FR2462915A1 - Delayed action release for vehicle safety belt - has inertia of rotating weights driving multiplier gearing and release rack under pull - Google Patents

Abstract

The release unit comprises two pairs of weights (3), each pair being fixed to an arm. The centre point of this arm has a spur gear, forming a pivot and meshing with a double pinion gear (2). One set is positioned each side of a rack (1), retained by a spring. The smaller gear of each double pinion meshes with gear teeth each side of the rack and, when this latter is pulled continually rotates the gearing against the inertia of the weights until the unit is released. A short pull has no effect.

Description

1st.

: Anchoring system with automatic delayed opening even under continuous traction effect.

This invention relates to seat belt fasteners.
-security and allows total automatic separation of the two by
-ties of the anchoring system without manual intervention.

the existing fastening systems and equipping
all motor vehicles have a drawback
major: they do not fully release the user after a shock
serious.

 the classic fixed-tension belt keeps him attacked. - checked at its headquarters.

the retractable belt requires cancellation almost
- full of tensile force to relax and release it
partially.

This very simple mechanical assembly, object of the invention
uses the inertia of the masses to gradually release the energy
kinetic momentum generates during a violent and brief pull
or moderate and prolonged, applied to one or both parties
of this whole and cause their total separation.

It is composed of a fixed part including weights
are (3) mobile on the radius of their orbit by inertia, and so
-lidaries of a multiplier gear system (2), their
printing a rotary movement, relative to the tensile force
received through a rack (i) constituting the
part of the whole.

The operation is as follows:
the rack, movable part of variable length, undergoing traction, causes 3a rotation of the gear assembly mass -lottes and, the relationship ending, escapes creating the separation of the two parts of the anchoring assembly .

The exhaust or non-exhaust of the rack is modulated according to the power and the duration of the received tration:
First case: very violent and very brief traction does not allow
not the rotation of the weights and the mesh creation undergoes only a very slight movement of translation.

Second case: very violent traction and of longer duration
-go causes the rotation of the weights which, the traction exerted on the rack having ceased, continue their action by their own inertia and eject the rack out of the fixed part.

Third case: the traction is of some power but con
continuous and prolonged, the rack causes the rotation of the assembly and also escapes, achieving separation of the anchoring system.

The main idea of this invention resides in three main points:
- during a light or medium and brief impact, the system ensures complete safety (1st case)
- during a very violent shock but of longer duration the system keeps the user during the shock and releases him from his belt after (2nd case)
- when there are successions of pulls due to "barrels", the compensating system of recall of the rack assu -re closure during this phase. If the user is in an abnormal position and exerts a continuous pull on his belt while it is impossible for him to reach manual opening, the system opens by himself and releases him (3rd case)
This set has a reminder, gear-weights, by springs, in the rest position which allows the constant tension of the belt by compensating for the short translational movements which can be applied to the rack and which did not motivate its ejection.

 A manually operated dtexentric system allows the gear-flyweight assemblies to move away from its axis to re-insert the rack, so that the rack does not cancel the action of the return springs when rearming the anchor assembly.

Claims (2)

 1 ~ Device allowing the automatic and delayed separation of the two parts of a seat belt anchoring assembly without manual intervention, conditioned by the limitation and duration of the 11 pulling force received and even effecting under a continuous traction effect, characterized by the fact that the assembly is composed of a rectilinear rack utili -sant by means of gears the motricity or frei-swimming obtained by the rotation of inertia masses .  2 Device according to claim 1 characterized in that the mechanical escapement is regulated by the bias of the mass inertia.