Curtain and actuation system thereof

Abstract

An actuation system includes a transmission shaft pivotable about a longitudinal axis thereof, a detent spring having an engaged state adapted to prevent pivoting of the transmission shaft and a released state adapted to allow pivoting of the transmission shaft, a detent actuation mechanism coupled to the detent spring and including a toggle actuator operable between a first position and a second position to cause the detent spring to transition between the engaged state and the released state, wherein the first position of the toggle actuator corresponds to the engaged state of the detent spring and the second position of the toggle actuator corresponds to the released state of the detent spring, and a stop mechanism coupled to the detent actuation mechanism, the stop mechanism being transitionable between a first biased state and a second biased state, wherein the stop mechanism applies a first biasing force when in the first biased state to assist the toggle actuator in maintaining the first position and the stop mechanism applies a second biasing force when in the second biased state to assist the toggle actuator in maintaining the second position.

Description

Technical Field

[0001] This invention relates to curtains and their actuation systems. Background Technology

[0002] Some curtains on the market use a control cord to raise the bottom of the curtain and a rod to lower it. More specifically, the control cord can be pulled to drive a rotating component to pivot, and the rotation of the rotating component is transmitted to a drive shaft, causing the drive shaft to pivot and wind up the hanging cord connected to the bottom. When the user rotates the rod, it causes the brake coupled to the rod to release the drive shaft, causing the drive shaft to pivot, and the bottom can move downwards due to gravity.

[0003] In the aforementioned types of curtains, when the rotating component and drive shaft rotate to pull up the bottom, the braking force of the braking component may create resistance on the drive shaft. Therefore, the user must overcome the braking force to pull up the bottom, making the operation more strenuous. Summary of the Invention

[0004] One object of the present invention is to provide a curtain and an actuation system suitable for the curtain, which can reduce internal friction and make the actuation system easy to operate with less force.

[0005] According to one embodiment, the actuation system includes: a drive shaft pivotable about its longitudinal axis; a brake spring having an engaged state adapted to prevent pivoting of the drive shaft and an disengaged state allowing pivoting of the drive shaft; a brake actuation mechanism coupled to the brake spring and including a switching actuator operable between a first position and a second position to cause the brake spring to switch between an engaged state and a disengaged state, wherein the first position of the switching actuator corresponds to the engaged state of the brake spring, and the second position of the switching actuator corresponds to the disengaged state of the brake spring; and a stop mechanism coupled to the brake actuation mechanism, the stop mechanism being operable between a first bias state and a second bias state, wherein when the stop mechanism is in the first bias state, a first bias force is applied to assist the switching actuator in maintaining the first position, and when the stop mechanism is in the second bias state, a second bias force is applied to assist the switching actuator in maintaining the second position.

[0006] According to one embodiment, the stop mechanism includes a spring configured to be loaded as the switching actuator moves between a first position and a second position, and to apply a first bias force when the switching actuator is in the first position and a second bias force when the switching actuator is in the second position.

[0007] According to one embodiment, the brake actuation mechanism includes a spring coupling member connected to one end of the brake spring, the spring coupling member being pivotable about the longitudinal axis to cause the brake spring to switch between an engaged state and a disengaged state.

[0008] According to one embodiment, the brake actuation mechanism further includes a plurality of transmission components, and the switching actuator is connected to the spring coupling component through the plurality of transmission components.

[0009] According to one embodiment, the plurality of transmission elements are configured to convert the pivoting action of the switching actuator into the pivoting action of the spring coupling element.

[0010] According to one embodiment, the plurality of transmission elements are configured to convert the sliding action of the switching actuator into the pivoting action of the spring coupling element.

[0011] According to one embodiment, the plurality of transmission elements includes a first transmission element that engages with the spring coupling element.

[0012] According to one embodiment, each of the first biasing force and the second biasing force is an off-axis force applied to the first transmission member.

[0013] According to one embodiment, the first transmission member has an eccentric portion, and the stop mechanism applies a first biasing force or a second biasing force to the eccentric portion of the first transmission member.

[0014] According to one embodiment, the stopping mechanism includes a pivot, a connecting member, and a spring. The connecting member is slidably connected to the pivot and pivotally connected to the eccentric portion of the first transmission member, while the spring is connected to the pivot and the connecting member.

[0015] According to one embodiment, the connecting member is configured to slide radially relative to the pivot axis of the pivot member.

[0016] According to one embodiment, the first transmission member is pivotable about a first pivot axis, the pivoting member is pivotable about a second pivot axis, and the connecting member is pivotally connected to the eccentric portion of the first transmission member by a third pivot axis. The movement of the switching actuator between a first position and a second position causes the third pivot axis to pass through the junction line between the first pivot axis and the second pivot axis.

[0017] According to one embodiment, the plurality of transmission components further includes a second transmission component, and the first transmission component has a first gear portion and a second gear portion, wherein the first gear portion of the first transmission component meshes with the second transmission component, and the second gear portion of the first transmission component meshes with the spring coupling component.

[0018] According to one embodiment, the switching actuator includes a bar.

[0019] According to one embodiment, the actuation system further includes a brake engagement member, wherein the brake spring is in frictional contact with the brake engagement member in the engaged state and is released from frictional contact with the brake engagement member in the disengaged state.

[0020] According to one embodiment, the actuation system further includes: a shaft coupling pivotally coupled to the drive shaft; a lifting actuation module including a connected drum and an operating member, the drum being pivotable in a winding direction for winding the operating member and in an extension direction for extending the operating member; and a clutch mechanism configured to selectively couple the shaft coupling to one of the drum and the brake engagement member, wherein: when the shaft coupling is decoupled from the brake engagement member and coupled to the drum, the drum and the shaft coupling are pivotable synchronously relative to the brake engagement member; when the shaft coupling is coupled to the brake engagement member and decoupled from the drum, the engagement state of the brake spring is adapted to prevent the drive shaft from pivoting.

[0021] According to one embodiment, the actuating element extends through the hollow interior of the switching actuator.

[0022] In addition, the present invention also provides a curtain, comprising: a top rail, a movable rail, and a shielding structure disposed between the top rail and the movable rail; a winding unit mounted on the top rail, the winding unit being connected to the movable rail via a suspension member; and the aforementioned actuation system, wherein the drive shaft is pivotally coupled to the winding unit, and the drive shaft is pivotable to pull up and lower the movable rail. Attached Figure Description

[0023] Figure 1 A perspective view of a curtain provided according to an embodiment of the present invention is shown.

[0024] Figure 2 Draw Figure 1 A 3D diagram showing the movable track in the curtains moving down from the top track.

[0025] Figure 3 An exploded view of the control module in the actuation system for curtains is shown.

[0026] Figure 4 Draw Figure 3 A cross-sectional view of the control module.

[0027] Figure 5 An exploded view of the clutch mechanism in the control module is shown.

[0028] Figure 6 and Figure 7 A partial cross-sectional view illustrating an exemplary sliding contact between a clutch element in a clutch mechanism and the drum of a lifting actuation module.

[0029] Figure 8 Draw Figure 3 The control module includes a schematic diagram showing the connection between the brake spring and the spring coupler, and a transmission assembly that connects the switching actuator to the spring coupler.

[0030] Figure 9 An enlarged 3D view showing the stop mechanism in the control module in the first bias state.

[0031] Figure 10 A schematic diagram showing the stop mechanism in the first bias state is drawn.

[0032] Figure 11 An enlarged 3D view of the stop mechanism in the second bias state is shown.

[0033] Figure 12 A schematic diagram showing the stop mechanism in the second bias state is drawn.

[0034] Figure 13 and Figure 14 The drawing is shown as an unfolding. Figure 1 A diagram illustrating the operation of the curtains.

[0035] Figure 15 and Figure 16 The drawing is shown as a pull-up. Figure 1 A diagram illustrating the operation of the movable track for the curtains.

[0036] Figure 17 An exploded view of a control module provided in an actuation system for curtains according to another embodiment is shown.

[0037] Figure 18 Draw Figure 17 An enlarged view of some structural details of the transmission components in the control module.

[0038] Figure 19 and Figure 20 The illustration is shown as an unfolding feature. Figure 17 The diagram shows the operation of the curtain control module.

[0039] List of reference numerals

[0040] 100: Curtains

[0041] 102: Top Rail

[0042] 104: Movable rail

[0043] 106: Shielding Structure

[0044] 110: Suspension components

[0045] 200: Actuation System

[0046] 202: Drive shaft

[0047] 204: Winding unit

[0048] 206: Control Module

[0049] 208: Vertical axis

[0050] 210: Outer shell

[0051] 210A: Inner cavity

[0052] 212A, 212B: Shell

[0053] 212C: Cover

[0054] 212D: Support

[0055] 214: Shaft mating parts

[0056] 216: Brake Spring

[0057] 216A, 216B: End caps

[0058] 218: Brake coupling

[0059] 220: Lifting Actuation Module

[0060] 222: Clutch mechanism

[0061] 224: Fixed shaft

[0062] 226: Bump

[0063] 228: Shaft

[0064] 230: Through hole

[0065] 232: Hollow interior

[0066] 234: Outer surface

[0067] 236: Roll

[0068] 238: Operating components

[0069] 240: Spring

[0070] 242: Inner cavity

[0071] 244, 246: Clutch components

[0072] 248: Middle section

[0073] 250: End

[0074] 252: Gap

[0075] 254: Inner wall

[0076] 256: Protrusion

[0077] 258: Incline

[0078] 260A, 260B: Stopping surface

[0079] 262: Incline

[0080] 264A, 264B: Stopping surfaces

[0081] 266, 268, 276, 278: Convex teeth

[0082] 270: Incline

[0083] 270A: Groove

[0084] 272: Protrusion

[0085] 274: Torsion Spring

[0086] 287: Guiding components

[0087] 302: Brake Actuation Mechanism

[0088] 306: Switching Actuators

[0089] 308: Spring Coupler

[0090] 310, 310': Transmission assembly

[0091] 312: Handle

[0092] 314, 316, 342: Transmission components

[0093] 308A, 314A, 314B, 316A: Gear section

[0094] 314R, 316R, 326R, 328R, 342R: Pivot axis

[0095] 320: Stopping mechanism

[0096] 322: Spring

[0097] 324: Eccentric part

[0098] 326: Pivot

[0099] 328: Connector

[0100] 340: Slider

[0101] 344: Teeth

[0102] F1: First bias force

[0103] F2: Second bias force

[0104] Y: Major axis

[0105] L: Joint line

[0106] R1, R2, D1, D2, X1, X2, V1, V2: Direction. Detailed Implementation

[0107] Figure 1 and Figure 2 The illustration shows perspective views of the curtain 100 provided in an embodiment of the present invention in different states. (See attached image.) Figure 1 and Figure 2 The curtain 100 may include a top track 102, a movable track 104, a shading structure 106, and an actuation system 200. Figure 1 To indicate whether the curtain 100 is folded or raised, Figure 2 This indicates whether the curtain 100 is open or closed.

[0108] The top rail 102 can be fixed to the top of the window and can be of any shape. According to one embodiment, the top rail 102 can have an elongated shape, wherein it has a cavity for accommodating at least part of the actuation system 200.

[0109] The movable rail 104 can be suspended by multiple suspension components 110 ( Figure 2 (Drawn in dashed lines) Suspended from the top rail 102. According to one embodiment, the movable rail 104 is an elongated track with a channel for securing the curtain structure 106. The suspension element 110 includes, but is not limited to, ropes, strips, ribbons, etc. In one embodiment, the movable rail 104 is the bottom rail of the curtain 100. However, it should be understood that other curtain elements may be provided below the movable rail 104 as needed.

[0110] The shielding structure 106 is disposed between the top rail 102 and the movable rail 104, and can be any suitable structure that can extend and overlap between the top rail 102 and the movable rail 104. According to one example, the shielding structure 106 is, for example, a cell-like structure, which may include, but is not limited to, a honeycomb structure. In use, the shielding structure 106 can be suspended from the top rail 102, and can be unfolded or overlapped by the displacement of the movable rail 104 away from or towards the top rail 102.

[0111] See Figure 1 and Figure 2 The movable track 104 can move vertically relative to the top track 102 to adjust the curtain 100 to a desired state. For example, the movable track 104 can move upward toward the top track 102 to overlap the blinding structure 106 (e.g., Figure 1 (as shown), or move downwards away from the top rail 102 to deploy the shielding structure 106 (as shown). Figure 2(As shown). The vertical position of the movable rail 104 relative to the top rail 102 can be controlled by the operation of the actuation system 200.

[0112] See Figure 1 and Figure 2 The actuation system 200 is connected to the top rail 102 and can be operated to move the movable rail 104 relative to the top rail 102 for adjustment. The actuation system 200 may include a drive shaft 202, a plurality of winding units 204 pivotally coupled to the drive shaft 202, and a control module 206 coupled to the drive shaft 202.

[0113] Drive shaft 202 and winding unit 204 may be mounted in top rail 102. Drive shaft 202 is coupled to winding unit 204 and is pivotable about longitudinal axis 208 of drive shaft 202. Each winding unit 204 is connected to movable rail 104 via at least one suspension member 110, and can be operated to retract suspension member 110 to pull up movable rail 104 or extend suspension member 110 to lower movable rail 104. For example, winding unit 204 may include a drum (not shown) pivotally coupled to drive shaft 202 and connected to one end of suspension member 110, the other end of suspension member 110 being connected to movable rail 104, whereby the drum can pivot synchronously with drive shaft 202 to retract suspension member 110 or extend suspension member 110. Since all winding units 204 are coupled to the drive shaft 202, the winding units 204 can operate synchronously to wind up the suspension member 110 or extend the suspension member 110.

[0114] The control module 206 is coupled to the drive shaft 202 and can be operated to drive the drive shaft 202 to pivot in any direction about the longitudinal axis 208, thereby raising or lowering the movable rail 104. Figure 1 and Figure 2 , Figure 3 An exploded view of the structure of the control module 206 is shown. Figure 4 Then draw a cross-sectional view of the control module 206.

[0115] See Figure 1-4 The control module 206 may include a housing 210, which may be fixed to the top rail 102. The housing 210 may have an inner cavity 210A suitable for accommodating at least some of the components of the control module 206. According to one example, the housing 210 may include two housings 212A, 212B and a cover 212C and a bracket 212D, with the housings 212A and 212B fixedly connected to define at least a portion of the inner cavity 210A, and the cover 212C and the bracket 212D fixedly connected to the housings 212A to close one side of the inner cavity 210A.

[0116] See Figure 3 and 4The control module 206 may include a shaft coupling 214, a brake spring 216, a brake engagement 218, a lifting actuation module 220, and a clutch mechanism 222, all of which are connected to the housing 210.

[0117] To facilitate the assembly of components, housing 210 may include a fixed shaft 224 having multiple segments of different sizes. According to one example, fixed shaft 224 may include a protrusion 226 fixed to bracket 212D, and a shaft portion 228 fixed to protrusion 226. Protrusion 226 and shaft portion 228 are generally coaxial about longitudinal axis 208. It should be understood that protrusion 226 and shaft portion 228 may also be single-piece components, which may be fastened to bracket 212D or integrally formed.

[0118] The shaft coupling 214 is at least partially received within the inner cavity 210A of the housing 210 and can extend outwardly from the housing 212B. According to one embodiment, the shaft coupling 214 can be a single component with an elongated shape. The shaft coupling 214 can be pivotally connected about a fixed shaft 224, wherein the shaft portion 228 of the fixed shaft 224 can be inserted into a through hole 230 provided in the shaft coupling 214.

[0119] Shaft coupling 214 is pivotally coupled to drive shaft 202, allowing drive shaft 202 and shaft coupling 214 to pivot synchronously about longitudinal axis 208 relative to housing 210. For example, one end of drive shaft 202 can be inserted into through hole 230 on the side of shaft coupling 214 opposite to fixed shaft 224. Furthermore, drive shaft 202 can be fixed to shaft coupling 214 by fasteners (not shown). Accordingly, shaft coupling 214 can be pivotally coupled to winding unit 204 via drive shaft 202, allowing drive shaft 202 and shaft coupling 214 to pivot synchronously about longitudinal axis 208 to raise and lower movable rail 104.

[0120] The brake spring 216 has an engaged state suitable for preventing the drive shaft 202 from pivoting and an unengaged state allowing the drive shaft 202 to pivot. Specifically, in the engaged state, the brake spring 216 can apply a braking force suitable for preventing the brake engagement 218 from pivoting. According to one example, the brake spring 216 and the brake engagement 218 can be arranged about the longitudinal axis 208. For example, the brake engagement 218 can have a hollow interior 232 and be arranged about the middle section of the shaft coupling 214, such that the middle section of the shaft coupling 214 passes through the hollow interior 232 and maintains a gap with the brake engagement 218. Therefore, the shaft coupling 214 can pivot relative to the brake engagement 218 during operation.

[0121] A brake spring 216 is disposed around a brake engagement 218 and contacts the outer surface 234 of the brake engagement 218, enabling the brake spring 216 to apply a braking force to the brake engagement 218 to prevent the brake engagement 218 from pivoting about the longitudinal axis 208. For example, the outer surface 234 may be defined on a ring portion of the brake engagement 218, and the brake spring 216 may include a torsion spring surrounding the ring portion of the brake engagement 218 and configured to frictionally contact the outer surface 234. In the engaged state, the brake spring 216 can be tightened and apply a braking force to the brake engagement 218 through the frictional contact between the brake spring 216 and the outer surface 234 of the brake engagement 218. In the disengaged state, the brake spring 216 can expand and release the frictional contact between the brake spring 216 and the outer surface 234 of the brake engagement 218.

[0122] See Figure 3 , 4 The lifting actuation module 220 may include a drum 236, an operating member 238, and a spring 240, wherein the drum 236 is connected to the operating member 238, and the spring 240 is connected to the drum 236. The operating member 238 may be a linear elastic element, one end of which is fixed to the drum 236. The operating member 238 may include, for example, but is not limited to, a rope, a belt, etc. The drum 236 is pivotally connected to the housing 210, such that the drum 236 can pivot in the winding direction to wind up the operating member 238, and pivot in the extension direction to extend the operating member 238. According to one embodiment, the drum 236 may be pivotally connected about a fixed axis 224, such that the drum 236 can pivot about a longitudinal axis 208 to wind up the operating member 238 and to extend the operating member 238.

[0123] Spring 240 is connected to drum 236 and adapted to bias drum 236 to pivot in the winding direction. According to one embodiment, drum 236 may have a cavity 242 through which a fixed shaft 224 passes. Spring 240 may be disposed within the cavity 242 about the fixed shaft 224, with both ends of spring 240 connected to the fixed shaft 224 (e.g., at its protrusion 226) and drum 236, respectively. Lifting the actuation module 220 can be achieved by pulling the actuating member 238 to pivot drum 236 in the extension direction onto movable rail 104. When the actuating member 238 is released, spring 240 can cause drum 236 to pivot and wind up at least a portion of the actuating member 238.

[0124] The clutch mechanism 222 is configured to selectively couple the shaft coupling 214 to one of the lifting actuation module 220 and the brake engagement 218. The clutch mechanism 222 couples the shaft coupling 214 to the drum 236 of the lifting actuation module 220 and decouples the shaft coupling 214 from the brake engagement 218 in response to the pivoting of the drum 236 in the extension direction. Furthermore, when the drum 236 pivots in the winding direction, the clutch mechanism 222 can decouple the shaft coupling 214 from the drum 236 and couple the shaft coupling 214 to the brake engagement 218. Accordingly, when the drum 236 pivots in the extension direction, the shaft coupling 214 and the drum 236 are not subject to the braking force of the brake spring 216 and can pivot synchronously relative to the brake engagement 218, making it easier to pull up the movable rail 104 and reducing friction between the components. When the drum 236 pivots in the winding direction, the braking force of the brake spring 216 in the engaged state can be applied to the shaft coupling 214 through the brake coupling 218 and the clutch mechanism 222, thus preventing the shaft coupling 214 and the drive shaft 202 from pivoting. The movable rail 104 can thereby maintain its position relative to the top rail 102. As described below, the clutch mechanism 222 may include two clutches 244, 246, which are movable relative to the brake coupling 218 and the drum 236 to selectively couple the shaft coupling 214 to one of the drum 236 and the brake coupling 218.

[0125] Cooperate Figure 3 , 4 , Figure 5 An exploded view of the clutch mechanism 222 is shown. (See attached diagram.) Figure 3-5 The brake engagement member 218 and the clutch member 244 are disposed around the middle portion 248 of the shaft engagement member 214, while another clutch member 246 is disposed adjacent to one end 250 of the shaft engagement member 214. The clutch member 244 is coupled to the brake engagement member 218 and is movable relative to the shaft engagement member 214 and the brake engagement member 218 between a disengaged position and an engaged position, wherein the clutch member 244 is disengaged from the shaft engagement member 214 when it is in the disengaged position and engaged with the shaft engagement member 214 when it is in the engaged position. The clutch member 246 is coupled to the drum 236 and is movable relative to the shaft engagement member 214 and the drum 236 between a disengaged position and an engaged position, wherein the clutch member 246 is disengaged from the shaft engagement member 214 when it is in the disengaged position and engaged with the shaft engagement member 214 when it is in the engaged position.

[0126] The controlled movement of clutches 244 and 246 allows for switching the coupling state of shaft coupling 214 relative to brake engagement 218 and the drum 236 of lifting actuation module 220. Specifically, clutch mechanism 222 is configured such that rotation of drum 236 in the extension direction causes clutch 246 to move to the engaged position and clutch 244 to move to the disengaged position, thereby enabling drum 236, shaft coupling 214, and clutch 246 to pivot synchronously relative to brake engagement 218. Furthermore, clutch mechanism 222 is configured such that rotation of drum 236 in the winding direction causes clutch 246 to move to the disengaged position, and clutch 244 can be switched to the engaged position when clutch 246 is disengaged from shaft coupling 214, thereby adapting the braking force of brake spring 216 to prevent shaft coupling 214 from pivoting.

[0127] Each of the clutches 244 and 246 may be a single-unit movable element. According to one example, the two clutches 244 and 246 may be configured to slide in opposite directions along the longitudinal axis 208 to selectively couple the shaft coupling 214 to one of the drum 236 and the brake engagement 218. For example, clutch 244 may be annular, with the middle portion 248 of shaft coupling 214 passing through it, thereby allowing clutch 244 to slide relative to shaft coupling 214 along the middle portion 248. Clutch 246 may similarly be annular and may be configured to slide along the shaft portion 228 of fixed shaft 224.

[0128] See Figure 3-5 The clutch 244 is coupled to the brake engagement member 218 and can move between an engaged position and a disengaged position when it slides into the brake engagement member 218. According to one example, the clutch 244 is disposed about the middle portion 248 of the shaft coupling 214 and is at least partially housed within the hollow interior 232 of the brake engagement member 218. The connection between the brake engagement member 218 and the clutch 244 allows limited movement of the clutch 244 relative to the brake engagement member 218 between the disengaged and engaged positions. For this purpose, the clutch 244 can slide into the brake engagement member 218 within the hollow interior 232, and this sliding contact can be achieved by at least one inclined surface provided on the clutch 244 or the brake engagement member 218. For example, the clutch 244 may have a notch 252 at a location offset from the longitudinal axis 208, and the inner wall 254 of the brake engagement 218, which at least partially defines its hollow interior 232, may have a protrusion 256, which is restricted to sliding within the notch 252. The notch 252 of the clutch 244 may have a ramp 258 extending between two stop surfaces 260A and 260B, and the protrusion 256 of the brake engagement 218 may have a ramp 262 extending between two stop surfaces 264A and 264B, and the ramp 258 may slidably contact the ramp 262.

[0129] With the structure described above, the clutch 244 can move relative to the brake engagement member 218 between an engaged position and an disengaged position, with the inclined surface 258 sliding in contact with the inclined surface 262. Specifically, the clutch 244 can pivot about the longitudinal axis 208 and simultaneously slide along the longitudinal axis 208 to switch between the disengaged and engaged positions, while the protrusion 256 of the brake engagement member 218 moves between the two stop surfaces 260A and 260B of the notch 252 during the movement of the clutch 244 relative to the brake engagement member 218. When the clutch 244 is in the disengaged position, the shaft engagement member 214 can pivot about the longitudinal axis 208, while the brake engagement member 218 and the clutch 244 simultaneously remain static. When the clutch 244 is in the engaged position, the shaft coupling 214 is pivotally coupled to the clutch 244, and the braking force applied by the brake spring 216 to the brake coupling 218 is adapted to prevent the shaft coupling 214 and the clutch 244 from pivoting through the contact between the stop surface 260A of the clutch 244 and the stop surface 264A of the brake coupling 218.

[0130] See Figure 3-5 The shaft coupling 214 may include a plurality of protruding teeth 266 distributed around the longitudinal axis 208, while the clutch 244 may include a plurality of protruding teeth 268 distributed around the longitudinal axis 208. The protruding teeth 268 engage with the protruding teeth 266 when the clutch 244 is in the engaged position and disengage from the protruding teeth 266 when the clutch 244 is in the disengaged position. The protruding teeth 266 may be disposed along the first circumference of the shaft coupling 214 at one end of the intermediate portion 248, while the protruding teeth 268 may be disposed along the circular edge extending around the intermediate portion 248 in the clutch 244 and facing the protruding teeth 266 of the shaft coupling 214. The protruding teeth 266 and 268 may be serrated. When clutch 244 is in the engaged position, the meshing action between cams 266 and 268 allows torque transmission only in direction R1 from shaft coupling 214 to clutch 244, and allows shaft coupling 214 to pivot relative to clutch 244 in a direction R2 opposite to direction R1. Direction R1 is the pivoting direction corresponding to the movement of stop surface 260A of clutch 244 toward stop surface 264A of brake engagement 218. The torque in direction R1 can be generated by the suspended load of movable rail 104. When clutch 244 is in the engaged position, the braking force of brake spring 216 resists the torque in direction R1, thereby allowing movable rail 104 to maintain its position. When the shaft coupling 214 pivots in direction R2, the arrangement of the convex teeth 266 and 268 enables the shaft coupling 214 to push the clutch 244 away from the engagement position and move the clutch 244 away from the engagement position to the disengagement position.

[0131] See Figure 3-5The clutch 246 is coupled to the drum 236 of the lifting actuation module 220 and can move between an engaged position and a disengaged position when sliding contacting the drum 236. According to one embodiment, the clutch 246 is disposed about a shaft 228 and at least partially housed within the hollow interior of the drum 236. The clutch 246 can be coupled to the drum 236 by a sliding engagement configured such that rotation of the drum 236 in the extension direction (i.e., the direction of extension of the operating member 238) causes the clutch 246 to slide toward the shaft coupling 214 to the engaged position, and rotation of the drum 236 in the winding direction (i.e., the direction of winding the operating member 238) causes the clutch 246 to slide away from the shaft coupling 214 to the disengaged position. The sliding engagement between the drum 236 and the clutch 246 can be achieved by at least one inclined surface provided on the clutch 246 or the drum 236.

[0132] Figure 6 and Figure 7 A partial sectional view illustrating an example sliding engagement between the roll 236 and the clutch 246. (See attached image.) Figure 3-7 The clutch 246 may have a ramp 270 radially away from the longitudinal axis 208, and the drum 236 may have a protrusion 272 that slides in contact with the ramp 270. The ramp 270 may be defined, for example, by an edge of a groove 270A provided on the circumferential surface of the clutch 246, while the protrusion 272 may be provided on the inner wall of the drum 236. It should be understood that the sliding engagement method may also involve the ramp 270 being provided in the drum 236 and the protrusion 272 being provided in the clutch 246. By means of this sliding engagement method, the clutch 246 can pivot about the longitudinal axis 208 in response to the pivoting operation of the drum 236 and simultaneously slide along the longitudinal axis 208 to transition between an engaged position and an disengaged position. The clutch 246 in Figure 6 In the disengaged position, Figure 7 The middle part is in the joining position.

[0133] like Figure 3 and Figure 4 As shown, clutch 246 can be connected to torsion spring 274, which is tightly disposed around shaft 228. Torsion spring 274 provides resistance to help clutch 246 maintain the disengaged position.

[0134] See Figure 3-7The shaft coupling 214 may include a plurality of protruding teeth 276 distributed around the longitudinal axis 208 and axially spaced from the protruding teeth 266, while the clutch 246 may include a plurality of protruding teeth 278 distributed around the longitudinal axis 208. The protruding teeth 278 engage with the clutch 246 when it is in the engaged position and disengage from the clutch 246 when it is in the disengaged position. The protruding teeth 276 may be disposed along the second circumference of the shaft coupling 214 at the other end of the intermediate portion 248, and the second circumference is smaller than the first circumference in the shaft coupling 214 where the protruding teeth 266 are located. The protruding teeth 276 and 278 may be serrated. When the clutch 246 is in the engaged position, the meshing action between the convex teeth 276 and 278 allows torque transmission from the drum 236 and the clutch 246 to the shaft coupling 214 only in the direction R2, and allows the drum 236 and the clutch 246 to pivot relative to the shaft coupling 214 in the direction R1.

[0135] The following will refer to Figure 3-7 Example operation of clutch mechanism 222 is explained. Assuming clutch 244 is in the engaged position and clutch 246 is in the disengaged position, clutch mechanism 222 is in a state corresponding to coupling of shaft coupling 214 and brake coupling 218 and disengagement from drum 236. By pulling actuating member 238, drum 236 can pivot in the extension direction R2, causing clutch 246 to slide from the disengaged position to the engaged position in direction D1, allowing shaft coupling 214 to pivot in direction R2 via clutch 246 and drum 236. Due to the arrangement of serrations 266 and 268, the linked pivoting of drum 236 and shaft coupling 214 in direction R2 then causes clutch 244 to slide from the engaged position to the disengaged position in direction D2, opposite to direction D1, thereby disengaging shaft coupling 214 from brake coupling 218. Therefore, the clutch mechanism 222 can be converted into a state where the shaft coupling 214 is decoupled from the brake engagement 218 and coupled to the drum 236, allowing it to pivot in the direction R2. In this state, the braking force of the brake spring 216, which is in the engaged state, is no longer applied to the shaft coupling 214. With the brake engagement 218 and the clutch 244 remaining static, the drum 236, the clutch 246, the shaft coupling 214, and the drive shaft 202 can pivot synchronously to pull up the movable rail 104.

[0136] When the operating member 238 is released after extending from the drum 236, the spring 240 causes the drum 236 to pivot in the winding direction R1 to wind up the operating member 238. The rotation of the drum 236 in direction R1 causes the clutch 246 to slide from the engaged position to the disengaged position in direction D2, thereby pivotally disengaging the shaft coupling 214 from the drum 236. The suspended load of the movable rail 104 then causes the shaft coupling 214 to pivot in direction R1. Due to the sliding contact between the ramp 258 of the clutch 244 and the ramp 262 of the brake engagement member 218, and the frictional contact between the shaft coupling 214 and the clutch 244, the rotation of the shaft coupling 214 in direction R1 causes the clutch 244 to pivot and slide in direction D1 from the disengaged position to the engaged position, thereby coupling the shaft coupling 214 to the brake engagement member 218 via the clutch 244. Therefore, the clutch mechanism 222 can be converted into a state where the shaft coupling 214 is coupled to the brake coupling 218 and decoupled from the drum 236. In this state, the braking force of the brake spring 216, which is in the engaged state, can be applied to the shaft coupling 214 to prevent it from pivoting in the direction R1, thereby maintaining the position of the movable rail 104 relative to the top rail 102, while the drum 236 simultaneously pivots in the direction R1 to wind up the operating member 238.

[0137] In the clutch mechanism 222, clutch member 244 can slide in direction D1 while clutch member 246 can slide in the opposite direction D2 to pivotally couple shaft coupling member 214 to brake engagement member 218 and simultaneously pivotally decouple shaft coupling member 214 from drum 236. Conversely, clutch member 244 can slide in direction D2 while clutch member 246 can slide in the opposite direction D1 to pivotally couple shaft coupling member 214 to drum 236 and simultaneously pivotally decouple shaft coupling member 214 from brake engagement member 218. Because shaft coupling member 214 couples only one of brake engagement member 218 and drum 236 at a time, unfavorable friction between shaft coupling member 214 and brake engagement member 218 can be prevented when shaft coupling member 214 and drum 236 pivot synchronously.

[0138] See Figure 1-4 8. The control module 206 also includes a brake actuation mechanism 302. The brake actuation mechanism 302 is coupled to the brake spring 216 and includes a switching actuator 306, which is movably connected to the housing 210 and has at least a first position and a second position. The switching actuator 306 is operable between the first position and the second position to cause the brake spring 216 to switch between an engaged state and a disengaged state, wherein the first position of the switching actuator 306 corresponds to the engaged state of the brake spring 216, and the second position of the switching actuator 306 corresponds to the disengaged state of the brake spring 216.

[0139] See Figure 1-48. The brake actuation mechanism 302 may include a switching actuator 306 and a spring coupling member 308. The spring coupling member 308 is connected to the brake spring 216, and the switching actuator 306 is connected to the spring coupling member 308 through a transmission assembly 310. The brake spring 216 may be configured as described above to frictionally contact the outer surface 234 of the brake engagement member 218, and the two ends 216A and 216B of the brake spring 216 may be fixedly connected to the housing 210 and the spring coupling member 308, respectively.

[0140] The spring coupling 308 is configured to be movable, causing the brake spring 216 to switch between an engaged state and a disengaged state. According to one example, the spring coupling 308 may be configured to pivot about a longitudinal axis 208 to cause the brake spring 216 to switch between an engaged state and a disengaged state. For example, the spring coupling 308 may have a ring portion pivotally disposed about the middle portion 248 of the shaft coupling 214. The spring coupling 308 can thereby pivot relative to the shaft coupling 214, causing the end portion 216B of the brake spring 216 to move in one direction, causing the brake spring 216 to expand and release its frictional contact with the brake engagement member 218, or causing the end portion 216B to move in the opposite direction, causing the brake spring 216 to tighten its frictional contact with the brake engagement member 218.

[0141] The switching actuator 306, when operated, causes the spring coupling 308 to move, thereby switching the brake spring 216 between an engaged state and a disengaged state. The switching actuator 306 can have any structure suitable for manual operation. For example, the switching actuator 306 may include a bar extending along its long axis Y and exposed for easy operation. An operating member 238 extends through the hollow interior of the bar of the switching actuator 306, and one end of the operating member 238 may be fixed to a handle 312. The handle 312 is located adjacent to the end of the switching actuator 306 and can be pulled away from the switching actuator 306 to extend the operating member 238 from the drum 236. A guide 287 may be provided in the housing 210 to guide the operating member 238.

[0142] See Figure 3 , 4 8. The transmission assembly 310 includes multiple transmission elements, and the switching actuator 306 is connected to the spring coupling member 308 through the multiple transmission elements. The configuration of the transmission assembly 310 enables the actuation displacement of the switching actuator 306 to be transmitted through the transmission assembly 310 to cause the spring coupling member 308 to move, thereby switching the brake spring 216 between an engaged state and a disengaged state.

[0143] According to one embodiment, the connection between the switching actuator 306 and the housing 210 allows the switching actuator 306 to pivot relative to the housing 210 about its long axis Y, and the transmission element of the transmission assembly 310 is configured to convert the pivoting action of the switching actuator 306 about the long axis Y into the pivoting action of the spring coupling 308 about the longitudinal axis 208. For example, the transmission assembly 310 may include two transmission elements 314, 316, which may include gears. Transmission element 316 has a gear portion 316A, which is pivotally connected to the housing 210 and to the switching actuator 306 via a pivot axis 316R. Transmission element 314 has two gear portions 314A, 314B, and is pivotally mounted in the housing 210 via a pivot axis 314R. The gear portion 316A of transmission member 316 meshes with the gear portion 314A of transmission member 314, while the gear portion 314B of transmission member 314 meshes with the gear portion 308A provided on spring coupling member 308. The two transmission members 314 and 316 can be configured to pivot about two perpendicular pivot axes 314R and 316R, respectively, wherein the pivot axis 314R of transmission member 314 is parallel to the longitudinal axis 208, and the pivot axis 316R of transmission member 316 is tilted at an angle relative to the vertical direction. With this configuration, the rotation of switching actuator 306 about its major axis Y can be transmitted to spring coupling member 308 via transmission assembly 310, thereby causing spring coupling member 308 to pivot and causing brake spring 216 to switch between an engaged state and a disengaged state. Furthermore, the pivotal connection between transmission member 316 and switching actuator 306 allows switching actuator 306 to change its tilt angle, making switching actuator 306 easier to operate.

[0144] See Figure 3 , 9 -12, the control module 206 also includes a stop mechanism 320, which is coupled to the brake actuation mechanism 302 and can switch between a first bias state and a second bias state. When the stop mechanism 320 is in the first bias state, it applies a first bias force F1 to assist in maintaining the actuator 306 in the first position (e.g., Figure 10 As shown), when the stop mechanism 320 is in the second bias state, a second bias force F2 is applied to maintain the auxiliary switching actuator 306 in the second position (as shown). Figure 12 (As shown). Specifically, the stop mechanism 320 includes a spring 322 configured to be loaded as the switching actuator 306 moves between a first position and a second position, and to apply a first bias force F1 when the switching actuator 306 is in the first position and a second bias force F2 when the switching actuator 306 is in the second position.

[0145] See Figure 3 , 9-12, the stop mechanism 320 can be coupled to the transmission member 314, and each of the first biasing force F1 and the second biasing force F2 is an off-axis force applied to the transmission member 314. Specifically, the transmission member 314 has an eccentric portion 324, and the stop mechanism 320 can apply either the first biasing force F1 or the second biasing force F2 to the eccentric portion 324 of the transmission member 314. The eccentric portion 324 is fixed to the transmission member 314, so that the eccentric portion 324 and the transmission member 314 can move synchronously about the pivot axis 314R. According to one embodiment, the eccentric portion 324 can be integrally formed with the transmission member 314.

[0146] See Figure 3 , 9 -12, the stopping mechanism 320 may include a pivot 326, a connecting member 328, and a spring 322. The pivot 326 is configured to pivot about a pivot axis 326R. The connecting member 328 is pivotally connected to the eccentric portion 324 of the transmission member 314 and is configured to slide radially relative to the pivot axis 326R of the pivot 326. The spring 322 is connected to the pivot 326 and the connecting member 328 and is configured to apply a first biasing force F1 or a second biasing force F2.

[0147] Pivoting member 326 is pivotally connected to housing 210 via pivot axis 326R. The pivot axis 326R of pivoting member 326 is parallel to and spaced apart from the pivot axis 314R of transmission member 314.

[0148] The connecting member 328 is slidably connected to the pivot member 326, and is pivotally connected to the eccentric portion 324 of the transmission member 314 via the pivot axis 328R. According to one embodiment, the connecting member 328 may be a rod having a first end and a second end, the first end being slidably connected to the pivot member 326, and the second end being pivotally connected to the eccentric portion 324 of the transmission member 314.

[0149] One end of the spring 322 can be connected to the pivot 326, and the other end of the spring 322 can be connected to the connecting member 328. According to one embodiment, the spring 322 can be a compression spring disposed around the connecting member 328, and can be connected to a flange disposed on the connecting member 328. During operation, the spring 322 can generate an elastic force as a first biasing force F1 or a second biasing force F2 applied to the eccentric portion 324 of the transmission member 314.

[0150] The following will refer to Figure 3 , 9-12 illustrates an example operation of the stop mechanism 320. When the switching actuator 306 moves between a first position and a second position, the transmission member 314 pivots about a pivot axis 314R, the connecting member 328 pivots about a pivot axis 328R relative to the transmission member 314 and simultaneously slides relative to the pivot member 326, while the pivot member 326 pivots about a pivot axis 326R relative to the housing 210. The movement of the switching actuator 306 between the first and second positions causes the pivot axis 328R of the connecting member 328 to pass through the junction line L between the pivot axis 314R of the transmission member 314 and the pivot axis 326R of the pivot member 326, and causes the stop mechanism 320 to switch between a first bias state and a second bias state.

[0151] See Figure 9 , 10 When the stop mechanism 320 is in the first bias state corresponding to the first position of the switching actuator 306, the pivot axis 328R of the connecting member 328 is located on the first side of the engagement line L. In the first bias state, the first bias force F1 applied by the spring 322 is located on the first side of the engagement line L, and assists the switching actuator 306 in maintaining the first position and the brake spring 216 in maintaining the engagement state.

[0152] See Figure 11 , 12 When the stop mechanism 320 is in the second biased state corresponding to the second position of the switching actuator 306, the pivot axis 328R of the connecting member 328 is located on the second side of the engagement line L relative to its first side. In the second biased state, the second biasing force F2 applied by the spring 322 is located on the second side of the engagement line L, and the second biasing force F2 is applied in a direction different from the first biasing force F1. The second biasing force F2 can counteract the spring force of the brake spring 216 and assist the switching actuator 306 in maintaining the second position and the brake spring 216 in the released state.

[0153] Cooperate Figure 1-12 , Figure 13 and Figure 14 The illustration shows an operation diagram of unfolding the curtain 100, wherein the curtain 100 is equipped with the aforementioned actuation system 200. (See attached diagram) Figure 1-10 Assuming the initial state is that the movable rail 104 maintains its position relative to the top rail 102, the switching actuator 306 is in the first position. Therefore, the shaft coupling 214 is decoupled from the drum 236 and coupled to the brake engagement 218 via the clutch 244, and the brake spring 216 is engaged. The clamping force exerted by the brake spring 216 on the brake engagement 218 prevents the shaft coupling 214 and the drive shaft 202 from pivoting in the direction of lowering the movable rail 104. Furthermore, the stop mechanism 320 is in a first bias state and applies a first bias force F1 (e.g., ...). Figure 10As shown, the actuator 306 is kept in the first position and the brake spring 216 is kept in the engaged state. Therefore, as long as the actuator 306 is in the first position, the brake spring 216 remains engaged.

[0154] See Figure 3-7 11-13. To unfold the curtain 100, the user can rotate the switching actuator 306 about its long axis Y from the first position to the second position in the direction X1, and release the switching actuator 306 in the second position. As described above, the rotation of the switching actuator 306 from the first position to the second position causes the spring coupling member 308 to move, causing the brake spring 216 to switch to the released state and release its frictional contact with the brake engagement member 218. Therefore, the drive shaft 202, shaft coupling member 214, brake engagement member 218, and clutch member 244 in the engaged position can pivot synchronously relative to the brake spring 216 by the action of gravity to lower the movable rail 104. While the shaft coupling member 214 and the drive shaft 202 continue to pivot to lower the movable rail 104, the roller 236 and the clutch member 246 can remain substantially static. Furthermore, the rotation of the actuator 306 from the first position to the second position can also cause the stop mechanism 320 to switch from the first bias state to the second bias state, allowing the stop mechanism 320 to apply a second bias force F2 (e.g., Figure 12 (As shown), this assists in maintaining the switching actuator 306 in the second position and the brake spring 216 in the released state. Therefore, when the movable rail 104 moves downward, the user does not need to apply additional force to maintain the switching actuator 306 in the second position. As long as the switching actuator 306 is in the second position, the brake spring 216 remains in the released state.

[0155] See Figure 3-7 14. When the lowered movable rail 104 reaches the desired position, the user can rotate the switching actuator 306 in the opposite direction X2 around the long axis Y, causing the switching actuator 306 to change from the second position to the first position. Therefore, the brake spring 216 can return to its engaged state, and the movable rail 104 can maintain the desired position relative to the top rail 102. Furthermore, the rotation of the switching actuator 306 from the second position to the first position can also cause the stop mechanism 320 to change from the second bias state to the first bias state, allowing the stop mechanism 320 to apply a first bias force F1 (e.g., ...). Figure 10 (As shown) to assist in switching actuator 306 to maintain the first position.

[0156] Cooperate Figure 1-8 , Figure 15 and Figure 16 The diagram illustrates the operation of a movable track 104 for drawing the curtain 100, wherein the curtain 100 is equipped with the aforementioned actuation system 200. (See attached diagram.) Figure 3-815. When the user wants to pull up the movable rail 104, they can use the handle 312 to pull down the operating member 238, thereby causing the drum 236 to pivot in the extension direction. Therefore, the clutch mechanism 222 can be converted to a state where the shaft coupling member 214 is decoupled from the brake coupling member 218 and coupled to the drum 236 through the clutch member 246, as described above. Accordingly, the drive shaft 202, the shaft coupling member 214, and the drum 236 can pivot synchronously to pull up the movable rail 104, while the brake spring 216 remains in the engaged state.

[0157] See Figure 3-8 16. The user can release the handle 312 when the movable rail 104 reaches the desired position or when the operating member 238 is extended to its maximum length. Then, the drum 236 can pivot by the action of the spring 240 to retract the operating member 238, and the clutch mechanism 222 can be switched to a state where the shaft coupling 214 is decoupled from the drum 236 and coupled to the brake engagement 218 through the clutch 244, as described above. Accordingly, the clamping action of the brake spring 216 on the brake engagement 218 prevents the shaft coupling 214 and the drive shaft 202 from pivoting, maintaining the movable rail 104 in its position, while the drum 236 can simultaneously pivot in the rewinding direction.

[0158] The actuation and release operation of the operating element 238 can be repeated multiple times until the movable rail 104 moves up to the desired position. During the operation of pulling up the movable rail 104, the switching actuator 306 can be maintained in the first position.

[0159] Figure 17 An exploded view is shown in which, according to another embodiment, the aforementioned transmission component 310 is replaced by a transmission component 310' in the control module 206. Figure 18 This section shows an enlarged view of some structural details of the transmission assembly 310'. (See attached image.) Figure 17 , 18 The transmission assembly 310' includes multiple transmission elements configured to convert the sliding motion of the switching actuator 306 in the vertical direction into the pivoting motion of the spring coupler 308 about the longitudinal axis 208, thereby causing the brake spring 216 to switch between an engaged state and a disengaged state. The switching actuator 306 is configured to switch between a first position and a second position by moving up and down, rather than by pivoting about its long axis Y.

[0160] See Figure 17 and Figure 18 The switching actuator 306 can be slidably connected to the housing 210 via a slider 340. For example, the slider 340 can be connected to the upper end of the switching actuator 306 and slidably accommodated in a channel provided within the housing 210. The switching actuator 306 and the slider 340 can slide up and down synchronously relative to the housing 210.

[0161] The transmission assembly 310' may include a transmission member 314 as described above, and will... Figure 3 The transmission member 316 shown is replaced by a transmission member 342, which meshes with the gear portion 314A of the transmission member 314 and the toothed portion 344 provided on the sliding member 340. The transmission member 342 may be a gear, which is pivotally connected to the housing 210 by a pivot axis 342R, and the pivot axis 342R is parallel to and spaced apart from the pivot axis 314R of the transmission member 314. The toothed portion 344 may extend substantially parallel to the sliding axis of the sliding member 340. With this configuration, the switching actuator 306 can slide downward from the first position to the second position, and through the transmission assembly 310', cause the spring coupling member 308 to pivot, thereby causing the brake spring 216 to change from the engaged state to the disengaged state. Conversely, the upward sliding of the switching actuator 306 from the second position to the first position causes the spring coupling member 308 to pivot in the opposite direction, causing the brake spring 216 to change from the disengaged state to the engaged state.

[0162] Figure 17 The control module 206 shown, except for the transmission assembly 310', has other components that can be connected to... Figure 3 The embodiments have similar structures and operations.

[0163] Cooperate Figure 17 , 18 , Figure 19 , 20 The illustration is shown as an unfolding feature. Figure 17 The diagram shows the operation of the curtain 100 via the control module 206. (See attached diagram.) Figure 17-19 To open the curtain 100, the user can pull the switching actuator 306 downwards from the first position to the second position in direction V1, and release the switching actuator 306 in the second position. The downward sliding of the switching actuator 306 causes the spring coupling member 308 to move, thereby causing the brake spring 216 to switch to the released state and release its frictional contact with the brake engagement member 218. Then, the drive shaft 202, shaft coupling member 214, brake engagement member 218, and their coupled clutch member 244 can pivot synchronously by gravity to lower the movable rail 104. Furthermore, the downward sliding of the switching actuator 306 from the first position to the second position also causes the stop mechanism 320 to switch from the first bias state to the second bias state, thereby allowing the stop mechanism 320 to apply a second bias force F2 (e.g., ...). Figure 12 (As shown) to assist in maintaining the switching actuator 306 in the second position. As described above, when the movable rail 104 moves down, the user does not need to apply additional force to maintain the switching actuator 306 in the second position.

[0164] See Figure 20When the movable rail 104 reaches the desired position, the user can cause the switching actuator 306 to slide upward in direction V2, changing the switching actuator 306 from the second position to the first position. Therefore, the brake spring 216 can return to its engaged state, and the movable rail 104 can maintain the desired position relative to the top rail 102. Furthermore, the upward sliding of the switching actuator 306 from the second position to the first position also causes the stop mechanism 320 to change from the second bias state to the first bias state, thereby allowing the stop mechanism 320 to apply a first bias force F1 (e.g., ...). Figure 10 (As shown) to assist in switching actuator 306 to maintain the first position.

[0165] To gather Figure 19 , 20 When the curtain 100 is in place, the movable track 104 can be pulled up by pulling and releasing the handle 312 as described above.

[0166] The actuation system of this invention provides a movable track for easily lowering and raising curtains with relatively little force. Furthermore, the actuation system is applicable to different types of curtains, which helps simplify curtain manufacturing.

[0167] The above description is based on several different embodiments of the present invention, wherein each feature may be implemented individually or in different combinations. Therefore, the disclosure of embodiments of the present invention is a specific example illustrating the principles of the present invention and should not be construed as limiting the present invention to the disclosed embodiments. Furthermore, the foregoing description and accompanying drawings are merely illustrative of the present invention and are not intended to limit it. Variations or combinations of other elements are possible and do not depart from the spirit and scope of the present invention.

Claims

1. An actuation system for a curtain, characterized in that, include: The drive shaft can pivot about its longitudinal axis; The brake spring has an engaged state suitable for preventing the drive shaft from pivoting and an unloaded state suitable for allowing the drive shaft to pivot. A brake actuation mechanism, coupled to the brake spring and including a switching actuator operable between a first position and a second position to cause the brake spring to switch between an engaged state and a disengaged state, wherein the first position of the switching actuator corresponds to the engaged state of the brake spring and the second position of the switching actuator corresponds to the disengaged state of the brake spring. as well as A stop mechanism is coupled to the brake actuation mechanism. The stop mechanism can switch between a first bias state and a second bias state. When the stop mechanism is in the first bias state, a first bias force is applied to assist the switching actuator in maintaining a first position. When the stop mechanism is in the second bias state, a second bias force is applied to assist the switching actuator in maintaining a second position. The stop mechanism includes a spring configured to be loaded as the switching actuator moves between a first position and a second position, and to apply a first bias force when the switching actuator is in the first position and a second bias force when the switching actuator is in the second position.

2. The actuation system according to claim 1, characterized in that, The brake actuation mechanism includes a spring coupling member connected to one end of the brake spring. The spring coupling member is pivotable about the longitudinal axis to cause the brake spring to switch between an engaged state and a disengaged state.

3. The actuation system according to claim 2, characterized in that, The brake actuation mechanism further includes multiple transmission components, and the switching actuator is connected to the spring coupling component through the multiple transmission components.

4. The actuation system according to claim 3, characterized in that, The plurality of transmission elements are configured to convert the pivoting action of the switching actuator into the pivoting action of the spring coupling element.

5. The actuation system according to claim 3, characterized in that, The plurality of transmission elements are configured to convert the sliding action of the switching actuator into the pivoting action of the spring coupling element.

6. The actuation system according to claim 3, characterized in that, The plurality of transmission components includes a first transmission component that engages with the spring coupling component.

7. The actuation system according to claim 6, characterized in that, Each of the first bias force and the second bias force is an off-axis force applied to the first transmission member.

8. The actuation system according to claim 6, characterized in that, The first transmission member has an eccentric portion, and the stop mechanism applies a first biasing force or a second biasing force to the eccentric portion of the first transmission member.

9. The actuation system according to claim 8, characterized in that, The stopping mechanism includes a pivot and a connecting member. The connecting member is slidably connected to the pivot and pivotally connected to the eccentric portion of the first transmission member, while the spring is connected to the pivot and the connecting member.

10. The actuation system according to claim 9, characterized in that, The connecting member is configured to slide radially relative to the pivot axis of the pivot member.

11. The actuation system according to claim 9, characterized in that, The first transmission member is pivotable about a first pivot axis, the pivoting member is pivotable about a second pivot axis, and the connecting member is pivotally connected to the eccentric portion of the first transmission member by a third pivot axis. The movement of the switching actuator between a first position and a second position causes the third pivot axis to pass through the junction line between the first pivot axis and the second pivot axis.

12. The actuation system according to claim 6, characterized in that, The plurality of transmission components further includes a second transmission component, and the first transmission component has a first gear portion and a second gear portion, wherein the first gear portion of the first transmission component meshes with the second transmission component, and the second gear portion of the first transmission component meshes with the spring coupling component.

13. The actuation system according to claim 1, characterized in that, The switching actuator includes a bar.

14. The actuation system according to claim 1, characterized in that, It also includes a brake engagement member, wherein the brake spring is in frictional contact with the brake engagement member in the engaged state, and is released from frictional contact with the brake engagement member in the released state.

15. The actuation system according to claim 14, characterized in that, Also includes: A shaft coupling component is pivotally coupled to the drive shaft; The lifting actuation module includes a connected spool and an operating member, the spool being pivotable in a winding direction to wind up the operating member and pivotable in an extension direction to extend the operating member; as well as A clutch mechanism is configured to selectively couple the shaft coupling to one of the drum and the brake engagement, wherein: when the shaft coupling is decoupled from the brake engagement and coupled to the drum, the drum and the shaft coupling can pivot synchronously relative to the brake engagement; When the shaft coupling is coupled to the brake coupling and decoupled from the drum, the engagement state of the brake spring is adapted to prevent the drive shaft from pivoting.

16. The actuation system according to claim 15, characterized in that, The operating element extends through the hollow interior of the switching actuator.

17. A curtain, characterized in that, include: A top rail, a movable rail, and a shielding structure disposed between the top rail and the movable rail; A winding unit is installed on the top rail, and the winding unit is connected to the movable rail via a suspension member; as well as The actuation system according to any one of claims 1 to 16, wherein the drive shaft is pivotally coupled to the winding unit, and the drive shaft is pivotable to pull up and lower the movable rail.

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