EP0887494A2 - Key - Google Patents

Abstract

Each of the two tumblers (10,11) consists of a core pin (10) and a housing pin (11) guided in bores (9) crosswise in the cylinder core (6). The spring-loaded housing pins exert pressure on the outer ends (13) of the core pins. In a release position, the top surfaces (16) of the core pins fit into the recesses in the key's profiled part so that the other ends (13) of the core pins lie in the outer surface of the cylinder core. The head (16) of a core pin exerts pressure on a pre-set part of the peripheral wall (15) of at least one of the recesses (14). The peripheral surface is intersected at an angle of between 80 and 100 degrees by the longitudinal centre line of the core pin.

Description

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

Such keys are generally known. In a special one EP 0 651 117 B1 shows an exemplary embodiment such key with the peculiarity that the key is to be inserted into a key channel in the peripheral surface of the cylinder core opens, the key consisting of two circular cylindrical spaced bodies, which are connected to each other via a narrow waist area are.

This symmetrical cross-sectional shape the key offers especially for so-called reversible keys, which are in two possible insertion positions are inserted into the key channel can be.

This key fits a profile cylinder with tumbler elements in its round cylindrical part, which regarding radially aligned with the axis of rotation of the rotatable cylinder core are. The tumbler elements are frustoconical Recesses with a radial direction in the Key backs are brought into their release positions aligned. For this purpose, those that are movable in the cylinder core rest Core pins with their head faces on the bottom of the frustoconical recesses. It is therefore the depth of the frustoconical recesses crucial for alignment of the tumbler elements because this is the immersion path limit the head surfaces of the core pins in their pin holes so that the core pin when creating its head surface on Bottom of the recess aligned in its release position is.

With this type of interaction between depressions and core pins is therefore the depth of the frustoconical Recesses in the back of the key are decisive for the access authorization.

However, since the floor plan of each floor area is always larger than the top surface of the core pin that snaps there is an axial play in the key channel for this key possible without affecting the key function.

This axial play is not undesirable per se because, among other things, wobbling of the key can be avoided in this way. Due to the axial play, it comes to _1/10 mm, more or less depth of insertion of the key in the key channel is not on.

Also, the relative position of the depressions to each other can range from _^1/10 mm well vary.

If the keys are copied incorrectly outside of the quality and safety standards required by the lock manufacturer it therefore happens that such a key - although not professionally manufactured - still fits.

Further measures must therefore be provided to: there is a latent risk of copying on keys, particularly of locking systems pushed back by unauthorized persons.

It can not in the sense of well-known manufacturers of Locking systems that provide security for access control affected by keys that may have been copied illegally becomes.

It is therefore an object of the present invention, the known Key through mechanical processing measures like this to improve that copy security significantly improves is and that the associated lock cylinder with little manufacturing technology remains producible.

The invention solves this problem with the features of Claim 1.

The advantage of the invention is that when used the usual manufacturing processes in both manufacturing the key as well as the locking cylinder a clear Scanning sensitivity improved becomes.

This advantage is achieved in that the core pin with its head area no longer on the bottom of the Depression, but on a predetermined part of the peripheral wall of the depression. Since the peripheral wall is in the axial direction the key in the manner of a truncated cone surface circularly curved, it comes to the present invention very precise to the axial insertion position of the key in the Key channel. In the event of deviations from the required nominal insertion depth is the correct alignment of the tumbler elements no longer guaranteed and also in the case of impermissible ones Key copies where the manufacturer requested Accuracy of the geometric distance of this depression (s) has not been observed from the zero point.

In this case, the top surface of the core pin no longer attack at the predetermined location on the peripheral wall, but a bit off. However, there Peripheral wall of the intended contact zone, which it offers the core pin, so far curved that it is no longer aligned in its release position.

Another advantage of the invention is that due to the indentations, only a small amount of key material is cut away. The stability of the key therefore remains receive.

With regard to copy security, it is also important that the cone angle of the depression is decisive for the Align the tumblers. It is therefore next to the axial position the cone angle of the depression is also a copy criterion. So far the tumblers on the bottom of the depressions have been aligned, relatively large manufacturing tolerances occur. The direction of the tumblers according to the present invention on the peripheral wall of the depressions no longer allows this.

In addition, the possible variation of the Taper angle illegal copying because of such taper angle are very difficult to measure. Small deviations have an effect already in the functional failure of the copied key out.

Preferably, the applied circumferential surface of the longitudinal center line of the core pin at an angle between about 80 ° and 100 ° are crossed. This has the advantage the low wear between the peripheral wall of the Countersink and the top surface of the core pin. The least Wear occurs in a vertical constellation between the Longitudinal center line and the applied peripheral surface.

The diametral offers manufacturing advantages practically vertical due to the axis of rotation of the cylinder core stands on the loaded area of the peripheral wall. In this case, the depression is due to the axis of rotation of the cylinder core exactly secantial drilling of the Key back created. The danger that the drill or Milling cutter dodges sideways and that the depression thus incorrectly positioned is the least.

If you also align the longitudinal center line of the core pin so that this with the diametral through the axis of rotation of the cylinder core is aligned, you have the wear-optimized and the simplest manufacturing requirements, to come to the key of this invention.

Ideally, the circumferential wall is acted upon the tangential plane to the peripheral wall of one Diametrical through the axis of rotation of the cylinder core practical crossed at 90 °. The diametral thus forms the surface normal the tangential plane in the center of the applied area the peripheral wall. It is taken into account that the acted upon Area extending both circumferentially as well as across it.

On the other hand, the core pin can also be used preferably with one feel the rounded tip of the peripheral wall.

In the case of practically punctual intervention between Core pin and peripheral wall of the depression can be the most precise Force scanning behavior with the benefit of the greatest possible Difficulty in unauthorized copying of such Key.

Comparable to the known arrangement of tumbler elements in rows it is still suggested that up to five depressions are provided in a row, all of them are assigned by the heads of assigned core pins. These characteristics give the greatest yield when of the five depressions only two are activated. With these The possibility of coding such keys can feature consequently be increased tenfold.

With regard to the necessary diversity of Lockings in locking systems can lead to depressions according to this invention also further depressions be provided on their bottoms by the core pins further Locking elements are acted upon. For this, the State of the art.

The depressions according to this invention can be of only one side or both sides in the profile area of the key. If you also provide This makes it difficult to design the depressions as breakthroughs additionally the possibility of scanning in the case of illegal copying, since the depth of the depression is only above geometric relationships can be calculated.

In addition to the possibility of manufacturing these depressions by means of a drill, a conical milling cutter is preferred with a Cutting angle of 90 °. The axis of rotation of the conical milling cutter should with the surface normal on the central longitudinal key plane collapse. On the one hand, the conical milling cutter offers high rigidity against lateral evasion. That way needs a centering point is not provided. By the Cutting edge angles in themselves become very favorable geometric sampling ratios achieved. The longitudinal center lines of the tumbler elements thus run practically radially to the axis of rotation of the cylinder core.

In further development of these features, keys should be preferred whose key back is a round cylindrical in particular have a circular cylindrical cross section which is followed by a radial web. The center of the round or circular cylindrical cross section runs coaxially with the Axis of rotation of the cylinder core and falls practically with this together. The depressions according to this invention are then intended introduced in the half circumference of the key back be on which also the radial web sits.

In this way, the entire remaining half circumference remains the back of the key to attach the usual to this day Tumbler elements, of which the core pins make up the floor Feel the corresponding depressions on the back of the key.

Fig.1

ein Ausführungsbeispiel der Erfindung mit einer Einsenkung,

Fig.2

ein Ausführungsbeispiel der Erfindung mit zwei Einsenkungen,

Fig.3

ein Ausführungsbeispiel der Erfindung als Hauptschlüssel mit fünf Einsenkungen,

Fig.4

ein Ausführungsbeispiel der Erfindung im Zusammenwirken mit Zuhaltungselementen im Schließzylinder,

Fig.5

ein Ausführungsbeispiel der Erfindung, unzulässig kopiert oder ohne Zutrittsberechtigung,

Fig.6

ein Ausführungsbeispiel mit beidseitig angeordneten Einsenkungen,

Fig.7

ein Ausführungsbeispiel möglichen Zusammenwirkens zwischen Kernstift und Umfangswand,

Fig.8

Eingriffsverhältnisse zwischen Kernstift und Umfangswand bei flächiger Beaufschlagung,

Fig.8a

Ansicht von vorne,

Fig.9

Eingriffsverhältnisse zwischen Kernstift und Umfangswand mit praktisch punktueller Beaufschlagung,

Fig.9a

Ansicht von vorne, und

Fig.10

Herstellung einer Einsenkung nach dieser Erfindung.

The invention is explained in more detail below on the basis of exemplary embodiments. Show it:

Fig. 1

an embodiment of the invention with a depression,

Fig. 2

an embodiment of the invention with two depressions,

Fig. 3

an embodiment of the invention as a master key with five depressions,

Fig. 4

an embodiment of the invention in cooperation with tumbler elements in the lock cylinder,

Fig. 5

an embodiment of the invention, copied without permission or without access authorization,

Fig. 6

an embodiment with depressions arranged on both sides,

Fig. 7

an embodiment of possible interaction between the core pin and the peripheral wall,

Fig. 8

Engagement conditions between the core pin and the peripheral wall when exposed to a large area,

Fig.8a

Front view,

Fig. 9

Engagement conditions between core pin and peripheral wall with practically selective application,

Fig.9a

Front view, and

Fig. 10

Making a depression according to this invention.

Unless otherwise stated below, the following description always for all figures.

1 to 3 on the one hand and 4 to 6 on the other show the interaction between a key and the Tumbler elements in the lock cylinder according to this invention.

The key 1 has a profile area 2. Of the Profile area 2 is profiled in cross section in a certain way. There is a negative on the profile of profile area 2 profiled key channel 7 adapted in the rotatable Cylinder core 6 of a profile cylinder 3 is located. The cylinder core 6 sits in the housing 4 of the profile cylinder 3 and is from the outer housing wall through a stationary housing ring 5 separated. Thus, the cylinder core 6 rotates in the inner diameter of the stationary housing ring 5. The stationary Housing ring 5 is pierced with radial bores continue in radial bores of the cylinder core 6. In the holes shown are aligned with each other. There is a pair of tumbler elements in each of the holes. The tumbler elements are pairs of pins. It deals a core pin 10, which is guided in the cylinder core 6 and a housing pin 11 which is guided in the pin bore 9 is, which is introduced in the stationary housing ring 5.

The tumbler elements are therefore in two parts. In a certain position, the outer surface 13 is aligned on the outer End of the core pin 10 with the parting line between the stationary housing ring 5 and the cylinder core 6 are formed becomes.

In this position, the cylinder core 6 can be released rotate.

This position of the core pins 10 is called the release position designated.

For this purpose, the core pins 10 are on their outer Ends 13 of the housing pins 11 and the outer Ends of the housing pins 11 are under the influence of each a biasing spring 12 so that the two belong together Tumbler elements - core pin, housing pin - in Are spring-loaded in the direction of the cylinder core.

To align the core pins 10 in the release position, in which this with its outer surfaces in the parting line lie between the cylinder core 6 and the stationary housing ring 5, dip the core pins 10 with their head surfaces 16 in Indentations 8, which are provided on the key 1. Here the depressions 8 are so deep that the outer Ends of the core pins 10 in the correct insertion depth of the Key all the rotational mobility of the cylinder core 6 release.

It is now essential that in the waist area between Key chest and key back depressions 14.1 to 14.5 are provided, which have a conical cross section. Predetermined areas of the conical peripheral walls 15.1 to 15.2 are assigned from the head surfaces 16.1 to 16.2 Core pins 10 acted upon. It is essential that in this pressurized insertion position of the key 1 Position of the core pin 10 in its pin hole 9 determined is that it is in its release position.

It is therefore essential that the peripheral wall 15 limits the immersion path of the head surface 16 of the core pin 10 so that the core pin when its head surface on the Circumferential wall 15 is in the release position. For this purpose the peripheral wall 15 lie in the path of the top surface 16, which one can travel within their scope of movement. Furthermore, the peripheral wall must lie there so that it is at a distance occupies the gap between the key core and the housing ring, which is the same size as the effective length of the core pin 10th

Fig. 7 also shows a general representation. There is the loaded peripheral surface 15 from the longitudinal center line 22 crossed at an angle 27 of approximately 100 °. Of the Crossing angle 27 should be in the range between about 80 ° and 100 °. Ideally, the crossing angle is 27 90 °. This ensures that the entire head area 16 of the core pin 10 lie snugly on the peripheral wall 15 can.

This results in favorable surface pressures and resulting favorable wear behavior.

8 and 9 show further developments, in which the diametral 21 through the axis of rotation 20 of the cylinder core stands practically perpendicular to the peripheral region 15, which is acted upon by the head 16 of the core pin 10. It is can be seen that the head 16 on a limited size Partial area of the peripheral region 15 of the peripheral wall Countersink 14 stands up.

Furthermore, the direction of movement of the core pin 10 in Cylinder core 6 predetermined so that the longitudinal center line 22 of the Core pin 10 coincides with diametrals 21 (Fig. 8a, 9a). It is therefore purely pure radial tumbler, which is formed by the core pin 10 with the essential feature that the counter surface, which of the Circumferential wall 15 is provided in the support area practically secantial to the round cylindrical cross section of the Key 1 lies.

A further development of this is shown in FIG. 9. While namely in FIG. 8, the circumferential region 15 that is acted upon extends in the circumferential direction and transversely thereto, is in the embodiment 9, the peripheral region 15 is very narrow. It is a practically selective application of Circumferential wall of the depression 14.

1 to 3 show further variations. While in In the case of FIG. 1, only a single depression 14 is provided is here in a predetermined cutting plane IV lies, the embodiment according to Figure 2 sees two such depressions at different axial positions of the key in front.

However, one of these axial positions is correct with the Position IV from Fig.1 match, so that this key without also perform the function of the key according to Fig.1 can.

3 shows a case in which five depressions 14.1 to 14.5 in a row, all of which are Circumferential walls 15 are acted upon by core pins assigned to heads 16 will.

Because this key also countersink in the axial plane IV according to Figure 1 and the axial plane II according to Figure 2, this key would therefore be authorized to close the Make locks, including the keys according to Fig.1 and Fig.2 are authorized, but not vice versa.

It is therefore a superordinate key with further access authorization.

The five depressions according to Figure 3 lie on a line. Only two of the five depressions are included Core pins equipped, this results in the largest possible Variation. Ten combinations are possible. This means, up to ten for the parent key according to FIG. 3 subordinate different access authorizations will.

In addition, FIGS. 1 to 3 and FIGS. 4 to 6 show that in addition to the depressions 14 according to this invention further depressions are provided, the so-called on their soils Form contact points 19, which act as a barrier 18 are used for further pin tumblers.

In contrast to the depressions applied to the peripheral wall 14 however, the pin tumblers fall into the indentations 8 a that only the bottom of the path of incidence Core pin limited.

The depth of depression is therefore for such depressions solely decisive for the alignment of the pin tumblers in release position. The axial position of the depressions can vary in the sense of the floor dimensions. On the cone angle the peripheral walls do not come here at all as long as they are the same size or larger than the tip cone angle the core pins 10 are.

The bottom of the respective depression 8 therefore defines the secantial plane in the back of the key, which is the anti-collapse 18 forms for the corresponding tumbler.

Fig. 4 also shows the correct interaction between an authorized key and the tumbler. If you only consider the pin tumbler on 4 Clock, this is properly with her head 16 on the Circumferential wall 15, which is defined by the depression 14 is.

In this position, the core pin 10 is aligned that the rotary movement of the cylinder core 6 is possible.

On the other hand, Fig. 5 shows a copy which is either impermissibly copied Key or an unauthorized key. The pin tumbler at 4 o'clock the rotary movement of the cylinder core locks 6 characterized in that the outer surface 13 of the core pin is not with the parting line between the cylinder core 6 and the stationary housing ring 5 covers.

This can already occur because the key 1 not deep enough in the key channel of the cylinder core 6 is inserted. In that the peripheral wall 15 their distance from the joint between the cylinder core 6 and the housing ring 5 even with slight axial mispositioning significantly changed, this leads to the shown effect.

Fig. 4 also shows the peculiarity that in the Keys each a pair of side depressions 14 is so deep that the key is in principle one Breakthrough 17 has. Because the breakthrough prevents it determine the exact drilling depth with which a drilling or Milling tool can be inserted laterally into the key such a breakthrough also serves to prevent copying.

Fig. 6 shows another special feature. There are on both sides corresponding depressions in the profile area on the key 14 provided, in each of which one arranged there Core pin engages.

This measure serves to further increase the possible Variations. You can see for example on every key page five depressions before, each of two pin tumblers can be applied, the number of variations a hundredfold.

10 shows the production of the depressions 14. For this purpose, a conical milling cutter 23 is used, which has a cutting angle 24 of 90 ° is equipped.

The axis of rotation 25 of the conical milling cutter 23 coincides with the surface normal together, on the central longitudinal key plane 26 stands.

In this way, you can easily but effectively radial tumblers also for those exposed to the circumferential wall Create depressions 14.

As a further special feature, the figures show keys, the key back 28 a round cylindrical in particular circular cylindrical cross section and an adjoining Has radial web. The radial web is a short one and narrow waist area, which is the round cylindrical Key back with a likewise round cylindrical Key chest area 29 connects.

However, this does not have to be the case. The radial web can too without additional key chest area 29 on the key back 28 scheduled.

In any case, this embodiment offers the Possibility of the center of the round or circular cylindrical Recess of the key channel 7 practically with the axis of rotation of the cylinder core 6 to collapse. On the top Half circumference of the cylinder core 6 can then the regular tumblers with their corresponding depressions 8 in the key 1 may be provided while the additional depressions 14 with their loaded peripheral walls 15 then practical provided in the lower half of the key back 28 where the radial web is located.

Reference symbols:

1

key

2nd

Profile area

3rd

Profile cylinder

4th

casing

5

stationary housing ring

6

Cylinder core

7

Key channel

8th

Depressions

9

Pin hole

10th

first tumbler element, core pin

11

second tumbler element, housing pin

12th

Preload spring

13

Outer surface of the core pin

14,

14.1

to

14.5

Circumferential wall depression

15,

15.1

to

15.2

Circumferential area

16,

16.1

to

16.2

Head of the core pin

17th

breakthrough

18th

Incident lock

19th

Ground contact point

20th

Axis of rotation of the cylinder core

21

Diametral

22

Longitudinal centerline

23

Cone cutter

24th

Cutting edge angle

25th

Axis of rotation of the milling cutter

26

middle longitudinal key plane

27

Crossing angle

28

Key back

29

Key chest

Claims (13)

Key (1) whose profile area (2) corresponds to a negatively profiled key channel (7) in the rotatable cylinder core (6) of a profile cylinder and which is provided in the profile area (2) with lateral conical depressions for two associated tumbler elements (10, 11) which each consist of a core pin (10) and a housing pin (11) and which are practically guided in pin holes (9) lying transversely in the cylinder core (6), the core pins (10) at their outer ends (13) from the Housing pins (11) are acted upon, which in turn are resiliently supported in the direction of the profile area (2) of the inserted key (1), and the core pins (10) for aligning the tumbler elements (10, 11) in their release position with their head surfaces (16 ) into the predetermined deepening of the profile area (2) of the key (1) so that the other ends (13) of the core pins (10) are then in the outer surface of the cylinder in the core (6) (release position), characterized in that at least one of the depressions (14) acts on a predetermined part of the peripheral wall (15) of the head (16) of an associated core pin (10) and the position of this core pin (10) determined in its pin bore (9) so that it assumes its release position. Key according to Claim 1, characterized in that the circumferential surface (15) acted upon is crossed by the longitudinal center line (22) of the core pin (10) at an angle between approximately 80 ° and 100 °. Key according to claim 2, characterized in that the diametral (21) through the axis of rotation (20) of the cylinder core (6) is practically perpendicular to the loaded area (15) of the peripheral wall. Key according to claim 3, characterized in that the diametral (21) coincides with the longitudinal center line (22) of the core pin. Key according to one of claims 1 to 4, characterized in that the area of the application has an extent in the circumferential direction (15) and transversely thereto. Key according to one of claims 1 to 4, characterized in that the area of application is practically selective. Key according to one of Claims 1 to 6, characterized in that up to five depressions (14.1 to 14.5) are provided in a row, all of which have core pins (10) assigned to the peripheral walls (15) by the heads (16). Key according to claim 7, characterized in that, in addition to the depressions (14), further depressions (8) are provided which form contact points for the heads (16) of the core pins (10) of further tumbler elements on their bottoms (19). Key according to one of claims 1 to 8, characterized in that the depressions (14.1 to 14.5) are introduced into the key (1) from only one side. Key according to one of claims 1 to 8, characterized in that the depressions (14.1 to 14.5) are introduced into the key (1) from two sides. Key according to one of claims 1 to 10, characterized in that the depressions (14.1 to 14.5) form openings (17) in the key. Key according to one of claims 9 to 11, characterized in that the depressions (14.1 to 14.5) are introduced with a conical milling cutter (23) which has a cutting edge angle (24) of 90 ° and whose axis of rotation (25) with the surface normal on the middle longitudinal key plane (26) coincides. Key according to claim 12, characterized in that the key (1) has a key spine (28) with a round-cylindrical, in particular circular-cylindrical cross-section and an adjoining radial web, and in that the center of the round or circular-cylindrical recess of the key channel (7) practically also the axis of rotation (25) of the cylinder core (6) coincides and that the peripheral wall (15) of the depression (14) is introduced in that half circumference of the key back (28) on which the radial web is also seated.

Images