KR200279161Y1 - Friction hinge device - Google Patents

Abstract

The friction hinge device according to the present invention includes: a pipe spring having a curling portion in the form of a closed curve forming a lower downward protrusion and a central hole; A rotating shaft having a first shaft portion pushed through the center hole of the pipe spring and a second shaft portion extending from the first shaft portion; And a housing having an axial hole into which the rotating shaft is inserted and a slot into which the downward protrusion of the pipe spring is fixedly fitted. According to this structure, since the pipe spring is composed of one component, the number of components can be reduced, the assemblability can be improved, and the productivity can be improved. In addition, the curling portion in the form of a closed curve can be obtained a more stable torque, it is possible to smoothly open and close the object.

Description

Friction hinge device {FRICTION HINGE DEVICE}

The present invention relates to a hinge device used to hold an object at a constant position or angle, and more particularly to a friction hinge device also called a torque hinge device.

The friction hinge device is very useful for, for example, keeping the display of a notebook computer at an angle with respect to the main body. That is, in the case of the notebook computer, the friction hinge device is coupled to the main body to enable the opening and closing of the cover in the vertical direction, and the cover by the pressing force, such as a spring embedded in the friction hinge device when the cover is opened. It serves to keep the at a proper angle to the body. At the same time, the friction hinge device generates dynamic torque due to friction when an object such as a cover of a notebook computer moves or rotates, thereby suppressing sudden movement of the object and cushioning an impact.

Recently, the friction hinge device has been developed to realize a structure in which the friction area and the pressing force of the spring can be adjusted at the same time so that a constant magnitude of friction force is always generated, and FIGS. 1 and 2 illustrate an example of such a friction hinge device. .

As shown in FIGS. 1 and 2, a general friction hinge device includes two pipe springs 10, 10 ′, a rotating shaft 20, a housing 30, and a wing 40.

The pipe springs 10, 10 ′ are inserted into the axial holes 31 of the housing 30 together with the rotary shaft 20 while being pressed onto the rotary shaft 20 and fixed to the housing 30. The rotary shaft 20 has a first shaft portion 21 inserted into the housing 30 and a second shaft portion 22 protruding out of the housing 30. The wing 40 is coupled to the second shaft portion 22, and the wing 40 is coupled to the cover of the notebook computer, for example, by screwing or the like. In this case, the housing 30 is similarly coupled to the body of the notebook computer by screwing or the like.

The pipe springs 10 and 10 'each have a curling portion 11 forming a center hole into which the rotation shaft 20 is inserted, and downward projections 12 integrally extending therefrom. Each of the curling portions 11 is formed with a slit 13 that is open in the radial direction. These pipe springs 10, 10 ′ are provided with the housing 30 together with the rotation shaft 20 in a state where their radial slits 13 are fitted to the first shaft portion 21 of the rotation shaft 20 in opposite directions. Is inserted into the axial hole (31). At this time, the pipe springs 10, 10 ′ are formed by force and shape engagement thereof with their downward protrusions 12 fitted into the slots 32 in the lower portion of the axial hole 31 of the housing 30. It is fixed in the housing 30 so that rotation is impossible. Meanwhile, although not specifically illustrated, an oil groove is formed on an inner circumferential surface of the center hole of the pipe springs 10 and 10 ', and the oil groove is filled with lubricating oil so that the rotating shaft 20 is rotated when the rotating shaft 20 is rotated. The frictional resistance between the outer circumferential surface of 20 and the inner circumferential surface of the central hole of the pipe springs 10 and 10 'is reduced.

In the friction hinge device as described above, when the rotating shaft 20 rotates, for example, when the cover of the notebook computer is opened, the rotating shaft 20 generates torque due to friction with the pipe springs 10 and 10 '. Rotating while receiving, thereby reducing the sudden operation of the rotation and shock absorbing effect is made. 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 pipe springs 10 and 10 '. When closing the open cover, the same operation is performed in the same way. Here, the torque according to the rotation direction at the time of opening and closing of the cover is always constant. That is, since the radial slits 13 of the pipe springs 10 and 10 'are fitted to the rotation shaft 20 so as to be located in opposite directions, torque of the same magnitude is generated in both directions of the rotation direction.

However, the conventional friction hinge device as described above has two pipe springs 10 and 10 'separated from each other, so there is a problem that the number of components is large, and the first and second separated Since the process of press-fitting the pipe springs 10 and 10 'to the rotary shafts 20 must be repeated, the assembly is deteriorated.

In addition, in the conventional friction hinge device, since the curling portion 13 of each of the pipe springs 10 and 10 'includes the radial slit 13, the torque appears unstable, so that the opening and closing operation of the object is prevented. Another problem is that it is not smooth.

The present invention has been made in view of the above, and provides a friction hinge device that can improve the assemblability by reducing the number of components and at the same time have a more stable torque to smoothly open and close the object. The purpose is.

1 is an exploded view of a conventional friction hinge device,

Figure 2 is a side view of the housing of the conventional friction hinge device shown in Figure 1,

3 is an exploded view of a friction hinge device according to an embodiment of the present invention,

Figure 4 is a side view of the housing of the friction hinge device according to an embodiment of the present invention shown in Figure 3,

5 and 6 are assembled front and side views of the friction hinge device according to an embodiment of the present invention shown in FIG.

7a and 7b is a front view and a side view showing a pipe spring of the friction hinge device according to an embodiment of the present invention, and

FIG. 8 is a view showing an oil groove formed in the inner circumferential surface of the curling portion of the pipe spring shown in FIG. 7.

<Description of Symbols for Main Parts of Drawings>

Pipe spring 11; curling part

12; downward projection 20; rotary shaft

21; first shaft portion 22; second shaft portion

30; housing 31; axial hole

32; slot 40; wing

Friction hinge device according to the present invention for achieving the above object, one pipe spring having a curling portion in the form of a closed curve forming a lower downward projection and the center hole; A rotating shaft having a first shaft portion pushed through the center hole of the pipe spring and a second shaft portion extending from the first shaft portion; And a housing having an axial hole into which the rotating shaft is inserted and a slot into which the downward protrusion of the pipe spring is fixedly fitted.

According to this structure, since the pipe spring is composed of one component, the number of components can be reduced and the assemblability can be improved, and since the curling part of the pipe spring has a closed curve shape, a stable torque is always exerted. Opening and closing operation of the object is made more smoothly.

According to a preferred embodiment of the present invention, the wing is coupled to the second shaft portion of the rotating shaft, and the inner groove of the central hole of the pipe spring is provided with an oil groove consisting of a plurality of micro grooves.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

3 is an exploded view of a friction hinge device according to an embodiment of the present invention, Figure 4 is a side view of the housing of the friction hinge device according to an embodiment of the present invention shown in Figure 3, Figures 5 and 6 Front and side views of an assembled state of the friction hinge device according to an embodiment of the invention, Figure 7a and 7b is a front view and a side view showing a pipe spring of the friction hinge device according to an embodiment of the present invention, and Figure 8 is a pipe The oil groove of the spring is shown. For reference, in describing the embodiments of the present invention, the same reference numerals refer to the same parts as those in the prior art.

As shown in Figure 3 to 8, the friction hinge device according to an embodiment of the present invention, one pipe spring 10, a rotating shaft 20, the housing 30 and the wing 40 is provided.

As shown in FIGS. 7A, 7B and 8, the pipe spring 10 is formed by integrally forming a downward curved portion 12 and a curling portion 11 in the form of a closed curve forming a center hole. That is, in the related art, the first and second pipe springs each having radial slits are separately formed as separate parts, but the present invention has a curling part integrated into one and at the same time, the curling part has a closed curve shape without the slits. There is a characteristic to be formed. Therefore, the pipe spring 10 can be press-fitted to the rotating shaft 20 by one assembly process, and since the curling part does not have a slit, it always exhibits a stable torque. In addition, the inner circumferential surface of the curling portion 11 of the pipe spring 10 is formed with an oil groove 14 consisting of a plurality of micro grooves, the oil groove 14 is filled with lubricating oil. Therefore, the frictional resistance between the outer circumferential surface of the rotating shaft 20 and the inner circumferential surface of the central hole of the pipe spring 10 can be reduced when the rotating shaft 20 rotates, so that smooth operation can be achieved.

In manufacturing the pipe spring 10 according to the present invention as described above, the plate member of a predetermined size is produced by bending to form a curling portion of the closed curve shape. As such, the pipe spring 10 according to the present invention can be manufactured by a simple method of forming a plate member. In addition, a method of joining two members having two divided curling portions and a downwardly projecting portion to face each other is possible.

The rotary shaft 20 includes a first shaft portion 21 and a second shaft portion 22. The first shaft portion 21 is inserted into the axial hole 31 of the housing 30 with the pipe spring 10 fitted therein, and the second shaft portion 22 protrudes out of the housing 30. . The wing 40 is coupled to the second shaft portion 22, and the wing 40 is coupled to the cover of the notebook computer, for example, by screwing or the like. In this case, the housing 30 is similarly coupled to the body of the notebook computer by screwing or the like.

The housing 30 has a slot 32 in which the downward projection 12 of the pipe spring 10 is fitted in the lower portion of the axial hole 31.

In the friction hinge device according to the present invention configured as described above, first, the pipe spring 10 is inserted into the first shaft portion 21 of the rotating shaft 20, and the first shaft portion 21 is coupled to the shaft of the housing 30. Assembled in the direction hole 31. Then, the pipe spring 10 is fixed in the housing 30 such that its downward protrusion 12 is forcefully and shape-fitted into the slot 32 of the housing 30 so as not to rotate. In addition, the wing 40 is coupled to the second shaft portion 22 of the rotation shaft 20.

In the friction hinge device of the present invention assembled as described above, for example, the wing 40 is coupled to the cover of the notebook computer, and the housing 30 is coupled to the main body by screwing or the like, respectively.

In the case of opening the cover of the notebook computer, the rotating shaft 20 is rotated while receiving a torque due to friction with the pipe spring 10, thereby suppressing a sudden rotational motion and cushioning the impact. 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 pipe spring 10. When closing the open cover, the same operation is performed in the same way. In the friction hinge device according to the present invention when opening and closing the cover as described above, since the curling part 11 in frictional contact with the rotating shaft 20 takes the form of a closed curve, the friction area and the tightening elasticity are constant, so that a stable torque is always obtained. Therefore, the opening and closing operation of the cover can be made more smoothly.

According to the present invention as described above, since the pipe spring is composed of one component, the number of component parts can be reduced, the assemblability can be improved, and the productivity can be improved. In addition, the curling portion in the form of a closed curve can be obtained a more stable torque, it is possible to smoothly open and close the object.

Hereinafter, the present invention has been described and illustrated with reference to a preferred embodiment for illustrating the principles of the present invention, but the present invention is not limited to the configuration 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, modifications, and equivalents should be considered to be within the scope of the present invention.

Claims (3)

A pipe spring having a closed curved curling portion forming a lower downward protrusion and a central hole; A rotating shaft having a first shaft portion pushed through the center hole of the pipe spring and a second shaft portion extending from the first shaft portion; And And a housing having an axial hole into which the rotating shaft is inserted and a slot into which the downward projection of the pipe spring is fixedly fitted. The method of claim 1, Friction hinge device, characterized in that the wing is coupled to the second shaft portion of the rotating shaft. The method according to claim 1 or 2, Friction hinge device, characterized in that the inner circumferential surface of the central hole of the pipe spring is provided with an oil groove consisting of a plurality of micro grooves.