DE4322842A1 - Lock cylinders with keys, groups of such lock cylinders, a key for such a lock cylinder and groups of keys and key blanks - Google Patents

Abstract

What is proposed is a lock cylinder (16), the key-receiving channel (12) of which and the key (10) of which each have a bottle profile. The bottle profile can be modified for one or for both side faces (10l, 10r). <IMAGE>

Description

The invention relates to a lock cylinder with key, the lock cylinder comprising a lock cylinder housing with a core bore, often referred to as housing bore, which has a core bore axis and a cylinder core rotatably mounted in the core bore around the core bore axis, which has a parallel to the core bore axis in parallel union key receiving channel with a Has channel profile,
the key comprising a key handle and a key shaft with a shaft axis and with a shaft envelope profile, the shaft envelope profile having a central plane containing the shaft axis, a back edge surface, a chest edge surface and two side surfaces on both sides of the central plane, which is measured orthogonally to the shaft axis and along the central plane Define shaft height and a shaft width measured orthogonally to the median plane and variable along the shaft height,
wherein at least one side surface at least on a part of the shaft height has at least one convex-cylindrical curvature surface parallel to the shaft axis and wherein at least on one of the side surfaces to the shaft axis parallel grooves or / and ribs are formed which, in conjunction with the shaft envelope profile, are adapted to the channel profile Shaft profile result.

A lock cylinder with such a design of the Channel profile or the shaft profile is from DE-C2 37 11 935 known.

In the known design, the channel profile or Shank profile at a central part of its respective height a circular cylindrical profile part, the axis of which in the Middle plane of the channel profile or the shaft profile lies.  

A variation of the radius of the circular cylindrical profile part is not provided. For the rest, one would Variation of the circular cylindrical profile part is not a big one Variability result because of the radius variation Limits are that ultimately a relatively flat Key profile and thus channel profile is aimed for in a pocket, especially as part of a keychain comprising several keys, easily arranged lets and carry.

The invention has for its object a closure to specify cylinders of the genus described at the beginning, the Channel profile shape and its associated key shaft profile shape can be varied within wide limits to form a sub distinction between different locking cylinders and to make key keys possible, especially in the frame of locking systems.

To solve this problem, the invention proposes that the at least one convex-cylindrical arch surface at least in a part running parallel to the shaft axis area has a maximum radius of curvature, which is larger is the distance of this section from the median plane.

In the design according to the invention, there are many Variations of the key receiving channel and the Achieve shaft profile, taking care at the same time is that only the one particular channel profile assigned shaft profiles introduced into this channel profile can be and no others.

The invention can be applied in particular if the Shaft height at least twice, preferably at least 2.5 times, is as large as the maximum shaft width or / and that the maximum radius of curvature is about 1.5 times to about 6 times that  corresponds to the maximum shaft width, preferably at least 2.5 times to at least 5 times. Then there are key shafts profiles before, addressed as flat key profiles and can be carried relatively easily in your pocket leave, even if with other keys on one Keychain are summarized. Preferably, the a curved surface on both side surfaces. this leads to that an even greater number of channel profiles and accordingly, shaft profiles are also provided can.

When we speak of convex-cylindrical surfaces, so this is not supposed to mean that circular cylindrical curvature areas are required. The term "cylindrical surface" rather should also deviate from the circular cylindrical shape include cylindrical surfaces, as is the case in geometry The term "cylinder surface" corresponds. If you look at the term "cylindrical arch surface" this general meaning assigned, so you can still individual areas of these vaulted surfaces as a circular cylindrical surface area understand.

It is conceivable that the respective curvature surface over their total height extension the maximum radius of curvature has, that is circular cylindrical.

In addition, it is conceivable that the curvature surface only in one middle part of their height extension the maximum crumb radius and in at least one end area of their Height extension has a smaller radius of curvature.

It is particularly and preferably provided that the at least one side surface in one of the back edges area close envelope profile section out as a curved surface is formed and in a close envelope section section as  Flat area. Are such flat surfaces in the envelope profile close to the chest section provided, it is advantageous if this Flat surfaces are approximately parallel to the median plane.

It is recommended that the bulge surface be close to a back Envelope section with a transition angle close to the back from between approx. 70 and approx. 100 ° into the back edge surface transforms. In this way the character of a flat even more pronounced.

Extends the curvature surface of an envelope profile close to the back cut into an essentially flat, breast-like envelope section above, it is recommended that the bulge area of the envelope section close to the back with a breast near transition angle β of between approx. 140 and approx. 170 ° in the flat surface of the envelope profile section close to the chest merges.

You can see the shaft cover profile and accordingly the channel profile with keys and lock cylinders according to the invention compare with the shape of a bottle outline if you a usual bottle of drink in the axis of the Neck containing cutting plane imagines cut and if you have a viewing direction orthogonal to this cut based on level. The back edge surface is preferred adapted to the radius of the core hole.

The chest edge surface can be used for control in a known manner level-varied of spring-loaded tumbler pin pairs be trained.

At least one of the side surfaces can interact with a locking element or security element of the cylinder core that influences the rotary mobility of the locking cylinder, i.e. with a springless additional locking pin as shown in DE-C2 31 23 511 under reference number 7 or with a security pin, such as he is shown in this patent specification DE-C2 31 23 511 under the reference number 24 . In addition, at least one of the side surfaces can also be made to work together with a locking lever mounted on the cylinder core, as is shown in EP-A2 237 799 under reference number 26 .

A side surface acts with the rotational mobility of the Cylinder-influencing locking element together, so recommends there is at least one of the affected side surfaces in the Area of a key shaft tip with an advent slanted to block a slot The key shaft moves into the key channel at the The key tip bumps against such a locking element to prevent.

Those considered in isolation should also be protected Key for the locking cylinder described so far.

Using the locking cylinder described so far groups of locking cylinders can be different Provide secrecy where the shaft cover profiles trained identically within the respective group det. The different closing secret within such a group (first-mentioned group) can then be obtained that the envelope-like keys shafts of the individual locking cylinders of the group from each other through different grooves and / or ribs on at least one of the side surfaces and / or by different Profile variation of the chest edge surface and / or through under different profile variation of at least one side surface differentiate. In this way it is possible to use the same profile Chen key shafts and corresponding profile-adapted A hierarchical locking system generate, for example a locking system with one  parent key of a variety of lock cylinders to operate and with a variety of child keys, each of which only a single or a smaller group of lock cylinders which allows to operate.

Within a subgroup of such a group, the Grooves or / and ribs across the side surface of the various NEN lock cylinder be arranged similarly distributed and only the cross-sectional dimensions from each other Lich grooves and / or ribs corresponding to their position Lock cylinder to be different from lock cylinder. It is particularly thought of the possibility that the with respect to their position corresponding grooves or / and ribs of the individual locking cylinders in their Cross-sectional shape geometrically similar, in its cross-section size however are different.

For example, you can provide that with regard to their Position corresponding grooves or / and ribs in their Width, measured in the direction of the shaft height, varies are, in their penetration depth perpendicular to the central plane but are the same as each other.

You can use a given envelope profile, one or - depending on Size - also build several locking systems.

You can also see an upper group of lock cylinder groups (first named groups) produce, with individual groups within the Upper group through different shaft cover profiles and differentiate these corresponding channel profiles. Within the upper shell profiles can be such an upper group for the individual groups differ by difference Liche radii of curvature of the curved surfaces and / or below  different centers of the centers of curvature of the Vaulted surfaces.

But other group formations are also possible. That's the way it is after another type of group formation (second named Group) e.g. B. conceivable that the locking cylinder within a group have different envelope profiles, while the grooves or / and ribs at least in their central plane close cross-sectional areas from lock cylinder to lock cylinders of the group are identical.

An upper group formation is conceivable for this purpose is based on the fact that the individual groups differ in principle same position of the grooves and / or ribs in the individual Groups by different cross-sectional shapes of the grooves or / and differentiate ribs from each other.

According to the first group formation one can Set of key intermediate blanks for keys this Provide a group with the same envelope profile however different groove or / and rib arrangement on at least one side surface each. Such a set of Key intermediate blanks are, for example, in the Lock cylinder or key blank factory in stock held and as needed to apply level variations taken. Then a parent sentence of Intermediate key blank sets are kept in stock, in which the key intermediate blanks of the individual Intermediate blank sets from each other by different Distinguish shaft cover profile.

You can also go to the factory or to the locksmith a set of key pre-blanks with still missing to order of the grooves or / and ribs are kept ready, the key pre-blanks of individual groups  different shape of the shaft cover profile from each other differentiate.

It is also conceivable to use a set of keys between blanks for keys of the second group of Provide locking cylinders in which the intermediate blanks of the individual locking cylinders of a group identical shape of the grooves and / or ribs at least in the Cross-sectional areas close to each other through the median plane differentiate the different shape of the shaft cover profile.

The accompanying figures explain the invention. Put it represents:

Figure 1 is a cross section through a key shaft of the key of a lock cylinder according to the invention.

Fig. 1a to 1e different modifications of the key shaft according to Figure 1 with the same shaft envelope profile.

Fig. 2a to 2e further modifications of the key shaft shown in Figure 1 with different Schafhüllpro filen.

Fig. 3 shows a further modification of the key shank with an again modified Schafthüllprofil;

FIG. 4a is a lock cylinder with an inventive shaft profile and the side surfaces of the key shank scanning safety pins;

FIG. 4b is an arrangement according to 4a with distortion of profile shank Fig.

Figure 5 shows a lock cylinder with shaft profile according to the invention and with springless additional locking pins in engagement with profile variations of the Seitenflä surfaces of the key shaft.

FIG. 5a is a side view of the key shank of a key according to Fig. 5;

Fig. 5b shows a section along line Vb-Vb of Fig. 5a;

Fig. 5c shows a section along line Vc-Vc of Fig. 5a;

The side surfaces 6a th a lock cylinder with key according to the invention with the shaft and in the cylinder core gelager, the key shank scanning locking levers.

Fig. 6b an arrangement according to Fig 6a at adulterated key shank.

Fig. 7 shows an arrangement basically corresponding to that of Fig. 6a, however, the locking levers interact with profile variations of the side surfaces of the key shaft;

Fig. 7a is a side view of the key shank in accordance with Fig. 7;

Fig. 7b is a section along line VIIb-VIIb of Fig. 7a and

Fig. 7c shows a section along line VIIc-VIIc of Fig. 7a.

in Fig. 1, a key shaft is generally designated 10. This key shaft is received in a key receiving channel 12 (see Fig. 4a), which is indicated schematically by dash-dotted lines.

The key shaft profile is designated 10 a. This key shaft profile is formed within a key shaft cover profile 10 b by grooves n1-n4 and m1-m4 milled into the key shaft cover profile 10 b.

It can be seen that the key shaft cover profile 10 b is limited by side surfaces 10 l and 10 r, by a breast edge surface 10 p and a back edge surface 10 d. In its upper part of the total height h, the side surface 10 l is formed by a circular-cylindrical arch surface 10 lg, the center point Mlg of which is at the height hg and the radius of which is rg. It can be seen that the radius rg is substantially larger than the distance S of the arch surface 10 lg from the central plane EE of the shaft profile and thus also of the shaft envelope profile 10 b.

The same applies to the curved surface 10 around the right side face 10 r; this vaulted surface has a center billion at a height hd and with a radius rd.

It can also be seen that the side surfaces 10 l and 10 r are flat in the lower partial regions 10 lp and 10 rp , the distances of the partial regions 10 lp and 10 rp from the central plane EE being approximately the same; however, this is not necessary.

Looking at the shaft cover profile 10 b, it is unmistakable that this corresponds to the longitudinal section outline of a bottle.

So much for the geometry of a single key shaft. in Fig. 1a to 1e you can see the same envelope profiles 10 b as in Fig. 1. It can also be seen that in all the modifications of FIGS . 1a to 1e grooves n1, n2, n3 and n4 and m1, m2, m3 and m4 return at approximately the same location in each case and that these grooves are the same in depth for all modification profiles of FIGS. 1a to 1e; for this purpose, reference is made to the groove n2 in FIG. 1a, in which the bottom distance of the groove n2 from the central plane EE is designated n2x. This ground clearance n2x also returns in FIG. 1b and in the following FIGS. 1c to 1e. It should be noted, however, that the grooves n2 are suppressed in FIGS. 1d to 1e. The coordinates n2y and n2z in FIGS . 1a to 1c indicate that the upper and lower side surfaces of the grooves n2 can vary in their height with a corresponding variation of the groove width.

Thus be seen from FIGS. 1a to 1e, that using a constant Schafthüllprofils 10 b may provide a plurality of shaft sections, which differ from each other by different shapes of the grooves n1 to n4 and m1 to m4, where individual grooves may be dispensed with entirely .

It can now be easily imagined that, for example, the shaft profiles according to FIGS . 1b and 1c are assigned to two different, individually closing locking cylinders with complementary key receiving channels, so that each individually closing locking cylinder can only be closed and opened by its assigned key. Corresponding multiplication of the number of individually closing locking cylinders by a corresponding number of groove variations is possible.

But one can also imagine that the shaft profile is such as the creation of a hierarchical lock system according to Fig. 1a to 1e used, so shank profiles b, each with identical Schafthüllprofil 10th in this case, the shaft profile according to FIG. 1a could be thought of as the profile of a superordinate key (superordinate because the grooves are the widest in each case), while the shaft profiles according to FIGS . 1b to 1e are each individually assigned under ordered locking cylinders. In detail, this would mean that the locking cylinders belonging to the shaft profiles according to FIGS . 1b to 1e each have a key receiving channel which is complementary to the individual shaft profiles. In the key receiving channels of each of these locking cylinder belonging to FIGS . 1b to 1e, the key would fit with the shaft profile of FIG. 1a, so that the parent key according to FIG. 1a corresponds to the shaft profiles according to FIG. 1b 1e to 1e can actuate the lock cylinder, but cannot actuate the lock cylinder belonging to FIG. 1a with the keys corresponding to FIGS. 1b to 1e. So you could give the caretaker of a house equipped with a locking system the key with the profile shape according to Fig. 1a in the hands and the individual room occupy the key according to Fig. 1b to 1e, so that each of them unlock their own room cannot, but not the neighbour's room and not the headmaster's headquarters, while the caretaker could use the key according to Fig. 1a to close and open all rooms.

It should also be noted that at least the grooves n4 and m4 and the back design of the shaft profile in the area of the back edge surface 10 d are identical to one another in all FIGS. 1a to 1e and are also not modified by the formation of the grooves. The areas adjacent to the grooves n4 and m4 and the back edge area 10 d are therefore called “invariance areas”. In these areas of invariance, each key according to FIGS. 1a to 1e is clearly guided in the key receiving channel of its associated locking cylinder, however the other grooves and the ribs formed between the other grooves are designed. In this way, precise guidance is guaranteed in every lock cylinder key combination; This is necessary because, as will be explained in more detail, the pectoral ridges 10 p for controlling pin tumbler pairs are varied in level and the associated pin tumbler pairs can only be precisely controlled in the locking cylinder opening position if the respective key shank itself is precise key receiving channel is guided.

One can view the keys according to FIGS. 1a to 1e as a group of keys which are assigned to a group of locking cylinders with different locking secrets. In this case, the hülprofilprofile key shafts of the individual locking cylinders of the group ( FIGS. 1a to 1e) differ from one another by different grooves n1-n4, m1-m4 or / and ribs on at least one of the side surfaces 10 l, 10 r . Further differentiation possibilities lie in the variation of the breast edge area 10 p. Still further possibilities of differentiation lie in profile variations on the side surfaces 10 l, 10 r, which will be discussed later.

If one wants to build locking systems from the keys, according to FIGS. 1a to 1e, the choice of variation depends on the scope of the respective locking system. One can, for example, in a small locking system, the variation of the locking cylinder to lock cylinder or key to key, finally, by varying the position and dimension of the grooves. In the case of a larger locking system, for the purpose of distinguishing subordinate locking cylinders within the system, the level variations in the area of the side surfaces 10 r, 10 l can also be used to control security pins and / or springless additional locking pins, which will be discussed later.

Furthermore, distinctions can be made between individual locking cylinders and their keys by different profile variations in the area of the chest edge surface 1 op, in which case intermediate plates can also be provided in series with the pin tumbler pairs to be controlled by the breast edge surface 10 p, which also allow different profiles on the Single lock cylinders equipped with a chest wrench can be released or locked using a master key.

One can thus a FIGS. 1a-1e corresponding sub-set of cylinder locks with the same envelope profile 10 b of the key receiving channel and the associated key thereby creating in that the grooves n1 to n4 and m1 on the side surfaces 10 l to m4, distributed 10 r similar, however, the cross-sectional dimensions of the grooves n1 to n4, m1 to m4 and / or ribs of the locking cylinder, z. B. Fig. 1a, to lock cylinder, for. B. Fig. 1e, at least partially
Makes different. It is particularly thought that the grooves or / and ribs of the individual locking cylinders are geometrically similar in their cross-sectional shape but differ in their cross-sectional size. The groove and rib shape is preferably varied only in its width, i.e. in its dimension parallel to the overall height of the shaft, while the depth of penetration of the grooves perpendicular to the central plane is made the same, i.e. in such a way that in all cases the ground clearance n2x according to Fig. 1a is the same. These specifications are particularly important because in this way you can get the individual shaft profiles and channel profiles with similar broaching and milling tools, which is advantageous for the key shaft manufacturer and the lock cylinder manufacturer. The security against unauthorized imitation of key shafts is nevertheless guaranteed, if only because the milling of the grooves n1 to n4 and m1 to m4 in the side surfaces 10 l and 10 r is very difficult due to the curved surfaces 10 lg and 10rd. In order to be able to mill the grooves in such a way that they match the key receiving channel assigned to them, special clamping tools are required on the groove-milling machines to be used, which are either adapted to the respective curvature surface by complementary contact surfaces or can be adapted by adjustable support tracks .

The storage and possibly the supply of key services can be done in such a way that a set of intermediate key blanks is provided, which consistently have the same envelope profile as one another, as shown in FIGS . 1a to 1e, but differing in the groove design n1 to n4, Differentiate m1 to m4. If such a set of intermediate key blanks, for example for an arrangement according to FIGS. 1a to 1e, is present in the factory warehouse or also at the key service, then only the respective intermediate key blank needs to be selected for a certain key requirement for a specific locking cylinder; on this level variations can then be worked into the breast edge surfaces 10 p and / or the side surfaces 10 l and 10 r.

Further variation possibilities are indicated in FIGS. 2a to 2e. It can be seen in FIGS . 2a to 2e different envelope profiles 10 ba, 10 bb, 10 bc, 10 bd, 10 be. It can be seen in FIGS. 2a rda to the different radii to 2e, rdb. . . , rga, rgb. . . and at the different height coordinates hda, hdb. . . as well as hga, hgb. . . the center of curvature Mrda, billion. . . or Mlga, Mlgb. . . the different variations of the envelope profiles.

It can further be seen from FIGS. 2a to 2e that the angle between the back edge surface 10 da and the arch surface 10 rda, which is designated α in FIG. 2a, is between approximately 70 ° and approximately 100 °, and one can also recognize one Transition angle β between the arch surface 10 rda and the flat surface 10 rpa, which is generally between 140 and 170 °.

By choosing the radii of curvature rda, rga. . . and the height coordinates hda, hga. . . can the transition points between the curved surfaces 10 rda,. . . and the flat surfaces 10 rpa,. . . can also be varied, which are indicated in Fig. 2b at ülb and in Fig. 2c at ülc.

Grooves can also be milled in FIGS. 2a to 2e, as already indicated in FIGS. 1a to 1e. It is possible to use grooving-milling rollers of the same geometry regardless of the respective envelope profile, which is again advantageous for the manufacturer. By choosing different envelope profiles, the number of differently locking locking cylinders can be greatly increased, regardless of whether you want to provide individually locking locking cylinders or locking systems. One can imagine, for example, that a locking system is built from each of the envelope profiles according to FIGS . 2a to 2e, according to the principle of the groove position or dimension variation according to FIGS . 1a to 1e. With regard to FIGS. 2a and 2e, one can also speak of an upper group of locking cylinder groups, each of the individual FIGS. 2a to 2e representing a group with the same shaft envelope profile. Such a group according to one of FIGS. 2a to 2e can then also be divided into several subgroups, each of which is constructed approximately according to FIGS. 1a to 1e, in which within this subgroup the groove distribution is basically similar to the groove dimensioning, but from lock cylinder to lock cylinder or key shaft to key shaft is different. Other subgroups can then differ from the subgroup according to FIGS . 1a to 1e by different groove distribution.

In principle, however, it is also conceivable to group locking cylinders and associated keys in such a way that the groove distribution and dimensioning are basically the same in each group, but the envelope profiles are different. Then could in a locking system from such, for. B. correspond to FIGS. 2a to 2e of the group is constructed, distinguish the individual lock cylinder and the associated key by different Hüllprofile, wherein the parent key would be assigned to the slimmest envelope profile.

For storage in the factory, a central warehouse or The following applies to a locksmith:

For a group of locking cylinders, for example according to Fig. 2a, a set of intermediate key blanks is provided, which consist of the same envelope profile among themselves and which differ from one another according to the individual locking cylinders of the group by different grooves - and / or rib arrangement - for example according to Fig. 1a to Distinguish 1e. For a superordinate group of locking cylinders, i.e. an upper group of several groups of locking cylinders corresponding to several envelope profiles according to FIGS . 2a to 2e, a superordinate set of key intermediate blank sets is then available, the individual key intermediate blank sets differing from one another by a different shaft envelope profile.

If you use the other type of group picture indicated above dung, there is a set of intermediate blanks additionally the same groove arrangement, the individual Intermediate key blanks within the set by below distinguish different shaft cover profiles. Here too again a subgroup formation is conceivable.

One can also consider keeping key pre-blanks in stock, which are only adapted to the respective locking cylinder if necessary by forming grooves. In this case, a set of key pre-blanks with a missing arrangement of the grooves and / or ribs will be kept in stock, the individual key pre-blanks differing in the shape of the shaft cover profile according to FIGS. 2a to 2e.

In Fig. 3 it is indicated that it is in no way necessary to form the curved surfaces 10 lg over their entire height extent with a uniform radius of curvature. Rather, it can be seen in FIG. 3 that upper and lower curvature surfaces 10 lgo and 10 lgu small radius of curvature can be connected to a central curvature surface 10 lgm large radius of curvature.

In FIGS. 4a and 4b it can be seen in each case a lock cylinder 16 having a core hole 18 and a rotatably mounted in this core bore 18 locking cylinder core 20 with a key receiving channel 12 for a key shaft 10. The key shaft 10 has the shape of the key shaft, as shown in FIG. 1, and a corresponding Profilie tion has the key receiving channel 12th The lock cylinder 16 has a lock cylinder housing 24 with a cock profile. In the profile bag 26 of the lock cylinder housing 24 holes 28 are provided for receiving housing pins 30 a. This housing pins 30a are biased by springs 32 in the direction of the axis A of the lock cylinder core 20 to and work with core pins 30 b together. The core pins 30 b are received in corresponding core bores 34 . The core bores 34 cut the key receiving channel 12 . The radially inner ends of the core pins 30 b operate with a profile variation on the breast edge face 10 p of the key shaft 10 together. The design of the profile variation on the pectoral surface 10 p is of a conventional type; it is selected so that when the key 10 is inserted secretly, the housing pins 30 a and core pins 30 b as shown in Fig. 4a, are arranged in the radial direction Rich. Then, 36 is the interface between associated, a Stiftzuhaltungspaar 30 forming a housing pins 30 and core pins 30 b in continuation of the inner circumferential surface of the core bore 18th

If this condition is fulfilled for all pin tumbler pairs arranged one behind the other in the axial direction A - and it is fulfilled if the key adapted for the locking secret is inserted - be turned. The profile variation on the chest edge surface 10 p thus represents an additional possibility of individualizing individual locking cylinders.

Fig. 4a further shows that a mushroom-shaped security pin 40 is received in the locking cylinder core 20 in a remote security pin bore 38 . The meaning of such a safety pin is shown in detail in DE-C2 31 23 511, where reference is made to position 24 . To briefly explain such a safety pin:

The safety pin 40 lies with its inner end cap 40 a on the undamaged arch surface 10 lg of the shaft profile of the key shaft 10 . The total length of the mushroom-shaped safety pin 40 between its inner end cap 40 a and its outer end cap 40 b is chosen so that when the locking cylinder core 20 rotates, the outer end cap 40 b coincides with the inner peripheral surface of the core bore 18 and thus the cylinder core 20 undisturbed via the housing pin bore 28 can be turned away. It is of course assumed that the housing pin bore 28 and the core pin bore 34 are in the same plane orthogonal to the axis A as the safety pin 40th

If an attempt is now made, as shown in FIG. 4b, with a wrong key whose arch surfaces 10 lg 'is ground or filed to rotate the lock cylinder core 20 , this is noticed by the safety pin 40 , in which it is inside the safety pin bore 38 occupies a recessed position. Then, as shown in FIG. 4b, the housing pin 30 a can penetrate radially inwards and engage an edge 44 of a recess 46 in the lock cylinder core 20 and thus inhibit the further rotation of the lock cylinder core 20 . It is thus cylinder achieved by the use of the safety pin 40 an additional security against unauthorized opening of the lock by an unauthorized person, who in order to avoid the key shank adaptation to the channel profile, the curvature of surfaces 10 lg of Fig. 4b 'abrades to a flat surface 10 lg. That two or more of such safety pins can be provided Fig. 4a reveals.

Fig. 5 shows the locking cylinder of Fig. 4a and 4b in a different sectional plane again perpendicular to the axis A. Fig. 5 to recognize a springless auxiliary locking pin 48 with an inner dome 48 a and an outer tip 48 b. Here, a recess 50 is drilled or milled into the curved surface 10 lg or alternatively also into the flat surface 10 lp as part of a profile variation. This recess is so deep in depth to the length of the springless additional locking pin 48 (measured from crest 48 a to crest 48 b) that when inserting the correct lock secret key 10, the crest 48 b tangentially on the outer circumferential surface of the cylinder core 20 and thus also bears against the inner circumferential surface of the core bore 18 . Then the lock cylinder core 20 can be turned through 360 °. If the key 10 is pulled or inserted, the springless additional locking pin 48 is displaced radially outward by the flanks of the recess 50 ( not shown in FIG. 5) and is immersed in a crescent-shaped longitudinal groove 52 on the inner circumferential surface of the core bore 18 . The pulling and inserting of the key 10 is therefore not inhibited as long as the key adapted to the locking secret is used. If a wrong key is inserted, which either has no or only an insufficient depth recess 50 , then the key can either not be inserted at all or the lock cylinder core 20 cannot be rotated because the springless additional locking pin 48 with its tip 48 at the start of a turning attempt b immersed in the crescent-shaped channel 52 .

Springless additional locking pins 48 according to FIG. 5 and safety pins 40 according to FIGS. 4c and 4b can be complementary to one another, as described and illustrated in detail in DE-C2 31 23 511. In addition, the blind pins described and drawn in DE-C2 31 23 511 can also be added (see item 38 in DE-C2 31 23 511). The safety pins, locking pins and optionally blind pins can be arranged throughout in planes orthogonal to the axis A, which also contain the tumbler pin pairs 30 . In the case of springless additional locking pins, however, it is also conceivable that these lie in planes orthogonal to the axis, which are arranged between successive pairs of tumbler pins.

It is readily apparent that with the design measures described with reference to FIGS. 4a to 5, additional individualization options are available for locking cylinders according to the invention, regardless of whether they are used as individual locking cylinders or as parts of a locking system.

In Fig. 5a to Fig 4a detects a key 10 for use in a lock cylinder 16 according. To 5. It can be seen in Fig. 5a, the recesses 50 around the curved surface 10 for cooperation with springless auxiliary locking pins 48 (see Fig. 5) are determined. One recognizes here the possibility of arranging the additional locking pins 48 one behind the other in several planes orthogonal to the axis A and also recognizing the control surfaces 50 a on the edge of the recesses 50 which are intended for pushing back the springless additional locking pins into the crescent-shaped longitudinal groove 52 . One can also see at the tip of the key 10 two ramp ramps 54 , which are also shown in Fig. 5c. These Auflaufram pen serve to insert the spring-free additional locking pins 48 from the position shown in FIG. 5 in the crescent-shaped grooves 52 when inserting the key 10 .

In FIG. 5 a, a handle 56 can also be recognized by the key 10 . This key handle can basically be flat. However, it is also conceivable to continue the profile of the key shaft according to FIG. 5b into the grip area 56 . It depends on the key making method. In principle, the key can be assembled from a shaft section and a grip part 56 by soldering or welding, for example when the key profile is extruded. But it is also conceivable to win the entire key by embossing, the bulge surfaces 10 rd and 10lg being formed by embossing or milling in the shaft region and the flat side surfaces in the grip region 56 .

A further embodiment of a locking cylinder is shown in FIGS. 6a and 6b. Analog parts are designated by the same reference numerals as in FIGS. 1 to 5. In this embodiment, a key 110 with a shaft profile corresponding to that in FIGS . 4a to 5 can again be seen . In this embodiment, in orthogonal planes to the axis A, which are opposite the levels of the tumbler pin pairs are axially offset, locking lever 160 pivotally mounted about locking lever pivot pins 162 . For details of this embodiment, reference is made to EP-A2 237 799. The following brief explanation is sufficient:

The locking levers 160 are pivotable about the pivot pins 162 . The two ends 160 a and 160 b of the swivel lever 160 are designed as engagement hooks for engaging in recesses 165 and 167 on the inner circumferential surface of the core bore 118 . The ends 160 a are designed to scan the curvature surfaces 110 lg and 110 rd; They feel over styli 166 , which are in contact with the intact shaft profile of the key 110 which fits the secret of the lock in the area of the curved surfaces 110 lg and 110 rd, namely under the action of the compression springs 168 , which act on the lower ends 160 b of the locking lever 160 . If the correct lock secret key is inserted, the two ends 160 a and 160 b are flush with the inner circumferential surface of the core bore 118 , so that the lock cylinder core 120 can be rotated, provided that the other requirements for the rotatability of the lock cylinder core are met. If a wrong key, for example a filed key 110 'with ground side surfaces 110 lg' and 110 rd 'is inserted, the locking levers 160 are pivoted into the pivot position shown in FIG. 6 b, so that the lower ends 160 b into the recesses 167 hook and the rotation of the lock cylinder core 120 on which the locking lever 160 are mounted is blocked.

The locking levers 160 are accommodated in axially normal slots 170 of the locking cylinder core 120 . These slots 170 are expanded by bores 172 . You can either provide a locking lever 160 in a slot 170 or - with the locking lever omitted - insert a security pin into the bore 172 that belongs to this slot, as shown in FIGS . 4a and 4b at 40 and with this security pin Scan curvature surfaces 110 lg or 110 rd and achieve a similar blocking effect as shown in Fig. 4b and described in the associated description.

In Fig. 7 a further embodiment of a locking cylinder is shown. However, this can also be a section through the arrangement according to FIG. 6 in another orthogonal plane. Here again, locking levers 260 are shown, which use profile pins 266 to scan profile variations in the region of the curvature surfaces 210 lg, 210 rd. These profile variations are shown in Fig. 7 in the form of recesses 250 designated net. If the correct locking secret fit key 210 is inserted, the locking lever 260 are adjusted in their pivot position so that they are with their ends 260 a and 260 b out of engagement with the recesses gene 265 and 267 and the lock cylinder core can be rotated. If an incorrect key is inserted, the recesses 250 are not matched to the closing secret, in each case engages one of the ends 260 a in one of the Ausneh, rules 265 267, with the result that the lock cylinder is blocked one. Here too, reference is made to the details of EP-A2 237 799 for details. It can be seen that the locking levers according to FIGS . 6a, 6b or / and FIG. 7 can also be used to further drive the individualization of the locking cylinders and keys.

In Fig. 7a to 7c can be seen a key shaft 210 , which has an upper row of recesses 250 for interacting with the stylus 266 and a lower row of recesses 251 for interacting with springless additional locking pins, which can be accommodated in the slot-enlarged holes 272 bores , as long as no locking levers are assigned to the respective slots. At the key selspitze in Fig. 7a and Fig. 7c can be seen again Introductory bevels 254 , which push the feeler pins 266 or the springless additional locking pins of the bores 272 to the outside when the key 210 is inserted.

With reference to FIGS. 5a, 5b and 7a, 7b, it should also be noted that the concave curvature of the key side faces also makes the drilling of the recesses or spherical caps, insofar as these are in the convexly curved regions, more difficult because of the drill tries to slide, unless a device for the respective key shaft with an adapted guide for the respective drill or milling cutter is available.

Regarding the height of the vaulted surfaces, it should also be noted that this prefers about two thirds of the total shaft height h extends. The heights of the vaulted surfaces can increase both sides of a key are the same or different his.

Claims (33)

1. lock cylinder ( 16 ) with key ( 10 , 56 ), the lock cylinder comprising a lock cylinder housing ( 24 ) with a housing bore ( 18 ), which has a core drilling axis (A) and one in the core bore ( 18 ) about the core bore axis (A ) rotatably mounted cylinder core ( 20 ) which has a key receiving channel ( 12 ) with a channel profile which is essentially parallel to the core bore axis (A),
the key comprising a key handle ( 56 ) and a key shaft ( 10 ) with a shaft axis (A) and with a shaft cover profile ( 10 b), the shaft cover profile ( 1 Ob) containing a central plane (EE) containing the shaft axis (A), has a back edge surface ( 10 d), a chest edge surface ( 10 p) and two side surfaces ( 10 l, 10 r) on both sides of the central plane (EE), which measures a shaft height measured orthogonal to the shaft axis (A) and along the central plane (EE) ( h) and define a shaft width ( 2 S) that is measured orthogonal to the median plane (EE) and along the shaft height (h),
wherein at least one side surface (10l, 10r) has at least part of the shaft height (h) at least one convex-cylindrical curvature surface ( 10 lg, 10 rd) parallel to the shaft axis (A) and at least on one of the side surfaces ( 10 l, 10 r) to the shaft axis (A) parallel grooves (n1-n4, m1-m4) or / and ribs are formed, which in connection with the shaft sleeve profile ( 10 b) result in a channel profile adapted shaft profile ( 10 a) ,
characterized in that the at least one convex-cylindrical curvature surface ( 10 lg, 10 rd) has a maximum radius of curvature (rg, rd) at least in a partial area running parallel to the shaft axis (A), which radius is greater than the distance (S) thereof Part of the middle level (EE). 2. Lock cylinder according to claim 1, characterized in that the shaft height (h) is at least 2 times, preferably at least 2.5 times as large as the maximum shaft width ( 2 s) and / and that the maximum radius of curvature (rg, rd) approx 1.5 times to about 6 times the maximum shaft width, preferably at least 2.5 times to at least 5 times. 3. Lock cylinder according to one of claims 1 and 2, characterized in that the two side surfaces ( 10 l, 10 r) each have at least one arch surface ( 10 lg, 10rd). 4. Lock cylinder according to one of claims 1 to 3, characterized in that the curvature surface ( 10 lg, 10 rd) has the maximum radius of curvature (rg, rd) over its entire height extent. 5. Lock cylinder according to one of claims 1 to 3, characterized in that the curvature surface ( 10 lg) has different radii of curvature over their entire heights (corresponding to 10 lgm, 10 lgo, 10 lgu). 6. Lock cylinder according to claim 5, characterized in that the curvature surface ( 10 lg, 10 rd) in a central part ( 10 lgm) of its vertical extension has the maximum radius of curvature and in at least one end region ( 10 lgo, 10 lgu) of its vertical extension has a smaller radius of curvature. 7. Lock cylinder according to claim 1 to 6, characterized in that the at least one side surface ( 10 l, 10 r) in one of the back edge surface ( 10 d) close envelope section is formed as a curvature surface ( 10 lg, 10 rd) and in an envelope section close to the chest as flat surface ( 10 lp, 10rp). 8. Lock cylinder according to claim 7, characterized in that the plane surface ( 10 lp, 10rp) of the breast-close Hüllpro filababschnittes obliquely or approximately parallel to the central plane (EE). 9. Lock cylinder according to one of claims 7 to 8, characterized in that the curvature surface ( 10 lga, 10 rda) of the envelope profile section near the back with a transition angle near the back (α) of between approximately 70 and approximately 100 ° in the back edge surface ( 10 there) passes. 10. Lock cylinder according to one of claims 7 to 9, characterized in that the curvature surface ( 10 lga, 10 rda) of the envelope profile section close to the back with a near-breast transition angle (β) of between approximately 140 ° and approximately 170 ° in the plane surface ( 10 rpa) of the envelope profile section close to the breast passes over. 11. Lock cylinder according to one of claims 1 to 10, characterized in that the shaft envelope profile ( 10 b) has approximately the shape of a bottle outline. 12. Lock cylinder according to one of claims 1 to 11, characterized in that the back edge surface ( 10 d) is adapted to the radius of the core bore ( 18 ). 13. Lock cylinder according to one of claims 1 to 12, characterized in that the chest edge surface ( 10 p) for controlling spring-loaded tumbler pin pairs ( 30 a, 30 b) is designed to vary in level. 14. Locking cylinder according to one of claims 1 to 13, characterized in that at least one of the side surfaces ( 10 l, 10 r) with a locking element or security element ( 40 ; 48 ; 160 ) influencing the rotational mobility of the cylinder core ( 20 ; 120 ; 220 ) ; 260 ) of the cylinder core ( 20 ; 120 ; 220 ) cooperates. 15. Lock cylinder according to claim 14, characterized in that at least one of the side surfaces ( 10 l, 10 r) cooperates with at least one springless additional locking pin ( 48 ) of the cylinder core ( 20 ). 16. Lock cylinder according to claim 14 or 15, characterized in that at least one of the side surfaces ( 10 l, 10 r) cooperates with at least one security pin ( 40 ) of the cylinder core ( 20 ). 17. Lock cylinder according to one of claims 14 to 16, characterized in that at least one of the side surfaces ( 110 l, 110 r, 210 l, 210 r) with a locking lever ( 160 , 260 ) mounted on the cylinder core ( 120 ; 220 ) cooperates. 18. Lock cylinder according to one of claims 14 to 17, characterized in that at least one of the side surfaces ( 10 l, 10 r) in the region of a key shaft tip with an insertion bevel ( 54 ; 254 ) is provided. 19. Key ( 10 , 56 ) for a locking cylinder ( 16 ) according to one of claims 1 to 18. 20. A group of locking cylinders of different locking secrets, each with an assigned key according to one of claims 1 to 18, characterized in that the shaft envelope profiles ( 10 b) of the individual locking cylinders belonging to the group of keys ( Fig. 1a-1e) are identical. 21. A group of lock cylinders according to claim 20, characterized in that the key shafts of the individual lock cylinders of the same profile (FIGS . 1a-1e) of the group are different from one another by different grooves (n1-n4, m1-m4) and / or ribs on at least distinguish one of the side surfaces ( 10 l, 10 r) and / or by different profile variation of the chest edge surface ( 10 p) or / and by different profile variation of at least one side surface ( 10 l, 10 r). 22. A group of locking cylinders ( Fig. 1a-1e) according to one of claims 20 and 21, which forms a hierarchically structured locking system. 23. A sub-group of locking cylinders ( Fig. 1a-1e) within a group of locking cylinders according to one of claims 20 to 22, characterized in that within the sub-group ( Fig. 1a-1e) the distribution of the grooves (n1-n4, m1-m4) or / and ribs across the side surfaces ( 10 l, 10 r) for the different locking cylinders ( Fig. 1a-1e) is fundamentally similar, the cross-sectional dimensions of each other with respect to their position corresponding grooves (n1-n4, m1-m4 ) or / and ribs, however, are at least partially different from the locking cylinder ( FIG. 1a) to the locking cylinder ( FIG. 1e). 24. A sub-group of locking cylinders according to claim 23, characterized in that the corresponding grooves (n1-n4, m1-m4) and / or ribs of the individual locking cylinders ( Fig. 1a-1e) are geometrically similar in cross-sectional shape, but are different in their cross-sectional size. 25. A subset of lock cylinders according to claim 24, characterized, that the corresponding in terms of their location Grooves (n1-n4, m1-m4) and / or ribs in their width measured differently in the direction of the shaft height (h) are, in their penetration depth (n2x) perpendicular to the middle level (E-E), however, are equal to each other. 26. An upper group of lock cylinder groups ( Fig. 2a-2e) according to one of claims 20 to 25, characterized in that the individual groups ( Fig. 2a-2e) within the upper group by different shaft cover profiles ( 10 ba, 10 bb, 10th bc..) and differentiate these corresponding channel profiles. 27. An upper group of lock cylinder groups according to claim 26, characterized in that the shaft envelope profiles ( 10 ba, 10 bb...) Of the individual groups ( Fig. 2a-2e) from each other by under different radii of curvature (rda, rdb...) differentiate the areas of the dome ( 10 lga, 1 lgb...) and / or different center positions (Mrda, billion,...) of the centers of curvature of the dome areas ( 10 lga, 10 lgb...) or their subareas. 28. A group of lock cylinders with associated keys, characterized in that the lock cylinders within the group have different envelope profiles ( 10 ba, 10 bc), while the grooves and / or ribs at least in their cross-sectional areas close to the central plane of the lock cylinder ( Fig the group (Fig. 2a-2e) are of identical design. 2a) (at lock cylinder Fig. 2c). 29. An upper group of lock cylinder groups according to claim 28, characterized in that the individual groups (for example the group of FIGS. 2a-2e) are in principle the same position of the grooves and / or ribs in the individual groups (z. B. in the group of Fig. 2a-2e) by different cross the grooves and / or ribs sectional shapes differ from each other (corresponding to the differences between Fig. 1a and Fig. 1e). 30. A set of intermediate key blanks for keys to lock cylinders of a group according to one of claims 20 to 25, characterized in that the intermediate key blanks of the set ( Fig. 1a-1e) mutually the same envelope profile ( 10 b) and different groove or / and rib arrangement on at least one side surface ( 10 l, 10 r). 31. A higher-level set of key intermediate blank sets (each one of these sets corresponding to one of FIGS. 2a-2e) according to claim 30, characterized in that the key intermediate blanks of the individual intermediate blank sets differ from one another by differing shaft shell profile ( 10 ba, 10 bb.. ) differentiate. 32. A set of key blanks with still missing arrangement of the grooves and / or ribs for keys of the upper group of lock cylinder groups according to claim 26 or 27, characterized in that the key blanks of the individual groups (each a group corresponding to one of FIGS. 2a-2e ) by different shape of the shaft cover profile ( 10 ba, 10 bb,...) 33. A set of key intermediate blanks for keys of a group of lock cylinders according to claim 28, characterized in that the intermediate blanks of the individual lock cylinder in the group (corresponding to FIGS . 2a-2e) with identical shape of the grooves (n1-n4, m1 -m4) or / and ribs at least in their cross-sectional areas close to the central plane differ from one another by different shape of the shaft envelope profile.