KR20230023168A - The exciter apparatus - Google Patents

Abstract

The present invention comprises a frame, a magnetic circuit module disposed in the frame and forming a magnetic gap, a voice coil disposed in the magnetic gap and oscillating along an oscillation axis, a coupler connected to the voice coil and coupled to a panel, and a heat sink disposed inside the magnetic circuit module. With this configuration, the deterioration and consequential thermal damage can be prevented.

Description

Exciter {THE EXCITER APPARATUS}

The present invention relates to an exciter, and more particularly, to an exciter with improved heat dissipation performance.

A speaker is an acoustic device that converts electrical signals into vibrations of a diaphragm and generates small dense waves in the air to radiate sound waves. The speaker includes a frame, a magnetic circuit part installed in the frame and generating a magnetic force, and a sound generator having a diaphragm installed in the frame and interacting with the magnetic circuit part to vibrate to reproduce sound.

Meanwhile, the panel excitation type exciter speaker is installed on the panel of the flat panel display device. The panel excitation type exciter speaker reproduces sound by vibrating the panel. As the panel vibrates and reproduces the sound, the three-dimensional effect of the sound is improved. The panel excitation type exciter speaker includes a yoke, magnet, voice coil and cap. A magnet is disposed on the yoke, a voice coil is disposed in a magnetic gap formed by the magnet, and the voice coil is connected to the cap. The cap is connected to the panel to excite the panel. In the case of such a panel excitation type exciter speaker, heat generated in the voice coil is discharged through the yoke, but heat dissipation efficiency is reduced because the heat transfer path is limited. That is, there is a problem in that sound quality deterioration and thermal deformation and loss occur due to the limitation of the heat dissipation area. In particular, the internal heat of the voice coil cannot be discharged, which causes deterioration in the performance of the magnet. In addition, problems such as high-temperature demagnetization of the Nd magnet, deterioration of sound quality, and thermal loss occur.

An object of one embodiment of the present invention is to provide an exciter with improved heat dissipation performance.

In order to achieve the above object, an exciter according to an embodiment of the present invention includes a frame, a magnetic circuit module disposed in the frame and forming a magnetic gap, and a voice disposed in the magnetic gap and vibrating along the oscillation axis. It is characterized in that it includes a coil, a coupler connected to the voice coil and coupled to the panel, and a heat sink disposed inside the magnetic circuit module.

According to the present invention, the heat dissipation path includes a path radiating from the outside of the voice coil to the yoke and a path radiating from the inside of the voice coil to the heat sink. Accordingly, it is possible to prevent performance deterioration due to deterioration of the magnet.

In addition, sound quality deterioration and thermal damage can be prevented by improving heat dissipation performance.

1 is a perspective view schematically illustrating an exciter according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view schematically illustrating a cross section of the exciter shown in FIG. 1 .
FIG. 3 is a diagram of a magnetic circuit module and a heat sink shown in FIG. 2 .
FIG. 4 is a view showing the coupler shown in FIG. 2 .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments described below are only presented for illustrative purposes to help a clear understanding of the present invention, and do not limit the scope of the present invention.

Since the shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining the embodiments of the present invention are exemplary, the present invention is not limited to those shown in the drawings. Like elements may be referred to by like reference numerals throughout the specification. In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

When 'includes', 'has', 'consists', etc. mentioned in this specification is used, other parts may be added unless the expression 'only' is used. When a component is expressed in the singular, the plural is included unless specifically stated otherwise. In addition, in interpreting the components, even if there is no separate explicit description, it is interpreted as including the error range.

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless the word 'directly' is used, one or more other parts may be located between the two parts.

The spatially relative terms "below, beneath", "lower", "above", "upper", etc., refer to one element or component as shown in the drawing. It can be used to easily describe the correlation between and other elements or components. Spatially relative terms should be understood as encompassing different orientations of elements in use or operation in addition to the orientations shown in the figures. For example, when flipping elements shown in the figures, elements described as “below” or “beneath” other elements may be placed “above” the other elements. Thus, the exemplary term “below” may include directions of both below and above. Likewise, the exemplary terms "above" or "above" can include both directions of up and down.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal precedence relationship is described in terms of 'after', 'following', 'next to', 'before', etc. Unless the expression is used, non-continuous cases may also be included.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first component mentioned below may also be the second component within the technical spirit of the present invention.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, "at least one of the first item, the second item, and the third item" means not only the first item, the second item, or the third item, but also two of the first item, the second item, and the third item. It may mean a combination of all items that can be presented from one or more.

Each feature of the various embodiments of the present invention can be partially or entirely combined or combined with each other, technically various interlocking and driving are possible, and each embodiment can be implemented independently of each other or together in a related relationship. may be

1 is a perspective view schematically showing an exciter 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view schematically showing a cross section of the exciter 1 shown in FIG. 1 .

1 and 2, the exciter 1 according to an embodiment of the present invention is to prevent deterioration of sound quality and thermal damage due to high temperature. To this end, the exciter 1 according to an embodiment of the present invention includes a frame 10, a magnetic circuit module 20, a voice coil 30, a coupler 40, and a heat sink 50.

The magnetic circuit module 20 is disposed on the frame 10 . The magnetic circuit module 20 forms a magnetic gap. That is, the magnetic field is concentrated in the magnetic gap. The voice coil 30 is disposed in a magnetic gap. The voice coil 30 may vibrate along the oscillation axis A by interaction with the magnetic field. The coupler 40 is connected to the voice coil 30. The coupler 40 may be coupled to the panel 11 to excite the panel 11 . The heat sink 50 is disposed inside the magnetic circuit module 20 .

FIG. 3 is a diagram of the magnetic circuit module 20 and the heat sink 50 shown in FIG. 2 .

Referring to FIGS. 2 and 3 , the magnetic circuit module 20 may have an insertion hole H1 disposed therein. The heat sink 50 is inserted into the insertion hole H1. The heat sink 50 is a metal having higher thermal conductivity than iron. For example, the heat sink 50 includes aluminum (Al). The heat sink 50 functions as a passage through which heat generated from the voice coil 30 is dissipated. In particular, the heat sink 50 serves as a dissipation passage for heat accumulated inside the magnetic circuit module 20 . As a result, the heat dissipation efficiency inside the magnetic circuit module 20 is increased. Therefore, deterioration of the voice coil 30 and the magnet 210 and the resulting thermal damage can be prevented. In particular, it is possible to prevent high heat from being transmitted to the panel 11 and causing deterioration of the panel 11 .

The magnetic circuit module 20 may include a yoke 200 , a magnet 210 and a pole piece 220 . The yoke 200 is connected to the frame 10 . The magnet 210 is disposed on the yoke 200 . The pole piece 220 is disposed on the magnet 210. The yoke 200, the magnet 210, and the pole piece 220 may have an insertion hole H1. The yoke 200, the magnet 210, and the pole piece 220 may extend in a circumferential direction with respect to the vibration axis (A). However, it is not limited thereto. The yoke 200, the magnet 210, and the pole piece 220 may have an elliptical or polygonal shape in plan view.

The heat sink 50 may include a body portion 500 and a contact protrusion 510 . The body part 500 is inserted into the insertion hole H1. The contact protrusion 510 may be disposed at an upper end of the body portion 500 . The contact protrusion 510 surrounds the outer circumferential surface of the body 500 . The contact protrusion 510 protrudes from the outer circumferential surface of the body 500 .

As an example, the contact protrusion 510 may have a contact inclined surface 511 . In addition, the pole piece 220 includes a pole piece inclined surface 221 . The pole piece inclined surface 221 is inclined from the lower surface of the pole piece 220 toward the upper surface as the distance from the vibration axis A increases. The contact inclined surface 511 corresponds to the pole piece inclined surface 221 . Therefore, the lower surface of the contact protrusion 510 gradually approaches the upper surface of the contact protrusion 510 as the contact inclined surface 511 moves away from the vibration axis A.

The contact protrusion 510 may be stably supported by the pole piece 220 . As the heat sink 50 is inserted into the insertion hole H1, the contact protrusion 510 is supported by the pole piece 220. Therefore, assembly of the contact protrusion 510 and the pole piece 220 is easy. In addition, the contact inclined surface 511 is in surface contact with the pole piece inclined surface 221 . Accordingly, heat transfer performance from the pole piece 220 to the heat sink 50 may be increased. Meanwhile, the heat sink 50 effectively and quickly dissipates the heat generated in the voice coil 30 to the lower portion of the magnetic circuit module 20 . Accordingly, heat accumulation inside the voice coil 30 can be prevented and heat dissipation efficiency can be increased.

The heat sink 50 has a through hole H3 therein. The heat dissipation area of the through hole H3 of the heat sink 50 may be increased to improve heat dissipation efficiency. In addition, the through hole H3 of the heat sink 50 allows the lower part of the panel 11 and the lower part of the magnetic circuit module 20 to communicate with each other, thereby buffering the pressure change occurring on the lower surface of the panel 11 . Thereby, sound generating ability can be improved.

The magnetic circuit module 20 may further include an auxiliary magnet 230 . The auxiliary magnet 230 covers the pole piece 220 and the heat sink 50 . The auxiliary magnet 230 reinforces the magnetic field in the magnetic gap positioned above the pole piece 220 . As a result, the magnetic field reduced by the insertion hole H1 of the magnet 210 is reinforced so that strong driving force can be secured. The auxiliary magnet 230 may have a through hole H2 disposed therein. The through hole H2 of the auxiliary magnet 230 communicates with the through hole H3 of the heat sink 50 . Therefore, even if the auxiliary magnet 230 is installed, heat dissipation performance is secured, and a pressure change between the magnetic circuit module 20 and the panel 11 is buffered to ensure sound performance.

FIG. 4 is a view showing the coupler 40 shown in FIG. 2 .

Referring to FIGS. 2 to 4 , the coupler 40 transfers the vibration of the voice coil 30 to the panel 11 . The damper 60 is connected to the voice coil 30 and the frame 10. The damper 60 may support vibration of the voice coil 60 . The coupler 40 may include a voice coil coupling unit 400 , a panel coupling unit 410 and a vibration path unit 420 . The voice coil coupling part 400 is coupled to the voice coil 30 . An upper end of the voice coil 30 may be at least partially inserted into the voice coil coupling part 400 . Thereby, it can be stably bonded. The panel coupling part 410 is coupled to the panel 11 . The vibration path unit 420 is connected to the panel coupling unit 410 and the voice coil coupling unit 400 . The vibration path unit 420 transmits vibration from the voice coil coupling unit 400 to the panel coupling unit 410 .

In one embodiment, the panel coupling part 410 is disposed in plurality. In addition, a plurality of vibration path units 420 are disposed corresponding to the panel coupling unit 410 . Any one of the plurality of panel coupling parts 410 may be disposed to surround the other one. The plurality of panel coupling parts 410 may be spaced apart in a radial direction based on the vibration axis (A). In addition, the plurality of panel coupling parts 410 may extend side by side along the circumferential direction.

The plurality of vibration path parts 420 pass through the voice coil coupling part 400 and may be arranged symmetrically with respect to an axis parallel to the vibration axis A. The plurality of vibration path parts 420 can prevent sound distortion by having a plurality of positions where the panel 11 is excited.

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

1 : Exciter
10 : frame
20: magnetic circuit module
200: York
210: magnet
220: Pole piece
221: pole piece slope
230: auxiliary magnet
30: voice coil
40: coupler
400: voice coil coupling part
410: panel coupling part
420: vibration path part
50: heat sink
500: body part
510: contact protrusion
511: contact slope
60: damper

Claims (13)

frame;
a magnetic circuit module disposed on the frame and forming a magnetic gap;
a voice coil disposed in the magnetic gap and oscillating along the oscillation axis;
Couplers connected to the voice coil and coupled to the panel; and
An exciter comprising a heat sink disposed inside a magnetic circuit module. According to claim 1,
The magnetic circuit module has an insertion hole disposed therein,
The heat sink is an exciter inserted into the insertion hole. According to claim 1,
The magnetic circuit module,
yoke connected to the frame;
a magnet disposed on the yoke; and
An exciter comprising a pole piece disposed on a magnet. According to claim 3,
heat sink,
body part; and
An exciter comprising a contact protrusion protruding from a body portion. According to claim 4,
The pole piece includes a pole piece slope,
The pole piece inclined surface is an exciter including a pole piece inclined surface that is inclined from the lower surface of the pole piece toward the upper surface as it moves away from the vibration axis. According to claim 5,
The contact protrusion includes an exciter including a contact inclined surface corresponding to the pole piece inclined surface. According to claim 1,
The heat sink is an exciter with higher thermal conductivity than iron. According to claim 1,
The heat sink is an exciter having a through hole therein. According to claim 3,
The magnetic circuit module further includes an auxiliary magnet covering the pole piece and the heat sink. According to claim 9,
The auxiliary magnet is an exciter having a through hole therein. According to claim 1,
An exciter connected to the frame and further including a damper supporting the voice coil. According to claim 1,
coupler,
A voice coil coupler coupled to the voice coil;
Panel coupling part coupled to the panel; and
An exciter connected to the voice coil coupling unit and the panel coupling unit, and including a vibration path unit transmitting vibration. According to claim 12,
The panel coupling part is arranged in plurality,
Exciter arranged in plurality of vibrating path parts corresponding to the panel coupling part.

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