Mechanical clutch mechanism and automatic curtain device

Abstract

The present invention discloses a mechanical clutch mechanism and an automatic curtain device, the automatic curtain device comprising: a driving member; a clamping member connected to the driving shaft of the driving member; a transmission member, the transmission member being provided with a plurality of first slots; a clutch push assembly provided on the transmission member; a pull ring connected to the clutch push assembly at one end, the clutch push assembly being driven to rotate by pulling the pull ring, and the clutch push assembly being pushed to disengage the clamping member from the first slot. In the present invention, in the event of a power outage, the clutch push assembly is driven to rotate by manually pulling the pull ring, so that the clutch push assembly pushes the clamping member to disengage from the first slot, and the pull ring drives the transmission member to rotate, thus achieving manual pulling of the curtain during a power outage and avoiding damage to the driving member by driving the driving shaft of the unpowered driving member to rotate.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic curtains, and in particular to a mechanical clutch mechanism and an automatic curtain device. Background Art

[0002] At present, electric automatic curtains are widely used, but some electric curtains are not equipped with a manual curtain opening and closing device, and the curtains cannot be opened and closed when there is a power outage or the electric device is damaged. Although some electric curtains also have a pull ring and other manual curtain opening and closing mechanisms, the current automatic curtains are usually electromagnetically driven. In the case of a power outage or the drive motor cannot be used, the pull ring is manually pulled to force the worm of the automatic curtain to rotate, which will force the drive shaft of the drive device to rotate synchronously, while the drive device is not powered on, which is easy to damage the drive device.

[0003] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a mechanical clutch mechanism and an automatic curtain device in view of the deficiencies in the prior art, so as to solve the problem that the driving device of the automatic curtain in the prior art is easily damaged when the curtain is manually drawn during a power outage.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A mechanical clutch mechanism, comprising:

[0007] Driving parts;

[0008] A clamping member, the clamping member being connected to a driving shaft of the driving member;

[0009] A transmission member, wherein the transmission member is provided with a plurality of first slots adapted to the engaging member;

[0010] A clutch pushing assembly, wherein the clutch pushing assembly is disposed on the transmission member; and

[0011] A pull ring, one end of which is connected to the clutch push assembly, and the clutch push assembly is driven to rotate by pulling the pull ring, so that the clutch push assembly pushes the engaging member to disengage from the first slot and drives the transmission member to rotate.

[0012] The mechanical clutch mechanism, wherein the clutch push component comprises:

[0013] A top holding member, the top holding member is sleeved on the transmission member, and the top holding member is provided with a plurality of second slots;

[0014] A claw-type engaging member, which is sleeved on the transmission member and located outside the supporting member;

[0015] One end of the pull ring is connected to the claw-type engaging member, and the claw-type engaging member is engaged and connected with the top holding member by pulling the pull ring, and drives the top holding member to rotate and move along the length direction of the transmission member to push the transmission member out of the first slot.

[0016] The mechanical clutch mechanism, wherein the transmission member is provided with a plurality of first protrusions, and the plurality of first protrusions are located on one side of the supporting member;

[0017] A plurality of arc-shaped grooves are arranged on one side of the supporting member facing the first protrusion, and the plurality of arc-shaped grooves correspond to the plurality of first protrusions one by one;

[0018] When the pull ring is not pulled, the engaging member is engaged in the first engaging groove, and the engaging member supports the supporting member so that the first protrusion is located at the bottom of the corresponding arc groove.

[0019] The mechanical clutch mechanism, wherein limiting columns are provided at the two top ends of each of the arc-shaped grooves, and the limiting columns are used to abut against the first protrusion after the first protrusion slides to the top end along the arc-shaped groove, so that the transmission member and the supporting member move synchronously.

[0020] The mechanical clutch mechanism, wherein the top holding member is provided with a plurality of second slots, and the plurality of second slots are arranged at intervals along the circumference of the top holding member;

[0021] The claw-type engaging member includes an annular sleeve portion and a plurality of engaging rods connected to one side of the annular sleeve portion, the plurality of engaging rods are arranged in an annular shape along one side edge of the annular sleeve portion, and the plurality of engaging rods correspond to the plurality of second slots one by one.

[0022] The mechanical clutch mechanism, wherein the outer side surface of each of the engaging rods is provided with an engaging portion;

[0023] The pull ring is provided with a plurality of clamping holes at intervals along the length direction of the pull ring. The clamping part is embedded in the clamping hole by pulling the pull ring, and the clamping rod is embedded in the second clamping groove.

[0024] The mechanical clutch mechanism, wherein a limit ring is arranged on the transmission member along the circumference of the transmission member, and the limit ring is located on a side of the supporting member facing away from the engaging member;

[0025] The transmission member is sleeved with a first spring, which is located between the transmission member and the claw-type engaging member, and one end of the first spring is supported on the limiting ring, and the other end is supported on the inner wall of the claw-type engaging member.

[0026] The mechanical clutch mechanism, wherein a limit block is provided on the driving shaft of the driving member, a connecting rod is connected between the limit block and the transmission member, and the engaging member is sleeved on the connecting rod;

[0027] A second spring is sleeved on the connecting rod, one end of the second spring supports the limiting block, and the other end of the second spring supports the engaging member.

[0028] The mechanical clutch mechanism, wherein the engaging member comprises:

[0029] A connecting block, the connecting block is sleeved on the connecting rod;

[0030] A plurality of second protrusions are connected to a side of the connecting block facing away from the limiting block, and the plurality of second protrusions correspond to the plurality of first slots one by one.

[0031] An automatic curtain device comprises a worm and a mechanical clutch mechanism as described in any one of the above items, wherein the mechanical clutch mechanism is connected to the worm.

[0032] Beneficial effect: In the present invention, in the event of a power outage, the pull ring is manually pulled to drive the clutch push assembly to rotate, so that the clutch push assembly pushes the engaging member to disengage from the first slot, and at the same time the pull ring drives the transmission member to rotate. This not only enables the curtain to be manually pulled during a power outage, but also avoids driving the drive shaft of the unpowered drive member to rotate and damaging the drive member. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of the automatic curtain device provided by the present invention;

[0034] Figure 2 A schematic diagram of the structure decomposition of the automatic curtain device (excluding the pull ring) provided by the present invention;

[0035] Figure 3 A schematic diagram of the structure of the top holding member provided by the present invention;

[0036] Figure 4 A schematic structural diagram of the claw-type engaging member provided by the present invention;

[0037] Figure 5 A partial structural schematic diagram of the pull ring provided by the present invention;

[0038] Figure 6 A schematic diagram of the structure of the top holding member provided by the present invention;

[0039] The markings in the accompanying drawings are: 1. driving member; 2. driving shaft; 3. engaging member; 31. connecting block; 32. second protrusion; 4. transmission member; 5. clutch pushing assembly; 51. supporting member; 52. claw-type engaging member; 521. annular sleeve portion; 522. engaging rod; 6. pull ring; 7. first slot; 8. second slot; 9. first protrusion; 10. arc groove; 11. limiting column; 12. engaging portion; 13. locking hole; 14. limiting ring; 15. first spring; 16. limiting block; 17. connecting rod; 18. second spring; 19. sub-limiting slot; 20. first latch; 21. first socket; 22. second latch; 23. second socket; 24. through hole; 100. worm. DETAILED DESCRIPTION

[0040] The present invention provides a mechanical clutch mechanism and an automatic curtain device. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0042] It should also be noted that the same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is 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 direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] The invention is further described below by describing embodiments in conjunction with the accompanying drawings.

[0045] This embodiment provides a mechanical clutch mechanism, which is applied to an automatic curtain device, such as Figure 1 and Figure 2 As shown, the mechanical clutch mechanism includes a driving member 1, a clamping member 3, a transmission member 4, a clutch pushing assembly 5 and a pull ring 6, wherein the clamping member 3 is connected to the driving shaft 2 of the driving member 1, wherein the driving member 1 is preferably a driving motor; the transmission member 4 is rotatably connected to the driving shaft 2, and the transmission member 4 is provided with a plurality of first clamping grooves 7 adapted to the clamping member 3, that is, the clamping member 3 can be clamped with a plurality of the first clamping grooves 7; under normal circumstances, that is, when no external force is applied to the pull ring 6 or the clutch pushing assembly 5, the clamping member 3 is clamped with a plurality of the first clamping grooves 7 to ensure that the mechanical clutch mechanism is in a state of being ... When the driving member 1 is working, the engaging member 3 can drive the transmission shaft to rotate synchronously; the clutch pushing component 5 is arranged on the transmission member 4, and the clutch pushing component 5 is used to push the engaging member 3 out of the first slot 7 and separate it from the transmission member 4 when the driving member 1 is not powered due to a power outage and the curtain can only be pulled manually; one end of the pull ring 6 is connected to the clutch pushing component 5, and when the driving member 1 cannot work due to a power outage, the user can manually pull the pull ring 6 to drive the clutch pushing component 5 to rotate, so that the clutch pushing component 5 pushes the engaging member 3 out of the first slot 7 and drives the transmission member 4 to rotate. That is to say, when the pull ring 6 is pulled, the engaging member 3 will be pushed away from the first slot 7 by the clutch pushing assembly 5 and separated from the transmission member 4, and when the pull ring 6 continues to be pulled, the pull ring 6 can drive the transmission member 4 to rotate to realize manual opening or closing of the curtain, but at the same time, the rotation of the transmission member 4 will not drive the engaging member 3 to rotate, thereby avoiding the engaging member 3 driving the driving shaft 2 of the driving member 1 to be forced to rotate and damaging the driving member 1.

[0046] In the present invention, when a power outage occurs, the pull ring 6 is manually pulled to drive the clutch push assembly 5 to rotate, so that the clutch push assembly 5 pushes the engaging member 3 out of the first engaging slot 7, and the pull ring 6 drives the transmission member 4 to rotate, thereby realizing manual pulling of the curtain during a power outage and avoiding driving the drive shaft 2 of the unpowered driving member 1 to rotate and damage the driving member 1. In addition, the mechanical clutch mechanism used in the present application has better stability than the electromagnetic mechanism in the prior art.

[0047] Specifically, Figure 2As shown, the clutch pushing assembly 5 includes a top holding member 51 and a claw-type engaging member 52. The top holding member 51 is sleeved on the transmission member 4. The top holding member 51 is provided with a plurality of second slots 8. The claw-type engaging member 52 is sleeved on the transmission member 4 and is located on the outside of the top holding member 51. One end of the pull ring 6 is connected to the claw-type engaging member 52. The pull ring 6 is in a belt shape and sleeved on the claw-type engaging member 52. Therefore, whether the pull ring 6 is stationary or being pulled, there is always a part of it in contact with the claw-type engaging member 52. The user can pull the pull ring 6 to make the claw engaging member 52 and the top holding member 51 engage with each other. The holding member 51 is engaged and connected, and drives the top holding member 51 to rotate and move along the length direction of the transmission member 4 to push the transmission member 4 out of the first slot 7; when the pull ring 6 is pulled, the pull ring 6 drives the claw-type engaging member 52 to rotate, and at the same time the claw-type engaging member 52 will engage with the top holding member 51 to drive the top holding member 51 to rotate synchronously, and the top holding member 51 will also move along the length direction of the transmission member 4 when rotating, and push the transmission member 4 out of the first slot 7, so that when the top holding member 51 drives the transmission member 4 to rotate, it will not drive the engaging member 3 to rotate.

[0048] The transmission member 4 is provided with a plurality of first protrusions 9, the transmission member 4 is cylindrical, and the plurality of first protrusions 9 are arranged around the circumference of the transmission member 4; the plurality of first protrusions 9 are located on the side of the supporting member 51 facing away from the engaging member 3; Figure 3 As shown, a plurality of arc grooves 10 are provided on the side of the supporting member 51 facing the first protrusion 9, and the plurality of arc grooves 10 correspond to the plurality of first protrusions 9 one by one; when the pull ring 6 is not pulled, the engaging member 3 is engaged in the first engaging groove 7, and the engaging member 3 supports the supporting member 51 so that the first protrusion 9 is located at the bottom of the corresponding arc groove 10; when the pull ring 6 is pulled, the pull ring 6 drives the claw-type engaging member 52 to rotate, and the claw-type engaging member 52 is engaged in the second engaging groove 8 of the supporting member 51, and drives the supporting member 51 to rotate, and when the supporting member 51 rotates, due to the interference of the first protrusion 9, the supporting member 51 will move in the direction close to the driving member 1 under the extrusion of the first protrusion 9, thereby squeezing the engaging member 3 and causing the engaging member 3 to disengage from the first engaging groove 7.

[0049] Limiting posts 11 are provided at the two top ends of each arc groove 10, and the limiting posts 11 are used to abut against the first protrusion 9 after the first protrusion 9 slides to the top end along the arc groove 10, so that the transmission member 4 and the supporting member 51 move synchronously. Specifically, after the pull ring 6 is pulled, the pull ring 6 presses the claw-type engaging member 52 into the second slot 8, and drives the supporting member 51 to rotate relative to the rotating member. At this time, the first protrusion 9 will slide along the inner wall of the corresponding arc groove 10 until the first protrusion 9 slides to the top end of the arc groove 10, and the first protrusion 9 will abut against the limiting posts 11. At this time, the pull ring 6 is continued to be pulled in the same direction, and the transmission member 4 will rotate synchronously with the supporting member 51.

[0050] The top holding member 51 is provided with a plurality of second slots 8, and the plurality of second slots 8 are arranged at intervals along the circumference of the top holding member 51; Figure 4 As shown, the claw-type engaging member 52 includes an annular sleeve portion 521 and a plurality of engaging rods 522 connected to one side of the annular sleeve portion 521, the plurality of engaging rods 522 are arranged in a ring shape at intervals along one side edge of the annular sleeve portion 521, and the plurality of engaging rods 522 correspond to the plurality of second slots 8 one by one; the annular sleeve portion has a through hole, and the annular sleeve portion 521 is sleeved on the transmission member 4 through the through hole; the slot extends along the axial direction of the transmission member 4, the engaging rod 522 is parallel to the slot, and both ends of the second slot 8 are open, so that when the claw-type engaging member 52 is subjected to the pressure of the pull ring 6, the engaging rod 522 can be pressed into the corresponding second slot 8, and the length of the engaging rod 522 is longer than the length of the second slot 8 extending along the axial direction of the transmission member 4, so that the engaging rod 522 is not easy to disengage from the second slot 8, and can better drive the holding member 51 to rotate synchronously.

[0051] Each of the locking rods 522 is provided with a locking portion 12 on its outer side. Figure 5 As shown, the pull ring 6 is provided with a plurality of engaging holes 13 at intervals along the length direction of the pull ring 6. The engaging portion 12 is embedded in the engaging hole 13 by pulling the pull ring 6, and the engaging rod 522 is embedded in the second engaging groove 8; when the user pulls the pull ring 6 from the end of the pull ring 6 away from the claw-type engaging part 52, the engaging portion 12 is embedded in the corresponding engaging hole 13, so that the pull ring 6 can drive the claw-type engaging part 52 to move synchronously, and the engaging rod 522 will also be pressed into the corresponding second engaging groove 8 under the action of the pull ring 6, and the supporting member 51 can rotate synchronously with the claw-type engaging part 52.

[0052] A limiting groove is also provided on the claw-type engaging member 52, and the limiting groove is arranged around the outer sides of the plurality of engaging rods 522. The width of the limiting groove is adapted to the width of the pull ring 6, so that when the pull ring 6 is pulled, the end of the pull ring 6 that contacts the claw-type engaging member 52 can be engaged into the limiting groove, so as to ensure the stability of the engagement between the pull ring 6 and the claw-type engaging member 52.

[0053] The limiting groove includes a plurality of sub-limiting grooves 19, and the plurality of sub-limiting grooves 19 correspond to the plurality of engaging rods 522 one by one; each of the sub-limiting grooves 19 is arranged on the corresponding engaging rod 522, and each of the sub-limiting grooves 19 is arranged in alignment to form the annular limiting groove; specifically, the sub-limiting grooves 19 are arranged along the length direction of the corresponding engaging rod 522, and the two ends of the limiting grooves are open in the width direction of the engaging rod 522. The locking portion 12 on the engaging rod 522 is arranged in the sub-limiting groove 19, and preferably, the locking portion 12 is arranged in the middle position of the sub-limiting groove 19.

[0054] A limit ring 14 is provided on the transmission member 4 along the circumference of the transmission member 4, and the limit ring 14 is located on the side of the support member 51 facing away from the engaging member 3; a first spring 15 is sleeved on the transmission member 4, and the first spring 15 is located between the transmission member 4 and the claw engaging member 52, and one end of the first spring 15 is supported by the limit ring 14, and the other end is supported by the inner wall of the claw engaging member 52. After the pull ring 6 is manually pulled, the support member 51 and the claw engaging member 52 will both move along the transmission member 4 toward the direction close to the driving member 1, and during this process, the first spring 15 will be compressed. When the pull ring 6 is released, the support member 51 will be pushed back by the engaging member 3 to the bottom of the arc groove 10 where the first protrusion 9 is located, and at the same time, the claw engaging member 52 will also move away from the engaging member 3 under the elastic force of the first spring 15 to restore the initial position.

[0055] A limit block 16 is provided on the driving shaft 2 of the driving member 1, and a connecting rod 17 is connected between the limit block 16 and the transmission member 4, one end of the connecting rod 17 is fixedly connected to the limit block 16, and the other end is rotatably connected to the transmission member 4; the engaging member 3 is sleeved on the connecting rod 17, and a second spring 18 is also sleeved on the connecting rod 17, one end of the second spring 18 supports the limit block 16, and the other end supports the engaging member 3. When the engaging member 3 is separated from the first slot 7 under the supporting force of the supporting member 51 and moves toward the limit block 16 along the length direction of the connecting rod 17, the second spring 18 is compressed, and when the supporting member 51 no longer applies the supporting force to the engaging member 3, the engaging member 3 moves in the direction away from the limit block 16 under the elastic force of the second spring 18 until the engaging member 3 is engaged with the first slot 7.

[0056] like Figure 6 As shown, the engaging member 3 includes a connecting block 31 and a plurality of second protrusions 32, wherein the connecting block 31 is sleeved on the connecting rod 17 and is slidably connected to the connecting rod 17; a through hole 24 is provided on the connecting block 31, and the through hole 24 is adapted to the cross-sectional shape of the connecting rod 17, and the connecting rod 17 is penetrated in the through hole 24; the position on the connecting rod 17 between the limit block 16 and the transmission member 4 is set as a flat mouth, and the flat mouth means that the cross section of the connecting rod 17 is a non-circular cross section, so that the connecting block 31 will not rotate relative to the connecting rod 17; a plurality of second protrusions 32 are connected to the connecting block 31 and face away from the connecting rod 1 7, and a plurality of the second protrusions 32 correspond one to one with a plurality of the first slots 7; when the supporting member 51 does not apply pressure to the engaging member 3, a plurality of the second protrusions 32 are pushed into the first slots 7 under the elastic force of the second spring 18, so that when the driving shaft 2 of the driving member 1 drives the engaging member 3 to rotate, the engaging member 3 can further drive the transmission member 4 to rotate synchronously; when the supporting member 51 supports the second protrusion 32 and makes the second protrusion 32 completely disengage from the first slot 7, since the connecting rod 17 is rotationally connected with the transmission member 4, the transmission member 4 will not drive the connecting rod 17 to rotate while rotating synchronously with the supporting member 51.

[0057] A first pin 20 is provided on the end of the driving shaft 2 close to the connecting rod 17, and a first socket 21 is provided on the limit block 16. The first pin 20 is inserted into the first socket 21, so as to fix the limit block 16 with the driving shaft 2; a second pin 22 is provided on the end of the connecting rod 17 close to the driving shaft 2, and a second socket 23 is provided on the limit block 16. The second pin 22 is inserted into the second socket 23, so as to fix the limit block 16 with the connecting rod 17.

[0058] This embodiment also discloses an automatic curtain device, which includes a worm 100 and a mechanical clutch mechanism as described in any one of the above items, wherein the mechanical clutch mechanism is connected to the worm 100; specifically, one end of the worm 100 is fixedly connected to the transmission member 4, so that when the transmission member 4 rotates, the worm 100 can rotate synchronously with the transmission member 4; the worm 100 is used to hang curtains, and when the worm 100 rotates, it can drive the curtains to move, thereby realizing automatic opening and closing of the curtains.

[0059] In summary, the present invention discloses a mechanical clutch mechanism and an automatic curtain device, the automatic curtain device comprising: a driving member; a clamping member, the clamping member being connected to the driving shaft of the driving member; a transmission member, the transmission member being provided with a plurality of first clamping grooves adapted to the clamping member; a clutch pushing assembly, the clutch pushing assembly being provided on the transmission member; and a pull ring, one end of the pull ring being connected to the clutch pushing assembly, the clutch pushing assembly being driven to rotate by pulling the pull ring, so that the clutch pushing assembly pushes the clamping member out of the first clamping groove and drives the transmission member to rotate. In the present invention, in the event of a power outage, the clutch pushing assembly is driven to rotate by manually pulling the pull ring, so that the clutch pushing assembly pushes the clamping member out of the first clamping groove, and the pull ring drives the transmission member to rotate, thus realizing manual pulling of the curtain during a power outage and avoiding damage to the driving member by driving the driving shaft of the unpowered driving member to rotate.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mechanical clutch mechanism, characterized in that: It includes: Driving parts; A clamping member, the clamping member being connected to a driving shaft of the driving member; A transmission member, wherein the transmission member is provided with a plurality of first slots adapted to the engaging member; A clutch pushing component, wherein the clutch pushing component is arranged on the transmission member; as well as A pull ring, one end of which is connected to the clutch push assembly, and the clutch push assembly is driven to rotate by pulling the pull ring, so that the clutch push assembly pushes the engaging member to disengage from the first slot and drives the transmission member to rotate; The clutch push assembly comprises: A top holding member, the top holding member is sleeved on the transmission member, and the top holding member is provided with a plurality of second slots; A claw-type engaging member, which is sleeved on the transmission member and located outside the supporting member; One end of the pull ring is connected to the claw-type engaging member, and the claw-type engaging member is engaged and connected with the top holding member by pulling the pull ring, and the top holding member is driven to rotate and move along the length direction of the transmission member, so as to push the engaging member out of the first clamping groove; The transmission member is provided with a plurality of first protrusions, and the plurality of first protrusions are located on one side of the supporting member; A plurality of arc-shaped grooves are arranged on one side of the supporting member facing the first protrusion, and the plurality of arc-shaped grooves correspond to the plurality of first protrusions one by one; When the pull ring is not pulled, the engaging member is engaged with the first engaging groove, and the engaging member supports the supporting member so that the first protrusion is located at the bottom of the corresponding arc groove; When the pull ring is pulled, the pull ring drives the claw-type embedded part to rotate, and at the same time, the claw-type embedded part will engage with the top holding part to drive the top holding part to rotate synchronously. When rotating, the top holding part will also move along the length direction of the transmission part and push the transmission part out of the first slot, so that when the top holding part drives the transmission part to rotate, it will not drive the engaging part to rotate. In addition, when the top holding part rotates, due to the interference of the first protrusion, the top holding part will move in the direction close to the driving part under the pressure of the first protrusion, thereby squeezing the engaging part and making the engaging part out of the first slot; limiting columns are provided at the two top ends of each of the arc grooves, and the limiting columns are used to abut against the first protrusion after the first protrusion slides to the top end along the arc groove, so that the transmission part and the top holding part move synchronously; After pulling the pull ring, the pull ring presses the claw-type engaging part into the second slot, thereby driving the supporting part to rotate relative to the transmission part. At this time, the first protrusion will slide along the inner wall of the corresponding arc groove until the first protrusion slides to the top of the arc groove. Then, the first protrusion will abut against the limiting column. At this time, continue to pull the pull ring in the same direction, and the transmission part will rotate synchronously with the supporting part.

2. The mechanical clutch mechanism according to claim 1, characterized in that: The top holding member is provided with a plurality of second slots, and the plurality of second slots are arranged at intervals along the circumference of the top holding member; The claw-type engaging member includes an annular sleeve portion and a plurality of engaging rods connected to one side of the annular sleeve portion, the plurality of engaging rods are arranged in an annular shape along one side edge of the annular sleeve portion, and the plurality of engaging rods correspond to the plurality of second slots one by one.

3. The mechanical clutch mechanism according to claim 2, characterized in that: The outer side surface of each of the clamping rods is provided with a clamping portion; The pull ring is provided with a plurality of clamping holes at intervals along the length direction of the pull ring. The clamping part is embedded in the clamping hole by pulling the pull ring, and the clamping rod is embedded in the second clamping groove.

4. The mechanical clutch mechanism according to claim 1, characterized in that: A limiting ring is arranged on the transmission member along the circumference of the transmission member, and the limiting ring is located on a side of the supporting member facing away from the engaging member; The transmission member is sleeved with a first spring, which is located between the transmission member and the claw-type engaging member, and one end of the first spring is supported on the limiting ring, and the other end is supported on the inner wall of the claw-type engaging member.

5. The mechanical clutch mechanism according to claim 1, characterized in that: A limit block is arranged on the driving shaft of the driving member, a connecting rod is connected between the limit block and the transmission member, and the engaging member is sleeved on the connecting rod; A second spring is sleeved on the connecting rod, one end of the second spring supports the limiting block, and the other end of the second spring supports the engaging member.

6. The mechanical clutch mechanism according to claim 5, characterized in that: The engaging member comprises: A connecting block, the connecting block is sleeved on the connecting rod; A plurality of second protrusions are connected to a side of the connecting block facing away from the connecting rod, and the plurality of second protrusions correspond to the plurality of first slots one by one.

7. An automatic curtain device, characterized in that: It comprises a worm and a mechanical clutch mechanism as claimed in any one of claims 1 to 6, wherein the mechanical clutch mechanism is connected to the worm.

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