Patent ID: 7003994
Filing Date: 2006-02-28
Classification: E05B,Y10T

Abstract:
1. A lock enhancing device for a key lock which comprises a lock core having a cylindrical core body with a first retaining groove formed on a rear core end of said core body and a key receptacle formed therein and a lock sleeve having a core housing with a rear housing end of said core housing defining a core chamber for receiving said core body therein, wherein said lock enhancing device comprises: an axial movement stopper formed as a C-shaped ring having an inner stopper circumferential surface and outer stopper circumferential surface, said inner stopper circumferential surface and said outer stopper circumferential surface having a distance greater than the depth of said first retaining groove, and said inner stopper circumferential surface having a curvature substantially identical to that of said first retaining grove, wherein said axial movement stopper is capable of being disposed in relation with said core body and said core housing in such a manner that said inner stopper circumferential surface engages with said first retaining groove while said outer stopper circumferential surface presses against said rear housing end of said core housing in order to enhance structural resistance against an axial force for pulling said lock core out of said lock sleeve; and a structure-reinforcing element adapted for fittedly placing in a reinforcement receptacle formed at said rear core end of said core body to enclose said key receptacle at said rear core end, wherein said structure-reinforcing element is more inelastic than said core body so that said structure-reinforcing element is capable of resisting radial deformation of said rear core end of said core body as said axial force is applied to pull said lock core out of said lock sleeve.