JPH0828167A - Electric roll blind - Google Patents

Abstract

PURPOSE:To eliminate readjustment of a sensor due to variation of a position in the axial direction of a roll pipe as well as to restrain noise of the roll pipe and a blind box accompanying rotation of a motor in an electric roll blind in a type to detect an optical reflector fixed on an end surface of the roll pipe by a sensor provided on a holder of the roll pipe and to control the motor by a signal of the sensor. CONSTITUTION:Oscillation is absorbed by interposing vibration-proof materials between a drive rotor 13 to transmit rotation of a motor 10 to a roll pipe 30 and the roll pipe 30 and between a motor case 11 and a holder 16 to fix it. Additionally, a position in the axial direction is regulated by fitting an end rotor 27 of a roll pipe 20 on a small diametrical part 26 of the holder 16 externally and free to rotate and sandwiching the end rotor 27 between an outer diametrical part 22 of the holder 16 and a claw 29 provided on the small diametrical part 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an electric roller blind of a type in which an optical sensor detects a light reflecting plate attached to an end surface of a roll to control a motor.

[0002]

2. Description of the Related Art A fixed holder, a motor in which a motor case is fixed to the holder, a screen winding roll pipe in which the motor case is inserted and the end is rotatably supported by the holder, and a roll pipe thereof. In an electric roll blind equipped with a drive rotor fixed to the output shaft of a motor and engaged with the inner peripheral surface of a roll pipe for rotationally driving the pulley, a pulley is fixed to the rotary shaft that rotates integrally with the roll vipe, and the pulley Attach a reflector to the end face of
JP-A-2-190591 discloses that the light reflecting plate is detected by an optical sensor fixed to a holder that supports a roll pipe, and the motor is controlled by the signal of the sensor.
No. Further, the inventor of the present application has proposed that a light reflecting plate is attached to the end surface of the roll pipe to make the structure more compact (Japanese Patent Application No. 5-230725).

[0003]

When a light reflecting plate is attached to the end face of the roll pipe and a sensor facing the light reflecting plate is provided on the holder supporting the roll pipe, the roll pipe and the roll pipe are vibrated by the rotation of the motor. There is a problem that the blind box causes noise and the axial position of the roll pipe fluctuates, so that the sensor must be readjusted.

The present invention has been made to solve this problem, and its object is to suppress the vibration transmitted from the motor to the roll pipe and the blind box to reduce noise. There is no need to readjust.

[0005]

In order to achieve the above-mentioned object, means adopted by the present invention are as follows: Between a drive rotor and a roll pipe for transmitting the rotation of a motor to a roll pipe, and between a fixed part of a motor case and its fixed part. The vibration-proof material is interposed between the holders for holding the roller, and the end rotor, which is the end portion of the roll pipe, is rotatably attached to the holder, but is non-slidably fitted in the axial direction.

[0006]

Since the drive rotor for transmitting the rotation of the motor to the roll pipe is connected to the roll pipe via the vibration isolator, and the fixed portion of the motor case is also connected to the holder via the vibration isolator, the vibration of the motor rolls. Both direct transmission to the pipe and transmission to the blind box via the holder are suppressed. As a result, it is possible to prevent the roll pipe and the blind box from generating noise due to the vibration of the motor.

Since the end rotor of the roll pipe is fitted in the holder so that it cannot move in the axial direction, the axial position of the roll pipe is stable, and the distance between the light reflecting plate on the end face and the optical sensor provided in the holder is always constant. Therefore, once set, there is no need to readjust.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The device of the present invention will be described based on the embodiments shown in the drawings. As shown in FIG. 1, the electric roll blind motor 10 is housed in a motor case 11, and the motor case 11 is inserted into a roll pipe 20. As shown in FIGS. 1 and 2, a drive rotor 13 is fixed to an output shaft 12 of a motor 10, and a vibration isolator 14 is externally fitted and fixed to the drive rotor 13.
The outer peripheral surface of the vibration isolator 14 has a shape along the inner peripheral surface of the roll pipe 20, and when it is inserted into the roll pipe 20, it rotates integrally with the roll pipe, but is slidable in the axial direction.

As shown in FIGS. 1 and 3, the motor case
The prismatic fixing portion 15 of 11 is covered with a vibration-proof material 19, and the fixing portion 15 is inserted into the square hole 31 of the holder 16. The holder 16 is fixed to the side holder 17 on one side with a set screw 18, and the side holders on both sides are connected by a set bar 21. holder
A fan-shaped groove 24 is provided in the upper half of the end surface of the large-diameter portion 22 of 16 and the fan-shaped groove is formed.
A plurality of windows (23) opening in the axial direction are provided at the bottom of (24). Two sensors 30 are arranged at the positions of the respective sensor windows 23. The pin 25 is attached to the tip of the fixed portion 15 so that the motor case 11 does not come out from the side holder 17 inward.

As shown in FIGS. 1 and 4, the end rotor 27 of the roll pipe 20 is rotatably fitted onto the small diameter portion 26 of the holder 16. A light reflection plate 28 is attached to the outer end surface of the end rotor 27. Both end surfaces of the end rotor 27 are sandwiched by the claws 29 formed on the end peripheral surfaces of the large diameter portion 22 and the small diameter portion 26 of the holder 16, and the axial position is restricted. When assembling the roller blind, the end rotor 27 is first fitted onto the small diameter portion 26 of the synthetic resin holder 16. At this time, the inner diameter of the end rotor 27 is slightly smaller than the outer diameter of the claw 29 of the small diameter portion 26, but since the claw 29 projects axially inward of the small diameter portion 26, the claw 29 is elastically moved in the inner radial direction. The end rotor 27 can be deformed and fitted onto the small diameter portion 26. When the outer end surface of the end rotor 27 fitted on the small diameter portion 26 comes into contact with the large diameter portion 22, the claw 29 is restored and hooks on the inner end surface of the end rotor 27.
Cannot slide axially.

Next, the vibration-proof materials 14 and 19 are attached to the drive rotor 13 of the motor 10 and the fixed portion 15 of the motor case 11, the fixed portion 15 is inserted into the square hole 31 of the holder 16, and the pin 25 is attached to the tip thereof. Insert. Then, the side holder 17 is fixed to the holder 16 by the set screw 18. Then, the motor case 11 is inserted into the roll pipe 20 in the axial direction by aligning the vibration damping material 14 fitted to the drive rotor 13 with the inner peripheral surface of the roll pipe 20. Then, the end rotor 27 is fitted into the end portion of the roll pipe 20 to be integrated.

In the electric roller blind thus assembled, the rotation of the motor 10 is transmitted to the roll pipe 20 via the vibration isolator 14, and the motor case 11 housing the motor 10 is held via the vibration isolator 19 to the holder. Since it is supported by 16, the vibration accompanying the rotation of the motor 10 is absorbed by both the rotating side and the fixed side. Therefore, there is no possibility that noise will be generated in the blind box integrated with the roll pipe 20 or the holder 16 due to the transmission of vibration.

The end rotor 27 is freely rotatable on the small diameter portion 26 of the holder 16, but since it is fitted on the end surface so as not to be slidable in the axial direction, the light reflecting plate 28 fixed to the end surface of the end rotor 27 and the large diameter of the holder 16. Department
The distance between the sensors 30 fixed to 22 is always constant.
Therefore, if the sensor is adjusted first, there is no need to readjust the sensor 30 during use.

[0014]

As described above, the electric roll blind of the present invention is a system in which the light reflecting plate on the end face of the roll pipe is detected by the sensor provided in the holder and the rotation of the motor is controlled by the signal of the sensor. By directly rotating the roll pipe by the conventional motor drive rotor,
Unlike the case where the motor case is directly fixed to the holder, the rotation of the motor is transmitted to the roll pipe via the vibration isolator, and the motor case is attached to the holder via the vibration isolator. This has an excellent effect that the roll pipe and the blind box do not generate noise due to the vibration. Also, unlike the conventional roll pipe in which the axial position of the roll pipe with respect to the holder is not regulated, the end rotor of the roll pipe is fitted onto the holder so as not to move in the axial direction. The relative position of is always constant, and if it is adjusted at the beginning, it is not necessary to readjust the sensor thereafter, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an electric roller blind according to an embodiment of the present invention,

2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV of FIG.

[Explanation of symbols]

10: Motor, 11: Motor case, 12: Output shaft, 13: Drive rotor, 14: Anti-vibration material, 15: Fixed part, 16: Holder, 1
7: Side holder, 18: Set screw, 19: Anti-vibration material, 20: Roll pipe, 21: Set bar, 22: Large diameter part, 23: Window, 2
4: Fan groove, 25: Pin, 26: Small diameter part, 27: End rotor, 28: Light reflection plate, 29: Claw, 30: Sensor, 31: Square hole

Claims (3)

[Claims] 1. A fixed holder (16), a motor (10) having a motor case (11) fixed to the holder, and an end portion rotatably supported by the holder with the motor case inside. A roll pipe for screen winding (20),
A drive rotor (13) fixed to the output shaft (12) of the motor and engaged with the inner peripheral surface of the roll pipe for rotationally driving the roll pipe, and an end rotor (27) of the roll pipe. ) Reflector fixed to the end face (28)
Is detected by the sensor (30) arranged in the holder,
An electric roll blind in which the rotation of the motor is controlled by a signal of the sensor, wherein the drive rotor is engaged with the roll pipe via a vibration isolator (14), and a fixing portion (15) of the motor case is provided. ) Is fixed to the holder via a vibration isolator (19). 2. A fixed holder (16), a motor (10) having a motor case (11) fixed to the holder, and an end portion rotatably supported by the holder with the motor case inside. A roll pipe for screen winding (20),
A drive rotor (13) fixed to the output shaft (12) of the motor and engaged with the inner peripheral surface of the roll pipe for rotationally driving the roll pipe, and an end rotor (27) of the roll pipe. ) Reflector fixed to the end face (28)
Is detected by the sensor (30) arranged in the holder,
An electric roller blind that controls the rotation of a motor according to a signal from the sensor, wherein the end rotor is rotatable with a large diameter portion (22) accommodating the sensor on the outer end side of the holder and an inner end side. A small diameter portion (26) for external fitting is formed, and a radially elastically deformable pawl (29) is integrally formed on the inner end portion of the small diameter portion, and the end rotor fitted over the small diameter portion is fitted to the large diameter portion. An electric roll blind characterized in that it is sandwiched between a diameter portion and the claw to regulate its axial position. 3. A drive rotor of the motor is engaged with the roll pipe via a vibration isolator (14), and a fixing portion (15) of the motor case is attached to the holder via a vibration isolator (19). It fixed, The electric roller blind of Claim 2 characterized by the above-mentioned.