Self locking retractor for safety belts.

摘要

1. Self-locking winding retractor for at least one vehicle safety belt, comprising a mandrel (5) rotatively mounted in a support (1) and adapted to wind up the girdle of the safety belt, the axis of the mandrel being horizontal or inclined at a certain angle, said mandrel being biased by a torsion spring (62) in the winding direction, and a locking device (16, 19, 28) which under the effect of a shock blocks the mandrel (5) against rotation while preventing the girdle from unwinding, said locking device comprising an inertia wheel (28) biased by an elastic element (32) and being controlled by an acceleration detector (35) including an inertia mass (43) cooperating under acceleration or deceleration detection conditions with an oscillating lever (44) adapted to block the inertia wheel (28), said device being adapted to be returned substantially into the same position whichever the inclination of the axis of the mandrel (5) of the retractor may be, by means of a first housing (36) affixed by one its lateral faces onto one face (3) of said support (1) of the retractor, and another lateral face (39) of which has an orifice (41) for fixing a second housing (42) which carries the inertia mass (43) and which comprises a protrusion (50) engaged in the orifice (43) of the first housing (36) and adapted to be immobilized in accordance with various angular positions in said orifice (41) so as to allow adjustment of the second housing in a horizontal position independently of the inclination of the axis of the mandrel (5), characterized in that the second housing (42) forms a conical recess (47) for receiving a ball (43) constituting said inertia mass, while said oscillating lever (44) has also a conical recess (48) covering the ball (43), and in that the second housing (42) comprises a stud (51) adapted to engage one of a series of holes (40) surrounding said orifice (41) so as to allow to have an standard acceleration detector (35) pre-adjusted in a non modifiable manner during assembly in the first housing (36) for occupying a determined angular position corresponding to the type of vehicle in which it is intended to be used.