Lock furnished with a replaceable lock core
OwnerChung-I Hunginventor
Life of this patent
Estimating the term…
Abstract
A lock furnished with a replaceable lock core, in which the inner lock assembly includes a lock core, a sleeve, and a control ring; the inner lock assembly is mounted in a fixed lock casing; the inner lock assembly and the lock casing are assembled together by means of a catch pin; the key normally used for unlocking the lock can only be turned clockwise without hindering the catching function between he inner lock assembly and the lock casing; when an inner lock assembly is replaced, the key should be inserted for unlocking, and then turned counter-clockwise so as to release the catching function between the lock casing and the inner lock assembly; then, pull the key outwards so as to pull out the inner lock assembly simultaneously, and the replacement of a new lock core for the lock casing is done simply.
Claims7
A lock furnished with a replaceable lock core, comprising:
- a lock casing furnished with a cylindrical hole for mounting an inner lock assembly, and said lock casing also furnished with a catch slot so as to have said lock casing and said inner lock assembly engaged together;
- an inner lock assembly including:
- a sleeve being a cylindrical member, and furnished with a limit slot for receiving a catch pin, and center thereof furnished with a cylindrical hole for mounting a control ring and a lock core;
- a control ring mounted in said cylindrical hole of said sleeve;
- inner surface of said control ring furnished with a guide slot, of which one side furnished with a deeper control cylindrical surface, while other side thereof furnished with a shallow control cylindrical surface;
- a lock core, including an upper tumbler base, a lower tumbler base, a plurality of front tumblers, of rear tumblers and of springs;
- one side of said lower tumbler base furnished with a cylindrical hole for receiving a catch pin and a spring;
- a transmission shaft of said lower tumbler base furnished with a cut slot which is beside said cylindrical hole for mounting a catch pin;
- a key having a cylinder-shaped stem, and front end thereof furnished with a plurality of key slots, and front end of a key plate furnished with a positioning block having different length.
Dependencies are inferred from the claim text.