JPH0537831Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a curtain opening/closing drive mechanism, for example, which is used to open/close curtains stretched on the inside of a window in a general home using motor output. .

(B) Conventional technology Conventionally, this type of curtain opening/closing drive mechanism involves winding a curtain string around a pulley that is directly connected to a motor.
It had a structure in which the curtain was moved along with the strings by the rotation of a motor.

Therefore, when manually opening and closing the curtains, it is necessary to rotate the pulley and motor via the curtain strings, which causes problems such as excessive load and the possibility of the curtain strings breaking.

One way to solve this problem is to insert a ball clutch in series with the drive pulley (for example, Japanese Patent Laid-Open No. 60-23630).

However, in the case of such a conventional device, the drive pulley is bulky and large, and the device is difficult to attach to the curtain rail.Furthermore, the tension load of the endless belt that opens and closes the curtain is increased by the motor. However, there were problems such as a large motor load when the motor was hung on the shaft.

(c) Problems to be solved by the invention This invention allows the curtain to be opened and closed manually by the clutch only when the motor is driven, and the opening/closing drive mechanism can be made compact in shape. An object of the present invention is to provide a curtain opening/closing drive mechanism that does not burden a motor shaft with the tension load of a belt for opening and closing the curtain.

(d) Means for solving the problem This invention involves fitting an output rotating body to the outer periphery of the input rotating body so as to allow relative rotation, and attaching a clutch ball to the outer periphery of the input rotating body in the direction of action of centrifugal force. The clutch ball is stored on the inner peripheral surface of the output rotating body facing the clutch ball so as to be able to come out and go out, and when the clutch ball comes out, it comes into contact with the groove end and transmits both the rotating bodies. A groove is formed at the bottom of the groove to allow the clutch ball to return to the input rotating body by its own weight, and a bearing portion is formed at the upper and lower outer peripheries of the output rotating body to be attached to the mounting frame. The invention is characterized by a curtain opening/closing drive mechanism.

(E) Effect According to this invention, the output rotating body is attached to the mounting frame via the upper and lower bearing portions of the output rotating body. When the motor is driven, the rotation of the input rotating body causes the clutch ball to protrude toward the output rotating body, connecting both rotating bodies in a transmission state, and when the input rotating body stops rotating, the clutch ball Since the clutch returns to the input rotating body side, the clutch is engaged only when the motor is driven, and is disengaged under normal conditions, so the curtain can be opened and closed manually with a light load.

(f) Effects of the invention As a result of the above, according to this invention, the output rotating body is formed by fitting around the outer periphery of the input rotating body.
Since the thickness of these rotating bodies can be formed by one conventional pulley, the opening/closing drive mechanism becomes small and compact, and because of its compactness, it is easy to attach to the curtain rail.

Furthermore, bearings are formed on the top and bottom of the outer output rotating body, so by bearing these parts on the mounting frame, the tension of the curtain opening/closing belt wound around the output rotating body is applied to the mounting frame and the motor Since no load is placed on the shaft, the life of the motor can be extended.

(G) Example of the invention An example of the invention will be described below in detail based on the drawings.

The drawings show a curtain opening/closing drive mechanism, and in FIGS. 1 to 3, the curtain opening/closing drive mechanism 1 connects an input rotating body 4 to a driving shaft 3 of a motor 2 by, for example, spline fitting. are doing.

An output rotary body 5 formed of divided rotary bodies 5a and 5b divided into upper and lower parts is fitted onto the outer peripheral side of the input rotary body 4 so as to be able to rotate relative to the input rotary body 4. ing.

Further, storage recesses 7 for the clutch balls 6 are formed at a plurality of locations (two locations in the figure) on the outer circumference of the input rotary body 4, and the output rotor 5 faces the storage recesses 7.
An arcuate groove 8 for engaging the clutch ball 6 is formed on the inner circumferential surface of the lower divided rotating body 5a, and the bottom of this groove 8 is formed as an inclined surface 9 facing inward.

The above-mentioned upper and lower divided rotary bodies 5a and 5b are fixed with appropriate fixing means such as screws, and bearing parts 5c and 5c are formed on the upper and lower outer peripheries, and the bearing parts 5c and 5c are connected to the upper and lower bearings. 10a, 10a, and each divided rotating body 5
A V-groove portion 12 is formed on opposing surfaces of the outer peripheral portions of a and 5b, and a belt 13 is stretched over this V-groove portion 12.

Note that the motor 2 is attached to the above-mentioned attachment frame 10. In addition, numeral 11 in the figure is a tension pulley for the belt 13.

The curtain opening/closing drive mechanism 1 thus constructed is put into use as shown in FIG.

That is, one end of the endless belt 13 is stretched over the V-groove portion 12 of the output rotating body 5 described above, and the other end of the belt 13 is stretched over the guide pulley 14.

A leading runner 16 for the right curtain 15 is fixed to the back side 13a of the belt 13, and a leading runner 18 for the left curtain 17 is fixed to the front side 13b.

Furthermore, each of the above-mentioned leading runners 16 and 18 and the curtain 1 corresponding to each of these runners 16 and 18 are provided.
5 and 17 are connected to each other with locking tools 19 and 20 for use.

In the curtain opening/closing drive mechanism used in this manner, the clutch ball 6 housed in the recess 7 of the input rotating body 4 is moved by the rotation of the motor 2.
It moves outward due to centrifugal force and enters the arcuate groove 8 of the output rotor 5, and controls the rotation of the input rotor 4 through the corner of the recess 7, the clutch ball 6, and the groove end of the arcuate groove 8. , the output of the motor 2 is transmitted to the output rotating body 5, and the curtains 15, 17 are opened and closed via the belt 13, runners 16, 18, and locking devices 19, 20.

When the opening/closing operations of the curtains 15 and 17 or the rotation of the input rotary body 4 are stopped, the clutch ball 6 is rolled and stored in the recess 7 of the input rotary body 4 along the slope 9 at the bottom of the arcuate groove 8 due to its own weight. .

In this state, the clutch mechanism is disengaged, so the curtains 15, 17 can be opened and closed manually.

Since there is no need to rotate the input rotating body 4 during this opening/closing, manual opening/closing of the curtains 15, 17 can be performed smoothly.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a plan view of the curtain opening/closing drive mechanism, Fig. 2 is a partially vertical front view of Fig. 1, and Fig. 3 is a plan view of a part of Fig. 2. FIG. 4 is a schematic view showing how the drive mechanism is used. 1... Opening/closing drive mechanism, 2... Motor, 3... Driving shaft, 4... Input rotating body, 5... Output rotating body, 5
c...Bearing portion, 6...Clutch ball, 7...Storage recess, 8...Circular groove, 9...Slanted surface, 15,1
7...Curtains.

Claims (1)

[Claims for Utility Model Registration] A curtain opening/closing drive mechanism comprising an input rotating body that rotates with a motor output and an output rotating body that is transmitted from the input rotating body and drives the curtain to open and close, comprising: An output rotating body is fitted to the outer circumference of the input rotating body so as to be relatively rotatable, a clutch ball is housed on the outer circumferential surface of the input rotating body so as to be movable in and out in the direction of action of centrifugal force, and the clutch ball of the output rotating body is A groove is formed on the inner circumferential surface facing the clutch ball to allow the clutch ball to protrude, and at the time of the protrusion, abuts the groove end to connect both rotating bodies in a transmission state, and at the bottom of the groove, A curtain opening/closing drive mechanism, wherein an inclined surface is formed to return the clutch ball to the input rotation side by its own weight, and bearings are formed on the upper and lower outer peripheries of the output rotary body to be attached to a mounting frame.