Rotation controlled release clutch

Abstract

A rotary control tension clutch comprises a clutch fixing chassis, a clutch body, a clutch claw plate, a clutch output shaft and a knob, wherein the clutch body is fixedly mounted on the clutch fixing chassis, and the clutch body has an upper cavity and a lower cavity connected up and down, and the inner wall of the upper cavity is provided with gear teeth; the clutch claw plate is arranged in the upper cavity, and the clutch claw plate comprises a claw seat located in the center and a plurality of elastic arms arranged on the periphery of the claw seat, and each elastic arm is provided with a ratchet at one end away from the claw seat toward the gear teeth; the lower end of the clutch output shaft is arranged in the lower cavity, and the upper end of the clutch output shaft is connected with the clutch claw plate as a whole, so that the clutch output shaft rotates with the clutch claw plate; the knob is rotatably covered on the upper end of the clutch body, and the lower surface of the knob is provided with a driving part and an unlocking part. The present invention can quickly adjust the tightness of the rope by rotating the knob forward or reversely, and has a simple structure and is easy to use.

Description

Technical Field

[0001] The invention relates to the technical field of daily necessities, and in particular to a rotation-controlled loosening and tightening clutch. Background Art

[0002] In daily life, fastening by tying ropes is a common way to fasten shoes, medical protective gear or other daily necessities. Take shoes as an example. When using sports shoes or canvas shoes, the shoelaces are usually passed through the shoe holes and then fastened with a bow or other knots. During exercise, the shoelaces are easy to loosen. If you are walking on the road or carrying a lot of items, the shoelaces are loose and need to be tightened, which is even more inconvenient; especially during exercise, once the shoelaces are loose, accidents are likely to occur.

[0003] At present, there are a few daily necessities on the market with lace tensioning devices, but their structure is complex, and the accessories are small and numerous, resulting in complex manufacturing processes and cannot be assembled quickly; the production cost is high, the structural stability is not strong, the scrap rate is high, and the use effect is poor. During use, the forced unlocking mechanism is used, and the operation is complicated. After tightening the rope, the mechanism can only be pulled up to disengage. The process of loosening and tightening the rope cannot be connected, and the tightness of the rope cannot be fine-tuned. Due to the complex mechanical structure and space issues, the components are small and extremely easy to break, resulting in safety issues such as sudden loosening of the rope, rope strangulation, or mechanism disintegration. Summary of the invention

[0004] In view of the above-mentioned deficiencies, the purpose of the present invention is to provide a rotationally controlled tensioning clutch to solve the problems of complex and unstable structure of the lacing device. When installed on a wearable object, the rope can be tied quickly and the rope can be easily fine-tuned, which is easy to use.

[0005] The embodiment of the present invention provides a rotation control tension and release clutch, comprising a clutch fixing chassis, a clutch body, a clutch claw plate, a clutch output shaft and a knob;

[0006] The clutch body is fixedly mounted on the clutch fixing chassis, and the clutch body has an upper cavity and a lower cavity connected to each other, and the inner wall of the upper cavity is provided with gear teeth;

[0007] The clutch claw piece is arranged in the upper cavity, and the clutch claw piece includes a claw seat located in the center and a plurality of elastic arms arranged at the periphery of the claw seat, and each elastic arm is provided with a ratchet at one end away from the claw seat and facing the gear teeth;

[0008] The lower end of the clutch output shaft is disposed in the lower cavity, and the upper end of the clutch output shaft is connected to the clutch claw plate as a whole, so that the clutch output shaft rotates together with the clutch claw plate;

[0009] The knob is rotatably covered on the upper end of the clutch body, and a driving part and an unlocking part are provided on the lower surface of the knob; wherein:

[0010] When the knob rotates forward, the knob pushes the clutch claw plate to rotate through the driving part, and the clutch claw plate drives the clutch output shaft to rotate together, each elastic arm opens outward and the ratchet pawl is in meshing state with the gear teeth;

[0011] When the knob is reversed, the knob applies a force to each elastic arm through the unlocking portion to cause each elastic arm to contract inwardly, the pawl is disengaged from the gear teeth, and the clutch output shaft can rotate freely.

[0012] Furthermore, the elastic arm is connected to the claw seat at a certain angle, and a locking portion is formed between the inner side surface of the elastic arm and the outer peripheral surface of the claw seat to facilitate the driving part to push the clutch claw plate to rotate.

[0013] Furthermore, the cross-sectional shape of the pawl is wedge-shaped, and the shape of the pawl matches the shape of the gear tooth, so that the pawl and the gear tooth are unidirectionally meshed.

[0014] Furthermore, a partition plate is provided in the clutch body between the upper cavity and the lower cavity.

[0015] Furthermore, a connecting portion is provided at the upper end of the clutch output shaft, and the connecting portion passes through the middle portion of the claw seat and is connected to the claw seat.

[0016] Furthermore, the connecting part is a cross-shaped connecting shaft, a cross hole for the connecting part to pass through is opened in the middle of the claw seat, and the cross-shaped connecting shaft matches the cross hole.

[0017] Furthermore, a positioning column extends downward from the center of the lower surface of the knob, and the positioning column passes through the middle of the connecting part.

[0018] Furthermore, a buckle is provided downwardly on the periphery of the knob, and the buckle is clamped on the outer periphery of the upper end of the clutch body.

[0019] Furthermore, the unlocking portion is located at the periphery of the driving portion, and the unlocking portion is a protrusion protruding from the lower surface of the knob. The protrusion applies a squeezing force to the elastic arm to cause the elastic arm to contract inward, thereby switching the meshing state or disengagement state between the pawl and the gear teeth.

[0020] Furthermore, the outer side wall of the elastic arm is provided with a flange, and the inner side wall of the unlocking portion is provided with a slot matching the flange.

[0021] Furthermore, the driving portion and the unlocking portion are staggered by a certain distance in the circumferential direction of the knob.

[0022] Furthermore, the unlocking portion is an arc-shaped groove formed indented on the lower surface of the knob; the elastic arm has a protrusion extending toward the arc-shaped groove, the protrusion is embedded in the arc-shaped groove and slides in the arc-shaped groove, and the arc-shaped groove radiates from a position close to the center of the knob to the periphery to guide the elastic arm to deform so that the pawl and the gear teeth are in an engaged or disengaged state.

[0023] Furthermore, a rope bin is circumferentially arranged at the lower end of the clutch output shaft for the tether to be wound around the outer wall of the rope bin; a wire groove is provided on the side wall of the rope bin, and a accommodating cavity is provided inside the rope bin.

[0024] Furthermore, the clutch fixing chassis includes a bottom plate and a cylindrical portion arranged on the bottom plate, and the bottom plate and the cylindrical portion form a semi-open space for the clutch body to be placed in the semi-open space.

[0025] Further, the number of the elastic arms is two or three, the number of the driving parts is the same as the number of the elastic arms, and the number of the unlocking parts is the same as the number of the elastic arms.

[0026] Furthermore, the rotation-controlled tension clutch is used on shoes to adjust the tightness of shoelaces.

[0027] The rotary control tension and release clutch provided in the present embodiment can be switched between a tight rope state and a loose rope state by a forward or reverse rotation knob. When the knob is rotated forward, the clutch claw plate is in a meshing state with the gear teeth, thereby controlling the clutch output shaft to rotate forward to establish a tight rope state; when the knob is rotated reversely, the clutch claw plate is disengaged from the gear teeth, so that the clutch output shaft can rotate freely to establish a loose rope state. The present invention has a simple structure and is easy to assemble. The tightness of the rope can be quickly adjusted by a forward or reverse rotation knob, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 labor.

[0029] Figure 1 It is a schematic diagram of the decomposition of the rotation-controlled tension-release clutch in the first embodiment of the present invention.

[0030] Figure 2 It is a front view of the rotation-controlled tensioning clutch in the first embodiment of the present invention.

[0031] Figure 3 for Figure 2 Cross-sectional view of the mid-rotation control tension and release clutch along AA.

[0032] Figure 4 for Figure 1 A three-dimensional view of the clutch body.

[0033] Figure 5 for Figure 1 A three-dimensional view of the middle clutch claw.

[0034] Figure 6 for Figure 1 A three-dimensional view of the clutch output shaft.

[0035] Figure 7 for Figure 6 main view.

[0036] Figure 8 for Figure 6 Schematic diagram of the internal structure of the clutch output shaft.

[0037] Fig. 9 for Figure 1 Schematic diagram of the bottom surface of the middle knob.

[0038] Fig.10 It is a schematic diagram of the cooperation between the knob and the clutch claw in the rope tightening state in the first embodiment of the present invention.

[0039] Fig.11 It is a schematic diagram of the cooperation between the knob and the clutch claw in the loose rope state in the first embodiment of the present invention.

[0040] Fig.12 It is a three-dimensional diagram of a knob in the second embodiment of the present invention.

[0041] Fig.13 FIG. 1 is a top view of a clutch claw piece in a second embodiment of the present invention.

[0042] Fig.14 Schematic diagram of the cooperation between the knob and the clutch claw in the rope tightening state in the second embodiment of the present invention.

[0043] Fig.15 It is a schematic diagram of the cooperation between the knob and the clutch claw in the rope slack state in the second embodiment of the present invention.

[0044] In the figure, 10-clutch fixed chassis, 11-bottom plate, 12-cylindrical part, 20-clutch body, 21-gear teeth, 22-rope hole, 23-partition plate, 30-clutch claw plate, 31-claw seat, 311-locking part, 32-elastic arm, 321-bump, 33-pawl, 34-flange, 35-cross hole, 40-clutch output shaft, 401-connecting part, 41-rope bin, 411-wire groove, 50-knob, 501-positioning column, 502-buckle, 51-driving part, 52-unlocking part, 521-slot, 60-rope, 61-knot. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0046] 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.

[0047] [First embodiment]

[0048] Please refer to Figures 1 to 3 In the embodiment provided by the present invention, the rotation control tension and release clutch includes a clutch fixed chassis 10, a clutch body 20, a clutch claw plate 30, a clutch output shaft 40 and a knob 50.

[0049] Specifically, the clutch fixing chassis 10 includes a bottom plate 11 and a cylindrical portion 12 arranged on the bottom plate 11, the bottom plate 11 and the cylindrical portion 12 form a semi-open space, the diameter of the clutch body 20 is slightly smaller than the diameter of the cylindrical portion 12, the lower end of the clutch body 20 is placed in the semi-open space, and is stuck in the clutch fixing chassis 10, ensuring the fixed connection between the clutch body 20 and the clutch fixing chassis 10. The clutch fixing chassis 10 is arranged at the bottom of the rotation control tension clutch, and the periphery of the bottom plate 11 is used to sew on a wearable object such as a shoe. Preferably, the clutch fixing chassis 10 is made of synthetic fiber material, which can be directly sewed without the need to sew with other materials, and the fixing is simple and quick. Of course, other materials can also be selected according to actual use conditions, and the present invention does not limit the material of the clutch fixing chassis 10.

[0050] Please combine Figure 4 The clutch body 20 is fixedly mounted on the clutch fixing chassis 10. Specifically, the clutch body 20 can be fixedly mounted on the clutch fixing chassis 10 by snapping or other means. The interior of the clutch body 20 has an upper cavity and a lower cavity that are connected up and down. The inner wall of the upper cavity is evenly provided with gear teeth 21 along the circumferential direction of the clutch body 20. Specifically, in order to prevent the parts in the upper cavity and the lower cavity from shifting during use, a partition plate 23 is provided between the upper cavity and the lower cavity in the clutch body 20 to ensure the stability of the rotation control tension clutch.

[0051] The side wall of the clutch body 20 is provided with two rope holes 22. The rope holes 22 can be provided at any position of the side wall. In this embodiment, the two rope holes 22 are respectively provided at the bottom of the side wall of the clutch body 20. In actual use, the rope 60 has two ends, and the two ends of the rope 60 are respectively inserted into the rope holes 22 and enter the lower cavity of the clutch body 20.

[0052] Please combine Figure 5 The clutch claw piece 30 is arranged in the upper cavity of the clutch body 20. The clutch claw piece 30 includes a claw seat 31 located in the center and a plurality of elastic arms 32 arranged on the periphery of the claw seat 31. A ratchet 33 is arranged at one end of each elastic arm 32 away from the claw seat 31 and facing the gear 21. Specifically, in order to ensure that the rope is collected in the tight rope state, when the ratchet 33 is in meshing state with the gear 21, the rotation control tension and release clutch can only rotate forward and cannot be reversed. Only when the ratchet 33 is disengaged from the gear 21, the rotation control tension and release clutch can be reversed. Specifically, the cross-sectional shape of the ratchet 33 of the clutch claw piece 30 is wedge-shaped, that is, the ratchet 33 is a triangular tooth with bias, and the shape of the ratchet 33 matches the shape of the gear 21, so that the ratchet 33 and the gear 21 are unidirectionally meshed to maintain the tight rope state.

[0053] In this embodiment, three elastic arms 32 are evenly arranged on the periphery of the claw seat 31, and space is reserved for deformation of the elastic arms 32. In actual use, the number of the elastic arms 32 can be adjusted according to actual conditions, for example, two elastic arms 32 are arranged.

[0054] Please combine Figures 6 to 8 The lower end of the clutch output shaft 40 is arranged in the lower cavity of the clutch body 20, and the upper end of the clutch output shaft 40 is connected to the clutch claw plate 30 as a whole, so that the clutch output shaft 40 rotates with the clutch claw plate 30. Specifically, the upper end of the clutch output shaft 40 is provided with a connecting portion 401, and the connecting portion 401 passes through the middle of the claw seat 31, and the height of the connecting portion 401 extending upward does not exceed the height of the upper cavity in the clutch body 20. In this embodiment, the connecting portion 401 is a cross-shaped connecting shaft, and the middle of the claw seat 31 is provided with a cross hole 35 for the connecting portion 401 to pass through. The cross-shaped connecting shaft matches the cross hole 35, so that the upper end of the clutch output shaft 40 is connected to the clutch claw plate 30 as a whole. In other embodiments, the upper end of the clutch output shaft 40 can also be connected to the clutch claw plate 30 as a whole by other means.

[0055] Specifically, a rope bin 41 is provided at the lower end of the clutch output shaft 40 along the circumferential direction, for the tether to be wound around the outer wall of the rope bin 41. When the clutch output shaft 40 rotates together with the clutch claw 30, the rope bin 41 is driven to rotate together, so as to achieve the purpose of collecting and releasing the rope. More specifically, a wire groove 411 is provided on the side wall of the rope bin 41, and a receiving cavity is provided inside the rope bin 41. Preferably, two wire grooves 411 are provided on the side wall of the rope bin 41. In actual use, the rope 60 has two ends, and when the two ends of the rope 60 enter the rope bin 41 from the two rope holes 22 respectively, the two ends pass through the two wire grooves 411 and enter the receiving cavity inside the rope bin 41 respectively, and the two ends are tied into a knot 61, so that the rope 60 forms a closed loop, and when the rope bin 41 rotates forward, the rope 60 is wound around the side wall of the rope bin 41.

[0056] The knob 50 is rotatably covered on the upper end of the clutch body 20. Specifically, a positioning column 501 extends downward from the center of the lower surface of the knob 50, and the positioning column 501 passes through the middle of the connecting portion 401. Specifically, a hole (not shown) for the positioning column 501 to pass through is provided in the middle of the connecting portion 401, so as to facilitate the positioning and assembly of the positioning column 501 of the knob 50. Preferably, the positioning column 501 is a cylindrical column. Of course, the positioning column 501 can also be other shapes, such as a triangular prism, a quadrangular prism, and other shapes.

[0057] More specifically, a buckle 502 is provided downwardly on the periphery of the knob 50 , and the buckle 502 is clamped on the outer periphery of the upper end of the clutch body 20 , so as to facilitate the rapid combination of the rotation control clutch and prevent the knob 50 from falling off.

[0058] Please combine Fig. 9 The lower surface of the knob 50 is provided with a driving part 51 and an unlocking part 52; wherein:

[0059] When the knob 50 rotates forward, the knob 50 pushes the clutch claw 30 to rotate through the driving part 51, and the clutch claw 30 drives the clutch output shaft 40 to rotate together to establish a tight rope state. At this time, each elastic arm 32 opens outward and the ratchet 33 is in meshing state with the gear teeth 21, as shown in FIG. Fig.10 As shown;

[0060] When the knob 50 is reversed, the knob 50 applies a force to each elastic arm 32 through the unlocking portion 52 to cause each elastic arm 32 to retract inward, so that the pawl 33 is out of mesh with the gear teeth 21. At this time, the clutch output shaft 40 can rotate freely to establish a loose rope state, such as Fig.11 shown.

[0061] For the convenience of explanation, in this embodiment, the clockwise rotation direction is defined as positive rotation, and the counterclockwise rotation direction is defined as negative rotation.

[0062] Please refer to Figure 5 The end of each elastic arm 32 close to the claw seat 31 is connected to the claw seat 31 at a certain angle, and a locking portion 311 is formed between the inner side surface of the elastic arm 32 and the outer peripheral surface of the claw seat 31, which facilitates the driving unit 51 to push the clutch claw plate 30 to rotate. A ratchet 33 is provided at one end of each elastic arm 32 away from the claw seat 31 toward the gear 21. Under the action of external force, the elastic arm 32 is deformed, thereby switching the meshing state or disengagement state between the ratchet 33 and the gear 21.

[0063] Please refer to Figures 9 to 11 The driving part 51 can be a block of any shape. The number of driving parts 51 is the same as the number of elastic arms 32. In this embodiment, there are three driving parts 51, and the three driving parts 51 are located on the same circle. Since the driving part 51 is fixed to the lower surface of the knob 50, when the user rotates the knob 50 forward, the driving part 51 is driven to rotate. When the driving part 51 is stuck in the locking part 311, the user continues to rotate the knob 50 forward, which can push the clutch claw 30 to rotate forward.

[0064] In this embodiment, the unlocking portion 52 is located at the periphery of the driving portion 51, that is, the distance from the center of the knob 50 to the driving portion 51 is smaller than the distance from the center of the knob 50 to the unlocking portion 52. The unlocking portion 52 is a block protruding from the lower surface of the knob 50. Similarly, the number of the unlocking portions 52 is the same as the number of the elastic arms 32. In this embodiment, the number of the unlocking portions 52 is three, and the three unlocking portions 52 are located on another same circle. The outer wall of each elastic arm 32 is provided with a flange 34 (see FIG. 2 ). Figure 5), the inner side wall of each unlocking portion 52 is provided with a slot 521 matching the flange 34. Preferably, the cross-section of the slot 521 is arc-shaped, which facilitates the flange 34 to be inserted and slid out. Since the unlocking portion 52 is fixed to the lower surface of the knob 50, when the user reverses the knob 50, the unlocking portion 52 is driven to rotate. During the reversal process, the driving portion 51 moves in a direction away from the locking portion 311, and the unlocking portion 52 applies an extrusion force to the elastic arm 32, causing the elastic arm 32 to shrink inward, thereby causing the pawl 33 to disengage from the gear teeth 21. When the unlocking portion 52 rotates to the nearest flange 34, the slot 521 clamps the flange 34. Since the elastic arm 32 has an outward elastic force, the slot 521 and the flange 34 will not fall off, thereby driving the clutch claw 30 to reverse.

[0065] For details, please refer to Fig. 9 , the driving part 51 and the unlocking part 52 are not on the same straight line along the radial direction, that is, the driving part 51 and the unlocking part 52 are staggered by a certain distance in the circumferential direction of the knob 50. When the knob 50 is rotated forward, the driving part 51 is stuck in the locking part 311 and drives the clutch claw 30 to rotate forward. Due to the outward tension of the elastic arm 32, the pawl 33 is engaged with the gear 21. When the user disengages the knob 50 and stops rotating, the pawl 33 remains engaged with the gear 21, establishing a tight rope state, and the rope 60 will not loosen. When the knob 50 is reversed, the elastic arm 32 is squeezed inward by the unlocking part 52, so that the pawl 33 is disengaged from the gear 21. At this time, the clutch output shaft 40 can rotate freely to establish a loose rope state, and the rope 60 can be loosened.

[0066] [Second embodiment]

[0067] See also Fig.12 and Fig.13 The difference between this embodiment and the previous embodiment is that each unlocking portion 52 is an arc-shaped groove formed by a depression on the lower surface of the knob 50; each elastic arm 32 has a protrusion 321 extending toward the arc-shaped groove, and the protrusion 321 is embedded in the arc-shaped groove and slides in the arc-shaped groove. The arc-shaped groove radiates from a position close to the center of the knob 50 to the periphery, that is, the distance between any point of the arc-shaped groove and the gear tooth 21 is different, so as to guide the elastic arm 32 to deform so that the pawl 33 and the gear tooth 21 are in a meshing state or a disengaged state.

[0068] Please combine Fig.14In this embodiment, a driving part 51 is provided on the lower surface of the knob 50. The driving part 51 can be a block of any shape. Since the driving part 51 is fixed on the lower surface of the knob 50, when the user rotates the knob 50 forward, the driving part 51 is driven to rotate. When the driving part 51 is stuck in the locking part 311, the user continues to rotate the knob 50 forward, which can drive the clutch claw 30 to rotate forward. At this time, the protrusion 321 is closest to the gear teeth 21 in the arc groove, so that the ratchet 33 on the elastic arm 32 is engaged with the gear teeth 21, so that the rotation control tension and release clutch reaches the rope tightening state.

[0069] See also Fig.15 The user reverses the knob 50. During the reversal, the driving portion 51 moves in a direction away from the locking portion 311. At the same time, the protrusion 321 slides in the arc groove and gradually moves away from the gear tooth 21, so that the pawl 33 is disengaged from the gear tooth 21. At this time, the rotation control tension clutch is in a loose rope state. When the user reverses while pulling the rope 60, the rope 60 can be pulled out.

[0070] In the above embodiments, the rotation control tension clutch is used on wearable articles that require tying, such as footwear, medical protective gear, etc. Preferably, the rotation control tension clutch is used on shoes to adjust the tightness of shoe laces.

[0071] In other embodiments, since different users are accustomed to using their hands differently, the clockwise rotation direction may be considered as reverse rotation, and the counterclockwise rotation direction may be considered as forward rotation. The knob 50 establishes a tight rope state by forward rotation, and a loose rope state by reverse rotation. The principles are the same and will not be repeated here.

[0072] In the description of the present invention, it is necessary to understand that the terms "center", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0073] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotation-controlled loosening and tightening clutch, characterized in that: It comprises a clutch fixing chassis (10), a clutch body (20), a clutch claw plate (30), a clutch output shaft (40) and a knob (50); The clutch body (20) is fixedly mounted on the clutch fixing chassis (10), the clutch body (20) has an upper cavity and a lower cavity connected to each other, and the inner wall of the upper cavity is provided with gear teeth (21); The clutch claw piece (30) is arranged in the upper cavity, and the clutch claw piece (30) comprises a claw seat (31) located in the center and a plurality of elastic arms (32) arranged on the periphery of the claw seat (31), and each elastic arm (32) is provided with a ratchet (33) at one end away from the claw seat (31) and facing the gear tooth (21); The lower end of the clutch output shaft (40) is disposed in the lower cavity, and the upper end of the clutch output shaft (40) is connected to the clutch claw plate (30) as a whole, so that the clutch output shaft (40) rotates together with the clutch claw plate (30); The knob (50) is rotatably covered on the upper end of the clutch body (20), and a driving portion (51) and an unlocking portion (52) are provided on the lower surface of the knob (50); wherein: When the knob (50) rotates forward, the knob (50) pushes the clutch claw plate (30) to rotate via the driving portion (51), and the clutch claw plate (30) drives the clutch output shaft (40) to rotate together, each elastic arm (32) opens outward and the ratchet pawl (33) is in a meshing state with the gear teeth (21); When the knob (50) is reversed, the knob (50) applies a force to each elastic arm (32) through the unlocking portion (52) so that each elastic arm (32) contracts inwardly, the ratchet pawl (33) is in a disengaged state from the gear teeth (21), and the clutch output shaft (40) can rotate freely; The elastic arm (32) is connected to the claw seat (31), and a locking portion (311) is formed between the inner side surface of the elastic arm (32) and the outer peripheral surface of the claw seat (31) to facilitate the driving portion (51) to push the clutch claw plate (30) to rotate; The cross-sectional shape of the pawl (33) is wedge-shaped, and the shape of the pawl (33) matches the shape of the gear tooth (21), so that the pawl (33) and the gear tooth (21) are unidirectionally meshed; A partition plate (23) is provided in the clutch body (20) between the upper cavity and the lower cavity; The upper end of the clutch output shaft (40) is provided with a connecting portion (401), and the connecting portion (401) passes through the middle of the claw seat (31) and is connected to the claw seat (31); The connecting portion (401) is a cross-shaped connecting shaft, a cross hole (35) is provided in the middle of the claw seat (31) for the connecting portion (401) to pass through, and the cross-shaped connecting shaft matches the cross hole (35); A positioning column (501) extends downward from the center of the lower surface of the knob (50), and the positioning column (501) passes through the middle of the connecting portion (401).

2. The rotation-controlled tension-release clutch according to claim 1, characterized in that: A buckle (502) is provided downwardly on the periphery of the knob (50), and the buckle (502) is clamped on the outer periphery of the upper end of the clutch body (20).

3. The rotation-controlled release clutch according to claim 1, characterized in that: The unlocking portion (52) is located at the periphery of the driving portion (51), and is a convex block protruding from the lower surface of the knob (50). The convex block applies a squeezing force to the elastic arm (32) to cause the elastic arm (32) to contract inwardly, thereby switching the meshing state or disengagement state between the ratchet pawl (33) and the gear tooth (21).

4. The rotation-controlled release clutch according to claim 3, characterized in that: The outer side wall of the elastic arm (32) is provided with a flange (34), and the inner side wall of the unlocking portion (52) is provided with a slot (521) matching the flange (34).

5. The rotation-controlled release clutch according to claim 3, characterized in that: The driving portion (51) and the unlocking portion (52) are staggered with respect to each other in the circumferential direction of the knob (50).

6. The rotation-controlled release clutch according to claim 1, characterized in that: The unlocking portion (52) is an arc-shaped groove formed by depression on the lower surface of the knob (50); the elastic arm (32) has a protrusion (321) extending toward the arc-shaped groove, and the protrusion (321) is embedded in the arc-shaped groove and slides in the arc-shaped groove. The arc-shaped groove radiates from a position close to the center of the knob (50) toward the periphery to guide the elastic arm (32) to deform, so that the pawl (33) and the gear tooth (21) are in a meshing state or a disengagement state.

7. The rotation-controlled release clutch according to claim 1, characterized in that: A rope bin (41) is circumferentially arranged at the lower end of the clutch output shaft (40) for a tether to be wound around an outer wall of the rope bin (41); a wire groove (411) is provided on the side wall of the rope bin (41), and a receiving cavity is provided inside the rope bin (41).

8. The rotation controlled release clutch according to claim 1, characterized in that: The clutch fixing chassis (10) comprises a bottom plate (11) and a cylindrical portion (12) arranged on the bottom plate (11), wherein the bottom plate (11) and the cylindrical portion (12) form a semi-open space for the clutch body (20) to be placed in the semi-open space.

9. The rotation-controlled release clutch according to claim 1, characterized in that: The number of the elastic arms (32) is two or three, the number of the driving parts (51) is the same as the number of the elastic arms (32), and the number of the unlocking parts (52) is the same as the number of the elastic arms (32).

10. The rotation controlled release clutch according to any one of claims 1 to 9, characterized in that: The rotation control tightness clutch is used on shoes to adjust the tightness of shoe ropes.

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