Pushing device for the emerging of the bolt in locks

A pushing device for the emerging of the bolt in locks, for locks which comprise, at least:

• a handle axis (1) which, with a radial arm (1a), retracts a slide (2) in the rotational opening maneuver, a bolt (3), a connecting rod (4) which drives the retraction of the bolt (3) in said opening maneuver, a bolt tail (5), several trapping notches (5a) cut into the upper side of this bolt tail (5), a latch plate (6) vertically sliding, a latch (6a) belonging to the latch plate (6), a spring (7) which drives the latch plate (6) into a lower position, in which the latch (6a) is lodged in one of the trapping notches (5a), and which allows an upper position for this latch plate (6) in which this latch (6a) is released from these trapping notches (5a), characterized in that said handle axis (1) has a lever (8) coaxial with it, being rotationally coupled to same in that it turns along with it in the conventional opening direction, but it has an independent turning in the opposite direction, or anti-opening turn, which lever (8) has a peripheral lug (8a) which is applied, in relation to said anti-opening turn, against a fin (9a) of a rocker (9) which is mounted spring-loaded and which has a projection (9b) which is applied against a heel (10a) belonging to a counter-rocker (10), having a front end (10b) which is applied upward from below against a transverse lug (6b) of said latch plate (6), there being a rotary rod (11) which is mounted with free turning coaxially with said rocker (9) and is equipped with certain arms, one for the rocker (11a) and one for the bolt (11b), which are rotationally spaced by an angle preferably less than that necessary for simultaneous and respective contact with the fin (9a) of the rocker (9) in the state of rest and with the back of the bolt (3) in the retracted condition, and this rotational angular difference is preserved in the state of rest between said fin (9a) and said rocker arm (11a) with an amplitude which is preferably a function of the vertical run between the coupled and uncoupled positions of the latch (6a) in the trapping notches (5a).