Safety belt clutch and automobile

Abstract

The invention discloses a safety belt clutch and an automobile, the safety belt clutch comprises: a base, the surface of which is provided with a groove; the friction piece is arranged in the groove, the friction piece is in friction connection with the base through a first elastic piece, and a friction piece blocking piece is arranged on the friction piece; the driving piece abuts against the friction piece, and a driving piece blocking piece matched with the friction piece blocking piece is arranged on the driving piece; the turbine abuts against the driving piece, and a turbine blocking piece matched with the driving piece blocking piece is arranged on the turbine; the pawl is rotatably arranged on the turbine; teeth clamped with the pawls are arranged on the periphery of the ratchet wheel; and a second elastic member. According to the safety belt clutch and the automobile, the pawl can be driven to be meshed with the ratchet wheel through rotation of the turbine, so that torque can be increased, the friction piece and the turbine are driven to synchronously rotate and reversely rotate, separation of the pawl and the ratchet wheel can be achieved, when the safety belt clutch is applied to tightening of a safety belt, rapidness and reliability are achieved, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile safety belts, and more specifically, to a safety belt clutch. In addition, the present invention also relates to an automobile comprising the safety belt clutch. Background Art

[0002] The existing seat belt assembly has added reversible electric webbing pretensioning on the basis of the original passive seat belt function. The specific structure can be referred to CN102666215B, a seat belt retractor, which uses double locking claws (clamping components), and cannot ensure the synchronization of locking and unlocking. It may cause only one pawl to be locked and one pawl to be unlocked, resulting in small transmission torque or jamming. The recovery of the locking claw (clamping component) relies on the motor-driven annular spring to push it back, which requires a long motor running time and a large unlocking displacement, resulting in a long time required for unlocking and generating a large noise, which reduces the user experience of the seat belt assembly.

[0003] In summary, how to improve the user experience is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a seat belt clutch, which can make the pawl and the ratchet wheel be in a coupled or separated state under the drive of the turbine, and the turbine can drive the separate pawl to engage with the ratchet wheel and realize synchronous rotation, thereby improving the user experience.

[0005] Another object of the present invention is to provide a vehicle comprising the above-mentioned seat belt clutch.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A seat belt clutch, comprising:

[0008] A base, the surface of which is provided with grooves;

[0009] A friction member is disposed in the groove, the friction member is frictionally connected to the base through a first elastic member, and a friction member blocking member is provided on the friction member;

[0010] A driving member abutting against the friction member, wherein the driving member is provided with a driving member blocking member matching the friction member blocking member;

[0011] A turbine, disposed in contact with the driving member, and provided with a turbine blocking member matching the driving member blocking member;

[0012] A ratchet pawl is rotatably disposed on the turbine, and a latching tooth is disposed on the ratchet pawl;

[0013] A ratchet wheel is arranged in the groove, and the outer periphery of the ratchet wheel is provided with teeth engaged with the ratchet pawl;

[0014] The second elastic member has two ends connected to the driving member and the turbine respectively.

[0015] Preferably, a sliding block is provided on the side of the pawl facing the driving member, and the driving member is provided with a sliding groove extending along its circumference, and the sliding block is provided in the sliding groove and can slide along the sliding groove.

[0016] Preferably, a through hole is provided at the center of the groove, the friction member, the driving member, the turbine and the ratchet are all annular structures and are coaxially arranged, and an annular cover plate is correspondingly provided on the groove.

[0017] Preferably, it further comprises a retractor, on which a moving shaft is arranged, and the moving shaft passes through the through hole, the friction member, the driving member, the turbine and the ratchet.

[0018] Preferably, the friction member is provided with a notch, and the first elastic member in a compressed state is provided at the notch.

[0019] Preferably, the friction member blocking member is a block structure arranged on the inner periphery of the friction member, the driving member blocking member includes a U-shaped cover-shaped structure facing the base and a block structure arranged on the outside of the U-shaped cover-shaped structure, the friction member blocking member is arranged on the inner periphery of the U-shaped cover-shaped structure, and the friction member blocking member can move between the two side wall surfaces inside the U-shaped cover-shaped structure, and two turbine blocking members are provided, and the turbine blocking member is arranged on the side surface of the turbine facing the base, and the driving member blocking member is arranged between the two turbine blocking members.

[0020] Preferably, a third elastic member is provided between the cover plate and the pawl.

[0021] Preferably, it further comprises a control system, a driving circuit and a deceleration device are arranged on the base, and the control system is electrically connected to the driving circuit, the deceleration device and the retractor.

[0022] Preferably, the pawl is an arc-shaped structure, and at least three teeth are arranged on the inner circumference of the pawl.

[0023] A car comprises a seat belt clutch, wherein the seat belt clutch is any one of the seat belt clutches described above.

[0024] The invention provides a safety belt clutch, wherein a groove is provided on the base of the clutch, and a friction member, a driving member, a turbine, a pawl and a ratchet are sequentially provided in the groove, the friction member is frictionally connected to the base through a first elastic member, and a driving member blocking member provided on the driving member can rotate relative to the friction member blocking member provided on the friction member before the two contact each other. When the turbine is driven to rotate clockwise, the turbine pushes the pawl to rotate synchronously with the driving member until the friction member blocking member contacts the driving member blocking member. At this time, due to the large friction force between the friction member and the base, the driving member stops rotating, while the turbine continues to rotate. The driving member can move the pawl during the rotation of the turbine, so that the pawl rotates relative to the turbine and engages with the ratchet. At this time, the driving member blocking member The abutment between the blocking member and the turbine blocking member allows the turbine, pawl and ratchet to rotate synchronously, thereby driving the friction component to rotate synchronously. When the turbine rotates counterclockwise, the turbine can drive the pawl to rotate synchronously, and the ratchet and pawl are engaged, and the two will not separate at the beginning. During the counterclockwise rotation, the driving member is pushed by the pawl to move and a gap is created between the friction member and the blocking member. At the moment when the teeth on the pawl disengage from the ratchet, the driving disk can be pulled to rotate through the second elastic member. The gap between the driving member and the friction member can be used as a rotation space, so that the driving disk can quickly drive the pawl to separate from the ratchet. The seat belt clutch proposed in the present application is faster and more reliable when applied to the seat belt assembly than the prior art, and can significantly improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 An exploded view of the seat belt clutch provided by the present invention;

[0027] Figure 2 A cross-sectional view of a safety belt clutch provided by the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the pawl and the ratchet wheel provided by the present invention in a separated state;

[0029] Figure 4 This is a schematic diagram of the structure of the pawl and the ratchet wheel provided by the present invention in a locked state;

[0030] Figure 5 A partial cross-sectional view of a safety belt clutch provided by the present invention;

[0031] Figure 6A schematic diagram of the structure of a safety belt clutch provided by the present invention;

[0032] Figure 7 It is a schematic diagram of the structure in which the friction member and the driving member of the present invention are installed on the base;

[0033] Figure 8 for Figure 3 A magnified view of part A;

[0034] Fig. 9 for Figure 3 The structural diagram of the other side;

[0035] Fig.10 is a schematic structural diagram of a second friction member in an embodiment of the present invention;

[0036] Fig.11 for Fig.10 Schematic diagram of the structure of the seat belt clutch corresponding to the middle friction part.

[0037] Reference numerals:

[0038] 1-base; 2-friction member; 3-driving member; 4-turbine; 5-pawl; 6-ratchet; 7-cover plate; 8-retractor; 9-moving shaft; 10-first elastic member; 11-second elastic member; 12-third elastic member; 13-friction member blocking member; 14-driving member blocking member; 15-turbine blocking member; 16-reduction device; 17-slider. DETAILED DESCRIPTION

[0039] 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.

[0040] The core of the present invention is to provide a safety belt clutch, which can ensure the synchronization of locking and unlocking of the pawl and the ratchet, ensure the transmission of torque, ensure safety and improve the user experience.

[0041] Another core of the present invention is to provide a car comprising the above-mentioned seat belt clutch.

[0042] It should be noted that the directions or positional relationships indicated by “upper”, “lower”, “front”, “back”, etc. are based on the directions 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 device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0043] The present application provides a safety belt clutch, comprising: a base 1, a friction member 2, a driving member 3, a turbine 4, a pawl 5 and a ratchet 6;

[0044] Wherein, the surface of the base 1 is provided with a groove;

[0045] The friction member 2 is arranged in the groove, the friction member 2 is frictionally connected with the base 1 through the first elastic member 10, and a friction member blocking member 13 is arranged on the friction member 2;

[0046] The driving member 3 is in contact with the friction member 2, and a driving member blocking member 14 matching with the friction member blocking member 13 is provided on the driving member 3;

[0047] The turbine 4 is disposed in contact with the driving member 3, and a turbine stopper 15 matching the driving member stopper 14 is disposed on the turbine 4;

[0048] The ratchet 5 is rotatably arranged on the turbine 4, and a latching tooth is arranged on the ratchet 5;

[0049] The ratchet wheel 6 is arranged in the groove, and the outer periphery of the ratchet wheel 6 is provided with teeth engaged with the pawl 5 .

[0050] For details, please refer to the attached Figure 1 , Attachment Figure 3 With attached Figure 4 A groove is provided on the base 1, and a friction member 2, a driving member 3, a turbine 4, a pawl 5 and a ratchet 6 are arranged in the groove in order from near to far from the bottom of the groove. The friction member 2 is frictionally connected to the base 1 through a first elastic member 10. When the driving force applied to the friction member 2 is less than the static friction force between the friction member 2 and the base 1, the friction member 2 will not rotate. When the driving force applied to the friction member 2 is greater than the static friction force between the friction member 2 and the base 1, the friction member 2 will rotate. The driving member 3 is coupled with the friction member 2, and a friction member blocking member 13 is provided on the friction member. A driving member blocking member 14 is provided on the driving member 3. The friction member blocking member 13 is limited by the driving member blocking member 14. When the turbine 4 drives the driving member 3 to rotate clockwise, the driving member 3 will first rotate slightly along with the turbine 4. When the friction member blocking member 13 abuts against the driving member blocking member 14, the driving member 3 stops rotating. During the rotation of the turbine 4, the pawl 5 can be driven to rotate synchronously. The pawl 5 is deflected by the driving member until it is engaged with the ratchet 6. After the engagement is completed, the driving member blocking member 14 abuts against the turbine blocking member 15. During the rotation of the turbine 4, the driving member 3 and the ratchet 6 can be driven to rotate synchronously. It should be noted that due to the action of the pawl 5, power begins to be transmitted between the pawl 5 and the ratchet 6, so that the driving force exerted on the friction member 2 is greater than the static friction between the friction member 2 and the base 1, and the friction member 2 and the turbine 4 can rotate synchronously, that is, the rapid locking of the pawl 5 and the ratchet 6 is realized, and it can ensure that the transmitted torque is large, thereby avoiding jamming.

[0051] On the basis of the above embodiment, a second elastic member 11 is provided on the driving member 3, and the two ends of the second elastic member 11 are respectively connected to the driving member 3 and the turbine 4. A slider 17 is provided on the side of the pawl 5 facing the driving member 3, and a slide groove extending along the circumference of the driving member 3 is provided on the driving member 3. The slider 17 is provided in the slide groove and can slide along the slide groove.

[0052] For details, please refer to the attached Figure 3 , Attachment Figure 4 , Attachment Figure 7 With attached Figure 8 The driving member 3 is provided with a column perpendicular to the base 1, and the turbine 4 is also provided with a column perpendicular to the base 1. The two ends of the second elastic member 11 are respectively connected to the two columns. When the pawl 5 and the ratchet 6 are engaged with each other (the initial state is regarded as the stopped state), when the turbine 4 rotates counterclockwise, the turbine 4 drives the pawl 5 to rotate counterclockwise. The pawl 5 and the ratchet 6 will not be separated in the initial state. In the process of being driven by the pawl 5, a gap is generated between the driving member 3 and the friction member blocking member 13. The second elastic member 11 is always in a stretched state. A slider 17 is provided, and a slide groove arranged along the circumferential direction is provided on the driving member 3. The slider 17 is generally arranged in the slide groove to ensure that the driving member 3 and the pawl 5 can rotate synchronously. When the pawl 5 is engaged with the ratchet 6, the second elastic member 11 can pull the driving member 3 to rotate slightly clockwise, and the slide groove on the driving member 3 drives the slider 17 to slide to a position close to the periphery. When the slider 17 is out of the slide groove, the engaging groove arranged on the driving member 3 can realize the engaging of the slider 17, so that the pawl 5 and the ratchet 6 are completely disengaged. The displacement of the entire unlocking process is smaller than that of the prior art, and the unlocking time is greatly reduced.

[0053] It should be noted that in addition to the driving member blocking member 14, the outer periphery of the driving member 3 is also provided with a protrusion, and in addition to the turbine blocking member 15, the inner periphery of the turbine 4 is also provided with a limit block, the slide groove is arranged between the turbine blocking member 15 and the limit block, and the driving member blocking member 14 and the protrusion are both arranged between the turbine blocking member 15 and the limit block, which can limit the rotation range of the driving member 3.

[0054] Optionally, both the first elastic member 10 and the second elastic member 11 may be springs, which are low in cost and easy to repair and replace.

[0055] In some embodiments, a through hole is provided at the center of the groove, the friction member 2, the driving member 3, the turbine 4 and the ratchet 6 are all annular structures and are coaxially arranged, and an annular cover plate 7 is also correspondingly arranged on the groove.

[0056] Specifically, the groove is a cylindrical groove, and the friction member 2, the driving member 3, the turbine 4 and the ratchet 6 are all annular structures to facilitate the installation of the driving device. The setting of the cover plate 7 cooperates with the driving device to seal the aforementioned components in the groove to prevent dust from falling on the components, thereby increasing the service life of each component.

[0057] Optionally, the cover plate 7 may be provided with perforations to facilitate adding lubricating liquid into the grooves, so as to increase the service life of each component.

[0058] On the basis of the above embodiment, it further includes a retractor 8 , on which a movable shaft 9 is arranged, and the movable shaft 9 penetrates through the through hole, the friction member 2 , the driving member 3 , the turbine 4 and the ratchet 6 .

[0059] Specifically, the output end of the retractor 8 is provided with a moving shaft 9, the turbine 4 can drive the moving shaft 9, the friction member 2, the driving member 3, the turbine 4 and the ratchet 6 are arranged coaxially with the through hole in the groove above by the moving shaft 9, and the detailed arrangement relationship can be referred to in the attached Figure 2 As shown, the retractor 8 is suitable for the retracting process of the seat belt. For the specific implementation process, reference may be made to the technical content of the subsequent coordination between the control system and the retractor 8.

[0060] On the basis of the above embodiment, a notch is provided on the friction member 2, and a first elastic member 10 in a compressed state is provided at the notch.

[0061] For details, please refer to the attached Figure 7 The friction member 2 is a circular ring structure and is provided with a notch. Both ends of the notch are smooth arc-shaped ends. The first elastic member 10 is generally a spring. The arc-shaped ends of both ends of the notch can be inserted into the inner circumference of the spring. Support platforms are also provided at both ends of the notch. The size of the support platform is larger than that of the arc-shaped end. The support platform can support the first elastic member 10. The spring can be installed in the notch in a compressed state with the arc-shaped end. The first elastic member 10 can squeeze the friction member 2 toward both ends and frictionally connect the friction member 2 to the groove of the base 1.

[0062] In some embodiments, the friction member blocking member 13 is a block structure arranged on the inner periphery of the friction member 2, the driving member blocking member 14 includes a U-shaped cover-shaped structure facing the base 1 and a block structure arranged on the outside of the U-shaped cover-shaped structure, the friction member blocking member 13 is arranged on the inner periphery of the U-shaped cover-shaped structure, and the friction member blocking member 13 can move between the two side wall surfaces inside the U-shaped cover-shaped structure. Two turbine blocking members 15 are provided, and the turbine blocking members 15 are arranged on the side surface of the turbine 4 facing the base 1, and the driving member blocking member 14 is arranged between the two turbine blocking members 15.

[0063] For details, please refer to the attached Figure 7 With attached Fig. 9, the friction member stopper 13 is arranged on the inner circumference of the friction member 2 and is in a block structure. The driving member 3 is arranged on the inner circumference of the friction member 2. There are two driving member stoppers 14 arranged on the outer circumference of the driving member 3. There is a certain included angle between the two driving member stoppers 14. One of the driving member stoppers 14 is in a block structure, and the other is in a U-shaped cover structure. The opening direction of the cover structure extends from the inner circumference to the outer circumference of the driving member 3. The friction member stopper 13 is arranged inside the cover structure, and the cover structure has a certain arc, so that the friction member stopper 13 can rotate inside the cover structure and is restricted by the two side walls of the cover structure. It should be noted that the included angle between the two driving member stoppers 14 is an acute angle. For the turbine stopper 15, there are two turbine stoppers 15, so that the two driving member stoppers 14 are both arranged between the two turbine stoppers 15.

[0064] On the basis of the above embodiment, a third elastic member 12 is arranged between the cover plate 7 and the pawl 5.

[0065] Specifically, a third elastic member 12 is arranged between the cover plate 7 and the pawl 5. Generally speaking, the third elastic member 12 is an elastic gasket. The elastic gasket is used to squeeze the pawl 5 to eliminate the movement clearance of the pawl 5, so as to suppress noise. The part where the elastic gasket squeezes the pawl 5 should be arranged on the rotation axis of the pawl 5, and it will not have any impact on the pawl except that the friction force increases.

[0066] On the basis of the above embodiment, a control system is further included. A drive circuit and a reduction device 16 are arranged on the base 1. The control system is electrically connected to the drive circuit, the reduction device 16, and the retractor 8.

[0067] Specifically, the reduction device 16 generally selects a reduction gear. The reduction gear can increase the torque of the retractor 8. The control system can control the drive circuit. The control system can receive relevant signals of the whole vehicle (such as lane departure, throttle and brake opening, vehicle attitude and other information), and after calculation, control the drive circuit, the reduction device 16 and the retractor 8. In other highly dynamic scenarios such as pre-collision, it can automatically complete reverse pre-tensioning of the webbing, reduce the displacement of the occupant, enhance the protection of the occupant, and at the same time support automatic emergency braking and emergency steering assistance to reduce the displacement of the passenger.

[0068] On the basis of the above embodiment, the pawl 5 is in an arc structure, and at least three teeth are arranged on the inner circumference of the pawl 5.

[0069] Specifically, at least three teeth are arranged on the pawl 5 so that the pawl 5 can better mesh with the ratchet wheel 6 to ensure the stable and reliable structure when the pawl 5 drives the ratchet wheel 6 to rotate. For the pawl 5, the number of teeth arranged on it can be adjusted according to its arc and size, and no too detailed limitation is made here.

[0070] In some embodiments, the friction member 2 is an annular component, and the friction member 2 is arranged to fit the inner wall of the groove of the base 1 or to fit the outer periphery of the hole in the groove.

[0071] Specifically, the friction member 2 in the above text is a ring structure with a notch, and its structure can be referred to in the attached Fig. 9 , the first elastic member 10 is in a compressed state, and the first elastic member 10 can squeeze the two ends of the notch of the friction member 2, so that the side wall of the friction member 2 can abut against the side wall of the groove. Under the action of the first elastic member 10, the static friction between the side wall of the friction member 2 and the side wall of the groove reaches a relatively large value. In addition, the friction member 2 in the present application can choose another setting method. This friction member 2 is also an annular structure with a notch. Since a perforation is provided in the groove, an annular protrusion extending along the axial direction is provided at the perforation. The friction member 2 is sleeved on the outer periphery of the annular protrusion and fits with the annular protrusion. At this time, the first elastic member 10 is in a normal tensile state. The first elastic member 10 can pull the two ends of the notch, so that the static friction between the inner periphery of the friction member 2 and the outer periphery of the annular protrusion is at a relatively large value. This setting method can be specifically referred to in the attached Fig.10 With attached Fig.11 It should be noted that, for this arrangement, a friction member blocking member 13 is arranged on the periphery of the friction member 2, and a driving member blocking member 14 arranged on the driving member 3 is a U-shaped cover-like structure with an opening inward along the circumferential direction, that is, it is arranged in a completely opposite direction to the opening direction of the aforementioned U-shaped cover-like structure. For other structures, basically no changes are made, and the aforementioned technical means can also be achieved. This embodiment also belongs to the protection scope of the present application and will not be described in detail.

[0072] In addition to the above-mentioned seat belt clutch, the present invention also provides a car including the seat belt clutch disclosed in the above-mentioned embodiment. For the structures of other parts of the car, please refer to the prior art and will not be described in detail herein.

[0073] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0074] The above is a detailed introduction to a seat belt clutch and a car provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A seat belt clutch, characterized in that: Comprising: A base (1) with a groove provided on its surface; A friction member (2) disposed in the groove, the friction member (2) being frictionally connected to the base (1) through a first elastic member (10), and a friction member stopper (13) being provided on the friction member (2); A driving member (3) abutting against the friction member (2), and a driving member stopper (14) matching the friction member stopper (13) being provided on the driving member (3); A turbine (4) disposed in abutting connection with the driving member (3), and a turbine stopper (15) matching the driving member stopper (14) being provided on the turbine (4); A pawl (5) rotatably disposed on the turbine (4), and engaging teeth being provided on the pawl (5); A ratchet wheel (6) disposed in the groove, and teeth engaging with the pawl (5) being provided on the outer periphery of the ratchet wheel (6); A second elastic member (11) with its two ends respectively connected to the driving member (3) and the turbine (4).

2. The seat belt clutch according to claim 1, characterized in that: A slider (17) is provided on one side of the pawl (5) facing the driving member (3), a chute extending along its circumferential direction is provided on the driving member (3), and the slider (17) is disposed in the chute and can slide along the chute.

3. The seat belt clutch according to claim 1, characterized in that: A through hole is provided at the center of the groove, the friction member (2), the driving member (3), the turbine (4) and the ratchet wheel (6) are all annular structures and are coaxially disposed, and an annular cover plate (7) is correspondingly provided on the groove.

4. The seat belt clutch according to claim 3, characterized in that: A retractor (8) is further included, a moving shaft (9) is provided on the retractor (8), and the moving shaft (9) penetrates through the through hole, the friction member (2), the driving member (3), the turbine (4) and the ratchet wheel (6).

5. The seat belt clutch according to claim 4, characterized in that: A notch is provided on the friction member (2), and the first elastic member (10) in a compressed state is provided at the notch.

6. The seat belt clutch according to claim 1, characterized in that: The friction member stopper (13) is a block-shaped structure disposed on the inner circumference of the friction member (2), the driving member stopper (14) includes a U-shaped cover-shaped structure facing the base (1) and a block-shaped structure disposed outside the U-shaped cover-shaped structure, the friction member stopper (13) is disposed on the inner circumference of the U-shaped cover-shaped structure, the friction member stopper (13) can move between two side wall surfaces inside the U-shaped cover-shaped structure, two turbine stoppers (15) are provided, the turbine stoppers (15) are disposed on the surface of the turbine (4) facing the base (1), and the driving member stopper (14) is disposed between the two turbine stoppers (15).

7. The seat belt clutch according to claim 3, characterized in that: A third elastic member (12) is provided between the cover plate (7) and the pawl (5).

8. The seat belt clutch according to claim 4, characterized in that: A control system is further included, a driving circuit and a reduction device (16) are provided on the base (1), and the control system is electrically connected to the driving circuit, the reduction device (16) and the retractor.

9. The seat belt clutch according to any one of claims 1 to 8, characterized in that: The pawl (5) is an arc-shaped structure, and at least three teeth are provided on the inner circumference of the pawl (5).

10. An automobile, comprising a seat belt clutch, characterized in that: The seat belt clutch is the seat belt clutch according to any one of claims 1 to 9.

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