Central locking device for automobile doors

An actuator, especially for locking and unlocking vehicle doors from a central location, said actuator comprising:

• a housing;
• a reversible electric motor mounted in said housing and having an output;
• a transmission arranged in said housing and operatively connectable to said output of said reversible electric motor;
• an output member driven by said transmission, said output member being adapted to selectively assume a lock position, an unlock position, and an antitheft position, in conformity with the input from said reversible motor, said output member comprising an actuating rod formed by two arms extending in spaced relation with respect to one another with each arm having at least one projecting formation of resilient elastic material, whereby said formations extend in opposed relation with respect to one another, said arms being joined at the respective ends thereof to form a traverse stop;
• a spindle between said arms, said spindle having an end formed with an effective length of a helical screw with a screw-thread which is substantially self-locking and precluding unintentional movement;
• and
• a spindle-nut movably mounted on said spindle on said screw-thread, said spindle-nut having ridges which are dimensioned and positioned to carry along said actuating rod during the lock stroke and during the unlock stroke thereof by engaging said projecting formations of said actuating rod, and being adapted to carry out an antitheft stroke as well as being capable of, upon completion of a respective lock stroke and upon completion of a respective unlock stroke and, for carrying out a respective antitheft stroke, overriding said projecting formation of said at least two arms.

In an electrical central locking device for a door of a vehicle having an actuating rod mounted for vertical reciprocating movement with an unlocked position, a locked position, and an antitheft position, and adapted to operate a control rod of an associated door lock, said device including:

• a reversible electric motor,
• a transmission, and
• an actuating mechanism for the actuating rod, which is equipped with an actuator as well as coupling noses and coupling counternoses which are adapted to carry along the actuating rod during a respective lock stroke and during a respective unlock stroke, and wherein upon completion of the respective lock stroke, as well as upon completion of the respective unlock stroke, and for effecting a respective antitheft stroke, the coupling counternoses are overridden by said coupling noses,
• the improvement which comprises:
• a spindle operatively connectable to said transmission, and positioned substantially parallel with respect to said actuating rod, said spindle having at least one end formed with a self-retarding thread;
• and
• a spindle-nut guide on said spindle, said spindle-nut on at least two sides being provided with projecting formations;
• and two arms formed on said rod and extending on opposite sides of said spindle, with each arm carrying at least one coupling counternose of resilient elastic material, said two arms being joined in the form of a base to allow seating thereon of said spindle-nut at the completion of an antitheft stroke.