EP1726749B1 - Cylinder lock with a key - Google Patents

Abstract

A lock system has a cylinder core with a key that is inserted in a keyhole where it comes into contact with sliding pins. The key has a groove with a control ramp that raised the pins on insertion of the key. The pins have symmetrical conical tips (22) making contact with the moving key.

Description

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

From the DE 3832143 C2 a lock cylinder with a key is known in which the core pins have a flat rib. Side of the flat rib are control slopes, which can attack a flank of a key. The key is designed such that it first acts on the control slopes and after a certain displacement only on the flank of the cylinder pin and this completely shifted. The flat rib of the core pin is guided in an inlet groove of the key. It is only possible to relocate the pin tumbler to a release position if one has a proper key having the control zone to attack the ramps. Otherwise it is not possible to relocate the pin tumbler to a release position. The pins must not turn.

From the DE 102004003034 a lock cylinder is described with a key whose core pins have a cross-section reduced cylinder portion. This cylinder section can tie an unlocking element in the lock cylinder. Such an unlocking element, which is needed for the percussion method, has deeper cuts than provided for the system. Due to the deeper cuts arise in the unlocking, in the area of the reduced-height portion of the deep rib holes. In these holes, the cylinder portion of the core pin can enter and captivate the unlocking. Now it is no longer possible to push the unlocking further into or out again. The lock cylinder is thus protected from the percussion method and can not be opened by this method. Furthermore, essentially the Core pins and the key as configured in the aforementioned document.

The US 5,438,857 describes various key profiles with grooves and ribs, wherein the slots adjacent to the insertion side end faces of the ribs are chamfered to lift the tumbler pins during insertion of the key in the keyway of the lock cylinder. From the edge side of a chamfer surrounding end faces of the substantially cylindrical tumbler pins project pedestal-like extensions. One of the key profiles proposed there provides a high rib embedded in a groove, which forms an oblique face along which the extension of the tumbler pin slides when the key is inserted. In another key profile, the extension dips through the groove. There, the chamfer forming the edge of the front side slides along the inclined edges.

The invention has for its object to simplify hertellungstechnisch a generic lock cylinder with a key.

The problem is solved by the invention defined in claim 1.

Preferably, the cross-sectional shape of the control flanks is adapted to the control zones. The control zones essentially slide off in the line system on the control flanks. These have a rounded shape. The tip of at least one core pin forms a cylindrical extension. The bottom of the keyway has recesses for entry of the tip or cylindrical extension of the at least one core pin. The bottom of the channel forms a ramp for the tip of the core pin. This occurs only after an initial shift by the control edges against the ramp. The key is designed as a reversible flat key. A plurality of in the insertion direction of the key one behind the other core pins arranged in the lock cylinder. One or more core pins form at their tips cylindrical extensions. The ramp is associated with a Tiefrippe and a high rib of the key. The ramp extends over substantially the entire key thickness. The bottoms of two grooves flanking a high rib are assigned the control edges. These can also be assigned to the oblique walls of a deep rib. The control zones and the ramps have different angles to the key channel plane. The axial length of the control zones is slightly greater than the rib height of a tie rib associated with the bottom of the channel, but less than the pitch of the top surface of the tie rib to the bottom of a groove adjacent the tie rib.

Fig.1

einen Schlüssel in einer perspektivischen Ansicht,

Fig. 2

eine Ausschnittsvergrößerung der Schlüsselspitze entsprechend des Ausschnitts II aus Fig.1,

Fig. 3

eine Ansicht auf die Schlüsselspitze in Blickrichtung III aus Fig.1,

Fig. 4

eine perspektivischer Halbschnitt eines Zylinderkerns mit den Kernstiften und einem Zusatzstift,

Fig. 5

eine Ansicht des Zylinderkerns entsprechend der Blickrichtung V aus Fig. 4, jedoch greifen die Steuerflanken der Schlüsselspitze an den Steuerzonen des ersten Kernstifts an,

Fig. 6

eine Seitenansicht gemäß der Blickrichtung VI aus Fig. 5,

Fig. 7

eine perspektivische Ansicht des Schlüssels mit dem ersten Kernstift,

Fig. 8

eine Ausschnittsvergrößerung entsprechend des Ausschnitts VIII aus Fig. 7,

Fig. 9

eine ähnliche Darstellung wie Fig. 5, jedoch greift jetzt die Auflaufschräge der Schlüsselspitze an der Spitze des ersten Kernstiftes an,

Fig. 10

eine ähnliche Darstellung wie Fig. 7, jedoch in der Stellung, die in Fig. 9 verdeutlicht ist,

Fig.11

eine Ausschnittsvergrößerung entsprechend des Ausschnittes XI aus Fig. 10,

Fig. 12

eine Ansicht entsprechend der Fig. 5, jedoch greift die Schlüsselspitze mit ihren Steuerflanken an einem anderen Kernstift an, der einen zylindrischen Fortsatz ausbildet,

Fig. 13

eine Ansicht entsprechend der Fig. 7, jedoch mit dem anderen Kernstift und in der Stellung, die in Fig. 12 verdeutlicht ist,

Fig. 14

eine Ausschnittsvergrößerung entsprechend des Ausschnittes XIV aus Fig. 13,

Fig. 15

eine Ansicht entsprechend der Fig. 12, jedoch greift jetzt die Auflaufschräge der Schlüsselspitze an dem zylindrischen Fortsatz des Kernstiftes an,

Fig. 16

eine ähnliche Darstellung wie Fig. 13, jedoch in der Stellung, die in Fig. 15 verdeutlicht worden ist und

Fig. 17

eine Ausschnittsvergrößerung entsprechend des Ausschnittes XVII aus Fig. 16.

The invention described above will be explained in more detail with reference to several embodiments. Show it:

Fig.1

a key in a perspective view,

Fig. 2

a detail enlargement of the key top according to the clipping II Fig.1 .

Fig. 3

a view of the key tip in the direction of III from Fig.1 .

Fig. 4

a perspective half section of a cylinder core with the core pins and an additional pin,

Fig. 5

a view of the cylinder core according to the viewing direction V from Fig. 4 but the control flanks of the key tip engage the control zones of the first core pin,

Fig. 6

a side view according to the viewing direction VI Fig. 5 .

Fig. 7

a perspective view of the key with the first core pin,

Fig. 8

an enlarged detail corresponding to the section VIII Fig. 7 .

Fig. 9

a similar representation as Fig. 5 but now the run-on slope of the key tip engages the tip of the first core pin,

Fig. 10

a similar representation as Fig. 7 , but in the position in Fig. 9 is clear

Figure 11

a detail enlargement corresponding to the section XI Fig. 10 .

Fig. 12

a view corresponding to the Fig. 5 However, the key tip attacks with its control edges on another core pin, which forms a cylindrical extension,

Fig. 13

a view corresponding to the Fig. 7 but with the other core pin and in the position in Fig. 12 is clear

Fig. 14

a detail enlargement corresponding to the section XIV Fig. 13 .

Fig. 15

a view corresponding to the Fig. 12 , but now the ramp of the key tip engages the cylindrical extension of the core pin,

Fig. 16

a similar representation as Fig. 13 , but in the position in Fig. 15 has been clarified and

Fig. 17

an excerpt from the section XVII Fig. 16 ,

Fig.1 shows a key 1 in a perspective view looking towards the key tip. The key 1 is designed as a reversible flat key. This forms a key handle 2 and a key shank 3. The key shank 3 is profiled and has on each of its broad sides a high rib 4 and a tie bar 5 arranged parallel thereto. As in Fig. 6 can be seen, the profiled key shank 3 a key channel 11 of a cylinder core 7 is shaped. Since it is a turning flat key, the high rib 4 of the one broad side is compared with a deep rib 5 of the other broad side. The raised rib 4 has cone-shaped depressions 6, which are arranged one behind the other in a key-member extension direction. The number of reductions 6 is adapted to the number of pin tumblers. The sinking depth of the counterbores 6 is dependent on the pin tumblers. When inserted key 1 in a cylinder core 7 must be ensured that the parting plane of the tumblers on the lateral surface of the cylinder core 7 is. Only then is a turning of the cylinder core 7 in a lock cylinder, not shown, possible. Here in the embodiment, only one possible variant is shown.

The deep rib 5 has a step 8. This goes into a reduced height tufa region 5 'over. Before level 8 in the direction of the key tip a countersink 9 is incorporated. In the countersink 9, an additional pin 10 reach into it.

In Fig. 2 the key tip is enlarged in a detail. There it can be seen that starting from the deep rib 5 to the high rib 4, a channel 12 runs. The channel 12 extends at an acute angle from the tie bar 5, in the direction of the key handle 2 to the high rib 4. The bottom of the channel 12 forms a ramp 13 for a tip 14 of a core pin 15 or the tip 16 of the cylindrical extension 17 of a core pin 18. The run-up slope 13 is concavely rounded and is thus adapted to the displacement path of the tips 14,16. Furthermore, the run-on slope 13 of the tie-bar 5 and also the high-rib 4 is assigned. The ramp 13 extends substantially over the entire key shank thickness.

The key tip forms a fork opening 19. With this fork opening 19, the key tip can project around the cylindrical extension 17 of the core pin 18.

Each side of the high rib is a groove 20. The two grooves 20 flank the high rib 4. The bottoms of the grooves 20 each have a control edge 21 assigned. Thus, the control edges 21 are also assigned to the oblique walls of the tie rib 5. The control flanks 21 have a rounded shape and are thus adapted to the shape of the control zones 22 of the core pins 15, 18.

In the Fig. 4 the cylinder core 7 is shown in section. It is good to see that several core pins 15, 18 are arranged one behind the other. These are in Schlüsseleinsteckrichtung behind the other. The core pin 15 has a circular cylindrical basic contour. The control zone 22 is formed by a conical end. The conical end of the core pin 15 protrudes into the keyway 11. The core pins 15 have different lengths. Furthermore, a core pin 18 is disposed in the cylinder core 7. The core pin 18 also has a tapered end. This forms the control zone 22. On the conical end, a cylindrical extension 17 is arranged. This has a smaller cross-section than the core pin 18. The lower end of the core pin 18 of this forms a conical portion 23 from.

This then passes into a section 24, which is the form of the basic contour of the core pin 18.

In the cylinder core 7 15.18 core pin holes 25 are provided for the core pins. These run at a right angle to the direction of the keyway 11. The core pin holes 25 are in the Fig. 4 arranged below the keyway 11. Above the keyway 11 additional holes 26 are arranged. The additional bores 26 have at their upper end an enlarged diameter portion 27. In one of the additional bores 26 is an additional pin 10 a. The additional pin 10 also has a larger diameter portion 28 at its upper end. At the end of the section 28, a cone section 29 is arranged. The section 28 is adapted to the section 27 of the additional bore 26. At its lower end, the additional pin 10 forms a further cone section 30. The additional holes 26 are slightly offset from the core pin holes 25. Thus, the spaces between the additional holes 26 provide a contact surface 31 for the core pins 15. For the cylindrical portion 17 of the core pin 18, a recess 32 is incorporated in the cylinder core 7. The recess 32 is adapted to the cylindrical portion 17 of the core pin 18. Thus, the control zones 22 of the core pins 15, 18 are at the same height level with the key 1 not inserted.

The core pins 15, 18 are designed rotationally symmetrical. Due to the rotationally symmetrical shape of the core pins 15, 18 a more cost-effective production is achieved.

The incorporated on the key tip bevel 13 and the control edges 21 may have a different angle to the key channel level. By different angles to one another it is achieved that the core pin 15,18 moves depending on the angle at different speeds with the same insertion speed of the key 1. For example, the Control edges 21 have a more acute angle to the key channel plane than the ramp 13. This design ensures that the core pins 15,18 are slowly displaced at the beginning and thus tilting of the core pins 15,18 in the cylinder core 7 is prevented. Sliding the core pins 15, 18 then on the ramp 13, so they shift faster.

In Fig. 6 is well illustrated that the axial length a of the control zone 22 of the core pins 15, 18 is slightly larger than the rib height b of the base 33 of the keyway 11 associated Tiefrippe 5. The axial length a of the control zone 22 is less than the distance c of the vertex surface 34 of the tie rib 5 to the bottom of the tie rib 5 adjacent groove 20th

The following mode of action occurs:

Starting from the Fig. 4 are the core pins 15,18 and the additional pin 10 in its normal position. The core pins 15,18 are part of a tumbler, which is not shown here. To the tumbler still include housing pins, which are acted upon by springs. The springs act in the direction of the key channel 11. In this position, the housing pins would secure the cylinder core 7 against rotation. Only by a suitable key 1, it would be possible to relocate the core pins 15, 18 and the housing pins, not shown, such that the parting plane between the core pins 15,18 and the housing pins is aligned with the lateral surface of the cylinder core 7. Then it is only possible to turn the cylinder core.

In the Fig. 5 the key 1 was inserted into the keyway 11 far enough that the control flanks 21 rest against the control zones 22 of the first core pin 15. The control zones 22 are essentially in line with the control flanks 21. Due to the line system of the control zones 22 on the control flanks 21, a lesser wear of the core pins 15 is achieved. Now, if the key 1 is further inserted into the key channel 11, Thus, the core pin 15 moves out of the keyway 11 addition. At the beginning of its displacement of the core pin 15 is only mediated by the interaction of the control edges 21 and the control zones 22. After a certain displacement of the core pin 15, the position is reached in the FIGS. 9 to 11 has been shown. Now, the core pin 15 by means of the ramp 13 is further displaced from the keyway 11. The tip 14 of the core pin 15 runs on the ramp bevel 13 from.

As in the FIGS. 12 to 14 can be seen, are now the control edges 21 at the control zones 22 of the core pin 18 at. The cylindrical portion 17 lies in the fork opening 19 a. After a certain displacement of the core pin 18 now slides the tip 16 of the cylindrical portion 17 on the ramp 13 from (see FIGS. 15 to 17 ).

Now, if the key 1 is completely inserted into the keyway 11, the core pins 15, 18 shift so that each tip 14, 16 rests in a matching countersink 6 of the key shank 3. The cone portion 30 of the additional pin 10 is then in the reduction 9 of the opposite tie rib 5 a. Now, as in the DE 102004003034.0 the recesses 6 incorporated deeper than the maximum depth of the system, so by the reduced Tiefrippenbereich 5 ', a through hole in the key shank 3. In this through hole, the cylindrical portion 17 of the core pin 18 can enter and tie the key that is needed for percussion. Turning the cylinder core 7 is no longer possible.

Due to the rotationally symmetrical design of the core pins 15, 18 ensures that they can be produced more cheaply and the designated core pin holes 25 no longer needs to be adapted for the profile cross section of the other core pins. Likewise, it no longer needs to be taken to ensure that the core pins 15, 18 are inserted in a specific position relative to the core pin bores 25. Since the core pins 15,18 no Bridge more training, these are designed more stable. Due to the line system of the control zones 22 on the control flanks 21 a lesser wear is achieved.

Claims (14)

1. Cylinder lock with a key (1), it being possible to insert the key (1) into a key channel (11) of a cylinder core (7) of the cylinder lock, into which key channel (11) the control end of at least one core pin (15, 18) of a pin tumbler projects, and the key having, on the tip thereof, two control flanks (21) which are spaced apart by a channel (12) and, when the key (1) is inserted, act on two control zones (22) of the control end which are located near the tip (14, 16) of the control end in order to displace the core pin (15, 18), the base of the channel (12) forming a lead-in bevel (13) for the tip (14,16) of the core pin (15, 18), which lead-in bevel is contacted by the tip (14, 16) when the key of the core pin (15, 18) is inserted, only after an initial displacement of the core pin caused by the control flanks (21) acting on the control zones (22), characterised in that the control zones (22) are portions of a rotationally symmetrical surface, in particular an outer surface of a cone or a dome around the tip (14, 16) of the rotationally symmetrical core pin (15, 18).
2. Cylinder lock according to claim 1, characterised in that the cross-sectional shape of the control flanks (21) is adapted to the shape of the control zones (22).
3. Cylinder lock according to either of the preceding claims, characterised in that the control zones (22) slide on the control flanks (21), substantially in linear contact therewith.
4. Cylinder lock according to any one of the preceding claims, characterised in that the control flanks (21) are rounded.
5. Cylinder lock according to any one of the preceding claims, characterised in that the tip (16) of the at least one core pin (18) forms a cylindrical projection (17).
6. Cylinder lock according to any one of the preceding claims, characterised in that the base of the key channel (11) comprises recesses (32) for entry of the tip (14, 16) or the cylindrical projection (17) of the at least one core pin (15, 18).
7. Cylinder lock according to any one of the preceding claims, characterised in that the key (1) is a reversible flat key.
8. Cylinder lock according to any one of the preceding claims, characterised by a plurality of core pins (15, 18) which are arranged in succession in the insertion direction of the key (1), in particular one or more core pins (18) forming tips (16) having cylindrical projections (17).
9. Cylinder lock according to any one of the preceding claims, characterised in that the lead-in bevel (13) is associated with a low ridge (5) and/or a high ridge (4) of the key (1).
10. Cylinder lock according to any one of the preceding claims, characterised in that the lead-in bevel (13) extends over substantially the entire key thickness.
11. Cylinder lock according to any one of the preceding claims, characterised in that the control flanks (21) are associated with the bases of two grooves (20) flanking the high ridge (4).
12. Cylinder lock according to any one of the preceding claims, characterised in that the control flanks (21) are associated with the bevelled walls of a low ridge (5).
13. Cylinder lock according to any one of the preceding claims, characterised in that the control zones (22) and the lead-in bevel (13) are at different angles to the key channel plane.
14. Cylinder lock according to any one of the preceding claims, characterised in that the axial length (a) of the control zones (22) is slightly greater than the ridge height (b) of a low ridge (5) associated with the base (33) of the key channel (11) but slightly less than the distance (c) between the apex surface (34) of the low ridge (5) and the base of a groove (20) adjacent to the low ridge (5).

Images