EP1503010B1 - profiled cylinder with key - Google Patents

Abstract

A typical master key may be made from a blank (1) with a rectangular-section end and a wide groove on each side (5,6) for most of its length. There are oppositely-offset ribs (3,4) on the edges, and the corner of the rectangle adjacent to the rib is cut away forming guide ribs (7). Other shapes with several grooves in the sides may be used.

Description

The invention relates to a key and an associated standardized profile cylinder. Keys are known in which all cuts are made only over a partial width of the key back ( GB-A-1543940 ).

For the present invention, it is assumed that keys for standardized profile cylinders are generally known from DIN 18252.

These are the standard profile cylinders lock cylinder, which are intended to interchangeable in purpose locks, z. B. mortise locks according to DIN 18251, to be used.

Such keys are usually inserted into the keyway of the standard profile cylinder. They point at their key-chest opposite the key-back is located on incisions, which serve to align the pin tumblers provided in the profile cylinder.

An access-authorized key aligns the pin tumblers so that they stand with a separation plane in the peripheral surface of the lock core, so that the lock core can then be rotated.

Such keys are made from so-called key blanks. A key blank is initially bounded on its key breast, ie where the incisions are to be made, by a straight-line envelope extending between the key tip and the key crayon. The depth of the cuts varies from position to position, depending on the closure used in the profile cylinder. By means of a copy-milling machine, the individual incisions are scanned one after the other and transferred to the new key blank via a correspondingly configured milling disc.

In this way it is relatively easy to produce duplicate keys.

However, this can not always be in the sense of the one who has a legitimate interest in the access security of his belonging lock cylinder.

This also applies in particular to owners of master key / general master key systems with group-wise access authorization to predetermined lock cylinders. In this regard, the DIN 18252 requires the manufacturers that the respective key blanks may not be circulated. Replenished keys must then not only ensure a technically flawless function in master key / master key systems but also reduce security risks.

Although a key blank within the meaning of DIN 18252 is to be understood as a semifinished product provided with the longitudinal profile of the key to be copied, in which subsequently only the notches for aligning the pin tumblers must be inserted, a major danger is seen therein by means of more recent developments occurring profile milling machine to mill such a manufacturer-bound key blank from a simple rectangular profile.

However, regardless of the question of the admissibility of this procedure, it would open the door to the production of unauthorized replacements and replacement keys.

It is therefore an object of the present invention to provide measures by means of which the copying of such keys can be effectively prevented even using profile milling machines.

This object is achieved by the invention with the features of claim 1.

Basically, the measures of the present invention lead to the conventional copy milling for producing the cuts in the key-chest to a difficult to even impossible scanning of the respective incision depth. At least the deep cuts are in fact covered by the protective wall, which is arranged immediately laterally next to the incisions. If you want to make a copy of a key according to this invention by conventional means, therefore, the protective wall must first be destroyed. However, since the key crops according to the rules DIN 18252 is to be provided with a corresponding identification, which identifies the key as a master key or general master key, can not be produced in a fair way replacement and additional key, without the original key has been improperly changed by removal of the protective wall.

It is sufficient to provide only a single incision in the key back with the laterally arranged protective wall. In addition, embodiments are given, in which the protective wall is effective only for incisions from a certain depth of incision.

The protective wall is located on only one wide area of the key. It covers the incisions from this side in such a way that no sharp-edged points are created, which can cause injuries or damage to the clothing.

Looking at the key in cross-section, the protective wall should be located at two diagonally opposite corners of the key profile.

In this way, one obtains a key that can be inserted into two angular positions offset by 180 degrees in the profile cylinder.

In a first embodiment, this key can be configured as a so-called reversible key, which closes one and the same profile cylinder regardless of its insertion position.

In a further embodiment, the key - depending on its respective insertion position - actuate two different profile cylinder with independent locks.

The protective wall thus extends only on one side of the key cross-section and can therefore be configured in a straight line from the key tip to the key ridge. In this way, the protective wall is used to guide the key profile in the keyway, which additionally at the foot of the protective wall, an additional guide rib can be provided which can be produced by simple longitudinal milling at the foot of the protective wall by conventional means.

In this case, the key fits over its entire width flush in the key channel and is also performed in the area of the protective wall on the wall of the key channel.

Since the protective wall carries on its side facing away from the wall of the key channel side incisions, there is an additional Kopiererschwernis because there the wall width of the protective wall is crucial for the technically perfect function of the key.

Although the wall width of the protective wall may vary for the various cuts, a preferred embodiment refers to a consistent wall width for all cuts.

This measure facilitates warehousing and logistics as it requires pin tumblers of identical diameters.

If, moreover, that longitudinal edge of the protective wall which points outwardly with respect to the broadside of the key is rounded off, it is advisable to configure the profile of the keyway to be complementary thereto.

This measure additionally reduces the risk that such keys are copied with profile milling machines.

The respective transition radii on the guide ribs and the profile-varying ribs may also differ from each other to further reduce the risk of improper copies.

This fact is particularly seen under the aspect that guide ribs are copied as well as the profile-varying ribs with such Profilfräsautomaten in reduced cross-section, in which case, however, the leadership of the key in the closing channel is significantly deteriorated because the key receives an illegal game in the key channel, and in this way a proper function of the key is no longer guaranteed.

Against this shortcoming also provided in the profile milling digitalization of the key cross section nothing helps, since the digitization always leads to key longitudinal ribs, which are smaller in cross-section than the manufacturer's default cross sections, so that the function such inadmissibly copied duplicate / spare key must be in question.

In addition, the wall width of the protective wall can be dimensioned so that the core pins of Stiftzuhaltung on the side facing the incisions of the protective wall, a contact surface is provided, which forms a play-free sliding fit with the lateral surfaces of the core pins. If the wall width of the protective wall becomes larger than the wall width of the original if this key is copied inappropriately, the key fails its service. If the wall width, however, smaller than the wall width of the original, the leadership of the core pin, especially in fully extended state alone of the associated Bore in which the core pin is slidably guided, be adopted.

In addition, a reduced wall thickness leads to a weakening of the key cross-section at this point, since it should also be considered that so-called reversible keys each having opposite cuts, of which the deep cuts lead to a weakening of the key in this area.

Here, however, the invention provides a remedy because the protective wall reinforces and stabilizes the key cross-section, especially in the area of the deep cuts.

An inadmissibly copied key with a reduced thickness of the protective wall at this point therefore also offers only a reduced stability, which leads to a further weakening of the key cross-section, especially in the case of inadmissible secondary keys / replacement keys, which were produced with a profile milling machine.

The protective wall on a key according to the present invention therefore fulfills a dual function.

On the one hand it prevents that an original key can be copied by simple filing or usual milling. This is only possible with conventional devices with destruction of the protective wall.

On the other hand, it is between the standing in only a single row pin tumblers of the profile cylinder and the outer wall of the keyway and must therefore be limited in width.

In addition, it offers in the deep cuts to reversible keys, which naturally must be assigned an equally deep incision on the opposite side, significantly improved stability and also prevents spikes in the key, which can lead to injury or damage to textiles.

In one embodiment, 7 different cutting depths are provided for such a key, wherein z. B. the incisions are introduced with the small depths 0 to 3 in the additional longitudinal ribs, which are provided on a key blank according to claim 10, while the incisions with the large depths 4 to 6 are laterally adjacent to the protective wall.

Special attention is therefore paid to a key blank, since the additional longitudinal ribs on the two transverse sides provide the incisions of small depth without and the incisions of great depth with a protective wall.

It arises from such key blank therefore a key with incisions of different qualifications, depending on the depth of incision, so that copies only by different processing methods - depending on the respective incision depth - can be produced.

If the outside foot of the additional longitudinal ribs offset by a predetermined amount to the inside, it is advisable to provide there a guide rib. Possibly. the foot area between the longitudinal rib and the guide rib is rounded with a predetermined radius and a corresponding rounding provided in the key channel, in addition to complicate the production of "exactly matching" key blanks on profile milling machine.

If such a key blank provided with the longitudinal ribs according to claim 10, it is advisable to provide the protective wall on the side opposite the longitudinal ribs side of the key blank. In this way, the incisions can be made with a small depth in the longitudinal ribs, while with the introduction of the cuts of great depth, the protective wall according to the present invention automatically arises.

In addition, it is proposed to provide an additional longitudinal groove in the key transverse surface between the longitudinal ribs and the protective wall, which corresponds to a corresponding projecting longitudinal rib in the keyway.

The inadmissible production of additional keys or spare keys is thus further complicated.

It is important that the keyway is offset by a partial width of the key in the direction of the protective wall which acts on the pin tumblers when the key is inserted. The key channel is thus offset from the diametrical plane in which the pin tumblers are laterally offset. In this way arise for the core pins where the keyway cuts the core holes, additional contact surfaces that serve the Hubbegrenzung of the core pin.

Due to the lateral offset of the key channel with respect to the diametral plane of the lock core can be on that Side of the keyway, which faces the stop surface of the core pins, accommodate the protective wall of the invention and it can be so fulfill the additional safety functions.

Fig.1a bis 1c

Schlüsselprofile für General-Hauptschlüsselanlagen,

Fig.1d bis 1f

Schlüsselprofile für Zentralschließanlagen,

Fig.2a bis c

Beispiele für unterschiedliche Schlüssel,

Fig.3a bis c

Wendeschlüssel im Zylinderkern, Zylinderkern und Schlüssel mit parazentrischem Profil,

Fig.4a bis c

Gruppenhauptschlüssel höchster Profilordnung mit Zylinderkern, Zylinderkern und Schlüsselprofil,

Fig.5a bis c

Wendeschlüssel mit Zylinderkern, Zylinderkern und Schlüsselprofil mit zusätzlichen Längsrillen,

Fig.6a

Der erfindungsgemäße Schlüssel im eingesteckten Zustand,

Fig.6b

Der Profilzylinder gemäß Figur 6a ohne Schlüssel,

Fig.6c

zugehöriges Schlüsselprofil zu Fig.6b im Querschnitt,

Fig.7a

Profilzylinder aus einer Schließanlage für einen Schlüssel nach der vorliegenden Erfindung,

Fig.7b

Profilzylinder gemäß Figur 7a mit einem eingesteckten Schlüsselrohling,

Fig.8a

Den Profilzylinder gem. Figur 7a mit zutrittsberechtigtem Schlüssel mit übergeordnetem Profil,

Fig.8b

Den Profilzylinder gem. Figur 7a mit nicht zutrittsberechtigtem Schlüssel.

In the following the invention will be explained in more detail with reference to embodiments. Show it:

1a to 1c

Key profiles for general master key systems,

Fig.1d to 1f

Key profiles for central locking systems,

2a to c

Examples of different keys,

3a to c

Turning key in the cylinder core, cylinder core and key with paracentric profile,

4a to c

Group key of highest profile order with cylinder core, cylinder core and key profile,

Fig.5a to c

Reversible key with cylinder core, cylinder core and key profile with additional longitudinal grooves,

6a

The key according to the invention in the inserted state,

Figure 6b

The profile cylinder according to FIG. 6a without a key,

6C

associated key profile too Figure 6b in cross section,

7a

Profile cylinder from a key system according to the present invention,

Figure 7b

Profile cylinder according to Figure 7a with an inserted key blank,

Figure 8a

The profile cylinder gem. Figure 7a with authorized key with superordinate profile,

8B

The profile cylinder gem. Figure 7a with an unauthorized key.

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

The 1a to 1f show different bowl cross sections, which can be produced from one and the same raw key.

This shows 1b shows a raw key of rectangular cross-section. From this, the key blanks 1 shown can be produced by removing the hatched area.

The following is then spoken of a key blank 1, when its cross section is determined by a rectangular envelope 2, wherein two diagonally opposite corners of the two transverse sides of the rectangular envelope 2 two identical longitudinal ribs 3,4 are provided. In addition, the two longitudinal sides 5.6 of the rectangular envelope 2 serve the variation of the key longitudinal ribs.

This shows Figure 1C a first embodiment in which a total of 8 key longitudinal ribs are variable, namely the key longitudinal ribs 8.1 to 8.8.

Since this is a reversible key in the present case, on the opposite longitudinal side 5, the variable longitudinal key ribs are initiated in opposite directions to the key longitudinal ribs on the second longitudinal side 6.

In the embodiment according to Fig.1f However, a total of 9 key longitudinal ribs are variable, the 9.1. to 9.9 are initiated.

In this case, the number of variable key longitudinal ribs depends on the height 9a or 9b, resulting from the distance between the longitudinal rib 3 and 4 forming the respective key back and the flank of the first guide rib 7, 7 '.

In the case of Figure 1c this distance 9a is greater than in the embodiment 9b of FIG. 1f , so that the number of variable key longitudinal ribs in the case of FIG. 1f increased accordingly.

In addition, the longitudinal ribs 3 and 4 jump with respect to the longitudinal sides 5, 6 of the key blank 1 by an offset 10 inwards. This results in the foot of the longitudinal ribs 3,4 each have a guide rib 7, which serves to guide the finished key in the keyway of the lock cylinder.

Since the height of the longitudinal rib 3, 4 up to the first edge of the guide rib, ie the point where the guide rib begins, is different in both embodiments and should allow different rib variations, the longitudinal ribs 3,4 project on the outer sides of the key in that area into which is encircled by the rectangular envelope 2, while at the same time the height 11 of the respective longitudinal rib in both embodiments on the opposite side is the same size.

This can be realized on the heights of the longitudinal ribs to the guide rib different profile families, while at the same time the main dimensions of such Rohschlüssel as shown in FIG FIG. 1b identical match. This guide rib is not a variation rib but always rigid within a profile family, for example within the profile series of a general master key system. The guide rib is usually manufactured with very narrow tolerances compared to the variation ribs.

According to the invention, a protective wall 20 is now provided which is arranged on the side of the key blank 1 opposite the longitudinal ribs 3, 4.

The edges 12 opposite the respective longitudinal ribs 3, 4 are therefore part of each of these two protective walls 20, since the key cuts, as will be shown in more detail, do not extend over the entire width of the rectangular envelope 2.

This shows FIG. 1b by way of example, a recess penetrating the longitudinal ribs 3 and 4, which extends into the material of the key blank 1 beyond the foot region of the longitudinal ribs 3, 4. However, the width of the recess is smaller than the total width of the rectangular envelope 2, so that here on the longitudinal ribs 3 and 4 opposite side of the key blank 1 remains a protective wall 20, which is the subject of the present invention and which lies within this residual width.

In addition, the show FIGS. 1c, 1f the possibility of providing an additional longitudinal groove 13 in the longitudinal area of the key between the longitudinal ribs 3, 4 and the edge 12 opposite the longitudinal ribs on the key transverse surface, which corresponds to an additional longitudinal rib in the keyway provided on the side of the pin tumblers in the lock cylinder.

The additional Längrille 13 requires in the production of the key blank a separate operation and must also be made precisely with regard to the profile adapted additional longitudinal rib in the keyway.

In the embodiment according to FIG. 1a all variation ribs are removed.

A key to this cross section would therefore fit as master key in all associated lock cylinder.

The two embodiments according to Figures 1d, 1e are up to the variation rib 9.7 of the same profile. As in the embodiment according to Figure 1e However, the variation rib 9.7 is missing, is in this embodiment, a parent key that can be inserted into a lock cylinder, which according to the key cross-section Figure 1d adapted but not vice versa.

In this case, it may be an example of a central locking system.

Starting from this, the figures show further details of the invention.

The following is based on the Figures 6a to 8b once discussed the interaction between the key according to the invention and a standardized profile cylinder.

To show the Figures 6a and 6b Side view of the lock core of a profile cylinder with pin tumblers, which consist of core pins 21 and cylindrical pins 22.

The plane of rotation of the lock core is denoted by 23. If the separation planes between core pins 21 and cylinder pins 22 are aligned so that all coincide with the plane of rotation 23, the lock core can be rotated in the profile cylinder.

The embodiment acc. 6a this shows a key 25, which is behind the rectilinear envelope 26 (see 2a, b ) between key top 27 and key chalk 28 recessed cuts 29a - 29f, which serve to align the lying in a diametral plane of the lock core 30 and there in a row successively Stiftzuhaltungen 21; 22 serve.

The pin tumblers 21, 22 lie here in the plane of the paper, which coincides with the diametral plane of the lock core 30.

Seen from the left side, the cuts of the key 25 are alternately deep, high, deep, high, deep, high.

It can be seen that the pin tumblers designated "deep" are seated in the key with great depth in the cuts. The tips of the core pins are covered by the protective wall 20, which lies here above the plane of the paper. This is possible because the incisions with great depth extend only over a partial width of the key back, so that the remaining width of the key back not covered by the portion of the incisions can form a protection wall 20 laterally projecting beyond the incisions.

In this case, the protective wall 20 extends in a straight line between the key tip 27 and key crest 28th

The pin tumblers designated "high", however, are seated in incisions which are made in the longitudinal surfaces of the longitudinal ribs 3 and 4, which are located at the top or at the bottom.

Figure 6b shows the situation without a key.

The pin tumblers have been retracted in the direction of the key channel so far by the pressure springs acting upon them, that the plane of rotation 23 of the Cylindrical pins 22 each individual pin tumbler is severed and thus a rotational movement of a lock core is impossible.

The 6C shows the associated profile of the key. It can be seen that one of the longitudinal ribs 3 and 4, since it is a reversible key moves along the lower longitudinal edge of the keyway 31, while the longitudinal edge of the upper longitudinal rib 4 and 3 parallel to a corresponding recess in the upper region of the keyway is displaceable.

The protective wall 20 is seen over the entire length of a rectangular plan view and with respect to the broadside of the key, in the present case, at the longitudinal ribs 3,4 opposite edges 12 is not rounded.

In addition to this show the Fig.7a to 8b more details.

7a shows the lock cylinder, suitable for a key according to the present invention, without an inserted key.

It is the profile cylinder from a locking system, as can be seen from the post pins. The construction pins 21b, c together with the core pin 21 form a three-part core pin configuration with a total of three possible access positions, which are to be aligned depending on the respective recesses in the key in terms of the rotational mobility of the lock core.

Furthermore, it can be seen that the pin tumblers are arranged in a diametral plane 32 of the lock core 30.

This means that the longitudinal center line of the pin tumblers extends through the center of rotation of the lock core 30.

Furthermore, it can be seen that the keyway 31 is offset from the diametral plane 32 of the lock core 30 in the direction in which the protective wall 20 of the inserted key 25 shows.

In this way arises for the conical tip of the core pin, which comes to lie directly on the wall of the lock core, a "rich" bearing surface 33, which serves to limit the stroke of the core pin.

Figure 7b also shows the profile cylinder according to 7a with inserted key blank. The tip of the core pins 21 is aligned in a straight line through the longitudinal edge of the longitudinal rib 4. However, since the key blank does not have the correct incision depths, it does not come to the rotational mobility of the lock core.

Also in the case of FIG. 8b this applies accordingly. Here a non-authorized key is inserted, the incision depths are not set to the dividing planes of Stiftzuhaltung.

The lock core can not be turned.

In the embodiment according to Figure 8a is a parent key shown. This parent key has no profile variations but has the smallest cross section of the entire family of keys that fits into all key channels of all associated profile cylinders.

The protective wall 20 abuts with a lateral contact surface 34 against the core pins 21 of the pin tumbler. The Width of the protective wall 20 is made in the sense of a longitudinal and transverse sliding freedom between its pin tumblers facing surface and the keyway 31 corresponding to its contour recess.

Qualitatively show the Fig.7a to 8b In addition, that the lateral offset between the keyway 31 and diametral plane 32 of the lock core is about 1/4 of the key width.

In the following, various exemplary embodiments of the interaction between the key and the key channel will now be described with reference to FIG FIGS. 3a to 5c ,

The 3a to 3c show a reversible key with paracentric profile. It can be seen that longitudinal ribs of the keyway overlap in the vertical direction. This offers the advantage of difficult scanning of the pin tumblers (not shown).

The keyway 31 matches in its profile exactly with the cross-sectional profile of the key 25.

In the embodiment according to 4a to 4c a master key of the highest profile order is inserted into a keyway 31 provided with variation ribs.

The cross-section of the main master key corresponds to the smallest possible cross-section of the key channel, while the three-piece core pin configuration of core pin 21 and the existing post pins 21b, c, the closure of the lock cylinder is adapted to the existing in this level of the closing incision depth of the master key.

Such a master key would also fit into a key channel corresponding to 4b and 5b on its side facing the pin tumblers an additional longitudinal rib 35 which corresponds to achieve a selective access authorization in a subordinate key with an additional longitudinal groove 13 of the key profile (s. 5c ).

One recognizes that the general master key according to Figure 4 corresponds to the inner profile of the keyway 31 (dash-dotted line shown area), while at the same time the protective wall 20 is realized by the respective necessary cutting depths for the individual pin tumblers.

The embodiment according to 5a shows a key with single profile, as it could occur in a general master key locking system.

It is a subordinate key whose variation of the key longitudinal ribs 8.2, 8.4 and 8.6 are adapted to the contour of the key channel 31 with 8.7.

In addition, the key profile has an additional longitudinal groove 13, which corresponds to a corresponding longitudinal rib 35 in the keyway 31.

In addition to this show the 2a to 3c further key examples.

These are reversible keys. The secondary figures show the respective key profile.

In the embodiment of 2a three deep cuts in the area of the key tip are provided, which are each flanked by a protective wall 20.

The other three incisions in the direction of the key crop are shallow cuts provided in the longitudinal ribs 3, 4.

The key is designed as a reversible wrench, which provides access in two mutually offset by 180 degrees insertion positions in one and the same profile cylinder admission.

The profiling of the key has the variation serving longitudinal ribs 8.1, 8.3, 8.5 and 8.6. Thus, this key is of minor qualification.

The embodiment according to 2b does not have these keyed longitudinal ribs serving the variation. This key fits into keyways of any number and arrangement of variation ribs of the same key profile series.

Only the dimensionally particularly tightly tolerated guide ribs 7 are shown.

In contrast to the embodiment according to 2a The three incisions of shallow depth are provided in the area of the key tip. There they are located on the longitudinal edges of the longitudinal ribs 3,4.

The large depth cuts are located in the key ridge facing the end of the key back. There, the protective wall 20 is formed by the incision depth.

In addition, shows Figure 2c an embodiment as a reversible key, which is usable in two mutually offset by 180 degrees insertion positions.

The cuts on the opposite key longitudinal sides are not identical.

Accordingly, each insertion position is assigned to another profile cylinder with a different closure.

It is again a master key, recognizable by the missing variation ribs.

So that the user can recognize the insertion position of the key, additional, easily tactile markings 37 are provided on the key grain, which serve to recognize the respective insertion position.

LIST OF REFERENCE NUMBERS

1

key blank

2

rectangular envelope

3

first longitudinal rib

4

second longitudinal rib

5

first longitudinal side

6

second long side

7,7 '

guide rib

8.1

the variation serving key rib (4 of 8)

8.2 8.3 8.4 8.5 8.6 8.7 8.8 9.1

the variation serving key rib (4 of 9)

9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 9a

Height of the longitudinal rib up to the first flank of the guide rib of a profile series, for example for general master key systems

9b

Height of the longitudinal rib to the first edge of the guide rib another profile series for example for central lock systems

10

Offset to the inside

11

Height of the longitudinal rib

12

Edge of the longitudinal rib opposite

13

additional longitudinal groove

20

bulkhead

21

core pin

21b, c

construction pins

22

straight pin

23

plane of rotation

24 25

key

26

envelope

27

key tip

28

key grip

29a

receding cuts

29b 29c 29d 29e 29f 30

lock core

31

keyway

32

diametrical plane

33

"rich" bearing surface

34

lateral contact surface

35

additional longitudinal rib

36 37

tactile marking

Claims (12)

1. Key (25) and associated standardised profile cylinder, wherein the key (25) comprises indentations (29a-f) standing back behind the straight envelope (26) between the key tip (27) and the key bow (28) and wherein the profile cylinder comprises pin tumblers (21, 22) which lie exclusively in a single row in the diametric plane (32) of the lock core (30) and stand in a single row in this diametric plane (32), characterised in that all the indentations (29a-f) of the key (25) extend merely over a partial width of the key face, and in that at least from a predetermined depth of the indentations the remaining width of the key face not covered by the partial width of the indentations forms a protector (20) which protrudes over the indentations laterally and lies between the pin tumblers standing merely in a single row and the broadside surface of the key covering the indentations, wherein the key (25) can be used in two positions of insertion which are offset with respect to each other by 180° in each case.
2. Key (25) and associated standardised profile cylinder as claimed in Claim 1, characterised in that the protector (20) extends in a straight line between the key tip (27) and the key bow (28).
3. Key (25) and associated standardised profile cylinder as claimed in Claim 1 or 2, characterised in that the protector (20) has a constant width over the entire length on which the indentations (29a-f) are disposed.
4. Key (25) and associated standardised profile cylinder as claimed in Claim 3, characterised in that the protector (20) has a rectangular outline as seen over its length.
5. Key (25) and associated standardised profile cylinder as claimed in Claim 4, characterised in that the longitudinal edge of the protector (20) which points outwards with respect to the key broadside is not rounded.
6. Key (25) and associated standardised profile cylinder as claimed in any one of Claims 1 to 5, characterised in that the key (25) is designed as a turning key which locks one and the same profile cylinder independently of its position of insertion.
7. Key (25) and associated standardised profile cylinder as claimed in any one of Claims 1 to 5, characterised in that the key (25), in dependence upon its respective position of insertion, actuates two different profile cylinders with mutually independent pin tumblers.
8. Key (25) and associated standardised profile cylinder as claimed in any one of Claims 1 to 7, characterised in that the protector (20) provides, on its side facing the indentations (29a-f), a lateral contact surface (34) for the core pins (21) of the pin tumbler.
9. Key (25) and associated standardised profile cylinder as claimed in any one of Claims 1 to 8, characterised in that the protector (20) is formed only on the deep indentations of the key (25).
10. Standardised profile cylinder and associated key as claimed in any one of the preceding Claims, characterised in that the pin tumblers lie in a diametric plane (32) of the lock core (30), and in that the key channel (31) is offset by a partial width of the key in the direction towards the protector (20) acting upon the pin tumblers when the key is inserted.
11. Profile cylinder and associated key as claimed in Claim 10, characterised in that the lateral offset is approximately one quarter of the key width.
12. Profile cylinder and associated key as claimed in Claim 10 or 11, characterised in that the key channel (31) comprises, on its side facing the pin tumblers, an additional longitudinal rib (35) which at least in the case of keys of a subordinate hierarchy corresponds to an additional longitudinal groove (13) on the key profile.

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