EP2544927B1 - Locking system - Google Patents

Description

The invention relates to a locking system, in particular for an ignition lock of a motor vehicle, by means of which a lock can be opened by means of a key intended for this purpose.

Out DE 10 2005 042 618 A1 discloses a locking system for an ignition lock of a motor vehicle, in which a key is used with a substantially quadrangular cross section, which is provided on all outer sides with a Codierkanal or Codiersteg to radially movable tumblers of a lock cylinder rotatably received in a lock cylinder in a position to move, in which the tumblers are no longer included in a Zuhaltekanal the lock cylinder housing, so that the lock cylinder for igniting the internal combustion engine of the motor vehicle can be rotated relative to the lock cylinder housing. To start the internal combustion engine of the motor vehicle, a rotation of the key is usually provided by about 90 °. For safety reasons, it is desirable to be able to remove the key from the locking system only when the internal combustion engine is switched off.

CH 249 824 discloses a locking system according to the preamble of claim 1.

It is the object of the invention to provide a locking system, in particular for an ignition lock of a motor vehicle, which prevents removal of a key from the locking system in an undesired position of the key.

The object is achieved by the features of claim 1. Preferred embodiments of the invention are specified in the dependent claims.

The locking system according to the invention, in particular for an ignition lock of a motor vehicle, has a lock cylinder housing and a lock cylinder accommodated by the lock cylinder housing and rotatable relative to the lock cylinder housing. Furthermore, at least one first tumbler radially displaceable by means of a key inserted in the lock cylinder and at least one second tumbler radially displaceable by means of the key inserted in the lock cylinder are provided, the second tumbler being radially displaceable in a direction different from the first tumbler. The lock cylinder housing has a first locking channel for receiving the first tumbler and a second locking channel for receiving the second tumbler. According to the invention, a width of the first tumbler transverse to the radial direction of movement is greater than an opening width of the second tumbler channel transverse to the radial direction of movement.

Since the width of the first tumbler is greater than the width of the second tumbler channel, the first tumbler can not be picked up by the second tumbler channel. This avoids that, for example, after a rotation of the key by about 90 °, the first tumbler is received by the second locking channel and at the same time the second tumbler is received by the first locking channel, so that the key could be removed in this position from the locking system , As a result, it can be prevented, in particular, that in the case of an ignition lock of a motor vehicle, the key can be removed from the lock system used for the ignition lock while the engine is running. Instead, it is ensured that the key must be turned back to the 0 ° position or, if necessary, to a 180 ° position before the key can be removed again. In the intermediate angular positions of the key is locked by the contact of a Codierstegs or coding channel of the key to the first tumbler, so that the key can not be pulled out in the axial direction of the lock cylinder. This prevents that the key can be removed from the locking system in an undesired position.

In particular, 0.5 ≦ R <1.0, in particular 0.6 ≦ R ≦ 0.99, preferably 0.7 ≦ R ≦ 0.95, and particularly preferred, for a ratio R of the opening width of the second closing channel to the width of the first tumbler 0.8 ≤ R ≤ 0.90. This allows for a comparatively small space for forming the Zuhaltekanäle a sufficiently large contact of the first tumbler provided on the outside of the Zuhaltekanäle provided radially inwardly facing inner surface of the lock cylinder housing, so that the first tumbler does not hook on the Zuhaltekanal. In particular, the extent of the first tumbler at the radial outer end in the circumferential direction can be chosen so large that even with rounded edges and / or insertion bevels at the radially inner end of the second Zuhaltekanals the first tumbler not hooked on the second Zuhaltekanal and / or partially in the second Locking channel can penetrate.

Preferably, a clearance fit, in particular H7 / h6, H7 / f6 or F8 / h6, and / or between the second tumbler and the second locking channel is a clearance fit, in particular H7 / h6, H7 / f6 or F8 between the first tumbler and the first locking channel / h6, trained. By the clearance, the radial movement of the respective tumbler in the associated Zuhaltekanal is facilitated; so that the tumbler in the respective Zuhaltekanal can not unintentionally clamp. At the same time, it is ensured that, despite the clearance fit, the first tumbler is so wide that the first tumbler can not slide into the second tumbler, even with tolerance-related maximum play.

Particularly preferably, the first tumbler has a nose for guiding in a coding channel of the key and the second tumbler has a recess for guiding a Codierstegs of the key. Alternatively, the first tumbler has a recess for guiding on a Codiersteg of the key and the second tumbler has a nose for guiding in a Codierkanal the key. Characterized in that at the first tumbler and the second tumbler kinematically different tongue and groove connections with the key can be formed, an unauthorized opening, that is, relative rotation of the lock cylinder to the lock cylinder housing, the locking system difficult with a corresponding burglary tool. Furthermore, it is possible to provide a key which is substantially rectangular in cross-section, so that the coding channel can be formed on a broad outer side of the key and the coding web on a narrow outer side of the key. The size of the key can be chosen comparatively small and yet allow a sufficiently large variation of radially different positions for the tumbler used. At the same time, such a key can be easily manufactured. Preferably, the key is designed as a reversible key with identically formed on opposite sides contours. The locking system can be adapted to accommodate a reversible key.

In particular, the first Zuhaltekanal to the second Zuhaltekanal offset by an angle α in the circumferential direction, wherein the angle α 45 ° ≤ α ≤ 155 °, in particular 60 ° ≤ α ≤ 140 °, preferably 75 ° ≤ α ≤ 125 °, and particularly preferably α = 90 ° ± 5 °. In order to calculate the angle α, in each case the angle between two imaginary lines is used which extends from the center of the respective locking channel in the circumferential direction through the axis of rotation of the lock cylinder. In the case of a key with a substantially rectangular cross-section, it makes sense to offset the first locking channel and the second locking channel by approximately 90 ° in the circumferential direction in order to form the largest possible wall thickness between the first locking channel and the second locking channel. But it is also possible in principle that the key has more than four outer sides, so that more correspondingly more outer sides Codierstege and / or Codierkanäle and for the lock cylinder housing more than two Zuhaltekanäle can be provided. For example, the key may have a hexagonal cross section and three Zuhaltekanäle may be offset by an angle α of 120 ° and / or 60 ° to each other.

Particularly preferably, at least two first tumblers and at least two second tumblers are alternately arranged in the axial direction. By changing the direction of movement of subsequent tumblers unauthorized opening of the locking system is made difficult with a burglary tool. Furthermore, the coding or coding channel assigned to the first tumblers or the second tumblers has a correspondingly large distance in the axial direction until the next tumbler. The increased axial distance of the associated tumblers makes it possible to bring about a significantly changed radial positioning of the tumbler without having to fear a catch of the respective tumbler on the Codiersteg or in the Codierkanal. As a result, the opening position of subsequent first tumblers and subsequent second tumblers can clearly differ, correspondingly more different combinations of opening positions can be provided, which make unauthorized opening of the locking system difficult.

In a preferred embodiment, the first locking channel and the second locking channel have a radially inwardly pointing shoulder, wherein in particular more than one shoulder is provided at the level of different tumblers with different radial extensions. By means of the shoulder, the maximum possible insertion depth of a particular tumbler in the associated tumbler channel can be reduced, whereby the reduction in the maximum insertion depth, in particular in the case of different tumblers, can be pronounced to different degrees. An unauthorized opening of the locking system with a burglary tool is made more difficult because the actual insertion depth of a tumbler in the associated Zuhaltekanal without knowledge of the configuration of the paragraph can not be determined accurately.

In particular, more than one tumbler has a radially outwardly facing groove for, in particular, only partially receiving the shoulder, the extent of at least two grooves of different tumblers being of different lengths. By the one with the paragraph the Zuhaltekanals cooperating groove can also be changed the maximum insertion depth of a tumbler in the locking channel, so that the unauthorized opening of the locking system is difficult with a burglary tool. In particular, it is possible to form the shoulder as a continuous web running in the axial direction, which has a constant extent, in particular in the radial direction. The variation of the maximum possible insertion depth can be achieved in this case exclusively by the design of the grooves provided in the tumblers.

In particular, the first locking channel and / or the second locking channel have an introduction inlet for the associated guard locking. This makes it easier for the respective tumbler to slide in and out of the locking channel. A sudden locking of the locking system or a hook is thereby avoided. In particular, it is ensured at the same time that, despite the introduction inlet, the first tumbler is so wide that the first tumbler can not slide completely or partially into the second tumbler channel.

The first tumbler and / or the second tumbler are radially biased by a spring element. The spring element can be supported on the lock cylinder. In particular, a spring force can be exerted on the tumbler by means of a stop projecting from the tumbler. By the spring element, a radially outwardly acting spring force can be exerted on the respective tumbler, so that the tumblers are automatically inserted with the key removed in the Zuhaltekanälen and prevent rotation of the lock cylinder.

Particularly preferably, a respective associated locking channel is provided for the first tumbler and / or for the second tumbler on radially opposite sides. If the respective tumbler is pulled out too far from the associated Zuhaltekanal, this tumbler can penetrate into the radially opposite Zuhaltekanal and prevent rotation of the lock cylinder. An unauthorized opening of the locking system with a burglary tool is made more difficult.

Fig. 1:

eine schematische perspektivische Ansicht eines Schlüssels mit zwei Zuhaltungen,

Fig. 2:

eine schematische Längsschnittansicht des erfindungsgemäßen Schließsystems,

Fig. 3:

eine schematische Querschnittansicht eines Schließzylindergehäuses des Schließsystems aus Fig. 2,

Fig. 4:

eine schematische Querschnittansicht des Schließsystems aus Fig. 2 in einer ersten Stellung und

Fig. 5:

eine schematische Querschnittansicht des Schließsystems aus Fig. 4 in einer zweiten Stellung.

The invention will be explained by way of example with reference to the accompanying drawings based on preferred embodiments. Show it:

Fig. 1:

a schematic perspective view of a key with two tumblers,

Fig. 2:

a schematic longitudinal sectional view of the locking system according to the invention,

3:

a schematic cross-sectional view of a lock cylinder housing of the locking system Fig. 2 .

4:

a schematic cross-sectional view of the locking system Fig. 2 in a first position and

Fig. 5:

a schematic cross-sectional view of the locking system Fig. 4 in a second position.

The in Fig. 1 Key 10 shown by way of example is substantially rectangular in cross-section and, in the exemplary embodiment shown, forms coding ribs 14 at its edges 12. The key 10 can be inserted into sufficiently large insertion openings 16 of a first tumbler 18 and a second tumbler 20. The various coding webs 14 are received by corresponding recesses 22 of the respective tumbler 18, 20. By the corresponding contouring of the Codierstegs 14, the tumblers 18, 20 can be moved in a radial direction to a locking system 24, wherein the direction of movement of the first tumbler 18 from the direction of movement of the second tumbler 20 is different.

As in Fig. 2 shown locking system 24 according to the invention has a lock cylinder housing 26 in which a lock cylinder 28 is rotatably received. The lock cylinder 28 has, opposite to an insertion opening 30 for the key 10, an actuating end 32 which, upon rotation, triggers an action, for example moving a bolt of a lock or starting the internal combustion engine of a motor vehicle. In the lock cylinder 28 a plurality of first tumblers 18 and a plurality of second tumblers 20 are received radially displaceable in corresponding slots of the lock cylinder 28 in an alternating sequence. The tumblers 18, 20 are in the locked state, that is, when the lock cylinder 28 can not be rotated relative to the lock cylinder housing 26, locked by the lock cylinder housing 26. As in Fig. 3 illustrated, the lock cylinder housing 26 for this purpose on radially opposite sides in each case a first Zuhaltekanal 34 for receiving the first tumbler 18 and on radially opposite sides in each case a second Zuhaltekanal 36 for receiving the second tumbler 20. The first locking channel 34 and the second locking channel 36 are in the illustrated embodiment substantially offset by approximately 90 ° to each other in the circumferential direction. The first locking channel 34 has a first opening width a, which is greater than the second opening width b of the second locking channel 36. Taking into account that between the respective tumbler 18, 20 and the associated Zuhaltekanal 34, 36 may be provided a clearance fit, corresponding to the opening widths a, b of the tumblers 34, 36 substantially the widths a, b of the associated tumblers 18, 20 transverse to their radial direction of movement. In the illustrated embodiment, the Zuhaltekanäle 34, 36 each have a radially inwardly facing shoulder 38, which can be partially inserted into a corresponding groove 40 of the tumblers 18, 20 in order to conceal the effective maximum penetration depth of the tumbler 18, 20 as scanning protection , The tumblers 18, 20 may also be biased by a spring 42 in the radial direction.

At the in Fig. 4 shown initial position, that is, the 0 ° position, the tumblers 18, 20 are so moved radially in the fully inserted state of the key 10 in the locking system 24, that none of the tumblers 18, 20 more in the Zuhaltekanälen 34, 36 is inserted. In this position, the key 10 can be rotated together with the lock cylinder 28 relative to the lock cylinder housing 26.

At the in Fig. 5 illustrated position of the locking system 24 are the key 10 and the lock cylinder 28 in comparison to the in Fig. 4 shown position of the locking system 24 has been rotated by approximately 90 ° in the circumferential direction. In this position, the second tumbler 20 can slide into the first locking channel 34, since the width b of the second tumbler 20 is smaller than the opening width a of the first locking channel 34. However, in this position, the tumbler 18 can not slide into the second locking channel 36 with the small opening width b due to its large width a. Since the first tumbler 18 can not get into the second locking channel 36, the first tumbler 18 is immobile in the radial direction, so that the key 10 can not be removed from the lock cylinder 28. The guided in the recess 22 Codiersteg 14 would block in this case at the first tumbler 18.

Claims (9)

1. A locking system, in particular for a motor vehicle ignition lock, having a lock cylinder housing (26),
   a lock cylinder (28) accommodated in the lock cylinder housing (26) and rotatable relative to the cylinder housing (26),
   at least a first tumbler (18) that is radially displaceable with the aid of a key (10) inserted in the lock cylinder (28), and
   at least a second tumbler (20) that is radially displaceable with the aid of a key (10) inserted in the lock cylinder (28), the second tumbler (20) being displaceable in a different direction from the first tumbler (18),
   wherein the lock cylinder housing (26) has a first tumbler groove (34) to accommodate the first tumbler (18) and a second tumbler groove (36) to accommodate the second tumbler (20),
   wherein a width (a) of the first tumbler (18) transversely to the direction of radial movement is greater than an aperture width (b) of the second tumbler groove (36) transversely to the direction of radial movement,
   characterised in that
   the first tumbler (18) and/or the second tumbler (20) is/are pretensioned radially via a spring element (42), wherein each of the tumbler grooves (34, 36) comprises a shoulder 38 facing radially inwards, which is partly inserted in a corresponding groove (40) in the tumblers (18, 20)
2. The locking system according to claim 1, characterized in that a ratio R between the aperture width (b) of the second tumbler groove (36) and the width (a) of the first tumbler (18) is defined by the term 0.5 ≤ R ≤ 1.0, particularly by 0.6 ≤ R ≤ 0.99, preferably by 0.7 ≤ R ≤ 0.95, and particularly preferably by 0.8 ≤ R ≤ 0.90.
3. The locking system according to claim 1 or 2, characterized in that a clearance fit, particularly H7/h6, H7/f6 or F8/h6, exists between the first tumbler (18) and the first tumbler groove (34), and/or a clearance fit, particularly H7/h6, H7/f6 or F8/h6, exists between the second tumbler (20) and the second tumbler groove (36).
4. The locking system according to any one of claims 1 to 3, characterized in that the first tumbler (18) has a lug for guiding in an encoding channel of the key (10), and the second tumbler (20) has a recess (22) for guiding on an encoding bar (14) of the key (10), or the first tumbler (18) has a recess (22) for guiding on an encoding bar (14) of the key (10) and the second tumbler (20) has a lug for guiding in an encoding channel of the key (10).
5. The locking system according to one of claims 1 to 4, characterized in that the first tumbler groove (34) is circumferentially offset relative to the second tumbler groove (36) by an angle α, wherein the angle α is defined by the terms 45° ≤ α ≤155°, particularly 60° ≤ α ≤140°, preferably 75° ≤ α ≤125°, and particularly preferably α = 90° ± 5°.
6. The locking system according to any one of claims 1 to 5, characterized in that at least two first tumblers (18) and at least two second tumblers (20) are arranged in alternating sequence in the axial direction.
7. The locking system according to any one of claims 1 to 6, characterized in that the first tumbler groove (34) and the second tumbler groove (36) have radially inwardly facing shoulder (38), wherein in particular more than one shoulder (38) is provided with different radial extensions at the level of different tumblers (18, 20).
8. The locking system according to claim 7, characterized in that more than one tumbler (18, 20) has a radially outwardly facing groove (40) particularly for only partial accommodation of the shoulder (38), wherein at least two grooves (40) of different tumblers (18, 20) are of different lengths.
9. The locking system according to any one of claims 1 to 8, characterized in that the first tumbler groove (34) and/or the second tumbler groove (36) has/have an insertion chamfer for the associated tumbler (18, 20).

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