SELF-LOCK MODULE

摘要

Disclosed are apparatus and corresponding methodology for the attachment of a self-contained module to any mechanical lock having a mating feature to accept it (in either of an OEM application or as a retrofit). The module enables a separate (preexisting) cam locking feature (components) to be associated with an existing mechanical lock by being fitted onto the back of the existing lock and then having the cam locking components attached to the module. In turn, the preexisting cam locking components may be fitted to the module aligned in any one of four positions (up, down, left, and right) on the back of the module for latching in any position in which the associated lock/cam strike may be installed. The cam locking components then function to allow a user to open an associated door or drawer, and when finished, slam it shut without having to rotate the lock back to a locked position. The self-contained module allows the cam locking components to be fitted to a standard, mechanical lock and still have the self-lock feature that is otherwise not available within the existing lock.

主权项

1. A self-contained module for interfacing with a preexisting lock rotatable by a user from a locked to an unlocked position thereof, for providing a self-locking function to such preexisting lock, said module comprising:
an outer housing; a rotatable inner axle received within said outer housing, and having an engagement feature for interfacing with a preexisting lock so that said inner axle and the preexisting lock are rotationally locked to one another; and a torsion spring situated between and associated with said outer housing and said inner axle so that rotation of said inner axle within said outer housing by rotation of the preexisting lock by a user to an unlocked position thereof causes storage of torsional energy in said spring, which torsional energy causes the preexisting lock to automatically return to a locked position thereof whenever released by a user of the preexisting lock.