KR100485373B1 - Hinge device for lcd monitor - Google Patents

Abstract

According to an aspect of the present invention, there is provided a hinge device for a liquid crystal monitor, comprising: a first hinge bracket having a shaft portion and a pair of first fixing portions extending from both ends of the shaft portion and coupled to a monitor main body; A second hinged bra with a curling portion formed with an axial hole having a second fixing portion coupled to the stand and a slit into which the shaft portion of the first hinge bracket is inserted by rolling in one direction from the second fixing portion. Kits; And rotation angle maintaining means for maintaining an adjusted rotation angle when adjusting the rotation angle of the first hinge bracket with respect to the second hinge bracket. The hinge device according to the present invention generates torque differential in both directions of the first hinge bracket rotation direction by the gap difference between the slits of the curling portions of the second hinge bracket without using a separate torsion spring as in the prior art. You can. Therefore, since the number of component parts can be reduced as compared with the related art, cost reduction and assemblability can be improved, thereby enabling mass production.

Description

Hinge device for LCD monitors {HINGE DEVICE FOR LCD MONITOR}

The present invention relates to a hinge device, and more particularly, to a hinge device for a liquid crystal monitor.

Recently, a liquid crystal monitor, which is widely used as a display device, is capable of adjusting an angle of a monitor main body 1, a stand 2, and the monitor main body 1 in a desired direction with respect to the stand 2 as illustrated in FIG. And a hinge device 3 fixed to each other.

As the hinge device 3, a friction hinge device as shown in FIG. 2 is currently used due to various advantages, and the hinge device 3 includes a housing 10, a rotating shaft 20, and a torsion spring 30. Include.

The housing 10 has an axial hole 11 and a fixed slot 12 formed in the lower portion of the axial hole 11. The rotating shaft 20 has a cylindrical portion 21 inserted into the axial hole 11 of the housing 10 and a fixing portion 22 extending from the cylindrical portion 21. A screw hole 22a is formed in the fixing part 22, and the rotating shaft 20 is coupled to the monitor main body 1 by a screw (not shown) fastened through the screw hole. The housing 10 is similarly coupled to the stand 2 by screwing or the like.

The torsion spring 30 is composed of a plurality of clip-shaped leaf springs, which are inserted into the housing 10 by being inserted into the axial hole 11 of the housing 10 together with the rotating shaft 20 while being pressed against the rotating shaft 20. It is fixed. At this time, the torsion spring 30 is fixed to the housing 10 such that the downward protrusion 32 in the direction of the arrow formed at the bottom thereof is fitted to the fixing slot 12 of the housing 10. On the other hand, two oil grooves 31 opposed to each other are formed on the inner circumferential surface of the central hole of the torsion spring 30, and the oil grooves 31 are filled with lubricating oil. Therefore, the frictional resistance generated between the outer circumferential surface of the rotating shaft 20 and the inner circumferential surface of the central hole of the torsion spring 30 when the rotating shaft 20 is rotated can be reduced.

The hinge device configured as described above allows the rotating shaft 20 to rotate while receiving a torque caused by friction with the torsion spring 30 when the rotating shaft 20 rotates (for example, when adjusting the screen angle of the LCD monitor). As a result, the shock is cushioned while sudden rotation is suppressed. Subsequently, when the rotation is stopped at a constant rotation angle, the rotation shaft 20 is fixedly held at the position of the angle by the pressing force based on the tightening elasticity of the torsion spring 30. At this time, since the torsion spring 30 is fixed to the housing 10 to prevent rotation, generation of torque due to friction is ensured while the rotation shaft 20 rotates, whereas the torsion spring 30 is closed. Since it is formed in the shape of a circle to stably support the rotation of the rotation shaft 20 and at the same time the frictional resistance is reduced by lubrication of oil, the rotation of the rotation shaft 20 is made smoothly.

However, the hinge device for a general liquid crystal monitor as described above has a structure that generates torque by using a plurality of torsion springs 30 in the form of a closed circle, thereby increasing the cost of using a plurality of torsion springs and There is a problem that it is difficult to cope with mass production due to deterioration of the assembly.

In addition, the hinge device as described above has a disadvantage in that torque is generated in the same size in both directions of the rotational direction, so that torque cannot be freely adjusted in a desired direction. In particular, in order to easily fix and hold a monitor or the like at an appropriate angle, it is necessary to generate differential torques in both directions of rotation, but conventionally it is impossible to adjust the torque at all.

In order to solve such a problem, there is a friction hinge device disclosed in Korean Utility Model Registration No. 20-0190936. The hinge device has a torsion spring having a two-split structure, and a torque adjusting C-type clip having a radially open slit and having a shape that gradually increases or decreases in thickness in the circumferential direction. Such a hinge device can facilitate the assembly of the torsion spring and the c-type clip by the two-split structure of the torsion spring and the slit of the c-type clip. Since it is formed in a decreasing shape, it is possible to generate torques of different sizes in both directions of the rotational direction, providing the advantage that it is possible to adjust the torque as desired as required.

However, even in the improved hinge device as described above, it is divided into two but still uses a large number of torsion springs, and moreover, because a separate c-type clip is used to generate a differential torque, the cost rises or the assembly is poor. It is not completely solved.

The present invention has been made in view of the above, and it is possible to generate differential torque in both directions of rotation without using a torsion spring, thereby reducing costs and improving assembly performance due to the reduction of the number of components. It is an object of the present invention to provide a hinge device for a liquid crystal monitor.

The hinge device for a liquid crystal monitor according to the present invention for achieving the above object is fixed to the liquid crystal monitor main body so as to adjust the vertical rotation angle with respect to the stand, and is formed extending on both ends of the shaft portion and the shaft portion, the monitor body A first hinge bracket having a pair of first fixing parts coupled to the first hinge bracket; And a second curling portion having an axial hole having a second fixing portion coupled to the stand and a slit into which the shaft portion of the first hinge bracket is inserted by rolling in one direction from the second fixing portion. Hinge brackets.

According to a preferred embodiment of the present invention, the hinge device for a liquid crystal monitor further comprises a rotation angle maintaining means for maintaining an adjusted rotation angle when adjusting the rotation angle of the first hinge bracket with respect to the second hinge bracket. .

The rotation angle holding means may include a stopper hole formed at the center of the curling portion of the second hinge bracket; And a stopper pin coupled to a hole formed in a central portion of the shaft portion of the first hinge bracket so as to be received in the stopper hole.

The stopper hole has a size corresponding to a rotation angle of about 35 ° from the radial center O of the curling part, and is about 5 ° above and below the axial center C of the curling part. It is positioned at a size ratio corresponding to a rotation angle of about 30 °.

In addition, a plurality of oil grooves may be formed in the shaft portion of the first hinge bracket.

The hinge device according to the present invention generates torque differential in both directions of the first hinge bracket rotation direction by the gap difference between the slits of the curling portions of the second hinge bracket without using a separate torsion spring as in the prior art. You can. Therefore, since the number of component parts can be reduced as compared with the related art, cost reduction and assemblability can be improved, thereby enabling mass production.

The above objects and other advantages of the present invention will become more apparent by describing the preferred embodiment of the present invention in detail with reference to the accompanying drawings.

3 is an exploded perspective view showing a hinge device for a liquid crystal monitor according to an embodiment of the present invention, FIG. 4 is an assembled perspective view of FIG. 3, and FIGS. 5A and 5B are front and side views of FIG. 4.

As shown in Figure 3 to 5b, the hinge device for a liquid crystal monitor according to an embodiment of the present invention, the first hinge bracket 100, the second hinge bracket 200 and the rotation angle holding means 300 ).

The first hinge bracket 100 includes a central cylindrical shaft portion 110 and a pair of first fixing portions 120 extending from both sides of the shaft portion 110. Both sides of the first fixing part 120 are chamfered, and are provided with a plurality of screw holes 121. In addition, a plurality of oil grooves 111 are formed at predetermined intervals in the shaft portion 110. In addition, a pin hole 112 is formed at an approximately center portion of the shaft 110. This pin hole 112 is mentioned later.

The first hinge bracket 100 is coupled to, for example, a liquid crystal monitor main body 1 (see FIG. 1), and includes a plurality of screws fastened through the screw holes 121 of the first fixing part 120. To the monitor body. Meanwhile, in the illustrated example, the first hinge bracket 100 shows an example in which the shaft portion 110 and the pair of first fixing portions 120 are integrally formed, but the shaft portion 110 is considered in consideration of assembly and production. ) And the first fixing part 120 are formed separately and may be combined by welding or the like, but the manufacturing method is not necessarily limited to the case of the illustrated example.

The second hinge bracket 200 includes a second fixing part 220 and a curling part 210. A plurality of screw holes 221 are formed in the second fixing part 220, and the second hinge brackets 200 are formed by a plurality of screws (not shown) fastened through the screw holes 221. Is coupled to the monitor stand 2: (see FIG. 1).

The curling part 210 has an axial hole 211 into which the shaft portion 110 of the first hinge bracket 100 is inserted, and the axial hole 211 has a predetermined slit 211a. The curling part 210 is formed by rolling a portion extending from the second fixing part 220 in one direction.

The rotation angle maintaining means 300 serves to maintain the adjusted rotation angle when the rotation angle of the first hinge bracket 100 relative to the second hinge bracket 200 is adjusted. The rotation angle maintaining means 300 is a stopper hole 310 formed in the center of the curling portion 210 of the second hinge bracket 200, and the first hinge bracket to be accommodated in the stopper hole (310). It includes a stopper pin 320 coupled to the pin hole 112 formed in the central portion of the shaft 110 of 100.

The stopper hole 310 is formed to have a size corresponding to a rotation angle of about 35 ° from the radial center O of the curling part 210. Preferably, the stopper hole 310 is positioned at a size ratio corresponding to a rotation angle of about 5 ° to the top and 30 ° to the bottom of the axial center C of the curling part 210. It is good to be.

In the hinge device according to the present invention as described above, the shaft portion 110 of the first hinge bracket 100 is inserted into the axial hole 211 of the curling portion 210 of the second hinge bracket 200 to be assembled. The first fixing part 120 of the first hinge bracket 100 is coupled to the monitor main body, and the second fixing part of the second hinge bracket 200 is coupled to the monitor stand, respectively.

When the monitor body is rotated upward and downward in order to adjust the screen angle of the monitor, that is, when the monitor body is rotated upward, the shaft portion 110 of the first hinge bracket 100 becomes the second hinge bracket 200. In the axial hole 211 of the curling portion 210 of the c) is rotated in the opposite direction of the curling direction of the curling portion 210, thereby increasing the interval of the slit 211a of the axial hole 211, the first hinge Bracket 100 is smoothly rotated upwards.

When the rotation of the monitor main body is stopped, the first hinge bracket 100 tries to rotate downward due to the weight of the monitor main body or the like, but is the same as the curling direction of the curling unit 210, and thus, a strong tightening elastic force by the curling unit 210. The first hinge bracket 100 acts on the first hinge bracket 100 so as not to rotate and maintain the state.

As described above, the present invention can freely adjust the rotation angle of the monitor main body while generating differential torque in both directions of rotation by the curling part 210 of the second hinge bracket 200.

According to the present invention as described above, the differential torque in both directions of the first hinge bracket rotation direction is generated by the difference in the slit of the curling portion of the second hinge bracket without using a separate torsion spring as in the prior art. Let's do it. Therefore, since the number of component parts can be reduced as compared with the related art, cost reduction and assemblability can be improved, thereby resulting in mass production.

While the invention has been shown and described in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

1 is a side view schematically showing a general liquid crystal monitor,

FIG. 2 is a partially cutaway perspective view showing a hinge device used in the general liquid crystal monitor shown in FIG.

3 is an exploded perspective view showing a hinge device for a liquid crystal monitor according to an embodiment of the present invention;

4 is an assembled perspective view of FIG. 3, and

5A and 5B are front and side views of FIG. 4.

<Description of Symbols for Main Parts of Drawings>

100; first hinge bracket 110; shaft

111; oil groove 112; pin ball

120; first fixing part 200; second hinge bracket

210; curling part 220; first fixing part

221; screw hole 300; rotation angle maintenance means

310; stopper ball 320; stopper pin

Claims (5)

A hinge device for fixing the liquid crystal monitor main body to adjust its vertical rotation angle with respect to the stand. A first hinge bracket having a shaft portion and a pair of first fixing portions extending from both ends of the shaft portion and coupled to the monitor body; And A second hinge with a curling portion having an axial hole having a second fixing portion coupled to the stand and a slit into which the shaft portion of the first hinge bracket is inserted by rolling in one direction from the second fixing portion Bracket kit; hinge device for a liquid crystal monitor comprising a. The method of claim 1, And a rotation angle maintaining means for maintaining the adjusted rotation angle when adjusting the rotation angle of the first hinge bracket with respect to the second hinge bracket. The method of claim 2, The rotation angle holding means may include a stopper hole formed at the center of the curling portion of the second hinge bracket; And a stopper pin coupled to a hole formed at a central portion of the shaft portion of the first hinge bracket so that the stopper hole is accommodated in the stopper hole. The method of claim 3, wherein The stopper hole has a size corresponding to a rotation angle of about 35 ° from the radial center O of the curling part, and is about 5 ° above and below the axial center C of the curling part. The hinge device for a liquid crystal monitor, characterized in that positioned at a size ratio corresponding to a rotation angle of about 30 °. The method according to any one of claims 1 to 4, A hinge device for a liquid crystal monitor, characterized in that a plurality of oil grooves are formed in the shaft portion of the first hinge bracket.