WO2001061130A1

WO2001061130A1 - Locking system, especially for motor vehicles

Info

Publication number: WO2001061130A1
Application number: PCT/EP2001/001104
Authority: WO
Inventors: Günter BARRENBERG; Dieter Sander
Original assignee: Huf Hülsbeck & Fürst Gmbh & Co. Kg
Priority date: 2000-02-04
Filing date: 2001-02-02
Publication date: 2001-08-23
Also published as: AU4830801A; DE10005136A1

Abstract

The invention relates to a locking system comprising a lock cylinder for an inner track key comprising at least two coded tracks (61, 62) on one side of the key (60) and a number of plate tumblers (40) are arranged in a cylinder core (30). In order to improve four-track locking systems of this type, the height ratios between the maximum progressive ratio hcode 1 (71) of the first coded track (61) of one key side, the maximum progressive ratio hcode 2 (72) of the second coded track (62) of the same key side, the key height hS (76) and the height hT (74) of the partial areas (42) on the plate tumblers (40) are selected such that they satisfy the equation hcode 1 (71) + hcode 2 (72) + hT (74) > hS (76). This measure completely prevents the ability to pick inventive locks of this type using known tools for breaking in, e.g. a 'Little Joe' tool. The invention also provides that all partial regions (42) of the plate tumblers are assigned to one side of the lock cylinder and each second plate tumbler is loaded in a direction toward the cylinder jacket that is opposite the direction of the spring loading of the preceding plate tumbler.

Description

Locking system, especially for motor vehicles

The invention is directed to a locking cylinder of the type mentioned in the preamble of claim 1 and to a locking cylinder of the type mentioned in the preamble of claim 7. Such locking cylinders come. e.g. for motor vehicles for use.

In a locking cylinder known from Hyundai with a plate locking system for a key with four inner tracks, tumblers are sorted in two directions (up / down) against the force of return springs on each side of the key. On each side of the key there are 2 internal code tracks, which are scanned by sections of the plate tumblers in opposite directions. The partial areas have a considerably smaller height than the distance between the two opposing code paths on a key page is wide.

In the event of an undesired opening attempt by "picking ^" , the individual tumblers are successively brought into their release position using the play of the plate tumblers with special picking tools, and "parked ^" in this position with the help of the normal position generated by the return spring.

In a particularly effective picking method with a demolition tool (called "Little Joe"), all the tumblers of a locking cylinder are first moved in their maximum possible increment. Following this, the demolition tool is very slowly moved out of the key channel and thereby the tumblers falling back under the spring load get caught on the edge generated by the play of the locking cylinder between the cylinder core and the cylinder jacket. If all tumblers are parked in this way, the locking cylinder can be turned. This type of picking is already made very difficult, but not impossible, by the use of tumblers with opposite torque, as the "Little Joe" tools are becoming more and more sophisticated.

The object of the present invention is therefore to provide a locking cylinder with plate tumblers for inner track keys, which offers sufficient security against unintentional opening by ^" picking ^" , in particular with a "Little Joe" tool or a tool related to this ,

This object is achieved by the measures mentioned in the characterizing part of claim 1, which are of particular importance below.

The size relationships between the maximum step h _{code of} the one code path of a key side, the maximum step change h _{code2 of} the second code path of this key side of the key height h _s and the height h _{τ of} the partial areas on the plate tumblers are selected such that they have the formula:

h _C odel ⁺ _code2 + _τ >

suffice.

These measures prevent a picking tool, such as a "Little Joe tool" is used in the locking cylinder of a locking system according to the invention.

For a picking tool, the fulfillment of the conditions of these formulas have the consequence that the channel or the groove, which lies between the travel paths of the picking tool and which the partial areas of the plate tumblers on their maximum jump height should no longer be far enough. around one

Sub-area still allow passage through the groove. The picking tool can therefore no longer be inserted into the key channel of a locking cylinder according to the invention. Also the selective use of a picking tool, in which initially only the plate tumblers, which interact with one of the code tracks on a key page, are moved to their maximum position and the subsequent use of a second picking tool. with which the plate tumblers, which interact with the second code path of a key page, are moved to their maximum step increment is no longer possible. Because of the inventive configuration of the maximum step increments in relation to the height of the partial areas and the key height or the height of the key channel, the reinsertion of a picking tool for moving the plate tumblers of the second code path on a key side would result in the plate tumblers already being parked. which cooperate with the first code track are released again from this position, since the partial areas of these plate tumblers are in any case also detected by the retracted picking tool and are moved back into a locking position in the direction of their spring loading.

According to claim 2, it may also be advantageous if the width of the groove. which is formed by the two parallel regions of the two code paths lying opposite one another on a key side, is defined by the equation h _N (= h _τ - p). Here, h _{N is} the distance between parallel areas of the two code paths h _τ lying opposite one another on a key side. the already known height of the partial areas and p the necessary play between the partial areas and the code paths, the game having to meet the following condition:

^A code 1 + h _code , + h _τ > h _s

If these conditions are met, each code track also functions as a management function that best works with the keyword “forced guidance” characterizes. This positive guidance according to the invention is of great importance in particular in the communication of electronic locking systems with the mechanical locking cylinders. With electronic locking systems it often happens that the mechanical actuation of a locking cylinder is not carried out for years. As a result, the plate tumblers in the lock cylinder can become stiff, so that when the lock is actuated with a key, for example, the plate tumblers no longer fall completely back into their securing position after the key has been removed. However, this is avoided by the forced guidance of the partial areas in the key groove, since the partial areas are moved back into their starting positions.

According to claim 3, it can therefore also be advantageous if the opposing code paths of a key page are adapted to one another in terms of their geometry and thus ensure good guidance of the partial areas engaging in the groove.

According to claim 4, it can also be advantageous if the partial areas on the edges that come into mechanical contact with the slope areas of the code tracks have run-up slopes or the like, so that there is no canting or snagging when scanning these slope areas of the code tracks. The edges of the sub-areas can e.g. also be rounded.

According to claim 6, it can also be advantageous if all the spring elements are arranged on one side of the cylinder core, the spring elements then preferably having a flattened shape in order to prevent an extension of the overall length of the locking cylinder.

However, the object of the present invention is also achieved by the measures mentioned in the characterizing part of claim 7, as is easy to show below: Accordingly, the partial areas (extensions) of the plate tumblers, which when the key is inserted into the key channel, enters the inner code paths of the key, can all be arranged to one side of the cylinder core. This measure is combined with the fact that half of all plate tumblers are each preloaded on the cylinder jacket in a direction opposite to the preload of the other half of the plate tumblers. Through these measures, the one who tries to pick such a locking cylinder is faced with the unsolvable task of picking the partial areas of the plate tumblers on two sides of the key channel in two opposite directions and then fixing them in opposite "park" positions. However, this is impossible due to the overlapping of the plate tumblers and the close spacing of the plate tumblers from one another.

Further measures and advantages of the invention result from the subclaims, the following description and the drawings. The invention is shown in several exemplary embodiments in the drawings. Show it:

Fig. 1 shows schematically a cylinder core in a first embodiment of the

Invention with key inserted therein in top view.

2 shows a longitudinal section through the cylinder core from FIG. 1 according to the section line II - II there,

3 shows a longitudinal section through the cylinder core from FIG. 1 according to the section line III - III there,

4 shows a cross section through the cylinder core from FIG. 1 according to the section line IV - IV there and a pictogram characterizing the tumbler,

5 shows a cross section through the cylinder core from FIG. 1 according to the section line V - V there as well as a pictogram characterizing the tumbler, 6 schematically shows an arrangement of plate tumblers for locking cylinders according to FIG. 1,

7 schematically shows a possible break-open tool with an indicated partial area of a plate tumbler according to the invention,

8 schematically shows a second arrangement of plate tumblers for locking cylinders according to the invention,

Fig. 9 schematically shows a third arrangement according to the invention of

Plate tumblers for locking cylinders.

1 to 6, the invention according to claim 1 is shown in one embodiment. 1 to 3 show a cylinder core 30 in the key channel 34 a key 60 is inserted. Plate tumblers 40 are arranged in the cylinder core 30, the partial areas 42 and 43 of which protrude into the key channel and are sorted there via the code tracks 61, 61 ', 62, 62', which are arranged on both sides of the key 60. In this sorted position, the circular surface 41 of the plate tumblers 40 is approximately flush with the lateral surface 3 1 of the cylinder core 30.

4 is a first cross section through the cylinder core 30 with indicated

Cylinder jacket 20 and a pictogram characterizing the plate tumbler 40 shown there. The cylinder core 30 is rotatably supported in the cylinder jacket 20.

The cylinder core 30 runs with its lateral surface 31 on the inner surface 21 of the cylinder jacket 20. The plate tumbler 40 is arranged in a plate tumbler receptacle 59 in the cylinder core 30. This plate tumbler 40 is biased by a spring element 16, which is arranged in a spring hole 32 in the cylinder core 30 and is supported on the rear wall of this spring hole 32, against the cylinder jacket 20 in the direction of arrow 18 (x direction). For this purpose, the plate tumbler 40 has an attachment point 46 arranged on the side against which the head of the Spring element 16 presses. In the cylinder jacket 20 z on two opposite sides. B. top and bottom locking grooves 24, 25 embedded in the inner surface of the cylinder jacket. These locking grooves 24, 25 generally run parallel to the key channel 34 along the length of the cylinder jacket 20. In the locking position of the locking cylinder, ie when no suitable key is inserted into the key channel 34, the plate tumbler 40 is in its unsorted position, whereby Locking member 44 of the plate tumbler 40 is inserted into the locking groove 24, and thus prevents rotation of the cylinder core 30 in the cylinder jacket 20. In the position shown here, in which the key 60 is inserted into the key channel 34, the plate tumbler 40 is sorted, ie the locking member 44 is moved out of the locking groove 24, and the circular surfaces 41 arranged at the top and bottom of the plate tumbler directly adjoin the lateral surface 31 of the cylinder core 30, so that the cylinder core 30 can be rotated within the cylinder jacket 20 (if all plate tumblers are sorted accordingly), and the locking cylinder 10 is to be actuated in this way.

The cylinder core 30 is rotated about the cylinder axis 50. Via the cylinder axis 50 and the key channel 34, the position of a plane can also be in the rest position of the locking cylinder 10, as shown in FIG. 4

51 are defined, which divides the locking cylinder 10 into a left and a right side 54, 55.

The pictogram shown below FIG. 4 very schematically represents a view perpendicular to the cutting direction shown in FIG. 4, only the trace of the spring hole (the spring element 16) being shown, which is identified by the reference symbol 52. The track of the plate tumblers 59 adjoins this track of the spring hole 52. The represented "z" with the reference number 58 indicates the position of the partial area 42 of the plate tumbler in relation to the position of the spring hole

52 on. The arrow 56 shows the direction of action of the torque exerted by the spring element 16 on the plate tumbler, which, however, is shown here in relation to the direction of rotation to the cylinder axis 50 of the lock cylinder 10. The character "z" serves as an indication of the position of the cylinder axis 50. 5 shows a further plate tumbler 40 in a locking cylinder 10, which is preloaded on the cylinder jacket 20 in the direction 19 (-x direction) via a spring element 17. This plate tumbler has a locking member 45 which has moved out of the lower locking groove 25. since the plate tumbler 40 is sorted with its partial area 42 via the inner code track 62 of the key 60.

5 again shows the direction of the torque 57, based on the cylinder axis 50, as well as the position of the partial area 42, based on the track of the plate tumbler 59 and the position of the track of the spring hole 53. The broken line the trace of the spring hole indicates that the spring element 17 is inserted here from below into the cylinder core 30 of the lock cylinder 10 and therefore presses downward against the attachment point 47 of the plate tumbler 40.

4 and 5 that the spring elements 16 and the counter spring elements 17 exert opposite torques 56, 57 on the plate tumblers assigned to them.

As can be seen in particular from FIGS. 2 and 3, the cylinder core 30 is released by sorting the plate tumblers 40 and their subareas 42, 43 by means of the code tracks 61, 61 ', 62, 62 ^"of the key 60. The code tracks 61, For this purpose, 61 ′, 62, 62 ′ have step jumps 73, by means of which the partial areas 42, 43 are lifted at the contact points 79 against the spring force that loads them when the key 60 is fully inserted into the key channel, so that the circular surfaces 41 of the plate tumblers 40 are approximately flush 4 and 5) In the present example, the key 60 has two code tracks 61, 61 'and 62.62' on each side of the key, each in the opposite direction Sort spring-loaded sections 42, 43. For better passage of the sections 42, 43 between the code tracks 61, 61 ', 62, 62 ^" . especially in The area of the slopes 63, 64 of the code tracks 61, 61 ', 62, 62 ^" have the

In this exemplary embodiment, partial areas 42, 43 have run-on slopes 78.

The locking cylinder also has step changes of different heights, as can be seen from the cylinder core 30 shown here. Each of the code tracks 61, 61 ^" . 62, 62 'has at least one step jump of maximum jump height h _code , and h _{code 2} 71, 72. Via which the partial areas 42, 43 experience maximum deflection. The partial areas 42, 43 themselves have one Height h _τ 74 which is smaller than the distance h _N 75 between two parallel areas 65, 66 of the mutually opposite code paths 61, 61 ', 62, 62'. The difference between the height h _N and h _τ is the play p of the partial areas 42, 43 between the opposing code tracks 61, 61 ', 62. 62'. According to the invention, the height of the key h _s 76 can be defined as follows:

h _cod -, (71) + h _{code 2} (72) + h _τ (74)> h _s (76)

The maximum increments h _code , 71, h _{code 2} 72 of the code paths 61, 61 '. 62. 62 ^" , the height h _τ 74 of the sections 42, 43 and the height of the key h _s 76 kept in proportions which satisfy the above formula, it is impossible to lock the cylinder with an opening tool, especially according to the aforementioned" Little Joe "Principle of opening without authorization.

This is illustrated again in FIG. 7. First there is shown a demolition tool 80 which has the dimensions h _τ 76 of an original key. The break-open tool 80 has maximum step increments 81 and 82, which are sufficient to raise all sub-areas 42, 43 of a locking cylinder to the maximum in the respective lifting direction. The partial areas 42, 43, the height h _τ 74 of which corresponds to the formula according to the invention, are, however, too large to be passed through the channel 82. The demolition tool cannot be inserted into the key channel at all. However, even if the maximum step increments 81, 82 are inserted into the key channel spatially or temporally offset with a demolition tool, the locking cylinder according to the invention can no longer be opened. The subsequent maximum step increment 81 or 82 would be the already raised partial areas 42, 43 pull down again, while in the

Opposite direction spring-loaded by him. A departure is also not possible here.

FIG. 6 shows the embodiment of the invention according to FIGS. 1 to 5 again in the form of a pictogram. Through the use of spring and counter-spring elements, a torque in the direction of action 56 and a torque in the direction of action 57 are exerted on each of the plate tumblers 59 (track of the plate tumblers) assigned to them, so that the picking of a plate tumbler always picks the second plate tumbler of a pair 49 difficult. The load on a key inserted into the key body due to the spring loading of the plate tumbler is also uniform, since half +/- 1 of all plate tumblers are loaded upwards against the cylinder jacket (as can be seen from the track of the spring holes 52, 53 with a solid line is), and the other half +/- 1 of the spring elements are the plate tumblers and thus the key against the lower part of the cylinder jacket, (as indicated by the track of the spring holes 52, 53 with dashed lines).

The embodiment of a lock cylinder according to claim 6 shown in FIG. 8 corresponds essentially to the lock cylinder shown in FIG. 6. However, the spring elements indicated according to the track of the spring holes 52 ", 53" are all arranged on one side of the locking cylinder, in this example on the side 55, to the right of the plane 51. However, these can also be arranged to the left of level 51. With this locking cylinder, however, the width of the spring elements and the associated spring holes has been reduced in order not to increase the overall length of the locking cylinder according to the invention. In such locking cylinders, oval or rectangular spring elements can therefore be used, for example, but which have the same spring force as the known circular spring elements. In the embodiments according to FIGS. 8 and 9, picking resistance is increased due to the fact that all partial areas 58 are arranged on one side (here, for example on page 55) of the plane 51 running through the locking cylinder, and these spring elements (track of the spring elements 52 ) preload the plate tumblers (track of the plate tumblers 59) in opposite directions with respect to the cylinder jacket.

It remains to be noted that the embodiments shown here are only exemplary implementations of the invention. However, these are not limited to this. For example, locking cylinders with spring and counter spring elements can also be used for keys other than the key type described here with internal code paths. For example for keys with external (peripheral) keyways.

LIST OF REFERENCE NUMBERS

Lock cylinder game

Spring element Counter spring element / spring element Direction (of the preload (x)) Direction (of the preload (-x)) Cylinder jacket Inner surface of the cylinder jacket

Locking groove locking groove

Cylinder core lateral surface of the cylinder core spring hole (of the spring element 16) spring hole (of the counter spring element 17) key channel

Plate tumbler Circular area of the plate tumbler Partial area / extension of the plate tumbler Partial area / continuation of the plate tumbler Blocking member of the plate tumbler Blocking member of the plate tumbler Starting point of the spring element 16 Starting point of the counter spring element 17 Plate tumbler pair of lock cylinder axis level track of the spring hole 32 "track of the spring hole 32 track of the spring hole 33" track of the spring hole 33 the plate tumbler track of the plate tumbler / plate tumbler recording key / inner path key first code path 'first code path second code path' second code path gradient of code paths 61, 61 'gradient of code paths 62, 62' parallel areas of code paths 61, 61 'parallel areas of code paths 62, 62 '

Maximum step jump of the first code path Maximum step jump of the second code path Step changes Height of the partial areas (42, 43) Distance between parallel areas (64, 65) Height of the key 60 77 game between 42, 43 and

78 bevels on 42, 43

79 contact point

80 demolition tool

81 maximum increment

82 maximum increment

83 distance between 81, 82

Claims

Patent claims before:

Locking system with a locking cylinder for an inner track key with at least 2 code tracks (61, 61 '; 62, 62') on one side of the key (60). in particular for motor vehicles in which a plurality of plate tumblers (40) are arranged in a cylinder core (30),

and in which the plate tumblers (40) are preloaded on the cylinder jacket (20) in each case by a spring element (16, 17) acting laterally on them in the direction (18, 19).

and in which partial areas (42, 43) with a height h _τ (74) are arranged on the plate tumblers (40) in such a way that they protrude into the key channel (34) and there over the internal code tracks (61, 61 "; 62. 62 ') of the key (60) can be sorted, and the plate tumblers (40) can be transferred into an unlocking position in this way,

and in which on at least one side (54, 55) of the locking cylinder (10) at least two partial areas (42, 43) are arranged, the associated plate tumblers (40) of which are spring-loaded in the opposite direction (18, 19),

wherein at least one of these plate tumblers with a maximum increment h _{code x} (71) of the one code track (61, 61 ') can be transferred into its unlocked position and at least one further of these plate tumblers (40) with a maximum increment h _code , (72) of the second Code track (62, 62 ') can be moved into its unlocked position,

characterized,

that the height relationships between the maximum step change h _code , (71) of the first code path (61, 61 ') of a key page, the maximum Step h _{code 2} (72) of the second code track (62, 62 ') on the same key side, the key height h _s (76) and the height h _τ (74) of the partial areas (42, 43) on the plate tumblers (40) are selected in this way are that

ri (71) + h _{code 2} (72) + h _τ (74)> h _s (76)

Locking system according to claim 1, characterized in that the distance h _N (75) between parallel areas (65, 66) of the two code tracks (61, 61 '; 62, 62') opposite one another on a key side is given by the formula

h _N (75) = h _τ (74) + p (77)

is defined, and where p (77) represents the necessary play between the partial areas (42, 43) and the code tracks (61, 61 '; 62. 62'), which is defined according to

P (77) <[h _code , (71) + h _{code 2} (72) + h _τ (74)] - h _s (76).

Locking system according to claim 1 or 2, characterized in that the opposing code paths (61, 61 '; 62, 62') are matched to one another in their geometry.

Locking system according to claim 1 or 2, characterized in that the partial areas (42, 43) have a rectangular basic shape in cross section, with bevels (78) arranged at their corners, which are aligned with the slope (62, 64) of the code tracks (61, 61 '; 62, 62') correspond between the individual increments (73).

5. Locking system according to one of claims 1 to 4, characterized in that pairs (49) of plate tumblers (40) are provided, the spring elements (16, 17) each in opposite directions (56, 57) a torque on them each exercise assigned plate tumblers (40).

6. Lock cylinder with spring-loaded plate tumblers (40) on which partial areas (42, 43) are arranged such that they protrude into the key channel (34) and can be sorted there via inner code tracks of the key, in particular according to claim 1,

characterized,

that all partial areas (42, 43) are arranged on one side (54, 55) of the plane (51),

and that every second plate tumbler (40) is spring-loaded onto the cylinder jacket (20) in a direction (18, 19) opposite the spring load of the previous plate tumbler (40).