JP2977655B2 - Opening / closing mechanism such as rotating lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention can prevent rotation in the reverse direction at any position of opening or closing operation of a rotating lid or the like, and can apply the rotating torque of a predetermined value or more to the position. The present invention relates to an opening / closing mechanism for a rotating lid or the like that can rotate in the opposite direction from the rotating lid and absorb a drop impact due to free rotation of the rotating lid or the like.

[0002]

2. Description of the Related Art Laptops, pianos, western-style toilets, office furniture, and other rotating lids and doors used for laptops, which open upward from the bottom around a rotation axis, are 90 to 90.
Conventionally, a cam-type locking device is 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 to a predetermined angle, it is locked and stopped by a cam, and then, when the rotary lid is to be closed, the rotary lid is slightly lifted upward. To release the lock of the cam, whereby the rotary lid performs a closing operation downward.

[0004]

However, since the locking device of the cam type is configured to lock only when the rotary lid or the like is opened to a predetermined position set in advance, the locking device is locked at an arbitrary position. There is a problem that you can not.

[0005] In addition, since the above-mentioned rotary lid and the like become free-falling rotating objects when closed, unless they are closed with hands or the like until the end of the closing operation, an immovable part (base) is required at the final point of the closing rotation. And produces a loud impact noise, and also causes damage.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can rotate a lid or the like at any position while freely supporting a rotary lid or the like. Provided is an opening / closing mechanism such as a rotating lid capable of easily releasing the locking and freeing rotation in the reverse direction by applying a rotating torque equal to or more than a predetermined value and capable of reducing an 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 is provided with a predetermined rotation with respect to an immovable portion via rotary shafts disposed near both side ends. In an opening and closing mechanism such as a rotating lid that is mounted to be opened and closed within a range of an angle, a hollow rotating shaft rotatably mounted on an outer cylindrical body through a viscous liquid, and a part of the outer rotating body. A first rotary shaft provided in the hollow portion of the hollow rotary shaft so as to protrude outward from the cylindrical body; and a one-way provided between the hollow rotary shaft and the first rotary shaft. And a protrusion of the first rotating shaft is provided on one of the stationary part and the rotating lid, and the outer cylinder is provided on one of the stationary part and the rotating lid. The rotary damper, which is fixed and disposed near one end of the rotating lid or the like, and the casing, rotate in one direction. In the active state, the rotation in the other direction is prevented, and the rotation in the other direction is enabled by applying the rotation torque in the other direction to the other direction, and at the same time, the rotation torque in the other direction is applied. A second rotation shaft disposed so as to partially protrude from the casing so that rotation in one direction can be prevented unless the protrusion of the second rotation shaft rotates with the immovable portion. A two-way locking clutch in which the casing is fixed to one of the stationary part and the other of the rotating lid and the like, and is disposed near the other side end of the rotating lid or the like; It is characterized by having.

[0008]

In such a configuration, when the rotary lid or the like is rotating in the opening direction with respect to the stationary part (base), the second rotating shaft rotates freely in the bidirectional locking clutch. When a rotation torque is applied in the reverse direction, that is, in the closing direction, the rotation of the second rotation shaft is prevented.

On the other hand, when a rotation torque of a predetermined value or more 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 hand or the like attached to the rotating lid or the like is released, the rotating lid or the like becomes a free-falling rotating body, but a predetermined braking force acts due to the viscous resistance of the rotary damper, and the rotating lid or the like is slowly closed. Operate.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to an embodiment shown in the drawings. In the figure, reference numeral 1 denotes a rotary damper constituting an opening / closing mechanism such as a rotary lid according to the present embodiment, and 2 denotes a bidirectional locking clutch. In addition,
This embodiment is an embodiment applied to an openable personal computer as shown in FIG. 1, 3 is a rotary lid of the openable personal computer with a built-in display, and 4 is a main body as a fixed part with a CPU and a keyboard built in Indicates a part.

As shown in FIGS. 2 and 3, the rotary damper 1 has a flange 10a at the bottom for fixing to the main body 4.
And a hollow rotary shaft 12 housed and loaded in the outer cylinder 10 via a viscous liquid 11 such as grease.
A first rotating shaft 13 rotatably inserted into a hollow portion of the hollow rotating shaft 12, and an inner peripheral surface 12 a of the hollow rotating shaft 12 so as to be in contact with a peripheral surface of the first rotating shaft 13. Between the one-way clutch 14 and the first rotating shaft 1
3 has an insertion hole 15a through which the first rotary shaft 1 is inserted.
And a cover member 15 that is mounted on the upper portion of the outer cylinder 10 by protruding the distal end portion 13a of the cover 3 outward. In addition,
Reference numerals 16 and 17 denote sealing packings provided between the upper or lower surface of the hollow rotary shaft 12 and the lid member 15 or the bottom surface of the outer cylinder 10, and the viscous liquid 11 is used for the sealing packing 1.
6, 17 are filled outside.

When the first rotary shaft 13 rotates in the opening direction of the rotary lid 3, 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 closing direction of the rotary cover 3, any type may be used as long as it has a function of engaging with the first rotary shaft 13. 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 rotating shaft 13 and a groove 142 formed so that the groove bottom surface is slightly inclined to one side, and holds the needle roller 141. It comprises a roller receiving outer ring 143 and a spring 144 supported by the roller receiving outer ring 143 and for urging the needle roller 141 in a direction in which the groove 142 becomes narrower. Therefore, when the first rotating shaft 13 rotates in the X direction in FIG.
When the first rotary shaft 13 is idled without being locked, on the contrary, when the first rotary shaft 13 is rotated in the Y direction (when the rotary lid 3 is closed), the groove 142 is narrowed by the spring 144. The needle roller 141 urged in the direction
And the hollow rotary shaft 12 is rotated together with the first rotary shaft 13.

In this rotary damper 1, as shown in FIG. 1, an outer cylinder 10 is fixed to a main body 4 by fixing a flange 10a with a bolt (not shown), and a first rotating shaft 13 is rotated by a rotating lid. 3 is fixed to the rotary lid 3 by fitting the tip 13a to one side end 31 thereof.

As shown in FIG. 1, the two-way locking clutch 2 has a second rotation on the side opposite to the position where the rotary damper 1 is disposed on the rotary lid 3, that is, on the other side end 32 of the rotary lid 3. The distal end portion 23a of the shaft 23 is fitted, and the casing 20 is fixed to the main body portion 4. When the casing 20 is rotatable in the opening direction, the rotation in the closing direction is prevented, and the rotation in the closing direction is prevented. Any structure may be used as long as it can rotate in the closing direction by applying the above rotational torque, but the two-way locking clutch 2 used in the present embodiment is shown in FIGS. The structure shown in FIG.

The casing 20 comprises an outer casing 21 and an inner casing 22, and the outer casing 2
As shown in FIG. 4, a flange 21 b for fixing to the main body 4 protrudes from the bottom 21, similarly to the outer cylindrical body 10 of the rotary damper 1, as shown in FIG. 4. A bearing groove 21c for supporting a second rotating shaft 23 described later is formed on the inner surface of the bottom 21a, and an outer lid member 21e is fixed to the opening 21d. The inner casing 22 is fixedly loaded in the outer casing 21 and has a bottom portion 22b having a shaft insertion hole 22a formed therein. The inner lid member 22d is fixed.

The second rotating shaft 23 is inserted through 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. As described above, the distal end 23a protruding outward is fitted and fixed to the other side end 32 of the rotary lid 3 as described above.

The roller holder 24 is made of a rigid body.
In this embodiment, as shown in FIG. 6, approximately U-shaped roller holding grooves 24 a are formed at three places at 120-degree intervals in a substantially annular shape having a predetermined thickness and at an appropriate position on the inner peripheral portion. Is formed. Further, a spring holding groove 24b is formed in a corresponding portion of the outer peripheral portion. The roller holder 24 is disposed between the inner casing 22 and the second rotating shaft 23 so as to be sandwiched by a plurality of fixing plates 27 described later (see FIG. 4).

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

The spring member 26 may be of any type as long as it can urge the roller member 25 in a predetermined direction by regulating the rotation range of the roller holder 24. An elastic material such as a wire can be used. Note that a coil spring or the like may be used. And this spring member 26
The three rollers are inserted and held in the spring holding grooves 24b of the roller holder 23 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 perform the above-described function. Therefore, it is not always necessary to provide the spring holding groove 24b formed in the roller holder 24 at an outer peripheral portion corresponding to the roller holding groove 24a.

The fixing plate 27 is provided on the roller holder 24.
, And between the inner casing 22 and the second rotation shaft 23, adjacent to the roller holder 24, that is, on both sides thereof so as to sandwich the roller holder 24. (See FIG. 4).
As shown in FIG. 7, the fixing plate 27 has a projection 27a on an outer peripheral portion. The projection 27a fits into a concave portion formed at an appropriate position on the inner wall of the inner casing 22, and is fixed in the rotation direction. Is arranged.

Further, in the present embodiment, the roller member 25 is inserted into three places corresponding to the roller holding grooves 24a of the roller holder 24, and the movement of the roller member 25 is restricted. Roller insertion groove 27
b is formed. This roller insertion groove 27b is
As shown in FIG. 5, the center portion 27c of the groove is substantially elliptical and the center 27c of the groove bottom slightly protrudes toward the second rotating shaft 23 to form a wedge angle P, that is, the groove bottom 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 is the shortest, and the groove bottom surfaces 27d, 27 on both sides thereof are provided.
e gradually moves away from the peripheral surface of the second rotation shaft 23. Note that the roller insertion groove 27b is
So that the distance between the roller member 25 and the peripheral surface of the second rotating shaft 23 is slightly shorter than the diameter of the roller member 25, and the groove bottom surfaces 27d, 2
7e and the peripheral surface of the second rotating shaft 23
It is formed to be slightly longer than the diameter of. Therefore, the roller insertion groove 27b forms a shallow groove 27f at substantially the center thereof, and the shallow groove 27f is formed on both sides thereof.
The evacuation grooves 27g and 27h having a depth greater than f are formed.

The fixed plate 27 is formed with a substantially arc-shaped notch 27j from the outer peripheral portion corresponding to the roller insertion groove 27b. As a result, the wall portion forming the roller insertion groove 27b is thinner than the other wall portions, and the wall portion 27i forming the central portion 27c of the groove bottom surface is the thinnest, and the wall portion 27i is particularly thin. Will have an increased elastic force as compared with other portions. Here, reference numeral 28 denotes a fixing plate 27 at the outer peripheral portion of the roller holder 24,
27 is a ring-shaped spacer disposed between the two.

Next, the operation of the opening / closing mechanism such as the rotating lid according to the present embodiment will be described. First, the rotary damper 1 and the two-way locking clutch 2 are connected to both ends 31, 32 of a rotating base of a rotating lid 3 that rotates in the vertical direction of a laptop computer or the like.
It is fixed in the vicinity as shown in FIG.

When the rotary cover 3 is opened, the first rotary shaft 13 rotates in the X direction in FIG. 3, so that the needle roller 141 of the one-way clutch 14
4 against the resilience of the rotary damper 1
Are not locked to the first rotating shaft 13 and the first rotating shaft 1
3 rotates freely.

On the other hand, as shown in FIGS. 5 and 7, the two-way locking clutch 2
Inside the roller insertion groove 27b,
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 evacuation groove 27 g. Therefore, since the roller holder 24 is urged in the Y direction in the drawing by the return force of the spring member 26, the roller member 25
7, a constant urging force is constantly applied in the direction of the shallowest groove 27f of the roller insertion groove 27b. As a result, when the rotating lid 3 is opened, the second rotating shaft 23 rotates freely in the X direction as shown in FIGS. 5 and 7 because the roller member 25 is located in the retracting groove 27g. I do.

On the other hand, when the rotation of the rotary lid 3 is stopped, the two-way locking clutch 2
A predetermined rotation torque is applied to the second rotation shaft 23 in the Y direction. As a result, the roller member 25 is
Rolls in the Y direction with the rotation of. When the roller member 25 reaches the vicinity of the shallow groove 27f from the retreat groove 27g of the roller insertion groove 27b of the fixed plate 27, it cannot pass through the shallow groove 27f and is locked. Thus, the rotation of the second rotating shaft 23 in the Y direction is prevented, and the rotating lid 3 stops at an arbitrary position.

When a rotation torque of a predetermined value or more is applied to the rotating lid 3 in the closing direction, that is, the second rotating shaft 23 is forcibly rotated in the Y direction, the roller member 25 is moved to the center of the groove bottom. Since the wall portion 27i forming the portion 27c is formed to be the thinnest and has a higher elastic force than the other portions, the shallow groove portion 27f is resiliently expanded and rolls 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 bends in the opposite direction. Therefore, the roller member 25 is moved to the evacuation groove 2.
When it is 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, and
The one-way clutch 14 is engaged with the first rotating shaft 13 because the one-way clutch 14 is slightly moved in the direction in which the width 42 becomes narrower. Therefore, the first rotating shaft 13 rotates together with the hollow rotating shaft 12 in the outer cylindrical body 10. As a result, the viscous resistance of the viscous liquid 11 filled between the hollow rotary shaft 12 and the outer cylinder 10 acts, so that the first rotary shaft 13 and the hollow rotary shaft 12 rotate slowly, Revolving lid 3
Also closes slowly.

In this case, in the two-way locking clutch 2, the roller member 25 is fixed to the shallow groove 27 of the fixed plate 27 by the spring member 26 and the roller holder 24.
Since the roller member 25 is urged in the f direction (the X direction in this position), the roller member 25
Locks near the shallow groove 27f. Therefore, when the rotating lid 3 is to be opened again after being closed, a rotating torque of a predetermined value or more is applied to the second rotating shaft 23 to forcibly rotate the second rotating shaft 23 in the X direction, and the roller member 25 is again turned to one side. Does not rotate in the opening direction unless it is moved to the evacuation groove 27g. Therefore, even if careless external force such as wind or vibration is applied in the opening direction after closing, the rotating lid 3 will not be easily opened.

In the above-described embodiment, the thin plate-shaped fixing plate 2 is stamped out in consideration of manufacturing costs and the like.
Although the aspect in which a plurality of the sheets 7 are arranged has been described, an integrally molded article may be used.

[0033]

The opening / closing mechanism of the rotary lid and the like according to the present invention has a structure in which a rotary damper and a bidirectional locking clutch are provided, and the rotary lids and the like are supported on the rotary shafts of both, so that they can be freely opened in the opening direction. It can be rotated, and can be stopped at any position during the opening operation. In addition, the closing operation can be slowed by the damping force of the rotary damper at the time of closing, so that the rotating lid or the like is not damaged by collision or impact at the end of the closing rotation. In addition, even after closing, the locking force of the two-way locking clutch does not cause easy opening due to careless external force such as wind.

[Brief description of the drawings]

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

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

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view showing a two-way locking clutch used in the embodiment.

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

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

FIG. 7 is a plan view showing a fixing plate of the two-way locking clutch used in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary damper 10 Outer cylinder 11 Viscous liquid 12 Hollow rotating shaft 13 First rotating shaft 14 One-way clutch 2 Two-way locking clutch 20 Casing 21 Outer casing 22 Inner casing 23 Second rotating shaft 24 Roller holder 25 Roller member 26 Spring Member 27 Fixing plate 3 Rotating lid 4 Main body

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65D 39/00-55/16

Claims (2)

(57) [Claims] An opening / closing mechanism, such as a rotating lid, attached to a stationary portion so as to be opened and closed up and down within a predetermined rotation angle range via a rotating shaft disposed near both side ends. A hollow rotary shaft rotatably mounted on the outer cylindrical body via a viscous liquid; and a hollow rotary shaft disposed in the hollow portion of the hollow rotary shaft such that a part of the hollow rotary shaft protrudes outside the outer cylindrical body. A first rotating shaft, and a one-way clutch interposed between the hollow rotating shaft and the first rotating shaft, wherein the protruding portion of the first rotating shaft is A rotary damper that is fixed to one of the rotating lid and the like, the outer cylindrical body is fixed to the other of the stationary part and the rotating lid and the like, and is disposed near one side end of the rotating lid and the like; When the casing and the casing can be rotated in one direction, rotation in the other direction is prevented, and By applying a rotation torque greater than a predetermined value, rotation in the other direction becomes possible, and at the same time, a part is projected from the casing so that rotation in one direction can be prevented unless a rotation torque greater than a predetermined value is applied. A second rotating shaft disposed in such a manner that a protruding portion of the second rotating shaft is provided on one of the stationary portion and the rotating lid and the like, and the casing is provided between the stationary portion and the rotating lid and the like. A two-way locking clutch fixed to one of the other and disposed near the other side end of the rotating lid or the like. 2. A two-way locking clutch, comprising: a substantially annular roller holder having a notched roller holding groove at an appropriate position on an inner peripheral portion; and a substantially elliptical shape wider than the roller holding groove at an appropriate position on the inner peripheral portion. A substantially annular fixing plate having a roller insertion groove formed with a cutout so that a substantially center portion of the groove bottom surface slightly protrudes inward, and fixedly disposed on the casing adjacent to the roller holder; A roller member inserted and disposed in the roller holding groove of the roller holder and the roller insertion groove of the fixing plate; and a spring holding groove formed in an appropriate position of the roller holder, and the rotation of the roller holder A spring member that regulates the range, is inserted through a central hole of the roller holder and the fixing plate, is disposed so as to be rotatable relative to the casing, and partially protrudes outside the casing. 2. The opening / closing mechanism for a rotary lid or the like according to claim 1, further comprising a second rotary shaft.