Fixed-leaf lock mechanism

An espagnolette with a lock mechanism (1) for a fixed leaf of a double-leaf door, and having a lock case (5) in which there is mounted a handle follower (9) by rotational actuation of which at least one driving-rod connection slide (20, 26) is displaceable parallel to a lock case front (6), an end of the rod connection slide forming or controlling a bolt, the espagnolette having an entry opening (7, 8) for a bolt (4) or a latch (3) of a lock mechanism (2) associated with a moving leaf, the driving-rod connection slide (20, 26) being guided in the lock case (5) and being assigned a blocking element (28, 29) which, in an open position of the lock mechanism (1), is located in a region of the entry opening (7, 8), in order to obstruct entry of the bolt (4) of the moving-leaf lock mechanism (2), and, in a locked position of the lock mechanism (1), is located outside the region of the entry opening (8) such that displaceability of the driving-rod connection slide (26) into the open position is blockable by entry of the bolt (4) of the moving-leaf lock mechanism, wherein the follower (9) acts on the driving-rod connection slide (26) by a lever-transmission mechanism (H), a link (11) which acts, at one end, on a driving-rod drive lever (13) and, at an other end, on an arm (10) of the handle follower (9) being brought over a dead-center position (T) when the follower (9) is rotated;

• and wherein there is play for movement between the handle follower (9) and follower arm (10) such that the handle follower (9) is kept in a neutral center position by a spring element (38) irrespectively of displacement position of driving-rod connection slide (lever) (26).