JP2002227825A - Hinge device of portable equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge device of portable equipment capable of reducing a product cost by simplifying parts to improve workability and assembling workability increasing part accuracies, and lowering production costs. SOLUTION: A connection shaft assembly 3 is passed through a fixed side tubular member 1a and a movable side tubular member 2a coaxially arranged in series to assemble the movable side tubular member 2a rotatably relative to the fixed side tubular member 1a. The holding part of a rotating engagement member is engraved in either one of the spacer 8 and the installation plate 9 of the connection shaft assembly 3, a recess allowing the rotating engagement member to disengage therefrom is engaged in the other at a specified rotating position, and a passage for the rotating engagement member is formed on the same circular position as a recess engraved position for connecting the recesses. The spacer 8 is always pressed against the installation plate 9 side by an energizing means so that a locking mechanism capable of moving the rotating engagement member in the rotating direction and allowed to be positionally fixed at a specified recess engraved position can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge device for a portable device applied to a folding portion such as a laptop computer, a notebook computer, and a foldable portable telephone.

[0002]

2. Description of the Related Art Conventionally, portable equipment having a folding part such as a laptop or notebook personal computer, a foldable portable telephone, etc., particularly a portable equipment such as a portable telephone which requires a very small hinge device. In the device, various structural devices have been devised to prevent the cover from being accidentally closed when the cover of the device is opened and used. For example, a method of preventing abnormal closing by a locking means using a locking claw, a magnet, or the like. There is a method of preventing abnormal closing by providing an uneven portion to be engaged at the butted end surface of the fixed disk and the movable disk and engaging within a predetermined angle range.

[Problems of the prior art] In such a conventional technology, design, mounting restrictions, high cost,
There is a problem in that there are difficulties in various points such as operability and the like, and the number of processing steps and the number of assembling steps are increased due to the complexity of the shape, and the manufacturing cost is increased.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and a technical problem set specifically to solve this problem is to simplify each part. Accordingly, it is an object of the present invention to provide a hinge device for a portable device that improves workability and assemblability, increases component accuracy, reduces manufacturing cost, and reduces product cost.

[0005]

According to a first aspect of the present invention, there is provided a portable device hinge device according to the present invention, which is arranged in a coaxial and serial manner. The movable cylindrical member is rotatably combined with the fixed cylindrical member by penetrating a connecting shaft assembly to the fixed cylindrical member and the movable cylindrical member,
A case member having an open end, wherein the connection shaft assembly is non-rotatably fitted to the fixed cylindrical member, and a shaft end cover, which is non-rotatably fitted to the movable cylindrical member. A shaft member which is coaxially and rotatably inserted into a shaft center position of the case member, and a tip end portion of which is non-rotatably fitted to a center portion of the shaft end cover; A biasing means fitted in the member, a spacer rotatably and axially movably fitted to the shaft member, and a tip end of the shaft member interposed between the spacer and the shaft end cover. And a plurality of rotation engaging members interposed between the mounting plate and the spacer. On one side, the holding part of the rotation engagement member is engraved, and on the other side, Forming a recess capable of engaging and disengaging the rotation engagement member at a predetermined rotation position, and forming a passage for the rotation engagement member on the same circumference as a depression formation position connecting between the depressions; The spacer is always pressed against the mounting plate by means to form a locking mechanism capable of moving the rotary engaging member in the rotating direction and fixing the position at a predetermined recessed position. Things.

According to a second aspect of the present invention, in the hinge device for a portable device, the rotation engaging member is a hard sphere made of steel, ceramics, a sintered body, or the like.

In the hinge device for a portable device according to a third aspect of the present invention, the detachable recess is formed as a long recess extending in the circumferential direction on the same circumference as the recess engraving position. It is characterized by the following.

According to a fourth aspect of the present invention, in the hinge device for a portable device, the detachable recesses are formed at regular intervals on the same circumference as the recess engraving position for the number of the rotational engagement members used. It is characterized by having.

According to a fifth aspect of the present invention, in the hinge device for a portable device, the urging means is formed in a coil spring, and the coil spring is coaxially fitted on the outer peripheral side of the shaft member. It is characterized by.

According to a sixth aspect of the present invention, there is provided a hinge device for a portable device, wherein a friction plate is interposed between a head of the shaft member and the case member.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following embodiments of the present invention, a case where a main component is made of plastic and a rotary engaging member is a hard sphere will be described. This embodiment is specifically described for better understanding of the gist of the invention, and does not limit the contents of the invention unless otherwise specified.

[Structure] A hinge device for a portable device according to this embodiment, as shown in FIGS. 1 and 2, enables one end of each of fixed and movable parts 1 and 2 to be relatively rotatable. Connecting. The connecting shaft assembly 3 is inserted (inset) into the fixed cylindrical member 1a and the movable cylindrical member 2a which are coaxially and serially arranged in this connection portion, and the fixed cylindrical member is inserted. The movable cylindrical member 2a is rotatably combined with the cylindrical member 1a.

The connecting shaft assembly 3 includes a fixed-side cylindrical member 1a.
A case member 4 for accommodating a connection shaft or a spring part having an open end, which is non-rotatably fitted to the inside, and a movable-side cylindrical member 2a.
A shaft end side cover 5 which is non-rotatably fitted to the shaft, and a shaft which is coaxially and rotatably inserted into the shaft center position of the case member 4 and has a front end portion non-rotatably fitted to the center of the cover 5. Member 6
A coil spring 7 as a biasing means which is coaxially externally fitted on the outer peripheral side of the shaft member 6 and which is internally fitted into the case member 4; and is rotatable and axially movable on the shaft member 6. A spacer 8 fitted to the outside as possible, a mounting plate 9 interposed between the spacer 8 and the cover 5 and non-rotatably fitted to the distal end of the shaft member 6, and the mounting plate 9 and the spacer 8; A plurality of balls 10 serving as rotation engaging members interposed between the end members of the case member 4 and the head 6 of the shaft member 6
and a friction plate 11 formed of hard rubber or the like, which is interposed between the shaft member 6 and the shaft member 6 to increase frictional resistance against rotation of the shaft member 6.

On one of the opposing surfaces of the spacer 8 and the mounting plate 9, depressions 13, 13 are provided as holding portions for the ball 10 pierced in the deep hole, and on the other surface are predetermined rotation positions. At the same time, the recesses 14, 14 to which the ball 10 can be disengaged are formed, and the passage 15 of the ball 10 is formed on the same circumference as the recess forming position connecting the respective recesses. A locking mechanism 12 is formed which is always pressed to the side 9 and is capable of moving the ball 10 in the rotating direction and fixing the position at a predetermined recessed position.

Then, as shown in FIG.
Alternatively, the depression 14 (the ball 10 can be disengaged) formed in the mounting plate 9 is formed as a longer depression extending in the circumferential direction on the same circumference as the depression engraving position. The length of the recess 14 in the circumferential direction is determined from the axis of the spacer 8 or the mounting plate 9.
The center angle formed by two straight lines connecting to the center of the ball 10 located at both ends of the ball 10 is formed at an angle of about 10 to 15 °. Further, the depressions 14 are formed at equal intervals on the same circumference as the depression engraving position for the number of balls 10 used,
A passage 15 is formed for the ball 10 consisting of a shallow groove which is slightly recessed on the same circumference as the position where the depression 14 connects the depressions 14.

At this time, the relationship between the movement of the ball 10 and the rotational torque of the hinge device is the maximum when the ball 10 comes out of the depression 14 as shown in FIG.
4, the torque drops to the torque when passing through the passage 15, moves to the position of the next depression 14 with a constant torque, and when falling into the next depression 14, the torque further decreases further and the bottom of the depression 14 Until it reaches the lowest value, the torque rises when moving at the bottom of the depression 14, moves on the passage 15 with a constant torque until it reaches the other end of the depression 14, and comes out of the depression 14 again from the other end. Sometimes maximum torque.

As shown in FIGS. 1, 5 and 6, the case member 4 is formed in a substantially cylindrical shape with a bottom, and a round hole 4a serving as a bearing for the shaft member 6 is provided at the center of the bottom end surface. The accommodation space 4b of the coil spring 7 is formed on the opening side from the position where the round hole 4a is formed, and one end of the spacer 8 is slidable in the axial direction at the tip of the formation position of the accommodation space 4b. A fitting portion 4c to be internally fitted is formed, and a protruding portion 8c as a detent member for the spacer 8 at the time of spacer fitting is slidably fitted in an axial direction at an end on the side where the fitting portion 4c is formed. Forming a fitting groove 4d.
A head housing portion 4e into which the head 6a of the shaft member 6 and the friction plate 11 are fitted is drilled at the end opposite to the side where the spring housing space is formed from the formation position of a. A rectangular parallelepiped detent member 4f, which non-rotatably fits into a concave portion 1b formed in the cylindrical member 1a, is provided to protrude outward from the outer peripheral surface. This part is preferably made of a thermoplastic, general-purpose engineering plastic, or special engineering plastic.
OM (boriacetal) is preferable because of good moldability, light weight and high strength.

As shown in FIGS. 1 and 7, the cover 5 has a square hole 5a having a square cross section at the center and a diameter increasing toward the surface opposite to the opposing surface of the spacer 8. A hole 5b is formed, and grooves 5c, 5c projecting from the inner wall of the movable-side cylindrical member 2a toward the center and extending in the thickness direction to be fitted to the projecting portions 2b, 2b extending in the axial direction are formed on the outer peripheral portion. It is engraved at two places at equal intervals, and the size of the circular portion at the center of the spacer 8 is fitted on the surface facing the spacer 8 and the depth is substantially the same as the thickness of the spacer 8. A recess 5d having a circular cross section is formed, and grooves 5e, 5e having a constant width are formed on the outer peripheral side of the recess 5d in the radial direction for fitting the protrusions 9a, 9a of the mounting plate 9. This part is desirably made of a steel material, especially electroless Ni
Plated SK (carbon tool steel) is preferred because it has high strength and high durability and is inexpensive.

As shown in FIG. 8, the shaft member 6 has a disk-shaped head 6a formed at one end of a round bar, and a square bar 6b having a square vertical cross section at the other end. A small hole 6c is formed coaxially deeper on the tip end surface of the rod portion. This part is desirably made of a steel material. In particular, electroless Ni-plated SK (carbon tool steel) is preferable because it has high strength and high wear resistance and is inexpensive.

As shown in FIG. 9, the coil spring 7 is formed so that its outer shape is large enough to be accommodated in the accommodating space 4b of the case member 4 and its inner diameter is large enough to fit outside the shaft member 6. The shape of the spring ends 7a, 7a can be applied to either a non-ground shape (part A in the figure) or a ground shape (part B in the figure). This component is preferably a wire made of a spring material, and in particular, Ni-plated SWPB (phosphor bronze steel wire) is preferable because it has high elasticity, high strength, high durability, and is inexpensive.

As shown in FIG. 10, the spacer 8 has a cylindrical outer shape, and a hole 8 through which the shaft member 6 penetrates at the center.
a is bored coaxially with the outer shape, a hole 8b is formed on one end surface side, which serves as a seat for internally fitting the end of the coil spring 7, coaxially with the outer shape. Projections 8c, 8c as detent members each having a substantially rectangular parallelepiped shape and projecting outward at two locations at intervals and fitted in fitting grooves 4d of case member 4
And the other end face is engraved in a semi-spherical shape slightly deeper than the radius of the ball 10 at two circumferentially equal intervals on the outer peripheral side of the position where the hole 8a is drilled, and the ball 10 is rotatable. Are formed. This part is desirably made of plastic like the case member. In particular, POM (polyacetal) has good moldability, is lightweight, and has a ball 1
This is preferable because the frictional resistance with zero is small and the strength is high.

As shown in FIG. 11, the mounting plate 9 has a plate-like projection having a shape and a size that can be fitted into the groove 5e of the cover 5 at two locations on the outer periphery of the disk-shaped material at equal intervals on the circumference. Part 9
a, 9a protruding, a square hole 9b in which the square rod portion 6b of the shaft member 6 is fitted is formed in the center portion, and two recesses are formed on the outer peripheral side of the square hole 9b at equal intervals on the circumference. 14, 14 are formed, and small holes 9 c, 9 c penetrating to the opposite side are formed in the center of each of the recesses 14, 14. A passage 15 for the ball 10 having a concave is formed. This part is preferably made of steel material,
In particular, SK (carbon tool steel) or SUS (stainless steel) plated with electroless Ni is preferable because it has high strength, high wear resistance and corrosion resistance, and is inexpensive.

The recess 14 forms a recess curved in the circumferential direction similarly to the passage 15 (see FIG. 3) or a recess 14 having a curved surface similar to the ellipsoidal surface (see FIG. 11). 2, when each ball 10, 10 is depressed 14,
In order to reduce the impact force falling to the bottom 14, the shape is gradually lowered toward the bottom. In particular, when the depression 14 having the ellipsoidal surface shape shown in FIG. 11 is formed, the ball 10 gradually falls toward the central portion. Becomes very low, the change in the torque curve becomes gradual and smooth, and it is possible to avoid giving a shocking click sensation. Become like

[Assembly] As shown in FIGS. 12 and 13, the components constituting such a connecting shaft are assembled so that the fixed-side tubular member 1a and the movable-side tubular member 2a are relatively opposed to each other. The connecting shaft assembly 3 is formed so as to be rotatably connected. That is, the friction plate 11 is externally fitted into the round hole 4a of the case member 4 from the side of the head housing portion 4e, and the shaft member 6 which is moved to the head 6a side is inserted therethrough, and the coil spring 7 is externally fitted to the shaft member 6. And insert the ball 1 into the spacer 8
0 and 10 are fitted into the respective depressions 13 and 13 to be held, and the hole 8b is directed toward the coil spring 7 and the hole 8 is formed in the shaft member 6.
a and the fitting grooves 4d, 4d of the case member 4.
The spacers 8 are fitted to the case member 4 movably in the axial direction while receiving the urging force of the coil spring 7 by fitting the protruding portions 8 c, 8 c into the ball members 10, 10 held by the spacer 8. Depression 14, 14 or passage 1
5 is fitted to the square rod portion 6b of the shaft member 6 so that the hole 5b comes into contact therewith.
e, the square holes 5a of the cover 5 are fitted to the square bar portions 6b of the shaft member 6 so that the projecting portions 9a of the mounting plate 9 are fitted to the mounting member 9e.

After that, the conical tip of a punch (not shown) is inserted into a small hole 6c drilled in the tip end surface of the square bar portion 6b of the shaft member 6, and the punch head is hit with a hammer and The end of the portion 6b is pushed open to cover 5 and the mounting plate 9
Is completed to complete the connection shaft assembly 3. Normally, when the opening angle of the turning-side component 2 is 180 °, the initial position of the ball 10 of the connecting shaft assembly 3 falls into the recess 14, and the turning-side component 2 turns. As a result, the ball 10 comes out of the depression 14, moves along the passage 15 to the position of the other depression 14, falls into the other depression 14, and stops the movement of the ball 10. Thereby, depression 1
The change in the magnitude of the rotational torque generated when entering or exiting the vehicle 4 is transmitted to the user, and the click feeling is effectively transmitted. When the opening angle of the rotating part 2 is within 180 °, the ball 10 of the connecting shaft assembly 3 is in the closed position where the rotating part 2 is in close contact with the fixed part 1. Passage 15 of mounting plate 9
And the ball 10 falls into the recess 14 when the rotating part 2 is rotated to the fully open position. The opening angle is determined by the ball initial position of the passage 15 and the position of the depression 14,
The position of the ball 10 on the passage 15 is determined by the maximum opening angle of the rotating part 2 with respect to the fixed part 1.

[Effects] In the embodiment configured as described above, when the movable part 2 is opened, the cylindrical member 2
a rotates relatively to the opening direction of the cylindrical member 1a on the fixed side, and the grooves 5c, 5c locked to the protruding portions 2b, 2b rotate, whereby the cover 5 rotates, and 5e,
When the projections 9a, 9a fitted into 5e rotate, the mounting plate 9 also rotates, so that the balls 10 held by the spacers 8 come out of the recesses 14, 14 of the mounting plate 9, and
After moving along the passage 15 and reaching the other depression 14, 14,
According to the size or the degree of inclination of the depressions 14, 14, it falls into the central part, the rotational torque decreases, the resistance is lost, and reaches the central part of the depressions 14, 14, and does not move unless the rotational torque is increased again. The rotation stops with a strong click feeling.

At this time, if the rotation of the movable part 2 is stopped during the period from full opening to full closing, the spacer 8 and the mounting plate 9 are stopped.
The ball 10 sandwiched between the coil spring 7
Of the shaft member 6 and the bottom surface of the head receiving portion 4e of the case member 4 between the coil spring 7 Is pressed and pressed by the urging force of the shaft member 6, the mounting plate 9, and the cover 5 in which the mounting plate 9 is fitted.
Function as a brake for stopping the rotation of the movable part, and effectively fix the position of the movable part 2. Then, when the movable part 2 is to be rotated from that position again, the friction plate 11 increases the initial operation resistance, and resists the movable part 2 from being carelessly operated. For this reason, even if rotation of the movable part 2 is stopped at an arbitrary position, it can be stopped at that position without any trouble, and it can be used without worrying about the opening degree.

Conversely, when the movable part 2 is closed, the cylindrical member 2a is relatively rotated in the closing direction with respect to the fixed cylindrical member 1a, and the groove engaged with the protrusions 2b, 2b. 5c,
By rotating the cover 5c, the cover 5 is rotated. At the same time, the protrusions 9a, 9a fitted in the grooves 5e, 5e are also rotated, so that the mounting plate 9 is also rotated, and the ball 10 held by the spacer 8 is rotated. Moves out of the recesses 14, 14 of the mounting plate 9 and moves along the passage 15 toward the other recesses 14, 14, and when reaching the other recesses 14, 14, the other recesses 14, 14
Depending on the size or degree of inclination, the rotational torque gradually decreases, the rotational torque decreases, and the resistance disappears. After reaching the central portion of the depressions 14, 14, it stops moving and stops unless the rotational torque is increased again. .

As described above, when the ball 10 is opened and closed,
4, 14 and the other depressions 14, 14, and the depression 1
An effective click feeling can be given by moving in and out of the recesses 14 and 14 and the other depressions 14, and further, a click feeling in entering and exiting the ball 10 depends on the size or the degree of inclination of the depressions 14. Change,
It can be set to give a more diverse and smooth click feeling. And depressions 1 arranged at equal intervals on the circumference
When the ball 10 is moved into and out of the portable device 4 and 14, the use of a plurality of connecting shaft assemblies 3 at both ends of the portable device facilitates adjustment such as symmetrical mounting. The assemblability can be improved. By using the ball 10 as a component of the locking mechanism, the shape of each component constituting the locking mechanism can be further simplified, the moldability can be improved, the manufacturing can be facilitated, and the cost can be reduced. Can be reduced. By forming and assembling the components of the connecting shaft assembly 3 coaxially, the rotating part can be formed with high precision, the movement becomes smoother, the usability is improved, and the commercial value can be increased.

[Alternative Embodiment] The above embodiments and examples have been specifically described for easy understanding of the gist of the invention, but are not particularly described because they do not limit the contents of the invention. It does not limit another aspect, and may be changed as appropriate. Several alternative embodiments in this sense that are consistent with the spirit of the invention are described below.

In the above embodiment, the opening angle of the component 2 on the rotating side is set to 180 °, but this angle is set by opening the engraving positions of the depressions 14 and 180 by 180 °. However, the present invention is not limited to this, and each of the depressions 14 may be engraved within 180 ° so that the opening angle of the component 2 on the rotating side may be formed within 180 °. When the opening angle of the component 2 on the rotation side is set within 180 ° by the engraving positions of the depressions 14, 14, the ball 10 of the connecting shaft assembly 3 is dropped into the depression 14 at the initial position. The ball 10 is pivoted in a direction in which the component 2 on the pivot side opens.
Escapes from the depression 14, moves along the passage 15 to the position of the other depression 14, reaches the other depression 14, and falls, so that the movement of the ball 10 is stopped and the set 180 °
The opening angle is within. Thereby, the operation of the component 2 on the rotating side can give a click feeling within an opening angle of 180 ° and is fully opened, so that a hinge device that is easy to operate and easy to handle can be realized.

[0032]

As described above, in the hinge device of the portable device according to the first aspect of the present invention, each component constituting the connecting shaft assembly can be formed coaxially except for the rotational engagement member, and the component accuracy can be improved. In addition to being able to increase the cost, it is possible to simplify each part, improve workability and assemblability, reduce manufacturing cost, and reduce product cost. When the connecting shaft assembly is fitted to the fixed-side and movable-side tubular members in a non-rotatable manner, the rotation engaging member of the connecting shaft assembly rotates and moves between the spacer and the mounting plate. The mounting plate can be relatively rotated with respect to the spacer, and the fixed-side tubular member and the movable-side tubular member can be easily rotated. The rotation engaging member interposed and sandwiched between the engagement and disengagement of the dent gives a click feeling to clearly indicate the open / close position.

In the hinge device for a portable device according to the second aspect, the rotation engaging member is a rigid sphere,
The opening / closing operation becomes smooth, the durability is high, and the reliability can be improved.

In the hinge device for a portable device according to the third aspect of the present invention, since the shape of the recess is formed to be long in the circumferential direction, the rotation engaging member is formed so as to gradually fall into the bottom of the recess. Therefore, the impact in the opening and closing operation can be set softly, and the usability can be improved.

Further, in the hinge device for a portable device according to the fourth aspect, since the depressions are provided at equal intervals on the same circumference, the opening and closing operation can be made the same feeling of use, and the operability is improved. In addition, when a plurality of connecting shaft assemblies are provided at both ends of the portable device or the like, a plurality of connecting shaft assemblies are provided, and adjustment such as symmetrical installation is facilitated, and assemblability can be improved.

Further, in the hinge device for a portable device according to the fifth aspect, the biasing means is formed as a coil spring fitted externally to the shaft member, so that the rotation engaging member presses through the spacer. , A uniform pressing force can be given, and the opening / closing operation can be made smoother and the usability can be improved.

In the hinge device for a portable device according to the present invention, a friction plate is interposed between the head of the shaft member and the case member. The intermediate torque can be increased by the resistance, and the movable-side tubular member can be effectively stopped at any position other than the depression forming position.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view showing a hinge device according to an embodiment of the present invention.

FIG. 2 is a perspective explanatory view showing an example of a portable device according to the embodiment of the present invention.

FIG. 3 is an explanatory view showing an example of a detachable recess of a rotation engagement member in a connection shaft assembly of a hinge device according to an embodiment of the present invention, wherein (A) is a front view showing an arrangement of the recess;
(B) is a longitudinal sectional view showing a sectional shape of the depression.

FIG. 4 is an explanatory diagram showing a relationship between an operation including a depression of a rotation engagement member and a rotation torque for the shaft member in a connection shaft assembly of the hinge device according to the embodiment of the present invention.

FIG. 5 is an external view showing a case member in the connecting shaft assembly of the hinge device according to the embodiment of the present invention, and FIG.
Is a front view, (B) is a left side view, (C) is a right side view,
(D) is an upper plan view.

FIG. 6 is a longitudinal sectional view showing a case member of the same connection shaft assembly.

FIGS. 7A and 7B are explanatory views of the shape of the cover of the connecting shaft assembly, wherein FIG. 7A is a front view, FIG.
(C) is a bottom plan view, and (D) is a longitudinal sectional view.

FIGS. 8A and 8B are explanatory views of a shape of a shaft member of the same connection shaft assembly, wherein FIG. 8A is a front view and FIG. 8B is a right side view.

FIGS. 9A and 9B are explanatory views of the shape of the coil spring in the connecting shaft assembly, in which FIG. 9A is a front view of a coil spring having a non-ground end, and FIG. 9B is a front view of a coil spring having a ground end; It is.

FIGS. 10A and 10B are explanatory views of the shape of the spacer in the connecting shaft assembly, in which FIG. 10A is a front view, FIG. 10B is a left side view, FIG. 10C is a right side view, and FIG. is there.

11A and 11B are explanatory views of a shape of a mounting plate in the connecting shaft assembly, in which FIG. 11A is a cross-sectional view taken along the line BB ′, FIG. 11B is a left side view, and FIG.

FIG. 12 is a longitudinal sectional view showing a case where a ball is located in a passage in the connecting shaft assembly according to the first embodiment;

FIG. 13 is a longitudinal sectional view showing a case where the ball is located in the recess in the connecting shaft assembly according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed part 1a Cylindrical member 1b Depression 2 Movable part 2a Cylindrical member 2b Projection 3 Connection shaft assembly 4 Case member 4a Round hole 4b Housing space 4c Fitting part 4d Fitting groove 4e Head receiving part 4f Detent member 5 Cover 5a Square hole 5b Countersink hole 5c Groove 5d recess 5e Groove 6 Shaft member 6a Head 6b Square rod 6c Small hole 7 Coil spring 8 Spacer 8a Hole 8b Hole 8c Projection 8d Recess 9 Mounting plate 9b square hole 9c small hole 10 ball 11 friction plate 12 locking mechanism 13 depression 14 depression 15 passage

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Minoru Hayashi 435 Shimodonooka, Iida-shi, Nagano F-term in Heiwa Watch Co., Ltd. (Reference) 3J105 AA12 AB23 AB48 AB49 BB52 DA13 DA22 DA32 4E360 AA02 AB42 BB02 BB12 EC14 EC15 ED04 ED23 ED28 GA02 GB26 GB46 GC14

Claims (6)

[Claims] 1. A movable-side cylindrical member is inserted into a fixed-side cylindrical member and a movable-side cylindrical member arranged coaxially and in series, and the movable-side cylindrical member is fixed to the fixed-side cylindrical member. The connection shaft assembly is rotatably combined with a member, and the connection shaft assembly is turned around a case member having an open end and a movable side cylindrical member which is non-rotatably fitted into the fixed cylindrical member. A shaft end cover which is immovably fitted therein, and a shaft member which is coaxially and rotatably inserted into a shaft center position of the case member and non-rotatably fits a front end portion to the center of the shaft end cover. A biasing means provided around the shaft member and fitted inside the case member; a spacer rotatably fitted to the shaft member so as to be movable in the axial direction; and a spacer between the spacer and the shaft end cover. A mounting plate interposed in the shaft member and non-rotatably fitted to the distal end of the shaft member; It is formed as an assembly comprising a plurality of rotation engagement members interposed between a plate and the spacer, and a holding portion of the rotation engagement member is engraved on one of the spacer and the mounting plate. On the other side, at a predetermined rotation position, a recess is formed by which the rotation engaging member can be disengaged, and the passage of the rotation engaging member is formed on the same circumference as the recess forming position connecting between the depressions. The spacer is constantly pressed against the mounting plate side by the urging means to form a locking mechanism capable of moving the rotation engaging member in the rotation direction and fixing the position at a predetermined recessed position. A hinge device for a portable device. 2. The method according to claim 1, wherein the rotation engaging member is steel, ceramics,
2. A hard sphere made of a sintered body or the like.
A hinge device for a portable device as described in the above. 3. The portable device according to claim 1, wherein the detachable recess is formed as a long recess extending in the circumferential direction on the same circumference as the recess engraving position. Hinge device. 4. The portable device according to claim 1, wherein the detachable depressions are formed at equal intervals on the same circumference as the positions where the depressions are engraved with respect to the number of the rotational engagement members used. Equipment hinge device. 5. The hinge for a portable device according to claim 1, wherein said biasing means is formed in a coil spring, and said coil spring is coaxially fitted on an outer peripheral side of said shaft member. apparatus. 6. The hinge device for a portable device according to claim 1, wherein a friction plate is interposed between a head of said shaft member and said case member.