JPH108858A - Ascent/decent and rotation operation device for venetian blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ascent/descent and rotation operating device that can switch a rotating control rod and an ascent/descent cord for a Venetian blind very easily between front and rear positions. SOLUTION: A cylindrical movable end part 14 is connected to one side end part of a head rail 10 in such a way as to be rotatable between longitudinal first and second fixed positions around a shaft 18 for rotating a This movable end part 14 is provided with a holder 17 for bearing a rotary shaft 16 of a gearing 20 for rotating the shaft 18. A control rod is connected to the rotary shaft 16. protruded to the outside from the movable end part 14, through a universal coupling. A elevating cord 13 for elevating the slat is also hung down from the movable end part 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting / lowering operation device for a venetian blind, and more particularly, to a mechanism for switching an operation rod for operating a vertical rotation operation device and a lifting / lowering cord back and forth. Things.

[0002]

2. Description of the Related Art A mechanism for switching an operation rod projecting from a head rail of a venetian blind and a lifting cord back and forth is known from Japanese Patent Laid-Open No. 6-200685. In this known mechanism, a gear box containing a gear that rotationally drives a shaft that rotates a slat is provided so as to be partially rotatable around the shaft, and the gear box is fixed to a head rail at least at two front and rear angular positions. Was made possible.

[0003]

In the known mechanism, the operating rod protruding from the fixed head rail is rotated back and forth to switch. Therefore, the opening of the operating rod protruding from the head rail is adjusted according to the rotation of the front operating rod. I had to extend it. As a result, there is a problem that the appearance of the head rail becomes unsightly. In addition, a spacer is used to fix the gear box to the head rail, but when switching the operating rod back and forth, the spacer has to be pulled out and turned over, so that the work of switching back and forth is not always easy. there were.

The present invention has been made to solve these problems, and an object of the present invention is to provide a mechanism capable of switching back and forth between operation rods and the like, so that the work for switching back and forth is easy. Another object of the present invention is to provide a head rail that does not require an opening to impair the appearance of the head rail.

[0005]

In order to achieve the above-mentioned object, a means adopted by the present invention is to provide a separate movable end on one side of a head rail of a venetian blind, and to provide an operating rod or the like on the movable end. And the movable end thereof is rotatably mounted at least between the front and rear fixed positions about the shaft. Since the front and rear switching of the operation rod and the like is performed only by rotating the movable end, the operation of switching back and forth is extremely easy, and there is no need to provide an unnatural opening in the movable end.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments shown in the drawings. The venetian blind shown in FIGS. 1 and 2 rotates an operating rod 11 hanging from one end of a head rail 10 to rotate a slat 12, and operates a lifting cord 13 pulled out from the bottom of the operating rod to operate the slat.
This is a method of raising and lowering 12.

Since the operating rod 11 shown by a solid line in FIGS. 1 and 2 hangs down from the movable end 14 at the right end of the head rail 10, this blind is right-handed for operation, but as shown by a chain line in FIG. When the operating rod 11 is turned to the back side symmetrically with respect to a vertical plane passing through the center of the head rail 10, the blind becomes left-handed in operation. The operation rod 11 is hollow, and is connected to a hollow rotary shaft 16 via a hollow universal joint 15. Rotating shaft 16 is movable end
It is rotatably supported by a holder 17 fixed to 14.

As shown in FIGS. 3 and 4, the movable end 14 of the first embodiment is coupled to the head rail 10 via a mount 30 so as to be at least partially rotatable about the shaft 18. A bevel gear 19 is fixed to an end of the shaft 15, and the bevel gear 19 is supported by a holder 21 attached to the head rail 10. The hollow bevel gear 20 meshes with the bevel gear 19, and the hollow bevel gear 20 is fixed to the hollow rotary shaft 16.

Although not shown, a drum is fixed to the shaft 18, and the upper end of a ladder cord for rotating the slat is hung on the drum. The lifting cord 13 for raising and lowering the slat enters the inside of the hollow bevel gear 20 and the rotating shaft 16 via the guide roll 22. The guide roll 22 is supported by a holder 23 provided on the inner peripheral surface of the movable end 14. This lifting code
Pulling 13 raises the slat, locking stops the slat in that position, and lowers the slat by its own weight when loosened.

First and second concave portions are formed in the end face of the head rail 10.
25 and 26 are provided, and a convex portion 24 is provided on the outer peripheral surface of the movable end portion 14.
The convex portion 24 fits into the first concave portion 25 when the movable end portion 14 is at the position shown by the solid line, and fits into the second concave portion 26 when it is at the position shown by the chain line. When changing the blind raising / lowering operation device from right-handed to left-handed, that is, when moving the operating rod 11 from the position indicated by the solid line to the position indicated by the chain line, the convex portion 24 is movable so as to pass over the first concave portion 25. Turn the end 14 slightly in the direction of the arrow.
The operating rod 11 rotates about the shaft 18 together with the movable end 14.

As described above, the device of the present invention can extremely easily switch the position of the operating rod of the blind back and forth, and the operating rod rotates together with the movable end part of the head rail. It is not necessary to provide an opening in the movable end for rotating the bar back and forth. As shown in the second embodiment of FIG. 5, the guide roll 22 may be provided at a position between the bevel gear 20 and the shaft 18. In this case, the shaft 18
The bevel gear 19 fixed to the movable bearing 14 is not supported by the holder fixed to the head rail, but is supported by the holder 21 fixed to the movable end portion 14.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Another embodiment shown in the drawings will be described. FIG.
In the third embodiment shown in FIG. 7, a lifting cord 13 for raising and lowering the slat 12 and an operating rod 11 for rotating the slat 12 are provided on a blind which is separated from a head rail and hangs down. The connection between the head rail 10 and the movable end 14 is the same as in the previous embodiment. The operating rod 11 is connected to a rotating shaft 16 via a universal joint 15, and the rotating shaft is rotatably supported by a holder 17 fixed to the movable end 14. The elevating cord 13 hangs from a cord lock 28 fixed to the movable end 14 by a holder 27.

When the movable end 14 is at the right hand position shown in FIG. 7, the holder 17 and the cord lock 28 are at the position indicated by the solid line, but the movable end 14 is turned around the shaft 18 to the left hand position. When it moves, the holder 17 and the code lock 28 come to the left-hand position of the chain line. The operation rod 11 connected to the rotating shaft 16 supported by the holder 17 and the lifting cord 13 passing through the code lock 28 also shift from the right-hand position to the left-hand position. The position of the solid line and the position of the chain line are symmetric with respect to the center of the shaft 18.

As shown in FIG. 7, the rotating shaft 16 and the shaft 18
Are connected via the coil spring joint 29, the rotation shaft 16 smoothly shifts from the right-hand position to the left-hand position, and the rotation transmission from the rotation shaft 16 to the shaft 18 does not change. Instead of the coil spring joint, it is also possible to use a gear transmission by fixing a bevel gear to the shaft and the rotating shaft, as in the above embodiment.

[0015]

As described above, in the conventional apparatus, when switching the operation rod from the front side to the rear side, the spacer for fixing the gear box is removed from the head rail, and then the operation rod integrated with the gear box is moved rearward around the shaft. The device of the present invention can rotate between at least two front and rear fixed positions around the shaft at the end of the head box, while rotating and reversing the removed spacer had to be inverted and attached to the head rail. A movable end is provided, and an operating rod for rotating and raising and lowering the slat from the movable end and a lifting / lowering cord are hung down. It is possible to switch the operation rod of the blind and the lifting cord back and forth, and unlike the conventional device, the operation rod is pivoted back and forth. An excellent effect that need not be provided with an opening.

[Brief description of the drawings]

FIG. 1 is a partial front view of a venetian blind equipped with the device of the first embodiment of the present invention;

FIG. 2 is a side view of the venetian blind of FIG. 1,

FIG. 3 is a vertical sectional view of the movable end of FIG. 1,

FIG. 4 is a view taken along the line IV-IV in FIG. 3;

FIG. 5 is a view corresponding to FIG. 4 of the second embodiment,

FIG. 6 is a view corresponding to FIG. 1 of the third embodiment,

FIG. 7 is a view corresponding to FIG. 4 of the third embodiment,

[Explanation of symbols]

 10: Head rail 11: Operation rod 12: Slat 13: Elevating cord 14: Movable end 15: Universal joint 16: Rotating shaft 17: Holder 18: Shaft 19: Bevel gear 20: Bevel gear 21: Holder 22: Guide roll 23: Holder 24: convex portion 25: first concave portion 26: second concave portion 27: holder 28: code lock 29: coil spring joint 30: mount

Claims (3)

[Claims] 1. A cylindrical movable end (14) is rotated at one end of a head rail (10), in which a shaft (18) for rotating a slat (12) is installed, on one side of the head rail (10). The movable end is provided with a holder (17), and the holder bears the rotation shaft (16) of the means (20, 29) for rotating the shaft, and projects from the movable end to the outside. Operating rod (11) via the universal joint (15) to the rotating shaft
And a lifting cord (13) for raising and lowering the slats is hung from the movable end. 2. A rotary shaft (16), a universal joint (15) and an operating rod (11) are hollow, and a lifting cord (13) is connected to a movable end (14).
2. A lifting and lowering rotation operating device for a venetian blind according to claim 1, wherein the device is passed through the hollow rotary shaft inside and then drawn out from the hollow universal joint through the hollow operating rod. 3. A venetian blind according to claim 1, wherein a cord lock (28) is provided on the peripheral surface of the movable end (14), and the lifting cord (13) is drawn out through the cord lock. Lifting operation device.