KR20110045910A - Clutch device and display device comprising the same - Google Patents

Abstract

PURPOSE: A clutch device and a display device comprising the same are provided to expose or insert a speaker module by a power state. CONSTITUTION: A case includes a front cover and a rear cover. The case has openings on one or more sides. A display module is arranged in the rear part of the front cover. One or more speaker modules(100) are located in the aperture side of the case. The speaker module is exposed or inserted through the opening of the case. A gear assembly reciprocates the speaker module.

Description

Clutch device and display device comprising the same

The present invention relates to a display device having a variety of high-quality appearance quality.

According to the present invention, the speaker module is exposed to the outside of the display device or disappears inside according to whether the user input or the external power is applied, and thus various appearance designs can be produced and the non-display area exposed to the front can be minimized. The present invention relates to a display device capable of implementing an excellent appearance design such as borderless), preventing local wear of the clutch portion due to long-term operation, and ensuring product reliability.

The display device refers to a device that displays an image signal input from the outside. Such a display device is a concept including a monitor for displaying an image received from a computer and a television for displaying an image and a sound transmitted from a broadcasting station, and all devices for displaying an image input from the outside.

Recently, high-quality large display devices equipped with flat panel display modules such as liquid crystal display panels (LCDs) or plasma display panels (PDPs) have been in the spotlight.

The display device includes a display module for realizing an image, a speaker module for realizing an image, a front cover surrounding the front edge of the display module, and a rear cover covering the rear of the display module.

Recently, as the display device has been enlarged, slimmed, and advanced, design elements for satisfying the user's aesthetics as well as basic image display functions have been emphasized.

The speaker module used in the conventional display device is disposed to face the front of the front cover, or is disposed to face downward of the front cover, the arrangement is fixed, and thus does not have a design element.

Recently, a borderless display device has been newly introduced to eliminate the boundary between the display area and the non-display area of the front cover due to the emphasis on design elements. For this purpose, the non-display area of the front cover of the display device should be minimized.

However, in the conventional display device, as described above, since the speaker module is mounted on the front cover, a non-display area of a predetermined width or more is required for the installation of the speaker module. Therefore, there was a limit in implementing excellent appearance quality.

On the other hand, the present invention relates to a clutch device that can prevent local wear even in long-term use, and can ensure life and operating reliability.

The clutch device refers to a device used to transmit power or to block power transmission. A driving mechanism for various components used in an electronic device such as a display device, a CD-ROM driver, or a VCR is felt. A clutch system using wool) is used.

However, the conventional clutch method has a problem that it is difficult to implement a force for a certain operation due to the local wear and break occurs in the felt during long-term use, it is difficult to secure the life cycle reliability of the product.

The present invention has been made to solve the above problems, an object of the present invention is to produce a variety of appearance design by the speaker module is exposed to the outside of the display device or disappears in accordance with whether the user input or external power is applied. It is to provide a display device.

In addition, another object of the present invention is to provide a display device capable of minimizing the non-display area exposed to the front surface to implement a luxurious appearance design such as borderless.

In addition, another object of the present invention is to provide a clutch device that can prevent the local wear of the felt due to long-term operation, and ensure the life and operating reliability of the product.

The present invention is to achieve the above object,

According to an aspect of the present invention, a display module disposed on the rear of the front cover and a case having an opening formed in at least one side, including a front cover and a rear cover coupled to the front cover to form a predetermined space; A display including at least one speaker module disposed in the space portion so as to be located at the opening side of the case, and a gear assembly for reciprocating the speaker module to be exposed to the outside of the case or inserted into the case through the opening of the case; An apparatus is provided.

Here, the gear assembly, the driving generating unit for generating a rotational power and the driving power to transmit the rotational power by friction, or to block the transmission of power by idle rotation and the power received from the drive clutch unit the speaker It may include a drive for reciprocating the module to the outside or inside of the case.

In addition, the drive clutch unit receives the rotational power of the drive generator, the input gear formed with the first through hole in the rotation center axis and the second through hole formed in the rotation center axis, the spiral contact surface with the input gear A protrusion is formed, disposed between the output gear for transmitting the transmitted power to the driving unit and the contact surfaces of the input gear and the output gear, the felt and the input gear for transmitting the rotational power of the input gear to the output gear by friction And through and through the first through hole and the second through hole of the output gear, it may include a binding member for close contact between the input gear and the output gear.

At this time, the projection of the output gear may be formed of a single projection having a continuous roll shape in a clockwise or counterclockwise direction, the projection in contact with the different phases along the radial direction of the felt when the input gear is rotated. Can be.

Alternatively, the protrusions of the output gear may be formed of a plurality of protrusions formed along a clockwise or counterclockwise direction, and each of the protrusions may contact different phases along the radial direction of the felt when the input gear rotates.

The driving clutch unit may further include a spring disposed in a space between the binding member, the first through hole, and the second through hole, to increase the adhesion of the input and output gears.

In addition, the speaker module may include a housing and one or more speakers mounted in the housing.

On the other hand, the case is formed with a guide for guiding the horizontal reciprocating movement of the housing, the housing by the gear assembly can be moved horizontally to the inside or outside of the opening of the case.

Alternatively, the housing is hinged to the opening side of the case, the housing by the gear assembly, one side of the housing can be horizontally moved inward or outward of the case.

The drive unit may include a pinion gear meshed with the output gear and a rotational movement of the pinion gear in a linear motion, and a rack plate having one end fixed to the speaker module.

In addition, the binding member may include a bushing passing through the input gear and the output gear, a ring mounted at an end of the bushing, and a washer disposed between the input gear and the ring.

According to another aspect of the present invention, a spiral projection is formed on the contact surface between the input gear and the input gear that receives power from the drive generator, the output gear and the contact surface of the input gear and the output gear for outputting the transmitted power. The clutch device is disposed between the clutch, and includes a felt for transmitting the rotational power of the input gear to the output gear by friction, and a coupling member for penetrating the input gear and the output gear together, the input member and the output gear in close contact with each other. Is provided.

Here, the protrusion of the output gear may be formed of a single protrusion continuously formed along the clockwise or counterclockwise direction, and when the input gear is rotated, the protrusion may be in contact with each other phase along the radial direction of the felt. .

Alternatively, the protrusions of the output gear may be formed of a plurality of protrusions formed along a clockwise or counterclockwise direction, and each of the protrusions may contact different phases along the radial direction of the felt when the input gear rotates.

As described above, the display device according to the present invention may produce various appearance designs by exposing the speaker module to the outside of the display device or disappearing inside according to whether a user input or an external power source is applied.

In addition, the display device according to the present invention can minimize the non-display area exposed on the front surface can implement a luxurious appearance design such as borderless (Borderless).

In addition, the clutch device according to the present invention can prevent the local wear of the felt due to long-term operation, and can ensure the life and operating reliability of the product.

Hereinafter, a display device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings show exemplary forms of the present invention, which are provided to explain the present invention in more detail, and the technical scope of the present invention is not limited thereto.

In addition, irrespective of the reference numerals, the same or corresponding components will be given the same reference numerals, and redundant description thereof will be omitted. For convenience of description, the size and shape of each component may be exaggerated or reduced. have.

On the other hand, terms including ordinal numbers such as first or second may be used to describe various components, but the components are not limited by the terms, and the terms are defined by one component from another component. It is used only for the purpose of distinguishing.

FIG. 1 is a perspective view illustrating a display device 1 according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a main part in a state taken along the line II ′ of FIG. 1.

The display device 1 according to an embodiment of the present invention includes a case 10 forming an appearance, a display module 30 disposed in the case and implementing an image, and a speaker module disposed in the case and implementing sound. 100 and a gear assembly (not shown) to reciprocate to expose the speaker module 100 to the outside of the case 10 or to be inserted into the case 10.

1 and 2, the case 10 includes a display area 11a for displaying an image to the outside and a non-display area 11b formed translucent or opaque so that the image is not displayed to the outside. And a rear cover 12 coupled to the cover 11 and the front cover 11 to form a predetermined space (unsigned).

In addition, an opening (unsigned) for accessing the speaker module 100 is formed at the side of the case 10.

The display area 11a and the non-display area 11b of the front cover 11 may be divided in various ways. In one embodiment, the display area 11a may be formed of a plate formed of transparent resin or glass. The non-display area 11b may be formed by printing a translucent or opaque ink or film on one edge portion of the plate.

In addition, the front cover 11 may perform a function of correcting optical characteristics of a display image displayed from the display module or shielding electromagnetic waves or near infrared rays, and for this purpose, a plurality of functional layers may be stacked on the front cover 11. Can be.

In addition, the display module 30 and the speaker module 100 are disposed in a space portion (not shown) between the front cover 11 and the rear cover 12.

The display module 30 may include a cathode ray tube (CRT), an electroluminescent device (EL), a light emitting diode (LED), a vacuum fluorescence display (VFD), A light emitting or light receiving module such as a field emission display (FED), a plasma display panel (PDP), a liquid crystal display (LCD), and the like may be included. The display device 1 according to the present invention may be implemented as various types of video display devices such as a television or a monitor.

The speaker module 100 may include a housing (not shown) and one or more speakers (not shown) mounted in the housing.

In addition, the display device 1 includes a mounting member 20 having one end portion coupled to a rear surface of the non-display area 10b of the front cover 10 and the other end portion supporting one end portion of the display module 30. 40 may be further included, wherein the rear cover 12 may be fastened to the mounting members 20 and 40.

Meanwhile, referring to FIG. 1, the display apparatus 1 may further include a stand 100 that supports and distributes the load of the display main body, and the stand 100 includes a base part mounted on an installation surface ( 102 and the neck unit 101 connecting the base unit and the display main body, and the stand 100 may be configured to implement a tilting or swivel operation to provide an optimal viewing angle.

1 illustrates a case in which a load is supported by the stand 100 in the display main body, but is not limited thereto. The display main body may be fixed and supported on a wall by a wall-mounted type.

Hereinafter, the method of assembling each component and the mounting members 20 and 40 constituting the display device 1 will be described in detail.

Referring to FIG. 2, the mounting member is adhered to the rear surface of the non-display area 10b of the front cover 10, and the one or more brackets 20 and the boss holes 21 in which a plurality of boss holes 21 are formed. The fastening hole 41 is formed at a position corresponding to the fastening hole 41 and is fastened to the bracket 20, and may include a supporter 40 supporting one end of the display module 30.

In addition, a fastening hole 13 is formed at a position corresponding to the boss hole 21 of the bracket 20 in the rear cover 12, and the rear cover 13 is connected to the bracket (S) through a screw (S). 20, the display module 30 is disposed and fixed in a space between the front cover 11 and the rear cover 12.

The bracket 20 may have a bar-type structure extending in the longitudinal direction, and the plurality of brackets 20 may have a predetermined interval on the rear surface of the non-display area 10b of the front cover 10. It may be attached or adhered to each other in a spaced state.

As shown in FIG. 2, each component constituting the display device 1 may be assembled through the bracket 20, and the bracket 20 may be prevented from being exposed to the outside. Is adhered or adhered to the rear surface of the non-display area 10b of the front cover 10.

In addition, the support 40 has a fastening hole, a support part which is seated in the opening of the boss hole 21 and a support part which supports one end of the display module 30, and a connection part which connects the fastening part and the support part. It may include, and may be formed to have a variety of structures capable of performing such a function.

In addition, an adhesive layer (not shown) may be formed between the supporter 40 and one end of the display module 30 so as to be attached or adhered to each other, and a cushion member (not shown) may be inserted.

On the other hand, as shown in Figure 2, the supporter 40 and the rear cover 12 can be fastened together in the same boss hole 21 of the bracket 20, thereby simplifying the assembly process and assembly time and You can save money.

3 is a front view illustrating an operating state of a display apparatus according to an exemplary embodiment of the present invention, and FIG. 4 is a plan view illustrating a rear surface of the front cover illustrated in FIG. 3.

In the display device 1 according to the exemplary embodiment of the present invention, the speaker module 100 may be exposed and inserted into the inside and the outside of the case 10 by the gear assembly 200, respectively.

Referring to FIG. 3, the speaker module 100 may be mounted at an opening side formed at a side of the case, and in FIG. 3, openings formed at both sides of the case 10 (not shown, see FIG. 1). Shown are two speaker modules 100 mounted on each.

The speaker module 100 may include a housing 101 and one or more speakers 102 and 103 mounted in the housing 101.

A discharge hole (not shown) may be formed at a front surface of the housing 102 to transmit sound at the mounting positions of the speakers 102 and 103, and the speaker may be in close contact between the front and rear surfaces of the housing 102. It may be mounted to.

As shown in FIG. 3, the speaker module 100 is exposed to the outside of the case 10 when power is applied to the display device 1 through the opening of the case 10 in a sliding reciprocating manner. When the display device 1 is disconnected from the power source, the speaker 10 may be inserted into the case 10. Alternatively, the speaker module 100 may be hingedly rotated (not shown) to open the case 10. When power is applied to the display apparatus 1 through the display apparatus 1, the display apparatus 1 may be inserted into the case 10 when the display apparatus 1 is exposed to the outside of the case 10 or when the display apparatus 1 is cut off.

Hereinafter, the gear assembly 200 implementing the sliding reciprocating movement method and the hinge rotation movement method of the speaker module 100 will be described in detail.

Referring to FIG. 4, the gear assembly 200 transmits rotational power of the drive generator 210 and the drive generator 210 to generate rotational power in the forward and reverse directions by friction, or by idling. Drive clutch unit 220 and the drive clutch unit 220 and the speaker module 100 to block the transmission is connected, receives the rotational power from the drive clutch unit 220 to the speaker module 100 outside the case or It may include a driving unit 280 for reciprocating inward.

5 is a plan view of a gear assembly configuring a display device according to an exemplary embodiment.

Referring to FIG. 5, the drive generation unit 210, the drive clutch unit 220, and the drive unit 280 of the gear assembly 200 may be installed on one first base plate 201, and the drive generation unit ( 210 may be configured as a motor rotatable in the forward or reverse direction, respectively, the end of the motor may be equipped with a gear 211 for power transmission.

4 and 5, the driving unit 280 may further include a pinion gear 283 and a pinion gear 283 engaged with the output gear (not shown) of the driving clutch 220 in a linear motion. Alternately, one end may include a first rack plate 184 fixed to the housing 101 of the speaker module 100.

The first rack plate 284 has a bar shape, and a tooth 284a for engaging the pinion gear 283 is formed at one side thereof and fixed to the first base plate 201. It may be mounted to the horizontal reciprocating movement along the one guide rail (285).

In addition, the driving unit 280 may further include a plurality of reduction gears 281 and 282 mounted between the output gear of the driving clutch 220 and the pinion gear 283.

In addition, the first base plate 201 is provided with first and second limit switches for controlling the entrance displacement d of the speaker module 100 along the reciprocating direction of the first rack plate 284. Each may be mounted at predetermined intervals.

In the gear assembly 200 configured as described above, when the motor 210 rotates in one direction, the rotational power is transmitted to the pinion gear 283 through the driving clutch unit 220, and engaged with the pinion gear 283. The first rack plate 284 is horizontally moved (direction toward the outside based on the opening of the case) from the first limit switch L1 to the second limit switch L2 along the first guide rail 285. The housing 101 fixed to one end 284b of the first rack plate 284 is also horizontally moved, and as shown in FIG. 4, the speaker module 100 is exposed to the outside of the case.

On the contrary, when the motor 210 rotates in the other direction, the rotational power is transmitted to the pinion gear 283 through the driving clutch unit 220, and the first rack plate engaged with the pinion gear 283 ( 284 is horizontally moved from the second limit switch L2 to the first limit switch L1, and thus the housing 101 fixed to one end 284b of the first rack plate 284 is also the case 10. The speaker module 100 is horizontally moved toward the inner side of the case 10 and is inserted into the case 10 (see FIG. 1).

Referring to Figure 4, the sliding reciprocating method will be described in more detail.

Referring to FIG. 4, guide parts (not shown) for guiding horizontal reciprocating movement of the housing 102 of the speaker module 100 may be formed on the rear surfaces of the top and bottom surfaces of the front cover 11, respectively. have.

On the other hand, as the display device 1 is enlarged, the volume of the speaker module 100 for producing a high output also increases, so that the driving unit 280 implements a stable and efficient reciprocating movement of the speaker module 100. In order to be connected to the upper end and the lower end of the housing 101 of the speaker module, respectively.

To this end, the driving unit 280 is the second base plate 286 mounted on the rear surface of the display module 30, the second guide rail 287 and the second base plate 286 mounted on the second base plate 286 It may further comprise a second rack plate 288 mounted reciprocally on the guide rail 287.

In addition, the first rack plate 284 and the second rack plate 288 may be connected to each other by the connecting bracket 290, in order to share the power transmitted from one drive generating unit, as the motor 210 rotates As the first and second rack plates 284 and 288 are driven together, horizontal movement of the stable speaker module 100 may be realized.

 In addition, the ends of the first rack plate 284 and the second rack plate 288 fixed to the housing 101 may be interconnected by connecting rods 289 for strength reinforcement.

So far, the sliding horizontal reciprocating movement method of the speaker module 100 has been described, but the present invention is not limited thereto and may be applied to the hinge rotation movement method through the gear assembly 200.

At this time, one side of the housing 101 of the speaker module 100 is hinged to the opening side of the case 10, the gear assembly 200 is connected to the other side of the housing, the housing 101 is a case ( 10 may be rotated inward or outward of the opening of the opening and may be exposed to the outside of the case 10 according to the user input or the application of external power, or may be inserted into the case 10 according to the user input or the external power. have.

Accordingly, the display device according to the present invention can produce various appearance designs by exposing the speaker module to the outside of the display device or disappearing inside according to whether a user input or an external power source is applied.

In addition, since the display device according to the present invention can minimize the non-display area exposed on the front surface, it is possible to implement a luxurious appearance design such as borderless.

Meanwhile, referring to FIGS. 4 and 5, the entrance and displacement d of the speaker module 100 is difficult to accurately control by the motor or the plurality of limit switches L1 and L2, and thus, the first rack plate 284. ) Is positioned at the first limit switch (exposed state of the speaker module), the transmission of the rotational power of the motor to the drive unit should be blocked, and also if the first rack plate 284 is located at the second limit switch ( The insertion state of the speaker module) should be blocked from transmitting the rotational power of the motor to the driving unit.

The drive clutch unit 220 performs a function of interrupting or transmitting power of the motor.

FIG. 6 is an exploded perspective view illustrating the driving clutch unit constituting the gear assembly of FIG. 5.

The driving clutch 220 receives the rotational power of the driving generator 210, input gear 230 having a first through hole (unsigned) formed in the central axis of rotation, and a second through hole in the central axis of rotation. 251 is formed, a spiral protrusion (not shown) is formed on a contact surface with the input gear 230, and an output gear 250 and an input gear 230 and an output gear (250) for outputting the transmitted power to the driving unit. It is disposed between the contact surfaces of 250, and includes a felt (240) for transmitting the rotational power of the input gear 230 to the output gear 250 by friction.

In addition, the driving clutch 220 penetrates the first through hole and the second through hole of the input gear 230 and the output gear 250 together, and closes the input gear 230 and the output gear 250. The binding member 260 is included.

In addition, the driving clutch 220 is disposed in the space between the binding member 260 and the first and second through-holes, the spring 270 to increase the adhesion between the input gear 230 and the output gear 250. ) May be further included.

The binding member 260 penetrates the input gear 230 and the output gear 250 together, has a head portion and a rod portion, and a bushing 261 having grooves 261a formed at one end portion of the rod portion in a circumferential direction. ) And a ring 262 coupled to the groove of the bushing 261 and a washer 263 disposed between the ring 262 and the input gear 230.

The ring 262 may be a snap ring and may be an O-ring, a C-ring, or an E-ring.

Therefore, the upper end of the output gear 250 is supported by the head of the bushing, and the lower end of the input gear 230 is supported by the ring 262, whereby the input gear 230 and the output gear 250 are In close contact with each other, the adhesion force is increased by the aforementioned spring 270.

As described above, the driving clutch unit 220 configured as described above rotates the input gear 230 and the output gear 250 together with the rotation of the motor 210, and transmits power to the driving unit 280. When the first rack plate 284 reaches the position of the first limit switch L1 or the second limit switch L2, only the input gear 230 rotates, and the output gear 250 does not rotate.

At this time, abrasion occurs between the spiral protrusion formed on the bottom surface of the output gear 250 and the felt 240 according to the idling of the output gear 250.

FIG. 7 is a bottom perspective view of the output gear 250 constituting the driving clutch of FIG. 6, FIG. 8 is a plan view showing a protrusion formed on the bottom of the output gear of FIG. 7, and FIG. 9 is a contact of the protrusion shown in FIG. 8. It is a graph showing the phase.

8A and 9A are comparative views for explaining the advantageous effects of the spiral protrusion, and show concentric protrusions.

The output gear 250 may be in line contact or surface contact with the felt 240. In the case of the line contact, the frictional force is small, which is advantageous for idling. There is a problem in that the idling is difficult due to large friction. However, in the case of the line contact, there is a problem that wear occurs in the felt 240 according to the shape of the line in contact.

6 and 7, the output gear 250 may include a base portion 253 in which surface contact with the felt 240 is made, and a gear portion 252 protruding from the base.

In addition, the output gear 250 has a spiral protrusion 254 formed on the bottom surface of the base portion 253.

8 and 9, the protrusion 254 of the output gear 250 may be formed of a single protrusion having a continuous roll shape along a clockwise direction R or a counterclockwise direction. When the protrusion 230 is rotated, the protrusions may contact different phases along the radial direction R of the felt 240.

Alternatively, the projection 254 of the output gear 250 may be formed of a plurality of projections formed along the clockwise or counterclockwise direction, each of the projections when the input gear 230 rotates the radius of the felt 240 It may be in contact with different phases along the direction R.

That is, the protrusion 254 is a shape that does not have a plurality of concentric shapes whose radius increases along the radial direction R of the felt as shown in FIG. If the structure is not made, it can have various shapes.

Referring to FIGS. 8 and 9, the protrusion 254 having the spiral structure may have a different phase along the radial direction R of the felt as a portion H of the protrusion is rotated by the input gear 230. Can be contacted.

Alternatively, the projections having a concentric circle structure may always be in contact with the same phase along the radial direction of the felt as the region L is rotated by the input gear.

Therefore, in the case of having a concentric circle structure, the contact section and the non-contact section occur in the felt 240, so that local wear occurs along the circular line, and thus may cause a problem that breakage occurs easily.

However, when the protrusion 254 is spirally formed as in the present invention, wear can be uniformly generated over the entire surface of the felt 240, and thus life and operating reliability can be secured for a long time.

Meanwhile, the driving clutch unit 220 may be used in various electronic devices as a separate clutch device as well as the display device 1.

The clutch device has a spiral projection formed on the contact surface between the input gear and the input gear that receives power from the drive generation unit, and includes an output gear for outputting the transmitted power, and further, a contact surface between the input gear and the output gear. And a felt member configured to penetrate the input gear and the output gear together, the felt being configured to transmit rotational power of the input gear to the output gear by friction, and a binding member to closely contact the input gear and the output gear. As a module in which the component members are combined into one, it can be applied to various electronic devices.

That is, the clutch device has the same structure and function as the above-described driving clutch 220, but the structure of the driving generator and the driving unit may be modified according to the applied electronic device.

Therefore, the clutch device according to the present invention can prevent the local wear of the felt due to long-term operation, and can ensure the life and operating reliability of the product.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art having various ordinary knowledge of the present invention may make various modifications, changes, and additions within the spirit and scope of the present invention. And additions should be considered to be within the scope of the following claims.

1 is a perspective view showing a display device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the main part structure of a state taken along the line II ′ of FIG. 1. FIG.

3 is a front view showing an operating state of a display device according to an embodiment of the present invention.

4 is a plan view showing the rear side of the front cover shown in FIG.

5 is a plan view of a gear assembly constituting a display device according to an embodiment of the present invention.

FIG. 6 is an exploded perspective view illustrating the driving clutch unit configuring the gear assembly of FIG. 5. FIG.

7 is a bottom perspective view of an output gear constituting the drive clutch of FIG. 6;

8 is a plan view illustrating a protrusion formed on a bottom surface of the output gear of FIG. 7.

FIG. 9 is a graph showing a contact phase of a protrusion illustrated in FIG. 8. FIG.

Claims (16)

A case having a front cover and a rear cover coupled to the front cover to form a predetermined space, and having an opening formed in at least one side surface; A display module disposed behind the front cover; At least one speaker module disposed in the space part so as to be located at an opening side of the case; And And a gear assembly for reciprocating the speaker module to be exposed to the outside of the case or inserted into the case through the opening of the case. The method of claim 1, wherein the gear assembly, A drive generator for generating rotational power; A driving clutch unit which transmits the rotational power by friction or blocks power transmission by idling; And And a driving unit receiving power from the driving clutch unit to reciprocate the speaker module to the outside or the inside of the case. The method of claim 2, wherein the drive clutch unit, An input gear configured to receive the rotational power of the drive generation unit and have a first through hole formed in the central axis of rotation; An output gear configured to have a second through hole formed on the central axis of rotation, a spiral protrusion formed on a contact surface with the input gear, and to transmit the transmitted power to the driving unit; A felt disposed between the contact surfaces of the input gear and the output gear and transferring rotational power of the input gear to the output gear by friction; And And a binding member that penetrates the first through hole and the second through hole of the input gear and the output gear together, and closes the input gear and the output gear. The method of claim 3, wherein The projection of the output gear is made of a single projection having a continuous roll shape in the clockwise or counterclockwise direction, and the rotation of the input gear is in contact with the different phases along the radial direction of the felt. Display device. The method of claim 3, wherein The projection of the output gear is composed of a plurality of projections formed along the clockwise or counterclockwise direction, each of the projections when the rotation of the input gear is in contact with the different phases along the radial direction of the felt. The method of claim 3, wherein the drive clutch unit, And a spring disposed in the space between the binding member, the first through hole, and the second through hole, the spring increasing the adhesion of the input and output gears. The method of claim 1, wherein the speaker module, housing; And And at least one speaker mounted in the housing. The method of claim 7, wherein The case is provided with a guide for guiding the horizontal reciprocating movement of the housing, the display device, characterized in that the housing is moved horizontally to the inside or outside of the opening of the case. The method of claim 7, wherein The housing is hinged to the opening side of the case, the display device by the gear assembly is characterized in that the one side is horizontally moved to rotate the inside or outside of the case. The method of claim 3, wherein the driving unit, A pinion gear meshed with the output gear; And And a rack plate having one end fixed to the speaker module, the rotational movement of the pinion gear being changed to a linear movement. The method of claim 3, wherein The binding member includes a bushing passing through the input gear and the output gear, a ring mounted at an end of the bushing, and a washer disposed between the input gear and the ring. An input gear to receive power from the drive generator; An output gear configured to form a spiral protrusion on a contact surface with the input gear and to transmit the transmitted power; A felt disposed between the contact surfaces of the input gear and the output gear and transferring rotational power of the input gear to the output gear by friction; And And a binding member penetrating the input gear and the output gear together and bringing the input gear and the output gear into close contact with each other. 13. The method of claim 12, The projection of the output gear is made of a single projection continuously formed along the clockwise or counterclockwise direction, the rotation of the input gear when the projection is characterized in that the contact with the different phases along the radial direction of the felt Device. 13. The method of claim 12, The projection of the output gear is composed of a plurality of projections formed along the clockwise or counterclockwise direction, each of the projections in the rotation of the input gear, the clutch device, characterized in that in contact with the different phase along the radial direction of the felt. 13. The method of claim 12, The binding member includes a bushing passing through the input gear and the output gear, a ring mounted at an end of the bushing, and a washer disposed between the output gear and the ring. The method of claim 15, And a spring disposed on an outer circumferential surface of the binding member, the spring further increasing adhesion between the input and output gears.

Images