Device in connection with reel mechanisms for safety belts for automobiles

Activation means for a safety belt for a vehicle wherein there is provided a reel shaft for winding up said belt, a stop mechanism for the reel shaft having a wheel with ratchet teeth thereon rotatable together with said shaft and a pawl for cooperating with said ratchet teeth, and connecting means operably connecting said activation means with said pawl, said activation means comprising a supporting means, a body of inertia located in said supporting means, and an operating member for cooperation with said body of inertia constituting one unit, said body of inertia having a neutral position in said supporting means and being displaced from said neutral position in response to an abnormal change in movement of the vehicle to move said operating member and through said connecting means to actuate said pawl into engagement with one of said ratchet teeth, said activation means being located in a housing and being rotatable in said housing around a horizontal center axis of the supporting means, and a rotatable ring shaped plate is mounted coaxially with said reel shaft, said housing being supported by said plate for displacement about a circle having the same center as the reel shaft.