KR200284270Y1 - Hinge apparatus capable of automatically and manually opening/closing a folder and a foldable apparatus employing the same - Google Patents

Abstract

A hinge device applicable to a device capable of automatically opening or closing a folder of a mobile phone is disclosed. The hinge device is accommodated in the central hinge arm of the mobile phone and interlocked to allow rotational force transmission therebetween, and interlocked with the side hinge arm of the mobile phone. In the housing, the second cam member, the first cam member, the reduction gear unit wrapped in the first coil spring, the clutching member fastened to the output shaft of the reduction gear unit and rotatably engaged with the second cam member, and the motor are sequentially received. do. The first coil spring pushes the first cam member toward the second cam member, and the second coil spring pushes the snap ring toward the second cam member. When the user forcibly opens or closes the folder manually, the second cam member rotates about 180 degrees, during which the first cam member and the snap ring are pushed by the second cam member and then advanced again by the elastic force, thereby causing the second cam member to rotate. Engage with again. When the user instructs the automatic opening and closing by pressing the opening and closing key, the driving power is supplied to the motor and the snap ring rotates by the rotational force of the motor transmitted through the reduction gear unit. The second cam member is integrally rotated in an engaged state with the snap ring by the elastic force of the second coil spring, and a rotational force is transmitted to the side hinge arm interlocked with the cam shaft of the second cam member to open and close the folder.

Description

Hinge apparatus capable of automatically and manually opening / closing a folder and a foldable apparatus employing the same}

The present invention relates to a hinge device, and more particularly, it is applied to a foldable product such as a flip-type or folder-type mobile phone to hinge the folder to the base and combine the folder in the automatic mode. Or it relates to a hinge device for opening and closing in manual mode.

In a flip type or folder type mobile phone, a flip or folder (collectively referred to as a "folder" except when necessary) should be opened and closed, so it is generally hinged with the main body of the mobile phone. In the case of the opening / closing mechanism of the folder of a mobile phone which is widely spread in the past, the structure of the user opening and closing the folder by hand is mostly. The present inventors proposed and devised a device that can automatically open and close the folder by using a motor drive from the viewpoint of convenience and functionality of the mobile phone, such as opening the folder with one hand. Publication No. 10-2000-29158, Name of the device: Cover opening for cell phone).

The cover opening and closing device for a mobile phone receives a fixed cam, a rotary cam, a gear box, a motor, a spacer, a spring, and the like in a housing, and has a structure in which the cam shaft of the fixed cam is exposed to the outside of the housing. If the gearbox decelerates the rotational force generated by the rotation of the motor to obtain greater torque, and rotates the rotating cam, the fixed cam, which is rotatably engaged with the rotating cam, also rotates. Here the spring acts to allow the rotary cam to engage with the stationary cam. That is, the spring is disposed behind the motor to push the motor toward the fixed cam, so that the gearbox and the rotary cam are also pushed toward the fixed cam, so that the rotary cam can rotate in engagement with the fixed cam.

By the way, the device has a structure in which the springs are arranged in series behind the motor, so that the overall length is generally long. Such a long structure device may not have a big problem in mounting when the size of the mobile phone to be applied is large, but there is a problem in applying to a mobile phone which is getting smaller in recent years. Improvements to shorter and more compact structures are needed.

In addition, the original function of the spring is to make the rotary cam mesh well with the fixed cam, so even though it is enough to push the rotary cam toward the fixed cam, it is also designed to push the motor and gearbox together. There is also absurdity to be employed.

Furthermore, the body and the folder have electrical connections via a data bus made of a flexible PCB. The mounting space of the device is also the place where the data bus passes, and the appearance of the device can also impede the passage of the data bus, so improvement is required.

The present invention can be designed in a more compact and compact structure compared to the conventional hinge device, the manual mode by the user's force is mounted on the hinge coupling portion of the structure of the structure that can be opened and closed by the folder and the main body hinge Another object is to provide an improved hinge device for opening and closing a folder in an automatic mode by a motor drive.

Furthermore, an object of the present invention is to provide a folding device which can open and close a folder in a manual mode and an automatic mode by employing the hinge device as described above.

1 is an exploded perspective view showing the configuration of a hinge device according to a first embodiment of the present invention.

FIG. 2A is a cutaway perspective view of an assembled state of the hinge apparatus according to the first embodiment of FIG. 1, and FIG. 2B is a front view as viewed in the direction "A" of FIG. 2A.

3 is a cross-sectional view of the assembled state of the hinge device according to the first embodiment of FIG.

4 is a cross-sectional view taken along the line F-F ′ of FIG. 3.

FIG. 5 is a cross sectional view taken along the line E-E 'of FIG. 3, and (A) and (B) show cases where the phase of the second cam member is 0 degrees and 180 degrees, respectively.

6 is an exploded perspective view showing the configuration of a hinge device according to a second embodiment of the present invention.

7 is a perspective view showing an intermediate assembly (temporary assembly) state of the hinge device according to the second embodiment of FIG.

8 is an exploded perspective view of the assembled state of the hinge device according to the second embodiment of FIG.

9 is an exploded perspective view showing the configuration of a hinge device according to a third embodiment of the present invention.

10 is a cutaway perspective view of the assembled state of the hinge device according to the third embodiment of FIG.

11 is a perspective view showing a closed state of the clamshell-type mobile phone to which the hinge device of the present invention is applied.

12 is a perspective view showing an open state of the folding-type mobile phone to which the hinge device of the present invention is applied.

13 and 14 are exploded perspective views for explaining a method of mounting the hinge device of the present invention to a folding mobile phone.

15 is a cutaway perspective view showing a state in which the hinge device of the present invention is mounted on a clamshell-type mobile phone.

16A and 16B are diagrams for explaining that the hinge device of the present invention can adequately provide a passage space of a data bus for electrically connecting a folder of a mobile phone and a phone main body.

17 is a block diagram showing a configuration of a first embodiment of a circuit for driving a motor of the hinge apparatus according to the present invention.

18 is a block diagram showing a configuration of a second embodiment of a circuit for driving a motor of the hinge apparatus according to the present invention.

19 to 24 are flowcharts for explaining a procedure for automatically opening and closing a folder using a hinge device according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: motor 20: coupling elements

34a, 34b, 34c, 34d: carriers

36a, 36b, 36c, 36d: sun gears

40a, 40b, 40c, 40d: planet gears

50: output shaft

60: reduction gear train

70: ring gear portion

80: reduction gear unit

90: first cam member 100: second cam member 106: cam shaft 110: housing

120: elastic member (first coil spring) 130: clutching member

132: second coil spring 134: snap ring (snap ring)

136: washer

200, 200-1, 200-2: hinge apparatus

300: mobile phone

310a, 310b: side hinge arm

312: inserting groove

320: central hinge arm

330: opening / closing key

340: phone body 350: folder

According to an aspect of the present invention for achieving the above object, the rotary power means for providing a rotational force in the forward and / or reverse direction through the output shaft; A first cam member fitted to the output shaft; A second cam member having a camshaft for transmitting rotational force, the second cam member being rotatably engaged with the first cam member; An elastic member supporting the first cam member with an elastic force and pushing toward the second cam member; It is fastened to rotate integrally with the output shaft of the rotational power means and is rotatably engaged with the second cam member. When rotational force is provided from the rotational power means, the second cam member is engaged with the rotational force, and the rotational force is determined. A clutching member which transmits to the two cam members and rotates integrally, and when the rotational force is provided from the second cam member, the engagement with the second cam member is released to allow free rotation of the second cam member; And receiving the second cam member, the first cam member, the clutching member, the elastic member, and the rotational power means in a substantially cylindrical space, wherein the camshaft of the second cam member is exposed to the outside and the rotational power The hinge device is fixedly coupled to the means, and has a housing which is interlocked with the first cam member so as to enable rotational force transmission therebetween.

In the hinge device, the clutching member is fastened to surround the output shaft of the reduction gear unit to provide an elastic force; And fitted into the chamfered portion of the output shaft and rotatably engaged with the second cam member while being supported by the elastic force of the second coil spring to rotate integrally with the second cam member or to retreat along the output shaft. And a snap ring to allow free rotation of the second cam member. Furthermore, the clutching member may further include a washer fastened to the lower end of the output shaft of the reduction gear unit to support the lower end of the second coil spring.

The hinge device can be operated in a manual mode and an automatic mode, respectively.

In order to obtain a structure that is advantageous for the miniaturization of the hinge device, the elastic member is preferably fastened to surround the body of the rotation driving means and a coil spring that pushes the first cam member toward the second cam member with elastic force.

According to another aspect of the present invention, comprising a first member and a second member to form a hinge coupling through the hinge device, by applying a force from the outside to the first member and the second member in the manual mode or by opening the motor Provided is a foldable apparatus that can be opened and closed in an automatic mode by using a rotational force obtained by driving.

The clamshell device comprises a central hinge arm fixed to one end of the first member and providing a cylindrical receiving space; A pair of side hinge arms fixed to a predetermined portion on the second member and spaced apart from each other by a predetermined interval so that the central hinge arm can be inserted therebetween; It is interlocked in the central hinge arm and interlocked to allow rotational force transmission therebetween, and interlocked to allow rotational force transmission with at least one of the pair of side hinge arms, thereby allowing the motor to rotate the first member and the second member. Hinge device to enable the automatic mode opening and closing using the rotational force or the manual mode opening and closing by the user's force; And motor driving means for supplying driving power to the motor built in the hinge device in response to the user's automatic opening and closing instruction.

The configuration of the hinge device is substantially the same as above, except that the housing is accommodated in the central hinge arm and interlocked to allow rotational force transmission therebetween.

The motor driving means specifically includes a battery; An opening and closing key for instructing automatic opening and closing of the foldable device; A control unit outputting an opening / closing control signal for enabling forward or reverse rotation of the motor in response to the output of the opening / closing key; And a motor driver for supplying charging power of the battery to the motor as driving power having a polarity corresponding to the type of the open / close control signal in response to the output of the open / close control signal. Further, the motor driving means further has an overcurrent detecting section for detecting whether the current flowing into the motor driving section exceeds a threshold current value for overload detection.

According to this configuration, the opening and closing by the manual mode, when the external cam is applied to the second cam member, the second cam member is rotated by this rotation each of the first cam member and the closing member By retracting along the output shaft of the reduction gear unit and advancing by the elastic force of the first elastic member and the clutching member itself to re-engage with the second cam member to allow rotation of the second cam member. Is done. Further, the opening and closing by the automatic mode, the snap ring is rotated by the rotational force of the motor transmitted through the reduction gear unit, wherein the second cam member and the first cam member by the elastic force of the clutching member The first cam member is retracted along the output shaft of the reduction gear unit and then advanced to reengage with the second cam member during rotation of the second cam member.

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

1 to 5 show a hinge device 200 according to the first embodiment of the present invention. The hinge device 200 according to the first embodiment includes a motor 10, a reduction gear unit 80, first and second cam members 90 and 100, a housing 110, an elastic member 120, and a clutch. It has a ching member 130.

The motor 10 and the reduction gear unit 80 are provided as an example of the rotational power means for providing the rotational force in the forward or reverse direction through the output shaft 50. The motor 10 and the reduction gear unit 80 are integrally fixed to each other to reduce the rotational force of the motor 10 to form a geared motor that generates a rotational force with a greater torque through the output shaft 50. desirable.

As long as the motor 10 can generate a clockwise or counterclockwise rotational force by the driving power source, any kind of motor can be applied. Depending on the usage environment of the hinge device, the most suitable type of motor may be selected and used. For example, when used as a hinge device of a folding cellular phone to be described later, it is preferable to use a small DC motor capable of forward or reverse rotation depending on the voltage polarity of the driving power source. The motor 10 has a drive power supply line 18 connected to one side of the body 12 and a bushing 14 and a motor shaft 16 on the other side.

The reduction gear unit 80 functions to reduce the motor rotational force and convert it to a rotational force having a large torque. If this function can be satisfied, there is no limitation on the configuration of the reduction gear unit 80. As an example, the case where the reduction gear unit 80 is configured by using the planetary gear assembly is illustrated in the drawing. According to this configuration example, the reduction gear unit 80 includes a ring gear portion 70, a reduction gear train 60, and an output shaft 50.

The ring gear 70 is a ring gear 74 having a gear tooth 76 formed on an inner wall thereof, and a fixing part for fixing the ring gear 74 to the motor 10 to prevent rotation of the ring gear 74. It consists of 72. One side of the ring gear 74 is closed by the bottom surface 75 formed with a through hole for exposing only the output shaft 50 to the outside, and the fixing portion is open. The fixing portion 72 is to prevent the ring gear 74 from being rotated by being fixed to the body 12 of the motor, so that the ring gear 74 is firmly connected to the body 12 of the motor 10 by welding or bonding using an adhesive. It is preferable to combine. As shown in the drawings for stronger bonding, irregularities may be formed on the inner surface thereof. Although not shown, a method of directly fixing the ring gear 74 to the housing 110 is also possible.

The reduction gear unit 80 includes a plurality of planetary gears 40a, 40b, 40c, and 40d rotatably supported by carriers 34a, 34b, 34c, and 34d, respectively, and respective planetary gears 40a, 40b, 40c, and 40d. And a reduction gear train 60 housed in the ring gear 74 by cascading a plurality of gear reduction gear stages composed of sun gears 36a, 36b, 36c, and 36d engaged with each other. The reduction gear train 60 serves to reduce the rotational force of the motor 10 to produce a larger torque.

The number of stages of the reduction gear train 60 may be determined in consideration of the required torque, rotational speed and output torque and rotational speed of the reduction gear unit 80. The figure shows an example of the configuration of the four-speed reduction gear. Each planetary gear set 40a, 40-b, 40-c, 40d is fixed to each carrier 34a, 34b, 34c, 34d and rotates integrally. The first set of planetary gear sets 42-1, 42-2, 42-3 is rotatably supported by the carrier 34a at the rear thereof, engages with the ring gear 74, and at the same time, the sun gear 30a is disposed and engaged with it. Subsequent stages are combined in the same manner to form a gear train as a whole. The above description or illustration of the gear train is only one example of the reduction gear unit 80. Any type of reduction gear may be employed as long as it is capable of reducing the rotational force of the motor and converting it into a desired torque and rotational force.

The output shaft 50 is integrally fixed to the far end carrier 34d of the reduction gear train 60. The shaft portion 54 of the output shaft 50 spans the through hole formed in the bottom surface 75 of the ring gear 74, and the shaft portion 56 is exposed to the outside of the ring gear 74 to form a clutching member 130. ) Is combined. In order to transfer the rotational force to the second cam member 100 via the snap ring 134 and through the snap ring 134, the axial portion 52 of the output shaft 50 is preferably made in the form of a chamfer.

The rotational force of the motor 10 is first transmitted to the sun gear 30a of the front end, and a direct coupling method and a solar gear coupling to directly insert the sun gear 30a into the motor shaft 16 as a coupling method for this purpose. If 30a) is small, there is an indirect coupling method of coupling the coupling member 20 to allow the rotational force to be transmitted to each other. For the indirect coupling method, the coupling member 20 is composed of a first coupler 22 fixed to the motor shaft 16 and a second coupler 28 fixed to the input end sun gear 36a. The 22 and the second coupler 28 have a structure that is interlocked so as to enable rotational force transmission therebetween. The protruding rods 26a, 26b, 26c of the first coupler 24 are caught in the recesses of the second coupler 28 so that rotational force is transmitted.

The first cam member 90 has a substantially cylindrical structure with both sides open, and is coupled to the output shaft 50 of the reduction gear unit 80, in particular, the output shaft 50 penetrates to the center thereof, thereby extending the length of the output shaft 50. Can be moved in the rotation direction (Φ) is coupled so that the rotational force transmission between each other is not made. In this cylinder, a clutching member 130 in a state of being fastened to the output shaft 50 of the reduction gear unit 80 is accommodated. This cylinder preferably has a size such that the tip of the reduction gear unit 80 can move forward and backward. The upper end 94 of the cylinder is formed with a pair of valleys 92a and 92b rotatably engaged with the hills 104a and 104b of the second cam member at 180 degree intervals. A convex portion 96 is formed on the cylindrical side surface of the first cam member 90. In the assembled state, the first cam member 90 is supported by the elastic member 120 at the lower end of the cylinder and engaged with the second cam member 100.

The second cam member 100 has a shape corresponding to the pair of valleys 92a and 92b of the first cam member 90 at the edge of one side of the second cam member 100 with the disk 102 as the center. A pair of peaks 104a and 104b are formed, and in the center of the other side, the camshaft 106 is chamfered to extend. One or more grooves 109a and 109b are formed on the surface of the disc 102 on which the mountains 104a and 104b are formed. Further, the first and second protrusions 105a and 105b spaced apart by 180 degrees are formed on the side surface of the disc 102.

At the time of assembly, the pair of peaks 104a and 104b of the second cam member 100 rotatably engage the pair of valleys 92a and 92b of the first cam member 90, and the grooves 109a and 109b. ) Is rotatably engaged with one or more protrusions 134a and 134b formed on one side of the snap ring 134 of the clutching member 130. The disc 102 of the second cam member 100 is received inside the housing 110 and supported by the bottom 116, and the camshaft 106 is exposed and extended outside the housing 110.

The valleys 92a and 92b of the first cam member 90 are flat, and when the hills 104a and 104b of the second cam member 100 are raised in the flat section, the valleys 92a and 92b are raised. It is desirable to be able to maintain the state without slipping. If a flat section is provided on the first cam member 90, it is disadvantageous for complete cam matching with the second cam member 100. However, in the case of the mobile phone 300 employing the hinge device 200, the folder 350 may be used if necessary. The folder 350 may be opened at a desired angle without completely opening it. Such a function may be adapted to the case of playing the Internet or a game with the mobile phone 300, for example. Alternatively, it may be possible that there are no flat sections between valleys 92a and 92b or between hills 104a and 104b. In this case, when one peak 104a climbs up the wall of one valley 92a and exceeds its top, the first cam member 90 is pushed by the elastic member 120 so that the hill 104a is different from the other valley ( 92b) as it slides down, the phase of the folder 350 is only fully open and fully closed.

Further, a cavity 108 is formed inside the camshaft 106 in the center of the disc 102. The cavity 108 is utilized as an assembly space when the hinge device 200 is mounted to some application object such as a folding cellular phone 300, for example. In order to mount the hinge device 200 to the mobile phone 300, the cam shaft 106 should be inserted into the insertion groove 312 of the side hinge arm 310b of the mobile phone 300, for this purpose, the second cam member 100 Must be retracted into the housing 110 (the first cam member 100 is also retracted and the elastic member 120 is compressed), in which case the cavity 108 remains in spite of the retraction of the second cam member 100. And a free space so as not to hit the output shaft 50 of the reduction gear unit 80.

The length A from the bottom surface 116 of the housing 110 to the top surface of the cam shaft 106 is the distance B between the top surface of the output shaft 50 and the bottom surface of the cavity 108, and the clutching member 130. Spacing D between the washer 136 and the snap ring 134, and the spacing C from the bottom of the protrusion 112 of the housing 1100 to the bottom of the hole 114 is preferably at least equal to at least. Do.

Next, the housing 110 provides a cylindrical receiving space 119 defined by the bottom 116 in which the through hole is formed so that the side wall 118 and the cam shaft 106 can be exposed. In the cylindrical receiving space 119, the output shaft of the second cam member 100, the first cam member 90, the reduction gear unit 80 and in particular the elastic member 120 and the reduction gear unit 80 surrounding the outer circumference thereof. The clutching member 130 coupled to the 50, and a part of the motor 10 are sequentially received. The housing 110 is directly coupled to the motor 10 or indirectly coupled to the motor 10 by being fixed to the engaging portion 72 of the reduction gear unit 80 as shown. The inner wall of the housing 110 is provided with an insertion hole 114 or a concave groove of the convex portion 96. The convex portion 96 is inserted into the hole 114 so that the first cam member 90 and the housing ( 110 is interlocked to allow rotational force transmission to each other. In addition, in response to the side protrusions 105a and 105b of the second cam member 100, a locking jaw 115 that prevents rotation of the first and second protrusions 105a and 105b is formed on the inner surface of the side wall of the housing 110. Is formed.

As shown in the figure, the elastic member 120 preferably uses a coil spring as the elastic member 120. In this case, the coil spring is coupled to surround the reduction gear unit 80, the outer surface of the ring gear 74 and the inner surface of the housing 110, and the engaging portion 72 and the first cam member 90 It is stored in the space defined by. One end of the coil spring is supported by the motor 10 or the coupling portion 72 so as to push the first cam member 90 toward the second cam member 100 by its elastic force. It is preferable to use a coil spring whose diameter is approximately equal to the diameter of the first cam member 90.

The clutching member 130 transmits the rotational force of the motor 10 provided through the output shaft 50 to the second cam member 100 to rotate integrally, on the contrary, the external rotational force is transmitted through the second cam member 100. If provided, the engagement with the second cam member 100 is released to serve to allow free rotation of the second cam member 100. To this end, the clutching member 130 is fastened to surround the output shaft 50 of the reduction gear unit 80 to provide an elastic force, and the second elastic member 132 and the output shaft 50 are sharply cut. And a snap ring 134 fitted to the portion and supported by the elastic force of the second elastic member 132 to be rotatably engaged with the second cam member 100. The snap ring 134 has one or more protrusions 134a and 134b formed on one surface thereof. This protrusion is engaged with the corresponding grooves 109a and 109b of the second cam member 100 as mentioned above. The snap ring 134 rotates integrally with the second cam member 100 or freely rotates along the output shaft 50 depending on whether the operation mode is an automatic mode or a manual mode. Allow. The clutching member 130 may further include a washer 136 fastened to the lower end of the output shaft 50 of the reduction gear unit to support the lower end of the second elastic member 132.

It is preferable to use a coil spring as the second elastic member 132. The elastic force of the coil spring 132 is the second of the snap ring 134 in spite of the load torque applied to the camshaft 106 of the second cam member 100 at the time of the automatic mode operation by the rotational force generated by the motor 10. It is preferable to select one having a size that supports to maintain engagement with the cam member 100.

The assembly of the hinge device is carried out as follows. After the reduction gear unit 80 is fixed to the body of the motor 10 to make a geared motor, the first elastic member 120 is fastened to the reduction gear unit 80, and the washer 136 is attached to the output shaft 50. The second elastic member 132 and the snap ring 134 are sequentially fastened. Meanwhile, the second cam member 100 is inserted into the housing 110 so that the cam shaft 106 is exposed to the outside, and then the first cam member 90 is inserted into the housing 110 to insert the second cam member 100 into the housing 110. Assemble to engage with (100). In this state, the motor 10, the reduction gear unit 80, the first elastic member 120, and the clutching member 130 assembled together are inserted into the housing 110, and then the housing 110 is connected to the connecting portion ( 72) to complete the assembly.

According to the hinge device of the first embodiment having such a configuration, it is possible to rotate the camshaft 106 of the second cam member 100 using the driving of the motor 10 (this is referred to as 'auto mode rotation'). In addition, an external force may be applied to the camshaft 106 of the second cam member 100 in a state in which the motor 10 is not driven, thereby rotating it (called 'manual mode rotation').

Specifically, the automatic mode rotation will be described first. The motor 10 should be provided with drive power. The rotational force of the motor shaft 16 is transmitted to the input end sun gear 30a directly or indirectly through the coupling member 20. As a result, the sun gear 30a is rotated, and its rotational force forces the rotation of the planetary gears 42-1, 42-2, and 42-3 engaged therewith. Since the ring gear 74 is fixed to the motor 10 and restrained from rotating, the planetary gears 42-1, 42-2, and 42-3 ride on the gear tooth 76 of the ring gear 74 to revolve. Done. As a result, the rear end carrier 34a and the sun gear 30b rotate. In FIG. 4, when the sun gear 36a rotates clockwise, the planetary gears 42-1, 42-2, and 42-3 rotate counterclockwise while rotating the gear tooth 76 of the ring gear 74. Rides in a clockwise direction, whereby an input stage carrier 34a rotatably supporting planetary gears 42-1, 42-2, and 42-3 and a second stage sun gear 34b fixed thereto are provided. It turns. In the reduction gear train 60, the rotation speed of the sun gear at the rear end is a predetermined reduction ratio, i.kShip (butkIs a constant). Therefore, the rotation speed of the output shaft 50 of the reduction gear unit 80 is compared with the rotation speed of the motor shaft 16.1 / k ⁿ (Where n represents the number of stages of the reduction gear unit). For example, when the gear ratio of one stage is 5: 1, since the illustrated reduction gear unit 80 includes four gear stages, the reduction gear ratio is 625: 1. By such deceleration, the rotational torque obtained through the output shaft 50 is greatly increased compared to the rotational torque of the motor shaft 16. When the output shaft 50 rotates, the snap ring 134 interlocked with respect to the rotation direction Φ rotates. As a result, the second cam member 100 also meshes with the snap ring 134 to rotate. While the second cam member 100 rotates, the first cam member 90 is pushed by the second cam member 100 and retracted along the reduction gear unit 80, and the hills 92a and 92b have different peaks. When it meets 104b and 104a, it advances again by the 1st elastic member 120, and engages with the 2nd cam member 100. FIG. At this time, the second elastic member 132 pushes the snap ring 134 with its elastic force to support the snap ring 134 in engagement with the second cam member 100 to rotate together. In the rotation by such a mechanism, the first and second protrusions 105a and 105b are caught by the catching jaw 115 to prevent rotation. Therefore, the rotation angle of the second cam member 100 in either the clockwise or counterclockwise direction is limited to within 180 degrees. 5A and 5B show the cases where the phases of the second cam member 100 are 0 degrees and 180 degrees, respectively. This 180 degree rotation range allows the hinge device of this embodiment to be used as the opening and closing means of the folding device. After the rotation is 180 degrees, the motor 10 is overloaded so that the overcurrent is supplied to the motor 10. Overcurrent detection also confirms the completion of the 180-degree rotation. In the case of using a DC motor, in order to change the rotation direction of the motor 10, the polarity of the driving power source may be changed.

The hinge device 200 of the first embodiment also guarantees manual mode rotation of the camshaft 106. While the motor 10 is stationary, when a rotational force is applied to the camshaft 106 from the outside, rotation of the second cam member 100 in the rotational direction Φ is forced. Accordingly, the peaks 104a and 104b of the second cam member 100 exert a force on the side walls of the valleys 92a and 92b of the first cam member 90, and the grooves 109a and 109b also snap the ring 134. The force is applied to the projections 134a and 134b. The force transmitted from the second cam member 100 is composed of a rotational direction (Φ) component and an axial direction (-z) component. Since the convex portion 96 is inserted into the hole 114 of the housing 110 and cannot rotate, the first cam member 90 is retracted along the output shaft 50 by the force in the axial direction (-z). Then, when the hills (92a, 92b) is met with the mountain (104b, 104a) is changed to advance by the first elastic member 120 is engaged with the second cam member 100 is finished 180 degrees rotation. In the case of the snap ring 134, the rotation direction Φ component of the force provided by the second cam member 100 does not overcome the force held by the motor 10 and the reduction gear unit 80. ) Retreats back along the output shaft 50 by the force of the axial (-z) component. Subsequently, when the second cam member 100 rotates to meet the grooves 109b and 109a in which the protrusions 134a and 134b are changed, the snap ring 134 is pushed by the second elastic member 132 to finish the rotation 180 degrees again. Engage with the second cam member 100. The second cam member 100 can rotate 180 degrees in this manner by the rotational force applied to the camshaft 106 from the outside.

In the above, the case in which the camshaft 106 of the second cam member 100 is rotated in a state in which the housing 110 is restrained from being rotated has been described. On the contrary, even if an external rotational force is applied to the housing 110 in a state in which the cam shaft 106 is prevented from rotating, the housing 110 may rotate. In this case, the external rotational force applied to the housing 110 rotates the body of the motor 10, and accordingly, the reduction gear unit 80 interlocked with the motor shaft 16 rotates by the same angle as the motor 10. do. Therefore, the output shaft 50 also rotates to force the rotation of the snap ring 134. The external rotational force applied to the housing 110 also forces the rotation of the first cam member 90. However, since the second cam member 100 is constrained so as not to rotate, the first cam member 90 retreats to overcome the elastic force of the first elastic member 120 and then moves forward again to complete the rotation of 180 degrees. In addition, the snap ring 134 overcomes the elastic force of the second elastic member 132 to retreat and then advances again to complete the rotation of 180 degrees.

When the hinge device 200 of the present invention is mounted on the mobile phone 300, the movement in the manner described above enables the manual mode opening and closing of the folder.

Next, FIGS. 6 to 8 show a configuration of the hinge device 200-1 according to the second embodiment of the present invention. In the hinge device 200-1 of the second embodiment, the ring gear portion 70-1 of the reduction gear unit 80-1 is different from that of the first embodiment. The ring gear part 70 of the first embodiment is configured to be fixedly coupled while the coupling part 72 surrounds the outer circumference of the body of the motor 10, whereas the ring gear part 70-1 of the second embodiment is engaged. The portion 72-1 is stepped up at the end of the ring gear 74 to have a structure in contact with the front portion of the motor 10. It is preferable that the outer diameter of the engaging portion 72-1 does not exceed the outer diameter of the motor 10.

According to this structure, the hinge device 200-1 of the second embodiment has the remaining components except for the motor 10 and the housing 110 and these two components 10 and 110, as shown in FIG. 7. The gear assembly 130 is assembled into a single module, consisting of three independent modules. Since the hinge part 200-1 of the second embodiment does not have a structure in which the coupling part 74-1 covers the body 12 of the motor 10, when the assembly is completed as shown in FIG. 8, the housing ( There is almost no level difference between 110 and motor 10.

9 and 10 illustrate a configuration of the hinge device 200-2 according to the third embodiment of the present invention. Compared with the second embodiment, the feature of the third embodiment is the reduction gear unit surrounded by the second cam member 100, the first cam member 90, and the first elastic member 120 in the housing 110-1. The 80-1 is stored one after another, and in particular, all but not part of the motor 10-1 is stored to constitute a geared motor. One end of the housing 110-1 exposes only the power line 18 to supply driving power to the motor 10-1, and the opposite end exposes only the cam shaft 106 of the second cam member 100. When using a DC motor as the motor 10-1, as shown, a motor core 12-1 composed of a permanent magnet and a coil wound around an iron core, and a commutator piece 17 of the motor core 12-1. ) Can be assembled by purchasing a brush (15) in the form of parts in contact with the reverse direction of the current flowing through the coil.

The hinge devices 200, 200-1, 200-2 according to the embodiments of the present invention as described above are applied to a device having a first member and a second member to hinge the first and second members. In combination it can be used as a device for opening and closing in automatic or manual mode. One example is the case where it is used as a hinge device of a folding cellular phone (see Figs. 11 to 19B).

11 and 12 show a closed state and an open state of the clamshell cellular phone 300 to which the hinge device of the present invention is applied, respectively. The clamshell phone 300 is hingedly coupled to the phone body 340 and the folder 350. For hinge coupling, a central hinge arm 320 is provided at the bottom of the folder 350 to provide a cylindrical accommodation space, and a pair of side hinge arms 310a and 310b are provided at both upper corners of the phone body 340. Stand facing each other at predetermined intervals. The central hinge arm 320 is inserted into the pair of side hinge arms 310a and 310b to be rotatably fastened. One side of the main body 340 or the folder 350 is provided with one or more opening and closing keys 330 for instructing automatic opening and closing of the folder. In addition, the main body 340 is provided with a microphone 344 and an operation key array 342, and the folder 350 is provided with a speaker 354, a display 352, and the like.

13 and 14 are exploded perspective views for explaining a method of mounting the hinge device of the present invention to the clamshell mobile phone 300, Figure 15 is a cutaway perspective view showing a state of mounting the hinge device of the present invention to a clamshell mobile phone to be. Although the drawing illustrates the case where the hinge device 200 of the first embodiment is applied, it is obvious that the hinge devices 200-1 and 200-2 of the other embodiment can be applied to the mobile phone 300.

In the pair of side hinge arms 310a and 310b, one of the hinge arms 310a has a protruding ring 314 opposite to the central hinge arm 320 so as to fit with the hinge arm 310b. Extending toward the inner side of the other hinge arm 310b, the cam shaft 106 of the second cam member 100 is inserted to form an insertion groove 312 made in a shape capable of transmitting rotational force.

The central hinge arm 320 should be interlocked with the hinge device 200 so as to transmit the rotational force. For this purpose, the central hinge arm 320 and the hinge device 200 are interlocked with each other to form a male and male member having a corresponding shape. do. As an example, as shown, the concave groove 322 is formed inward from the right end of the central hinge arm 320 by a predetermined length, and the concave groove 322 is formed on the outer surface of the housing 110 of the hinge device 200. And a protrusion 112 (see FIG. 1) that can be inserted into the. Forming the protrusion 112 on the outer surface of the housing 110 is the same in the other two embodiments.

Under these conditions, the hinge device 200 is inserted into the cylindrical receiving space of the central hinge arm 320 while the protrusion 112 is fitted to be inserted into the recess 322. Then, the center hinge arm 320 is engaged with the protruding ring 314 of the left hinge arm 310a, and then the cam shaft 106 of the second cam member 100 is pushed into the center hinge arm 320. By assembling the insertion groove 312 of the right hinge arm 310b, the cam shaft 106 is assembled to be inserted into the insertion groove 312.

As such, when the hinge device 200 is assembled to the mobile phone 300, the folder 350 is interlocked to allow the rotational force to be transmitted to the housing 110 of the hinge device 200, and the phone main body 340 is second. The camshaft 106 of the cam member 100 is interlocked so as to allow rotational force transmission therebetween. The housing 110 is fixedly coupled to the reduction gear unit 80 and the motor 10, and the clutching member 130, in particular the snap ring 134, is also interlocked with the reduction gear unit 80. Therefore, the interlocking of the folder 350 and the rotational force is possible by the motor 10, the reduction gear unit 80, the clutching member 130 coupled to the first cam member 90, and the phone main body 340. ) And the second cam member 100 are interlocked to allow the rotational force transmission.

Meanwhile, FIGS. 16A and 16B illustrate that the hinge device of the present invention can adequately provide a passage space 370 of the data bus 360 that electrically connects the folder 350 and the phone body 340 of the mobile phone to each other. It is a figure for following. The phone body 340 and the folder 350 of the mobile phone 300 are electrically connected through the data bus 360. The data bus 360 departs from the folder 350 and passes through the central hinge arm 320 and the one side hinge arm 310a to the phone body 340. The data bus 360 is mainly made of a flexible PCB film, since the folder 350 should not be damaged even if it is frequently opened and closed. In the case of the first or second embodiment of the present invention, the rear part of the body 12 of the motor 10 is not covered with the housing 110, so that the inner wall of the central hinge arm 320 and the body 12 of the motor 10 are provided. A space 370 is secured between the rear parts. The data bus 360 extending from the folder 350 is assembled to travel through this space 370 to the left side hinge arm 310a. Such a structure can provide a wider free space, which can contribute to preventing damage to the data bus 360.

Means for driving the motor 10 to mount the hinge device 200, 200-1 or 200-2 to a foldable apparatus such as a mobile phone 300 to open and close the folder 350 in an automatic mode. This is necessary. 17 and 18 illustrate a configuration for driving and controlling a motor.

First, the motor driving means shown in FIG. 17 is also basically used for opening and closing keys 410 for instructing the user to automatically open and close the folder 350, the battery 430 charging the power, and the control signals CW and CCW. In response, the motor driving unit 420 for supplying the charging power of the battery 430 to the motor 10, and when the opening / closing key 330 is turned on, grasps the current position of the folder 350 and opens the folder 350 in response thereto. Alternatively, the control unit 400 provides the control signal to the motor driving unit 420 to be closed. The opening and closing key 410 corresponds to reference numeral 310 in FIG. 11. If the output voltage of the battery 430 is different from the driving voltage of the motor 10, it is necessary to further arrange a regulator 440 between the battery 430 and the motor driver 420 for adjusting the former to a level suitable for the latter. There is.

Depending on whether the control signal of the controller 400 is the control signal CW for forward rotation or the control signal CCW for reverse rotation, the polarity of the driving power supplied by the motor driver 420 to the motor 10 is determined. do. In addition, the control unit 400 stores a predetermined program capable of processing shown in FIGS. 19 to 24 in a nonvolatile memory (not shown) so that the microcontroller or the microcomputer (not shown) of the mobile phone 300 performs the processing according to the program. The battery 430 may be configured to use the battery 430 provided to the mobile phone 300.

The motor driver 420 may be formed in the form of an electronic circuit configured using a resistor, a transistor, and the like. That is, a circuit for forwarding a battery output voltage or a regulator output voltage to the motor 10 in a forward direction and a circuit for walking in reverse direction are respectively configured, and each circuit is connected to a port for a forward rotation control signal CW of the controller 400 and a reverse rotation control. The motor driver 420 may be configured by connecting to the signal CCW port, respectively. According to this configuration, the driving voltage is applied to the motor 10 in either the forward or reverse direction while the control signal CW or CCW which is a square wave is output.

Furthermore, in configuring the motor driving means, if the current position of the folder 350 senses whether it is in a closed state or an open state, and further includes sensing means for providing the information to the controller 400, the automatic opening and closing of the folder 350 can be performed. It can be done efficiently. When the folder 350 is opened or closed in the automatic opening / closing mode, when the folder 350 is completely closed or fully open and cannot be moved anymore, the motor 10 is overloaded, and as a result, the motor 10 is momentarily overcurrent. Supplied. At this time, when the overcurrent is detected, it may be known that the cover is completely closed or opened. However, overcurrent flows even when the folder 350 cannot be moved by an external interference force during opening and closing. Therefore, the method of determining whether the folder 350 is opened or closed based only on the overcurrent detection cannot distinguish the above two cases. Therefore, it is preferable to introduce a separate sensing means for detecting the opening / closing phase of the folder 350.

The sensing means is preferably composed of a closing switch 412a and an opening switch 412b that can determine whether the current phase of the folder 350 is in a closed state or an open state. The sensing means can be configured in various ways such as an electric switch, a magnetic switch or a mechanical switch. For example, in the case of the magnetic switch, it is preferable to provide one magnetic switch for sensing the closed state and the open state of the folder 350, and mount the magnetic switch at an appropriate position of the mobile phone. As another example, one method is to provide a contact point of a push switch (not shown) and a switching electrode for controlling the contact points in the folder 350 and the phone main body 340, respectively. Of course, the hinge apparatuses 200, 200-1, and 200-2 may be provided with a switch for directly determining whether the folder is opened or closed.

According to another configuration example of the motor driving means, according to FIG. 18, an overcurrent detection unit between the battery 430 and the motor driving unit 420 or between the regulator 440 and the motor driving unit 420 when the regulator 440 is employed. Place 450. The overcurrent detector 450 is introduced as a means for controlling the driving time of the motor 10. When the folder 350 is fully opened or closed when the motor 10 is driven to open and close the folder 350, the motor 10 is overloaded so that a much larger amount of current flows into the motor 10 than before. It flows in. The overcurrent detector 450 detects the amount of current supplied from the battery 430 to the motor driver 420 and provides the current to the analog / digital converter 402 of the controller 400. The controller 400 may determine whether the folder 350 is fully opened or closed by checking whether the amount of current flowing through the overcurrent detector 450 exceeds a reference value. When it is confirmed that the folder 350 is completely opened and closed, the controller 400 no longer outputs the control signal CW or CCW. As a result, the supply of driving power to the motor 10 is no longer performed.

19 to 24 are flowcharts for explaining a procedure for automatically opening and closing a folder using a hinge device according to the present invention. A case in which the hinge device 200, 200-1 or 200-2 is mounted on the mobile phone 300 will be described as an example.

In FIG. 19, when the user presses the opening / closing key 330, an ON signal is generated. The controller 400 monitoring the output of the open / close key 330 checks the close switch SW1 412a and the open switch SW2 412b when a signal from the open / close key 330 is generated (S10). . If the close switch SW1 412a and the open switch SW2 412b are on and off, respectively, the open mode is executed because the folder 350 is currently closed (S14 and S16). On the contrary, if the close switch SW1 412a and the open switch SW2 412b are in an off state and an on state, respectively, the folder 350 is in an open state to execute the close mode (S18 and S20). When the closing switch SW1 412a and the opening switch SW2 412b are both in an off state, the folder 350 is in an intermediate state of the current closing and opening, that is, halfway open. In this case, first, a state initialization mode in which the folder 350 is completely opened or closed is executed (S24), and then the process returns to step S12 to perform the open mode (S16) or the close mode (S20).

20 shows an execution procedure of the open mode S16 by the control unit 400. When the program module in the open mode is executed by the controller 400, first, in the controller 400, the maximum driving time Tset and the actual driving time of the motor 10 applied when the folder 350 is opened or closed once. Set Topr to constant values k and 0, respectively (S32). The maximum running time Tset of the motor 10 is the time taken to fully open the folder 350 in the closed state or the time taken to fully close in the open state (which can be obtained through experiment) plus a few seconds of spare time. It is preferable to set to. The maximum driving time Tset of the motor 10 is thus limited in order to prevent the motor 10 from being driven continuously even if there is a malfunction of the switch SW1 or SW2. Next, the controller 400 outputs the forward rotation control signal CW to cause the motor driving unit 420 to supply driving power for enabling forward rotation to the motor 10 (S34). When the driving power is supplied, the forward rotational force of the motor 10 rotates the second cam member 100. Thereby, the folder 350 is opened. At this time, if the user grabs the phone main body 340, the folder 350 rotates, and conversely, if the user grasps the folder 350, the phone main body 340 rotates. The supply of driving power continues until the opening switch SW2 412b is turned on (S36), and the actual driving time Topr of the motor 10 is accumulated periodically (S40). Every cycle, the actual driving time Topr is compared with the preset maximum driving time Tset (S38), and if the opening switch SW2 412b does not turn on despite the former exceeding the latter, it is checked whether an error has occurred (S42). . When the open switch (SW2) 412b is turned on within the maximum driving time Tset, the folder 350 is completely opened, so the supply of driving power to the motor 10 is cut off (S44), and the state waits for the next operation. Do The user can close the folder 350 again in the automatic mode as well as in the manual mode.

21 shows an execution procedure of the close mode S20 by the controller 400. Compared with the open mode S20 of FIG. 20, the control signal provided by the controller 400 to the motor driving unit 420 is the reverse rotation control signal CCW (S52) and the close mode, so the close switch SW1 412a is closed. Only the point (S54) to check whether the ON is the difference is the same as the open mode.

22 and 23 show another example of execution of the open mode S16 and the close mode S20, which are similar to those of FIGS. 20 and 21 in that the threshold current Ith is further introduced as a control variable. different. If disturbances are given when opening or closing the folder 350 (e.g., supplying a drive current to continue to open or close while the folder 350 is fully open or closed, or due to external interference during opening or closing of the folder 350) When the folder 350 is in a state in which it can no longer be opened and closed), the overcurrent flows much larger than the normal driving current. It is preferable to set the threshold current Ith to an appropriate value L between the normal driving current and the overcurrent (S66). While the open switch SW2 412b is not on (S76), the control unit 400 provides the forward rotation control signal CW to the motor driving unit 420 to open the folder 350 (S68) and at the same time the motor driving unit ( The motor driving current Iopr flowing in 420 is read from the overcurrent detecting unit 450 (S70) and checked whether its magnitude exceeds the threshold current Ith (S72). If an overcurrent is detected while the open switch SW2 412b is not on, the folder 350 may be viewed as a state where external interference is applied to the folder 350 while the folder 350 is not yet fully opened. In this case, the retry mode shown in FIG. 24 is executed (S74). While repeating this execution periodically, the actual driving time Topr of the motor 10 is accumulated (S80), and it is checked whether the value exceeds a preset maximum driving time Tset (S78). If the actual drive time Topr exceeds the maximum drive time Tset in the state that the open switch SW2 412b is turned off, it is not a normal state and thus it is checked whether an error occurs (S82). When the opening switch SW2 412b is turned on through the above process, the folder 350 is normally opened, and thus the supply of the driving power to the motor 10 is stopped (S84). Wait for opening and closing of the folder 350 (S86).

23 except for that the driving power is supplied to drive the motor 10 in the closing direction (S88) and the closing switch SW1 412a is checked to determine whether the driving of the motor is terminated. It is the same as the execution procedure of the open mode of FIG.

FIG. 24 shows a processing procedure when an external interference force is applied to the folder 350 while the folder 350 is opened and closed. When it is detected that the external disturbance force interferes with opening and closing of the folder 350, the control unit 400 turns off both the control signals CW and CCW for a predetermined time (S110, S112), and then again the motor (according to the same driving mode as before). 10, the driving power is controlled to be supplied (S114). While the driving power is supplied to the motor 10, the motor driving current Iopr is read from the overcurrent detecting unit 450 (S116), and the magnitude thereof is compared with the threshold current Ith (S118). As a result of the comparison, when the motor driving current Iopr is smaller than the threshold current Ith, the external interference force can be seen as being removed, and the flow returns to step S76 of FIG. 22 or step S96 of FIG. 23. As a result of the comparison, when the motor driving current Iopr is greater than the threshold current Ith, the overcurrent is still supplied to the motor 10, that is, the external interference force is still present, and thus the number of retries RN is increased by 1 (S122). Repeat the same process. Since the above retries cannot be repeated indefinitely, if the number of retries RN exceeds a predetermined number Z, the driving power supply to the motor 10 is completely stopped (S126), and waits for manual opening and closing by the user ( S128).

In general, in order to open and close the folder 350 automatically, the following two things should be determined in relation to the driving of the motor 10. The first is the rotational direction of the motor 10, the second is the drive time of the motor 10. As a means for instructing the user to open or close the folder 350, the operation key is not used in a manner of using a single opening / closing key 410, but in a manner of using two keys, that is, an opening key (not shown) and a closing key (not shown). If configured, the rotation direction of the motor 10 may be determined using the signals of these two keys. The time for driving the motor 10 is preferably a method of using the open / close confirmation sensor such as the switches 412a and 412b, but other methods of not using the open / close confirmation sensor may be considered. For example, the minimum time required to rotate the folder 350 from the closed state to the open state or vice versa is extracted and the driving power is supplied to the motor 10 at least for the time when the user opens and closes the instruction. The method of terminating or the method of continuously supplying the driving power to the motor 10 until the overcurrent is detected without setting the driving power supply time in advance may be applied.

On the other hand, the mobile phone 300 equipped with the hinge device (200, 200-1, 200-2) of the present invention, the user may open or close the folder 350 in the manual mode. When the user opens the folder 350 and the phone body 340 with both hands in the closed state, the rotational force applied to the folder 350 is transmitted to the housing 110 through the central hinge shaft 320. Since the housing 110 is integrated with the motor 10, the reduction gear unit 80, the snap ring 134, and the first cam member 90, the force transmitted through the central hinge shaft 320 is finally lost. 1 acts as a force to rotate the cam member 90 and the snap ring 134. On the other hand, the rotational force applied to the phone body 340 is transmitted to the second cam member 100 acts as a force to rotate it. Directions of rotational force applied to the first cam member 90, the snap ring 134, and the second cam member 100 are opposite to each other. When such a force is applied to the first cam member 90, the snap ring 134, and the second cam member 100, the first cam member 90 or the snap ring as described above with respect to the manual mode opening and closing of the hinge device 200. Based on 134, the second cam member 100 is rotated by 180 degrees. This allows the user to manually open the folder 350. Manual closing of the folder 350 may be understood in the same manner, except that the folder 350 is rotated in the opposite direction.

As a result, in the case of manual mode opening and closing, the force applied to the folder 350 and the phone main body 340 causes the first cam member 90 and the snap ring 134 and the second cam member 100 to rotate in opposite directions. While the second cam member 100 is rotated 180 degrees, the first cam member 90 and the snap ring 134 retreat in the axial direction (-z direction) and then move forward, thereby moving the folder ( The phase of 350 is changed from open to closed or from closed to open.

In fact, the angle between the folder 350 and the phone body 340 in a fully open state is smaller than 180 degrees. Therefore, when the folder 350 rotates from the closed position to the open position, the second cam member 100 is rotated at an angle smaller than 180 degrees, so that the end portions of the peaks 104a and 104b of the second cam member 100 are rotated. It is not fully inserted into the valleys 92a and 92b of the first cam member 90 and is about halfway between the inclined walls of the valleys 92a and 92b. At this time, since the first elastic member 120 pushes the first cam member 90, the peaks 104a and 104b are completely pushed into the valleys 92a and 92b. The projections 134a and 134b of the snap ring 134 are also completely pushed into the grooves 109a and 109b by the elastic force of the second elastic member 100.

The hinge device of the present invention is embedded in the hinge arm of a clamshell device such as a clamshell cell phone to enable the clamshell device to be automatically opened and closed by a motor drive, and also to be opened and closed manually by a user. Therefore, the folding device employing the hinge device of the present invention can be convenient to use.

In addition, the hinge device of the present invention is disposed between the first elastic member 120 and the motor 10 and the first cam member 90, in particular, in the case of using the coil spring as the first elastic member 120 and the coil spring and Since the reduction gear unit 80 can be assembled by overlapping, the hinge device can be made much smaller than the conventional structure in which the elastic members 120 are arranged in a line behind the motor 10. Furthermore, the miniaturization of the hinge device can be harmoniously applied to the miniaturization trend of mobile phones.

In the above described the case in which the hinge device (200, 200-1, or 200-2) of the present invention is applied to a clamshell mobile phone as an example, the scope of application is not limited to this, and the two components are hinged to form a collapsible form. Any device that is combined with may be applied. For example, in the flip type mobile phone, the hinge device of the present invention can be applied to the hinge coupling between the flip and the mobile phone body through a slight change. In addition, the application of the hinge device of the present invention is not necessarily limited to the mobile phone, but may be applied to other devices having a folder hingedly coupled to the main body. The present invention is not limited to the above embodiments, various improvements or modifications are possible within the scope of the technical idea of the present invention, it will be appreciated by those skilled in the art that such improvements or modifications also belong to the present invention.

Claims (30)

Rotary power means for providing forward and / or reverse rotational force through the output shaft; A first cam member having the output shaft penetrated to the center thereof and movable in the longitudinal direction of the output shaft and coupled to each other such that rotational force transmission is not made between the output shafts; A second cam member having a camshaft for transmitting rotational force, the second cam member being rotatably engaged with the first cam member; An elastic member supporting the first cam member with an elastic force and pushing toward the second cam member; It is fastened to rotate integrally with the output shaft of the rotational power means and is rotatably engaged with the second cam member. When rotational force is provided from the rotational power means, the second cam member is engaged with the rotational force, and the rotational force is determined. A clutching member which transmits to the two cam members and rotates integrally, and when the rotational force is provided from the second cam member, the engagement with the second cam member is released to allow free rotation of the second cam member; And The second cam member, the first cam member, the clutching member, the elastic member, and the rotational power means in a substantially cylindrical space, wherein the camshaft of the second cam member is exposed to the outside and the rotational power means It is fixedly coupled to the hinge device, characterized in that it comprises a housing which is interlocked with the first cam member so as to allow rotational force to be transmitted to each other. The side of the second cam member is formed with a first projection and a second projection spaced at intervals of 180 degrees, the locking projection to prevent the rotation of the first and second projections on the inner surface of the side wall of the housing Is formed, the hinge device, characterized in that the rotation angle of the second cam member is limited to within 180 degrees by the locking jaw. The hinge device according to claim 1, wherein the elastic member is a first coil spring which is fastened to surround the body of the rotation driving means and pushes the first cam member toward the second cam member with elastic force. The method of claim 1, wherein the clutching member is fastened to surround the output shaft of the reduction gear unit second coil spring to provide an elastic force; And fitted into the chamfered portion of the output shaft and rotatably engaged with the second cam member while being supported by the elastic force of the second coil spring to rotate integrally with the second cam member or to retreat along the output shaft. And a snap ring to allow free rotation of the second cam member. The hinge device of claim 4, wherein the clutching member further comprises a washer fastened to a lower end of the output shaft of the reduction gear unit to support a lower end of the second coil spring. 5. The snap ring of claim 4, wherein the snap ring has one or more protrusions formed on one surface thereof, and the second cam member has a predetermined structure, wherein the cam shaft is integrally fixed to the disc and into the housing of the cam shaft. A cavity is formed in the center of the cam shaft at the center of the disc to ensure the entry of the output shaft upon retreat, and at least one groove is rotatably engaged with the protrusion of the snap ring around the groove of the disc surface, The edge of the disc is a hinge device, characterized in that the bone or acid is formed to engage the first cam member. 5. The method of claim 4, wherein the elastic force of the second coil spring is the second cam member in the snap ring despite the load torque applied to at least the cam shaft of the second cam member in the automatic mode operation by the rotational force of the rotation driving means The hinge device having a size that supports to maintain the engagement with. According to claim 1, wherein the first cam member, the size that can accommodate the clutching member in the state coupled to the output shaft therein and the front end of the rotary power means can be advanced, both ends are open, at one end The hinge device, characterized in that the cylindrical structure, the bone or acid is engaged with the second cam member. The convex portion of the first cam member is further formed, and the inner wall of the housing is further provided with an insertion hole or a concave groove, so that the convex portion is inserted into the hole or the concave groove. And the first cam member and the housing are interlocked to enable rotational force transmission therebetween. According to claim 1, wherein the outer surface of the side wall of the housing is formed with a protrusion, the protrusion is engaged in the concave groove of the hinge arm in which the hinge device is accommodated to interlock the transmission force between the housing and the hinge arm to enable Hinge device, characterized in that. According to claim 1, The rotary power means is a motor for rotating in the forward and / or reverse direction by the drive power source; And a reduction gear unit which is interlocked to allow the rotational force transmission with the shaft of the motor and outputs the rotational force of the torque increased to the output shaft by reducing the rotational force of the motor, wherein the motor and the reduction gear unit are fixed integrally. Hinge device, characterized in that the. The gear reducer of claim 11, wherein the reduction gear unit comprises: a ring gear part formed to have a gear tooth formed on an inner wall of the cylinder and to be integral with the motor and / or the housing; And a gear train housed in the ring gear by cascading a plurality of planetary gears rotatably supported by a carrier and a plurality of reduction gear stages comprising sun gears coupled to the planetary gears, wherein the output shaft includes the gear shaft. The hinge device is fixed to the carrier of the far end of the gear train and is interlocked so as to allow rotational force transmission between the second cam member through the clutching member. 12. The method of claim 11, wherein the rotational force of the motor is transmitted to the reduction gear unit directly or indirectly through a coupling member for connecting the rotational force between the shaft of the motor and the input sun gear of the gear train. Hinge device, characterized in that the. The method of claim 1, wherein the first cam member and the second cam member has a pair of valleys and a pair of peaks formed in a pair shape with each other at the edges of the facing surface, respectively, the flat between the pair of valleys The hinge device, characterized in that the position can be maintained without slipping when the pair of mountains are raised thereon. A foldable apparatus in which a first member and a second member are hinged to be opened and closed, A central hinge arm fixed to one end of the first member and providing a cylindrical accommodation space; A pair of side hinge arms fixed to a predetermined portion on the second member and spaced apart from each other by a predetermined interval so that the central hinge arm can be inserted therebetween; It is interlocked in the central hinge arm and interlocked to allow rotational force transmission therebetween, and interlocked to allow rotational force transmission with at least one of the pair of side hinge arms, thereby allowing the motor to rotate the first member and the second member. Hinge device to enable the automatic mode opening and closing using the rotational force or the manual mode opening and closing by the user's force; And A motor driving means for supplying driving power to the motor built into the hinge device in response to a user's automatic opening and closing instruction; The hinge device, The motor rotating in the forward or reverse direction by a driving power provided by the motor driving means; A reduction gear unit which is interlocked with the shaft of the motor so as to transmit the rotational force, and outputs an increased torque through the output shaft by reducing the rotational force of the motor; A first cam member having the output shaft penetrated to the center thereof and movable in the longitudinal direction of the output shaft and coupled to each other such that rotational force transmission is not made between the output shafts; A second cam member having a camshaft for transmitting rotational force and rotatably engaged with the first cam member; An elastic member supporting the first cam member with an elastic force and pushing toward the second cam member; It is fastened to rotate integrally with the output shaft of the reduction gear unit and is rotatably engaged with the second cam member. When a rotational force is provided from the rotational power means, the second cam member is engaged with the rotational force so as to rotate the rotational force. A clutching member which transmits to the two cam members and rotates integrally, and when the rotational force is provided from the second cam member, the engagement with the second cam member is released to allow free rotation of the second cam member; And The second cam member, the first cam member, the clutching member, the elastic member, and the rotational power means in a substantially cylindrical space, wherein the camshaft of the second cam member is exposed to the outside and the rotational power means And the housing are fixedly coupled, interlocked with the first cam member so as to transmit rotational force to each other, and housed in the central hinge arm to interlock to allow rotational force transfer to each other. And the first member and the second member can be closed in a manual mode by applying a force from the outside or in an automatic mode by using a rotational force obtained by supplying power to the motor. 16. The clamshell device according to claim 15, wherein the clamshell device is a clamshell cell phone wherein the first member is a phone body and the second member is a folder. 16. The apparatus of claim 15, wherein the motor driving means comprises a battery; An opening and closing key for instructing automatic opening and closing of the foldable device; A control unit outputting an opening / closing control signal for enabling forward or reverse rotation of the motor in response to the output of the opening / closing key; And a motor driver for supplying the charging power of the battery to the motor as driving power having a polarity corresponding to the type of the opening / closing control signal in response to the output of the opening / closing control signal. 18. The foldable apparatus according to claim 17, wherein the motor driving means further comprises an overcurrent detecting unit for detecting whether a current flowing into the motor driving unit exceeds a threshold current value for overload detection. 16. The clamshell apparatus according to claim 15, wherein the elastic member is a first coil spring which is fastened to surround the body of the rotation driving means and pushes the first cam member toward the second cam member with elastic force. . 16. The method of claim 15, wherein the elastic force of the elastic member floats the first cam member toward the second cam member such that the first cam member does not retract in the axial direction despite at least a load torque applied to the second cam member. Foldable device, characterized in that having a size that can support. The method of claim 15, wherein the opening and closing by the manual mode, when the external cam is applied to the second cam member, the second cam member is rotated by the rotation each of the first cam member and the closing member By retracting along the output shaft of the reduction gear unit and advancing by the elastic force of the first elastic member and the clutching member itself to re-engage with the second cam member to allow rotation of the second cam member. Done, In the automatic mode, the snap ring rotates by the rotational force of the motor transmitted through the reduction gear unit, and the second cam member is mutually connected to the first cam member by the elastic force of the clutching member. It rotates integrally in the engaged state, and during the rotation of the second cam member, the first cam member is retracted along the output shaft of the reduction gear unit, and then advanced to reengage with the second cam member. Clamshell device. 16. The method of claim 15, wherein the first cam and the second projection is formed on the side of the second cam member spaced at intervals of 180 degrees, the locking projection to prevent the rotation of the first and second projections on the inner surface of the side wall of the housing Is formed, the second cam member is a folding device, characterized in that the rotation angle is limited to within 180 degrees by the locking jaw. 16. The folding device according to claim 15, wherein the elastic member is a first coil spring which is fastened to surround the body of the reduction gear unit and pushes the first cam member toward the second cam member with elastic force. The method of claim 15, wherein the clutching member is fastened to surround the output shaft of the reduction gear unit is coupled to the second coil spring to provide an elastic force; And fitted into the chamfered portion of the output shaft and rotatably engaged with the second cam member while being supported by the elastic force of the second coil spring to rotate integrally with the second cam member or to retreat along the output shaft. And a snap ring to allow free rotation of the second cam member. 25. The clamshell device according to claim 24, wherein the clutching member further comprises a washer fastened to a lower end of the output shaft of the reduction gear unit to support a lower end of the second coil spring. 25. The method of claim 24, wherein the snap ring has one or more protrusions formed on one surface thereof, and the second cam member has a predetermined structure, wherein the cam shaft is integrally fixed to the disc and into the housing of the cam shaft. A cavity is formed in the center of the cam shaft at the center of the disc to ensure the entry of the output shaft upon retreat, and at least one groove is rotatably engaged with the protrusion of the snap ring around the groove of the disc surface, A folding device characterized in that the edge of the disc is formed with a valley or a mountain engaging with the first cam member. 25. The method of claim 24, wherein the elastic force of the second coil spring, the snap ring is the second cam member despite the load torque applied to the cam shaft of the second cam member at least in the automatic mode operation by the rotational force of the rotation driving means A clamshell device having a size that supports to maintain engagement with the. The method of claim 15, wherein the first cam member has a size that can accommodate the clutch member in the state coupled to the output shaft therein and the front end of the rotary power means can be advanced, both ends are open, A folding device, characterized in that the cylindrical structure, the bone or the mountain is engaged with the second cam member. The convex portion is further formed on a side surface of the first cam member, and an insertion hole or a concave groove is further formed in an inner wall of the housing, so that the convex portion is inserted into the hole or concave groove. And the first cam member and the housing are interlocked to allow rotational force transmission therebetween. 16. The method of claim 15, wherein the central hinge arm has a structure in which a recess is formed in a portion of the side wall of the cylindrical receiving space, the housing is inserted into the recess on the outer surface of the side wall is capable of transmitting a rotational force between the central hinge arm Foldable device characterized in that it has a structure formed with a convex portion for interlocking.