KR20050035817A - Cover opening and closed device of cellular phone - Google Patents

Abstract

The slide module for opening and closing the mobile phone cover by sliding movement is made of a structure using the elastic force of the spring to clearly recognize the opening and closing operation of the cover, and also to open and close the operation smoothly,

The present invention provides a main body on which a keypad is mounted, a cover which is slidably moved forward and backward to the main body, a cover on which a display window is mounted, an upper plate mounted on a lower side of the cover, and an upper plate mounted on an upper side of the main body so that the upper plate is slidable. A lower plate to be joined, a rotating plate rotatably mounted between the upper and lower plates, the upper and lower plates being slidably moved forward and backward with respect to the lower plate, and one end fixed to the rotating plate and the other end movable on the upper surface of the lower plate. It is supported and provided with elastic support means for elastically supporting the rotating plate during the sliding movement of the upper plate, and stopper means formed on the upper and lower plates to limit the sliding movement of the upper plate relative to the lower plate.

Description

Cover opening and closed device of cellular phone

The present invention relates to a cover opening and closing device of the mobile phone to be opened and closed by sliding the cover back and forth with respect to the main body.

More specifically, the sliding movement of the cover relative to the main body is made smoothly by the elastic force of the spring, and relates to a cover opening and closing device of the mobile phone so that the opening and closing operation of the cover is clearly distinguished.

In general, a mobile phone is composed of a main body and a cover, and is divided into a bar type, a flip type, and a folding type according to the opening and closing method of the cover for the main body.

The bar type mobile phone has been exposed to the outside of the keypad is easy to damage the keypad has been proposed to solve this problem, but the length of the main body has a long disadvantage that the user is not easy to carry.

In order to compensate for the disadvantages of the bar type and the flip type, a clamshell type mobile phone has been proposed, but the hinge part, which is a connection part between the cover and the main body, can be easily damaged due to the operation of opening and closing the folder when carrying the mobile phone.

In order to overcome the drawbacks of such a cellular phone, a slide type mobile phone has been proposed (shown in FIG. 1). The slide type mobile phone is divided into a main body 1 provided with a keypad 1a having a plurality of key input buttons on the upper side, and a cover 2 which is slidably coupled to the upper side of the main body 1.

An LCD liquid crystal display is mounted on the cover 2 and coupled to the upper and lower sides of the main body 1 by a slide module (not shown).

In the slide module of a conventional slide type mobile phone, since the member for guiding the slide is moved to the cover from the main body, the sliding module is formed in a rail structure, and thus, the sliding structure may be easily damaged due to the structural characteristics when an external impact is applied.

The slide type mobile phone was inconvenient in use because the user could not recognize the completion state of the opening and closing correctly when opening and closing due to the sliding movement.

Korean Patent Publication No. 2002-74870 discloses a "slide mobile phone using a slide module".

As shown in FIG. 2, the conventional slide module includes a sliding member (412,413) mounted to the slide module 312 to secure the main body to the slide module 312, and to allow the cover and the main body to slide. 410, a support plate 420 fixed to the main body to support the sliding member 410, and a sliding member 410 attached to the support plate 420 to fix the sliding member 410 and guide the sliding movement of the sliding member 410. And a guide plate 430 having a plane 431 in which the guide holes h1 are formed.

The slide member 410 vertically penetrates the leaf spring 411 attached to the support plate 420 by the guide plate 430 and the leaf spring 411 in order to fix the main body to the slide module 312. It consists of a fixed support 412,413, and the bulge 414 is a portion of the leaf spring 411 is raised so that the ball (415) is inserted between the leaf spring 411 and the support plate 420.

Two holes h4 and h5 are formed at the bottom of the support plate 420 so that the balls 411 are coupled to each other, and screw grooves for inserting the screws 401 and 402 are formed in the first and second fixing stands 412 and 413. .

In the conventional slide-type mobile phone, when the user slides the cover from the main body, the ball 415 is selectively locked to the holes (h4, h5) of the pedestal 420 to generate a "click" sound. You will recognize the action.

Therefore, it can be recognized that the sliding operation of the cover is completed, there is a noise generated when opening and closing, it is difficult to assemble due to the structural characteristics, there is a problem that the sliding operation of the cover is not made smoothly.

An object of the present invention is to smoothly open and close the cover by sliding the cover from the body by the elastic force using the spring, the user can accurately recognize the opened and closed state of the cover to increase the ease of use The present invention provides a cover opening and closing device for a mobile phone.

The above object of the present invention, the main body is equipped with a keypad,

The cover and the display window is coupled to the main body to be slidably moved forward and backward,

An upper plate mounted under the cover,

A lower plate mounted on an upper side of the main body and having an upper plate slidably coupled thereto;

A rotatable plate rotatably mounted between the upper and lower plates, the rotating plate sliding the upper plate forward and backward with respect to the lower plate;

One end is fixed to the rotating plate and the other end is supported on the lower plate so as to be flowable, and elastic support means for elastically supporting the rotating plate when sliding the upper plate;

It is achieved by providing a cover opening and closing device of the mobile phone, characterized in that formed on the upper and lower plates, the stopper means for limiting the sliding movement of the upper plate relative to the lower plate.

The above object of the present invention, the main body is equipped with a keypad,

The cover and the display window is coupled to the main body to be slidably moved forward and backward,

Rotating plate is rotatably mounted in the coupling groove formed in the upper surface of the main body, and sliding the cover in the forward and backward direction with respect to the main body,

One end is fixed to the rotating plate and the other end is supported on the bottom of the coupling groove so as to flow, the elastic support means for elastically supporting the rotating plate that is rotated during the sliding movement of the cover;

It is achieved by providing a cover opening and closing device of a mobile phone, characterized in that it is formed on the body and the cover, and has a stopper means for limiting sliding movement of the cover which is opened and closed with respect to the body.

According to a preferred embodiment, the aforementioned elastic support means,

A pair of interlocking bars, one end of which is coupled to the rotating plate and interlocked when the rotating plate rotates, a spring member that is mounted on the outer circumferential surface of the interlocking bar and contracts and expands when the interlocking bar flows, and is fixed to the other end of the interlocking bar, The support piece is formed in an arc shape, and the fixing portion is mounted to face the upper surface of the lower plate and the support surface is in contact with the outer surface of the support piece.

The stopper means described above,

A locking groove and a fixing groove formed on both sides of the upper plate and the rear plate, and a stopper protruding from the bottom surface of the lower plate and coupled with the locking groove and the fixing groove to limit the movement of the upper plate.

The groove is formed on the bottom surface of the upper plate at a right angle to the moving direction of the upper plate, and the locking mechanism for sliding the upper plate during sliding movement inside the groove is fixed to one end of the rotating plate.

Flange parts formed on the left and right sides of the upper plate described above, and a guide rail for supporting the upper plate is formed in the lower plate corresponding to the flange portion and sliding with respect to the lower plate.

It is formed on the upper surface of the above-described lower plate is provided with a guide jaw to smoothly rotate by rotating the rotating plate from the lower plate.

The above object of the present invention, the main body is equipped with a keypad,

The cover and the display window is coupled to the main body to be slidably moved forward and backward,

An upper plate mounted on the lower side of the cover and having a first gear formed on the bottom surface;

A lower plate mounted on an upper surface of the main body, and having an upper plate slidably coupled thereto and rotatably mounted with a second gear engaged with the first gear;

One end is fixed to the second gear and the other end is movably supported on the upper surface of the lower plate, and elastic support means for elastically supporting the second gear when sliding the upper plate;

It is achieved by providing a cover opening and closing device of the mobile phone, characterized in that formed on the upper and lower plates, the stopper means for limiting the sliding movement of the upper plate relative to the lower plate.

The above object of the present invention, the main body is equipped with a keypad,

The cover and the display window is coupled to the main body to be slidably moved forward and backward,

A first gear integrally formed on the inner surface of the cover,

A second gear rotatably mounted in a coupling groove formed on an upper surface of the main body and engaged with the first gear to slide the cover in a forward and backward direction with respect to the main body;

An elastic support means having one end fixed to the second gear and the other end movable on the bottom surface of the coupling groove, the elastic support means elastically supporting the second gear when the cover slides;

It is achieved by providing a cover opening and closing device of the mobile phone, characterized in that formed on the bottom surface of the cover and having a stopper means for limiting sliding movement of the cover with respect to the body.

According to a preferred embodiment, the aforementioned elastic support means,

A pair of interlocking bars, one end of which is coupled to the second gear and interlocked when the second gear rotates, a spring member that is mounted on the outer circumferential surface of the interlocking bar and contracts and expands when the interlocking bar flows, and is fixed to the other end of the interlocking bar. It includes a support piece is formed in an arc shape and the side surface is mounted opposite to the upper surface of the lower plate, the fixing portion formed with a support surface that is in surface contact with the outer surface of the support piece.

Locking means for fixing the upper plate relative to the above-described lower plate,

And a locking protrusion protruding outward from the flange portion of the upper plate and at least one locking groove formed inside the guide rail of the lower plate so as to correspond to the locking protrusion.

The first gear described above is formed as a rack gear and the second gear is formed as a pinion gear.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which is intended to explain to the extent that the present invention can be easily implemented by those skilled in the art. It does not mean that the technical spirit and scope of the present invention is limited.

3 to 6, the cover opening and closing apparatus of the mobile phone according to the first embodiment of the present invention, the main body (1) on which the keypad (1a) is mounted, the main body (1) and sliding movement in the front and rear direction The cover 2 includes a cover 2 on which the LCD display window is mounted, and a lower plate 30 mounted on the upper side of the main body 1.

The upper plate 20 which is slidably accommodated in the lower plate 30 and is mounted on the bottom surface of the cover 2 and formed at right angles to the moving direction of the upper plate 20 on the bottom surface of the upper plate 20. It has a recess 25 to be.

A locking hole 51 slidingly moved in the recess 25 is formed at one end, and a bottom plate 30 has a rotating plate 50 on which the other end is rotatably fixed.

The hollow 53 to which the fastening member 92 fixing the rotating plate 50 to the lower plate 30 is formed is formed at the center of the rotating plate 50, and the through hole 52 to which one end of the interlocking bar 60 is coupled. ) Is formed adjacent to the hollow 53.

One end is coupled to the rotating plate 50, the other end is supported on the lower plate 30 so as to be flowable and the pair of interlocking bar 60 and the interlocking bar 60, which is interlocked when the rotating plate 50 rotates It is equipped with a spring member 62 is contracted and expanded when the interlocking bar 60 flows.

It is formed on both sides of the outer circumferential surface of the interlocking bar 60 and provided with a fixing protrusion (60a) to prevent the spring member 62 is separated from the interlocking bar (60).

The support piece 65 is fixed to the other end of the interlocking bar 60 to prevent the spring member 62 from being separated, and is mounted to face the upper surface of the lower plate 30 and the support piece 65 having an outer surface formed in an arc shape. The first and second fixing pieces 72 and 74 are formed to face the support surface 70a which is in surface contact with the outer surface thereof.

As a stopper means for limiting the sliding movement of the upper plate 20 described above, the engaging groove 22 and the fixing groove 24 formed on both front and rear sides of the upper plate 20 and the lower portion so as to protrude from the bottom surface. It is coupled to the fastening hole 33 of the plate 30, the engaging groove 22 and the fixing groove 24 is provided with a stopper 80 for limiting the movement of the upper plate 20.

Flange 42 is formed on the left and right sides of the upper plate 20, the guide rail 44 formed on the lower plate 30 to correspond to the flange 42, and supports the upper plate 20 that is sliding It is provided.

The lower plate 30 protrudes from the bottom surface and has a guide jaw 32 for smoothly rotating the spaced apart rotation plate 50 from the lower plate 30.

The guide rail 44 of the lower plate 30 may be integrally injection molded, and may be integrally coupled by a bolt or the like.

Referring to the accompanying drawings, the operation of the cover opening and closing device of the mobile phone according to the first embodiment of the present invention is as follows.

When the user pushes the cover 2 toward the front of the main body 1, the flange portion 42 of the upper plate 20 mounted on the cover 2 moves forward by riding the guide rail 44 of the lower plate 30. Sliding movement.

The catching hole 51 accommodated in the recess 25 of the upper plate 20 is slidably moved in a direction perpendicular to the moving direction of the upper plate 20 inside the recess 25, and at the same time the rotating plate 50 is It is rotated clockwise along the guide jaw 32 with the fastening member 92 coupled to the bottom surface of the lower plate 30 as a central axis (see FIG. 6A).

As shown in FIG. 6B, when the upper plate 20 is slid to an intermediate position of the lower plate 30 due to the rotation of the rotating plate 50, the locking hole 51 of the rotating plate 50 is required. It is located on the other side of the groove 25 (in the drawing, the outside), wherein the spring member 62 mounted to the outside of the interlocking bar 60 is the most contracted time.

That is, the pair of interlocking bar 60 to be interlocked according to the rotation of the rotating plate 50 is to maintain the up and down direction in the drawing of Figure 6b, the spring member 62 is coupled to one side interlocking bar 60 is contracted The spring member 62 coupled to the other interlocking bar 60 has an extended reciprocal action.

Due to this, one side linkage bar 60 is contracted and the support piece 65 is fixed at the point of time out of the elastic force of the spring member 62 (meaning that it is moved to an intermediate position of the upper plate 20 (see Fig. 6b)). It rotates counterclockwise at the support surface 70a of 70 and flips it off, and the spring member 62 has a process of expanding again.

On the contrary, the other interlocking bar 60 has the spring member 62 expanded when the upper plate 20 slides, and then contracts when the upper plate 20 moves to an intermediate position, again out of the range at the maximum contraction position. When it has an opposite reaction that expands again.

When the sliding movement of the upper plate 20, the sliding movement with a little resistance is made by the elastic force of the spring member 62, the sliding movement is made smoothly by the elastic force and the inertia force again when out of the maximum contraction range, the cover (2) The user can recognize the opening and closing operation of

6A and 6C, when the sliding plate reaches a predetermined position when the upper plate 20 slides, the locking groove 22 or the fixing groove 24 is coupled to the stopper 80 so that the upper plate 20 It limits the sliding movement.

On the other hand, the operation of closing the cover 2 to the main body 1 is made in the reverse order of the above-described process of opening the cover 2, so a detailed description thereof will be omitted, the linkage bar 60 and the rotation plate 50 ) Will return to the initial position.

As shown in Fig. 7 to 10, the cover opening and closing apparatus of the mobile phone according to the second embodiment of the present invention, the main body 1 is mounted with the keypad (1a),

A cover 2 coupled to the main body 1 so as to be slidably moved forward and backward and mounted with a display window;

Rotating plate 50 is rotatably mounted in the coupling groove (1c) formed on the upper surface of the main body 1, and sliding the cover 2 in the front and rear direction with respect to the main body (1),

One end is fixed to the rotating plate 50 and the other end is supported on the bottom surface of the coupling groove 1c so as to be movable, and elastic support means for elastically supporting the rotating plate 50 which is rotated when sliding the cover 2;

And a stopper means formed on the main body 1 and the cover 2 to limit sliding movement of the cover 2 which is opened and closed with respect to the main body 2.

At this time, the above-described rotary plate 50, a pair of interlocking bars 60, the stopper 80, and the like are directly mounted in the coupling groove 1c formed on the upper surface of the main body 1, and the recess 25 and the locking groove Except for attaching the 22 and the fixing groove 24 directly to the inner side of the cover 2, the configuration is substantially the same as that described in the first embodiment of the present invention. The signs are the same.

As shown in FIGS. 9 and 10, when the cover 2 is pushed forward with respect to the main body 1 in the drawing, the rotation plate 50 formed in the engaging groove 1c of the main body 1 is a fastening member. It is rotated counterclockwise about the central axis (92).

As a result, since the locking hole 51 of the rotating plate 50 slides along the recess 25 formed in the inner surface of the cover 2, the cover 2 is slid forward with respect to the main body 1. .

As shown in Figures 11 to 15, the cover opening and closing apparatus of the mobile phone according to the third embodiment of the present invention, the main body (1) on which the keypad (1a) is mounted,

A cover 2 coupled to the main body 1 so as to be slidably moved forward and backward and mounted with a display window;

An upper plate 20 mounted on the lower surface of the cover 2 and having a first gear 27 (for example, a rack gear) formed on the bottom surface;

It is mounted on the upper side of the main body 1, the upper plate 20 is slidably coupled, the second gear 55 (for example, the pinion gear is used) that is engaged with the first gear 27 is rotatable. A lower plate 30 to be mounted

One end is fixed to the second gear 55 and the other end is supported on the lower plate 30 so as to be movable, and elastic support means for elastically supporting the second gear 55 when sliding the upper plate 20;

It is formed on the upper and lower plates (20, 30), and has a stopper means for limiting the sliding movement of the upper plate 20 with respect to the lower plate (30).

As shown in FIGS. 14 and 15, as the above-described cover 2 is slid forward with respect to the main body 1, the cover 2 is mounted on the bottom surface of the upper plate 20 mounted on the inner surface of the cover 2. The first gear 27 is moved forward in the drawing due to the rotation of the second gear 55 mounted on the upper surface of the lower plate 30 mounted on the upper body (1).

For this reason, the cover 2 is slidingly opened with respect to the main body 1, and is opened.

At this time, the first gear 27 formed on the inner surface of the upper plate 20 described above, and the second gear 55 rotatably installed to engage with the first gear 27 on the upper surface of the lower plate 30. Except the configuration is applied substantially the same as described in the first embodiment of the present invention, the detailed description is omitted, overlapping reference numerals are the same.

As shown in Figure 11, the cover opening and closing device of the mobile phone according to the present invention, while fixing the upper plate 20 and the lower plate 30 by the locking means, the locking means are both flanges of the upper plate 20 (42) The locking protrusion 42a is formed outside, and the locking groove 44a corresponding to the locking protrusion 42a is formed on the inner surface of the guide rail 44 of the lower plate 30.

When the upper plate 20 is pushed to the end, the locking groove 22 interferes with the stopper 80, and the locking protrusion 42a is locked to the locking groove 44a so that the cover 2 may be kept open. Thus, after the sliding movement of the upper plate 20 is completed, it is possible to prevent the upper plate 20 from descending to the lower side against the intention of the user.

When the user closes the cover 2, when the user applies a force greater than the locking engagement force to release the locking engagement of the locking protrusion 42a and the locking groove 44a and lowers the cover 2, the locking protrusion 42a is locked. It is separated from the groove 44a to enable the sliding return operation.

As shown in Figure 16 to 19, the cover opening and closing apparatus of the mobile phone according to the fourth embodiment of the present invention, the main body (1) on which the keypad (1a) is mounted,

A cover 2 coupled to the main body 1 so as to be slidably moved forward and backward and mounted with a display window;

A first gear 27 integrally formed on the inner surface of the cover 2,

A second gear 55 rotatably mounted in the coupling groove 1c formed on the upper surface of the main body 1 and engaged with the first gear 27 to slide the cover 2 in the front-rear direction with respect to the main body 1; )Wow,

One end is fixed to the second gear 55 and the other end is movably supported on the bottom surface of the coupling groove 1c, and elastic support means for elastically supporting the second gear 55 when sliding the cover 2;

It is formed on the bottom surface of the cover (2) and has a stopper means for limiting the sliding movement of the cover (2) relative to the body (1).

At this time, the second gear 55 and the pair of interlocking bars 60 and the fixing part 70 are directly mounted in the coupling groove 1c formed on the upper surface of the main body 1, and the first gear 27 is mounted. The configuration except that formed directly on the inner side of the cover 2 is substantially the same as that described in the third embodiment of the present invention, so detailed description thereof is omitted and overlapping reference numerals are the same.

As shown in FIGS. 18 and 19, when the cover 2 is pushed forward with respect to the main body 1, the second gear 55 formed in the engaging groove 1c of the main body 1 is fastened. The member 92 is rotated counterclockwise about the central axis.

As a result, since the first gear 27 formed on the inner surface of the cover 2 is moved forward to engage the second gear 55, the cover 2 is slid forward with respect to the main body 1. .

As described above, the cover opening and closing device of the mobile phone according to the present invention has the following advantages.

The slide module of the sliding type mobile phone has a structure using the elastic force of the spring, so that the user can recognize the opening and closing operation of the cover accurately, and the opening and closing operation of the cover can be smoothly reduced to greatly reduce the noise.

1 is an external perspective view showing a mobile phone of the general slide type.

Figure 2 is a perspective view of a slide module of a conventional slide type mobile phone.

Figure 3 is a schematic exploded perspective view of the cover opening and closing apparatus of the mobile phone according to the first embodiment of the present invention.

Figure 4 is an exploded perspective view of the cover opening and closing device shown in Figure 3;

5 is a perspective view of a state in which the upper plate is separated from the lower plate shown in FIG.

Figure 6a is a view of the upper plate shown in Figure 3 coupled to the lower plate.

FIG. 6B is a view showing that the upper plate shown in FIG. 3 slides forward of the lower plate.

FIG. 6C is a view in which the upper plate shown in FIG. 3 is slid with respect to the lower plate. FIG.

Figure 7 is an exploded perspective view of the cover opening and closing device of the mobile phone according to the second embodiment of the present invention.

8 is a view of a state in which the cover is coupled to the main body shown in FIG.

9 is a view showing that the cover shown in Figure 7 is moved to the front of the main body.

FIG. 10 is a view in a state in which the cover shown in FIG. 7 is slid with respect to the main body; FIG.

Figure 11 is an exploded perspective view of the cover opening and closing apparatus of the mobile phone according to the third embodiment of the present invention.

12 is a perspective view of a state in which the upper plate is separated from the lower plate shown in FIG.

FIG. 13 is a view of a state in which the upper plate and the lower plate shown in FIG. 11 are coupled to a cover and a main body; FIG.

14 is a view showing that the cover shown in FIG. 11 is moved forward with respect to the main body.

FIG. 15 is a view in a state in which the cover shown in FIG. 11 is slid with respect to the main body; FIG.

Figure 16 is an exploded perspective view of the cover opening and closing apparatus of the mobile phone according to the fourth embodiment of the present invention.

17 is a view of the cover shown in Figure 16 coupled to the body.

FIG. 18 is a view showing that the cover shown in FIG. 16 slides forward with respect to the main body.

FIG. 19 is a view of a state in which the cover illustrated in FIG. 16 is slid with respect to the main body.

* Explanation of symbols used in the main part of the drawing

One; main body

2; cover

20; Upper plate

30; Bottom plate

50; Rotating plate

60; Interlocking Bar

70; Fixture

80; stopper

Claims (20)

A main body equipped with a keypad; A cover coupled to the main body so as to be slidably moved forward and backward and on which a display window is mounted; An upper plate mounted below the cover; A lower plate mounted on an upper side of the main body and to which the upper plate is slidably coupled; A rotating plate rotatably mounted between the upper and lower plates and sliding the upper plate in a forward and backward direction with respect to the lower plate; An elastic support means, one end of which is fixed to the rotation plate and the other end of which is fluidly supported on an upper surface of the lower plate, and elastically supports the rotation plate when sliding the upper plate; And The cover opening and closing device of the mobile phone, characterized in that formed on the upper and lower plates, the stopper means for limiting the sliding movement of the upper plate with respect to the lower plate. A main body equipped with a keypad; A cover coupled to the main body so as to be slidably moved forward and backward and on which a display window is mounted; A rotating plate rotatably mounted in a coupling groove formed on an upper surface of the main body and sliding the cover in a forward and backward direction with respect to the main body; An elastic support means, one end of which is fixed to the rotating plate and the other end of which is fluidly supported on the bottom surface of the coupling groove, and elastically supporting the rotating plate that is rotated when the cover moves; And The cover opening and closing device of the mobile phone, characterized in that formed on the main body and the cover, the stopper means for limiting the sliding movement of the cover opening and closing with respect to the main body. According to claim 1, The elastic support means; A pair of interlocking bars, one end of which is coupled to the rotating plate and interlocked when the rotating plate rotates; A spring member mounted on an outer circumferential surface of the interlocking bar and contracted and expanded when the interlocking bar flows; A support piece fixed to the other end of the interlocking bar and having an outer surface in an arc shape; And The cover opening and closing device of the mobile phone, characterized in that it is mounted opposite to the upper surface of the lower plate, the fixing portion is formed with a support surface in surface contact with the outer surface of the support piece. According to claim 2, The elastic support means; A pair of interlocking bars, one end of which is coupled to the rotating plate and interlocked when the rotating plate rotates; A spring member mounted on an outer circumferential surface of the interlocking bar and contracted and expanded when the interlocking bar flows; A support piece fixed to the other end of the interlocking bar and having an outer surface in an arc shape; And The cover opening and closing device of the mobile phone, characterized in that it is mounted opposite to the bottom surface of the coupling groove of the main body, the fixing portion having a support surface which is in surface contact with the outer surface of the support piece. According to claim 1, The stopper means; Engaging grooves and fixing grooves formed at both front and rear sides of the upper plate; And The cover opening and closing device of the mobile phone, characterized in that the protrusion formed on the bottom surface of the lower plate, the engaging groove and the fixing groove is coupled to limit the movement of the upper plate. According to claim 1, Grooves are formed on the bottom surface of the upper plate at a right angle to the direction of movement of the upper plate, Cover opening and closing device of the mobile phone, characterized in that the locking mechanism for sliding the upper plate when the sliding movement in the groove portion is fixed to one end of the rotating plate. According to claim 2, Grooves are formed on the inner surface of the cover at a right angle to the direction of movement of the cover, Cover opening and closing device of the mobile phone, characterized in that the locking mechanism for sliding the cover when the sliding movement in the groove portion is fixed to one end of the rotating plate. The method of claim 2, wherein the stopper means; Engaging grooves and fixing grooves formed integrally with the front and rear left and right sides of the cover; And The cover opening and closing device of the mobile phone, characterized in that the protrusion is formed on the bottom of the coupling groove, the engaging groove and the fixing groove is coupled to limit the movement of the cover. According to claim 1, Flange portion formed on the left and right sides of the upper plate; And The cover opening and closing device of the mobile phone, characterized in that formed on the lower plate corresponding to the flange portion, and having a guide rail for supporting the upper plate which is slid with respect to the lower plate. The cover opening and closing device of claim 1, further comprising a guide jaw protruding from an upper surface of the lower plate and smoothly rotating the rotating plate from the lower plate. The cover opening and closing device of claim 2, further comprising a guide jaw protruding from a bottom surface of the coupling groove of the main body and spaced from the bottom surface of the coupling groove to smoothly rotate the guide plate. . A main body equipped with a keypad; A cover coupled to the main body so as to be slidably moved forward and backward and on which a display window is mounted; An upper plate mounted on a lower side of the cover and having a first gear formed on a bottom surface thereof; A lower plate mounted on an upper surface of the main body, the upper plate slidably coupled to the upper plate, and a lower plate rotatably mounted to a second gear engaged with the first gear; An elastic support means having one end fixed to the second gear and the other end movably supported on an upper surface of the lower plate and elastically supporting the second gear when the upper plate is slid; And The cover opening and closing device of the mobile phone, characterized in that formed on the upper and lower plates, the stopper means for limiting the sliding movement of the upper plate with respect to the lower plate. A main body equipped with a keypad; A cover coupled to the main body so as to be slidably moved forward and backward and on which a display window is mounted; A first gear integrally formed on the inner surface of the cover; A second gear rotatably mounted in a coupling groove formed on an upper surface of the main body and engaged with the first gear to slide the cover in a forward and backward direction with respect to the main body; An elastic support means, one end of which is fixed to the second gear and the other end of which is movable to the bottom surface of the coupling groove, and which elastically supports the second gear when sliding the cover; And The cover opening and closing device of the mobile phone, characterized in that the stopper means formed on the bottom surface of the cover to limit the sliding movement of the cover with respect to the main body. The method of claim 12, wherein the elastic support means; A pair of interlocking bars, one end of which is coupled to the second gear and interlocked when the second gear rotates; A spring member mounted on an outer circumferential surface of the interlocking bar and contracted and expanded when the interlocking bar flows; A support piece fixed to the other end of the interlocking bar and having an outer surface in an arc shape; And The cover opening and closing device of the mobile phone, characterized in that it is mounted opposite to the upper surface of the lower plate, the fixing portion is formed with a support surface in surface contact with the outer surface of the support piece. The method of claim 12, wherein the stopper means; Engaging grooves and fixing grooves formed in front, rear left and right sides of the upper plate; And The cover opening and closing device of the mobile phone, characterized in that the protrusion formed on the bottom surface of the lower plate, the engaging groove and the fixing groove is coupled to limit the sliding movement of the upper plate. The method of claim 13, wherein the stopper means; The cover opening and closing device of the mobile phone, characterized in that it is formed to protrude downward on the inner surface of the cover, the stopper to contact the side of the coupling groove when sliding the cover to limit the sliding movement of the cover. According to claim 12, Flange portion formed on the left and right sides of the upper plate; And The cover opening and closing device of the mobile phone, characterized in that formed on the lower plate corresponding to the flange portion, and having a guide rail for supporting the upper plate which is slid with respect to the lower plate. 18. The apparatus of claim 17, further comprising: locking means for securing the upper plate relative to the lower plate; A locking protrusion protruding outward from a flange portion of the upper plate; And Cover opening and closing device of the mobile phone, characterized in that it comprises at least one locking groove formed inside the guide rail of the lower plate to correspond to the locking projection. The cover opening and closing device of claim 12, wherein the first gear is formed of a rack gear, and the second gear is formed of a pinion gear. The method of claim 13, wherein the elastic support means; A pair of interlocking bars, one end of which is coupled to the second gear and interlocked when the second gear rotates; A spring member mounted on an outer circumferential surface of the interlocking bar and contracted and expanded when the interlocking bar flows; A support piece fixed to the other end of the interlocking bar and having an outer surface in an arc shape; And The cover opening and closing device of the mobile phone, characterized in that it is mounted opposite to the bottom surface of the coupling groove of the main body, the fixing portion having a support surface which is in surface contact with the outer surface of the support piece.