JP6851119B2 - Blind operating device - Google Patents

Description

The present invention relates to a blind operating device.

As a conventional blind operation device, there is one disclosed in Japanese Patent Application Laid-Open No. 2008-88626 (Patent Document 1). The blind operating device disclosed in the same document raises and lowers an input shaft and a shielding material that transmit rotation in either the blind ascending rotation direction corresponding to the blind ascending direction and the blind descending rotation direction corresponding to the blind descending direction. It is provided with an output shaft connected to the elevating shaft for the operation. Then, with respect to the rotation of the input shaft in the blind ascending rotation direction, the third component provided between the input shaft and the planetary gear mechanism is made non-rotatable, and the rotation is decelerated from the first component to the second component. And to transmit the rotation of the input shaft to all the components of the planetary gear mechanism with respect to the rotation of the input shaft in the blind downward rotation direction, and transmit the rotation of the same speed as the input shaft to the output shaft. It is equipped with a clutch mechanism that switches to.

According to this, when the rotation in the upward rotation direction is transmitted from the operation unit to the input shaft, the rotation decelerated by the planetary gear mechanism is output to the output shaft to reduce the operation load, and a light operation feeling can be obtained. When the rotation in the downward rotation direction is transmitted from the operation unit to the input shaft, the planetary gear mechanism is invalidated and the rotation at the same speed as the input shaft is transmitted to the output shaft, delaying the downward speed of the shielding material. It has the effect that the shielding material can be lowered at a speed faster than that during the ascending operation.

Japanese Unexamined Patent Publication No. 2008-88626

However, in the conventional blind operation device, a planetary gear mechanism is interposed between the input shaft and the output shaft in order to reduce the operation load and change the operation speed, so that the head box is used as the operation device. There was a problem that the mounting space inside became large.

Therefore, the present invention has been made in view of such a problem, and an object of the present invention is to make a blind operating device capable of reducing an operating load and changing an operating speed into a compact size. The purpose is to provide an operating device.

In order to solve the above problems, according to the present invention, the drive unit for opening and closing the shielding material is provided with a pulley capable of transmitting a driving force, and the pulley has a winding portion around which an operation cord is wound. A blind operating device is provided in which the winding portion is expanded or contracted in diameter depending on the direction of rotation.

According to such a configuration, the diameter of the winding portion of the pulley can be increased or decreased depending on the rotation direction of the winding portion, that is, the operation direction of the operation cord, so that the rotation amount of the pulley can be operated with respect to the operation amount of the operation cord. It can be different depending on the direction, and it is possible to reduce the operating load and change the operating speed. Further, since it is possible to reduce the operating load and change the operating speed by changing the diameter of the winding portion, it is not necessary to interpose the planetary gear mechanism as in Patent Document 1, and the operating device can be compactly housed.

The present invention has various applications. The following application examples can be combined as appropriate.
For example, the winding portion may be divided into a plurality of parts in the circumferential direction, and the diameter may be expanded or reduced by moving each of the winding portions in the radial direction. With this configuration, the winding portion divided into a plurality of parts moves in the diameter increasing or contracting direction depending on the rotation direction of the winding portion, that is, the operation direction of the operation code, so that the operation amount changes according to the operation direction. I can handle it.

Further, a guide member for guiding the radial movement of the winding portion is provided, and when the winding portion rotates relative to the guide member, each winding portion moves in the radial direction by the action of the guide member. You may try to do it. By providing a guide member that can rotate relative to the winding portion and allowing the winding portion to move in the radial direction while rotating relative to the guide member, stable operation can be performed.

The winding portion and the guide member are provided with a guide groove on one side and a protrusion guided along the guide groove on the other side, and when the protrusion is guided along the guide groove, the winding portion is provided. The hooking portion and the guide member may be relatively rotatable, and when the protrusion is engaged with the guide groove, the winding portion and the guide member may be integrally rotatable. By providing a guide groove on one side and a protrusion guided along the guide groove on the other side between each winding portion and the guide member, it is possible to move each winding portion evenly in the radial direction. ..

A support member that rotates integrally with the winding portion and assists the movement of the winding portion in the radial direction may be provided. The support member can be stably operated by assisting the movement of the winding portion in the radial direction while rotating integrally with the winding portion.

A cord retainer that presses the operation cord against the outer peripheral surface of the winding portion may be provided. By providing the cord retainer, the operation cord is pressed against the winding portion, so that the operation force of the operation cord can be stably transmitted to the pulley.

According to the present invention, it is possible to make a blind operating device that can reduce the operating load and change the operating speed compact. Other effects of the present invention will also be described in embodiments for carrying out the invention described below.

It is a front view which shows the whole structure of the blind 100 of 1st Embodiment. It is a figure for demonstrating the structure of the operation device 160, (a) is the perspective view which shows the state which removed the support member 165 from the pulley 162, (b) is the state which attached the support member 165 to the pulley 162. It is a perspective view which shows. It is a figure for demonstrating the structure of the operation apparatus 160, (a) is the cross-sectional view which shows the state when the winding part 162a is reduced in diameter, and (b) is the figure when the diameter of the winding part 162a is expanded. It is sectional drawing which shows the state. It is a figure for demonstrating the operation of the operation device 160, (a) is the front view which shows the state of the diameter-reduced winding part 162a, and (b) is the front view which shows the state of the diameter-expanded winding part 162a. It is a figure. It is a figure for demonstrating the operation of the operation device 160, (a) is the front view which shows the state of the winding part 162a and the support member 165 when the diameter is reduced, and (b) is the winding when the diameter is expanded. It is a front view which shows the state of the hanging part 162a and the support member 165. It is a figure for demonstrating the operation apparatus 260 of 2nd Embodiment, (a) is the front view which shows the state which the diameter of the winding part 262a was reduced, and (b) is the front view which the diameter of the winding part 262a was expanded. It is a front view which shows the state. It is a figure for demonstrating the operation apparatus 360 of 3rd Embodiment, (a) is the front view which shows the state which the diameter of the winding part 362a was reduced, and (b) is the front view which the diameter of the winding part 362a was expanded. It is a front view which shows the state.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

(First Embodiment)
The first embodiment of the present invention will be described. First, the overall configuration of the blind 100 according to the present embodiment will be described with reference to FIG. FIG. 1 is a front view for explaining the overall configuration of the blind 100 according to the embodiment.

As shown in FIG. 1, the blind 100 of the present embodiment is aligned by a head box 110 fixed to a window frame, a ceiling, or the like (not shown), a ladder code 120 hanging from the head box 110, and a ladder code 120. A plurality of slats 130 supported in a state, an elevating cord 140 for raising and lowering a plurality of slat 130s, a bottom rail 150 connecting the lower end of the ladder cord 120 and the lower end of the elevating cord 140, and one end of the head box 110. It is configured to include an operation device 160 for operating the raising and lowering and rotation of the plurality of slats 130, and an operation code 170 for operating the operation device 160 by hanging from the operation device 160. Hereinafter, each component will be described in detail.

The head box 110 is fixed to the window frame, ceiling, or the like via the bracket 111 as described above. As shown in FIG. 1, the rotating shaft 112 is rotatably arranged in the head box 110 over almost the entire length in the longitudinal direction. One end of the rotating shaft 112 is connected to the operating device 160. The rotation of the rotation shaft 112 is operated via the operation device 160 by the operation of the operation code 170.

Further, in the head box 110, as shown in FIG. 1, winding drums 114 capable of winding and unwinding the ladder cord 120 and the elevating cord 140 are arranged at equal intervals in the longitudinal direction. The take-up drum 114 is rotatably supported by a drum receiver 116 fixed to the head box 110, and the take-up drum 114 penetrates the take-up drum 114 so that the rotating shaft 112 rotates integrally.

The ladder code 120 rotatably supports the slats 130. As shown in FIG. 1, the ladder code 120 supports a plurality of slats 130 in an aligned state. The upper end of the ladder cord 120 is connected to the take-up drum 114. The configuration of the ladder cord 120 and the take-up drum 114 is the same as that of a general blind. The lower end of the ladder cord 120 is connected to the bottom rail 150.

The slat 130 is a shielding material that shields or opens the opening. As shown in FIG. 1, the plurality of slats 130 are supported in an aligned state by the ladder code 120, and the rudder code 120 rotates by tilting.

The elevating cord 140 raises and lowers the slat 130. As shown in FIG. 1, the elevating cord 140 is connected to the take-up drum 114 so that the upper end can be taken up and unwound. The lower end of the elevating cord 140 is connected to the bottom rail 150 through the slat 130 or through the side portion of the slat 130. The elevating cord 140 moves up and down the slats 130 by winding or unwinding the elevating cord 140 by the rotation of the take-up drum 114 and raising and lowering the bottom rail 150.

The bottom rail 150 applies tension to the ladder cord 120 and the elevating cord 140. As shown in FIG. 1, the bottom rail 150 is provided below the lowermost slat 130, and the lower ends of the ladder cord 120 and the elevating cord 140 are connected to each other.

(Operating device 160)
The operation device 160, which is characteristic of the present embodiment, will be described. The operating device 160 operates the raising / lowering and rotation of the plurality of slats 130. As shown in FIG. 1, the operating device 160 is provided at one end of the head box 110, and is connected to one end of the rotating shaft 112 so as to be able to transmit a driving force.

The configuration of each part of the operating device 160 will be described with reference to FIGS. 2 and 3. 2A and 2B are views for explaining the configuration of the operating device 160, FIG. 2A is a perspective view showing a state in which the support member 165 is removed from the pulley 162, and FIG. 2B is a perspective view showing a state in which the support member 165 is attached to the pulley 162. It is a perspective view which shows the attached state. 3A and 3B are views for explaining the configuration of the operating device 160, FIG. 3A is a cross-sectional view showing a state when the winding portion 162a is reduced in diameter, and FIG. 3B is a cross-sectional view showing a state in which the winding portion 162a is expanded. It is sectional drawing which shows the state at the time of diameter.

As shown in FIG. 2, the operating device 160 includes a pulley 162 capable of transmitting a driving force to a driving unit 161 that drives the opening and closing of the slats 130, and the pulley 162 has a winding portion 162a around which the operation cord 170 is wound. The diameter of the winding portion 162a is increased or decreased depending on the rotation direction. Further, the operating device 160 integrally rotates with the guide member 163 that guides the radial movement of the winding portion 162a, the cord retainer 164 that presses the operation code 170 against the outer peripheral surface of the winding portion 162a, and the winding portion 162a. It also includes a support member 165 that assists the winding portion 162a in the radial direction, and a dropout prevention member 166 that prevents the pulley 162 and the support member 165 from falling off.

(Drive 161)
The drive unit 161 transmits the rotation to the rotation shaft 112. As shown in FIG. 2A, the drive unit 161 is arranged in the case 167, and includes a rotation transmission shaft 161a that transmits rotation to the rotation shaft 112 at the center. The rotation transmission shaft 161a projects in the direction of the pulley 162, and the pulley 162 is arranged on the outer periphery thereof. Further, the drive unit 161 includes a guide member 163, which will be described later, for guiding the movement of the winding unit 162a in the radial direction.

(Pulley 162)
The pulley 162 transmits the operation of the operation code 170 to the drive unit 161. As shown in FIG. 2A, the pulley 162 has a winding portion 162a around which the operation code 170 is wound. The pulley 162 is juxtaposed with the guide member 163 of the drive unit 161 and has a rotation transmission shaft 161a inserted in the center so as to be relatively rotatable. The pulley 162 is divided into three pieces 162-1, 162-2, and 162-3 in the circumferential direction. The winding portion 162a is expanded or reduced in diameter by moving the three pieces 162-1, 162-2, and 162-3 in the radial direction. When the pulley 162 rotates relative to the guide member 163, the action of the guide member 163 guides the movement of each winding portion 162a in the radial direction. The relative rotation of the pulley 162 with respect to the guide member 163 here includes rotation in which the axis is not coaxial.

Guide grooves 162b are formed on the sides of the three pieces 162-1, 162-2, and 162-3, respectively. As shown in FIG. 3A, the guide groove 162b has an arc shape, and the length R1 from the right end to the center of rotation is shorter than the length R2 from the left end to the center of rotation, and the guide groove 162b rotates. It is tilted with respect to the center. In the guide groove 162b, a protrusion 163a of a guide member 163, which will be described later, is arranged along the guide groove 162b.

As shown in FIG. 2A, a guide whose radial movement is assisted by the support member 165 on the surface of the three pieces 162-1, 162-2, 162-3 facing the support member 165. The protrusions 162c are provided so as to project in the axial direction.

(Guide member 163)
The guide member 163 guides the movement of the winding portion 162a in the radial direction. As shown in FIG. 2, the guide member 163 has a disk shape, and the rotation transmission shaft 161a penetrates the center and rotates integrally with the rotation transmission shaft 161a. As shown in FIG. 3, the guide member 163 is provided with three protrusions 163a projecting in the axial direction at equal intervals in the circumferential direction. The protrusions 163a are respectively arranged in the guide groove 162b of the pulley 162, and are movable over the entire length of the guide groove 162b. When the protrusion 163a is guided along the guide groove 162b, the winding portion 162a and the guide member 163 can rotate relative to each other, and when the protrusion 163a engages with the guide groove 162b, the winding portion 162a and the guide member 162a are guided. The member 163 can rotate integrally.

(Code holder 164)
The cord retainer 164 presses the operation cord 170 against the outer peripheral surface of the winding portion 162a so that the operating force of the operation cord 170 can be stably transmitted to the pulley 162. As shown in FIG. 2, the cord retainer 164 is provided at both upper corners of the case 167. The cord retainer 164 is formed in a fan shape, and the surface that presses the operation cord 170 is arcuate. The width of the cord retainer 164 is smaller than the width of the winding portion 162a and does not protrude from the winding portion 162a. Therefore, the cord retainer 164 does not interfere with the support member 165, which will be described later.

As shown in FIG. 3, in the cord retainer 164, the spring 164b is arranged in the spring accommodating portion 164a formed in a concave shape. The upper end of the spring 164b is in contact with the case 167, and the lower end of the spring 164b is in contact with the bottom surface of the spring accommodating portion 164a. The cord retainer 164 is pressed in the direction of the winding portion 162a by the elastic force of the spring 164b. As shown in FIG. 3A, the cord retainer 164 has a spring 164b that extends and protrudes when the winding portion 162a has a reduced diameter, and is wound as shown in FIG. 3B. When the diameter of the portion 162a is expanded, the spring 164b contracts and retracts. Therefore, the operation code 170 can be pressed against the winding portion 162a regardless of whether the diameter of the winding portion 162a is increased or decreased.

(Support member 165)
The support member 165 rotates integrally with the winding portion 162a and assists the winding portion 162a in the radial direction. As shown in FIG. 2A, the support member 165 has a donut shape and is provided with a radial guide groove 165a in which the guide protrusion 162c of the pulley 162 is arranged. The radial guide grooves 165a are provided at three locations at equal intervals in the circumferential direction, and extend linearly in the radial direction from the outer periphery to the center. Therefore, the guide protrusion 162c is guided by the radial guide groove 165a to move the winding portion 162a in the radial direction.

As shown in FIG. 2B, the support member 165 is arranged in parallel with the pulley 162 with the rotation transmission shaft 161a penetrating the center. The support member 165 has a guide protrusion 162c of the pulley 162 arranged in the radial guide groove 165a and rotates integrally with the pulley 162. A fall prevention member 166 is fitted to the rotation transmission shaft 161a that penetrates the support member 165 to prevent the support member 165 from separating from the pulley 162 and the support member 165 from falling off from the rotation transmission shaft 161a. ing.

The operation device 160, which is characteristic of the present embodiment, has been described above. The unexplained operation code 170 operates the operation device 160 to operate the raising / lowering and rotation of the slat 130. As shown in FIG. 1, the operation cord 170 is an endless cord, which is wound around the winding portion 162a of the pulley 162 to rotationally drive the pulley 162.

The configuration of the blind 100 of the present embodiment has been described above, and then the operation of the blind 100 will be described with reference to FIGS. 4 and 5. 4A and 4B are views for explaining the operation of the operating device 160, FIG. 4A is a front view showing a state of the reduced diameter winding portion 162a, and FIG. 4B is a front view showing the state of the reduced diameter winding portion 162a, and FIG. 4B is a front view showing the expanded diameter winding portion 162a. It is a front view which shows the state. 5A and 5B are views for explaining the operation of the operating device 160, FIG. 5A is a front view showing a state of the winding portion 162a and the support member 165 when the diameter is reduced, and FIG. 5B is a front view showing the state of the support member 165, and FIG. 5B is an enlarged diameter. It is a front view which shows the state of the winding part 162a and the support member 165 at the time of this.

(Descent of slats 130)
When lowering the slat 130, as shown in FIG. 4A, the lower operation code 170a is pulled out in the direction of arrow A in FIG. 4A. Then, the pulley 162 rotates in the direction of arrow B in FIG. 4A. At this time, when the protrusion 163a of the guide member 163 is not in contact with the end portion of the guide groove 162b of the pulley 162 in the counterclockwise direction, only the pulley 162 rotates, and the pulley 162 and the guide member 163 rotate relative to each other. .. Therefore, the protrusion 163a moves in the guide groove 162b, and the pieces 162-1, 162-2, 162-3 of the pulley 162 move in the radial direction so as to approach the rotation transmission shaft 161a. Further, the radial movement of each piece 162-1, 162-2, 162-3 is due to the movement of the guide protrusion 162c along the radial guide groove 165a as shown in FIG. 5A. , It is also supported by the support member 165.

As shown in FIG. 4A, when the protrusion 163a abuts on the counterclockwise end of the guide groove 162b, the winding portion 162a is in a reduced diameter state, and the pulley 162 and the guide member 163 are brought into contact with each other. It will rotate in one piece. When the diameter of the winding portion 162a is reduced, the spring 164b of the cord retainer 164 extends and protrudes, and the operation cord 170 is pressed against the winding portion 162a, so that the operating force of the operation cord 170 is transmitted to the winding portion 162a. ..

In this way, when the diameter of the winding portion 162a is reduced, the amount of rotation with respect to the amount of operation increases, so that the operation can be performed quickly. On the other hand, the operation load increases, but when lowering the slat 130, a small operation load is sufficient, so a small operation can be performed. The amount of rotation can be increased by the load, and the operation can be performed quickly.

(Rise of slats 130)
When raising the slat 130, as shown in FIG. 4 (b), the upper operation code 170b is pulled out in the direction of arrow C in FIG. 4 (b). Then, the pulley 162 rotates in the direction of arrow D in FIG. 4 (b) (rotation opposite to the direction B). At this time, only the pulley 162 rotates, and the pulley 162 and the guide member 163 rotate relative to each other. Therefore, the protrusion 163a moves in the guide groove 162b, and the pieces 162-1, 162-2, 162-3 of the pulley 162 move in the radial direction so as to be separated from the rotation transmission shaft 161a while rotating. Further, the radial movement of each piece 162-1, 162-2, 162-3 is due to the movement of the guide protrusion 162c along the radial guide groove 165a as shown in FIG. 5 (b). , It is also supported by the support member 165.

When the protrusion 163a comes into contact with the clockwise end of the guide groove 162b, the winding portion 162a is in a expanded state, and the pulley 162 and the guide member 163 rotate integrally. When the diameter of the winding portion 162a is increased, the spring 164b of the cord retainer 164 contracts and retracts, and the operation cord 170 is pressed against the winding portion 162a. Therefore, the operating force of the operating code 170 is transmitted to the winding portion 162a.

When the diameter of the winding portion 162a is increased in this way, the amount of rotation with respect to the amount of operation becomes small, so that the operation can be performed with a light force. When raising the slat 130, a large operating load is required, but since the winding portion 162a has an enlarged diameter, it can be operated with a light force.

(Effect of the first embodiment)
As described above, according to the present embodiment, the operating amount of the operation code 170 is increased by allowing the winding portion 162a of the pulley 162 to be expanded or contracted in diameter depending on the rotation direction, that is, the operation direction of the operation code 170. The amount of rotation of the pulley 162 with respect to the above can be made different depending on the operation direction, and it is possible to reduce the operation load and change the operation speed.

Further, since it is possible to reduce the operating load and change the operating speed by changing the diameter of the winding portion 162a, it is not necessary to interpose the planetary gear mechanism as in Patent Document 1, and the operating device 160 can be compactly housed. it can.

Further, the winding portion 162a divided into a plurality of parts moves in the diameter increasing or contracting direction according to the rotation direction of the winding portion 162a, that is, the operation direction of the operation code 170, so that the operation amount according to the operation direction is increased. Can respond to changes in.

Further, by providing a guide member 163 that can rotate relative to the winding portion 162a and allowing the winding portion 162a to move in the radial direction while rotating relative to the guide member 163, stable operation can be performed. ..

Further, by providing a guide groove 162b on one side and a protrusion 163a guided along the guide groove 162b on the other side between each winding portion 162a and the guide member 163, each winding portion 162a is uniformly provided in the radial direction. It becomes possible to move to.

Further, by providing a support member 165 that can rotate integrally with the winding portion 162a and assisting the movement in the radial direction while the winding portion 162a rotates integrally with the support member 165, stable operation can be performed. ..

Further, by providing the cord retainer 164, the operation cord 170 is pressed against the winding portion 162a, so that the operating force of the operation cord 170 can be stably transmitted to the pulley 162.

(Second embodiment)
The blind operating device 260 according to the second embodiment will be described with reference to FIG. 6A and 6B are views for explaining the operation device 260 of the present embodiment, FIG. 6A is a front view showing a state in which the winding portion 262a is reduced in diameter, and FIG. 6B is a front view showing a state in which the winding portion 262a is expanded. It is a front view which shows the diameter state. This embodiment is different from the first embodiment in that the cord presser 264 is different. In this embodiment, the points different from the first embodiment will be mainly described. The components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

Since the winding portion 262a and the operation code 270 of the present embodiment correspond to the winding portion 162a and the operation code 170 of the first embodiment, the description thereof will be omitted.

As shown in FIG. 6, the cord retainer 264 is a roller 264a that replaces the fan shape in the first embodiment. A spring 264b having the same function as the spring 164b of the first embodiment is provided at the end of the roller 264a. The roller 264a is pressed against the operation cord 270 by the elastic force of the spring 264b regardless of the diameter expansion or contraction of the winding portion 262a.

(Effect of the second embodiment)
As described above, according to the present embodiment, in addition to the effect of the first embodiment, the cord retainer 264 is a roller 264a, so that the friction applied to the operation code 270 when the operation code 270 is moved is reduced. be able to.

(Third Embodiment)
The blind operating device 360 according to the third embodiment will be described with reference to FIG. 7. 7A and 7B are views for explaining the operation device 360 of the present embodiment, FIG. 7A is a front view showing a state in which the winding portion 362a is reduced in diameter, and FIG. 7B is a front view showing a state in which the winding portion 362a is expanded. It is a front view which shows the diameter state. This embodiment is different from the first embodiment in the number in which the pulley 362 is divided. In this embodiment, the points different from the first embodiment will be mainly described. The components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

The pulley 362, the guide groove 362b, the guide member 363, the protrusion 363a, and the operation code 370 of the present embodiment correspond to the pulley 162, the guide groove 162b, the guide member 163, the protrusion 163a, and the operation code 170 of the first embodiment. Therefore, the description thereof will be omitted.

As shown in FIG. 7, the pulley 362 is formed by dividing the pulley 162 of the first embodiment into 6 parts, and 6 pieces 362-1, 362-2, 362-3, 362-4. , 362-5, 362-6. Since the pulley 362 is composed of six pieces, the distance between adjacent pieces is narrower than that of the three-divided pulley 162 of the first embodiment. Therefore, the shape of the wound portion 362a whose diameter has been expanded becomes closer to a circular shape.

Guide grooves 362b are provided in each of the pieces 362-1, 362-2, 362-3, 362-4, 362-5, and 362-6, respectively. Further, the guide member 363 is provided with six protrusions 363a according to the number of guide grooves 362b.

(Effect of the third embodiment)
As described above, according to the present embodiment, in addition to the effect of the first embodiment, the shape of the wound portion 362a whose diameter has been expanded approaches a circular shape, so that the pulley 362 can be smoothly rotated by the operation code 370. become.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

For example, in the above embodiment, the winding portion 162a (262a, 362a) is divided into a plurality of parts in the circumferential direction, and each winding portion 162a (262a, 362a) moves in the radial direction to increase or decrease the diameter. However, the present invention is not limited to this example.

Further, in the above embodiment, the winding portion 162a (262a, 362a) is configured to move in the radial direction by rotating relative to the guide member, but the present invention is not limited to this example. For example, the winding portion may move in the radial direction without rotating relative to the guide member, or may move in the radial direction without rotating.

Further, in the above embodiment, the winding portion 162a (262a, 362a) and the guide member 163 (363) are guided along the guide groove 162b (362b) on one side and the guide groove 162b (362b) on the other side. When the portion 163a (363a) is provided and the protrusion 163a (363a) is guided along the guide groove 162b (362b), the winding portion 162a (262a, 362a) and the guide member 163 (363) rotate relative to each other. It is possible, and when the protrusion 163a (363a) engages with the guide groove, the winding portion 162a (262a, 362a) and the guide member 163 (363) can be integrally rotated. , The present invention is not limited to this example, and can be appropriately configured.

Further, in the above embodiment, the operation cord 170 (270, 370) is provided with the cord retainer 164 (264) for pressing the operation cord 170 (270, 370) against the outer peripheral surface of the winding portion 162a (262a, 362a). It is not always necessary to provide a cord holder.

The above-described embodiment, application example, and modification can be implemented in any combination.

100 Blind 110 Headbox 112 Rotating shaft 114 Winding drum 116 Drum receiver 120 Ladder cord 130 Slat 140 Lifting cord 150 Bottom rail 160, 260, 360 Operating device 161 Drive unit 161a Rotation transmission shaft 162, 362 Pulley 162-1, 162 2, 162-3, 362-1, 362-2, 362-3, 362-4, 362-5, 362-6 Pieces 162a, 262a, 362a Winding parts 162b, 362b Guide groove 162c Guide protrusions 163, 363 Guide member 163a, 363a Protrusion part 164, 264 Cord retainer 164a Spring accommodating part 164b, 264b Spring 165 Support member 165a Radial guide groove 166 Falling prevention member 167 Case 170, 170a, 170b, 270, 370 Operation code 264a Roller

Claims (6)

Equipped with a pulley that can transmit the driving force to the drive unit that opens and closes the shielding material
The pulley has a winding portion around which the operation cord is wound.
A blind operating device, characterized in that the winding portion is expanded or contracted in diameter depending on the direction of rotation. The blind operating device according to claim 1, wherein the winding portion is divided into a plurality of parts in the circumferential direction, and the diameter of each winding portion is expanded or reduced by moving in the radial direction. A guide member for guiding the radial movement of the winding portion is provided.
The blind operating device according to claim 2, wherein when the winding portion rotates relative to the guide member, each winding portion moves in the radial direction by the action of the guide member. The winding portion and the guide member are provided with a guide groove on one side and a protrusion for guiding along the guide groove on the other side.
When the protrusion is guided along the guide groove, the winding portion and the guide member can rotate relative to each other.
The blind operating device according to claim 3, wherein when the protrusion is engaged with the guide groove, the winding portion and the guide member can rotate integrally. The blind operating device according to any one of claims 2 to 4, further comprising a support member that rotates integrally with the winding portion and assists the movement of the winding portion in the radial direction. The blind operation device according to any one of claims 1 to 5, further comprising a cord retainer that presses the operation code against the outer peripheral surface of the winding portion.

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