WO2005008082A1

WO2005008082A1 - Hinge device

Info

Publication number: WO2005008082A1
Application number: PCT/JP2004/010289
Authority: WO
Inventors: Hisamitsu Takagi; Shinichiro Koshikawa; Kei Tsuruoka; Ryo Niimi
Original assignee: Fujitsu Limited; Sugatsune Kogyo Co., Ltd.
Priority date: 2003-07-23
Filing date: 2004-07-20
Publication date: 2005-01-27
Also published as: JP4105993B2; JP2005042752A

Abstract

A hinge device, wherein a movable member (not shown) non-rotatably connected to a second hinge member is disposed on the rotating axes of a first hinge member and the second hinge member rotatably and movably in the rotating axis direction. The movable member is energized to the first hinge member side by a coiled spring (not shown). A pair of erected wall surfaces (11d) and (11d) extending in the rotating axis direction are formed on the opposite face of the first hinge member to the movable member, and an end face cam (41) is formed between the erected wall parts (11d) and (11d). A pair of contact arm parts (42a) converting the energizing force of the coiled spring into a rotating energizing force rotating the movable member by pressing the end face cam (41) are formed on the opposite face of the movable member to the first hinge member. Recessed parts (11e) are formed at the lower parts of the erected wall surfaces (11d). The lower side-face of the recessed parts (11e) is formed as a part of the end face cam (41).

Description

Specification

Hinge device

Technical field

[0001] The present invention not only connects two articles such as a transmitting section and a receiving section of a mobile phone so as to be rotatable, but also allows one article to be relatively rotated with respect to the other article. The present invention relates to a hinge device that can be used.

Background art

Generally, a hinge device of this type includes first and second hinge members rotatably connected to each other, and a rotatable pivotal axis of the first and second hinge members. The movable member is provided so as to be movable in the rotation axis direction, and a biasing means for biasing the movable member toward the first hinge member. On a surface of the first hinge member facing the movable member, a pair of end cams extending circumferentially around the rotation axis are formed, and an upright wall portion extending in the direction of the rotation axis is provided between the end cams. Is formed. On the other hand, a pair of contact portions is formed on the surface of the movable member facing the first hinge member. Each abutting portion is pressed into contact with a pair of end cams by an urging means, and each abutment cooperates with the end cam to convert the urging force of the urging means into a rotational urging force. I do. The movable member is rotated by the rotation urging force. When the movable member is rotated, the contact portion slides down on the end face cam from the start end side to the end side along with the rotation (for example, see Patent Document 1).

Patent Document 1: JP 2001-207721 A

Disclosure of the invention

Problems to be solved by the invention

[0003] In the above-mentioned conventional hinge device, when the contact portion abuts against the upright wall surface, the movable member cannot rotate any further. For this reason, there has been a problem that the rotation range of the second hinge member with respect to the first hinge member must be narrowed, and cannot be made wider than 180 °.

Means for solving the problem

[0004] The present invention has been made to solve the above-described problem. A second hinge member rotatably connected to the first hinge member; and a second hinge member rotatably and pivotably about the rotation axis of the first and second hinge members. A movable member arranged to be movable in the direction of the dynamic axis, and biasing means for biasing the movable member toward the first hinge member; and a biasing means for opposing the first hinge member and the movable member. On the other hand, a plurality of end face cams extending in the circumferential direction around the rotation axis are provided at equal intervals in the circumferential direction about the rotation axis, and the end cams are provided between two end face cams adjacent in the circumferential direction. An upright wall surface extending in the direction of the moving axis is provided, and the other is pressed against the pair of end face cams by the biasing force of the biasing means, and cooperates with the pair of end face cams to reduce the biasing force of the biasing means. Rotating the second hinge member via the movable member. In a hinge device provided with a pair of abutting portions for converting to a rotating urging force to be moved, a concave portion is formed in the upright wall surface, and the concave portion is arranged on an extension of the end surface cam. .

In this case, it is desirable that one side surface of the concave portion forms a part of the end surface cam. It is desirable that the end cam has a length of 180 ° or more in the circumferential direction. The invention's effect

[0005] According to the present invention, the rotation range of the second hinge member with respect to the first hinge member can be widened to, for example, 180 ° or more.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a mobile phone 1 using a hinge device 10 according to the present invention (see FIGS. 2 and 3). This mobile phone 1 has a transmitting unit 2 and a receiving unit 3. The transmitting unit 2 and the receiving unit 3 are connected to be rotatable about a rotation axis L. That is, at the end of the transmitting section 2 on the receiving section 3 side, two connecting cylindrical sections 2a are provided as connecting sections. The two connecting cylinders 2a are provided so that their axes coincide with the rotation axis L, and are disposed at both ends of the transmission section 2 in the direction of the rotation axis L. At the end of the receiving section 3 on the transmitting section 2 side, two connecting shafts 3a are provided as connecting sections. The two connecting shafts 3a are arranged with their axes coinciding with the rotation axis L. Moreover, one connecting shaft portion 3a is disposed almost in contact with an inner end surface of one connecting tubular portion 2a of the two connecting tubular portions 2a. The other connecting shaft portion 3a is disposed substantially in contact with the inner end surface of the other connecting cylindrical portion 2a. Of the two sets of connecting cylinder portions 2a and connecting shaft portions 3a adjacent to each other, one set of connecting cylinder portions 2a and connecting shaft portions 3a arranged on the left side in FIG. It is rotatably connected by a printer 10. The other pair of the connecting cylinder 2a and the connecting shaft 3a are simply rotatably connected by a well-known hinge device (not shown). The transmitting cylinder 2 and the receiving section 3 are rotatably connected about the rotation axis L by the connecting cylinder 2a and the connecting shaft 3a being rotatably connected. In the following, for convenience of explanation, it is assumed that the transmitting section 2 is fixed and the receiving section 3 rotates with respect to the transmitting section 2.

[0007] The receiver 3 is rotatable with respect to the transmitter 2 between a folding position and a talking position.

The folding position is regulated by the front surface 3b of the receiver 3 abutting the front surface 2b of the transmitter 2. The call position is regulated by a stopper (not shown) provided at the end of the receiver 3 on the side of the transmitter 2 abutting against the end of the receiver 3 on the side of the receiver 3. In the first embodiment, as shown in Fig. 1 (B), it is set at a position 160 ° away from the folding position. A stopper for regulating the call position of the receiver 3 is provided at an end of the transmitter 2 on the receiver 3 side, and the stopper is brought into contact with the end of the receiver 3 on the transmitter 2 side to make a call position. May be regulated.

[0008] Next, the operation of the hinge device 10 according to the present invention will be roughly described. First, it is assumed that the earpiece 3 is located at the folding position. In this state, when the operation button 61 of the hinge device 10 is pressed, the receiving section 3 is automatically rotated from the folding position to the talking position by the rotation urging force of the hinge device 10, and is maintained at the talking position. You. The receiver 3 rotated to the talking position is manually rotated from the folding position to the use position side. In this case, the earpiece 3 is turned toward the folding position against the urging force of the hinge device 10 up to a position that is a predetermined angle (10 ° in this embodiment) from the folding position. However, when the receiver 3 is rotated by 10 ° to the front of the folding position, the hinge device 10 urges the receiver 3 to rotate toward the folding position. The receiving portion 3 is turned to the folding position by this turning urging force, and is maintained at the folding position.

[0009] The receiver 3 can also be manually rotated from the folding position to the talking position. Receiving When the talker 3 is manually rotated from the folding position to the talking position, the receiver 3 is moved from the folding position to the talking position from the folding position by a predetermined angle (this embodiment). When the receiver 3 is located at a position separated by 15 °), the receiver 3 is urged by the hinge device 10 in the direction of force from the talking position to the folding position. Therefore, in this angle range of 15 °, the receiver 3 is turned from the folding position to the talking position side against the urging force of the hinge device 10. Of course, in this 15 angle range, when the earpiece 3 can be freely rotated, the earpiece 3 is returned to the folded position by the hinge device 10. The receiver 3 is separated from the folding position by 15 ° toward the call position side, and is separated from the talk position by a predetermined angle (15 ° in this embodiment) toward the folding position side. (Hereinafter, this range is referred to as a stoppable range), when the receiver 3 is turned to the talking position side, the receiver 3 is placed inside the hinge device 10. A frictional resistance (blocking force) is generated to prevent the rotation. Therefore, in this stoppable range, the receiving section 3 is turned to the talking position side against the frictional resistance generated in the hinge device 10. In addition, in the stoppable range, the receiver 3 can be stopped at an arbitrary position by frictional resistance generated in the hinge device 10. When the receiver 3 is rotated by 15 ° to the position in front of the talk position, the receiver 3 is rotated to the talk position by the urging force of the hinge device 10 toward the talk position, and is maintained at the talk position. Is done. When the receiver 3 manually rotated to the talking position is manually rotated to the folding position, the receiver 3 is separated from the talking position by 15 ° toward the folding position. When the reception unit 3 is located between these positions, the receiver 3 is turned toward the folding position against the urging force of the hinge device 10. Therefore, in this angle range, when the earpiece 3 can be freely rotated, the earpiece 3 is returned to the talking position by the rotation urging force of the hinge device 10. When the receiver 3 is located in the stoppable range, the receiver 3 acts inside the hinge device 10 as in the case where the receiver 3 is turned from the folding position to the call position. It is possible to stop at an arbitrary position by the frictional resistance while rotating it by piles on the frictional resistance. In other words, in the stoppable range, the earpiece 3 is turned in either the direction toward the folding position or the direction toward the talking position in the direction of the force, and the frictional resistance acting on the hinge device 10 is prevented. To rotate, and the force is also dependent on the frictional resistance. The receiver 3 can be stopped at any position. When the earpiece 3 reaches 15 ° before the folding position, the earpiece 3 is rotated to the folding position by the urging force of the hinge device 10 toward the folding position, and is maintained at the folding position. Is done.

[0011] Next, a specific configuration of the hinge device 10 having the above-described operation will be described. First, one set of the connection cylinder portion 2a and the connection shaft portion 3a into which the hinge device 10 is incorporated will be described in advance. Then, as shown in FIG. 2 to FIG. 5, the connecting tubular portion 2a is formed as a cylindrical body having both ends opened, and the inside thereof is a first connecting hole 2c. The first connection hole 2c is formed so that its axis coincides with the rotation axis L, and has a large-diameter hole 2d on the inner side (on the connection shaft 3a side) and a small-diameter hole 2e on the outside. ing. A pair of key portions 2f protruding inward are formed at the end of the small-diameter hole portion 2e on the large-diameter hole portion 2d side on the inner peripheral surface. The end face of the key portion 2f on the large-diameter hole portion 2d side and the bottom surface of the large-diameter hole portion 2d form the same plane where the angle formed by the rotation axis L is a right angle, and the plane is in contact. The surface is 2g.

As shown in FIG. 2 to FIG. 4 and FIG. 6, a second connection hole 3c is formed on a surface of the connection shaft 3a facing the connection cylinder 2a. The second connecting hole 3c is formed as a shallow blind hole having an open end at the connecting cylindrical portion 2a side and a closed end at the opposite end. Of course, like the first connection hole 2c, the second connection hole 3c may be formed as a through hole passing through the connection shaft 3a. However, when a through hole is formed, a stopper portion is formed on the inner peripheral surface of the inner peripheral surface to prevent a fixed disk 12 described later from being inserted more than the depth corresponding to the depth of the second connection hole 3c. Is desirable. The second connection hole 3c is formed with its axis coinciding with the rotation axis L. A key portion 3d extending parallel to the rotation axis L is formed on the inner peripheral surface of the second connection hole 3c.

As shown in FIGS. 2 and 3, the hinge device 10 includes a fixed cylinder (first hinge member) 11, a fixed disk (second hinge member) 12, and a hinge shaft 13. As shown in FIGS. 7 and 8, the fixed cylinder 11 has a large-diameter cylinder part 11a and a small-diameter cylinder part lib formed so that their axes are aligned with each other. The large-diameter cylindrical portion 11a is fitted into the large-diameter hole 2d via a cover cylinder 15 described later. In this case, the large-diameter cylindrical portion 11a is inserted into the large-diameter hole portion 2d from the opening on the connecting shaft 3a side, and abuts the contact surface 2g via the cover cylinder 15. Accordingly, the fixed cylinder 11 is prevented from moving outward (toward the second coupling hole 3c toward the first coupling hole 2c) by the contact surface 2g. In the fixed cylinder 11, the hinge device 10 is attached to the mobile phone 1. In the state, it does not substantially move inward. Therefore, the fixed cylinder 11 is practically immovable in the direction of the rotation axis L with respect to the first connection hole 2c. The small-diameter cylindrical portion lib is fitted in the small-diameter hole 2e. A keyway 11c is formed on the outer peripheral surface of the small-diameter cylindrical portion lib, and a key portion 2f is fitted into the keyway 11c. Thereby, the fixed cylinder 11 is non-rotatably connected to the transmitting section 2. Therefore, assuming that the transmitting section 2 is fixed, here, the fixed cylinder 11 is also fixed.

[0014] As shown in Figs. 2 and 3, the fixed disk 12 is removably inserted into the second connection hole 3c. As shown in FIGS. 7 and 13, a keyway 12a is formed on the outer peripheral surface of the fixed disk 12. When the key portion 3d fits into the key groove 12a, the fixed disk 12 is non-rotatably connected to the connecting shaft portion 3a, and is thus non-rotatably connected to the receiver 3. Therefore, the fixed disk 12 rotates integrally with the receiver 3. Therefore, the rotating position of the fixed disk 12 when the transmitter 3 is located at the folding position is also referred to as the folding position, and the fixed disk 12 when the transmitter 3 is located at the talking position. Is also called the talking position. The fixed disk 21 is fitted in the second connection hole 3c so as to be movable in the direction of the rotation axis L, but when the hinge device 10 is incorporated in the connection cylinder portion 2a and the connection shaft portion 3a, the second connection hole 3c is fixed to the second connection hole 3c. The position is fixed so as to abut against the bottom surface of the connection hole 3c, and does not move in the direction of the rotation axis L in the second connection hole 3c. The thickness of the fixed disk 12 is set substantially equal to the depth of the second connection hole 3c, and the end surface of the fixed disk 12 on the side of the connection cylinder 2a faces the connection cylinder 2a of the connection shaft 3a. It is located on almost the same plane as the end face.

[0015] The hinge shaft 13 is arranged so that its axis coincides with the rotation axis L, and penetrates the fixed cylinder 11 and the fixed disk 12. A head 13a is formed at one end (right end in FIGS. 2 and 3) of the hinge shaft 13. The head 13a is non-rotatably fitted into an engagement recess 12b formed on an end surface of the fixed disk 12 facing the bottom surface of the second connection hole 3c. Therefore, the hinge shaft 13 rotates integrally with the fixed disk 12. The hinge shaft 13 is rotatably fitted to the fixed cylinder 11. As a result, the fixed cylinder 11 and the fixed disk 12 are rotatably connected via the hinge shaft 13, and thus the connection cylinder 2 a and the connection shaft 3 a are rotatably connected to each other, and The unit 2 and the receiving unit 3 are rotatably connected. The head 13a of the hinge shaft 13 is engaged with the fixed disk 12 when the hinge device 10 is installed in the first and second connection holes 2c and 3c. It is almost sandwiched between the bottom of the mating recess 12a and the bottom of the engaging hole 3c of the connecting shaft 3a. Therefore, in this embodiment, the hinge shaft 13 behaves integrally with the fixed disk 12. Therefore, the hinge shaft 13 may be formed integrally with the fixed disk 12. Conversely, when the hinge shaft 13 is formed separately from the fixed disk 12 as in this embodiment, as long as the hinge shaft 13 is fitted to the fixed cylinder 11 so as to be movable in the direction of the rotation axis L. Alternatively, the hinge shaft 13 may be non-rotatably fitted to the fixed cylinder 11 and may be rotatably fitted to the fixed disk 12.

A stop ring 14 is provided at the other end of the hinge shaft 13 (the left end in FIGS. 2 and 3). The stop ring 14 prevents the fixed cylinder 11 from leaving the other end of the hinge shaft 13 to the left. As described above, the head 13a prevents the fixed disk 12 from being pulled out to the right by the hinge shaft 13 as described above. Therefore, the fixed cylinder 11 and the fixed disk 12 are prevented from coming off with respect to the hinge shaft 13. As a result, each member disposed between the fixed cylinder 11 and the fixed disk 12, such as a coil spring 22, which will be described later, is also attached to the hinge shaft 13 so as not to come off. Thus, the entire hinge device 10 is unitized.

[0017] As described above, the hinge device 10 is configured so that the receiver 3 can be automatically or manually rotated. Therefore, a configuration for enabling the receiver 3 to be manually rotated will be described first.

A rotating member 21 is rotatably and slidably provided on the outer periphery of the hinge shaft 13 between the fixed cylinder 11 and the fixed disk 12. The rotating member 21 is opposed to and fixed to the fixed disk 12, and is urged toward the fixed disk 12 by a coil spring (urging means) 22. Moreover, the rotating member 21 is non-rotatably connected to the fixed cylinder 11 unless the locking state of the locking means 50 described later is released, and the locking means 50 rotates the earpiece 3 manually. As long as there is no release of the locked state. Therefore, when the transmitting section 3 is manually rotated, the rotating member 21 maintains the stopped state, and the fixed disk 12 rotates with respect to the rotating member 21.

As shown in FIG. 13, a pair of cam recesses 23A and 23B are formed on the surface of the fixed disk 12 facing the rotating member 21. The pair of cam recesses 23A and 23B are arranged 180 ° apart on one circumference centered on the rotation axis L. In other words, the pair around the rotation axis L Are placed in the name. The pair of cam recesses 23A and 23B are formed in the same shape. Therefore, only the cam recess 23A will be described. The cam recess 23A is formed in an oval shape that is long in the circumferential direction. As shown in FIG. 14, the depth of the cam concave portion 23A increases from both ends in the circumferential direction about the rotation axis L to the central portion. However, the depth of the cam recess 23A is deepened at a constant rate except for small portions at both ends and the central portion. In other words, the bottom surface defining the cam recess 23A is formed between one end inclined portion 23a and the other end inclined at a fixed angle between both ends in the circumferential direction around the rotation axis L and the central portion. It has a side inclined portion 23b. The one-end-side inclined portion 23a and the other-end-side inclined portion 23b are inclined in opposite directions, but have the same inclination angle and are set to an angle α. The one-side inclined portion 23a is located on the folding position side with respect to the center of the cam recess 23A, and the other-end inclined portion 23b is located on the talking position side.

As shown in FIG. 12, a pair of spheres 24A and 24B made of a metal or other hard material has a part (projection) on the surface of the rotating member 21 facing the fixed disk 12. It is buried and fixed so as to protrude from the fixed disk 12 side. Instead of the pair of spheres 24A and 24B, a projection having a shape corresponding to the portion of the spheres 24A and 24B projecting from the rotating member 21 may be formed integrally with the rotating member 21. The pair of spheres 24A, 24B is pressed against the surface of the fixed disk 12 facing the rotating member 21 by the biasing force of the coil spring (biasing means) 22 acting on the rotating member 21. The cam recesses 23A and 23B are formed on the surface of the rotating member 21 facing the fixed disk 12, and the spheres 24A and 24B or the protrusions are provided on the surface of the fixed disk 12 facing the rotating member 21. A little.

[0021] The pair of spheres 24A and 24B are arranged 180 ° apart from each other on the same circumference as the cam recesses 23A and 23B. Therefore, the pair of spheres 24A and 24B move in and out of the pair of cam recesses 23A and 23B according to the rotational position of the fixed disk 12, that is, the rotational position of the receiver 3. In this case, when the earpiece 3 is located at the folding position, the center C of the sphere 24A (24B) is in the circumferential direction of the cam recess 23A (23B) as shown by the imaginary line in FIG. At a position separated from the center by a predetermined angle (10 ° in this embodiment) from the talking position side to the folding position side in the direction of the force, the end portions 23a, 23a of the cam recesses 23A (23B) come into contact with each other. ing. As a result, the biasing force of the coil spring 22 is reduced to the one-side inclined portion 23a. Thus, the fixed disk 12 is converted into a rotational urging force for rotationally urging the fixed disk 12 from the talking position side to the folding position side in the direction of the force (the direction of the arrow A in FIG. 14). The front surface 3b of the receiver 3 is abutted against the front surface 2b of the transmitter 2 by the rotational urging force, and the receiver 3 is maintained at the folded position.

[0022] When the receiver 3 positioned at the folding position is manually rotated by a predetermined angle (15 ° in this embodiment) toward the talking position against the rotational urging force of the coil spring 22, The spheres 24A, 24B slide up on the inclined portions 23a, 23a on one end side of the cam recesses 23A, 23B, respectively, and escape from the cam recesses 23A, 23B. As a result, the urging force of the coil spring 22 is not converted into the rotational urging force. In other words, the biasing force of the coil spring 22 is tilted at one end only when the receiver 3 is located within the angular range between the folding position and the position 15 ° away from the folding position toward the call position. The rotation of the fixed disk 12 and the earpiece 3 toward the folding position is converted by the parts 23a, 23a and the spheres 24A, 24B.

[0023] The receiver 3 is manually rotated by more than 15 ° from the folded position toward the talking position side against the rotational urging force of the coil spring 22, and the spheres 24A, 24B are moved from the cam recesses 23A, 23B. Upon escape, the spheres 24A and 24B reach the stoppable range described above. Then, the spheres 24A and 24B are pressed into contact with the surface of the fixed disk 12 facing the rotating member 21 by the urging force of the coil spring 22. One end face of the fixed disk 12 facing the turning member 21 in the stoppable range is a plane orthogonal to the turning axis L. Therefore, within the stoppable range, the urging force of the coil spring 22 is converted into a frictional resistance generated between the spheres 24A, 24B and the fixed disk 12. This frictional resistance acts to prevent the relative rotation between the fixed disk 12 and the rotating member 21, and the magnitude thereof is large enough to stop the transmitting section 3 at an arbitrary position. Is set to Needless to say, the transmitting section 3 can be rotated by applying a rotating force large enough to overcome the frictional resistance.

Note that one end face of the fixed disk 12 facing the rotating member 21 does not necessarily have to be entirely flat, and at least when the fixed disk 12 is rotated with respect to the rotating member 21, , 24B may be formed so that the portions located on the circumference where they come into contact are located at the same position in the direction of the rotation axis L. Further, although the spheres 24A and 24B are fixed to the rotating member 21, they may be rotatably mounted. However, in this case, the rolling friction resistance between the spheres 24A and 24B and the rotating member 21 and the fixed disk 12 should be stopped at an arbitrary position of the receiver 3. It is necessary to set the size so that

When the receiver 3 is rotated from the talking position by 15 ° to a position in front of the talking position, the spheres 24A and 24B are displaced from the cam recesses 23A and 23B, which were different from the cam recesses 23A and 23B that were in the folding position. That is, they enter the cam recesses 23B and 23A, respectively. Then, the spheres 24A, 24B are pressed against the other end inclined portions 23b, 23b of the cam recesses 23B, 23A by the urging force of the coil spring 22, respectively. As a result, the fixed disk 12 is rotationally urged from the folding position side to the talking position side in the force direction (the direction of arrow B in FIG. 14). The fixed disk 12 and the receiver 3 are turned to the talking position by the turning urging force. When the receiver 3 is rotated to the talking position, the spheres 24A and 24B are positioned at the position where the receiver 3 is at the folding position (the position shown by the imaginary line in FIG. 14) and the recesses 23B and 23A. Are located symmetrically with respect to the center of. That is, it is located at a position away from the center of the cam recesses 23B, 23A by 10 ° in the circumferential direction of the fixed disk 12. At this time, the fixed disk 12 is moved from the folding position to the rotating disk 21, the fixed cylinder 11, and the transmitter 2.

180 °-(10 ° + 10 °) = 160 °

It just rotates to reach the calling section. In the call position, the spheres 24A and 24B abut against the other end side inclined portions 23b and 23b at the call position, so that the earpiece 3 remains in the folding position by the urging force of the coil spring 22 even after reaching the call position. Is rotated toward the communication position, and is maintained at the communication position by the rotation urging force.

[0026] When the receiver 3 manually rotated to the talking position is manually rotated to the folding position, the receiver 3 is moved to the coil spring 22 and other positions within a range of 15 ° from the talking position. The receiving section 3 is rotated against the biasing force of the end inclined section 23b, and the receiving section 3 is opposed to the frictional resistance generated between the spheres 24A, 24B and the fixed disk 12 in a stoppable range. Rotate. When the receiver 3 reaches the position 15 ° before the folding position, the spheres 24A, 24B enter the cam recesses 23A, 23B and come into contact with the one-side inclined portions 23a, 23a, respectively. 3 is pivoted to the folded position and maintained in the folded position.

Next, a configuration for automatically rotating the receiver 3 from the folding position to the talking position will be described. When the receiver 3 is automatically rotated, as described later, the fixed disk 12 and the rotating member 21 are in one position except when the fixed disk 12 is located at or near the folding position. Swivels around the body. In order to rotate the fixed disk 12 and the rotating member 21 integrally, a connection holding means 20 is provided between them.

That is, as shown by a solid line in FIG. 14, each of the spheres 24A and 24B has a center C around the circumference of the fixed disk 12 except when the earpiece 3 is located at the folding position and its vicinity. The spheres 24A and 24B are simultaneously in contact with the one-side inclined portion 23a and the other-side inclined portion 23b. In such a state, when the fixed disk 12 attempts to rotate in the direction of arrow A in FIG. 14 with respect to the rotating member 21, this is prevented by the one-side inclined portion 23a, and the rotation in the direction of arrow B is prevented. If so, the other end side inclined portion 23b blocks. Therefore, when the spheres 24A, 24B are located at the center of the cam recesses 23A, 23B, the fixed disk 12 and the rotating member 21 are biased by the biasing force of the coil spring 22 and one end of the inclined portion 23a and the other end. The inclined portions 23b are non-rotatably connected to each other by a holding force having a magnitude determined by the inclination angle _α . The one-side inclined portion 23a and the other-side inclined portion 23b may be configured such that the inclination angle at which the inclination at a constant inclination angle is not increased gradually increases as the central force of the cam recesses 23A and 23B also moves in the circumferential direction. .

As shown in FIG. 2 and FIG. 3, the hinge device 10 includes a rotation urging means 40 for automatically rotating the receiver 3 from the folding position to the talking position, and the receiver 3 to the folding position. And a lock releasing means 60 for releasing the locked state by the locking means 50 so that the receiver 3 can be turned to the talking position side. .

First, the rotation urging means 40 will be described. As shown in FIGS. 2, 3, 7, and 8, an end face of the large-diameter cylindrical portion 11a of the fixed cylinder 11 that faces the fixed disk 12 side. A pair of end face cams 41, 41 extending in the circumferential direction with the rotation axis L as the center is formed in the shaft. When viewed from the fixed disk 12 side, the end surface cam 41 is inclined so as to be separated from the fixed disk 12 according to the directional force from the folding position side to the talking position side. Hereinafter, the end of the end cam 41 on the fixed disk 12 side will be referred to as the starting end, and the opposite end will be referred to as the rear end. The end face cam 41 is formed to have a length of 180 ° in the circumferential direction. As shown in FIG. 15, the end face cam 41 has a main slope portion 41a that mostly extends from the starting edge (the point where the cam angle is 0 ° in the cam diagram shown in FIG. 15) toward the rear end. The rear end following the main slope 41a is a gentle slope 41b. The main slope 41a has a length of approximately 150 ° from the starting edge of the end cam 41. , Inclined at a constant angle / 3. The inclination angle 1 is set to an angle smaller than the inclination angle H. The gentle slope part 41b is formed over a range of approximately 30 ° from the rear end of the main slope part 41a to the rear end edge of the end cam 41 (the point where the cam angle is 180 °), and has a constant inclination angle β 2 It is inclined. The inclination angle 2 is set to an angle smaller than the inclination angle 1 of the main slope portion 41a.

The gentle slope 41b intersects with the main slope 41a at an angle (/ 3I_j32), but between the main slope 41a and the gentle slope 41b, an arc-shaped part in contact with them. By forming a curved surface, it is desirable that the gentle slope portion 41b be smoothly connected to the main slope portion 41a. Further, although the gentle slope 41b is inclined at a constant angle, the slope of the gentle slope 41b may be gradually reduced according to the force toward the rear edge. In this case, it is desirable to make the inclination angle of the starting edge of the gentle slope part 41b the same as the inclination angle of the main slope part 4 la, and to smoothly connect the two slope parts 4 la and 4 lb. ,.

As shown in FIGS. 8 and 15, on the end surface of the large-diameter cylindrical portion 11a facing the fixed disk 12 side, there is formed a contact surface 41c which is smoothly connected to the starting end edge of the end cam 41. The contact surface 41c is inclined in the same direction as the end cam 41, but the inclination angle is set to be larger than the inclination angle α.

As described above, since the end cam 41 has a circumferential length of 180 ° in terms of angle, the circumferential length of the end cam 41 and the contact surface 41c is: The length exceeds 180 °. The following configuration is employed for forming a pair of the end cam 41 and the contact surface 41c having a total length exceeding 180 ° on one end surface of the large-diameter cylindrical portion 11a.

That is, as shown in FIGS. 8 and 15, a pair of upright wall surfaces l ld and l id extending along the rotation axis L are provided on the end surface of the large-diameter cylindrical portion 11a facing the fixed disk 12 side. Is formed. The pair of upright walls l ld and l id are arranged 180 ° apart in the circumferential direction. Also, the upper end of each upright wall lid in FIG. 15 is disposed so as to intersect with the contact surface 41c. The end face cam 41 and the contact surface 41c are formed between the pair of upright wall surfaces lid, lid. Here, the circumferential length of the end surface cam 41 and the contact surface 41c is longer than 180 °. Therefore, a concave portion lie is formed below the standing wall surface lid. At least the open end of one side surface (the lower side surface in FIG. 15) of the concave portion ie is a rear end portion (slowly) of the end surface cam 41. (A part of the slope 41b). As a result, it is possible to make the total length of the end cam 41 and the contact surface 41c more than 180 °.

As shown in FIGS. 2 and 3, a movable member 42 is arranged between the fixed cylinder 11 and the rotating member 21. The movable member 42 functions as a follower for the end face cam 41, and is rotatably and slidably mounted on the hinge shaft 13. As shown in FIG. 2, FIG. 3, FIG. 7, and FIG. 11, a pair of abutting arms (abutting portions) protruding toward the fixed cylinder 11 side are provided on an end surface of the movable member 42 facing the end surface cam 41. 42a and 42a are formed. The distal ends of the contact arms 42a, 42a are in contact with the end cams 41, 41, respectively. The contact arm 42a is in contact with the start edge of the end cam 41 and the contact surface 41c as shown in FIG. The position of the movable member 42 is referred to as an initial position.), And when the receiver 3 is rotated to the talking position, the end cam 41 (a gentle slope portion) is located at a position 170 ° away from the start edge (hereinafter referred to as an end position). Touch 41b).

As shown in FIGS. 2 and 3, the movable member 42 has a cylindrical portion 42b extending toward the fixed disk 12 side. The cylindrical portion 42b is slidably and rotatably fitted to the hinge shaft 13. A tubular portion 21a is formed on the end surface of the rotating member 21 on the movable member 42 side. The cylindrical portion 21a is non-rotatably and slidably mounted on the cylindrical portion 42b of the movable member 42. Therefore, the rotating member 21 cannot move with respect to the movable member 42, but can rotate relative to the movable member 42 in the direction of the rotation axis L, and cannot rotate with the movable member 42. . Therefore, the position of the rotating member 21 when the movable member 42 is at the initial position is also referred to as the initial position, and the position of the rotating member 21 when the movable member 42 is at the terminal position is also the terminal position. Called.

[0037] Outside the cylindrical portion 21a, the coil spring 22 is provided with a slight gap. One end of the coil spring 22 abuts the movable member 42, and the other end abuts the rotating member 21. Accordingly, the coil spring 22 urges the movable member 42 toward the fixed cylinder 11 to press the contact arm 42a against the end cam 41. Of course, as described above, the coil spring 22 also urges the rotating member 21 toward the fixed disk 12 to press the spherical bodies 24A and 24B against the fixed disk 12. [0038] When the contact arm portion 42a comes into pressure contact with the end face cam 41, the urging force of the coil spring 22 is converted into a rotational urging force. Then, the rotating member 21 is rotated and biased from the folding position side toward the talking position side (from the initial position side to the end position side) by this rotating biasing force, and is rotated. Accordingly, when the movable member 42 can be freely rotated and moved, the rotating member 42 rotates to the talking position side, and the contact arm 42a moves from the start end side to the end end side on the end face cam 41. Slide down. When the movable member 42 rotates, the rotating member 21 rotates integrally with the movable member 42.

Here, it is assumed that the receiver 3 is located at the folding position. At this time, the centers of the spheres 24A, 24B move away from the center of the cam recesses 23A, 23B by 10 ° in the direction in which the center of the spheres 24A, 24B moves from the call position side to the folding position side (the direction of arrow A in FIG. 14). Are in contact with one end side inclined portions 23a, 23a of the cam recesses 23A, 23B, respectively. Therefore, immediately after the rotating member 21 starts rotating from the initial position to the talking position, the spheres 24A, 24B slide down on the inclining portions 23a, 23a toward the center of the cam recesses 23A, 23B. The rotating member 21 rotates relative to the fixed disk 12 toward the talking position (idle). Therefore, the fixed disk 12 maintains the stopped state. That is, during the initial rotation of the movable member 42 and the rotating member 21 from the initial position to the end position, the fixed disk 12 and the earpiece 3 maintain the stopped state at the folding position.

When the rotating member 21 rotates 10 ° from the initial position, the spheres 24A and 24B reach the center of the cam recesses 23A and 23B as shown by the solid line in FIG. As a result, the rotation member 21 is non-rotatably connected to the fixed disk 12 by the connection holding means 20 with a predetermined holding force. In addition, since the inclination angle _{α of} the one end side and the other end side inclined portions 23a and 23b is set to be larger than the inclination angle 1 of the main inclined surface portion 41a of the end cam 41, the rotating member 21 and the fixed disk 12 are connected. The holding force of the connection holding means 20 that is immovably connected is the turning urging force of the coil spring 22 converted by the end face cam 41, that is, the turning urging force that turns the movable member 42 and the turning member 21. Greater than. Therefore, after the rotating member 21 rotates from the initial position by 10 ° to the talking position side, the fixed disk 12 and the rotating member 21 are substantially non-rotatably connected, and the movable member 41 rotates. The rotation member 21 and the fixed disk 12 rotate with the movement. As a result, the receiver 3 starts rotating from the folding position toward the call position. When the movable member 42 and the rotating member 21 rotate 150 ° from the initial position, the tips of the contact arms 42a, 42a of the movable member 42 move from the main slope 41a to the gentle slope 41b. Then, since the inclination angle / 32 of the gentle slope portion 41b is smaller than the inclination angle 1 of the main slope portion 41a, the rotation urging force of the coil spring 22 on the movable member 42 decreases. As a result, the rotation speed of the movable member 42 is lower than when the contact arm 42a is in contact with the main slope 41a, and the rotation speed of the receiver 3 is correspondingly lower. The receiving section 3 is turned by 160 ° from the folding position and stops when the stop comes into contact with the transmitting section 2 when reaching the talking position. At this time, since the rotation speed of the receiver 3 is slow, the shock when the receiver 3 is stopped can be reduced.

When the receiver 3 is rotated to the talking position and stopped, the movable member 42 and the rotating member 21 are moved by 10 ° with respect to the talking unit 3 and the fixed disk 12 immediately after the rotation starts. , It is rotated 170 ° from the initial position, and is located at the end position. Therefore, the end positions of the movable member 42 and the rotating member 21 are the same as the talking positions of the fixed disk 12 (the receiver 3). Even after the receiving section 3 reaches the talking position, the movable member 42 continues to move toward the folding position due to the rotational biasing force of the coil spring 22 converted by the gentle slope 41b of the end cam 41. It is urged to rotate in the direction. With this rotational urging force, the fixed disk 12 is urged in the same direction via the movable member 42 and the fixed member 21, and the earpiece 3 is maintained in the talking position.

The receiver 3 rotated by the coil spring 22 from the folding position to the talking position is manually returned to the folding position. When the receiver 3 rotates to the folding position, the rotating member 21 and the movable member 42 rotate from the talking position to the folding position. Then, the tip of each contact arm 42a slides up on the end cam 41 toward the start end. In this case, each contact arm 42a may slide only on the end face cam 41. However, in this hinge device 10, the communication unit 3 is at a predetermined angle at the folding position (in this embodiment, (10 °), the contact arm 42a is provided with a gentle slope 41b in order to force the receiver 3 to rotate toward the folding position by the urging force of the coil spring 22. After sliding toward the starting end of the end face cam 41, it is configured to slide up on a pair of return inclined surfaces 5 la formed on the lock member 51. That is, as shown in FIGS. 2, 3, 7, and 9, the lock member 51 has a cylindrical shape, and is rotatable inside the fixed cylinder 11 from the fixed disk 12 side. Has been entered. However, when the movable member 42 is at the initial position or the terminal position, the lock member 51 is non-rotatably connected to the fixed cylinder 11 unless the operation button 61 is pressed, as described later. I have. The position of the lock member 51 at this time is the locking position. The locking member 51 is separated from the fixed disk 12 by abutting against a partition llf provided between the large-diameter cylindrical portion 11a and the small-diameter cylindrical portion l ib inside the fixed cylinder 11. Has become immovable.

As shown in FIGS. 7, 9, and 15, a pair of return inclined surfaces 51a, 51a extending in the circumferential direction around the rotation axis L is provided on an end surface of the lock member 51 facing the movable member 42. It is formed. The return inclined surface 51a is inclined in the same direction as the end cam 41, and the rear edge of the return inclined surface 51a is almost equal to the rear edge of the end cam 41 when the lock member 51 is at the engaging position. They are arranged to match. In addition, the return inclined surface 5 la is inclined with an inclination angle γ 1 larger than the inclination angle of the main inclined surface portion 4 la; 3 1, and when the return inclined surface 51 a is viewed in a direction orthogonal to the rotation axis L, As shown in FIGS. 15A and 15C, the end face cam 41 is arranged to intersect at a predetermined position in the circumferential direction. In this embodiment, at the position 150 ° away from the starting edge of the end cam 41 toward the rear end, that is, at the intersection of the main slope 41a and the gentle slope 41b, the return slope 51a is It intersects 41. As a result, the return slope 51a is located below the gentle slope 41b at the rear end of the intersection with the end cam 41 at the lower end in FIG. 15, and is located above the main slope 41a at the start end. It is located in. Therefore, when the receiver 3 is rotated from the talking position to the folding position, and the movable member 42 is accordingly rotated from the end position to the initial position, the abutting arm 42a initially has a gentle slope. Return from the position with a force of 150 ° to slide up on the part 41b and slide up on the slope 51a. When the contact arm 42a slides up on the return inclined surface 51a, the movable member 42 is rotationally urged toward the end position by the rotational urging force of the coil spring 22 converted by the return inclined surface 51a. . However, since the inclination angle γ1 of the return inclined surface 51a is set smaller than the inclination angles of the one-side inclined portion 23a and the other-side inclined portion 23b, the rotating member 21 is rotated by the rotational biasing force of the coil spring 22. The rotating member 21 and the fixed disk 12 do not rotate with respect to the fixed disk 12, and the rotating member 21 and the fixed disk 12 And are substantially non-rotatably connected. Therefore, when the contact arm 42a returns and slides up on the inclined surface 5la against the urging force of the coil spring 22, the receiver 3, the fixed disk 12, the rotating member 21, and the movable member 42 Rotate together.

When the receiver 3 is rotated from the talking position by approximately 130 ° toward the folding position, that is, by rotating approximately 30 ° from the folding position to a position in front of the folding position, the contact arm 42a is locked by the lock member. It returns to the end face of 51 and rides on the flat surface 51b formed following the inclined surface 51a. The flat surface 51b is formed by a plane whose angle with the rotation axis L is a right angle. Therefore, while the contact arm 42a is riding on the flat surface 51b, the receiver 3 can be stopped. The flat surface 5 lb is not necessarily formed, and a return cam surface 51c described below may be directly connected to the return inclined surface 51a.

When the receiving section 3 reaches a position 10 ° before the folding position, the contact arm section 42a comes into pressure contact with the return cam surface 51c formed following the flat surface 51b on the end surface of the lock member 51. I do. The return cam surface 51c is formed as a slope that forms a downward slope as the force moves from the talking position to the folding position. Therefore, when the contact arm 42a comes into contact with the return cam surface 51c, the urging force of the coil spring 22 is converted into a rotational urging force that rotationally urges the movable member 42 from the talking position to the folding position. The movable member 42 and the rotating member 21 are rotated toward the folding position by the rotation urging force, and the fixed disk 12 and the earpiece 3 are rotated toward the folding position. Then, when the receiver 3 reaches the folding position, the receiver 3 and the fixed disk 12 stop.

[0048] Here, if the inclination angle γ2 of the return cam surface 51c is equal to or less than the inclination angle _α of the negative end inclined portion 23a, the rotation of the coil spring 22 converted by the return cam surface 51c. The biasing force is equal to or less than the holding force of the connection holding means 20. Therefore, after the receiver 3 reaches the folding position, when the rotating member 21 attempts to further rotate in the direction of force from the talking position side to the folding position side, the rotating member 21 rotates in the same direction. The movement is stopped by the one end side inclined portion 23a of the connection holding means 20. Therefore, when the fixed disk 12 and the earpiece 3 reach the folding position, the rotating member 21 and the movable member 42 stop at the same time. However, actually, the inclination angle γ2 is set to be larger than the inclination angle. Therefore, the rotational urging force acting from the talking position side to the folding position side of the coil spring 22 converted by the return cam surface 51c is continuous. It is larger than the holding force of the knot holding means 20. For this reason, after the receiving section 3 reaches the folding position and the fixed disk 12 stops, the spheres 24A, 24B slide up on the inclining portions 23a, 23a. As a result, the rotating member 21 and the movable member 42 continue to rotate in the direction from the talking position side to the folding position side even after the reception section 3 reaches the folding position and stops. After the receiving unit 3 reaches the folding position, when the rotating member 21 and the movable member 42 further rotate 10 ° from the end position to the initial position (from the talking position to the folding position), the contact arm portion 42a hits the contact surface 41c. As a result, the movable member 42 and the rotating member 21 are stopped. The positions of the movable member 42 and the rotating member 21 at this time are initial positions. Therefore, at this time, the spheres 24A and 24B have returned to the positions indicated by the imaginary lines in FIG. The tip of the contact arm 42a is in contact with the contact surface 41c, the starting edge of the end cam 41, and the return cam surface 51c at the same time.

The locking means 50 is for locking the movable member 42 at the initial position, and has the above-mentioned hook member 51, stopper member 52 and return spring 53. A pair of guide grooves 51d, 51d extending in parallel with the rotation axis L are formed on one end face of the lock member 51, which comes into contact with the partition wall portion 1If, at 180 ° in the circumferential direction. The inner diameter of the lock member 51 is larger than the hinge shaft 13, and the inside of the lock member 51 is penetrated by the hinge shaft 13 with an annular gap.

[0050] As shown in Figs. 7 and 10, the stopper member 52 has a disk portion 52a. The disc portion 52a is rotatably fitted to one end of the lock member 51 on the side of the partition wall portion 1 # and movably in the direction of the rotation axis L. As shown in FIGS. 2 and 3, a central portion of the disk portion 52a is penetrated by the hinge shaft 13 so as to be rotatable and slidable. A pair of engaging projections 52b, 52b are formed on the outer periphery of the disc portion 52a at a circumferential distance of 180 °. Each engagement projection 52b is slidably inserted into each guide groove 51d of the lock member 51 in the direction of the rotation axis L. Thus, the stopper member 52 is non-rotatably connected to the lock member 51 so as to be movable in the direction of the rotation axis L.

[0051] Each of the engaging protrusions 52b, 52b protrudes from the disc portion 52a toward the partition wall portion 1If, and each protruding tip portion has a pair of locking holes penetrating the partition wall portion llf. l lg and l lg are inserted so that they can appear and disappear. The pair of locking holes l lg, l lg are also about the rotation axis L. They are arranged symmetrically. Therefore, the engaging projections 52b, 52b are fitted into the locking holes llg, llg each time the stopper member 52 rotates 180 °. In addition, the engagement protrusion 52b is disposed so as to fit into the locking hole lid when the movable member 42 is located at the initial position or the terminal position. The position of the lock member 51 and the stopper member 52 when the engagement protrusion 52b is fitted into the engagement hole 11g is the engagement position. In the engagement position, the stopper member 52 and the lock member 51 are fixed to the fixed cylinder 11. Is connected non-rotatably. On the other hand, when the engaging projection 52b also escapes the locking hole lg force, the stopper member 52 and the lock member 51 become rotatable with respect to the fixed cylinder 11.

[0052] The return spring 53 is formed of a coil spring, and the urging force thereof is set to be much smaller than the urging force of the coil spring 22. The return spring 53 is inserted into an annular gap between the outer peripheral surface of the hinge shaft 13 and the inner peripheral surface of the lock member 51. One end of the return spring 53 abuts a step surface 13 b formed on the outer peripheral surface of the intermediate portion of the hinge shaft 13, and the other end abuts the stopper member 52. Therefore, the return spring 53 always urges the stopper member 52 toward the partition wall 1 If side. Therefore, when the engaging protrusion 52b is in the locking hole llg, the state where the engaging protrusion 52b is in the locking hole llg is maintained as long as no external force acts on the stopper member 52. The state where the plate portion 52a abuts the partition wall portion 11c is maintained. On the other hand, when the engaging protrusion 52b escapes from the locking hole lid and the stopper member 52 rotates, the distal end surface of the engaging protrusion 52b slides on the partition wall llf.

When the lock member 51 is located at the locking position and the movable member 42 is at the initial position, the movable member 42 is moved from the talking position side to the folding position side by the return cam surface 51c in the direction of the force. Has been pushed to. However, the rotation of the movable member 42 in the same direction is prevented by the contact arm 42a abutting against the locking surface 41c. The movable member 42 is pushed from the folding position side to the talking position side by the coil spring 22 and the end cam 41 in the direction of the force, and the rotation in the same direction is prevented by the lock member 51. ing. Accordingly, the movable member 42 is maintained at the initial position without rotating from the initial position.

When the protruding portion 52b of the stopper member 52 escapes from the locking hole 11g in a state where the movable member 42 is located at the initial position, the lock member 51 is rotatable from the initial position to the talking position side. Become. As a result, the movable member 42 is talked from the initial position by the rotation urging means 40. It is rotated toward the position side. When the movable member 42 rotates, the lock member 51 is pushed by the movable member 42 and rotates in the same direction. At this time, the contact arm portion 42a of the movable member 42 slides down the return cam surface 51c, so that the hook member 51 moves with respect to the movable member 42 until the contact arm portion 42a slides down the return cam surface 51c. As a result, the contact arm portion 42a is rotated more as much as it slides down the return cam surface 51c. On the other hand, the surface 51e following the return cam surface 51c of the lock member 51 has a downward force in FIG. 15 and a downward force toward the call position as shown in FIG. 15, so that the movable member 42 has the return cam surface 51c. During the period from when the lock member 51 is rotated to the terminal position after being disengaged, the rotation amount of the lock member 51 is smaller than the rotation amount of the movable member 42. The difference in the amount of rotation at this time is equal to the difference in the amount of rotation between the movable member 42 and the lock member 51 due to the contact portion 42a sliding down the return cam surface 51c. Therefore, when the movable member 42 rotates from the initial position to the terminal position, the lock member 51 also rotates by 170 °. Of course, the stopper member 52 non-rotatably connected to the lock member 51 also rotates 170 °.

As described above, the engagement protrusions 52b, 52b of the stopper member 52 fit into the locking holes llg, llg each time the stopper member 52 rotates 180 °. Therefore, the engagement protrusions 52b, 52b cannot enter the locking holes lid, lid if the movable member 42 also rotates the initial position force by 170 °, and the locking member 51 is located at the locking position. Should not be able to do it. Therefore, as shown in FIG. 10 (D), of the two side surfaces of the pair of engaging projections 52b facing in the circumferential direction, at least one side facing the direction of force from the talking position side to the folding position side has: An inclined surface 52c is formed so as to be inclined from the folding position side to the talking position side in accordance with the directional force from the base end side to the distal end side of the engaging projection 52b. An inclined surface 52c is formed on both sides of 52b.). When the amount of inclination is converted into an angle in the circumferential direction, the inclined surface 52c is inclined by an angle slightly larger than 10 °. Therefore, when the stopper member 52 is rotated by 170 °, the tip of the inclined surface 52c has one side wall in the circumferential direction of the locking hole ILg, that is, one side wall that faces the direction of the force from the folding position side to the talking position side. opposite. Therefore, when the stopper member 52 is moved to the partition wall portion 1 If side (to the left in FIG. 2) by the return spring 53, the inclined surface 52c abuts one side wall of the locking hole lg. As a result, the stonot member 52 is rotated by 10 ° toward the call position while moving to the left in FIG. As a result, the stopper member 52 comes to the locking position again, and the stopper member 52 And the lock member 51 is non-rotatably locked to the fixed cylinder 11.

The lock release means 60 releases the locked state of the movable member 42 to the fixed cylinder 11 by the lock means 50, and the movable member 42 and the rotating member 21 rotate from the initial position to the talking position side. The operation buttons 61 are provided as shown in FIG. 2 and FIG. As shown in FIG. 7, the operation button 61 has a bottomed cylindrical main body 61a having an open end at one end and a bottom at the other end, and a pair of front ends extending forward from one end face of the main body 61a. It has engaging arms 6 lb and 6 lb. The engaging arms 61b and 6lb are elastically deformed so that the distance between the distal ends is increased so that the engaging arms 61b and 6lb pass over the stop ring 14 and then elastically return to the fixed cylinder 11b. Is mounted on the outer peripheral surface at the left end of the. In this mounted state, as shown in FIG. 5, the engagement arm portion 61b is slidably fitted into the engagement hole 11g formed in the fixed cylinder 11. Thus, the operation button 61 is connected to the fixed barrel 11 so as to be movable in the direction of the rotation axis L and non-rotatably. The engaging arms 61b, 61b are also capable of protruding and retracting into the locking holes llg, llg. When the lock member 51 is located at the lock position, the distal end surface of the engaging arm 61b is The stopper member 52 is in contact with the distal end surface of the engaging projection 52b. Therefore, the operation button 61 is urged leftward in FIG. However, when the engaging surface 61c formed on the engaging arm portion 61b abuts on the stopper 14, the operation button 61 is prevented from moving leftward.

When the receiver 3 is located at the folding position and the lock member 51 is located at the locking position, the operation button 61 is connected to the left end face of the connecting cylinder 2a in FIG. When the stopper is pushed toward the fixed cylinder 11 until it is located on substantially the same plane, the engaging projections 52b, 52b of the stopper member 52 are pushed by the engaging arms 61b, 61b and escape from the locking holes llg, llg. I do. Then, the stopper member 52 and the lock member 51 can rotate in the direction from the folding position side to the talking position side, and the movable member 42 and the rotating member 21 rotate from the initial position to the talking position side. When the rotating member 21 rotates 10 ° from the initial position, the spheres 24A, 24B slide down the inclining portions 23a, 23a to reach the center portions of the cam recesses 23A, 23B. Then, the spheres 24A and 24B come into contact with the other end side inclined portions 23b and 23b. Then, the fixed disk 12 starts to rotate integrally with the rotating member 21, and the receiver 3 rotates to the talking position side. Receiver 3 reaches the talk position and stops Then, the stopper member 52 is pushed by the return spring 53, and the engaging projection 52b enters the locking hole 11g. As a result, the lock member 51 and the stopper member 52 are again located at the locking position. Note that the receiver 3 rotated to the talking position is manually returned to the folding position as described above.

[0058] In the mobile phone provided with the hinge device 10 having the above configuration, the earpiece 3 is now manually rotated to a position within a stoppable range, for example, a position 90 ° away from the folding position to the talking position side. It shall be stopped manually. In this state, when the operation button 61 is pressed, the movable member 42 and the rotating member 21 are rotated by the movable urging means 40 from the initial position toward the terminal position. At the beginning of rotation, the spheres 24A and 24B slide on the surface of the fixed disk 12 facing the rotation member 21. Thereafter, when the rotating member 21 rotates approximately 100 ° (= 10 ° + 90 °) from the initial position, the spheres 24A, 24B slide down on the one-side inclined portions 23a, 23a of the engagement recesses 23A, 23B, It reaches the center of the engaging recesses 23A and 23B. Then, the spheres 24A, 24B hit the other end side inclined portions 23b, 23b of the engagement concave portions 23A, 23B. As a result, the rotating member 21 is stopped. After that, if the receiver 3 can be freely rotated thereafter, the fixed disk 12 rotates together with the rotating member 21 and the receiver 3 to the talking position.

[0059] As described above, in the state where the receiver 3 is stopped by hand within the stoppable range, the operation button

Even if 61 is pressed, no problem will occur if the spheres 24A, 24B are stopped by the other end inclined portions 23b, 23b. However, the spheres 24A and 24B slide down the one-side slopes 23a and 23a before hitting the other-side slopes 23b and 23b. For this reason, the rotating member 21 and the movable member 42 rotate at a high speed toward the talking position. Then, due to the inertial force of the rotating member 21 and the movable member 42, the spheres 24A, 24B may slide up the other inclined portions 23b, 23b of the cam recesses 23A, 23B and pass over the cam recesses 23A, 23B. . In such a case, after the spheres 24A and 24B have climbed over the cam recesses 23A and 23B, the rotating member 21 moves to the fixed disk 12 with respect to the fixed disk 12.

180 ° -90 ° = 90 °

However, it is further rotated in the direction of force from the folding position side to the talking position side (hereinafter referred to as excessive rotation). When the rotating member 21 and the movable member 42 are over-rotated, the over-rotated portion can be eliminated. The wound member 21 and the movable member 42 are maintained in an excessively rotated state with respect to the fixed disk 12. Under these circumstances, even if the receiver 3 is manually rotated to the folding position, the contact arm 42a of the movable member 42 does not reach the return cam surface 51c of the lock member 51. There is an inconvenience that 3 cannot be stopped at the folding position.

In order to prevent such inconvenience from occurring, in the hinge device 10, a stopper mechanism 70 is provided between the fixed disk 12 and the rotating member 21. The stopper mechanism 70 has contact protrusions 71 and 72 formed on respective opposing surfaces of the fixed disk 12 and the rotating member 21. The contact protrusions 71 and 72 prevent the rotation of the rotating member 21 with respect to the fixed disk 12 by abutting between circumferential side surfaces of the circumference around the rotation axis L and force S, While the hinge devices 10 are operating normally, they do not hit each other. However, when the movable member 42 and the rotating disk 21 are rotated from the initial position to the talking position side by the rotating urging means 40, the respective spheres 24A, 24B move from the center of the cam recesses 23A, 23B. The other end side inclined portions 23b, 23b are arranged so as to abut each other when the user tries to rotate over a predetermined angle. Here, the predetermined angle is, for example, a small angle of 5 ° or less, and is set to an angle smaller than the angle corresponding to the circumferential length of the other end side inclined portion 23b at the maximum. Therefore, even if the spheres 24A and 24B exceed the center of the cam recesses 23A and 23B, they cannot climb over the other-side inclined portions 23b and 23b, and the spheres 24A and 24B are not moved over the other-side inclined portions 23b and 23b. Before passing over 23b, the rotating member 21 is stopped. When the rotating member 21 stops in a state where the spheres 24A and 24B are in contact with the other end inclined portions 23b and 23b, the spheres 24A and 24B are moved to the center of the cam recesses 23A and 23B by the other end inclined portions 23b and 23b. Returned to the department. Therefore, the hinge device 10 maintains a normal state.

[0061] A cover tube 15 is provided outside a range extending from the intermediate portion of the fixed tube portion 11 to the rotating member 21. The cover cylinder 15 is for preventing the lubricating oil applied between the end cam 41 and the cylindrical parts 21a and 42b fitted to each other from leaking to the outside.

Next, a method of incorporating the hinge device 10 having the above configuration into the mobile phone 1 will be described. When assembling the hinge device 10 into the mobile phone 1, as shown in FIG. 4, the movable member 42 is rotated 180 ° from the initial position toward the talking position, and the contact arm 42a is recessed in the fixed cylinder 11. Keep it in contact with ie wall. In this state, the fixed disk 12 is It is located 170 ° apart. Next, the hinge device 10 is inserted into the first connection hole 2c from the opening on the second connection hole 3c side. In this case, the hinge device 10 enters the first connection hole 2c from the operation button 61. Then, the hinge device 10 is inserted into the first connection hole 2c until the fixed tube 11 comes into contact with the contact surface 2g formed on the inner peripheral surface of the connection tube portion 2a via the cover tube 15. In this state, a part of the main body 61a of the operation button 61 protrudes from the small-diameter hole 2e of the first connection hole 2c, and the entire fixed disk 12 protrudes outside from the first connection hole 2c. Thereafter, the fixed disk 12 is moved toward the fixed cylinder 11 against the urging force of the coil spring 22, and the entire fixed disk 12 is inserted into the first connection hole 2c. At this time, the hinge shaft 13 is also moved integrally with the fixed disk 12, and the entire hinge shaft 13 is also inserted into the first connection hole 2c. Next, the connecting shaft 3a is moved in the direction of the arrow in FIG. 4 so that the axis of the second connecting hole 3c coincides with the axis of the first connecting hole 2c, and the earpiece 3 is appropriately rotated to perform the second connecting. The circumferential phase of the hole 3c and the fixed disk 12 is adjusted (the phase of the key portion 2f and the key groove 11c is adjusted). When the axes of the second connection hole 3c and the first connection hole 2c coincide with each other, and the circumferential phase of the second connection hole 3c and the fixed disk 12 match, the fixing biased by the coil spring 22 is applied. The disc 12 fits into the first connection hole 3c. Thereby, the incorporation of the hinge device 10 into the mobile phone 1 is completed. Thereafter, the receiver 3 is rotated from the talking position to the folding position. Normally, the receiver 3 is located at the folding position. In this state, a stopper for positioning the talking position is attached to the transmitter 2 or the receiver 3. Thus, the connection operation of the transmitting unit 2 and the receiving unit 3 by the hinge device 10 is completed.

The present invention is not limited to the above-described embodiment, but can be appropriately modified.

For example, in the above-described embodiment, the hinge device 10 according to the present invention is used for the mobile phone 1. The hinge device 10 rotatably connects the main body of the notebook computer and the liquid crystal display. Can be used as a hinge device.

Also, in the above embodiment, the lock member 51 is formed with the return inclined surface 51a, the flat surface 5lb, and the return cam surface 51c, and the receiver 3 automatically rotated to the talking position is moved to the folding position. When returning, the contact arm 42a of the movable member 42 is brought into contact with the return inclined surface 51a, the flat surface 51b, and the return cam surface 51c. May be.

Further, in the above-described embodiment, the fixed disk 12 and the rotating member 21 are integrated by the connecting and holding means 20 with a holding force larger than the rotating urging force of the end cam 41 and the coil spring 22. Thus, the rotating urging force acting on the movable member 42 is transmitted to the fixed disk 12 via the rotating member 21, but the fixed disk (second hinge member) 12 is When there is no need to manually rotate the hinge member 11 from the folding position to the talking position, the rotating member 21 may be provided integrally with the fixed disk 12. In other words, the movable member 42 may be directly and non-rotatably connected to the fixed disk 12 without the rotation member 21. If the fixed disk 12 can be moved integrally with the movable member 42 in the direction of the rotation axis, the movable member 42 may be formed integrally with the fixed disk 12.

Furthermore, in the above embodiment, two pairs of the end cam 41 and the upright wall lid are formed on the surface of the fixed cylinder 11 facing the movable member 42, but three or more are formed. May be. The three or more end face cams 41 and the upright wall lid are arranged at regular intervals in the circumferential direction about the rotation axis L. Further, the number of the contact arm portions 42a is equal to that of the end face cam 41. This is the same also when the contact portion is formed on the fixed cylinder 11 and the end face cam is formed on the movable member 42.

Industrial applicability

[0064] The hinge device according to the present invention is, for example, a hinge device for connecting a transmitting unit and a receiving unit of a mobile phone, or a main body unit and a display unit of a notebook personal computer. Can be used as a hinge device.

Brief Description of Drawings

FIG. 1 is a diagram showing a mobile phone using a hinge device according to the present invention in a state where it is opened to a talking position, where FIG. 1 (A) is a front view thereof, and FIG. 1 (B) is a view thereof. It is a side view.

FIG. 2 is a view showing the hinge device according to the present invention in a state where the fixed disk is located at the folding position, where FIG. 2 (A) is an enlarged cross-sectional view along the line XX of FIG. 1 (A), FIG. 2B is a cross-sectional view taken along the line BB of FIG. 2A.

FIG. 3 is a view showing the hinge device in a state where a fixed disk is located at a talking position, and FIGS. 3 (A) and (B) are cross-sectional views similar to FIGS. 2 (A) and (B), respectively. FIG. FIG. 4 is a cross-sectional view for explaining a method of incorporating the hinge device into a mobile phone.

FIG. 5 is an enlarged sectional view taken along line XX of FIG. 2.

FIG. 6 is a view on arrow X in FIG. 4.

FIG. 7 is an exploded perspective view of the hinge device.

FIG. 8 is a view showing a fixing cylinder used in the hinge device, and FIG. 8 (A) is a side view thereof, and FIG. 8 (B) is a drawing of FIG. 8 (A). 8 (C) is a view taken in the direction of the arrow C in FIG. 8 (A), FIG. 8 (D) is a partially omitted cross-sectional view taken along the line D--D in FIG. 8 (B), and FIG. ) Is a partially omitted cross-sectional view along the line EE in FIG. 8C.

FIG. 9 is a view showing a lock member used in the hinge device, wherein FIG. 9 (A) is a side view thereof, and FIGS. 9 (B) and (C) are arrows B in FIG. 9 (A), respectively. FIG.

FIG. 10 is a view showing a stopper member used in the hinge device, wherein FIG. 10 (A) is a side view thereof, and FIGS. 10 (B), (C), and (D) are respectively FIGS. ) Is a view taken in the direction of the arrows B, C, and D.

FIG. 11 is a view showing a movable member used in the hinge device, wherein FIG. 11 (A) is a side view thereof, and FIGS. 11 (B) and (C) are arrows B in FIG. 11 (A), respectively. FIG. 11D is a sectional view taken along the line DD in FIG. 11B.

FIG. 12 is a view showing a rotating member used in the hinge device, and FIG. 12 (A) is a side view thereof, and FIGS. FIG. 12 (A) is a sectional view taken along arrows B and C, and FIG. 12 (D) is a sectional view taken along line DD in FIG. 12 (C).

FIG. 13 is a view showing a fixed disk used in the hinge device, wherein FIG. 13 (A) is a side view thereof, and FIGS. 13 (D) is a cross-sectional view taken along line DD in FIG. 13 (B).

FIG. 14 is an enlarged sectional view taken along line XX of FIG. 13 showing a relationship between a cam recess and a spherical body.

FIG. 15 is a cam diagram showing a relationship among an end surface cam of a fixed cylinder, a contact arm of a movable member, and a return inclined surface, a flat surface, and a return cam surface of a lock member.

Explanation of symbols

L Rotation axis

10 Hinge device Fixed tube (first hinge member) Standing wall

Recess

Fixed disk (second hinge member) Coil spring (biasing means) End cam

Movable member

Contact arm (contact part)

Claims

The scope of the claims

[1] A first hinge member, a second hinge member rotatably connected to the first hinge member, and a rotation axis on the rotation axis of the first and second hinge members. A movable member arranged rotatably around the center and movable in the direction of the rotation axis, and biasing means for biasing the movable member toward the first hinge member. A plurality of end face cams extending circumferentially around the rotation axis are provided at one of the opposing surfaces of the hinge member and the movable member at equal intervals in the circumferential direction around the rotation axis. An upright wall surface extending in the rotation axis direction is provided between two end face cams adjacent to each other in the direction, and the other end face is pressed against the pair of end face cams by the urging force of the urging means, and In cooperation with the cam, the urging force of the urging means is transmitted through the movable member. In the hinge device abutting portions of the pair is provided for converting the rotational biasing force for rotating the second hinge member Te,

A hinge device, wherein a concave portion is formed in the upright wall surface, and the concave portion is arranged on an extension of the end face cam.

2. The hinge device according to claim 1, wherein one side surface of the recess forms a part of the end face cam.

3. The hinge device according to claim 2, wherein the end cam has a length of 180 ° or more in a circumferential direction.