JP2744562B2 - Electric blind slat drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slat drive device for an electric blind which raises / lowers and adjusts an angle of a slat of a horizontal blind by driving force of a motor.

[0002]

2. Description of the Related Art Conventionally, as one type of electric blind,
There is one shown in FIG. That is, the motor 2 is disposed in the head box 1, and the slat drive shaft 3 is rotated by the operation of the motor 2.

The slat drive shaft 3 has a tilt drum 4
A ladder cord 5 is suspended from the tilt drum 4 and a plurality of slats 6 are supported on the ladder cord 5. When the slat drive shaft 3 is driven to rotate, the slats 6 are tilted in phase via the tilt drum 4 and the ladder cord 5, and when the slats 6 are tilted to the vertical direction, the tilt drum 4 and the slats are tilted. The slat drive shaft 3 is idled with respect to the tilt drum 4 by the action of the clutch device which is interposed between the drive shaft 3 and does not transmit torque of a predetermined value or more, so that each slat 6 does not further tilt. It has become.

[0004] The slat drive shaft 3 is formed in a hexagonal rod shape, and the slat drive shaft 3 is inserted into the center of the spiral pulleys 7a and 7b. And the spiral pulleys 7a, 7b
Is supported so as to be rotatable integrally with the slat drive shaft 3 and to be movable in the axial direction.

[0005] Screws are engraved on the outer peripheral surfaces of the spiral pulleys 7a and 7b, and the screws are screwed to an elevating device 8 fixed in the head box 1. The upper ends of the lifting cords 9a and 9b are connected to one ends of the spiral pulleys 7a and 7b.

Therefore, when the slat drive shaft 3 is rotated in the slat lifting direction, the spiral pulleys 7a and 7b are moved in the axial direction of the slat drive shaft 3 while rotating, and the lifting / lowering cords 9a and 9b are moved in the spiral pulley 7a. , 7b and spirally wound up from the lower slat 6. When the slat drive shaft 3 is rotated in the slat descent direction, the elevating cords 9a, 9b are driven by the spiral pulleys 7a, 7b.
The slat 6 is lowered by being rewound from b.

[0007]

However, in the above-mentioned electric blind, when the slat 6 is raised and lowered, the slat 6 is tilted in the vertical direction. Each slat 6
Is rubbed against the periphery of the lifting cord insertion hole.

Therefore, abnormal noise is generated during the lifting operation,
Alternatively, there may be a problem that the lifting cords 9a and 9b are cut due to abrasion. After the slat 6 is raised and lowered to a desired height, it is necessary to reversely rotate the motor 2 to adjust the angle of the slat 6 to a desired angle, and the operation is complicated.

In view of the above, there has been proposed an electric blind in which the operation of raising and lowering the slat 6 and the operation of adjusting the angle of the slat 6 are performed independently using respective motors. However, in such an electric blind, it is necessary to house two motors in the head box 1 and house a drive shaft for raising and lowering the slats and a drive shaft for adjusting the slat angle in the head box 1. Therefore, there is a problem that the size of the head box 1 is increased and the configuration of the slat drive device is complicated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a slat drive device that enables a slat elevating operation and an angle adjusting operation using a common motor, and also enables an elevating operation without tilting the slat. .

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention achieves the above object by suspending and supporting a multistage slat from a head box via a ladder cord, and using a lifting cord for elevating each slat. The ladder cord is inserted into a slat, the ladder cord is supported by a tilt drum disposed in a head box, the lifting cord is supported by a pulley disposed in the head box, and a motor of the motor disposed in the head box is supported. The slat drive shaft is rotated by the driving force, the pulley is rotated based on the rotation of the slat drive shaft, and the lifting / lowering cord is wound up or rewinded, and the slat is raised / lowered, based on the rotation of the slat drive shaft. By rotating a tilt drum, each of the slats can be tilted in the same phase, and the slat is vertically positioned between the slat drive shaft and the tilt drum. In the electric blind interposed with a clutch device that causes the slat drive shaft to idle with respect to the tilt drum when tilted to the state, the motor may be any one of a lift operation signal for raising and lowering the slat and an angle adjustment operation signal for adjusting the angle of the slat. And a brake device for preventing rotation of the tilt drum based on the elevating operation signal is provided in the head box.

[0012]

According to the above-mentioned means, the brake device is operated at the time of raising / lowering operation of the slat to prevent the rotation of the tilt drum. Therefore, when the slat is raised and lowered, the slat is raised and lowered without being tilted.

[0013]

FIG. 1 shows an embodiment of the present invention. The same components as those in the conventional example will be described with the same reference numerals.

In the electric blind shown in FIG. 1, a motor 2 is provided in a head box 1. The motor 2 is activated when either a lifting operation signal SG1 of the slat 6 output from an operation switch (not shown) or an angle adjustment operation signal SG2 of the slat 6 output from the operation switch is input. Then, the slat drive shaft 3 is rotated by the operation of the motor 2.

The slat drive shaft 3 has a tilt drum 4
A ladder cord 5 is suspended from the tilt drum 4 and a plurality of slats 6 are supported on the ladder cord 5. When the slat drive shaft 3 is rotationally driven, each slat 6 is tilted in the same phase via the tilt drum 4 and the ladder cord 5, and when each slat 6 is tilted to the vertical direction, the clutch device tilts. An idle rotation occurs between the drum 4 and the slat drive shaft 3 so that each slat 6 does not tilt any more.

The slat drive shaft 3 is formed in a hexagonal rod shape, and the slat drive shaft 3 is inserted into the center of the spiral pulleys 7a and 7b. And the spiral pulleys 7a, 7b
Is supported so as to be rotatable integrally with the slat drive shaft 3 and to be movable in the axial direction.

Screws are engraved on the outer peripheral surfaces of the spiral pulleys 7a and 7b, and the screws are screwed to an elevating device 8 fixed in the head box 1. The upper ends of the lifting cords 9a and 9b are connected to one ends of the spiral pulleys 7a and 7b.

A first gear 10 is fixed to the tilt drum 4 and is rotatable integrally with the tilt drum 4. The head box 1 includes a brake shaft 11.
Is rotatably supported, and its brake shaft 11 is fixed through the center of a second gear 12, and the second gear 12 meshes with the first gear 10.

Therefore, when the tilt drum 4 is rotated,
The brake shaft 11 is rotated via the first and second gears 10 and 12. A brake device 13 is connected to one end of the brake shaft 11. The brake device 13 utilizes, for example, the operation of an electromagnetic solenoid, and operates when the elevation operation signal SG1 output from the operation switch is input to prevent the rotation of the brake shaft 11.

In the electric blind constructed as described above, the lifting / lowering operation signal SG1 is input to the motor 2 and the brake device 13 when the slat 6 is raised / lowered. Then, the rotation of the brake shaft 11 is prevented by the brake device 13. Therefore, the second gear 12
Further, the rotation of the tilt drum 4 is prevented via the first gear 10.

In this state, when the motor 2 is operated based on the elevation operation signal SG1, the slat drive shaft 3 idles with respect to the tilt drum 4, and the helical pulleys 7a and 7b rotate with the rotation of the slat drive shaft 3. The elevating cords 9a, 9b are spirally wound or unwound by the spiral pulleys 7a, 7b.

Therefore, when the slat 6 is moved up and down, the slat 6 is moved up and down without being tilted. On the other hand, during the angle adjusting operation of the slat 6, the elevation operation signal SG1 is not input to the brake device 13, so that the operation of the brake device 13 is released, and the tilt drum 4 becomes rotatable together with the slat drive shaft 3. Therefore, the motor 2 is operated based on the angle adjustment operation signal SG2, the tilt drum 4 is rotated via the slat drive shaft 3, and the angle can be adjusted in a range until the slat 6 is tilted in the vertical direction.

As described above, with this electric blind, the rotation of the tilt drum 4 can be prevented by operating the brake device 13 when the slat 6 is raised and lowered, so that the slat 6 can be raised and lowered without tilting. Therefore, it is possible to prevent the lifting cords 9a, 9b from being rubbed with the lifting cord insertion holes of the respective slats 6, so that it is possible to prevent the lifting cords 9a, 9b from being cut due to wear or generating abnormal noise.

Also, during the angle adjustment operation, the brake device 1
Since the operation of the motor 3 is stopped, the tilt drum 4 can be rotated via the slat drive shaft 3 by the operation of the motor 2 to adjust the angle of the slat 6.

In the above embodiment, the lifting codes 9a, 9
b is spirally wound around the spiral pulleys 7a and 7b. However, the present invention can be similarly applied to an electric blind configured to elevate and lower the slats by winding or unwinding the elevating tape on the pulley. .

[0026]

As described above in detail, the present invention enables a slat drive device which enables a slat elevating operation and an angle adjusting operation by using a common motor, while enabling a slat elevating operation without tilting the slat. It can provide an excellent effect.

[Brief description of the drawings]

FIG. 1 is a front view showing a horizontal blind of one embodiment.

FIG. 2 is a front view showing a conventional horizontal blind.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head box 2 Motor 3 Slat drive shaft 4 Tilt drum 5 Ladder code 6 Slat 7a, 7b Pulley 9a, 9b Elevating cord 13 Brake device

Claims (1)

(57) [Claims] 1. A multi-stage slat (6) is suspended and supported from a head box (1) through a ladder cord (5).
Elevating cord (9) for elevating each slat (6)
a, 9b) is inserted into each slat (6), the ladder cord (5) is supported by a tilt drum (4) disposed in a head box (1), and the elevating cord (9a, 9) is supported.
b) is a pulley (7) disposed in the head box (1).
a, 7b), the slat drive shaft (3) is rotated by the driving force of a motor (2) disposed in the head box (1), and the slat drive shaft (3) is rotated based on the rotation of the slat drive shaft (3). The pulleys (7a, 7b) are rotated to raise and lower the cord (9).
a, 9b) is wound or unwound to raise and lower the slats (6), and to rotate the tilt drum (4) based on the rotation of the slat drive shaft (3) to make the slats (6) identical. When the slat (6) is tilted to a vertical state, the slat drive shaft (3) is tilted to the tilt drum (4) between the slat drive shaft (3) and the tilt drum (4). On the other hand, in the electric blind in which a clutch device for idling is interposed, the motor (2) includes an elevating operation signal (SG1) for elevating and lowering the slat (6) and an angle adjusting operation signal (SG2) for adjusting the angle of the slat (6). And a brake device (13) for preventing rotation of the tilt drum (4) based on the elevation operation signal is provided in the head box (1). Blinds slat drive.