Locking device for doors or windows

Abstract

A locking device for doors or windows comprising: a base member including an axially extended hole which has one end being formed as an oblong-shaped hole and the other end being formed with a round opening, the oblong-shaped hole having an axially extended inner wall; a locking shaft, from a front end of the locking shaft there are formed in sequence with a ball-shaped handle, a circular ring, an oblong-shaped locking block cooperating with the oblong-shaped hole, an elongated round rod, and a thread portion at an end of the round rod for connecting with a locking head which has a diameter greater than the round rod, wherein the locking block, round rod and locking head can be received in the oblong-shaped hole and the round opening; a spring mounting around the round rod, the spring having one end pushing on the inner wall of the oblong-shaped hole and the other end pushing on an inner surface of the locking head so as to keep the locking shaft at a pre-determined position relative to the base member. Therefore, the locking head can be received inside the round opening when the door/window is open such that the unexpected impact between the locking head and a shaft receiver may be prevented.

Dependencies are inferred from the claim text.