Side door striker and method of operation

A striker assembly for latching and unlatching a side door of a motor vehicle, said striker assembly comprising:

• a mounting plate adapted to be fixedly secured to the motor vehicle;
• a striker slidably coupled to said mounting plate and moveable relative to said mounting plate between an inboard position for latching of the side door and an outboard position for unlatching of the side door;
• a drive mechanism slidably coupled between said mounting plate and said striker for selectively engaging said striker and moving said striker from said outboard position to said inboard position;
• a motor supported by said mounting plate and operatively coupled to said drive mechanism, whereby energizing said motor in a first sense drives said drive mechanism against said striker to move said striker to said inboard position and energizing said motor in a second opposite sense moves said drive mechanism away from said striker;
• a spring compressed between said striker and said mounting plate for biasing said striker towards said outboard position whereby said spring allows independent relative movement between said striker and said drive mechanism to absorb impact energy from the side door contacting said striker in said outboard position;
• said drive mechanism including a carriage slidably coupled to said mounting plate and said striker for lateral movement along said mounting plate independent of said striker between said inboard and outboard positions a lead screw rotatably coupled between said carriage and said mounting plate for guiding said carriage between said inboard and outboard positions, and a follower rotatably coupled to said carriage and threaded to said lead screw, said follower operatively engaged with said motor for transferring rotational force generated by said motor into axial movement alone said lead screw to drive said carriage between said inboard and outboard positions.