CN211335892U

CN211335892U - Seat belt retractor with force reducing device

Info

Publication number: CN211335892U
Application number: CN201922128443.XU
Authority: CN
Inventors: 蒋韶松; 张丽
Original assignee: Dongchen Vehicle Parts Co ltd
Current assignee: Dongchen Vehicle Parts Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-08-25
Anticipated expiration: 2029-12-02

Abstract

The utility model relates to a safety belt coiler technical field, concretely relates to safety belt coiler with subtract power device has: a spool that winds a webbing belt that restrains an occupant; the base frame supports the reel to keep the reel to rotate flexibly; the coiling spring is connected on the reel and keeps the coiling force of the reel on the braid; still have a coil direction and the opposite comfortable spring of rolling spring, be equipped with a ratchet on the spool, the inner of comfortable spring is pawl form and ratchet cooperation, the outside cover of comfortable spring is equipped with vice spring lid, vice spring lid inner wall is equipped with a curved slip reed, the outer end and the slip reed of comfortable spring are connected, the outer peripheral face of vice spring lid is ratchet form, the outside cover of vice spring lid is equipped with the housing, be equipped with a restriction vice spring lid pivoted pawl in the housing, be equipped with a control pawl on the housing and block or break away from the group board mechanism of vice spring lid, under the prerequisite that does not influence the retractor normal function, the sense of straining of meshbelt to the human body has been alleviateed, decompression effect has, the travelling comfort that improves the safety belt and use.

Description

Seat belt retractor with force reducing device

Technical Field

The utility model relates to a safety belt coiler technical field, concretely relates to safety belt coiler with subtract power device.

Background

An automobile safety device is a safety device for restraining a passenger in a collision, and for preventing the passenger from colliding with a steering wheel, an instrument panel, or the like for a second time in the collision, or from being rushed out of the vehicle to cause a death and injury in the collision. The seatbelt apparatus generally includes: the seat belt retractor includes a webbing for restraining a passenger, a belt retractor for winding the webbing, a guide holder provided on a vehicle body side and guiding the webbing, a belt holder for fixing the webbing to the vehicle body side, a buckle disposed on a side surface of the seat, and a tongue disposed on the webbing, and the passenger is restrained to the seat by the webbing by the belt retractor by inserting the tongue into the buckle. The retractor functions to store webbing and lock webbing pull-out, which is the most complex mechanical part of the belt. The coiler the inside is a ratchet, the passenger can freely at the uniform velocity pulling meshbelt on the seat under the normal condition, but in case stop or when the vehicle meets emergency state from the coiler continuous pull-out process as the meshbelt, ratchet will do the locking action and die the automatic locking of meshbelt, prevent the meshbelt to pull out, be equipped with the roll-up subassembly on the coiler, the effect of roll-up subassembly lies in guaranteeing that the safety meshbelt is effectual to withdraw, make the effect that has on the safety meshbelt simultaneously, the constraint effect of performance safety belt, therefore, the power that the roll-up subassembly acted on the safety meshbelt still can produce the pressure to passenger's health, in use, there is certain uncomfortable sense.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned defect, provide the safety belt coiler that has the power reduction device, under the prerequisite that does not influence the coiler normal function, alleviateed the meshbelt to the pressure of tightening of human body and felt, have the decompression effect, improve the travelling comfort that the safety belt used.

The utility model provides a technical scheme that its technical problem adopted as follows:

a seatbelt retractor having a force reducing device includes: a spool that winds a webbing belt that restrains an occupant; the base frame supports the reel to keep the reel to rotate flexibly; the coiling spring is connected on the reel and keeps the coiling force of the reel on the braid; the outer peripheral surface of the auxiliary spring cover is in a ratchet shape, the outer part of the auxiliary spring cover is covered with a cover shell, a pawl for limiting the rotation of the auxiliary spring cover is arranged in the cover shell, the pawl is movably connected with the cover shell, the cover shell is provided with a plate shifting mechanism for controlling the pawl to clamp or separate from the auxiliary spring cover, the plate shifting mechanism comprises a driving gear connected to the reel and a shifting plate capable of swinging on the side edge of the driving gear, the shifting plate is movably connected with the cover shell, one end of the shifting plate far away from the driving gear is movably connected with the pawl, the shifting plate swings to drive the pawl to be close to or far away from the auxiliary spring cover, the shifting plate is provided with two shifting gears respectively distributed on two sides of the driving gear, two stirring gears are distributed in the swinging direction of the stirring plate, an active ejecting block is arranged on the driving gear, passive ejecting blocks are arranged on the two stirring gears, the two stirring gears cannot be meshed with the driving gear simultaneously, in the meshing process of the driving gear and the single-side stirring gear, the active ejecting block can eject the passive ejecting block to push the stirring gear to be disengaged from the driving gear, the stirring plate is pushed to swing towards the other side, the driving gear is meshed with the other-side stirring gear, and the side stirring gear is pushed to be disengaged from the driving gear until the active ejecting block is contacted with the passive ejecting block.

Furthermore, the winding spring is arranged on the outer side of the base frame, the comfortable spring is arranged on the outer side of the winding spring, a winding cover is arranged on the outer portion of the winding spring and connected with the base frame, a winding wheel is arranged on the reel corresponding to the winding spring, the inner end of the winding spring is connected with the winding wheel, the outer end of the winding spring is connected with the winding cover, and the winding cover is arranged inside the housing.

Furthermore, the inner cavity of the auxiliary spring cover is circular, the sliding spring leaf is in a pressed state, and the sliding spring leaf is attached to the wall of the inner cavity of the auxiliary spring cover.

Furthermore, a pawl column is arranged on the housing corresponding to the pawl, the pawl is sleeved on the pawl column, an arc-shaped groove is formed in one end, far away from the driving gear, of the shifting plate, and a sliding column which is embedded into the arc-shaped groove and is in sliding fit with the arc-shaped groove is arranged on the pawl.

Furthermore, the housing including hold the spring chamber of receiving spring, comfortable spring, hold the group board chamber of dialling the trigger mechanism, the spring chamber, dial and pass through the baffle interval between the board chamber, correspond on the baffle and dial the board department and be equipped with the cooperation and dial the wobbling swing groove of board, dial the setting of board activity in the swing groove, the baffle center department is equipped with the through-hole that the spool of being convenient for passed.

Further, the elasticity of the comfort spring is smaller than that of the coil-winding spring.

Furthermore, a pawl cavity which is convex and used for accommodating the pawl is arranged at the position of the cover shell corresponding to the pawl.

Furthermore, the poking plate cavity is provided with a detachable end cover.

The utility model has the advantages that: adopt above-mentioned scheme, make the safety belt coiler have meshbelt decompression function through simple structure in inherent function, travelling comfort when having improved the safety belt and using to, the flexible, controllable, reliable of controlling of decompression function has very big convenience, and the simple structure of this coiler is convenient for make, has low-cost advantage, the utility model discloses increase mechanical structure inside the coiler and realize reducing the power function, do not increase electrical components and make things convenient for the supporting use of vehicle, need not to change automobile body pencil.

Drawings

The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of an explosion structure of a real-time method according to the present invention.

Fig. 2 is the utility model relates to an explosion structure schematic diagram of rolling wheel, ratchet department in the real-time mode.

Fig. 3 is a schematic structural diagram of a plate shifting mechanism in a real-time manner according to the present invention.

Fig. 4 is a schematic structural diagram of the auxiliary spring cover in a real-time manner according to the present invention.

Fig. 5 is a schematic structural diagram of a housing in a real-time manner according to the present invention.

Fig. 6 is a schematic cross-sectional structure diagram of the housing in a real-time manner according to the present invention.

Wherein: the device comprises a reel 1, a base frame 2, a winding spring 3, a winding wheel 31, a winding cover 32, a comfort spring 4, a ratchet wheel 41, an auxiliary spring cover 42, a sliding reed 5, a housing 6, an end cover 61, a partition plate 62, a swing groove 63, an end cover 61, a shifting plate 7, a pawl 8, a driving gear 9, a driving ejector block 91, a shifting gear 10 and a driven ejector block 101.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example 1: referring to fig. 1, a seatbelt retractor having a force reducing device includes: the safety belt winding device comprises a winding shaft 1, the winding shaft 1 is used for winding a mesh belt for limiting passengers, a base frame 2, the base frame 2 is used for supporting the winding shaft 1 to keep the winding shaft 1 to rotate flexibly, the winding shaft 1 is in rotatable fit with the base frame 2, a winding spring 3 is arranged on the outer side of one end of the base frame 2, correspondingly, the end part of the side of the winding shaft 1 extends out of the base frame 2, a winding wheel 31 is sleeved on the outer side of the end of the winding shaft 2, the winding wheel 31 is connected with the end part of the winding shaft through a spline, the outer peripheral surface of the winding wheel 31 is provided with a plurality of uniformly distributed connecting clamping grooves, the winding spring 3 is sleeved outside the winding wheel 31, the inner end of the winding spring 3 is clamped into the connecting clamping groove to be connected with the winding wheel 31, the outer end of the winding spring 3 is connected to a winding cover 32 which is covered and fixed on the outer side of the winding, the winding cover 32 is arranged to protect the winding spring, avoid external foreign matter interference and ensure the winding function, the end part of the winding wheel 31 far away from the base frame 2 is provided with a first convex connecting column, and the axis of the hollow connecting column is consistent with the axis of the scroll.

A comfort spring 4 is arranged on the outer side of the coil winding spring 3, the winding direction of the comfort spring 4 is opposite to that of the coil winding spring 3, in addition, the elasticity of the comfort spring 4 is smaller than that of the coil winding spring 3, referring to fig. 2, a ratchet wheel 41 is connected on the outer side of a winding wheel 31, the ratchet wheel 41 is connected on a hollow connecting column of the winding wheel, one end of the ratchet wheel 41 close to a base frame is in matched connection with a first connecting column of the winding wheel, the end of the ratchet wheel is connected with the first connecting column through a spline structure to realize the synchronous rotation of the ratchet wheel and the winding wheel, the other end of the ratchet wheel 41 far away from the base frame is provided with a convex second connecting column which is coaxial with the ratchet wheel, the comfort spring is sleeved on the outer part of the ratchet wheel, the inner end of the comfort spring 4 is bent towards the center to form a pawl structure, the pawl structure can be matched with the ratchet wheel to form unidirectional locking, an auxiliary spring cover, the sliding reed 5 is in a compression state, the sliding reed 5 is attached to the inner wall of the inner cavity and can slide, the outer end of the comfortable spring 4 is connected with the sliding reed 5, the outer peripheral surface of the auxiliary spring cover 4 is in a ratchet shape, a housing 6 is covered outside the auxiliary spring cover 4, a movable pawl 8 which can be matched with the ratchet-shaped outer peripheral surface of the auxiliary spring cover 4 and can limit rotation of the auxiliary spring cover is arranged at the outer side of the auxiliary spring cover 4 in the housing, a groove is formed in the pawl 8, a pawl column is arranged at the corresponding position of the housing 6 and is embedded into the groove, the pawl has swinging property and can move close to or far away from the auxiliary spring cover, the pawl 8 is meshed with the ratchet-shaped outer peripheral surface of the auxiliary spring cover 4, the auxiliary spring cover is locked and cannot rotate, the pawl is separated from the outer peripheral surface of the auxiliary spring cover, and the auxiliary spring cover.

Referring to fig. 4, when the pawl is in a state of locking the auxiliary spring cover, i.e. the auxiliary spring cover is fixed, and the safety belt is pulled outwards, the reel rotates, the winding wheel drives the inner end of the winding spring to rotate, wind and accumulate force, the ratchet wheel pulls the comfort spring to wind and accumulate force, the winding spring winds and accumulates force, the winding force is generated on the reel, so that the safety belt has the recovered winding force, the braid generates pressure on the body of a passenger, and the winding direction of the comfort spring is opposite to that of the winding spring, therefore, the acting force of the comfort spring acting on the reel is opposite to that of the winding spring, and further the winding force of the winding spring is counteracted, so that the pressure of the safety belt on the passenger is reduced, the pressure feeling of the safety belt on the body of the passenger is reduced, and the comfort spring has the pressure reducing effect, the retractor has the pressure reducing effect, improves the use comfort of the safety belt device, the adopted comfort, the safety belt is guaranteed to be retractable, the normal use function of the retractor is not influenced, the inherent safety guarantee function of the safety belt device is guaranteed, the comfortable spring only plays a role in reducing tightening pressure, the outer end of the winding spring is fixed on the winding spring cover, the winding spring cover is fixed, and the winding spring can effectively store force.

The outer end of the comfortable spring is connected with the sliding reed, the sliding reed is pressed and attached to the inner wall of the inner cavity of the auxiliary spring cover and has radial pressure, the sliding reed is in the range of the self-elasticity of the sliding reed and is fixed at the position of the inner wall of the inner cavity, therefore, the sliding reed has a limiting effect on the outer end of the comfortable spring, under the condition that the auxiliary spring cover is fixed, the outer end of the comfortable spring is fixed and is effectively wound to generate the pressure reduction of the comfortable spring in the range of the elasticity of the sliding reed, the pressure reduction effect is realized, the safety belt retracts, the spring is wound, the ratchet wheel has a one-way locking and pulling effect on the comfortable spring and does not act reversely, therefore, the comfortable spring can keep the self state, the comfortable spring continuously stores force in the continuous external pulling process of the safety belt, and when the acting force on the comfortable spring is greater than the elasticity of the sliding, the sliding reed elasticity is overcome to effort on comfortable spring promptly, the positioning action of sliding reed is inefficacy, the outer end of comfortable spring drives the sliding reed and slides in vice spring housing inner chamber, at this moment, comfortable spring loses the decompression effect, effectively guarantee the safety action of safety belt, therefore, the effort of comfortable spring has the intervallity, it is corresponding, on the outer length of drawing of safety belt, there is a comfortable length scope of human body, in this comfortable length scope of human body, comfortable spring offsets partial effort of receiving the wind spring, the pressure reducing function has, reduce the pressure of tightening of safety belt to passenger's health, improve the travelling comfort, through simple structure, make the extremely strong adjustability of this coiler use, the flexibility.

In order to control and adjust the position of the comfortable length range of the human body on the safety woven belt, the utility model provides a plate-shifting mechanism capable of controlling the pawl state, the plate-shifting mechanism controls the pawl to be in a locking or unlocking state, the specific plate-shifting mechanism is arranged at the housing, referring to figure 3, the plate-shifting mechanism is arranged at the outer side of the ratchet wheel 41, the plate-shifting mechanism comprises a driving gear 9, a shifting plate 7 with the side edge of the driving gear 9 capable of swinging, the shifting plate 7 is movably connected with the housing 6, one end of the driving gear 9 close to the base frame is connected with a second connecting column of the ratchet wheel through a spline structure, the driving gear rotates synchronously and coaxially with the ratchet wheel, one end of the shifting plate 7 far away from the driving gear 9 is movably connected with the pawl 8, specifically, one end of the driving gear 9 far away from the shifting plate 7 is provided with an arc-shaped groove, the shifting plate 7 swings, the arc-shaped groove 71 pushes the sliding column to enable the pawl 8 to move close to or far away from the outer peripheral surface of the auxiliary spring cover 4, one side of the shifting plate 7 close to the driving gear 9 is provided with two shifting gears 10 which are respectively distributed on two sides of the driving gear 9, the two shifting gears 10 can freely rotate on the shifting plate, the two shifting gears 10 are distributed in the swinging direction of the shifting plate 7, the driving gear 9 is provided with an active top block 91, the active top block 91 is arranged on the outer end surface of the driving gear 9 far away from the base frame, the active ground block 91 does not influence the meshing performance of the driving gear, the two shifting gears 10 are respectively provided with a passive top block 101, the passive top block 101 is arranged on the outer end surface of the shifting gear 10 far away from the base frame, the passive top block 101 does not influence the meshing performance of the shifting gears 10, the total length of the active top block 91 and the passive top block 101 after, the separation of the driving gear and the toggle gear is realized, two toggle gears 10 can not be meshed with the driving gear 9 at the same time, the driving gear 9 can only be meshed with a single toggle gear 10 and is separated from another toggle gear 10, in the meshing process of the driving gear 9 and the single-side toggle gear 10, the driving gear 9 rotates to drive the toggle gear 10 to rotate, in a certain set position, the driving ejector block 91 and the driven ejector block 101 can be contacted, the driving gear is fixed in position, the driving ejector block can eject the driven ejector block to enable the toggle gear to move towards the direction far away from the driving ejector block, the toggle gear is separated from the driving gear, meanwhile, the side gear which is separated from meshing drives the toggle plate to swing towards the other side, then, the driving gear 9 is meshed with the toggle gear 10 at the other side to drive the toggle gear at the side to rotate, when the side rotates to the set position, the driving top block of the driving gear can contact with the driven top block of the shifting gear at the side, the shifting gear at the side is pushed to be disengaged with the driving gear, so that the shifting plate swings to the other side, and the left-right swing of the shifting plate is controlled through the transmission between the driving gear and the shifting gear and the contact pushing between the driving top block and the driven top block, thereby realizing the state control of the pawl, the position of the driven top block on the shifting gear is different relative to the position of the driving top block on the driving gear, so that the driving gear has specific rotating circles to push the shifting gear to be disengaged, the shifting plate mechanism not only can be used for controlling the pawl, but also can be used in places needing state change, the rotating angles of the shifting gear and the shifting gear are adjusted, the pushing positions of the driving top block and the driven top block are adjusted, the driving gear and a scroll synchronously rotate, and the setting position of the driven top block corresponds to a certain tooth of the shifting gear, the setting position of the driving ejector block corresponds to a certain tooth of the driving gear, the driving gear is fixed in position, and the contact time of the driving ejector block and the driven ejector block can be obtained through calculation.

In the embodiment, the driving gear is taken as a reference, the clockwise direction is the right side, the anticlockwise direction is the left side, when the left side toggle gear is meshed with the driving gear, the pawl is in a state of locking the auxiliary spring cover, in a locked state, the comfortable spring has a comfortable effect, the tightening pressure of a safety belt to a human body is reduced, the left side toggle gear is pushed away along with the rotation of the left side toggle gear following the driving gear to reach a set position, the toggle plate swings clockwise, then the right side toggle gear is meshed with the driving gear, meanwhile, the toggle plate drives the pawl to be away from the auxiliary spring cover, the auxiliary spring cover is unlocked, the pawl is in an unlocked state of the auxiliary spring cover, the auxiliary spring cover can rotate, then the spring pressure reduction function is lost comfortably, in the continuous rotation of the driving gear, the left side toggle gear is meshed with the toggle gears at different positions and is separated in a jacking mode, then the, the use of the pressure reduction function of the comfortable spring is controlled through the simple plate shifting mechanism, the flexible, adjustable and controllable human body comfortable length range on the safety woven belt is realized, the use performance is improved, and the use effect is strong.

The driving gear continues to rotate, the right side toggle gear is pushed away at a set position, the toggle plate swings anticlockwise, the pawl is close to the outer peripheral face of the auxiliary spring cover to lock the auxiliary spring cover, so that the comfort spring has a decompression function again, meanwhile, the left side toggle gear is meshed with the driving gear again, the driving gear continues to rotate, the left side toggle gear is pushed away at the set position again, the toggle plate swings clockwise, the pawl unlocks again, the circulation is carried out, on a sufficiently long mesh belt, intermittent regular distribution of a human body comfort length range on the mesh belt can be realized, the use range is enlarged, the locking or unlocking state of the auxiliary spring cover is flexible and controllable, the pressure on the mesh belt is decompressed, on the premise of not influencing the effect of the safety belt is realized, the pressure on a human body is reduced, the use comfort is improved, the structure is simple and ingenious, the reliability is high, the manufacturing is convenient, the utility model discloses, the electric appliance elements are not added, so that the vehicle can be conveniently matched for use, and the wiring harness of the vehicle body does not need to be changed.

The spring coiling, the comfortable spring and the plate shifting mechanism are sequentially arranged at one end of the outer side of the base frame, the volume of the retractor is favorably reduced, the use performance of the retractor is improved, the housing 6 is connected to the base frame, referring to fig. 6, the housing 6 comprises a spring coiling cavity for accommodating the spring coiling 3 and the comfortable spring 4 and a plate shifting cavity for accommodating the plate shifting mechanism, the spring coiling cavity and the plate shifting cavity are separated by a partition plate 62, a swing groove 63 matched with the plate shifting swing is arranged at the position, corresponding to the plate shifting, of the partition plate 62, the plate shifting 7 is movably arranged in the swing groove 63, a through hole convenient for a second connecting column to pass through is arranged at the center of the partition plate 62, the transmission between the driving gear and the ratchet wheel is convenient, the spring coiling cavity and the plate shifting cavity are mutually independent, the spring coiling and the comfortable spring are effectively ensured not to be interfered by foreign objects, the assembly operation is convenient, particularly the assembly of the, the pawl is convenient to assemble, the detachable end cover 61 is arranged in the plate shifting cavity, and the plate shifting mechanism is convenient to assemble.

Referring to fig. 5, an annular groove is formed in one end surface, facing the auxiliary spring cover, of the partition plate 62, a plurality of protrusions are formed in one end surface, facing the partition plate, of the auxiliary spring cover, the protrusions are embedded into the annular groove to guide rotation of the auxiliary spring cover, assembling accuracy between the housing and the auxiliary spring cover is improved, and rapid positioning and assembling are facilitated.

Example 2: the difference between this embodiment and embodiment 1 is that, in this embodiment, the outer end of the reel extends to the driving gear, the end of the reel is matched with the driving gear key and can rotate synchronously, and the winding wheel and the ratchet wheel are sleeved on the reel and rotate synchronously with the reel.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the techniques of the present invention are substantially any simple modification and equivalent changes to the above embodiments, all falling within the protection scope of the present invention.

Claims

1. A seatbelt retractor having a force reducing device includes:

a spool that winds a webbing belt that restrains an occupant;

the base frame supports the reel to keep the reel to rotate flexibly;

the coiling spring is connected on the reel and keeps the coiling force of the reel on the braid;

it is characterized in that the preparation method is characterized in that,

the outer peripheral surface of the auxiliary spring cover is ratchet-shaped, the outer part of the auxiliary spring cover is covered with a cover shell,

a pawl for limiting the rotation of the auxiliary spring cover is arranged in the housing, the pawl is movably connected with the housing, the housing is provided with a plate shifting mechanism for controlling the pawl to clamp or separate from the auxiliary spring cover, the plate shifting mechanism comprises a driving gear connected on the scroll and a shifting plate with the side edge of the driving gear capable of swinging, the shifting plate is movably connected with the housing, one end of the shifting plate far away from the driving gear is movably connected with the pawl, the shifting plate swings to drive the pawl to be close to or far away from the auxiliary spring cover, the shifting plate is provided with two shifting gears which are respectively distributed at two sides of the driving gear, the two shifting gears are distributed in the swinging direction of the shifting plate, the driving gear is provided with an active top block, the two shifting gears are provided with passive top blocks, the two shifting gears cannot be simultaneously engaged with the driving gear, in the process of the driving gear and the single-side shifting gears, the driving gear and the shifting gear on the other side are meshed until the driving ejector block is contacted with the driven ejector block to push the shifting gear on the side to be disengaged from the driving gear.

2. The seatbelt retractor according to claim 1, wherein the wind-up spring is disposed outside the base frame, the comfort spring is disposed outside the wind-up spring, a wind-up cover is disposed outside the wind-up spring, the wind-up cover is connected to the base frame, a wind-up pulley is disposed on the spool corresponding to the wind-up spring, an inner end of the wind-up spring is connected to the wind-up pulley, an outer end of the wind-up spring is connected to the wind-up cover, and the wind-up cover is disposed inside the housing.

3. The seatbelt retractor according to claim 1, wherein the sub spring cover has a circular inner cavity, the sliding spring is in a compressed state, and the sliding spring is attached to the inner cavity wall of the sub spring cover.

4. The seatbelt retractor according to claim 1, wherein the housing has a pawl post corresponding to the pawl, the pawl is disposed on the pawl post, an arc slot is disposed at an end of the driving gear away from the dial plate, and a sliding post embedded in the arc slot and slidably engaged with the arc slot is disposed on the pawl.

5. The safety belt retractor with the force reducing device as claimed in claim 1, wherein the housing comprises a coil spring cavity for accommodating the coil spring and the comfort spring, and a shifting plate cavity for accommodating the shifting plate mechanism, the coil spring cavity and the shifting plate cavity are separated by a partition plate, a swing groove matched with the shifting plate to swing is arranged on the partition plate corresponding to the shifting plate, the shifting plate is movably arranged in the swing groove, and a through hole for allowing the reel to pass through is arranged at the center of the partition plate.

6. The seatbelt retractor having a force reducing device as claimed in claim 1, wherein the comfort spring has a spring force smaller than that of the take-up spring.

7. The seatbelt retractor according to claim 1, wherein the housing is provided with a pawl chamber for receiving the pawl at a position corresponding to the pawl.

8. The seatbelt retractor having a force reducing mechanism according to claim 5 wherein the toggle plate chamber is provided with a removable end cap.