JPH0597152A - Opening and closing mechanism rotary lid or the like - Google Patents

Abstract

PURPOSE:To stop the rotating action of a rotary lid or the like in any desired position, impart a rotating torque not less than a predetermined value in the opposite direction to release the engagement of the lid so as to permit its rotation in the opposite direction and lighten its closing action. CONSTITUTION:A rotary damper 1 containing a first rotary shaft, a one-way clutch and a viscous liquid is provided near one end 31 of a rotary lid 3. Near the other end 32 of the rotary lid 3 is provided a both-way clutch 2 having a second rotary shaft so disposed as to hinder the rotation of the lid in one direction in the condition of being rotatable in the opposite direction and impart a rotating torque not less than a predetermined value in the opposite direction to permit the rotation of the lid in the opposite direction. The rotary lid 3 is supported by the first and second rotary shafts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can prevent the rotation of a rotary lid or the like in the reverse direction at any position of opening or closing operation, and by applying a rotation torque of a predetermined value or more, the position can be prevented. The present invention relates to an opening / closing mechanism for a rotary lid or the like, which is capable of rotating in the opposite direction from, and which can absorb a drop impact caused by free rotation of the rotary lid or the like.

[0002]

2. Description of the Related Art Revolving lids and revolving doors used for laptop personal computers, pianos, western-style toilets, office furniture, etc. that open from bottom to top around a rotating shaft are 90 to
Although it is provided so as to be vertically rotatable within a rotation angle range of about 120 degrees, a cam type locking device has been conventionally used as a device for stopping these rotary lids and the like when they are opened to a predetermined position. Are known.

In this locking device, for example, when the rotary lid is opened up to a predetermined angle, it is locked and stopped by a cam, and when the rotary lid is to be closed thereafter, the rotary lid is slightly raised. The structure is such that the lock of the cam is released by means of which the rotary lid closes downward.

[0004]

However, since this cam type locking device has a structure that locks only when the rotary lid or the like is opened to a predetermined position set in advance, it can be locked at any position. There is a problem that you can not.

Further, since the above-mentioned rotary lid and the like become free-falling rotating objects when closed, unless the user closes them with a hand or the like until the end of the closing operation, the immovable portion (base) is the final point of the closing rotation. There is an inconvenience that it may collide with the slab and generate a large impact sound and cause damage.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to rotatably support a rotary lid and the like and to stop the rotary operation at an arbitrary position. Providing an opening / closing mechanism such as a rotating lid that can release the lock easily by freely applying a rotation torque of a predetermined level or more and can freely rotate in the opposite direction and reduce the impact at the end of the closing operation. The purpose is to do.

[0007]

In order to achieve the above object, an opening / closing mechanism such as a rotary lid according to the present invention has a predetermined rotation with respect to an immovable portion via a rotary shaft disposed near both end portions. In an opening / closing mechanism such as a rotary lid mounted so as to be opened and closed vertically within an angular range, a hollow rotary shaft rotatably loaded into an outer cylinder via a viscous liquid and a part of the hollow rotary shaft. A first rotating shaft disposed inside the hollow portion of the hollow rotating shaft so as to be projected to the outside of the cylindrical body, and a one-way disposed between the hollow rotating shaft and the first rotating shaft. A clutch, the protruding portion of the first rotating shaft is provided on either one of the immovable portion and the rotating lid, and the outer cylinder is provided on the other of the immovable portion and the rotating lid. Rotate in one direction with the rotary damper fixed near the one end of the rotary lid and the casing. In the active state, the rotation in the other direction is blocked, and the rotation torque in the other direction is given by applying the rotation torque in the other direction or more, and at the same time, the rotation torque in the other direction or more is given. Unless otherwise provided, it has a second rotating shaft arranged so as to partially project from the casing so that rotation in one direction can be prevented, and the protruding portion of the second rotating shaft rotates with the immovable portion. A bidirectional locking clutch, in which the casing is fixed to the other of the immovable portion and the rotary lid or the like on either one of the lid and the like, and is disposed near the other side end of the rotary lid and the like, It is characterized by having.

[0008]

With this structure, when the rotary lid or the like is rotating in the opening direction with respect to the immovable portion (base), the second rotary shaft is freely rotatable in the bidirectional locking clutch. When a rotational torque is applied in the reverse direction, that is, in the closing direction, the rotation of the second rotation shaft is blocked.

On the other hand, when a torque greater than a predetermined value is applied to the closing direction, the second rotating shaft is free to rotate in the closing direction, contrary to the above. At this time, when the hands attached to the rotary lid are released, the rotary lid becomes a free-falling rotating body, but the viscous resistance of the rotary damper exerts a predetermined braking force, so that the rotary lid closes slowly. Operate.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in more detail based on an embodiment shown in the drawings. In the figure, 1 is a rotary damper which constitutes an opening / closing mechanism such as a rotary lid according to the present embodiment, and 2 is a bidirectional locking clutch. In addition,
This embodiment is an embodiment applied to an opening / closing type personal computer as shown in FIG. 1, 3 is a rotating lid of an opening / closing type personal computer having a display incorporated therein, and 4 is a main body which is a stationary part in which a CPU and a keyboard are incorporated. Indicates a part.

As shown in FIGS. 2 and 3, the rotary damper 1 has a flange 10a at the bottom for fixing it to the main body 4.
And a hollow rotating shaft 12 housed and loaded in the outer cylindrical body 10 via a viscous liquid 11 such as grease.
A first rotary shaft 13 that is rotatably inserted in the hollow portion of the hollow rotary shaft 12; and an inner peripheral surface 12a of the hollow rotary shaft 12 that contacts the peripheral surface of the first rotary shaft 13. The one-way clutch 14 interposed between the first rotary shaft 1 and the
3 has an insertion hole 15a through which the first rotary shaft 1 can be inserted.
And a lid member 15 attached to the upper portion of the outer cylindrical body 10 by projecting the front end portion 13a of the outer cylindrical body 3 outward. In addition,
Reference numerals 16 and 17 denote sealing packings arranged between the upper surface or the lower surface of the hollow rotary shaft 12 and the bottom surface of the lid member 15 or the outer cylindrical body 10. The viscous liquid 11 is the sealing packing 1
It is filled on the outside of 6,17.

The one-way clutch 14 allows free rotation without engaging with the first rotary shaft 13 when the first rotary shaft 13 rotates in the opening direction of the rotary lid 3.
Any material may be used as long as it has a function of engaging with the first rotary shaft 13 when the first rotary shaft 13 rotates in the closing direction of the rotary lid 3. For example, the one shown in the sectional view of FIG. 3 can be used.

The one-way clutch 14 has a needle roller 141 in contact with the peripheral surface of the first rotary shaft 13 and a groove portion 142 formed so that the groove bottom surface is slightly inclined to one side and holding the needle roller 141. The roller receiving outer ring 143 includes a roller receiving outer ring 143 and a spring 144 supported by the roller receiving outer ring 143 and biasing the needle roller 141 in a direction in which the groove portion 142 narrows. Therefore, when the first rotary shaft 13 rotates in the X direction in FIG.
(When the rotary lid 3 is opened), the first rotary shaft 13 is made to idle without being locked, and conversely, when the first rotary shaft 13 is rotated in the Y direction (when the rotary lid 3 is closed), the groove portion 142 is narrowed by the spring 144. The needle roller 141 urged in the direction
The hollow rotary shaft 12 is rotated together with the first rotary shaft 13 by being locked to the rotary shaft 13.

In such a rotary damper 1, as shown in FIG. 1, an outer cylindrical body 10 is fixed to a main body portion 4 by fixing a flange 10a with a bolt (not shown), and a first rotary shaft 13 is provided with a rotary lid. The tip end portion 13a is fitted to the one side end portion 31 of the third cover 3, and is fixedly arranged on the rotary lid 3.

As shown in FIG. 1, the bidirectional locking clutch 2 has a second rotation at the side of the rotary lid 3 opposite to the position where the rotary damper 1 is arranged, that is, at the other side end 32 of the rotary lid 3. The casing 20 is fixed to the main body 4 while the front end portion 23a of the shaft 23 is fitted therein. When the casing 20 is rotatable in the opening direction, rotation in the closing direction is blocked, and the casing 20 is fixed in the closing direction. Any structure may be used as long as it can be rotated in the closing direction by applying the above rotation torque, but the bidirectional locking clutch 2 used in this embodiment is shown in FIGS. It has the structure shown in FIG.

The casing 20 is composed of an outer casing 21 and an inner casing 22.
4, a flange 21b for fixing to the main body portion 4 is projectingly provided on the bottom portion 21 thereof, as with the outer cylinder body 10 of the rotary damper 1 described above. A bearing groove 21c for supporting a second rotating shaft 23 described later is formed on the inner surface of the bottom portion 21a, and an outer lid member 21e is fixed to the opening portion 21d. The inner casing 22 is fixed and loaded in the outer casing 21, has a bottom portion 22b in which a shaft insertion hole 22a is formed, and has a substantially tubular shape attached to the opening portion 22c after housing a roller holder 24 and the like described later. The inner lid member 22d is fixed.

The second rotary shaft 23 is inserted into the hollow holes of the outer lid member 21e and the inner lid member 22d, and the shaft insertion hole 22a of the inner casing 22, and is rotatable in the bearing groove 21c of the outer casing 21. The front end portion 23a, which is supported and disposed on the rotary lid 3, is fitted and fixed to the other side end portion 32 of the rotary lid 3 as described above.

The roller holder 24 is made of a rigid body and
In this embodiment, a roller holding groove 24a having a substantially U-shape is formed in a substantially annular shape having a predetermined thickness, and in three places at 120-degree intervals at appropriate positions in the inner peripheral portion, as shown in FIG. Has been formed. Further, a spring holding groove 24b is formed at a portion of the outer peripheral portion corresponding to this. The roller holder 24 is arranged between the inner casing 22 and the second rotating shaft 23 so as to be sandwiched by a plurality of fixed plates 27 described later (see FIG. 4).

The roller members 25 are formed of a rod-shaped member having a length that can be accommodated in the inner casing 22. In this embodiment, three roller members 25 are inserted into the roller holding grooves 24a of the roller holder 24, respectively. Is provided (see FIG. 5).

The spring member 26 may be any member as long as it can bias the roller member 25 in a predetermined direction by restricting the rotation range of the roller holder 24. As in this embodiment, for example, a piano is used. A material having elasticity such as a wire can be used. It may be a coil spring or the like. And, this spring member 26,
Three rollers are inserted and held in the spring holding grooves 24b of the roller holder 23, respectively, substantially in parallel with the roller member 25 (see FIG. 5). Both ends of each spring member 26 are fitted and fixed to the inner casing 22. The position of the spring member 26 is not particularly limited as long as it can fulfill the above-mentioned function. Therefore, it is not always necessary to provide the spring holding groove 24b formed in the roller holder 24 at the outer peripheral portion corresponding to the roller holding groove 24a.

The fixed plate 27 is the roller holder 24.
Is formed in a substantially annular shape similar to the above, and is provided between the inner casing 22 and the second rotating shaft 23 adjacent to the roller holder 24, that is, on both sides of the roller holder 24 so as to sandwich the roller holder 24. One sheet is provided (see FIG. 4).
As shown in FIG. 7, the fixing plate 27 has a protrusion 27a on the outer peripheral portion, and the protrusion 27a fits into a recess formed in an appropriate position on the inner wall of the inner casing 22 and is fixed in the rotational direction. Is arranged.

Further, in this embodiment, the roller member 25 is inserted into a proper position on the inner peripheral portion of the fixing plate 27 at three positions corresponding to the roller holding groove 24a of the roller holder 24, and its movement is restricted. Roller insertion groove 27 for
b is formed. This roller insertion groove 27b is shown in FIG.
As shown in FIG. 3, the groove bottom is formed so that the central portion 27c of the groove bottom surface can slightly form a wedge angle P toward the second rotating shaft 23 side, that is, the groove bottom surface is tapered. ..

As a result, in the roller insertion groove 27b, the distance between the central portion 27c of the groove bottom surface and the peripheral surface of the second rotary shaft 23 becomes the shortest, and the groove bottom surfaces 27d, 27 on both sides thereof are formed.
e is gradually moved away from the peripheral surface of the second rotary shaft 23. The roller insertion groove 27b is formed in the central portion 27c.
The distance between the second rotary shaft 23 and the peripheral surface of the second rotary shaft 23 is slightly shorter than the diameter of the roller member 25.
The distance between 7e and the peripheral surface of the second rotary shaft 23 is the roller member 25.
It is formed to be slightly longer than the diameter of. Therefore, the roller insertion groove 27b forms the shallowest groove portion 27f at the substantially central portion thereof, and the shallowest groove portion 27f is formed on both sides thereof.
Evacuation groove portions 27g and 27h that are deeper than f are formed.

Further, the fixed plate 27 is formed with a substantially arcuate cutout portion 27j from the outer peripheral portion so as to correspond to the roller insertion groove 27b. As a result, the wall portion forming the roller insertion groove 27b becomes thinner than the other wall portions, and above all, the wall portion 27i forming the central portion 27c of the groove bottom becomes the thinnest and the wall portion 27i. The elastic force of is higher than that of other parts. Here, 28 is a fixing plate 27 on the outer peripheral portion of the roller holder 24,
It is a ring-shaped spacer arranged between 27.

Next, the operation of the opening / closing mechanism such as the rotary lid according to this embodiment will be described. First, the rotary damper 1 and the bidirectional locking clutch 2 are provided at both end portions 31 and 32 of the rotary base portion of the rotary lid 3 which rotates in the vertical direction of a laptop personal computer or the like.
Fix it in the vicinity as shown in FIG.

When the rotary lid 3 is opened, since the first rotary shaft 13 rotates in the X direction in FIG. 3, the needle roller 141 of the one-way clutch 14 causes the spring 14 to move.
Since it is pressed against the elastic force of 4, the rotary damper 1
Does not lock to the first rotary shaft 13 and the first rotary shaft 1
3 rotates freely.

On the other hand, in the bidirectional locking clutch 2, as shown in FIGS. 5 and 7, the roller member 25 has the fixed plate 27.
One of the retreat groove portions 27 in the roller insertion groove 27b of
It is located at g. However, since both ends of the spring member 26 are fixed to the inner casing 22, in this state, a substantially central portion thereof is bent toward the retracting groove portion 27g. Therefore, since the roller holder 24 is biased in the Y direction in the figure by the restoring force of the spring member 26, the fixing plate 2 is attached to the roller member 25.
Therefore, a constant biasing force is always applied in the direction of the shallowest groove 27f of the roller insertion groove 27b formed in FIG. As a result, when the rotary lid 3 is opened, the second rotary shaft 23 is free to rotate in the X direction, as shown in FIGS. 5 and 7, because the roller member 25 is located in the retraction groove portion 27g. To do.

On the other hand, when the rotation of the rotary lid 3 is stopped, due to the weight of the rotary lid 3, the bidirectional locking clutch 2 is
A predetermined rotation torque is applied to the second rotation shaft 23 in the Y direction. As a result, the roller member 25 moves to the second rotary shaft 23.
Along with the rotation of, it rolls in the Y direction. When the roller member 25 reaches the vicinity of the shallowest groove portion 27f from the retracting groove portion 27g of the roller insertion groove 27b of the fixed plate 27, the roller member 25 cannot pass through the shallowest groove portion 27f and is locked. As a result, the rotation of the second rotary shaft 23 in the Y direction is blocked, and the rotary lid 3 stops at an arbitrary position.

When a rotational torque of a predetermined amount or more is applied to the rotary lid 3 in the closing direction, that is, the second rotary shaft 23 is forcibly rotated in the Y direction, the roller member 25 is moved to the central portion of the groove bottom surface. Since the wall portion 27i forming the wall portion 27c is thinnest and has an elastic force higher than that of the other portions, the shallowest groove portion 27f is elastically widened and rollingly moved to the other retracting groove portion 27h. As a result, the roller holder 24 also slightly rotates in the Y direction, and the spring member 26 is bent in the direction opposite to the above. Therefore, the roller member 25 becomes
When located at 7h, rotation in the Y direction is free.

When the rotary lid 3 starts to rotate in the Y direction, in the rotary damper 1, the needle roller 141 of the one-way clutch 14 is urged by the spring 144 to cause the groove portion 1 to move.
The one-way clutch 14 engages with the first rotating shaft 13 because the one-way clutch 14 slightly moves in the direction in which 42 narrows. Therefore, the first rotary shaft 13 rotates together with the hollow rotary shaft 12 inside the outer cylindrical body 10. As a result, viscous resistance of the viscous liquid 11 filled between the hollow rotary shaft 12 and the outer cylindrical body 10 acts, so that the first rotary shaft 13 and the hollow rotary shaft 12 slowly rotate, and Accompanying rotary lid 3
Also closes slowly.

In this case, in the bidirectional locking clutch 2, the roller member 25 is moved by the spring member 26 and the roller holder 24 so that the shallowest groove portion 27 of the fixed plate 27.
Since it is biased in the f direction (X direction at this position), even if a rotational force is applied in the opposite direction, the roller member 25
Is locked near the shallowest groove 27f. Therefore, when the opening operation is performed again after the rotation lid 3 is closed, a rotation torque of a predetermined value or more is applied to the second rotation shaft 23 to forcefully rotate the rotation shaft 23 in the X direction, and the roller member 25 is moved again. It does not rotate in the opening direction unless it is moved to the retreat groove portion 27g. Therefore, even if an inadvertent external force such as wind or vibration is applied in the opening direction after closing, the rotary lid 3 is not easily opened.

In the above-described embodiment, the thin fixed plate 2 punched out by press-pressing in consideration of manufacturing cost and the like.
Although a mode in which a plurality of 7 are arranged has been described, an integrally molded product may be used.

[0033]

The opening and closing mechanism for the rotary lid and the like of the present invention has a structure in which the rotary damper and the bidirectional locking clutch are arranged, and the rotary lid and the like are supported by the rotary shafts of both, so that it can be freely opened. It can be rotated and can be stopped at any position in the middle of the opening operation. Moreover, the closing operation can be slowed by the buffering force of the rotary damper at the time of closing, and the rotary lid or the like is not damaged by the collision or impact at the final stage of the closing rotation. Further, even after the closing, the locking force of the bidirectional locking clutch does not easily open it by an unexpected external force such as wind.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an opening / closing mechanism such as a rotary lid according to the present invention.

FIG. 2 is a sectional view showing a rotary damper used in the embodiment.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view showing a bidirectional locking clutch used in the same embodiment.

FIG. 5 is a roller holder, a fixed plate, a second rotating shaft,
It is sectional drawing which shows the arrangement relationship of a roller member and a spring member.

FIG. 6 is a plan view showing a roller holder of the bidirectional locking clutch used in the embodiment.

FIG. 7 is a plan view showing a fixed plate of the bidirectional locking clutch used in the embodiment.

[Explanation of symbols]

 1 Rotary Damper 10 Outer Cylindrical Body 11 Viscous Liquid 12 Hollow Rotating Shaft 13 First Rotating Shaft 14 One-Way Clutch 2 Bidirectional Locking Clutch 20 Casing 21 Outer Casing 22 Inner Casing 23 Second Rotating Shaft 24 Roller Holder 25 Roller Member 26 Spring Member 27 Fixed plate 3 Rotating lid 4 Main body

Claims (2)

[Claims] 1. An opening / closing mechanism, such as a rotating lid, which is installed so as to be opened and closed vertically within a range of a predetermined rotation angle with respect to a non-moving part via rotating shafts disposed near both end portions. A hollow rotating shaft rotatably loaded into the outer cylindrical body through a viscous liquid; and a hollow rotating shaft disposed in a hollow portion of the hollow rotating shaft so that a part of the hollow rotating shaft is projected to the outside of the outer cylindrical body. A first rotation shaft, and a one-way clutch interposed between the hollow rotation shaft and the first rotation shaft, wherein the protrusion of the first rotation shaft is the immovable portion. A rotary damper, which is fixed to either one of the rotary lid or the like and the outer cylindrical body is fixed to the other of the immovable portion and the rotary lid or the like, and is disposed near one side end of the rotary lid or the like. , The casing and rotation in one direction are prevented from rotating in the other direction, and It is possible to rotate in the other direction by applying a rotation torque of a certain level or more, and at the same time, project a part from the casing so that rotation in one direction can be blocked unless a rotation torque of a predetermined level or more is applied. Has a second rotating shaft disposed in such a manner that the protruding portion of the second rotating shaft is provided on either one of the immovable portion and the rotary lid, and the casing is provided on the stationary portion and the rotary lid. An opening / closing mechanism for a rotary lid or the like, comprising: a bidirectional locking clutch fixed to the other one and disposed near the other side end of the rotary lid or the like. 2. The bidirectional locking clutch has a substantially annular roller holder having a roller holding groove formed in a notch at a proper position on the inner peripheral portion, and a substantially elliptical shape having a width wider than the roller retaining groove at a proper position on the inner peripheral portion. A substantially annular fixing plate fixedly arranged in the casing adjacent to the roller holder, and having a roller insertion groove formed so that the groove bottom surface substantially centrally protrudes inward slightly. The roller member inserted through the roller holding groove of the roller holder and the roller insertion groove of the fixed plate, and the spring holding groove formed at an appropriate position of the roller holder are loaded to rotate the roller holder. The spring member for restricting the range, the roller holder and the fixing plate are inserted into the central hole of the fixing plate so as to be rotatable relative to the casing, and part of the spring member is projected to the outside of the casing. The opening / closing mechanism for the rotary lid or the like according to claim 1, further comprising a second rotary shaft.