Door Lock with Idle Travel in a Locking State

• Main Author: SHEN CHUN-MENG
• Format: Patent
• Language: English
• Published: 03.01.2013
• Subjects: ACCESSORIES THEREFOR; BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS ORWINDOWS; FIXED CONSTRUCTIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HANDCUFFS; KEYS; LOCKS; SAFES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; WINDOW OR DOOR FITTINGS

A door lock (2) includes a linking rod (730) movable in an unlatching direction for moving a latch (38) to an unlatching position and movable in a latching direction for moving the latch (38) to a latching position. When a draw bar (640) is in an extended position and when an operative member (688) is operated, a follower plate (482) and the connecting rod (730) are moved in the unlatching direction through a connecting member (498) and a connecting rod (512). When the draw bar (640) is in a retracted position and when the operative member (688) is operated, the connecting member (498) and the connecting rod (512) are moved in the unlatching direction. Movement of the follower plate (482) in the unlatching direction is stopped by a stop member (668), preventing movement of the linking rod (730) in the unlatching direction and retaining the latch (38) in the latching position.