KR100473825B1 - Hinge device - Google Patents

Abstract

The radiotelephone has a first unit, a second unit and a third unit having a camera. The hinge device is connected to the first unit so that each of the second and third units can rotate relatively about one axis. The hinge device includes a case, a first rotating member, a linear moving member, an elastic member, a second rotating member, and a supporting member. The case has a stop wall that is generally perpendicular to the axis and is provided with a hole. The first rotating member is rotatable about the axis with respect to the case and is connected with the second unit. The linear member moves linearly in the case along the axis by interaction with the first rotating member. The elastic member presses the linear member toward the first rotating member. The second rotating member is rotatable about an axis with respect to the case. The second rotating member is pressed toward the stop wall of the case to be in contact with the stop wall. The second rotating member is connected with the third unit. The supporting member is positioned between the second rotating member and the elastic member and is pressed by the elastic member.

Description

Hinge device {HINGE DEVICE}

TECHNICAL FIELD The present invention relates to a hinge device, and in particular, an apparatus for use while rotating another unit about one unit as needed, for example, a portable wireless telephone having two case units and a camera. It relates to a hinge device for connecting the units in the.

A portable device such as a portable folding cordless telephone has a keypad with a plurality of buttons and a liquid crystal display. In a folding cordless telephone, a keypad is usually provided in one case unit and a liquid crystal display is provided in the other case unit. When not using the phone, fold the keypad or liquid crystal display inward and extend it when using. The hinge device connects the two units and allows them to unfold and fold smoothly.

On the other hand, wireless telephones are becoming more versatile. In particular, this feature is prominent in the wireless telephone of the next generation standard. For example, a next-generation wireless telephone such as IMT2000 may be equipped with a camera for video calling. As such, portable devices such as cordless telephones require various functions. The various functions are provided by various units.

However, conventional hinge devices usually connect between two units and allow rotational movement between them. With such a hinge device, it is impossible to connect organically so as to fully exhibit the functions of the various devices.

The object of the present invention in view of this point is to provide a hinge device for organically connecting a plurality of units. Specifically, it is to provide a hinge device that connects three units to be relatively rotatable.

Another object of the present invention is to provide hinge shafts that operate independently on both sides, so that one unit (e.g., one case unit of a radiotelephone) is the other two units (e.g., the other of a radiotelephone). It is to provide a hinge device that allows the case unit and the camera unit) to rotate respectively.

According to an aspect of the present invention, in a device provided with a first unit, a second unit, and a third unit, each of the second unit and the third unit may be relatively rotated with respect to the first unit about one axis. A hinge device for connecting the three units to each other, comprising: a case having a stop wall provided with a hole and coupled to the first unit, and capable of relative rotation with the case about the axis; A first rotating member connected to a second unit, a linear moving member linearly moving in the case along the axis by interaction with the first rotating member, and the linear moving member toward the first rotating member An elastic member for pressing and relative rotation with the case around the axis, and is pressed toward the stop wall of the case in contact with the stop wall and through the hole of the stop wall A hinge device including a second rotating member connected to the third unit and a supporting member positioned between the second rotating member and the elastic member and pressed by the elastic member is provided.

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Preferably it further comprises a central shaft, the central shaft is

        The head that hangs on the stop wall,

       Extends along the rotation axis from the head and passes through the hole of the stop wall to pass through the second rotating member, the supporting member, the elastic member, and the linear moving member, and is coupled to the first rotating member. The second rotating member is coupled to rotate together, and has a pillar that is relatively rotatably coupled to the first rotating member. In addition, the front end of the pillar of the central shaft has an enlarged outer diameter and a locking portion having a tapered portion that decreases in diameter toward the front, the first rotating member is provided in a hole extending along the axis line and the rotation axis from the inner wall of the hole. It may have a coupling wall extending toward and provided with a hole smaller than the enlarged outer diameter of the locking portion. It is preferable that the coupling wall is generally truncated.

The support member may include a support plate in contact with the elastic member and a support frame extending from the support plate. It is preferable that the supporting plate is deformed by the pressing of the elastic member so that the support border contacts the stop wall of the case.

A wave washer curved in the circumferential direction may be disposed between the support member and the second rotation member.

In a preferred embodiment, one of the rotary member and the linear moving member is provided with a cam, the other is provided with a cam follower to interact with the cam. The cam has two peaks symmetric about an axis and a valley located between the peaks, the peaks and the valleys being connected to form a cam surface, and the cam follower moves along the cam surface and radially about an axis. It may be provided with a protrusion located to.

According to another aspect of the present invention, in an apparatus provided with a first unit, a second unit, and a third unit, each of the second unit and the third unit may be relatively rotated with respect to the first unit about one axis. A hinge device for connecting the three units to each other, comprising: a case having a stop wall provided with a hole and coupled to the first unit, and capable of relative rotation with the case about the axis; A first rotation member connected to a second unit, and a second rotation member capable of relative rotation with the case about the axis and being pressed toward the stop wall of the case to be in contact with the stop wall and connected to the third unit; , A hinge device including a pressing member for pressing the second rotating member toward the stop wall is provided.

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In a preferred embodiment, the case has a second stop wall located opposite the stop wall, the second stop wall is in contact with a first rotating member, and the pressing member presses the first rotating member. .

In another embodiment of the present invention, in an apparatus provided with a first unit, a second unit, and a third unit, each of the first unit and the third unit may be relatively rotated with respect to the second unit. A hinge device for connecting three units to each other, a case coupled to the first unit, a relative rotation with the case, a first rotation member coupled with the second unit, and the case and the relative rotation It is possible to provide a hinge device including a second rotating member coupled to the third unit.

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According to still another aspect of the present invention, there is provided a wireless telephone having a first unit, a second unit connected to the first unit and rotating, and a third unit including a camera connected to the first unit,

A radiotelephone is provided that includes the hinge unit of the substrate connecting the first unit, the second unit, and the third unit.

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

1A and 1B, the folding portable cordless telephone 10 equipped with a camera includes a first case unit 11 and a second case unit 12. The speaker and the liquid crystal display are built in the first case unit 11. Usually, the second case unit 12 includes a keypad, a microphone, a radio signal processing circuit, and the like. The camera unit 13 is rotatably coupled to the first case unit 11. The camera 13 is located on the axis of rotation of these two units. The hinge device 14 connects the first case unit 11, the second case unit 12, and the camera.

1A and 1B, a mounting hole of the hinge device 14 is provided in one extension portion of the first case unit 11. The hinge device 14 is fitted and fixed to the mounting hole. Since the mounting hole is formed in accordance with the shape of the case 24 of the hinge device described later, the hinge device 14 is fixed to the first case unit 11 so as not to rotate. The mounting hole is also provided in the second case unit 12. This is for easily inserting the hinge device 14, which makes the installation hole slightly larger than the case 24 of the hinge device 14. When the hinge device 10 is assembled to the case units 11 and 12 and the camera 13, the hinge device can be passed through this mounting hole of the second case unit 12.

After the hinge device 14 is inserted and fixed to the first case unit 11 through the installation hole of the second case unit 12, the fixing cap 15 is inserted into the installation hole so that the hinge device 14 does not appear outside. . It is fixed to the first hinge shaft 16 in the first hinge portion of the hinge device 14 of the fixing cap 15, and is also fixed to the second case unit. As a result, the first hinge shaft 16 can rotate together with the second case unit 12.

On the other hand, the camera 13 with the lens 13d is fixed to the second hinge shaft 20a in the second hinge portion of the hinge device 14. The camera 13 has an adjustment knob 13a for easily adjusting the direction. The adjusting knob 13a is fixed to the second hinge shaft.

Referring to Figure 2, the hinge device 14 according to an embodiment of the present invention is a case 24, the rotating friction member 20, the friction support member 22, the elastic member accommodated in the case 24 30, a cam follower 26 and a cam member 28 are provided. The rotary friction member 20 and the support member 22 form a second hinge portion, and the cam follower member 26 and the cam member 28 form a first hinge portion.

Fig. 3 (a) is a side view of the case 24 main body, (b) is a side view of the lid 24a, and (c) is an open side view as the front view of the case main body. 1 to 3, the case 24 is generally rectangular, and four corners are formed of elongated barrels of chamfered form. Three sides of the case 24 consist of flat walls 24b. When the flat wall 24b is fitted into the first case unit 11 of the radiotelephone, it prevents rotation. In addition, as will be described later, it also serves to prevent the support member 22 and the cam member 28 accommodated therein from rotating. The other side of the case 24 is open. Various members are inserted and assembled to this open side. The case 24 has a cover 24a. After inserting various members into the case 24, this cover 24a is covered and fixed. Although not shown in detail, it will be understood by those skilled in the art that the cover 24a may be coupled to the case body by various methods such as a fixing method such as a snap fit. At both ends of the case 24, there are end walls 36a and 36b having shaft holes 34a and 34b formed therein. The case 24 is made of metal (for example, metal such as brass plate). Alternatively, the plastic resin material may be formed by injection molding.

Figure 4 (a) is a left side view of the rotating friction member 20, (b) is a front view, (c) is a right side view. 1, 2 and 4, the rotary friction member 20 is provided with a disc 20a. A square columnar hinge shaft 20b protrudes from one side of the disc 20a. This hinge shaft 20b extends beyond the shaft hole 34a of the case 24. Two friction protrusions 20c protrude from the other side of the original plate 20a. The friction protrusions 20c are generally hemispherical protrusions and are disposed at positions symmetrical about the central axis. In the center, a cylinder 20d extending along the central axis is provided. This cylinder 20d is fitted into the center hole 22a of the supporting member 22 which will be described later. The rotary friction member 20 may be manufactured by injection molding a plastic resin.

5 (a) is a side view of the support member 22, (b) is a longitudinal cross-sectional view of the support member 22. 1, 2, and 5, the support member 22 is a generally rectangular plate shape made of a chamfer so as not to rotate in the case. The center hole 22a is provided in the center. The supporting member 22 may be made of a metal sheet or a sheet of plastic resin.

As shown in Figure 2, the elastic member 30 is a compression coil spring, pushing the support member 22 toward the rotating friction member 20. A friction force is generated between the friction protrusion 20c and the support member 22. At this time, when a force of a predetermined magnitude or more is applied to the knob 13a of the camera 13, the camera 13 rotates. In the stationary state, even if a certain amount of external force is applied by the friction force between the friction protrusion 20c and the support member 22, the camera 13 does not move and maintains the stationary state.

6A is a side view of the supporting member 22 'according to another embodiment, and (b) is a longitudinal cross-sectional view of the supporting member 22'. The supporting member 22 'of FIG. 6 has the same configuration as the supporting member of FIG. 5 except that the groove 22b' into which the friction protrusion 20c is inserted is provided. When the support member 22 'is used, the friction protrusion is fitted into the groove 22b' at a certain position. Thus, the camera 13 remains more stable at that position than at other positions.

7A is a front view of the cam member 28, and (b) is a side view of the cam member 28. As shown in FIG. Referring to Figures 1, 2, and 7, referring to Figure 2, the cam member 28 is fitted inside the case 24 to allow linear movement along the central axis but not to rotate. To this end, a flat wall 28a is provided to match the shape of the case. The cam is provided on the surface facing the cam follower member 26. The cam 64 has a cam surface 66 provided on the side facing the cam follower member. The cam 64 is separated by two opposite peaks 68,69 symmetric about the axis of rotation 99 and the peaks 68,69 and opposite symmetric about the axis of rotation. It has valley parts 70 and 71. The cam surface 66 is composed of the top portions 68 and 69 and the valley portions 70 and 71 and a smooth surface connecting them.

The cam member 28 preferably has a cylindrical boss 76 extending along the center of rotation axis. The cam member 28 is provided with a through hole 77 extending along the rotation axis. The through hole 77 is fitted with a central guide rod 55 formed in the cam follower member 26 to guide relative movement. When the cam member 28 is assembled in the case 24, the cam surface faces the blade 56 of the cam follower member 26.

Fig. 8A is a side view of the cam follower member 26 that rotates, and Fig. 8B is a front view. 1B, 2, and 8, the cam follower member 26 has a disc-shaped support 52 and a hinge shaft 16 extending along the axis of rotation from the center of the support 52. Hinge shaft 16 is generally rectangular.

The central guide bar 55 protrudes and extends from the side opposite to the hinge shaft 16. Next to the center guide bar 55, two cam driven wings 56 are provided. The cam driven blade 56 extends in the rotational axis direction along with the central guide bar 55, and extends to a height lower than the center guide bar 55. The two cam driven wings 56 are arranged to be symmetrical about the axis of rotation of the hinge device 14. The two wings 56 form a cam follower. The cam follower refers to a portion that interacts with the cam described above. The thickness is reduced toward the end of the cam driven wing 56, the end is rounded. Of course, the configuration of the cam follower is not limited to the shape of the wing 56, it may be made of a pillar separated from the center guide bar.

The cam follower member 26 is inserted through the open side of the case 24. The cam follower 26 in the case 24 may rotate about the rotation axis 99. As described above, the hinge shaft 16 of the cam follower member 26 protrudes through the axial hole 34b of the case 24.

1B and 2, the elastic member 30 pushes the support member 22 toward the rotation shaft member 20 and the cam member 28 toward the cam follower 26.

1B and 2, when assembling the hinge device, the rotary friction member 20 and the cam follower 26 are inserted through the open side of the case 24. At this time, each of the hinge shafts 20b and 16 protrudes through the shaft holes 34a and 34b. Thereafter, the supporting member 22 and the cam member 28 are put in such a manner that the rotary friction member 20 and the cam follower member 26 face each other. Finally, the elastic member 30 is compressed to the maximum, and then placed between the support member 22 and the cam member 28. Then, the restoring force of the elastic member 30 pushes the support member 22 toward the rotary friction member 20 and the cam member 28 toward the cam follower 26. Insert each part and cover with a cover (24a) to complete the assembly.

9 (a) shows a side view of the fixing cap 15. Fixing cap 15 has a head (15a) and the body (15b). The torso 15b extending from the head 15a is a shape in which both sides of the cylinder are shaved in a plane. The fixing cap 15 is fixed in the second case unit 12 by this plane 15c. As can be seen from Figure 1, the installation hole of the second case unit 12 is drilled in a shape that fits the body and head of the fixing cap. A coupling hole 15d is provided at the end of the body 15b. The hinge shaft 16 is fitted and fixed to this engaging hole 15d. Therefore, the cam follower member 26, the fixed cap 15, and the second case unit 12 are all combined to rotate as one body.

The cam member, cam follower member, and fixed cap are manufactured by injection molding plastic resin, preferably an engineering plastic resin. Alternatively, the metal material may be produced by a method such as powder metallurgy, forging or die casting.

Hereinafter, the operation of the hinge device 14 of FIG. 2 will be described with reference to FIGS. 1B and 2. FIG. 1B illustrates an unfolded state between the first case unit 11 and the second case unit 12. In the unfolded state, the driven blade 56 of the cam follower member 26 is positioned in the valleys 70 and 71 of the cam member 28. This state is in use.

The camera 13 is operated to send an image while talking in the expanded state. When the direction of the camera 13 is not correct, the rotary knob 13a is turned. Then, the rotating friction member 20 rotates. As described above, when the knob 13a is stopped, the stop state is maintained by the frictional force between the projection 20c and the supporting member 22 and between the rotating friction member and the case.

When the second case unit 12 is folded in the unfolded state, the driven blade 56 of the cam follower member 26 faces the tops 68 and 69 along the cam face 66. At this time, the cam member 28 is pushed back and the spring is compressed. When the driven blade 56 passes through the tops 68 and 69, the driven blade 56 is closed by the cam surface by the restoring force of the elastic member 30. In the final folded state, the driven blade 56 is positioned on the inclined portion of the cam surface.

The cam and the cam type in the cam member and cam follower members described in Korean Patent No. 266516, Korean Patent Application Laid-Open No. 1998-72158, and US Patent No. 6,085,387 filed by the applicant The same configuration as the eastern one can be used. The content described in the specification of the patent or patent application is made part of this specification.

Meanwhile, in the above embodiment, the rotary shaft member 20 and the supporting member 22 are provided at one second hinge portion, and the cam member 28 and the cam follower 26 are provided at the other first hinge portion. As described. Alternatively, however, only the structure consisting of both the rotating shaft member and the supporting member may be used. In addition, both of them may have a structure using a cam member and a cam follower member.

10 to 12, the hinge device 110 according to another embodiment of the present invention has a hinge shaft rotatable independently on both sides. The hinge device 110 includes a rotating member 120, a linear moving member 150, an elastic member 180 made of a coil spring, a central shaft 170, a rotating friction member 220 and a friction support member 230. ). The rotating member 120, the linear moving member 150, the coil spring 180, the rotating friction member 220 and the stop friction support 230 is accommodated inside the case 190, by the central shaft 170 Combined with each other.

10 and 12, the case 190 is made up of a long, generally rectangular tube. The longitudinal center line of the case 190 becomes the rotation axis 100 of the hinge device 110. The case 190 includes an end wall 192 formed at one end and a side wall 198 extending from the end wall 192. The opposite side to the end wall 192 is open. A through hole is provided in the center of the end wall 192 through which the rotation axis 100 passes (see FIG. 5). The central shaft 170, which will be described later, is inserted into the case 190 through the through hole 190a. The corners at which the four side walls 198 meet each other are chamfered. When the four flat side walls are assembled into the case unit of the mobile phone, they serve as keys to prevent the case from rotating. In addition, as will be described later, the linear movement member 150 accommodated therein also serves to prevent the rotation. The case 190 may be formed by injection molding a plastic resin material or may be formed by drawing a metal sheet.

10 to 12, the rotating member 120 includes two disc-shaped bases 121 and a hinge shaft 122 that form a hinge shaft exposed to the outside of the case, and two protrusions protruding to opposite sides of the hinge shaft 122. Cam driven protrusion 140 is provided. The hinge shaft 122 in the form of a square pillar has four side walls 125. The rotating member 120 is provided with a groove 127 which is dug inwardly from the hinge shaft side, is connected to the groove 127 and is formed along the rotation axis 100 and the coupling through hole 129 is provided. As shown in FIG. 12, the groove 127 is provided with an engaging portion 128, which forms a truncated cone-shaped barrel about the rotation axis 100. As shown in FIG. The engaging portion 128 protrudes from the bottom of the groove 127 (or the inner wall of the through hole 129). The coupling portion 128 has an inner diameter similar to the through hole 129 at the bottom of the groove, but becomes narrower toward the end. Although not shown, in another embodiment, the wall forming the coupling portion 128 may be divided into a forked wall by a plurality of radially extending gaps. Splitting into forked walls is intended to make it easy to fit the central shaft.

11 and 12, two cam driven protrusions 140 having the same shape are arranged to be symmetrical about the rotation axis 100. The top 144 of the cam follower 140 is mainly in contact with the cam surface described later. The through hole 129 provided in the rotating member 120 is a circular hole, the central shaft 170 to be described later in detail is fitted to guide the rotational movement of the rotating member 120.

11 and 12, the linear moving member 150 has a sidewall 152, a cam 160 formed on a surface facing the rotating member 120, and a cylindrical boss 169 formed on an opposite side of the cam 160. ). The linear movement member 150 is provided with a through hole 151 passing through the boss 169 from the cam 160 along the rotation axis 100. The through hole 151 is fitted with a central shaft 170 to be described later, the linear movement of the linear member 150 is guided. The side wall 152 provided to form a quadrangular pillar has chamfered corners. When fitted to the case 190, the side wall 152 is fitted to fit inside the case 190, the linear movement is possible along the rotation axis 100 by the action of the side wall of the case 190, but not the rotational movement. do.

11, 14, and 15, the cam 160 has a cam surface 162 provided on the side facing the rotating member 120. The cam 160 has two tops (mountains) 164a and 164b which are symmetric about the rotation axis 100 and two concave grooves 166a which are symmetric about the rotation axis 100. 166b). A relatively gentle slope 165 and a steep slope 651 are provided between the top portion 164a and the valleys 166b and 166a, respectively. In addition, a steep inclined surface 641 is provided between the top 164a and the valley 166b. A generally gentle slope 642 is also provided between the top 164b and the valley 166a.

10 to 12, the central shaft 170 includes a head 179 serving as a hinge shaft outside the case and a pillar connected to the head. The pillar includes a large diameter portion 171, a middle diameter portion 173 extending and connected to the large diameter portion 171, and a small diameter portion 175 attached to an end thereof. In the large diameter portion 171, two planar portions 172 are provided at positions symmetrical with respect to the rotation axis 100. The outer diameter of the cylindrical intermediate diameter portion 173 is slidably fitted into the through hole 129 of the rotating member 120 and the through hole 151 of the linear moving member 150. A locking portion 751 is provided at the end of the small diameter portion 175. The outer diameter of the small diameter portion 175 is a size that can be inserted into the hole of the outermost side of the coupling portion 128 of the rotating member 120. The maximum outer diameter of the locking portion 751 is larger than the small diameter portion 175, larger than the diameter of the hole at the uppermost end of the engaging portion 128, and somewhat larger than the outer diameter of the uppermost end of the engaging portion 128. As a truncated conical shape of the locking portion 751, the tip is tapered so as to be collected as it goes to the end.

11 and 12, the rotating friction member 220 is a disk-shaped one side of the inner surface of the end wall 192 of the case 190. The other side is provided with hemispherical protrusions 222 at positions facing each other in axisymmetry (see Fig. 12). The hole 224 is formed in the center. The hole 224 has an arc portion 224a and a straight portion 224b facing each other in accordance with the large diameter portion 171 of the central shaft 170. Accordingly, the large diameter portion 171 fits snugly into the hole 224 so that the rotary friction member 220 rotates together with the central shaft 170.

Support member 230 has a support plate 232 to provide friction and pressing force. The backing plate 232 has a shape that generally coincides with a cross section of the case 190 by chamfering an edge in a generally quadrangular shape. Therefore, rotation is limited within the case 190. The support plate 232 is provided with a through hole 233 to the extent that the large diameter portion 171 of the central shaft 170 can freely rotate. The protrusion 222 is in contact with the support plate 232. A support rim 234 extends downward from the support plate 232. As shown in FIG. 13, the height h1 of the brace edge 234 is lower than the overall height h2 of the rotary friction member 220. Accordingly, in the state where the force of the elastic member 180 is not applied as shown in FIG. 13, the brace edge 234 does not touch the end stop wall 192 of the case 190. However, in the assembled state as shown in FIG. 12, the force of the spring 180 is applied to the outer portion of the support plate 232, and the support plate 232 is deformed so that the support frame 234 is the end wall 192 of the case 190. ) Is reached. When assembled, the bracing rim 234 remains in contact with the end wall 192 of the case 190 at all times. With this configuration, even if the displacement of the spring 180 is changed by the operation of the rotating member 120 and the linear moving member 150, only the force by the deformation of the support plate 232 is applied to the rotating friction member 220. . As a result, the rotational force capable of rotating the rotating friction member 220 is always of a certain magnitude.

11 and 12, during assembly, the central shaft 170 is fitted such that the locking portion 751 is inserted into the case 190 through the through hole in the center of the end wall 192 of the case 190. The head 179 of the central shaft 170 is externally caught on the end wall 192 of the case 190. This head 179 functions as a hinge shaft, which is later coupled with the camera (see FIG. 1B). First, the rotary friction member 220 is inserted into the case 190, the center hole 224 is fitted to the large diameter portion 171 of the central shaft 170. Then, the supporting member 230 is inserted. Subsequently, the coil spring 180 is inserted into the case 190. In this state, a state as shown in FIG. 13 is maintained. Then, the linear movement member 150 is inserted into the case 190 so that the boss 169 faces the end wall 192 of the case 190, and the boss 169 enters the coil spring 180 and the spring ( 180). At this time, the central shaft 170 passes through the through hole 151 of the linear movement member 150. Finally, the rotating member 20 enters the case 190 and is coupled to the central shaft 170. At this time, the cam follower 140 is inserted into the case 190 to be in contact with the linear member 150. When the rotary member 120 is fitted, the front end portion of the central shaft 170 passes through the through hole 129 of the rotary member 120. The locking portion 751 at the end of the central shaft 170 passes through the inside of the truncated cone-shaped coupling portion 128 of the rotating member 120 and is eventually caught by the end portion of the coupling portion 128. This coupling is achieved by restoring when the engaging portion 128 is slightly opened and the engaging portion 751 passes when the leading portion 751 of the central shaft 170 passes through the inside of the coupling portion 128. As a result, the rotating member 120 is coupled so as not to be separated from the central shaft 170. As such, the hinge device 110 may be easily assembled by strongly pushing the rotation member 120 toward the central shaft 170 or the central shaft 170 toward the rotation member 120. In the assembled state, the coil spring 180 is compressed to push the linear member 150 toward the rotary member 120 and the support member 230 toward the rotary friction member 220.

The hinge device of FIG. 10 connects the first case unit, the second case unit, and the camera similarly to the hinge device shown in FIG. The case 190 is fitted to the second case unit to be coupled. The hinge shaft 122 of the rotating member 120 is coupled to the first case. The generally rectangular head 179 of the central shaft 170 is coupled to the camera.

Referring now to Figures 14 and 15, the operation of the hinge device 110 according to the embodiment will now be described. The state of the hinge device in the state where the second case unit is brought into contact with the first case and the cellular phone is completely folded is shown in FIG. 14A, and the position of the cam follower 140 on the cam surface 162 is shown in FIG. Position A is shown. In this state, the cam follower 140 is positioned on the inclined surface 651 between the top 164a and the valley 166a on the cam surface 162. In this position (A), the cam member 150 pushes the rotating member 120 by the force 180 of the coil spring. At this time, the rotating member 120 is subjected to the rotational force by the coil spring 180 and the inclined surface 651 of the hinge device 110. This rotational force causes the second case unit to be in close contact with the first case unit. As a result, the cellular phone remains stable in the folded state.

In this state, the cam follower 140 reaches the top portion 164a of the cam surface 162 when the cell phone is opened between the case units so as to be unfolded. This is the state of Fig. 14B, and the position of the cam follower is the B position of Fig. 15. If it continues to open, the cam follower 140 passes through the top 164a of the cam surface 162. When the cam follower 140 passes the top 164a of the cam surface 162, the coil spring 180 pushes the cam member 150 toward the rotation member 120, so that the cam follower 140 does not have an external force. It descends along the inclined surface 641 of the cam surface 162 and is inserted into and fixed to the valley 166b. This is the state in Fig. 14C, and the cam follower is in position C in Fig. 15, with the second case unit fully extended. The process of switching from the expanded state to the folded state is to reverse the process, which will be readily understood by those skilled in the art from the above description.

On the other hand, the spring 180 is deformed by pressing the edge of the support member 230, the support plate 232 is deformed, the rotation friction member 220 is strongly pressed by the deformation of the support plate 232. In this state, the rotation friction member 220 rotates when a rotation force of a predetermined magnitude or more is applied. Therefore, to adjust the direction of the camera in the open (or closed) state, the mobile phone is rotated by applying a certain amount of force to the knob connected to the camera. Rotating the knob rotates the central shaft 170 of the hinge device 110 coupled thereto. The rotational friction member 220 is rotated by the rotation of the central shaft 170. When no rotational force is applied due to no force applied to the knob, or when an unexpected small rotational force is applied, the rotary friction member 220 maintains a stationary state by the frictional force.

 16 and 17 show a hinge device 310 according to another embodiment. The hinge device 310 has the same configuration as the hinge device 110 shown in FIGS. 10 to 15 except for the rotation friction member 312, the support member 314, and the wave washer 316. Rotary friction member 312 is in the form of a disc. The rotary friction member 312 has the same configuration as the embodiment shown in FIGS. 10 to 15 except that there is no protrusion.

The supporting member 314 has the same form as the embodiment shown in FIGS. 10 to 15. However, the support plate 318 is not deformed as in the above embodiment. An annular wave washer 316 is fitted between the backing plate 318 and the rotating friction member 312. The wave washer 316 is bent along the circumferential direction, as shown in FIG. The wave washer 316 is pressed by being fitted between the support plate 318 and the rotary friction member 312. Accordingly, the wave washer 316 pushes the rotary friction member 312 toward the end wall of the case 190 while contacting the rotary friction member 312. Although FIG. 17 illustrates the use of one wave washer, two or more wave washers may be used.

Using the hinge device of the present invention, it is possible to rotate each of the parts relative to the other parts between three parts (for example, two case units and a camera) with one hinge device. As in the present invention, by arranging and configuring the hinge members of both different characteristics in the hinge device, it ensures a unique rotation function of the various units that require different rotation characteristics.

Although the present invention has been described with reference to the above embodiments, the present invention is not limited thereto. Those skilled in the art will appreciate that modifications and variations can be made without departing from the spirit and scope of the present invention and that such modifications and variations also fall within the present invention.

1A is a perspective view showing a folding cordless telephone in which two case units and a camera device are connected according to an embodiment of the present invention;

FIG. 1B is a front view showing a connection part of a foldable cordless telephone in FIG.

2 is a cross-sectional view of the hinge device of FIG.

Figure 3 shows a case of the hinge device of Figure 1B.

4 is a view showing a rotating friction member of the hinge device of Figure 1B

5 is a view showing the supporting member of the hinge device of FIG. 1B

Figure 6 shows a support member according to another embodiment that can be used in the hinge device of Figure 1B

7 shows a cam member of the hinge device of FIG. 1B.

Fig. 8 shows the cam follower member of the hinge device of Fig. 1B.

9 shows the fixing cap of FIG. 1B.

Fig. 10 is a perspective view showing a hinge device according to another embodiment which can be used in the folding type cordless telephone of Fig. 1A.

Figure 11 is an exploded perspective view of the hinge device of Figure 10

FIG. 12 is a perspective view of the hinge device of FIG. 10, with some members cut away to reveal the interior thereof; FIG.

FIG. 13 is a cross-sectional view showing a state of the rotating friction member and the supporting member before assembly of the hinge device of FIG.

14A, 14B, and 14C are cross-sectional views showing the operation of the hinge device of FIG.

FIG. 15 is a cross-sectional view showing the positional relationship between a cam and a cam follower of the hinge device of FIG.

16 is a sectional view of a hinge device according to another embodiment of the present invention.

Figure 17 is a perspective view of the wave washer used in the hinge device of Figure 16

Claims (14)

In a device equipped with a first unit, a second unit, and a third unit, each of the second unit and the third unit can be relatively rotated with respect to the first unit about one axis, and the three units Hinges for connecting units together A case having a stop wall provided with a hole and coupled to the first unit; A first rotation member capable of relative rotation with the case about the axis and connected to the second unit; A linear moving member linearly moving in the case along the axis by interaction with the first rotating member; An elastic member for urging the linear moving member toward the first rotating member; A second rotating member capable of relatively rotating with the case about the axis, being pressed toward the stop wall of the case to be in contact with the stop wall and connected to the third unit through the hole of the stop wall; A support member positioned between the second rotating member and the elastic member and pressed by the elastic member; Hinge device that includes. The apparatus of claim 1, further comprising a central shaft, The central shaft is         The head that hangs on the stop wall,        Protrudes from the head and passes along the hole of the stop wall and extends along the rotation axis and passes through the second rotation member, the support member, the elastic member, and the linear movement member, and is coupled to the first rotation member, And a column coupled to the second rotating member so as to rotate together and relatively rotatably coupled to the first rotating member. According to claim 2, The front end of the pillar is provided with a locking portion having an enlarged outer diameter, And the first rotating member has a coupling wall provided in a hole extending along the axis and extending from the inner wall of the hole toward the rotation axis and having a hole smaller than the enlarged outer diameter of the engaging portion. 4. The hinge device of claim 3, wherein the coupling wall is generally truncated. The hinge device according to claim 1 or 2, wherein the support member has a support plate in contact with the elastic member and a support frame extending from the support plate. 6. The hinge device according to claim 5, wherein the support plate is deformed by pressing the elastic member so that the support rim contacts the stop wall of the case. 6. The hinge device according to claim 5, wherein a circumferentially curved wave washer is positioned between the support member and the second rotating member. The hinge device of claim 1, wherein the second rotating member includes one or more protrusions protruding to contact the supporting member toward the supporting member at a position radially spaced from the rotation axis. The hinge device according to claim 1, wherein one of the rotating member and the linear moving member is provided with a cam, and the other is provided with a cam follower for interacting with the cam. 10. The cam of claim 9, wherein the cam has two peaks symmetric about an axis and a valley located between the peaks, the peaks and the valleys being connected to form a cam surface, and the cam follower moves along the cam surface. A hinge device comprising a projection located radially about an axis. In a device equipped with a first unit, a second unit, and a third unit, each of the second unit and the third unit can be relatively rotated with respect to the first unit about one axis, and the three units Hinges for connecting units together A case having a stop wall provided with a hole and coupled to the first unit; A first rotation member capable of relative rotation with the case about the axis and connected to the second unit; A second rotation member capable of relative rotation with the case about the axis, being pressed toward the stop wall of the case to be in contact with the stop wall and connected to the third unit; Pressing member for pressing the second rotating member toward the stop wall Hinge device that includes. The method of claim 11, wherein the case has a second stop wall located opposite the stop wall, the second stop wall is in contact with the first rotating member, the pressing member presses the first rotating member Hinge device, characterized in that. In a device equipped with a first unit, a second unit, and a third unit, each of the first unit and the third unit may be relatively rotated with respect to the second unit, and to connect the three units to each other. As a hinge device, A case coupled to the first unit, A first rotation member capable of relative rotation with the case and coupled with the second unit; A hinge device including a second rotation member capable of relative rotation with the case and coupled to the third unit. A wireless telephone having a first unit, a second unit connected to the first unit to rotate, and a third unit including a camera connected to the first unit, A radiotelephone comprising the hinge device according to any one of claims 1 to 13 which connects the first unit, the second unit, and the third unit.