CN201205903Y

CN201205903Y - Prefastening car safety belt coiler

Info

Publication number: CN201205903Y
Application number: CNU2008200548181U
Authority: CN
Inventors: 李小林
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-17
Filing date: 2008-01-17
Publication date: 2009-03-11
Anticipated expiration: 2018-01-17

Abstract

The utility model discloses a retractor for pre-retracting a vehicle safety belt. The retractor comprises a ribbon, a ribbon scroll, a casing, a gas generator and a duct, wherein, the ribbon is wound around the ribbon scroll; a circular turntable is sleeved at one end of the ribbon scroll; a plurality of spherical internal cavities are arranged on the outer margins of the circular turntable; the casing is sleeved at the same end of the ribbon scroll, an end at which the circular turntable is sleeved; a ball bearing gathering device is installed inside the casing; the gas generator is arranged at one end of the duct, and the other end of the duct is connected with the casing in an internally tangent manner; and a plurality of abacus bead-shaped ball bearings are arranged inside the duct, and the outer circumferential surface of each ball bearing is attached seamlessly to the wall of the duct, and is matched with each spherical internal cavity. According to the structure of the utility model, the gas generator unleashes impact upon the ball bearings to allow the circular turntable to rotate after collision happens or before inertia causes the passengers to lean forward, thereby effectively pre-retracting the safety belt to strap passengers to the backrests of the seats.

Description

Pretightening automobile seat belt winder

Technical field

The utility model relates to a kind of automobile safety belt retractor, relates in particular to a kind of pretightening automobile seat belt winder.

Background technology

China utility model prospectus CN2539668Y (day for announcing is on March 12nd, 2003) discloses a kind of pretightening automobile seat belt winder, mainly form by furling part, rack-and-gear running part and gas generator, when automobile generation traffic accident, electronic control package sends instruction and makes producer igniting produce gas to promote tooth bar and move gear is rotated, under the effect of power-transfer clutch, hold tightly and furl axle furling tube is rotated, moment is tightened up safety strap, makes occupant restraint on the seat.Can avoid occupant's preshoot or inclination, assurance can not skid off from safety strap, has prevented that the occupant is subjected to secondary or the repeatedly injury of collision in accident.

The weak point of above-mentioned technology is:

1, the tangent fit structure of rack and pinion makes that contact portion is a point, and the impact that is subjected at instantaneous this point of gas generator explosion is very big, causes the damage that fractures of tooth bar or gear easily.

2, tooth bar is in movement in vertical direction, and it takes up room bigger.

3, the scope of its pretension is little and should not regulate.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of pretightening automobile seat belt winder, can the moment that bumps and before occupant's health inertia leans forward actv. pre-tightening safety strap, the passenger is strapped on the backrest of seat.

For solving the problems of the technologies described above, the utility model provides a kind of pretightening automobile seat belt winder, comprises ribbon, ribbon spool, case, gas generator, reaches conduit; Ribbon is on the ribbon spool, ribbon spool one end is with round turntable, the round turntable outer rim is provided with a plurality of spherical inner chambers, case is set in round turntable one end of ribbon spool, have a ball catcher in the case, conduit one end is equipped with gas generator, and the other end is connected with the case inscribe, the ball that a plurality of abacus bead shapes are arranged in the conduit, the external peripheral surface of each ball cooperates with the catheter wall driving fit and with each spherical inner chamber.

The utility model passes through said structure, can the moment that bumps and before occupant's health inertia leans forward by the impact of gas generator to ball, the drive round turntable rotates, thereby actv. pre-tightening safety strap is strapped on the backrest of seat the passenger.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described in further detail:

Fig. 1 is a front view of the present utility model;

Fig. 2 is ribbon of the present utility model and ribbon spool scheme drawing;

Fig. 3 is a case scheme drawing of the present utility model;

Fig. 4 looks cutaway view for the right side of Fig. 1;

Fig. 5 is the work scheme drawing of Fig. 4 after the gas generator explosion.

The specific embodiment

As shown in Figures 1 to 4, pretightening automobile seat belt winder of the present utility model comprises ribbon 1, ribbon spool 2, case 3, gas generator 4, and conduit 5, ribbon 1 is on ribbon spool 2, ribbon spool 2 one ends are with round turntable, the round turntable outer rim is provided with a plurality of spherical inner chambers 6, case 3 is set in round turntable one end of ribbon spool 2, have a ball catcher 8 in the case 3, conduit 5 one ends are equipped with gas generator 4, the other end is connected with case 3 inscribes, the ball 7 that a plurality of abacus bead shapes are arranged in the conduit 5, the external peripheral surface of each ball 7 cooperates with conduit 5 wall driving fits and with each spherical inner chamber 6.

The external peripheral surface of ball 7 of the present utility model scribbles lubricating oil, itself and conduit 5 walls are made up and reduces friction when sliding.Can establish a spherical guide 9 in the centerline of conduit 5 in addition, spherical guide 9 other ends extend in the case 3 and are positioned at the outer shroud place of round turntable, there is through hole at ball 7 centers, can be set on the spherical guide 9, in the through hole of ball 7, scribble lubricating oil, reduce the friction that ball 7 slides on guide rail.

As shown in Figure 5, when automobile bumps, the electronic controller of automobile can send instruction and allow gas generator 4 explosions, the gas of gas generator 4 generations this moment promotes ball 7 and prolongs the motion of direction shown in the arrow, collide by the face contact between the ball 7, each ball 7 falls in the spherical inner chamber 6 of round turntable successively under impact force action, and drives the round turntable rotation, and then drive ribbon rotating shaft rotation, make ribbon 1 twine and tighten up.Behind the ball 7 oblong dial rotation half cycles in gravity and action of centrifugal force fall into ball catcher 8 in the case 3.

The utility model is by above-mentioned principle, can the moment that bumps and before occupant's health inertia leans forward actv. pre-tightening safety strap, the passenger is strapped on the backrest of seat.

Claims

1. a pretightening automobile seat belt winder is characterized in that, comprises ribbon, ribbon spool, case, gas generator, reaches conduit; Described ribbon is on described ribbon spool, described ribbon spool one end is with round turntable, described round turntable outer rim is provided with a plurality of spherical inner chambers, described case is set in round turntable one end of described ribbon spool, have a ball catcher in the described case, described conduit one end is equipped with described gas generator, the other end is connected with described case inscribe, the ball that a plurality of abacus bead shapes are arranged in the described conduit, the external peripheral surface of each ball cooperates with the catheter wall driving fit and with described each spherical inner chamber.

2. pretightening automobile seat belt winder according to claim 1 is characterized in that the external peripheral surface of described ball scribbles lubricating oil.

3. pretightening automobile seat belt winder according to claim 1, it is characterized in that, the line of centers of described conduit is provided with a spherical guide, this spherical guide extends in the described case and is positioned at the outer shroud place of described round turntable, there is through hole at described ball center, is set on the described spherical guide.

4. pretightening automobile seat belt winder according to claim 3 is characterized in that, scribbles lubricating oil in the through hole of described ball.