EP2133491B1 - Profile lock cylinder with associated key - Google Patents

Description

The present invention relates to a profile lock cylinder with associated key according to the preamble of the main claim.

Such a combination of profile lock cylinder and associated key is known DE 30 05 481 A1 ,

In this known combination, a key provided with recesses for aligning pin tumblers is laterally provided with a linear toothing element in the manner of a toothed rack in order to rotate the locking elements additionally provided for the spring-loaded pin tumblers so that the rotary lock between the lock core and the housing of the profile-locking cylinder is released.

In this case, however, the introduction of the additional locking elements is considerably more difficult because the necessary for the locking elements return springs are designed as coil springs, which can be mounted only very difficult mechanically between the locking elements and the lock core.

Furthermore, such return springs can only produce a limited restoring force due to their filigree design, so that such a profile lock cylinder, which is naturally also subject to wear and also contamination, can not always be operated reliably.

Another problem of such profile locking cylinders are the possibilities of unauthorized overcoming by picking or by impact technology, in particular, measures are known (see, for example DE 20 2004 017 531 U1 ) to counteract manipulation attempts according to the so-called impact technique.

However, such a profile lock cylinder is not necessarily armed against picking, such as the profile lock cylinder of the aforementioned DE 30 05 481 A1 ,

It is therefore an object of the present invention to further develop a generic combination of profile lock cylinder and associated key so that it provides reliable protection against picking as well as against the impact technique under simplified manufacturing.

This object is achieved by the invention with the features of the main claim.

From the invention there is the advantage that the reproduction of keys for unauthorized overcoming the profile locking cylinder is considerably more difficult.

An inadmissible nachgefertigter key must namely in addition to the recesses on the key shank for aligning the spring-loaded pin tumblers also have a laterally disposed linear toothing element at the right place, the toothing of which corresponds to the teeth of the locking body, it should be noted that the teeth after tooth pitch and module so too finished, as it dictates the gear located on the locking body.

This is practically impossible with conventional key copying methods, so that the additional security that the profile-locking cylinder according to the invention offers against the picking method and the striking technique also exists an additional copy protection for the key is offered.

Essential to the invention is the fact that the return spring is displaced via a separate displacement element from the blocking element, which is coupled in a gear to the blocking element.

In this way, return springs can be used, which are not stretched by the rotational movement of the locking element but by direct linear application of force in the longitudinal direction.

The coupled displacement element, which biases the return spring according to the invention as soon as an authorized key is inserted, can therefore perform a deviating from the rotational movement of the locking element displacement, for example, a linearly extending in the longitudinal direction of the lock core displacement path and to stretch a correspondingly dimensioned compression spring on this displacement ,

Essential for the invention is therefore the decoupling between the movement of the locking element and the movement of the displacement element, which are connected to each other only via the common gear coupling.

In this case, the displacement element can be acted upon directly by the return spring in order to keep the friction forces always present as low as possible.

The gear coupling preferably takes place purely in a form-fitting manner via a pairing of contact surfaces that are movable relative to one another, one of which is located on the blocking element and one on the displacement element.

In embodiments, without limitation of the invention thereto, positive pairings of contact surfaces are formed by combinations of flat cams and ram surfaces or additional gears and racks.

In this regard, reference is made to the embodiments.

Is the displacement element linearly movable between two end positions, the use of coil springs as return springs, which are very easy to integrate into the lock core due to their straight extension and can be dimensioned according to size and spring constant in wide ranges as needed variable.

When using an additional gear for actuating the displacement element, which then has the rack, it is additionally proposed to provide a rotation stop on the displacement element, so that the spring-loaded rack can not rotate the blocking element beyond the blocking position.

For easy installation of the locking element in the lock core is additionally proposed to provide the entire locking element with the gear located thereon for the linear gear on the key and the gear or the cam (eg) for essential to the invention gear coupling to a - preferably single - axle body - preferably in one piece - which is stored flying in the lock core.

The axial direction should run laterally next to the keyway and practically parallel to its main vertical direction.

This offers the advantage that the fully equipped with the additional locking element lock core can be easily inserted as before in the housing of the profile lock cylinder.

In addition, it is proposed that the axis of the locking element should have an outer diameter which corresponds to the Fußkreisdurchmesser provided for loading by the key gear.

This offers the advantage of simple production and the largest possible Wälzkreisdurchmesser.

In order to achieve in this development in a simple way blocking the rotational movement of the lock core by an unauthorized key, a recess should be provided in the housing of the profile lock cylinder where the bore for receiving the insertion end of the axis breaks through the wall of the lock core.

If, for example, a blocking nose is then provided at this end of the axle, it only needs to be unscrewed from its blocking position by the key which has been inserted in order to enable the rotational movement of the locking core.

Advantageously, the axis must then not exceed a rotation angle of 180 °.

The best possible blocking effect is achieved with a rotation angle of 180 °.

The relevant recess in the housing of the profile lock cylinder can then also be made simply as parallel to the longitudinal direction of the lock core extending axial groove.

To allow in a simple way on the one hand, the axial fixation of the locking element and on the other hand, a twisting with little effort, it is proposed that the axis is provided at its end bearing the gear with a hemispherical dome, which on the inner wall of the housing bore for the lock core with plays only a small amount of play or without play.

This can be achieved in that the bore, which receives the axis of the locking body, is designed as a stepped bore.

As a result, the axis is fixed on the one hand in the direction of decreasing diameter and on the other hand by the hemispherical dome in the other axial direction.

Preferably, the axis between two pin tumblers is arranged to have as much material cross-section for mounting the bore for the axis and the gear coupling available.

In addition, if you bring the linear gear on the key so that its first tooth gap is located at the key tip - and corresponding to the locking position of the locking element associated rotational position of the gear, the possibility is opened to displace as little material at a non-cutting shaping of the linear gear have to.

Furthermore, then the blocking element must have a relatively large distance from the Einsteckseite the profile-locking cylinder, so that it is also very difficult to access for any additional manipulation attempts.

In the following the invention will be explained in more detail by means of exemplary embodiments.

Fig.1

Schnittdarstellung des Profilschließzylinders in Sperrstellung

Fig.2

Schnittdarstellung des Profilschließzylinders in Freigabestellung

Fig.3

getriebliche Ankoppelung zwischen Sperrelement und Verlagerungselement

Fig.4

Darstellung des Eingriffs zwischen Sperrele- ment und Linearverzahnungselement am Schlüssel

Fig.5

Seitenansicht des Zyinderkerns bei eingestecktem Schlüssel

Fig.6

zutrittsberechtigter Schlüssel in Seitenansicht

Fig.7

Querschnitt des zutrittsberechtigten Schlüssel im Bereich der ersten Ausnehmung

Fig.8,9

Schnittdarstellung durch den Profilschließzylinder mit und ohne ausgerichteten Zuhaltungen sowie Anordnung der Bohrung zur Aufnahme des Verlagerungselements

Fig.10

ein weiteres Ausführungsbeispiel für einen Sperrkörper

Fig.11

das Ausführungsbeispiel gemäß Fig.10 in Verbindung mit einem entsprechenden Verlagerungselement

Fig.12

Querschnitt des Sperrkörpers gemäß Fig.10 im Bereich des Flachnockens

Fig.13

ein Ausführungsbeispiel mit zwei Sperrnasen und zwei gehäuseseitigen Aussparungen

Fig.14

ein Sperrelement gemäß Fig.13 im Detail

Show it:

Fig.1

Sectional view of the profile lock cylinder in locked position

Fig.2

Sectional view of the profile locking cylinder in the release position

Figure 3

Gear coupling between locking element and displacement element

Figure 4

Representation of the engagement between locking elements ment and linear gear element on the key

Figure 5

Side view of the Zyinderkerns with inserted key

Figure 6

Access key in side view

Figure 7

Cross-section of the authorized key in the area of the first recess

Fig.8,9

Sectional view through the profile lock cylinder with and without aligned tumblers and arrangement of the bore for receiving the displacement element

Figure 10

a further embodiment of a locking body

Figure 11

the embodiment according to Figure 10 in conjunction with a corresponding displacement element

Figure 12

Cross section of the locking body according to Figure 10 in the area of the flat cam

Figure 13

an embodiment with two locking lugs and two housing-side recesses

Figure 14

a blocking element according to Figure 13 in detail

Unless otherwise stated below, the following description applies to all figures.

The figures show a profile lock cylinder 1. Such a profile lock cylinder has a housing 2, which has a circular cylindrical profiled and an attached thereto web-like area.

In the circular cylindrical profiled area sits a rotatable lock core 3, which has a longitudinally extending keyway 4 for an authorized key 5.

The key 5 is inserted with its key shank 6 in the key channel 4 and has recesses. 7 on, which are provided for aligning spring-loaded pin tumblers 8.

Such pin tumblers have a core pin 9 and a cylindrical pin 10, which are each guided together in a common bore and are pressed by a tumbler 11 in the direction of the lock core 3.

By inserting the key 5, the individual tumblers are aligned so that the parting plane 12, which is located between the housing 2 and lock core 3 and the parting plane 13, which is located for each Stiftzuhaltung 8 between the core pin 9 and the cylindrical pin 10, aligned.

Then the lock core 3 would be rotatable without the additional measure provided according to the present invention.

Here, however, at least one additional locking element 14 is provided, which is equipped with a gear-like toothing which projects laterally into the key channel 4. This means that the locking element 14, or its gear-like trim 17 can be rotated with the insertion of an authorized key in rotation.

In this case, the blocking element 14 from the blocking position 15, the in Fig.1 is shown, are rotated so that the positive connection, which is caused via the blocking element 14 between the lock core 3 and the housing 2 of the profile-locking cylinder 1, is canceled.

For this purpose, it is necessary to bring about a rotation of the locking element, which is directed against the force of the return spring 16, so that the anti-rotation lock is released due to the locking body 18 between the lock core 3 and housing 2.

For this purpose, a key 5 arranged on the linear toothing element 19, which meshes with the insertion there of the key 5 in the keyway 4 with the gear 17 of the locking element 14 arranged there.

It can be imagined that the rotation of the blocking element 14 leads to a disengagement of the locking nose 28 arranged at the lower end of the blocking element 14 (see FIG. Fig. 2 ), so that the lock core 3 is then freely rotatable.

On the other hand, however, the blocking element 14 is acted upon by the return spring 16. In this case, the return spring 16 is coupled by means of a separate from the blocking element 14 displacement element 23 to the locking element 14, wherein the displacement element 23 is essential to the invention relative to the locking element 14 movable, preferably linearly movable.

Only by movement of the displacement element 23 as a result of the gear 17 forced through the linear gear 19 rotational movement, the displacement element 23 is set in motion and biases the return spring 16, which in turn ensures the withdrawal of the key 5 that the blocking element 14 in his in Fig. 1 returns shown basic position.

In this case, the displacement element 23 is acted upon directly by the return spring 16.

For this purpose, it is recommended, in particular the Figures 3 and 10/11 the geared coupling to realize a positive fit via a pairing of relatively movable contact surfaces 20a, 20b, of which one is provided on the blocking element 14 and one on the displacement element 23.

In addition, both embodiments show the Figures 3 or 10/11 displacement elements 23, between two end positions are linearly movable, so that as a return spring 16 each have a coil spring is used.

As the Figures 10/11 show, the geared coupling in this embodiment and without limitation of the invention on a mounted on the locking element 14 flat cam 21 and provided on the displacement element 23 plunger surface 22 flat cam and plunger surface are with their associated contact surfaces constantly in positive engagement, because the return spring 16 also in the blocking position of the blocking element 14 is under a certain bias.

In the embodiment according to Fig. 1 the geared coupling is realized via a toothed rod 23a arranged on the displacement element 23 and a toothed wheel 24 attached to the blocking element 14.

It can be understood that upon rotation of the gear 24, the rack 23a, which is connected in the same material with the displacement element 23, ensures a linear movement of the displacement element 23.

In order to minimize the friction between the respective contact surfaces, suitable material pairings, for example steel-PTFE or the like may be selected.

Furthermore, it shows in particular Fig. 3 in that the gear 24, in the blocking position 15 of the additional blocking element 14, encounters a rotation stop 25 provided on the displacement element 23.

It is only a step to which a predetermined tooth of the gear 24 runs with increasing approach of the displacement element 23 to the axis of rotation of the gear 24, so that from then the further rotational movement of the gear 24 is stopped.

Furthermore, the figures show that the blocking element 14 is cantilevered in the lock core 3.

The shaft provided on the locking element 14 is therefore located in a corresponding bore of the lock core 3 where it has a bearing portion 25a and is freely rotatably mounted in this.

The bore 26 is arranged as a through hole parallel to the main center plane of the key channel 4 and sits laterally next to this with a distance so that the gear 17 of the locking element 14 can protrude into the keyway.

Especially Fig.5 and 6 show the arrangement of the locking element 14 in the inner end region of the key core and the keyway and the linear gear 19 corresponding thereto only in the region of the key tip. This measure allows due to the deep arrangement of the locking element in the key channel virtually no manipulation to overcome the system.

In addition, it is proposed that the axis of the blocking element 14 has an outer diameter which corresponds to the root diameter of this gear 17.

In this way it is ensured that the engagement circle between this gear 17 and the linear toothing element 19 on the key has the largest possible diameter and the axis also.

Furthermore, it is proposed that the bore 26 of the lock core in that rotational position, which occupies the lock core in the key insertion position, with a recess 27 in the housing 2 of the profile lock cylinder 1 should be aligned.

In particular Figures 1 and 2 show, namely, at the lower end of the axis, a locking lug 28 may be provided be, which is turned into the recess 27 of the housing to prevent the rotational movement of the lock core with unauthorized keys.

Like a comparison of Figures 1 and 2 shows, the locking lug is formed here by a secant chamfer, which in the release position accordingly Fig. 2 completely within the contour which circumscribes the lock core.

The free rotational mobility is ensured in this way as soon as an authorized key has the blocking element 14 aligned properly.

In this case, as shown, the angle of rotation of the locking element 14 can be up to 180 °.

In this way, the maximum possible engagement of the locking lug 28 is ensured in the recess 27 of the housing 2.

The production of the recess 27 is facilitated if it is designed as parallel to the longitudinal direction of the lock core 3 extending axial groove.

As in particular a comparison of Figures 1 and 2 shows, in each case such an axial groove may be provided on both sides of the median plane of the web-like region of the housing 2 in order to be able to produce a profile closing cylinder which is equally suitable for right or left stop of the door.

Furthermore, the figures show that the locking element 14 at its end bearing the gear 17 has a hemispherical dome 29 which is slidably guided on the inner wall 30 of the housing bore for the lock core 3 but virtually no play.

In addition to this show Figure 13 and 14 a development in which in the housing 2 of the profile cylinder in each case two recesses 27, 27 'are provided, in which the axis, in each case with a locking lug 28, 28' engages of which in each case one end of the blocking element 14 sits.

Further, the bore 26 is designed as a stepped bore, so that the axis is guided in the other direction of the narrowing portion of the stepped bore.

The blocking element 14 is therefore guided axially arbitrarily exactly between the inner wall 30 of the housing 2 and the diameter step provided in the stepped bore.

In addition to this show in particular FIGS. 6 and 7 in that the linear toothed element 19 is attached to the key tip.

Fig. 6 shows, moreover, that, the linear gear member begins with a tooth root, in which then the gear 17 engages with a corresponding tooth tip, so that from the first moment on a positive and error-free contact between locking element 14 and key 5 is ensured.

As before Fig. 7 shows, the linear gear element is worked into the material of the key without leaving the maximum outer contour of the key.

If this linear gear element is chipless, i. produced by pressing, here takes place an additional solidification of the material at the key tip. This offers the added benefit of automatically reducing wear.

In addition, shows Fig. 5 in that the bore 26 is larger at its upper end than at its lower end where it faces the recess 27.

The assembly of the locking element 14 is therefore possible in a simple manner by plugging in from above.

In addition, since the blocking element 14 is guided with the dome 29 on the inner wall 30 of the housing 2, the blocking element 14 can not fall out of the position shown, even with very different rotational positions.

Further show FIGS. 8 and 9 the arrangement of the longitudinal bores in the lock core 3, which serve to receive the respective displacement element 23 and the associated return springs 16.

These are simple longitudinal bores whose inner diameter is adapted to the cross section of the respective displacement element and which lie laterally next to the bores for the pin tumblers 8 shown.

REFERENCE NUMBERS

1

Profile lock cylinder

2

casing

3

lock core

4

keyway

5

key

6

key shaft

7

recess

8th

pin tumbler

9

core pin

10

straight pin

11

tumbler

12

Parting line number 2 - 3

13

Parting line number 9 - 10

14

blocking element

15

blocking position

16

Return spring

17

gear

18

blocking body

19

Linear toothed element

20a

first contact surface

20b

second contact surface

21

flat cam

22

ram surface

23

shifting element

23a

rack

24

gear

25

rotary stop

25a

Storage area of the axis

26

drilling

27

recess

27 '

recess

28

locking tab

28 '

locking tab

29

knoll

30

inner wall

Claims (18)

1. Profile lock cylinder (1) and corresponding key (5) with recesses (7) on the key shaft (6) for adjusting the springloaded pin tumblers (8), each consisting of a key pin (9) and a driver pin (10), which are alignable with their shear line (13) by an authorised key (5) in the shear line (12) between the circular-cylindrical part of the housing (2) of the profile lock cylinder (1) and its plug (3) and equipped with at least one additional locking element (14) which extends laterally into the keyway (4) of the plug (3) with a cog-like gearing and which features a barrier element (18) in the direction of its locking position (15) loaded with a reset spring (16) and equipped with a gear wheel (17). This locking element, in the locking position, produces a form closure bond between the plug (3) and the housing (2) of the profile lock cylinder (1), whereby the form closure bond is, however, neutralised during corresponding torsion by a linear toothing element (19) attached laterally to the key (5) and corresponding to the gear wheel (17) of the locking element (14), characterised by the fact that the reset spring (16) is displaceable from the locking position (15) by the displacement element (23) which is separate from the locking element (14) and mobile - preferably linearly mobile - relative to the locking element (14) by means of a gear coupling.
2. Profile lock cylinder (1) and corresponding key (5) according to claim 1, characterised by the fact that the displacement element (23) is loaded immediately by the reset spring (16).
3. Profile lock cylinder (1) and corresponding key (5) according to claim 1 or 2, characterised by the fact that the gear coupling is carried out positively by a pairing of contact areas (20a, 20b) which are mobile relative to each other, one provided on the locking element (14) and one on the displacement element (23).
4. Profile lock cylinder (1) and corresponding key (5) according to one of the claims 1 to 3, characterised by the fact that the displacement element (23) is linearly mobile between two final positions and that the reset spring (16) is a coil spring.
5. Profile lock cylinder (1) and corresponding key (5) according to claim 3 or 4, characterised by the fact that the gear coupling is carried out by a flat cam (21) attached to the locking element (14) and a ram surface (22) provided on the displacement element (23), whereby the flat cam (21) and the ram surface (22) are positively in mutual contact.
6. Profile lock cylinder (1) and corresponding key (5) according to claim 3 or 4 characterised by the fact that the gear coupling is carried out by a gear rack (23a) attached to the displacement element (23) and a gear wheel (24), attached to the locking element (14), whereby the gear rack (23a) and the gear wheel (24) are positively in the mutual contact.
7. Profile lock cylinder (1) and corresponding key (5) according to claim 6, characterised by the fact that the gear wheel (24) in the locked position (15) of the locking element (14) runs onto a rotating stop (25) at the displacement element (23).
8. Profile lock cylinder (1) and corresponding key (5) according to one of the claims 1 to 7, characterised by the fact that the locking element (14) sits on an axis (25a) cantilevered in the plug (3).
9. Profile lock cylinder (1) and corresponding key (5) according to claim 8, characterised by the fact that the axis exhibits the root diameter of the gear wheel (17) as the external diameter.
10. Profile lock cylinder (1) and corresponding key (5) according to claim 8, characterised by the fact that the axis is mounted in a drill hole (26) of the plug (3), which is aligned in the plug's (3) position of key entry with at least one recess (27, 27') positioned at the end of the axis in the housing (2) of the profile lock cylinder (1), and that the axis here possesses a cam (28) which extends into the recess (27, 27') and which, upon full insertion of the key (5) completely into the plug (3), lies in a rotary position of the plug (3), which corresponds to the position of key entry.
11. Profile lock cylinder (1) and corresponding key (5) according to claim 10, characterised by the fact that the cam (18) is formed by a chamfering secantially passing inside the outer contour of the plug (3) upon full insertion of the key (5).
12. Profile lock cylinder (1) and corresponding key (5) according to claim 10 or 11, characterised by the fact that the axis covers an angle of rotation of up to 180°.
13. Profile lock cylinder (1) and corresponding key (5) according to claim 10 or 11, characterised by the fact that the axis covers an angle of rotation of around only 60°.
14. Profile lock cylinder (1) and corresponding key (5) according to claim 10, characterised by the fact that the recess (27) in the housing (2) of the profile lock cylinder (1) is an axial groove running parallel to the longitudinal direction of the plug (2).
15. Profile lock cylinder (1) and corresponding key (5) according to one of the claims 8 to 14, characterised by the fact that the axis, at the end which supports the gear wheel (17), is guided by a hemispherical cap (29) on the inner wall (30) of the housing bore for the plug (3).
16. Profile lock cylinder (1) and corresponding key (5) according to one of the claims 8 to 15, characterised by the fact that the axis sits in a stepped hole, which is positioned between two pin tumblers (8).
17. Profile lock cylinder (1) and corresponding key (5) according to one of the claims 1 to 16, characterised by the fact that the locking element (14) within the end area of the keyway (4) and the linear toothing element (19) are attached to the key tip.
18. Profile lock cylinder (1) and corresponding key (5) according to one of the claims 1 to 17, characterised by the fact that the linear toothing element (19) is manufactured without chips.

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