JP2003184908A - Rotation driving equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new rotation driving equipment that can be offered for various applications. <P>SOLUTION: A helical spring 8 winds to outer circumferences of a boss 7 and a clutch pipe 3, its one end 9 is locked to the boss 7 and the other end 10 is made to be free and upraised by bending. A control cam 20 is provided with an axial direction of a rotation shaft 1 so as to be displaceable in an outside case 17, and a standing other end 10 of the above helical spring 8 is locked to the control cam 20 and each locking part is provided with in positive rotation, reverse rotation of rotation shaft 1, and also lock condition that is impossible to rotate. It enables the rotation shaft 1 to rotate in a positive direction by loosening the helical spring 8 at the engaging position of the standing other end 10 of helical spring 8 with positive rotation locking section 26 of this control cam 20, and it enables the rotation shaft 1 to rotate in a reverse direction by loosening the helical spring 8 at the engaging position of the standing other end 10 of helical spring 8 with reverse rotation locking section 24 of the control cam 20. Furthermore, helical spring 8 is tightened at the engaging position of un-rotational locking section 25 of the control cam 20 with the standing other end 10 of the helical spring 8, and it makes the rotation shaft 1 in un-rotational lock condition. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a rotary drive device for a winding shaft of a hanging curtain that opens and closes in the vertical direction, a hinge shaft of a door, a hinge shaft of an upper opening window, or an opening / closing lid for electronic devices such as personal computers. The present invention relates to a rotary drive device such as a hinge shaft.

[0002]

2. Description of the Related Art A rotary drive device used for a winding drive shaft of a hanging curtain is freely rotatable when the curtain is pulled down, and further, the rotation is stopped at an arbitrary position to wind the curtain. A rotational force in the winding direction is applied to the winding drive shaft, and the winding is automatically taken up when the stop is released. On the other hand, even in the rotary drive device used for the rotating shaft of the hinge of the opening / closing lid of an electronic device such as a personal computer, the opening / closing lid can be stopped at any position. The rotary drive device that can be stopped at any of these positions incorporates a device having a different structure for each application.

On the other hand, there is known a spring clutch which can stop a rotary drive device at an arbitrary position and can be rotated when the stop is released. In this spring clutch, a large diameter portion and a small diameter portion are provided in a clutch pipe axially mounted in an outer case so as to integrally rotate a rotating shaft, and a boss having the same diameter as the large diameter portion is provided in the small diameter portion. Is rotatably mounted, and this boss can be rotated within the outer case within a slight angle range.A winding spring is wound around the boss and the outer circumference of the clutch pipe, and one end of the boss is locked to the boss. , The other end is free, and the other end is moved and fixed in the tightening direction of the winding spring to lock it so that the rotary shaft does not rotate, and the other end of the winding spring is displaced in the loosening direction of the winding spring. The rotating shaft is rotatable.

[0004]

As described above, the rotary drive device which can be stopped at any position used for various purposes has a different structure for each purpose. Therefore, it is necessary to produce a separate rotary drive device for each application, and the one that produces only a small amount has a problem of high cost. On the other hand, if the above-mentioned spring clutch is used, a rotary drive device having a structure that can be used in various applications, that is, not only for hanging curtains and opening / closing lids of electronic devices but also for opening / closing doors and hinge portions of opening / closing windows, is provided. I realized that I could offer it. In view of this point, the present invention is
It is an object of the present invention to provide a novel rotary drive device that can be commonly provided for various uses.

[0005]

To this end, according to the rotary drive device of the present invention, a large diameter portion and a small diameter portion are provided in a clutch pipe axially mounted in an outer case so as to integrally rotate a rotary shaft,
A boss having the same diameter as the diameter of the large diameter portion is rotatably mounted on the small diameter portion so that the boss can be rotated within a slight angular range in the outer case. A winding spring is wound around the outer periphery of the, the one end is locked to the boss, and the other end is free to fold and stand up.On the other hand, a control cam is provided inside the outer case so as to be displaceable in the axial direction of the rotating shaft. Locking portions for locking the rotation shaft to the forward rotation, reverse rotation, and non-rotatable lock state by locking with the rising end of the winding spring are provided. At the engagement position with, the winding spring is loosened to allow the rotation shaft to rotate forward. Similarly, at the engagement position between the reverse rotation locking part of the control cam and the other end of the winding spring, the winding spring is loosened to reverse the rotation shaft. It is rotatable, and the control cam's non-rotatable lock locking part and winding spring are raised. Tighten the coil spring in position of engagement with, are to be the rotation shaft nonrotatably locked state.

Further, the control cam is formed by a substantially parallelogram-shaped recess, one corner of the recess is a reverse rotation locking portion, and the opposite corner is a non-rotatable lock locking portion. A hook-shaped protrusion is provided at the center of the shape-shaped recess,
This hook-shaped protrusion is used as a normal rotation locking portion.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The details of the device of the present invention will be described below with reference to an embodiment shown in the drawings. The drawing shows an embodiment used in a winding drive shaft rotation drive device for a hanging curtain. In the figure, reference numeral 1 is a rotary shaft that serves as a winding drive shaft of the hanging curtain, and the rotating force of the hanging curtain in the winding direction is biased by the well-known torsion spring (not shown). Rotating shaft 1 serving as the winding drive shaft shown in the embodiment
Is composed of a rod having a hexagonal cross section, and is fitted into a central hexagonal hole of a clutch pipe of a spring clutch described later so as to rotate integrally with the clutch pipe. The rotating shaft 1 may be another square rod or a round rod as long as it can rotate integrally with the clutch pipe.

In the drawing, reference numeral 2 is a spring clutch, and a rotary shaft 1 is fitted in a center fitting hole 4 of a clutch pipe 3 thereof. Therefore, in the illustrated embodiment, the center fitting hole 4 of the clutch pipe 3 is a hexagonal hole. This clutch pipe 3
Has a large-diameter portion 5 around which the winding spring is wound and a small-diameter portion 6 having a smaller diameter than the large-diameter portion 5, and a boss 7 having a diameter similar to the diameter of the large-diameter portion 5 is rotatably mounted on the small-diameter portion 6. I am doing it.

In the figure, reference numeral 8 is a winding spring, one end 9 of which is locked to the boss 7 and the other end 10 of which is free to be bent and raised. The portion wound around the winding spring 7 and the portion wound around the clutch pipe 3 are tightly wound, and the portion corresponding to the boundary portion between the boss 7 and the clutch pipe 3 is sparse. It is arranged so as not to cut into the boundary portion of the pipe 3. The locking structure of the one end 9 of the winding spring 8 to the boss 7 is such that the step large diameter portion 11 is provided on the boss 7 and the locking hole 12 is formed in a part thereof.
One end 9 is locked in this locking hole 12. On the other hand, a stepped large diameter portion 13 is provided at the end of the clutch pipe 3, and the other end of the winding spring 8 is brought into contact with the stepped portion of the stepped large diameter portion 13. A control ring 14 is fitted to one end of the boss 7 so as to rotate integrally with the boss 7, and a control projection 15 is provided on the control ring 14 in a protruding manner.

In the spring clutch 2 having the above-mentioned structure, the clutch pipe 3 and the rotary shaft 1 are rotatably mounted in the outer case 17 via the collars 16 fitted at both ends. The outer case 17 includes the clutch pipe 3
The control projection 15 is received in the case 17A on the side and the case 17B on the boss 7 side.
A movement permitting portion 18 for restricting the movement range of No. 5 is provided.
The movement permitting portion 18 is formed by providing stoppers 19 and 19 for stopping the movement of the control projection 15 on the case 17B, and the range thereof is an angular position of about 90 degrees about the rotation center of the rotation shaft 1. It is in.

On the other hand, the winding spring 8 is provided in the case 17A.
A control cam 20 is provided so as to be displaceable in the axial direction of the rotating shaft 1 in cooperation with the other end 10 of the shaft. Therefore, case 17
Provide horizontal guides 21 and 21 inside the front and rear walls in A,
The control cam 20 is placed on the guides 21 and 21 for guiding. The control cam 20 is constituted by a substantially parallelogram-shaped recess 22 which receives the standing other end 10 of the winding spring 8, and the winding spring 8 has a wall on the direction of the winding spring 8.
Has a through hole 23 formed at the other end 10 of the upright side, and when the entire apparatus is assembled and disassembled, the control cam 20 is first attached to the case 1.
7A, and when the spring clutch 2 is subsequently assembled, the standing other end 10 of the winding spring 8 is received through the passage through hole 23 into the generally parallelogram-shaped recess 22 of the control cam 20. is there.

Then, the substantially parallelogram-shaped recess 22 is formed.
Further, each locking portion is provided to lock the other end 10 of the winding spring 8 so as to lock the rotation shaft 1 in the forward and reverse rotations and the non-rotatable lock state. That is, the reverse rotation locking portion 24 is positioned at one corner of the substantially parallelogram-shaped concave portion 22 that loosens the winding spring 8 most and reversely rotates the rotating shaft 1 in the curtain winding direction of the torsion spring (not shown). Rotation locking part 24
A non-rotatable lock engaging portion that locks the rotary shaft 1 by tightening the winding spring 8 at the corner opposite to
Further, a hook-shaped protrusion 27 is provided at the center of the substantially parallelogram-shaped recess 22, and the hook-shaped protrusion 27 serves as a normal rotation locking portion 26.

As described above, the spring clutch 2 is housed in the outer case 17, and the outer case 17 is a combination of the case 17A and the case 17B, which are integrated by four screws 28 shown in FIGS. 5 and 10. It is fixed. When the rotary drive device of the present invention is incorporated, the cases 17A and 17B are separated from each other, and the control cam 20 is housed in the case 17A on the guides 21 and 21 slidably along the guides. Next, the collars 16, 16 are fitted to both ends of the spring clutch 2 fitted with the rotary shaft 1, and the clutch pipe 3 is fitted in the receiving hole 29 on the side of the case 17A.
The collar 16 on the side is fitted, and at this time, the other end 1
0 from the through hole 23 of the control cam 20 into the generally parallelogram-shaped recess 22 of the control cam 20, and then the collar 16 on the boss 7 side is fitted into the receiving hole 30 of the case 17B by the four screws 28. The cases 17A and 17B may be integrated together.

In the rotary drive device of the present invention assembled in this way, when the winding spring 8 is tightened in the winding direction, the control projection 15 of the control ring 14 fitted to the boss 7 is moved to the stopper 19 on the right side of FIG. , The rotation of the boss 7 is stopped, the clutch pipe 3 is tightened by the winding spring 8 and becomes unrotatable, and the rotating shaft 1 cannot be rotated. At this time, the standing other end 10 of the winding spring 8 is in a position where it engages with the non-rotatable lock engaging portion 25 of the control cam 20 as shown in FIGS. 8 and 9.

When a slight force in the unwinding direction is applied to the rotary shaft 1 from the above-mentioned state, the force in the unwinding direction of the torsion spring is applied to the rotary shaft 1, so that the wrapping spring 8 is loosened. A force is applied, and the standing other end 10 of the force is applied to the control cam 2
0 from the non-rotatable lock engaging portion 25 to the normal rotation engaging portion 26, and the standing other end 10 engages with the normal rotation engaging portion 26,
The tightening force of the spring 8 will be loosened. This state is as shown in FIGS. 1, 2, 4, and 5, and the rotary shaft 1 can be freely rotated in the forward rotation direction, that is, in the direction in which the hanging curtain is lowered. Therefore, when the rotation of the rotating shaft 1 in the forward direction, which is the direction of pulling down the hanging curtain, is stopped, the resistance due to the slight looseness of the winding spring 8 and the reverse rotational force of the torsion spring for unwinding balance, and the hanging The curtain remains stationary.

Next, when a slight force in the rewinding direction is applied to the rotating shaft 1 that has stopped, the standing other end 10 of the winding spring 8 moves from the forward rotation locking portion 26 to the reverse rotation locking portion 24. And the winding spring 8 is sufficiently loosened (see FIGS. 6 and 7). Therefore, the hanging curtain is
In the unwinding direction, the torsion spring reversely rotates and the hanging curtain is rolled up. Then, at the fully wound position, the standing other end 10 is moved from the reverse rotation locking portion 24 to the non-rotatable lock locking portion 25 position by the winding force of the winding spring 8 and is engaged therewith.

In the above description of the embodiment, the rotary drive device of the present invention is used for the winding shaft of the hanging curtain. However, the hinge shaft of the upper opening window which gives the turning force in the opening direction, the opening and closing of the opening and closing window. It can also be used for the hinge axis of doors or the hinge axis of lids for electronic devices such as personal computers.

[0018]

According to the rotary drive device of the present invention, a large diameter portion and a small diameter portion are provided in a clutch pipe axially mounted in an outer case so as to integrally rotate a rotary shaft. A boss of the same diameter as the boss is rotatably mounted, and the boss is made rotatable in the outer case within a slight angle range, and a wrap spring is wound around the boss and the outer circumference of the clutch pipe. While one end is locked to the boss and the other end is free to bend and stand up, a control cam is provided inside the outer case so as to be displaceable in the axial direction of the rotating shaft, and the control cam is engaged with the other end of the coil spring upright. Each locking part is provided to stop and lock the rotation shaft in the normal rotation, reverse rotation and non-rotatable lock state. Loosen it so that the rotating shaft can rotate forward, and also rotate with the reverse rotation locking part of the control cam. Loosen the winding spring at the position where it engages with the other end of the spring to allow the rotation shaft to rotate in the reverse direction. Since the rotation shaft is tightened and the rotation shaft is locked so as not to rotate, the rotation shaft can be freely rotated in the forward and reverse directions and stopped at any position. Therefore, the rotary drive device can be manufactured with a common structure, that is, with common parts, and can be commonly used for various purposes, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional front view of a rotary drive device of the present invention, showing a position of a rotary shaft in a forward rotation state.

FIG. 2 is a partial cross-sectional plan view of an essential part showing the positional relationship between the standing other end of the winding spring and the control cam in the state position of FIG.

FIG. 3 is a bottom view of a control cam.

FIG. 4 is a sectional side view taken along the line AA in FIG.

5 is a sectional side view taken along the line BB in FIG.

FIG. 6 is a cross-sectional front view of the main part of the rotary drive device of the present invention at the control cam position, showing the reverse rotation state position of the rotary shaft.

FIG. 7 is a partial cross-sectional plan view of a main part showing the positional relationship between the standing other end of the winding spring and the control cam in the state position of FIG. 6;

FIG. 8 is a cross-sectional front view of the main part of the rotary drive device of the present invention at the control cam position, showing the non-rotatable locked position of the rotary shaft.

FIG. 9 is a partial cross-sectional plan view of a main portion showing the positional relationship between the other end of the coil spring and the control cam in the state position shown in FIG. 8;

FIG. 10 is an exploded perspective view of the rotary drive device of the present invention.

[Explanation of symbols]

1 rotation axis 2 spring clutch 3 clutch pipe 4 Center fitting hole 5 Large diameter part 6 Small diameter part 7 Boss 8 winding spring 9 one end 10 Standing other end 11 step large diameter part 12 Locking part 13 Large stepped portion 14 Control ring 15 Control protrusion 16 colors 17 outer case 18 Movement Allowance Section 19 stopper 20 control cam 21 Guide 22 Approximately parallelogram-shaped recess 23 through hole 24 Reverse rotation locking part 25 Non-rotatable lock locking part 26 Forward rotation locking part 27 Hook type locking part 28 screws 29 receiving hole 30 receiving hole

Claims (2)

[Claims] 1. A large diameter portion and a small diameter portion are provided in a clutch pipe axially mounted in an outer case so as to integrally rotate a rotating shaft, and the small diameter portion has a boss having the same diameter as the diameter of the large diameter portion. Is rotatably mounted, and this boss can be rotated within the outer case within a slight angle range.A winding spring is wound around the boss and the outer circumference of the clutch pipe, and one end of the boss is locked to the boss. , While the other end is free to bend and stand up, a control cam is provided in the outer case so as to be displaceable in the axial direction of the rotating shaft.
The control cam is provided with each locking portion that locks with the standing other end of the winding spring to lock the rotation shaft in the forward and reverse rotations and the non-rotatable lock state. Loosen the winding spring at the engagement position with the other end of the winding to enable the rotation shaft to rotate forward, and loosen the winding spring at the engagement position between the reverse rotation locking part of the control cam and the other end of the winding spring. Rotating the rotation shaft in the reverse rotation direction, and tightening the winding spring at the engagement position between the non-rotation lock locking part of the control cam and the standing other end of the winding spring to bring the rotation shaft into the non-rotation lock state. Drive. 2. The control cam comprises a substantially parallelogram-shaped recess, and one corner of the recess serves as a reverse rotation locking portion,
3. The non-rotatable lock engaging portion on the opposite side, the hook-shaped protruding portion is provided at the central position of the substantially parallelogram-shaped recess, and the hook-shaped protruding portion serves as the normal rotation engaging portion. The rotary drive described.