Patent ID: 8683832

Claim:
A push button lock comprising: a housing on which a plurality of depressible push buttons are located; lock pins for setting and changing a security code, and which are engageable with the push buttons and movable coaxially with the push buttons; a lock plate formed with both plate key holes into which the lock pins are insertable and plate lock holes with which the lock pins engage, the plate lock holes comprising portions of the plate key holes; a reset plate arranged in parallel with the lock plate and provided inside with reset springs, the reset springs maintaining or releasing axial displacement of the lock pins; a driving cam which is rotatable and engageable with a lower end of the lock plate; a deadbolt lock linked to the driving cam; whereby upon depression of the push buttons the lock pins control a movement of the lock plate and cause the lock plate and the driving cam to be disengageable relative to one another; and a security-code controller for setting storing, releasing, and changing the security code entered via the push buttons that comprises a controller case and a controller cover, the lock plate and the reset plate being slidably arranged in parallel and adjacent to each other between the controller case and the controller cover, the lock pins being mounted on the security-code controller, the security-code controller being removably attached inside the housing.