JP4164258B2 - Rotation drive - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a rotary drive device for a winding shaft of a hanging curtain that opens and closes in the vertical direction, or a rotary drive of a hinge shaft of a door, a hinge shaft of an upper opening window, or a hinge shaft of an opening / closing lid of an electronic device such as a personal computer. Relates to the device.
[0002]
[Prior art]
The rotary drive device used for the winding drive shaft of the hanging curtain is rotatable when pulling down the curtain, stops rotating at an arbitrary position, and is used as the wind drive shaft when winding the curtain. A rotational force in the winding direction is applied, and the winding is automatically performed when the stop is released.
On the other hand, even in the rotary drive device used for the pivot shaft of the opening / closing lid hinge part of an electronic device such as a personal computer, the opening / closing lid can be stopped at an arbitrary position.
The rotary drive device that can be stopped at these arbitrary positions incorporates a device having a different structure for each application.
[0003]
On the other hand, there is known a spring clutch that can stop the rotation drive device at an arbitrary position and can rotate when the stop is released.
This spring clutch is provided with a large-diameter portion and a small-diameter portion in a clutch pipe that is mounted in an outer case so as to integrally rotate a rotation shaft, and the small-diameter portion has a boss having the same diameter as that of the large-diameter portion. The boss is pivotable within a small angle range in the outer case, a winding spring is wound around the outer periphery of the boss and the clutch pipe, and one end of the boss is locked to the boss. The other end is free, the other end is moved and fixed in the tightening direction of the winding spring to lock the rotating shaft, and the other end of the winding spring is displaced in the loosening direction of the winding spring. The rotating shaft is made rotatable.
[0004]
[Problems to be solved by the invention]
As described above, the rotary drive device that can be stopped at any position used for various applications has a different structure for each application. Therefore, it is necessary to produce a separate rotary drive device for each application, and a product that produces only a small amount has a problem of high cost.
On the other hand, if the above-described 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 hinges of opening / closing doors and opening / closing windows. I realized I could provide it.
In view of this point, an object of the present invention is to provide a novel rotary drive device that can be provided in common for various applications.
[0005]
[Means for Solving the Problems]
For this purpose, the rotary drive device of the present invention is provided with a large diameter portion and a small diameter portion in a clutch pipe mounted in an outer case so as to rotate the rotation shaft integrally, and the diameter of the large diameter portion is provided in the small diameter portion. A boss with the same diameter is pivotally mounted, this boss is allowed to rotate within a small angle range in the outer case, a winding spring is wound around the outer circumference of this boss and clutch pipe, and one end of the boss is While locked to the boss and bent to stand with the other end free, a control cam is provided in the outer case so as to be displaceable in the axial direction of the rotary shaft, and the control cam is locked to the standing other end of the winding spring. The locking shafts are provided with respective locking portions for forward and reverse rotation of the rotating shaft and a non-rotatable locked state, and the winding spring is loosened at the engagement position between the forward rotation locking portion of the control cam and the rising end of the winding spring. The rotation shaft can be rotated in the forward direction. The winding spring is loosened at the engagement position with the other rising end of the screw so that the rotating shaft can be rotated in the reverse direction, and the winding spring is moved at the engagement position between the non-rotatable lock engaging portion of the control cam and the rising other end of the winding spring. Tightening and the rotation shaft are in a non-rotatable locked state.
[0006]
Further, the control cam is constituted by a substantially parallelogram-shaped concave portion, and one corner portion of the concave portion is set as a reverse rotation locking portion, and the opposite corner portion is set as a non-rotatable lock locking portion. A saddle-shaped projection is provided at the center of the shaft, and this saddle-shaped projection is used as a forward rotation locking portion.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Details of the apparatus 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 driving shaft rotation driving device for a hanging curtain. In the figure, reference numeral 1 denotes a rotating shaft that serves as a winding driving shaft for the hanging curtain, and a rotating force in the winding direction of the hanging curtain is urged on the rotating shaft 1 by a known torsion spring (not shown). The rotary shaft 1 serving as a winding drive shaft shown in the embodiment is constituted by a bar having a hexagonal cross section. The rotary shaft 1 is fitted into a central hexagon hole of a clutch pipe of a spring clutch described later and rotates integrally with the clutch pipe. It is like that. The rotating shaft 1 may be another square bar or a round bar as long as it can rotate integrally with the clutch pipe.
[0008]
In the figure, reference numeral 2 denotes a spring clutch, and the rotary shaft 1 is fitted into the center fitting hole 4 of the clutch pipe 3. Therefore, in the illustrated embodiment, the center fitting hole 4 of the clutch pipe 3 is a hexagonal hole. The clutch pipe 3 has a large-diameter portion 5 around which a 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 the same diameter as the large-diameter portion 5 is rotated around the small-diameter portion 6. The shaft is freely mounted.
[0009]
In the figure, reference numeral 8 denotes a winding spring, one end 9 of which is locked to the boss 7 and the other end 10 is made free to be bent upright. A portion where the winding spring 8 is wound around the boss 7 and a portion where the winding is wound around the clutch pipe 3 are tightly wound, and a portion corresponding to the boundary portion between the boss 7 and the clutch pipe 3 is sparse. 7 and the clutch pipe 3 are not cut into the boundary portion. In the structure for locking the one end 9 of the winding spring 8 to the boss 7, a step large diameter portion 11 is provided in the boss 7, a locking hole 12 is formed in a part thereof, and the one end 9 is engaged with the locking hole 12. It is stopped. On the other hand, a step 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 step portion of the step 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.
[0010]
In the spring clutch 2 having the above-described structure, the clutch pipe 3 and the rotary shaft 1 are rotatably mounted in the outer case 17 via collars 16 and 16 fitted to both ends. The outer case 17 is provided with a movement allowing portion 18 that receives the control protrusion 15 in the case 17A on the clutch pipe 3 side and the case 17B on the boss 7 side and restricts the movement range of the control protrusion 15. The movement allowing portion 18 is formed by providing stoppers 19, 19 for stopping the movement of the control projection 15 on the case 17 B, and the range thereof is an angular position of approximately 90 degrees centering on the rotation center of the rotary shaft 1. It is in.
[0011]
On the other hand, a control cam 20 is provided in the case 17A so as to be displaceable in the axial direction of the rotary shaft 1 in cooperation with the standing other end 10 of the winding spring 8. Therefore, horizontal guides 21 and 21 are provided inside the front and rear walls in the case 17A, and the control cam 20 is placed on the guides 21 and 21 for guidance. The control cam 20 is configured by a substantially parallelogram-shaped concave portion 22 that receives the standing other end 10 of the winding spring 8, and a passage through hole 23 of the standing other end 10 of the winding spring 8 is formed on the wall of the winding spring 8. When assembling and disassembling the entire device, the control cam 20 is first assembled in the case 17A, and then the spring clutch 2 is assembled, and then the standing other end 10 of the winding spring 8 is passed through the passage transparent. It is adapted to be received in the generally parallelogram-shaped recess 22 of the control cam 20 through the hole 23.
[0012]
The substantially parallelogram-shaped concave portion 22 is provided with respective locking portions that are locked to the standing other end 10 of the winding spring 8 so that the rotating shaft 1 is in the forward rotation and reverse rotation and non-rotatable locked states. That is, the reverse rotation locking portion 24 is positioned at one corner portion 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 a torsion spring (not shown). A non-rotatable lock latching portion that makes the rotation shaft 1 non-rotatable by tightening the winding spring 8 at a corner on the opposite side of the rotation latching portion 24 is positioned at a central position of the substantially parallelogram-shaped concave portion 22. A hook-shaped protrusion 27 is provided, and this hook-shaped protrusion 27 is used as the forward rotation locking part 26.
[0013]
As described above, the spring clutch 2 is accommodated in the outer case 17, and this outer case 17 is a combination of the case 17A and the case 17B, and is fixed integrally with the four screws 28 shown in FIGS. is there. When the rotary drive device of the present invention is incorporated, the cases 17A and 17B are separated, and the control cam 20 is slidably accommodated along the guides 21 and 21 in the case 17A. Next, the collars 16 and 16 are fitted to both ends of the spring clutch 2 to which the rotary shaft 1 is fitted, and the collar 16 on the clutch pipe 3 side is fitted in the receiving hole 29 on the case 17A side. Is inserted into the substantially parallelogram-shaped recess 22 of the control cam 20 from the passage through hole 23 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 17 </ b> B and the case is secured by four screws 28. What is necessary is just to integrate 17A and 17B integrally.
[0014]
In the rotary drive device of the present invention thus assembled, when the winding spring 8 is tightened in the winding direction, the control protrusion 15 of the control ring 14 fitted to the boss 7 is engaged with the stopper 19 on the right side of FIG. Then, the rotation of the boss 7 is stopped, and the clutch pipe 3 is tightened by the winding spring 8 to be unable to rotate, 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 to be engaged with the non-rotatable lock engaging portion 25 of the control cam 20 as shown in FIGS.
[0015]
When a slight force in the rewinding direction is applied to the rotating shaft 1 from the above state, a force in the loosening direction is applied to the rotating spring 8 because a force in the unwinding direction of the torsion spring is applied to the rotating shaft 1. The rising other end 10 moves from the non-rotatable lock latching portion 25 of the control cam 20 to the forward rotation latching portion 26, and the standing other end 10 engages with the forward rotation latching portion 26, and the spring 8 The tightening force will be loosened. This state is as shown in FIG. 1, FIG. 2, FIG. 4 and FIG. 5, and the rotary shaft 1 can be freely rotated in the normal rotation direction, that is, the direction in which the hanging curtain is lowered.
Therefore, when the rotation of the rotating shaft 1 that is the pulling-down direction of the hanging curtain is stopped, the resistance due to slight looseness of the winding spring 8 and the reverse rotational force of the torsion spring for unwinding are balanced, and the hanging curtain is suspended. The curtain remains stationary.
[0016]
Next, when a slight force in the rewinding direction is applied to the stopped rotating shaft 1, 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 to be locked. Then, the winding spring 8 is maintained in a sufficiently loosened state (shown in FIGS. 6 and 7). Therefore, the hanging curtain is reversely rotated by the unwinding direction torsion spring of the rotating shaft 1, and the hanging curtain is wound up. Then, 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 at the fully wound position and engaged.
[0017]
In the description of the above embodiment, the example in which the rotary drive device of the present invention is used as the winding shaft of the hanging curtain has been described. However, the hinge shaft of the upper opening window and the hinge of the opening and closing door that provide the turning force in the opening direction. It can also be used as a shaft or hinge shaft for opening / closing lids of electronic devices such as personal computers.
[0018]
【The invention's effect】
The rotary drive device of the present invention is provided with a large-diameter portion and a small-diameter portion in a clutch pipe that is mounted in an outer case so as to rotate the rotation shaft integrally, and the small-diameter portion has the same diameter as the diameter of the large-diameter portion. The boss is pivotably mounted, and this boss is allowed to rotate within a slight angle range within the outer case. A winding spring is wound around the outer periphery of the boss and the clutch pipe, and one end of the boss is engaged with the boss. The control cam is displaceable in the axial direction of the rotary shaft in the outer case, and the other end is free. Are provided with respective locking portions for forward rotation, reverse rotation, and non-rotatable locking, and the winding spring is loosened at the engaging position between the forward rotation locking portion of the control cam and the standing other end of the winding spring to rotate the rotating shaft. Enables normal rotation, as well as the reverse rotation locking part of the control cam and the standing of the spring The winding spring is loosened at the engagement position so that the rotating shaft can be rotated in the reverse direction, and the winding spring is tightened at the engaging position between the non-rotatable lock engaging portion of the control cam and the rising end of the winding spring, Since the non-rotatable locked state is set, the rotating shaft can be freely rotated in the forward direction, the reverse direction, and stopped at an arbitrary position. Therefore, the rotary drive device can be manufactured with a common structure, that is, with common parts and the like, and can be used in common for various purposes, thereby reducing the cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional front view of a rotary drive device of the present invention, showing the position of a rotary shaft in a positive rotation state.
FIG. 2 is a partial cross-sectional plan view of the 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. 1;
FIG. 3 is a bottom view of a control cam.
4 is a cross-sectional side view taken along line AA in FIG.
5 is a cross-sectional side view taken along the line BB in FIG.
FIG. 6 is a cross-sectional front view of the main part at the control cam position of the rotary drive device of the present invention, showing the reverse rotation state position of the rotary shaft.
7 is a partial cross-sectional plan view of the main part showing the positional relationship between the rising end of the winding spring and the control cam in the position of FIG. 6;
FIG. 8 is a cross-sectional front view of the main part at the control cam position of the rotary drive device of the present invention, showing the non-rotatable locked state position of the rotary shaft.
FIG. 9 is a partial cross-sectional plan view of the main part showing the positional relationship between the rising end of the winding spring and the control cam in the state position of FIG. 8;
FIG. 10 is an exploded perspective view of the rotary drive device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotating shaft 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 Step large diameter part 14 Control ring 15 Control projection 16 Collar 17 Outer case 18 Movement allowance part 19 Stopper 20 Control cam 21 Guide 22 Approximate parallelogram-shaped recess 23 Passing through hole 24 Reverse rotation locking part 25 Non-rotating lock locking part 26 Forward rotation locking part 27 鉤Mold locking portion 28 Screw 29 Receiving hole 30 Receiving hole

Claims (2)

The clutch pipe mounted in the outer case so as to rotate the rotating shaft integrally has a large diameter part and a small diameter part, and a boss having the same diameter as the diameter of the large diameter part can be rotated on the small diameter part. Mount the shaft, turn the boss within the outer case within a small angle range, wind a wrapping spring with a winding force around the boss and the outer periphery of the clutch pipe, and lock one end of the boss on the boss. The other end is free to be bent and raised, while a control cam is provided in the outer case so as to be displaceable in the axial direction of the rotating shaft, and the control cam is locked to the rising other end of the winding spring to Each latching part that makes the rotation, reverse rotation and non-rotatable locked state is provided, and the winding spring is loosened at the engagement position between the forward rotation latching part of this control cam and the standing other end of the winding spring to rotate the rotating shaft forward The control cam reverse rotation locking portion and the other end of the winding spring The winding spring is loosened at the engagement position to allow the rotation shaft to rotate in the reverse direction. Further, the winding spring is tightened at the engagement position between the non-rotating lock engaging portion of the control cam and the rising end of the winding spring, and the rotation shaft is rotated. In this non-rotatable lock state, when a force in the reverse rotation direction is applied to the rotating shaft, the other end of the winding spring rises from the non-rotatable lock engagement portion of the control cam to the normal rotation engagement portion. In this forward rotation enabled state, when the rotation of the rotation shaft stops in the forward rotation direction, the rotation of the rotation shaft is stopped by the resistance of the winding spring, and in this stop state, a force in the reverse rotation direction is applied to the rotation shaft. When applied, the other end of the winding spring rises from the forward rotation engagement portion of the control cam to the reverse rotation engagement portion and becomes in a reverse rotation enabled state. When the reverse rotation of the rotary shaft is stopped in the reverse rotation enabled state, Standing other end of winding spring Move nonrotatably lock engaging portion from the reverse rotation locking part of the control cam was set to unrotatable locked rotary drive. The control cam is constituted by a parallelogram-shaped concave portion, one corner of the concave portion is a reverse rotation locking portion, and the opposite corner is a non-rotatable lock locking portion, which is located at the center of the parallelogram-shaped concave portion. The rotation driving device according to claim 1, wherein a hook-shaped protrusion is provided, and the hook-shaped protrusion is used as a forward rotation locking portion.

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