EP0831196B1 - Burglar proof lock - Google Patents

Description

The invention relates to a lock with one in one Lock body lockable locking block and one in Lock body guided and in its locking position preloaded bolt, which is in the locked position an undercut provided on the locking block engages behind.

Such locks come for example as cable, Chain, padlock or padlocks to use and point often has the disadvantage that it is relatively easy to break open are. In particular, one can on the lock body exerted acceleration force are caused to the bolt due to its inertia relative to Lock body moves against its bias, causing then ultimately a release of the locked in the lock body Closing block takes place (percussion principle).

In US-A-5 531 487 is a door top lock designed as a latch lock with two housing parts and one in a first housing part guided and described in their locked position biased case. The first housing part is attached to a door leaf, the second to a door jamb. The latch is in the locked position in the second Housing part introduced. To enable the door to close, the Stand out in the section that is inserted into the second housing the side facing the door leaf is convex. For prevention a breakup by inserting a flat, flexible object in the gap between the two housing parts and moving the trap due to the pressure exerted on the curvature, the latch has one an approach provided in the second housing part cooperating Inhibiting element, which when inserting the flat, flexible object blocked movement of the latch into its unlocked position.

An object of the invention is a lock type mentioned in such a way that the Security against break-ins is increased.

According to the invention this object is achieved in that the Bolt one with an attachment provided in the lock body cooperating inhibiting element, which at proper operation of the lock a movement of the Riegel blocked in its unlocked position.

According to the invention, the latch is therefore on the one hand by its Preload and secondly through the interaction of Approach and inhibitor in its locked position held. For moving the bolt into its unlocked position So it is with a lock according to the invention not enough anymore, just lock the bar to shift its pretension into the unlocked position, it must also be ensured that the Approach provided in the lock body and that provided on the bolt Inhibitor are moved relative to each other in such a way that the approach is no longer the inhibitor or bolt blocked.

This ultimately has the advantageous result that the Lock no longer by simply accelerating the lock body can be opened because this acceleration is not at the same time the blocking caused by the inhibiting element and attachment can cancel. Removing the blocking mentioned with a simultaneous shift of the bolt in its unlocked position is due to a mere acceleration the lock body cannot be reached, in particular, because the bolt to remove the blockage at least moved in a different direction over a short distance must be as when moving the bolt from its Locked position in its unlocked position. The Bar therefore takes place when opening an inventive Schlosses not a pure linear movement, but moves briefly in a certain direction to clear the blockage of approach and inhibiting element, whereupon the in movement of the bolt in another direction its unlocking position takes place. A corresponding The bolt's trajectory is simple and easy acceleration in only one direction Lock body not achievable, which ultimately achieved is that the security against theft of an inventive Lock compared to known from the prior art Locks is significantly increased.

A particularly simple implementation of the inhibitor and Approach can be obtained by inhibiting and / or approach form an undercut and in the Blocking position are engaged with each other or are hooked together. So with the simplest mechanical Mean the desired position in the locked position Blocking of the bolt reached.

The inhibiting element can be provided on the bolt Projection or a notch provided on the bolt be formed, as will be explained below using the Embodiment is described.

The one interacting with the inhibiting element is preferred Approach at least in the latter case than in the lock body trained edge realized. In the event that the Lock body formed for example as a die-cast part the approach can be particularly in the manner mentioned Produce economically, since only a minor Modification of the corresponding die casting mold required is without separate additional components in the lock body should be provided.

It is particularly preferred if the inhibiting element on the Closure opening facing side of the bolt is formed is. In this case, namely by one on the Lock body locked locking block exercised pulling movement move the bolt in such a way that the locking element and attachment are engaged with each other so that a reliable locking of the bolt is achieved. Because it in an attempt to lock the lock by exercising an acceleration to open the lock body, always it is necessary to exert a pulling force on the locking block, will prevent unauthorized opening of the Schlosses additionally difficult, because just mentioned Pull movement a particularly safe blocking of the bolt is reached in its locking position.

It is also advantageous if the bolt in the lock body with play, since he then moves in different directions and not just a precisely guided one Movement between the unlocked and locked positions can execute. In particular, the only movement of the Riegel's for the purpose of lifting the blockage between Approach and inhibitor possible.

To ensure that the lock is locked using a key can be easily unlocked, for example when unlocking the lock one acting on the bolt additionally force component that generates a relative movement between inhibitor and approach, which ultimately to remove the blockage between the inhibitor and Approach leads. This additional force component is applied to the Latch, for example, with a bolt in his Unlocking position moving actuator, in particular by means of a cam of a locking cylinder exercised.

By actuating the lock cylinder can according to the invention, first the blocking between the inhibiting element and approach are canceled, followed by a movement the bolt is in its unlocked position.

The latch preferably has an incline, in particular Displacement surface over which the bolt from the locking block is displaceable against its bias, if Locking block and lock body locked together become. In this way, for example, a Locking of the lock possible with the key removed.

The displacement surface is preferably arranged in such a way that during the movement caused by the locking block the bolt against its pretension in its unlocked position an additional one that acts on the bolt Force component can be generated, by means of which inhibiting element and approach can be disengaged. This ensures that no undesirable during the locking process Block the bolt in its locked position takes place, but a smooth locking process is possible, in which the bolt from the locking block its locking position in its unlocking position is moved, whereupon the bolt is then complete in the lock body inserted locking block due its bias back into its locked position snaps back in which he has an undercut of the locking block engages behind and in this way the locking block locked.

An additional security can be with a Lock can be obtained by the spring on the bolt applied bias in addition to that in the direction the locking component acting force component has another force component, by means of which inhibiting element and approach can be engaged. This ensures that the bolt in the locked position - as long as the latch is not properly connected indirectly appropriate key is applied - is always blocked, because the spring mentioned for a corresponding interaction of approach and inhibitor, i.e. for a blockage the latch provides.

All features of the invention are in the same way Cable, chain, padlock or padlocks applicable.

Further preferred embodiments of the invention are in specified in the subclaims.

Fig. 1

eine teilweise geschnittene Ansicht eines erfindungsgemäß ausgebildeten Schloßkörpers einschließlich eines Schließklobens in einer ersten Betriebsstellung,

Fig. 2

eine teilweise geschnittene Ansicht eines erfindungsgemäß ausgebildeten Schloßkörpers einschließlich eines Schließklobens in einer zweiten Betriebsstellung,

Fig. 3

eine teilweise geschnittene Ansicht eines erfindungsgemäß ausgebildeten Schloßkörpers einschließlich eines Schließklobens in einer dritten Betriebsstellung, und

Fig. 4

eine teilweise geschnittene Ansicht eines erfindungsgemäß ausgebildeten Schloßkörpers einschließlich eines Schließklobens in einer vierten Betriebsstellung.

The invention is described below using an exemplary embodiment with reference to the drawings; in these show:

Fig. 1

FIG. 2 shows a partially sectioned view of a lock body designed according to the invention including a locking block in a first operating position,

Fig. 2

2 shows a partially sectioned view of a lock body designed according to the invention, including a locking block in a second operating position,

Fig. 3

a partially sectioned view of a lock body designed according to the invention including a locking block in a third operating position, and

Fig. 4

a partially sectioned view of a lock body according to the invention including a locking block in a fourth operating position.

Fig. 1 shows the sectional view of a lock body 1 and the side view of a partially in the lock body 1st introduced locking block 2. Lock body 1 and locking block 2 are components in the illustrated embodiment a cable lock, so that both the lock body 1 as well as the locking block 2 with one end each for reasons of clarity not shown cable are connected. By locking the one Cable end connected locking block 2 in the other Cable end connected lock body 1 can therefore be a closed ring-shaped structure are produced, the for example, is suitable for locking a two-wheeler.

The locking block 2 has a rotationally symmetrical axis A. Shape and one in the area of its front end Undercut 3, which is in the locked position (Fig. 3) of a led in the lock body 1 bolt 4th is attacked.

In the lock body is an essentially cylindrical one Recess 5 provided, the axis with the longitudinal axis A the locking block 2 inserted into the lock body 1 coincides and their inner diameter is essentially the same Outside diameter of the locking block 2 at its widest Position corresponds.

A further recess 6 is provided in the lock body 1, their longitudinal extent perpendicular to the axis of the cylindrical Recess 5 runs and that as a guide for the bolt 4th serves. The bolt 4 is under tension in the recess 6 guided, the bias by a coil spring 7 is generated, which on the inserted locking block 2 opposite end of the bolt 4 attacks. The feather 7 acts as a compression spring in the exemplary embodiment shown, which the bolt 4 in the direction of its locking position, thus acted on in the direction of the closing block 2.

The bolt 4 has in the area of the locking block 2 end facing an oblique displacement surface 8, which when inserting the locking block 2 into the lock body 1 with a front end region 9 of the locking block 2 interacts. The interaction of end area 9 and Displacement surface 8 is such that the end region 9 slides along the displacement surface 8, wherein at the same time the bolt 4 is inserted into the recess 5 Closing block 2 evades and thereby from his in its locking position shown in Fig. 1 Unlocked position (Fig. 2) is moved.

On its underside or on that of the latch opening 10 (Fig. 4) of the lock body 1 facing side of the bolt 4th an inhibiting element provided as a projection 11 is formed.

In the operating position shown in Fig. 1 this projection 11 engages with one in the lock body 1 trained approach 12, which is shown in the Embodiment as an edge present in the lock body 1 is trained.

Are in the operating position shown in Fig. 1 Projection 11 and neck 12 in engagement or hooked together so that the bolt 4 in its in Fig. 1st position shown is blocked.

The function of the lock according to the invention is as follows with reference to FIGS. 1, 2, 3 and 4 explained:

When the locking block 2 is detached from the lock body 1 the latch 4 in the position shown in FIG. 1, provided the lock is not operated using the key in which position it is irrelevant whether Projection 11 and approach 12 are hooked together or Not. In principle, it is also possible that counter the representation in Fig. 1 projection 11 and approach 12 from Lock body 1 released locking block 2 not together are hooked.

When inserting the locking block 2 in the Lock body 1 provided recess 5 touches the End area 9 of the locking block 2, the displacement surface 8 of the bolt 4. By the insertion movement of the locking block is on the displacement surface 8 and thus on the bolt 4th exerted a force in the direction of arrow B so that a possibly existing between projection 11 and approach 12 Blocking is released. Once this blockage is resolved is, the side 13 facing away from the projection 11 Latch on the upper area of the recess 6 for contact, so that no further movement of the bolt 4 in the direction of Arrow B is more possible. Basically, the above described movement of the bolt 4 in the direction of Arrow B enables the bolt 4 in the recess 6 is led with play, i.e. between latch 4 and the top The area of the recess 6 is shown in FIG. 1 Operating position an intermediate space 14 is present.

After moving in the direction of arrow B Bolt 4, the bolt 4 is then replaced by another Insertion movement of the closing block 2 against it Preload pushed back and in the direction of arrow C postponed. With this shift are projection 11 and Approach 12 disengaged.

The movement of the bolt 4 in the direction of arrow C takes place until the bolt 4 in the shown in Fig. 2 Position. In this position the spring is 7 compressed and - which can be seen particularly well from FIG. 2 is - projection 11 and approach 12 are not in Engaging with each other.

If now the locking block 2 over that shown in Fig. 2 Position moved further into the recess 6 is finally done due to the spring 7th caused bias a snap back of the bolt 4 in its locking position shown in Fig. 3, in the the bolt 4 the undercut 3 of the locking block 2 engages behind and thus the locking block 2 in the lock body 1 locked.

When pulling on the locking block 2 in this position, i.e. if an attempt is made to remove the locking block 2 from the lock body To release 1, the bolt 4 in the direction of the arrow D drawn, which means that projection 11 and approach 12th hook, as shown in Fig. 3. In this So it is not possible to position the bolt 4 in its position Fig. 2 shown to move unlocking position that it can be excluded that the castle could be pure acceleration of the lock body 1 can be opened can. It should be emphasized again that opening a Lock by means of a simple acceleration movement it is necessary to pull on the locking block 2. This pulling motion causes, as I said, the locking of the bolt 4 over Projection 11 and approach 12 and thus prevents one lock according to the invention an unauthorized opening of the same by exerting an acceleration movement on the Lock body 1.

If the lock now starts from the position shown in FIG. 3 is to be unlocked, the bolt 4 by means of for reasons of clarity, actuating means not shown first a force in the direction of arrow B exerted, whereupon a force in the direction of the arrow C is exercised. These two, one after the other on the bolt 4 The forces exerted first release the blockage between projection 11 and approach 12 and then one Moving the bolt 4 into its shown in Fig. 2 Unlocked.

The unlocking position of the lock from the lock body 1 released locking block is shown again in Fig. 4, here the bolt 4 via suitable actuating elements, in particular by means of a key in FIG. 4 position shown is held. As soon as the bolt 4 no longer acted upon by the actuating elements is, it moves due to the spring 7th caused bias again in its shown in Fig. 1 Position in which the lock body is locked again 1 and locking block 2 is possible.

The invention is not based on the illustrated embodiment limited. There are a variety of realize other embodiments. In particular it is within the scope of the invention also possible with a padlock realize two-sided locking, in which either one bolt or both bolts can be blocked according to the invention are.

Claims (11)

1. A lock formed as a cable lock, a chain lock, a hoop lock or a padlock having a locking member (2) which can be latched in a lock body (1) and a bolt (4) which is guided in the lock body (1), is pre-loaded into its latching position and engages behind an undercut (3) provided at the locking member (2) in the latched position,
   characterised in that the bolt (4) has a catch member (11) which cooperates with a formation (12) provided in the lock body (1) and which blocks a movement of the bolt (4) into its unlocked position on an improper actuation of the lock.
2. A lock in accordance with claim 1, characterised in that the catch member (11) and/or the formation (12) form an undercut and are in engagement with one another or are hooked to one another in the blocking position.
3. A lock in accordance with any one of the preceding claims, characterised in that the catch member (11) is formed by a projection (11) provided at the bolt (4) or by a notch provided at the bolt.
4. A lock in accordance with any one of the preceding claims, characterised in that the formation (12) cooperating with the catch member (11) is implemented as an edge (12) formed in the lock body.
5. A lock in accordance with any one of the preceding claims, characterised in that the catch member (11) is formed on the side of the bolt (4) facing the locking member opening (10).
6. A lock in accordance with any one of the preceding claims, characterised in that the bolt (4) is guided in the lock body (1) with clearance.
7. A lock in accordance with any one of the preceding claims, characterised in that an additional force component acting on the bolt (4) can be produced by means of an actuation element moving the bolt (4) into its unlocked position, in particular by means of a cam of a lock cylinder, with the catch member (11) and the formation (12) being able to be brought out of engagement by means of said force component.
8. A lock in accordance with any one of the preceding claims, characterised in that the bolt (4) has a displacement surface (8), in particular an inclined displacement surface, by which the bolt (4) can be displaced opposite to its pre-load by the locking member (2).
9. A lock in accordance with claim 8, characterised in that the displacement surface (8) is arranged such that an additional force component acting on the bolt (4) can be produced during the movement of the bolt (4) opposite to its pre-load brought about by the locking member (2), with the catch member (11) and the formation (12) being able to be brought out of engagement by means of said force component.
10. A lock in accordance with any one of the preceding claims, characterised in that the pre-load exerted on the bolt (4) by a spring (7) has a further force component, in addition to the force component acting in the direction of the latched position, with the catch member (11) and the formation (12) being able to be brought into engagement by means of said further force component.
11. A lock in accordance with any one of the preceding claims, characterised in that the catch member (11) and the formation (12) can be brought into engagement by a loading of the locking member (2) taking place in the latched position in the direction of the unlatched position.

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