U-shaped lock

摘要

A U-shaped lock is provided which includes a straight tubular housing, a locking unit disposed within the housing, and a U-shaped shackle. The U-shaped shackle has one end provided with a bend stopper to fit in a shackle hole of the housing and the other end provided with a notch for receiving a flat rectangular portion of a dead bolt to lockingly engage or disengage the shackle. The locking unit includes a cylindrical member combined and rotating together with a lock cylinder. The lock cylinder has a key hole for insertion of a key for rotating the lock cylinder and a projecting block extending from a rear end of the lock cylinder and engaged in a hole of the cylindrical member. The dead bolt is moved forward or backward responsive to rotation of the key in the lock cylinder to cause the flat rectangular portion of the dead bolt to engage or disengage from the notch of the shackle.