damper for supporting the vibration of the excitation module; and
An exciter supporting a magnetic circuit module and comprising a yoke coupled to a frame spaced from the panel. The method of claim 1,
York is,
a bottom portion supporting the magnet;
a side wall portion disposed at an edge of the bottom portion and extending in a direction perpendicular to the bottom portion; and
An exciter disposed at an end of the side wall portion and including a flange portion connected to the frame. 3. The method of claim 2,
The bottom part, side wall part and flange part are made of the same metal exciter. 3. The method of claim 2,
Flange part,
an extension plate extending in a direction away from the side wall portion and supporting one side of the damper; and
An exciter comprising a fastening plate disposed on an edge of the extension plate and having a fastener connected to the frame. The method of claim 1,
It is disposed on one surface of the yoke, the exciter further comprising a lug supporter insulated from the yoke. 6. The method of claim 5,
York is,
a terminal electrically connected to the voice coil; and
Exciter with through-holes for installation of terminals. 7. The method of claim 6,
The lug supporter is an exciter that insulates the wire connected to the terminal by covering the lower surface of the yoke and the inner surface of the through hole. 5. The method of claim 4,
The extension plate surrounds the edge of the voice coil,
The plurality of fastening plates are an exciter arranged to face each other with a voice coil interposed therebetween. The method of claim 1,
The magnetic circuit module is an exciter further comprising a pole piece disposed on the magnet. The method of claim 1,
The module with
a coupler coupled to the panel;
Connected to the coupler, the exciter further comprising a bobbin coupled to the voice coil. 7. The method of claim 6,
The through hole is an exciter arranged in plurality on the extension plate. 6. The method of claim 5,
The rug supporter,
an attachment plate in surface contact with one surface of the yoke; and
An exciter comprising a protrusion protruding from the attachment plate at an edge of the attachment plate.

Images