KR20050057868A - Opening and closing mechanism of cellular phone - Google Patents

Abstract

An opening and closing device of a portable terminal is disclosed in which a cover is opened and closed by swinging and rotating operations with respect to a main body and the front and rear surfaces are reversed. The fixing part of the opening / closing device disclosed is fixed to the first surface of the first body, and is axially supported on the rotating part so that the second body having the second surface is rotated in the second rotation direction perpendicular to the first rotation direction. The axial rotation member is coupled to the fixed part such that the rotation part is rotated in the first rotation direction parallel to the first surface. The first inertial force member exerts an elastic force in the open direction when the rotating part is close to the open position, and applies an elastic force in the close direction when the rotating part is close to the open position. The second inertial force member applies an elastic force in the open direction when the second body is close to the open position, and applies the elastic force in the closed direction when the second body is close to the closed position. Such an opening and closing device can be opened and closed in a swing operation by rotating the rotating part in the first rotation direction from the fixed part, and can be opened and closed in a rotational motion by rotating the second body in the second rotation direction from the rotating part, and the second body The second body can be reversed by closing in the swing operation in the state where is opened in the swing operation or closing in the swing operation in the state opened in the rotation operation.

Description

OPENING AND CLOSING MECHANISM OF CELLULAR PHONE}

The present invention relates to an opening and closing device of a portable terminal, and in particular, to enable the cover of the portable terminal to be opened and closed by a swing operation and a rotation operation with respect to the main body, and to the opening and closing device of the portable terminal capable of inverting the front and rear surfaces of the cover. It is about.

In general, the portable wireless terminal may be classified into a bar type, a flip type, a folder type, and the like according to its appearance.

The bar terminal has a problem in that a data input / output means and a handset module are mounted in a main body housing, and a keypad, which is a data input means, is always exposed and may cause malfunction. In addition, since both the transmitter and the receiver are formed in the main body housing, the distance between the ear and the mouth of the human body must be secured on the main body, thereby limiting the miniaturization.

In addition, the flip-type terminal is composed of a main body, a flip, and a hinge device for connecting the main body and the flip, wherein the main body is equipped with a data input / output means and a handset module, and the flip covers a keypad that is a data input means. However, the flip-type terminal, like the bar-type terminal, has a limitation in miniaturization due to the problem of securing the distance between the transmitter and the receiver.

The folder type terminal is composed of a main body, a folder, and a hinge device for rotatably connecting the main body and a folder to be opened and closed by rotating the folder. In the state in which the folder is in close contact with the main body, the keypad is prevented from malfunctioning in the call waiting mode. In the call mode, the folder can be opened to sufficiently secure the distance between the transmitter and the receiver, which is advantageous in miniaturization. For this reason, the foldable terminal is gradually becoming the mainstream of the portable wireless terminal.

On the other hand, the hinge device for rotatably coupling the flip or folder to the main body in the flip-type terminal or the clamshell terminal is provided with a force in the open direction even if the flip or folder is rotated more than a predetermined angle without any additional force, such a Below the angle is provided with a force in the direction in close contact with the body.

Such a conventional hinge device is disclosed in US Pat. No. 6,292,980 (September 25, 2001) and the like. The disclosed hinge device uses a hinge cam and a hinge shaft, each of which is formed with a valley and a valley, and a spring for bringing the hinge cam and the hinge shaft into close contact with each other in the hinge housing by using the curved surface of the hill and the valley and the elastic force of the spring. The principle is to open and close the door.

However, as the mobile communication service is gradually diversified, the function of the terminal is also rapidly diversified, while the conventional hinge device has only a function of simply opening and closing a flip or folder of the wireless terminal from the main body. For this reason, there are many restrictions in changing the specifications of the terminal, such as adding an additional device of the terminal to accommodate various mobile communication services. Moreover, the conventional hinge device not only has limitations on the specification and design change of the terminal, but also has a problem in that it does not meet the diversification of mobile communication services or the needs of consumers.

The present invention has been made to solve the above problems, an object of the present invention is to enable the cover of the portable terminal to be opened and closed by the swing operation and the rotation operation with respect to the main body, and to reverse the front and rear surfaces of the cover It is to make it possible.

The present invention for achieving the above object is fixed to the first surface of the first body; A rotating part axially supported such that a second body having a second surface in surface contact with the first surface is rotated in a second rotation direction perpendicular to the first rotation direction; An axial rotating member for coupling the rotating part to the fixed part such that the rotating part is rotated in a first rotational direction parallel to the first surface from the fixed part; An elastic force applied in a direction of opening to the rotating part when the rotating part is close to the open position, and an elastic force in a direction to close the rotating part when the rotating part is close to the closing position from the first reference phase point on the first path where the rotating part is rotated from the fixing part; 1 inertial force member; And an elastic force applied in a direction in which the second body is opened when the second body is close to the open position of the second body from the second reference phase point on the second path where the second body is rotated from the rotating part, and when the second body is close to the closed position. It provides an opening and closing device of a portable terminal, including; a second inertial force member for applying an elastic force in the closing direction to the two bodies.

The shaft rotating member may include: a central shaft installed in one of the fixing part and the rotating part in a direction orthogonal to the first rotation direction and passing through the other of the fixing part and the rotating part; And an anti-separation member coupled to an end portion of the central axis that is penetrated.

The first inertial force member may include: a first cam fixed to one of the fixing part and the rotating part, the first cam having a first waveform surface formed of a ridge and a valley formed along a first rotation direction; A second cam fixed to the other one of the fixing part and the rotating part and sequentially contacting the ridge and the valley part when the first cam is rotated; And a first elastic member for applying an elastic force so that the first cam and the second cam come into contact with the pressing force.

The first cam and the rotating portion are provided with a guide member which prevents the first cam from rotating and permits flow in a direction perpendicular to the first rotation direction.

The second inertial force member includes: a third cam having a square shaft coupled to a square hole formed in one of the rotating part and the second body, the second cam having a second waveform surface formed of a ridge and a valley formed along the second rotation direction; A housing that includes a third cam and is fixed to the other of the rotating part and the second body; A fourth cam contained in the housing so as to linearly move and having a third waveform surface corresponding to the second waveform surface of the third cam; And a second elastic member contained in the housing and applying an elastic force so that the third cam and the fourth cam come into contact with the pressing force.

In addition, the opening and closing device of the portable terminal of the present invention further includes a braking unit for stopping the rotating part in a state that is opened at a specific angle with respect to the fixing part.

The braking unit includes: a first catching protrusion formed on the rotating unit; And a stopper formed on the first locking protrusion and the stopper coupled to the fixing unit while the rotating unit is open.

In the opening and closing device of the present invention, the rotation part can be opened and closed in a swing operation by rotating in the first rotation direction from the fixed part, and the second body can be opened and closed in a rotation operation by rotating in the second rotation direction from the rotation part. The second body can be inverted by being closed in the rotational motion in the state where the second body is opened in the swing motion or in the swinging motion in the open state in the rotation motion.

Hereinafter, a preferred embodiment of the present invention having the configuration as described above will be described in detail the present invention. In the description of this embodiment, detailed descriptions of well-known functions and well-known structures will be omitted.

1 is an exploded perspective view showing an opening and closing device of a portable terminal according to an embodiment of the present invention, Figure 2 is another perspective view of the opening and closing device shown in Figure 1, Figure 3 is an enlarged perspective view of the fixing part shown in FIG. to be.

4 is a perspective view of the coupling state of the portable terminal shown in FIG. 1, FIG. 5 is a longitudinal cross-sectional view of the coupling state of the portable terminal illustrated in FIG. 4, and FIG. 6 is another angle longitudinal cross-sectional view of the portable terminal illustrated in FIG. 4. FIG. 7 is a cross-sectional view of the coupling state of the portable terminal shown in FIG. 4.

In the portable terminal of the present embodiment, the first body is represented by the main body 100, and the second body is represented by the cover 400 in a meaning encompassing a flip or a folder.

Opening and closing device shown in this figure, the fixing unit 110 is fixed to the upper surface of the main body 100 of the terminal; A rotating part 200 axially supported such that a cover 400 having a bottom surface in surface contact with an upper surface of the main body 100 is rotated in a second rotation direction R orthogonal to the first rotation direction S; An axis rotating member for coupling the rotating part 200 to the fixing part 110 such that the rotating part 200 is rotated in the first rotation direction S parallel to the upper surface from the fixing part 110; When the rotating part 200 is close to the position where the rotating part 200 is opened from the first reference phase point on the first path rotated from the fixing part 110, an elastic force is applied in the opening direction to the rotating part 200, and the rotating part 200 is provided. A first inertia force member that applies an elastic force in a direction close to the rotating part 200 when the position is close to the closing part; And an elastic force is applied to the cover 400 when the cover 400 is close to the open position of the cover 400 from the second reference phase point on the second path on which the cover 400 is rotated from the rotating part 200, and the cover 400. The second inertial force member for applying an elastic force in the direction close to the cover 400 is close to the closed position.

The fixing part 110 is coupled to the seating part 102 provided in the main body 100, and is fastened to the main body 100 by a screw 140.

Axial rotation member is provided in the direction orthogonal to the first rotation direction (S) in the fixing portion 110, the central shaft 120 penetrating through the rotating part 200; And an anti-separation member coupled to an end of the central shaft 120 that is penetrated.

The anti-separation member includes: an ear ring 230 coupled to the annular groove 122 formed on the outer circumferential surface of the end region of the protruding central axis 120; And a washer 232 inserted into the central shaft 120 between the rotating part 200 through which the central shaft 120 passes and the ring 230.

The first inertial force member may include: a first cam 170 fixed to the rotating part 200 and having a first waveform surface 171 formed of a ridge and a valley formed along the first rotation direction S; A second cam 130 fixed to the fixing unit 110 and sequentially contacting the mountain and the valley when the first cam 170 rotates; And a spring 180 that applies an elastic force so that the first cam 170 and the second cam 130 come into contact with the pressing force.

The first cam 170 and the rotating part 200 are provided with a guide member which prevents the first cam 170 from rotating and allows the first cam 170 to flow in a direction perpendicular to the first rotation direction S. FIG.

The rotating part 200 is provided with a receiving space 212 for guiding the first cam 170 to flow in a direction orthogonal to the first rotation direction S, and the first cam 170 in the receiving space 212. Slide groove 220 is formed along the flow direction of the). The guide member is formed on an outer circumferential surface of the first cam 170 and is at least one slide protrusion 174 slidably coupled to the slide groove 220.

Meanwhile, since the central shaft 120 protrudes through the rotating part 200, the rotating part 200 is divided into a first cylindrical part 210 and a second cylindrical part 240 so as to avoid this.

The first cylindrical portion 210 is formed with a first through hole 216 through which the central axis 120 protrudes, and a screw holder 218 is formed on an outer circumferential surface thereof. The second cylindrical portion 240 is formed with a first coupling hole 244 to which the first cylindrical portion 210 is coupled, and a second through hole 242 for passing the screw 140 through the screw holder 218. ) Is formed.

When the screw 140 passes through the second through hole 242 and is fastened to the screw holder 218, the first cylindrical portion 210 and the second cylindrical portion 240 are coupled to each other, and the rotation of the rotating part 200 is performed. Only the head of the screw 140 is exposed from the outside.

Rotating protrusion 246 is formed on the cover 400, the rotating hole 402 is coupled to the rotating protrusion 246 to the second cylindrical portion 240 of the rotating part 200 is rotated in the second rotation direction (R) Is formed.

The second inertial force member has a square shaft 262 coupled to the square hole 262 formed in the second cylindrical portion 240 of the rotating part 200, and the mountain portion formed along the second rotation direction R and A third cam 260 having a second waveform surface 261 formed of a bone portion; A housing 280 containing a third cam 260 and fixed to the cover 400; A fourth cam 270 contained in the housing 280 so as to be linearly movable, and having a third waveform surface 271 corresponding to the second waveform surface 261 of the third cam 260; And a spring 180 contained in the housing 280 and applying an elastic force so that the third cam 260 and the fourth cam 270 come into contact with the pressing force.

A guide shaft 264 protruding in a direction orthogonal to the second rotation direction R is formed at the center of the third cam 260, and a guide shaft 264 is rotatable at the center of the fourth cam 270. Guide holes 272 to be coupled are formed.

The housing 280 has a non-circular outer circumferential surface, and when the housing 280 is coupled to the cover 400, a second coupling hole 404 is formed. Rotation of the housing 280 to the second coupling hole 404 is prevented. In addition, the outer portion of the second coupling hole 404 is plugged with a stopper 274 so that the housing 280 is not exposed to the outside.

Guide protrusions 274 are formed on the outer circumferential surface of the fourth cam 270, and guide grooves 274 are formed in the housing 280 to guide the flow of the guide protrusions 274 in a direction orthogonal to the second rotation direction R. 282 is formed.

The opening and closing device of the portable terminal according to the present embodiment further includes a braking part for stopping the rotating part 200 in a state of being opened at a specific angle with respect to the fixing part 110.

The braking unit includes: a first catching protrusion 214 formed on the rotating unit 200; And a stopper 150 coupled to the fixing part 110, and a second catching protrusion 152 that is caught by the first catching protrusion 214 in the open state of the rotating part 200.

The stopper 150 is formed in a ring shape, and the rotating part 200 allows the second catching protrusion 152 to flow by the width of the sum of the thicknesses of the first catching protrusion 214 and the second catching protrusion 152. A long hole 112 to be coupled is formed, and a cover 400 coupled to the fixing unit 110 from below the stopper 150 is provided.

The rotating part 200 can rotate in both directions, and the stopper 150 is installed in the position which makes the rotating part 200 stop in the open state by rotating 180 degrees each in both directions.

In this way, a restriction on the rotation angle of the first rotation direction S of the rotation unit 200 and the cover 400 is set.

And the cover 160 for preventing the departure of the stopper 150 is coupled to the fixing portion (110). A hook hole 162 is formed in the cover 160, and a hook 114 to which the hook hole 162 is caught is formed in the fixing part 110. Therefore, when the engaging hole 162 of the cover 160 is fastened to the hook 114, the separation of the stopper 150 is prevented.

On the other hand, in a state in which the cover 400 is opened in the second rotation direction R, a part of the cover 400 comes into contact with the main body 100 and stops.

Hereinafter, the operation of the opening and closing device of the portable terminal having the above configuration will be described.

In the state in which the opening and closing device of the present embodiment is mounted on the portable terminal, the central shaft 120 fixed to the fixing unit 110 coupled to the main body 100 is rotatable to the rotating unit 200 fixed to the cover 400. By being coupled, the cover 400 is rotatable in a swing operation from the main body 100.

In addition, the first cam 170 receives the elasticity of the spring 180 to maintain the valley portion of the first waveform surface 171 in contact with the second cam 130, and the fourth cam 270 is the spring 180. ), The third waveform surface 271 maintains contact with the second waveform surface 261 of the third cam 260. Therefore, the state in which the cover 400 is closed to the main body 100 is maintained.

8 and 9 are cross-sectional views of a state in which the cover is opened by swing in FIG. 7, and FIG. 10 is a longitudinal cross-sectional view of the state in which the cover is opened by swing in FIG. 6.

First, when the cover 400 is rotated to one side of the first rotation direction S shown in FIG. 4 in order to open the cover 400 in a swinging motion, the rotating part 200 together with the cover 400 is rotated by a central axis ( It rotates in the first rotation direction (S) around 120.

At this time, the second cam 130 formed on the fixing part 110 is moved away from the valley of the first waveform surface 171 of the first cam 170 and moves to the mountain part. In this process, since the first cam 170 receives the elasticity of the spring 180, the first cam 170 first generates a force to prevent the cover 400 from being opened. However, when the second cam 130 passes the mountain portion, the first cam 170 generates a pushing force to open more quickly in the opening direction of the cover 400 by the elasticity of the spring 180.

Therefore, the operation is automatically performed from the partially open state to the fully open state of the cover 400.

When the opening angle of the cover 400 is opened close to 180 °, the first locking protrusion 214 formed on the rotating part 200 is caught by the second locking protrusion 152 of the stopper 150. The second locking protrusion 152 stops in the state in which the cover 400 is pushed to an end portion of the long hole 112 of the rotating part 200 in the opening direction. Therefore, the rotation part 200 and the cover 400 can no longer rotate.

As such, the opening operation of the cover 400 is completed, and the second cam 130 is coupled to the valley portion of the first cam 170 to generate a predetermined stopping force, thereby opening the rotating part 200 and the cover 400. To stop in a state.

On the contrary, when the cover 400 is rotated in the direction of closing the cover 400 in the open state, the first cam 170 and the second cam 130 are operated in the opposite operation to the above.

In addition, the opening and closing actions of the first rotation direction S of the cover 400 are the same when the cover 400 is first rotated in a swing motion in the opposite direction.

On the other hand, the process of opening the cover 400 in the rotation operation in a state in which the cover 400 is closed to the main body 100 will be described.

FIG. 11 is a perspective view of a state in which the cover is opened by the rotational operation in FIG. 4, and FIG. 12 is a longitudinal cross-sectional view of the state in which the cover is opened by the rotational operation in FIG. 5.

When the cover 400 is opened by rotating the cover 400 in the second rotation direction R while the cover 400 is closed in the main body 100, the second waveform surface 261 and the first cam of the third cam 260 are opened. Slip occurs on the first waveform surface 171 of 170.

The hill portion of the third cam 260 moves away from the valley portion of the fourth cam 270 to the hill portion. In this process, since the third cam 260 receives the elasticity of the spring 180, firstly, the third cam 260 generates a force to prevent the cover 400 from being opened. However, when the ridge of the third cam 260 passes through the ridge of the fourth cam 270, the third cam 260 generates a pushing force to open the cover 400 more quickly due to the elasticity of the spring 180. .

Therefore, the operation is automatically performed from the partially open state to the fully open state of the cover 400.

When the cover 400 is completely opened, the hill portion of the third cam 260 is coupled to the valley portion of the fourth cam 270 to generate a predetermined stopping force so that the cover 400 is stopped in the open state.

On the contrary, when the cover 400 is rotated in the second rotation direction R which closes the cover 400 in the open state, the third cam 260 and the fourth cam 270 operate in the opposite operation. .

On the other hand, the operation of inverting the front and rear of the cover 400 will be described.

FIG. 13 is a perspective view of a state in which the cover is opened in a swing operation in FIG. 5, and FIG. 14 is a perspective view of a state in which the cover of the portable terminal of the present embodiment is inverted and closed.

When the cover 400 is rotated in the second rotation direction R while the cover 400 is rotated in the first rotation direction S and opened, the large liquid crystal display 410 of the cover 400 is initially closed. On the contrary, the cover 400 is positioned on the top surface.

In addition, as shown in FIG. 11, when the cover 400 is rotated in the second rotation direction R to open and the cover 400 is rotated in the first rotation direction S to close, the large LCD screen of the cover 400 ( 410 is located on the upper surface of the cover 400 as opposed to the first.

Therefore, the user can see the large LCD screen 410 even when the cover 400 is closed.

As described above, the present invention enables the rotating part to be opened and closed in a swinging motion by rotating in the first rotational direction from the fixed part, and the second body can be opened and closed in a rotational motion by rotating in the second rotational direction from the rotating part. It is possible to close the second body by closing in the rotational motion in the state in which the second body is opened in the swing motion or in the swing motion in the state in which the second body is open in the rotation motion. Therefore, the opening and closing device of the present invention has the effect of satisfying the user's preference by having a function of various opening and closing operations.

The present invention has been described above by way of specific embodiments, but the present invention is not limited to the above-described embodiments, and those skilled in the art without departing from the gist of the present invention claimed in the claims. Anyone can make a variety of variations.

1 is an exploded perspective view showing an opening and closing device of a portable terminal according to the preferred embodiment of the present invention;

Figure 2 is another perspective view of the opening and closing device shown in Figure 1,

3 is an enlarged perspective view of the fixing part shown in FIG. 1;

Figure 4 is a perspective view of the coupled state of the portable terminal shown in FIG.

5 is a longitudinal cross-sectional view of the coupled state of the portable terminal shown in FIG. 4;

6 is another angular longitudinal cross-sectional view of the portable terminal shown in FIG. 4;

7 is a cross-sectional view of the coupled state of the portable terminal shown in FIG. 4;

8 and 9 are cross-sectional views in a state in which the cover is opened in a swing operation in FIG. 7,

FIG. 10 is a longitudinal cross-sectional view of a state in which the cover is opened by swinging in FIG. 6;

FIG. 11 is a perspective view of the cover opened in FIG.

12 is a longitudinal cross-sectional view of a state in which the cover is opened by the rotation operation in FIG.

FIG. 13 is a perspective view of the cover opened in FIG.

14 is a perspective view of a state in which the cover of the portable terminal of the present embodiment is inverted and closed.

<Explanation of symbols for main parts of drawing>

100: main body 102: seating portion

110: fixed part 112: long hole

120: central axis 122: annular groove

130: second cam 140: screw

150: stopper 152: second jamming projection

160: cover 162: locking hole

170: first cam

171: first wavefront 172: center hole

174: Slide projection 180: Spring

200: rotating portion 210: first cylindrical portion

212: accommodating space 214: first locking projection

216: first through hole 218: screw holder

220: slide groove 230: E-ring

232: washer 240: second cylindrical portion

242: second through hole 244: first coupling hole

246: rotating protrusion 248: square ball

260: third cam 261: second waveform surface

262: square shaft 264: guide shaft

270: fourth cam 271: third wavefront

272: guide ball 274: guide projection

280: housing 282: guide groove

290: stopper 400: cover

402: rotation hole 404: second coupling hole

410: LCD screen

Claims (14)

A fixing part fixed to the first surface of the first body; A rotating part axially supported such that a second body having a second surface in surface contact with the first surface is rotated in a second rotation direction perpendicular to the first rotation direction; An axial rotation member for coupling the rotation part to the fixing part such that the rotation part is rotated in the first rotation direction parallel to the first surface from the fixing part; When the rotating part is close to the open position of the rotating part from the first reference phase point on the first path rotated from the fixing part, an elastic force is applied in the opening direction of the rotating part, and closes to the rotating part when the rotating part is close to the closed position. A first inertial force member applying an elastic force in a direction; And Position where the second body is close to the open position of the second body when the second body is close to the open position of the second body from the second reference phase point on the second path rotated from the rotating part, the position where the second body is closed And a second inertial force member applying an elastic force in a direction in which the second body is closed to the second body. The method according to claim 1, wherein the shaft rotating member, A central axis installed in one of the fixing part and the rotating part in a direction orthogonal to the first rotation direction and passing through the other of the fixing part and the rotating part; And Opening and closing device of a portable terminal, characterized in that comprises; a separation preventing member coupled to the end of the central shaft through. The method of claim 2, wherein the separation preventing member, E-ring coupled to the annular groove formed on the outer peripheral surface of the end region of the protruding central axis; And And a washer fitted to the central shaft between the fixing member and the rotating member and the member through which the central shaft penetrates, and the ear ring. The method according to claim 1, wherein the first inertial force member, A first cam fixed to one of the fixing part and the rotating part, the first cam having a first waveform surface formed of a ridge and a valley formed along the first rotation direction; A second cam fixed to the other one of the fixing part and the rotating part and sequentially contacting the ridge part and the valley part when the first cam is rotated; And And a first elastic member configured to apply an elastic force such that the first cam and the second cam are brought into contact with the pressing force. The portable terminal of claim 1, wherein the first cam and the rotating part are provided with a guide member which prevents the first cam from rotating and allows the first cam to flow in a direction perpendicular to the first rotation direction. Switchgear. The method of claim 1, wherein the rotating portion is formed with a receiving space for guiding the first cam flows in a direction orthogonal to the first rotation direction, the receiving space is a slide groove along the flow direction of the first cam Formed, The guide member is formed on the outer circumferential surface of the first cam, the opening and closing device of the portable terminal, characterized in that at least one slide projection slidably coupled to the slide groove. The method of claim 1, wherein one of the rotating unit and the second body is formed with a rotating projection, The other one of the rotating unit and the second body opening and closing device of the portable terminal, characterized in that the rotating hole is coupled to the rotating projection is rotated in the second direction of rotation. The method according to claim 1, wherein the second inertial force member, A third cam having a square shaft coupled to the square hole formed in one of the rotating part and the second body, the third cam having a second waveform surface formed of a ridge and a valley formed along the second rotation direction; A housing containing the third cam and fixed to the other one of the rotating part and the second body; A fourth cam contained in the housing so as to linearly move, and having a third waveform surface corresponding to the second waveform surface of the third cam; And And a second elastic member contained in the housing and exerting an elastic force such that the third cam and the fourth cam come into contact with the pressing force. The guide shaft of claim 8, wherein a guide shaft protruding in a direction orthogonal to the second rotation direction is formed at the center of one of the third cam and the fourth cam, The center of the other one of the third cam and the fourth cam opening and closing device of the portable terminal, characterized in that the guide hole is rotatably coupled to the guide shaft. The apparatus of claim 8, wherein the housing has a non-circular outer circumferential surface, and one of the rotating parts and the second body has a first coupling hole to which the housing is coupled. The method of claim 10, wherein the guide protrusion is formed on the outer peripheral surface of the fourth cam, The housing of the portable terminal, characterized in that the guide groove for guiding the guide projections flow in the direction orthogonal to the second rotation direction is formed. The method of claim 1, wherein the opening and closing device of the portable terminal, the opening and closing device of the portable terminal further comprises a braking part for stopping in a state in which the rotating part is opened at a specific angle with respect to the fixing part. The method of claim 12, wherein the braking unit, A first catching protrusion formed on the rotating unit; And And a stopper coupled to the fixing part, wherein a second locking protrusion is formed on the first locking protrusion in the open state of the rotating unit and coupled to the fixing unit. The said stopper is formed in ring shape, The rotating part is formed with a long hole is coupled so that the second locking projections can flow by the width of the first locking projections and the second locking projections, Opening and closing device of a portable terminal, characterized in that the cover is coupled to the fixed portion from below the stopper.