KR20130019628A - Seat belt clutch and seat belt retractor - Google Patents

Abstract

PURPOSE: A seat belt clutch and a seat belt retractor are provided maintain to restrict the rotation of a spool coupled to the fixing latching member, thereby definitely restrict a passenger since the seat belt restricting the passenger is not loosened from the spool. CONSTITUTION: A seat belt clutch includes a clutch plate(22), a friction plate(24), a fixing latching member(23), a turning latching member(25), a pressurizing member(29), and a rotation preventing portion(24c). The fixing latching member between the clutch plate and the friction plate is coupled to a spool(10), and then is rotated with the spool. The turning latching member between the clutch plate and the friction plate is rotatably placed at the clutch plate. When the clutch plate is rotated, the turning latching member is rotated, and is guided by the friction plate, and then is latched or unlatched on the fixing latching member. The pressurizing member pressurizes the friction plate to be stuck to the turning latching member so that the turning latching member is guided by the friction plate. The rotation preventing portion(24c) is formed on the friction plate so that the rotation of the friction plate is restricted by the pressurizing member.

Description

Seat belt clutch and seat belt retractor}

The present invention relates to a seat belt clutch and a seat belt retractor, and more particularly, to a seat belt clutch and a seat belt retractor which is operated so that the seat belt is wound or unwound in a car accident so as not to be wound around the seat belt. will be.

In general, a vehicle is equipped with an airbag that is a safety device for preventing a passenger from directly injuring the structure of the vehicle in the event of an accident.

The airbag is designed to protect the passenger at an appropriate pressure when the distance between the airbag and the passenger is a specific distance.

However, in the event of a real car accident (collision), the passenger is pushed forward and the distance between the airbag and the passenger is close, and the passenger is injured by excessive initial pressure of the airbag or is still in full bloom. There is a fear that the airbag not protected by the proper pressure may not be protected.

Therefore, the vehicle is equipped with a seat belt for restraining the passenger sitting on the seat.

The seat belt is wound and mounted on the spool, and is released from the spool when pulled by the passenger, and is rewound to the spool when the pulling force is released.

However, in the event of an automobile accident (collision), the seat belt is pulled and released from the spool by the force that the passenger is pushed forward. Accordingly, the seat belt is loosened, and the passenger is pushed forward to be pushed forward with the airbag. There is a risk of getting closer.

In order to prevent this, the vehicle is equipped with a seat belt retractor which rotates the spool during an accident (collision) to wind the seat belt and restrains the rotation of the spool so that the seat belt is not loosened.

The problem to be solved by the present invention is that the seat belt is operated to wind or unwind, but in the event of an automobile accident, the seat belt is bound so as not to be unwound and the passenger is restrained, and the seat belt that restrains the passenger can be reliably prevented from being released. To provide a seat belt clutch and a seat belt retractor.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the seat belt clutch according to the embodiment of the present invention, a spool through which the seat belt is wound or unrolled, a clutch plate rotatable with respect to the spool, and a friction plate disposed to face the clutch plate And a fixed engaging member coupled to the spool between the clutch plate and the friction plate to rotate together with the spool, and rotatably disposed on the clutch plate between the clutch plate and the friction plate, and the clutch plate. Is rotated while being guided by the friction plate as it is rotated, and the locking member is caught or released from the fixed locking member, and the friction plate is rotated while being guided by the friction plate. Can be in close contact with the pivoting member A pressing member for pressing said friction plate, said friction plate is in engagement by the pressing member to rotate the restraint, the friction plate is formed to be non-rotating engaging part by the pressing member.

In addition, the seat belt retractor according to an embodiment of the present invention, the gear train is connected to the motor is rotated by the driving force of the motor, the ring gear meshed with the gear train, and the seat belt clutch disposed in the ring gear The seat belt clutch includes: a clutch plate fixed to the ring gear, a spool through which the seat belt is wound or unwound, rotatable about the spool, a friction plate disposed to face the clutch plate, and A fastening member coupled to the spool between the clutch plate and the friction plate to rotate with the spool, rotatably disposed on the clutch plate between the clutch plate and the friction plate, and the clutch plate being rotated. Is rotated under the guidance of the friction plate Pressurizing the friction plate so that the friction plate can be in close contact with the pivot member so that the pivot member can be rotated while being guided by the friction plate and the pivot member is caught or released by the latch member. It includes a member, the friction plate is formed by the pressing member to be locked by the pressing member, the rotation preventing portion is formed by the pressing member so that the rotation is constrained.

Specific details of other embodiments are included in the detailed description and drawings.

In the seat belt clutch and the seat belt retractor according to the present invention, since the rotation plate is restrained by the pressing member, the pivot locking member can be held in the fixed locking member, and thus is coupled to the fixed locking member. Since the rotation of the spool is kept constrained, the seat belt restraining the passenger is not released from the spool, thereby ensuring the restraint of the passenger.

The effects of the present invention are not limited to the above-mentioned effects, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of the seat belt retractor in accordance with an embodiment of the present invention,
2 is an exploded perspective view of a seat belt retractor according to an embodiment of the present invention;
3 is a cross-sectional view of the coupled state of the seat belt retractor according to an embodiment of the present invention,
4 is a view showing an assembling procedure of the clutch gear shown in FIG. 2;
5 and 6 is an operation of the clutch gear.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the seat belt clutch and the seat belt retractor according to the embodiment of the present invention will be described with reference to the drawings.

1 is an exploded perspective view of a seat belt retractor 100 according to an embodiment of the present invention, Figure 2 is an exploded perspective view of a seat belt retractor 100 according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention It is sectional drawing of the engagement state of the seat belt retractor by this.

1 to 3, the seat belt retractor 100 according to the embodiment of the present invention includes a spool 10, a clutch gear 20, and a gear train 30.

The spool 10 is a configuration in which the seat belt is wound or unwound and is supported by a rectangular cylindrical support bracket 1 to be rotatably disposed in the support bracket 1, and the rotating shaft 15 of the spool 10 is supported. It protrudes outward of the bracket 1.

The clutch gear 20 is connected to the rotating shaft 15 of the spool 10 to restrain or release the rotation of the spool 10. That is, when the spool 10 is restrained by the clutch gear 20, the seat belt is not released from the spool 10. When the spool 10 is restrained from the clutch gear 20, the seat belt is released. It can be released from the spool 10.

The clutch gear 20 includes a ring gear 21 and a seat belt clutch disposed in the ring gear 21 to restrain or release the rotation of the spool 10. Detailed description of the seat belt clutch will be described later.

The gear train 30 is connected to the motor 2 and rotated by the driving force of the motor 2. The gear train 30 meshes with the ring gear 21 of the clutch gear 20 to rotate the ring gear 21.

The gear train 30 in this embodiment consists of three spur gears. That is, the gear train 30 may include a motor gear 32 coupled to the rotation shaft 3 of the motor 2, a first sub gear 34 meshed with the motor gear 32 and rotated in opposite directions, and a first one. And a second subgear 36 which meshes with the subgear 34 and rotates in the opposite direction and which engages the ring gear 21. Here, the first subgear 34 has a gear having a large diameter and a gear having a small diameter, which is formed in a two-stage structure. That is, the first subgear 34 includes a first gear 33 having a larger diameter and engaging the motor gear 32, and a second gear 35 having a smaller diameter than the first gear 33. . The first gear 33 and the second gear 35 are formed concentrically and rotated at the same angle with each other. In addition, as shown in FIGS. 5 and 6, the second subgear 36 has a two-stage structure in which a gear having a large diameter and a gear having a small diameter are formed as one set, similar to the first sub gear 34. do. That is, the second subgear 36 has a larger diameter and is smaller in diameter than the third gear 37 and the third tooth 37 engaged with the second gear 35 of the first subgear 34. The fourth gear 38 is formed to be engaged with the ring gear 21. The third gear 37 and the fourth gear 38 are also formed concentrically and rotated at the same angle with each other.

Meanwhile, the gear housing 40 is disposed on the support bracket 1 on the surface on which the rotation shaft 15 of the spool 10 protrudes. The rotation shaft 15 of the spool 10 rotatably penetrates the gear housing 40.

In addition, the gear housing 40 is formed with a through hole 42 through which the rotating shaft 3 of the motor 2 passes. The motor 2 is disposed outside the gear housing 40, and after the rotation shaft 3 is disposed inside the gear housing 40 through the through hole 42, the motor 2 is screwed 4. It is coupled to the gear housing 40 through.

The gear train 30 is accommodated in the gear housing 40. The motor gear 32 is coupled to the rotation shaft 3 of the motor 2 and accommodated in the gear housing 40. In addition, the gear housing 40 has a first sub gear shaft 44 to which the first sub gear 34 is rotatably coupled, and a second sub gear shaft to which the second sub gear 36 is rotatably coupled ( 46 are formed respectively, and the first subgear 34 and the second subgear 36 are also accommodated in the gear housing 40.

The seat belt clutch includes a clutch plate 22 rotatable through the rotation shaft 15 of the spool 10 so as to rotate about the spool 10 and a rotation shaft of the spool 10 penetrating the clutch plate 22. 15 is fixed to the engaging member 23 and rotated together with the spool 10, the friction plate 24 disposed to face the clutch plate 22 with the fixing member 23 therebetween, clutch plate And a pivoting member 25 rotatably disposed on the clutch plate 22 between the 22 and the friction plate 24.

The clutch plate 22 is fixed inside the ring gear 21 and rotates together with the ring gear 21. The clutch plate 22 is formed in a circular shape so as to be inserted into the ring gear 21, and a through hole 22a through which the rotating shaft 15 of the spool 10 penetrates is formed at the center thereof.

The fixed engaging member 23 is provided with a plurality of teeth on the circumferential surface. The plurality of teeth are formed by bending all at once in the rotational direction of the spool 10 when the seat belt is released. The fixed locking member 23 has an insertion hole 23a for inserting and coupling the rotating shaft 15 of the spool 10 to the center thereof.

Meanwhile, a washer 26 is disposed between the clutch plate 22 and the fixed locking member 23 to prevent abrasion due to interference. The rotating shaft 15 of the spool 10 sequentially penetrates through the support bracket 1, the gear housing 40, the clutch plate 22, and the washer 26, and then inserts an insertion hole of the fixing member 23 ( It is inserted into the 23a) is coupled with the fixed locking member (23). Here, the rotating shaft 15 and the fixed locking member 23 of the spool 10 may be coupled to the key joint which is a representative coupling method of the gear and the shaft, but in this embodiment, the fitting coupling method for easy assembly. This applies. That is, the rotating shaft 15 of the spool 10 is made of a rectangular cross section and the insertion hole 23a of the fixed locking member 23 is also squared so that the fixed locking member 23 can be rotated together with the spool 10. Is formed.

The clutch plate 22 is formed with a protruding coupling shaft 22b to which the pivotal catching member 25 is rotatably coupled. The pivot catching member 25 is coupled to the coupling shaft 22b to be rotatable about the coupling shaft 22b.

The pivot catching member 25 is rotated or reversely rotated while being guided by the friction plate 24 as the clutch plate 22 is rotated or reversely rotated so as to be caught by one of the plurality of teeth formed in the fixing member 23. The jam is released.

When the pivot catching member 25 is caught by one of the plurality of teeth formed in the fixed catching member 23, the spool 10 is not rotated in the direction in which the seat belt is released, so that the seat belt is no longer loosened. do.

The friction plate 24 is formed with a guide hole 24a for guiding the pivotal catching member 25, and the pivoting member 25 has an actuating pin 25a inserted into the guide hole 24a for guiding. do. Therefore, as the clutch plate 22 is rotated, the actuation pin 25a of the swing catching member 25 is moved along the guide hole 24a of the friction plate 24, whereby the swing catching member 25 rotates. It can be caught or released by one of the plurality of teeth formed in the fixed locking member (23).

Further, after the swing catching member 25 is locked to the fixed catching member 23 in the clutch plate 22, the pivoting catching member 25 is rotated from the fixed catching member 23 when the clutch plate 22 is reversely rotated. An elastic member 27 is further provided to provide the resilient restoring force to the pivotal locking member 25 so as to be restored to the position where it is released. The elastic member 27 is preferably mounted to the coupling shaft 22b of the clutch plate 22 together with the pivotal locking member 25.

In addition, the clutch plate 22 is provided with a locking projection 22c for restricting the restoring position of the swinging locking member 25 when the swinging locking member 25 is restored by the elastic restoring force of the elastic member 27. .

The seat belt clutch inserts the actuating pin 25a of the pivotal catching member 25 into the guide hole 24a of the friction plate 24 to place the friction plate 24 over the actuating pin 25a, and then the friction plate. And a clutch cover 28 coupled to the clutch plate 22 with the clutch 24 interposed therebetween and fixed to the ring gear 21 together with the clutch plate 22.

Screw holes 22d and 28a are formed in the clutch plate 22 and the clutch cover 28, respectively, and the clutch plate 22 and the clutch cover 28 are coupled to each other through the screw 5 so that the ring gear 21 By being fixed to the clutch gear 20 is completed. The clutch gear 20 thus completed is also accommodated in the gear housing 40 like the gear train 30.

The gear housing 40 is coupled to the gear housing 30 through the screw 6 to cover the gear train 30 and the clutch gear 20 so as not to escape. Here, the screw 6 is coupled to the support bracket 1 at the same time the gear housing 40 and the gear cover 50 are coupled to the gear housing 40 is fixed to the support bracket (1). In the gear housing 40 and the gear cover 50, screw holes 48 and 52 to which the screw 6 is coupled are formed, respectively.

Through-holes 24b and 28b are formed coaxially on friction plate 24 and clutch cover 28, respectively. The through hole 28b formed in the clutch cover 28 among the through holes 24b and 28b is larger in size than the through hole 24b formed in the friction plate 24. The reason why the through hole 28b formed in the clutch cover 28 is larger than that of the through hole 24b formed in the friction plate 24 is that the pressing member 29 to be described later is used for the through hole 28b. This is to allow the friction plate 24 to be pressed through.

The shaft 60 penetrates through the through holes 24b and 28b. The shaft 60 sequentially passes through the through holes 24b and 28b to support the friction plate 24. In this embodiment, the rotating shaft 15 of the spool 10 protrudes long through the fixing member 23, and the shaft 60 is covered on the outside of the rotating shaft 15 protruding from the fixing member 23. Although illustrated in FIG. 3, if the rotation shaft 15 is formed to be short enough to be coupled to the fixed locking member 23, the shaft 60 may be formed separately from the rotation shaft 15.

The size of the through hole 24b formed in the friction plate 24 is larger than the diameter of the shaft 60, so that the friction plate 24 is movably disposed along the axial direction of the shaft 60. That is, the friction plate 24 is movable along the axial direction of the shaft 60 within a range in which the actuating pin 25a of the swing catching member 25 does not escape from the guide hole 24a.

The pressing member 29 is disposed between the friction plate 24 and the gear cover 50. The pressing member 29 is formed to a size that can pass through the through-hole 28b formed in the clutch cover 28, the friction plate 24 so that the friction plate 24 can be in close contact with the pivotal locking member 25 Pressurize.

In the gear cover 50, the support part 55 into which the shaft 60 is inserted in the inner side and the pressing member 29 is inserted in the outer side is protruded.

The friction plate 24 is pressurized by the urging member 29 to be moved along the shaft 60 between the clutch plate 22 and the clutch cover 28 so as to be in close contact with the turning member 25. That is, when the ring gear 21 is rotated, the clutch plate 22 and the clutch cover 28 are rotated together with the ring gear 21, and the friction plate 24 is pivotally disposed rotatably on the clutch plate 22. By contacting the friction member 25 in close contact with the friction member, the actuating pin 25a of the pivotal locking member 25 is moved along the guide hole 24a of the friction plate 24, whereby the pivotal locking member 25 is moved. The guide hole 24a is rotated while being guided and locked to the fixed locking member 23. Therefore, since the fixed locking member 23 cannot be rotated, the spool 10 combined with the fixed locking member 23 also cannot be rotated, so that the seat belt is not released from the spool 10. do. Of course, when the ring gear 21 is rotated in reverse, the turning pin 25a is returned to its original position by moving the operating pin 25a of the turning member 25 along the guide hole 24a. The seat belt can be released from the spool 10.

When the pivot catching member 25 returns to its original position, the elastic member 27 provides elastic restoring force to the pivoting catching member 25 so that the pivoting catching member 25 can be smoothly returned to the original position.

On the other hand, if the swinging locking member 25 is locked to the fixed locking member 23 and the rotation of the spool 10 is constrained and the friction plate 24 is rotated, the operation pin 25a of the swinging locking member 25. Since the guide hole 24a is moved along, the pivoting locking member 25 may be released from the fixed locking member 23 so that the seat belt may be released from the spool 10.

Accordingly, the anti-rotation part 24c is formed on the friction plate 24 by the pressing member 29, and the anti-rotation part 24c is locked by the pressing member 29 to rotate. It is bound.

The pressing member 29 has a body portion 29a formed in contact with the gear cover 50 on one side thereof, and a locking portion 29b engaged with the rotation preventing portion 24c while pressing the friction plate 24 on the other side thereof. Is formed.

In this embodiment, the rotation preventing portion 24c is formed as a groove into which the locking portion 29b of the pressing member 29 is inserted. Of course, the anti-rotation part 24c may be formed as a protrusion which may be inserted into the pressing member 29 and caught.

The locking portion 29b protrudes from the body portion 29a and is inserted into the groove that is the anti-rotation portion 24c while pressing the friction plate 24 to restrain the rotation of the friction plate 24.

The pressing member 29 is formed of a plastic material and is injection molded. A plurality of locking portions 29b are formed along the circumferential direction of the body portion 29a, and there is a space between the locking portions 29b, so that the locking portions 29b elastically press the friction plate 24. It becomes possible.

4 is a diagram illustrating an assembly procedure of the clutch gear 20 shown in FIG. 2.

2 and 4, the assembly sequence of the clutch gear 20 and the assembly sequence of the seat belt retractor 100 will be described. Here, the assembling order of the clutch gear 20 and the assembling order of the seat belt retractor 100 are only one embodiment, and the assembling order of some components by those skilled in the art as long as the seat belt retractor 100 is operated to be assembled. May change.

First, the spool 10 is rotatably disposed on the support bracket 1 so that the rotation shaft 15 of the spool 10 protrudes outward of the support bracket 1. Thereafter, the gear housing 40 is disposed on the support bracket 1 so that the rotation shaft 15 of the spool 10 protruding outward of the support bracket 1 penetrates.

Thereafter, the clutch plate 22 is inserted into the ring gear 21 to be fixed so as not to rotate.

Thereafter, the elastic member 27 and the swing catching member 25 are mounted on the coupling shaft 22b of the clutch plate 22.

Thereafter, while the ring gear 21 is accommodated in the gear housing 40, the rotation shaft 15 of the spool 10 passes through the through hole 22a of the clutch plate 22 and the through hole of the clutch plate 22. After allowing the rotating shaft 15 of the spool 10 penetrating the 22a to pass through the washer 26, the rotating shaft 15 of the spool 10 is inserted into the insertion hole 23a of the fixing member 23. do.

Thereafter, the shaft 60 passes through the through hole 24b of the friction plate 24, and the shaft 60 is covered with the rotation shaft 15.

Thereafter, the friction plate 24 is disposed adjacent to the pivot catching member 25 so that the actuating pin 25a of the pivot catching member 25 is inserted into the guide hole 24a of the friction plate 24, and then the clutch cover The clutch cover 28 is inserted into the ring gear 21 to fix the through hole 28b of the 28 to the shaft 60, and the clutch cover 28 is fixed to the clutch plate through the screw 5. Combine with (22).

Thereafter, the first subgear 34 is mounted on the first subgear shaft 44 of the gear housing 40.

Subsequently, the second sub gear 36 is mounted on the second sub gear shaft 46 of the gear housing 40 so that the second sub gear 36 is connected to the first sub gear 34 and the ring gear 21. To interlock.

Thereafter, the motor 2 is disposed outside the gear housing 40 so that the rotating shaft 3 of the motor 2 penetrates the through hole 42 of the gear housing 40 and the motor 2 through the screw 4. ) Is coupled to the gear housing (40).

Thereafter, the motor gear 32 is mounted on the rotation shaft 3 of the motor 2 so that the motor gear 32 meshes with the first sub gear 34.

Then, the shaft 60 is inserted into the pressing member 29 to the outside of the support portion 55 formed in the gear cover 50, and penetrated the through hole 28b of the clutch cover 28 inside the support portion 55. The gear cover 50 is brought into contact with the gear housing 40 so that the gear cover 50 is engaged with the gear housing 40 through the screw 6, and the gear housing 40 is supported by the support bracket 1. Is assembled to complete the assembly of the seat belt retractor (100).

5 and 6 are operation diagrams of the clutch gear 20.

2, 5 and 6, the operation of the clutch gear 20 and the seat belt retractor 100 will be described as follows.

First, before the automobile accident is caused, as shown in FIG. 5, the swing catching member 25 is in a state of being released from the fixed catching member 23. Therefore, since the spool 10 coupled with the fixing member 23 is rotatable, the seat belt wound around the spool 10 can be released from the spool 10. In this state, the passenger can pull the seat belt and adjust it to his physical condition.

On the other hand, if a car accident occurs, the seat belt must be restrained so that the passenger is not pushed forward. That is, the seat belt should not be released from the spool 10. Therefore, when the motor vehicle accident occurs, the motor 2 is driven. Typically, the vehicle is provided with a plurality of sensors for detecting an accident, a control device (for example, Electronic Control Unit, Airbag Control Unit, etc.) for controlling the vehicle in accordance with the value detected by the sensor As provided, the motor 2 can be driven by the control of the controller.

When the motor 2 is driven, the gear train 30 is rotated, and thus the ring gear 21 engaged with the gear train 30 is rotated.

When the ring gear 21 is rotated, the clutch plate 22 fixed inside the ring gear 21 is rotated together with the ring gear 21. At this time, since the friction plate 24 is in close contact with the swing catching member 25, the friction plate 24 is rotated slightly slower than the clutch plate 22 by the frictional action, whereby the operating pin 25a of the swing catching member 25 is rubbed. By being moved along the guide hole 24a of the plate 24, the pivot catching member 25 is rotated and caught by the stationary catching member 23 as shown in FIG.

Therefore, the spool 10 coupled with the fixed catching member 23 can no longer be rotated, so that the seat belt wound on the spool 10 is no longer released from the spool 10, so that the seat belt is a passenger. It can be restrained so as not to be pushed forward. Of course, at this time, since the locking portion 29b of the pressing member 29 is locked to the rotation preventing portion 24c of the friction plate 24, since the friction plate 24 is not rotated, the turning member 25 is By being held in the fixed locking member 23, the seat belt is prevented from being released from the spool 10.

On the other hand, the release of the swing catching member 25 from the fixed catching member 23 is made by the reverse rotation of the motor (2). That is, when the motor 2 rotates in reverse, the actuating pin 25a of the pivot catching member 25 is moved to its original position along the guide hole 24a of the friction plate 24, whereby the pivot catching member 25 is moved. By being reversed and released again from the fixed locking member 23 as shown in FIG. 5, the spool 10 is rotatable so that the seat belt wound around the spool 10 can be released from the spool 10. .

As described above, in the seat belt clutch and the seat belt retractor according to the present invention, since the rotation of the friction plate 24 is constrained by the pressing member 29, the turning locking member 25 is fixed locking member 23. Since it is possible to maintain the locked state, the state in which the rotation of the spool 10 coupled to the fixed catching member 23 is maintained, and the seat belt restraining the passenger is not released from the spool 10. Restraint can be assured.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

1: support bracket 2: motor
10: spool 20: clutch gear
21: ring gear 22: clutch plate
22c: locking jaw 23: fixed locking member
24: friction plate 24a: guide hole
24b: through hole 24c: anti-rotation part
25: swing locking member 25a: operating pin
27: elastic member 28: clutch cover
29: pressure member 29a: body portion
29b: latching portion 30: gear train
32: motor gear 34: first sub-gear
36: second subgear 40: gear housing
50: gear cover 55: support
60: shaft 100: seat belt retractor

Claims (20)

A clutch plate rotatable with respect to the spool through which the spool through which the seat belt is wound or unwound passes;
A friction plate disposed to face the clutch plate;
A fixed engaging member coupled to the spool between the clutch plate and the friction plate to rotate together with the spool;
A pivot locking member rotatably disposed on the clutch plate between the clutch plate and the friction plate, and rotated while being guided by the friction plate as the clutch plate is rotated, thereby engaging or releasing the fixed locking member; And
And a pressurizing member configured to press the friction plate such that the friction plate is in close contact with the pivot locking member so that the pivot locking member is rotated while being guided by the friction plate.
Seat belt clutch is formed with a rotation preventing portion is caught by the pressing member so that the friction plate is locked by the pressing member to restrain the rotation. The method according to claim 1,
The anti-rotation part is a seat belt clutch formed with a groove into which the pressing member is inserted. The method according to claim 1,
A guide hole is formed in the friction plate,
Seat belt clutch is formed in the pivoting member is formed with a driving pin is inserted into the guide hole guide. The method according to claim 1,
And an elastic member disposed on the clutch plate, the elastic member providing elastic restoring force to the pivot locking member so that the pivot locking member is restored to a position from which the pivot locking member is released. The method of claim 4,
The clutch belt has a seating projection protruding from the clutch plate to limit the restoring position of the swinging member when the swinging member is restored by the elastic restoring force of the elastic member. The method according to claim 1,
And a clutch cover coupled to the clutch plate with the friction plate therebetween. A gear train connected to a motor and rotated by a driving force of the motor;
A ring gear engaged with the gear train; And
A seat belt clutch disposed in the ring gear;
The seat belt clutch,
A clutch plate fixed to the ring gear and rotatable with respect to the spool through a spool through which a seat belt is wound or unwound;
A friction plate disposed to face the clutch plate;
A fixed engaging member coupled to the spool between the clutch plate and the friction plate to rotate together with the spool;
A pivot locking member rotatably disposed on the clutch plate between the clutch plate and the friction plate, and rotated while being guided by the friction plate as the clutch plate is rotated, thereby engaging or releasing the fixed locking member;
And a pressurizing member configured to press the friction plate so that the friction plate is in close contact with the pivot locking member so that the pivot locking member can rotate while being guided by the friction plate.
And the anti-rotation part is formed on the friction plate so that the friction plate is locked by the pressing member and the rotation is constrained. The method of claim 7,
The anti-rotation seat belt retractor is formed as a groove into which the pressing member is inserted. The method of claim 7,
A gear housing through which the spool penetrates and accommodates the gear train and the ring gear;
And a gear cover coupled to the gear housing and covering the gear train and the ring gear accommodated in the gear housing. The method according to claim 9,
The pressing member is disposed between the friction plate and the gear cover, the seat belt contact with the gear cover is formed on one side, the other side seat belt belt is formed with a locking portion engaging the anti-rotation portion while pressing the friction plate Tractor. The method according to claim 9,
The anti-rotation part is formed as a groove into which the pressing member is inserted,
The pressing member is disposed between the friction plate and the gear cover, the body portion in contact with the gear cover on one side is formed, the other side protruding from the body portion is formed engaging portion is inserted into the groove while pressing the friction plate Seat belt retractor. The method according to claim 10 or 11,
The seat belt retractor is formed with a plurality of the engaging portion in the circumferential direction of the body portion so that the engaging portion to elastically press the friction plate. The method of claim 7,
A guide hole is formed in the friction plate,
The seat belt retractor is formed in the pivoting member is formed with a driving pin is inserted into the guide hole to guide. The method of claim 7,
And a resilient member disposed on the clutch plate to provide an elastic restoring force to the pivot locking member so that the pivot locking member is restored to a position where the pivot locking member is released from the fixed locking member. The method according to claim 14,
And the clutch plate has a seating jaw protruding from the clutch plate to limit a restoring position of the pivoting member when the pivoting member is restored by the elastic restoring force of the elastic member. The method according to claim 9,
And a clutch cover coupled to the clutch plate with the friction plate interposed therebetween and fixed to the ring gear. 18. The method of claim 16,
Through-holes are formed in the friction plate,
And a shaft for supporting the friction plate through the through hole. 18. The method of claim 17,
And the friction plate is movably disposed along the axial direction of the shaft. 19. The method of claim 18,
The seat belt retractor is formed in the gear cover, the support is inserted into the shaft and the pressing member is inserted in the outside. The method of claim 7,
The gear train,
A motor gear coupled to the rotating shaft of the motor,
A first sub gear meshed with the motor gear and rotated in an opposite direction;
And a second subgear meshed with the first subgear to rotate in the opposite direction and engaged with the ring gear.

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