KR101783640B1 - A position control apparatus for a television receiver - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a display position adjusting device, and more particularly, to a display position adjusting device capable of easily and easily adjusting the angle of a display by an angle adjusting device.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a worm-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a worm gear type display position adjusting device, and more particularly, to a worm gear type display position adjusting device capable of easily and easily adjusting an angle of a display by rotating a worm gear.

While watching TV is one of the main entertainment and information sources for people, watching TV for a long time at a fixed location makes the body uncomfortable, causing diseases such as periarticular inflammation of the scapula, back pain, spinal cord, and sciatica .

To solve these problems, we tried to make people enjoy TV programs rich and colorful.

Accordingly, in recent years, people can comfortably watch the TV by remotely or manually adjusting the height and time of the TV set according to the viewing angle at their own position, lying or sitting, in order to place the TV set in the optimum time, There is a need for a display position controller that meets the requirements for treating patients with the same disease and hospital bed.

The present inventor has patented a "TV receiver position control device" which is disclosed in Korean Patent Registration No. 10-0521359 and satisfies the above requirements as shown in Figs. 1 to 4.

This allows the viewer to move the TV set to a desired height so as to match the viewer's eye level according to the viewing posture and to view the TV set at a proper angle by adjusting the angle. The frame 1 is provided with a frame A moving block 20 which is supported movably in the up and down direction along the frame 10 and on which the TV receiver 200 is fixed and a moving block 20 for moving the moving block 20 up and down relative to the frame 10 And an angle adjusting means for adjusting the angle of the TV receiver 200 with respect to the moving block 20. [

The elevating means includes a screw shaft 11 which is vertically and rotatably supported on the frame 10 and to which the moving block 20 is screwed, A guide rod 12 and 13 supported by the movable block 20 and slidably coupled to the movable block 20 and a driving motor for driving the screw shaft 11 to rotate.

The lower side of the rear side of the TV receiver 200 and the lower side of the moving block 20 corresponding to the lower side of the TV receiver 200 are rotatably connected by the hinge pieces 21, A rotary member 30 rotatably driven by a rotary motor 500 and having a vertical protrusion 31 at an end thereof and a link member 30 having one end rotatably coupled to an end of the vertical protrusion 31, And a lever member 33 having one end rotatably connected to the other end of the link member 32 and the other end fixed to the upper side of the TV receiver 200.

Such an angle adjusting means is a means for adjusting the angle of the hinge pieces 201 and 21 by the joint action of the rotary center body 30, the link member 32 and the lever members 33, So that it can be rotated around the center. Likewise, the rotary motor 500 is remotely controlled by a remote controller 310 employing a light receiving sensor and a light emitting sensor. Therefore, the viewer 300 can control the angle of the TV receiver 200 at a desired angle at the viewing position.

Such a device can be moved to a desired height according to the eye level of a viewer of the TV receiver 200 by driving the screw driving motor and the rotary motor 500 forward and backward, Thereby enabling control by control.

However, when the viewing angle is adjusted, the load of the TV receiver 200 is transferred to the rotating motor 500 of the angle adjusting means, and the rotating motor is loaded on the rotating motor 500. Even after the angle is adjusted, There is a problem that the angle of rotation is lowered due to rotation of the rotating motor.

Korea Patent No. 10-0521359

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a display device, in which a display is mounted on a front end thereof and a rear end of a main link, So that the angle of the display can be prevented from being lowered by the load of the display position adjusting device.

According to an aspect of the present invention, there is provided a display position adjusting apparatus comprising: a pedestal; A main bracket fixedly mounted on an upper portion of the pedestal; A lifting means vertically mounted on the main bracket; An auxiliary bracket for vertically moving up and down by the elevating means; A main link rotatably hinged to the front of the auxiliary bracket to seesaw motion and having a front mounted display; Angle adjusting means for adjusting the angle of the main link mounted on the auxiliary bracket and seesaw by hinge coupling; Wherein the angle adjusting means comprises: a body hinged to the auxiliary bracket; A first worm gear rotatably mounted in the body and having a bolt hole; A first worm engaged with the first worm gear; A rotating motor coupled to the body for rotating the first worm; A lower shaft having a threaded portion and coupled to the bolt hole, and an upper end hinged to a rear end of the main link; Wherein when the first worm gear rotates due to rotation of the rotation motor, the extensible rod moves in the vertical direction by the thread coupled to the bolt hole to adjust the angle of the main link,

And a pressing means which is mounted on both left and right sides of the upper end of the elevating means and presses the left and right sides of the auxiliary bracket upward and downward by the elevating means in the upward direction, A case coupled to the housing; A rotary shaft having one side projecting outwardly of the case and coupled to the case rotatably; An inner side fixed to the inner peripheral edge of the case and an inner side coupled to the other side of the rotary shaft and compressed by rotation of the rotary shaft; A take-up reel coupled to one side of the rotating shaft; And a rope having one end wound around the take-up reel and the other end coupled to the auxiliary bracket, wherein when the auxiliary bracket is lowered, the rope is unwound from the take-up reel, So that the auxiliary bracket is pressed upward and the rope is wound on the take-up reel while the auxiliary bracket is lifted up and down by the compressed compressive force to pull the auxiliary bracket.

And tension adjusting means mounted on the pressing means for adjusting a tension of the spring spring.

Further, the tension adjusting means may include: a second worm gear coupled to one side of the rotation shaft; A second worm formed at one side thereof with a tool engagement portion formed therein and coupled to the lifting means so as to be engaged with the second worm gear; When the second worm is rotated, the second worm gear rotates to rotate the rotation shaft to adjust the tension of the spring.

Guide means for guiding the auxiliary bracket to move up and down by the elevating means; Wherein the guide means comprises: a guide projection formed in the vertical direction of the elevating means; A guide groove formed in the auxiliary bracket and slidably inserted with the guide protrusion; And the auxiliary bracket is slid along the guide protrusion inserted into the guide groove to prevent the auxiliary bracket from flowing when the auxiliary bracket is vertically moved up and down by the lifting means .

" 형상으로 상호 대응되게 형성되는 것을 특징으로 한다.In addition, the guide projection and the guide groove may have a cross-

Shaped "shape.

A housing having a slide hole formed in a front portion of the main link to slide and protrude therefrom and a lower end fixed to the pedestal; And a control unit.

According to the display position adjusting apparatus of the present invention as described above, the following effects can be obtained.

First, since the angle adjusting means is constituted by the first worm and the first worm gear, the rotation of the first worm and the first worm gear allows the rotation motor to be unloaded , There is an effect of preventing the angle from being lowered due to the load of the display while being not rotated in the reverse direction.

Second, since the angle adjusting means is constituted by the first worm and the first worm gear, the rotation of the first worm and the first worm gear causes the rotation motor to be unloaded , There is an effect of preventing the angle from being lowered due to the load of the display while being not rotated in the reverse direction.

Third, by installing the tension adjusting means, it is possible to adjust the pressing force for upwardly pushing the auxiliary bracket to adjust according to the load of the display mounted on the main link.

Fourth, since the tension adjusting means is composed of the second worm gear and the second worm, it is possible to prevent reverse rotation, which is a characteristic of the worm and the worm gear, to prevent the tension from being unwound temporarily and to easily rotate the second worm through the tool coupling portion The rotating shaft can be easily rotated, so that the tension can be easily and easily adjusted.

Fifth, by installing the guide means, it is possible to minimize the flow of the auxiliary bracket during the lifting movement by the lifting means.

" 형상으로 상호 대응되게 형성됨으로써, 상기 보조브라켓트(40)의 승강운동시, 전후 좌우로 유동되는 것을 잡아주게 되는 효과가 있다.Sixth, the guide protrusion 91 and the guide groove 92 are formed in the cross-

So that the auxiliary bracket 40 can be moved forward, backward, and laterally when the auxiliary bracket 40 is lifted or lowered.

Seventh, by forming the housing 15, it is possible to prevent foreign matter such as dust from accumulating on the mounted component in the housing 15. [

1 is a conceptual view showing a conventional display platform;
2 is a perspective view illustrating the main driving unit of FIG. 1;
Figs. 3 and 4 are operation diagrams illustrating an angle adjustment state. Fig.
5 is a perspective view illustrating a use state of the display position adjusting apparatus according to an embodiment of the present invention;
6 is a perspective view of a display position adjusting device according to an embodiment of the present invention, in which a housing and a pedestal are removed.
7 is a perspective view of the display position adjusting device according to the embodiment of the present invention, with the housing and the pedestal removed.
FIG. 8 is a partial perspective view illustrating a structure for moving up and down in a display position adjusting apparatus according to an exemplary embodiment of the present invention; FIG.
9 is a perspective view illustrating a configuration of an angle adjusting device in a display position adjusting device according to an embodiment of the present invention.
FIG. 10 is a side view of a display position adjusting device according to an embodiment of the present invention, the angle being adjusted by an angle adjusting device. FIG.
11 is a perspective view and a side sectional view showing the pressing means in the display position adjusting apparatus according to the embodiment of the present invention.
12 is a side view showing a state in which the pressing means is operated by the elevating means in the display position adjusting apparatus according to the embodiment of the present invention.
13 is a perspective view illustrating the configuration of guide means in a display position adjusting apparatus according to an embodiment of the present invention.

The display position adjusting device according to an embodiment of the present invention is characterized in that the display is mounted on the front end and the rear end of the main link, which adjusts the angle by the angle adjusting means, is mounted on the drive motor using a worm and a worm gear, There is an effect of preventing the angle from becoming lower due to the load.

5 to 13, the display position adjusting apparatus according to an embodiment of the present invention includes a pedestal 10, a main bracket 20, an elevating means 30, an auxiliary bracket 40, a main link 50, an angle adjusting means 60, a pressing means 70, a tension adjusting means 80, a guide means 90 and a housing 15.

The pedestal 10 is supported on the floor as shown in FIGS. 5 and 13, and serves to support the present invention on the ground.

The pedestal 10 may be disposed on the lower surface of the housing 15 to support the ground or the like. Alternatively, the pedestal 10 may be mounted on the rear surface of the housing 15 to be mounted on a wall surface or the like have.

The pedestal 10 is engaged with the lower end of the housing 15, which will be described later, as shown in FIG.

A detailed description thereof will be described later.

The main bracket 20 is fixedly mounted on the top of the pedestal 10, as shown in FIGS. 6, 7 and 13.

That is, the main bracket 20 serves as a structure for coupling other components, and is fixedly mounted on the upper surface of the pedestal 10.

The elevating means 30 slides the display T in the vertical direction.

That is, the elevating means 30 moves the auxiliary bracket 40, which will be described later, up and down as shown in FIGS. 6, 7, 12 and 13.

The elevating means 30 includes a lead screw 31 rotatably mounted on the main bracket 20 in the vertical direction as shown in Fig. 13, and a lead screw 31, A drive motor 32 for rotating the lead screw 31, a guide tube 33 formed in a hollow shape as shown in FIGS. 6, 7, and 13 and into which the lead screw 31 is inserted, And an elevating unit (not shown) inserted into the guide pipe 33 and mounted on the thread 65a of the lead screw 31 to perform an elevating motion.

In the present embodiment, the elevating means 30 for moving the auxiliary bracket 40 up and down is moved up and down by the lead screw 31. However, unlike the present embodiment, the chain, the rack and the pinion So that the auxiliary bracket 40 can be moved up and down.

6, 7, 12, and 13, the auxiliary bracket 40 is a portion to which the components moving up and down together with the lifting / lowering movement are lifted and lowered by the lifting and lowering means 30.

6, 7, and 12, the auxiliary bracket 40 is mounted with components for moving up and down and adjusting the angle of the display T while moving up and down by the up and down movement.

6 to 8, 10 and 12, the main link 50 is rotatably hinged to the front of the auxiliary bracket 40 and performs seesaw motion, and the display T is mounted at the front end thereof do.

That is, the main link 50 is coupled to the auxiliary bracket 40 so as to be seesawed, and the viewing angle of the display T mounted on the front side is adjusted by the angle adjusting means 60 described later .

6 to 10, the angle adjusting means 60 sees the main link 50 hinged to the auxiliary bracket 40 mounted on the auxiliary bracket 40.

10, the angle adjusting means 60 may be hinged to the auxiliary bracket 40 to adjust the angle of the main link 50, And controls the viewing angle of the display (T) coupled to the front end of the link (50).

6 to 10, the angle adjusting means 60 includes a body 61, a first worm 62, a first worm 63, a turning motor 64, and a stretching rod 65 .

6 to 10, the lower portion of the body 61 is hinged to the auxiliary bracket 40.

9, the first worm 63 of the first worm gear 62 is formed in the body 61, the rotation motor 64 is mounted on one side of the first worm 62, A rod 65 is mounted.

The first worm gear 62 is rotatably mounted in the body 61 as shown in FIG.

A bolt hole 62a is formed in the first worm 62 so as to be engaged with the first worm 63 described later.

9, a later-described stretchable rod 65 is screwed into the bolt hole 62a, and the stretchable rod 65 is stretched and contracted by the rotation of the first worm gear 62.

The first worm (63) is mounted to engage with the first worm gear (62).

The rotation motor 64 is coupled to the body 61 to rotate the first worm 63.

The extensible rod 65 has a screw thread 65a bolted to the bolt hole 62a at its lower portion and is screwed to the bolt hole 62a and an upper end of the screw rod 65a is hinged to the rear end of the main link 50. [ do.

The first worm gear 62 rotates by the thread 65a coupled to the bolt hole 62a and moves in the vertical direction.

The first worm 63 rotates and the first worm gear 62 engages with the first worm gear 62. The first worm 63 is rotated by the rotation motor 64 in one direction, The main shaft 62 is rotated and contracted by the thread 65a screwed to the bolt hole 62a to elevate the front end of the main link 50 as shown in Fig. 10 (a) The first worm 63 rotates and the first worm gear 62 engaged with the first worm 62 rotates to rotate the bolt hole 62a And the front end of the main link 50 is lowered as shown in FIG. 10 (b) while being extended by the screw threaded screw 65a.

The angle adjusting means 60 is constituted by the first worm 63 and the first worm gear 62 so that the angle of rotation of the first worm 63 and the first worm 62 The rotation of the tilting motor 64 due to the load of the mounted display T is not inflicted and the rotation of the tilting motor 64 is not reversed.

 8 and 11, the pushing means 70 is mounted on both left and right sides of the upper portion of the elevating means 30 and is supported on the left and right sides of the auxiliary bracket 40 which is moved up and down by the elevating means 30 Press both sides upward.

The pressing means 70 includes a case 71, a rotating shaft 72, a spring 73, a take-up reel 74 and a rope 75 as shown in Figs. 8, 11 and 12.

The case 71 is coupled to the upper end of the elevating means 30 as shown in FIG.

11 (b), the rotation shaft 72 and the spring spring 73 are mounted inside the case 71. [

11 (a), one side of the rotation shaft 72 protrudes outwardly of the case 71 and is coupled to the case 71 so as to be rotatable.

The rotation shaft 72 causes the auxiliary bracket 40 to compress or unwind the spiral spring 73 while rotating in the case 71 when the auxiliary bracket 40 is lifted and lowered by the rope 75 as described later.

11 (b), the outer side is fixedly coupled to the inner periphery of the case 71, and the inside is fixed to the other side of the rotation shaft 72, that is, And is compressed by the rotation of the rotation shaft 72. The rotation shaft 72 is rotated by the rotation of the rotation shaft 72.

That is, when the rotary shaft 72 is rotated by an external force, the spring 73 is compressed and then the rotary shaft 72 is rotated when the external force is removed.

The take-up reel 74 is mounted on one side of the rotation shaft 72, that is, a portion protruding outwardly from the rotation shaft 72 mounted on the case 71.

The take-up reel 74 is a part that causes one end of the rope 75, which will be described later, to be wound and unwound by the rotation of the rotation shaft 72.

The rope 75 is wound around the take-up reel 74 at one end and coupled to the auxiliary bracket 40 at the other end as shown in FIGS.

When the auxiliary bracket 40 is lifted and lowered by the lifting means 30, the rope 75 is rotated by the lifting reel 74 while rotating the rotating shaft 72, The auxiliary bracket 40 is pulled upward to compress the auxiliary bracket 40 in the upward direction by the compression force of the spring spring 73.

12 (b), when the auxiliary bracket 40 is lowered by the lifting means 30, the rope 75 is released from the winding spring 73 The auxiliary bracket 40 is compressed to upwardly push the auxiliary bracket 40 upward and when the auxiliary bracket 40 is lifted by the lifting means 30, The rope 75 is pulled by the spool 73 while the rope 75 is wound on the take-up reel 74 to pull the auxiliary bracket 40 upward.

12 (b), the rope 75 is unwound from the take-up reel 74 so that the rotation of the rotatable shaft 75 is stopped when the auxiliary bracket 40 is lowered, When the auxiliary bracket 40 is lifted up, as shown in FIG. 12 (a), while the auxiliary bracket 40 is lowered, the auxiliary bracket 40 is compressed The rope 75 is wound on the take-up reel 74 by the compression force of the spring spring 73 to pull the auxiliary bracket 40 upward.

When the winding spring 73 of the pressing means 70 is lowered by the auxiliary bracket 40 and the rope 75 is unwound from the take-up reel 74, the rotation shaft 72 is rotated The auxiliary bracket 40 and the elevating means 30 are brought into close contact with each other in the upward direction so that the auxiliary bracket 40 is pressed by the load of the display T, The auxiliary bracket 40 is lowered while the auxiliary bracket 40 is lifted and the rope 75 is compressed by the compressive force of the spring spring 73 compressed while the auxiliary bracket 40 is lowered, The load on the display T is reduced by the compression force of the spring springs 73 by pulling the auxiliary bracket 40 while being wound on the lifting device 74, There is no excessive load on Do not.

The tension adjusting means 80 is mounted on the pressing means 70 to adjust the tension of the spring 73 as shown in FIG.

That is, the tension adjusting means 80 adjusts the tension of the spring springs 73 that press the auxiliary spring 40 upward.

By mounting the tension adjusting means 80 as described above, the pressing force for pressing the auxiliary bracket 40 upward can be adjusted to adjust the load on the display T mounted on the main link 50.

The tension adjusting means 80 includes a second worm 81 and a second worm 82 as shown in Figs. 8 and 11 (a).

The second worm gear 81 is coupled to one side of the rotating shaft 72.

The second worm 82 is coupled to the elevating means 30 such that a tool engaging portion 82a is formed at one side thereof and engaged with the second worm gear 81. [

The second worm 82 rotates to rotate the second worm gear 81 so that the tension of the spring springs 73 of the pressing means 70, that is, the auxiliary brackets 40, .

As described above, since the tension adjusting means 80 includes the second worm 81 and the second worm 82, it is possible to prevent reverse rotation, which is a characteristic of the worm and the worm gear, The rotation shaft 72 can be easily rotated by rotating the shaft 82 easily through the tool engagement portion 82a, so that the tension can be easily and easily adjusted.

The guide means 90 guides the auxiliary bracket 40, which is moved up and down by the elevating means 30, as shown in FIG.

The guide means 90 includes a guide projection 91 and a guide groove 92.

The guide protrusion 91 is formed to be long in the vertical direction of the elevating means 30.

The guide groove 92 is formed in the auxiliary bracket 40 so that the guide protrusion 91 is inserted and slid.

When the auxiliary bracket 40 is lifted and lowered by the lifting means 30 in the vertical direction, the guide means 90 slides along the guide protrusion 91 inserted in the guide groove 92 Thereby preventing the auxiliary bracket 40 from flowing.

By mounting the guide means 90 in this way, it is minimized that the auxiliary bracket 40 is prevented from flowing during the lifting movement by the lifting means 30. [

" 형상으로 상호 대응되게 형성된다.The guide projections 91 and the guide grooves 92 of the guide means 90 have a cross-

Quot; shape.

" 형상으로 상호 대응되게 형성됨으로써, 상기 보조브라켓트(40)의 승강운동시, 전후 좌우로 유동되는 것을 잡아주게 된다.As described above, the guide protrusion 91 and the guide groove 92 are formed in the cross-

So that the auxiliary bracket 40 can be moved forward, backward, leftward and rightward when the auxiliary bracket 40 is lifted and lowered.

5, a slide hole 16 is formed in the housing 15 so that the main link 50 protrudes and slides in a vertical direction to enclose the components, .

The slide hole 16 is formed in the vertical direction so that the elevation means 30 can perform seesaw motion and elevation movement of the front end of the main link 50 when the elevation means 30 performs seesaw motion and elevation / do.

In the housing 15, speakers may be formed on both sides as required.

By configuring the housing 15 as described above, it is possible to prevent foreign matter such as dust from accumulating on the components installed inside the housing 15. [

The display position adjusting device of the present invention is not limited to the above-described embodiment, but can be variously modified and embodied within the scope of the technical idea of the present invention.

10: pedestal 15: housing 16: slide ball
20: main bracket 30: elevating means 31: lead screw
32: drive motor 33: guide tube 40: auxiliary bracket
50: main link 60: angle adjusting means 61: body
62: first worm gear 62a: bolt hole 63: first worm
64: rotating motor 65: extensible rod 65a: threaded
70: pressing means 71: case 72: rotating shaft
73: spring-loaded spring 74: retractable reel 75: rope
80: tension adjusting means 81: second worm gear 82: second worm
82a: tool engagement portion 90: guide means 91: guide projection
92: Guide groove T: Display

Claims (7)

A pedestal 10;
A main bracket 20 fixedly mounted on the top of the pedestal 10;
Elevating means (30) vertically mounted on the main bracket (20);
An auxiliary bracket 40 for vertically moving up and down by the elevating means 30;
A main link 50 rotatably hinged to the front of the auxiliary bracket 40 for seesaw motion and having a front end mounted with a display T;
Angle adjusting means (60) for adjusting the angle of the main link (50) mounted on the auxiliary bracket (40) and seesawing by hinge coupling; ≪ / RTI >
The angle adjusting means (60)
A body (61) hinged to the auxiliary bracket (40);
A first worm gear 62 rotatably mounted in the body 61 and having a bolt hole 62a formed therein;
A first worm (63) engaged with the first worm gear (62);
A rotating motor (64) coupled to the body (61) and rotating the first worm (63);
A stretch rod 65 having a thread 65a formed at a lower portion thereof and coupled to the bolt hole 62a and hinged to a rear end of the main link 50; Lt; / RTI >
When the first worm gear 62 rotates by the rotation of the rotation motor 64, the extensible rod 65 moves up and down by the thread 65a coupled to the bolt hole 62a, The angle of the main link 50 is adjusted,
And pressing means 70 mounted on both left and right sides of the upper end of the elevating means 30 to press the left and right sides of the auxiliary bracket 40 upward and downward by the elevating means 30 upward However,
The pressing means (70)
A case 71 coupled to an upper portion of the elevating means 30;
A rotary shaft 72 having one side projecting outwardly of the case 71 and rotatably coupled to the case 71;
(73) fixed to the inner circumference of the case (71) and having an inner side coupled to the other side of the rotating shaft (72) and being compressed by rotation of the rotating shaft (72);
A take-up reel 74 coupled to one side of the rotating shaft 72;
And a rope (75) whose one end is wound on the take-up reel (74) and the other end is coupled to the auxiliary bracket (40)
When the auxiliary bracket 40 is lowered, the winding spring 73 is rotated while the rotation shaft 72 is rotated while the rope 75 is unwound from the take-up reel 74, And pulls the auxiliary bracket (40) while the rope (75) is wound on the take-up reel (74) by the compressed compressive force while descending upon the rising of the auxiliary bracket (40) Worm gear type display position adjusting device. delete The method according to claim 1,
And a tension adjusting means (80) mounted on the pressing means (70) for adjusting a tension of the spring springs (73). The method of claim 3,
The tension adjusting means (80)
A second worm gear 81 coupled to one side of the rotation shaft 72;
A second worm (82) formed at one side thereof with a tool engaging portion (82a) and coupled to the elevating means (30) so as to be engaged with the second worm gear (81); Lt; / RTI >
Wherein when the second worm (82) is rotated, the second worm gear (81) rotates to rotate the rotation shaft (72) to adjust the tension of the spring springs (73). The method according to claim 1,
Guide means (90) for guiding the auxiliary bracket (40) which is moved up and down by the elevating means (30); , ≪ / RTI >
The guide means (90)
A guide projection 91 formed in the vertical direction of the elevating means 30;
A guide groove 92 formed in the auxiliary bracket 40 and slidably inserted with the guide protrusion 91; Lt; / RTI >
The auxiliary bracket 40 is slid along the guide protrusion 91 inserted in the guide groove 92 when the auxiliary bracket 40 is moved up and down by the lifting means 30, So as to prevent the auxiliary bracket (40) from flowing. The method of claim 5,
The guide projections 91 and the guide grooves 92 are formed on the cross-

&Quot;, and "L " The method according to claim 1,
A housing (15) having a slide hole (16) slidably protruding from the main link (50) and having a lower end fixed to the pedestal (10); Wherein the worm gear-type display position adjusting device includes:

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