Interlocking pulley and curtain machine

Abstract

The present invention discloses an interlocking pulley and a curtain machine. When the rotation speeds of the first transmission member and the second transmission member of the interlocking pulley are different, the first transmission member and the second transmission member move away from each other, and at the same time, the first transmission member is connected to the dimming pendant through transmission, and the second transmission member is locked with the frame. In this way, when the synchronous belt driving the second transmission member does not work, the second transmission member and the frame are kept fixed at the same time, ensuring that the frame will not move on the guide rail of the curtain machine, thereby realizing stable opening and closing and flipping of the curtain pieces. The curtain machine adopts the interlocking pulley, and the working process is more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of curtain machines, and in particular to an interlocking pulley and a curtain machine. Background Art

[0002] A curtain machine is a machine that can electrically control the movement of a curtain. A vertical curtain machine (hereinafter referred to as a curtain machine) has multiple curtain pieces. The opening and closing of the curtain is achieved by adjusting the position of the curtain pieces, and the light transmission angle of the curtain is adjusted by turning the curtain pieces to different angles. In order to achieve a curved track for the curtain machine, a dual-belt drive method is currently used, such as the prior art with publication numbers CN216060124U and CN217300418U.

[0003] The current double-belt electric vertical curtain machine includes a curtain machine guide rail, wherein a plurality of movable pulleys (such as a double-belt pulley with publication number CN217300418U) are arranged in the curtain machine guide rail, wherein the pulley has a first transmission member and a second transmission member, wherein a differential clutch structure is formed between the first transmission member and the second transmission member, wherein the first transmission member is drivingly connected to a first transmission belt in the curtain machine guide rail, and the second transmission member is drivingly connected to a second transmission belt in the curtain machine guide rail;

[0004] The second transmission belt is fixedly connected to the first pulley, and the other pulleys are non-fixedly connected to the second transmission belt. When the curtain piece needs to be closed, the second transmission belt works, and the first pulley is driven by the second transmission belt to move in the guide rail of the curtain machine, and the first pulley pushes the other pulleys to move, thereby realizing the closing of the curtain piece; when the curtain piece needs to be unfolded, the first pulley moves and drives the next pulley to move through the distance piece, and the next pulleys move one by one through the distance piece, thereby realizing the unfolding of the curtain piece; in addition, the first transmission belt is non-fixedly connected to all the pulleys;

[0005] The following problems sometimes occur during application: when the curtain needs to be flipped, the second transmission belt does not move, and only the first transmission belt moves. At this time, the pulleys except the first pulley will move along the guide rail of the curtain machine; and the moving distance of each pulley is also different, presenting an irregular and unstable working process; in addition, part of the power of the first transmission belt is used for the movement of the pulley, which reduces the flipping power obtained by the curtain and affects the flipping effect; the inventor is committed to solving the above technical problems. Summary of the invention

[0006] In view of this, the present invention provides an interlocking pulley and a curtain machine, which can solve one of the above problems to at least a certain extent.

[0007] The technical solution of one aspect of the present invention is achieved as follows:

[0008] An interlocking pulley, comprising:

[0009] A frame, wherein a limiting shaft is disposed on the frame, a rotatable dimming pendant is also disposed on the frame, and a first circumferential transmission part is disposed on the dimming pendant; and

[0010] A first transmission member and a second transmission member slidably sleeved on the limiting shaft, wherein a differential clutch structure is formed between the first transmission member and the second transmission member;

[0011] A first card insertion portion is provided on one end of the second transmission member away from the first transmission member, and a second card insertion portion corresponding to and plugged into the first card insertion portion is provided on the frame;

[0012] When the first transmission member and the second transmission member rotate at different speeds, the first transmission member and the second transmission member move axially and away from each other, so that the first transmission member is in transmission connection with the first circumferential transmission part, thereby driving the dimming pendant to rotate; and the first plug-in portion of the second transmission member is plugged into the second plug-in portion of the frame, thereby achieving relative fixation of the frame and the second transmission member;

[0013] When the first transmission member and the second transmission member rotate at the same speed, the first transmission member and the second transmission member are driven to approach each other by the reset mechanism, so that the first transmission member is separated from the first circumferential transmission part, and the first card insertion part is separated from the second card insertion part.

[0014] As a further optional scheme for the interlocking pulley, the differential clutch structure includes a differential block and a differential hole, and the differential block and the differential block are respectively arranged at eccentric positions of the end face of one of the first transmission member and the second transmission member, and the two end faces of the differential block along the rotation direction are inclined surfaces; the structure and position of the differential hole correspond to the differential block; when the rotation speeds of the first transmission member and the second transmission member are different, under the guiding action of the inclined surface, the differential block disengages from the differential hole, and the first transmission member and the second transmission member move away from each other.

[0015] As a further optional solution of the interlocking pulley, the reset mechanism includes a plurality of first magnets provided on the first transmission member and a plurality of second magnets provided on the second transmission member, and when the positions of the first magnets correspond to those of the second magnets, the differential block is inserted into the differential hole.

[0016] As a further optional scheme for the interlocking pulley, it also includes a third transmission member, which is rotatably arranged on the frame and coaxially arranged with the limit shaft; the outer periphery of the third transmission member is provided with a second circumferential transmission part which is transmission-connected to the first circumferential transmission part, and the first circumferential transmission part and the second circumferential transmission part are both a plurality of transmission teeth arranged along the circumferential direction; a first meshing structure is provided on the end face of the first transmission member close to the third transmission member, and a second meshing structure is provided on the end face of the third transmission member close to the first transmission member; when the first transmission member moves axially and approaches the third transmission member, the first meshing structure contacts and meshes with the second meshing structure.

[0017] As a further optional solution of the interlocking pulley, the first meshing structure is a plurality of transmission teeth extending axially from one end of the first transmission member, and the second meshing structure is a plurality of transmission teeth extending axially from one end of the third transmission member, and the plurality of transmission teeth of the second meshing structure are arranged equidistantly in the circumferential direction;

[0018] A coaxially arranged first sliding member is provided in the first transmission member, and the first meshing structure is formed on the end surface of the first sliding member; a first channel for sliding of the first sliding member is provided in the first transmission member, and a first elastic member for driving the first sliding member away from the first transmission member is provided in the first channel; the first transmission member has a first blocking portion for limiting the maximum distance of the first sliding member away from the first transmission member.

[0019] As a further optional scheme for the interlocking pulley, a plurality of first elastic strips are provided on the first transmission member, and the plurality of first elastic strips are arranged at the entrance of the first channel in a circumferentially spaced arrangement. A first protrusion is radially protruded on the inner wall of the first elastic strip, and the first protrusion blocks the moving path of the first sliding member. The end surface of the first protrusion close to the first channel serves as the first blocking portion, and the end surface of the first protrusion away from the first channel is formed with a guide surface inclined from the outside to the inside.

[0020] As a further optional solution of the interlocking pulley, the first card insertion part is a plurality of transmission teeth extending from one end of the second transmission member in the circumferential direction, and the second card insertion part is a plurality of transmission teeth arranged equidistantly in the circumferential direction and provided on the frame; when the first card insertion part is plugged into the second card insertion part, the transmission teeth of the first card insertion part are inserted into the tooth groove between two transmission teeth of the second card insertion part;

[0021] A coaxially arranged second sliding member is provided in the second transmission member, and the first card insertion portion is formed on the end surface of the second sliding member; a second channel for sliding of the second sliding member is provided in the second transmission member, and a second elastic member for driving the first sliding member away from the second transmission member is provided in the second channel; the second transmission member is provided with a second blocking portion for limiting the maximum distance of the second sliding member away from the second transmission member.

[0022] As a further optional scheme for the interlocking pulley, a plurality of second elastic strips are provided on the second transmission member, and the plurality of second elastic strips are arranged at the entrance of the second channel in a circumferentially spaced arrangement. The inner wall of the second elastic strip is provided with a second protrusion in the radial direction. The second protrusion blocks the moving path of the second sliding member, and the end surface of the second protrusion close to the second channel serves as the second blocking portion, and the end surface of the second protrusion away from the second channel is formed with a guide surface inclined from the outside to the inside.

[0023] As a further optional scheme of the interlocking pulley, the first transmission member is provided with a third circumferential transmission part so as to be driven to rotate around the limit axis; the second transmission member is provided with a fourth circumferential transmission part so as to be driven to rotate around the limit axis.

[0024] The technical solution of another aspect of the present invention is achieved as follows:

[0025] A curtain machine comprises any one of the above-mentioned interlocking pulleys.

[0026] The beneficial effects of the present invention are as follows: when the rotational speeds of the first transmission member and the second transmission member of the interlocking pulley are different, the first transmission member and the second transmission member move away from each other, and at the same time, the transmission connection between the first transmission member and the dimming hanger is realized, and the locking of the second transmission member and the frame is realized; in this way, when the synchronous belt driving the second transmission member is not working, the second transmission member and the frame are kept fixed at the same time, ensuring that the frame will not move on the guide rail of the curtain machine, thereby realizing stable opening and closing and flipping of the curtain pieces; the curtain machine adopts the interlocking pulley, and the working process is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of an interlocking pulley;

[0029] Figure 2 for Figure 1 Explosion diagram of

[0030] Figure 3 is an exploded schematic diagram of the first transmission member and the second transmission member;

[0031] Figure 4 is a cross-sectional schematic diagram of an interlocking pulley;

[0032] Figure 5 is an exploded schematic diagram of the second transmission member and the second sliding member;

[0033] Figure 6 for Figure 4 A magnified view of middle;

[0034] Figure 7 is a schematic diagram of the structure when the second transmission member is locked in cooperation with the frame;

[0035] Figure 8 This is a schematic diagram of the structure in which the interlocking pulley is arranged in the guide rail of the curtain machine.

[0036] In the figure: 1, frame; 11, limiting shaft; 12, second card insertion portion; 13, second positioning plate; 14, first positioning plate;

[0037] 2. dimming pendant; 21. first circumferential transmission part;

[0038] 3. First transmission member; 31. Differential block; 32. Third circumferential transmission part; 33. First meshing structure; 34. First sliding member; 35. First elastic member;

[0039] 4. second transmission member; 41. differential hole; 42. fourth circumferential transmission portion; 43. first card insertion portion; 44. second sliding member; 45. second elastic member; 46. second elastic strip; 461. second protrusion; 462. second blocking portion;

[0040] 5. The third transmission member; 51. The second circumferential transmission portion; 52. The second meshing structure. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] After research, the inventor found that the reason why the pulley moves when driving the curtain flaps is that the pulleys other than the first pulley are not fixedly connected to the second transmission belt, and the friction between the pulley and the curtain machine guide rail is small; therefore, when the first transmission belt drives the first transmission member to rotate, even if the second transmission belt does not move, the power provided by the first transmission belt will drive the pulley to move in the curtain machine guide rail, and the second transmission member on the pulley will rotate to move along the non-moving second transmission belt; and since the friction of each pulley in the curtain machine guide rail is different, the distance moved by each pulley is also different, resulting in an irregular and unstable working process.

[0045] Therefore, an interlocking pulley is provided, referring to Figure 1-3 The interlocking pulley comprises a frame 1, on which a limit shaft 11 is provided, on which a rotatable dimming hanger 2 is provided, on which a first circumferential transmission part 21 is provided; a first transmission member 3 and a second transmission member 4 are slidably sleeved on the limit shaft 11, and a differential clutch structure is formed between the first transmission member 3 and the second transmission member 4; a first plug-in part 43 is provided on one end of the second transmission member 4 away from the first transmission member 3, and a second plug-in part 12 corresponding to and plugged with the first plug-in part 43 is provided on the frame 1. A third circumferential transmission part 32 is provided on the first transmission member 3, and a fourth circumferential transmission part 42 is provided on the second transmission member 4.

[0046] Among them, reference Figure 8, the interlocking pulley is placed in the curtain machine guide rail, and the curtain machine guide rail is provided with a first transmission belt and a second transmission belt, the first transmission belt is in transmission cooperation with the third circumferential transmission part 32 on the first transmission member 3, and the second transmission belt is in transmission cooperation with the axial transmission part on the second transmission member 4; conventionally, the first transmission belt and the second transmission belt can be synchronous belts, and the third circumferential transmission part 32 and the fourth circumferential transmission part 42 can be synchronous wheel structures; according to the double-belt drive structure with publication number CN112554765A or CN215634784U, it can be known that the first transmission belt can work alone, or the first transmission belt and the second transmission belt can work synchronously;

[0047] If the first transmission belt works alone, the first transmission member 3 rotates at a different speed from the second transmission member 4. Under the action of the differential clutch structure, the first transmission member 3 and the second transmission member 4 move axially and away from each other, so that the first transmission member 3 is connected to the first circumferential transmission part 21 to drive the dimming pendant 2 to rotate; wherein the first transmission member 3 and the first circumferential transmission part 21 can be directly connected or indirectly connected through an intermediate component; and the first plug-in portion 43 of the second transmission member 4 is plugged into the second plug-in portion 12 of the frame 1, and the state at this time is as follows: Figure 7 As shown, the frame 1 and the second transmission member 4 are relatively fixed, and the second transmission member 4 cannot rotate on the frame 1, that is, the second transmission member 4 cannot move along the second transmission belt, so that the first transmission belt cannot drive the frame 1 to move in the guide rail of the curtain machine; thereby achieving stable flapping of the curtain piece.

[0048] If the first transmission belt and the second transmission belt work synchronously, the first transmission member 3 rotates at the same speed as the second transmission member 4. Under the action of the differential clutch structure, the first transmission member 3 and the second transmission member 4 are driven by the reset mechanism to approach each other, so that the first transmission member 3 is separated from the first circumferential transmission part 21, and the first card insertion part 43 is separated from the second card insertion part 12. The state at this time is as follows: Figure 1 At this time, the second transmission member 4 can rotate on the frame 1, so that the frame 1 can move along the curtain machine guide rail to realize the opening and closing of the curtain piece.

[0049] Specifically, the first card insertion portion 43 and the second card insertion portion 12 can be a socket and a column respectively, so that the second transmission member 4 cannot rotate on the frame 1.

[0050] For details of the above scheme, please refer to Figure 3The differential clutch structure includes a differential block 31 and a differential hole 41, and the differential block 31 and the differential block 31 are respectively arranged at the eccentric position of the end face of one of the first transmission member 3 and the second transmission member 4, and the two end faces of the differential block 31 along the rotation direction are inclined surfaces; the structure and position of the differential hole 41 correspond to the differential block 31; when the first transmission member 3 and the second transmission member 4 have different rotation speeds, under the guiding action of the inclined surface, the differential block 31 escapes from the differential hole 41, and the first transmission member 3 and the second transmission member 4 move away from each other.

[0051] Specifically, the reset mechanism includes a plurality of first magnets (not marked in the figure) provided on the first transmission member 3 and a plurality of second magnets (not marked in the figure) provided on the second transmission member 4. When the positions of the first magnets and the second magnets correspond, the differential block 31 is inserted into the differential hole 41. The principle of magnetic reset can refer to the double-belt pulley with publication number CN217300418U; in addition, in other embodiments, elastic reset can also be used, for example, an elastic member is provided between the frame 1 and the first transmission member 3 and the second transmission member 4 to make the two members close to each other; the principle of elastic reset can refer to the prior art with publication number CN216060124U.

[0052] The above scheme is specific. In this embodiment, since the first transmission member 3 and the second transmission member 4 move away from each other and approach each other, in order to facilitate the first transmission member 3 and the second transmission member 4 to be stably located at a position after approaching each other, at which the first card insertion portion 43 is separated from the second card insertion portion 12, and the first transmission member 3 is separated from the first circumferential transmission portion 21; therefore, a corresponding structure should be provided as a reference so that the first transmission member 3 and the second transmission member 4 can be reset to the same position, refer to Figure 1 and Figure 7 A first positioning plate 14 and a second positioning plate 13 are provided on the frame 1, and the first transmission member 3 abuts against the first positioning plate 14 after being reset, and the second transmission member 4 abuts against the second positioning plate 13 after being reset; wherein, in order to avoid the first positioning plate 14 and the second positioning plate 13 providing too much friction force to hinder the rotation of the first transmission member 3 and the second transmission member 4, it is preferred to make the contact area between the first positioning plate 14 and the first transmission member 3, and between the second positioning plate 13 and the second transmission member 4 as small as possible.

[0053] In some specific implementations, in order to facilitate the first transmission member 3 to form a reliable transmission connection with the first circumferential transmission portion 21, refer to Figure 2 and Figure 3, further comprising a third transmission member 5, the third transmission member 5 being rotatably arranged on the frame 1 and being coaxially arranged with the limiting shaft 11; the outer periphery of the third transmission member 5 being provided with a second circumferential transmission part 51 being transmission-connected with the first circumferential transmission part 21, the first circumferential transmission part 21 and the second circumferential transmission part 51 both being a plurality of transmission teeth arranged along the circumferential direction; the first transmission member 3 being provided with a first meshing structure 33 on the end face close to the third transmission member 5, the third transmission member 5 being provided with a second meshing structure 52 on the end face close to the first transmission member 3; when the first transmission member 3 moves axially and approaches the third transmission member 5, the first meshing structure 33 is in contact and meshing with the second meshing structure 52. Wherein, the first circumferential transmission part 21 and the second circumferential transmission part 51 can both be gear structures.

[0054] There are some special cases where, when the first card insertion portion 43 is plugged into the second card insertion portion 12, the frame 1 is pushed by a strong external force. To avoid damage to the first card insertion portion 43 or the second card insertion portion 12, preferably, refer to Figure 2 and Figure 3 , the first card insertion portion 43 is a plurality of transmission teeth extending circumferentially from one end of the second transmission member 4, and the second card insertion portion 12 is a plurality of transmission teeth arranged equidistantly along the circumferential direction and provided on the frame body 1; when the first card insertion portion 43 is plugged into the second card insertion portion 12, the transmission teeth of the first card insertion portion 43 are inserted into the tooth groove between the two transmission teeth of the second card insertion portion 12; refer to Figure 4-6 , a coaxially arranged second sliding member 44 is provided in the second transmission member 4, and the first card insertion part 43 is formed on the end surface of the second sliding member 44; a second channel (not marked in the figure) is provided in the second transmission member 4 for the second sliding member 44 to slide, and a second elastic member 45 is provided in the second channel for driving the first sliding member 34 away from the second transmission member 4; the second transmission member 4 has a second blocking part 462 for limiting the maximum distance of the second sliding member 44 away from the second transmission member 4. In this way, the first card insertion part 43 is pushed by the second elastic member 45 and pressed on the second card insertion part 12. When the frame 1 is pushed by a strong external force, the second elastic member 45 will be compressed, and the first card insertion part 43 will have a "tooth jump" phenomenon on the second card insertion part 12, thereby preventing the first card insertion part 43 or the second card insertion part 12 from being broken or damaged.

[0055] Similarly, there are some special cases where the first meshing structure 33 is meshed with the second meshing structure 52, and the curtain piece on the dimming pendant 2 cannot rotate, for example, insufficient installation space causes the curtain piece to be too close to the wall, causing the wall to block the curtain piece from continuing to rotate; or for example, the curtain piece has been rotated to the limit angle; in order to avoid the first meshing structure 33 or the second meshing structure 52 being damaged when the first transmission belt continues to work; refer to Figure 4 , a first sliding member 34 is coaxially arranged in the first transmission member 3, and the first meshing structure 33 is formed on the end surface of the first sliding member 34; a first channel (not marked in the figure) is provided in the first transmission member 3 for the first sliding member 34 to slide, and a first elastic member 35 is provided in the first channel for driving the first sliding member 34 away from the first transmission member 3; the first transmission member 3 has a first blocking portion for limiting the maximum distance of the first sliding member 34 away from the first transmission member 3. Similarly, the first meshing structure 33 will have a "tooth jump" phenomenon on the second meshing structure 52 to prevent the first meshing structure 33 or the second meshing structure 52 from breaking or being damaged. The first elastic member 35 and the second elastic member 45 can be springs.

[0056] In the above scheme, the first sliding member 34 and the first channel, and the second sliding member 44 and the second channel can be a matching structure of a circular hole and a cylindrical hole. At this time, the first transmission member 3 drives the first sliding member 34 to rotate through the friction between the first blocking portion and the first sliding member 34, and the second transmission member 4 drives the second sliding member 44 to rotate through the friction between the second blocking portion 462 and the second sliding member 44; and preferably, the first sliding member 34 and the first channel, and the second sliding member 44 and the second channel are non-circular holes and non-cylinders (for example Figure 5 The first sliding member 34 and the first transmission member 3 are relatively fixed in the circumferential direction, and the second sliding member 44 and the second transmission member 4 are relatively fixed in the circumferential direction.

[0057] In some specific embodiments, for ease of assembly, reference is made to Figure 4-6 , the second transmission member 4 is provided with a plurality of second elastic strips 46, which are arranged at intervals along the circumferential direction at the entrance of the second channel, and the inner wall of the second elastic strip 46 is provided with a second protrusion 461 along the radial direction, and the second protrusion 461 blocks the moving path of the second sliding member 44, and the end surface of the second protrusion 461 close to the second channel serves as the second blocking portion 462, and the end surface of the second protrusion 461 away from the second channel is formed with a guide surface inclined from the outside to the inside. In this way, the second sliding member 44 can be directly snapped into the second channel;

[0058] Same, reference Figure 4 , the first transmission member 3 is provided with a plurality of first elastic strips (not marked in the figure), which are arranged at intervals along the circumferential direction at the entrance of the first channel, and the inner wall of the first elastic strip is provided with a first protrusion (not marked in the figure) protruding in the radial direction, and the first protrusion blocks the moving path of the first sliding member 34, and the end surface of the first protrusion close to the first channel serves as the first blocking part (not marked in the figure), and the end surface of the first protrusion away from the first channel is formed with a guide surface inclined from the outside to the inside. Among them, the installation method of the first sliding member 34 can refer to the second sliding member 44, so no drawings are provided for separate illustration.

[0059] It should also be noted that the above-mentioned interlocking pulley can achieve relative fixation of the second transmission member and the frame, thereby achieving fixation of the frame in the curtain machine guide rail; therefore, compared with the double-belt pulley with publication number CN217300418U, the limit blocks on the pulley can be reduced, and the complexity of the internal structure of the curtain machine guide rail is correspondingly reduced.

[0060] A curtain machine is also provided, comprising any one of the above-mentioned interlocking pulleys.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An interlocking pulley, characterized in that: include: A frame, wherein a limiting shaft is provided on the frame, a rotatable dimming pendant is also provided on the frame, and a first circumferential transmission part is provided on the dimming pendant; as well as A first transmission member and a second transmission member slidably sleeved on the limiting shaft, wherein a differential clutch structure is formed between the first transmission member and the second transmission member; A first card insertion portion is provided on one end of the second transmission member away from the first transmission member, and a second card insertion portion corresponding to and plugged into the first card insertion portion is provided on the frame; When the first transmission member and the second transmission member rotate at different speeds, the first transmission member and the second transmission member move axially and away from each other, so that the first transmission member is in transmission connection with the first circumferential transmission part, thereby driving the dimming pendant to rotate; and the first plug-in portion of the second transmission member is plugged into the second plug-in portion of the frame, thereby achieving relative fixation of the frame and the second transmission member; When the first transmission member and the second transmission member rotate at the same speed, the first transmission member and the second transmission member are driven to approach each other by the reset mechanism, so that the first transmission member is separated from the first circumferential transmission part, and the first card insertion part is separated from the second card insertion part.

2. The interlocking pulley according to claim 1, characterized in that: The differential clutch structure includes a differential block and a differential hole, wherein the differential block and the differential block are respectively arranged at eccentric positions of the end faces of one of the first transmission member and the second transmission member, and the two end faces of the differential block along the rotation direction are inclined surfaces; the structure and position of the differential hole correspond to the differential block; when the rotation speeds of the first transmission member and the second transmission member are different, under the guiding action of the inclined surface, the differential block disengages from the differential hole, and the first transmission member and the second transmission member move away from each other.

3. The interlocking pulley according to claim 2, characterized in that: The reset mechanism includes a plurality of first magnets disposed on the first transmission member and a plurality of second magnets disposed on the second transmission member. When the positions of the first magnets correspond to those of the second magnets, the differential block is inserted into the differential hole.

4. The interlocking pulley according to claim 1, characterized in that: It also includes a third transmission member, which is rotatably arranged on the frame and coaxially arranged with the limit shaft; the outer periphery of the third transmission member is provided with a second circumferential transmission part which is transmission-connected to the first circumferential transmission part, and the first circumferential transmission part and the second circumferential transmission part are both a plurality of transmission teeth arranged along the circumferential direction; a first meshing structure is provided on the end face of the first transmission member close to the third transmission member, and a second meshing structure is provided on the end face of the third transmission member close to the first transmission member; when the first transmission member moves axially and approaches the third transmission member, the first meshing structure contacts and meshes with the second meshing structure.

5. The interlocking pulley according to claim 4, characterized in that ； The first meshing structure is a plurality of transmission teeth extending axially from one end of the first transmission member, and the second meshing structure is a plurality of transmission teeth extending axially from one end of the third transmission member, and the plurality of transmission teeth of the second meshing structure are arranged equidistantly in the circumferential direction; A coaxially arranged first sliding member is provided in the first transmission member, and the first meshing structure is formed on the end surface of the first sliding member; a first channel for sliding of the first sliding member is provided in the first transmission member, and a first elastic member for driving the first sliding member away from the first transmission member is provided in the first channel; the first transmission member has a first blocking portion for limiting the maximum distance of the first sliding member away from the first transmission member.

6. The interlocking pulley according to claim 5, characterized in that: A plurality of first elastic strips are provided on the first transmission member, and the plurality of first elastic strips are arranged at the entrance of the first channel in an circumferentially spaced arrangement. A first protrusion is radially protruded on the inner wall of the first elastic strip, and the first protrusion blocks the moving path of the first sliding member. The end surface of the first protrusion close to the first channel serves as the first blocking portion, and the end surface of the first protrusion away from the first channel is formed with a guide surface inclined from the outside to the inside.

7. The interlocking pulley according to claim 5 or 6, characterized in that: The first card insertion part is a plurality of transmission teeth extending from one end of the second transmission member in the circumferential direction, and the second card insertion part is a plurality of transmission teeth arranged equidistantly in the circumferential direction and provided on the frame body; when the first card insertion part is inserted into the second card insertion part, the transmission teeth of the first card insertion part are inserted into the tooth groove between two transmission teeth of the second card insertion part; A coaxially arranged second sliding member is provided in the second transmission member, and the first card insertion portion is formed on the end surface of the second sliding member; a second channel for sliding of the second sliding member is provided in the second transmission member, and a second elastic member for driving the first sliding member away from the second transmission member is provided in the second channel; the second transmission member is provided with a second blocking portion for limiting the maximum distance of the second sliding member away from the second transmission member.

8. The interlocking pulley according to claim 7, characterized in that: The second transmission member is provided with a plurality of second elastic strips, which are arranged at the entrance of the second channel in a circumferentially spaced arrangement. The inner wall of the second elastic strip is provided with a second protrusion in the radial direction. The second protrusion blocks the moving path of the second sliding member. The end surface of the second protrusion close to the second channel serves as the second blocking portion, and the end surface of the second protrusion away from the second channel is formed with a guide surface inclined from the outside to the inside.

9. The interlocking pulley according to claim 1, characterized in that: The first transmission member is provided with a third circumferential transmission part for being driven to rotate around the limit axis; the second transmission member is provided with a fourth circumferential transmission part for being driven to rotate around the limit axis.

10. A curtain machine, characterized in that: An interlocking pulley comprising any one of claims 1-9.

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