Patent ID: 7013686

Claim:
A motorbike lock comprising: a cylindrical body having a hollow chamber in one side portion, a first shackle hole and a second shackle hole spaced apart on the same surface, and an insert hole in a wall near one end and communicating with said chamber; a cap closes an opening of the right end of the cylindrical body; two limit discs being positioned spaced apart in the chamber; a first spring positioned in said chamber of said cylindrical body; a retainer positioned in said chamber of said cylindrical body, having an opening in one end, a slot extending inward from said opening, a small cell formed in the other end, a sidewise hole communicating with said small cell, and a second spring and a pin fitted in said small cell, said pin having a projection and a groove at a side facing toward an opening of the insert hole; a core positioned in said chamber of said cylindrical body and having a rotary member; the rotary member axially extending from the core and being capable of inserting into the groove of the retainer; the core being positioned at a left side of the pin and the first spring being positioned at the right side of the pin; a press button positioned in one end of said retainer and having a center hole; a sleeve fitting around one end of said cylindrical body and having a center hole; and, a shackle of a U shape to be combined with said cylindrical body, having two ends respectively provided with a small rod-shaped end and a stopper respectively extending outward from said small rod; wherein in assembling, one of the limit discs is inserted in the chamber of the cylindrical body, with its circumference contacting the inner wall of the chamber, and then the first spring is inserted in the chamber; then the other limit disc is inserted in the chamber to contact with the spring; next, the other spring and the pin are placed in the sidewise hole of the retainer, and then the core is pushed in the small cell of the retainer, with the rotary member fitting in the groove of the pin, with the press button placed to contact the left end of the retainer; then the combined unit of the retainer with the press button is placed in the chamber of the cylindrical body, letting the projection fitting in the insert hole of the cylindrical body; then the sleeve and the cap are pressingly combined with the two ends of the cylindrical body, and the stoppers of the two ends of the shackle are respectively inserted in the two holes, finishing the assembly of this motorbike lock.