KR100662525B1 - Hinge mechanism for cellular terminal having structure for preventing abrasion - Google Patents

Abstract

A hinge device for a communication terminal having an anti-wear structure is disclosed. The disclosed hinge device includes a rotating cam having a first recess and a first protrusion formed in a circular shape, and a first cover member coupled to the rotating cam by forming a shape of covering the first recess and the first protrusion with a material of higher hardness than the rotating cam. A second cam portion corresponding to the first recess portion and a second cam portion corresponding to the first protrusion portion are formed in a circular shape, and a material having a hardness higher than that of the fixed cam, covering the second protrusion portion and the second recess portion. It is coupled to the fixed cam and has a second cover member in contact with the first cover member. Such a hinge device is intended to prevent the cam member from being worn and the life of the hinge device is shortened by coupling the wear resistant material having high hardness to the contact surfaces of the two cam members.

Terminal, hinge device, cam

Description

Hinge MECHANISM FOR CELLULAR TERMINAL HAVING STRUCTURE FOR PREVENTING ABRASION}

1 is an exploded perspective view showing a communication terminal in which a conventional hinge device is installed;

2 is an exploded perspective view of the hinge device shown in FIG.

3 is an exploded perspective view of a hinge device according to an embodiment of the present invention;

Figure 4 is a perspective view of the engaged state of the hinge device shown in FIG.

5 is a longitudinal sectional view of the hinge device shown in FIG. 4;

Figure 6 is a longitudinal cross-sectional view of the use state of the hinge device shown in FIG.

7 is a longitudinal cross-sectional view of the hinge apparatus shown in FIG. 3 applied to a portable terminal;

8 is a longitudinal cross-sectional view of the using state of FIG. 7.

<Explanation of symbols for main parts of drawing>

200: hinge device 210: housing

220: rotating cam 222: first main part

224: first protrusion 226: first main part

228: guide shaft 230: connecting shaft

240: fixed cam 242: second projection

244: Second lady 246: Second lady

248: guide hole 260: first cover member

262: first wing 264: through the first through

270: second cover member 272: second wing

274: second through hole 280: compression spring

The present invention relates to a hinge device for a communication terminal having a wear protection structure, in particular by combining a high hardness wear-resistant material to the contact surface of the two cam members, to prevent the cam member is worn and the life of the hinge device is shortened. It is for.

Korean Patent No. 404801 discloses a cover hinge device of a mobile phone. The communication terminal provided with such a hinge apparatus is shown in FIG.

The housing 412 is fixed to the folder 410, and a hinge device for applying a braking force to the folder 410 is inserted into the housing 412 in a state where the folder 410 is closed and opened at a predetermined angle. In the housing 412, the insertion hole 414 into which the hinge device is inserted and fixed is opened in one direction, and the rotation shaft 416 protrudes in the other direction.

2 is an exploded perspective view of the hinge device shown in FIG.

The hinge device shown in this figure includes a holder portion 412 fixed to the cover 410, a housing 300 fixed to the holder portion 412, and a rotation slip portion rotatably inserted into the housing 300. 320, a fixed slip portion 330 rotatably inserted into the housing 300 to elastically contact the rotary slip portion 320, and a fixed slip portion 330 held in the housing 300. A spring 340, a first support part 402 formed in the main body 400 to fix the rotary slip part 320, and formed in the main body 400 to rotatably support one side of the holder part 412. And a second support 406.

The holder 412 has an insertion hole 414 in which the housing 300 is inserted and fixed in one direction is opened, and the rotation shaft 416 protrudes in the other direction.

The housing 300 has an inner space 302 open at one side, a through hole 304 is formed at one end thereof, and a protrusion 306 is formed at an inner side of the other end thereof.

In addition, the rotating slip part 320 is provided with a coupling shaft 322 passing through the through hole 304, and a coupling shaft 324 is formed at the center of the side opposite to the coupling shaft 322. A male cam portion 326 having a cam protrusion 328 protruding toward the coupling shaft 324 in the middle region of the shaft 324 and the coupling shaft 322 is formed to be rotatably inserted into the inner space 302.

In addition, the fixed slip portion 330 has a coupling hole 332 to which the coupling shaft 324 is rotatably coupled at the center thereof, and a cam groove 336 corresponding to the cam protrusion 328 on the outer circumference of the coupling hole 332. And an arm cam part 334 having the flat part 337 continuously formed therein and being rotatably inserted into the inner space 302.

The coupling shaft 324 is inserted into the coupling hole 332 to prevent the rotation slip 320 and the fixed slip 330 is separated from each other when the cam projection 328 and the cam groove 336 is rotated. And only move back and forth.

In addition, a sliding protrusion 338 is formed on a side of the fixed slip portion 330, and the moving direction of the fixed slip portion 330 is slidably inserted into the inner space 302 of the housing 300. The sliding groove 308 is formed along the fixed slip portion 330 is rotatably fixed while allowing straight movement.

On the other hand, the spring 340, one end is coupled to the projection 306, the other end is inserted into the interior space 302 with the state holding the fixed slip portion 330. The lower end of the coupling shaft 324 passing through the coupling hole 332 is fitted into the center of the spring 340 to prevent the spring 340 from flowing.

The first support part 402 is formed with a fixing hole 404 to which the coupling shaft 322 is fixedly coupled, and the second support part 406 has a rotation hole 408 to which the rotation shaft 416 is rotatably coupled. Is formed.

Hereinafter, the operation of the conventional hinge device having the above configuration will be described.

The coupling hole 332 of the fixed slip 330 is rotatably coupled to the coupling shaft 324 of the rotary slip 320 in a state where the cover hinge device is assembled, and the cam protrusion of the rotary slip 320 is rotated. The cam groove 336 of the 328 and the fixed slip part 330 are brought into close contact with each other so as to be rotatable in a sliding motion, and the spring 340 touches the rear of the fixed slip part 330.

The coupling shaft 322 of the rotary slip part 320 passes through the through hole 304 of the housing 300 and is fixedly coupled to the fixing hole 404 of the first support part 402. In addition, the sliding protrusion 338 of the fixed slip portion 330 is inserted into the sliding groove 308 of the housing 300 to prevent rotation.

When the cover 410 is closed to the main body 400, the cam protrusion 328 of the rotary slip part 320 maintains a state of being coupled to the cam groove 336 of the fixed slip part 330.

Subsequently, when the cover 410 starts to open, the holder 412 fixed to the cover 410 and the housing 300 inserted into the insertion hole 414 of the holder 412 rotate together. In this case, the fixed slip part 330 inserted into the inner space of the housing 300 rotates together with the housing 300 and is fixedly inserted into the fixing groove 404 of the first support part 402 formed in the main body 400. The rotary slip portion 320 having the coupling shaft 322 does not rotate. Therefore, the fixed slip portion 330 and the rotary slip portion 320 are rotated while crossing each other, the sliding phenomenon occurs.

When the cover 410 is opened by about 90 ° from the main body 400, the cam protrusion 328 is separated from the cam groove 336 and is positioned at the flat portion 337 so that the rotational force does not act on the cover 410. 340 is in a compressed state. In this state, if the cover 410 is no longer rotated, the cover 410 may be stopped in a state in which the cover 410 is partially opened. That is, free stop is possible.

Subsequently, when the cover 410 is opened to the call angle, the cam protrusion 328 passes through the flat portion 337 and is coupled to the cam groove 336, and the spring 340 is extended to the restoring force and the fixed slip portion 330 is supported. do.

In this operation, the coupling hole 332 of the fixed slip part 330 is inserted into the coupling shaft 324 of the rotary slip part 320 to smoothly interact with the fixed slip part 330 and the rotary slip part 320. The center is firmly supported to make it happen. And the fixed slip portion 330 is a sliding protrusion 338 is inserted into the sliding groove 308 to prevent the rotational movement is only linear movement by the elasticity of the spring 340.

On the contrary, when the cover 410 is closed in the open state, the cam protrusion 328 moves away from the cam groove 336 to the flat portion 337, and the spring 340 is in the most compressed state. Subsequently, when the cover 410 is completely closed, the cam protrusion 328 is coupled to the cam groove 336 from the planar portion 337 again, the spring 340 is extended to the restoring force, and supports the fixed slip portion 330.

On the other hand, the cover 410 is opened about 90 degrees from the main body 400, the cam protrusion 328 is located in the flat portion 337, the spring 340 is most compressed in the section where the cover 410 is pre-stop Becomes Therefore, the frictional force generated between the cam protrusion 328 and the planar portion 337 is maximized.

In general, the fixed slip portion 330 and the rotary slip portion 320 are made of a plastic injection molding having a weaker hardness than metal for mass production.

Therefore, the conventional hinge device has a problem in that the cam projection 328 and the flat portion 337 of the hardness is worn in the free stop section in which the frictional force is maximum, thereby shortening the life of the hinge device.

The present invention has been made to solve the above problems, an object of the present invention is to combine the wear-resistant material with a high hardness to the contact surface of the two cam members, the cam member is worn out to shorten the life of the hinge device It is to prevent.

The present invention for achieving the above object, the housing; A rotating cam having a shape rotatably inserted into the housing, inserted into the housing, connected to an external member to rotate, and having a first recess and a first protrusion formed in a circular shape on one surface thereof; A first cover member formed of a material having a hardness higher than that of the rotary cam and covering the first recess and the first protrusion and coupled to the rotary cam; A fixed cam having a shape that is rotatably inserted into the housing and inserted into the housing, the fixed cam having a second protrusion corresponding to the first recess and a second recess corresponding to the first recess; A second cover member having a hardness higher than that of the fixed cam and having a shape covering the second protrusion and the second recess, coupled to the fixed cam and in contact with the first cover member; And it provides a hinge device for a communication terminal comprising an elastic member for closely contacting the rotary cam and the fixed cam.

The first recessed portions and the second protrusions each have a corresponding plane. In addition, the first protrusion and the second recess may be formed in a corresponding plane.

The first cover member and the second cover member are made of stainless steel plate.

The first cover member is formed with two or more first blades for generating an elastic force inward, and the first cam is formed on the rotary cam, each of the first recess is coupled.

The second cover member is provided with two or more second blades for generating an elastic force inwardly, and each of the second recesses to which the second blades are coupled is formed on the rotary cam.

A first guide shaft is formed at one side of the rotary cam and the fixed cam, and a first guide hole is formed at the other side so that the first guide shaft is rotatably coupled to the first cover member and the second cover member. A first through hole and a second through hole for passing the first guide shaft are respectively formed.

Hereinafter, a preferred embodiment according to the present invention will be described.

Figure 3 is an exploded perspective view of a hinge device of one embodiment of the present invention, Figure 4 is a perspective view of the hinged state of the hinge device shown in Figure 3, Figure 5 is a longitudinal section of the hinge device shown in FIG.

FIG. 7 is a longitudinal cross-sectional view of the hinge apparatus shown in FIG. 3 applied to a portable terminal, and FIG. 8 is a longitudinal cross-sectional view of the use state of FIG. 7.

A main board is built in the first body 100 of the communication terminal shown in this figure, and a keypad made of various buttons for controlling the main board is mounted on the surface of the first body 100. The second body 150 is hinged and opened and closed from the first body 100, and a liquid crystal display is mounted on a surface contacting the keypad.

The second body 150 of the communication terminal is hingedly coupled to the first body 100, the second body 150 in a state in which the second body 150 is closed and opened at a call angle The hinge device 200 for generating a predetermined braking force is inserted.

The hinge device 200, the housing 210; Consists of a shape that is rotatably inserted into the housing 210 is inserted into the housing 210, rotates in connection with the second body 150, the first recess 222 and the first protrusion 224 on one surface Rotating cam 220 formed in the shape; A first cover member 260 formed of a material having a higher hardness than the rotary cam 220 and covering the first recess 222 and the first protrusion 224 and coupled to the rotary cam 220; The second protrusion 242 and the second protrusion 224 corresponding to the first recess 222 and the first protrusion 224 are inserted into the housing 210 and have a shape that is rotatably inserted into the housing 210. A fixed cam 240 having a recessed portion 244 formed in a circular shape; A material having a higher hardness than the fixed cam 240, and having a shape covering the second protrusion 242 and the second recess 244, coupled to the fixed cam 240 and contacting the first cover member 260. Cover member 270; And an elastic member for closely contacting the rotary cam 220 and the fixed cam 240.

The first recessed portion 222 and the second protrusion 242 each have a corresponding plane.

The rotary cam 220 and the fixed cam 240 are made of a plastic injection molding at a low manufacturing cost, and the first cover member 260 and the second cover member 270 are manufactured by pressing a stainless steel plate as a material.

The first cover member 260 is formed with two or more first blades 262 for generating an elastic force inward, the first cam 226 is coupled to the rotary cam 220, each of the first blades 262 is Each is formed. In addition, at least two second blades 272 are formed on the second cover member 270 to generate an elastic force inward, and the second cam 246 to which the respective second blades 272 are coupled to the rotary cam 220. Are each formed.

The first guide shaft 228 is formed on one side of the rotary cam 220 and the fixed cam 240, the first guide hole 248 is rotatably coupled to the other side, A first through hole 264 and a second through hole 274 are formed in the first cover member 260 and the second cover member 270 to allow the first guide shaft 228 to pass therethrough.

The elastic member is composed of two compression springs 280 of different winding diameters. The compression spring 280 having a smaller diameter is positioned inside the compression spring 280 having a larger diameter. The elastic force is increased by using two compression springs 280.

The rotary cam 220 is formed in the connecting shaft 230 of the square, the first body 150 is formed in the square groove to which the connecting shaft 230 is coupled is coupled so as not to rotate with each other.

The first recessed portion 222 and the first protrusion 224 of the rotating cam 220 so that the braking force is generated in a state in which the second body 150 is closed in the first body 100 and rotated about 160 °, which is a call angle. And the period of the second protrusion 242 and the second recess 244 of the fixed cam 240 is set.

When the hinge device 200 is mounted on the communication terminal, the rotary cam 220 and the fixed cam 240 are in close contact with each other so as to slide together, and the compression spring 280 rotates the fixed cam 240. It is in close contact with the cam 220 side.

The guide shaft 228 of the rotary cam 220 passes through the centers of the first cover member 260, the second cover member 270, and the fixed cam 240 to cover the second cover member 270 and the fixed cam 240. ) Is the center of rotation.

And the housing 210 is fixed to the second body 150, the connecting shaft 230 is coupled to the square groove of the first body 100 is in a state that does not rotate by the first body (100).

Hereinafter, the operation of the present embodiment having the configuration as described above.

5 and 7 are longitudinal cross-sectional views of the hinge device when the second body of the portable terminal is closed, or when the second body is opened up to the call angle, Figures 6 and 8 are longitudinal cross-section of the process of opening or closing the second body. It is also.

In a state in which the second body 150 is closed to the first body 100, the first recessed portion 222 of the rotary cam 220 corresponds to the second protrusion 242 of the fixed cam 240, and the rotary cam ( The first protrusion 224 of 220 corresponds to the second recessed portion 244 of the fixed cam 240. At this time, the first cover member 260 coupled to the rotary cam 220 and the second cover member 270 coupled to the fixed cam 240 maintain contact with each other in a large area.

In this state, a predetermined braking force is generated by the elastic force of the compression spring 280.

And when lifting to open the second body 150, the housing 210 and the fixed cam 240 fixed to the second body 150 is rotated together. Since the rotation cam 220 is prevented from being rotated by the first body 100, a phenomenon in which the rotation cam 220 and the fixed cam 240 cross each other occurs.

When the second body 150 rotates about 80 ° from the first body 100, the second recess 244 of the rotary cam 220 is positioned at the second protrusion 242 of the fixed cam 240. . In this case, when the protruding portion is located at a plane portion of the second cover member 270, the second cover 150 becomes a freestop without receiving rotational force in any direction.

In this section, the compression spring 280 is most compressed, so that a strong friction force is generated between the first cover member 260 and the second cover member 270, but the first cover member 260 and the second cover made of stainless steel plate. Member 270 minimizes wear. Therefore, since the first cover member 260 and the second cover member 270 have less wear even after long-term use, the life of the hinge device 200 of the present embodiment is extended compared to the conventional hinge device.

When the second body 150 is opened to 160 ° of the call angle, the first recess 222 of the rotary cam 220 corresponds to the second protrusion 242 of the fixed cam 240, and the rotary cam 220. The first protrusion 224 of the corresponds to the second recessed portion 244 of the fixed cam 240. In this case, the first cover member 260 coupled to the rotary cam 220 and the second cover member 270 coupled to the fixed cam 240 maintain contact with each other in a large area.

In this state, a predetermined braking force is generated by the elastic force of the compression spring 280.

In this process, the guide shaft 228 is coupled to the center of the second cover member 270 and the fixed cam 240 to guide the rotary cam 220 and the fixed cam 240 to be aligned in a straight line.

On the contrary, when the second body 150 is closed in the open state, the hinge device 200 is operated in the reverse order to the second body 150 so that the second body 150 is closed to the first body 100.

When the second body 150 is closed to the first body 100, the compression spring 280 holds the fixed cam 240 toward the rotation cam 220 to prevent the second body 150 from rotating again.

As described above, the present invention has an effect of preventing the cam member from being worn and the life of the hinge device is shortened by combining the wear resistant material having high hardness to the contact surfaces of the two cam members.

In the above, the present invention has been described as an embodiment, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described claims, and has a general knowledge in the field of the present invention without departing from the gist of the present invention. Anyone who grows up will be able to make various variations.

Claims (7)

housing; A rotating cam having a shape rotatably inserted into the housing, inserted into the housing, connected to an external member to rotate, and having a first recess and a first protrusion formed in a circular shape on one surface thereof; A first cover member formed of a material having a hardness higher than that of the rotary cam and covering the first recess and the first protrusion and coupled to the rotary cam; A fixed cam having a shape that is rotatably inserted into the housing and inserted into the housing, the fixed cam having a second protrusion corresponding to the first recess and a second recess corresponding to the first recess; A second cover member having a hardness higher than that of the fixed cam and having a shape covering the second protrusion and the second recess, coupled to the fixed cam and in contact with the first cover member; And A hinge device for a communication terminal, characterized in that it comprises an elastic member for closely contacting the rotating cam and the fixed cam. The hinge device for a communication terminal according to claim 1, wherein the first recessed portion and the second protrusion portion each have a corresponding plane. The hinge device for a communication terminal of claim 1, wherein the first protrusion and the second recess are formed in a corresponding plane. The hinge device for a communication terminal of claim 1, wherein the first cover member and the second cover member are made of a stainless steel plate. The communication method of claim 1, wherein the first cover member is provided with two or more first wings for generating an elastic force inwardly, and the rotary cam has a first recessed portion to which each of the first wings is coupled. Hinges for terminals. The method of claim 1, wherein the second cover member is formed with two or more second wings for generating an elastic force inward, the rotary cam is characterized in that each of the second recess is coupled to each of the second blades is formed Hinges for terminals. The method of claim 1, wherein the guide cam is formed on one side of the rotary cam and the fixed cam, the first guide hole is rotatably coupled to the other side, the first cover member and the second cover member And a first through hole and a second through hole for passing through the guide shaft, respectively.

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