DE2620019A1 - TWO RESPECTIVE RETRACTING DEVICE FOR SEAT BELTS - Google Patents

Description

AMERICAN SAFETY EQUIPMENT CORPORATION ENCINO, CALIF. (V.St.A.)

DOUBLE RESPECTIVE RETRACTOR FOR SEAT BELTS

The invention relates to a doubly responsive retraction device for seat belts of vehicles for prevention pulling off a belt webbing upon occurrence of a predetermined vehicle or belt webbing acceleration with a roller provided on a shaft rotatably arranged in a frame, a device for locking one revolution of the roller in the withdrawal direction of the webbing, one arranged on it for the purpose of rotation with the shaft Inertial mass, a suspension device assigned to the shaft for rotationally driving the inertial mass during rotation of the shaft, with constant speed of rotation of the shaft causing constant speed of rotation of the inertial mass as well as rotational acceleration of the shaft one revolution of the inertial mass at a lower speed than that of the Shaft, one rotatable on the inertial mass for the purpose of actuation

609849/0048

the locking device provided locking pawl and a different rotational speed of the inertial mass and means responsive to the shaft for pivoting the pawl into engagement with the locking means.

Retraction devices for seat belts are becoming increasingly popular in automobiles. They enable that the seat belt can normally be withdrawn freely, i.e. it can be withdrawn from the retractor for adjustment is pulled out. During a collision, however, the retractor locks in order to continue To prevent pulling off the webbing.

Different pull-in devices respond to certain rotational speeds or speeds of the roll or spool of the pull-in device. If the latter is exceeded, the pull-in device locks and prevents the webbing from being pulled off any further. The disadvantage of this retractor is that the locking speed is easily reached during the initial withdrawal of the seat belt. Thus , the belt strap must be pulled out of the retraction device very carefully and slowly so as not to exceed the locking speed.

To avoid this disadvantage, pull-in devices

609849/0648

executed responsive to the acceleration of the seat belt and the roller, and the retraction device according to the invention responds to the take-off acceleration occurring with the webbing and the roll.

In the following US-PS pull-in devices are described, various of which are based on an acceleration of the belt webbing address: 7oo 763, 888 418, 1 393 57o, 2 845 234, 2 845 233, 3 122 338, 3 292 744, 3 323 749, 3 446 454, 3 45o 368, 3 476 333, 3,666,198, 3,695,545, 3,7oo 183, 3,779,479.

If, for example, according to US-PS 7oo 763 the roller is accelerated, the inertial mass tends to lag behind this acceleration, and a bolt swivels into teeth via a hinge system in order to block rotation of the roller. Similar training show the subject matter of U.S. Patents 888,418, 1,393 and 3,450,368 Gear arranged in the inertial mass. During normal operation, the gear is driven by the rotation of the roller. However, when the roller is accelerated, the motion of the inertia weight disengages a gear from the Gear, whereby the locking of the retraction device is brought about. Examples of such pull-in devices show the subject matter of U.S. Patents 2,845,233, 2,845,234 and 3,122,338.

Other patents show inertial masses acting on them

809849 / 084S

helical threads extending from the axis of the roller are provided. When the role is accelerated,. the inertial mass rotates as a result of its lag on the thread until it catches the locking device of the retraction device cooperates; See U.S. Patents 3,323,749, 3,446,454, 3,476,333, 3,666,198, 3,7oo 183, and 3,779,479. Other publications show somewhat modified locking devices of the retraction device. So the subject of the US-PS 3 292 744 e.g. an inertial weight arranged on the belt which, when the belt accelerates, revolves around its center of gravity rotates, whereby a lock between the inertia plate and several stop members is brought about. According to the US Pat. No. 3,695,545 moves the entire roller on an elongated shaft when the belt is accelerated.

Known retraction devices are also equipped with devices for scanning the vehicle acceleration and vehicle position fitted. These systems cause the retraction device to be blocked when the vehicle reaches a predetermined level Experiences acceleration, overturns or overturns, iü Systems that respond to vehicle inertia or those that respond to belt acceleration are sufficient for certain situations react, in each case not enough to hold vehicle occupants securely. It was because of that it has often been proposed to combine these two systems in a single pull-in device.

609849 / 0S4S

Examples of this can be found in the following US Pat. 3 664 6oo, 3 8o2 642, 3 819 126.

According to US Pat. No. 3,2o3,641, an inertia plate rotates with the roller; however, it runs on held in slots in the plate Bullets. If the rotation of the roller exceeds that of the inertia plate, the balls roll with respect to the inertia plate and cause it to move axially with respect to the roller and cause the locking device to engage. The sensor To detect the vehicle inertia, a pendulum engages and sustains the inertia plate. Through this there is the same relative movement between the roller and the inertia plate, which causes the retraction device is blocked. Similarly, are the subject matter of U.S. Patents 3,343,763, 3,552,676, 3,664,6oo, 3,8o2,642, and 3,819 fitted.

According to US Pat. No. 3,430,891, two sets of teeth are provided on the roller. The first set is attached to the roll and then cooperates with a locking cam when this is displaced by the vehicle inertia sensor. The second sentence flexible teeth is arranged on the roller and swivels outwards when the belt is suddenly accelerated to move with the Locking cams cooperate for the purpose of locking the role.

The object of the invention is to provide a compared to the

609849/0648

to provide improved, doubly responsive pull-in device according to the prior art described above. She should go so far be made of plastic parts as possible, with the load being transferred from the belt to the retraction device and not via the vehicle inertia sensor and the belt acceleration sensor. It should have a minimum of parts and conventional parts for installation in the vehicle inertial sensor and the belt acceleration sensor. Furthermore, a resilient jumping off or rebounding should be the pawl can be prevented from the edges of the ratchet teeth. Finally, both the vehicle inertia and the Belt acceleration sensor can be improved to lock the retraction device as a result of corresponding changes in state to ensure, regardless of the improvement in the cooperation between the two systems.

This object is achieved according to the invention in that a vehicle inertia sensor and a device for it Connection with the pawl and its pivoting into engagement with the locking device when the vehicle inertia changes are provided.

The pull-in device according to the invention, which can be actuated twice, thus has a rotatably mounted on a frame Shaft provided on the roller and a device for locking the roller against a withdrawal movement of the belt. It is furthermore an inertial mass arranged on the shaft

intended. It revolves with respect to the wave. Finally, one is responsive to changes in vehicle inertia Inertial weight provided. The retraction device according to the invention is characterized by the arrangement of a pawl and an attachment means thereof to the inertial mass for engagement with the locking means. This prevents the belt from being pulled off. A cam is arranged on the shaft, and it is connecting means for the cam and the pawl present to transmit rotary motion to the inertial mass of the shaft and then to turn the pawl into Engaging with the locking device when the webbing acceleration moves the shaft faster than the inertial mass circulates.

A gear is arranged on the shaft for the purpose of revolving with respect to it. It is to prevent its circulation with the Shaft can be acted upon by the inertia weight. A spring connects the pawl and the gearbox to provide rotational movement from the pawl to the transmission and then to the pawl into engagement with the locking device move when the inertia weight prevents rotation of the gearbox, thereby preventing the roller from further withdrawal movement to lock. Finally, a device for preventing the locking member from ricocheting is provided in order to ensure that the locking device engages the front of a ratchet of the roller and not on the

609849/0648

The tip or edge of a ratchet tooth, in order to get off to bounce off there.

Further details, features and advantages of the invention emerge from the following description of several exemplary embodiments as well as based on the schematic drawing and the subclaims. Here show:

Fig. 1 is an exploded view of an embodiment of the double-responding retraction device according to the invention ;

Fig. 2 is a side view of the embodiment of FIG. 1, the retraction device in Normal state and can rotate freely without being affected by the vehicle inertia sensor or the webbing acceleration sensor to be prevented from pulling away;

FIG. 3 is a partial side view similar to that of FIG. 2, the webbing acceleration sensor being the retraction device has locked (Fig. 2 and 3 do not show a gearbox 6o again, so that the inertial mass, the pawl and the cam are visible);

Fig. 4 is a side view of the first embodiment of the invention, wherein the vehicle inertial sensing mass

609849/0648

initially touches the gearbox just before the retractor is locked (the gearbox 60 is shown in Figures k and 5);

Fig. 5 shows the doubly responsive retraction device immediately after the vehicle inertia sensor intervenes in the transmission, whereby the retraction device is locked;

Fig. 6 is a section through the vehicle inertia sensing device used in the inventive, doubly responsive Pulling device is used;

7 shows a section along line VII-VII of FIG. 2 to show the mutual arrangement of the parts the vehicle inertia and webbing acceleration sensors; the doubly responsive retraction device according to the invention;

8 is a side view of a second embodiment of the invention in the locked position;

FIG. 9 shows a section along line IX-IX of FIG. 8;

Fig. Io is a perspective view of a pawl out of engagement with ratchet holding spring and

609849/0643

-ίο-

Fig. 11 is a perspective view of a modified embodiment of the second embodiment the transmission shown in the invention.

A becomes effective for preventing withdrawal of the webbing either upon the occurrence of a predetermined vehicle or strap acceleration, that is, two times responsive retraction device includes a roller and in a frame rotatably arranged axis or W _e lle on. In a first exemplary embodiment, the pull-in device is designated by Io, the roller by 11 and the shaft by 12, which revolves in a substantially U-shaped frame. The latter is attached to a vehicle 9 (FIGS. 2 to 5). A leaf spring, not shown, rotates the roller counterclockwise (FIGS. 1 to 5) in order to wind a belt webbing 14 onto the roller 11.

A locking device is provided to lock the roller against rotation in the direction of pulling off the belt. In the first embodiment, it has ratchet teeth on both sides of the roller (Fig. 1 and 7). Locking members 16 are on a locking rod 17 is provided which is rotatably arranged in the frame in a known manner in order to cooperate with the ratchet teeth and to prevent the roller from rotating in the direction of pulling off the webbing (clockwise in FIGS. 1 to 5). The locking device comprises a locking lever 18 which engages lugs 19 of a locking cup 2o. A slight twist of the locking cup 2o clockwise causes the approaches

609849/0848

pivot the locking lever 18, whereby in turn the locking members 16 are pivoted on the locking rod 17 and then cooperate with the ratchet teeth 15. A spring 24 arranged at one end on the frame 13 tensions the locking rod 17 in a position in which the locking members 16 do not interact with the locking teeth 15. Therefore it can be seen that the locking members have to be driven via the lugs 19 in order to be able to interact with the ratchet teeth.

For the purpose of revolving with respect to the shaft, an inertial mass is arranged on it. In the exemplary embodiment, the inertial mass is 25 arranged on the shaft 12. It has a bore through which it rests on a cylindrical part 27 of the shaft is arranged (Fig. 1 and 7). It should be noted that the locking cup 2o is also designed to rotate with respect to the shaft 12 is provided on the cylindrical part 27. A narrow projection on the back of the locking cup 2o reduces the Friction between the locking cup and the frame 13. (Fig. 7).

An inertial weight is provided which is responsive to changes in the inertia of the vehicle. To clearly differentiate the description, the inertial mass is referred to below as element 25 and the inertial weight described in more detail below as element 3o. In the exemplary embodiment described, the inertia weight 3o essentially has a cylindrical metal weight 31, which is in a housing fastened to the frame 13 by means of a fastening part 36

609849/0648

A 2620P19

is arranged. One connected to the housing 32 at a joint 34 Cap 33 has a lever 35. If the vehicle experiences a change in its inertia, the weight shifts from its normal position (Fig. 2 and 3) to a non-equilibrium position (Figures 4 to 6). In this deflected position, the weight 31 contacts the underside of the cap 33 and thus pivots the lever 35 upwards in the way of teeth 61 of a gear 6o. The function of this transmission 6o is described in more detail below will.

For the purpose of engaging the locking device to prevent the webbing from being pulled off, there is a locking pawl and a device intended for their attachment to the inertial mass. In the embodiment described, in particular FIGS. 1 to 5 and 7, the pawl 4o is provided on the inertial mass 25. It has an opening 41 and is around a pivot pin 46 pivotable. The pawl portion 42 of the pawl is formed in such a way that "he with the inwardly directed Teeth 21 of the locking cup 2o cooperates (Fig. 2 to 5). With such an intervention, the locking cup is turned clockwise rotated (Fig. 3 and 5); here the lever 18 is pivoted, whereby an engagement of the locking members 16 in the Ratchet teeth 15 is effected.

The pawl 4o also has an arm 43. A calibration spring 45, which is part of a spring device, connects the arm 43 to a pin 44 of the inertial mass,

609849/0648

around the pawl 4o inwards towards the shaft to bias and to prevent engagement of the pawl part 42 in the teeth 21 of the locking cup 2o. As long as the strength the calibration spring 45 is not overcome - this will explained below - the pawl part 42 does not engage in the teeth 21, whereby the roller is not locked, but is released into circulation.

A cam is provided on the shaft. A device for connecting the cam to the pawl transmits the rotary movement the shaft on the inertial mass and moves the pawl into engagement with the locking device when the webbing acceleration the wave accelerates faster than the inertial mass. According to the first embodiment, in particular Figures 2 and 3 are the cam 50 on a non-cylindrical part 51 of the shaft 12 arranged. This part 51 cooperates with an opening 52 of the same configuration in the cam 5o. The latter thus rotates with the shaft 12.

A bolt 47 fastened to the pawl 4o is seated in a cam slot 53 of the cam 5o. It exists that way a resilient connection between the inertial mass 25 and the shaft 12, whereby the shaft 12 is enabled with respect to the inertial mass 25 to revolve against the spring force, but the mass 25 is set in rotation by the shaft 12. In the illustrated embodiment, the resilient connection acts as follows: A rotation of the shaft 12 causes a rotation

609849/08 48

of the cam 5o. In this way, the cam slot 53 exerted a force on the bolt 47 disposed therein. This force tends to the pawl 4o around the Pivot pin 46 to rotate around counterclockwise (Figs. 2 & 3) when the shaft and cam are pulled out as a result of the belt strap 14 in a clockwise direction. One is opposed via the calibration spring 45 acting on the arm 43 directed force exerted on the pawl. As long as the calibration spring 45 on the pawl acting force is greater than that originating from the cam 5o, the rotational movement of the shaft 12 is transmitted to the bolt 47 and from here through the pawl 4o on the pivot pin 46 of the inertia mass 25. In this way, a The rotary motion of the shaft is transmitted to the inertial mass 25, thereby causing it to coincide with the rotary motion of the shaft to run around. It should also be noted that the calibration spring 45 via the spring connection when the inertial mass rotates 44 is pulled on the inertial mass 45 clockwise, whereby the on the arm 43 of the pawl 4o acting force amplified and pivoting about the pivot pin 46 in the direction of engagement in the locking cup 2o resistance is opposed.

If the belt webbing is accelerated 4o strongly, as e.g. is the case during an impact, a number of processes take place in the device according to the invention. The celebration The shaft arranged on the roller usually accelerates

609849/0648

immediately to match the webbing acceleration. However, since the inertial mass 25 over its rotational movement gets communicated resilient connections, and since it is heavy and has mass, it rushes the shaft and thus the cam after. This lag leads to a movement of the cam slot 53 relative to the bolt 47 (see the differences between Fig. 2 and 3), which leads to a rotation of the pawl 4o about the bolt 46 and the oppositely directed force of the calibration spring 45 overcomes. The pawl part 42 then acts with a tooth 21 on the inside of the locking cup together, whereby this is rotated clockwise, so as to pivot the locking members 16 in the ratchet teeth 15 and each to prevent further withdrawal movement of the roll.

There are also provided a gear and a device for arranging it on the shaft for the purpose of rotation with respect to this. The inertia weight can engage the gearbox to prevent it from rotating with the shaft. The function of the transmission is shown in Figures 4 and 5. In Figures 1 and 7, the transmission 6o has a central opening 62 in which a bushing 54 of the cam 5o is arranged. The gear 6o can rotate freely with respect to the cam 5o and thus also with respect to the shaft 12. A washer 63 extends over the central area of the cam 6o and a screw 64 screwed into the shaft 12 holds the washer 63 »the gear 6o, the cam 5o, the inertia mass 25? And the locking cup 2o in the correct position with respect to ^{1 of} the shaft 12. Alternatively, can

609849/0648

the shaft 12 have a bore so that they are as at 12a (Fig. 9) can be expanded by machine. This widened part 12a then replaces the screw 64.

Its spring connects the pawl with the dsm gear to transmit a rotary movement from the pawl to the gear and to bring the pawl into disengagement with the locking device when the inertial weight is one revolution of the transmission prevented to block the roll against further removal. According to the first embodiment of the invention according to the 5 and 5, the spring 7o is C-shaped and has a downwardly bent spring into an opening 48 of the pawl 4o arranged part 71 and an upwardly bent part 72 extending into an opening 65 of the transmission.

In the second exemplary embodiment, the transmission 6o has the C-shaped spring as an injection-molded part "see FIGS. 8 and 11. This C-shaped spring part 73 has a hook-shaped end 74 for cooperation with a bolt 48a of the pawl 4o Mistake.

When the pawl 4o revolves around the shaft 12, the C-shaped spring revolves around the shaft and transmits a rotary movement on the gearbox 6o. Therefore, the transmission 6o runs in normal operation with the shaft 12 um. When the inertia of the vehicle changes, however, the inertia force 50 acts with the teeth

609849/0648

~ ¹⁷ ~ _/; . 2620Q1 £

61 of the transmission βο together and prevents further rotation. A slight pulling off or pulling out of the belt strap 14 causes a revolution or a rotation of the shaft 12 in the W & r · * · pointer since the pawl © 4 © wide ©? ue. di © Wsll © 12 ts »- running g becomes energy is fisr F @ el © F 7 © Ebgo ^ Msirt (FIg ₀ 3} =

Tuck is. the spring 7 © saved® lasF / gi © mriäsf as opening 48 of the pawl 4 © _e Di © öffmiBg 48 oefinds'ä slot on the other side © & ®s B ^ ehholm & is ^ JS @m Elia ^ esrssill 42 _s and the force the barrel? 7 © aat dae Sgstrelaci: ^ dis Sb © f ^ 11Me ^ m the pivot pin 46 © lit gegen der Gggezfemft d © ^ Efilitoisrim feder 45 zn arelmiia Eb s © i daraaf Mngewiesesig da £ i gsglielies slight pulling off of the strap of the, squat 5o around a © a sufficient amount three ^ öp ¹ UE © iae Ve ^ seSg p iß die lock &risSitiLOs; su sstESgli ^ niaao ^ MeSa Isaiaa ο, © ^ H selaii'cz 53 fersites ⁵ als cl @ r Bis ^ efeüsssi ⁵ d © s Bo1s @ eils 47 a f'üiix-t g @ ia ₉ ma so ein® g® " fi§s © Dr-efe-aag, any © rotation of the! iosksns 5 © z'-i © raO

i © Fed ©! ³ 7o acts there &'tlbeF liiaauas smf ®is © two © Ar-t with the

s ³ liafln © des aiciatiaalauif © aden © @ triebes βο die W @ ujs ^ 7s © lsi © Eraft sasf die Sp © ^ zicliE2 & e 4 © gg g eii di © Sp © ir-rfsli23ls © 4o ^ b die Uslle 12 _e

Si @ g @ l ^ aft äat das Βθ ^ ογ-θ ^ θειο di © fräglisits & siss © 25 besüglicfe

k @ iis 5 © ffi®, ©] fi © iles gii, lass © ia _s woterch sine ^ ss ^^ isiroMag £ ad © 2 "- gl®i © lH9a Weis® wie" bsi des, Syi ^ eoaaissseSilT ^ iaigtMggseEgor- fc is effective.

• j ρ

The resilience or suspension of the C-spring is to provide a suspension between the gear 60 and the pawl 4o required so that the pawl can set the locking cup 2o in rotation when the gearbox is shut down «

When the inertia weight 3o in its not cooperating with the gear home position is returned, causes the spring To reset the comparatively light transmission in the position according to "FIG _c 4 _e In this position, a small force from the C.- £ örmIgen Fede- exerted clockwise • supports iis the calibration spring 45 in the arrangement of the pawl member 42 out of engagement with the lock cup 21 and oeil the * reliable and rapid disengagement-intefering with respect to the lock cup helps _t when the inertia weight 3o because releases ~ gear og.

If the pawl comes out of engagement with the locking cup 2o and they, as well as the cam 5o, the gear 60 and the celebration 7o are in their normal state, the spring 24 of the locking rod 17 rotates as locking members out of engagement with the Spsrrzähnen 15 νατΛ the Locking lever IS _{9 to} return the locking cup 2 © to its normal position (Fig. 2 and 4).

In the following description, the vehicle inertia and the belt strap sensor are referred to as an emergency sensor. A device for preventing the pawl © from jumping back or ricocheting off

6O9S49 / OS4C

is connected to the emergency sensor to ensure that the pawl engages the ratchet teeth without the pawl bouncing off the edge of a ratchet tooth in the way. This ricochet is a condition that occurs when the locking member comes into engagement with the edge 15a of the ratchet. If this condition occurs, the edge 15a of the rapidly rotating roller rotates the locking member 16 clockwise (Fig. 2 to 5, 8), and the roller could have rotated so far that the seat belt loosened and an unsafe condition has been brought about before a renewed intervention was brought about via the emergency sensor · Therefore it is an advantage to prevent the pawl from being thrown back.

The invention avoids such hurling back by arranging the same number of teeth 21 on the inside the locking cup as well as locking teeth 15 on the outside of the roller. This can be seen in particular from FIG. 8. Let it be noted pointed out that the rotation of the shaft 12 is transmitted to the bolt 47 on the pawl 4o by means of the cam. Of the The rotation of the shaft is linked to that of the roller. Therefore, the locking cup 2o and the roller 11 run during the engagement of the Blocking device 4o in the blocking cup 2o together. By messing up an equal number of teeth 21 on the locking cup like τοπ ratchet teeth 15 on the roller 11 is the position of the respective, from the locking member 16 acted upon locking tooth 15 with respect to the ■ Locking member 16 always during the same closing conditions glslhe. If the arrangement is set so that the

Locking member 16 on a locking tooth 15 in that shown in FIG Way occurs, the locking of the locking member 16 with each locking tooth 15 takes place in the same way.

In the first embodiment, the shaft 12 is dimensioned and fixed on the roller 11 that the angle of the cam 5o, which is fixed by the recess 52 at the machined end of the shaft, is aligned with the ratchet 15 of the roller 11 " The second embodiment (Fig. 9) is cheaper. The cam 5oa is modified to cooperate with the shaft 12. This is also changed and has teeth 12b on its outside, and the cam 5oa is also with Teeth (not shown) are provided on the outside of the opening 56 in the area of the inside of the cam 5o. The cam 5o is attached to the shaft 12. Before the addition of the essay 55, the function of which will be described in the following, something will be done Play between the cams 5o and the shaft 12 allows «.

When assembling the retractor, prior to insertion of the attachment 55, the belt quickly pulled off to bring about the locking. It is pulled so strongly that the wave is rotated to its extreme position with respect to the cam. This is then the aligned position in which the locking cup is locked a correct engagement of the locking member 16 in a locking tooth 15 of the roller 11 brings about. To the relationship between To maintain the shaft and the cam, the attachment made of soft plastic is over the shaft 12 into the recess 57 of the

609849/0648

Cam used. The soft plastic allows the teeth 12b of the shaft and those provided on the inside of the cam to to grab into the attachment and fix the position of the cam and shaft. The attachment can be designed so that the washer 63 is no longer necessary. In this way, the ricochet of the locking member is prevented, and a simplified one Device for aligning or aligned arrangement of the device for preventing the pawl from being thrown back is also created.

Important conclusions can be drawn for the construction of the dual response retractor of the invention in the manner discussed above. Neither the pawl 4o, the cam 5o, the gear 6o nor the locking cup 2o are used preventing the webbing from being pulled off. These parts can thus be manufactured from plastic in a cost-saving manner. When the locking member 16 is brought into engagement with a locking tooth 15 of the roller 11, the load is transmitted to the frame. The other parts only serve to pivot the locking members into engagement with the locking teeth. The preferred Embodiment, the inertia mass 25 and the inertia weight 31 are made of metal, so that they have a higher inertia provide. The springs are also made of metal, since metal springs are inexpensive

In the illustrated embodiment, a plastic cover 22 is provided for protecting the device against contamination and deterioration of their B _e drive.

609849/0648

Claims (1)

PATENT PROVISIONS fly Double-acting retraction device for seat belts of vehicles to prevent a belt strap from being pulled off when a predetermined vehicle or belt strap acceleration occurs with a roller provided on a shaft rotatably arranged in a frame, a device for blocking a rotation of the roller in the withdrawal direction of the belt strap, one purpose Rotation with the shaft arranged on it inertial mass, a suspension device assigned to the shaft for rotationally driving the inertial mass when the shaft rotates, with constant rotational speed of the shaft causing constant rotational speed of the inertial mass and rotational acceleration of the shaft rotating the inertial mass at a lower speed than that of the shaft, a rotatably provided on the inertial mass for the purpose of actuating the locking device and a pivoting device responsive to different rotational speeds of the inertial mass and the shaft the pawl in engagement with the locking device, characterized in that a vehicle inertia sensor and a device for connecting it to the pawl and pivoting it into engagement with the locking device when the vehicle inertia changes are provided. 609849/0648 2. Retraction device according to claim 1, characterized . that the vehicle inertia sensor furthermore has a gear (6o) rotating on the shaft (12) as well as a weight (3o) that detects changes in the vehicle inertia, a fastening device for the weight to prevent the gear from rotating at a certain acceleration of the vehicle inertia sensor and a gear ( 6o) with the pawl (4o) for transmitting a rotational movement of the inertial mass (25) to the gear (6o) and for moving the pawl (4o) in engagement with the locking device when preventing rotation of the gear by means of the weight connecting device. 3. Retraction device according to claim 1, characterized . that the pawl (4o) has an arm (43) cooperating with the locking device, a bolt connecting the pawl (4ο) to the inertial mass (25) and a device opposite the bolt on the pawl (4o) for connecting the gear connecting device to the pawl ( 4o) for pivoting the arm (43) around the bolt when the transmission is stopped. 4. Retraction device according to claim 1, wherein the roller ratchet teeth and the locking device has a locking member movable into engagement with the ratchet teeth, characterized . that the locking device has a locking cup (2o) with inwardly directed teeth (21), 609849/0648 wherein the pawl (4o; for the movement of the locking member (16) is engaged by the locking mechanism (15) in the Teeth (21) of the locking cup (2o) engages. 3. A method for programming a retraction device to prevent the pawl from striking the edge of its ratchet tooth, the retraction device comprising a roller provided with ratchet teeth, which is arranged on a shaft provided rotatably in a frame, and wherein on the frame for engagement in the Locking teeth and a locking member is provided to prevent the roller from rotating in the withdrawal direction, a locking cup provided with teeth for rotation on the frame, a device connecting the locking cup to the locking member, so that one rotation of the locking cup causes the locking member to engage in the locking teeth, a pawl pivoting into the teeth of the locking cup and a pawl drive device rotating on the shaft for pivoting the locking pawl into the locking cup and rotating the locking cup to bring the locking member into engagement with the locking teeth, characterized in that on the locking cup (2o) the the same number of teeth (21) as ratchet teeth (15) is provided that the ratchet drive device rotates with respect to the shaft (12), that the shaft (12) is set in rotation, that the locking cup (2o) to engage with the pawl (4o ) 60984S / 0848 tr 262001S is brought usic, 4aS the Well © (12; rotates until the locking device (2o) moves the locking member (16) in the path of the locking teeth (15) to interrupt the rotation of the shaft (12) and that then the pawl drive device on the Shaft (12) is fixedly arranged _r whereby the position of the locking cup (2o) is fixed with respect to each locking tooth, since each is acted upon by the locking member (16) and the position _c 6. Retraction device with a roller and ratchet teeth arranged thereon, the roller being arranged on a shaft rotating in a frame, with a locking member engaging in the ratchet teeth to prevent rotation of the roller in the withdrawal direction, a locking cup provided on the frame and a locking cup with the locking member connecting device for moving the locking:> member in engagement with the locking teeth when the locking cup is rotated and with an emergency sensor for rotating the locking cup when an emergency is detected, in order to bring the locking member into engagement with the locking teeth ₀ marked by a programming device Initiation of the rotation of the locking cup (2o) by means of the emergency sensor when the locking member (16) is in a predetermined position with respect to any locking tooth (16) so that it is at a predetermined one. Point of the locking tooth (15) hits ₉ when the rotation of the locking cup (2o) drives the locking member (16) « SQ984S: / GS4! 7. Retraction device according to claim 6 _: characterized in that the locking cup (2o) is provided with the same number of teeth (21) as locking teeth. 3. Retraction device according to claim 6, characterized in that the emergency sensor has a locking pawl (4o) and a locking pawl drive device for pivoting the locking pawl into engagement with the locking cup (2o) as a result of an emergency signal, furthermore a device for arranging the locking pinch drive device to limit the circulation on the IiSXIe ₅ wherein the ratchet drive device can take such a direction on the shaft that the ratchet (4o) rotates the locking cup in its extreme rotation. When the locking member (16) engages in a ratchet tooth (15) at a predetermined point and means (55} for mounting the ratchet drive means on the shaft (12) in that direction. 9. Retraction device for winding a webbing and Preventing it from being pulled off when a certain belt acceleration is exceeded with a roller and a shaft rotatably arranged in a »frame, a locking device to prevent rotation of the roller in the withdrawal direction, one on the shaft for rotation with respect to this inertial mass, one on the inertial mass for the purpose of engagement in the locking device for locking the roller dr-ehbar arranged locking pawl and 699849/064 8 a device connecting the inertial mass resiliently to the shaft for rotating the inertial mass with the shaft, in order to make the inertial mass rotate with the shaft, the device allowing a rotation of the shaft with respect to the inertial mass against the force of the spring device, characterized by one on the shaft (12) arranged cam (5o) with an arcuate cam slot (53) and a bolt (47) extending from the pawl (4o) for engagement with the cam slot (53) to lift the bolt (47) and the pawl (4o) to rotate into engagement with the locking device when the inertial mass (25) rotates slower than the shaft (12) during the acceleration of the belt webbing (16) when it is pulled off, in order to lock the roller (11). Io. Retraction device according to claim 9, characterized by locking teeth (15) arranged on the roller (11), a locking member (16) of the locking device engaging in the locking teeth (15) and a device between the locking pawl (4o) and the locking member (16) for programming the arrangement of the locking element (16) on the locking teeth (15) at a predetermined point to prevent the locking element (16) from ricocheting off a locking tooth (15) during the locking of the retraction device. 3/0