Winding-in device for vehicle safety belts

In a winding-in device for safety belts of motor vehicles, the device being of the type including a housing provided with a ring of teeth, a shaft having a flange, rotatably mounted in said housing for receiving a safety belt, a locking pawl pivotably mounted on said flange for engagement with said ring of teeth, an inertia body rotatable on and with said shaft, spring means for connecting said inertia body to said shaft, said inertia body, when a predetermined limiting level of acceleration of the shaft is exceeded, lags behind the rotary movement of said shaft in opposition to the effect of said spring means, so as to bring the locking pawl into engagement with said ring of teeth, the improvement which comprises, said inertia body having an actuating slot forming a cam track therein, and said locking pawl having first and second end regions connected by a web and being inset in said flange, the first end region being provided with a mounting head in the form of a part-disc, which disc is held against radial movement by a bearing space of a part-circular configuration forming part of a recess, said disc forming, in conjunction with said bearing space, a pivot mounting for connecting said locking pawl to said flange, one end of said bearing space continuing into a radial or substantially radial abutment face which forms a buttress for said locking pawl when the latter is in the locking position, said buttress being deformable under excessive loads, the second end region, which is opposite to said first end region, carrying an actuating pin, parallel to the axis of the device, which engages in said actuating slot in said inertia body, said actuating slot following a path along an arc of a circle eccentric to said inertia body.