JP2002013523A - Hinge unit and hinge structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hinge structure which can manage a torque of hinge unit without mounting to a first casing and a second casing and install easily to the first and second casings. SOLUTION: In the hinge structure, a shaft 26 is pressed into a fixing shaft 28 and received a spring 32 and a sliding cam 34. The sliding cam 34 is movable along longitudinal axis of the fixing shaft 28 without rotating around axis of the fixing shaft 28 having a rotating preventing stopper. The sliding cam 34 is energized by biasing spring 32 and moved toward distant place far from a flange 30. Meantime, the shaft 26 is inserted into a fixing cam 40 rotating on the shaft 26 and engaging the cam 34. A stopper 44 is pressed into the shaft 26 at the end preventing slip out of the fixing cam 40, etc. Therefore, it is possible to carry out a load test and a durability test of a hinge unit 10 without mounting to a main body and a cover so that the sliding cam 34 and the fixing cam 40 can rotate relatively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge unit for regulating a rotation angle, and a first unit using the hinge unit.
The present invention relates to a hinge structure that supports a housing and a second housing so as to be relatively rotatable.

[0002]

2. Description of the Related Art FIGS. 17 and 18 show a hinge unit 102 used for a foldable portable telephone.
04 and the second housing 106 are relatively rotatable. A substantially cylindrical second hinge portion 108 is formed on the second housing 106, and a guide projection 110 is provided on the inner peripheral side thereof.

On the other hand, the female boss 112 has a substantially cylindrical body with a bottom, and the guide projection 11
A guide groove 114 that can be engaged with zero is formed. The female boss 112 is disposed in the second hinge 108 with the guide groove 114 engaged with the guide projection 110,
It cannot rotate with respect to the hinge portion 108.

[0004] A through hole 112A is formed in the bottom of the female boss 112 at the shaft core so that a fixing screw 126 can be inserted therethrough. The fixing screw 126 is screwed into a bottom surface of a first hinge portion 118 described later.

A spring 124 is inserted into the shaft portion 126B of the fixing screw 126. One end of the spring 124 is in contact with the flange portion 126A of the fixing screw 126, and the other end is in contact with the bottom surface of the female boss 112. As a result, the female boss 112 is urged toward the male boss 120.

On the other hand, the first hinge portion 118 formed in the first housing 104 has a substantially cylindrical shape with a bottom, and a female screw portion 118 into which a fixing screw 126 can be screwed.
A is formed.

In the first hinge portion 118, the female boss 11 is provided.
2, the male boss 120 is stored. A through hole 120 </ b> A through which the fixing screw 126 can pass is formed in the shaft core of the male boss 120.

Here, the spherical body 1 is placed on the top surface of the female boss 112.
The male boss 12 is arranged with a part of the male boss 12 exposed.
It can move along the engagement groove 120B formed at 0. A recess 120C is formed at the start point of the engagement groove 120B, and a recess 118D is formed at the end point.

The engaging groove 120B, the recess 120C and the recess 1
18D have different depths, and as the sphere 122 moves, the female boss 112
When the sphere 122 is moved in the axial direction of the hinge portion 108 and the sphere 122 is disposed in the concave portions 120C and 120D, the sphere 122 is locked,
The rotation of the first housing 104 and the second housing 106 is restricted.

However, the hinge unit 102 includes a spring 124, a female boss 112,
When the hinge unit 108 and the male boss 120 are inserted and screwed into the bottom surface of the first hinge unit 118 and the fixing screw 126 is fixed, the unit functions as the hinge unit 102 for the first time.

Therefore, the first housing 104 and the second housing 1
Unless these parts are attached to 06, mechanical values such as torque required for the relative rotation of the female boss 112 and the male boss 120 cannot be obtained. Further, since the fixing unit 126 is screwed into the bottom surface of the first hinge unit 118 to assemble the hinge unit 102, the operation is troublesome.

[0012]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention makes it possible to control the torque as a hinge unit without attaching to the first housing and the second housing, and to control the torque of the first housing and the second housing. It is an object to obtain a hinge structure in which the hinge unit can be easily attached to the two housings.

[0013]

According to the first aspect of the present invention, the sliding cam is prevented from rotating with respect to the shaft.
It is movable in the axial direction of the shaft and is prevented from falling off the shaft. On the other hand, a cylindrical fixed cam is rotatably inserted into the shaft. A stopper is fitted on the shaft to prevent the fixed cam from coming off. Then, the sliding cam is urged toward the fixed cam by the urging means.

Here, a cam surface is provided on an abutting surface of the sliding cam and the fixed cam, and the cam surface comes into contact with and separates from the entire surface by a relative rotation angle between the sliding cam and the fixed cam. The contact form up to the part contact is taken.

The hinge unit can relatively rotate the sliding cam and the fixed cam itself without being attached to the main body and the lid, so that a mechanical value such as a necessary torque is determined. For this reason, the torque can be managed as a hinge unit, and there is little variation as a product.

In this hinge unit, for example,
After a flange is formed on one end of the shaft and the sliding cam, the urging means, and the fixed cam are inserted through the shaft, the stopper can be fitted on the other end of the shaft to prevent the removal of these components. Therefore, the workability is better than the case where the fixing screw is screwed into the main body to prevent the parts from coming off.

Considering the case where a fixed cam is attached to the shaft portion of the main body and the shaft is fixed to the shaft portion of the lid using this hinge unit, for example, when the lid is opened from the closed state to the opening direction. While the sliding cam rotates with respect to the fixed cam integrally with the shaft, it moves in the axial direction of the shaft toward the direction away from the fixed cam by the action of the cam surface, so that the contact form of the cam surface is one. It reaches the part contact state.

From this stage, when the lid is further opened, the cam surface of the sliding cam passes over the top of the cam surface of the fixed cam, and the sliding cam moves toward the fixed cam by the urging force of the urging means. This moving force is converted by the cam surface into a force for rotating the lid via the sliding cam.

According to the second aspect of the present invention, the fixed cam is brought into contact with a sliding member for imparting sliding resistance to the fixed cam. Therefore, regardless of the rotation angle of the lid, the position of the lid can be stopped at a desired position, which is convenient for use.

According to the third aspect of the present invention, the fixed cam is formed with a storage portion in which an O-ring as a sliding member can be stored, and the stopper presses the O-ring toward the storage portion.

Generally, in the case of a solid shaft, meat is stolen because it breaks after molding. However, the storage unit is formed by this stolen structure, and a stopper is stored in the storage unit to make the hinge unit compact. Can be. Further, by using the O-ring as the sliding member, fine adjustment of the sliding resistance can be easily performed by changing the hardness or the wire diameter of the O-ring.

According to the fourth aspect of the invention, the outer peripheral surface of the fixed cam is provided with a convex portion along the axial direction. On the other hand, on the inner peripheral wall of the shaft portion provided in the first housing, a concave portion is formed in which the convex portion protruding from the outer peripheral surface of the fixed cam can be engaged. Here, the fixed cam is attached to the shaft of the first housing,
The shaft is fixed to a shaft provided in the second housing. Thereby, the first housing and the second housing can be relatively rotated.

As described above, in order to engage the fixed cam with the shaft of the first housing, the recess is formed in the shaft and the protrusion is formed in the fixed cam. The thickness of the fixed cam other than the convex portion can be reduced as compared with the case where the recess is provided. Therefore, the weight of the hinge unit can be reduced.

According to the fifth aspect of the present invention, a cylindrical case is inserted into the shaft and is prevented from coming off with respect to the shaft, and a guide portion is formed on the inner peripheral surface of the case. .

A slide cam and a locking cam are inserted through the shaft, and the slide cam is housed in the case. A guided portion is formed on the slide cam, guided by a guide portion formed on the case, so that the slide cam can move in the axial direction of the case and is prevented from rotating.

On the other hand, the locking cam has a cylindrical shape and is rotatable with respect to the shaft. A stopper is fitted to one end of the shaft to prevent the locking cam from coming off. Then, the slide cam is urged toward the locking cam by the urging means housed in the case.

Here, a cam surface is provided on an abutting surface of the slide cam and the locking cam, and the cam surface comes into contact with and separates from the entire surface by a relative rotation angle between the slide cam and the locking cam. The contact form up to the part contact is taken.

According to the invention, the cover covering the other end of the shaft and the case are locked by the locking means.

According to the seventh aspect of the present invention, the case is provided with the locked portion. On the other hand, a locking claw that can be locked to the locked portion is formed on the cover. Thereby, the cover can be easily locked to the case, so that workability is good.

According to the eighth aspect of the present invention, an engaging portion is provided on the outer peripheral surface of the case along the axial direction. On the other hand, an engaged portion to which an engaging portion formed on the case can be engaged is formed on the inner peripheral wall of the shaft portion provided in the third housing. Here, the third housing and the fourth housing are relatively rotated by attaching the case to the shaft of the third housing and fixing the locking cam to the shaft provided on the fourth housing. It is possible.

According to the ninth aspect of the present invention, the shaft portion of the fourth housing is provided with a locking recess in which a locking piece provided at an end of the locking cam can be locked. For this reason, the locking cam can be locked to the fourth housing only by locking the locking piece to the locking recess, so that it is simpler and workable as compared with the case where the fixing screw is screwed and fixed. good.

[0032]

1 and 2 show a portable telephone 12 using a hinge unit 10 (see FIG. 4) according to the present embodiment.

The main body 14 (first housing) of the mobile phone 12
Is provided with a substantially prismatic support 16 at the end of the support member.
Both sides of the support 16 and the dial 18 are cut down so that when the lid 20 (second housing) is closed, the outer surface of the main body 14 and the lid 20 are flush.

The support 16 (shaft) and the support 16
The hinge unit 10 is attached to a bifurcated, substantially cylindrical shaft 22 (shaft) protruding from the lid 20 so as to sandwich both ends of the hinge unit 10. The shaft 22 is rotatable by the support 16. Supported.

As shown in FIGS. 2 to 4, a substantially oval-shaped flange 26A is formed at one end of the cylindrical shaft 26. on the other hand,
An annular flange 30 is provided at one end of the cylindrical fixed shaft 28.
Is formed, and a flange 26A
Is formed in a substantially oval fitting recess (not shown) into which the can be fitted.

The inner diameter of the fixed shaft 28 is substantially the same as the outer diameter of the shaft 26. The shaft 26 is press-fitted into the fixed shaft 28, the flange 26A is fitted into the fitting recess, and the fixed shaft 28 is The shaft 26 is integrated. Since the flange 30 and the fitting concave portion have a substantially oval shape, the shaft 26 and the fixed shaft 28 do not relatively rotate.

The flange 30 has a pair of notches 30A. Here, a cylindrical storage portion 24 (shaft portion) having an open surface facing the support 16 is formed on the shaft body 22, and the storage portion 24 is formed on an inner peripheral surface of the storage portion 24.
Projection 24A protrudes along the axial direction of.

The notch 30A of the flange 30 is engaged with the projection 24A, and the fixed shaft 28 is fixed to the shaft 22 and is prevented from rotating with respect to the shaft 22. For this reason,
When the shaft body 22 is rotated, the fixed shaft 28 and the shaft 26
Also rotate together.

On the outer peripheral surface of the fixed shaft 28, the fixed shaft 2
A pair of engagement grooves 28A are formed along the axial direction of No. 8. On the other hand, a spring 32
(To be described later) is inserted, and a substantially cylindrical sliding cam 34 can be engaged.

The sliding cam 34 includes a large diameter portion 36 and a small diameter portion 38, and the large diameter portion 36 has a cam surface 37 (described later). On the other hand, an engagement protrusion 38A that can be engaged with the engagement groove 28A is provided on the inner peripheral surface of the small diameter portion 38, so that the sliding cam 34 can move in the axial direction of the fixed shaft 28 and The rotation is stopped with respect to the fixed shaft 28.

A spring 32 is mounted on the outer peripheral surface of the small diameter portion 38. One end of the spring 32 has a step portion 38B composed of the small diameter portion 38 and the large diameter portion 36.
, And the other end of the spring 32 contacts the flange 30 of the fixed shaft 28. Thereby, the sliding cam 34
Is urged away from the flange 30.

As described above, by mounting the spring 32 on the outer peripheral surface of the small diameter portion 38, the inner diameter of the spring 32 can be increased. For this reason, the spring 32
Can be increased.

Here, a substantially cylindrical fixed cam 40 corresponding to the sliding cam 34 is inserted through the other end of the shaft 26, and is rotatable with respect to the shaft 26.
For this reason, the urging force of the spring 32 is applied to the cam surface 37 of the sliding cam 34 and the cam surface 41 formed on the fixed cam 40.
The force is converted into a force for rotating the lid 20 via the sliding cam 34 (described later). Therefore, the torque can be increased by increasing the urging force of the spring 32.

On the other hand, on the outer peripheral surface of the fixed cam 40, a plurality of guide projections 40A are protruded along the axial direction of the fixed cam 40. The guide convex portion 40A is engaged with a guide concave portion 42A recessed along the axial direction of the storage portion 42 on an inner peripheral surface of a cylindrical storage portion 42 (shaft portion) formed on the support 16 and described later. It is possible. The guide recess 42A has substantially the same length as the guide protrusion 40A, and the fixed cam 40 moves until the guide protrusion 40A reaches the end of the guide recess 42A.

As described above, the guide convex portion 40A formed on the fixed cam 40 and the guide concave portion 4 formed on the accommodation portion 42
By engaging with 2A, fixed cam 40 is prevented from rotating with respect to storage portion 42.

Further, as compared with the conventional case where the guide groove is formed on the outer peripheral surface of the fixed cam, the thickness of the portion other than the guide projection 40A of the fixed cam 40 can be reduced. 12 can be reduced in weight.

On the other hand, a cam surface 41 is formed on one end of the fixed cam 40 in correspondence with the cam surface 37, and a recess 40C (housing portion) is provided on the other end.

Here, a substantially cylindrical stopper 44 is press-fitted into the other end of the shaft 26, and the stopper 44 and the shaft 26 are integrated, and the fixed cam 40 and the like are prevented from coming off. For this reason, workability is better than in the case where the fixing screw is screwed into the main body to prevent the parts from coming off.

The stopper 44 is formed with a flange 44A, and the stopper 44 is fixed at a position where the flange 44A and the end face of the shaft 26 are flush. The outer diameter of the flange 44A is smaller than the inner diameter of the recess 40C provided in the fixed cam 40. Further, the length of the stopper 44 is substantially the same as the depth of the concave portion 40C, and the stopper 44 can be stored in the concave portion 40C.

For this reason, the end face of the stopper 44 is
When the stopper 44 is in contact with the bottom surface of the
When the shaft 22 is stored in the shaft 2C and the shaft 22 rotates, the shaft 2
6, the stopper 44 rotates. At this time, the tip surface of the stopper 44 slides on the bottom surface of the recess 40C. Thereby, sliding resistance is given to the shaft body 22.

On the other hand, an O-ring 46 as a sliding member is mounted on the outer peripheral surface 44B of the stopper 44.
The O-ring 46 slightly protrudes from the outer peripheral surface 44B in a state of being mounted on the outer peripheral surface 44B of the stopper 44, and is pressed by the stopper 44 toward the storage section 40C.

Therefore, when the shaft body 22 is rotated, the stopper 44 is rotated via the shaft 26, and the O-ring 46 is rotated.
Slides in the recess 40 </ b> C, and a sliding resistance is given to the shaft 22.

As described above, by applying the sliding resistance to the shaft body 22, when the lid 20 is rotated, it can be stopped regardless of the rotation angle (free stop function).
It is convenient for use. Further, by changing the hardness, the wire diameter, and the like of the O-ring 46, the sliding resistance applied to the shaft body 22 can be finely adjusted.

In this embodiment, the fixed cam 40 has the guide projection 4
Since 0A is formed, the fixed cam 40 needs a shaft portion for forming the guide convex portion 40A separately from the cam portion on which the cam surface 41 is formed.

If this shaft portion is formed as a peeled shaft, the shaft will break after molding, so that it is necessary to steal the meat. The hinge unit 10 can be made compact by storing the stopper 44 in the part of the meat stealing.

In the hinge unit 10 according to the present embodiment, since the sliding cam 34 and the fixed cam 40 themselves can be relatively rotated without being attached to the main body 14 and the lid 20, a load test and a durability test are performed as the hinge unit 10. be able to.

Since the mechanical values such as the torque required for rotating the sliding cam 34 and the fixed cam 40 themselves relative to each other are determined by the hinge unit 10, the variation in the torque of the mobile phone 12 is small. .

The hinge unit 10 thus quality-controlled is attached to the main body 14 and the lid 20. At this time, the shaft 26 is fixed to the storage section 24, and
A fixed shaft 28 is provided, and a fixed cam 40 is provided on the storage section 42 side. However, the cam surface 41 of the fixed cam 40 protrudes from the storage part 42 and is stored on the storage part 24 side.

Here, the operation of the sliding cam 34 and the fixed cam 40 will be described.

The sliding cam 34 is provided with a cam surface 37 which can be engaged with the cam surface 41 of the fixed cam 40.
As shown in (A), (B) and (C), when the lid 20 is closed, the top 3 of the cam surface 37 of the sliding cam 34 is closed.
7A and the valley portion 41A of the cam surface 41 of the fixed cam 40
The cam surfaces 41, 37 are not engaged with each other over the entire surface.

That is, the sliding cam 34 urged by the spring 32 is connected to the cam surface 37 of the sliding cam 34 and the fixed cam 4.
By the butting of the cam surfaces 41 of 0, a force in the direction of arrow F is applied by the axial thrust received from the spring 32.

As a result, the axial thrust of the spring 32 is converted into a rotational force about the shaft 26 to rotate in a direction to close the lid 20. For this reason, the lid 20 can cover the main body 14 without rattling, and
Do not open it upside down.

Next, FIGS. 3 and 6 (A), (B),
As shown in (C), when the lid 20 is opened in the direction of the arrow M against the urging force of the spring 32, the top 37 A of the cam surface 37 and the top 41 of the cam surface 41 abut, and the sliding cam 34 is brought into contact. Is pushed back by the fixed cam 40 to the back of the storage section 24. In this state, the lid 20 is stopped.

Then, the lid 20 is opened to a position where the top 41A of the cam surface 41 of the fixed cam 40 and the edge 37B of the cam surface 37 of the sliding cam 34 meet. Here, the sliding cam 34 and the fixed cam 40 are formed of synthetic resin, and a click feeling is obtained at the position where the top 41A of the cam surface 41 and the edge 37B of the cam surface 37 abut (in the present embodiment). In this state, the opening angle of the lid 20 is θ = 15.
0 °).

Next, as shown in FIGS. 7A, 7B, and 7C, the top 41A of the cam surface 41 slides on the slope to the valley 37A, and the lid 20 naturally moves in the M direction. Open (open angle θ = 160 °).

That is, the sliding cam 34 urged by the spring 32 is connected to the cam surface 37 of the sliding cam 34 and the fixed cam 4.
Due to the butting of the 0 cam surface 41, a force in the direction of arrow Q is applied by the axial thrust received from the spring 32. As a result, the axial thrust of the spring 32 is converted into a rotational force about the shaft 26 to rotate in a direction to open the lid 20.

As described above, in this embodiment, the hinge unit 10 can be designed to be compact by forming the cam surfaces 41 and 37 on the abutting surfaces of the sliding cam 34 and the fixed cam 40, respectively.

In this case, the hinge units 10 are provided on the left and right sides of the main body 14 and the lid 20. However, a plurality of hinge units 10 are not necessarily required. Even ten pieces can have a rotation function in a state without sufficient backlash.

In the present embodiment, the sliding cam 34 is
Although the fixed cam 40 is provided on the main body 14, it is needless to say that the fixed cam 40 may be provided in reverse. In addition, when a simple hinge structure is considered instead of the hinge unit 10 considering the simplicity of assembly, one side of the shaft body 22 is supported by a shaft material, and the other side of the shaft body 22 is slid. The cam 34 and the fixed cam 40 may be arranged so that the spring 32 applies the urging force.

Further, the fixed shaft 28 was fitted to the shaft 26, and the sliding cam 34 was engaged with the fixed shaft 28.
A pair of guide walls are provided on the inner peripheral surface of the small diameter portion 38 of the sliding cam 34 along the axial direction so as to protrude, and guide protrusions which can be inserted between the guide walls are formed on the outer peripheral surface of the shaft 26. Thus, the shaft and the sliding cam may be engaged.

The opening angle of the lid 20 can be adjusted by changing the shape of the cam surface 41. Also, the mobile phone 12 using the lid 20 rotatable with respect to the main body 14 has been described. However, since a product using the hinge unit 10 may be used, the same effects as those of the present invention can be obtained for a foldable mobile phone. Can be

Further, the present invention is not limited to a mobile phone,
It can be used for those having a fixed opening angle, such as the lid of AV equipment.

Next, a hinge unit according to a second embodiment will be described. The description of the same contents as in the first embodiment is omitted.

As shown in FIG. 8, the hinge unit 9
The shaft 50 used for 6 is composed of a large diameter portion 50A and a small diameter portion 50B, and an annular flange 50C is formed at an end on the large diameter portion 50A side.

A dome-shaped cover 52 can be mounted on the flange 50C. An annular concave portion 52A is formed on the back surface of the cover 52,
0C can be fitted.

As shown in FIG. 9, a pair of recesses 56 are formed on the outer peripheral surface of the cover 52, and the recesses 56 are flat surfaces. A pair of locking pieces 58 extend from the edge of the recess 56.

On the outer surface of the locking piece 58, a locking claw 58A is provided.
Are formed, and the locking claw 58 </ b> A
And can be locked to a locked piece 60 formed in a case 54 described later.

The case 54 has a substantially cylindrical shape, and a flange 53 is formed at one end. The cover 52 can be attached to the flange portion 53. A through hole 53 </ b> A is formed in the shaft core of the flange 53. The large diameter portion 50A of the shaft 50 fits into the through hole 53A, and the shaft 50 and the case 54 are integrated.

A notch 62 is formed in the flange 53 so as to extend from the end face 53B to the outer peripheral face 53C.
5 are provided. A locked piece 60 extends from an edge 62A on the outer peripheral surface 53C side of the notch 62. The locked piece 60 has a length slightly protruding from the end face 53B, and a locked claw 60A protrudes from the inner surface of the locked piece 60.

The outer diameter of the flange portion 53 is
Is slightly smaller than the outer diameter dimension of the cover 52 so that the peripheral edge portion 52B of the cover 52 and the end face 53B of the flange portion 53 can abut.

On the other hand, the separation distance between the edge portions 62B on the side of the end surface 53B of the notch portion 62 is the inner surface 58 of the pair of locking claws 58A.
B is slightly larger than the separation distance. Further, the distance between the opposing recesses 56 is slightly smaller than the distance between the inner surfaces 60 </ b> B of the locked pieces 60.

Therefore, when the peripheral edge 52B of the cover 52 comes into contact with the end face 53B of the flange 53, the locking claw 5
8A is inserted into the space 55 formed by the notch 62.

Here, the locked piece 60 is cantilevered and elastically deformable. Therefore, when the locking claw 58A comes into contact with the locked claw 60A, the locked piece 60 elastically deforms and expands its diameter, and the locking claw 58A passes through the locked claw 60A and is locked. When it comes into contact with the inner surface 60B of the lock 60, the locked piece 60 is restored, and the locking claw 58A is locked by the locked claw 60A.

On the other hand, as shown in FIG. 10, a convex portion 64 is formed on the inner peripheral surface of the case 54 along the axial direction. A slide cam 68 can be inserted into the case 54.

Here, the slide cam 68 has a cam surface 7
0 (described later) is formed, and a through hole 68A is formed in the shaft core. The shaft 50 (see FIG. 8) can be inserted into the through hole 68A.

A pair of slide pieces 72 stand upright from the back surface of the slide cam 68.
The shape of the outer surface 2 is formed along the inner peripheral surface of the case 54 and is substantially the same as the shape of the portion other than the convex portion 64.

Therefore, when the slide piece 72 is inserted into the case 54, the slide piece 7 is
2 is restricted. Therefore, the slide cam 68 is movable in the axial direction with respect to the case 54 and is prevented from rotating.

On the other hand, a pair of recesses 66 are formed on the outer peripheral surface of the case 54, and the recesses 66
It can be engaged with a guide portion 75 (see FIG. 11) projecting along the axial direction on the inner peripheral surface (see FIG. 11).

The width of the guide portion 75 is slightly larger than the width of the concave portion 66 formed in the case 54.
Is guided along the guide portion 75 into the storage portion 74 and is prevented from rotating with respect to the storage portion 74. When the flange 53 of the case 54 contacts the end face 75 </ b> A of the guide part 75, the case 54 is positioned in the axial direction of the storage part 74.

The slide piece 72 of the slide cam 68
The spring 76 can be stored between the two, and one end of the spring 76 is in contact with the bottom surface of the case 54. On the other hand, the other end of the spring 76 is
8 is in contact with the back surface. Therefore, the slide cam 68 is urged by the spring 76 in a direction in which the slide cam 68 is pushed out of the case 54.

Here, a through-hole 79 formed in a shaft portion of a substantially cylindrical locking cam 78 can be inserted into the small diameter portion 50B of the shaft 50 shown in FIG.
Is rotatable with respect to the shaft 50.

The locking cam 78 has a cam surface 80 (to be described later) formed thereon.
It is arranged to face. On the outer peripheral surface of the locking cam 78,
A pair of recesses 81 are formed, and can be engaged with a guide portion 84 protruding along the axial direction on the inner peripheral surface of the storage portion 82 formed facing the storage portion 74 shown in FIG. Has become.

A positioning portion 86 is projected from the back of the guide portion 84, and the guide portion 84 and the positioning portion 86 are provided.
A gap t is provided between them. On the other hand, as shown in FIG.
Is erected.

On the outer surface of the locking piece 88, a locking claw 88A is provided.
Project from the outer peripheral surface of the locking cam 78. A guide portion 84 (see FIG. 11) and a positioning portion 86 (see FIG. 11) projecting from the storage portion 82 (see FIG. 11)
) And a gap t provided therebetween.

On the other hand, a cylindrical stopper 90 is fitted to the end of the small diameter portion 50B of the shaft 50, and is fixed to the shaft 50. Therefore, the locking cam 78 does not come off from the storage portion 82.

The outer diameter of the stopper 90 is slightly larger than the inner surface 88B of the locking piece 88, and the locking piece 58 is elastically deformable. For this reason, when the locking cam 78 is stored in the storage portion 82, the locking piece 58 is reduced in diameter, the distal end of the locking piece 58 contacts the positioning portion 86, and the locking piece 58 is restored, The locking claw 88A is locked between the guide portion 84 and the positioning portion 86 (gap t).

Here, the slide cam 68 and the locking cam 78
Will be described.

As shown in FIGS. 12 and 13, when the lid 92 is rotated, the cam surface 70 of the slide cam 68 is rotated.
The contact form between the lock cam 78 and the cam surface 80 is different. As shown in FIGS. 14A, 14B and 14C, when the lid 92 is closed, the cam surface 70 of the slide cam 68 is closed.
Of the cam surface 80 of the locking cam 78
A is not meshed, and the cam surfaces 70 and 80 are not in contact with each other over the entire surface.

That is, the slide cam 68 urged by the spring 76 causes the cam surface 70 of the slide cam 68 and the cam surface 80 of the locking cam 78 to abut against each other. Is loaded.

As a result, the axial thrust of the spring 76 is converted into a rotational force about the shaft 50 to rotate in a direction to close the lid 92. For this reason, the lid 92 can cover the main body 94 without rattling, and
Do not open it upside down.

Next, as shown in FIGS. 12 and 15, when the lid 92 is opened in the direction of arrow M against the urging force of the spring 76, the top 70A of the cam surface 70 and the top 80B of the cam surface 80 are opened. As a result, the slide cam 68 is pushed back from the locking cam 78 and pushed back to the rear of the storage section 74. In this state, the lid 92 is stopped.

Then, the top portion 70A of the cam surface 70 of the slide cam 68 and the edge portion 80 of the cam surface 80 of the locking cam 78
When the lid 92 is opened to the position where it comes into contact with C, a click feeling is obtained (in this embodiment, the opening angle of the lid 92 is set to θ = 150 ° in this state).

Next, as shown in FIGS. 16 (A), (B) and (C), the top 70A of the cam surface 70 slides on the slope, goes to the valley 80A of the cam surface 80, and the lid 92 moves naturally. And open in the M direction (open angle θ = 160 °).

That is, when the slide cam 68 urged by the spring 76 abuts the cam surface 70 of the slide cam 68 and the cam surface 80 of the locking cam 78, the force in the direction of arrow Q is exerted by the axial thrust received from the spring 76. Is loaded. As a result, the axial thrust of the spring 76 is
The rotation force is converted to a rotational force which is about to rotate in a direction in which the lid 92 is opened around 0.

[0105]

According to the present invention, the above configuration is provided.
According to the fifth aspect of the present invention, the sliding cam and the fixed cam can be rotated relative to each other without being attached to the main body and the lid, so that a mechanical value such as a necessary torque is determined. For this reason, the torque can be managed as a hinge unit, and there is little variation as a product. In addition, workability is better than in the case where the fixing screw is screwed into the main body to prevent the parts from coming off.

According to the second aspect of the present invention, the lid can be stopped at a desired position regardless of the rotation angle of the lid, which is convenient in use. According to the third aspect of the present invention, the hinge unit can be made compact by housing the stopper in the housing. Further, by using the O-ring as the sliding member, fine adjustment of the sliding resistance can be easily performed by changing the hardness or the wire diameter of the O-ring.

According to the fourth aspect of the present invention, it is possible to reduce the thickness of the fixed cam other than the convex portion as compared with the case where the concave portion is provided in the fixed cam. Therefore, the weight of the hinge unit can be reduced. According to the sixth and seventh aspects of the present invention, the cover can be easily locked to the case, so that workability is good. According to the ninth aspect of the present invention, it is simple and has good workability as compared with the case where the fixing screw is screwed in and fixed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a lid of a mobile phone including a hinge unit according to an embodiment is opened.

FIG. 2 is an exploded perspective view of the hinge unit according to the first embodiment.

FIG. 3 is a perspective view of the hinge unit according to the first embodiment, in which a mounting portion is partially cut away.

FIG. 4 is a perspective view of the hinge unit according to the first embodiment, in which a mounting portion is partially cut away.

FIG. 5A is a side view of the hinge unit according to the first embodiment,
(B) is a side view in a state where a lid of the mobile phone is closed, and (C) is a developed view showing a meshing state of a cam surface.

FIG. 6A is a side view of the hinge unit according to the first embodiment,
(B) is a side view of the state in which the lid of the mobile phone is partially opened,
(C) is a development view showing a meshing state of the cam surface.

FIG. 7A is a side view of the hinge unit according to the first embodiment,
(B) is a side view of the state where the lid of the mobile phone is fully opened, (C).
FIG. 4 is a developed view showing a meshing state of the cam surface.

FIG. 8 is an exploded perspective view of a hinge unit according to a second embodiment.

FIG. 9 is an exploded perspective view of a cover and a case used in the hinge unit according to the second embodiment.

FIG. 10 is an exploded perspective view of a case and a slide cam used in the hinge unit according to the second embodiment.

FIG. 11 is a perspective view illustrating a shape of a storage section to which a hinge unit according to a second embodiment is attached.

FIG. 12 is a perspective view of the hinge unit according to the second embodiment, in which a mounting portion is partially cut away.

FIG. 13 is a perspective view of the hinge unit according to the second embodiment, in which a mounting portion is partially cut away.

14A is a side view of a hinge unit according to a second embodiment, FIG. 14B is a side view of the mobile phone with a lid closed, FIG.
(C) is a development view showing a meshing state of the cam surface.

15A is a side view of the hinge unit according to the second embodiment, FIG. 15B is a side view of the mobile phone with a cover partially opened, and FIG. 15C is a developed view showing a meshed state of the cam surface. It is.

16A is a side view of the hinge unit according to the second embodiment, FIG. 16B is a side view of the mobile phone with a cover fully opened,
(C) is a development view showing a meshing state of the cam surface.

FIG. 17 is an exploded perspective view of a conventional hinge structure.

FIG. 18 is a sectional view showing a conventional hinge structure.

[Explanation of symbols]

 Reference Signs List 10 hinge unit 14 main body (first housing) 16 support (shaft) 20 lid (second housing) 22 shaft (shaft) 32 spring (biasing means) 34 sliding cam 37B edge (cam surface) 37 cam surface 37A valley portion (cam surface) 37A top portion (cam surface) 40A guide convex portion (convex portion) 40C concave portion (storage portion) 40 fixed cam 41 cam surface 41A valley portion (cam surface) 41 top portion (cam surface) 41A Top (cam surface) 42A Guide recess (recess) 44 Stopper 46 O-ring (sliding member) 52 Cover 54 Case 58A Locking claw (locking means) 58 Locking piece (locking means) 60A Locked claw ( Locking means) 60 locked piece (locking means) 66 recess (engaging portion) 68 slide cam (sliding cam) 70 cam surface 70A top portion (cam surface) 75 guide portion (engaged portion) 76 spring ( Attached Means) 78 engaging cam 80C edge portion (cam surface) 80 cam surfaces 80A valley (cam surface) 80B top (cam surface) 88 locking piece 90 stopper 92 lid 94 body 96 hinge unit t gap (engagement recesses)

Claims (9)

[Claims] A sliding cam that is prevented from rotating with respect to the shaft and is movable in the axial direction of the shaft and is prevented from falling off the shaft; and a cylindrical fixed cam that is inserted into the shaft and rotates. An urging means for urging the sliding cam toward the fixed cam; a stopper fitted to the shaft to prevent the fixed cam from coming off; and an abutting surface formed between the fixed cam and the sliding cam. And a cam surface which comes into contact with and separates from the sliding cam and the fixed cam depending on the relative rotation angle and takes a contact form from full contact to partial contact. 2. The hinge unit according to claim 1, further comprising: a sliding member that comes into contact with the fixed cam and imparts sliding resistance to the fixed cam. 3. The fixed cam is provided with O as the sliding member.
The hinge unit according to claim 2, wherein a storage portion capable of storing the ring is formed, and the O-ring is pressed toward the storage portion by the stopper. 4. A hinge structure comprising the hinge unit according to any one of claims 1 to 3, wherein an outer peripheral surface of the fixed cam according to any one of claims 1 to 3 extends along an axial direction. A convex portion is provided on the inner peripheral wall of the shaft portion provided on the first housing, a concave portion engageable with the convex portion is recessed, and the fixed cam is attached to the shaft portion; The shaft according to any one of claims 1 to 3 is fixed to a shaft portion provided in,
A hinge structure wherein the first housing and the second housing are relatively rotatable. 5. A cylindrical case having a guide portion formed on an inner peripheral surface while being inserted into the shaft and being prevented from falling off with respect to the shaft, and being inserted through the shaft and guided by the guide portion. A guided portion is formed, housed in the case, and a slide cam movable in the axial direction of the shaft; a cylindrical locking cam rotatably inserted through the shaft; and locking the slide cam. A biasing means for biasing toward the cam side; a stopper fitted to one end of the shaft to prevent the locking cam from coming off; a slide cam formed on an abutting surface between the slide cam and the locking cam And a cam surface which contacts and separates depending on the relative rotation angle between the locking cam and the locking cam and takes a contact form from full contact to partial contact. 6. A cover for covering the other end of the shaft,
The hinge unit according to claim 5, further comprising: locking means for locking the case and the cover. 7. The locking means comprises a locked portion formed on the case, and a locking claw formed on the cover and lockable on the locked portion. The hinge unit according to claim 6, wherein 8. A hinge structure provided with the hinge unit according to any one of claims 5 to 7, wherein the hinge structure is engaged with an outer peripheral surface of the case according to any one of claims 5 to 7 along an axial direction. A mating portion is provided, an engaged portion engageable with the engaging portion is formed on an inner peripheral wall of a shaft portion provided in the third housing, and the case is attached to the shaft portion. A hinge, wherein the locking cam according to any one of claims 5 to 7 is fixed to a shaft provided on the body, and the third housing and the fourth housing are relatively rotatable. Construction. 9. The shaft according to claim 8, wherein the shaft portion of the fourth housing is provided with a locking recess in which a locking piece provided at an end of the locking cam can be locked. Hinge structure.