EP2947240B1 - Lock - Google Patents

Description

Technical area

The invention relates to a lock according to the preamble of claim 1.

State of the art

In such locks, as for example from the DE 102004037915 A are known, the bolt is blocked in its retracted position by a trigger element against the case. When closing a door triggers the latch and this can be postponed over the path of movement of the case and the lock is thereby automatically locked. When retracting the bolt and the latch both parts must have a sufficient distance from each other so that the trigger element can lock the bolt back in the retracted position. In practice, there is the problem that when common retraction of bolt and latch this necessary distance is not always achieved independently, so that the lock would not be securely blocked in the unlocked position. To avoid this, a second spring was provided in the above known solution, which acts on the case and the retraction of the bolt pushes back the case in the pushed-out position, so that the defined distance between the latch and bolt is achieved. However, this has the disadvantage that relatively high forces for actuating the lock, or for retracting the latch and the latch are required, since the latch and bolt against the respective springs must be pressed and thus over the entire

Retraction path, the torque on the lock cylinder or pusher increases.

Brief description of the invention

The aim of the invention is to avoid this disadvantage and to propose a lock of the type mentioned, in which only relatively small forces for retracting the latch and the bolt are required, however, a secure engagement of the trigger element is ensured. At the same time the lock should be as simple as possible, whereby the production costs are kept low.

According to the invention this is achieved in a lock of the type mentioned by the characterizing features of claim 1.

Since in the lock according to the invention only a common spring for biasing the bolt and the latch is provided, the required restoring forces for retracting the latch and the bolt are significantly lower. To ensure that the bolt retracts the correct distance between the rear end faces of the latch and the bolt seen in the extension direction, a spring-loaded stopper acts on the latch only in the last section, essentially the last 2-3 mm of the return path one. In this way it is achieved that, should the trap be taken by friction and not only by the Mitnehmerkoppelglied when pulling back the bolt, the correct mutual position of the latch and bolt is ensured by the resilient stop. This results in only in the last portion of the return path of the case and the bolt in addition to be overcome force by the spring of the stopper and thus an increase in torque. However, this increase is significantly lower than in the prior art due to the very short section, where this increase increases over the entire retraction path.

Furthermore, the features of claim 2 may be provided. These measures result in a very simple construction for the coupling member.

The features of claim 3 provide a particularly favorable construction of the trigger and the features of claim 4 provide a particularly favorable construction of the supported stop, which is ensured in a very simple manner, a secure blocking of the prestressed bolt in its retracted position with respect to the case.

Short description of the drawing figures

• Fig. 1 schematisch ein erfindungsgemäßes Schloss mit abgehobenem Gehäusedeckel und zurückgezogener Falle,
• Fig. 2 eine Ansicht des Schlosses nach der Fig. 1 mit ausgeschobener Falle und zurückgezogenem Riegel,
• Fig. 3 eine Teilansicht des Schlosses nach Fig. 1 und 2 mit ausgeschobener Falle und ausgeschobenem Riegel,
• Fig. 4 einen Anschlag für die Falle im Detail und
• Fig. 5 eine Ansicht des Gehäuses des Schlosses nur mit angeordnetem Anschlag.

The invention will now be explained in more detail with reference to the drawing. Showing:

• Fig. 1 schematically a lock according to the invention with lifted housing cover and retracted trap,
• Fig. 2 a view of the castle after the Fig. 1 with retracted trap and retracted latch,
• Fig. 3 a partial view of the castle after Fig. 1 and 2 with retracted trap and pushed out bar,
• Fig. 4 a stop for the trap in detail and
• Fig. 5 a view of the housing of the castle only with arranged stop.

Description of the embodiments

In a housing 1, a push rod 2 is slidably supported, which is actuated by means of a pusher or a lock cylinder. This cooperates with a pivotally held in the housing 1 retraction lever 3, said parts in Fig. 1 are shown in their retracted case 4 corresponding position. In this case, an arm of the retraction lever 3 engages a projection 9 of a bolt 5, which is held displaceably in the case 4.

In the case 4 a movable in the direction of movement of the latch 4 latch 5 is held, wherein a Ausschubfeder 6 acts on this.

The case 4 further has a trigger 20 which protrudes laterally from the tightening surface on the tightening surface cooperating with a striking plate and, when closing a door with a lock according to the invention, first strikes a striking plate and is pressed into the trap 4 by the latter. This trigger 20 is pivotable about a perpendicular to the direction of movement of the case 4 held in this axis 22 and is designed as a two-armed lever. The trigger 20 is biased in its rest position with protruding from the attraction surface first lever arm by a spring.

In this position, the free end of the second lever arm 7 abuts a projection 8 of the bolt 5 and blocks it. This results in a mutual position of the case 4 and the bolt 5, in which the latter does not protrude beyond the case 4 with its front end in the extension direction.

The bolt 5 further comprises a pin 10 which engages in a bore of a leaf spring 11 which lies in a recess of the bolt 5 and the Retracting the bolt 5 to take the case 4 by the bolt 5 is used.

The Ausschiebeweg the case 4 is limited in the usual way by a biased by a spring 12 against its working position slider 13 which cooperates with a stop surface of the trap 4, the e.g. is formed by the end of a groove arranged at the top of the case 4.

Furthermore, in the housing 1 a stop having a small spring travel 14 is held, which projects into the path of movement of the case 4. This supported by a spring 15 on the housing 1 stop 14 ensures that upon retraction of the bolt 5, the correct mutual position of the case 4 and 5 bar on reaching the retracted end position of the bolt 5 results and the trigger 20 with the free end of its lever arm 7 can be urged into a bolt 5 blocking position. Out Fig. 2 It can be seen that the stop 14 protrudes with a projection 16 in the path of movement of the case 4 and in the housing 1 guide ribs 17 are arranged for the stop 14, which, as shown in Fig. 4 can be seen, two grooves 18, in which the guide ribs 17 engage.

The leaf spring 11, which lies in a recess of the bolt 5, has a raised edge 19. The upstand 19 engages behind an opposite edge 21 of the case 4. By the upstand 19 of the leaf spring 11 and the edge 21, the case 4 is taken when retracting the bolt on the leaf spring 11 ( Fig. 1 ).

If trap 4 is in its normal position, Fig. 2 ), in which it protrudes from the housing 1, to a strike plate, the trigger 20, which projects with its one lever arm from the attraction surface of the case 4, pushed back in the cross section of the case 4, whereby its lever arm 7 out of engagement with the projection 8 of the bolt 5 comes and this is pushed by the Ausschubfeder 6 on the free end of the case 4 addition ( Fig. 3 ).

When retracting the bolt 5 by the retraction lever 3 is first withdrawn against the force of the Ausschubfeder 6, the bolt 5. It may also happen that the case 4 with sufficient

Frictional connection is taken. If this is not sufficient, then the entrainment of the catch 4 is in any case effected by the raised edge 19 of the leaf spring 11, which comes into contact with the edge 21 of the catch 4. It must be overcome for the withdrawal movement, only the force of the Ausschubfeder 6.

Reached the case 4 the resilient stop 14, the case 4 can be moved only after overcoming even the additional force of the spring 15 of the stopper 14 in the rearmost end position ( Fig. 1 ). This ensures that a possible frictional connection between bolt 5 and case 4 is not sufficient to cause further entrainment of the case 4, whereby a correct mutual position of the case 4 and the bolt 5 is achieved and the lever arm 7 of the trigger 20 to rest against the Tab 8 of the bolt 5 comes.

The Fig. 5 shows for clarity a blank lock housing 1, in which only the slider 13, which is the outer end stop of the case, as well as the stop 14 are inserted. In this illustration, it can be clearly seen how the projection 16 projects into the free space in which the trap is normally moved. The stop 16 is slidably mounted on two guide ribs 17, wherein the movement path is limited by end stops in the housing 1. Since the stop 14 comes only about 2-3 mm before the rear end of the path of movement of the case 4 with its projection 16 at this plant, the force of the spring 15 acts only from this time in addition to the force of the Ausschubfeder 6, creating only more slight increase in torque takes place on the lock cylinder or pusher.

Claims (4)

1. A lock having a latch (4) and a bolt (5) which are jointly pre-tensioned with a push-out spring (6) in their push-out direction, wherein the bolt (5) is substantially held within the cross-section of the latch (4) lying transversely to the direction of movement and can be pushed out beyond the pushed-out position of the latch (4), wherein a trip (20) is provided that is mounted on the latch (4) and is pre-tensioned against its position of rest and which in the position of rest projects laterally over a draw-in face of the latch (4) and bolts the bolt (5) in its position where it is drawn back in relation to the latch (4), wherein the trip (20) cooperates with a closing plate to release the bolt (5) and in the event of actuation releases the pre-tensioned bolt (5), and wherein the bolt (5) can be drawn back by way of a restoring lever (3), and the latch (4) can be drawn back by way of an entraining-coupling element (11) that is arranged on the bolt (5), and in that a stop (14) is provided that projects into the path of movement of the latch (4) and is stayed by means of a staying spring (15), wherein the stop (14) only projects into the rear end section of the path of movement of the latch (4) just before its drawn-back end position is reached.
2. A lock according to claim 1, characterised in that the entraining-coupling element (11) is laid in a depression of the bolt (5) and is formed as a leaf spring (11) which at its end engages, with an upturn (19), behind an edge (21) of the latch (4) and is used to entrain the same when drawing back the bolt (5), wherein the leaf spring (11) is held in the bolt (5).
3. A lock according to claim 1 or 2, characterised in that the trip (20) is formed by a double lever arm which is held so that it can be swung about a shaft (22), held in the latch (4) and standing perpendicularly to the direction of movement of the latch, and the lever arm (7) of which that is remote from the latch head cooperates, with its free end region, with an extension (8) of the bolt (5) and blocks the bolt (5) in its drawn-back position.
4. A lock according to one of claims 1 to 3, characterised in that the stayed stop (14) is mounted in the housing on guide ribs (17) in such a way that it can be moved parallel to the direction of movement of the latch (4) and is pre-tensioned against its pushed-out position by means of the staying spring (15), and in that the path of movement of the stop (14) is limited by respective end stops arranged on the housing.

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