EP2452030B9 - Lock cylinder and matching key - Google Patents

Description

The invention relates to a lock cylinder according to the preamble of claim 1.

The invention also relates to a locking device consisting of a lock cylinder and a matching key.

A generic lock cylinder describe the US 2005 / 0061043A1 and US 4,756,177 , Described there is a lock cylinder with a feeler member, which is designed as rotatably arranged in a bearing opening of the cylinder core pin from which an arm projects into the keyway to scan a running in a shank of the key shell profile, which defines the axial position of the pin becomes. The stylus is acted upon in the axial direction by a helical compression spring and has on its side facing away from the sensing arm a recess for the entry of a projection of a locking member.

A lock cylinder with matching key is from the DE 30 24 929 described. The lock cylinder has a cylinder housing which has a bearing bore in which a cylinder core rests, which can be rotated by insertion of a matching key in the keyway of the cylinder core to rotate a coupled to the insertion of the key with the cylinder core closure member with which a lock is operable. If the key is not inserted, the cylinder core is locked by tumblers. A plurality of tumblers each having a housing pin and a core pin is located in pin bores of a profile section of the cylinder housing, these pin bores being aligned with core pin bores of the cylinder core. When the key is not inserted, the housing pins intersect the parting line between the cylinder core and the cylinder housing. In the generic cylinder core is a cylindrical sensing element, which in the axial direction is relocatable. The feeler is held by a spring in a locking position in which it prevents a displacement of a locking bar designed as a blocking member in a release position. If the appropriate key is inserted into the keyway, not only the tumbler pins are sorted in such a way that the housing pins no longer intersect the parting line. When inserting the appropriate key and the feeler is shifted to a release position. The feeler member thereby scans a profile rib of the key with its end face opposite the spring-loaded face. When fully inserted key, the feeler has been moved to such a position in which the locking member can escape into a cylinder core unlocking position. The cylinder core can now be turned.

The DE 16 78 096 C3 describes a lock cylinder with a cylinder housing and a rotatably mounted in a bore of the cylinder housing cylinder core. The latter has a key channel into which a key can be inserted. The key shaft of the key has slots for sorting core pins. The core pins have roof-first trained heads that can enter into oblique grooves of the key shank and thereby obtain a defined rotational position. The inserted matching key gives the core pins such a rotational position that projections of a locking member can enter into radial recesses of the core pins, so that the non-inserted key locking a blocking of the cylinder core causing locking member can dodge radially inwardly unlocking the rotation of the cylinder core position.

The DE 36 09 473 A1 describes a lock cylinder in which the cylinder core is locked in rotation by means of a two-armed locking lever which is pivotable by insertion of a matching key in an unlocking position. The lever is acted upon by a compression spring and controlled by a profiling the Schlüsselbreitseite scanning stylus.

The invention has for its object to improve the locking security of a lock cylinder.

The object is achieved by the invention specified in the claims. The head of the feeler member forms a support flank, on which the spring is supported, which is rotated when the key is pulled out of the keyway in the locked position, the feeler. From this shaft protrudes a sensing arm. The probe arm scans the profiling of the key. When inserting the matching key, the probe arm slides along the key shaft and receives a defined rotational position when the key is fully inserted. The probe arm rests against a contact flank of the key shank. The position of the abutment edge defines the rotational position of the shaft. The fully inserted into the keyway matching key gives the shaft such a rotational position that the locking member can escape to its unlocking position. For this purpose, the feeler member has a recess which is preferably arranged on the side facing away from the sensing arm side of the shaft. In this recess, a projection of the locking member can dip when the recess is aligned with the projection. When not inserted key or a non-closing inserted key, the recess is not aligned with the projection. In front of the projection is rather a locking edge, which prevents a radial deflection of the locking member. The blocking edge is adjacent to the recess. The recess is preferably formed by a radial recess of the shank whose outline contour is only slightly larger than the outline contour of the associated projection of the locking member. A rotational position of the shaft thus causes the projection can not dip into the radial recess. The radial recess adjacent wall the shaft thus forms the blocking edge, which lies in the blocking position of the feeler member in front of the projection and which holds the locking member in the blocking position. The probe arm is formed by a arranged at the end of the shaft head of the feeler member. This head also forms a supporting flank, on which an arm of a leaf spring is supported, which holds the feeler member in a blocking position or shifted back to a rotation of the shaft after deduction of the key back into the blocking position. The cylinder core has radial recesses. Such a recess forms a pocket in which the locking member rests, which is preferably formed by a locking bar. The locking bar has obliquely extending locking flanks, which abut in the blocking position of the locking member on obliquely extending side walls of a locking groove of the cylinder housing. If the cylinder core is rotated in the release position located Tastgliedern, so the locking edges can slide off each other, which has a Radialeinwärtsverlagerung the locking member result. This is done against the restoring force of a return spring, which otherwise acts on the locking member in the direction of the locking groove. The locking bar has a projection in the region of each of its two ends. Each projection is assigned a probe. Preferably, the cylinder core has two diametrically opposed locking members, which are each assigned one, preferably two feeler members, so that not only the presence of one, but also two opposing ribs of the key shank can be scanned with the feeler arms of the feeler members. Each of the opposing profile ribs of the key shank but also has depressions that form contact edges. The flanks extend obliquely to the insertion of the key, so that the sensing elements occupy only their release position when the key has been fully, that is inserted into a key position in the keyway. For this purpose, the key shank has a stop which abuts against the key insertion side end face of the cylinder core. The double-acting required confirmation of each two sensing elements can preferably be used to interrogate, for example, the correct presence of a brand protection Überfräsung the key tip.

The precise arrangement and design of the system edges for the locking member arms within the confirmation rib results in a high protection against copy milling.

Fig. 1

eine Explosionsdarstellung eines erfindungsgemäßen Schließzylinders mit passendem Schlüssel;

Fig. 2

eine vergrößerte Explosionsdarstellung des Zylinderkernes;

Fig. 3

die Breitseitenansicht eines Schließzylinders, bei dem zur Erläuterung der Erfindung unwesentliche Teile weggelassen sind und in den ein Schlüssel eingesteckt ist;

Fig. 4

eine Schnittdarstellung gemäß der Linie IV -IV in Figur 3 mit nicht eingestecktem Schlüssel;

Fig. 5

eine Schnittdarstellung gemäß der Schnittlinie V - V in Figur 3 mit nicht eingestecktem Schlüssel;

Fig. 6

eine Schnittdarstellung gemäß der Schnittlinie VI - VI in Figur 3 mit nicht eingestecktem Schlüssel;

Fig. 7

eine Darstellung gemäß Figur 4 mit eingestecktem Schlüssel;

Fig. 8

eine Darstellung gemäß Fig. 5 mit eingestecktem Schlüssel und

Fig. 9

eine Darstellung gemäß Figur 6 mit eingestecktem Schlüssel.

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

Fig. 1

an exploded view of a lock cylinder according to the invention with matching key;

Fig. 2

an enlarged exploded view of the cylinder core;

Fig. 3

the broad side view of a lock cylinder, are omitted in the explanation of the invention non-essential parts and in which a key is inserted;

Fig. 4

a sectional view along the line IV -IV in FIG. 3 with key not inserted;

Fig. 5

a sectional view along the section line V - V in FIG. 3 with key not inserted;

Fig. 6

a sectional view along the section line VI - VI in FIG. 3 with key not inserted;

Fig. 7

a representation according to FIG. 4 with key inserted;

Fig. 8

a representation according to Fig. 5 with inserted key and

Fig. 9

a representation according to FIG. 6 with inserted key.

The FIG. 1 shows the cylinder housing 1 without inserted therein cylinder core 2. The cylinder core 2 is rotatably mounted in the mounted state in a bearing bore 3. In the embodiment, it is a double cylinder with an arranged between two bearing holes 3 incision 4 for receiving a closing member, not shown in the drawings, which is rotatably coupled to the cylinder core 2 to actuate by turning the cylinder core 2 a lock.

In the drawings, moreover, the usual tumbler pins, each consisting of a core pin and a housing pin, which einfeder spring in pin holes, not shown. The latter interact with breasts cut into the key shank 6 of a key 5 indentations.

The cylinder core 2 has a keyway 7 equipped with grooves and ribs for inserting a correspondingly profiled shank 6 of a key 5. Profile ribs 17 extend in the insertion direction of the key shank 6. For a proper closing of the lock cylinder, the key 5 is inserted into a stop position in which a stop 30 of the key 5 on a counter-stop 31, which is formed by the end face of the cylinder core 2, rests.

As in particular the Figures 2 and 6 can be seen, the cylinder core 2 has diametrically opposite, extending in the direction of extension of the cylinder core 2 pockets 22. This, to the outer surface of the cylinder core 2 open pockets 22 form storage pockets for each locking member thirteenth

The locking member 13 forms an elongated locking bar 14, the inclined edges 14 'is formed. The inclined flanks 14 'are in a blocking position of the locking member 13 on inclined flanks 28' of a locking groove 28, which is formed by the wall of the bearing bore 3. On its side opposite the oblique edges protrude from the locking bar 14 from two projections 15, which are located in the region of the respective end of the locking member 13.

From the FIG. 5 It can be seen that in each case a compression spring 16 is supported on the bottoms of two recesses 26 arranged between the projections 15. The other ends of the compression springs 16 are inserted into recesses 27, which are formed from the bottom of the bag 22. The springs 16 act on the locking member 13 in the direction of a blocking position in which the locking bar 14 rests in the locking groove 28.

To each pocket 22 correspond two further recesses 19 which extend parallel to the pockets 22. In the walls of the recesses 19 are bearing bores 20 which extend parallel to each other and extend parallel to the walls of the keyway 7. The bearing bores 20 also extend transversely to the insertion direction of the key, that is to the extension direction of the key channel. 7

In the bearing bores 20, the shafts 11 of Tastgliedern 9 are rotatably mounted. In order to equip the cylinder core 2 with the Tastgliedern 9, 20 aligned mounting recesses 21 are provided to the bearing holes, through which the heads of the sensing elements 9 pass through when trained by the heads Tastarme 10 are brought into a corresponding rotational position.

The shanks 11 protrude beyond the bearing pocket 22 out into extensions of the bearing bores 20 such that radial recesses 12 of the shanks 11 in the region of Storage bag 22 are. The radially projecting feeler arms 10 dive when not keyed inserted (see FIG. 4 ) in the key channel 7. As from the FIG. 5 can be seen, lie in this position, the radial recesses 12 of the shafts 11 except escape position to the projections 15, so that the projections 15 can not dip into the radial recesses 12. This causes the locking members 13 are held in their locking the rotation of the cylinder core 2 blocking blocking position. The areas next to the radial recesses 12 of the shaft 11 thus form locking edges against which abut against the projections 15 during a rotation test.

The positioning of the sensing elements 9 in the blocking position ( FIG. 4 ) takes place by means of a leaf spring 8. A central portion of the leaf spring 8 lies in a bearing slot 24 which is located between two recesses 19. The two Z-shaped end sections 8 "projecting from the middle section 8 abut on approximately the center of rotation passing rectilinearly extending support flanks 23 of the feeler member 9. The support flanks 23 are formed by the bottoms of grooves extending in the head of the feeler member 9 on the Rear of the Tastarmes 10 are located.

• Bei nicht eingeschobenem Schlüssel (vergleiche Figuren 4 bis 6) ragen die Tastarme 10 der insgesamt vier Tastglieder 9 in den Schlüsselkanal. Der Abstand zweier sich gegenüberliegender Tastarme 10 ist geringer als der Abstand zweier dortiger Rippen 17 eines Schlüsselschaftes 6. Die Radialaussparung 12 eines jeden Schaftes 11 liegt außer Fluchtlage zum zugeordneten Vorsprung 15 des Sperrgliedes 13, so dass sich das Sperrglied 13 nicht aus der in Figur 6 dargestellten Blockierstellung verlagern kann, wenn der Zylinderkern 2 gedreht wird.

The operation of the lock cylinder is the following:

• When not inserted key (see FIGS. 4 to 6 ) protrude the probe arms 10 of the total of four sensing elements 9 in the keyway. The distance between two opposing sensing arms 10 is less than the distance between two local ribs 17 of a key shank 6. The radial recess 12 of each shaft 11 is out of alignment with the associated projection 15 of the locking member 13, so that the locking member 13 is not from the in FIG. 6 shown blocking position can shift when the cylinder core 2 is rotated.

The corresponding key 5 has a key grain and a protruding from the key ridge key shank 6. Along the key shank 6 extend the profile ribs 17. In areas that are assigned to fully in the keyway 7 key shaft 6 the feeler arms 10 locally, have the profile ribs 17 recesses 29. The edges of the recesses 29 form obliquely to the insertion of the key 5 in the keyway 7 extending contact edges 18th

Is the matching key completely inserted into the cylinder core 2, as is the FIGS. 6 and 8th show, the probe arms 10 engage in the recesses 29 a. The key tip-side recess has only a single wall, which forms a contact edge 18, against which a probe arm 10 is applied. In the fully inserted key position, in which the stop 30 is located on the counter-stop 31, the feeler members 9 receive by conditioning their Tastarme 10 at the respective abutment edge 18 a defined rotational position.

The FIG. 8 shows that in this rotational position, the radial recesses 12 are aligned with the projections 15.

Is starting from this position, the cylinder core 2 is rotated slightly by turning the key 5, as is the FIG. 9 shows, so the projections 15 can dip into the radial recesses 12. This is done by sliding together the inclined edges 14 'of the locking bar 14 on the inclined edges 28' of the locking groove 28. In this case, the locking bar 14 is completely shifted out of the locking groove 28.

If the cylinder core 2 brought back into a key withdrawal position, the key 5 can be pulled out of the keyway 7. The spring 8 rotates the sensing members 9 back into the blocking position in which the radial recesses 12 are no longer in alignment with the projections 15. With the compression springs 16, the locking member 13 is brought back into the blocking position, in which the locking bar 14 rests in the locking groove 28.

A key without recesses 29, but with a rib profile, which corresponds to the cross-sectional profile of the key channel 7, although can be inserted into the keyway 7. If this key also has the correct breast-side indentations, the pin tumblers, not shown, are brought into an open position with this key. The feeler members 9 are rotated beyond their release position, so that the radial recesses 12 are not aligned with their associated projections of the locking bar 14. The projections 15 of the locking bar are rather opposed by the edges of the radial recesses 12 formed locking edges, which prevent a displacement of the locking bar 14 in its release position. Not only recesses in the key broadside, that is to say in particular the previously discussed recesses in a key rib, can be scanned with the feeler elements. In the simplest case, one of the probing elements described above can also be used to scan the presence of a rib with a specific rib height. A rib having an insufficient rib height will not be able to turn the feeler into the release position. A higher rib rotates the feeler beyond the release position.

Claims (13)

1. Lock cylinder comprising a cylinder core (2) which has a key channel (7) for insertion of a key (5) that is provided with a profiling (18), the lock cylinder also comprising at least one feeler member (9) disposed in the cylinder core (2) and acted on by a spring (8), the feeler member being held by the spring (8) in a blocking position when a key (5) is not inserted into the key channel (7), and the lock cylinder further comprising a blocking member (13) which is held in a blocking position that blocks rotation of the cylinder core (2) when the feeler member (9) is in its blocking position, the feeler member (9) being drivable against the return force of the spring (8) into a release position by the profiling (18) of the matching key (5) when this key is inserted into the key channel (7), in which release position the blocking member (13) can be displaced into a position in which it unblocks the cylinder core (2), the feeler member (9) having a feeler arm (10) for sensing the profiling (18), the arm projecting radially from a shank (11) that is mounted rotatably in the cylinder core (2), the arm being formed by a head of the feeler member disposed at one end of the shank (11) and being acted on when the matching key (5) is inserted in such a way that the shank (11) rotates about its axis into the release position, characterized in that the head (10) forms a supporting flank (23) on which the spring (8) is supported, the spring turning the feeler member (9) into the blocking position when the key (5) is withdrawn from the key channel (7).
2. Lock cylinder according to Claim 1, characterized in that the spring is a leaf spring and a central portion (8") of the leaf spring (8) lies in a bearing slot (24) of the cylinder core (2) between two recesses (19), and, from the central portion (8"), two end portions (8') project and engage against supporting flanks (23) of two feeler members (9), the supporting flanks running approximately in a straight line and going through the centre of rotation.
3. Lock cylinder according to any of the preceding claims, characterized in that the supporting flanks (23) are formed by the bases of grooves, which are in the head of the feeler member (9) at the rear of the feeler arm (10).
4. Lock cylinder according to any of the preceding claims, characterized in that the leaf spring (8) has a substantially Z-shaped configuration.
5. Lock cylinder according to any of the preceding claims, characterized by a cut-out (12) disposed on the side of the feeler member (9) that faces away from the feeler arm (10), into which cut-out a projection (15) of the blocking member (13) can enter in the release position, and a blocking flank lying adjacent to the cut-out, the blocking flank lying in front of projection (15) in the blocking position.
6. Lock cylinder according to any of the preceding claims, characterized in that the feeler member (9) has, at the end of the shank (11) that acts a rotary bearing, the head that forms the feeler arm (10).
7. Lock cylinder according to Claim 5, characterized in that the cut-out (12) is formed as a radial recess in the shank (11) and the blocking flank is formed by the wall of the shank (11).
8. Lock cylinder according to any of the preceding claims, characterized in that the direction of the rotational axis of the shank (11) runs transverse to the direction of extent of the shank (6) of the key (5) and parallel to the plane of the wide side of the key.
9. Lock cylinder according to any of the preceding claims, characterized in that blocking member (13) is a blocking bar (14) that extends in the direction in which the key is inserted and is enclosed in a pocket (22) of the cylinder core (2), the blocking bar having a projection (15) in the region of each of its ends, each of which projections interacts with a feeler member (9).
10. Lock cylinder according to any of the preceding claims, characterized by two substantially oppositely-disposed blocking members (13), each of which respectively interacts with at least one, preferably two, feeler members (9).
11. Locking device comprising a lock cylinder according to any of the preceding claims, characterized by a matching key (5) which has a rib (17) on the wide side of its key shank (6), the rib being sensed by the feeler arm (10) when the shank (6) of the key is inserted into the key channel (7).
12. Locking device according to Claim 11, characterized in that the profiling is formed by an abutment flank (18) that runs transversely or obliquely with respect to the direction of insertion, the feeler arm (10) engaging against this abutment flank when the key (5) is inserted fully into the key channel (7).
13. Locking device according to Claim 12, characterized in that the abutment flank (18) is a wall of a depression (29), in particular in a rib (17) of the key shank (6).

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