CN208715144U - A kind of preload limiter safety belt and its pre-tighten limiter anti-attenuation mechanism - Google Patents

Abstract

The utility model discloses a kind of preload limiter anti-attenuation mechanism for pre-tightening limiter safety belt, including mounting disc, the ratchet being rotationally arranged in the mounting disc, the pre- bearing up pulley for being rotationally arranged in the mounting disc and linking into an integrated entity with the bottom end of the ratchet, and it is connected to the circumferential direction of the mounting disc, the instantaneous transmission mechanism for being transferred a driving force to when needing to tighten safety belt on the pre- bearing up pulley, and the ratchet is connected with the spool for furling safety belt.So, since pre- bearing up pulley links into an integrated entity with ratchet, while instantaneous transmission mechanism transfers a driving force to pre- bearing up pulley, pre- bearing up pulley is able to drive ratchet synchronous rotary, and ratchet keeps connecting with spool, therefore is further driven to spool synchronous rotary, to quickly furl safety belt, safety belt is tensed rapidly, passenger is tightened on the seat.A kind of preload limiter safety belt is also disclosed in the utility model, and its advantages are as described above.

Description

A kind of preload limiter safety belt and its pre-tighten limiter anti-attenuation mechanism

Technical field

The utility model relates to technical field of automobile accessories, in particular to a kind of preload limiter for pre-tightening limiter safety belt is anti- Damping mechanism.The utility model further relates to a kind of preload limiter safety belt including above-mentioned preload limiter anti-attenuation mechanism.

Background technique

With the development of the automobile industry, more and more automobile parts have been used widely.

By taking car belt as an example, car belt and is avoided collision to constrain in collision occupant When occupant and steering wheel and instrument board etc. secondary collision occurs, or while avoiding collision, goes out outside vehicle the safety device for leading to the casualties. Car belt can be referred to as seat harness again, be one kind of passenger restraint system.Car belt is generally acknowledged most honest and clean Valence is also most effective safety device.

Common safety belt includes conventional three-point safety belt, ELR three-point safety belt and ALR three-point safety belt etc., The structure of such safety belt mainly includes ribbon, coiler and fixed mechanism, such as buckle, lock tongue, fixed pin and fixing seat, band Button and lock tongue are the devices for fastening and unlocking seat harness.

Currently, many middle and high ends car is fitted with the safety belt with pretensioner and force-limiting device.Pretensioner be for The extra tensioning surplus for eliminating safety belt as far as possible, the air bag injury head for avoiding occupant from being exploded.Force-limiting device is in stress After the peak value past, the tensioning dynamics of safety belt is reduced, to reduce occupant's rib cage and shoulder stress.

In the prior art, the nuclear structure for pre-tightening limiter safety belt is gear ring and spool gears, spool gears generally with Gear ring eccentric setting, under normal circumstances, spool gears voluntarily rotate, and gear ring is motionless, and the two is independent of each other, and move without interference. And when needing to tighten safety belt, the driving force (the sharp increase air pressure that such as chemical substance explosion generates) generated by moment pushes Gear ring compresses spool gears, and drives spool gears to be rotated by force, and safety belt is quickly tightened.

However, in the prior art in the way of gear ring drive spool gears rotation, although also can quickly tighten safety belt, It is displaced after certain distance however, there remains gear ring and is engaged again with spool gears formation, it later could be successfully by the driving of outburst Power is transferred in spool gears, during which there is the cycle in time of determined power transmitting, at the time of for seizing every minute and second, this section of cycle in time Caused influence is extremely important, drastically influences the safety problem of passengers inside the car.In addition, the inside of the storage cabinet of safety belt Narrow space, gear ring in the prior art and spool gears are separately positioned on mounting surface, need to occupy larger space.

Therefore, the preload efficiency for pre-tightening limiter safety belt how is improved, reduces and the space of storage housing interior volume is accounted for With being those skilled in the art's technical problem urgently to be resolved.

Utility model content

The purpose of the utility model is to provide a kind of preload limiter anti-attenuation mechanisms for pre-tightening limiter safety belt, can be improved The preload efficiency of limiter safety belt is pre-tightened, the space hold to storage housing interior volume is reduced.Another mesh of the utility model Be to provide a kind of preload limiter safety belt including above-mentioned preload limiter anti-attenuation mechanism.

In order to solve the above technical problems, the utility model provides a kind of preload limiter anti-attenuation machine for pre-tightening limiter safety belt Structure, including mounting disc, the ratchet being rotationally arranged in the mounting disc, be rotationally arranged in the mounting disc and with The pre- bearing up pulley that the bottom end of the ratchet links into an integrated entity, and be connected to, with the circumferential of the mounting disc for needing to tighten peace The instantaneous transmission mechanism on the pre- bearing up pulley, and the ratchet and the volume for furling safety belt are transferred a driving force to when full band Axis is connected.

Preferably, the instantaneous transmission mechanism includes that the conduit being connected in the mounting disc circumferential direction, order are accommodated in institute Several driving balls in conduit are stated, and are installed on the catheter tip, for generating driving force, by triggering moment to push away Move each trigger assembly for driving ball successively to be struck in the circumferential direction of the pre- bearing up pulley along preset direction.

Preferably, several are uniformly provided in the circumferential side wall of the pre- bearing up pulley for matching with each driving ball The appearance ball groove of conjunction.

Preferably, the trigger assembly generates air pressure motive force particularly for by chemical explosion in the conduit The blasting charge.

Preferably, each driving ball is specially steel ball.

Preferably, it is provided with guidance ball at the head end position of the conduit, and is inserted on the guidance ball for shearing The positioning pin of fracture, the top of the positioning pin are connected on the top bottom surface of the mounting disc, and the bottom end of the positioning pin connects It connects in the bottom surface of the mounting disc.

Preferably, it is additionally provided in the mounting disc rotatably, for the pre- bearing up pulley described in each driving ball impact The secondary pawl for blocking the ratchet afterwards to prevent it from inverting.

Preferably, the secondary pawl include the rotary disk being rotationally arranged in the mounting disc, be connected to it is described The snap-arms of ratchet in the circumferential direction of rotary disk and for blocking the ratchet, and be connected in the circumferential direction of the rotary disk simultaneously For being abutted against with the positioning pin, the registration arm in its natural state remaining stationary the rotary disk.

Preferably, the secondary pawl further includes the reset arm being connected in the circumferential direction of the rotary disk, and the reset Limit spring is connected on the rear end face of arm, the other end of the limit spring is connected on the inner wall of the mounting disc, is used for When the snap-arms block the ratchet of the ratchet, the reset arm is tensed to prevent the rotary disk counter-rotating.

The utility model also provides a kind of preload limiter safety belt, and main includes with body, storage cabinet and being set to described The intracorporal preload limiter anti-attenuation mechanism of containing box, wherein preload limiter anti-attenuation mechanism is specially any of the above-described institute The preload limiter anti-attenuation mechanism stated.

It is provided by the utility model pre-tighten limiter safety belt preload limiter anti-attenuation mechanism, mainly include mounting disc, Ratchet, pre- bearing up pulley and instantaneous transmission mechanism.Wherein, structure based on mounting disc, is typically mounted on body, is mainly used for installing With remaining components of carrying.Ratchet and pre- bearing up pulley are installed in mounting disc, and both rotatable.Ratchet and spool phase Even, spool synchronous rotary can be driven, which is able to drive safety belt when rotated and carries out scrolling, to quickly tighten or loosen Safety belt.The bottom end (or top) of pre- bearing up pulley and ratchet links into an integrated entity, and is mainly used for matching rotation with instantaneous transmission mechanism, And instantaneous transmission mechanism is connected to the circumferential direction of mounting disc, is mainly used for judging current needs tightening safety belt rapidly in vehicle sense component When, driving force is generated immediately and the driving force of sharp increase is passed into pre- bearing up pulley.In this way, when car body such as collides at the accidents, vehicle Component detection is felt to trigger signal, and sends it to instantaneous transmission mechanism, and instantaneous transmission mechanism is immediately performed respective operations, wink Between generate the huge driving force of sharp increase, and the driving force is transferred on pre- bearing up pulley, so that pre- bearing up pulley be driven quickly to be rotated. Importantly, due to which pre- bearing up pulley links into an integrated entity with ratchet, therefore, when instantaneous transmission mechanism transfers a driving force to pre- bearing up pulley Meanwhile pre- bearing up pulley is able to drive ratchet synchronous rotary, and ratchet keeps connecting with spool, therefore it is synchronous to be further driven to spool Rotation, to quickly furl safety belt, safety belt is tensed rapidly, passenger is tightened on the seat.Compared to existing skill Ratchet and pre- bearing up pulley are designed as integral structure by art, the utility model, can be improved the preload efficiency for pre-tightening limiter safety belt, The risk of the hiding power transmitting cycle in time of split type transmission mechanism is eliminated, while reducing the space to storage housing interior volume It occupies.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to the attached drawing of offer.

Fig. 1 is a kind of overall structure diagram of specific embodiment provided by the utility model.

Fig. 2 is the partial structural diagram of Fig. 1.

Fig. 3 is the part explosive view of structure shown in Fig. 1.

Fig. 4 is the structural schematic diagram that secondary pawl shown in Fig. 3 blocks ratchet state.

Fig. 5 is that the fit structure of positioning pin and guidance ball is illustrated in a kind of specific embodiment provided by the utility model Figure.

Fig. 6 is the integral structure schematic diagram of ratchet and pre- bearing up pulley shown in Fig. 3.

Wherein, in Fig. 1-Fig. 6:

Mounting disc -1, ratchet -2, pre- bearing up pulley -3 hold ball groove -301, spool -4, and conduit -5 drives ball -6, draws Lead ball -7, positioning pin -8, secondary pawl -9, rotary disk -901, snap-arms -902, registration arm -903, reset arm - 904, limit spring -10.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-Fig. 6 is please referred to, Fig. 1 is a kind of overall structure signal of specific embodiment provided by the utility model Figure, Fig. 2 are the partial structural diagram of Fig. 1, and Fig. 3 is the part explosive view of structure shown in Fig. 1, and Fig. 4 is to assist shown in Fig. 3 Pawl blocks the structural schematic diagram of ratchet state, and Fig. 5 is positioning pin in a kind of specific embodiment provided by the utility model With the fit structure schematic diagram of guidance ball, Fig. 6 is the integral structure schematic diagram of ratchet and pre- bearing up pulley shown in Fig. 3.

In a kind of specific embodiment provided by the utility model, the preload limiter anti-attenuation of limiter safety belt is pre-tightened Mechanism mainly includes mounting disc 1, ratchet 2, pre- bearing up pulley 3 and instantaneous transmission mechanism.

Wherein, structure based on mounting disc 1, is typically mounted on body, is mainly used for installing and carrying remaining components. Ratchet 2 and pre- bearing up pulley 3 are installed in mounting disc 1, and both rotatable.Ratchet 2 is connected with spool 4, can drive spool 4 Synchronous rotary, which is able to drive safety belt when rotated and carries out scrolling, to quickly tighten or loosen safety belt.It pre-tightens Wheel 3 and the bottom end (or top) of ratchet 2 link into an integrated entity, and are mainly used for matching rotation with instantaneous transmission mechanism, and instantaneously pass Motivation structure is connected to the circumferential direction of mounting disc 1, is mainly used for when vehicle sense component judges current needs tightening safety belt rapidly, immediately It generates driving force and the driving force of sharp increase is passed into pre- bearing up pulley 3.

In this way, vehicle sense component detection sends it to instantaneous biography to trigger signal when car body such as collides at the accidents Motivation structure, instantaneous transmission mechanism are immediately performed respective operations, and moment generates the huge driving force to increase severely, and the driving force is transmitted To pre- bearing up pulley 3, so that pre- bearing up pulley 3 be driven quickly to be rotated.

Importantly, due to which pre- bearing up pulley 3 links into an integrated entity with ratchet 2, therefore, when instantaneous transmission mechanism transmits driving force While to pre- bearing up pulley 3, pre- bearing up pulley 3 is able to drive 2 synchronous rotary of ratchet, and ratchet 2 and spool 4 keep connecting, therefore into One step drives 4 synchronous rotary of spool to tense safety belt rapidly to quickly furl safety belt, passenger is tightened present On chair.

Compared with the prior art, ratchet 2 and the design of pre- bearing up pulley 3 are an integral structure by the present embodiment, can be improved preload The preload efficiency of limiter safety belt eliminates the risk of the hiding power transmitting cycle in time of split type transmission mechanism, while reduction pair Store the space hold of housing interior volume.

In a kind of preferred embodiment about instantaneous transmission mechanism, which mainly includes conduit 5, drives Dynamic ball 6 and trigger assembly.Wherein, conduit 5 may generally be bend pipe, can spiral and be wrapped in the circumferential direction of mounting disc 1, and the conduit 5 outlet is connected to the side wall of mounting disc 1.Storage has several driving balls 6 in conduit 5, and each driving ball 6 is in conduit Sequential arrangement in 5, herein preferably, the driving ball 6 can be steel ball, iron ball etc..End in conduit 5 is equipped with triggering group Part, the trigger assembly can be generated driving force on triggering by the triggering of the components such as vehicle sense component on car body moment, thus Push conduit 5 in each driving ball 6 at once successively spray conduit 5, after entering in mounting disc 1, along preset direction according to In the secondary circumferential direction struck on pre- bearing up pulley 3, so that pre- bearing up pulley 3 be pushed to rotate in a circumferential direction.

In a kind of preferred embodiment about trigger assembly, which is the blasting charge, i.e., in trigger assembly Portion stores a certain amount of chemical explosive, the modes such as can light by electric shock and be ignited, in the narrow of conduit 5 after its is explosive The high pressure gas acutely expanded is generated in narrow space, to push each driving ball 6 in conduit 5 rapid using the high pressure gas Spray conduit 5.

Further, preload wheel 3 is pushed to be rotated after spraying conduit 5 for convenience of driving ball 6, the present embodiment is pre-tightening Several have uniformly been opened up in the circumferential side wall of wheel 3 holds ball groove 301.Specifically, can generally be opened in the circumferential side wall of pre- bearing up pulley 3 If 8~16 appearance ball grooves 301, certainly, the quantity of driving ball 6 is usually that comparable (there are guidance balls with the quantity of holding ball groove 301 When 7, the appearance ball groove 301 for increasing corresponding guidance ball 7 is also needed).The concrete shape of the appearance ball groove 301 be it is hemispherical, when each driving After ball 6 sprays conduit 5, driving ball 6 can rotate impact to the appearance ball groove 301 in pre- 3 circumferential direction of bearing up pulley along the side wall of mounting disc 1 In, it after kinetic energy is transferred to pre- bearing up pulley 3, is smoothly installed to and holds in ball groove 301, avoid driving ball 6 chaotic fortune in mounting disc 1 It is dynamic.

Further, it is contemplated that in normal state, each driving ball 6 in conduit 5 does not need to be ejected to mounting disc 1 Interior, to avoid the driving ball 6 under the influence ofs impact vibration of car body etc. in conduit 5 is unexpected from spraying, the present embodiment is in conduit 5 Guidance ball 7 is additionally arranged at head end position.Specifically, material and structure of the guidance ball 7 etc. can be identical as driving ball 6, it is different It is that the positioning pin 8 of perforation is inserted on guidance ball 7.The top of the positioning pin 8 is attached on the top bottom surface of mounting disc 1, The bottom end of the positioning pin 8 is attached in the bottom surface of mounting disc 1 simultaneously.So set, being made using the fixed of positioning pin 8 With ball 7 being guided to be fixed on the exit position of conduit 5, the movement of each driving ball 6 inside restricted conduit 5 prevents it It is unexpected to spray.

Meanwhile the material of the positioning pin 8 is harder crisp, material property belongs to shearing bar, fixed when being impacted by larger shearing Position pin 8 is easy to happen shear fracture.In this way, ensure that trigger assembly on triggering, each driving ball 6 can push the first draw 7 preshoot of ball is led, and smoothly cuts positioning pin 8, guarantees that each driving ball 6 can quickly, in the clear when needing to spray It goes out into mounting disc 1.

Furthermore, it is contemplated that when the accidents such as car body collision occur, interior passenger can under the action of inertia suddenly before Punching, and safety belt is pullled under preshoot effect, loosen it to a certain degree.For safety belt, safety belt is produced at this time Pretightning force decaying is given birth to, i.e., this safety belt tightened is loosened by external force.The pretightning force decaying of safety belt is objective reality The phenomenon that, it not can avoid, but can weaken as far as possible.In view of this, the present embodiment is additionally arranged secondary pawl 9 in mounting disc 1.This is auxiliary It helps pawl 9 that can rotate in mounting disc 1, is mainly used for after each driving ball 6 has hit pre- bearing up pulley 3, safety belt is tightened, it will Ratchet 2 blocks, and prevents ratchet 2 " reversion " --- and when each driving ball 6 successively hits pre- bearing up pulley 3, pre- bearing up pulley 3 is along a direction Rotating Vortex (as shown clockwise), can constantly tighten safety belt, then " reversion " herein is the counter clockwise direction illustrated. If ratchet 2 inverts, safety belt is relaxed, and generates pretightning force decaying.

Specifically, the secondary pawl 9 mainly includes rotary disk 901, snap-arms 902, registration arm 903 and reset arm 904.Its In, rotary disk 901 is arranged in mounting disc 1, and can rotate in rotary disk 901.In general, rotary disk 901 may be provided at At the lateral location of mounting disc 1, and neighbouring ratchet 2 and pre- bearing up pulley 3.It is provided in the circumferential direction of rotary disk 901 towards some diameter The snap-arms 902 extended to direction, which is mainly used among the ratchet being inserted into 2 outer rim of ratchet, by ratchet card Firmly, to prevent ratchet 2 from inverting.Registration arm 903 is similarly disposed in the axial direction of rotary disk 901, and towards another radial direction Extend, which is mainly used for matching with the positioning pin 8 plugged in guidance ball 7.In its natural state, ratchet 2 is smooth Rotation, snap-arms 902 block ratchet 2 without stretching out at this time, on the back side for needing to be connected to positioning pin 8 using registration arm 903, Prevent rotary disk 901 from generating rotation (diagram is clockwise).

It connecing above-mentioned, has been improved in foregoing teachings, positioning pin 8 is shearing bar, easy fracture, in trigger assembly triggering, It can be guided ball 7 and drive rapid cutting, in this way, the registration arm 903 on secondary pawl 9 is put after positioning pin 8 is cut Pine；Simultaneously quickly in view of the triggering speed of trigger assembly, each driving ball 6 can be just whole in very short time (about 0.1s) It goes out to mounting disc 1, that is to say, that the pretightning force decaying of safety belt equally occurs quickly, to guarantee to cut down pretightning force as far as possible Decaying, the present embodiment is additionally arranged reset arm 904 on the rotary disk 901 of secondary pawl 9, while being connected in reset arm 904 Limit spring 10.

Specifically, reset arm 904 is attached in the circumferential direction of rotary disk 901, generally can with 902 relative position of snap-arms, And limit spring 10 is connected on the back side (diagram of being subject to is clockwise) of reset arm 904, the other end is connected to mounting disc 1 On inner wall.In its natural state, positioning pin 8 resists registration arm 903, so that reset arm 904 compresses limit spring 10, and makes to limit Spring 10 keeps compressive state.And under Work turning table, positioning pin 8 loosens registration arm 903, and limit spring 10 discharges elastic force, pushes away Dynamic reset arm 904 and the rotation of rotary disk 901 (diagram is clockwise), snap-arms 902 are extend into the ratchet in 2 outer rim of ratchet Between, ratchet 2 is blocked, prevents ratchet 2 from inverting.

It should be noted that positioning pin 8 is just cut, and the snap-arms on rotary disk 901 when trigger assembly just triggers 902 extend at substantially the same time between the ratchet on ratchet 2, still, due at this time driving ball 6 effect of impact under, pre- bearing up pulley 3 It is to rotate in the forward direction (diagram is clockwise), while limit spring 10 has been released, therefore ratchet 2 can be rotated in the forward direction unhinderedly, Constantly snap-arms 902 can only be pushed aside by ratchet in rotary course.Conversely, after trigger assembly triggering, It, can be at once by the stuck effect of snap-arms 902, since one end of limit spring 10 is connected to again if ratchet 2 attempts to invert On the arm 904 of position, rotary disk 901 is forced to stop fortune by the pulling force of limit spring 10 soon after counter-rotating by a small margin It is dynamic, to substantially cut down the pretightning force decaying of safety belt with this.

The present embodiment also provides a kind of preload limiter safety belt, and main includes band body, storage cabinet and setting in containing box Intracorporal preload limiter anti-attenuation mechanism, wherein the particular content of the preload limiter anti-attenuation mechanism and above-mentioned related content phase Together, details are not described herein again.

The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest scope consistent with features of novelty.

Claims (10)

1. a kind of preload limiter anti-attenuation mechanism for pre-tightening limiter safety belt, which is characterized in that including mounting disc (1), rotatable Ratchet (2) that ground is set in the mounting disc (1), be rotationally arranged in the mounting disc (1) and with the ratchet (2) The pre- bearing up pulley (3) that links into an integrated entity of bottom end, and be connected to the circumferential direction of the mounting disc (1), for need to tighten it is safe Transfer a driving force to the instantaneous transmission mechanism on the pre- bearing up pulley (3) when band, and the ratchet (2) with for furling safety belt Spool (4) be connected.

2. preload limiter anti-attenuation according to claim 1 mechanism, which is characterized in that the instantaneous transmission mechanism includes connecting Conduit (5), the order led in the mounting disc (1) circumferential direction is accommodated in several drivings ball (6) in the conduit (5), with And it is installed on the conduit (5) end, for generating driving force, by triggering moment to push each driving ball (6) edge Preset direction successively strikes the trigger assembly in the circumferential direction of the pre- bearing up pulley (3).

3. preload limiter anti-attenuation according to claim 2 mechanism, which is characterized in that the peripheral side of the pre- bearing up pulley (3) Several appearance ball grooves (301) for matching with each driving ball (6) are uniformly provided on wall.

4. preload limiter anti-attenuation according to claim 3 mechanism, which is characterized in that the trigger assembly particularly for The blasting charge of air pressure motive force is generated in the conduit (5) by chemical explosion.

5. preload limiter anti-attenuation according to claim 4 mechanism, which is characterized in that each driving ball (6) is specially Steel ball.

6. preload limiter anti-attenuation according to claim 3 mechanism, which is characterized in that the head end position of the conduit (5) Place is provided with guidance ball (7), and the positioning pin (8) for shear fracture, the positioning pin are inserted on guidance ball (7) (8) top is connected on the top bottom surface of the mounting disc (1), and the bottom end of the positioning pin (8) is connected to the mounting disc (1) in bottom surface.

7. preload limiter anti-attenuation according to claim 6 mechanism, which is characterized in that also set up in the mounting disc (1) Have rotatably, for blocking the ratchet (2) after each driving ball (6) hits the pre- bearing up pulley (3) to prevent it anti- The secondary pawl (9) turned.

8. preload limiter anti-attenuation according to claim 7 mechanism, which is characterized in that the secondary pawl (9) includes can The rotary disk (901) that is rotatably provided in the mounting disc (1) is connected in the circumferential direction of the rotary disk (901) and is used for Block the snap-arms (902) of the ratchet of the ratchet (2), and be connected in the circumferential direction of the rotary disk (901) and for The positioning pin (8) abuts against, the registration arm (903) in its natural state remaining stationary the rotary disk (901).

9. preload limiter anti-attenuation according to claim 8 mechanism, which is characterized in that the secondary pawl (9) further includes The reset arm (904) being connected in the circumferential direction of the rotary disk (901), and be connected on the rear end face of the reset arm (904) The other end of limit spring (10), the limit spring (10) is connected on the inner wall of the mounting disc (1), in the card When connecing arm (902) and blocking the ratchet of the ratchet (2), the reset arm (904) is tensed to prevent the rotary disk (901) reverse Rotation.

10. a kind of preload limiter safety belt mainly includes band body, store cabinet and is set to the intracorporal preload limit of the containing box Resist damping mechanism strenuously, which is characterized in that preload limiter anti-attenuation mechanism is specially claim 1-9 described in any item pre- Tight limiter anti-attenuation mechanism.