JP2010164076A - Hinge device and cellular phone using the hinge device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To thin a hinge device as much as possible, and to stabilize the operation of a slide cam liable to become unstable due to the thinning. <P>SOLUTION: When carrying out the rotation operation of a lid body 5, a fixed cam fixed to a lid body 5 side is rotated integrally with the lid body 5, and the slide cam in a holder engaged with the fixed cam is slid vertically. A coil spring energizing the slide cam is disposed in the slide cam, an outer cam, a middle cam, and an inner cam are concentrically disposed in the fixed cam, and each cam of a triple structure is engaged with a mound shape cam formed on the slide cam. Thereby, the hinge device can be thinned for a portion of an attachment space of the coil spring, and the operation of the slide cam is stabilized by widening a contact area of the fixed cam and the slide cam. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mobile phone using a hinge device, in particular, a closed position in which the lid body portion is rotated horizontally and the lid body portion is overlapped with the main body portion, and a deployment position in which the lid body portion is opened by a predetermined angle. The present invention relates to a hinge device that can be positioned and held by the mobile phone and a mobile phone using the hinge device.

  For example, as shown in Patent Document 1 or the like, a conventional foldable mobile phone is provided with an operation unit on which the numeric keys and function keys are arranged on the upper surface side of the lower main body, and is predetermined by operating the keys of the operation unit. A display unit such as a liquid crystal panel is provided on the inner surface side of the upper lid part, and the main body part and the lid part are connected via a hinge device. And, when using the mobile phone, it is configured to expose the operation unit and the display unit to the outer surface side by opening and closing the lid part by swinging the lid part from the state folded in half by the hinge device. As shown in the hinge device and Patent Document 2, there is known a mobile phone hinge device configured to open and close by rotating a lid portion in a substantially horizontal direction. In addition, as shown in Patent Document 3, the present applicant is able to rotate the lid with one touch with one hand in a hinge device for a mobile phone that opens and closes by rotating the lid in a substantially horizontal direction. An outer cam, an inner cam, a mountain cam that engages with these cams, and a coil spring that urges the mountain cam, and the lid body portion is formed by engagement of the outer cam, the inner cam, and the mountain cam. Rotation torque in the counter-rotating operation direction is applied to the lid until it is rotated 25 ° from the closed position, and rotation torque in the rotation operation direction is applied to the lid after it exceeds 25 °, and it automatically rotates to the closed position. A hinge device for a mobile phone configured as described above has been proposed.

Japanese Patent Laid-Open No. 2004-11718 JP 2003-336620 A JP 2004-335138 A

  By the way, in recent years, mobile phones have been thinned from the viewpoints of design, weight reduction, convenience when carrying, etc. In response to such demands for thinning, hinge devices for mobile phones are also desired to be thinner. It is coming. However, as shown in Patent Document 3, in the structure in which the lid portion of the mobile phone is held by the engagement of the cam, there is a compositional restriction when the hinge device is thinned. That is, in the hinge device shown in Patent Document 3, the fixed cam and the movable cam are engaged with each other, and the movable cam is moved in the vertical direction along the fixed cam in conjunction with the rotation of the lid. The sliding direction of the movable cam and the height direction of the hinge device are the same direction. Therefore, when the hinge device is thinned, the distance for sliding and guiding the fixed cam is short, and how to stably slide the cam becomes an important issue in thinning the hinge device. Furthermore, since it is necessary to always press the movable cam against the fixed cam, the hinge device shown in Patent Document 3 has a structure in which the coil spring is disposed below the movable cam, and therefore a space for arranging the coil spring. Therefore, the hinge device cannot be thinned.

  Accordingly, the present invention has been made to solve the above-described problem, and can reduce the thickness of the hinge device as much as possible, stabilize the operation of the cam that slides along the fixed cam, An object of the present invention is to provide a hinge device that can smoothly rotate the mobile phone and a mobile phone using the hinge device.

  A hinge device according to claim 1 of the present invention is a hinge device that rotatably connects a main body portion and a lid body portion, and a holder of the hinge device is attached to one of the main body portion and the lid body portion. On the other side, the attachment base of the hinge device is fixed, and the holder is pivotally supported on a cylindrical portion provided on the attachment base, so that the lid body portion rotates relative to the main body portion. And a plurality of fixed cams formed concentrically with the cylindrical portion on the mounting base, and a slide cam that slides up and down in the holder and presses the slide cam against the fixed cam. Therefore, in the hinge device in which a coil spring is disposed and the lid body portion is held in the closed position and the unfolded position of the lid body portion by engagement of the slide cam and the fixed cam, the total height of the hinge device is 12 m. Characterized in that not more than.

  The hinge device according to claim 2 of the present invention is a hinge device that rotatably connects the main body portion and the lid body portion, and the holder of the hinge device is attached to one of the main body portion and the lid body portion. On the other side, the attachment base of the hinge device is fixed, and the holder is pivotally supported on a cylindrical portion provided on the attachment base, so that the lid body portion rotates relative to the main body portion. And a plurality of fixed cams formed concentrically with the cylindrical portion on the mounting base, and a slide cam that slides up and down in the holder and presses the slide cam against the fixed cam. In a hinge device that arranges a coil spring for holding the lid body portion in a closed position and a deployed position of the lid body portion by engagement of the slide cam and the fixed cam, the inside of the slide cam Characterized in that a Irubane.

  The hinge device according to claim 3 of the present invention is such that the fixed cam has a triple structure in which an outer cam, an intermediate cam, and an inner cam are arranged in multiple, and the slide cam corresponds to each cam of the fixed cam. The first, second, and third chevron cams are formed concentrically while maintaining a phase difference of 120 °, and each cam of the fixed cam has the first, A plurality of engaging cams that engage with the second and third angle cams are formed with a phase difference of 120 °.

  The hinge device according to claim 4 of the present invention is a mobile phone provided with a hinge device, wherein the hinge device is used for a connecting portion between a main body portion and a lid portion of a mobile phone.

  According to the present invention, when the lid portion is rotated, the fixed cam and the slide cam are engaged, and the slide cam slides up and down to control the rotation angle of the lid portion. At this time, the slide cam is biased by a coil spring. By disposing the coil spring on the inside of the slide cam, it is not necessary to provide a space for the coil spring below the slide cam. Therefore, it is possible to reduce the thickness of the slide cam and hence the hinge device. On the other hand, when the coil spring is disposed inside the slide cam, the thinner the slide cam is, the smaller the contact area between the slide cam and the cylindrical portion that guides the slide cam. Although the guide is structurally difficult, the fixed cam that engages with the slide cam is a triple structure of the outer cam, the intermediate cam, and the inner cam. When the slide cam and the fixed cam are engaged, the slide cam and the fixed cam are 3 By adopting a structure that engages with the place, the slide cam can be stably slid even if the slide cam is thinned. Thereby, the height of the hinge device can be reduced to 12 mm or less.

1 is a perspective view of a mobile phone showing an embodiment of the present invention. It is a perspective view of a fixed cam same as the above. FIG. 3A is a front view, and FIG. 3B is a plan view. It is a perspective view of a slide cam same as the above. FIG. 4A is a front view, and FIG. 4B is a plan view. It is a perspective view of a hinge apparatus same as the above. It is sectional drawing of a hinge apparatus same as the above. It is an expanded view of a cam same as the above. It is an operation | movement figure of a cover body part same as the above.

  Embodiments of the present invention will be described based on examples with reference to the drawings. FIG. 1 is a perspective view of a mobile phone to which the present invention is applied. As shown in FIG. 1, the mobile phone 1 includes a main body 3 having a plurality of operation keys 2 and a display 4 such as a liquid crystal panel. It is comprised with the cover body part 5 and the hinge apparatus 6 which connects these main-body parts 3 and the cover body part 5 so that rotation is possible. The main body 3 and the lid 5 are provided with a transmitter 7 and a receiver 8 for a call. The lid 5 is attached to the main body 3 with the display 4 and the receiver 8 facing outward. The lid 5 is connected to the main body 3 by a hinge mechanism 6 so as to be rotatable in a substantially horizontal direction. Note that the attachment surface of the main body 3 that overlaps the lid 5 is inclined, and the lid 5 is horizontally rotated by approximately 180 ° to connect the main body 3 and the lid 5 in a straight line. The lid portion 5 is inclined upward with respect to the main body portion 3 so that it is easy to make a call during use.

  Next, the hinge device 6 of the present embodiment will be described mainly based on the sectional view of FIG. The hinge device 6 includes a holder 10 fixed to the main body 3, a mounting base 20 fixed to the lid body 5, a slide cam 30 assembled in the holder 10 so as to be movable up and down, and the slide Double coil springs 40 and 41 that urge the cam 30 to the fixed cam 15 formed on the mounting base 20 are used as main components.

  The holder 10 has a bottomed cylindrical storage portion 8, and a shaft support hole 9 that rotatably supports the mounting base 20 is formed in the center of the bottom portion of the storage portion 8. A flange portion 11 for fixing the main body portion 3 is formed. A cylindrical portion 21 protruding from the central portion of the mounting base 20 is rotatably connected to the shaft support hole 9 formed in the holder 10, and the main body portion 3 is covered with the cylindrical portion 21 as a rotational support shaft. The body part 5 is connected so as to be substantially horizontally rotatable. The cylindrical portion 21 is formed in a hollow shape having a through hole 22 in the center, and a wiring member (not shown) is provided between the main body portion 3 and the lid portion 5 by passing the wiring member 23 such as a cable through the through hole 22. It is possible to perform wiring processing so as to be routed.

  As shown in FIG. 4, the slide cam 30 has a top plate portion 31 and a peripheral wall portion 32 integrally formed from the periphery of the top plate portion 31, and forms a cap shape as a whole. A guide hole 33 is formed in the center of the portion 31, and the guide hole 33 passes through the cylindrical portion 21 formed in the holder 10, and a positioning pin 34 protruding from the outer peripheral portion of the slide cam 30 is provided in the holder 10. The slide cam 30 is slidably inserted into the long hole 35 to be formed, and the slide cam 30 is held in the holder 10 so as to move up and down, and the slide cam 30 is inserted into the holder 10 by the engagement between the long hole 35 and the positioning pin 34. Is never positioned radially. Further, concentric coil springs 40 and 41 are accommodated inside the peripheral wall portion 32 of the slide cam 30, and the fixed cam 15 is formed on the mounting base 20 by the coil springs 40 and 41. Is pressed. Further, a bearing 42 for pivotally supporting the cylindrical portion 21 protruding from the holder 10 is pivotally supported on the top plate portion 31 of the slide cam 30. The bearing 42 is held against the holder 10 by a retaining ring 42a.

  Next, the relationship between the slide cam 30 and the fixed cam 15 will be described mainly with reference to plan views in FIGS. 3 and 5 and a development view of the fixed cam in FIG. 4. As shown in FIG. 3, the fixed cam 15 has an outer cam 50, an intermediate cam 51, and an inner cam 52 formed concentrically on the mounting base 20, and each of the cams 50, 51, 52 is a symmetric first slope. The cams 54a, 54b, 54c and second inclined cams 55a, 55b, 55c are configured. The first inclined cams 54a, 54b, 54c and the second inclined cams 55a, 55b, 55c are continuous in a V shape with respect to the biasing direction F of the coil springs 40, 41, and the valley portions thereof are engaged with the first engagement cams. Second engaging cams 66a, 65b, 65c having third inclined cams 60a, 60b, 60c and fourth inclined cams 61a, 61b, 61c continuously in an inverted V shape at the peaks. 66b and 66c are formed. The first engagement cams 65a, 65b, 65c and the second engagement cams 66a, 66b, 66c formed on the outer cam 50, the intermediate cam 51, and the inner cam 52 have a relative phase difference of 180 °. The first engagement cams 65a, 65b, 65c and the second engagement cams 66a, 66b, 66c formed on the outer cam 50, the intermediate cam 51, and the inner cam 52 have a phase difference of 120 °. Is formed.

  The angle from the center to the outer end of the third inclined cams 60a to 60c and the fourth inclined cams 61a to 61c constituting the second engagement cams 66a to 66c is set to approximately 43.5 ° in the radial direction. Yes. On the other hand, in the slide cam 30, the first cams 65a, 65b, and 65c and the angle cams 70a, 70b, and 70c that engage with the second engagement cams 66a, 66b, and 66c are relatively 120 ° out of phase. Is formed. In addition, semicircular engagement protrusions 71a, 71b, 71c are formed at the apexes of these angle cams 70a, 70b, 70c, respectively, and the first engagement cams 65a, 65b, 65c and the second engagement cams are formed. Engaging recesses 72a, 72b, and 72c that are positioned at the centers of 66a, 66b, and 66c and fit into the engaging protrusions 71a, 71b, and 71c are formed. In FIG. 6, reference numeral 81 is a stopper plate interposed between the holder 10 and the mounting base 20, 80 is a stopper formed integrally with the slide cam 30 to hold the stopper plate 81, and in FIG. It is a guide groove portion of a wiring member formed in the mounting base 20.

  In the cellular phone 1 configured as described above, when the cellular phone 1 is folded, the second engagement cams 66a, 66b, 66c formed on the outer cam 50, the intermediate cam 51, and the inner cam 52 are formed by the slide cam 30. Are engaged with the angle cams 70a, 70b and 70c. The second engagement cams 66a, 66b, 66c and the angle cams 70a, 70b, 70c are each formed with a phase difference of 120 °. As a specific example, the cam development of FIG. 8 shows a state in which the angle cam 70a of the slide cam 30 is engaged with the second engagement cams 66a, 66b, 66c of the outer cam 50. 51 and the inner cam 52 are also operated in the same manner. Therefore, as a representative example, the outer cam 50 and the mountain cam 70a of the slide cam 30 are engaged with each other, and the intermediate cam 51, the inner cam 52, and the slide cam 30 are connected. The engagement state is omitted and will be described below.

  The second engagement cams 66a (66b, 66c) of the outer cam 50 (intermediate cam 51, inner cam 52) are engaged with the mountain cams 70a (70b, 70c) of the slide cam 30 in the closed position where the cellular phone 1 is folded. It is in the combined position, and this is 0 °. Further, when the second engagement cam 66a (66b, 66c) is engaged with the angle cam 70a (70b, 70c), the engagement protrusion 71a (71b, 71c) of the angle cam 70a is engaged with the second engagement cam 71a. The engaging recesses 72a (72b, 72c) of the cam 66a (66b, 66c) are fitted. When the lid 5 is rotated counterclockwise or clockwise from the closed position, the mounting base 20 fixed to the lid 5 rotates integrally with the lid 5. As a result, the outer cam 50 (intermediate cam 51, inner cam 52) formed on the mounting base 20 moves in the radial direction, and the engagement protrusions 71a (71b, 71c) of the mountain-shaped cam 70a become the first engagement cam 65a. (65b, 65c) is disengaged from the engaging recess 72a (72b, 72c), and the mountain cam 70a (70b, 70c) of the slide cam 30 is moved to the third or fourth inclined cam 60a, 61a (60b, 60c or 61b, 61c). ) That is, in FIG. 8, if the lid 5 is rotated clockwise, the mountain cam 70a (70b, 70c) engages with the third inclined cam 60a (60b, 60c), and if it rotates counterclockwise, the mountain cam 70a (70b, 60c) is engaged. The cam 70a (70b, 70c) is engaged with the fourth inclined cam 61a (61b, 61c). These third or fourth inclined cams 60a, 61a (60b, 60c or 61b, 61c) are formed in an inverted V shape that is in the opposite direction to the urging force F of the coil springs 40, 41. The outer cam 50 (intermediate cam 51, inner cam 52) is pushed by 70a (70b, 70c). As a result, in the angle region from 0 ° to 43.5 ° where the angle cams 70a (70b, 70c) are disengaged from the second engagement cams 66a (66b, 66c), the lid 5 is resistant to the rotational operation force. Then, an urging force for returning the lid portion 5 acts.

  When the lid 5 is rotated by 43.5 ° or more, the mountain cam 70a (70b, 70c) is detached from the third or fourth inclined cam 60a, 61a (60b, 60c or 61b, 61c), and the first Or it switches to either of the 2nd inclination cams 54a and 55a (54b, 54c or 55b, 55c). That is, if the lid 5 is rotated to the right, the mountain cams 70a (70b, 70c) engage with the second inclined cams 55a (55b, 55c), and if the lid 5 is rotated to the left, the peaks The mold cams 70a (70b, 70c) engage with the first inclined cams 54a (54b, 54c). The first or second inclined cams 54a, 55a (54b, 54c or 55b, 55c) are inclined in a V shape in the same direction with respect to the urging force F of the coil springs 40, 41. When (70b, 70c) is disengaged from the third or fourth inclined cams 60a, 61a (60b, 60c or 61b, 61c), the mountain-shaped cam 70a (70b, 70c) is the first or second inclined cam 54a, The force which tries to slide down 55a (54b, 54c or 55b, 55c) acts, and the cover body part 5 is urged | biased in the opening direction by the rotational torque accompanying this. The lid 5 is rotated by this urging force, and when the lid 5 is rotated 180 °, the first engaging cam 66a (66b, 66c) is formed with a phase difference of 180 °. The engagement cams 65a (65b, 65c) are engaged, and the engagement protrusions 71a (71b, 71c) formed at the tip of the mountain cams 70a (70b, 70c) are the first engagement cams 65a (65b, 65c). Is engaged with the engaging recess 72a (72b, 72c). As a result, as shown in FIG. 9B, the unfolded position where the lid 5 is rotated by 180 °, that is, the lid 5 is positioned and held in a state of being aligned with the main body 3. . At this time, the lid 5 is not rotated by 180 ° or more by the stopper plate 81 interposed between the holder 10 and the mounting base 20.

  And, in order to close the lid part 5, within an angle range from the deployed position obtained by rotating the lid part 5 by 180 ° to the first or second inclined cam 54 a, 55 a (54 b, 54 c or 55 b, 55 c). The first or second inclined cams 54a, 55a (54b, 54c or 55b, 54b) formed on the outer cam 50 (intermediate cam 51, inner cam 52) are similar to the above-described operation of opening the lid 5 from the closed position. 55c) until the mountain cams 70a (70b, 70c) are removed, the mountain cams 70a (70b, 70c) are pushed by the coil springs 40, 41, and the lid body portion resists the rotational operation force that closes the lid body portion 5. When the rotational torque in the direction of opening 5 acts and closes further, the lid 5 is rotated 180 ° by the coil springs 40, 41, and the outer cam 50 (intermediate cam 51, inner cam 52) again. The second engaging cam 66a (66b, 66c) is engaged with the angle cam 70a (70b, 70c) of the slide cam 30, and the engagement protrusion 71a formed at the tip of the angle cam 70a (70b, 70c). (71b, 71c) and the engagement recess 71a (71b, 71c) formed in the second engagement cam 66a (66b, 66c) are fitted. Thereby, the lid 5 is positioned and held in the closed position.

  As described above, in the present invention, the lid portion 5 can be connected to the main body portion 3 so as to be rotatable in the horizontal direction, and the lid portion 5 is superposed on the main body portion 3 when the main body portion 3 is not operated. It becomes possible to make it compact. Moreover, since the display 4 is exposed on the surface side of the lid 5 in the state where the lid 5 is superimposed on the main body 3, the display 4 can be visually recognized. Various uses such as browsing the Internet will be possible, the usage will be expanded, and functionality will be improved.

  Further, when the main body 3 is operated, if the main body 3 is held with one hand and the lid 5 is rotated by 43.5 ° or more with a thumb or the like, the lid 5 is extended to 180 ° by the coil springs 40 and 41. Since it can be rotated with one touch and can be operated with one hand, the operation is extremely easy. In addition, in the closed position of the lid body portion 5, in the angle region up to 43.5 °, the lid body portion 5 is given a rotational torque in a direction opposite to the rotational operation direction, so there is no intention to open it. Even if, for example, the lid 5 and other members interfere with each other and a force in the opening direction is applied to the lid 5, the lid 5 may not be opened carelessly.

  Furthermore, in this embodiment, when the lid body portion 5 is rotated, the fixed cam 15 fixed to the lid body portion 5 side rotates integrally with the lid body portion 5 and engages with the fixed cam 15. Although the slide cam 30 in the holder 10 slides up and down, when the hinge device 6 is made as thin as possible, the slide cam 30 in the holder 10 must be made thin. However, since the slide cam 30 is urged by the coil springs 40 and 41, when the coil springs 40 and 41 are arranged below the slide cam 30, the hinge device 6 can be thinned by the arrangement space of the coil springs 40 and 41. Disadvantageous. Therefore, in the present embodiment, the coil springs 40 and 41 are arranged in the slide cam 30, and the hinge device 6 is thinned by the space for mounting the coil springs 40 and 41. On the other hand, when the coil springs 40 and 41 are arranged inside the slide cam 30 that is guided to move up and down along the cylindrical portion 21 of the mounting base 20, the contact area between the inner peripheral surface of the slide cam 30 and the cylindrical portion 21 is small. Narrow. As a result, the slide cam 30 cannot be stably slid and guided when the slide cam 30 and the fixed cam 15 are engaged, and the slide cam 30 is tilted and the slide cam 30 and the fixed cam 15 are engaged. Become unstable. Therefore, the outer cam 50, the intermediate cam 51, and the inner cam 52 are arranged concentrically on the fixed cam 15, and the mountain cams 70a, 70b, 70c that form the triple cams 50, 51, 52 on the slide cam 30 are formed. Since the three cams 70a, 70b, 70c provided at intervals of 120 ° are engaged with the fixed cam 51, the slide cam 30 and the fixed cam 15 are securely connected. The slide cam 30 can be stably slid even if the contact area with the cylindrical portion 21 is reduced by making the slide cam 30 thinner. Thereby, in this embodiment, the height h of the slide cam 30 can be reduced to about 4.7 mm, and the height H of the hinge device 6 can be reduced to about 10.25 mm. Furthermore, since the hinge device 6 can be unitized by assembling the slide cam 30 and the coil springs 40 and 41 for biasing the slide cam 30 between the mounting base 20 and the holder 10, the hinge device 6 can be reduced in size. Excellent assembly workability. Furthermore, the semicircular engagement protrusions 71a, 71b, 71c formed at the apexes of the angle cams 70a, 70b, 70c at the closed position of the lid 5 and the unfolded position where the lid 5 is opened 180 °. Are engaged with the engagement recesses 72a, 72b, 72c formed at the centers of the first engagement cams 65a, 65b, 65c and the centers of the second engagement cams 66a, 66b, 66c, respectively. In the position and the unfolded position, the angle cams 70a, 70b, 70c, the outer cam 50, the intermediate cam 51, and the inner cam 52 can be reliably engaged, and the closed position and unfolded position of the lid 5 are left and right. Therefore, positioning and holding can be performed reliably and stably without rattling.

  Moreover, since the wiring member connected so as to straddle the main body portion 32 and the lid body portion 5 can be arranged through the through hole 22 of the cylindrical portion 21 formed in a hollow shape, the wiring member does not get in the way and is refreshed. In addition, the wiring member can be prevented from being bitten, and the wiring member can be prevented from being disconnected. Furthermore, by drawing the wiring member through the guide groove portion 82 formed in the mounting base 20, the hinge device 6 can be further reduced in thickness by the wiring member.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, an example is shown in which the lid portion is fixed at a position rotated by 180 °. However, the lid portion may be fixed at a position rotated by 90 ° depending on the shape of the cam. What is necessary is just to select suitably to control by a position. Furthermore, although the example which provided the triple cam in the attachment base was shown, more than that may be sufficient.

DESCRIPTION OF SYMBOLS 1 Mobile phone 3 Main-body part 5 Cover part 6 Hinge apparatus 7 Earpiece part 8 Transmission part 10 Holder 20 Mounting base 21 Cylindrical part 30 Cam member 31 Guide hole 40, 41 Coil spring 50 Outer cam 51 Intermediate cam 52 Inner cam 54a, 54b , 54c First inclined cams 55a, 55b, 55c Second inclined cams 60a, 60b, 60c Third inclined cams 61a, 61b, 61c Fourth inclined cams 65a, 65b, 65c First engaging cams 66a, 66b, 66c Second engagement cam 70a, 70b, 70c Angle cam

Claims (4)

  A hinge device that rotatably connects a main body and a lid, wherein a holder of the hinge device is fixed to one of the main body and the lid, and a mounting base of the hinge device is fixed to the other. The lid is pivotally supported on a cylindrical portion provided on the mounting base so that the lid body can be rotated relative to the main body, and multiplexed on the mounting base. The fixed cam is formed concentrically with the cylindrical portion, a slide cam that slides up and down in the holder, and a coil spring is disposed to press the slide cam against the fixed cam. In the hinge device that holds the lid portion in the closed position and the unfolded position of the lid portion by engagement with the fixed cam, the hinge device has an overall height of 12 mm or less. .   A hinge device that rotatably connects a main body and a lid, wherein a holder of the hinge device is fixed to one of the main body and the lid, and a mounting base of the hinge device is fixed to the other. The lid is pivotally supported on a cylindrical portion provided on the mounting base so that the lid body can be rotated relative to the main body, and multiplexed on the mounting base. The fixed cam is formed concentrically with the cylindrical portion, a slide cam that slides up and down in the holder, and a coil spring is disposed to press the slide cam against the fixed cam. In the hinge device that holds the lid in the closed position and the deployed position of the lid by engagement with the fixed cam, the coil spring is disposed inside the slide cam. Nji apparatus.   The fixed cam has a triple structure in which an outer cam, an intermediate cam, and an inner cam are arranged in multiple, and the slide cam has first, second, and third chevron shapes corresponding to the cams of the fixed cam. The cams are formed concentrically while maintaining a phase difference of 120 °, and each cam of the fixed cam is engaged with the first, second, and third angle cams at the closed position and the deployed position. The hinge device according to claim 1, wherein the plurality of engaging cams are formed with a phase difference of 120 °. A mobile phone provided with a hinge device, wherein the hinge device is used in a connecting portion between a main body portion and a lid portion of a mobile phone.

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