Clutch mechanism and retractor

Abstract

The utility model discloses a clutch mechanism and a retractor, the clutch mechanism comprises: a driven gear, which is in transmission connection with a motor, one side surface of the driven gear is provided with a smooth guide rail and a driving rib, and the middle part of the driven gear is provided with a through hole; the clutch disc and the driven gear are coaxially arranged, and the clutch disc is arranged on the side, provided with the guide rail, of the driven gear; the clutch transmission wheel is used for being in transmission connection with a mandrel assembly of the retractor and is arranged in the penetrating hole; the locking claw is arranged between the driven gear and the clutch disc, the first end of the locking claw and the clutch disc are rotatably arranged, a tooth part is arranged on the side, facing the axis of the driven gear, of the second end of the locking claw, a guide shaft is arranged on the side, facing the driven gear, of the second end of the locking claw, and the guide shaft extends into the guide rail. By arranging the guide rail and a related structure, the problem that the clutch cannot be separated clearly is solved under the forced guiding action of the guide rail.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle safety engineering, in particular to a clutch mechanism and a retractor. Background Art

[0002] With the development of the automobile industry and the increasing number of cars, traffic accidents are also increasing. The existing seat belt retractors are driven by motors, which work under the control of ECU (Electronic Control Unit, also known as driving computer, on-board computer). Before a possible collision, the motor can drive the seat belt retractor to retract a certain amount of seat belts to protect the driver.

[0003] The motor and the core shaft assembly of the seat belt retractor are connected through a clutch transmission. There are various types of existing clutches, which have more or less one or more of the following problems: large clutch delay, poor synchronization of internal and external teeth, large impact vibration noise, unclear (incomplete) separation, etc. Utility Model Content

[0004] Therefore, the utility model provides a clutch mechanism and a retractor to solve the problem of unclear (incomplete) clutch separation.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A first aspect of the present application provides a clutch mechanism, comprising:

[0007] A passive gear is connected to the motor in transmission, a side surface of the passive gear is provided with a smooth guide track and a driving rib, a first end of the guide track is closer to the axis of the passive gear than a second end and the guide track is not parallel to the radial direction of the passive gear, the driving rib is provided at the edge of the first end of the guide track, and a through hole is provided in the middle of the passive gear;

[0008] A clutch disc, coaxially arranged with the passive gear and arranged on a side of the passive gear where the guide track is arranged;

[0009] A clutch transmission wheel, used for transmission connection to the mandrel assembly of the retractor, is arranged in the penetration hole;

[0010] A locking pawl is arranged between the driven gear and the clutch disk, the first end of the locking pawl is rotatably arranged with the clutch disk, the second end of the locking pawl is provided with a tooth portion on the side facing the axis of the driven gear and the second end is provided with a guide shaft on the side facing the driven gear, the guide shaft extends into the guide track, when the guide shaft is at the first end of the guide track, the tooth portion is meshed with the clutch transmission wheel, and the end of the second end of the locking pawl is abutted against the driving rib.

[0011] Furthermore, the clutch mechanism also includes a friction spring and a cover, wherein the friction spring is installed on the side of the cover facing the clutch disc, and the side of the clutch disc facing the cover is provided with a protruding wheel-shaped structure, and a friction groove is provided on the circumference of the wheel-shaped structure, and a part of the friction spring is abutted against the friction groove, and the friction spring is used to provide friction force to hinder the rotation of the clutch disc.

[0012] Furthermore, the clutch mechanism also includes a limiting plate, which is arranged on a side of the clutch disc away from the passive gear, and a connecting plate is arranged on the edge of the limiting plate, and the connecting plate is connected to the passive gear. The limiting plate and the passive gear package the clutch disc and the locking claw inside.

[0013] Furthermore, the clutch mechanism also includes a transmission gear set, and the motor is transmission-connected to the passive gear via the transmission gear set.

[0014] Furthermore, the guide track is an arc-shaped guide groove, and the arc center of the guide groove is arranged toward a side close to the axis of the passive gear.

[0015] Furthermore, a accommodating cavity and a rotating shaft cavity communicated with the accommodating cavity are provided on the side of the clutch disc facing the driven gear, a pivot shaft is provided at the first end of the locking claw, the pivot shaft is adapted to be installed in the rotating shaft cavity, and the second end of the locking claw is in the accommodating cavity.

[0016] Furthermore, a mounting cavity is provided on a side of the driven gear facing the clutch disc, the clutch disc and the locking claw are both arranged in the mounting cavity, and the driving rib is arranged in the mounting cavity and protrudes into the accommodating cavity.

[0017] Furthermore, the locking claws, guide rails and driving ribs are provided in plurality, and the plurality of locking claws, guide rails and driving ribs are arranged in one-to-one correspondence.

[0018] Furthermore, the clutch transmission teeth and the tooth portion are a ratchet tooth structure.

[0019] A second aspect of the present application provides a retractor, which includes the clutch mechanism provided in the first aspect of the present application.

[0020] The utility model has the following advantages:

[0021] The motor works under the control of the on-board computer. When the motor rotates forward, it drives the passive gear to rotate. Under the compulsory guiding action of the guide track, the second end of the locking claw approaches the central part of the passive gear, so that the tooth portion of the locking claw meshes with the clutch transmission wheel, and the second end of the locking claw abuts against the driving rib. At this time, the clutch is in a "closed" state; when the motor is reversed, it drives the passive gear to rotate. Under the compulsory guiding action of the guide track, the second end of the locking claw is away from the central part of the passive gear, so that the tooth portion of the locking claw is separated from the clutch transmission wheel, and the second end of the locking claw is separated from the driving rib. At this time, the clutch is in a "closed" or "separated" state; by setting the guide track and related structures, the problem of unclear clutch separation is solved under the compulsory guiding action.

[0022] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0025] Figure 1 A schematic diagram of the structure of a clutch mechanism and a retractor installed together provided by an embodiment of the utility model;

[0026] Figure 2 A schematic diagram of the structure of a clutch mechanism and a mandrel assembly of a retractor provided in an embodiment of the utility model when installed together;

[0027] Figure 3A schematic diagram of the structure of a clutch transmission wheel of a clutch mechanism provided by an embodiment of the utility model and a core shaft assembly of a retractor when installed together;

[0028] Figure 4 A schematic diagram of the structure of a clutch mechanism provided by an embodiment of the utility model with the cover removed;

[0029] Figure 5 A schematic diagram of the structure of a clutch mechanism provided by an embodiment of the utility model in a "closed" state after the cover, friction spring and cover are removed;

[0030] Figure 6 for Figure 5 A schematic diagram of the structure of a clutch mechanism with the clutch disc removed is shown;

[0031] Figure 7 A schematic diagram of the structure of a clutch mechanism provided by an embodiment of the utility model in a "disengaged" state after the cover, friction spring and cover are removed;

[0032] Figure 8 for Figure 7 A schematic diagram of the structure of a clutch mechanism with the clutch disc removed is shown;

[0033] Fig. 9 A schematic diagram of the structure of a passive gear of a clutch mechanism provided in an embodiment of the utility model;

[0034] Fig.10 A schematic structural diagram of a clutch disc of a clutch mechanism provided by an embodiment of the utility model, facing the passive gear;

[0035] Fig.11 A schematic structural diagram of a clutch disc of a clutch mechanism provided in an embodiment of the utility model, on a side facing away from a driven gear;

[0036] Fig.12 A schematic diagram of a structure in which a locking claw of a clutch mechanism provided in an embodiment of the utility model is installed on a clutch disc;

[0037] Fig.13 A schematic structural diagram of a locking claw of a clutch mechanism provided in an embodiment of the utility model;

[0038] Fig.14 A schematic diagram of the structure of a friction spring of a clutch mechanism provided in an embodiment of the utility model;

[0039] Fig.15 A schematic structural diagram of a limit piece of a clutch mechanism provided in an embodiment of the utility model;

[0040] Fig.16A schematic structural diagram of a friction spring of a clutch mechanism provided in an embodiment of the utility model being installed on a cover.

[0041] In the figure: 100-clutch mechanism, 110-motor, 111-transmission gear set, 120-passive gear, 121-guide track, 122-driving rib, 123-through hole, 124-installation cavity, 130-clutch plate, 131-wheel structure, 132-friction groove, 133-accommodating cavity, 134-rotating shaft cavity, 140-clutch transmission wheel, 150-locking claw, 151-tooth portion, 152-guide shaft, 153-pivot shaft, 160-friction spring, 170-cover, 180-limiting plate, 181-connecting plate, 182-window, 200-retractor, 210-core shaft assembly. DETAILED DESCRIPTION

[0042] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0043] like Figure 1-16 As shown, this embodiment provides a clutch mechanism 100, including a driven gear 120, a clutch disc 30, a clutch transmission wheel 140 and a locking claw 150, wherein the driven gear 120, the clutch disc 30 and the clutch transmission wheel 140 are coaxially arranged.

[0044] The passive gear 120 is connected to the motor 110 by transmission. For example, the motor 110 is connected to the passive gear 120 by transmission gear set 111. The motor 110 works under the control of the on-board computer. For example, the motor 110 is a servo motor, a stepper motor or a reduction motor. Preferably, the servo motor can accurately control the rotation angle or number of turns so as to accurately control the tightening degree of the seat belt.

[0045] A smooth guide track 121 is provided on the side of the passive gear 120 facing the clutch plate 30; in this embodiment, the guide track 121 is a guide groove that penetrates the thickness (width) of the passive gear 120, and the arc center of the guide groove is arranged toward the side close to the axis of the passive gear 120, that is, the arc direction of the guide groove is convex outward rather than convex inward. The first end of the guide track 121 is closer to the axis of the passive gear 120 than the second end, and the guide track 121 is not parallel to the radial direction of the passive gear 120 (refer to Figure 6 and 8As shown, the direction of the guide track 121 from the first end to the second end is an arc segment extending counterclockwise), so that the parts slidingly arranged along the guide track 121 (in this embodiment, the guide shaft 152 of the locking claw 150) will approach or move away from the center of the passive gear 120 (in this embodiment, the centripetal swing and centrifugal swing of the second end of the locking claw 150). A driving rib 122 is also provided on the side of the passive gear 120 facing the clutch disk 30; in this embodiment, the driving rib 122 is a protrusion-like structure. The driving rib 122 is arranged at the edge of the first end of the guide track 121. A through hole 123 is provided in the middle of the passive gear 120. The through hole 123 is used to rotatably fix the passive gear 120 on the one hand, and to accommodate the clutch transmission wheel 140 on the other hand.

[0046] The clutch disc 30 is disposed on one side of the driven gear 120 where the guide track 121 is disposed.

[0047] The clutch transmission wheel 140 is arranged in the through hole 123, and is used for transmission connection with the spindle assembly 210 of the retractor 200. Exemplarily, the clutch transmission wheel 140 is installed at the end of the spindle assembly 210.

[0048] The locking pawl 150 is disposed between the driven gear 120 and the clutch disc 30. The first end of the locking pawl 150 is rotatably disposed with the clutch disc 30. A tooth portion 151 is disposed on one side of the second end of the locking pawl 150 facing the axis of the driven gear 120, and after the locking pawl 150 swings centripetally, the tooth portion 151 can mesh with the clutch transmission wheel 140. A guide shaft 152 is provided on the side of the second end of the locking claw 150 facing the passive gear 120, and the guide shaft 152 extends into the guide track 121. In this way, when the passive gear 120 rotates and the clutch disk 30 is stationary, the second end of the locking claw 150 swings centripetally or centrifugally under the interaction of the guide shaft 152 and the guide track 121, and the first end of the locking claw 150 rotates in place. When the guide shaft 152 is at the first end of the guide track 121, the tooth portion 151 engages with the clutch transmission wheel 140, and the end of the second end of the locking claw 150 abuts against the driving rib 122.

[0049] The motor 110 rotates forward under the control of the on-board computer, driving the passive gear 120 to rotate counterclockwise. Under the action of the guide track 121, the second end of the locking claw 150 approaches the center part of the passive gear 120 (that is, the second end of the locking claw 150 swings centripetally), so that the tooth portion 151 of the locking claw 150 meshes with the clutch transmission wheel 140, and at the same time, the second end of the locking claw 150 abuts against the driving rib 122, so that the passive gear 120 can drive the clutch transmission wheel 140 to rotate, thereby rotating the core shaft assembly 210 of the retractor 200 to retract the webbing; the motor 110 rotates reversely under the control of the on-board computer, driving the passive gear 120 to rotate clockwise. Under the action of the guide track 121, the locking claw 150 The second end of the locking claw 150 is away from the central part of the passive gear 120 (that is, the second end of the locking claw 150 makes a centrifugal swing), so that the tooth portion 151 of the locking claw 150 is separated from the clutch transmission wheel 140, and the second end of the locking claw 150 is separated from the driving rib 122, so that the passive gear 120 no longer drives the clutch transmission wheel 140 to rotate, thereby allowing the spindle assembly 210 of the retractor 200 to release the webbing (release is a function of the retractor 200. When the clutch mechanism 100 is separated from the spindle assembly 210, the spindle assembly 210 releases the webbing to its original state by the force of the winding spring); by providing the guide track 121 and related structures, the problem of unclear clutch separation is solved under the compulsory guiding action of the guide track 121. The motor 110 is controlled to rotate forward and reverse continuously, so the webbing is repeatedly wound and released, and the driver feels that the seat belt is repeatedly tightened and loosened, forming a vibration warning; during a collision warning, the on-board computer can control the motor 110 to rotate forward for a certain number of circles, continuously tighten the webbing, and then control the motor 110 to repeatedly rotate forward and reverse, that is: first tighten the seat belt, and then issue a vibration warning.

[0050] It should be noted that the clutch mechanism 100 is used in conjunction with the retractor 200, so they can share a frame, or a fixed structural member can be added to the frame of the retractor 200 as a new frame. In combination with the structure of this embodiment, the motor 110 is relatively fixed to the frame, and the driven gear 120, the clutch disc 30, and the clutch transmission wheel 140 can rotate around their own axis relative to the frame.

[0051] In one embodiment, the clutch mechanism 100 further includes a friction spring 160 and a cover 170. The friction spring 160 is installed on the side of the cover 170 facing the clutch disc 30. The side of the clutch disc 30 facing the cover 170 is provided with a protruding wheel-shaped structure 131, and the peripheral side of the wheel-shaped structure 131 is provided with a friction groove 132. A part of the friction spring 160 is against the friction groove 132, and the friction spring 160 is used to provide a friction force to hinder the rotation of the clutch disc 30. The cover 170 is fixed relative to the frame, so the position of the friction spring 160 is relatively unchanged relative to the frame. In the initial stage of the counterclockwise rotation of the passive gear 120, the clutch disc 30 does not rotate with the passive gear 120 due to the friction force limitation of the friction spring 160. After the second end of the locking claw 150 abuts against the driving rib 122, the passive gear 120 pushes the locking claw 150 to rotate counterclockwise. The first end of the locking claw 150 is rotatably connected to the clutch disc 30. At this time, the clutch disc 30 will overcome the friction force of the friction spring 160 and rotate synchronously with the passive gear 120. By providing the friction spring 160, the clutch disc 30 is prevented from rotating counterclockwise at the beginning of the counterclockwise rotation of the driven gear 120 (in this case, the second end of the locking claw 150 will not be able to make a centripetal swing, which will cause the clutch to fail to "engage" and fail to drive the spindle assembly 210 to rotate counterclockwise); similarly, when the driven gear 120 rotates clockwise, if the clutch disc 30 rotates accordingly, the clutch will fail to "disengage", and the friction force of the friction spring 160 will prevent the clutch disc 30 from rotating clockwise with the driven gear 120.

[0052] In one embodiment, a receiving cavity 133 and a shaft cavity 134 communicating with the receiving cavity 133 are provided on one side of the clutch disc 30 facing the driven gear 120, a pivot shaft 153 is provided on the first end of the locking claw 150, the pivot shaft 153 is adapted to be installed in the shaft cavity 134, and the second end of the locking claw 150 is in the receiving cavity 133. In this way, the first end of the locking claw 150 can rotate in situ, and the second end of the locking claw 150 can have space for centripetal and centrifugal swing.

[0053] In one embodiment, a mounting cavity 124 is provided on the side of the passive gear 120 facing the clutch disc 30, the clutch disc 30 and the locking claw 150 are both provided in the mounting cavity 124, and the driving rib 122 is provided in the mounting cavity 124 and protrudes into the accommodating cavity 133. The clutch mechanism 100 further includes a limiting plate 180, which is provided on the side of the clutch disc 30 away from the passive gear 120, and a connecting plate 181 is provided on the edge of the limiting plate 180, the connecting plate 181 is connected to the passive gear 120, and the limiting plate 180 and the passive gear 120 package the clutch disc 30 and the locking claw 150 inside. By providing the limiting plate 180, the clutch disc 30 and the locking claw 150 can be restricted in the mounting cavity 124 of the passive gear 120. Among them, a window 182 for the wheel-shaped structure 131 of the clutch disc 30 to pass through is provided in the middle of the limiting plate 180.

[0054] In one embodiment, the locking claw 150, the guide track 121 and the driving rib 122 are provided in plurality, and the plurality of locking claws 150, the guide track 121 and the driving rib 122 are provided in one-to-one correspondence. The one-to-one corresponding locking claws 150, the guide track 121 and the driving rib 122 are regarded as a set of locking structures. Preferably, the plurality of locking structures are provided in a centrally symmetrical manner with the center of the passive gear 120 or the clutch transmission wheel 140 as the center of the circle. In this way, the structural strength can be improved and the torque can be evenly distributed.

[0055] In one embodiment, the clutch transmission teeth and the tooth portion 151 are ratchet gear structures. Thus, when the power of the passive gear 120 needs to be transmitted to the spindle assembly 210 of the retractor 200, the power can be transmitted through the clutch transmission teeth and the tooth portion 151 of the ratchet gear structure, and after reversal, the clutch transmission teeth and the tooth portion 151 of the ratchet gear structure are also conducive to the separation of the tooth portion 151 and the clutch transmission wheel 140.

[0056] This embodiment further provides a retractor 200 , which includes the clutch mechanism 100 provided in the above embodiment.

[0057] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "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 application 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 application.

[0058] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] In this application, 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, an electrical connection, or a communication; 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 this application can be understood according to specific circumstances.

[0060] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0061] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0062] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A clutch mechanism, characterized in that: include: A passive gear is connected to the motor of the retractor by transmission, a side surface of the passive gear is provided with a smooth guide track and a driving rib, a first end of the guide track is closer to the axis of the passive gear than a second end and the guide track is not parallel to the radial direction of the passive gear, the driving rib is provided at the edge of the first end of the guide track, and a through hole is provided in the middle of the passive gear; A clutch disc, coaxially arranged with the passive gear and arranged on a side of the passive gear where the guide track is arranged; A clutch transmission wheel, used for transmission connection to the mandrel assembly of the retractor, is arranged in the penetration hole; A locking pawl is arranged between the driven gear and the clutch disk, the first end of the locking pawl is rotatably arranged with the clutch disk, the second end of the locking pawl is provided with a tooth portion on the side facing the axis of the driven gear and the second end is provided with a guide shaft on the side facing the driven gear, the guide shaft extends into the guide track, when the guide shaft is at the first end of the guide track, the tooth portion is meshed with the clutch transmission wheel, and the end of the second end of the locking pawl is abutted against the driving rib.

2. The clutch mechanism according to claim 1, characterized in that: The clutch mechanism also includes a friction spring and a cover, wherein the friction spring is installed on the side of the cover facing the clutch disc, and a protruding wheel-shaped structure is provided on the side of the clutch disc facing the cover, and a friction groove is provided on the circumference of the wheel-shaped structure, and a part of the friction spring is abutted against the friction groove, and the friction spring is used to provide friction force to hinder the rotation of the clutch disc.

3. The clutch mechanism according to claim 1, characterized in that: The clutch mechanism also includes a limiting plate, which is arranged on a side of the clutch disc away from the driven gear. A connecting plate is arranged on the edge of the limiting plate, and the connecting plate is connected to the driven gear. The limiting plate and the driven gear package the clutch disc and the locking claw inside.

4. The clutch mechanism according to claim 1, characterized in that: The clutch mechanism also includes a transmission gear set, and the motor is transmission-connected to the driven gear via the transmission gear set.

5. The clutch mechanism according to claim 1, characterized in that: The guide track is an arc-shaped guide groove, and the arc center of the guide groove is arranged toward a side close to the axis of the passive gear.

6. The clutch mechanism according to claim 1, characterized in that: A receiving cavity and a shaft cavity communicated with the receiving cavity are provided on the side of the clutch disc facing the driven gear; a pivot shaft is provided at the first end of the locking claw, the pivot shaft is adapted to be installed in the shaft cavity, and the second end of the locking claw is in the receiving cavity.

7. The clutch mechanism according to claim 6, characterized in that: A mounting cavity is provided on one side of the driven gear facing the clutch disc, the clutch disc and the locking claw are both arranged in the mounting cavity, and the driving rib is arranged in the mounting cavity and protrudes into the accommodating cavity.

8. The clutch mechanism according to claim 1, characterized in that: The locking claws, the guide rails and the driving ribs are provided in plurality, and the plurality of locking claws, the guide rails and the driving ribs are arranged in one-to-one correspondence.

9. The clutch mechanism according to claim 1, characterized in that: The clutch transmission teeth and the tooth portion are a ratchet tooth structure.

10. A retractor, characterized in that: Comprising the clutch mechanism as described in any one of claims 1-9.

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