HEAD FIXING LOCK FOR BICYCLE HAVING EXCESSIVE LOAD AVOIDANCE COUPLING LOCKING BODY

PROBLEM TO BE SOLVED: To provide a head fixing lock for bicycle having an excessive load avoidance coupling locking body. SOLUTION: The head fixing lock for the bicycle having the excessive load avoidance coupling locking body, the excessive load avoidance coupling locking body is divided into an inside diameter body which is fixed and connected to a member with an inside diameter face being integrally connected and fixed to handle bars such as a front fork stem, and an outside diameter body with a projecting tooth or a recess being circumferentially provided on the outer circumferential surface, and a rotating resistance body of the required torque is interposed between the outer circumferential surface of the inside diameter body and the inside diameter face of the outside diameter body. The locking body is integrally arranged with the handle bars. The projecting tooth or the recess on the outer circumference corresponding to a lock pin arranged at the predetermined position on the frame side is engaged therewith. The inside diameter body is rotated against the excessive load not less than the predetermined torque from the handle bars, and the excessive load applied to the inside diameter body, the outside diameter body and the lock pin is avoided. COPYRIGHT: (C)2006,JPO&NCIPI