Door lock with swing-in crank-type bolt houses plastics roller in bolt niche at free end of crank arm proud of faceplate when swung into slot.

摘要

The free end of the crank arm (18) projecting beyond the faceplate (2) is allocated a roller (R,23) whose surface projects beyond the endface (13) of the bolt head (9) when the arm (18) is swung into the slot (15). The roller axis (24) runs parallel to the faceplate (2) and the roller (23) as such lies in a niche (22) in the arm (18). The bearing cheeks offered by the niche (22) lie on the slot walls (15) when the crank arm is swung into the slot and the roller diameter is half the thickness of the bolt head.