WO2003044380A1

WO2003044380A1 - Hinge device

Info

Publication number: WO2003044380A1
Application number: PCT/JP2002/012165
Authority: WO
Inventors: Shinichiro Koshikawa
Original assignee: Sugatsune Kogyo Co., Ltd.
Priority date: 2001-11-22
Filing date: 2002-11-21
Publication date: 2003-05-30
Also published as: CN1585863A; CN1268854C

Abstract

A hinge device provided with a first hinge member (21), a second hinge member (22) that is swingable from a first position to a second position with respect to the first hinge member, a swing-urging member (23) for urging the second hinge member toward the second position, latch means (24) for latching the second hinge member at the first position, and latch release means (25) for releasing the latched state caused by the latch means. The latch means includes a contact member (241) having a contact surface that butts against the second hinge member, a latch member (242) having an engagement projection (242b) that is linked in a non-swingable and axially movable manner to the contact member and engages disengageably with a latch depression portion (21g) of the first hinge member, and return-urging means (243) for urging the latch member toward the latch release means. The latch release means has an operation member (251) provided with a contact projection (251b) for disengaging the latch projection from the latch depression by a push-in operation in an axial direction by an operator.

Description

Description Hinge device Technical field

The present invention relates to a hinge device which is used, for example, in a foldable mobile phone and is capable of rotating a receiving section of the foldable mobile phone from a folding position to a talking position with respect to a transmitting section by one-touch operation of an operation member. About. Background art

As a conventional hinge device of this type, there is, for example, one disclosed in Japanese Patent Application Laid-Open No. 2001-207721. The hinge device is arranged so as to be relatively rotatable on a rotation axis of a transmitting unit and a receiving unit of the foldable mobile phone, and the first unit is provided so as to be non-rotatable in the transmitting unit and the receiving unit. A second hinge member, movable urging means for urging the second hinge member to pivot from the folded position to the talking position, locking means for locking the second hinge member at the folded position, Lock releasing means for releasing the locked state of the second hinge member by the means. -The locking means has a contact member and a locking member. The contact member is rotatably fitted to the inner periphery of the first hinge member formed in a cylindrical shape. At the end of the contact member on the side of the second hinge member, there is formed a contact surface against which the second hinge member abuts when rotating from the folded position to the talking position side. The locking member is disposed between the inner peripheral surface of the first hinge member and the outer peripheral surface of the contact member so as to be movable in the direction of the rotation axis. The outer peripheral surface is non-rotatably engaged with the inner peripheral surface of the first hinge member and the outer peripheral surface of the contact member. Thereby, the contact member is non-rotatably locked to the first hinge member via the locking member. As a result, the second hinge member cannot rotate from the folded position to the talking position. When the lock member is moved from the lock position to the release position by the operation member of the lock release means, the lock state by the lock member is released. Therefore, the second hinge member is rotatable from the folding position to the talking position. In the above-mentioned conventional hinge device, the locking member is disposed between the inner peripheral surface of the first hinge member and the outer peripheral surface of the contact member, and the outer peripheral surface and the inner peripheral surface of the locking member are the first hinge. Because the inner peripheral surface of the hinge member is engaged with the outer peripheral surface of the contact member, the outermost first hinge member must be enlarged in diameter, and as a result, the entire hinge device becomes large. There was a problem of being typed. Disclosure of the invention

In order to solve the above problems, the present invention provides a first hinge member disposed on a rotation axis, a first hinge member disposed on the rotation axis to face the first hinge member, A second hinge member rotatable with respect to the member between a first position and a second position; and a rotation for rotating the second hinge member from the first position to the second position. Urging means, locking means for locking the second hinge member at the first position against the rotational urging force of the rotational urging means, and the second hinge by the locking means A hinge device comprising: a lock releasing means for releasing a locked state of a member; wherein the first hinge member has a locking recess formed in the rotation axis direction; The first hinge member and the second hinge member are disposed so as to be rotatable around the rotation axis, (2) a contact member having a contact surface that abuts when the hinge member rotates from the first position to the second position, and an end of the contact member on the first hinge member side. A locking member having a locking projection that is non-rotatable and movably connected in the direction of the rotation axis and engages with the locking recess in a detachable manner; A return urging means for urging the hinge member side to the first hinge member side, wherein the lock release means has the first hinge member interposed therebetween and the rotation is opposite to the lock member. An abutting projection that is arranged movably in the axial direction and that enters the locking claw when it is moved in a direction approaching the first hinge member and detaches the engagement projection from the locking recess; Characterized in that it has an operating member provided with. In this case, the first hinge member is formed as a cylindrical body having an opening at the end on the second hinge member side and a bottom at the opposite end, and the bottom of the first hinge member has A through hole is formed as a stop recess, and the locking member and the contact member are sequentially rotatably inserted into the first hinge member, and face the bottom of the first hinge member. It is preferable that the locking projection is formed on a facing surface of the locking member. The position of the first position and the second position are 180 in the circumferential direction about the rotation axis. When the second hinge member is separated by a smaller angle and at least a part of the second hinge member on the first hinge member side is a movable portion, the movable portion cannot rotate with respect to the remaining portion of the second hinge member. And the rotation urging means urges the movable portion along the rotation axis to abut on the first hinge member. And a biasing force provided along at least one of a contact surface of the movable portion and the first hinge member, the biasing force along the rotation axis direction of the linear motion biasing means being centered on the rotation axis. In addition to converting to a biasing force, the movable portion is rotated from the first position side to the second position side as the movable portion is moved from the second hinge member side to the first hinge member side. A cam surface, and the first hinge member has the locking recess. A pair of locking projections are provided symmetrically about the rotation axis, and the locking member is provided with a pair of locking projections symmetrically about the rotation axis. The locking member is 180 degrees around the rotation axis. Each time it rotates, it faces the pair of locking recesses, and when the locking member is moved toward the first hinge member by the return biasing means, the locking member is able to protrude and retract into the pair of locking recesses. The abutting member is configured such that when the pair of -locking projections is fitted into the pair of locking recesses, and the second hinge member is located at the first position, When the contact surface abuts on the movable portion, the movable portion is prevented from rotating from the first position to the second position, and the operating member is moved by the return biasing means. The first hinge member is biased in the direction from the second hinge member side to the first hinge member side via a stop member, and the second hinge member is moved from the first hinge member side to the initial position and the initial position. Between the release position and the operation unit When the material is moved from the initial position to the release position against the biasing force of the return biasing means, the locking is performed until the pair of locking projections are pulled out of the pair of locking recesses. The member is moved against the urging force of the return urging means, and is returned from the release position to the initial position via the locking member by the return urging means. The contact surface has an inclined surface on which the movable member slides when the movable portion moves from the second hinge member side to the first hinge member side, When the movable portion rotates from the first position to the second position, the inclined surface moves together with the first and second hinge members from the second hinge member to the first hinge member. The contact member is rotated from the first position side toward the second position side by an angle difference between the angle in the circumferential direction between the positions 2 and 180 °. Is desirable.

The second hinge member has a main body portion as the remaining portion fixedly arranged on the rotation axis, and an end of the main body portion on the first hinge member side has It is preferable that the movable portion formed separately from the main body is connected so as not to rotate and to be movable in the rotation axis direction.

It is preferable that the inclined surface is arranged so as to abut on the movable portion when the movable portion is rotated from the second position by a predetermined angle to just before the first position. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a diagram showing an embodiment of a mobile phone using the hinge device according to the present invention, and FIG. 1 (A) is a side view showing a state where a receiver is turned to a talking position, FIG. 1 (B) is a front view thereof. '

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

FIG. 3 is a sectional view taken along line XX of FIG. 2 showing the hinge device according to the present invention. FIG. 4 is a sectional view taken along line XX of FIG.

FIG. 5 is an exploded perspective view of the hinge device, omitting a coil spring and a return spring.

FIG. 6 is a view showing a first hinge member of the hinge device, wherein FIG. 6 (A) is a front view thereof, and FIGS. 6 (B), (C) and (D) are each a view of FIG. 6 (A). B, C, and D views, and FIG. 6 (E) is a cross-sectional view along the line EE in FIG. 6 (C).

FIG. 7 is a view showing a locking member of the hinge device. FIG. 7 (A) is a front view thereof, and FIGS. 7 (B) and (C) are views taken along arrows B and C of FIG. 7 (A), respectively. FIG.

FIG. 8 is a diagram showing a pressing member of the hinge device, wherein FIG. 8 (A) is a front view thereof, and FIGS. 8 (B) and (D) are views taken along arrows B and D of FIG. 8 (A), respectively. Fig. 8 (C) shows Fig. 8 (B) FIG. 3 is a cross-sectional view taken along line C-C of FIG.

Fig. 9 is a view showing an intermediate member of the hinge device, where Fig. 9 (A) is a front view thereof, and Figs. 9 (B), (C) and (D) are B and B of Fig. 9 (A), respectively. C and D views, and FIG. 9 (E) is a cross-sectional view along the line EE in FIG. 9 (C).

FIG. 10 is a view showing a second hinge member of the hinge device. FIG. 10 (A) is a front view thereof, and FIG. 10 (B) is a cross-sectional view taken along line BB of FIG. 10 (A). FIGS. 10 (C) and 10 (D) are views taken along arrows C and D in FIG. 10 (A), respectively.

Fig. 11 is a diagram showing a movable member of the same syringe device. Fig. 11 (A) is a front view thereof, and Figs. 11 (B), (C), and (D) are each a diagram shown in Fig. 11 ( FIG. 11 (A) is a sectional view taken along the line E--E of FIG. 11 (A).

FIG. 12 is a view showing a first engagement member of the hinge device, FIG. 12 (A) is a plan view thereof, and FIG. 12 (B) is a view taken in the direction of arrow B in FIG. 12 (A). FIG. 12 (C) is a sectional view taken along line C-C of FIG. 12 (A).

FIG. 13 is a view showing a second engaging member of the hinge device, wherein FIG. 13 (A) is a front view thereof, and FIGS. 13 (B) and 13 (C) are FIGS. 13 (A) and 13 (A), respectively. B and C views, and FIG. 13 (D) is an enlarged cross-sectional view along the line DD in FIG. 13 (B).

FIG. 14 is a diagram showing the operation of the end face cam ', the return slope and the slope in the hinge device. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an example of a foldable mobile phone using the hinge device according to the present invention. The mobile phone 1 includes a transmitting unit 2 and a receiving unit 3. A small microphone and various keys (none of which are shown) are provided on the front surface 2a of the transmitter 2. A small speaker (not shown) and a liquid crystal display 3b are provided on the front surface 3a of the receiver 3.

At the end of the transmitting section 2 on the receiving section 3 side, two connecting cylinder sections 2b are provided. The two connecting cylinders 2 b are arranged at both ends in the left-right direction of the transmitting unit 2. At the end of the receiver 3 on the side of the transmitter 2, two connecting cylinders 3 c are provided. Two connecting cylinders The part 3c is arranged between the connecting cylinder parts 2b, 2b of the transmitting part 2, and is almost in contact with the respective inner end faces of the adjacent connecting cylinder parts 2b. The connecting cylinders 2b and 3c are arranged such that their axes are aligned with the rotation axis L.

One of the two sets of connecting cylinders 2 b and 3 c adjacent to each other; 2 b and 3 c (the set on the left side in FIG. 1) is formed by the hinge device 10 (see FIG. 2) according to the present invention. It is connected so as to be rotatable about the rotation axis L. The other pair (right side pair) of the connection cylinder portions 2 b and 3 c is rotatably connected around a rotation axis L by a well-known hinge device (not shown). As a result, the transmission section 2 and the reception section 3 are rotatably connected about the rotation axis L. Note that, for convenience of explanation, the following description will be made assuming that the receiver 3 rotates with respect to the transmitter 2.

The receiver 3 is rotatable with respect to the transmitter 2 between a folded position (first position) and a call position (second position). The folded position is regulated by the front face 3 a of the receiver 3 abutting the front face 2 a of the transmitter 2. The call position is determined by the contact portions (the contact portions provided on the transmitting portion 2 and the receiving portion 3, respectively) when the receiving portion 3 is rotated by a predetermined angle (165 ° in this embodiment) from the folded position. (Not shown) are regulated by hitting each other. Therefore, the receiver 3 cannot rotate beyond the folding position in the direction from the talking position to the folding position, and rotate beyond the talking position in the direction from the folding position to the talking position. Can no longer move.

First, the function of the hinge device 10 will be schematically described. Let's assume that the receiver 3 is located at the folding position. In this state, when the operation button 25 of the hinge device 10 is pressed, the receiver 3 is automatically rotated from the folded position to the talking position by the rotation urging force of the hinge device 10. The receiver 3 turned to the talking position is manually turned to the folding position against the urging force of the hinge device 10. When the receiver 3 is rotated by a predetermined angle (approximately 10 ° in this embodiment) of the folded position, the receiver 3 is rotated to the folded position by the rotation urging force of the hinge device 10. In addition to being folded, the front surface 3a of the receiver 3 is kept in the folded position by abutting the front surface 2a of the transmitter 2.

The receiver 3 can be manually rotated between the folded position and the talk position. You. First, the case where the receiver 3 is rotated from the folding position to the talking position will be described. In a predetermined angle range (about 10 ° in this embodiment) from the folding position, the receiver 3 is connected to the hinge device 1. Rotate against 0 rotational biasing force. After that, until a predetermined angle (approximately 10 ° in this embodiment) of the talk position is approached, the earpiece 3 is turned toward the talk position against the frictional resistance generated inside the hinge device 10. Move. When the receiver 3 rotates by a predetermined angle before the talking position, the receiver 3 is not only rotated to the talking position but also maintained at the talking position by the urging force of the hinge device 10 thereafter. . Conversely, when rotating the receiving section 3 from the talking position to the folding position side, the receiving section 3 is connected to the hinge device 10 within a predetermined angle (10 in this embodiment). Rotate against the urging force. After that, the receiving unit 3 is moved toward the folding position against a frictional resistance generated inside the hinge device 10 until a predetermined angle (about 10 ° in this embodiment) of the folding position is short. Rotate. When the receiver 3 is rotated to a predetermined angle (about 10 ° in this embodiment) of the folding position, the receiver 3 is thereafter rotated to the folding position by the rotation urging force of the hinge device 10. Is maintained in that position.

Next, a specific configuration of the hinge device 10 having the above function will be described. As shown in FIGS. 2 to 4, the hinge device 10 includes a first hinge portion 20 for automatically rotating the receiving unit 3 from the folded position to the talking position, and a manually rotating the receiving unit 3. And a second hinge portion 30 that operates when the operation is performed.

First, the first hinge portion 20 will be described. The first hinge portion 20 includes a first hinge member 21, a second hinge member 22, a rotation urging means 23, a locking means 24 and It has unlocking means 25.

As shown in FIGS. 5 and 6, the first hinge member 21 is formed as a cylindrical body having one end opened and the other end having a bottom 21 f. As shown in FIG. It is inserted and fixed to the connecting cylinder part 2 b of the part 2. Therefore, the first hinge member 21 does not move or rotate in the direction of the rotation axis L (here, it is assumed that the transmission unit 2 is fixed and the reception unit 3 rotates). Assumed.) On the other hand, the second hinge member 22 is composed of a cylindrical main body 22 A and a movable part 22 B. The main body 22A is rotatably inserted into the connecting cylinder 3c of the earpiece 3. It is non-rotatably connected to the connection cylinder 3c via the hinge 30. Therefore, the main body 22 A of the second hinge member 22 rotates together with the earpiece 3. However, the second hinge member 22 rotates relative to the connecting tubular portion 3c when the second hinge portion 30 operates, that is, when the receiver 3 is manually rotated. The movable section 22B will be described later.

The first hinge member 21 and the main body 22 A of the second hinge member 22 are rotatably connected via a hinge shaft 41 whose axis is aligned with the rotation axis L. The hinge shaft 41 is, as shown in FIGS. 3 to 5, from one end to the other end (from left end to right end in FIGS. 1 to 4; hereinafter, left and right means left and right in FIGS. 1 to 4). The head 41 a formed in the shape of a disk, a large-diameter portion 41 b smaller in diameter than the head 41 a, and a small-diameter portion smaller than the large-diameter portion 41 b formed in order toward It has 4 1 c.

As shown in FIG. 3, a small-diameter hole 21a formed in the bottom 21f of the first hinge member 21 is rotatably fitted to the large-diameter portion 41b of the hinge shaft 41. ing. The first hinge member 21 is prevented from falling off to the left by its bottom 21 f abutting on the head 41 a. On the other hand, a cylindrical member 42 is fitted to the small diameter portion 41c of the hinge shaft 41. A flange 42 a is formed at the left end of the cylindrical member 42, and a step formed between the large-diameter portion 4 l'b and the small-diameter portion 41 c is formed at the flange 42 a. By abutting on the part 41d, the leftward movement of the cylindrical member 42 is prevented. The first engagement member 31 of the second hinge portion 30 is rotatably fitted to the right end of the small-diameter portion 41c protruding rightward from the cylindrical member 42. The first engagement member 31 abuts against the right end face of the cylindrical member 42 and is prevented from falling off to the right by a retaining ring 43. Thus, the cylindrical member 42 and the first engagement member 31 are fitted to the small diameter portion 41c of the hinge shaft 41 so as not to move in the direction of the rotation axis L.

The second engagement member 32 of the second hinge portion 30 is rotatably fitted to the right end of the cylindrical member 42. The inner periphery of the right end of the main body 22 A of the second hinge member 22 is fitted around the outer periphery of the second engagement member 32. A locking groove 22 a extending parallel to the rotation axis L is formed at the right end of the main body 22 A, and the locking groove 22 a has an outer periphery of the second engagement member 32. The key portion 32a formed in is fitted. As a result, the second engagement member 32 cannot rotate with respect to the main body 22 A, and moves in the direction of the rotation axis L. It is connected as possible. Here, since the second engagement member 32 is rotatably fitted to the cylinder member 42, the main body 22A is formed by the second engagement member 32, the cylinder member 42, and the hinge shaft 4. The first hinge member 21 is rotatably connected to the first hinge member 21 via the first hinge member 21. As a result, the transmitting unit 2 and the receiving unit 3 rotate via the first hinge member 21, the hinge shaft 41, the cylindrical member 42, the second engaging member 32, and the main body 22 A. It is connected as possible.

The turning urging means 23 turns the second hinge member 22 from the folded position to the talking position by the turning urging force, and thus turns the earpiece 3 from the folded position to the talking position. It is configured as follows. That is, as shown in FIGS. 2 to 6, a pair of end face cams (cam surfaces) 21 b, 2 extending in the circumferential direction are provided on the right end face of the first hinge member 21 facing the second hinge member 22. One is formed point-symmetrically about the rotation axis L. On the other hand, as shown in FIGS. 2 to 5 and 10, the left end face of the main body part 22 of the second hinge member 22 facing the first hinge member 21 is parallel to the rotation axis L. Two extending second guide grooves 22b are formed 180 ° apart in the circumferential direction. In each of the second guide grooves 22b, two plate portions 22c and 22c of a movable portion 22b rotatably and slidably fitted on the outer periphery of the cylindrical member 42 are provided. Each is slidably inserted. Therefore, the movable part 22B is connected to the main body part 22A so as not to be able to rotate and to be movable in the direction of the rotation axis L. The movable portion 22B is formed along the rotation axis by two large and small coil springs (linear motion biasing means) 43A and 43B provided between the movable portion 22B and the second engagement member 32. The first hinge member 21 is urged toward the first side, and the urging force forms a semicircular arc portion 2 2d, 2 formed on each of the left end surfaces of the two plate portions 22 c, 2 c. 2d abuts against the end cams 21b and 21b of the first hinge member 21 respectively. The end face cam 2 lb converts the urging force of the coil springs 43A and 43B acting on the movable part 22B in the direction of the rotation axis L into a rotation urging force about the rotation axis L. . The second urging member (the movable part 22B and the main body part 22A) is rotationally urged from the folded position side to the talking position side by the rotational urging force. The earpiece 3 is urged from the folded position side to the talking position side via the 1 engaging member 31.

Here, as shown in FIG. 14, the arc portion 2 2 d of the movable portion 2 2 B, when the earpiece 3 is located at the folded position, is the upper end (right end) of the end face cam 2 lb. In contact with ing. The peripheral angle from the upper end to the lower end of the end cam 21b is set to an angle (for example, 160 °) slightly smaller than the maximum rotation angle (165 °) of the receiver 3, but the end face At the lower end (left end) of the cam 21b, a recess 21c is formed subsequently to the lower end (left end). When the earpiece 3 rotates to the talking position, the arcuate portion 22d contacts the inclined portion located on the end cam 21b side of the center of curvature of the bottom surface defining the recess 21c. However, even after the receiving section 3 reaches the talking position, the movable section 22B and, by extension, the receiving section 3 are urged in the direction from the folding position side to the talking position side by the inclined portion. Therefore, a portion of the bottom surface of the concave portion 21c on the side of the end cam 21b also forms a cam surface together with the end cam 21b.

The locking means 24 is for stopping the second hinge member 22 in the folded position against the rotational urging force of the rotational urging means 23, as shown in FIGS. In addition, a contact member 241, a locking member 2442, and a return spring (return biasing means) 2443 are provided.

As shown in FIGS. 2 to 5 and 7, the contact member 2 41 has a cylindrical shape, and has a large-diameter hole 21 d formed on the right end side of the first hinge member 21. It is fitted rotatably. On the right end face of the contact member 241, two contact surfaces 241a are arranged and formed point-symmetrically about the rotation axis L. The contact surface 24 1 a is composed of an inclined surface 24 1 b inclined at a predetermined angle (approximately 30 in this embodiment) with respect to the rotation axis 镍, and an inclined surface 2 41 1 and a straight surface 241 c extending along the rotation axis L from the left end of b. When the receiver 3 is located at the folded position, the arcuate portion 2 2 d of the movable portion 2 2 B abuts on the upper end of the inclined surface 24 1 b. Therefore, unless the contact member 24 1 rotates from the folding position to the talking position, the movable portion 22B cannot rotate from the folding position to the talking position. The hinge member 22 and the earpiece 3 are stopped at the folded position. In addition, in a state where the arc portion 2 2d abuts on the inclined surface 2 41 b, the biasing force of the coil springs 43A and 43B is converted into a rotational biasing force by the inclined surface 2 41b. With this rotational urging force, the movable part 22B is urged in the direction from the talking position side to the folding position side, whereby the receiving unit 3 is brought into contact with the transmitting unit 2, that is, maintained in the folded position. It is. The contact member 2 41 is rotated by the biasing force of the coil springs 43 A and 43 B. It is also urged leftward in the direction of the moving axis L, and the urging force causes the left end face of the contact member 241 to abut against the right end face of the bottom 21 f.

When the movable part 2 2B is stopped at the folding position by the contact member 241, and the receiving unit 3 is located at the folding position, as described above, the arc part of the movable part 2 2B Although 2 2 d almost contacts the upper end (right end) of the end cam 21 b, the right end of the first hinge member 21 further extends from the upper end of the end cam 21 b. An arc surface 21 e extending upward (to the right) is formed. When the hinge device 1 ′ 0 is incorporated in the mobile phone 1, the arc surface portion 21 e hardly contacts the arc portion 22 d of the movable portion 22 B, but the entire hinge device 10 is portable. When treated as a cut before being incorporated into the telephone 1, the arc of the movable portion 22B that is pivotally biased from the second position to the first position by the inclined surface 241b. Part 2 Receive 2d. This prevents the arc portion 22d from falling off the upper end of the end cam 21b.

The locking member 242 is used to fix the position of the contact member 241 at the folded position. As shown in FIGS. 2 to 5 and FIG. 9, the locking member 242 has a main body 242a in the form of a circular ring. The main body 2 42 a can rotate about the rotation axis L between the outer peripheral surface of the large-diameter portion 41 b of the hinge shaft 41 and the inner peripheral surface of the contact member 24 1. In addition, it is arranged so as to be movable in the direction of the rotation axis L. The main body 2 42 a is urged leftward by a return spring 2 43 provided between the main body 2 42 a and the flange portion 42 a of the cylindrical member 42, and the bottom 21 f of the first hinge member 21 It is struck by.

On the outer peripheral surface of the main body portion 2 42 a of the locking member 2 42, two engaging arm portions 2 4 2 b (locking protrusions) are arranged and formed point-symmetrically about the rotation axis L. I have. Each of the engaging arm portions 2 4 2 b cannot move in the circumferential direction in the two guide grooves 2 4 1 d formed in the left end surface of the contact member 2 4 1, but moves in the direction of the rotation axis L. Is inserted as possible. Thus, the locking member 242 is non-rotatably connected to the contact member 241 so as to be movable in the direction of the rotation axis L. The engagement arm portion 242b projects leftward from the main body portion 242a, and extends along the rotation axis L from the right end face of the bottom 21f of the first hinge member 21. Through hole (locking recess) 2 penetrated to the left end face of the mounting member 2 1 Are fitted so that they can move, but cannot move in the circumferential direction. Therefore, in a state where the engaging arm portion 242b is fitted into the through hole 21g, the locking member 242 and the contact member 241 cannot rotate with respect to the first hinge member 21. Become. Therefore, the movable portion 22B that abuts against the contact surface 2411a of the contact member 2411 also cannot rotate from the folded position toward the talking position, and the second hinge member 22 and the earpiece 3 Is fixed in the folded position. On the other hand, when the engaging arm portion 242b escapes from the through hole 21g, the locking member 242 and the contact member 241 become rotatable, and the second hinge member 221 and the second hinge member 242 become rotatable. The receiver 3 can rotate from the folded position to the call position.

The locking release means 25 is for releasing the locked state of the movable portion 22B at the folded position by the locking means 24. The pressing member (operation member) 251 and the operation button 2 are provided. Has 5 2

The pressing member 251, as shown in FIG. 2 to FIG. 5 and FIG. 8, has a ring-shaped main body 251a. The main body 25 1 a is slidably fitted on the outer peripheral surface of the left end of the first hinge member 21. Moreover, the hinge shaft 41 is prevented from falling to the left by hitting the head 41 a of the hinge shaft 41. On the right end face of the main body portion 25 1 a, two contact protrusions 25 1 b are formed. Each of the contact protrusions 25 1 b extends in parallel with the rotation axis L, and is arranged 180 ° apart in the circumferential direction. Preceding end of each contact protrusion 2 5 1 b is enters the first hinge member ² 1 a through-hole 2 1 g, the tip surface, the locking member 2 4 2 of the engagement arm 2 4 2 It hits the left end face of b. When the main body portion 25a is moved rightward until the main body portion 25a hits the left end surface of the first hinge member 21, the tip end surface of the contact protrusion 25 1 b becomes the step surface 2 of the first hinge member 21. It is flush with 1 d, and pushes the engagement arm portion 2 42 b out of the through hole 21 g of the first hinge member 21. As a result, the locking member 242 and the contact member 241 can be turned from the folded position to the talking position, and the second hinge member 224 and the earpiece 3 are turned by the rotation urging means 233. Is turned from the folding position to the talking position by the turning urging force. The position of the pressing member 25 1 when the main body 25 1 a comes into contact with the head 41 a of the hinge shaft 41 is the initial position, and the main body 25 1 a is the position of the first hinge member 21. The position when it hits the left end surface is the release position.

Here, the locking member 242 and the contact member 241 are point-symmetric with respect to the rotation axis L. As they are formed, they rotate 180 ° from the folded position and are in the same state as when they were in the folded position. That is, when the locking member 242 is rotated 180 ° from the folded position, the two engagement arms 242b can be respectively fitted to the respective through holes 21g of the first hinge member 21. become. However, the rotation angle of the receiver 3 from the folded position to the talking position is approximately 16.5 °. For this reason, if it is assumed that when the receiver 3 rotates from the folded position to the talking position, the locking member 242 rotates only by the same angle as the receiver 3, the locking member 242 is engaged. The arm 242 b cannot be fitted into the through hole 21 g when the earpiece 3 is rotated to the talking position. In the hinge device 10, when the earpiece 3 is located at the folding position, the arcuate portion 2d of the movable portion 22B is attached to the inclined surface 24141b of the contact member 2411. Since the movable portion 22B rotates from the folded position toward the talking position, the arc portion 22d moves downward (leftward) on the end cam 21b. When sliding, the arc portion moves downward while contacting the inclined surface 241b, thereby rotating the contact member 241 more largely than the movable portion 22B toward the talking position. The angle of rotation by the inclined surface 241b is set to be the same as the angle difference between the circumferential angle between the bending position and the talking position and 180 °. In the case of this embodiment, it is set to approximately 15 °. Therefore, when the receiving section 3 and the second hinge member 22 rotate from the folded position to the talking position by approximately 16.5 °, the contact member 2441 and the locking member 2422 rotate 1800 °. . As a result, the engaging arm portion 242b faces the through hole 21g. Therefore, when the locking member 242 is moved to the left by the return spring 243, the engaging arm 242b enters the through hole 21g.

At the tip (left end) of the engaging arm portion 242b, a chamfer 224c is formed. The chamfer 242c passes through the engaging arm portion 242b. This is to make it easier to enter the hole 2 1 g. With the movement of the locking member 2 42 to the left, the locking member 2 42 is turned from the folded position side to the talking position side. It is not for. Therefore, the chamfers 242c need not necessarily be formed.

As shown in FIGS. 2 to 5, the operation button 25 2 is fitted and fixed to the left end of the pressing member 25 1. Therefore, by pressing the operation button 25 2 to the right, the pressing member 25 1 can be moved to the right, whereby the locking means 24 The locked state of the movable portion 22B at the folded position can be released. As shown in FIG. 2, the right end of the operation member 25 2 is in the initial state in which the engagement arm portion 24 2 b of the locking member 24 2 has entered the through hole 21 g (the earpiece 3 is in the folded position). In the state when the wireless communication device is located at the position 2), it is inserted into the left end portion of the connecting tube portion 2 b of the transmitting portion 2. As a result, each member of the hinge device 10 other than the operation button 25 is invisible from the outside.

The receiving section 3 and the first hinge member 22 rotated to the talking position by the rotation urging means 23 are manually returned to the folded position against the urging force of the rotation urging means 23. Be moved. At the beginning of the return rotation, the arc portions 2 2 d and 2 2 d of the movable portion 2 2 B are in contact with the end cams 2 lb and 21 b, but the contact member 2 4 1 is in the middle of the return rotation. The contact surfaces 24 1 e and 24 1 e come into contact with the circumferentially extending return inclined surfaces 24 1 e and 24 1 e formed between the contact surfaces 24 1 a and 24 1 a of the end surfaces of the contact surfaces. The return inclined surfaces 2 4 e and 2 4 1 e are formed point-symmetrically with respect to the rotation axis L, and the inclination angle is set slightly larger than the inclination angle of the end surface force 21 b. The lower end of the return slope 2 41 e is set slightly lower than the lower end of the end cam 21 b, and the upper end of the return slope 24 1 e is set slightly higher than the upper end of the end cam 21 b. ing. Thus, during the return rotation of the receiver 3 from the talking position to the folding position, the arc 2d changes from the end surface force 21b to the return inclined surface 2411e. The return inclined surface 2 4 1 e may be formed so that the arc portion 2 2 d slides from the beginning of the return rotation of the receiver 3. When the earpiece 3 is returned to the front of the folded position by a predetermined angle (approximately 10 in this embodiment as described above), the arc 2 2 d comes into contact with the inclined surface 2 4 1 b. become. As a result, the urging force of the coil springs 43A and 43B is converted into a rotational urging force. Then, the movable portion 22B is rotated and biased from the talking position side to the folding position side by the rotating biasing force, and the receiving section 3 is abutted against the transmitting section 2 and is maintained at the folding position. .

In this embodiment, a flat surface 2 41 f having a constant height (position in the direction of the rotation axis L) is formed between the return inclined surface 2 41 e and the inclined surface 2 41 b. However, this plane 2 41 f need not necessarily be formed.

Next, the second hinge portion 30 will be described. As shown in Figs. 2 to 5, The two hinge portions 30 have first and second engaging members 31 and 32 each having a disc shape. The first engagement member 31 is rotatably fitted on the outer peripheral surface of the small diameter portion 41 c of the hinge shaft 41. A keyway 31 a is formed on the outer peripheral surface of the first engagement member 31. By fitting a key portion (not shown) formed on the inner peripheral surface of the connecting cylindrical portion 3c of the receiving portion 3 into the key groove 31a, the first engaging member 31 is fitted to the receiving portion 3. It is connected so that it cannot rotate. Moreover, the first engagement member 31 is prevented from moving rightward by abutting the retaining ring 43. On the other hand, the second engaging member 32 is rotatably fitted to the outer peripheral surface of the right end portion of the tubular member 42 and is fitted to the outer peripheral surface of the right end portion of the second hinge member 22. As described above, the key portion 32 a is formed on the outer peripheral surface of the second engagement member 32, and the key portion 32 a is engaged with the body portion 22 A of the second hinge member 22. The second engagement member 32 is not rotatable in the main body 22 A by being fitted into the stop groove 22 a so as to be movable in the direction of the rotation axis L and non-rotatably, and is not rotatable in the direction of the rotation axis L. It is connected so that it can move in the direction. The second engaging member 32 is urged toward the first engaging member 31 by coil springs 43 A and 43 B, and is connected to the first engaging member 31 via spheres 33 and 34 described later. 3 One is hitting.

As shown in FIGS. 4 and 13, on the left end face of the first engagement member 31 facing the second engagement member 32, a pair of first engagement recesses 3 1 b and 3 1 c is formed, and a pair of second engagement recesses 31 d and 31 e are formed. Each of the engagement recesses 31b to 31e is defined by a part of a spherical surface having the same size. The first engagement concave portions 31b and 31c are arranged at a distance of approximately 1650 in the circumferential direction. In other words, the receiving unit 3 is disposed at a position separated by almost the same angle as the rotation angle from the folded position to the talking position. The left end face of the first engagement member 31 between the first engagement recesses 3 1 b and 31 c extends circumferentially around the axis (rotation axis L) of the first engagement member 31, A first guide recess 31 f connecting the first engagement recesses 31b and 31c is formed. The second engagement recesses 3Id, 31e are also arranged at a distance of approximately 1650 in the circumferential direction, similarly to the first engagement recesses 31b, 31c. Moreover, they are arranged at a predetermined angle Θ (approximately 15 degrees in this embodiment) with respect to the first engagement concave portions 31b and 31c in the circumferential direction. As a result, the first engagement four portion 31b and the second engagement HO portion 31e are spaced apart 180 degrees in the circumferential direction, and the first engagement recess 31c and the second engagement recess 31d are separated from each other. Is 180 in the circumferential direction. is seperated. Also, The second engagement recesses 3 ld, 31 e are arranged slightly inward from the first engagement recesses 31 b, 31 c, and are oblique to the second engagement recesses 31 d, 31 e. The outer portion intersects the diagonally inner portion of the adjacent first engagement recesses 3 1 b and 3 1 c, respectively. The left end surface of the first engaging member 31 between the second engaging concave portions 31 d and 31 e extends circumferentially around the axis (rotation axis L) of the first engaging member 31.ぴ, a second guide recess 31g connecting the second engagement recesses 31d and 31e is formed.

As shown in FIG. 3, FIG. 4 and FIG. 5, mounting recesses 3 2 b and 32 c are formed on the right end face of the second engagement member 32 facing the first engagement member 31. I have. The mounting recesses 32 b and 32 c are arranged 180 ° apart in the circumferential direction of the second engagement member 32. One mounting recess 32b is disposed on the same circumference as the first engagement recesses 3lb and 31c. The other mounting concave portion 32c is arranged on the same circumference as the second engaging concave portion 3Id, 31e. The spheres 33, 34 are fitted and fixed to the mounting recesses 32b, 32c, respectively, with parts thereof protruding. Instead of mounting the spheres 33, 34 in the mounting recesses 32b, 32c, a spherical projection is integrally formed on the surface of the second engaging member 32 facing the first engaging member 31. May be.

When the earpiece 3 is located at the folding position, the sphere 33 attached to the attachment recess 32 b has its center positioned at the center of curvature of the first engagement recess 31 b and the first guide recess 31. The sphere 34 attached to the mounting recess 32 c is shifted by a predetermined angle (approximately 5 ° in this embodiment) to the f side, and the center of the sphere 34 is attached to the second engaging recess 31 e. It is shifted to the second guide recess 31g side by the same angle with respect to the center of curvature. Therefore, when the earpiece 3 is located at the folded position, as shown in FIG. 13D, the sphere 33 is the first of the bottom surfaces defining the first engagement recess 31b. The spherical body 34 is in contact with the inclined portion on the second guide portion 31g side of the second engagement concave portion 31e while being in contact with the inclined portion on the guide concave portion 31f side. As a result, the urging forces of the coil springs 43A and 43B that urge the second engagement member 32 toward the first engagement member 31 are converted into rotational urging forces. The first urging member 31 is rotationally biased from the talking position side toward the folding position side by the rotational urging force. As a result, the receiver 3 is maintained at the folded position where the receiver 3 abuts the transmitter 2.

The biasing force of the coil springs 43A and 43B is applied to the first and second engagement recesses 31b and 31b. e is converted into a rotational urging force by the inclined portion of e and the spheres 33, 34, and the first urging member 31 is rotationally urged from the talking position to the folding position by the rotational urging force. As a result, the second engaging member 32 is pivotally biased from the folded position side to the talking position side by the reaction force, and the second hinge member 22 is pivotally biased from the folded position side to the talking position side. . However, the rotation of the second hinge member 22 from the folded position to the talking position is prevented by the locking means 24. Therefore, the second engagement member 32 and the second hinge member 22 do not rotate toward the talking position.

In the state where the hinge device 10 is assembled to the mobile phone 1, when the earpiece 3 is located at the folded position, the centers of the spheres 33, 34 are in the first engagement recess 31b and in the first engagement recess 31b. 2 Engagement recess 3 Although it is displaced in the circumferential direction from the center of curvature of 1 d, when the hinge device 10 is handled as a unit before being assembled to the mobile phone 1, the spheres 3 3, 3 4 each center coincides respectively with each center of curvature of the first engagement recess 3 1 b and the second engagement recess 3 1 _e, that this shall first, second engagement member 3 1, 3 2 are integrated ing.

When the earpiece 3 is located at the talking position, the center of the sphere 33 is positioned with respect to the center of curvature of the first engagement recess 3 1 c when the earpiece 3 is located at the folding position. Is shifted toward the first guide recess 31 f by the same angle as the angle offset from the center of curvature of the first engagement recess 31b, and the center of the sphere 34 is Similarly, it is shifted from the center of curvature of the engaging concave portion 31d. Therefore, the spheres 33 and 34 come into contact with the inclined portions on the bottom surfaces of the first engagement concave portion 31c and the second engagement concave portion 31d, respectively. As a result, the urging force of the coil springs 43A and 43B is converted into a rotational urging force, and the first urging member rotates the first engaging member 31 from the folding position to the talking position. It is energized and the receiver 3 is maintained in the talking position.

Next, the operation of the mobile phone 10 having the above configuration will be described with reference to FIG. Now, it is assumed that the receiver 3 is located at the folding position. In this state, push the operation button 2 52 to the right in FIG. 1 to disengage the engaging arm 2 4 2 b of the locking member 2 42 from the through hole 2 1 g of the first hinge member 21. . Then, the locked state of the movable portion 2 2 B by the contact member 24 1 is released. As a result, the rotation urging force of the rotation urging means 23 is transmitted to the second engagement member 32 via the movable part 22B and the main body part 22A. And transmitted to the first engaging member 31 via the spheres 33, 34, and transmitted from the first engaging member 31 to the earpiece 3. Here, the rotation urging force of the rotation urging means 23 is such that the spheres 33, 34 and the inclined portions of the engagement recesses 31b, 31e are formed by the coil springs 43A, 43B. Therefore, it is set to be smaller than the maximum rotational urging force generated by being brought into pressure contact. Therefore, when the rotation urging force of the rotation urging means 23 is transmitted from the second engagement member 32 to the first engagement member 31 via the spheres 33, 34, the spheres 33, The second engagement member 32 rotates from the folded position to the talking position side integrally with the first engagement member 3 # without the 34 coming out of the engagement recesses 3 1b and 3 1e. Therefore, the earpiece 3 non-rotatably connected to the first engagement member 31 can also be surely turned to the talking position side. The receiver 3 rotates to the talking position and stops. The rotation urging force of the rotation urging means 23 acts on the receiver 3 even after the receiver 3 reaches the talking position. Therefore, the receiver 3 is maintained at the call position.

When the receiver 3 rotates from the folded position to the talking position, the contact member 2 41 and the locking member 2 42 are moved by the rotation urging means 23 to the second hinge member 2 2 (movable portion 2 2). It is turned from the folded position to the call position side together with Α). Here, the rotation angle of the second hinge member 22 is 1650 °, which is smaller than 180 °. However, when the second hinge member 22 rotates toward the talking position, the arcuate portion 2 2 d of the movable portion 22 摺 slides the inclined surface 24 lb downward (to the left in FIG. 2). As a result, the contact member 241 and the locking member 242 are rotated from the folded position side to the talk position side with respect to the second hinge member 22. The rotation angle is the rotation angle of the second hinge member 22 (the rotation angle of the receiver 3) and 180. And the angle difference between the two. In other words, in this embodiment, 180 ° -165. = 15 °. Therefore, the contact member 241 and the locking member 2442 rotate 180 ° while the second hinge member 22 (the earpiece 3) rotates from the folded position to the talking position. Then, the two through holes 21g and 21g of the first hinge member 21 and the two engaging arms 2442 and 2442 of the locking member 2442 are centered on the rotation axis L. The engaging arm portion 242b faces the through hole 2lg as in the case where the locking member 242 is located at the initial position (folded position). Thereafter, the locking member 2422 is moved leftward by the return spring 243, and the engaging arm portion 242b is fitted into the through hole 21g. As a result, the locking member 24 2 becomes the same state as the initial state, and the contact member 2 41 and the locking member 2 42 cannot rotate with respect to the first hinge member 21.

The receiver 3 rotated to the talking position by the rotation urging means 23 is manually returned and rotated to the folding position. When the receiver 3 is turned to the folded position, the turning power is transmitted to the second engaging member 32 via the first engaging member 31, and further transmitted to the second hinge member 2. At this time, the second hinge member 2 is engaged with the force S which is rotationally biased from the folding position side to the talking position side by the rotational biasing means 23, and the spheres 33, 34 are engaged as described above. The force for integrating the first engagement member 31 and the second engagement member 32 caused by entering the recesses 3 1 b and 3 1 e is greater than the rotation urging force of the rotation urging means 23. Is set. Therefore, when the earpiece 3 is rotated toward the folding position, the first and second engagement members 31 and 32 rotate in the same direction as the body, and the second hinge member 22 Rotate in the same direction against the rotational urging force of the rotational urging means 23. As a result, the arc portion 2 2d of the movable portion 2 2B slides upward (to the right in FIG. 2) on the return inclined surface 24 le from the end face cam 21b. When the earpiece 3 is rotated to a position slightly before the folding position (a position about 10 ° before), the arc portion 2 2 d is brought into contact with the inclined surface 2 4 1 b of the contact member 2 41. Become. As a result, coil spring 4

The urging force of 3 A and 43 B is converted into a rotational urging force, and the receiving unit 3 is rotated to the folded position by the rotational urging force. In addition, this rotational urging force acts on the receiver 3 even after the receiver 3 reaches the folded position. Therefore, the receiver 3 is maintained in the folded position.

The receiver 3 can also be manually turned from the folded position to the talking position. When the receiver 3 is turned from the folded position to the talk position, the coil spring

Rotation of the urging force of 4 3 A and 4 3 B converted by the spheres 3 3 and 3 4 and the slopes on the bottom surface of the first engagement recess 3 1 b and the second engagement recess 3 1 e Rotate the receiver 3 to the call position side against the urging force. Of course, at this time, the force for rotating the earpiece 3 is applied to the second engaging member 32 and the second hinge member 22 via the first engaging member 31 by the second hinge member 22. Since it is non-rotatably connected to the first hinge member 21 via the contact member 24 1 and the locking member 24 2, the second engagement member 32 and the second hinge member 22 Does not rotate in the same direction as the receiver 3 rotates toward the call position. Receiving When the talk part 3 is rotated from the folded position by a predetermined angle (for example, about 10 °) to the talking position side, the spheres 33, 34 are brought into contact with the first engagement recess 31 b and the second engagement recess 3. Exit from 1 e. As a result, the rotation urging force does not act on the receiver 3. Instead, the spherical bodies 33, 34 are pressed against the first and second guide grooves 31f, 31g, respectively, so that frictional resistance is generated. This frictional resistance tries to prevent the rotation of the receiver 3. Therefore, the receiver 3 rotates to the talking position side against the frictional resistance, and while the spheres 3 3, 3 4 are in the guide grooves 3 1 f, 3 1 g, the frictional force is increased. The receiver 3 can be stopped at any position by resistance. When the receiver 3 is rotated by a predetermined angle (for example, about 10 °) with respect to the call position to a position in front of the receiver, the spheres 33 and 34 are moved to the first engagement recesses 31 c and the second Engage into the engagement recess 3 1 d. As a result, the urging force of the coil springs 43A and 43B is converted to a rotational urging force, and the receiving unit 3 is rotated to the folded position by the rotational urging force and is maintained at the same position. You.

To rotate the receiver 3 manually rotated to the talking position to the folding position, first, the receiver 3 is first rotated by the coil springs 43A, 43B, the sphere 33, 3 4 and the engagement recesses 3 1 c 3 1 d Rotate the spheres 3 3 and 3 4 from the engagement recesses 3 1 c and 3 I d by rotating them by a predetermined angle against the urging force of 3 d. Into the first and second guide grooves 31 f and 31 g. After that, the receiver 3 is piled on the frictional resistance and rotated by a predetermined angle from the folding position to a position in front of the folding position. When the earpiece 3 reaches the position just before the folding position by a predetermined angle, the earpiece 3 is thereafter moved by the coil springs 43A, 438, the spheres 33, 34 and the first and second engagement recesses 31. Rotated to the folded position by the biasing force of b, 3 le, and maintained at the same position.

As described above, in this hinge device 10, the engaging arm portion 242 b of the locking member 242 is fitted into the through hole 21 g of the first hinge member 21, and They are engaged with the ends of the members 241 and do not engage with their inner and outer peripheral surfaces. Therefore, the diameter of the first hinge member 21 cannot be increased. Therefore, it is possible to prevent the hinge device 10 from increasing in size.

Further, in the conventional hinge device, the return spring 243 is used not only for moving the locking member 242 but also for rotating the contact member 241. Therefore, the biasing force of the return spring 243 had to be relatively strong. If the urging force of the return spring 243 is increased, the locking member 242 cannot be moved lightly, and it becomes difficult to perform the pressing operation of the operation button 252 lightly. In this regard, in this hinge device 10, the return spring 243 is not used for rotating the contact member 241 but is used only for moving the engagement member 242. Have been. Therefore, the urging force of the return spring 243 can be reduced. Therefore, the operation button 25 2 can be pressed lightly.

Note that the present invention is not limited to the above embodiment, and 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, but the hinge device 10 can also be used for a notebook personal computer or the like.

In addition, the second hinge member 22 is attached to the main body 22 A and the end of the main body 22 A on the first hinge member 21 side so that it cannot rotate and can move in the direction of the rotation axis L. Although the movable section 22B is provided, the main section 22A and the movable section 22B may be formed integrally. In this case, the entire second hinge member 22 may be movable in the direction of the rotation axis L. '

In addition, the second hinge member 22 is connected to the receiver 3 via the second hinge portion 30 (the second engagement member 32 and the first engagement member 31). It may be directly connected to part 3. That is, the second hinge portion 30 does not necessarily need to be provided. Further, a cam surface (the end face cam 21b and the concave portion 21) for converting the urging force along the rotation axis L of the coil spring (linear motion urging means) 43A, 43B into the rotational urging force. (the bottom surface of c) may be formed on the second hinge member 22 forming a force on the first hinge portion neo 21. Industrial potential ''

INDUSTRIAL APPLICABILITY The hinge device according to the present invention can be used as a hinge that can rotate two articles such as a transmitting section and a receiving section of a mobile phone, and can rotate two articles by one-touch operation. is there.

Claims

The scope of the claims

1. A first hinge member disposed on a rotation axis, and a first hinge member disposed on the rotation axis so as to face the first hinge member. A second hinge member rotatable between the second position and the second position; a rotation urging means for rotating the second hinge member from the first position to the second position; and the second hinge Locking means for locking the member at the first position against the rotation urging force of the rotation urging means; and locking for releasing the locked state of the second hinge member by the locking means. In a hinge device having a release means,

A locking recess is formed in the first hinge member in the rotation axis direction,

The locking means is arranged between the first hinge member and the second hinge member so as to be rotatable about the rotation axis, and the second hinge member is moved from the first position to the second hinge member. A contact member having a contact surface that abuts on the second hinge member when pivoting to the position 2; and an end of the contact member on the first hinge member side that cannot rotate. A locking member movably connected in the direction of the rotation axis and having a locking projection that is removably engaged with the locking recess; and the locking member is connected to the first hinge member from the second hinge member side. And return biasing means for biasing the hinge member side,

The lock release means is arranged movably in the rotation axis direction on the opposite side of the lock member with the first hinge member therebetween, and moves in a direction approaching the first hinge member. A hinge device comprising an operating member provided with an abutment projection that, when pressed, enters the locking recess and separates the locking projection from the locking recess.

2. The first hinge member is formed as a cylindrical body having an opening at the end on the side of the second hinge member and a bottom at the opposite end, wherein the bottom of the first hinge member has the locking member. A through hole serving as a recess is formed, and the locking member and the contact member are sequentially rotatably inserted into the first hinge member, and the locking member facing the bottom of the first hinge member. The hinge device according to claim 1, wherein the locking projection is formed on a facing surface of the member.

3. The first position and the second position are separated from each other by an angle smaller than 180 ° in the circumferential direction about the rotation axis, When at least a part of the second hinge member on the side of the first hinge member is a movable part, the movable part cannot rotate with respect to the remaining part of the second hinge member, and the rotation axis direction Can be moved to

The rotation urging means for urging the movable portion along the rotation axis to abut on the first hinge member; a linear motion urging device; and the movable portion and the first hinge member. The linear force urging means is provided on at least one of the contact surfaces and converts the urging force of the linear motion urging means along the rotation axis direction into a rotation urging force centered on the rotation axis. A force-rotating surface for rotating the first hinge member side to the second position side as the second hinge member side moves to the first hinge member side;

In the first hinge member, a pair of the locking concave portions is provided in a point-symmetrical manner about the rotation axis,

The locking member is provided with a pair of the locking protrusions in a point-symmetrical manner with respect to the rotation axis. Each time it rotates by 80 °, it faces the pair of locking recesses, and when the locking member is moved toward the first hinge member by the return urging means, the locking member comes out of the pair of locking recesses. When the pair of locking projections are fitted into the pair of locking recesses, and the second hinge member is located at the 'first position', The contact surface abuts against the movable portion to prevent the movable portion from rotating from the first position to the second position,

The operating member is urged by the return urging means in a direction from the second hinge member side to the first hinge member side via the locking member, and is moved to the initial position and the initial position. On the other hand, the operation member is movable between a release position separated from the first hinge member side and the second hinge member side, and the operation member opposes the urging force of the return urging means. When the locking member is moved from the initial position to the release position, the locking member is moved against the biasing force of the return biasing means until the pair of locking protrusions comes out of the pair of locking recesses. The return biasing means causes the return movement from the release position to the initial position via the locking member,

A contact surface of the contact member has an inclined surface on which the movable member slides when the movable portion moves from the second hinge member side to the first hinge member side; When the movable portion rotates from the first position to the second position and moves from the second hinge member side to the first hinge member side, the first and second positions The contact member is rotated from the first position side toward the second position side by an angle difference between 180 ° and the angle in the circumferential direction between the contact members. 2. The hinge device according to claim 1, wherein the hinge device is a hinge device.

4. The second hinge member has a main body portion as the remaining portion fixedly disposed on the rotation axis, and an end of the main body portion on the first hinge member side. 4. The hinge device according to claim 3, wherein the movable portion formed separately from the main body portion is connected so as not to rotate and to be movable in the rotation axis direction.

5. The inclined surface is arranged so as to come into contact with the movable portion when the movable portion rotates from the second position by a predetermined angle to a position short of the first position. The hinge device according to claim 3.