JP4681058B2 - Hinge device - Google Patents

Description

The present invention has been made in view of the above circumstances, Oite the lid portion to the hinge equipment for opening and closing operation by rotating in a substantially horizontal direction relative to the body portion, the lid portion by one-touch by hand it is possible to rotate the operation aims to provide Hisage a hinge device capable of crossing the attachment of the lid portion to the long-term stably maintained.

  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. When the mobile phone is used, the operation unit and the display unit are exposed to the outer surface side by opening and closing the lid part by swinging the lid part from the folded state in a hinge device. ing.

  In a foldable mobile phone that covers the operation part of the main body part with such a undulating and rotating lid part, the operation part and the display part are hidden inside with the lid part folded, so the folded state However, since the display part cannot be seen, the use is limited, and it is often inconvenient. Therefore, in recent years, for example, as shown in Patent Document 2, there is also known a mobile phone configured to open and close by rotating the lid portion in a substantially horizontal direction, instead of opening and closing by swinging up and down. Yes. Such a mobile phone that rotates the lid portion in a substantially horizontal direction is provided with a display portion on the outer surface side of the lid portion so that the display portion can be confirmed on the outer surface side even when the lid portion is closed. It has become.

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

  By the way, in the mobile phone shown in Patent Document 1, the hinge device for opening and closing operation by rotating the lid body portion in a substantially horizontal direction with respect to the main body portion is folded in a U shape as shown in FIG. The plate member 100 is attached and fixed to the end portion of the main body 101, the attachment base 105 in which the rotation shaft portion 104 is integrated with the lid body portion 102 is fixed, and the rotation shaft portion 104 is formed at the center of the upper piece of the plate member 100. The lid portion 102 is connected to the main body portion 101 so as to be substantially horizontally rotatable with a rotation shaft portion 104 penetrating through the mounting hole 106 and arranged in the vertical direction as a rotation support shaft. In addition, a ring-shaped plate spring 107 is interposed at the lower end side of the rotation shaft portion 104 and tightened by a retaining connection portion 108 to prevent the rotation shaft portion 104 from being detached, and a protrusion 109 formed on the plate spring 107. Is configured to be in elastic contact with the plate member 100. The mounting hole 106 of the plate member 100 is formed with a pair of locking holes 110 cut out in a U-shape that engages with the protruding portion 109, and the lid body portion 102 is closed and the lid body portion 102 is rotated by 180 °. Thus, the locking hole 110 and the protrusion 109 are engaged with each other in a state where the lid 102 is aligned with the main body 101, and the rotation of the lid 102 is restricted. Accordingly, the lid body portion 102 is held in a state in which the lid body portion 102 is closed and rotated by 180 °.

  As described above, although the mobile phone shown in Patent Document 1 can hold the position of the lid portion 102 in the closed state and rotated by 180 °, the lid portion 102 is aligned with the main body portion 101 in a straight line. In order to hold in the state, it is necessary to manually rotate the lid 102 by 180 °. Similarly, in order to close the lid portion 102 with the lid portion 102 rotated 180 °, it is necessary to continue to manually operate the lid portion 102 to a position where it overlaps the main body portion 101. The lid 102 must be rotated with the main body 101 held with one hand. Therefore, the operation is extremely troublesome when holding a load in one hand. Further, in a state where the engagement between the locking hole 110 formed in the ring-shaped leaf spring 107 and the projection 109 is released, the projection 109 is pressed against the leaf spring 107, so that the lid 102 is rotated. At this time, the protrusion 109 and the leaf spring 107 may rub against each other, and the protrusion 109 may be worn with long-term use. As described above, when the protrusion 109 is worn, the attachment of the lid 102 becomes unstable, and there is a problem that the durability is somewhat inferior such that the lid 102 is loose.

  The present invention has been made in view of the above circumstances, and in a mobile phone using a hinge device for opening and closing the lid by rotating the lid in a substantially horizontal direction with respect to the main body, the lid with one hand. An object of the present invention is to provide a mobile phone using a hinge device that can rotate the part and can stably maintain the attachment of the lid for a long period of time.

Hinge equipment according to claim 1 of the present invention, from the superposed state the lid portion to the main body, pivotally so as to be substantially parallel to pivot the lid portion with respect to the overlapping surface A hinge device, the hinge device having a holder having a support portion fixed to one of the main body portion and the lid portion, and a rotating shaft portion pivotably attached to the support portion. A mounting base fixed to the other of the main body and the lid, an outer cam and an inner cam arranged concentrically on the mounting base, and an outer cam surface and an inner side formed respectively on the outer cam and the inner cam. An annular cam member assembled in the holder so as to be movable up and down so as to engage with the cam surface, and the outer cam for pressing the cam member against the outer cam surface and the inner cam surface of the outer cam and the inner cam. And the inner cam And a coil spring arranged on a concentric circle corresponding to each other, and by pivotally attaching the rotation shaft portion to the support portion, the lid portion is relatively positioned with respect to the main body portion. The first and second inclined cams are formed in a V-shape on the outer cam surface and the inner cam surface of the outer cam and the inner cam so as to be rotatable. The engaging cams are formed at the boundary portions of the cams while maintaining a phase difference of 180 °, and the engaging cams are reverse V-shaped with respect to the biasing direction of the coil spring that biases the cam member. Each of the engaging cams including the third and fourth inclined cams formed on the cam surfaces of the outer cam and the inner cam, respectively. Engaging chevron cam with 180 ° phase difference Then, by engaging the engagement cam of the outer cam and the inner cam and the angle cam, the lid body portion is positioned at a closed position or a deployed position where the lid body portion is overlapped with the main body portion, and By rotating the lid portion from this closed position by 180 °, the first and second slopes of the outer cam and the inner cam are engaged with the mountain cam so that the lid portion and the main body portion are substantially straight. The lid is positioned at the unfolded position, and the lid is rotated counterclockwise or clockwise from the closed position or the unfolded position where the engagement cam and the angle cam are engaged. When the angle cam is moved over the third and fourth inclined cams, a rotational torque in the counter-rotating operation direction is applied to the lid by the coil spring, and the angle cam is moved to the third cam. And over the 4th inclined cam, The lid body is configured to be held in the unfolded position or the closed position by being automatically rotated by being given rotational torque in the rotational operation direction by the first or second inclined cam. It is characterized by that.

The hinge apparatus according to claim 2 of the present invention, Oite hinge equipment according to claim 1, wherein the angle from the center of the third and fourth inclined cam to the third and the outer end of the fourth inclined cam said The cover body is rotated in either the counterclockwise direction or the clockwise direction from the closed position and the unfolded position where the engagement cam and the angle cam are engaged with each other at approximately 25 ° in the radial direction of the outer cam and the inner cam. When the third or fourth inclined cam and the mountain cam are engaged with each other in the angle region up to 25 °, the coil spring gives a rotational torque in the anti-rotation operation direction to the lid body, and 25 ° After the chevron cam is moved away from the third and fourth inclined cams and switched to the first or second inclined cam, a rotational torque in the rotational operation direction is applied to the lid body portion from the closed position to the deployed position or Automatic rotation from unfolded position to closed position Wherein by being configured as.

The hinge apparatus according to claim 3 of the present invention, Oite hinge equipment according to claim 1 or 2, wherein the pivot shaft portion is formed in a hollow shape having a through hole, the main body portion and the lid through the through hole The wiring process is performed so as to route the wiring member to the body part.

The hinge device according to claim 4 of the present invention, Oite hinge equipment according to any one of claims 1 to 3, to fix the positioning pin on the outer periphery of the cam member, the positioning in the holder A long hole for guiding the pin to move up and down is provided.

According to hinge equipment according to the first aspect of the present invention, since a superimposed state the lid portion with respect to the main body, so as to be substantially parallel to pivot the lid portion with respect to the overlapping surface pivotal A hinge device to be worn, comprising: a holder having a support portion fixed to one of the main body portion and the lid portion; and a pivot shaft portion pivotally attached to the support portion. A mounting base fixed to the other of the main body and the lid, an outer cam and an inner cam arranged concentrically on the mounting base, and outer cam surfaces formed on the outer cam and the inner cam, respectively. And an annular cam member assembled in the holder so as to be movable up and down so as to engage with the inner cam surface, and for pressing the cam member against the outer cam surface and the inner cam surface of the outer cam and the inner cam, Outer cam and inner cam And a coil spring arranged on a concentric circle corresponding to each of the above, and by pivotally attaching the rotation shaft portion to the support portion, the lid portion is relatively positioned with respect to the main body portion. The first and second inclined cams are formed in a V-shape on the outer cam surface and the inner cam surface of the outer cam and the inner cam so as to be rotatable. The engaging cams are formed at the boundary portions of the cams while maintaining a phase difference of 180 °, and the engaging cams are reverse V-shaped with respect to the biasing direction of the coil spring that biases the cam member. Each of the engaging cams including the third and fourth inclined cams formed on the cam surfaces of the outer cam and the inner cam, respectively. The engaging angle cam maintains a 180 ° phase difference. The lid body portion is positioned at a closed position or an unfolded position where the lid body portion is overlapped with the main body portion by engagement of the outer cam and the inner cam with the engagement cam and the angle cam. At the same time, by rotating the lid body portion 180 ° from the closed position, the first and second inclinations of the outer cam and the inner cam are engaged with the mountain cam so that the lid body portion and the main body portion are substantially The lid body portion is positioned at a deployment position that is in a straight line, and the lid body portion is rotated in the counterclockwise or clockwise direction from the closed position or the deployment position where the engagement cam and the angle cam are engaged. When the angle cam is rotated, the coil spring applies a rotational torque in the anti-rotation operation direction until the angle cam gets over the third and fourth inclined cams. Overcoming the 3rd and 4th inclined cams Then, the lid body portion is automatically rotated by the first or second inclined cam in the rotational operation direction so that the lid body portion is held in the deployed position or the closed position. Because it is configured in this way, the lid part can be connected to the main body part so as to be rotatable in the horizontal direction, and when the main body part is not operated, the lid part can be superimposed on the main body part for compactness. It becomes. Moreover, in a state where the lid portion is superimposed on the main body portion, the display can be exposed on the surface side of the lid portion, so that the display can always be visually recognized, for example, broadcast reception or Internet Can be used in various ways, such as browsing, expanding the usage and improving functionality. In addition, when operating the main body, the lid with the receiver can be rotated with one hand regardless of whether it is right-handed or left-handed, and at the closed position of the lid or 180 ° rotated position. In the predetermined angle region, the lid portion is given a rotational torque in the reverse direction to the rotational operation direction. For example, even if the lid portion interferes with another member, the lid portion is not prepared. There is no fear of opening. And if it exceeds a predetermined angle area, it can be rotated with one touch to the position where the lid portion is developed 180 ° by the urging member, and can be operated with one hand, so that the operation is very easy.

According to hinge equipment according to claim 2 of the present invention, claims in a mobile phone having 1 hinge device, wherein the third and fourth center from the third and fourth outer end of the inclined cam of the inclined cam Is approximately 25 ° in the radial direction of the outer cam and the inner cam, and either the counterclockwise direction or the clockwise direction of the lid body portion from the closed position and the deployed position where the engagement cam and the angle cam are engaged. When the rotation operation is performed in the direction, a rotational torque in the anti-rotation operation direction is applied to the lid portion by the coil spring by the engagement of the third or fourth inclined cam and the mountain cam in the angle region up to 25 °. At the same time, after the angle cam exceeds 25 ° and is disengaged from the third and fourth inclined cams and switched to the first or second inclined cam, the lid is closed by applying rotational torque in the rotational operation direction. Position to deployment position or deployment position Since it is configured to automatically rotate to the closed position, there is no load on the overlapping part of the mounting base and the holder, and there is no risk that the cover will be loose due to wear. Excellent durability. Furthermore, by forming the outer cam, the inner cam, and the cam member engaged with the outer cam with a phase difference of 180 °, the hinge device can be reduced in size, and the cam member and the cam can be interposed between the mounting base and the holder. Since the hinge device can be unitized by assembling the biasing member for biasing, the assembly workability is excellent. In the closed position of the lid body or the deployed position rotated by 180 °, in the angle region up to 25 °, the lid body portion is opposite to the rotational operation direction by the engagement of the engagement cam and the angle cam. Since the rotational torque in the direction is applied, for example, even if the lid part and another member interfere with each other, there is no possibility that the lid part will open carelessly.

According to hinge equipment according to claim 3 of the present invention, Oite hinge equipment according to claim 1 or 2, wherein the pivot shaft portion is formed in a hollow shape having a through hole, the main body through the through hole Since the wiring member is routed so as to route the wiring member to the cover part and the lid body part, the wiring cord does not get in the way and the wiring process can be performed clearly, and the biting of the wiring cord can also be prevented, The disconnection of the wiring cord can be prevented.

According to hinge equipment according to claim 4 of the present invention, Oite hinge equipment according to any one of claims 1 to 3, to fix the positioning pin on the outer periphery of the cam member, the holder Since the long hole for guiding the positioning pin to move up and down is provided, the cam member can reliably and stably guide the cam member by engaging the positioning pin and the long hole. Operation is stable.

1 is a perspective view of a mobile phone showing an embodiment of the present invention. It is an exploded perspective view of a hinge mechanism same as the above. It is sectional drawing of a hinge mechanism same as the above. It is an expanded view of a cam same as the above. It is a front view which shows operation | movement of the cover part of a mobile telephone same as the above. It is sectional drawing of the hinge mechanism which shows the modification of the rotating shaft part of this invention. It is sectional drawing which shows the conventional horizontal rotation type hinge apparatus.

  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. In this state, the lid 5 is inclined upward with respect to the main body 3 so that it is easy to make a call during use.

  Next, the hinge device 6 of the present embodiment will be described based on the exploded perspective view of FIG. 2, the cross-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, an annular cam member 30 assembled in the holder 10 so as to freely move up and down, An outer coil spring 40 and an inner coil spring 41 as urging members for pressing the cam member 30 on the mounting base 20 against the outer cam surface 52 and the inner cam surface 53 are main components.

  The holder 10 has a bottomed cylindrical storage portion 8, and a mounting hole 9 is formed at the center of the bottom of the storage portion 8, and a flange portion is fixed to the main body 3 on the outer periphery of the storage portion 8. 11 is formed. A pivot shaft 21 protruding downward from the central portion of the mounting base 20 is pivotally attached to the mounting hole 9 formed in the holder 10, and the main body 3 with the pivot shaft 21 as a pivot shaft. On the other hand, the lid 5 is connected to be substantially horizontally rotatable. The rotating shaft portion 21 is formed in a hollow shape having a through hole 22 in the center, and the wiring member 23 is routed 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. Thus, it is possible to perform wiring processing.

  The cam member 30 has a peripheral edge that is slidably guided along the inner peripheral surface of the accommodating portion 8, and a guide hole 31 through which the rotating shaft portion 21 is inserted is formed at the center thereof. The cam member 30 is slidably guided along the accommodating portion 8 formed in the base plate 10 and the rotating shaft portion 21 of the mounting base 20. As described above, the positioning pin 32 is fixed to the outer periphery of the guide hole 31 guided by the holder 10 and the rotating shaft portion 21, and the holder 10 has the long hole 33 that guides the positioning pin 32 so as to be movable up and down. The cam member 30 is positioned in the radial direction with respect to the holder 10 by the engagement between the elongated hole 33 and the positioning pin 32, and the rotation of the housing portion 8 and the mounting base 20 formed in the holder 10 is performed. It is guided to move up and down along the moving shaft portion 21. In addition, annular recesses 34 and 35 are formed concentrically on the lower peripheral edge of the cam member 30 and the lower peripheral edge of the guide hole 31, the outer coil spring 40 in the outer recess 34, and the inner coil spring 41 in the inner recess 35. Are accommodated in a positioning state, and the cam member 30 is pressed against the outer cam surface 52 and the inner cam surface 53 formed on the mounting base 20 by the outer coil spring 40 and the inner coil spring 41. Further, a retaining ring 42 that holds the mounting base 20 with respect to the holder 10 is fixed to the lower end of the rotating shaft portion 21 that protrudes from the holder 10, and between the holder 10 and the mounting base 20, A cylindrical spacer 43 that holds the distance between the holder 10 and the mounting base 20 is interposed.

  Next, the relationship between the cam member 30 and the outer cam surface 52 and the inner cam surface 53 formed on the mounting base 20 will be described with reference to a developed view of the cam in FIG. The mounting base 20 is formed with a double outer cam 50 and an inner cam 51 which are arranged concentrically. The outer cam surface 52 and the inner cam surface 53 are the entire lower ends of the outer cam 50 and the inner cam 51. Yes. In the outer cam surface 52 and the inner cam surface 53, left and right symmetrical first and second inclined cams 54 and 55 are continuous in a V shape, and the first and second inclined cams 54 and 55 are symmetrical in the left and right. An outer engagement cam 65 and an inner engagement cam 66 in which the third and fourth inclined cams 60 and 61 are continuously formed in an inverted V shape are formed. The outer cam surface 52, the inner cam surface 53, the outer engagement cam 65, and the inner engagement cam 66 of the outer cam 50 and the inner cam 51 are formed with a relative phase difference of 180 °.

  In addition, the outer engagement cam 65 and the inner engagement cam 66 have an angle from the center to the outer ends of the third and fourth inclined cams 60 and 61 of approximately 25 ° in the radial direction of the outer cam 50 and the inner cam 51. Is set to On the other hand, the cam member 30 has an outer angle cam 70 and an inner angle cam 71 which are inclined at the same angle as the third and fourth inclined cams 60 and 61 of the outer engagement cam 65 and the inner engagement cam 66 at a relative angle of 180 °. The phase difference is maintained. Note that the angle from the center of the cam member 30 to the outer end thereof is set to approximately 110 ° in the radial direction of the cam member 30.

  As shown by the solid line in FIG. 5A, the mobile phone 1 configured as described above has an outer engagement cam 65 or an inner cam formed on the outer cam 50 and the inner cam 51 when the mobile phone 1 is folded. The engagement cam 66 engages with the outer chevron cam 70 and the inner chevron cam 71 of the cam member 30 (that is, the outer engagement cam 65 is the outer chevron cam 70 and the inner engagement cam 66 is the inner chevron cam 71. To engage). As a specific example, the development view of the cam in FIG. 4 shows a state in which the outer mountain cam 70 of the engaging member 30 is engaged with the outer engaging cam 65 of the outer cam 50. Further, there is no structural problem even if the inner engagement cam 66 of the inner cam 51 is engaged with the inner mountain-shaped cam 71 in a state in which the cellular phone 1 is folded, but for the sake of explanation (when the cellular phone 1 is folded). Hereinafter, an example in which the outer angle cam 70 is engaged with the outer engagement cam 65 of the outer cam 50 will be described.

  The outer engagement cam 65 (inner engagement cam 66) of one outer cam 50 (inner cam 51) is turned into the outer mountain cam 70 (inner mountain cam 71) of the cam member 30 in the closed position where the cellular phone 1 is folded. At the engaged position, this is 0 °. 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 (inner cam 51) formed on the mounting base 20 moves in the radial direction, and the outer mountain cam 70 (inner mountain cam 71) of the cam member 30 moves to the outer engagement cam 65 (inner engagement). It moves from the center of the cam 66) to either the third or fourth inclined cam 60, 61 of the outer engagement cam 65 (inner engagement cam 66). That is, in FIG. 4, when the lid 5 is rotated counterclockwise, the outer mountain cam 70 (inner mountain cam 71) engages with the third inclined cam 60, and when it rotates clockwise, the outer mountain cam 70 70 (inner mountain cam 71) engages with the fourth inclined cam 61. Since the third or fourth inclined cams 60 and 61 are formed in an inverted V shape in the opposite direction to the urging force F of the outer coil spring 40 and the inner coil spring 41, the outer mountain cam 70 (inner mountain type). The outer cam 50 (inner cam 51) is pushed by the cam 71). As a result, in the angle region from 0 ° to 25 ° where the outer chevron cam 70 (inner chevron cam 71) is disengaged from the first engagement cam 65, the lid body part 5 resists the rotational operation force. The urging force that the part 5 returns acts.

  When the lid 5 is rotated by 25 ° or more, the outer chevron cam 70 (inner chevron cam 71) is disengaged from the third or fourth inclined cams 60 and 61, and the outer chevron cam 70 (inner chevron cam). 71) is switched to either the first or second inclined cam 54, 55 of the outer cam 50 (inner cam 51). That is, if the lid 5 is rotated leftward, the outer mountain cam 70 (inner mountain cam 71) is engaged with the second inclined cam 55, and if the lid 5 is rotated rightward, the outer mountain cam 70 is engaged. The cam 70 (inner mountain cam 71) is engaged with the first inclined cam 54. Since the first and second inclined cams 54 and 55 are inclined in a V shape in the same direction with respect to the urging force F of the outer coil spring 40 and the inner coil spring 41, the outer mountain cam 70 (inner mountain cam 71). ) Is disengaged from the outer engagement cam 65 (inner engagement cam 66), the outer mountain cam 70 (inner mountain cam 71) is forced to slide down the first inclined cam 54 or the second inclined cam 55. The lid 5 is urged in the opening direction by the rotational torque associated with the action. The lid 5 is rotated by this urging force, and when the lid 5 is rotated 180 °, a first phase difference of 180 ° with respect to the outer engagement cam 65 (inner engagement cam 66) is formed. And the trough part of the 2nd inclination cams 54 and 55 and the outer mountain-shaped cam 70 (inner mountain-shaped cam 71) formed in the cam member 30 engage (it shows with the dashed-dotted line in FIG. 4). As a result, as shown in FIG. 5 (b), 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. .

  Then, in order to close the lid body portion 5, the lid body portion 5 is closed within an angular range from the deployed position where the lid body portion 5 is rotated 180 ° to the first and second inclined cams 54 and 55. Similarly to the opening operation from the position, the outer mountain spring 40 and the inner coil spring 41 are used to form the outer mountain until the outer mountain cam 70 (inner mountain cam 71) is detached from the first and second inclined cams 54 and 55 formed on the inner cam 51. When the mold cam 70 (inner mountain cam 71) is pushed, a rotational torque in the direction of opening the lid body 5 acts against the rotational operation force to close the lid body part 5, and when it is closed further, the lid body part 5 Is rotated 180 ° by the outer coil spring 40 and the inner coil spring 41, and the outer mountain cam 70 (inner mountain) of the engagement member 30 is again connected to the outer engagement cam 65 (inner engagement cam 66) of the outer cam 50 (inner cam 51). Mold cam 71 ) Are engaged, and 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 operating the main body 3, if the lid 5 is rotated 25 ° or more with a thumb or the like while holding the main body 3 with one hand, the outer coil spring 40 and the inner coil spring 41 expand the lid 5 by 180 °. Since it can be rotated with one touch to the position and can be operated with one hand, the operation is extremely easy. Moreover, in the closed position of the lid body portion 5, the lid body portion 5 is rotated by the engagement between the outer engagement cam 65 (inner engagement cam 66) and the angle cams 70 and 71 in the angle region up to 25 °. Since a rotational torque in the direction opposite to the operation direction is applied, in a state where there is no intention to open, for example, the lid 5 and other members interfere with each other and a force in the opening direction acts on the lid 5. Even if it does, there is no possibility that the cover part 5 will open carelessly.

  In addition, the cam member 30 is slidably guided along the housing portion 8 formed on the holder 10 and the rotating shaft portion 21 of the mounting base 20, and the outer member is formed on the holder 10 by the outer and inner coil springs 40 and 41. The cam 50 and the inner cam 51 are pressed against each other, and the rotation of the lid 5 is controlled by the engagement of the cam member 30, the outer cam 50, and the outer and inner cam surfaces 52, 53 formed on the inner cam 51. Therefore, no load is applied to the overlapping portion of the mounting base 20 and the holder 10, and there is no fear that the cover body portion 5 will be loose due to wear, and the durability is excellent. Furthermore, by forming the outer cam 50, the inner cam 51, and the cam member 30 engaged therewith with a phase difference of 180 °, the hinge device 6 can be reduced in size, and the space between the mounting base 20 and the holder 10 can be reduced. Since the hinge device 6 can be unitized by assembling the cam member 30 and the outer and inner coil springs 40, 41 for biasing the cam member 30, the assembly workability is excellent.

  Further, since the wiring cord 23 connected so as to straddle between the main body portion 32 and the lid portion 5 can be arranged through the through hole 22 of the rotating shaft portion 21 formed in a hollow shape, the wiring cord 23 is obstructive. In addition to being able to carry out a clear wiring process, it is possible to prevent the wiring cord 23 from being bitten and to prevent the wiring cord 23 from being disconnected.

  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 embodiment described above, the position at which the angle of the lid portion is regulated by the shape of the cam may be appropriately selected. Further, in the above-described embodiment, the rotating shaft portion 21 is formed in a hollow shape so as to allow the wiring cord 23 to pass through. However, as shown in FIG. 6, the rotating shaft portion 70 may be solid. Thus, if the rotating shaft part 70 is made solid, the rigidity of the rotating shaft part 70 is improved, and the durability can be further increased. The biasing means that presses against the cam member 30, the outer cam 50, and the inner cam 51 is not limited to the coil spring, and may be appropriately selected.

DESCRIPTION OF SYMBOLS 1 Mobile phone 3 Main-body part 5 Cover part 6 Hinge apparatus 7 Earpiece part 8 Transmission part 9 Mounting hole (support part)
DESCRIPTION OF SYMBOLS 10 Holder 20 Mounting base 21,21a Rotating shaft part 22 Through-hole 23 Wiring member 30 Cam member 31 Guide hole 32 Positioning pin 33 Long hole 40, 41 Coil spring (biasing means)
50 outer cam 51 inner cam 52 outer cam surface 53 inner cam surface 54, 55 first and second inclined cams 60, 61 third and fourth inclined cams 65 outer engaging cam 66 inner engaging cam 70 outer mountain cam 71 Inner mountain cam

Claims (4)

A hinge device pivotally attached so that the lid body portion can be pivoted substantially parallel to the overlapping surface from the state in which the lid body portion is superposed on the main body portion. A holder having a support portion fixed to one of the head portion and the lid portion, and a rotation shaft portion pivotably attached to the support portion, and fixed to the other of the main body portion and the lid portion. The mounting base, an outer cam and an inner cam arranged concentrically on the mounting base, and an outer cam surface and an inner cam surface formed on the outer cam and the inner cam, respectively, are moved up and down in the holder. An annular cam member assembled freely, and this cam member are arranged on concentric circles corresponding to the outer cam and the inner cam in order to press the outer cam surface and the inner cam surface of the outer cam and the inner cam, respectively. Co And a pivot member pivotally attached to the support portion so that the lid body portion can be rotated relative to the main body portion. First and second symmetrical cams are formed in a V shape on the outer cam surface and the inner cam surface of the outer cam and the inner cam, respectively, and are positioned at the boundary between the first and second inclined cams 180 respectively. An engagement cam is formed while maintaining a phase difference of °, and the engagement cam is an inverted V-shaped third and fourth inclination with respect to the biasing direction of the coil spring that biases the cam member. The cam member is provided with a 180 ° cam that engages with each of the engagement cams formed by the third and fourth inclined cams formed on the cam surfaces of the outer cam and the inner cam. A phase difference is maintained, and the outer cam and inner cam By engaging the engagement cam and the angle cam, the lid body portion is positioned at a closed position or a deployed position where the lid body portion is overlapped with the main body portion, and the lid body portion 180 is moved from the closed position. By rotating the outer cam and the inner cam, the first and second inclinations of the outer cam and the chevron-shaped cam engage with each other so that the lid body portion and the main body portion are in a straight line at the deployed position. And when the lid is rotated in the counterclockwise or clockwise direction from the closed position or the unfolded position where the engagement cam and the angle cam are engaged, Until the third and fourth inclined cams are overcome, a rotational torque in the counter-rotating operation direction is applied to the lid portion by the coil spring, and when the mountain-shaped cam gets over the third and fourth inclined cams, The lid portion is formed by the first or second inclined cam. Hinge equipment, characterized by being configured as the lid part is held in the deployed position or the closed position by automatically turning is rotational torque is imparted to the rotational operation direction.   The angle from the center of the third and fourth inclined cams to the outer ends of the third and fourth inclined cams is approximately 25 ° in the radial direction of the outer cam and the inner cam, and the engagement cam and the angle cam are When the lid is rotated in the counterclockwise or clockwise direction from the closed position and the deployed position, the third or fourth inclined cam and the angle cam in the angle region up to 25 ° , The coil spring gives a rotational torque in the anti-rotation operation direction to the lid body portion, and the angle cam deviates from the third and fourth inclined cams beyond 25 °, and the first or second inclined cam. 2. The hinge device according to claim 1, wherein after the switching to the position, a rotational torque in a rotational operation direction is applied to the lid portion so as to automatically rotate from the closed position to the deployed position or from the deployed position to the closed position. . The hinge according to claim 1 or 2, wherein the rotating shaft portion is formed in a hollow shape having a through hole, and a wiring process is performed so as to route a wiring member to the main body portion and the lid body portion through the through hole. equipment. The hinge according to any one of claims 1 to 3, wherein a positioning pin is fixed to an outer periphery of the cam member, and a long hole for guiding the positioning pin to move up and down is provided in the holder. equipment.

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