EP3122964B1 - Lock for a door or window - Google Patents

Description

The invention relates to a lock for a door or a window according to the preamble of claim 1.

From the DE 199 05 596 C2 such a lock is known. This document describes a self-locking lock in which the bolt automatically extends into its pre-closed locking position as soon as the sash rests on the door frame in its closed position. The lock has a lock latch with an inlet slope and a bolt. A control latch is also provided which controls the self-locking mechanism, ie the automatic pre-locking of the bolt. The lock has a blocking member which interacts indirectly with the bolt and which holds the bolt in its closed position and which in the closed position of the door leaf enables the bolt to move into its pre-locked position. There is also a control member that can be displaced depending on the position of the control latch. The mechanics are complex: the blocking element is mounted in the lock case so that it can pivot and move. The control element is in turn linear on this movably mounted blocking element movably mounted. The control member also has a cam which, when the latch is displaced back and when the bolt is actuated, lies in the path of movement of the latch that is displacing again.

The invention is based on the object of creating a lock which has the same functionality as the lock known from the prior art, the mechanism for self-locking, however, being of a simpler construction compared to the prior art.

• einen beweglich im Schlosskasten gelagerten Riegel, der in eine rückgeschlossene Stellung, in der der Riegel im Schlosskasten aufgenommen ist, und in eine vorgeschlossene Stellung, in der der Riegel abschnittsweise aus dem Schlosskasten hervorragt, verlagerbar ist, wobei der Riegel durch eine Feder in Richtung seiner vorgeschlossenen Stellung beaufschlagt ist,
• eine beweglich im Schlosskasten gelagerten Falle, die einen Fallenkopf mit einer Einlaufschräge und einen Fallenschaft aufweist, wobei die Falle in eine rückgeschlossene Stellung, in der die Falle im Schlosskasten aufgenommen ist, und in eine vorgeschlossene Stellung, in der der Fallenkopf aus dem Schlosskasten hervorragt, verlagerbar ist
• eine Steuerfalle, die in eine rückgeschlossene Stellung, in der die Steuerfalle im Schlosskasten aufgenommen ist, und in eine vorgeschlossene Stellung, in der die Steuerfalle abschnittsweise aus dem Schlosskasten hervorragt, verlagerbar ist,
• ein beweglich im Schlosskasten gelagertes Blockierglied, das unmittelbar oder mittelbar mit dem Riegel zusammenwirkt und das in eine den Riegel blockierende Stellung verlagerbar ist, in der das Blockierglied den Riegel in seiner rückgeschlossenen Stellung hält, und in eine den Riegel nicht-blockierende Stellung verlagerbar ist, in der das Blockierglied die Bewegung des Riegels von seiner rückgeschlossenen Stellung in seine vorgeschlossene Stellung freigibt,
• ein beweglich im Schlosskasten gelagertes Steuerglied, das abhängig von der Steuerfalle verlagerbar ist.

According to the invention, this object is achieved with the subject matter of claim 1. A self-locking lock for a door or a window with a movably mounted sash with a lock mechanism mounted in a lock case is proposed, the lock mechanism comprising:

• a bolt movably mounted in the lock case, which can be displaced into a closed position in which the bolt is received in the lock case, and into a pre-locked position in which the bolt protrudes in sections from the lock case, the bolt being moved in the direction of its by a spring pre-locked position is applied,
• a movably mounted latch in the lock case, which has a latch head with an inlet bevel and a latch shaft, the latch in a closed position in which the latch is received in the lock case and in a pre-closed position in which the latch head protrudes from the lock case, is relocatable
• a control latch that can be moved into a closed position in which the control latch is accommodated in the lock case, and into a pre-closed position in which the control latch protrudes from the lock case in sections,
• a blocking member movably mounted in the lock case, which interacts directly or indirectly with the bolt and which can be displaced into a position that blocks the bolt, in which the blocking member holds the bolt in its closed position, and can be displaced into a position that does not block the bolt, in which the blocking member releases the bolt from its closed position to its pre-closed position,
• a movable control member mounted in the lock case, which can be moved depending on the control latch.

It is essential in the present invention that the control member interacts with the blocking member in such a way that the blocking member can be coupled to the latch depending on the position of the control member.

In the present invention it is further essential that the latch cooperates with the blocking member in such a way that the blocking member is taken along from its position which can be coupled to the latch by extending the latch from its position blocking the bolt to its non-blocking position.

If the wing is moved in the direction of its closed position, both the latch and the control latch are moved back into the lock case by contact with the door frame. Because the control trap is shifted back, the control element is also shifted. When the latch is closed and the control member is displaced by the closed control latch, a possible coupling between the latch and the blocking member is then released. When the trap extends into its pre-locked position, with the control trap closed at the same time, the trap comes into coupling engagement with the Blocking element. The movably mounted blocking member is taken along by the trap due to the coupling with the trap. The blocking member is thus moved into its non-blocking position by the locking latch. The bolt then closes in its pre-locked, locking position. Preferably, the latch and the blocking element are designed in such a way that the displacement of the blocking member into its non-blocking position does not occur until after the latch is completely pre-closed.

It is also essential in the present invention that the blocking member, in its position that can be coupled to the latch, forms and / or has a driver stop for cooperation with the latch or with a part connected to the latch.

It is also essential in the present invention that the part connected to the latch, which interacts with the driver stop, is designed as a release member movably mounted on the latch, which can be brought into contact with the driver stop of the blocking member in the couplable position of the blocking member . The trigger member is preferably mounted on the latch tail. When the latch is displaced back and the control latch is simultaneously displaced back, the release element preferably projects in the manner of a cantilever from the latch tail in the direction of the blocking element. In such preferred embodiments, the protruding release element comes into engagement with the blocking element when the case closes, so that the blocking element is displaced.

It can be provided that the release element is acted upon by a spring arranged on the latch in the direction of the blocking element. This can be a leaf spring. There are also versions possible in which the release element is acted upon by a helical compression spring or by a torsion spring.

It can be provided that the release member is designed as a one-armed lever which is pivotably mounted on the latch and which has a section at its lever arm end for engaging and / or for resting on the driver stop of the blocking member. In such designs, the latch tail preferably has a bearing for mounting the release element. However, designs are also possible in which the release element is mounted on the latch such that it can be moved linearly.

It can be provided that the blocking member and the control member are movably mounted so that they overlap one another in a variable manner, forming a first relative position and a second relative position, so that the blocking member is in a partial section as a driver stop for interacting with the latch or with a part connected to the latch is formed, and that in the first relative position the control member overlaps with the section of the blocking member designed as a driver stop and in the second relative position the control member does not overlap the section of the blocking member designed as a driver stop. In such preferred embodiments, the blocking member and the control member are each designed as plate-shaped components. The plate-shaped blocking member and the plate-shaped control member can touch each other flat.

It can be provided that the blocking member and the control member are mounted so that they can slide relative to one another. In preferred embodiments, the blocking member and the control member can each other have associated sliding surfaces on which they slide the blocking member and the control member on one another.

It can be provided that the blocking element is designed as a blocking lever and the control element is designed as a control lever, and that the blocking lever and the control lever are pivotably mounted about a common axis of rotation with the formation of variable overlapping positions.

It can be provided that the blocking lever is designed as a two-armed lever which has a first lever arm which interacts with the bolt in the position blocking the bolt, and which has a second lever arm which, in the coupling position of the blocking member with the latch or cooperates with the part connected to the trap.

It can be provided that the control lever is designed as a two-armed lever which has a first lever arm which cooperates with the auxiliary latch and which has a second lever arm which cooperates with the blocking lever to form variable overlapping positions.

It can be provided that the lock has a nut and / or a lock cylinder for moving the bolt from its pre-locked position to its closed position.

It can be provided that the lock has an actuating lever which interacts with the nut and / or with the lock cylinder and which interacts with the bolt for actuation.

It can be provided that the blocking member, in its position blocking the bolt, interacts with the bolt via the actuating lever.

It can be provided that the actuating lever has a blocking edge and the blocking member has a projection, the blocking edge of the actuating lever resting against the projection of the blocking member in the position of the blocking member blocking the bolt.

It can be provided that the actuating lever and bolt are connected via a link device, the actuating lever having a link pin which engages in a link slot on the bolt or the actuating lever has a link slot in which a link pin formed on the latch engages.

Fig. 1

eine Seitenansicht des Schlosses bei geöffnetem Türflügel;

Fig. 2

eine Seitenansicht des Schlosses beim Anschlagen des Türflügels an den Türrahmen;

Fig. 3

eine Seitenansicht des Schlosses in der Schließlage des Türflügels an den Türrahmen mit vorgeschlossener Falle und vorschließendem Riegel;

Fig. 4

eine Seitenansicht des Schlosses in der Schließlage des Türflügels an den Türrahmen mit vorgeschlossener Falle und vorgeschlossenem Riegel.

The invention will now be explained in more detail on the basis of exemplary embodiments. Show it

Fig. 1

a side view of the lock with the door leaf open;

Fig. 2

a side view of the lock when the door leaf hits the door frame;

Fig. 3

a side view of the lock in the closed position of the door leaf on the door frame with a pre-locked latch and pre-locking bolt;

Fig. 4

a side view of the lock in the closed position of the door leaf on the door frame with a pre-locked latch and a pre-locked bolt.

The Figs. 1 to 4 show a lock 1 for a door or a window with a movably mounted sash. The lock mechanism has a bolt 5a, a latch 5b, and a control latch 5c. The lock can be a mortise lock in which the lock mechanism is mounted in a lock case 1k, not shown in detail in the figures, which is mounted in a receiving pocket in the wing of the door or window.

The bolt 5a is designed as a swivel bolt which is now pivotably mounted on an axis 5aa in the lock case 1k. As in the Figures 1 , 2 shown, the bolt 5a can assume a closed position in which the bolt 5a is received retracted in the lock case 1k. As in Figure 4 As shown, the bolt 5a can assume a pre-locked position in which a portion of the bolt 5a protrudes from an associated opening on the faceplate of the lock case 1k and engages in a receptacle in a frame-side strike plate or in a receptacle in a passive wing lock mounted on the frame side. The frame-side strike plate or the passive leaf lock is not shown in more detail in the figures. However, the faceplate 1b can be seen with the faceplate-side openings, which are each assigned to the components of the lock mechanism, namely the lock latch 5b, the bolt 5a and the auxiliary latch 5c, and which can be reached through by these components. A spring, not shown, is provided which acts on the bolt 5a in the direction of its pre-locked position.

The latch 5b is linearly moveable in the lock case. The latch 5b has a latch head 5bk with an inlet slope and a latch tail 5bs. As in Figure 2 shown, the latch 5b can assume a closed position in which the latch 5b is received in the lock case 1k, and, as in FIGS Figures 1 , 3 and 4th shown can be a locked position occupy, in which the latch head 5bk protrudes from the associated faceplate-side opening from the lock case 1k into the receptacle of the strike plate or the passive leaf lock. A spring, not shown, is provided which acts on the latch 5b in the direction of its pre-closed position.

The control latch 5c, like the latch 5b, is mounted to be linearly movable in the lock case. The control trap 5c has a head with an inlet slope and a tail. The control latch 5c can assume a closed position in which the control latch 5c is retracted in the lock case (see Figures 2 , 3 and 4th ), and assume a locked position in which the head protrudes from the associated opening on the faceplate of the lock case (see Figure 1 ). A spring (not shown) is provided, which acts on the control latch 5c in the direction of its pre-closed position.

The lock is designed as a self-locking lock with a self-locking bolt 5a. This means that the bolt 5a automatically extends from its closed position into its pre-closed position as soon as the door leaf rests against the door frame in the closed position. To control the mechanism for self-locking, the lock mechanism has a blocking element 5e, a control element 5d and a release element 5f. The lock has a lock cylinder 8 with a lock bit 8b for actuating the locking device. Furthermore, a nut can be provided to which a handle or a motor drive can be connected.

The blocking member

The blocking member 5e is designed as a two-armed lever which is mounted in the lock case so as to be pivotable about an axis 5ax. The blocking element 5e can assume a blocking position in which the blocking element 5e holds the bolt 5a in its closed position, and can assume a non-blocking position in which the blocking element 5e releases the movement of the bolt 5a from its closed position into its closed position .

With the door leaf open ( Fig. 1 ) the blocking member 5e is in its position blocking the bolt 5a and ensures that the bolt 5a does not extend into its pre-locked position. For this purpose, the blocking member 5e has a hook-like projection 5ek on its first lever arm which cooperates with an edge which is arranged on the bolt 5a itself or on an element coupled to the bolt 5a. In the present exemplary embodiment, the edge is arranged as an edge 7k on a projection on the pin of an actuating lever 7. The actuating lever 7 can interact with the above-mentioned nut and / or the lock cylinder 8. In the blocking position, the edge 7k of the actuating lever 7 coupled to the bolt 5a rests on the projection 5ek of the blocking member 5e. In this position, the blocking member 5e prevents the bolt 5a from extending into its pre-closed position when spring-loaded.

With the door leaf closed ( Fig. 4 ) the blocking member 5e is in its non-blocking position of the bolt 5a. The blocking member 5e is here compared to the in Fig. 1 position shown pivoted clockwise. In the in Fig. 3 In the position shown, the projection 5ek of the blocking member 5e is out of engagement with the projection 7k of the actuating lever 7. The bolt 5a can then extend unhindered from its closed position into its pre-closed position.

The control element

The control member 5d is pivotably mounted in the lock case about an axis. It is the pivot axis 5ax, around which the blocking member 5e is also pivotably mounted. The pivot axis 5ax thus forms the common pivot axis of control member 5d and blocking member 5e. The control member 5d is designed as a two-armed lever. It has a first lever arm 5d1 which interacts with the tail of the control latch 5c. The control member 5d has a second lever arm 5d2 which cooperates with the tail 5bs of the latch 5b, specifically in the illustrated embodiment with a release member 5f movably mounted on the Schanz 5bs of the latch 5b. When the control latch 5c is moved from its pre-locked position to its closed position, an edge 5ck on the tail of the control latch 5c engages the first lever arm 5d1 of the control member 5d and pivots the control member 5d counterclockwise (see FIG Figs. 2 to 4 ). When the control latch 5c moves out of its closed position again into its pre-closed position, the control member 5d returns to its in Fig. 1 shown starting position back.

The trigger link

The release member 5f is designed as a one-armed lever pivotably mounted on the latch tail 5bs of the lock latch 5b. The release member 5f can assume a first position in which the release member 5f is out of engagement with the blocking member 5e. This first position is in Fig.1 shown. In a second position, like in the Figures 3 and 4th shown, the trigger member is 5f with the blocking member 5e in engagement. For this purpose, the blocking member 5e has a driver stop 5em on its second lever arm, on which the release member 5f can act. A leaf spring, not shown, is arranged on the latch tail 5bs and acts on the release element 5f in the direction of its second position. The position of the release element 5f is controlled by the control element 5d already described above.

How it works

The functioning of the self-locking mechanism will now be explained in the following. The open position of the door is in Fig. 1 shown. In the open position of the door, that is to say with the door leaf open, both the latch 5b and the control latch 5c are in their pre-locked positions; the bolt 5a assumes its closed position. The control member 5d is in its rest position. The control member 5d with its second section 5d2 urges the release member 5f into its first position in which the release member 5f is out of engagement with the blocking member 5e. The blocking member 5e is in its blocked position and, through its edge 5ek, prevents the bolt 5a from protruding from its closed position into its pre-closed position. The blocking member 5e and the control member 5d are, as already mentioned, rotatably mounted on the common pivot axis 5ax in the lock case. Here, the blocking member 5e and the control member 5d are slidably mounted on one another and can be moved relative to one another. In the in Figure 1 The position shown, the blocking member 5e and the control member 5d are oriented to each other so that the control member 5d with its second lever arm 5d2 covers the driver stop of the blocking member 5e, so that the release member 5f cannot come into engagement with the driver stop of the blocking member 5e.

Fig. 2 shows the lock when the door is closed. The latch 5b is moved back into its closed position by actuation of the lock cylinder. By actuating the lock cylinder 8, the latch 5b with the release member 5f hinged to it is displaced into the lock case. When the door leaf is closed, the control latch 5c comes into contact with the frame-side strike plate (not shown) and is thereby displaced in the direction of its closed position. When the control latch 5c is retracted into its closed position, the tail of the control latch 5c comes into contact with the first section of the control part 5d1 and pivots the control member 5d counterclockwise. The position of the blocking member 5e remains unchanged. This means that the control member 5d is displaced relative to the blocking member 5e, so that the control member 5d does not cover the driver stop 5em of the blocking member 5e. The driver stop 5em is therefore free and ready for an engagement of the trigger member 5f. This ready position is in Figure 2 shown.

In Fig. 3 is shown when the door leaf has reached its closed position on the door frame and the latch 5b is no longer withdrawn by actuating the lock cylinder 8. As soon as the door leaf has reached the closed position, the latch 5b can pre-lock in a recess, not shown, on the door frame side. At the same time, the control latch 5c is held in its closed position by the strike plate on the door frame side. This means that the position of the control member 5d with respect to the in Fig. 2 has not changed. When the latch 5b is pre-closed in its pre-closed position, the release member 5f initially slides along the second section 5d2 of the control member 5d, but during the further course of the pre-closure the release member 5f moves out of contact with the control member 5d. The leaf spring, not shown, now moves the release element 5f in its second position, so that the release member 5f is pivoted in the direction of the blocking member 5e. The trigger member 5f finally comes into engagement with its hook-shaped head, ie in the stop position on the driver stop 5em of the blocking member 5e, so that the engaging trigger member 5f creates a coupling between the locking latch 5b and the blocking element 5e, as in Fig. 3 shown. Due to this coupling, the locking member 5e is pivoted clockwise by the pre-locking case. As a result, the edge 7k of the operating lever 7 disengages from the projection 5ek of the blocking member 5e. This means that the bolt 5a is no longer held by the blocking member 5e. The bolt 5a now moves, acted upon by a spring (not shown), from its closed position into its pre-closed position. The lock is now locked. The locked position with pre-locked bolt 5a is in Fig. 4 shown.

The self-locking mechanism in the present lock is tamper-proof: the automatic locking bolt only occurs when the control latch 5c is closed and when the latch 5b is moved back and then moved forward. This means that simply pressing in the latch 5b or pressing in the control latch 5c alone is not sufficient to trigger the automatic locking latch. This will be briefly explained below:
If the control latch 5c is pressed in on its own, only the control latch 5c and the control member 5d are displaced. The positions of the trap 5b and the blocking member 5e remain unchanged. This means that when the control latch 5s is only pressed in, the driver stop 5em of the blocking member 5e is not covered by the control member 5d. But since the If the position of the latch 5b remains unchanged, the release element 5f does not come into engagement with the blocking element 5e, so that the automatic locking latch is not triggered.

If the latch 5b is pushed in alone, the latch 5b and the release element 5f mounted on the latch 5b are displaced back into the lock case. The positions of the blocking member 5e, the control latch 5c and the control member 5d remain unchanged. This means that the control member 5d covers the driver stop of the blocking member 5e, so that an engagement of the release member on the driver stop of the blocking member 5e is not possible. The automatic locking latch cannot be triggered by simply pressing the latch 5b.

List of reference symbols

1

lock

1k

Lock case

1b

Faceplate

5a

Swivel bolt

5aa

Rotation axis of the lock case

5b

Lock latch

5bk

Trap head

5bs

Trap tail

5c

Tax trap

5ck

Control edge

5d

Control element

5d1

first section of the control link

5d2

second section of the control member

5e

Blocking member

5ek

Edge on the blocking link

5em

Driver stop

5ax

common axis of rotation

5f

Release link

7th

Operating lever

7k

Edge on the operating lever

8th

Lock cylinder

8b

Lock bit

Claims (13)

1. Self-locking lock for a door or a window with a moveably-mounted wing, having a lock mechanism mounted in a lock case (1k), the lock mechanism comprising:

   - a bolt (5a), mounted moveably in the lock case (1k), which can be moved into a retracted position in which the bolt (5a) is accommodated within the lock case (1k) and into an advanced position in which the bolt (5a) projects partially from the lock case (1k),
   wherein the bolt (5a) is loaded by a spring in the direction of the advanced position,

   - a latch (5b), mounted moveably in the lock case (1k), which has a latch bolt head (5bk) with a lead-in chamfer and a latch shank (5bs), wherein the latch (5b) can be moved into a retracted position in which the latch (5b) is retracted into the lock case (1k) and into an advanced position in which the latch bolt head (5bk) projects from the lock case (1k),

   - a control latch (5c) which can be moved into a retracted position in which the control latch (5c) is retracted into the lock case (1k) and into an advanced position in which the control latch (5c) projects partially from the lock case (1k),

   - a blocking element (5e), mounted moveably in the lock case (1k), which interacts directly or indirectly with the bolt (5a) and which can be moved into a position in which the bolt (5a) is blocked, in which the blocking element (5e) retains the bolt (5a) in its retracted position, and into a position in which the bolt (5a) is not blocked, in which the blocking element (5e) enables the movement of the bolt (5a) from its retracted position into its advanced position,

   - a control element (5d), mounted moveably in the lock case (1k), which can be moved independently of the control latch (5c),

   wherein
   the control element (5d) interacts with the blocking element (5e) in such a manner that, depending on the position of the control element (5d), the blocking element (5e) can be coupled with the latch (5b),
   that the latch (5b) interacts with the blocking element (5e) in such a manner that, as the latch is advanced, starting out from its position in which it can be coupled with the latch (5b) the blocking element (5e) is carried along from its position in which the bolt (5a) is blocked into its position in which the bolt (5a) is not blocked,
   that, in its position in which it can be coupled with the latch (5b), the blocking element (5e) forms and/or comprises a driver stop (5em) interacting with the latch (5b) or with a part connected with the latch (5b),
   characterised in that
   the part connected with the latch (5b), which interacts with the driver stop (5em), is configured as a release element (5f) mounted moveably on the latch (5b) which, in the couplable position of the blocking element (5e), can be brought to bear against the driver stop (5em) of the blocking element (5e) .
2. Lock according to claim 1,
   characterised in that
   the release element (5f) is loaded in the direction of the blocking element (5e) by a spring arranged on the latch (5b) .
3. Lock according to any one of claims 1 or 2,
   characterised in that
   the release element (5f) is configured as a single-armed lever which is mounted swivelably on the latch (5b) and has on its lever arm end a section for engaging with or bearing against the driver stop of the blocking element (5e).
4. Lock according to any one of the preceding claims,
   characterised in that
   the blocking element (5e) and the control element (5d) are mounted moveably relatively to one another to assume a first relative position and a second relative position, so as to overlap variably,
   that the blocking element (5e) is, in a partial section, configured as a driver stop (5em) for interacting with the latch (5b) or with a part connected with the latch (5b), and
   that, in the first relative position, the control element (5d) overlaps with the partial section of the blocking element (5e) configured as a driver stop (5em) and, in the second relative position, does not overlap with the partial section of the control element (5d) configured as a driver stop (5em).
5. Lock according to any one of the preceding claims,
   characterised in that
   the blocking element (5e) and the control element (5d) are mounted moveably relatively to one another in a sliding manner.
6. Lock according to any one of the preceding claims,
   characterised in that
   the blocking element (5e) is configured as a blocking lever and the control element (5d) is configured as a control lever, and
   that the blocking lever (5e) and the control lever (5d) are mounted swivelably around a common axis of rotation (5ax) in order to assume variable overlapping positions.
7. Lock according to claim 6,
   characterised in that
   the blocking lever (5e) is configured as a two-armed lever which has a first lever arm which, in the position in which the bolt (5a) is blocked, interacts with the bolt (5a), and which has a second lever arm which, in the couplable position of the blocking element (5e), interacts with the latch (5b) or with the part connected with the latch (5b).
8. Lock according to any one of claims 6 or 7,
   characterised in that
   the control lever (5d) is configured as a two-armed lever which has a first lever arm which interacts with the auxiliary latch, and
   which has a second lever arm which interacts with the blocking lever (5e) in order to assume variable overlapping positions.
9. Lock according to any one of the preceding claims,
   characterised in that
   the lock has a socket and/or a locking cylinder (8) for moving the bolt (5a) from its advanced position into its retracted position.
10. Lock according to any one of the preceding claims,
    characterised in that
    the lock has an operating lever (7) interacting with the socket and/or with the locking cylinder (8) which interacts with the bolt (5a) for the purpose of operation.
11. Lock according to claim 10,
    characterised in that
    in its position in which the bolt (5a) is blocked, the blocking element (5e) interacts with the bolt (5a) via the operating lever (7).
12. Lock according to claim 10 or 11,
    characterised in that
    the operating lever (7) has a blocking edge (7k) and the blocking element (5e) has a projection (5ek), wherein, in the position of the blocking element (5e) in which the bolt (5a) is blocked, the blocking edge (7k) of the operating lever (7) comes to bear against the projection (5ek) of the blocking element (5e).
13. Lock according to any one of claims 9 to 11,
    characterised in that
    the operating lever (7) and bolt (5a) are connected via a slide track device, wherein the operating lever (7) has a slide track pin which engages in a slide track slot on the bolt (5a), or that
    the operating lever (7) has a slide track slot in which a slide track pin formed on the bolt (5a) engages.

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