Pull rod type semi-automatic curtain system
By introducing a tie rod semi -automatic control mechanism in the curtain system, the existing rolling curtain safety hazards and complex operations were solved, and the automatic rolling and suspension switching of the curtain cloth was realized, which enhanced the safety and operation convenience of use.
Patent Information
- Application Number
- CN202420340725.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-02-23
AI Technical Summary
The existing rolling curtain winding mechanism poses safety risks, especially when children may hook or hang ring-shaped beads when having fun indoors, and the operation is complicated.
A tie rod semi -automatic curtain system is designed. By setting up the tie rod operating mechanism and a rising clutch mechanism to achieve the automatic down and manual closure of the curtain, the operation is simple and safe.
The automatic rolling and hovering switching of the curtain is achieved, avoiding the safety hazards of the ring -shaped beads, simple and practical operation, and meeting the user's use needs.
Smart Images
Figure CN222414713U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of curtains, in particular to a pull-rod type semi-automatic curtain system. Background Art
[0002] Curtains are divided into roll-up curtains and tension curtains according to the way they are opened and closed. Roll-up curtains are curtains that are rolled up on a roll-up drum and opened and closed by rotating the roll-up drum; tension curtains are curtains that are hung from the top of the curtain through a hanging ring and opened and closed by tensioning. Roll-up curtains have a simple structure and are hidden after being rolled up, making them popular with users. They are widely used in many places such as office buildings and homes.
[0003] However, roll-up curtains are generally rolled up, and the rolled-up curtains are stored in the top of the window, which requires the control mechanism to be lowered. Therefore, general roll-up curtains are often controlled in the form of pull beads, and the ring-shaped pull beads have certain hidden dangers due to their ring structure, especially when children are playing indoors, there may be problems of hooking or hanging. In addition, the curtain rolling technology in the prior art generally controls the forward and reverse pulling of the pull beads and other operating mechanisms to realize the forward or reverse rotation of the roller tube. Utility Model Content
[0004] In view of the prior art, the utility model proposes a pull rod type semi-automatic curtain system, which realizes automatic lowering of curtains and manual folding of curtains by setting a pull rod operating mechanism in cooperation with a lifting clutch mechanism, and the operation is simple and practical.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a pull-rod type semi-automatic curtain system, including a roller shutter box and a curtain, a winding mechanism for rolling up the curtain is arranged in the roller shutter box, the winding mechanism includes a roller tube for winding the curtain, a lifting clutch mechanism respectively arranged at both ends of the roller tube, and a semi-automatic pull-rod control assembly connected to the winding mechanism for manually controlling the lifting and lowering of the curtain, the lifting clutch mechanism is used to drive the semi-automatic pull-rod control assembly to perform a rotation clutch switch to control the unidirectional rotation limit of the roller tube to control the suspension of the curtain or the winding out with its own weight, the semi-automatic pull-rod control assembly includes a pull-rod handle, a pull rope with one end fixed in the pull-rod handle, and the other end of the pull rope is connected to a winding wheel with a winding spring for automatically winding the pull rope.
[0006] As a further configuration of the above scheme, the lifting and engaging mechanism includes a sleeved inner shell, a rotating sleeve and a rotating rod, an axially extending guide groove is arranged in the inner shell, the rotating sleeve is sleeved on the rotating rod and arranged between the two, a torsion spring is also sleeved on the rotating rod, one end of the torsion spring is axially inserted and fixed on the rotating sleeve, a ball groove is arranged on the outer side surface of the rotating sleeve, and also includes a ball member rolling in the guide groove and the ball groove, the ball groove is annular and its extended branch is provided with at least one limit groove, which is used for the ball member to stay and lock the rotating sleeve to rotate relative to one side of the inner shell.
[0007] As a further configuration of the above solution, the torsion spring sleeve is arranged on the rotating rod and extends axially and spirally, and the spiral direction thereof is consistent with the rotation direction of the rotating sleeve when the cord is rolled out by the winding tube.
[0008] As a further configuration of the above scheme, the ball groove is provided with a plurality of guide blocks relative to the limit groove, and the guide blocks are used to guide the ball member from the ball groove to the limit groove, thereby forming a circumferential rotation limit on the winding tube in the direction of releasing the curtain fabric.
[0009] As a further configuration of the above scheme, the pull rod handle includes a pulling outer handle and a hollow inner tube, and the pull rope is fixedly connected to the pulling outer handle. When the pulling outer handle is pulled away from the hollow inner tube and the winding tube, the pull rope is pulled out from the winding wheel and the winding wheel spring is compressed to obtain an automatic rope winding elastic force.
[0010] As a further configuration of the above scheme, the winding wheel is connected with a one-way clutch assembly, and the one-way clutch assembly includes a planetary gear set, the central axis of the planetary gear set is connected to a sleeve block which is circumferentially fixed to the winding tube, and an axial gear sleeve which is circumferentially fixed to the central axis is arranged in the sleeve block, and the axial gear sleeve can be circumferentially rotated relative to the sleeve block, and the axial gear sleeve is also provided with a limit block which elastically abuts against the axial gear sleeve, and the limit block is circumferentially fixed to the sleeve block.
[0011] Beneficial effects: The pull-rod type semi-automatic curtain system of the utility model is controlled by the handle of the semi-automatic pull-rod control assembly through the arrangement of a semi-automatic winding mechanism. The winding and unwinding of the curtain can be controlled by multiple light and heavy pulls. The lifting and clutch control is realized by a simple torsion spring and a ball clutch structure. Compared with the prior art, it does not require a pull-bead arrangement, is more beautiful and safer, and the automatic winding and hovering switching of the curtain can be realized through the lifting and clutch mechanism. The operation is simple and practical, which fully meets the user's needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the curtain structure of the utility model.
[0013] Figure 2 It is a schematic diagram of the lifting and engaging mechanism of the curtain fabric of the utility model.
[0014] Figure 3 It is a schematic diagram of the ball groove and rotating sleeve structure of the lifting clutch mechanism of the utility model.
[0015] Figure 4 It is a schematic diagram of the one-way clutch component of the utility model.
[0016] Figure 5 It is a schematic diagram of the cooperation of the one-way clutch assembly of the utility model.
[0017] Figure 6 This is a schematic diagram of a semi-automatic pull rod control assembly of the utility model.
[0018] 1. Roller shutter box; 2. Curtain cloth; 3. Winding mechanism; 4. Semi-automatic pull rod control assembly; 41. Pull rod handle; 411. Pull outer handle; 412. Hollow inner tube; 42. Pull rope; 43. Winding wheel; 44. One-way clutch assembly; 441. Planetary gear set; 442. Middle shaft; 45. Sleeve block; 451. Axial gear sleeve; 452. Limit block; 453. Circumferential block; 454. Axial slot; 5. Lifting clutch mechanism; 51. Inner shell; 52. Rotating sleeve; 53. Guide groove; 54. Ball bearing; 55. Limit groove; 56. Guide block; 57. Rotating rod; 58. Ball groove; 59. Torsion spring. DETAILED DESCRIPTION
[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0020] like Figure 1-6 A pull-rod type semi-automatic curtain system of the present embodiment shown includes a roller shutter box 1 and a curtain 2, wherein a winding mechanism 3 for winding the curtain 2 is arranged in the roller shutter box 1, wherein the winding mechanism 3 includes a roller tube for winding the curtain 2, a lifting clutch mechanism 5 respectively arranged at both ends of the roller tube, and a semi-automatic pull-rod control component 4 connected to the winding mechanism 3 for manually controlling the lifting of the curtain 2, wherein the lifting clutch mechanism 5 is used to drive the semi-automatic pull-rod control component 4 to perform a rotation clutch switching to control the unidirectional rotation limit of the roller tube so that the curtain 2 is suspended or rolled out with its own weight, wherein the semi-automatic pull-rod control component 4 includes a pull-rod handle 41, a pull rope 42 with one end fixed in the pull-rod handle 41, and the other end of the pull rope 42 is connected to a winding wheel 43 with a winding spring for automatically winding the pull rope 42.
[0021] Furthermore, the lifting clutch mechanism 5 includes a sleeved inner shell 51 and a rotating sleeve 52, and a rotating rod 57. An axially extending guide groove 53 is arranged in the inner shell 51. The rotating sleeve 52 is sleeved on the rotating rod 57 and arranged between the two. A torsion spring 59 is also sleeved on the rotating rod 57. One end of the torsion spring 59 is axially inserted and fixed on the rotating sleeve 52. A ball groove 58 is arranged on the outer side of the rotating sleeve 52, and also includes a ball member 54 rolling in the guide groove 53 and the ball groove 58. The ball groove 58 is annular and its extended branch is provided with at least one limit groove 55, which is used for the ball member 54 to stay and lock the rotating sleeve 52 to rotate relative to one side of the inner shell 51.
[0022] Furthermore, the torsion spring 59 is sleeved on the rotating rod 57 and extends axially in a spiral direction, and its spiral direction is consistent with the rotation direction of the rotating sleeve 52 when the curtain 2 is rolled out by the winding tube. Through the limited setting of the spiral direction, when the curtain 2 is rolled out due to its own gravity, the torsion spring 59 is tightened so that the rotating sleeve 52 clamps the rotating rod 57, thereby achieving continuous winding or suspension through the different positions of the ball member 54 in the limit groove 55 and the ball groove 58.
[0023] Furthermore, the ball groove 58 is provided with a plurality of guide blocks 56 relative to the limit groove 55, and the guide blocks 56 are used to guide the ball member 54 from the ball groove 58 to the limit groove 55, so as to limit the circumferential rotation of the winding tube in the direction of releasing the curtain fabric 2.
[0024] Furthermore, the pull rod handle 41 includes a pulling outer handle 411 and a hollow inner tube 412, and the pull rope 42 is fixedly connected to the pulling outer handle 411. When the pulling outer handle 411 is pulled away from the hollow inner tube 412 and the winding tube, the pull rope 42 is pulled out from the winding wheel 43 and the winding spring of the winding wheel 43 is compressed to obtain an automatic rope winding elastic force.
[0025] Furthermore, the winding wheel 43 is connected to a one-way clutch assembly 44, and the one-way clutch assembly 44 includes a planetary gear set 441. The central axis 442 of the planetary gear set 441 is connected to a sleeve block 45 which is circumferentially fixed to the winding tube, and an axial gear sleeve 451 which is circumferentially fixed to the central axis 442 is arranged in the sleeve block 45. The axial gear sleeve 451 can be circumferentially rotatable relative to the sleeve block 45. The axial gear sleeve 451 is also provided with a limit block 452 which elastically abuts against the axial gear sleeve 451, and the limit block 452 is circumferentially fixed to the sleeve block 45.
[0026] Through the arrangement of the above structure, a pull rod type semi-automatic curtain system of this embodiment mainly includes a roller shutter box 1 and a curtain fabric 2, such as Figure 2 and Figure 4A winding mechanism 3 for winding up the curtain 2 is arranged in the rolling box 1, and the winding mechanism 3 includes a winding tube for winding up the curtain 2. The winding tube is used as a winding shaft for the curtain 2, and the prior art can be referred to. The winding mechanism 3 of this embodiment realizes semi-automatic winding, and a lifting clutch mechanism 5 for controlling the descent and hovering action of the curtain 2 and a semi-automatic pull rod control component 4 connected to the winding mechanism 3 for manually controlling the lifting of the curtain 2 are also arranged at both ends of the winding tube;
[0027] like Figure 2-3 As shown, the lifting clutch mechanism 5 of this embodiment is driven by the semi-automatic pull rod control component 4 to perform rotation clutch switching to drive the winding curtain 2 of the winding tube. In addition, the semi-automatic pull rod control component 4 can also control the pulling amplitude, thereby realizing the unidirectional rotation limit of the winding tube (the limit of the rotation of the curtain 2 in the descending direction) based on the structural setting of the lifting clutch mechanism 5, so as to control the suspension of the curtain 2. On the contrary, after the limit is released, the curtain 2 is rolled out based on the counterweight rod and its own weight, and based on the cooperation of the winding tube, the inner circumferential fixed sleeve block 45 and the screw rod with reference to the prior art, it is rolled out at a uniform speed.
[0028] like Figure 6 As shown, the semi-automatic rod control assembly 4 of this embodiment includes a rod handle 41, a rope 42 with one end fixed in the rod handle 41, and the other end of the rope 42 is connected to a winding wheel 43 with a winding spring that automatically winds the rope 42.
[0029] As a further setting of the above scheme, Figure 2-3 As shown, the lifting clutch mechanism 5 of this embodiment includes a sleeved inner shell 51 and a rotating sleeve 52, wherein with reference to the structure of the inner shell 51 in the prior art, a raised rib is provided on the outer surface of the inner shell 51 to match the raised rib provided on the inner side of the reel to be clamped and fixed circumferentially, and the rotating sleeve 52 is as shown in FIG. Figure 3As shown, it is arranged in the inner hole of the inner shell 51 and is circumferentially movable relative to the inner shell 51. A torsion spring 59 is also sleeved on the rotating rod 57. One end of the torsion spring 59 is axially plugged on the rotating sleeve 52 and fixedly arranged. The torsion spring 59 is sleeved on the rotating rod 57 and extends axially spirally. The spiral direction is consistent with the rotation direction of the rotating sleeve 52 when the curtain 2 is rolled out by the winding tube. It is worth noting that: an axially extending guide groove 53 is arranged in the inner shell 51 of this embodiment, and a ball groove 58 is arranged on the outer surface of the rotating sleeve 52, and also includes a guide groove 53 located at the guide groove. The ball member 54 rolling in the groove 53 and the ball groove 58 is arranged as described above. When installed, the ball member 54 is located in the ball groove 58 and the guide groove 53. The spherical ball member 54 is located in the ball groove 58 and the guide groove 53 and rolls therein. Based on the extension position change of the guide groove 53 and the ball groove 58, the ball member 54 continuously rolls and moves along the notch formed by the intersection of the two as the two rotate relative to each other. Furthermore, the ball groove 58 is annular and its extension branch is provided with at least one limit groove 55, such as Figure 3 As shown, the limiting groove 55 extends from the side of the annular ball groove 58 for a section and then extends back into the ball groove 58 in the reverse direction, and a guide block 56 is provided to separate the two. From the perspective of the circumferential extension relationship, when the ball member 54 rolls along the ball groove 58, based on the S-shaped annular extension structure of the ball groove 58 in the circumferential direction, when encountering the guide block 56, it will be guided by it to enter the branched limiting groove 55, and there is a groove opening matching the ball member 54 in the limiting groove 55. After entering the groove opening, the ball member 54 cannot move, so that the rotating sleeve 52 will rotate based on the circumferential linkage between the ball member 54 and the inner shell 51, and based on the spiral direction setting of the torsion spring 59 with one end axially inserted on the end face of the rotating sleeve 52, the rotation of the rotating sleeve 52 will drive one end of the torsion spring 59 to rotate with the rotating sleeve 52, and the rotation direction The torsion spring 59 is rotated in the opposite direction to the spiral direction of the torsion spring 59, and the other end of the torsion spring 59 is not fixed. Therefore, the rotating sleeve 52 will rotate with the torsion spring 59 relative to the rotating rod 57. At this time, the ball member 54 is located at c of the limiting groove 55. If at this time, the inner shell 51 rotates in the opposite direction (the pull rod is loosened and the curtain 2 falls to form a reverse force), the ball member 54 will move to d. At this time, the inner shell 51 is also fixed circumferentially relative to the rotating sleeve 52, but the rotation direction of the torsion spring 59 is the spiral direction. At this time, the rotation of the inner shell 51 and the rotating sleeve 52 will drive the torsion spring 59 to tighten. Based on the torsion spring 59 being sleeved on the rotating rod 57, the torsion spring 59 tightened toward the center will tightly clamp the rotating rod 57, and the tightening force is greater than the rotational force, so that the rotating sleeve 52 is stuck relative to the rotating rod 57, so that the inner shell 51 and the winding tube are stuck, and the curtain 2 is suspended.
[0030] Through the above-mentioned structural arrangement, the moving state of the ball member 54 of the lifting clutch mechanism 5 of this embodiment in the ball groove 58 and the limit groove 55 is as follows (this embodiment is described by taking the rotating rod 57 as an example and fixing it, combined with Figure 3 :
[0031] ① When the curtain 2 is rolled out, the ball moves along the ball groove 58 extending in the S-shaped ring of aea ( Figure 3 At this time, the roller tube rotates relative to the roller shutter box 1, and the curtain 2 is rolled out and unfolded. At this time, the rotating sleeve 52 is circumferentially fixed based on the torsion spring 59 and the rotating rod 57, and the roller tube and the inner shell 51 rotate circumferentially relative to the rotating sleeve 52;
[0032] ② During the process of rolling out the curtain 2, when the curtain 2 drops to the predetermined position, the user pulls down the semi-automatic pull rod control component 4, and the semi-automatic pull rod control component 4 drives the winding tube to rotate in the opposite direction. It is worth noting that at this time, the control of the semi-automatic pull rod control component 4 has two states (the control state is determined mainly based on the pulling force control, and the rolling distance of the ball member 54 of the lifting clutch mechanism 5 is used to realize the two states, that is, the ball member 54 rolls to the appropriate position, and the position is described as follows). The ball member 54 moves downward under the drive of the reversed winding tube, and in the downward process, the ball member 54 will move downward in the following manner. Figure 3 When the ball groove 58 is at the upper a, the guide block 56 facing the ab section of the ball groove 58 channel will guide the ball member 54 rolling from above to the b channel to leave the ball groove 58 and enter the branch limit groove 55. There will be two states here (that is, the above-mentioned: the control of the semi-automatic pull rod control component 4 has two states). One is that the pulling force is not enough and the ball member 54 does not enter the c. At this time, after losing the pulling force, the ball member 54 will return to the ball groove 58 along the inclined surface of b and restore the ① state; the second is that the pulling force is sufficient, and the ball member 54 rolls to c. At this time, the pulling force is lost again, and the ball member 54 will be based on cd, and the corresponding guide block 56 will enter the groove mouth at d and get stuck at d. In this state, the winding tube will be fixed circumferentially and the curtain 2 will be suspended;
[0033] The winding tube is fixed in the circumferential direction and cannot rotate, so that the curtain 2 is suspended. This is achieved by combining the rotating rod 57, the rotating sleeve 52 and the torsion spring 59. The torsion spring 59 is sleeved on the rotating rod 57, and its inner diameter is slightly smaller than the diameter of the rotating rod 57. It has a certain elastic expansion during the sleeve process, and the spiral direction is designed. The inner shell 51 drives the ball member 54 according to the example Figure 3, when rolling from bottom to top, it is in the same direction as its spiral direction. Based on the fact that the torsion spring 59 is spirally wound on the rotating rod 57 for multiple turns, when the rotating sleeve 52 rotates along its spiral direction, it will drive the torsion spring 59 to rotate. Based on the same spiral direction of the two, that is, one end of the torsion spring 59 is subjected to external force to spiral positively, while the other end is clamped on the rotating rod 57 based on elastic contraction. Based on the length design, the external force cannot be transmitted to the other end, which also causes the other end of the torsion spring 59 of the positive spiral to be regarded as fixed. When the one end fixed on the rotating sleeve 52 rotates, it will shrink, thereby greatly increasing the friction force and forming a circumferential fixation. On the contrary, the reverse spiral will drive the torsion spring 59 to expand, thereby enlarging the gap with the rotating rod 57, and releasing the clamping and fixing friction force of the other end based on its own elastic force, so that it rotates with the rotating sleeve 52 relative to the rotating rod 57 after it is not fixed, so that when the ball member 54 is located at the c groove, the ball member 54 is stuck, and it can still continue to drive the reel to rotate. When it is at d, the ball member 54 is stuck, and the reel is stuck accordingly;
[0034] As described above, when the lifting clutch mechanism 5 is in state ②, the curtain 2 is suspended. At this time, by pulling the semi-automatic pull rod control component 4 again, the two selection states of ② will also be triggered. In fact, the control state of the semi-automatic pull rod control component 4 in this embodiment includes light pulling and heavy pulling. Through the rolling of the lifting clutch mechanism 5 in the ball groove 58 and the limit groove 55, two different results appear;
[0035] That is, the moving path of the ball member 54 includes: 1) Figure 3 The roll-out state of aea rolling from bottom to top; 2) Figure 3 The ball bearing 54 is retracted and suspended along the abcd stuck state; 3) in the state 2), the ball bearing 54 is released from the suspended state along the dea and enters the unwinding state 1); or after retracting a section of the curtain fabric 2, it enters the continued suspended state 2 again;
[0036] Furthermore, the pulling rod handle 41 includes a pulling outer handle 411 and a hollow inner tube 412, and the pulling rope 42 is fixedly connected to the pulling outer handle 411. When the pulling outer handle 411 is pulled away from the hollow inner tube 412 and the winding tube, the pulling rope 42 is pulled out from the winding wheel 43 and the winding spring of the winding wheel 43 is compressed to obtain an automatic rope winding elastic force. After releasing the pulling outer handle 411, the winding spring drives the winding wheel 43 to reel in the pulling rope 42.
[0037] Furthermore, the winding wheel 43 is connected to a one-way clutch assembly 44, and the one-way clutch assembly 44 includes a planetary gear set 441. The central axis 442 of the planetary gear set 441 is connected to a sleeve block 45 which is circumferentially fixed to the winding tube, and an axial gear sleeve 451 which is circumferentially fixed to the central axis 442 is arranged in the sleeve block 45. The axial gear sleeve 451 can be circumferentially rotatable relative to the sleeve block 45. The axial gear sleeve 451 is also provided with a limit block 452 which elastically abuts against the axial gear sleeve 451, and the limit block 452 is circumferentially fixed to the sleeve block 45.
[0038] Through the above-mentioned structural arrangement, when rotating in one direction, the axial gear sleeve 451 is opposite to the tooth bevel on the limit block 452, and the limit block 452 is axially extended and contracted relative to the axial gear sleeve 451 based on the spring, thereby realizing relative rotation of the two. Conversely, the tooth planes of the two are opposite, and the outer ring of the limit block 452 is also provided with a circumferential clamping block 453 which is circumferentially fixed with the axial clamping groove 454 on the sleeve clamping block 45, so that the limit block 452, the axial gear sleeve 451, the sleeve clamping block 45, the planetary gear set 441, and the winding wheel 43 all maintain circumferential linkage, and the winding tube is circumferentially fixed based on the sleeve clamping block 45. Therefore, by pulling the pull rope 42 to drive the winding wheel 43 to rotate, the winding tube can be driven to rotate in one direction (the direction of releasing the line), while the winding wheel 43 does not produce any action in the other rotation direction (the direction of taking up the line).
[0039] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A pull rod type semi-automatic curtain system, characterized in that: The invention comprises a rolling box (1) and a curtain (2), wherein a winding mechanism (3) for winding up the curtain (2) is arranged in the rolling box (1), wherein the winding mechanism (3) comprises a winding tube for winding up the curtain (2), a lifting clutch mechanism (5) respectively arranged at both ends of the winding tube, and a semi-automatic pull rod control assembly (4) connected to the winding mechanism (3) for manually controlling the lifting of the curtain (2), wherein the lifting clutch mechanism (5) is used to drive the semi-automatic pull rod control assembly (4) to perform a rotation clutch switching to control the unidirectional rotation limit of the winding tube so that the curtain (2) is suspended or rolled out with its own weight, wherein the semi-automatic pull rod control assembly (4) comprises a pull rod handle (41), a pull rope (42) one end of which is fixed in the pull rod handle (41), and the other end of the pull rope (42) is connected to a winding wheel (43) with a winding spring for automatically winding the pull rope (42).
2. A pull rod type semi-automatic curtain system according to claim 1, characterized in that: The lifting clutch mechanism (5) comprises a sleeved inner shell (51), a rotating sleeve (52) and a rotating rod (57); an axially extending guide groove (53) is arranged in the inner shell (51); the rotating sleeve (52) is sleeved on the rotating rod (57) and arranged between the two; a torsion spring (59) is sleeved on the rotating rod (57); one end of the torsion spring (59) is axially inserted on the rotating sleeve (52) and fixedly arranged; a ball groove (58) is arranged on the outer side of the rotating sleeve (52); and a ball member (54) rolling in the guide groove (53) and the ball groove (58); the ball groove (58) is annular and its extended branch is provided with at least one limit groove (55) for the ball member (54) to stay and lock the rotating sleeve (52) to rotate relative to one side of the inner shell (51).
3. A pull rod type semi-automatic curtain system according to claim 2, characterized in that: The torsion spring (59) is sleeved on the rotating rod (57) and extends axially in a spiral direction, and its spiral direction is consistent with the rotation direction of the rotating sleeve (52) when the curtain (2) is rolled out by the winding tube.
4. The pull-rod type semi-automatic curtain system according to claim 2, characterized in that: The ball groove (58) is provided with a plurality of guide blocks (56) relative to the limit groove (55), and the guide blocks (56) are used to guide the ball member (54) from the ball groove (58) to the limit groove (55), so as to form a circumferential rotation limit in the direction of the winding tube releasing the curtain fabric (2).
5. The pull-rod type semi-automatic curtain system according to claim 1, characterized in that: The pull rod handle (41) comprises a pulling outer handle (411) and a hollow inner tube (412), and the pulling rope (42) is fixedly connected to the pulling outer handle (411). When the pulling outer handle (411) is pulled in a direction away from the hollow inner tube (412) and the winding tube, the pulling rope (42) is pulled out from the winding wheel (43) and the winding spring of the winding wheel (43) is compressed to obtain an automatic rope winding elastic force.
6. A pull rod type semi-automatic curtain system according to claim 5, characterized in that: The winding wheel (43) is connected to a one-way clutch assembly (44), and the one-way clutch assembly (44) includes a planetary gear set (441). The central axis (442) of the planetary gear set (441) is connected to a sleeve block (45) that is circumferentially fixed to the winding tube, and an axial gear sleeve (451) that is circumferentially fixed to the central axis (442) is arranged in the sleeve block (45), and the axial gear sleeve (451) is circumferentially rotatable relative to the sleeve block (45). The axial gear sleeve (451) is also provided with a limit block (452) that elastically abuts against the axial gear sleeve (451), and the limit block (452) is circumferentially fixed to the sleeve block (45).