US Patent 7198306 Spring-biased locking bolt

A spring-biased locking bolt with an operating button and a bolt connected with the operating button is described, wherein the bolt is spring-biased and movable in a sleeve. The sleeve is screwed into a corresponding opening in a machine part or an item of furniture, wherein the bolt can engage in the opening. The locking bolt has an optional catch that fixes the pulled-out bolt in its raised position. A sleeve section oriented in an axial direction is formed on the operating button, wherein the longitudinally movable and spring-biased sleeve engages with its polygonal shoulder with the polygonal opening.