EP2305926B1 - Locking device comprising a lock cylinder and a corresponding key - Google Patents

Description

The invention relates to a locking device with a lock cylinder and a matching key, wherein the key has a flat key bit with a narrow spine, two substantially parallel broad sides and on the opposite back of the breast at key-side coding positions encoding incisions, wherein the lock cylinder is a cylinder housing , one mounted in a bearing bore of the cylinder housing, a keyway for insertion of the key bit having cylinder core, arranged at at the stop in the keyway cam with the schlüsselbartseitigen Codierpositionen coincident cylinder-side Codierpositionen arranged, cooperating with the key bit-side Codierungsseinschnitten, inserted into Kernstiftbohrungen tumblers and a in one extending transversely to the core pin bores supplementary core hole, a conclusions The scan width is greater than the distance of the vertex of the deepest-cut encoding portion from the ridge, the scan position being so close to an edge edge of a scan cut less than the lowest-cut encoding groove that a depression of the lesser clipped coding cut to the depth of the deep cut coding incision leads to an omission of the sampling point. A locking device of this type is known from the DE 27 38 313 C2 , The locking device described therein has core holes in core holes which scan the coding cuts of a flat key. At the same axial height of one of the core pins, in complementary core bores extending transversely to the core pin bores, there are respective scan members which scan the tip portion of the core pins as the core pin enters its associated code groove. In a key with too small incision depth of the coding incision, the two blunt keys of the scanning member cooperate with a reduced diameter portion of the core pin so that they release locking stages against which a housing pin can collide upon rotation of the cylinder core.

Another locking device is used by the US 3,742,744 described. The key described there has a flat cam, a narrow back, a back opposite chest and two with profile grooves and arranged between the profile grooves tread ribs running parallel to each other wide sides. The key-breast is provided with a multitude of individual deep-cut coding incisions. Each of the coding sipes has a vertex. The vertex is spaced from the spine of the cam. One of the vertices has a minimal distance to the key back. It is the deepest cut of the coding. The coding cuts are equidistant from each other and are located at coding positions. The individual coding positions are equidistant from each other. On the key broadside, there is also a sampling point designed as a recess, which can be scanned by a supplementary tumbler pin mounted in a core bore. The distance at which the scanning point is spaced from the spine of the key substantially corresponds to the distance that has the vertex of the deepest recessed coding recess to the back. The associated lock cylinder has a housing, a rotatable in a bearing bore of the housing core and a plurality of tumblers. The tumblers are in core holes or in housing bores and are designed as pins that block the rotation of the core with not key inserted. The tumbler pins are equidistant from each other in the direction of extension of a key channel in the core and are located at coding positions. Is the matching key in the keyway to a stop position pushed, the coding positions of the key bit coincide with the coding positions of the lock core, so that the tips of the core pins engage in the Codiereinschnitte. From the GB2314582A a closure device according to the preamble of claim 1 is known in which the sampling points lie between two coding incisions. A common method to open such lock cylinder is the so-called Schlagschlüsselmethode, are used in the key whose coding incisions are cut to the maximum possible depth. Basically, it is sufficient to deepen the coding cuts to a depth which corresponds to the depth of the deepest coding cut of the matching key.

In order to improve the Aufsperrschutz a generic lock cylinder against the Schlagschlüsselmethode, it is initially and essentially provided that the distance of the sampling point from the back is greater than the distance of the apex of the deepest incised coding incision. The Schlüsselbreitseitenabtaststelle lies between two immediately adjacent Codierpositionen and so close to a peripheral edge of a coding incision that its depression leads to the same depth, which has the deepest cut incision, to a removal of the sampling. The coding cut is usually made with a grinding wheel having an angular grinding profile. If the coding recess adjacent to the scanning point is deepened with this grinding wheel, the scanning point is ground away. Since the sampling point lies between two coding positions, it is also located between two tumbler pins. The complementary tumbler pin scanning the scanning location can not now be held in the proper position by a portion of the key broadside. Does this Ergänzungszuhaltungsstift together with a supplementary housing pin, the supplementary housing pin can not be brought from a locked position. The sampling point can be assigned to a tread rib. If the tread rib removed, the Ergänzungszuhaltungsstift also can not in the proper position. In a preferred embodiment of the invention, it is provided that the scanning member is a guided in a core hole pin whose head is at least partially in an opening which can be brought into an alignment position with a housing pin bore. In an attempt to open the lock cylinder according to the invention with the Schlagschlüsselmethode, which are inserted in the coding incisions core pins or the core pins associated housing pins can be brought into a release position. This has the consequence that the cylinder core can be rotated. He can be turned so far until the core hole in which the Ergänzungszuhaltung is placed in alignment with a housing bore. The housing pin can then be acted upon by the associated spring in the not filled from the head of Ergänzungszuhaltung or at least partially filled core hole. If the opening of the supplementary core bore does not form a slope, the housing pin is caught in the supplementary core hole.

The object is achieved by the invention specified in the claims. The invention relates to a lock cylinder for a closing device with a cylinder housing, which has a cylinder bore mounted in a bearing bore of the cylinder housing, a keyway for inserting a key bit of a key having cylinder core arranged on cylinder-side Codierpositionen, in the bearing bore open Kernstiftbohrungen core pins for entry into coding cuts of the key bit and a scanning element for scanning a key wide-side scanning point between two immediately adjacent core pins.

To achieve the object mentioned above, it is provided in this lock cylinder that the distance between the tip of the scanning member of the bearing bore side opening of the pin tumbler is smaller than the length of the longest core pin. This results in the closing technical advantages described above.

The invention further relates to a key for the locking device described above. The Schlüsselbreitseitenabtaststelle can be formed as Breitseitenvertiefung or as broadside projection.

Fig. 1

in der Draufsicht einen Schlüssel;

Fig. 2

die Seitenansicht auf einen Schließzylinder, teilweise aufgebrochen;

Fig. 3

einen Querschnitt durch den Schließzylinder gemäß der Linie III - III mit eingestecktem passenden Schlüssel;

Fig. 4

eine Darstellung gemäß Fig. 3, jedoch mit um 90° im Uhrzeigersinn gedrehtem Zylinderkern;

Fig. 5

eine Darstellung gemäß Fig. 3, jedoch mit einem Schlüssel ohne Profilrippe 16;

Fig. 6

eine Darstellung gemäß Fig. 4 mit einem Schlüssel gemäß Fig. 5 und mit gefangenem Gehäusestift 24;

Fig. 7

eine Darstellung gemäß Fig. 3 mit eingeschobenem Schlüssel, bei dem jedoch der Codierungseinschnitt 6b auf das Niveau der gestrichelten Linie 10 in Fig. 1 vertieft worden ist,

Fig. 8

eine Darstellung gemäß Fig. 4 mit einem Schlüssel gemäß Fig. 7 und mit gefangenem Gehäusestift 24 und

Fig. 9

den Ausschnitt IX in Fig. 2.

An embodiment of the invention will be explained below with reference to accompanying drawings. Show it:

Fig. 1

in the plan view a key;

Fig. 2

the side view of a lock cylinder, partially broken;

Fig. 3

a cross section through the lock cylinder according to the line III - III with inserted matching key;

Fig. 4

a representation according to Fig. 3 but with a cylinder core rotated by 90 ° clockwise;

Fig. 5

a representation according to Fig. 3 but with a key without profile rib 16;

Fig. 6

a representation according to Fig. 4 with a key according to Fig. 5 and with the housing pin 24 caught;

Fig. 7

a representation according to Fig. 3 with the key inserted, but with the coding notch 6b at the level of the dashed line 10 in FIG Fig. 1 has been deepened,

Fig. 8

a representation according to Fig. 4 with a key according to Fig. 7 and with captured case pin 24 and

Fig. 9

the section IX in Fig. 2 ,

The Indian FIG. 1 key shown has a ridge 12 and a projecting from the rake cam 2. The cam 2 has in its direction of extension at least two mutually parallel profile grooves 14, 15. Between the two profile grooves 14, 15 extends a tread rib 16. The dashed line 8 is a distance r from the back 3 of the flat-shaped cam 2 indicated, to the cut into the chest 5 of the key coding cuts 6a to 6f can be cut. Then the vertices of the obliquely converging flanks of the coding cuts 6a to 6f are on the line 8 of the lowest possible cuts.

Parallel to the line 8, a line 10 of the maximum depth of cut of the individual key is shown. In this line 10, which is spaced from the spine 3 by the distance s, there is at least one vertex of a deep-cut coding sipe. In the exemplary embodiment, this is the coding incision 6d.

The cam 2 has a total of six coding positions a to f. Other embodiments, not shown, may have more or fewer coding positions.

The reference numeral 7 denotes a scanning point, which lies on the broad side 4 of the cam 2. The sampling 7 is unprofiled in the embodiment. But it can also be formed by a depression or an increase. The sampling 7 is spaced by the measure t from the back 3. The measure t is greater than the dimension s, which relates to the distance of the vertex of the deepest incision coding incision 6d from the back. The sampling point 7 lies between the coding positions b and c, ie between the two vertices the coding cuts 6b and 6c. The sampling point 7 is located approximately in the middle between the two coding positions b and c. In any case, the scanning point 7 lies closely adjacent to a peripheral edge 11 of the coding recess 6b. The coding cut 6b is cut less deeply than the deep cut coding cut 6d. With dashed lines and the reference numeral 11 ', a subsequent recess of the coding recess 6b is shown. The sampling 7 is located between the peripheral edge 11 and a possible producible by depression peripheral edge 11 '. If the coding recess 6b is recessed to the depth of the maximum deep coding recess 6d, so that the vertex of the coding recess 6b is spaced apart from the back 3 by the distance s, the scanning point 7 falls away. It is removed during deep grinding or milling of the coding recess 6b.

In the exemplary embodiment, the sampling 7 is located on a tread rib 16 which is interrupted by at least one coding incision. If only this profile rib 16 is removed, the level of the scanning point 7 also changes.

The lock cylinder 17 has a housing 18 with a bearing bore 19, in which a cylinder core 20 is rotatably mounted. The cylinder core 20 has a keyway 21 in which the key bit 2 of the key 1 can be inserted with the tip 13 ahead until the stop 9 of the key 2 abuts against the end face of the cylinder core 20. Then, the coding positions a to f of the key bit 2 coincide with coding positions of the cylinder core 20. At these coding positions, the cylinder core has core holes 26 in which core pins 23 are inserted. The flange portion 22 of the housing 18 has housing bores 31 which are aligned with the core holes 26 and in which core pins 24 einliegen, which are acted upon by a spring 25 in the direction of the keyway 21.

The insertion of the matching key 1 in the keyway 21 has the consequence that the core pins 23, which are supported with their tips in the coding cuts 6 a to 6 f, are sorted so that their end faces lie in the cylinder jacket surface of the cylinder core 20, so that the Cylinder core 20 can be rotated.

In a transverse to the core pin holes 26 extending complementary core hole 27 is a Ergänzungszuhaltungsstift 28 with a head 30 and a probe tip 29. The extending between probe tip 29 and head 30 shaft 29 'is guided in a small diameter bore portion 27' of the core bore. The tip 29 is at the height of the sampling 7. The Ergänzungszuhaltungsstift 28 thus supported with its probe tip 29 on the rib 16 of the cam 2 from.

The supplementary core bore 27 is located between two core pin bores 26. The head 30 is located in an enlarged diameter portion 27 "of the core bore 27. The head 30 has a round, enlarged cross-section, so that the area in the enlarged diameter portion 27" protrudes into a Escape position to the housing pin bore 31 can be brought. If the end face of the head 30 is held in the cylinder jacket plane of the cylinder core 20, then the end face of the housing pin 24 facing the cylinder core 20 slides over the end face of the head 30. For this purpose, the tip 29 must be supported on the scanning point 7.

The position of the radial bore 27, which extends transversely to the core pin bore 26, has a distance k from the opening 32, with which the core pin bore 26 opens into the bearing bore 19. The sum of the distances k and t corresponds to the diameter of the cylinder core 20. There is at least one core pin 23 which is longer than the distance k.

With a mating key inserted into the keyway 21, the complementary tumbler pin 28 is held in a proper position in which a portion of the outer surface of the head 30 lies in the cylinder jacket plane of the cylinder core 20. When the cylinder core 20 is rotated, a portion of the outer surface of the head 30 slides over the housing pin 24. The housing pin 24 can not enter the portion 27 "of the core bore 27.

However, if a key without rib 16 is inserted into the keyway 21, so after a 90 ° rotation in the clockwise direction in FIG. 6 achieved operating position achieved. In this position, the housing pin 24 can enter and be caught in the core bore 27 ", and the core can not be further rotated from this position.

Will the in the FIG. 1 shown key modified so that the coding recess 6b is deepened so that the two edges 11 'meet in a vertex 6', which is removed by the measure s from the back 3, so this key has no sampling 7 more. She was in the distant material. When attempting to operate the lock cylinder with such a prepared key or a key in which all the code cuts 6a to 6f have been cut to the dimension s or r, the supplementary tumbler pin 28 can not be brought into the proper position as described above become.

If the impact-opening method is used with such a prepared key and the housing pins 24 are displaced into a release position, then the cylinder core 20 can indeed be rotated by 90 ° into the in FIG. 8 shown position to be rotated. However, since the complementation pin 28 is not held in its proper position, the head 30 can enter the core bore 27 " 24, once the housing pin bore 31 has been brought into alignment with the catch hole forming core bore 27 ".
In one embodiment, not shown, the catch bore 27 "may be formed so that the housing pin 24 entering into the catching bore 27 merely exerts a further rotational locking function. By forming a slope or the like, the cylinder can then be turned back again.

Claims (6)

1. Locking arrangement having a lock cylinder (17) and a matching key (1), wherein the key (1) having a flat key bit (2) with a narrow spine (3), two broad sides (4) which run substantially parallel to one another, and coding notches (6a to 6f) on the front (5) formed on peripheral edge (11) running obliquely to an apex, which is opposite the spine, at coding positions (a to f) on the key bit; the lock cylinder (17) having a cylinder housing (18), a cylinder core (20) which is mounted in a bearing hole (19) in the cylinder housing (18) and has a keyway (21) for insertion of the key bit (2), tumblers (23) which are located in core pin holes (26), interact with the coding notches (6a to 6f) on the key bit, and are disposed at coding positions on the cylinder, said coding positions coinciding with coding positions (a to f) on the key bit when the locking bit (2) is inserted as far as a stop (9) in the keyway (21), and a sensing member (28) which is located in a supplementary core hole (27) that extends transversely relative to the core pin holes (26) and senses a sensing point (7) on a broad side of the key, the spacing (t), from the spine (3), of the sensing point (7) on a broad side of the key being greater than the spacing (s), from the spine (3), of the apex of the coding notch (6d), whereby the supplementary core hole (27) is located between two immediately adjacent core holes (26) and the sensing member (28) has a tip (29) by means of which the sensing point (7) on a broad side of the key situated between two immediately adjacent coding positions (6b, 6c) is sensed, characterized in that the sensing point (7) being situated close to a peripheral edge (11) of a coding notch (6d) which is cut-in to a lesser extent than the coding notch (6b) that is cut-in to the deepest extent in such a way that deepening by grinding or milling, of the coding notch (6d) which is cut-in to a lesser extent, to the depth of the coding notch (6d) that is cut-in to the deepest extent leads to disappearance of the sensing point (7), so that the sensing member sensing the sensing point (2) is not held in a proper position by a portion of the key width side.
2. Locking arrangement according to Claim 1, characterized in that the sensing point (7) is associated with a profiled rib (16).
3. Locking arrangement according to one of the preceding claims, characterized in that the sensing member (28) is a pin which is guided in the core hole (27), at least regions of the head (30) of said pin opposite from the tip (29) being situated in an opening (27") which can be brought into an overlapping position with respect to a housing-pin hole (31) and has a shape in cross-section that allows entry of the housing pin (24) disposed in the housing hole (31).
4. Locking arrangement according to one of the preceding claims, characterized in that, when the sensing point (7) disappears or when the key width is reduced in the region of the sensing point (7), a housing pin (24) which is mounted in a housing-pin hole (31) butts against a blocking step or is captured, when the cylinder core (20) rotates.
5. Locking arrangement according to one of the preceding claims, characterized in that, the spacing (k) of the sensing end (29) of the sensing member (28) from the opening (32) in the bearing hole for the core pin hole (26) being less than the length of the longest core pin (23).
6. Locking arrangement according to one of the preceding claims, characterized in that the sensing member (28) is a pin which is guided in a core hole (27), at least regions of the head (30) of said pin opposite from the tip (29) being situated in an opening (27"), which is open at the bearing-hole end and can be brought into an overlapping position with respect to a housing-pin hole (31), and has a shape in cross-section which allows entry of the housing pin (24) that is disposed in the housing hole (31), the pin (28) which is held by the sensing point (7) preventing entry of the housing pin (24) into the opening (27") by way of the end face of the head (30) of said pin in the cylindrical lateral surface of the cylinder core (20).

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