KR20090097949A - Hinge device and portable device - Google Patents

Abstract

A hinge device having a damping function that can be easily enabled and disabled. A movable cam (9) and a shaft body (7) are received in a tube body (6). The movable cam (9) is received in the tube body (6) so as to be slidable in the direction of the axis of the tube body (6) but not rotatable. The shaft body (7) is received in the tube body (6) so as to be rotatable about the axis of the tube body (6) but not slidable in the direction of the axis. A cam section (9c) of the movable cam (9) and a contact section (11) of the shaft body (7) face each other, and a sliding motion of the movable cam (9) and a rotation motion of the shaft body (7) are associated with each other. A through-hole (9b) extending in the direction of the axis of the tube body (6) is formed in the movable cam (9), and a shaft section (7b) penetrating through the through-hole (9b) of the movable cam (9) is provided on the shaft body (7). First and second chambers (S1, S2) inside the tube body (6) partitioned by the movable cam (9) are filled with a viscous fluid (20). Between the shaft section (7b) of the shaft body (7) and the movable cam (9) is provided a fluid passage (P) for leading the viscous fluid (20) from either of the first and second chambers (S1, S2) to the other.

Description

HINGE DEVICE AND PORTABLE DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge device in which a shaft accommodated in a cylinder can rotate relatively to a cylinder, in particular, when the relative rotation angle of the shaft with respect to the cylinder becomes greater than or equal to a predetermined angle, or less than or equal to a predetermined angle. A hinge device is provided with a damper function for braking the rotation of the motor.

In portable devices, such as a mobile telephone and a portable game machine, the operation side housing in which a key button is arranged, and the display side housing in which display devices, such as a liquid crystal display device, are arrange | positioned are connected so that opening and closing can be carried out via a hinge apparatus.

In order to facilitate opening and closing of the portable device, a hinge device is known in which when the portable device is slightly opened from the closed state, it is automatically opened completely at once by the spring force of the coil spring (see Patent Document 1, for example). As shown in FIG. 32, in the fixed cylinder 131, the cam part 132a of the movable cam 132 and the contact part 133a of the rotating shaft 133 are arrange | positioned facing each other. The movable cam 132 can slide in the axial direction with respect to the fixed cylinder 131. The rotating shaft 133 may rotate about the fixed cylinder 131. The coil spring 134 presses the movable cam 132 to the contact portion 133a of the rotation shaft 133. The pressing force of the movable cam 132 is converted into a rotation force for rotating the rotating shaft 133 by the cam portion 132a and the contact portion 133a.

The fixing cylinder 131 is fixed to either the operation side housing or the display side housing. The rotating shaft 133 is fixed to the other side of the operation side housing or the display side housing. When the display side housing is slightly opened manually from the closed state with respect to the operation side housing, the lock of the rotating shaft 133 and the movable cam 132 is released, and the display side housing is automatically opened at once until full opening.

If the display side housing is strongly opened relative to the operation side housing, an impact occurs when the display side housing is fully opened. In order to alleviate this shock, the hinge device is provided with an actuator 135 functioning as a damper. The actuator 135 rotates together with the rotating shaft 133 when the rotating shaft 133 is rotated by a predetermined angle with respect to the fixed cylinder 131 and slides with respect to the fixed cylinder 131. At this time, a friction force is generated between the actuator 135 and the fixed cylinder 131. This frictional force resists rotation of the rotating shaft 133.

However, when a frictional force is used, a large stable braking force is not obtained. Patent Document 2 discloses a hinge device that functions as a damper as a damper as shown in FIG. 33 as another example of a damper. This hinge device is used to rotatably connect the toilet seat to the toilet bowl. Attempting to close an open toilet seat rotates the toilet seat by its own weight. The braking force is applied to the rotation of the toilet seat when the toilet seat rotates more than a predetermined angle and approaches the toilet seat.

In the fixed cylinder 141, the movable cam 142 is provided slidably in the axial direction. An O-ring 143 is provided around the movable cam 142 so that the movable cam 142 moves like a piston in the fixed cylinder 141. Viscous fluid is filled in the first and second chambers S1 and S2 in the fixed cylinder 141 partitioned by the movable cam 142. On the inner circumferential surface of the fixing cylinder 141, a bypass groove 141a extending in the axial direction is formed. When the rotational angle of the rotation shaft 144 is less than the predetermined angle, that is, when the amount of movement from the left side to the right side of the movable cam 142 is small, the O-ring 143 of the movable cam 142 is located on the bypass groove so that the viscous fluid Flows into the second chamber S2 from the first chamber S1 via the bypass groove 141a. At this time, the viscous fluid cannot be very resistant to movement in the axial direction of the movable cam 142. On the other hand, when the rotation angle of the rotation shaft 144 is equal to or greater than the predetermined angle, that is, when the O-ring 143 of the movable cam 142 moves from the left to the right to the position deviated from the bypass groove 141a, the viscous fluid is the bypass groove. Since it cannot pass through 141a, it flows into the 2nd chamber S2 from the 1st chamber S1 via the orifice 145. FIG. Thus, the viscous fluid resists movement in the axial direction of the movable cam 142.

Patent Document 1: Japanese Patent Application Laid-open No. 2004-340209 (claim 1, Fig. 1)

Patent Document 2: Japanese Patent Application Laid-open No. Hei 10-331895 (claim 1, Fig. 6)

In the conventional hinge apparatus, a bypass groove 141a for bypassing the viscous fluid from the first chamber S1 to the second chamber S2 is provided on the inner circumferential surface of the fixing cylinder 141. Then, the damper is made to function or is not made to function depending on the position of the O-ring 143 when the movable cam 142 slides.

However, the stroke of the movable cam 142 is originally small. In particular, since the hinge device incorporated in the portable device is compact, the stroke of the movable cam is further reduced. It is difficult to make or prevent the damper from functioning within a small stroke of the movable cam. In addition, as described in Patent Document 2, forming the bypass groove 141a in the fixing cylinder 141 becomes difficult to process, and when the fixing cylinder 141 is assembled into the housing, It may be deformed and the bypass groove 141a may be damaged.

Accordingly, it is an object of the present invention to provide a hinge device and a portable device in which the damper device is assembled, which makes it easy to function or disable the damper.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated. In addition, in order to make understanding of this invention easy, the reference numeral of an accompanying drawing is attached | subjected in parentheses, However, this invention is not limited to the form of illustration by this.

In order to solve the said subject, invention of Claim 1 slides in the axial direction of the said cylinder in the cylinder 6, 31, 51, 76 and the cylinder 6, 31, 51, 76 which have a cavity inside. Movable cams 9, 24, 34, 54, 78 having through holes 9b, 34b, 54e, and 78b extending in the axial direction, which are accommodated so as to be rotatable, and the cylinders 6, 31, A shaft 7, 23, 33, 52, 77 which is accommodated so as to be able to rotate around the axis of the cylinders 6, 31, 51, 76 and not slide in the axial direction in the 51, 76, and the shaft The movable cam 9 so that rotation around the axis of (7, 23, 33, 52, 77) and the slide in the axial direction of the movable cams 9, 24, 34, 54, 78 can be interlocked; , 24, 34, 54, 78 or cam portions 9c, 34d, 54c, 78c provided on one side of the shafts 7, 23, 33, 52, 77, and the movable cams 9, 24, 34, 54, 78) or of the shafts 7, 23, 33, 52, 77 The partitions provided on the right side and partitioned by the contact portions 11, 33b, 68, 88 in contact with the cam portions 9c, 34d, 54c, 78c and the movable cams 9, 24, 34, 54, 78 The fluid 20 filled in the first and second chambers S1 and S2 in the cylinders 6, 31, 51, and 76, and the through hole of the movable cams 9, 24, 34, 54, 78 ( Shaft portions 7b, 35, 53, 82, 91 penetrating 9b, 34b, 54e, 78b, the shaft portions 7b, 35, 53, 82, 91 and the movable cams 9, 24, 34, 54 , 78) to guide the fluid 20 filled in one of the first chamber S1 or the second chamber S2 to the other side, and at the same time, the shaft portions 7b, 35, 53, 82 A hinge device having a fluid passage P in which the movable cams 9, 24, 34, 54, 78 are relatively slide and / or rotate relative to 91 to change the resistance of the fluid 20. to be.

In the invention according to claim 2, in the hinge device according to claim 1, the shafts 7 and 52 and the shafts 7b and 53 are integrated.

In the hinge device according to claim 2, the invention described in claim 3 is characterized in that the fluid passage grooves 7b1 and 53b extend in the axial direction to the shaft portions 7b and 53 of the shafts 7 and 52 to constitute the fluid passage. ) Is formed, and the movable cams 9 and 54 slide relative to the shaft portions 7b and 53, and rotate relatively, so that the movable cams 9 and 54 are provided with the fluid passage grooves 7b1, 53b) to cover the end portion 21 in the axial direction.

In the invention according to claim 4, in the hinge device according to claim 3, the cam portions 9c and 54c are provided on the movable cams 9 and 54, and the contact portions 11 and 68 are provided on the shafts 7 and 52. ) Is provided, and the cam portions 9c and 54c are shifted in the circumferential direction by the inclined surfaces of the cam portions 9c and 54c in contact with the contact portions 11 and 68, and the concave portions 29a and 65 are convex. The portions 29b and 66 are formed, and the movable cams 9 and 54 are rotated relative to the shaft portions 7b and 53 so that the recesses 29a and 65 of the movable cams 9 and 54 are formed. When the fluid passage grooves 7b1 and 53b are positioned, the axial end portions 21 of the fluid passage grooves 7b1 and 53b are exposed, and the movable cam 9 with respect to the shaft portions 7b and 53b is exposed. Of the fluid passage grooves 7b1 and 53b when the convex portions 29b and 66 of the movable cams 9 and 54 come to the positions of the fluid passage grooves 7b1 and 53b. remind Characterized in that end 21 of the line direction is covered by the convex portion (29b, 66) of the movable cam (9, 54).

In the invention according to claim 5, in the hinge device according to any one of claims 1 to 4, the hinge device is further accommodated in the cylinders 6, 31, 51, and 76, and the movable cams 9, 24, It is characterized by including pressing means (8, 24, 25, 32, 56, 79, 80) for pressing 34, 54, 78 on the shafts (7, 23, 33, 52, 77).

The invention according to claim 6 is the hinge device according to any one of claims 2 to 4, wherein one end of the shaft portions 7b, 35, 53 has a bottomed cylindrical body 6, 31, It is characterized in that it is rotatably supported on the bottom surface of 51 and the shafts 7, 23, 33, 52 are rotatably supported on the open ends of the cylinders 6, 31, 51.

In the invention according to claim 7, in the hinge device according to any one of claims 1 to 6, the shaft (7) is provided with a pin (11) projecting in a direction orthogonal to the axis as the contact portion. do.

In the invention according to claim 8, in the hinge device according to claim 1, a small diameter portion 35a constituting the fluid passage P is formed in the middle of the axial direction of the shaft portion 35, and the shaft portion 35 The movable cam 34 slides relative to the movable cam 34 to cover the end portion 49 in the axial direction of the small diameter portion 35a.

In the invention according to claim 9, in the hinge device according to claim 8, the cam portion 34d is provided on the movable cam 34, the contact portion 33b is provided on the shaft 33, and the contact portion ( A recess 38 and a convex portion 37 are formed in the cam portion 34d by shifting the position in the circumferential direction by the inclined surface of the cam portion 34d in contact with 33b). When sliding toward the end portion 49 in the axial direction of the small diameter portion 35a, the movable cam 34 uses the shape of the concave portion 38 and the convex portion 37 to form the small diameter portion 35a. It is characterized by gradually closing the end of the).

In the hinge device according to claim 1, in the hinge device according to claim 1, the shape of the developed view of the cam portion 54c has the first and second inclined surfaces 63 and 64 on both sides of the top portion 61 and the top portion 61. And a resistance of the fluid in the fluid passage P when the contact portion 68 is in contact with the top portion 61 is formed in a mountain shape having a predetermined shape with the contact portion 68 spaced apart from the top portion 61. The second inclined surface that is smaller than the fluid resistance of the fluid passage P at the bottom of the first inclined surface 63 from the position, or the contact portion 68 is spaced from the top portion 61. It is characterized by being smaller than the fluid resistance of the fluid passage P at the bottom of 64.

In the hinge device according to claim 1, in the hinge device according to claim 1, the shape of the developed view of the cam portion 54c has the first and second inclined surfaces 63 and 64 on both sides of the top portion 61 and the top portion 61. And a resistance of the fluid in the fluid passage P when the contact portion 68 is in contact with the top portion 61 is formed in a mountain shape having a predetermined shape with the contact portion 68 spaced apart from the top portion 61. The second inclined surface (which is smaller than the fluid resistance of the fluid passage P at the bottom of the first inclined surface 63 from the position, and the contact portion 68 is spaced apart from the top portion 61). It is characterized by being smaller than the fluid resistance of the fluid passage P at the bottom of 64.

In the invention according to claim 12, in the hinge device according to claim 1, the shaft portions 82 and 91 are separate bodies from the shaft 77, and the movable cam 78 is the cylinder 76. It is characterized by being able to slide relative to the shaft (77) by using the pressure difference of the fluid filled in the first and the second chamber (S1, S2) generated by sliding in the axial direction of the. .

In the hinge device according to claim 12, in the hinge device according to claim 12, a fluid passage groove (82b) extending in the axial direction and constituting the fluid passage is formed in the shaft portion (82) so that the shaft portion (82) is the shaft body. By sliding relative to 77, the movable cam 78 covers the end portion 82b1 in the axial direction of the fluid passageway groove 82b.

In the invention according to claim 14, in the hinge device according to claim 12, a small diameter portion 91a constituting the fluid passage is formed in the axial direction of the shaft portion 91, and the movable cam with respect to the shaft portion 91. The movable cam 78 covers the end portion in the axial direction of the small diameter portion 91a by sliding 78.

In the invention according to claim 15, in the hinge device according to any one of claims 12 to 14, the shaft 77 has a hole 77c into which the end portion 82d of the axial direction of the shaft portion 82 is inserted. And an end portion 82d of the shaft portion 82 so as to fill the fluid in the hole 77c while the shaft portion 82 is inserted into the hole 77c of the shaft body 77. 82c is formed.

The invention according to claim 16 is a portable device in which the hinge device according to any one of claims 1 to 15 is assembled to a connecting portion between the first housing 1 and the second housing 2.

According to the invention of claim 1, a fluid passage for guiding fluid from one side of the first chamber or the second chamber to the other is formed between the shaft portion and the movable cam. Relative rotational and / or slide movements of the movable cams with respect to the shaft and movable cams with undulating cam shapes are used to vary the resistance of the fluid in the fluid passages, thereby making the damper functional or nonfunctional. It becomes easy. In addition, the fluid passage is not deformed even if the cylinder is deformed when the hinge device is installed in the housing by forming the fluid passage between the shaft portion and the movable cam.

According to the invention described in claim 2, the shaft portion can be rotated together with the shaft body.

According to the invention as set forth in claim 3, since the area in which the movable cam covers the end of the fluid passage groove of the shaft portion is changed, the resistance of the fluid in the fluid passage can be changed.

According to the invention as set forth in claim 4, the shape of the undulating cam portion can be used to change the area that the movable cam covers the end of the fluid passage groove of the shaft portion.

According to invention of Claim 5, the cam part of a movable cam can be pressed against the contact part of a shaft body.

According to invention of Claim 6, a shaft can be rotated stably.

According to invention of Claim 7, a contact part can be provided in the axial part of the shaft body which penetrates a movable cam.

According to invention of Claim 8, processing of a shaft part becomes easy by processing a small diameter part as a fluid passage | path to a shaft part.

According to invention of Claim 9, the edge part of the small diameter part of a shaft part can be gradually occluded using the shape of the concave part and convex part of the cam part of a highly undulating movable cam. For this reason, adjustment of a damper becomes easy only by the slide motion of a movable cam with respect to an axial part.

According to the invention as set forth in claim 10, when the contact portion passes through the top of the cam portion by the pressing force of the pressing means, the flow passage of the fluid passage is narrowed to generate a large damper force.

According to the invention as set forth in claim 11, the damper force can be generated even when the contact portion moves from the top to the first inclined surface side and also when moving to the second inclined surface side.

According to the invention as set forth in claim 12, the timing at which the damper functions can be changed when the shaft body rotates clockwise and counterclockwise with respect to the cylinder.

According to the invention as set forth in claim 13, the area in which the movable cam covers the end of the fluid passage groove of the shaft portion is changed, so that the fluid resistance of the fluid passage can be changed.

According to the invention as set forth in claim 14, since the area where the movable cam covers the end of the fluid passage groove of the shaft portion is changed, the fluid resistance of the fluid passage can be changed.

According to invention of Claim 15, when the shaft part is spaced apart from a shaft body, the inside of the hole of a shaft body can be prevented from becoming a vacuum state.

According to the invention as set forth in claim 16, the damper can be made to function or not to function when the portable device is opened or closed.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the mobile telephone with which the hinge apparatus of 1st Embodiment of this invention is assembled.

2 is an exploded perspective view of the mobile phone.

3 is a perspective view of a hinge device of the first embodiment of the present invention.

4 is an external view of the hinge device ((a) is a plan view, (b) is a front view, (c) is a bottom view, and (d) is a side view, respectively).

5 is a cross-sectional view of the hinge device.

6 is an exploded perspective view of the hinge device.

Fig. 7 is a diagram showing the relationship between the opening angle of the cellular phone, the position in the axial direction of the catch, and the rotation angle of the shaft.

8 is a cross-sectional view showing the relationship between the opening angle of the cellular phone and the volumes of the first and second chambers.

9 is a cross-sectional view of the hinge device of the second embodiment of the present invention.

10 is an exploded perspective view of the hinge device.

The perspective view of the hinge apparatus of 3rd embodiment of this invention.

12 is a cross-sectional view of the hinge device.

13 is an exploded perspective view of the hinge device.

It is a figure which shows the relationship of the opening angle of a mobile telephone, the position of the catch in the axial direction, and the rotation angle of a shaft.

Fig. 15 is a sectional view showing the relationship between the opening angle of the cellular phone and the volumes of the first and second chambers.

Fig. 16 is an external view of the hinge device according to the fourth embodiment of the present invention ((a) is a plan view, (b) is a front view, and (c) is a side view, respectively).

17 is a cross-sectional view of the hinge device.

18 is an exploded perspective view of the hinge device.

19 is a cam diagram of the catch.

Fig. 20 is a diagram showing a relationship between the opening angle of the cellular phone, the position in the axial direction of the catch, and the rotation angle of the shaft.

Fig. 21 is a sectional view showing the relationship between the opening angle of the cellular phone and the volumes of the first and second chambers.

The external appearance of the hinge apparatus of 5th Embodiment of this invention.

23 is an exploded perspective view of the hinge device.

24 is a cross-sectional view of the hinge device ((a) shows a state where the catch is raised, and (b) shows a state where the catch is lowered.)

25 is a detailed view of the shaft ((a) shows a plan view, (b) shows a side view, (c) shows a cross sectional view along line AA of (b), and (d) shows a bottom view). Shows].

Fig. 26 is a detailed view of the shaft portion ((a) shows a plan view, (b) shows a side view, (c) shows a front view, and (d) shows a bottom view).

27 is a view showing a state in which a shaft portion is fitted to a shaft (in the drawing, (a) shows a side view, (b) shows a cross-sectional view taken along line BB of (a), and (c) shows an exploded perspective view) .

Fig. 28 is a diagram showing the relationship between the opening angle of the mobile phone and the movement of the catch, shaft and shaft.

Fig. 29 is a diagram showing that the timing at which the damper operates when opening and closing the cellular phone is different;

The exploded perspective view which shows the hinge apparatus of 6th Embodiment of this invention.

Fig. 31 is a sectional view of the hinge device.

32 is a cross-sectional view of a conventional hinge device.

33 is a sectional view of a conventional hinge device.

<Code description>

1: Operation side housing (1st housing)

2: display side housing (second housing)

4: hinge device

6, 31, 51, 76: cylinder

7, 23, 33, 52, 77: shaft

7b, 35, 53, 82, 91: shaft portion

7b1, 53b, 82b: fluid passage

77e: pin through hole

8, 32, 56, 79, 80: coil spring (pressing means)

9, 24, 34, 54, 78: catch (moving cam)

35a, 91a: Small diameter part

9b, 34b, 54e, 78b: through hole

9c, 34d, 54c, 78c: cam part

11: pin (contact part)

20: viscous fluid (fluid)

21, 82b1: lower end of the fluid passage groove (end of the axial direction of the fluid passage groove)

29a, 38, 65: recessed portion

29b, 37, 66: convex

33b: cam part (contact part)

49: lower part of the small diameter portion

61: top part

63: first slope

64: second slope

68, 88: contact portion

P: fluid passage

S1: 1st room

S2: second room

EMBODIMENT OF THE INVENTION Hereinafter, the hinge apparatus in 1st Embodiment of this invention is demonstrated based on attached drawing. 1 shows a mobile phone in which a hinge device is assembled. The cellular phone includes an operation side housing 1 in which key buttons are arranged, and a display side housing 2 in which a display device 3 such as a liquid crystal display device is disposed. The operation side housing 1 is provided with a compact microphone and various key buttons. The display-side housing 2 is provided with a compact speaker and a liquid crystal display device 3.

At the end of the operation side housing 1, two connecting cylinder portions 1a are provided. These two connecting cylinder parts 1a are arrange | positioned at the both ends of the left-right direction of the operation side housing 1. The operation side housing 1 is divided into two parts, the split housing 1b on the front side where the key buttons are arranged and the split housing 1c on the back side. At the end of the display-side housing 2, one connection cylinder 2a fitted between two connection cylinders 1a of the operation-side housing 1 is provided. The center line of the connecting tube portion 1a of the operation side housing 1 and the center line of the connecting tube portion 2a of the display side housing 2 coincide with each other.

2 shows an exploded perspective view of the cellular phone. The display side housing 2 and the operation side housing 1 are connected to each other so as to rotate around the center line L via the hinge device 4. The hinge device 4 and the dummy hinge 5 are inserted into the connecting cylinder portion 2a of the display side housing 2 from both ends in the axial direction. On the outer surface of the cylinder 6 of the hinge apparatus 4, the flat surface 6a is formed. A flat surface corresponding to the flat surface 6a of the cylinder 6 is also formed in the connecting cylinder portion 2a. When the hinge device 4 is inserted into the connecting tube portion 2a, the flat surface 6a of the tube body 6 and the flat surface of the connecting tube portion 2a so that the cylinder 6 cannot rotate with respect to the connecting tube portion 2a. Is in contact. The dummy hinge 5 is cylindrical.

A part of the hinge apparatus 4 and the part of the dummy hinge 5 which protruded from the connection cylinder part 2a are inserted between the split housing 1b of a front side, and the split housing 1c of a back surface side. The flat surface 7a is formed in the shaft 7 of the hinge apparatus 4. A flat surface corresponding to the flat surface 7a of the shaft 7 is formed in the split housing 1b on the surface side. When the shaft body 7 of the hinge device 4 is placed between the split housing 1b on the front side and the split housing 1c on the back side, the split housing on the surface side is formed on the flat surface 7a of the shaft 7. The flat surface of 1b) is in contact. For this reason, the operation side housing cannot be rotated with respect to the shaft 7. Since the shaft 7 of the hinge device 4 rotates relative to the cylinder 6, the display side housing 2 eventually rotates relative to the operation side housing 1.

3 shows a perspective view of the hinge device 4, and FIG. 4 shows the hinge device 4 viewed from four different directions. In any of the drawings, the axis of the cylindrical hinge device 4 is directed in the vertical direction. The hinge apparatus 4 is provided with the cylindrical cylinder 6 provided with a bottom, and the shaft 7 accommodated in the cylinder 6. On the side surface of the cylinder 6, a pair of flat surfaces 6a parallel to each other are formed. This flat surface 6a extends to the middle from the upper end of the cylinder 6 toward the lower end. The head part 6c which narrowed the diameter is provided in the bottom part 6b (upper part in FIG. 3) of the cylinder 6. As shown in FIG. The cylinder 6 is manufactured by press working a thin plate-shaped metal.

The lower end of the shaft 7 protrudes from the lower end of the cylinder 6. A pair of flat surfaces 7a parallel to each other are formed in a portion of the shaft 7 protruding from the lower end of the cylinder 6.

FIG. 5 shows a cross-sectional view of the hinge device 4, and FIG. 6 shows a coil spring 8 serving as a pressing means, a catch 9 serving as a movable cam, and a shaft 7 in a cylinder 6 showing an exploded perspective view. Are accepted.

The coil spring 8 is interposed between the bottom part 6b of the cylinder 6 and the catch 9, and presses the catch 9 to the shaft 7.

As shown in FIG. 6, a pair of parallel flat surfaces 9a corresponding to the flat surfaces of the cylinder 6 are formed on the side of the catch 9. The flat surface 9a of the catch 9 and the inner surface of the cylinder 6 are in flat contact. For this reason, the catch 9 can slide with respect to the cylinder 6 in the axial direction of the cylinder 6, and cannot rotate around the axis of the cylinder 6. The catch 9 is formed with a through hole 9b extending in the axial direction. The shaft portion 7b of the shaft 7 penetrates the through hole 9b. At the lower end of the catch 9, a cam portion 9c having a cutout 9d is provided. In the cam portion, the inclined portion 29a and the convex portion 29b are formed by shifting the position in the circumferential direction by the inclined surface 9d. The cam part 9c is formed in point symmetry centering on an axis line.

The shaft 7 has a shaft portion 7b extending in the axial direction of the cylinder 6, a cam portion 7c facing the cam portion 9c of the catch 9, and a connecting shaft portion extending downward from the cam portion 7c. And 7d. The shaft portion 7b penetrates the through hole 9b of the catch 9. In the shaft portion 7b, a fluid passage groove 7b1 extending from the upper end portion to the middle of the shaft portion 7b is processed. The cam portion 7c corresponds to the cam portion 9c of the catch 9. This cam part 7c is also formed as a point object centered on an axis line. At the root of the shaft portion 7b, a pin through hole 7e extending in the direction orthogonal to the axis line is formed. The pin 11 which is a contact part is inserted in this through hole 7e. The pin 11 is in contact with the cam portion 9c of the catch 9. The cam portion 9c of the catch 9 and the pin 11 of the shaft 7 cooperate with the rotational movement of the shaft 7 and the slide movement of the catch 9. The flat surface 7a mentioned above is processed in the connection shaft part 7d.

The cam portion 7c may be separated from the shaft portion 7b and the connecting shaft portion 7d. In this case, the integrally formed shaft portion 7b and the connecting shaft portion 7d are inserted into the cam portion 7c in which the through hole is formed. The part of the cam part 7c and the connection shaft part 7d correspond to the shaft 7, and the part which protrudes toward the bottom part 6b of the cylinder 6 more than the cam part 7c corresponds to the shaft part 7b.

When inserting the shaft body 7 into the cylinder body 6, the shaft part 7b of the shaft body 7 passes through the through-hole 9b of the catch 9, and the shaft part 7b is made into the coil spring 8 inside. Pass it through. Then, the tip of the shaft portion 7b is fitted to the head portion 6c of the cylinder 6. After inserting the shaft 7 into the cylinder 6, the O-ring 12, the bearing 13, and the washer 14 are sequentially inserted in the outer circumference of the shaft 7. As shown in FIG. 5, the O-ring 12 is inserted into the outer circumference of the portion which forms a step below the cam portion 7c of the shaft 7, so that the viscous fluid 20 filled in the cylinder 6 leaks. Prevent it. The opening 13 is formed in the bearing 13 according to the cross-sectional shape of the connection shaft 7d. The bearing 13 and the washer 14 are inserted in the outer circumference of the connecting shaft portion 7d. After the washer 14 is inserted into the shaft 7, the open end of the cylinder 6 is bent inward to press the washer 14.

The shaft 7 can rotate around the axis of the cylinder 6, and cannot slide in the axial direction. The tip end of the shaft portion 7b of the shaft 7 is rotatably supported by the head portion 6c of the cylinder 6. The lower part of the shaft 7 is rotatably supported by the washer 14 provided in the open end of the cylinder 6 with the bearing 13 which rotates integrally with the shaft 7. Since the rotation of the shaft 7 is supported in two places above and below the cylinder 6, the shaft 7 rotates stably even when a load in the radial direction is applied to the shaft 7. The bearing 13 prevents the shaft 7 from swinging up and down.

By the catch 9, the internal space of the cylinder 6 is partitioned into the first chamber S1 and the second chamber S2 in the axial direction (see FIGS. 7 and 8). Each of the first chamber S1 and the second chamber S2 is filled with a viscous fluid 20.

FIG. 7: is a figure which shows the relationship of the opening angle of a mobile telephone, the position of the catch 9 in the axial direction, and the rotation angle of the shaft 7. In the figure, the upper part shows the opening angle of the cellular phone, the middle part shows the positional relationship between the catch 9 and the shaft 7, and the lower part shows the detailed view of the fluid passageway groove 7b1.

As shown in (a) of the figure, in the closed state of the cellular phone, the pin 11 of the shaft 7 is locked while being in contact with the rising inclined surface 16 of the catch 9. From this state, if the display side housing 2 is rotated slightly (for example, 20 degrees) by hand, the pin 11 of the shaft 7 is the uppermost part 17 of the rising inclined surface 16 of the catch 9. Sit up on. At this time, the catch 9 is slightly moving upward in the figure against the spring force of the coil spring 8 ((b) in the figure). When the pin 11 of the shaft 7 passes the top 17 of the inclined surface, the lock is released and the pin 11 moves to the descending inclined surface 18. In this case, the coil spring 8 slides the catch 9 downward in the figure by the spring force. The pin 11 rolls down the inclined surface 18 by the slide of the catch 9 in the downward direction, and the shaft 7 automatically rotates. That is, after passing through the conversion point shown in (b) in the figure, as shown in (c) to (e) in the figure, the cellular phone is automatically opened to full open. When the cellular phone is opened to full open, the catch 9 moves downward, and the pin 11 moves to the deepest bottom 19 of the descending slope 18.

Between the fluid passage groove 7b1 of the shaft portion 7b and the inner circumferential surface of the catch 9, a fluid passage P for guiding a viscous fluid from one of the first chamber S1 or the second chamber S2 to the other is provided. Formed (see FIG. 8). By the slide movement downward of the catch 9 and the rotational movement of the shaft 7, the fluid passage P changes the resistance of the fluid when inducing viscous fluid. That is, the fluid passage groove 7b1 constituting the fluid passage P is exposed to the first chamber S1 and also to the second chamber S2 when the opening angle is between 0 degrees and 90 degrees. Then, the fluid passage P connects the first chamber S1 and the second chamber S2, and on the other hand, when the opening angle exceeds 90 degrees, the lower end portion 21 in the axial direction of the fluid passage groove 7b1. Passes through the deepest bottom 19 of the inclined surface 18 of the catch 9 and begins to cover the catch 9. The lower end 21 of the fluid passage groove 7b1 is covered with the catch 9. The area is changed so as to gradually increase, and when the opening angle is 120 degrees, the entire lower end portion 21 of the fluid passageway groove 7b1 is closed by the catch 9. In other words, the lower end portion of the fluid passageway groove 7b1. The area where 21 is exposed in the second chamber S2 changes gradually to become smaller, and when the opening angle is 120 degrees, the lower end 21 of the fluid passage groove 7b1 is exposed in the second chamber S2. In this case, the fluid passage P cannot connect the first chamber S1 and the second chamber S2.

As described above, the fluid passage P connects the first chamber S1 and the second chamber S2 when the opening angle is between 0 degrees and 90 degrees. While the fluid passage P connects the first chamber S1 and the second chamber S2, the catch 9 slides upward or downward, so that the first chamber S1 and the second chamber ( Even if the volume of S2 is changed, the viscous fluid 20 passes from the first chamber S1 to the second chamber S2 or from the second chamber S2 to the first chamber S1 via the fluid passage P. To move smoothly. Thus, the damper does not function very much when the opening angle is between 0 degrees and 90 degrees. The catch 9 slides quickly downward, and the shaft 7 rotates quickly.

When the opening angle exceeds 90 degrees, the area where the lower end portion 21 of the fluid passage groove 7b1 is exposed in the second chamber S2 gradually decreases. As a result, the resistance of the fluid in the fluid passage P also gradually increases. In this case, when the catch 9 slides downward, the damper acts and it becomes difficult for the viscous fluid 20 to move from the second chamber S2 to the first chamber S1. The damper force gradually increases until the opening angle is 120 degrees. When the opening angle is between 90 degrees and 120 degrees, the damper acts gradually, so that the slide in the downward direction of the catch 9 is gradually decelerated, and the rotation of the shaft 7 is also gradually decelerated.

When the opening angle exceeds 120 degrees, the fluid passage P cannot connect the first chamber S1 and the second chamber S2. For this reason, when the catch 9 slides downward, the largest damper force generate | occur | produces. The damper acts until the opening angle is 170 degrees, which is fully open. At this time, the viscous fluid 20 is firstly separated from the second chamber S2 via a slight gap between the shaft 7 and the catch 9, or a slight gap between the catch 9 and the cylinder 6. Move to thread S1. When the opening angle is between 120 and 170 degrees, since the largest damper force is acting, the catch 9 slides slowly downward and the shaft 7 also rotates slowly.

When closing the cellular phone in the open state, the operation is reversed from the above operation. That is, first, it closes from 170 degrees to 20 degrees manually against the spring force of the coil spring 8. When it is 20 degrees or less, the cellular phone is automatically closed by the spring force of the rising inclined surface 16 and the coil spring 8. The damper functions when between 170 and 120 degrees and does not function when less than 120 degrees. Since the damper is functioning even when it is 170 degrees when it is fully open, it is easy to maintain a fully open state.

FIG. 8 shows how the volumes of the first and second chambers S1 and S2 change according to the opening angle of the cellular phone. In all the drawings of (a)-(e), the shaft 7 is made into the cross section where the fluid passage groove 7b1 exists. As the opening angle becomes from 0 degrees to 20 degrees, the volume of the first chamber S1 is reduced, and the volume of the second chamber S2 is increased. As the opening angle increases from 20 degrees to 90 degrees, the volume of the second chamber S2 is reduced, and the volume of the first chamber S1 is increased. The fluid passage P connects the first chamber S1 and the second chamber S2 between the opening angles of 0 degrees to 90 degrees. When the opening angle is 90 degrees to 120 degrees, the lower end portion 21 of the fluid passage groove 7b1 is gradually covered by the catch 9, and the resistance of the fluid in the fluid passage P also gradually increases. When the opening angle is 120 degrees to 170 degrees, the lower end 21 of the fluid passageway groove 7b1 is completely covered by the catch 9 so that the fluid passage P covers the first chamber S1 and the second chamber S2. It will not connect.

According to the present embodiment, the fluid passage P for guiding fluid from one of the first seals S1 or the second seal S2 to the other is the fluid passage groove 7b1 of the catch 9 and the shaft portion 7b. It is formed between. It is possible to change the resistance of the fluid in the fluid passage by using the rotational movement of the shaft portion 7b and the slide movement of the catch 9, and also by using the cam shape of the highly undulating catch. It is easier to do or to not.

In addition, when the bypass groove is formed in the cylinder as described in Patent Literature 2, when the external force acts on the cylinder and is deformed, there is a possibility that the bypass groove is also blocked and the function cannot be achieved. According to this embodiment, since the fluid passage groove 7b1 is formed in the shaft 7, even if the cylinder 6 is deformed, there is a low risk that the fluid passage P will not function. Further, as described in Patent Document 2, if a bypass groove is formed on the inner circumferential surface of the cylinder, the machining of the cylinder becomes difficult. In the present embodiment, as shown in FIG. 7, the damper is actuated while the catch 9 moves downward. For example, when the bypass groove is formed in the cylinder 6, the bypass groove is formed in the cylinder 6. Since it is necessary to be formed inside the side), processing of the bypass groove becomes more difficult. According to this embodiment, since the fluid passage groove 7b1 is formed in the outer peripheral surface of the shaft 7, processing becomes easy.

9 and 10 show the hinge device of the second embodiment of the present invention. In this embodiment, the point in which the coil spring 8 which presses the catch 24 to the shaft 23 is not provided is different from the hinge apparatus of 1st Embodiment. Instead of the coil spring 8, the other pin 25 is provided in the shaft. First and second cam portions 24a and 24b are provided on the upper and lower surfaces of the catch 24. The inclined surface of the first cam portion 24a has the same shape as the inclined surface of the second cam portion 24b, and the distance between these inclined surfaces is constant. A pair of through holes 23a and 23b are formed in the shaft 23 up and down, and the first and second pins 26 and 25 are inserted into the pair of through holes 23a and 23b, respectively. The first and second pins 26 and 25 sandwich the catch 24 in the vertical direction. When the shaft body 23 is rotated with respect to the cylinder 6, the catch 24 slides in an up-down direction. Since the slide in the vertical direction of the catch 24 is restricted by the first and second pins 26 and 25, the catch 24 moves as in the case where the coil spring 8 presses the catch on the shaft. . Since the structure of the O-ring 12, the bearing 13, and the washer 14 is the same as that of the hinge apparatus of 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

Thus, instead of the coil spring 8, you may interpose the catch 24 with the 1st and 2nd pins 26 and 25. However, without the coil spring 8, it cannot be opened automatically. Therefore, the hinge apparatus of this embodiment is used for the connection part of the toilet seat and the toilet lid on which the force which rotates by the weight of the toilet seat acts rather than a portable device.

11 shows a perspective view of a hinge device of a third embodiment of the present invention. The hinge device of this embodiment is assembled between the connection cylinder part 1a of the operation side housing 1 of the mobile telephone, and the connection cylinder part 2a of the display side housing 2 similarly to the hinge device of the first embodiment. On the outer surface of the cylinder body 31 of the hinge apparatus, the flat surface 31a is formed so that the cylinder body 31 may not rotate around the center line with respect to the connection cylinder part 2a of the display side housing 2.

12 shows a sectional view of the hinge device, and FIG. 13 shows an exploded perspective view of the hinge device. In the bottomed cylindrical body 31, the coil spring 32 which is a press means and the catch 34 which is a movable cam are accommodated. The coil spring 32 is interposed between the bottom part 31b of the cylinder 31 and the catch 34, and presses the catch 34 to the shaft 33. The shaft 33 of this embodiment is separated from the shaft 35.

13 shows an exploded perspective view of the hinge device. On the side surface of the catch 34, a pair of parallel flat surfaces 34a corresponding to the flat surfaces of the cylinder 31 are formed. Since the flat surface 34a of the catch 34 and the inner surface of the cylinder 31 are in flat contact, the catch 34 can slide in the axial direction of the cylinder 31 with respect to the cylinder 31, and the cylinder 31 Cannot rotate around the axis. The catch 34 divides the space in the cylinder 31 into the 1st chamber S1 and the 2nd chamber S2. The catch 34 is formed with a through hole 34b extending in the axial direction. The lower end of the catch 34 is provided with a pair of inclined surfaces that are cam portions 34d. This cam part 34d is formed as a point object centered on the axis line of the catch 34. In the cam portion 34d, two concave portions 38 and convex portions 37 are alternately formed in the circumferential direction.

The shaft portion 35 passes through the through hole 34b of the catch 34. The shaft part 35 has the small diameter part 35a by which the whole circumference is cut off in the middle of the longitudinal direction. That is, the shaft part 35 is comprised from the large diameter part 35b of both ends, and the small diameter part 35a provided between the large diameter part 35b. A fluid passage P (see FIG. 12) connecting the first chamber S1 and the second chamber S2 is formed between the outer circumference of the small diameter portion 35a and the inner circumference of the catch 34. Hinge devices for mobile phones are originally small. It may be difficult to process the groove along the shaft portion 35. For this reason, in the hinge apparatus of this embodiment, the small diameter part 35a is processed in the whole periphery of the axial part 35 in order to make a process easy. As shown in FIG. 12, the large diameter part 35b of the shaft part 35 is inserted in the head part 31c of the cylinder 31, and the lower end part of the shaft part 35 is the insertion hole 33a of the shaft body 33. As shown in FIG. Is inserted in.

The shaft 33 is comprised from the cam part 33b which opposes the cam part 34d of the catch 34, and the connection shaft part 33c extended below from the cam part 33b. The shaft 33 of this embodiment is separated from the shaft 35. In the shaft 33, an insertion hole 33a into which the shaft 35 is inserted is formed. The insertion hole 33a has a bottom, and the end face in the axial direction of the shaft portion 35 is in contact with the bottom. The shaft 33 is accommodated so that it can rotate in the cylinder 31 and cannot slide. The cam part 33b of the shaft body 33 has the shape corresponding to the cam part 34d of the catch 34, and is formed in point symmetry centering on the axis line of the shaft body 33. As shown in FIG. The cam part 33b of the shaft body 33 which is a contact part contacts the cam part 34d of the catch 34. As shown in FIG. The cam portion 34d of the catch 34 and the cam portion 33b of the shaft 33 link the slide movement of the catch 34 with the rotational movement of the shaft 33. A connecting surface 33c of the shaft 33 is provided with a flat surface 33d for transmitting the rotation of the shaft 33 to the operation side housing 1.

As shown in FIG. 13, an O-ring 40 is inserted into the outer circumference of the shaft 33. The o-ring 40 prevents leakage of viscous fluid filled in the cylinder 31 to the outside. In the shaft 33, a bearing 41 and a washer 42 rotating together with the shaft 33 are inserted. The washer 42 is fixed to the cylinder 31 by bending the open end of the cylinder 31 inwardly (see FIG. 12). The shaft 33 and the bearing 41 rotate while sliding on the washer 42.

FIG. 14 shows the relationship between the opening angle of the cellular phone, the slide motion of the catch 34 and the rotational motion of the shaft 33. The upper part of FIG. 14 shows the opening angle of a mobile telephone, the middle part shows the positional relationship of the catch 34 and the shaft body 33, and the lower part shows the detailed view of the small diameter part 35a of the shaft part 35. As shown in FIG.

As shown in Fig. 14A, in the closed state of the cellular phone, the cam portion 33b of the shaft body 33, which is a contact portion, is locked while being in contact with the rising inclined surface 43 of the catch 34. As shown in Figs. When the display-side housing 2 is rotated slightly (for example, 20 degrees) manually from this state, the cam portion 33b of the shaft 33 moves to the uppermost portion 44 of the rising slope 43 of the catch 34. Sit up At this time, the catch 34 is slightly raised in the upward direction against the spring force of the coil spring 32 (Fig. 14 (b)). When the cam portion 33b of the shaft 33 passes the uppermost portion 44 of the inclined surface 43, the motor is released and the cam portion 33b is moved to the descending inclined surface 45. In this case, the catch 34 slides downward in the figure by the spring force of the coil spring 32. By the slide of the catch 34 in the downward direction, the cam part 33b slides the falling inclined surface 45, and the shaft body 33 rotates automatically. That is, after passing through the conversion point shown in Fig. 14B, the cellular phone is automatically opened to full opening as shown in Figs. 14C to 14E. When the cellular phone is opened to the full open, the catch 34 slides downward and the cam portion 33b moves to the bottom 45a of the descending slope 45.

Between the outer peripheral surface of the small diameter part 35a of the shaft part 35, and the inner peripheral surface of the through hole 34b of the catch 34, from the 1st yarn S1 to the 2nd yarn S2, or the 2nd yarn S2. A fluid passage P is formed which guides the viscous fluid from the first seal S1. The fluid passage P changes the resistance of the fluid by the slide movement of the catch 34 with respect to the shaft 35. While the catch 34 is moving up and down with respect to the shaft portion 35, the upper end portion 46 of the small diameter portion 35a of the shaft portion 35 is always exposed and is not covered by the catch 34. On the other hand, the lower end 49 of the small diameter portion 35a of the shaft portion 35 may or may not be covered by the catch 34.

Specifically, when the opening angle is 0 degrees to less than 90 degrees, the lower end 49 of the small diameter portion 35a is not covered by the catch 34. This is because the recessed portion 38 is formed in the cam portion 34d of the catch 34. At this time, the fluid passage P connects the first chamber S1 and the second chamber S2. When the opening angle exceeds 90 degrees, the catch 34 slides downward, so the catch 34 starts to cover the lower end 49 of the small diameter portion 35a of the shaft portion 35. When the opening angle exceeds 120 degrees, the catch 34 completely covers the lower end 49 of the small diameter portion 35a. When the lower end 49 of the small diameter portion 45a is covered by the catch 34, the fluid passage P cannot connect the first chamber S1 and the second chamber S2.

When the opening angle is between 0 degrees and 90 degrees, the fluid passage P connects the first chamber S1 and the second chamber S2. While the fluid passage P connects the first chamber S1 and the second chamber S2, the catch 34 slides in the upward or downward direction so that the first chamber S1 and the second chamber S2. The viscous fluid 20 is transferred from the first chamber S1 to the second chamber S2 or from the second chamber S2 to the first chamber S1 via the fluid passage P, even if the volume of? Move smoothly. Because of this, when the opening angle is between 0 degrees and 90 degrees, the damper does not function very much. For this reason, the catch 34 slides rapidly downward, and the shaft 33 rotates rapidly.

When the opening angle exceeds 90 degrees, the area where the small diameter portion 35a is exposed in the second chamber S2 gradually decreases. As a result, the resistance of the fluid in the fluid passage P also gradually increases. In this case, when the catch 34 slides downward, a damper force is generated and it becomes difficult for the viscous fluid 20 to move from the second chamber S2 to the first chamber S1. The damper force gradually increases until the opening angle is 120 degrees. When the opening angle is between 90 degrees and 120 degrees, since the damper force gradually increases, the slide in the downward direction of the catch 34 is gradually decelerated, and the rotation of the shaft 33 is also gradually decelerated.

When the opening angle exceeds 120 degrees, the fluid passage P cannot connect the first chamber S1 and the second chamber S2. For this reason, when the catch 34 slides downward, the largest damper force generate | occur | produces. The damper acts until the opening angle is 170 degrees, which is fully open. At this time, the viscous fluid 20 is formed from the second chamber S2 via a slight gap between the shaft 33 and the catch 34 or a slight gap between the catch 34 and the cylinder 31. 1 Move to chamber S1. When the opening angle is between 120 degrees and 170 degrees, since the largest damper force is acting, the catch 34 slides slowly downward, and the shaft 33 also rotates slowly.

Fig. 15 shows how the volumes of the first and second chambers S1 and S2 change according to the opening angle of the cellular phone. As the opening angle is 0 degrees to 20 degrees, the volume of the first chamber S1 is reduced, and the volume of the second chamber S2 is increased. As the opening angle increases from 20 degrees to 90 degrees, the volume of the first chamber S1 is increased, and the volume of the second chamber S2 is decreased. The fluid passage P connects the first chamber S1 and the second chamber S2 when the opening angle is between 0 degrees and 90 degrees. When the opening angle is 90 degrees to 120 degrees, the lower end 49 of the small diameter portion 35a is gradually covered by the catch 34, and the resistance of the fluid in the fluid passage P also gradually increases. When the opening angle is 120 degrees to 170 degrees, the lower end 49 of the small diameter portion 35a is completely covered by the catch 34, and the fluid passage P connects the first chamber S1 and the second chamber S2. You won't be able to.

According to the present embodiment, the fluid passage P for guiding fluid from one side of the first chamber S1 or the second chamber S2 to the other of the catch 34 and the small diameter portion 35a of the shaft portion 35 is formed. Is installed between. The resistance of the fluid in the fluid passage P can be changed by using the cam motion of the catch 34 and the undulating cam shape of the catch 34, thereby facilitating the function of the damper or disabling the damper. .

16 and 17 show a hinge device of a fourth embodiment of the present invention. 16 shows an external view of the hinge device, and FIG. 17 shows a cross-sectional view of the hinge device. The hinge apparatus of this embodiment is similar to the hinge apparatus of 1st Embodiment, the cylinder body 51 which has a cavity inside, the shaft body 52 accommodated so that only rotation in the cylinder body 51, and the cylinder body 51 can be carried out. The catch 54 which is a movable cam which is accommodated in the cavity of the shaft 52 and has a through hole 54e through which the shaft portion 53 of the shaft 52 penetrates, and presses the catch 54 to the cam portion 52b of the shaft 52. The coil spring 56 which is a pressing means is provided. The hinge device of this embodiment has a damper force not only when opening the display side housing 2 of the cellular phone with respect to the operation side housing 1 but also when closing the display side housing 2 and the operation side housing 1. Generates.

As shown in FIG. 16, the cylindrical body 51 is provided with some flat surface 51a, 51b in the circumferential direction according to the shape of the connection cylinder part of a mobile telephone. In the connecting shaft portion 52a of the shaft body 52, a flat surface matching the shape of the connecting cylinder portion of the cellular phone is formed.

18 shows an exploded perspective view of the hinge device. A plurality of flat surfaces 54a and 54b corresponding to the flat surfaces 51a and 51b of the cylinder 51 are formed on the side surface of the catch 54. The lower end of the catch 54 is provided with a cam portion 54c. The expanded view of the cam part 54c is a mountain shape which has the top part 61 and the 1st and 2nd inclined surfaces 63 and 64 on both sides of the top part 61 in the section of 0 degree-180 degree as shown in FIG. Is formed. Similarly, in the section of 180 degree to 360 degree, it is formed in the mountain shape which has the top part 61 and the 1st and 2nd inclined surfaces 63 and 64 on both sides of the top part 61. FIG. For this reason, as shown in FIG. 18, in the cam part 54c, the recessed part 65 and the convex part 66 are alternately formed at intervals of about 90 degrees in the circumferential direction. The catch 54 is formed with a through hole 54e extending in the axial direction. The shaft portion 53 of the shaft body 52 penetrates the through hole 54e.

The shaft body 52 is the shaft part 53 extended in the axial direction of the cylinder 51, the cam part 52b which opposes the cam part 54c of the catch 54, and the connection extended below the cam part 52b. It consists of the shaft part 52a. The shaft portion 53 penetrates the through hole 54e of the catch 54. The shaft portion 53 is machined with a pair of fluid passage grooves 53b extending from the upper end to the middle of the shaft portion 53 downward. The shape of the developed view of the cam portion 52b is approximately equal to the shape of the developed view of the cam portion 54c of the catch 54. The convex part of the cam part 52b becomes the contact part 68 which contacts the cam part 54c of the catch 54. As shown in FIG.

The O-ring 71 is inserted into the outer circumference of the shaft 52. A bearing 72 is inserted into the connecting shaft portion 52a of the shaft body 52. The bearing 72 rotates integrally with the shaft 52. Under the bearing 72, a washer 73 fixed to the open end of the cylinder 51 is provided. The bearing 72 rotates while sliding with respect to the washer 73.

As shown in FIG. 17, the inner space of the cylinder 51 is partitioned into the first chamber S1 and the second chamber S2 in the axial direction by the catch 54. Each of the first chamber S1 and the second chamber S2 is filled with a viscous fluid.

20 is a diagram illustrating a relationship between the opening angle of the mobile phone, the position in the axial direction of the catch 54, and the rotation angle of the shaft 52. The upper part in the figure shows the opening angle of the mobile phone, the middle part shows the positional relationship between the catch 54 and the shaft body 52, and the lower part shows the detailed view of the fluid passage groove 53b. In the mobile telephone of this embodiment, the conversion point is located at 75 degrees, and when the mobile telephone in a closed state is opened, if it is manually opened to 75 degrees, it is automatically opened to 165 degrees automatically. On the other hand, when closing the mobile phone in the open state, if it closes manually to 75 degrees, it automatically closes to 0 degrees.

As shown in Fig. 20A, in the closed state of the cellular phone, the contact portion 68 of the cam portion of the shaft 52 is locked while being in contact with the bottom portion of the first inclined surface 63 of the catch 54. . From this state, when the display side housing 2 is manually rotated, the contact portion 68 of the shaft 52 slides along the first inclined surface 63 of the catch 54. When the display side housing 2 is rotated by 75 degrees, the contact portion 68 of the shaft body 52 sits on the top portion 61 of the cam portion 54c of the catch 54. At this time, the catch 54 slides upward in the figure against the spring force of the coil spring 56 (Fig. 20 (c)).

When the contact portion 68 of the shaft 52 passes through the top portion 61 of the catch 54, the contact portion 68 of the shaft body 52 moves to the second inclined surface 64 of the cam portion 54c of the catch 54. do. In this case, the catch 54 slides downward in the figure by the spring force of the coil spring 56, and the shaft body 52 rotates while the contact part 68 slides along the 2nd inclined surface 64. As shown in FIG. That is, after passing through the conversion point shown in FIG. 20C, as shown to (d)-(e) in a figure, a cellular phone is automatically opened to full opening.

When the cellular phone is closed, the above operation and the reverse operation are performed. When closing the cellular phone in the fully opened state of 165 degrees, if it is manually closed up to 75 degrees, which is the conversion point shown in Fig. 20C, the coil spring 56 automatically closes to 0 degrees by the spring force.

Between the fluid passage groove 53b of the shaft portion 53 and the inner circumferential surface of the catch 54 is provided a fluid passage P for guiding viscous fluid from one side of the first chamber S1 or the second chamber S2 to the other. do. The fluid passage P changes the resistance of the fluid by the slide movement in the downward direction of the catch 54 and the rotational movement of the shaft 52.

Specifically, when the opening angle is 75 degrees (that is, when the contact portion 68 of the shaft 52 contacts the top portion 61 of the catch 54), the fluid passage groove constituting the fluid passage P ( 53b) is exposed to the 1st chamber S1, and is also exposed to the 2nd chamber S2, and connects 1st chamber S1 and 2nd chamber S2. For this reason, the resistance of the fluid of the fluid passage P is small.

On the other hand, as the opening angle becomes smaller from 75 degrees to 35 degrees, the lower end portion in the axial direction of the fluid passage groove 53b starts to gradually cover the catch 54. And when the opening angle is between 35 degrees and 0 degrees (that is, when the contact portion 68 of the shaft body 52 is at the bottom of the first inclined surface 63 from a predetermined position spaced apart from the top portion 61), the fluid passage groove The lower end of 53b is completely covered with catch 54. In this case, the fluid passage P cannot connect the first chamber S1 and the second chamber S2, so that the resistance of the fluid in the fluid passage P increases.

Similarly, when the opening angle is gradually increased from 75 degrees to 135 degrees, the lower end in the axial direction of the fluid passage groove 53b starts to be gradually covered by the catch 54. And when the opening angle is 135 degrees to 165 degrees (that is, when the shaft 52 contact portion 68 is at the bottom of the second inclined surface 64 from a predetermined position spaced apart from the top portion 61), the fluid passage groove ( The lower end of 53b) is fully occluded with catch 54. In this case, the fluid passage P cannot connect the first chamber S1 and the second chamber S2, so that the resistance of the fluid in the fluid passage P increases.

FIG. 21 shows how the volumes of the first and second chambers S2 will be changed by the opening angle of the cellular phone. In all the figures of (a)-(e), the shaft body 52 is made into the cross section where the fluid passage groove 53b exists. As the opening angle becomes 0 degrees to 75 degrees, the volume of the first chamber S1 is decreased, and the volume of the second chamber S2 is increased. On the other hand, while the opening angle is 75 degrees to 165 degrees, the volume of the first chamber S1 is increased, and the volume of the second chamber S2 is decreased. When the opening angle is between 35 degrees and 75 degrees, the fluid passage P connects the first chamber S1 and the second chamber S2. However, when the opening angle is between 0 degrees and 35 degrees and the opening angle is between 135 degrees and 165 degrees, the fluid passage P cannot connect the first chamber S1 and the second chamber S2.

By the above, it becomes possible to function a damper between 0 degree-35 degree, and 135 degree-165 degree of opening angle. When opening the cellular phone, the damper operates when the opening angle exceeds 135 degrees, so that the display-side housing 2 suddenly stops in the full opening, thereby preventing the cellular phone from being pulled out of the hand by recoil. In addition, since the display side housing 2 is not strongly closed even when the cellular phone is closed, the sound when closed is quiet, and a finger is caught between the display side housing 2 and the operation side housing 1. Your finger will not hurt.

22 to 24 show the hinge device of the fifth embodiment of the present invention. 22 shows an external view of the hinge device, FIG. 23 shows an exploded perspective view, and FIG. 24 shows a sectional view. As shown in FIG. 23, the hinge apparatus of this embodiment is similar to the hinge apparatus of 1st Embodiment, and the cylinder 76 which has a cavity inside, and the shaft body accommodated so that only rotation in the cylinder 76 ( 77, a catch 78 which is a movable cam having a shaft portion 82 separate from the shaft body 77, a through hole 78b that is accommodated in the cavity of the cylinder body 76 and through which the shaft portion 82 penetrates; Coil springs 79 and 80 which are pressing means for pressing 78 to cam portion 77b of shaft 77 are provided.

The hinge device of this embodiment also provides a damper force not only when the display side housing 2 of the cellular phone is opened with respect to the operation side housing 1 but also when the display side housing 2 and the operation side housing 1 are closed. Generates. The timings at which the dampers are operated when opening and closing the cellular phone are made different. This is to prevent the damper from functioning when the cellular phone is manually opened or closed.

As shown in FIG. 22, the cylindrical body 76 is provided with the several flat surface 76a in the circumferential direction according to the shape of the connection cylinder part of a mobile telephone. The connecting shaft portion 77a of the shaft 77 is also formed with a flat surface matching the shape of the connecting cylinder portion of the cellular phone.

As shown in FIG. 23, a plurality of flat surfaces 78a corresponding to the flat surfaces 76a of the cylinder 76 are formed on the side surfaces of the catch 78. The lower end of the catch 78 is provided with a cam portion 78c. The developed view of the cam portion 78c is formed similarly to the catch 78 of the mobile phone of the fourth embodiment. The cam portion 78c is formed with two recesses 83 and convex portions alternately in the circumferential direction. The catch 78 is formed with a through hole 78b extending in the axial direction. The shaft portion 82 penetrates the through hole 78b.

25 shows a detailed view of the shaft 77. The shaft 77 is comprised by the cam part 77b which opposes the cam part 78c of the catch 78, and the connection shaft part 77a extended below from the cam part 77b. The shape of the developed view of the cam portion 77b is approximately equal to the shape of the developed view of the cam portion 78c of the catch 78. The convex portion of the cam portion 77b becomes the contact portion 88 which contacts the cam portion 78c of the catch 78.

The shaft 77 is formed with a hole 77c into which the lower end of the shaft 82 is inserted. On the inner circumference of the hole 77c, a pair of parallel opposing surfaces 77d is formed. The distance L1 between the pair of opposing surfaces 77d is equal to the distance L2 (see FIG. 26D) between the pair of flat surfaces 82a of the outer circumference of the shaft portion 82. When the shaft portion 82 is inserted into the hole 77c of the shaft body 77, the shaft portion 82 is allowed to slide only with respect to the shaft body 77, and cannot rotate. The protrusion 77e is formed in the bottom face of the hole 77c. This is because the viscous fluid is spread widely between the bottom face of the hole 77c and the shaft portion 82.

26 shows a detailed view of the shaft portion 82. The shaft portion 82 is machined with a pair of fluid passage grooves 82b extending from the upper end to the middle of the shaft 82. A pair of parallel flat surfaces 82a are formed at the end portion 82d (lower end portion) in the axial direction of the shaft portion 82. An end portion 82d of the shaft portion 82 is inserted into the hole 77c of the shaft body 77. In addition, an arcuate cutout 82c is formed at the end portion 82d of the shaft portion 82. The notch 82c allows the viscous fluid to flow into the hole 77c while the end portion 82d of the shaft 82 is inserted into the hole 77c of the shaft 77. By doing so, it is possible to prevent the vacuum state from occurring when the shaft portion 82 is spaced with respect to the shaft body 77 and becoming difficult to be spaced apart. In addition, a projection 82e having a narrow diameter is formed at the upper end of the shaft portion 82. Around the protrusion 82e, a shoulder 82f to which the pressure of the liquid is applied is formed. The shaft portion 82 is easily moved by applying a liquid pressure to the shoulder 82f.

FIG. 27 shows a state in which the shaft portion 82 is inserted into the shaft body 77. The shaft portion 82 is inserted into the hole 77c of the shaft body 77 by matching the position of the flat surface 82a of the shaft portion 82 with the position of the opposing surface 77d of the hole 77c of the shaft body 77. Can be. When the shaft portion 82 is inserted into the hole 77c of the shaft 77, the cutout 82c of the shaft portion 82 comes to the position of the recess 77f of the cam portion 77b of the shaft 77. The upper portion of the cutout 82c of the shaft 82 is exposed from the shaft 77. For this reason, the viscous fluid flows into the hole 77c of the shaft 77 through the notch 82c.

As shown in FIG. 23, an O-ring 85 is inserted into the outer circumference of the shaft 77. The bearing 86 is inserted into the connecting shaft 77a of the shaft 77. The bearing 86 rotates with the shaft 77. Under the bearing 86, a washer 87 fixed to the open end of the cylinder 76 is provided. The bearing 86 rotates while sliding with respect to the washer 87.

As shown in the cross-sectional view of FIG. 24, the internal space of the cylinder 76 is partitioned into the first chamber S1 and the second chamber S2 in the axial direction by the catch 78. Each of the first chamber S1 and the second chamber S2 is filled with a viscous fluid. As shown in (a) of the figure, when the catch 78 rises in the (1) direction against the spring force of the coil springs 79 and 80, the pressure of the first seal S1 is increased to the second. It becomes higher than the pressure of the seal S2. For this reason, the shaft part 82 is urged in the hole 77c of the shaft body 77. On the other hand, as shown in (b) of the figure, when the catch 78 is lowered in the (2) direction by the spring force of the coil springs 79 and 80, the pressure of the second seal S2 is zero. It becomes higher than the pressure of one chamber S1. For this reason, the axial part 82 slides upwards, and the projection 82e comes into contact with the cylinder 76.

FIG. 28 is a diagram showing the relationship between the opening angle of the mobile phone and the movement of the catch 78, the shaft 77, and the shaft 82. The upper end in FIG. 28 shows the opening angle of the mobile phone, the interruption shows the movement of the catch 78, the shaft 77, and the shaft 82, and the lower end shows the details of the fluid passage groove 82b of the shaft 82. Shows a figure. In the mobile telephone of this embodiment, the conversion point is located at 80 degrees, and when the mobile telephone in the closed state is opened, if it is manually opened to 80 degrees, it is automatically opened to 165 degrees automatically. On the other hand, when closing the mobile phone in the open state and closing it manually to 80 degrees, it automatically closes to 0 degrees.

As shown in (a) of the figure, in the state where the cellular phone is closed, the contact portion 88 of the shaft 77 is in contact with the recess 83 of the catch 78. From this state, when the display side housing 2 is rotated manually, the catch 78 is raised by the rotation of the shaft body 77. By the raising operation of the catch 78, the first chamber S1 becomes a high pressure and the second chamber S2 becomes a low pressure. The shaft portion 82 slides downward by the pressure difference between the first chamber S1 and the second chamber S2. As shown in (b) of the figure, the end portion 82b1 of the fluid passageway groove 82b is exposed from the catch 78 within a relatively small rotational angle 13 ° with the slide below the shaft portion 82. do. That is, when the opening angle is 13 °, the fluid passage groove 82b constituting the fluid passage P is exposed to both the first chamber S1 and the second chamber S2, so that the first chamber S1 and the first chamber S1 and the second chamber S2 are exposed. 2 Connect the thread (S2). For this reason, the resistance of the fluid of the fluid passage P becomes small, and the damper does not function. This facilitates the manual opening of the display side housing up to 80 ° as shown in (c) of the figure.

When the opening angle exceeds 80 °, the catch 78 is automatically lowered by the spring force of the coil springs 79 and 80. As shown in (d) in the figure, the first chamber S1 is at low pressure and the second chamber S2 is at high pressure by the lowering operation of the catch 78. In this case, the axial part 82 is raised by the pressure difference between the 1st chamber S1 and the 2nd chamber S2. As the shaft portion 82 rises, the end portion 82b1 of the fluid passageway groove 82b is completely blocked by the catch 78 from within a rotation angle 153 ° which is not so large. Since the fluid passage P cannot connect the first seal S1 and the second seal S2, the resistance of the fluid in the fluid passage P increases, and the damper operates. As shown in (e) in the figure, the mobile phone slowly opens completely with the damper operating.

FIG. 29 is a diagram showing that the timing at which the damper operates when the cellular phone is opened and closed is different. The upper part in the figure shows a sectional view of the hinge device when opening the cellular phone, and the lower part in the figure shows a sectional view of the hinge device when the mobile phone is closed. As described above, since the shaft portion 82 is lowered when opening the mobile phone in the closed state, the damper is turned OFF within an angle (13 °) where the rotation angle of the display-side housing 2 is relatively small. . This facilitates the manual opening of the cellular phone up to 80 °, which is the conversion point. Since the shaft portion 82 is raised after the change point 80 °, the damper is turned ON within a rotation angle 153 ° which is not so large. When the rotation angle is 153 ° to 165 °, the damper continues to operate. This can alleviate the impact when the cellular phone is fully open automatically.

As shown in the lower part of FIG. 29, when manually closing the fully open cellular phone, the first chamber S1 is at high pressure and the second chamber S2 is at low pressure, so that the shaft portion 82 is in a lowered position. Is in. At this time, since the fluid passage groove 82b of the shaft portion 82 can connect the first chamber S1 and the second chamber S2, the damper is turned off. This makes it easy to manually close the cellular phone up to the conversion point 80 °. After passing through the change point (80 °), the cellular phone attempts to close automatically by the spring force of the coil springs 79 and 80. As the catch 78 descends, the first chamber S1 is at a low pressure, and the second chamber S2 is at a high pressure. Since the shaft portion 82 is raised by the pressure difference between the first chamber S1 and the second chamber S2, the damper is turned on within a relatively large rotation angle 38 °. Thereafter, the damper remains on until the opening angle becomes 38 ° → 0 °, thereby alleviating the impact force when the mobile phone is automatically closed.

30 and 31 show a hinge device of a sixth embodiment of the present invention. The hinge device of this embodiment has a different timing when the damper is operated when the cellular phone is opened and when the mobile phone is closed, similarly to the hinge device of the fifth embodiment. Only the structure of the shaft part 91 differs from the hinge apparatus of 5th Embodiment. Other cylinder 76, coil springs 79, 80, catch 78, shaft 77, O-ring 85, bearing 86, washer 87 are the same as the hinge device of the fifth embodiment. Therefore, the same match is given and the description is omitted.

The shaft part 91 of the hinge apparatus of this embodiment has the small diameter part 91a by which the perimeter is cut | disconnected in the longitudinal direction. That is, the shaft part 91 is comprised from the large diameter part 91b of the both ends of an axial direction, and the small diameter part 91a provided between the large diameter part 91b. Between the outer circumference of the small diameter portion 91a and the inner circumference of the catch 78, a fluid passage P capable of connecting the first chamber S1 and the second chamber S2 is formed (see FIG. 31). The hinge device for a mobile phone is originally small, and it may be difficult to process a groove in the shaft portion 91. For this reason, in the hinge apparatus of this embodiment, the small diameter part 91a is processed in the whole periphery of the axial part 91 in order to make process easy. Thus, the small diameter portion 91a may be formed in the shaft portion 91 instead of the fluid passage groove extending in the axial direction.

In addition, this invention is not limited to the said embodiment, It can implement in another embodiment in the range which does not change the summary of this invention. For example, when the fluid passage does not connect the first chamber and the second chamber, an orifice having a smaller cross-sectional area than the fluid passage may connect the first chamber and the second chamber. In addition, when the damper functions, the resistance of the fluid in the fluid passage connecting the first chamber and the second chamber may be large, and the fluid passage may not be completely closed.

In addition, the hinge device of the present invention can be applied to not only portable telephones but also portable computers such as laptops, handhelds, PDAs, Pocket PCs, Palms, and the like, which can be used by portable computers, portable game machines, and decorative compacts. It can also be applied to the connection portion of the toilet seat and the toilet lid.

This specification is based on the JP Patent application 2006-356362 of the December 28, 2006 application, and the Japan patent application 2007-153363 of the June 8, 2007 application. Include all of this here.

Claims (16)

The cylinder having a cavity inside, A movable cam which is accommodated so as to be slidable in the axial direction of the cylinder and cannot rotate, and has a through hole extending in the axial direction; A shaft body accommodated in the cylinder so as to be able to rotate around the axis of the cylinder and not slide in the axial direction; A cam portion provided on one of the movable cam or the shaft so as to interlock rotation around the axis of the shaft and the slide in the axial direction of the movable cam; A contact portion provided on the movable cam or the other side of the shaft body and in contact with the cam portion; A fluid filled in the first and second chambers in the cylinder partitioned by the movable cam, A shaft portion penetrating the through hole of the movable cam; The movable cam is installed between the shaft portion and the movable cam and guides the fluid filled in one of the first chamber or the second chamber to the other side, and the movable cam is relatively slide and / or relatively to the shaft portion. And a fluid passageway in which the resistance of the fluid changes by rotating. The hinge device according to claim 1, wherein the shaft and the shaft are integral. The fluid passageway according to claim 2, wherein the shaft portion of the shaft body is formed with a fluid passage groove constituting the fluid passage extending in the axial direction, And the movable cam relatively slides and rotates relative to the shaft portion, so that the movable cam covers the axial end of the fluid passageway groove. The said cam part is provided with the said cam part, The contact portion is provided on the shaft, By the inclined surface of the cam portion in contact with the contact portion, the cam portion is shifted in the circumferential direction to form a recess and a convex portion. When the movable cam is relatively rotated relative to the shaft portion, when the recessed portion of the movable cam is in the position of the fluid passageway groove, the axial end of the fluid passageway groove is exposed, When the movable cam is relatively rotated relative to the shaft portion, and the convex portion of the movable cam comes to the position of the fluid passageway groove, the end portion in the axial direction of the fluid passageway groove is formed on the convex portion of the movable cam. It is covered by a hinge device. The hinge device according to any one of claims 1 to 4, wherein The hinge apparatus accommodated in the said cylinder, and further provided with the pushing means which presses the said movable cam to the said shaft body. The one end of the said shaft part is rotatably supported by the bottom face of the said cylindrical body with a bottom, The said any one of Claims 2-4. The hinge device is characterized in that the shaft is rotatably supported by the open end of the cylinder. The hinge device according to any one of claims 1 to 6, wherein the shaft is provided with a pin that protrudes in a direction orthogonal to the axis as the contact portion. 2. The small diameter portion constituting the fluid passage is formed in the middle of the axial direction of the shaft portion, and the movable cam slides with respect to the shaft portion so that the movable cam covers the end portion of the small diameter portion in the axial direction. The hinge device characterized by the above-mentioned. The said cam part is provided with the said cam part, The contact portion is provided on the shaft, By the inclined surface of the cam portion in contact with the contact portion, the cam portion is shifted in the circumferential direction to form a recess and a convex portion. When the movable cam slides toward the end portion in the axial direction of the small diameter portion, the movable cam gradually closes the end portion of the small diameter portion by using the shape of the concave portion and the convex portion. . According to claim 1, wherein the shape of the developed view of the cam portion is formed in a top shape and a mountain shape having a first and a second inclined surface on both sides, The resistance of the fluid in the fluid passage when the contact portion contacts the top portion is less than the fluid resistance of the fluid passage when the contact portion is at the bottom of the first inclined surface from a predetermined position spaced apart from the top portion. Or the contact portion is smaller than the fluid resistance of the fluid passage when the contact portion is at the bottom of the second inclined surface from a predetermined position spaced from the top portion. According to claim 1, wherein the shape of the developed view of the cam portion is formed in a top shape and a mountain shape having a first and a second inclined surface on both sides, The resistance of the fluid in the fluid passage when the contact portion contacts the top portion is smaller than the fluid resistance of the fluid passage when the contact portion is at the bottom of the first inclined surface from a predetermined position spaced from the top portion, And the contact portion is smaller than the fluid resistance of the fluid passage when the contact portion is at the bottom of the second inclined surface from a predetermined position spaced from the top portion. The said shaft part is independent from the said shaft body, and utilizes the pressure difference of the fluid filled in the said 1st and said 2nd chamber | seats which generate | occur | produces when the said movable cam slides to the said axial direction of the said cylinder body. And slidable relative to the shaft. The fluid passageway of claim 12, wherein the shaft portion extends in the axial direction to form a fluid passage groove forming the fluid passage, The hinge device, characterized in that the movable cam covers the axial end of the fluid passageway groove by the shaft portion sliding relative to the shaft body. The small diameter portion constituting the fluid passage is formed in the axial direction of the shaft portion, The movable cam covers the end portion in the axial direction of the small diameter portion by sliding the movable cam with respect to the shaft portion. The said shaft body is formed with the hole in which the edge part of the said shaft part is inserted in the said axial direction is formed, And a cutout portion is formed at an end portion of the shaft portion so as to fill the fluid in the hole with the shaft portion inserted into the hole of the shaft body. The hinge device according to any one of claims 1 to 15, wherein the hinge device is assembled to a connecting portion between the first housing and the second housing.

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