KR200387277Y1 - Swing device of mobile terminal equipment - Google Patents

Abstract

According to the present invention, when the display unit is rotated at a relatively small angle with respect to the main body unit, the display unit is automatically rotated to open to the main body unit, and the swing rotation torque of the display unit relative to the main body unit through elasticity of a ring spring or coil spring. By providing a, to enable the opening and closing of the display unit to the main body portion stably, and despite the frequent opening and closing of the display portion to the body portion relates to a swing device of the portable terminal to enable the opening and closing of the portable terminal reliably will be.

The swing device of the portable terminal according to the present invention is fixed to the main body portion, the hollow protrusion is formed in the center, the guide hole is formed on one side of the hollow protrusion, the lower casing is formed along the guide jaw, the edge along the guide hole A pressurizing member which is installed to be movable, and an upper casing, which is fixed to the display unit, on one side of which a hollow eccentric cam is rotatably fitted to the hollow protrusion of the lower casing and a fixing groove is formed on the outer circumferential surface, and the lower and upper casings. And a fastening member for engaging the clamping member, the hooking member of the lower casing is installed to surround the pressing member, and the display member automatically swings relative to the main body by providing an elastic force such that the pressing member always contacts the outer circumferential surface of the hollow eccentric cam. It characterized in that it comprises a ring-shaped spring to be.

Description

Swing device of portable terminal {SWING DEVICE OF MOBILE TERMINAL EQUIPMENT}

The present invention relates to a swing device of a portable terminal, and more particularly, is installed between the main body portion and the display portion of the portable terminal, when the display portion is rotated by a predetermined angle with respect to the main body portion, by automatically rotating the display unit It relates to a rotating device of a portable terminal to open to the part.

The present invention also provides a swing rotational torque of the display unit relative to the main body through the elasticity of the ring-shaped spring or coil spring, so that the opening and closing of the display unit relative to the main body can be made stable, and at the same time In spite of frequent opening and closing, the present invention relates to a swing device of a portable terminal, which enables the opening and closing of the portable terminal reliably.

For example, a portable terminal such as a mobile phone or a PDA is formed by combining a main body portion provided with a keypad and a display portion provided with liquid crystal so as to be openable and close, and according to the opening / closing structure of the display portion with respect to the main body portion, a slide type, It is classified as a swing type.

In general, the folding portable terminal has a structure in which the display unit is opened and closed while tilting and rotating within a predetermined angle range with respect to the hinge unit formed between the main body and the display unit. The display unit has a structure in which the display unit is opened and closed while sliding within a predetermined length range with respect to the main body unit by guide means formed respectively corresponding to the main body unit and the display unit. In the case of the swing swing, the display portion is automatically swinged by a predetermined swing device formed between the main body portion and the display portion, and the display portion is opened to the main body portion.

Recently, the trend of portable terminals has been developed for the reception of satellite or air DMB (Digital Multimedia Broadcasting). Most of these DMB portable terminals have a display unit for the main unit so that a wide screen can be provided. It is formed as a swing-type portable terminal that is opened while the road swing rotates.

In the case of a swing device applied to the conventional swing-type portable terminal, the lower casing is fixed to the main body, the hollow projection is formed in the center, the display unit is fixed to the hollow projection of the lower casing, rotatably coupled to, An upper casing having an eccentric cam having a fixed groove formed thereon, and a pressing member installed on one side of the lower casing, and installed between the lower casing and the pressing member to provide elastic force to the pressing member. Include.

However, the swing device of the swing-type portable terminal described above has a structure in which the display unit can be automatically rotated with respect to the main body unit only when the display unit is rotated at a relatively large angle corresponding to 30 degrees to 35 degrees with respect to the main body unit. Accordingly, when the swing-type portable terminal is open, a lot of force is very uncomfortable.

In addition, the spring is simply interposed between the lower casing and the pressing member, and since its fixed state is very unstable, it is impossible to properly provide the swing rotational torque of the display portion relative to the main body portion, and as a result, the display portion relative to the main body portion Not only the opening and closing could not be made stably, but if the display part was frequently opened and closed with respect to the main body, there was a problem that a failure could occur due to the deviation of the spring.

In addition, there is a problem that the manufacturing cost is increased by processing the eccentric cam in the upper casing, or by configuring the pressing member.

Accordingly, it is an object of the present invention to provide a swing device of a portable terminal that automatically rotates the display to open to the body when the display is rotated at a relatively small angle with respect to the body.

Another object of the present invention is to provide a swing rotational torque of the display unit with respect to the main body through the elasticity of the ring-shaped spring or the coil spring, so that the opening and closing of the display unit with respect to the main body can be made stable, Despite the frequent opening and closing of the display unit is to provide a swing device of the portable terminal to enable the opening and closing of the portable terminal reliably.

An object of the present invention described above is provided between a main body portion and a display portion of a portable terminal, the swing device of the portable terminal to swing open the display portion relative to the main body portion, fixed to the main body portion, the hollow in the center A protrusion is formed, and a guide hole is formed at one side of the hollow protrusion, and a lower casing having a locking jaw is formed at the edge thereof, a pressing member installed to be movable along the guide hole, and fixed to the display unit. The upper casing is rotatably fitted to the hollow protrusion of the casing and a hollow eccentric cam having a fixing groove is formed on the outer circumference, a fastening member for coupling the lower and upper casings, and a locking jaw of the lower casing to surround the pressure member. It is installed so that the pressing member is always in contact with the outer circumferential surface of the hollow eccentric cam, by providing an elastic force, the display unit It is achieved by providing a swing device of a portable terminal, characterized in that it comprises a ring-shaped spring to automatically swing swing relative to the body portion.

According to a preferred feature of the present invention, the cover is further interposed between the lower and upper casing, to prevent the separation of the pressing member and the ring spring.

According to a more preferred feature of the present invention, one side of the hollow protrusion is formed in the circular groove-shaped through groove, the one side of the above upper casing is formed along the through groove stopper projection defining a swing rotation range is formed .

According to a more preferred feature of the present invention, the swing rotation range defined by the above-described through groove and stopper protrusion is 90 degrees.

The above-described object of the present invention is also provided between a main body portion and a display portion of a portable terminal, the swing device of the portable terminal to swing open the display portion relative to the main body portion, is fixed to the main body portion, the center The hollow protrusions are formed, the guide grooves are formed around the hollow protrusions, an arc-shaped through groove is formed in the guide grooves, and a lower casing in which a seating groove is formed on one side of the guide grooves, and is fixed to the display unit. The upper casing is rotatably fitted into the hollow protrusion of the casing and is seated in the guide groove, and the upper casing has a stopper protrusion for determining a swing rotation range while moving along the through groove on one side thereof, and one end is coupled to the lower casing and the other end is the upper casing. It is coupled to the predetermined, while entering into the seating groove according to the direction of rotation of the upper casing relative to the lower casing Coil spring provides elastic force so that the upper casing automatically swings against the lower casing during the forced swing rotation of the angle, and the cover prevents the coil spring from falling off while defecting the lower casing while supporting the upper edge of the upper casing. It includes.

According to a preferred feature of the present invention, it further includes a friction reducing member interposed between the edge and the lid of the upper casing, to facilitate the rotation of the upper casing relative to the lower casing.

According to a more preferable feature of the present invention, the swing rotation range defined by the aforementioned through groove and stopper protrusion is 90 degrees.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to describe in detail enough to be able to easily carry out the invention by one of ordinary skill in the art, This does not mean that the technical spirit and scope of the present invention is limited.

1 is a perspective view of a swing device of the portable terminal 1 according to the first embodiment of the present invention, Figure 2 is an exploded perspective view of the swing device 1 of the portable terminal according to the first embodiment of the present invention Shown.

The portable terminal 1 according to the first embodiment of the present invention is installed between the main body 110 and the display 120 of the portable terminal 100, the display unit 120 with respect to the main body 110 1 and 2 to open by swinging, it is fixed to the main body 110, a hollow protrusion 11 is formed in the center, a guide hole (one side of the hollow protrusion 11) ( 13 is formed, the lower casing 10 is formed at the edge of the engaging projection 15, the pressing member 20 is installed to be movable along the guide hole 13 of the lower casing 10, and the display unit It is fixed to 120, the upper side of the hollow eccentric cam 31 is rotatably fitted to the hollow projection 11 of the lower casing 10 and provided with fixing grooves 33a and 33b on the outer circumferential surface thereof. Casing 30, the fastening member 40 for coupling the lower and upper casing (10, 30) integrally, and the locking step (1) of the lower casing (10) 5) is caught to be installed to surround the pressing member 20, by providing an elastic force so that the pressing member 20 is always in contact with the outer peripheral surface of the hollow eccentric cam 31, the display unit 120 during the forced swing rotation of a predetermined angle ) Includes a ring-type spring (50) to automatically swing swing relative to the body portion (110).

Here, the lower casing 10 is a portion that is integrally inserted and fixed in the groove 111 formed in the main body portion 110, the hollow projection 11 to which the hollow eccentric cam 31 of the upper casing 30 is fitted in the center. Is formed, a guide hole 13 for guiding the moving path of the pressing member 20 is formed on one side of the hollow protrusion 11, the locking jaw 15 is formed on the edge of the ring spring 50 is formed. .

The pressing member 20 is movably coupled to the guide hole 13 of the lower casing 10, which is the outer circumferential surface of the hollow eccentric cam 31 by the elastic force of the ring spring 50. By pressing the pressure, the display unit 120 swings automatically with respect to the main body 110 during the forced swing rotation of a predetermined angle, the lower surface of the guide projection 23 is inserted into the guide hole 13 It is formed and the upper surface includes a pressing body 21, the coupling protrusion 25 is formed, and a pressing wheel 27 rotatably coupled to the coupling protrusion 25 of the pressing body 21.

The upper casing 30 is rotatably coupled to the lower casing 10 described above, and the upper casing 30 is a portion that is integrally coupled to the display unit 120, and the lower casing 10 is disposed on one side thereof. Hollow eccentric cam 31 is rotatably fitted to the hollow projection 11 of the formed. Fixing grooves 33a and 33b are provided on the outer circumferential surface of the hollow eccentric cam 31, and the fixing grooves 33a and 33b are portions in which the pressing wheel 27 of the pressing member 20 is seated. It is recommended that the pressing wheel 27 be seated in a state in which the 120 is overlapped with the main body 110 and the display 120 is rotated by 90 degrees with respect to the main body 110.

In addition, an arc-shaped through groove 17 is formed at one side of the above-described hollow protrusion 11, and moves along the through groove 17 at one side of the upper casing 30 to define a swing rotation range. It is preferable that the stopper protrusion 35 is formed. In this case, the stopper protrusion 35 integrally formed in the upper casing 30 can be moved only in the through groove 17 formed in the lower casing 10, so that the upper casing 30 with respect to the lower casing 10 can be moved. The swing rotation range is limited, where the swing rotation range defined by the through groove 17 and the stopper protrusion 35 is preferably 90 degrees.

The lower and upper casings 10 and 30 described above are coupled by the fastening member 40, which is the hollow eccentric cam 31 of the upper casing 30 and the hollow protrusions of the lower casing 10. The lower and upper casings 10 and 30 are rotatably coupled through the 11.

The hooking jaw 15 of the lower casing 10 is caught by the ring-type spring 50 to surround the pressing member 20. The ring-type spring 50 is elastically inwardly as it is installed in an outwardly open state. By this elastic force, the pressing member 20 is always in contact with the outer circumferential surface of the hollow eccentric cam 31, and thus, the pressing wheel 27 against the display unit 120 to the main body portion is the hollow eccentric cam ( The force of the swing swing to reach a position exceeding the maximum radius point of 31), while the pressing member 20 continuously exerts a force on the outer circumferential surface of the hollow eccentric cam, the display unit 120 with respect to the body portion 110 Swing swing automatically.

The cover 60 is interposed between the lower and upper casings 10 and 30 described above, and the cover 60 not only prevents the detachment of the pressing member 20, but also the locking step 15 of the lower casing 10. ) And to form a seating groove of the ring-shaped spring 50 serves to prevent the departure. Therefore, the ring spring 50 can stably provide the swing rotation torque of the display unit 120 relative to the main body 110.

3A and 3B show the operation of the swing device 1 of the portable terminal according to the first embodiment of the present invention. 3A and 3B, the entire operation of the swing device 1 of the portable terminal according to the first embodiment of the present invention will be described in detail:

When receiving a DMB image or the like through the portable terminal 100 to view a wide screen, as shown in FIG. 3A, only the forced swing rotation of the display 120 at a predetermined angle with respect to the main body 110 is performed. When the display unit 120 automatically swings 90 degrees with respect to the main body 110 by the swing device 1 according to the first embodiment of the present invention.

In the state where the display unit 120 overlaps the main body unit 110, as shown in FIG. 3B, the pressing wheel 27 of the pressing member 20 is connected to the first fixing groove 33a of the hollow eccentric cam 31. At the same time, the stopper protrusion 35 integrally formed in the upper casing 30 is supported by one end of the through groove 17 formed in the lower casing 10, thereby maintaining the closed state of the portable terminal 100.

In this case, the display 120 is forced to swing only at an angle in which the pressure wheel 27 reaches a position beyond the maximum radius of the hollow eccentric cam 31 in the counterclockwise direction with respect to the main body 110. When the pressing member 20 continuously applies the force to the outer circumferential surface of the hollow eccentric cam 31, the display 120 automatically swings 90 degrees with respect to the main body 110, and at this time, the pressing member The pressing wheel 27 of the 20 is positioned in the second fixing groove 33b of the hollow eccentric cam 31, and the stopper protrusion 35 of the upper casing 30 is formed with a through groove (of the lower casing 10). It is supported by the other end of 17), the open state of the portable terminal 100 is maintained.

In particular, when the maximum radius of the hollow eccentric cam 31 is formed near the first fixing groove 33a of the hollow eccentric cam 31, the display unit 120 is forced to swing only at a relatively small angle with respect to the main body. Even if only the display unit 120 may automatically swing swing 90 degrees with respect to the main body 110.

On the contrary, when the display unit 120 is forced to swing at an angle reaching the position beyond the maximum radius of the hollow eccentric cam 31 in the clockwise direction with respect to the main body unit 110, The pressure wheel 27 of the member 20 is located in the first fixing groove 33a of the hollow eccentric cam 31, and the stopper protrusion 35 of the upper casing 30 is the through groove of the lower casing 10. Supported by the dlf terminal at (17), the closed state of the portable terminal 100 is maintained again.

4 shows a perspective view of a swing device 1 'of a portable terminal according to a second embodiment of the present invention, and FIG. 5 shows an exploded view of the swing device 1' of a portable terminal according to a second embodiment of the present invention. A perspective view is shown.

The portable terminal 1 'according to the second embodiment of the present invention is installed between the main body 110 and the display 120 of the portable terminal 100, the display 120 to the main body 110 As shown in FIGS. 4 and 5, it is fixed to the main body 120, and a hollow protrusion 11 ′ is formed at the center thereof, and a guide groove 13 ′ is formed around the hollow protrusion. And a lower casing 10 having an arc-shaped through groove 15 'formed in the guide groove 13', and a seating groove 17 'formed on one side of the guide groove 15', It is fixed to the display unit 120, is rotatably fitted into the hollow projection of the lower casing 10 is seated in the guide groove (13 '), one side is moved along the through groove (15') to determine the swing rotation range An upper casing 20 'having a stopper protrusion 23' formed thereon, one end of which is coupled to the lower casing 10 ', and the other end of which is the upper casing. The lower casing 10 'when the forced swing is rotated at a predetermined angle while being coupled to the sink 20' and entering and exiting into the seating groove 17 'according to the rotational direction of the upper casing 20' with respect to the lower casing 10 '. And the coil spring 30 'which provides an elastic force to automatically swing the upper casing 20' with respect to the upper casing 20 'and the lower casing 10' with the upper edge of the upper casing 20 'supported. At the same time includes a cover (40 ') to prevent the separation of the coil spring (30').

Here, the lower casing 10 'is a portion which is integrally inserted and fixed in the groove 111 formed in the main body 110, and a hollow protrusion (') through which the through hole 21 'of the upper casing 20' is fitted at the center thereof. 11 ') is formed, and around the hollow protrusion 11', a guide groove 13 'is formed on which the upper casing 20' is rotatably seated, and an upper casing 20 is formed in the guide groove 13 '. A circular through-groove 15 'to which the stopper protrusion 23' of ') is coupled is formed, and a seating groove 17' for installing the coil spring 30 'on one side of the guide groove 15'. Is formed.

The upper casing 20 ′ is rotatably coupled to the lower casing 10 ′, and the upper casing 20 ′ is integrally coupled to the display unit 120, and a lower casing 10 is disposed at the center thereof. A through hole 21 'fitted into the hollow protrusion 11' of the '' is formed, and on the outside thereof, a stopper protrusion is coupled to the through groove 15 'of the lower casing 10' to define a swing rotation method. 23 ') is formed.

The stopper protrusion 23 'integrally formed in the upper casing 20' can be moved only in the through groove 15 'formed in the lower casing 10', so that the upper casing 20 for the lower casing 10 'is moved. The swing rotation range of ') is defined, wherein the swing rotation range defined by the through groove 15' and the stopper protrusion 23 'is preferably 90 degrees.

Both ends of the coil springs 30 'are coupled to the lower and upper casings 10' and 20 ', respectively, and the coil springs 30' are connected to the lower casing 10 'during a forced swing rotation of a predetermined angle. The upper casing 20 ′ provides an elastic force to automatically swing rotation, and at the same time, the display 120 overlaps the main body 110 and the display 120 rotates 90 degrees with respect to the main body 110. Serves to maintain the open and closed state.

The above-described lower and upper casings 10 '20' are rotatably coupled by a cover 40 ', which covers the lower end of the upper casing 10' 20 'while supporting the upper edge of the upper casing 10' 20 '. Defects in the casing (10 ') serves to prevent the separation of the coil spring (30'), the support groove for supporting the upper edge of the upper casing (10 '20') around the through hole (41 ') ( 43 ') is formed.

A friction reducing member 50 'is interposed between the edge of the upper casing 30' and the cover 40 ', which is reduced when the upper casing 30 rotates. By reducing the frictional force generated between the edge of the ') and the lid 40', to facilitate the rotation of the upper casing relative to the lower casing, it is formed in a ring shape.

6A and 6B show an operation of the swing device 1 ′ of the portable terminal according to the second embodiment of the present invention, hereinafter with reference to FIGS. 6A and 6B according to the second embodiment of the present invention. The overall operation of the swing device 1 'of the portable terminal will be described in detail:

When receiving a DMB image or the like through the portable terminal 100 to view a wide screen, as shown in FIG. 6A, only the forced swing rotation of the display 120 at a predetermined angle with respect to the main body 110 is performed. The display unit 120 automatically swings 90 degrees with respect to the main body 110 by the swing device 1 ′ according to the second embodiment of the present invention.

In the state in which the display unit 120 overlaps the main body unit 110, as shown in FIG. 6B, the coil spring 30 ′ is positioned in the seating groove 17 ′ of the lower casing 10 ′. The coil spring 30 'has a stopper protrusion 23' of the upper casing 20 'as the other end coupled to the upper casing 20' is positioned on the left side with respect to one end coupled to the lower casing 10 '. The closed terminal of the portable terminal 100 is maintained by applying an elastic force counterclockwise with respect to the upper casing 20 'so as to be supported at one end of the through groove 15' of the lower casing 10 '.

In this case, when the display unit 120 is forcedly rotated at a predetermined angle in the counterclockwise direction with respect to the main body unit 110, the coil spring 30 ′ exits from the seating groove 17 ′ and the lower casing 10 ′. As the other end coupled to the upper casing 20 'is positioned on the right side with respect to the one end coupled to the), the display unit 120 automatically applies the elastic force in the clockwise direction with respect to the upper casing 20'. Swing swing about 90 degrees, and in this case, the stopper protrusion 23 'of the upper casing 20' is supported by the other end of the through groove 15 'of the lower casing 10' so that the portable terminal 100 It will maintain the open state.

On the contrary, if the display unit 120 is forcedly rotated by a predetermined angle clockwise with respect to the main body unit 110, the coil spring 30 ′ enters the seating groove 17 ′ to the lower casing 10 ′. As the other end coupled to the upper casing 20 'is positioned on the left side with respect to the combined end, the display unit 120 automatically applies the elastic force in the counterclockwise direction with respect to the upper casing 20'. In this case, the stopper protrusion 23 'of the upper casing 20' is supported on one end of the through groove 15 'of the lower casing 10' so that the portable terminal 100 is closed. Will be maintained.

Particularly, in the case of the swing device 1 'of the portable terminal according to the second embodiment of the present invention described above, the coil spring 30' is constituted only by the coil spring 30 'without the pressing member 20 and the eccentric cam 31. The operation of the swing device 1 of the portable terminal according to the embodiment can be realized as it is, it is possible to significantly reduce the manufacturing process and cost.

As described above, according to the swing device of the portable terminal according to the present invention, even if the display portion is rotated only by a relatively small angle with respect to the main body portion, as the display portion is formed to be automatically rotated relative to the main body portion, swing type It is very convenient because it requires less power when opening the portable terminal.

Through the elasticity of the ring-shaped spring or the coil spring that can maintain a stable installation state can provide a swing rotation torque of the display unit relative to the main body portion, to ensure the stable opening and closing of the display unit relative to the main body portion, Despite the frequent opening and closing of the display unit for the part there is an advantage that the opening and closing of the portable terminal can be made reliably.

In addition, when one end is fixed to the lower casing and the other end is fixed to the upper casing is applied, the configuration of the eccentric cam and the pressing member is not necessary, the assembly is much simpler and the effect that can significantly reduce the manufacturing cost have.

1 is a perspective view of a swing device of a portable terminal according to a first embodiment of the present invention.

Figure 2 is an exploded perspective view of a swing device of a portable terminal according to a first embodiment of the present invention.

3a and 3b is an operation of the swing device of a portable terminal according to a first embodiment of the present invention.

Figure 4 is a perspective view of a swing device of a portable terminal according to a second embodiment of the present invention.

Figure 5 is an exploded perspective view of a swing device of a portable terminal according to a second embodiment of the present invention.

6a and 6b is an operation of the swing device of a portable terminal according to a second embodiment of the present invention.

Explanation of symbols on main parts of drawing

1, 1 ': Swing device of portable terminal

10: lower casing 11: hollow protrusion

20: pressure member 27: pressure wheel

30: lower casing 31: hollow eccentric cam

40: fastening member 50: ring type spring

10 ': lower casing 20': upper casing

30 ': coil spring 40': cover

100: swing type portable terminal

110: main body 120: display

Claims (7)

In the swing device of the portable terminal is provided between the main body portion and the display portion of the portable terminal, so as to swing open the display portion relative to the main body portion: A lower casing fixed to the main body, a hollow protrusion formed at a center thereof, a guide hole formed at one side of the hollow protrusion, and a locking jaw formed at an edge thereof; A pressing member installed to be movable along the guide hole; An upper casing fixed to the display unit and having a hollow eccentric cam formed on one side thereof to be rotatably fitted to the hollow protrusion of the lower casing and having a fixing groove on an outer circumferential surface thereof; A fastening member for coupling the lower and upper casings; And It is hooked to the engaging jaw of the lower casing is installed so as to surround the pressing member, by providing an elastic force so that the pressing member is always in contact with the outer peripheral surface of the hollow eccentric cam, the display unit to automatically swing the rotation of the body portion Swing device of a portable terminal comprising a; spring. The method of claim 1, Is interposed between the lower and upper casing, the swing device of the portable terminal, characterized in that it further comprises a cover for preventing the separation of the pressing member and the ring-shaped spring. The method according to claim 1 or 2, A circular groove-shaped through groove is formed at one side of the hollow protrusion, and a stopper protrusion defining a swing rotation range is formed on one side of the upper casing while moving along the through groove. The method of claim 3, wherein Swing device of the mobile terminal, characterized in that the swing rotation range is limited to 90 degrees defined by the through groove and the stopper projection. In the swing device of the portable terminal is provided between the main body portion and the display portion of the portable terminal, so as to swing open the display portion relative to the main body portion: It is fixed to the main body, a hollow protrusion is formed in the center, a guide groove is formed around the hollow protrusion, an arc-shaped through groove is formed in the guide groove, a seating groove is formed on one side of the guide groove Lower casing; An upper casing fixed to the display unit and rotatably fitted into the hollow protrusion of the lower casing to be seated in the guide groove, and having a stopper protrusion formed on one side thereof to determine a swing rotation range while moving along the through groove; One end is coupled to the lower casing and the other end is coupled to the upper casing, and the upper casing is automatically turned on the lower casing during forced swing rotation of a predetermined angle, while entering and exiting into the seating groove according to the rotational direction of the upper casing with respect to the lower casing. Coil spring to provide elastic force to swing swing; And And a cover for preventing defects in the lower casing and preventing the coil spring from being detached while supporting the upper edge of the upper casing. The method of claim 5, And a friction reducing member interposed between the edge of the upper casing and the cover to facilitate rotation of the upper casing with respect to the lower casing. The method according to claim 5 or 6, Swing device of the mobile terminal, characterized in that the swing rotation range is limited to 90 degrees defined by the through groove and the stopper projection.