Patent ID: 7293439

Claim:
A combination padlock comprising: a housing having a top; a bottom; a cavity defined in the housing and having an inner surface; a bottom hole defined in the bottom and communicating with the cavity; a top hole defined in the top and communicating with the cavity; multiple windows defined through the housing, communicating with the cavity and arranged in a row; and a locking hole defined in the top and communicating with the cavity; a dial core mounted in the cavity and having multiple dials being annular, mounted rotatably in the cavity, corresponding respectively to and partially exposed respectively out of the windows and each dial having an outer edge, a central hole defined through the dial and multiple numerals mounted on the outer edge; and a shaft mounted in the cavity, aligned with the locking hole, extending through the central holes in the dials, selectively sliding upward and having a bottom end; a connector mounted slidably in the cavity, selectively pressing the shaft to slide upward and having a cylinder mounted slidably in the cavity and having a top edge, a through hole defined longitudinally through the cylinder and aligned with the top hole and the bottom hole in the housing and an open slot defined longitudinally in the top edge and communicating with the through hole; and a lateral arm formed on and protruding transversely from the cylinder and abutting the bottom end of the shaft; a key core mounted rotatably in the through hole in the cylinder and having a top end; a bottom end; a mounting hole defined in the top end and aligned with the top hole in the housing; a rail slot defined spirally and radially in the key core, communicating with the mounting hole and having a lower inside end and an upper inside end; and a slide pin mounted through the open slot in the cylinder, mounted slidably in the rail slot in the key core and having an outside end and an inside end; and a shackle being U-shaped, mounted in the cavity in the housing and having a mounting end mounted rotatably and slidably in the mounting hole in the key core; a locking end engaging selectively with the locking hole; and an annular recess defined radially in the shackle adjacent to the mounting end and receiving and holding the inside end of the slide pin.