Window shades and their operating systems

Abstract

An actuation system for a window shade includes a control module operable to adjust a shading configuration of the window shade. The control module includes a wand having a hollow interior, a flexible operating element extending outside the wand at a first end of the wand, a handle coupled to the operating element and disposed at a second end of the wand, the handle operable to pull the operating element to actuate the control module, and an elongated anti-wrap guard. The operating element, handle, and anti-wrap guard are movable together relative to the wand. The anti-wrap guard is configured to extend outside the wand between the handle and the second end of the wand when the handle is moved away from the second end of the wand.

Description

Technical Field

[0001] The present invention relates to window shades and an operating system used for window shades.

[0002] This application claims the priority of U.S. Provisional Patent Application No. 63 / 325,896, filed on March 31, 2022. The disclosure content is incorporated herein by reference.

Background Art

[0003] Some window shades use an operating cord to raise the bottom of the window shade and a wand to lower the bottom. More specifically, the operating cord may be pulled to rotationally drive a rotating part, and this rotation is transmitted to a drive shaft, which can rotate to wind up a suspension cord connected to the bottom. When the user rotates the wand, an arrester connected to the wand can release the drive shaft, and accordingly, the drive shaft can rotate when the bottom descends under the action of gravity. When the operating cord is pulled to raise the bottom, a part of the length of the operating cord is exposed. Therefore, in order to prevent the cord from accidentally coiling around a child's neck and causing injury, the above-mentioned window shade may not meet the safety requirement of not exposing the cord.

Summary of the Invention

[0004] This application describes a window shade that can address the above problems and an operating system used for the window shade.

[0005] According to one embodiment, the operating system for a window shade comprises a control module adapted to be coupled to a transmission shaft, and the control module is operable to rotate the transmission shaft to adjust the shading structure of the window shade; the control module includes a wand having a hollow interior extending between a first end and a second end of the wand; a flexible operating element extending outward from the wand at the first end of the wand; a handle coupled to the operating element and located at the second end of the wand, which is operable to pull the operating element to actuate the control module; and an extendable anti-wrap guard; the operating element, the handle, and the anti-wrap guard are movable together with respect to the wand, and the anti-wrap guard is configured to extend outward from the wand between the handle and the second end of the wand when the handle moves away from the second end of the wand.

[0006] Furthermore, this application provides a window shade incorporating an operating system. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view showing an embodiment of a window shade having an operating system. [Figure 2] This is a perspective view showing a window shade with a bottom that descends from the headrail. [Figure 3] This is a schematic diagram illustrating the exemplary operation of a control module for an operating system that expands the light-blocking structure of a window shade. [Figure 4] This is a schematic diagram illustrating the exemplary operation of a control module for an operating system that expands the light-blocking structure of a window shade. [Figure 5] This is a schematic diagram illustrating the exemplary operation of a control module for an operating system that expands the light-blocking structure of a window shade. [Figure 6] This is a schematic diagram illustrating the exemplary operation of a control module for folding the light-blocking structure of a window shade. [Figure 7] This is a schematic diagram illustrating the exemplary operation of a control module for folding the light-blocking structure of a window shade. [Figure 8] This is an exploded view showing additional structural details of the control module. [Figure 9] This is a side view showing the handle of the control module in a first position adjacent to the wand of the control module. [Figure 10] This is a side view showing the handle in a second position, displaced from the wand. [Figure 11] This is a cross-sectional view showing an example of an anti-wrap guard fixedly connected to a handle, the anti-wrap guard including a tube fixedly connected to the handle, and the flexible operating element of the control module passing through the tube and anchored to the handle. [Figure 12] This is a cross-sectional view showing an example of an anti-wrap guard fixedly connected to a handle, the anti-wrap guard including a tube fixedly connected to the handle, and a flexible operating element passing through the tube and anchored to the anti-wrap guard. [Figure 13] This is a cross-sectional view showing an example of an anti-wrap guard fixedly connected to a handle, the anti-wrap guard including a solid rod fixedly connected to the handle, and a flexible operating element anchored to the anti-wrap guard. [Figure 14] This is a cross-sectional view showing an example of an anti-wrap guard, which includes a tube positioned away from the handle and attached to a flexible operating element, with the handle connected to the anti-wrap guard via a flexible link. [Figure 15] This is a cross-sectional view showing an example of an anti-wrap guard, which includes a solid rod positioned away from the handle and attached to a flexible operating element, with the handle connected to the anti-wrap guard via a flexible link. [Figure 16] This is a schematic diagram showing the various configurations of the anti-wrap guard when the handle is displaced to a position corresponding to the maximum extension of the flexible operating element. [Figure 17]This is a schematic diagram showing the various configurations of the anti-wrap guard when the handle is displaced to a position corresponding to the maximum extension of the flexible operating element. [Figure 18] This is a schematic diagram showing the various configurations of the anti-wrap guard when the handle is displaced to a position corresponding to the maximum extension of the flexible operating element. [Figure 19] This is a schematic diagram showing the structure of a modified version in which the wand does not have a sleeve. [Modes for carrying out the invention]

[0008] Figures 1 and 2 are two perspective views, each showing a different embodiment of the window shade 100. Referring to Figures 1 and 2, the window shade 100 may include a head rail 102, a bottom 104, a light-blocking structure 106, and an operating system 108.

[0009] The headrail 102 may be fixed to the top of the window frame and may have any desired shape. According to one example of the structure, the headrail 102 may have an elongated shape that includes a cavity for at least partially receiving the operating system 108 of the window shade 100.

[0010] The base 104 may be suspended from the headrail 102 with a plurality of suspension elements 110 (shown by dashed lines in Figure 2). According to one example of the structure, the base 104 may be an elongated rail having a channel adapted to receive the mounting of the light-shielding structure 106. Examples of suspension elements 110 may include, but are not limited to, cords, strips, bands, etc.

[0011] Furthermore, the light-shielding structure 106 may be suspended from the head rail 102. The light-shielding structure 106 may, exemplary, have a cellular structure, which may include a honeycomb structure. However, it should be understood that the light-shielding structure 106 may have any suitable structure that is expandable and foldable between the bottom portion 104 and the head rail 102. The light-shielding structure 106 may be positioned between the head rail 102 and the bottom portion 104 and may have two opposite ends attached to the head rail 102 and the bottom portion 104, respectively.

[0012] Referring to Figures 1 and 2, the bottom 104 is movable perpendicular to the headrail 102 to set the window shade 100 to a desired configuration. For example, the bottom 104 can be raised toward the headrail 102 to fold the shading structure 106, as shown in Figure 1, or lowered away from the headrail 102 to unfold the shading structure 106, as shown in Figure 2. The perpendicular position of the bottom 104 relative to the headrail 102 may be controlled by the actuation system 108.

[0013] Referring to Figures 1 and 2, the actuation system 108 is mounted on the head rail 102 and is operable to displace the bottom 104 relative to the head rail 102 for adjustment. The actuation system 108 may comprise a transmission shaft 112, a plurality of winding units 114 rotatably coupled to the transmission shaft 112, and a control module 116 coupled to the transmission shaft 112.

[0014] Referring to FIGS. 1 and 2, the transmission shaft 112 is disposed inside the head rail 102. Each of the transmission shafts 112 is coupled to a winding unit 114 and can rotate about the pivot axis P. Each of the winding units 114 is connected to the bottom 104 via at least one suspension element 110 and is operable to wind up the suspension element 110 to raise the bottom 104 and to unwind the suspension element 110 to lower the bottom 104. For example, the winding unit 114 may include a rotating drum (not shown) that is rotatably connected to the transmission shaft 112 and is connected to one end of the suspension element 110. The other end of the suspension element 110 can be connected to the bottom 104, whereby the rotating drum can rotate with the transmission shaft 112 to wind up or unwind the suspension element 110. Since the winding units 114 are commonly connected to the transmission shaft 112, the winding units 114 can operate simultaneously to wind up and unwind the suspension element 110.

[0015] The control module 116 is assembled to the head rail 102. The control module 116 is adapted to couple to the transmission shaft 112 and is operable to rotate the transmission shaft 112 about the pivot axis P to adjust the light shielding structure 106. More specifically, the control module 116 may include a wand 118 and a flexible operating element 120 (shown in phantom lines in FIGS. 1 and 2) and a handle 122 that are coupled to each other. The wand 118 and the handle 122 are operable independently of each other to adjust the light shielding structure 106.

[0016] The wand 118 may have an elongated shape extending along the longitudinal axis L of the wand 118 between two opposite ends 118A and 118B thereof, and may have a hollow interior extending between the two ends 118A and 118B. Examples of materials for manufacturing the wand 118 may include, but are not limited to, plastic materials. End 118A of wand 118 may be pivotally connected to head rail 102 via joint portion 126. Joint portion 126 may be configured to allow rotation of wand 118 about longitudinal axis L and tilting of wand 118 at different inclinations with respect to head rail 102. The wand 118 is rotatable about the longitudinal axis L to operate the control module 116.

[0017] The operating element 120 may include any flexible and linear component. Examples for making the operating element 120 may include, but are not limited to, cords, strips, cables, etc. The operating element 120 extends outside the wand 118 at end 118A and may have an end connected to the rotating drum 128 (shown in phantom lines in FIGS. 3 to 7) of the control module 116. The rotating drum 128 is rotatable to wind up and unwind the operating element 120. Further, the operating element 120 may be threaded through joint portion 126 and end 118A of wand 118 and may extend along the longitudinal axis L of the hollow interior of wand 118.

[0018] The handle 122 is positioned at the end 118B of the wand 118 and coupled to the operating element 120. The handle 122 may have any suitable shape that can be manually grasped by the user for operation. In the illustrated example, the handle 122 may have an opening 130 to facilitate the manual holding of the handle 122 during operation. However, it should be understood that the handle 122 is not limited to the illustrated example and may have other structures. The handle 122 is operable to activate the control module 116 by pulling the operating element 120, thereby facilitating the rotation of the rotating drum 128 in the unwinding direction. More specifically, the handle 122 is movable relative to the wand 118 between a first position in which the handle 122 is positioned adjacent to the end 118B of the wand 118 and a second position in which the handle 122 is displaced away from the end 118B of the wand 118. The handle 122 can be pulled away from the end 118B of the wand 118 to facilitate the rotation of the rotating drum 128, thereby activating the control module 116 to adjust the light-shielding structure 106.

[0019] Referring to Figures 1 and 2, the wand 118 may have a sleeve 132 fixedly connected thereto at its end 118B, the sleeve 132 having a larger cross-section than the wand 118. The handle 122 can lie adjacent to the sleeve 132 in a first position and can be at least partially received within the sleeve 132. The sleeve 132 facilitates the positioning of the handle 122 in the first position.

[0020] In relation to Figures 1 and 2, Figures 3 to 5 are schematic diagrams illustrating exemplary operation of a control module 116 for unfolding the light-shielding structure 106. Figures 6 and 7 are schematic diagrams illustrating exemplary operation of a control module 116 for folding the light-shielding structure 106. The control module 116 may be configured such that a handle 122 is operable to pull an operating element 120 to displace the light-shielding structure 106 vertically. More specifically, the control module 116 may be configured such that a handle 122 is operable to pull an operating element 120 to fold the light-shielding structure 106, and a wand 118 is rotatable around its longitudinal axis L to unfold the light-shielding structure 106.

[0021] Referring to Figures 3 to 5, the wand 118 can be rotated in a first direction R1 around the longitudinal axis L to lower the bottom 104 in order to expand the light-shielding structure 106. This angular displacement of the wand 118 can be performed while the handle 122 remains in a first position adjacent to the end 118B of the wand 118. Once the bottom 104 has reached the desired lowered position, the wand 118 can be rotated in a second direction R2 opposite to the first direction R1 around the longitudinal axis L to restore it to its initial position. This stops the bottom 104 in the desired position.

[0022] Referring to Figures 6 and 7, the base 104 can be raised by distance by displacing the handle 122 from the end 118B of the wand 118, thereby pulling the operating element 120 and causing the rotating drum 128 to rotate in a direction that at least partially unwinds the operating element 120. While the base 104 moves upward, the user may release the handle 122 at any time, for example, when the base 104 has reached the desired height or when the operating element 120 has completely unwinded from the rotating drum 128. When the handle 122 is released, the rotating drum 128 can rotate in the reverse direction that at least partially winds the operating element 120, thereby moving the handle 122 to its first position adjacent to the end 118B of the wand 118. While the handle 122 moves toward the end 118B of the wand 118, the base 104 remains in position relative to the head rail 102. The aforementioned sequence of pulling the handle 122 to release it may be repeated multiple times until the light-shielding structure 106 is completely folded.

[0023] The control module 116 may have any suitable structure for performing the operations described above. For example, the control module 116 may include one or more clutch elements (not shown) coupled to the rotating drum 128 and one or more damping springs (not shown) coupled to the wand 118. Rotation of the rotating drum 128 in the direction of unwinding the operating element 120 allows one or more clutch elements to couple the rotating drum 128 to the transmission shaft 112. This causes the transmission shaft 112 to rotate with the rotating drum 128 to raise the bottom 104. Rotation of the rotating drum 128 in the direction of winding the operating element 120 allows one or more clutch elements to discouple the rotating drum 128 from the transmission shaft 112. This causes the transmission shaft 112 to be locked by one or more damping springs to hold the bottom 104 in place. The angular displacement of the wand 118 shown in Figure 4 can facilitate one or more damping springs to release the transmission shaft 112, which can then rotate to allow gravity to lower the bottom 104. Various structures of the control module, including the aforementioned clutch elements and damping springs, are known from the prior art but are not shown herein for clarity.

[0024] In relation to Figure 6, Figure 8 is an exploded perspective view showing additional structural details of the control module 116. Referring to Figures 6 and 8, the control module 116 further includes an anti-wrap guard 134. The anti-wrap guard 134 has an elongated shape extending between its two opposite ends 134A, 134B and has rigidity that can prevent coiling of the anti-wrap guard 134. Examples of materials suitable for manufacturing the anti-wrap guard 134 may include, but are not limited to, plastic materials, metal materials, etc. In some examples of the structure, the rigidity of the anti-wrap guard 134 may be such that it can withstand a certain degree of bending without forming a loop, thereby providing an anti-wrap function. The anti-wrap guard 134 is coupled to the operating element 120 and the handle 122, and is configured to extend outward from the wand 118 between the handle 122 and the end 118B of the wand 118 when the handle 122 moves away from the end 118B of the wand 118. More specifically, the anti-wrap guard 134 is sized to be positionable inside the hollow interior of the wand 118 through its end 118B, and is coupled to the operating element 120 and the handle 122, so that the operating element 120, the handle 122, and the anti-wrap guard 134 can move together with respect to the wand 118. During operation, the anti-wrap guard 134 is thus movable in and out of the wand 118 through its end 118B.

[0025] Related to Figures 1 through 8, Figure 9 is a side view illustrating the handle 122 in a first position adjacent to the end 118B of the wand 118. Figure 10 is a side view illustrating the handle 122 in a second position displaced away from the end 118B of the wand 118. The second position of the handle 122 in Figure 10 can exemplify, for example, the maximum displacement of the handle 122 away from the end 118B of the wand 118. The anti-wrap guard 134 is sized such that when the handle 122 is in the second position corresponding to the maximum extension of the operating element 120 from the rotating drum 128, the anti-wrap guard 134 is exposed and can occupy a substantial (considerable) portion of the distance between the end 118B of the wand 118 and the handle 122, which may correspond to the maximum extension of the operating element 120 from the rotating drum 128. According to one example of the structure, while the handle 122 is in the second position, the anti-wrap guard 134 may occupy at least half of the distance between the end 118B of the wand 118 and the handle 122. According to one example of the structure, while the handle 122 is in the second position, the anti-wrap guard 134 may occupy at least two-thirds of the distance between the end 118B of the wand 118 and the handle 122. According to one example of the structure, while the handle 122 is in the second position, the anti-wrap guard 134 may occupy at least three-quarters of the distance between the end 118B of the wand 118 and the handle 122. According to one example of the structure, while the handle 122 is in the second position, the anti-wrap guard 134 may occupy the entire distance between the end 118B of the wand 118 and the handle 122. Thus, when the handle 122 is in the second position, the anti-wrap guard 134 can be configured to be substantially or entirely exposed to the outside of the wand 118.

[0026] When the control module 116 is activated by displacing the handle 122 away from the end 118B of the wand 118, the extension of the anti-wrap guard 134 on the outside of the wand 118 can prevent substantial (considerably large) exposure of the operating element 120 between the end 118B of the wand 118 and the handle 122. As a result, injuries caused by the operating element 120 accidentally coiling around a child's neck can be prevented. Due to its anti-wrap characteristics, the exposed anti-wrap guard 134 cannot wrap around a child's neck and therefore poses no risk of harm.

[0027] When the handle 122 is in a first position adjacent to the end 118B of the wand 118, the anti-wrap guard 134 can be received substantially or entirely within the hollow interior of the wand 118. Thus, a compact arrangement is obtained. While the anti-wrap guard 134 is retracted into the wand 118, the wand 118 is rotatable around its longitudinal axis L to lower its base 104.

[0028] The operating element 120, the handle 122, and the anti-wrap guard 134 may be connected to each other by various structures. For example, the anti-wrap guard 134 may be fixedly connected to the handle 122, or it may be positioned separately from the handle 122 and attached to the operating element 120.

[0029] In relation to Figures 8 to 10, Figures 11 to 13 are cross-sectional views showing several examples in which the anti-wrap guard 134 is fixedly connected to the handle 122. Referring to Figures 11 to 13, the anti-wrap guard 134 may be fixedly connected to the handle 122. The operating element 120 may have an end 136 that is anchored to the handle 122 or the anti-wrap guard 134.

[0030] In the example shown in Figure 11, the anti-wrap guard 134 includes a tube 138 that is fixedly connected to the handle 122, the operating element 120 passes through the hollow interior of the tube 138, and the end 136 of the operating element 120 is anchored to the handle 122. The tube 138 may be provided as another part with one end fastened to the handle 122, or it may be formed integrally with the handle 122. The end 136 of the operating element 120 may be fixedly connected to the handle 122 by any suitable technique. For example, the end 136 of the operating element 120 may engage with a retaining structure provided on the handle 122.

[0031] In the example shown in Figure 12, the tube 138 is similarly fixedly connected to the handle 122 at one end, and the end 136 of the operating element 120 is anchored to the tube 138. For example, the end 136 of the operating element 120 may engage with a retaining structure provided at the end of the tube 138 opposite to the handle 122.

[0032] In the example shown in Figure 13, the anti-wrap guard 134 includes a solid rod 140 that does not have a hollow interior. The rod 140 is fixedly connected to the handle 122, and the operating element 120 is anchored to the rod 140. The rod 140 may be provided as another part with one end fastened to the handle 122, or it may be formed integrally with the handle 122. A suitable technique for anchoring the operating element 120 to the handle 122 may include, but is not limited to, bonding, tying, or fastening the end of the operating element 120 to the rod 140.

[0033] Figures 14 and 15 are cross-sectional views showing some examples, in which the anti-wrap guard 134 is positioned away from the handle 122 and attached to the operating element 120, and the handle 122 is connected to the anti-wrap guard 134 via a flexible link 142.

[0034] In the example in Figure 14, the anti-wrap guard 134 includes a tube 144 having two opposite ends 144A and 144B. The flexible link 142 may include, but is not limited to, a cord, cable, strip, etc. The operating element 120 may be anchored to the anti-wrap guard 134, and the flexible link 142 may be anchored to the handle 122 and the anti-wrap guard 134. For example, the operating element 120 may be anchored to end 144A of the tube 144, and the flexible link 142 may have two opposite ends 142A and 142B anchored to the handle 122 and end 144B of the tube 144, respectively.

[0035] In the example shown in Figure 15, the anti-wrap guard 134 includes a solid rod 146 having two opposite ends 146A and 146B. The operating element 120 may be anchored to end 146A of the rod 146, and the flexible link 142 may be anchored to the handle 122 and end 146B of the rod 146, respectively.

[0036] In relation to Figures 6 and 10 to 15, Figures 16 to 18 are schematic diagrams showing various configurations of the anti-wrap guard 134 when the handle 122 is displaced from the rotating drum 128 to a second position corresponding to the maximum extension of the operating element 120.

[0037] Referring to Figure 10, the anti-wrap guard 134 may be fixedly connected to the handle 122 and may occupy the entire distance between the end 118B of the wand 118 and the handle 122.

[0038] Referring to Figure 16, the anti-wrap guard 134 is fixedly connected to the handle 122 and occupies a substantial portion of the distance between the end 118B of the wand 118 and the handle 122. The operating element 120 may be slightly exposed between the end 118B of the wand 118 and the anti-wrap guard 134.

[0039] Referring to Figure 17, the anti-wrap guard 134 is positioned away from the handle 122 and attached to the operating element 120. The operating element 120 is slightly exposed between the end 118B of the wand 118 and the anti-wrap guard 134, and the flexible link 142 is exposed between the handle 122 and the anti-wrap guard 134.

[0040] Referring to Figure 18, the anti-wrap guard 134 is positioned away from the handle 122 and attached to the operating element 120. The anti-wrap guard 134 has a portion that remains inside the wand 118, and the flexible link 142 is exposed between the handle 122 and the anti-wrap guard 134.

[0041] Figure 19 is a schematic diagram showing a modified example in which the wand 118 does not have a sleeve 132 (shown in Figures 9 and 10) at its end 118B. The anti-wrap guard 134 is fixedly connected to the handle 122. As the handle 122 moves toward and away from the end 118B of the wand 118, the anti-wrap guard 134 is movable to retract into the wand 118 and extend out of the wand 118.

[0042] The advantages of the structures described herein include the ability to provide a window shade having an operable actuation system that allows the bottom of the window shade to be lowered and raised in a convenient manner, thereby effectively preventing injuries caused by the flexible actuation element accidentally coiling around a child's neck.

[0043] The realization of the structure is described only in the context of specific embodiments. These embodiments are illustrative and not limiting. Many variations, modifications, additions, and improvements are possible. Accordingly, multiple examples may be given for components described as a single example herein. In the exemplary configurations, structures and functions presented as individual components may be implemented as a combined structure or component. These and other variations, modifications, additions, and improvements may be included in the following claims.

Claims

1. An operating system for window shades, A control module adapted to be coupled to a transmission shaft, comprising a control module that is operable to rotate the transmission shaft in order to adjust the shading structure of a window shade, The control module is A wand having a hollow interior extending between its first and second ends, A flexible operating element extending outward from the wand at the first end of the wand, A handle coupled to the operating element and located at the second end of the wand, the handle being operable to pull the operating element in order to activate the control module, Includes an elongated anti-wrap guard, The operating element, the handle, and the anti-wrap guard are movable together with respect to the wand, and the anti-wrap guard is configured to extend outward from the wand between the handle and the second end of the wand when the handle moves away from the second end of the wand. An operating system in which the anti-wrap guard is positioned away from the handle and attached to the operating element, and the handle is connected to the anti-wrap guard via a flexible link.

2. An operating system for a window shade, A control module adapted to be coupled to a transmission shaft, comprising a control module that is operable to rotate the transmission shaft in order to adjust the shading structure of a window shade, The control module is A wand having a hollow interior extending between its first and second ends, A flexible operating element extending outward from the wand at the first end of the wand, A handle coupled to the operating element and located at the second end of the wand, the handle being operable to pull the operating element in order to activate the control module, Includes an elongated anti-wrap guard, The operating element, the handle, and the anti-wrap guard are movable together with respect to the wand, and the anti-wrap guard is configured to extend outward from the wand between the handle and the second end of the wand when the handle moves away from the second end of the wand. The anti-wrap guard is a solid rod, and the solid rod does not have a hollow interior and is integrally formed with the handle, in the operating system.

3. An operating system for a window shade, A control module adapted to be coupled to a transmission shaft, comprising a control module that is operable to rotate the transmission shaft in order to adjust the shading structure of a window shade, The control module is A wand having a hollow interior extending between its first and second ends, A flexible operating element extending outward from the wand at the first end of the wand, A handle coupled to the operating element and located at the second end of the wand, the handle being operable to pull the operating element in order to activate the control module, Includes an elongated anti-wrap guard, The operating element, the handle, and the anti-wrap guard are movable together with respect to the wand, and the anti-wrap guard is configured to extend outward from the wand between the handle and the second end of the wand when the handle moves away from the second end of the wand. An actuation system wherein the anti-wrap guard is a tube, the tube is provided as another part fastened to the handle, the tube has an end, the end extends into the handle and is fixedly connected to the handle, and the operating element passes through the hollow interior of the tube and has an end anchored to the handle, the end of the operating element engages with a retaining structure provided inside the handle.

4. The actuation system according to claim 1, wherein the anti-wrap guard includes a tube having a hollow interior or a solid rod not having a hollow interior.

5. The actuation system according to claim 1, wherein the anti-wrap guard includes a tube, and the operating element is made to pass through the hollow interior of the tube.

6. The anti-wrap guard is sized to be positionable within the hollow interior of the wand. The operating system according to any one of claims 1 to 5, wherein the anti-wrap guard is movable so as to move in and out of the wand through the second end.

7. The handle is movable between a first position adjacent to the second end of the wand and a second position away from the second end of the wand. The operating system according to any one of claims 1 to 5, wherein when the handle is in the second position, the anti-wrap guard is exposed and occupies the distance between the second end of the wand and the handle.

8. When the handle is in the second position, the anti-wrap guard is partially or entirely exposed to the outside of the wand. The actuation system according to claim 7, wherein exposure of the operating element between the second end of the wand and the handle, which could cause the operating element to coil when the handle moves away from the second end of the wand, is prevented by the extension of the anti-winding guard between the second end of the wand and the handle.

9. The operating system according to claim 7, wherein when the handle is in the second position, the anti-wrap guard occupies at least half, or at least two-thirds, of the distance between the second end of the wand and the handle.

10. The operating system according to claim 7, wherein when the handle is in the first position, the anti-wrap guard is partially or entirely received inside the hollow interior of the wand.

11. The operating system according to claim 7, wherein the wand is fixedly connected to a sleeve at the second end, the sleeve has a cross-section larger than the cross-section of the wand, and the handle lies adjacent to the sleeve in the first position.

12. The actuation system according to claim 7, wherein the second position corresponds to the maximum displacement of the handle when displaced away from the second end of the wand.

13. The operating system according to any one of claims 1 to 5, wherein the handle is operable to pull the operating element in order to vertically displace the light-blocking structure of the window shade.

14. The operating system according to claim 13, wherein the handle is operable to pull the operating element in order to fold the light-blocking structure of the window shade, and the wand is rotatable about the longitudinal axis of the wand in order to unfold the light-blocking structure of the window shade.

15. A head rail having a transmission shaft, The light-shielding structure and bottom are suspended from the headrail, The operating system comprises the operating system described in any one of claims 1 to 5, The control module is mounted on the headrail, and the wand is pivotally connected to the headrail. Window shades.

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