EP2267251A2 - Lock cylinder with lockable plate tumblers - Google Patents

Abstract

The lock has a cylinder housing (11), a cylinder core (13) and a set of blockable disk tumblers (21) i.e. wafer tumblers, provided in the core that is rotated relative to the housing in rotary opening direction (O) when the disk tumblers are in unlatched position. Each disk tumbler has a toothed zone (35) brought into engagement with a counter-toothed zone (63) of the lock such that the disk tumbler is blocked against movement opposite to bias direction (X) when the disk tumbler is in latched position and torque is exerted onto the core in opening direction.

Description

The invention relates to a cylinder lock of the type of a plate cylinder, comprising a cylinder housing and a cylinder core rotatable therein, wherein in the cylinder core a plurality of platelet tumblers are provided which have at least one respective engagement portion. The platelet tumblers are movable between an unlocked position and a latched position and are biased to the latching position along a respective biasing direction. In the locking position of the respective engagement portion engages in an associated recess in the cylinder housing to lock the cylinder core against rotation relative to the cylinder housing. The cylinder core is rotatable relative to the cylinder housing in an opening direction of rotation when the disk tumblers are in the unlocked position.

A problem with such a cylinder lock is the so-called locking picking. This is the attempt to open a cylinder lock without a matching key non-violent. For this purpose, special opening tools are used with which the platelet tumblers are offset from their respective locking position against the bias to the annular gap between the cylinder housing and the cylinder core. If, at the same time, a suitable torque is exerted on the cylinder core in the opening direction of rotation, for example by means of a so-called tensioner, it can be achieved in some cases by utilizing the usually existing torsional backlashes that the plate tumblers hang on the edge of the associated recess of the cylinder housing, so that the cylinder core can be rotated without the desired blocking effect. This is referred to as a "setting" of the platelet tumblers, which is carried out successively for the individual platelet tumblers.

From the DE 10 2007 056 739 A1 a cylinder lock of the type described above is known. In this cylinder lock increased Nachsperrsicherheit is achieved in that at least two of the platelet tumblers have a different backlash between the engaging portion of the respective plate tumbler and located in the opening direction lateral boundary of the associated recess in the cylinder housing. While such a cylinder lock has been proven in practice, there is a need to further increase the Nachsperrsicherheit.

It is an object of the invention to provide a cylinder lock of the type of a plate cylinder, which has an improved security against manipulation, in particular in relation to the described locking locks.

This object is achieved by a cylinder lock with the features of claim 1, and in particular by the fact that at least one of the platelet tumblers has a toothed zone, which is engageable with a Gegenverzahnungszone of the cylinder lock in such a way that the plate tumbler is locked against movement of the respective biasing direction when the plate tumbler is in the locking position and torque is applied to the cylinder core in the opening direction of rotation.

In the cylinder lock according to the invention, a respective toothing zone of one or more of the platelet tumblers acts with an associated one Gegenverzahnungszone of the cylinder lock by a mutual meshing engagement together such that the relevant platelet locking is locked in the locking position when a torque in the opening direction of rotation is applied to the cylinder core. Between the said toothing zone and the associated counter-toothing zone, a positive connection is brought about in this case. Thus, the above-explained "setting" of the relevant platelet locking is prevented, namely by not allowing at all, that the platelet locking in question is transferred without authorization from the locking position to the unlocking position. In this case, the fact is exploited that in a typical manipulation attempt at the same time a torque in the opening direction of rotation is exerted on the cylinder core, which is not the case under normal operation of the cylinder lock by means of the associated key. In other words, as soon as starting from the locking position of the plate tumbler the cylinder core is rotated in the opening direction of rotation (which is possible to some extent due to the existing backlashes) said tooth zone of the respective plate tumbler engages with the associated counter tooth zone. Thus, the platelet tumbler in question can not be brought into the unlocking position at all as part of a typical "picking" test, so that there is also no risk that the platelet tumbler (and in particular all platelet tumblers one after the other) will be held in the unlocked position.

Advantageous embodiments of the invention are mentioned below and in the dependent claims.

According to a particularly simple embodiment, said gearing zone of the at least one platelet cage and the associated Gegenverzahnungszone of the cylinder lock at least one recess or at least one elevation, which is insertable into the recess. As a result, the illustrated tooth engagement can already be realized in order to be able to lock the respective plate tumbler in the locked position, since no particularly high forces can be transmitted anyway by means of the commonly used "picking" tools.

The mutual meshing engagement is also particularly effective when the toothing zone of the at least one plate tumbler and the associated counter-toothed zone of the cylinder lock cooperate in a direction which is substantially perpendicular to the prestressing direction. In other words, a positive connection can thereby be realized, which particularly reliably prevents unauthorized displacement of the plate tumbler in the unlocking position.

According to a further embodiment, the toothing zone of the at least one plate tumbler and the counter-toothing zone of the cylinder lock cooperate within the cylinder core, i. relative to the axis of rotation of the cylinder core radially within the annular gap between the cylinder housing and the cylinder core. As a result, a simpler and more accurate design of the counter-toothing zone is possible because this example, must not be incorporated into said recess of the cylinder housing (for the engaging portion of the plate tumbler).

In order to ensure a proper function of the cylinder lock under authorized operation by means of the associated key, despite the usual tolerances, it is preferred if said tooth zone of the at least one plate tumbler and the associated Counter-toothing zone of the cylinder lock cooperate such that the explained mutual engagement can be canceled by a torque against the opening direction is applied to the cylinder core. In order to be able to cancel an inadvertent locking of the relevant plate tumbler in the locking position due to the illustrated tooth engagement, so it is only necessary to rotate the cylinder core by means of the associated key briefly against the opening direction of rotation.

According to a further advantageous embodiment, the at least one platelet cage has, in addition to the said engagement portion, a further engagement portion which opposes said engagement portion with respect to the respective biasing direction. The platelet locking locks in this case the cylinder core against a rotational movement relative to the cylinder housing, even if the plate tumbler is moved against the respective biasing direction in the direction of another locking position in which engages the further engagement portion in an associated further recess in the cylinder housing. In this embodiment, the plate tumbler also has a further toothed zone which can be brought into engagement with the counter-toothing zone of the cylinder lock in such a way that the plate tumbler is locked against movement along the respective prestressing direction when the platelet tumbler is in the further locking position and on the Cylinder core torque is applied in the opening direction. In other words, the further engagement portion of the plate tumbler also serves to lock the cylinder core against rotational movement relative to the cylinder housing, if it should succeed, despite the illustrated tooth engagement (between said tooth zone and the Gegenverzahnungszone) the plate tumbler against the biasing direction move and if the plate tumbler is moved beyond the unlocking position into the further locking position. In such a case, the meshing engagement between said further toothing zone and the associated counter-toothing zone results in that rotation of the cylinder core is not possible. This embodiment thus contributes to a further increase in the security against manipulation.

According to a preferred embodiment, said counter-toothed zone is provided on at least one locking element of the cylinder lock, which is formed separately from the cylinder core and the cylinder housing. This simplifies the manufacture of the cylinder lock, since the counter-toothed zone can be formed, for example, as an external toothing of said locking element and does not have to be incorporated into a groove of the cylinder housing or the like.

In the presence of such a separate locking element, it is further preferred if it is movably mounted on the cylinder core. The mobility of a separate locking element can be used to make the engagement of the said toothing zone and associated counter-toothed zone even more reliable and to provide an additional torsion protection for the cylinder core.

In particular, said locking element may be pivotally mounted on the cylinder core, wherein the pivot axis is preferably parallel to the axis of rotation of the cylinder core.

Thus, the counter-toothing zone of said locking element reliably again disengaged from the associated toothed zone of the it is further preferred, when said locking element is biased in the direction of the cylinder housing, that is in a direction away from the respective toothing zone or from the relevant plate tumbler.

If the said locking element is movable, it is further preferred that the locking element is supported on the cylinder housing, while the toothed zone of the respective plate tumbler cooperates with the counter-toothed zone of the locking element in the manner explained in order to lock the plate tumbler in the locking position. By supporting the locking element on the cylinder housing ensures that in the case of applying a torque to the cylinder core in the opening direction of rotation reliably a mutual engagement between the said tooth zone and the associated counter-toothing zone is made, and that the locking element does not follow this about the rotational movement of the cylinder core , In other words, it is ensured that the blocking element of the associated plate tumbler does not "run away".

It is particularly advantageous if the said blocking element, while it is supported on the cylinder housing, locks the cylinder core against a rotational movement relative to the cylinder housing. In other words, said locking element (in addition to the interaction of the engagement portion of the respective plate tumbler with the associated recess in the cylinder housing) form a rotation lock for the cylinder core. The platelet tumblers can thus be dimensioned comparatively weak. This results in particularly compact designs of the cylinder lock, with correspondingly small thickness of the platelet tumblers, in particular in the axial direction (again relative to the axis of rotation of the cylinder core).

According to a further advantageous embodiment, the said plate tumbler adjacent to said toothed zone has a release recess into which the respective locking element can engage when the plate tumbler is in the unlocked position due to the proper use of the associated key, the blockage of the cylinder core explained above Locking element is released when the blocking element engages in the release recess of the plate tumbler. The said release recess thus makes it possible to move the blocking element in order to release the described anti-rotation lock between the cylinder core and the cylinder housing, but the corresponding movement of the blocking element is only possible if the relevant plate tumbler is in the unlocked position.

According to a further embodiment, a plurality of the platelet tumblers is assigned a respective blocking element, in particular all platelet tumblers of the cylinder lock. This results in a particularly high security against manipulation.

In particular, the multiple platelet tumblers can be assigned a common blocking element. Thus, a plurality of separate locking elements is not required, resulting in an advantageous simple construction of the cylinder lock results.

Fig. 1

zeigt ein Plättchenzylinderschloss in einer Explosions- ansicht.

Fig. 2a und 2b

zeigen das Plättchenzylinderschloss in verriegeltem Zustand in einer Querschnittsansicht bzw. in einer Perspektivansicht (ohne Zylindergehäuse).

Fig. 3a und 3b

zeigen das Plättchenzylinderschloss in entriegeltem Zustand in einer Querschnittsansicht (wobei der Zy- linderkern um 90° gedreht ist) bzw. in einer Perspek- tivansicht (ohne Zylindergehäuse).

The invention will now be described by way of example only with reference to the drawings.

Fig. 1

shows a plate cylinder lock in an exploded view.

Fig. 2a and 2b

show the plate cylinder lock in the locked state in a cross-sectional view and in a perspective view (without cylinder housing).

Fig. 3a and 3b

show the plate cylinder lock in the unlocked state in a cross-sectional view (wherein the cylinder core is rotated by 90 °) or in a perspective view (without cylinder housing).

The platelet cylinder lock shown is initially mainly based on Fig. 1 described. The lock has a cylinder housing 11 and a cylinder core 13 rotatable therein. The cylinder housing 11 has a recess 15 and a further recess 17 (FIG. Fig. 2a and 3a ), which extend groove-shaped on the inner lateral surface of the cylinder housing 11 parallel to the axis of rotation A of the cylinder core 13, wherein the two recesses 15, 17 are diametrically opposed to each other. Furthermore, the cylinder housing 11 has on its inner lateral surface a blocking recess 19, which also extends parallel to the axis of rotation A. The recesses 15, 17 and the blocking recess 19 form deviations from a substantially circular cross-section of the inner circumferential surface of the cylinder housing 11.

In the cylinder core 13 several platelet tumblers 21 are held translationally movable. Each plate tumbler 21 has a core portion 23, an engagement portion 25 and a relative thereto with respect to the rotation axis A diametrically opposite another engagement portion 27. The respective core portion 23 surrounds a key opening 29 of the respective plate tumbler, the key openings 29 of the platelet tumblers 21 and an insertion 31 of the cylinder core 13 common form a key channel 33. At each plate tumbler 21, a toothed zone 35 and (in the biasing direction X adjacent thereto) a further toothing zone 37 are formed. Between the toothing zone 35 and the further toothing zone 37 of each plate tumbler 21, a release recess 39 is provided. The release recess 39 is therefore also arranged in the pretensioning direction X adjacent to the respective toothing zone 35. Further, each plate tumbler 21 is associated with a biasing spring 41, by means of which the plate tumbler 21 is biased along a biasing direction X in a subsequently explained locking position.

The platelet cylinder lock shown also includes an anti-rotation plate 43 which is also movably held in the cylinder core 13 and to which a biasing spring 45 is associated.

Furthermore, the platelet cylinder lock has a blocking element 47, which is pivotably mounted on the cylinder core 13 by means of a pivot pin 49, which engages in a pivot opening 51 of the cylinder core 13. The pivot pin 49 penetrates a torsion spring 53, which cooperates with the locking element 47 and the cylinder core 13 to bias the locking element 47 in a biasing direction Y away from the respective toothed zone 35 of the platelet tumblers 21, as will be explained below ( Fig. 2a and 3a ). This bias is also supported by a compression spring 55 which engages between a support portion 57 of the locking member 47 and a spring retainer 59 of the cylinder core 13. Further, the locking member 47 has a web portion 61 which extends parallel to the axis of rotation A of the cylinder core 13. At the platelet tumblers 21 facing side of the web portion 61 has a Gegenverzahnungszone 63. The locking element 47 has at its the Platelet tumblers 21 facing away from the outer side further comprises a support portion 65 which also extends parallel to the axis of rotation A.

The platelet cylinder lock shown also includes a drill shield 67 and an associated key 69.

The following is mainly with reference to the Fig. 2a and 3a the general mode of operation of the illustrated plate cylinder lock explains: Fig. 2a shows the lock before the complete insertion of the associated key 69. Due to the bias by means of the respective biasing spring 41, the plate tumblers 21 are in a locking position in which engages the respective engagement portion 25 in the associated recess 15 of the cylinder housing 11. The cylinder core 13 is thereby locked against rotation relative to the cylinder housing 11. In contrast, if the associated key 69 is fully inserted into the bowl channel 33, the plate tumblers 21 are brought against the biasing direction X in a respective unlocking position in which the engaging portions 25 are withdrawn from the recess 15 of the cylinder housing 11 at the level of the annular gap, between the Cylinder housing 11 and the cylinder core 13 is formed. The cylinder core 13 can now be rotated by means of the key 69 in an opening direction of rotation O. Fig. 3a shows the result of such a rotation by 90 °. The anti-rotation plate 43 ( Fig. 1 prevents rotation of the cylinder core 13, as long as the associated key 69 is not fully inserted into the keyway 33.

It should be noted that for the various platelet tumblers 21, the pretension directions X may also be directed opposite to each other, in particular when using a reversible key 69. In this In this case, the locking position of one of the platelet tumblers 21 is diametrically opposite to the locking position of another of the platelet tumblers 21.

A special feature of the plate cylinder lock shown is in the respective toothed zone 35 of the plate tumblers 21, which cooperates with the counter-toothed zone 63 on the web portion 61 of the pivotable locking element 47. If a torque in the opening direction of rotation O is exerted on the cylinder core 13, as long as the respective plate tumbler 21 still in the locking position according to Fig. 2a The respective toothed zone 35 of the plate tumblers 21 comes into positive engagement with said counter-toothed zone 63. The prestressed in biasing direction Y locking element 47 is namely supported on the inner circumferential surface of the cylinder housing 11, wherein the support portion 65 of the locking element 47 in the blocking recess 19 of the cylinder housing 11 engages, so that the locking element 47 can not retreat despite the aforementioned torque loading of the cylinder core 13. Due to the thus brought about positive engagement between the toothing zone 35 and the counter tooth zone 63, the respective plate tumbler 21 against movement against the biasing direction X, ie of the in Fig. 2a locked position shown locked in the direction of unlocking. As a result, the lock is effectively protected against unauthorized opening by successively "setting" the die tumblers 21 with the application of torque, wherein displacement of the respective platelet tumblers 21 from the lock position to the unlock position is not permitted at all.

The effective direction of said positive engagement between the respective toothed zone 35 and the counter-toothing zone 63 extends Here, substantially perpendicular to the biasing direction X of the plate tumblers 21, ie substantially parallel to the biasing direction Y of the locking member 47. Due to the biasing of the locking element 47 in the direction Y, an unintentional mutual engagement of the toothed zone 35 of the plate tumbler 21 and the counter-toothed zone 63 of the blocking element 47 prevented.

By the engagement of the support portion 65 of the locking element 47 in the blocking recess 19 of the cylinder housing 11 is achieved that the locking element 47 locks the cylinder core 13 (in addition to the engaging portions 25 of the platelet tumblers 21) against rotational movement relative to the cylinder housing 11, as long as the platelet tumblers 21 itself in the locking position according to Fig. 2a are located. However, as soon as all the platelet tumblers 21 are brought into the respective unlocking position by inserting the associated key 69 into the keyway 33, the web portion 61 of the blocking element 47 can pivot into the respective release recess 39 of the platelet tumblers 21 by rotating the cylinder core 13 in the opening direction of rotation O, so that the explained additional blocking effect of the locking element 47 is repealed. The inner circumferential surface of the cylinder housing 11 in this case acts as a slotted guide for the pivoting movement of the locking element 47. Fig. 3b shows that the release recesses 39 of the platelet tumblers 21 in this state form a continuous groove to measure the web portion 61 of the locking element 47.

Out Fig. 2a is also recognizable that the further recess 17 of the cylinder housing 11 allows cooperation with the respective further engagement portion 27 of the platelet tumblers 21 to lock the cylinder core 13 against rotational movement relative to the cylinder housing 11, if the relevant plate tumbler 21 from the locking position according to Fig. 2a is moved beyond the explained unlocking position out into a further locking position. In this case, a positive engagement between the further toothing zone 37 of the respective plate tumbler 21 and the Gegenverzahnungszone 63 of the locking member 47 is effected to prevent a return movement of the plate tumbler 21 as long as a torque in the opening direction of rotation O is applied to the cylinder core 13.

LIST OF REFERENCE NUMBERS

11

cylinder housing

13

cylinder core

15

recess

17

another recess

19

locking aperture

21

Plättchenzuhaltung

23

core section

25

engaging portion

27

another engagement section

29

key opening

31

insertion

33

keyway

35

toothed zone

37

further toothing zone

39

Freigabeausnehmung

41

biasing spring

43

Verdrehsicherungsplättchen

45

biasing spring

47

blocking element

49

pivot pin

51

Anlenköffnung

53

torsion spring

55

compression spring

57

support section

59

spring mount

61

web section

63

Counter teeth Zone

65

support section

67

drill protection

69

key

A

Rotary axis of the cylinder core

X

Biasing direction of the plate tumbler

Y

Biasing direction of the locking element

O

Opening direction of the cylinder core

Claims (15)

Cylinder lock of the plate cylinder type, comprising a cylinder housing (11) and a cylinder core (13) rotatable therein, wherein in the cylinder core are provided a plurality of disk tumblers (21) having at least one respective engaging portion (25), the disk tumblers being between an unlocking position and an unlocking position Locking position are movable and are biased along a respective biasing direction (X) in the locking position, wherein in the locking position, the respective engagement portion (25) in an associated recess (15) in the cylinder housing (11) engages the cylinder core (13) against rotation relative to the cylinder housing to lock, and wherein the cylinder core (13) relative to the cylinder housing (11) in an opening rotational direction (O) is rotatable when the die tumblers (21) are in the unlocked position,
characterized,
in that at least one of the die tumblers (21) has a toothed zone (35) which is engageable with a counter tooth zone (63) of the cylinder lock such that the die tumbler (21) is locked against movement against the respective biasing direction (X) Platelet lock (21) is in the locking position and on the cylinder core (13) a torque in the opening rotational direction (O) is applied. A cylinder lock according to claim 1, wherein the toothing zone (35) of the at least one plate tumbler (21) and the counter-toothing zone (63) of the cylinder lock at least one recess and at least one elevation, which is insertable into the recess,
and or
wherein the toothing zone (35) of the at least one plate tumbler (21) and the counter-toothing zone (63) of the cylinder lock cooperate in a direction substantially perpendicular to the respective biasing direction (X). Cylinder lock according to one of the preceding claims, wherein the toothed zone (35) of the at least one plate tumbler (21) and the counter-toothed zone (63) of the cylinder lock cooperate within the cylinder core (13). Cylinder lock according to one of the preceding claims, wherein the toothed zone (35) of the at least one plate tumbler (21) and the counter-toothed zone (63) of the cylinder lock cooperate such that the mutual engagement can be canceled by acting on the cylinder core (13) against the opening direction of rotation (O) is exercised. A cylinder lock according to any one of the preceding claims, wherein the at least one blade tumbler (21) has a further engaging portion (27) facing said engaging portion (25) with respect to the respective biasing direction (X), the blade tumbler (21) supporting the cylinder core (13 ) against a rotational movement relative to the cylinder housing locks when the plate tumbler (21) against the respective biasing direction (X) is moved in the direction of a further locking position, in which the further engagement portion (27) in an associated further recess (17) in the cylinder housing (11) engages, wherein the plate tumbler (21) has a further toothed zone (37) which is engageable with said counter tooth zone (63) of the cylinder lock in such a way that the plate tumbler (21) against movement along the respective biasing direction (X) is locked when the plate tumbler (21) is in the further locking position and on the cylinder core (13) a torque in the opening rotational direction (O) is applied. Cylinder lock according to one of the preceding claims, wherein the Gegenverzahnungszone (63) is provided on at least one locking element (47) of the cylinder lock, which is formed separately from the cylinder core (13) and the cylinder housing (11). Cylinder lock according to claim 6, wherein the at least one locking element (47) is movably mounted on the cylinder core (13). Cylinder lock according to claim 7, wherein the at least one locking element (47) is pivotally mounted on the cylinder core (13). Cylinder lock according to one of claims 6 to 8, wherein the at least one locking element (47) in the direction (Y) of the cylinder housing (11) is biased. Cylinder lock according to one of claims 6 to 9, wherein the at least one locking element (47) is supported on the cylinder housing (11), while the toothed zone (35) of the at least one plate tumbler (21) with the Gegenverzahnungszone (63) of the at least one locking element (47 ) cooperates. A cylinder lock according to claim 10, wherein the at least one locking element (47), while supported on the cylinder housing (11), locks the cylinder core (13) against rotational movement relative to the cylinder housing. A cylinder lock according to claim 11, wherein the at least one plate tumbler (21) adjacent to the toothed zone (35) has a release recess (39) into which the at least one locking element (47) is insertable when the platelet lock (21) is in the unlocked position wherein the locking of the cylinder core (13) by the locking element (47) is released when the locking element engages in the release recess (39) of the plate tumbler. Cylinder lock according to one of claims 10 to 12, wherein the at least one locking element (47), while it is supported on the cylinder housing (11) engages in a blocking recess (19) in the cylinder housing (11). Cylinder lock according to one of claims 6 to 13, wherein a plurality of, in particular all of the plate tumblers (21) is associated with a blocking element (47),
wherein the plurality of platelet tumblers (21) is preferably associated with a common blocking element (47). A cylinder lock according to claims 12 and 14, wherein the locking member (47) has a web portion (61) which engages the respective release recess (39) of the die tumblers (21) when the plurality of die tumblers are in the unlocked position.

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