JP2546405Y2 - Electric roman shade - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a Roman shade provided with a motor for rotating each pulley around which a lifting member is wound.

[0002]

2. Description of the Related Art A Roman shade provided with a self-locking type motor for each pulley around which a screen elevating member is wound,
It is disclosed in JP-A-1-223910. Since the electric Roman shade opens and closes the screen with a small self-locking motor provided for each pulley, for example, an ultrasonic motor, the appearance is cleaner compared to those equipped with one or two large motors, It has many advantages that the sound during opening and closing is quiet, and the opening of the screen can be freely changed.

[0003]

The motor provided for each pulley is rotated forward or backward by a predetermined number of rotations by a drive circuit in the control box. However, the screen fixing position of the lifting / lowering member shifts or the screen moves during use. When the elevating member expands and contracts, the time when the screen reaches the upper limit or the lower limit and the time when the motor stops rotating are not synchronized,
The shape that opened the screen is broken. To correct this, the fastening position of the elevating member must be adjusted according to the motor, but adjustment of the fastening position of the elevating member has not always been easy.

The present invention has been made to solve this problem, and its purpose is to make it easy to stop the motor and reach the upper and lower limits of the screen irrespective of the fixing position of the elevating member. An object of the present invention is to provide an electric roman shade that can be synchronized with a motorized shade.

[0005]

In order to achieve the above-mentioned object, the present invention employs a mechanical rotation counter in which an input shaft is directly connected to a pulley around which a lifting member is wound. A circuit for stopping the rotation of the motor by the upper or lower limit signal of the counter is provided. The tip of the output shaft of the motor is projected from the pulley around which the elevating member is wound, and the input shaft of the counter is connected to the tip via a coupling.

[0006]

The screen is raised and lowered by rotating the motor by rotating the motor. When the lower limit is reached, the lower limit is reset in the counter, and when the upper limit is reached, the upper limit is reset in the counter. The operation of resetting the counter to the upper or lower limit is a very simple operation of simply pressing the upper and lower reset bars or buttons of the counter. Each motor is controlled by a drive circuit so as to stop when the motor rotates by a preset number of rotations. Therefore, if the motor is corrected at upper and lower limit positions, the screen always opens and closes in a predetermined shape. Even if the screen or the elevating member expands and contracts during use, or the fixing position thereof shifts, the shift of the screen opening / closing shape is immediately corrected by resetting the upper and lower limit positions.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus of the present invention will be described based on an embodiment shown in the drawings. As shown in FIG. 1, the Roman shade is composed of a support such as a head rail 10 and a unit fixed to the ceiling surface of a building, a screen 20 having an upper end fixed to the support, and a back surface of the screen. Tapes 22 attached at intervals in the width direction, loops 24 fixed at intervals in the vertical direction of each tape, and loops 24 at the lower end
And has a cord 15 secured at its upper end and pulled up through a loop 24.

Near the upper end of each tape, a U-shaped pulley holder 12 is fixed to the back surface of the head rail 10, and an ultrasonic motor 16 is mounted on one side of the pulley holder. The pulley 14 is fixed to the output shaft 18 of the ultrasonic motor 16,
The upper end of the cord 15 is fixed to the pulley. The output shaft 18 penetrates the pulley 14 and is supported on the opposite side of the pulley holder 12, and its tip is connected to a mechanical counter 27 via a coupling 25.
Is directly connected to the input shaft 26. The counter 27 is fixed to the back surface of the head rail 10. The ultrasonic motor 16 is provided with an encoder 19 for detecting the rotation speed. Although not shown, the wiring of each ultrasonic motor and encoder is collected in a control box. As shown in FIG. 3, the ultrasonic motor is connected to a drive circuit via a reset circuit of the counter, and the drive circuit is connected to a drive power supply. The ultrasonic motor is rotated or stopped in one or the other direction by the drive circuit. Each drive circuit causes the drive control circuit to rotate or stop the motor in either direction according to a signal. Each drive control circuit is controlled by one microcomputer. The microcomputer receives the signal from the encoder of each ultrasonic motor and sets the number of rotations of each ultrasonic motor, and the number of rotations of each ultrasonic motor. Is output. When the open switch or the close switch of the control box is turned on directly or by remote operation, the pulley rotates in the direction of hoisting or rewinding by the number of revolutions set for each ultrasonic motor. Then, the matching circuit outputs a signal to the drive control circuit, and the drive control circuit that has received the signal outputs a signal for stopping the motor to the drive circuit, and the rotation of the motor stops.

When the number of rotations of the central ultrasonic motor 16 is set to be the largest and decrease toward both ends, as shown in FIG. 2, the length of the cord 15 wound around the pulley 14 is maximum at the center and at both ends. As it gets smaller, the screen 20 opens in a chevron. By adjusting the number of revolutions of each ultrasonic motor by the microcomputer, the cord winding length of each pulley can be freely changed, so that it is quite easy to change the shape.

Since the ultrasonic motor is self-locked, that is, the holding torque is larger than the starting torque, it can be said that the wound screen does not fall by its own weight. The input shaft 26 of the counter 27 is directly connected to the output shaft 18 of the ultrasonic motor 16 via the coupling 25. Since the upper and lower reset bars 28, 29 of the counter 27 protrude from the back or bottom surface thereof, the reset can be easily operated with a fingertip. Ultrasonic motor
Rotate the screen 16 to raise or lower the screen 20. When the screen 20 reaches the upper or lower limit, operate the upper or lower reset bar (28 or 29) of the counter 27 to operate the counter 27.
Set the upper or lower limit of.

As shown in FIG. 3, the current of the drive power supply enters the ultrasonic motor via the drive circuit, and there is a reset circuit of the counter between them, and the reset circuit turns off when the screen reaches the upper limit or the lower limit. Therefore, the ultrasonic motor always stops when the screen reaches the upper limit or the lower limit. By operating the upper and lower reset bars 28 and 29 of the respective counters 27 at the time of setting the Roman shade, the stop of the rotation of the ultrasonic motor 16 and the reaching of the upper or lower limit of the screen 20 can be extremely easily synchronized. During use, partial expansion and contraction of screen 20, expansion and contraction of each cord 15,
If the stop of the motor rotation and the reaching of the upper and lower limits of the screen are not synchronized due to cutting or the like, the opening and closing shape of the screen will be distorted from the predetermined shape. The opening / closing shape returns to a predetermined shape. In the embodiment, the pulley is driven by the ultrasonic motor, but the motor need not be limited to the ultrasonic motor.

[0012]

As described above, the Roman shade of the present invention adjusts the code for raising and lowering the screen to synchronize the stop of each motor and the reaching of the upper or lower limit of the screen part which is raised and lowered by each motor. Unlike the motor, the input shaft of the mechanical counter is directly connected to the output shaft of the motor coaxially, so simply operating the upper or lower reset bar of the counter will stop each motor and move the screen up and down by each motor. There is an excellent effect that the reaching of the upper limit or the lower limit of the portion can be extremely easily synchronized.

[Brief description of the drawings]

FIG. 1 is a partial front view of a Roman shade according to the present invention, showing a state where a screen is lowered to a lower limit.

FIG. 2 is a partial front view showing a state where the Roman shade of FIG. 1 is opened to a predetermined shape.

FIG. 3 is a block diagram showing a control circuit of the present invention.

[Explanation of symbols]

 10: Head rail (support) 12: Pulley holder 14: Pulley 16: Motor 18: Output shaft 20: Screen 22: Tape (elevating member) 26: Input shaft 27: Counter

Claims (1)

(57) [Scope of request for utility model registration] 1. A vehicle comprising: a support; two or more pulley holders fixed to the support; motors mounted on the respective pulley holders; and a pulley fixed to an output shaft of the motor and winding a lifting member of a screen. An electric Roman shade, wherein an input shaft of a resettable mechanical counter is directly connected coaxially to the output shaft.