Patent ID: 6948345

Claim:
A lock enhancement arrangement of a lock assembly, comprising: a lock body having a lock channel defining an axial lock cavity and an axial reinforcing cavity communicating with said lock cavity; a lock unit, which is adapted for actuating a latch assembly, comprising a lock cylinder disposed in said lock cavity for a corresponding key to actuate said latch assembly and a pin seat radially extended from said lock cylinder at a position within said reinforcing cavity; and a retention member, having an axial retaining slot, securely supported within said reinforcing cavity, wherein said pin seat of said lock unit is substantially engaged with said retaining slot of said retention member to block an axial movement of said lock cylinder within said lock cavity so as to substantially retain said lock unit within said lock channel of said lock body, wherein said retention member has a non-circular shaped front blocking portion and a circular shaped rear holding portion having a size bigger than said blocking portion thereof to form at least two blocking walls to engage with said reinforcing cavity, wherein said reinforcing cavity has a front portion having a non-circular cross section matching with said blocking portion of said retention member, a rear portion having a circular cross section matching with said holding portion of said retention member, and at least two biasing walls which are formed between said front and rear portions of said reinforcing cavity and arranged in such a manner that when said retention member is fitted into said reinforcing cavity, said blocking portion and said holding portion of said retention member are slidably inserted into said front and rear portions of said reinforcing cavity respectively until said blocking walls of said retention member are blocked by said biasing walls of said reinforcing cavity respectively.