Power system of rolling curtain device and rolling curtain device

Abstract

The present invention provides a power system for a rolling curtain device, including a one-way resistance module, the one-way resistance module including a resistance module housing, a rotating shaft, a one-way transmission assembly, a mounting seat and a resistance member, the resistance member is used to provide a rotational resistance between the resistance module housing and the mounting seat; the one-way transmission assembly is installed between the mounting seat and the rotating shaft, so that the mounting seat rotates unidirectionally relative to the rotating shaft, thereby providing a one-way resistance when the curtain body is released from the rolling tube. The resistance can make up for the tolerance between the deadweight of the curtain body and the total resilience of the power coil spring module, so that the curtain body can stably stay at the required height, and can improve the hand feel of the cordless rolling curtain device when it is pulled down; the curtain body can be smoothly retracted, which improves the smoothness of the curtain body retraction of the cordless rolling curtain device.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling curtain equipment, and in particular to a power system of a rolling curtain device and a rolling curtain device having the power system. Background Art

[0002] The global roller blinds market has shown a steady growth trend in recent years. With the acceleration of urbanization and the improvement of residents' requirements for the quality of living environment, roller blinds have played an important role in modern architectural design with their unique functionality and design aesthetics. Roller blinds usually include roller blinds and roller shutter doors. In some emerging markets, the market demand for roller blinds and other products continues to grow, driving the rapid development of the entire industry.

[0003] The rolling curtain device uses a roller tube to drive the entire curtain body to roll up and down to achieve the lifting and lowering of the rolling curtain. When rising, the curtain body is wound on the roller tube, and when falling, the curtain body is released from the roller tube and slides down. During the use of the rolling curtain device, the user usually drops or raises the curtain body to the desired position manually or in other ways, and keeps the curtain body stably in the desired position. Existing rolling curtain devices usually use the elastic force of the coil spring to balance the gravity of the curtain body, so that the curtain body is kept in the desired position. However, there is a manufacturing tolerance between the elastic force of the coil spring and the gravity of the curtain body. The existence of manufacturing tolerance can easily cause the curtain body to slide down or roll up and cannot be stably maintained in the desired position.

[0004] In addition, if there is no limit device after the curtain body is pulled to the maximum length, it is easy for the curtain body to continue to be pulled due to inertia or failure to stop applying force in time, causing the curtain body to slide down until it exceeds the limit position, resulting in the connection between the curtain body and the roller tube being easily damaged due to exceeding the limit position. Summary of the invention

[0005] To this end, in view of at least one of the above problems, the present invention provides a power system for a rolling curtain device and a rolling curtain device.

[0006] The present invention is implemented by the following scheme:

[0007] The present invention provides a power system for a rolling curtain device, characterized by comprising:

[0008] A center rod, the center rod is used to be installed and fixed on the bracket;

[0009] At least one power coil spring module, the power coil spring module comprising a housing and a coil spring, the inner end of the coil spring being connected to the central rod, the outer end of the coil spring being connected to the housing, the housing being used for mounting and clamping with a coil tube, and the coil tube being used for winding a curtain body; and

[0010] A one-way resistance module, the one-way resistance module includes a resistance module shell, a rotating shaft, a one-way transmission assembly, a mounting seat and a resistance member, the rotating shaft is installed with the center rod, the resistance module shell is used to be clamped with the roller tube, the resistance module shell, the mounting seat and the rotating shaft can be relatively rotatably installed; the resistance member is provided between the resistance module shell and the mounting seat, the resistance member is used to provide rotational resistance between the resistance module shell and the mounting seat; the one-way transmission assembly is installed between the mounting seat and the rotating shaft, so that the mounting seat rotates unidirectionally relative to the rotating shaft, thereby providing one-way resistance when the curtain body is released from the roller tube.

[0011] In one embodiment, the one-way transmission assembly includes a swinging claw and a plurality of teeth arranged on the periphery of the rotating shaft; the swinging claw can be pivotally and swingably arranged on the mounting seat, and the teeth protrude from the outer peripheral surface of the rotating shaft in a radially inclined manner relative to the rotating shaft, and the swinging claw can cooperate with the teeth to realize the one-way rotation of the mounting seat relative to the rotating shaft.

[0012] In one embodiment, the tooth portion includes a guiding surface and a locking surface, the first end of the swinging claw has a first convex portion facing the tooth portion, the second end of the swinging claw has a second convex portion facing the tooth portion, and the side of the swinging claw facing the tooth portion is provided with a first guide surface and a second guide surface; when the mounting seat rotates along a first direction relative to the rotating shaft, the second guide surface can abut against the tooth portion, so that the second convex portion can swing the swinging claw due to the push of the tooth portion, and the swinging of the swinging claw can make the first convex portion abut against the locking surface of one of the tooth portions of the rotating shaft due to rotation, so that the rotation of the mounting seat relative to the rotating shaft along the first direction is locked.

[0013] In one embodiment, when the mounting seat rotates along the second direction relative to the rotating shaft, the tooth portion can abut against the first guide surface, the first protrusion at the first end of the swing claw can be pushed by the tooth portion to cause the swing claw to swing, the guide surface of the tooth portion can abut against the first protrusion of the swing claw, and the tooth portion can rotate past the first protrusion until it disengages from the first protrusion; the second direction is opposite to the rotation direction of the first direction.

[0014] In one embodiment, the number of the teeth is twice the number of the swing claws.

[0015] In one embodiment, the resistance member is a resistance torsion spring, the inner ring of the resistance torsion spring is tightly sleeved on the mounting seat, the inner cavity of the resistance module shell is provided with a pushing protrusion, the two ends of the resistance torsion spring respectively extend to the two sides of the pushing protrusion, when the resistance module shell rotates relative to the mounting seat, the pushing protrusion can push the resistance torsion spring to rotate relative to the mounting seat, and friction force is generated between the resistance torsion spring and the mounting seat as rotation resistance.

[0016] Among them, in one embodiment, the first end of the center rod is also connected to a main supporting seat, and the main supporting seat includes a rotating bearing, a supporting cylinder and a snap-fit ​​component. The supporting cylinder is provided with a rod mounting hole, and the rod mounting hole is used for mounting and cooperating with the first end of the center rod. The rotating bearing is used for snapping with the winding pipe, and the rotating bearing can be rotatably mounted on the supporting cylinder; the end face of the snap-fit ​​component is provided with a mounting structure mounted with a bracket, and the snap-fit ​​component is installed in the inner cavity of the supporting cylinder, and the mounting angle of the snap-fit ​​component relative to the supporting cylinder is adjustable.

[0017] In one embodiment, the snap member can be installed in the inner cavity of the supporting cylinder in an axially displaceable manner, and when the snap member is displaced to a first position relative to the supporting cylinder, the snap member is snapped with the supporting cylinder; a plurality of first snapping teeth are convexly provided on the outer circumferential surface of the snap member, and the plurality of first snapping teeth are evenly arranged around the outer circumferential surface of the snap member, a plurality of second snapping teeth are convexly provided on the inner wall surface of the cavity of the supporting cylinder, and the plurality of second snapping teeth are evenly arranged around the inner wall surface of the cavity of the supporting cylinder, and the first snapping teeth can be snapped with the second snapping teeth to limit the radial rotation of the snap member relative to the supporting cylinder, at which time the snap member is in a first position relative to the supporting cylinder; when the snap member is displaced to a second position relative to the supporting cylinder, the first snapping teeth can be disengaged from the second snapping teeth, and at this time the installation angle of the snap member relative to the supporting cylinder is adjustable.

[0018] In one embodiment, the second end of the center rod is also connected to a rotation limit device, and the rotation limit device includes a travel rod, a limit nut and a fixing nut. One end of the travel rod is connected to the second end of the center rod, and the limit nut is used to engage with the winding tube. The travel rod includes a rod-shaped body and a limit head. The outer surface of the rod-shaped body has an external thread, and the external thread can cooperate with the internal thread of the limit nut. The fixing nut is threaded on the travel rod, and the fixing nut is fixed to the travel rod by a locking screw; the limit nut is located between the limit head and the fixing nut.

[0019] In one embodiment, the limiting head is provided with a first limiting block, the limiting nut is provided with a second limiting block and a third limiting block on opposite sides thereof, and the fixing nut is provided with a fourth limiting block on the side facing the limiting nut, the first limiting block can abut against the second limiting block, and the third limiting block can abut against the fourth limiting block.

[0020] In one embodiment, the power system is applied to a cordless roller blind device.

[0021] The present invention further provides a rolling curtain device, characterized in that it comprises a power system of the rolling curtain device as described in any of the preceding items.

[0022] The technical solution provided by the present invention has the following technical effects:

[0023] 1. The power system of the roller blind device provided by the present invention includes a one-way resistance module, which includes a resistance module housing, a rotating shaft, a one-way transmission assembly, a mounting seat and a resistance member, wherein the resistance member is used to provide rotational resistance between the resistance module housing and the mounting seat; the one-way transmission assembly is installed between the mounting seat and the rotating shaft, so that the mounting seat rotates unidirectionally relative to the rotating shaft, thereby providing one-way resistance when the blind body is released from the roller tube. The resistance can make up for the tolerance between the deadweight of the blind body and the total resilience of the power coil spring module, so that the blind body can stably stay at the required height, and can also improve the hand feel of the cordless roller blind device when it is pulled down; and the blind body can be smoothly retracted, which improves the smoothness of the blind body retraction of the cordless roller blind device.

[0024] 2. The power system of the roller blind device provided by the present invention, the one-way transmission assembly includes a swinging claw and a plurality of teeth arranged on the outer periphery of the rotating shaft; the swinging claw can be pivotally swingably arranged on the mounting seat, the teeth protrude from the outer peripheral surface of the rotating shaft in a radially inclined manner relative to the rotating shaft, the swinging claw can cooperate with the teeth, so as to realize the one-way rotation of the mounting seat relative to the rotating shaft, and the interaction between the swinging claw and the teeth produces almost no noise, so that the user experience is improved. The swinging claw can be a rigid structure, with a simple structure and convenient manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional diagram of a specific embodiment of the rolling curtain device of the present invention;

[0026] Figure 2 is a partial exploded view of the rolling curtain device of this embodiment;

[0027] Figure 3 is a three-dimensional diagram of the power system of this embodiment;

[0028] Figure 4 is a full cross-sectional view of the power system of this embodiment;

[0029] Figure 5 is a partial exploded diagram of the power system of this embodiment;

[0030] Figure 6 is an exploded view of the power coil spring module of this embodiment;

[0031] Figure 7 is an exploded view of the one-way resistance module of this embodiment;

[0032] Figure 8 yes Figure 5 Full cross-sectional view of the middle unidirectional resistance module along the CC direction;

[0033] Fig. 9 is a three-dimensional diagram of the one-way resistance module of the embodiment with part of the housing hidden;

[0034] Fig.10 is a three-dimensional diagram of the jaws of this embodiment;

[0035] Fig.11 is a three-dimensional view of the spring seat of this embodiment;

[0036] Fig.12 is a three-dimensional diagram of the second housing of the embodiment;

[0037] Fig.13 is an exploded view of the main support seat of this embodiment;

[0038] Fig.14 is a full cross-sectional view of the main support seat of this embodiment;

[0039] Fig.15 is a full cross-sectional view of the supporting cylinder of this embodiment;

[0040] Fig.16 is a three-dimensional diagram of the rotation number limiting device of this embodiment;

[0041] Fig.17 is a three-dimensional diagram of the coiled tube of this embodiment;

[0042] Fig.18 is a three-dimensional diagram of the bracket of this embodiment;

[0043] Fig.19 It is a three-dimensional view of a snap-fit ​​component according to another embodiment. DETAILED DESCRIPTION

[0044] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0045] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0046] like Figure 1-14 As shown, this embodiment provides a rolling curtain device 1, which is a cordless type, and the curtain body can be manually pushed and pulled so that the curtain body stays at a desired height. In this embodiment, the rolling curtain device 1 is described as a rolling curtain. In other embodiments, the rolling curtain device 1 can also be a rolling door, etc.

[0047] In this embodiment, the rolling curtain device 1 includes a power system 10, an auxiliary support seat 20, a mounting bracket assembly 30, a rolling tube 40, and a curtain body 50. The first end 51 of the curtain body 50 is connected to the rolling tube 40, and the curtain body 50 can be wound around the rolling tube 40; the second end 52 of the curtain body 50 is provided with a balance bar 53, so as to increase the weight of the curtain body 50 and facilitate its stable maintenance at a desired position. Of course, in some embodiments, the balance bar 53 may not be provided.

[0048] The roller tube 40 is a hollow tubular structure, and has a first end 41 and a second end 42 opposite to each other. The power system 10 is disposed at the first end 41 of the roller tube 40. The power system 10 includes a power coil spring module 13 and a center rod 12. The power coil spring module 13 includes a coil spring module housing 131 and a coil spring 133. The inner end of the coil spring 133 is connected to the center rod 12, and the outer end is connected to the coil spring module housing 131. The coil spring module housing 131 is clamped with the roller tube 40. The torque generated by the coil spring 133 is used to offset the gravity of the curtain body 50 at different heights, so that the curtain body 50 stays at any height.

[0049] The auxiliary support seat 20 is disposed at the second end 42 of the reel 40. The auxiliary support seat 20 is used to support the second end 42 of the reel 40, and the rotating part of the auxiliary support seat 20 can rotate coaxially with the reel 40.

[0050] During operation, for the power system 10, when the curtain body 50 is manually pushed or pulled, the roller tube 40 rotates, driving the coil spring module housing 131 to rotate, so that the coil spring 133 generates a rebound force and generates a torque, which forms a moment balance with the curtain body 50, allowing the curtain body 50 to stay at a desired height.

[0051] In this embodiment, the number of the power coil spring modules 13 is 2. Of course, more or less power coil spring modules 13 can be configured according to actual needs. However, in actual application, there is a tolerance between the weight of the curtain body 50 and the total resilience of the power coil spring modules 13, which may cause the curtain body 50 to slide down automatically and cannot stay stably at the required height.

[0052] To this end, the power system 10 of this embodiment further includes a unidirectional resistance module 14 that can provide unidirectional resistance when the curtain body 50 is released from the roller tube 40 and slides down, and provides almost no resistance when the curtain body 50 is wound around the roller tube 40 and rises.

[0053] The unidirectional resistance module 14 includes a resistance module housing 141, a rotating shaft 142, a swinging claw 143, a mounting seat 144, and a resistance torsion spring 145. The resistance module housing 141 includes a first housing 1411 and a second housing 1412, and the first housing 1411 and the second housing 1412 are fixedly connected. A cavity is formed inside the resistance module housing 141, and the rotating shaft 142, the swinging claw 143, the mounting seat 144 and the resistance torsion spring 145 are installed in the cavity. The resistance module housing 141 is provided with a center hole 146, and the rotating shaft 142 can be rotatably installed in the center hole 146. A tooth portion 1421 is provided on the outer periphery of the rotating shaft 142.

[0054] A central rod hole 1422 is provided in the middle of the rotating shaft 142 for passing the central rod 12. The shape of the central rod hole 1422 matches the central rod 12, and the rotating shaft 142 is sleeved on the central rod 12, so that the rotation of the rotating shaft 142 relative to the central rod 12 is restricted.

[0055] A through hole 1446 is provided in the middle of the mounting seat 144, and the through hole 1446 is used for the rotation shaft 142 to pass through, so that the mounting seat 144 can be rotatably sleeved on the rotation shaft 142. The mounting seat 144 includes a spring mounting portion 1441 and a claw mounting portion 1442 that are connected to each other. A resistance member is provided between the resistance module housing 141 and the mounting seat 144, and the resistance member is used to provide rotation resistance between the resistance module housing 141 and the mounting seat 144. In this embodiment, the resistance member is a resistance torsion spring 145. Of course, in some embodiments, the resistance member can be a friction plate or other structure.

[0056] In this embodiment, the resistance torsion spring 145 is sleeved on the outer periphery of the spring mounting portion 1441, and the inner ring of the resistance torsion spring 145 is tightly sleeved on the mounting seat 144. The inner cavity of the resistance module housing 141 is provided with a pushing protrusion 14121, and the two ends of the resistance torsion spring 145 extend to the two sides of the pushing protrusion 14121 of the resistance module housing 141 respectively. When the resistance module housing 141 rotates relative to the mounting seat 144, the pushing protrusion 14121 can push the resistance torsion spring 145 to rotate relative to the mounting seat 144, and frictional force is generated between the resistance torsion spring 145 and the mounting seat 144 as rotational resistance. The size of the rotational friction force can be adjusted by adjusting the size of the tightening force between the inner ring of the resistance torsion spring 145 and the mounting seat 144.

[0057] A one-way transmission assembly is disposed between the rotating shaft 142 and the mounting seat 144. In this embodiment, the one-way transmission assembly includes a swinging claw 143 and a plurality of teeth 1421 disposed on the outer periphery of the rotating shaft 142. Of course, in some embodiments, the one-way transmission assembly may be a ratchet structure.

[0058] In this embodiment, the swing claw 143 is installed in the cavity of the claw mounting portion 1442. The claw mounting portion 1442 includes a mounting base plate 1443 and an enclosure portion 1444 extending from the edge of the mounting base plate 1443 in a direction perpendicular to the mounting base plate 1443. The mounting base plate 1443 and the enclosure portion 1444 together enclose the cavity of the claw mounting portion 1442. The mounting base plate 1443 of the claw mounting portion 1442 is provided with a mounting hole 1445, and the bottom surface of the swing claw 143 is provided with a pivot column 1435, which can be mounted and matched with the mounting hole 1445, so that the swing claw 143 can be pivotally mounted on the claw mounting portion 1442.

[0059] There are three swing claws 143, which are arranged around the outer periphery of the rotating shaft 142, and the swing claws 143 can cooperate with the teeth 1421 on the outer periphery of the rotating shaft 142, so as to realize the unidirectional rotation of the rotating shaft 142 relative to the mounting seat 144. Six teeth 1421 are arranged on the outer periphery of the rotating shaft 142. The teeth 1421 protrude from the outer peripheral surface of the rotating shaft 142 in an inclined manner relative to the radial direction of the rotating shaft 142. The teeth 1421 include a guiding surface 14211 and a locking surface 14212. The first end of the swing claw 143 has a first protrusion 1431 facing the teeth 1421, and the second end of the swing claw 143 has a second protrusion 1434 facing the teeth 1421. The side of the swing claw 143 facing the teeth 1421 is provided with a first guide surface 1432 and a second guide surface 1433. The number of the tooth portions 1421 is twice the number of the swing claws 143 , so that each swing claw 143 corresponds to two adjacent tooth portions 1421 .

[0060] Reference Figure 1-2 as well as Figure 8 When the curtain body 50 slides down, the roller tube 40 drives the resistance module housing 141 to rotate along the A direction. Under the action of the pushing protrusion 14121 of the resistance module housing 141, the resistance torsion spring 145 is driven to rotate along the A direction, and drives the mounting seat 144 to rotate along the A direction.

[0061] When the mounting seat 144 rotates along direction A relative to the rotating shaft 142, the swing claw 143 is driven to rotate along direction A around the central axis of the mounting seat 144, so that the tooth portion 1421 abuts against the second guide surface 1433, and the second protrusion 1434 at the second end of the swing claw 143 is pushed by the tooth portion 1421, so that the swing claw 143 swings, and the first protrusion 1431 located at the first end of the swing claw 143 enters between two adjacent tooth portions 1421; when the mounting seat 144 continues to rotate along direction A relative to the rotating shaft 142, the first protrusion 1431 abuts against the locking surface 14212 of the tooth portion 1421, and the rotation of the mounting seat 144 relative to the rotating shaft 142 along direction A is locked. At this time, the resistance module housing 141 is continuously driven to continue rotating in direction A. Under the continuous action of the push protrusion 14121 of the resistance module housing 141, the resistance torsion spring 145 rotates relative to the mounting seat 144. The resistance torsion spring 145 and the mounting seat 144 squeeze each other and generate a balanced rotational friction resistance between the two. The rotational friction resistance can make up for the tolerance between the deadweight of the curtain body 50 and the total resilience of the power coil spring module 13, so that the curtain body 50 can stay stably at the required height, and can improve the hand feel of the cordless rolling curtain device 1 when it is pulled down.

[0062] In this embodiment, refer to Fig. 9 During the recovery process of the curtain body 50, the roller tube 40 drives the resistance module housing 141 to rotate along the B direction. Under the action of the pushing protrusion 14121 of the resistance module housing 141, the resistance torsion spring 145 is driven to rotate along the B direction, and drives the mounting seat 144 to rotate along the B direction.

[0063] When the mounting seat 144 rotates relative to the rotating shaft 142 in the direction B, the swing claw 143 is driven to rotate and swing around the central axis of the mounting seat 144 in the direction B, so that the tooth portion 1421 abuts against the first guide surface 1432, and the first protrusion 1431 at the first end of the swing claw 143 is pushed by the tooth portion 1421. Fig. 9As shown, the swinging claw 143 is swung, and the guide surface 14211 of the tooth portion 1421 abuts against the first protrusion 1431 of the swinging claw 143, and rotates through the first protrusion 1431 until it is separated from the first protrusion 1431. At this time, the second protrusion 1434 at the second end of the swinging claw 143 is on one side of the guide surface 14211 of the other tooth portion 1421. The swinging claw 143 is continuously driven to rotate along the B direction around the central axis of the mounting seat 144. The second protrusion 1434 at the second end of the swinging claw 143 is pushed by the tooth portion 1421. Since the guide surface 14211 of the previous tooth portion 1421 has been separated from the first protrusion 1431 of the swinging claw 143, the swinging claw 143 is swung, so that the guide surface 14211 of the other tooth portion 1421 can rotate through the second protrusion 1434 until it is separated from the second protrusion 1434. The relative position between the tooth portion 1421 and the swing claw 143 repeats the above process continuously, so that the mounting seat 144 rotates almost without resistance relative to the rotating shaft 142 in the direction B, and at this time, the resistance torsion spring 145 does not rotate relative to the mounting seat 144, and no rotational friction is generated between the two. Therefore, during the process of retracting the curtain body 50, the curtain body 50 can be smoothly retracted under the action of the rebound force of the coil spring 133, thereby improving the smoothness of retracting the curtain body 50 of the cordless rolling curtain device 1.

[0064] The swing pawl 143 cooperates with the tooth portion 1421 to form a one-way rotation mechanism. In other embodiments, the one-way rotation mechanism can also be in the form of a ratchet pawl. However, the ratchet pawl is provided with a spring, which always pushes the pawl in the direction of the ratchet, so that noise is generated when the ratchet pawl rotates relative to each other. In this embodiment, the interaction between the swing pawl 143 and the tooth portion 1421 generates almost no noise, so that the user experience is improved. The swing pawl 143 can be a rigid structure with a simple structure and easy manufacturing.

[0065] The first end 121 of the center rod 12 is also connected to the main support seat 11. The main support seat 11 includes a rotating bearing 115, a supporting cylinder 114, and a snap member 113. A cavity with a single-sided opening is provided in the supporting cylinder 114, so that a cylinder bottom surface 1147 and a cylinder side wall 1141 are formed in the supporting cylinder 114. The cylinder bottom surface 1147 is recessed inward to form a rod mounting hole 1145, and the rod mounting hole 1145 is used to be installed and matched with the first end 121 of the center rod 12. The wall surface of the rod mounting hole 1145 is provided with a pin hole 1146, which is used to penetrate a pin shaft to limit the first end 121 of the center rod 12 to the rod mounting hole 1145. The limit installation here includes relative movement limit and relative rotation limit. The rotating bearing 115 is a cylindrical barrel structure, including a cylindrical cavity with a single-sided opening, and the rotating bearing 115 can be rotatably sleeved on the outer peripheral surface of the supporting cylinder 114.

[0066] The rotating bearing 115 is clamped to the roller tube 40, so that the rotating bearing 115 rotates coaxially with the roller tube 40. Figure 2-3 , Figure 13-14 as well as Fig.17 The outer surface of the rotating bearing 115 is provided with a clamping groove 1151, and the winding tube 40 includes a winding tube body 401. The inner cavity of the winding tube body 401 is provided with a clamping protrusion 402. The clamping groove 1151 can cooperate with the clamping protrusion 402, so that the rotating bearing 115 is clamped to the winding tube 40. The power coil spring module 13, the one-way resistance module 14, and the limiting nut 152 of the rotation number limiting device 15 have similar structures for clamping with the winding tube 40, which will not be repeated here.

[0067] Reference Figure 2-3 as well as Figure 13-15 The bottom surface of the cavity of the rotating bearing 115 is opened for the central rod 12 to pass through. The rotating bearing 115 is rotatably sleeved on the supporting cylinder 114; the end surface of the buckle member 113 is provided with a mounting structure with the bracket 31. In this embodiment, the mounting structure of the buckle member 113 and the bracket 31 is a buckle 1134 protruding from the end surface of the buckle member 113. The buckle member 113 is installed in the inner cavity of the supporting cylinder 114, and the mounting angle of the buckle member 113 relative to the supporting cylinder 114 is adjustable.

[0068] The latch 116 can lock the relative position of the rotating bearing 115 and the supporting cylinder 114, thereby preventing the rotating bearing 115 from loosening and deflecting during transportation.

[0069] The buckle member 113 can be installed in the inner cavity of the support cylinder 114 in an axially displaceable manner, and when the buckle member 113 is displaced to the first position relative to the support cylinder 114, the buckle member 113 is engaged with the support cylinder 114. Fig.14 As shown; when the snap member 113 is displaced to the second position relative to the support cylinder 114, the snap member 113 is separated from the support cylinder 114. At this time, the installation angle of the snap member 113 relative to the support cylinder 114 is adjustable, so that the angle of the snap 1134 protruding from the end face of the snap member 113 can be adjusted to facilitate the installation of the snap on the bracket 31 of different shapes and positions. After the adjustment is completed, the snap member 113 is displaced to the first position relative to the support cylinder 114, and the snap member 113 is snapped with the support cylinder 114 again. In this embodiment, refer to Fig.14 , pushing the snap member 113 inwardly along the N direction can cause the snap member 113 to move from the first position to the second position relative to the supporting cylinder 114.

[0070] The buckle member 113 is a cylindrical tube structure, including a cylindrical cavity with a single-side opening, and the cover end surface 1137 of the buckle member 113 is arranged outward away from the inner cavity of the support cylinder 114. The cover end surface 1137 is formed with a recessed portion 1135, and the bottom surface of the recessed portion 1135 is provided with a cover through hole 1136. In the cavity of the support cylinder 114, a support convex column 1142 is formed on the bottom surface 1147 of the cylinder, and the cover through hole 1136 is slidably matched with the support convex column 1142, so that the buckle member 113 can be installed in the inner cavity of the support cylinder 114 in an axially displaceable manner.

[0071] Reference Figure 13-14 The outer circumference of the buckle member 113 is convexly provided with a plurality of first engaging teeth 1132, and the plurality of first engaging teeth 1132 are evenly arranged around the outer circumference of the buckle member 113. The inner wall surface of the cavity of the support cylinder 114 is convexly provided with a plurality of second engaging teeth 1143, and the plurality of second engaging teeth 1143 are evenly arranged around the inner wall surface of the cavity of the support cylinder 114, and the first engaging teeth 1132 can be engaged with the second engaging teeth 1143, thereby limiting the radial rotation of the buckle member 113 relative to the support cylinder 114, and at this time, the buckle member 113 is in the first position relative to the support cylinder 114. Pushing the snap assembly 113 inward along the N direction can disengage the first snap-fitting tooth 1132 from the second snap-fitting tooth 1143, so that the snap assembly 113 can rotate radially relative to the supporting cylinder 114, thereby adjusting the angle of the snap 1134 protruding from the end face of the snap assembly 113 to facilitate the installation of the snap on brackets 31 of different shapes and positions.

[0072] The outer circumferential surface of the snap member 113 is provided with a first avoidance groove 1133 on one side of the first engaging tooth 1132, and the inner wall surface of the cavity of the supporting cylinder 114 is provided with a second avoidance groove 1148 on one side of the second engaging tooth 1143. When the snap member 113 is in the second position relative to the supporting cylinder 114, the first avoidance groove 1133 and the second avoidance groove 1148 can avoid the second engaging tooth 1143 and the first engaging tooth 1132 respectively, thereby allowing the snap member 113 to rotate radially relative to the supporting cylinder 114.

[0073] The supporting protrusion 1142 is also sleeved with an elastic element 112, which is, for example, a spring. The two ends of the elastic element 112 abut against the supporting cylinder 114 and the buckle member 113, respectively, so that the buckle member 113 is biased toward the first position relative to the supporting cylinder 114, that is, Fig.14 A connecting hole 1144 is formed at the center of the supporting protrusion 1142 . The connecting hole 1144 is connected to the fixing nail 111 , and the head of the fixing nail 111 is accommodated in the recessed portion 1135 , thereby limiting the position of the buckle member 113 .

[0074] In addition, the snap member 113 can be replaced by removing the fixing nail 111 to adapt to different mounting brackets 31. Fig.19 The cover end surface of the snap member 113' is provided with a groove similar to a "*" shape to match the bracket with a protruding structure.

[0075] Reference Figure 3-5 as well as Fig.16 , especially with reference to Fig.16 The second end 122 of the center rod 12 is also connected to a rotation limiter 15. The rotation limiter 15 includes a travel rod 151, a limit nut 152 and a fixing nut 153. One end of the travel rod 151 is connected to the second end 122 of the center rod 12, and the rotation of the travel rod 151 relative to the center rod 12 is limited. The winding tube 40 is engaged with the limit nut 152. from The limiting nut 152 rotates coaxially with the rolling tube 40. The travel rod 151 includes a rod-shaped body and a limiting head 1513. The outer surface of the rod-shaped body of the travel rod 151 has an external thread 1512. The external thread 1512 can cooperate with the internal thread of the limiting nut 152, so that the limiting nut 152 rotates relative to the travel rod 151 and also moves axially relative to the travel rod 151. The travel rod 151 is also threaded with a fixing nut 153. The fixing nut 153 is fixed to the travel rod 151 by a locking screw 154. The limiting nut 152 is located between the limiting head 1513 and the fixing nut 153, so as to limit the number of rotations of the limiting nut 152, so as to prevent the curtain body 50 from being easily applied with downward pulling force due to inertia or failure to stop pulling down in time after being pulled to the limit length, thereby causing the power system of the rolling curtain device 1 to fail and be damaged due to exceeding the limit position.

[0076] By loosening the locking screw 154, the position of the fixing nut 153 on the travel rod 151 can be adjusted along the M direction, such as Fig.15 As shown, the maximum number of rotations of the limit nut 152 is adjusted to adapt to curtains with different retracted lengths.

[0077] The limiting head 1513 is provided with a first limiting block 1511, and the limiting nut 152 is provided with a second limiting block 1521 and a third limiting block 1522 on opposite sides thereof, and the fixing nut 153 is provided with a fourth limiting block 1531 on the side facing the limiting nut 152. The first limiting block 1511 can abut against the second limiting block 1521, and the third limiting block 1522 can abut against the fourth limiting block 1531, so that the number of rotations of the limiting nut 152 can be more accurately limited, and the limiting is more reliable.

[0078] The auxiliary support seat 20 may have a structure similar to that of the main support seat 11 to support the second end portion 42 of the roller tube 40 .

[0079] Although this embodiment is described by taking the example that the power coil spring module 13, the unidirectional resistance module 14 and the rotation number limit device 15 are located at the same end of the winding tube 40, as those skilled in the art can imagine, at least one of the power coil spring module 13, the unidirectional resistance module 14 and the rotation number limit device 15 and the remaining components can be located at different ends of the winding tube 40, which is also a feasible technical solution.

[0080] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A power system for a rolling curtain device, characterized in that: include: A center rod, the center rod is used to be installed and fixed on the bracket; At least one power coil spring module, the power coil spring module comprising a housing and a coil spring, the inner end of the coil spring being connected to the central rod, the outer end of the coil spring being connected to the housing, the housing being used for mounting and clamping with a coil tube, and the coil tube being used for winding a curtain body; and A one-way resistance module, the one-way resistance module comprises a resistance module shell, a rotating shaft, a one-way transmission assembly, a mounting seat and a resistance member, the rotating shaft is installed with the center rod, the resistance module shell is used to be clamped with the roller tube, and the resistance module shell, the mounting seat and the rotating shaft can be relatively rotatably installed; the resistance member is arranged between the resistance module shell and the mounting seat, and the resistance member is used to provide rotational resistance between the resistance module shell and the mounting seat; the one-way transmission assembly is installed between the mounting seat and the rotating shaft, so that the mounting seat rotates unidirectionally relative to the rotating shaft, thereby providing unidirectional resistance when the curtain body is released from the roller tube; the one-way transmission assembly comprises a swinging claw and a plurality of teeth arranged on the outer periphery of the rotating shaft; the swinging claw can be pivotally and swingably arranged on the mounting seat, the teeth protrude from the outer peripheral surface of the rotating shaft in a radially inclined manner relative to the rotating shaft, and the swinging claw can cooperate with the teeth to realize the unidirectional rotation of the mounting seat relative to the rotating shaft.

2. The power system of the rolling curtain device according to claim 1, characterized in that: The tooth portion includes a guiding surface and a locking surface, the first end of the swinging claw has a first convex portion facing the tooth portion, the second end of the swinging claw has a second convex portion facing the tooth portion, and the side of the swinging claw facing the tooth portion is provided with a first guide surface and a second guide surface; when the mounting seat rotates along a first direction relative to the rotating shaft, the second guide surface can abut against the tooth portion, so that the second convex portion can swing the swinging claw due to the push of the tooth portion, and the swinging of the swinging claw can make the first convex portion abut against the locking surface of one of the tooth portions of the rotating shaft due to rotation, so that the rotation of the mounting seat relative to the rotating shaft along the first direction is locked.

3. The power system of the rolling curtain device according to claim 2, characterized in that: When the mounting seat rotates along the second direction relative to the rotating shaft, the tooth portion can abut against the first guide surface, the first protrusion at the first end of the swing claw can be pushed by the tooth portion to make the swing claw swing, the guide surface of the tooth portion can abut against the first protrusion of the swing claw, and the tooth portion can rotate past the first protrusion until it is disengaged from the first protrusion; The second direction is opposite to the first direction in rotation.

4. The power system of the rolling curtain device according to claim 1, characterized in that: The number of the teeth is twice the number of the swing claws.

5. The power system of the rolling curtain device according to claim 1, characterized in that: The resistance member is a resistance torsion spring, the inner ring of which is tightly sleeved on the mounting seat, the inner cavity of the resistance module shell is provided with a pushing protrusion, the two ends of the resistance torsion spring respectively extend to the two sides of the pushing protrusion, when the resistance module shell rotates relative to the mounting seat, the pushing protrusion can push the resistance torsion spring to rotate relative to the mounting seat, and friction force is generated between the resistance torsion spring and the mounting seat as rotation resistance.

6. The power system of the rolling curtain device according to claim 1, characterized in that: The first end of the center rod is also connected to a main support seat, which includes a rotating bearing, a supporting cylinder and a snap-fit ​​component. The supporting cylinder is provided with a rod mounting hole, and the rod mounting hole is used for mounting and cooperating with the first end of the center rod. The rotating bearing is used for snapping with the winding pipe, and the rotating bearing can be rotatably mounted on the supporting cylinder; the end face of the snap-fit ​​component is provided with a mounting structure mounted with a bracket, the snap-fit ​​component is installed in the inner cavity of the supporting cylinder, and the mounting angle of the snap-fit ​​component relative to the supporting cylinder is adjustable.

7. The power system of the rolling curtain device according to claim 6, characterized in that: The snap-fitting member can be installed in the inner cavity of the supporting cylinder in an axially displaceable manner, and when the snap-fitting member is displaced to a first position relative to the supporting cylinder, the snap-fitting member is snapped with the supporting cylinder; a plurality of first snap-fitting teeth are convexly provided on the outer circumferential surface of the snap-fitting member, and a plurality of the first snap-fitting teeth are evenly arranged around the outer circumferential surface of the snap-fitting member, a plurality of second snap-fitting teeth are convexly provided on the inner wall surface of the cavity of the supporting cylinder, and a plurality of the second snap-fitting teeth are evenly arranged around the inner wall surface of the cavity of the supporting cylinder, and the first snap-fitting teeth can be snap-fitted with the second snap-fitting teeth, thereby limiting the radial rotation of the snap-fitting member relative to the supporting cylinder, at which point the snap-fitting member is in a first position relative to the supporting cylinder; when the snap-fitting member is displaced to a second position relative to the supporting cylinder, the first snap-fitting teeth can be disengaged from the second snap-fitting teeth, and at which point the installation angle of the snap-fitting member relative to the supporting cylinder is adjustable.

8. The power system of the rolling curtain device according to claim 1, characterized in that: The second end of the center rod is also connected to a rotation limit device, which includes a travel rod, a limit nut and a fixing nut. One end of the travel rod is connected to the second end of the center rod, and the limit nut is used to engage with the winding tube. The travel rod includes a rod-shaped body and a limit head. The outer surface of the rod-shaped body has an external thread, and the external thread can cooperate with the internal thread of the limit nut. The fixing nut is threaded on the travel rod, and the fixing nut is fixed to the travel rod by a locking screw; the limit nut is located between the limit head and the fixing nut.

9. The power system of the rolling curtain device according to claim 8, characterized in that: The limiting head is provided with a first limiting block, the limiting nut is provided with a second limiting block and a third limiting block on opposite sides thereof, and the fixing nut is provided with a fourth limiting block on the side facing the limiting nut, the first limiting block can abut against the second limiting block, and the third limiting block can abut against the fourth limiting block.

10. The power system of the rolling curtain device according to claim 1, characterized in that: The power system is applied to a cordless rolling curtain device.

11. A rolling curtain device, characterized in that: A power system comprising the rolling curtain device as described in any one of claims 1 to 10.

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