Patent ID: 8139356

Claim:
A plunger-type security lock, comprising: a cylindrical sliding key receptacle with a slotted, first cylindrical portion and a second cylindrical portion; a locking member arranged on an outer cylindrical surface of the second cylindrical portion of the sliding key receptacle that is configured for securely attaching to a stationery object; a cylindrical plunger having a pushing end and a cylindrical plunger end, wherein the cylindrical plunger end is configured for insertion into the second cylindrical portion of the sliding key receptacle; a sliding key comprising a flat, longitudinal member constructed with a rectangular cross-section that includes a hooking end and a plunger-contact end, which sliding key is configured with a key definition and for slidable spring-loaded operation within the slotted, first cylindrical portion in cooperation with the cylindrical plunger in order to extend and hook a flexible locking strip and retract with and lock the locking strip in locking state; and a locking mechanism that defines the locking state in cooperation with the sliding key.