JP3252120B2 - Electric blinds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blind.

[0002]

2. Description of the Related Art Conventionally, as this kind of electric blind, there is one shown in FIG. In the figure, reference numeral 50 denotes a head box, which is a head box 50 of an electric blind.
Inside, a plurality of winding drums 54 capable of winding and unwinding a lifting cord 52 for raising and lowering the shield 51, a motor 56 for rotating the winding drum 54, and a motor 56
And a control circuit 57 for controlling the control. The motor 56 is disposed at an end of the head box 50, and rotation from the motor 56 is rotated by a rotation shaft 58 connected to an output shaft of the motor 56.
Is transmitted to the plurality of winding drums 54 via the.

FIG. 5 shows another conventional electric blind. A motor 62 is disposed near the center of the headbox 60 in the longitudinal direction, and rotation from the motor 62 is transmitted to a plurality of winding drums 64 via a gear 66 and a rotating shaft 68. The motor 62 is arranged parallel to the rotation shaft 68.

[0004]

However, in the conventional electric blind shown in FIG. 4, since the motor 56 is arranged at the end of the head box 50, the shielding 5
The distance in the width direction from the end portion 1 to the elevating cord 52, that is, the blade protrusion dimension cannot be made smaller than the length of the motor 56. About Figure 4
There is a problem that the structure cannot be used.

[0005] In the other conventional electric blind shown in FIG. 5, although the protruding dimension of the blade can be reduced, the motor 62 and the rotating shaft 68 are arranged in parallel, so that the There is a problem that the depth dimension becomes large. Further, since the gear 66 is required, there is a problem that the cost is increased. In addition to the conventional electric blinds described above, it is conceivable to arrange a double-axis motor near the center in the longitudinal direction of the head box and connect a plurality of winding drums to both shafts. Therefore, it is necessary to design it exclusively, which increases the cost. Further, since a large torque is required, there is a problem that the size is increased accordingly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the inventions according to the first to fourth aspects of the present invention can reduce the size of the blades without increasing the size of the head box and without increasing the cost. Its purpose is to provide blinds.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of elevating cords for elevating and lowering a shield are wound and unwound in a head box. A winding drum, a motor disposed inside the at least one winding drum and transmitting rotation to the winding drum, and a rotating shaft transmitting rotation from the motor to the winding drum where the motor is not disposed inside. , Are stored. In order to dispose the motor inside a certain take-up drum, the take-up drum and the motor can both be installed at the end of the head box, so that the blade projection size can be reduced. Since expensive parts such as gears are not required, the cost does not increase, and the headbox does not increase in size. According to a second aspect of the present invention, in the first aspect, a motor is further provided in the head box at a portion other than the portion where the winding drum disposed inside is disposed. The control means for controlling is stored.

According to a third aspect of the present invention, in the first or second aspect, the winding drum, in which the motor is disposed, has a built-in motor and is connected to an output shaft of the motor. A winding drum, which is fitted to the pipe so as to be rotatable integrally and has no motor disposed inside, is fitted so as to be rotatable integrally with a connecting body connected to the rotating shaft. According to a fourth aspect of the present invention, in one of the first to third aspects, one end of the drive pipe has a side end face closed and the drive pipe and the rotary shaft are closed. And a pipe cap for transmitting rotation from the drive pipe to the rotating shaft is provided, and the pipe cap is made of a vibration-proof material.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front perspective view showing an embodiment of an electric blind according to the present invention, and FIG. 2 is a perspective view thereof. In this embodiment, a horizontal blind has been described as an example. However, the present invention is not limited to this and can be similarly applied to a Roman shade, a pleated screen, and the like. In the figure, reference numeral 10 denotes an electric blind, and a plurality of slats 16 serving as shields are supported in an aligned state by a ladder cord 14 hanging from the head box 12 below the head box 12 fixed to a window frame or the like. I have. A bottom rail 18 is arranged at the lower end of the 16 rows of slats. This bottom rail 18 has a slat 1
One end of a lifting cord 20 for lifting and lowering 6 is connected, and the other end of the lifting cord 20 is inserted into the head box 12 through 16 rows of slats. A plurality of lifting cords 20 (four in the example in the figure) are provided at predetermined intervals in the width direction of the electric blind 10.

In the head box 12, a plurality of winding drums 22, 24 capable of winding and unwinding the plurality of lifting / lowering cords 20 are stored. The winding drum 22 has a polygonal through hole, and is rotatably fitted to a polygonal driving pipe 28 (see FIG. 2) having a motor 26 built therein. 2
6 are arranged. The motor 26 has a built-in deceleration mechanism. A fixed portion 26a of the motor 26 projects from one end 28a of the drive pipe 28 and is fixed to the head box 12, while a rotation output shaft 26b of the motor 26 is provided.
Is coupled to the inner peripheral surface of the drive pipe 28 by a coupling 30. Thus, the rotation of the motor 26 is transmitted to the winding drum 22 via the drive pipe 28.

As shown in FIG. 3, the other end 28b of the drive pipe 28 is provided with a pipe cap 40 for closing the side end face of the other end 28b and connecting the drive pipe 28 and the rotating shaft 34. The rotating shaft 34 is the intermediate bracket 3
2 and extends inside the head box 12 along its longitudinal direction. The other winding drum 24 in which the motor 26 is not disposed inside has a polygonal through hole, and is fitted to a polygonal connecting body 36 (see FIG. 2) connected to the rotating shaft 34 so as to be integrally rotatable. . Thus, the rotation of the motor 26 is transmitted to the winding drum 24 via the rotating shaft 34.

By making the driving pipe 28 and the connecting body 36 have the same outer peripheral polygonal shape, the winding drum 22 and the winding drum 24 can use exactly the same parts. By sharing the components in this way, the types of components can be reduced and the cost can be reduced. The upper ends of the ladder cords 14 are connected to the winding drums 22 and 24 via a clutch spring.
It can rotate only within a certain angle range in accordance with the rotation of. The winding drums 22 and 24 are fixed in the longitudinal direction position with respect to the head box 12 by a drum stand 25.

The pipe cap 40 is a vibration isolator made of an elastic material such as rubber, and is provided with vibration and noise generated by the motor 26 and a drive pipe generated by the eccentricity of the drive pipe 28 and the motor 26. 28 vibrations can be absorbed. Thus, vibration is not transmitted from the pipe cap 40 to other components, and only rotation of the drive pipe 28 is transmitted.

In the head box 12, a control circuit 42 for controlling the rotation of the motor 26, a limit switch 44, an encoder, and the like are provided at portions other than the portion where the winding drum 22 in which the motor 26 is disposed inside. Control means such as 46 are provided. For example, a control circuit 42 for driving the motor 26 is provided in a space between the adjacent winding drums 24 in parallel with the rotation shaft 34. The control circuit 42 and the motor 26 are connected by a cable routed inside the headbox 12.
A limit switch 44 is provided in a space between the winding drum 22 and the winding drum 24, and a sensor portion of the limit switch 44 protrudes from below the head box 12, and is connected to the raised slat 16. It can be contacted. Similarly, the winding drum 22
An encoder 46 for detecting the rotation angle of the rotating shaft 34 is provided in a space between the head and the winding drum 24, and the limit switch 44 and the encoder 46 are arranged in the control circuit 42 and the head box 12. Connected by the cable.

The electric blind 1 configured as described above
At 0, when a controller (not shown) is operated and a command signal output from the controller is sent to the control circuit 42, the control circuit 42 outputs a motor drive signal to the motor 26 in accordance with the command signal, and the motor 26 It drives and rotates its rotation output shaft 26b. The rotation of the rotation output shaft 26b is transmitted to the drive pipe 28 and the rotation shaft 3
4 to the connector 36. Then, the winding drum 22 and the winding drum 24 rotate in synchronization with each other,
The lifting cord 20 can be wound or unwound, and the slat 16 can be raised or lowered.

The rotation of the rotary shaft 34 is detected by an encoder 46, and a detection signal corresponding to the rotation angle is output from the encoder 46 to a control circuit 42. Since the rotation angle corresponds to the height of the slat 16, the control circuit 42 stops the motor 26 when determining that the current height of the slat 16 has reached the predetermined height from the rotation angle. When the sensor section of the limit switch 44 comes into contact with the slat 16, the control circuit 42 determines that the slat 16 has reached the maximum ascending position, and stops the motor 26.

In the electric blind 10, the motor 26
Is disposed inside the winding drum 22, the motor 26
The take-up drum 22 and the take-up drum 22 can be arranged at overlapping positions when viewed along the longitudinal direction of the head box 12. Therefore, the end portion 12a of the head box 12 and the winding drum 22
Can be freely set, and thus the blade protrusion dimension can be reduced without being restricted by the length of the motor 26. Further, since the motor 26 is provided by utilizing the internal space of the winding drum 22, it is not necessary to increase the size of the head box 12. Furthermore, motor 2
6 can use a versatile and inexpensive single-axis motor.

It is sufficient that the drive pipe 28 can accommodate at least a part of the motor 26, and it is not necessary to have a large length. Therefore, the vibration can be reduced as much as possible. The vibration of the drive pipe 28 is not transmitted to other parts. In the portion of the head box 12 where the drive pipe 28 is not provided, only the winding drum 24 that does not occupy a large space is provided.
Control means such as a control circuit 42, a limit switch 44, and an encoder 46 can be disposed in the space between the take-up drum 24 and the take-up drum 24 or in the space between the take-up drum 24 and the take-up drum 24. Can be used.

Further, since the motor 26 is disposed near the end 12a of the head box 12 and is built in the drive pipe 28 having substantially the same length as the motor 26, the maintenance thereof can be performed easily. . In the above embodiment, the motor 2 is provided inside the two winding drums 22.
Although the example in which 6 is arranged has been described, the present invention is not limited to this, and it is a matter of course that a motor may be arranged inside one or three or more winding drums.

[0020]

As described above, claims 1 to 4
According to the described invention, since the motor is arranged inside at least one winding drum, the position of one winding drum and the motor can be overlapped when viewed along the longitudinal direction of the head box. Therefore, since the motor and the winding drum can be arranged at the end of the head box, the blade projection size can be set small without increasing the size of the head box. According to the second aspect of the present invention, in the head box, a space is formed in a portion other than a portion in which the motor is disposed other than the winding drum disposed inside, so that control means such as a control circuit is provided. It can be located in the headbox, which is more space efficient.

According to the third aspect of the present invention, the rotation of the motor can be transmitted to the drive pipe to rotate the winding drum in which the motor is disposed. In addition, the rotation from the rotating shaft can be transmitted to the winding drum in which the motor is not arranged inside through the connecting body. Both the winding drum in which the motor is arranged inside and the winding drum in which the motor is not arranged inside are similarly structured to be fitted to the drive pipe or the coupling body, so that the parts of the winding drum can be shared. Thus, the number of types of parts can be reduced, and the cost can be reduced. According to the fourth aspect of the present invention, since the rotation is transmitted to the rotating shaft via the pipe cap made of the vibration isolator, the vibration of the drive pipe can be cut off. Further, the drive pipe only needs to be as long as the motor, and the vibration of the drive pipe itself does not increase so much. Therefore, the vibration can be reliably suppressed by the pipe cap.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an embodiment of an electric blind according to the present invention.

FIG. 2 is a perspective view of a head box of the electric blind of FIG. 1;

FIG. 3 is an enlarged sectional view of an end of a drive pipe.

FIG. 4 is a front view showing a conventional electric blind.

FIG. 5A is a plan view showing another conventional electric blind, and FIG. 5B is a front view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electric blind 12 Head box 16 Slat (shield) 20 Elevating cord 22 Winding drum 24 Winding drum 26 Motor 28 Drive pipe 34 Rotary shaft 36 Connecting body 40 Pipe cap 42 Control circuit (Control means) 44 Limit switch (Control means) ) 46 Encoder (control means)

Claims (4)

(57) [Claims] 1. A plurality of winding drums (22, 24) capable of winding and unwinding a lifting cord (20) for lifting and lowering a shield (16) in a head box (12).
A motor (26) disposed inside at least one winding drum (22) for transmitting rotation to the winding drum (22); and a motor (2) for rotating the motor (26).
An electric blind characterized in that a rotary shaft (34) for transmitting to a winding drum (24) that is not disposed inside is stored. 2. A head box (12) further comprising:
Winding drum (22) with motor (26) arranged inside
Motors (2
The electric blind according to claim 1, wherein a control means (42, 44, 46) for controlling the rotation of (6) is housed. 3. The take-up drum (22) having the motor (26) disposed inside has a drive pipe (28) having a built-in motor (26) and connected to an output shaft (26b) of the motor (26). ) Is rotatably fitted to the winding drum (24) in which the motor (26) is not disposed inside, and is rotatable integrally with the connecting body (36) connected to the rotating shaft (34). The electric blind according to claim 1, wherein the electric blind is fitted. 4. One end of the drive pipe (28)
A pipe cap (40) for closing a side end face of the drive pipe (28) and for transmitting rotation from the drive pipe (28) to the rotation shaft (34) between the drive pipe (28) and the rotation shaft (34). 4), wherein the pipe cap (40) is made of a vibration-proof material.