KR20040064334A - Hinge device for Cellular-phone - Google Patents

Abstract

PURPOSE: A hinge device for a mobile phone is provided to automatically open a folder by a restoring force of a spring by pressing a button member. CONSTITUTION: A cylindrical housing(10) includes the first cam shaping part at an inner circumferential surface. A rear cover(30) is formed at a lower end of the housing(10) and has the second cam shaping part(35). A front cover(40) is mounted at an upper end of the housing(10) and includes the third cam shaping unit(46). A shift(50) is installed in the housing(10) by penetrating the front cover(40) and has a pair of upper operation protrusions(52,52') and a pair of lower operation protrusions(53,53'). A spring(60) is disposed between the shaft(50) and the rear cover(30). A button member(70) is mounted at an upper end of the shaft(50).

Description

Hinge device for Cellular-phone

The present invention relates to a hinge device for a mobile phone which opens a folder automatically when the button is pressed and manually closes the folder. More specifically, when the button member is pressed while the folder is closed, the operation protrusion of the shaft is cam-shaped by the restoring force of the spring. Moving along the slope of the negative, the shaft connected to the main body of the mobile phone and the housing mounted on the folder of the mobile phone relative to each other, the folder is automatically connected to the hinge device for the mobile phone is opened.

In the conventional case, since the mobile phone folder must be opened and closed manually, when using a mobile phone, the user had to hold the mobile phone body with one hand and open the folder with the other hand. Therefore, the folder could not be easily opened when only one hand had to be used, such as having another object in one hand.

In order to overcome such a problem, a cell phone which automatically opens a folder when a button is pressed is introduced in Patent No. 326771 (registered Feb. 19, 2002) as a "cover opening / closing device for a cell phone". However, the mobile phone cover opening and closing device has a disadvantage in that the structure is complicated and the battery consumption is high because the folder is automatically opened and closed by a motor and a gear.

Korean Unexamined Patent Publication No. 2002-37281 (published May 18, 2002) introduces a "hinge unit of a mounting strand".

The hinge unit of the mounting strap presses a button on the watch type PHS communication terminal, and as the fixing pin moves along the side slide hole of the rotating pipe by the restoring force of the spring, the strap is automatically opened and thus the watch type PHS communication The terminal can be easily removed from the wrist. However, the hinge unit of the mounting strap is a structure for releasing the strap worn on the wrist, and has a problem that it is difficult to apply as a hinge device for a mobile phone due to its large size and complicated structure.

Republic of Korea Utility Model Registration No. 258170 (Registration of Dec. 7, 2001) introduces "Cover hinge device of mobile communication terminal". The cover hinge device of the mobile communication terminal is automatically opened by the restoring force of the spring after the user directly opens the folder up to 30 degrees while the folder is folded. However, the cover hinge device of such a mobile communication terminal does not completely solve the problem of opening a folder with both hands.

Republic of Korea Utility Model Registration No. 214694 (Registered Dec. 13, 2000) introduces the "automatic opening and closing device for mobile phones".

In the automatic opening and closing device for a mobile phone, when a button is pressed, the folder is automatically opened by the relative movement of the slide cam and the rotary cam by the restoring force of the spring. However, the automatic switching device for a mobile phone has a disadvantage in that its structure is complicated.

Republic of Korea Utility Model Registration No. 202255 (registered on August 28, 2000) introduces "Hinge device of mobile phone".

The hinge device of the mobile phone, when the button is pressed, the folder is automatically opened and closed by the restoring force of the spring, and when the folder is closed, the locking protrusion is inserted into the groove formed in the folder to prevent the folder from being opened. However, since the hinge device of the mobile phone must have a locking means for maintaining the fixed state of the folder, after molding the mobile phone main body and the folder, grooves for the locking means must be separately processed. Because the folder is not closed well, and the projection is disposed inside the main body of the mobile phone, there is a problem that the user's face may be damaged by the projection during the call.

Accordingly, an object of the present invention is to open the folder of the mobile phone with a simple structure without a battery, because the folder is automatically opened by pressing the button member in the closed state, the projection of the button member is moved along the cam shape by the restoring force of the spring. It is to provide a hinge device for a mobile phone.

1 is an exploded perspective view showing an example of a hinge device for a mobile phone according to the present invention

2 is an exploded view of the housing of FIG.

3 is an exploded perspective view illustrating an example in which the hinge device for a mobile phone of FIG. 1 is mounted on a mobile phone, and a detailed view illustrating the mounting of a button member;

4 is an exploded view showing the rear cover of FIG.

5 is an exploded view showing the front cover of FIG.

Figure 6 is a front view showing the operation projection of the shaft

7 is an exploded view showing the housing deployed to show a process in which the actuating projection of the shaft is seated on the first cam shape of the housing;

8a to 8d is a partial cutaway cross-sectional view for explaining the operation of the hinge device for a mobile phone of the present invention and corresponding developments respectively

9 illustrates another example of a hinge device for a mobile phone according to the present invention.

(A) Partial cross-sectional view showing a part cut away

(B) development

10 shows another example of a hinge device for a mobile phone according to the present invention.

(A) Partial cross-sectional view showing a part cut away

(B) development

* Description of Signs of Main Parts of Drawings *

10 housing 17 first cam shape

30: rear cover 35: second cam shape portion

40: front cover 46: third cam shape

50: shaft 60: spring

70: button member

An example of a hinge device for a mobile phone according to the present invention for achieving the above object is a cylindrical housing having a first cam shape formed on an inner circumferential surface thereof, a rear cover disposed at a lower end of the housing, and having a second cam shape formed thereon; A front cover mounted to an upper end of the housing and having a third cam shape, a shaft mounted to the housing through the front cover and having a pair of upper actuating protrusions and a pair of lower actuating protrusions, between the shaft and the rear cover; Spring is disposed in, and characterized in that consisting of a button member mounted on the top of the shaft.

The housing has a plurality of protrusions formed in the longitudinal direction on the outer circumferential surface, a plurality of long grooves are formed in the longitudinal direction on the inner circumferential surface, and a plurality of pockets are formed at the upper end and the lower end of the inner circumferential surface, respectively. It is characterized in that the cam shape is formed to protrude.

The first cam portion has a right inclined portion and a left inclined portion facing each other, and an upper end of the right inclined portion and an upper end of the left inclined portion are spaced apart by a predetermined gap. It is spaced apart by, characterized in that the stop groove is formed on the lower end of the inclined portion.

The rear cover is characterized in that the lower end of the cylindrical portion is sealed by the supporting portion, a plurality of projections and hook projections are formed on the outer circumferential surface of the cylindrical portion, and a second cam shape portion having a slope at the upper end is formed.

The front cover has a support portion formed at an upper end of the cylindrical portion, a hollow portion is formed at the center of the support portion, a plurality of protrusions and hook projections are formed on the outer circumferential surface of the cylindrical portion, and a third cam shape portion is formed at the bottom of the cylindrical portion It is characterized by.

The third cam-shaped portion is characterized in that the stop groove is formed at the lower end of the inclined portion, the slopes of the inclined portion and the stop groove has the same inclination angle.

The shaft is provided with a spring mounting portion at the bottom, a pair of upper operating projections and a pair of lower operating projections formed on the top of the spring mounting portion, characterized in that the button member mounting portion is formed on the top.

The upper actuating protrusion may be formed such that a vertex of the upper end corresponds to the stop groove of the third cam portion of the front cover, and the upper left inclined surface is formed at an angle equal to the inclination angle of the inclined portion of the third cam portion of the front cover. do.

The lower actuating projection is formed such that the lower inclined surface corresponds to the slope of the second cam portion of the rear cover, the vertex of the upper end is formed to correspond to the stop groove of the first cam-shaped portion of the housing, and the upper left inclined surface is the first of the housing. It is characterized by being formed at the same angle as the inclination angle of the cam portion.

The button member has a first clearance between the edge portion and the inlet of the mounting groove in a state of being fitted into the mounting hole of the mobile phone body, and is arranged to have a second clearance between the edge portion and the stepped portion of the mounting hole. .

Another example of the hinge device for a mobile phone according to the present invention is characterized in that only the lower operating protrusion may be formed on the shaft without the upper operating protrusion.

Another example of a hinge device for a mobile phone according to the present invention includes a cylindrical housing having a first cam shape formed on an inner circumferential surface thereof, a rear cover disposed on a lower end of the housing, and a third cam shape formed on an upper end of the housing. A front cover, a shaft mounted to the housing through the front cover and having a pair of upper operating protrusions and a pair of lower operating protrusions, a spring disposed between the shaft and the rear cover, and mounted on an upper end of the shaft Consisting of a button member,

The housing has a stop groove formed at the lower end of the inclined portion in the first cam shape, the slope is formed in the opposite direction to the inclined portion at the lower end of the inclined portion,

The shaft is inclined such that the lower inclined portion of the upper actuating protrusion corresponds to the slope of the first cam-shaped portion of the housing, so that the lower inclined portion of the upper actuating protrusion can slide along the slope of the first cam-shaped portion when the shaft descends. It features.

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

Referring to FIG. 1, a hinge device 1 for a mobile phone according to a first embodiment of the present invention includes a cylindrical housing 10 having a first cam portion 17 (see FIG. 2) formed on an inner circumferential surface thereof, and the housing ( 10 is disposed at the lower end of the rear cover 30, the second cam-shaped portion 35 is formed, the front cover 40 is mounted on the upper end of the housing 10, and the third cam-shaped portion 46 is formed; A shaft 50 mounted to the housing 10 through the front cover 40 and having a pair of upper actuating protrusions 52 and 52 'and a pair of lower actuating protrusions 53 and 53'; It is composed of a spring 60 disposed between the shaft 50 and the rear cover 30, and a button member 70 mounted on the upper end of the shaft 50.

1 and 2, the housing 10 has a plurality of protrusions 12 formed on the outer circumferential surface 11 in the longitudinal direction and a plurality of long grooves 14 on the inner circumferential surface 13. A plurality of pockets 15 and 16 are formed at upper and lower ends of the inner circumferential surface 12, respectively, and a first cam shape portion 17 protrudes from the inner circumferential surface.

Referring to FIG. 2, the first cam portion 17 has a right inclined portion 18 (when viewing a drawing) and a left inclined portion 18 '(when viewing a drawing) face each other, and the right inclined portion ( The upper end of the inclined portion 18 'and the upper end of the left inclined portion 18' are spaced apart by a predetermined gap S. Similarly, the lower end of the left inclined portion 18 'and the lower end of the right inclined portion 18 are disposed in the predetermined gap ( Spaced apart by S), the stop groove (19, 19 ') is formed at the lower end of the inclined portion (18, 18').

The inclined portions 18, 18 'and the slopes 21, 21' of the stop grooves 19, 19 'have the same inclination angle a.

Thereby, as shown in FIG. 3, when the hinge device 1 for a mobile phone according to the present invention is mounted in the mounting groove 81 of the mobile phone folder 80, the housing 10 has an outer circumferential surface 11. The projections 12 formed in the fitting grooves are inserted into the plurality of recessed grooves 82 formed inside the mounting groove 81 of the mobile phone 80, so that the housing 10 is mounted to the mounting groove 81 of the mobile phone 80 In the closed state.

1 and 4, the rear cover 30 is closed at the lower end of the cylindrical portion 31 by the support portion 32, and a plurality of protrusions 33 and the outer circumferential surface of the cylindrical portion 31. A hook protrusion 34 is formed, and a second cam shape portion 35 having slopes 36 and 36 'is formed at an upper end thereof.

1 and 5, the front cover 40 has a supporting portion 42 formed at an upper end of the cylindrical portion 41, and a hollow portion 43 formed at the center of the supporting portion 42. A plurality of protrusions 44 and hook protrusions 45 are formed on the outer circumferential surface of the cylindrical portion 41, and a third cam-shaped portion 46 is formed at the lower end of the cylindrical portion.

The third cam portion 46 has stop grooves 48 and 48 'formed at the lower ends of the inclined portions 47 and 47', and the inclined portions 47 and 47 'and the stop grooves 48 and 48'. The slopes 49 and 49 'have the same inclination angle a.

Incidentally, the inclined portions 47 and 47 'of the third cam portion 46 and the stop grooves 48 and 48' are inclined portions of the first cam shaped portions 17 and 17 'of the housing 10. 18, 18 ') and inclined angles a such as stop grooves 19, 19'.

Referring to FIG. 1, the shaft 50 has a spring mounting portion 51 formed at a lower end thereof, and a pair of upper actuating protrusions 52 and 52 ′ and a pair of lower actuations on an upper portion of the spring mounting portion 51. Protrusions 53 and 53 'are formed, and a button member mounting portion 54 is formed at the upper end.

Referring to FIG. 6, the upper operation protrusion 52 is formed such that a vertex portion 55 at an upper end thereof corresponds to the stop groove 48 of the third cam portion 46 of the front cover 40. In particular, the upper left inclined surface 56 is formed at the same angle as the inclined portion a of the inclined portion 47 of the third cam portion 46 of the front cover 40.

The lower actuating protrusion 53 is formed such that the lower inclined surface 57 corresponds to the inclined surface 36 of the second cam shape portion 35 of the rear cover 30, and the upper end vertex portion 58 has a housing 10. It is formed to correspond to the stop groove 19 of the first cam-shaped portion (17) of. In particular, the upper left inclined surface 59 is formed at the same angle as the inclination angle a of the first cam-shaped portion 17 of the housing.

Referring to FIG. 3, the button member 70 has a first clearance d between the edge portion 71 and the inlet of the mounting groove 86 in a state of being fitted into the mounting hole 86 of the cellular phone body 85. And a second play L between the edge portion 71 and the step portion 87 of the mounting hole 86. As a result, the button member 70 can be pressed or retracted by the play in a state where the button member 70 is mounted in the mounting hole 86 of the cellular phone main body 85.

The hinge device for a mobile phone according to the present invention configured as described above can be assembled as follows.

First, the front cover 40 is mounted on the top of the housing 10, and the shaft 50 is fitted through the bottom of the housing. At this time, as shown in Fig. 7, the upper operation projection 52 of the shaft 50 is the right inclined portion 18 and the left inclined portion 18 of the first cam-shaped portion 17 of the housing 10 It is raised in the direction of the arrow 91 to pass through the gap S between ').

Thereafter, the rear cover 30 is mounted on the lower end of the housing 10 so that the spring 60 is mounted on the spring mounting portion 51 of the shaft 50. At this time, the protrusion 33 and the hook protrusion 34 of the rear cover 30 are inserted into the long groove 14 and the pocket 16 of the housing 10.

Thereafter, the front cover 40 is mounted on the upper end of the housing 10. At this time, the front cover 40, like the rear cover 30, the projection 44 and the hook projection 45 is fitted to be coupled to the long groove 14 and the pocket 15 of the housing 10.

Thereafter, the button member 70 is mounted on the button member mounting portion 54 of the shaft 50, and as shown in FIG. 3, the housing 10 of the hinge device 1 of the present invention is mounted on the cellular phone folder 80. After fixing to the mounting groove 81 of the), the button member 70 is inserted so as to pass through the mounting hole 86 of the hand bone main body (85).

The operation of the hinge device for a mobile phone according to the present invention constructed and assembled as described above will be described with reference to FIGS. 8A to 8C.

In the assembled state as described above, the cellular phone folder is open, and in the state in which the folder is closed as shown in (a) and (b) of 8a, the hinge device for the cellular phone is operated by the spring 60 to operate the upper part of the shaft 50. The protrusion 52 and the lower actuating protrusion 53 are the stop groove 48 of the third cam portion 46 of the front cover 40 and the stop groove of the first cam portion 17 of the housing 10. 19).

In the state of FIG. 8A, when the button member 70 is pressed as shown in FIG. 8B, the spring 60 is compressed by the lowering of the shaft 50, and as shown in (B) of FIG. 8B, the shaft The lower inclined surface 57 of the lower actuating protrusion 53 (shown in dashed lines) of the 50 descends to the upper end of the slope 36 of the second cam-shaped portion 35 of the rear cover 30, and then the above is continued. As the lower actuating protrusion 53 (indicated by a solid line) descends along the slope 36 of the second cam portion 35, the shaft 50 rotates slightly by the length of the slope 36, and The lower actuating protrusion 53 and the upper actuating protrusion 52 are positioned below the inclined portion 18 of the first cam portion 17 and below the inclined portion 47 of the third cam portion 46. do.

Subsequently, when the force applied to the button member 70 is removed, by the restoring force of the compressed spring 60, as shown in (b) of FIG. 8C, the lower operation protrusion 53 (dashed line) of the shaft 50, and The upper actuating protrusions 52, as shown by the dotted lines, of the lower end of the inclined portion 18 of the first cam portion 17 of the housing 10 and of the third cam portion 46 of the front cover 40. The lower working protrusion 53 and the upper operating protrusion 52 are inclined by the restoring force of the spring 60 to be inclined to the lower portion of the inclined portion 47, and then, by the restoring force of the spring 60. 18) and the inclined portion 47 of the third cam portion 46 of the front cover 40 to move to the upper end of the inclined portion (18, 47). At this time, as shown in (a) of FIG. 8C, the housing 10 and the shaft 50 rotate relative to each other. As a result, the cellular phone folder including the housing 10 is rotated relative to the handbone main body including the button member 70 of the shaft, thereby opening the cellular phone folder. In addition, an open cellular phone folder can be manually closed as described above.

Referring to FIG. 9, the mobile phone hinge device 1 according to the second embodiment of the present invention is a modification of the mobile phone hinge device of the first embodiment, in which only the lower operation protrusion 53 is formed on the shaft 50. And the second cam portion is not formed in the front cover 40, so that only the actuating protrusion 53 performs a sliding movement along the inclined portion 18a of the first cam portion 17a of the housing 10. Except for the configuration and operation of the hinge device for a mobile phone of the first embodiment except for the same.

Referring to FIG. 10, the hinge device 100 for a mobile phone according to the third embodiment of the present invention includes a cylindrical housing 110 having a first cam shape 117 formed on an inner circumferential surface thereof, and a lower end of the housing 110. A rear cover 30 disposed on the front cover, a front cover 140 mounted on an upper end of the housing 110 and having a third cam portion 146 formed therethrough, and a housing 110 penetrating through the front cover 140. A shaft 150 mounted on the shaft 150 having a pair of upper actuating protrusions 152 and a pair of lower actuating protrusions 153, and a spring 160 disposed between the shaft 150 and the rear cover 130; It is composed of a button member 170 mounted on the top of the shaft 150.

In the hinge device for a mobile phone 100 configured as described above, the housing 110 has a stop groove 119 is formed at the lower end of the inclined portion 118 in the first cam-shaped portion 117, the inclined portion ( The lower surface of the 118 has the same configuration as the housing of the first embodiment except that the slope 120 is formed in the opposite direction to the inclined portion 118.

The shaft 150 is inclined such that the lower inclined portion 153 of the upper operation protrusion 152 corresponds to the slope 120 of the first cam-shaped portion 117 of the housing 110, such that the shaft 150 is lowered. When the lower inclined portion 153 of the upper actuating projection 152 can slide along the slope 120 of the first cam-shaped portion 117 has the same configuration as the shaft of the first embodiment.

Therefore, in the hinge device 100 for the cellular phone of the third embodiment of the present invention, it is not necessary to form a second cam shape having a slope at the upper end of the rear cover 130.

Therefore, when the button device 170 is pressed, the hinge device 100 for a mobile phone according to the second embodiment of the present invention inclines the lower portion of the upper operation protrusion 152 of the shaft 150 by lowering the shaft 150. The unit 153 operates in the same manner as the hinge device for a mobile phone of the first embodiment, except that the unit 153 slides along the slope 120 of the first cam portion 117.

As described above, the hinge device for a mobile phone according to the present invention has a simple structure, low production cost, and can automatically open a folder, thereby making it easy to use.

Claims (12)

A cylindrical housing 10 having a first cam portion 17 formed on an inner circumferential surface thereof, a rear cover 30 disposed at a lower end of the housing 10 and having a second cam portion 35 formed thereon; 10, a front cover 40 having a third cam portion 46 formed thereon, and a pair of upper actuating protrusions 52 and 52 which are mounted to the housing 10 through the front cover 40 and are mounted to the housing 10. ') And a pair of lower actuating projections 53 and 53', a spring 60 disposed between the shaft 50 and the rear cover 30, and the shaft 50 The hinge device for a mobile phone, characterized in that consisting of a button member 70 mounted on the top. The method of claim 1, The housing 10 has a plurality of protrusions 12 formed on the outer circumferential surface 11 in the longitudinal direction, a plurality of long grooves 14 formed on the inner circumferential surface 13 in the longitudinal direction, and an upper end portion of the inner circumferential surface 12. And a plurality of pockets (15, 16) are formed at the lower end, respectively, and the first cam-shaped portion (17) protrudes from the center of the inner circumferential surface. The method of claim 2, The first cam portion 17 has a right inclined portion 18 and a left inclined portion 18 'facing each other, and an upper end of the right inclined portion 18 and an upper end of the left inclined portion 18' are predetermined. Are spaced apart by a gap S, and the lower end of the left inclined portion 18 'and the lower end of the right inclined portion 18 are spaced apart by a predetermined gap S, and the inclined portions 18 and 18' are separated from each other. Hing device for a mobile phone, characterized in that the stop groove (19, 19 ') is formed at the bottom of the. The method of claim 1, The rear cover 30 is closed at the lower end of the cylindrical portion 31 by the support portion 32, a plurality of projections 33 and the hook projection 34 is formed on the outer peripheral surface of the cylindrical portion 31, A hinge device for a mobile phone, characterized in that a second cam-shaped portion (35) having slopes (36, 36 ') is formed at the top. The method of claim 1, The front cover 40 has a support portion 42 formed on the upper end of the cylindrical portion 41, a hollow portion 43 is formed in the center of the support portion 42, the outer peripheral surface of the cylindrical portion 41 A plurality of protrusions (44) and hook protrusions (45) are formed in the hinge device for a mobile phone, characterized in that the third cam portion 46 is formed at the lower end of the cylindrical portion. The method of claim 5, wherein The third cam portion 46 has stop grooves 48 and 48 'formed at the lower ends of the inclined portions 47 and 47', and the inclined portions 47 and 47 'and the stop grooves 48 and 48'. Slope (49, 49 ') of the hinge device for mobile phones, characterized in that it has the same inclination angle (a). The method of claim 1, The shaft 50 has a spring mounting portion 51 formed at a lower end thereof, and a pair of upper actuating protrusions 52 and 52 'and a pair of lower actuating protrusions 53 and 53' on an upper portion of the spring mount 51. ) Is formed, the hinge device for a mobile phone, characterized in that the button member mounting portion 54 is formed on the top. The method of claim 7, wherein The upper operation protrusion 52 is formed such that the upper end vertex portion 55 corresponds to the stop groove 48 of the third cam portion 46 of the front cover 40, and the upper left inclined surface 56 has a front portion. A hinge device for a mobile phone, characterized in that formed at an angle equal to the inclined portion 47 and the inclined angle a of the third cam-shaped portion 46 of the cover 40. The method of claim 7, wherein The lower actuating protrusion 53 is formed such that the lower inclined surface 57 corresponds to the inclined surface 36 of the second cam shape portion 35 of the rear cover 30, and the upper end vertex portion 58 has a housing 10. Is formed to correspond to the stop groove (19) of the first cam-shaped portion 17 of the, and the upper left inclined surface (59) is formed at the same angle as the inclination angle (a) of the first cam-shaped portion (17) of the housing The hinge device for a mobile phone, characterized in that. The method of claim 7, wherein The shaft 50 is a hinge device for a mobile phone, characterized in that only the lower operating projections 53 can be formed without the upper operating projections. The method of claim 1, The button member 70 has a first clearance d between the edge 71 and the entrance of the mounting groove 86 in a state of being fitted into the mounting hole 86 of the mobile phone main body 85, and the edge portion ( A hinge device for a mobile phone, characterized in that it is arranged to have a second clearance (L) between the 71 and the stepped portion (87) of the mounting hole (86). A cylindrical housing 110 having a first cam shape 117 formed on an inner circumferential surface thereof, a rear cover 30 disposed at a lower end of the housing 110, and a third cam mounted on an upper end of the housing 110. A front cover 140 having a shape portion 146, and a pair of upper actuating protrusions 152 and a pair of lower actuating protrusions 153 are mounted to the housing 110 through the front cover 140. Is formed of a shaft 150, a spring 160 disposed between the shaft 150 and the rear cover 130, and a button member 170 mounted on the upper end of the shaft 150, The housing 100 has a stop groove 119 formed at a lower end of the inclined portion 118 in the first cam-shaped portion 117, and in a direction opposite to the inclined portion 118 at the lower end of the inclined portion 118. Slope 120 is formed, The shaft 150 is inclined such that the lower inclined portion 153 of the upper operation protrusion 152 corresponds to the slope 120 of the first cam-shaped portion 117 of the housing 110, such that the shaft 150 is lowered. When the lower inclined portion 153 of the upper actuating projection 152 can slide along the slope 120 of the first cam-shaped portion 117, the hinge device for a mobile phone.