JP2003028135A - Hinge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge device with a simple structure suitable for a middle- folding appliance such as a cellphone, having a small number of components. SOLUTION: This hinge device is provided with a tubular case-like base 1 and a shaft 2 disposed in an axial position inside the base 1. The base 1 or the shaft 2 is axially displaceable or turnable relative to the shaft 2 or the base 1. The hinge device is provided with a spring 3 provided between the base 1 and the shaft 2. When the base 1 and the shaft 2 relatively turn around the axis of the shaft 2, the spring 3 acts such that torsional torque is generated, and energizes the base 1 and the shaft 2 such that a folding part inner face of a base end and an end face of the shaft 2 are axially pressure-contacted. Friction generated between the pressure-contacted faces stops the base 1 and the shaft 2 in an arbitrary angle position within a prescribed rotation range against the torsional torque. Recessed and projecting engagement means formed in the pressure-contacted faces lock a turn in a specific turn position of the base 1 and the shaft 2. The locking of the recessed and projecting means is released by pushing an end part of the base 1 or the shaft 2 projected from an exterior component of the cellphone or the like, and the shaft 2 turns up to an allowable maximum position by the spring 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge device used for a connecting and rotating shaft portion of a device such as a mobile phone in which an exterior component can be folded and folded in two, and particularly, a hinge having a simple structure and a small number of equipment items. Regarding the device.

[0002]

2. Description of the Related Art Such a hinge device is used by being fitted into a rotating shaft of a folding device of a folding device such as a mobile phone, and as one example, the hinge device relatively rotates. There is a hinge device in which two cam plates are opposed to each other and are pressed against each other by a spring to generate a rotational frictional force to stop the cam plate at an arbitrary angle.

Further, a torsion spring is provided in the hinge device, which is locked in a twisted state while biasing the spring to a certain angle, and unlocked to deploy the device by the returning force of the torsion spring. There is a hinge device that can be deployed by so-called one-touch.

[0004]

Such a hinge device is an indispensable member for recent miniaturized mobile phones, and more recently, there have been many opportunities to communicate using the display screen of the mobile phone. It is not enough to prepare two fully folded and fully closed states, and an intermediate stop is also required. Moreover, mobile phones are in the process of miniaturization, and the hinge device itself is inevitably required to be miniaturized. However, since the complicated function is required as described above, the structure of the hinge device, the number of parts, and the number of assembling steps are not necessarily simple. For example, a friction member for an intermediate stop, a cam member for bringing the locked state, a push button for releasing the locked state, etc. will be prepared to satisfy the required functions, which will increase the cost. It is a factor. The present invention provides a hinge device having such a tendency,
It is an object of the present invention to provide a technique that has a simple structure, a small number of parts, and a good operation feeling.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a hinge device having a structure in which two members are rotatably connected to each other so as to be openable and closable. A shaft disposed at an axial position in the base, the base or the shaft being rotatable and axially displaceable with respect to the shaft or the base, and being mounted between the base and the shaft, When the base and the shaft rotate relative to each other about the axis of the shaft, the base and the shaft are twisted to generate torque, and the surface of the flange portion provided between the inner surface of the bent portion at the end of the base and the shaft. And a spring for urging the pressure contacting member in the axial direction to stop the relative rotation at an arbitrary angular position within a predetermined rotation range against the torsion torque by the friction generated on the pressure contact surface. It can, and is solved by the formed concavo-convex locking means on the contact face and so as to lock the rotation in a particular rotational position of the base and the shaft.

Further, according to the present invention, the above-mentioned problem is that in the preceding paragraph, the base and the shaft are locked by pressing the end of the base or the shaft to release the concave-convex locking means, and the torsional torque of the spring causes It will be solved by returning to the old state.

Further, according to the present invention, the above-mentioned problem is solved by the present invention, in which the pressing of the end portion of the base or the shaft is connected to each other so as to be rotatable so as to be openable and closable. The problem is solved by pressing a portion of the base or the shaft facing the outside from the end.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The hinge device of the present invention comprises a base,
It has a simple structure consisting of a shaft and a spring.

The base has a cylindrical case shape, and a shaft which is rotatable and axially displaceable is arranged in the base. Since the rotation and the displacement here are relative, it can be translated into a base that is rotatable and axially displaceable with respect to the shaft. Then, a spring is mounted between the base and the shaft so as to generate a torque when the both are relatively rotated about the shaft axis and to urge the two in the axial direction.
By using a coil spring as the spring, it is possible to have the functions of both a torsion spring and a compression spring.

The torsional torque and the compression force of the spring are set to proper values, and a predetermined rotation range is caused by the friction generated on the pressure contact surface between the inner surface of the bent portion formed by bending the base end and the end surface of the flange portion formed in the middle of the shaft. The lid can be stopped at an arbitrary position against a twisting torque acting in a direction to open the lid at an arbitrary angular position.

By doing so, the degree of opening of the lid of the attachment target device such as a mobile phone can be made arbitrary.

Further, the rotation is locked at a specific rotation position between the base and the shaft by the locking means formed of the relationship between the concave portion and the convex portion formed on the pressure contact surface. For example, the lid of a mobile phone or the like is locked in a closed state. In order to release this lock and shift the lid to the open state, the concave and convex locking means is released by pressing the end of the base or shaft projected from the exterior parts such as mobile phones, and the so-called one-touch by the spring. You can open the lid with.

As described above, in the hinge device of the present invention, the inner surface of the base end and the end surface of the shaft are utilized to perform the free stop mechanism and the lock mechanism at the pressure contact surfaces, so that the cam member and No special member such as a friction member is required. Further, since the unlocking mechanism also presses the end of the base or the shaft protruding from the exterior parts of the mobile phone, this also eliminates the need for a special member such as a push button, and makes it a hinge with a simple structure. The device can be obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS All the drawings are for explaining the embodiments of the present invention, and FIG. 1 is a sectional view for explaining the basic structure of the hinge device of the present invention.

Reference numeral 1 denotes a base as a member constituting a housing of the hinge device, which is formed of a metal such as stainless steel into a cylindrical shape, one end of which is open and the other end of which is open, but which holds a shaft described later. The claw-shaped bent portion 1a for bending is bent at a right angle from the edge toward the center and is formed at two symmetrical positions. Details will be described later.

Reference numeral 2 is a shaft. Similar to the base 1, it is made of metal such as stainless steel and has a cylindrical rod shape. A flange-like flange portion 2a is formed near one end, and a tip end thereof is a prismatic portion 2b for coupling with a device to be attached. To form. Further, a small diameter portion 2c is formed at the other end portion for rotating with a stopper described later as a bearing. The shaft 2 is rotatable inside the cylindrical shape of the base 1.
Details will be described later.

Reference numeral 3 is a spring. The coil spring is formed by winding an elastic wire material such as SWPA into a coil shape and has two functions as a compression spring and a torsion spring. Therefore, a predetermined gap is set between adjacent coils so that they can be compressed. Linear locking portions are respectively formed at both ends for twist locking, but the details will be described later.

Reference numeral 4 denotes the stopper, which is formed of a metal plate, is fitted into the opening end of the base 1 and fixed, receives the small diameter portion 2c of the shaft 2 and functions as a bearing, and one end of the spring 3 is provided. Lock. Details will be described later.

2 to 5 are detailed views of the base 1, FIG. 2 is a front view, FIG. 3 is a top view, FIG. 4 is a partially omitted side view, and FIG. 5 is a bottom view. In each figure, 1a
Is a claw-shaped bent portion for locking the shaft 2 as described above, and is formed at two symmetrical positions from the edge toward the center and bent at a right angle. 1b is a notch formed at the end on the opening side and has a cross shape at the edge.
The stoppers 4 are formed in places, and the predetermined portions of the stoppers 4 are fitted into the stoppers 4 and fixed by caulking. Reference numeral 1c is a slit 1c provided at a predetermined length from the end edge on which the bent portion 1a is formed. The slit-like portion 1c provided on the attachment target device is fitted into the slit 1c to regulate the rotation while attaching. It is a thing.

6 to 9 are detailed views of the shaft 2. FIG. 6 is a front view, FIG. 7 is a top view, and FIG. 8 is a bottom view.
FIG. 9 is a sectional view. In each drawing, 2a is the flange-shaped flange portion, 2b is also a prismatic portion for coupling with a device to be mounted as described above, and 2c is a small diameter portion for rotating with the stopper 4 as a bearing as described above. 2d is a large-diameter portion into which the spring 3 is fitted, 2d
Reference character e denotes an arc portion projecting on the surface of the collar portion 2a in a circular arc shape in the direction of the prismatic portion 2b, 2f denotes a concave portion which does not protrude between the circular arc portions 2e, and 2g denotes a boundary between the circular arc portion and the concave portion. A right angled step portion, 2h is a sloping portion having a gentle inclination formed as a mass boundary between an arc portion and a concave portion, and 2k is a small diameter portion 2
A groove portion 2m formed with a radius from the c side to the end surface of the collar portion 2a as a depth is a C ring groove provided in the prismatic portion 2b for attaching the hinge device to the attachment target device by the C ring or the E ring. The arcuate portion 2e, the concave portion 2f, the step portion 2g, and the inclined portion 2h are formed in pairs at symmetrical positions with respect to the axial center. Also, the recess 2
The width of f (the length of the circular arc) is set to a dimension that sufficiently accepts the width dimension of the bent portion 1a of the base 1.

10 to 12 are detailed views of the spring 3, FIG. 10 is a front view, FIG. 11 is a top view, and FIG.
2 is a bottom view. In each figure, 3a is a spring 3
A bent portion 3k fitted by fitting one end of the spring 3 into a predetermined hole of the bending stopper 4 in a direction parallel to the axial direction, the other end of the spring 3 is bent in a groove 2k of the shaft 2 in a radial direction orthogonal to the axial direction. It is a straight part that is fitted and attached.

FIG. 13 is a front view of the stopper 4. The disk-shaped outer diameter portion has such a shape that it can be fitted into the inner diameter portion of the base 1, and the protrusions 4b are directed in four directions in a cross shape from the edge.
Are formed at four positions, and the projections 4b are fitted and fixed in the cut portions 1b of the base 1. 4a is a round hole for receiving the bent portion 3a of the spring 3. Reference numeral 4c is a shaft hole that fits the small diameter portion 2c of the shaft 2 and functions as a bearing.

Referring again to FIG. 1, the assembling procedure of the hinge device of this embodiment constituted by the above elements will be described.
The large diameter portion 2d of the shaft 2 is inserted into the inner diameter portion of the spring 3 while the linear portion 3k of the spring 3 is fitted in the groove portion 2k of the shaft 2. The penetration is performed until the straight portion 3k reaches the innermost portion of the groove 2k. In this way, the shaft 2 fitted with the spring 3 is first attached to the base 1 from the prismatic portion 2b.
Of the bent portion 1 of the base 1 by inserting the collar portion 2a into the open end of
Push in until it contacts the inner surface of a. A stopper 4 is fitted on the open end of the base 1. Four protrusions 4b on the stopper 4
Are fitted into the four cut portions 1b of the base 1, respectively. The bent portion 3a of the spring 3 is inserted into the round hole 4a of the stopper 4. The small diameter portion 2c of the shaft 2 is fitted into the shaft hole 4c of the stopper 4. When the spring 3 is attached, initial torsion is not particularly required, but the dimensions are set so as to generate a biasing force by applying a predetermined compression in the compression direction. The stopper 4 is attached with the spring 3 compressed to a predetermined size, and the assembly is completed by caulking the periphery of the notch 1b of the base 1 in which the protrusion 4b of the stopper 4 is fitted.

The outer diameter of the flange portion 2a of the shaft 2 corresponds to the inner diameter of the base 1, and the small diameter portion 2c of the shaft 2 is received by the bearing hole of the stopper 4 and the shaft hole 4c, so that the center of the shaft is stable. It has become a thing.

A state in which the hinge device of this embodiment is attached to the attachment target device will be described with reference to FIGS. 14 and 15. In the present embodiment, a mobile phone in which the device to be attached can be folded into a center-fold type. FIG. 14 is a top view of a foldable mobile phone in a fully opened state, and FIG. 15 is a side view of the same. In both figures, 10 is a hinge device, 11 is a mobile phone main body, and 12 is a main body 11 via a hinge device 10. A lid body that is rotatably attached is a back lid 13 that covers the back surface of the main body 11, and the back lid 13 is attached to the main body 11 with screws 13a. A hinge mounting portion 11a extends from the main body 11, and the hinge device 10 is inserted into a mounting hole formed in the hinge mounting portion 11a. Further, the hinge mounting portion 12a is extended from the lid 12, and the end portion of the hinge device 10 is inserted into the mounting hole provided in the hinge mounting portion 12a. In the present embodiment, the hinge device 10 is used in a pair of left and right with respect to the mobile phone, but one may be provided on only one side.

Although not shown in detail, the main body 11
The base 1 of the hinge device 10 is inserted into the mounting hole of the hinge mounting portion 11a, the shaft 2 is inserted into the mounting hole provided in the hinge mounting portion 12a of the lid 12, and the base 1 has the slit 1c. In addition, the shaft 2 functions as a detent by engaging the rotation restricting means provided in the mounting holes by the prismatic portions 2b. As the rotation restricting means, the slit 1
A protrusion is formed in the mounting hole corresponding to c, and the mounting hole itself is a square hole corresponding to the prismatic portion 2b. The hinge device 10 is detached in the axial direction by the prism 2b of the shaft 2.
This is prevented by fitting a C ring or the like into the C ring groove 2m. When such attachment is performed, the base 1 of the hinge device 10 rotates together with the main body 11 of the mobile phone, and the shaft 2 of the hinge device 10 rotates together with the lid 12 of the mobile phone. I will be with you. Since the main body 11 and the lid 12 rotate or rotate relative to each other, when using a mobile phone, it is not a matter of strictly fixing one and rotating or rotating only the other. In the description of the present embodiment, in order to avoid complication, it is assumed that the main body 11 side is a fixed state and the lid 12 side is rotated.

The insertion depth of the hinge device 10 into the mounting hole is regulated by the depth of the mounting hole. In this embodiment, the hinge device 10 in the state after mounting is at the end of the base 1 as shown in FIG. The portion is made to face outward from the main body 11 or the lid 12 by a dimension P.

In addition, the hinge device 10 is incorporated in a mobile phone by inserting the main body 11 and the lid 12 which are not shown in the drawing.
When the back cover 13 is attached to the back surface of the main body 11 after assembly by screws 13a, the end 12b of the cover 12 and the end 13b of the back cover 13 come into contact with each other as shown in FIG. By touching, the relative angle is 180 degrees to 160
Set to the degree. As described above, the hinge device 1
Since the initial urging force of the spring 3 is zero when assembling 0, the urging force is generated in the spring 3 by setting the main body 11 and the lid 12 at 160 degrees.
The state of FIG. 15 is stably maintained.

The operation of the hinge device of the present invention will be described with reference to the explanatory sectional views shown in FIGS. Figure 1
6 is a state at the time of assembling with the main body 11 and the lid 12 forming 180 degrees, the bent portion 1a of the base 1 is in the recess 2f of the shaft 2, and the end portion is brought into contact with the step portion 2g. It is in a state of being. As described above, in this state, the biasing force of the spring 3 is zero.

FIG. 17 shows the state shown in FIG. 15, that is, the state in which the main body 11 and the lid 12 form 160 degrees, in other words, the state in which the mobile phone is fully opened and is in a general use state. Rotates 20 degrees in the direction of arrow R, the spring 3 is twisted, and the torsion biasing force is generated accordingly. Due to this biasing force, the state where the mobile phone in which the end portion 12b of the lid body 12 and the end portion 13b of the back lid 13 contact each other is opened to the maximum is stably maintained.

FIG. 18 shows the state in which the lid 12 is closed, that is, the state in which the lid 12 is rotated by 160 degrees from the state shown in FIG. When the lid 12 is rotated from the state shown in FIG. 17, the bent portion 1a of the base 1 passes through the inclined portion 2h of the shaft 2, the circular arc portion 2e, the recessed portion 2f on the opposite side, and the stepped portion 2g. Contacted and locked. Since the shaft 2 rotates by 160 degrees, the spring 3 is largely twisted, and the torsion biasing force is generated accordingly. With this urging force, the closed state of the mobile phone is stably maintained.

As described above, the spring 3 always stores the urging force that is compressed in the axial direction and tends to expand. Therefore, by setting this biasing force to an appropriate value, the pressure contact force with which the bent portion 1a of the base 1 abuts the arc portion 2e of the shaft 2 becomes appropriate, and the arc portion 2
It is possible to stop at any position within the range of e.

In order to open the lid 12 from the state in which the mobile phone is closed, the hinge device 10 shown in FIG. 14 has a size P protruding from the end face of the mobile phone, specifically, the base 1 of the hinge device 10. It is the end part of, but press this. A force is applied in the axial direction against the acting force of the spring 3 as a compression spring, and the locked state, which is performed when the bent portion 1a of the base 1 abuts on the stepped portion 2g of the shaft 2, is released. The fully open state of FIG. 17 can be achieved all at once by the urging force of the spring 3 as a torsion spring. It is possible to change from the fully closed state to the fully opened state with a so-called one-touch operation.

In FIG. 19, the bent portion 1a of the base 1
It is developed and illustrated for easy understanding of the concavo-convex relation between the end surface of the collar portion 2a of the shaft 2 and the shaft. The bent portion 1a,
Since the arcuate portion 2e, the concave portion 2f, the step portion 2g, and the inclined portion 2h are formed in a pair at symmetrical positions with respect to the axis center, there are two of them at 180-degree intervals, which complicates the description. , Bent portion 1a ₁ , bent portion 1a
₂ , arc portion 2e ₁ , arc portion 2e ₂ , concave portion 2f ₁ , concave portion 2
Description will be given by assigning reference numerals such as f ₂ , stepped portion 2 g ₁ , stepped portion 2 g ₂ , inclined portion 2 h ₁ , and inclined portion 2 h ₂ .

FIG. 19 (A) corresponds to FIG. 17, and shows the state of the hinge device in a general use state in which the mobile phone is fully opened, and the bent portion 1a ₁ is formed in the recess 2f ₁ and the bent portion 1 is formed.
a ₂ enters the recesses 2f ₂ and the springs 3
Are pressed by the urging force in the compression direction. The arrow T indicates the urging direction of the spring 3, and the arrow S indicates the rotating direction of the shaft 2. From this state, the lid 1 of the mobile phone
To close 2, the lid 12 is manually operated, but this operation causes the shaft 2 to move in the direction of the arrow S against the urging force of the spring 3, so that the bent portion 1a ₁ is inclined 2h.
₁ , the bent portion 1a ₂ passes through the inclined portion 2h ₂ , but due to this inclined portion, the two are brought into a line contact state from surface contact, smooth passage through the step, and effective in preventing backlash. The operation feel is also good.

FIG. 19B shows a state in the process of transitioning from the state of FIG. 17 to the state of FIG. 18, which is the state of the hinge device in the use state in which the mobile phone is intermediately opened. Shaft 2
Along with the rotation, riding arc portion 2e bent portion 1a ₁ on ₁ rides arc portion 2e bent portion 1a ₂ on the _2, because it is pressed by the biasing force of the compression direction of the spring 3 in this state, An intermediate stop of the shaft 2 is also possible, i.e. the lid 12 of the mobile phone can be stopped at the desired position.

FIG. 19C shows a state corresponding to the state shown in FIG. 18, which is the state of the hinge device with the mobile phone closed, and passes over the arc portion 2e _{1 as the} shaft 2 rotates. The recessed portion 2f in which the bent portion 1a ₁ is symmetrically located
Enter the _2, bent portions 1 passing over arc portion 2e ₂
a ₂ enters the concave portion 2 f ₁ at a symmetrical position, and the biasing force of the spring 3 in the torsion direction causes the end of the bent portion 1 a ₁ to abut on the stepped portion 2 g ₂ and the bent portion 1 a 1.
Since the end portion of a ₂ abuts on the stepped portion 2g ₁ and is pressed in this state by the biasing force of the spring 3 in the compression direction, the closed lid 12 is stably held.

In order to open the lid 12 from the closed state of the portable telephone shown in FIG. 19C, the hinge device 10 shown in FIG. 14 as mentioned above is the portion of the dimension P protruding from the end face of the portable telephone. Specifically, the end portion of the base 1 of the hinge device 10 is pressed. A force is applied in the axial direction against the acting force of the spring 3 as a compression spring, and the bent portion 1a ₁ of the base ₁ comes into contact with the stepped portion 2g ₂ of the shaft 2 and the bent portion 1a _{2 is} locked. 17 is released from the engagement with the stepped portion 2g ₁ of the shaft 2, and the fully open state of FIG. 17 can be achieved all at once by the biasing force of the spring 3 as a torsion spring.

In the transition to the fully open state, as in the case of closing the lid body 12, the bent portion 1a ₁ has the inclined portion 2
It passes through h _2, although the bent portion 1a ₃ will pass through the inclined portion 2h _1, both by the inclined portion comprises surfaces in contact with the line contact state, passage of the step is smoothly.

As described above, the hinge device of the present invention has a simple structure, has a small number of parts, and has a good operation feeling when used in a mobile phone or the like.

In the above description, the material used for each member is metal, but synthetic resin or the like having a known technical range can be used. Further, the portion of the dimension P where the hinge device 10 projects from the end surface of the mobile phone which is the attachment target device is the end portion of the base 1 of the hinge device 10, but the attachment is reversed and the end portion of the shaft 2 projects. You can choose to let them do it.

Although the device to which the hinge device of the present invention is attached is a mobile phone as an example, the device is not limited to a mobile phone, and can be widely used in electronic notebooks, small mobile personal computers, and other small electronic devices. You can

[0043]

As described above, according to the present invention, the elements of the free-stop friction mechanism and the lock mechanism are directly formed and used on the pressure contact surface between the base and the shaft forming the hinge device. A hinge device having a very small number of parts and a simple structure can be obtained, which is very effective in terms of parts cost, assembly man-hours, and the like.

Further, since the structure is simple, the entire device can be downsized, which has an effect of contributing to the recent trend of downsizing of electronic equipment.

Furthermore, since the shape of the concave-convex locking means has been devised, when used in electronic equipment, the feeling of opening and closing the lid is good, and a favorable operation feeling can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view illustrating a structure of a hinge device of the present invention.

FIG. 2 is a front view of the base of the hinge device of the present invention.

FIG. 3 is a top view of the base of the hinge device of the present invention.

FIG. 4 is a partial side view of the base of the hinge device of the present invention.

FIG. 5 is a bottom view of the base of the hinge device of the present invention.

FIG. 6 is a front view of the shaft of the hinge device of the present invention.

FIG. 7 is a top view of the shaft of the hinge device of the present invention.

FIG. 8 is a bottom view of the shaft of the hinge device of the present invention.

FIG. 9 is a cross-sectional view of the shaft of the hinge device of the present invention.

FIG. 10 is a front view of a spring of the hinge device of the present invention.

FIG. 11 is a top view of the spring of the hinge device of the present invention.

FIG. 12 is a bottom view of a spring of the second hinge device according to the present invention.

FIG. 13 is a front view of the stopper of the hinge device of the present invention.

FIG. 14 is a top view of a mounted state of the hinge device of the present invention.

FIG. 15 is a side view of a mounted state of the hinge device of the present invention.

FIG. 16 is a sectional view for explaining the operation of the hinge device of the present invention.

FIG. 17 is a sectional view for explaining the operation of the hinge device of the present invention.

FIG. 18 is a sectional view for explaining the operation of the hinge device of the present invention.

19 (A), (B), and (C) are operation explanatory views of the hinge device of the present invention.

[Explanation of symbols]

1 base 2 shafts 3 springs 4 stopper 10 Hinge device 11 (mobile phone) body 12 Lid (of mobile phone) 13 Mobile phone back cover

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3J105 AA02 AA03 AA04 AA14 AA15                       AB02 AB11 AB22 AB24 AB46                       AB48 AB49 AC06 BA05 BB03                       BB07 BB33 BB44 BB52 BC14                       DA05 DA13 DA22 DA32                 4E360 AA02 AB42 BB02 BB12 BB27                       BC05 EC14 EC15 ED04 ED23                       ED28 GA02 GB26 GC14

Claims (3)

[Claims] 1. A hinge device having two members rotatably connected to each other so as to be openable and closable, wherein a cylindrical case-shaped base and a shaft arranged at an axial position in the base are provided. , The base or shaft is
It is rotatable and axially displaceable with respect to the shaft or the base, and is mounted between the base and the shaft, and twists when the base and the shaft relatively rotate about the shaft of the shaft. A spring is provided which acts so as to generate torque and which urges the inner surface of the bent portion of the base end portion and the surface of the collar portion provided in the middle of the shaft so as to make pressure contact in the axial direction. By friction, the relative rotation can be stopped at an arbitrary angular position within a predetermined rotation range against the torsion torque, and the base and the shaft can be stopped by the concave and convex locking means formed on the pressure contact surface. The hinge device is characterized in that the rotation is locked at a specific rotation position of the. 2. The lock between the base and the shaft is such that the concave and convex locking means is released by pressing the end of the base or the shaft, and the base and the shaft are relatively rotated by the torsional torque of the spring. The hinge apparatus according to claim 1, wherein the hinge apparatus is a hinge. 3. The pressing of the end portion of the base or the shaft,
It is characterized in that the end face of the base or the shaft is pressed from the end face of either of the two members that are rotatably connected to each other and are openable and closable. The hinge device according to claim 2.