EP1333135B1 - Lock cylinder - Google Patents

Abstract

At least two core pins (12, 13) and their corresponding casing pins (19, 20) are offset at an angle of 180 deg. relative to each other, have parallel length axes (25) and can be rotated in opposite directions into the open position using a flat key. The length axis of at least one of the core pins and the keyway central axis (7) intersect at an acute angle at a point not on the core length axis. The keyway end regions of the core pins are covered by keyway wall sections (38-41) integrally formed from the core (3) and/or the bore (2) for receiving the core pins is at least partially covered at one end, in order to make manipulation of the core pins more difficult. The cylinder has at least two pairs of pins each comprising a casing pin which is spring-loaded in the direction of the core by a compression spring (21) and a coaxial core spring. The pins are moved into an open position by inserting a flat key between the outer mantle surface (14) of the core and the bore (2) inside the cylinder casing (1) for receiving the core. At least two core pins extend at an acute angle relative to the key central axis (6).

Description

The invention relates to a lock cylinder with Stiftzuhaltung, with a cylinder housing having a circular cylindrical bore extending in the longitudinal axis, in which a in an orthogonal to its longitudinal axis cross-section circular cylindrical core is rotatably arranged with a key channel by a flat key, with at least two pairs of Tumbler pins each consisting of a housing pin loaded by a compression spring in the direction of the core and a respective coaxial core pin, the pairs of core and housing pins extending from the flat key into an unlocking position between the outer surface of the core and the core accommodating bore of the cylinder housing provided interface in the unlocked position (open position) are controllable, the flat key variable key recesses for controlling the housing pin and core pin existing spring-loaded Zuhaltun gene and at least two core pins are arranged at an acute angle to the center line of the flat key, said at least two core pins with their associated housing pins offset by 180 ° and with their longitudinal axes parallel to each other and controllable in opposite directions by the flat key in the open position and the longitudinal axis of at least one of the core pins cut through the center of the keyway and extending through the core longitudinal axis center line outside the core longitudinal axis at an acute angle.

Lock cylinder of the assumed type are by the FR 1 481 530 A previously known.

Further lock cylinders are from the DE 37 36 129 C2 and the same content EP 0 313 864 B1 previously known. Both in these documents as well as in other locking systems with Mehrzuzuzugungsreihen these are arranged to the core longitudinal axis, ie the center of the core, horizontally or are parallel to it at right angles and also cut the core longitudinal axis.

Such lock cylinders are also known from the following documents: Leaflet of WILKA Schließtechnik GmbH "Technology at the highest level - The vertical reversible key system from WILKA";"Security Locks, Locking Systems, Electronic Alarm Systems - Factors of Safety", Prospectus of Dom Sicherheitstechnik GmbH & Co. KG; "KESO, ... the best solution for your safety", brochure KESO AG Precision Lock Factory; "The only locking system with Swiss patent protection until 1995", Kaba Star, prospectus of the General Agency for the Federal Republic of Germany, Häfele.

Especially lock cylinder after the DE 37 36 129 C2 and the EP 0 313 864 B1 already have a high safety standard.

From the CH 651 350 A a cylinder lock with a reversible key is already known, which is insertable into a rotatable cylinder core and having two identical groups of wells, wherein radially displaceable, spring-loaded core pins are arranged in the cylinder core and in the wells each effective at a given insertion position of the key for the Schließpermutationen Group of depressions are latched, and wherein at least one of the wells of each group is formed as a stepped bore. It is provided at least one spring-loaded, radially displaceable in the cylinder core control pin, which is latched into the stepped bore of the respective permutation not influencing group of wells. Every group of recesses has a plurality of stepped holes, which are formed in pairs the same, wherein the heads of the stepped bore pairs associated pairs of Zuhalte- or control pins are formed differently. The heads of the different pairs of pins penetrate different depths in the stepped holes. Each group has, in addition to normal drilling stepped holes, which are formed in pairs the same. Such stepped holes are difficult to copy, since a separate drilling tool must be made for each hole, whose head is adapted to the respective control surfaces. This would make it difficult to unauthorized key replication.

The EP 982 452 A also shows a cylinder lock with a flat key, in which also a scanning of the housing pins and the core pins is given by inserting a burglary tool in the keyway.

The invention has for its object to design a lock cylinder of the assumed genus with maximum Nachschließsicherheit and extraordinary scanning security.

The object is solved by the features of claim 1.

By materially integral with the core wall parts of the keyway and possibly the opening into this bore for receiving the relevant core pin Kernstiftenden be secured at least partially end in a sampling aggravating manner in all the aforementioned solutions against scanning. This wall parts can be formed in accordance with the Durchdringungskurven the holes for the core pins on the one hand in the key channel on the other hand and enclose the Kernstiftenden completely or partially sleeve-shaped, so that after removing the flat key scanning is impossible.

In the cylinder lock according to the invention, it is practically impossible to push back the core and housing pins by scanning by means of a burglary tool, since the end of the core pins projecting into the key channel are covered by housing parts. Neither the so-called "impression technique" nor the "picking method" are applicable here to unauthorized to open a trained with such a lock cylinder lock, for example, to valuables, game or vending machines. Was a palpation already at a cylinder lock after the DE 37 36 129 C2 very difficult, so this is virtually impossible in a cylinder lock according to claim 1 . Here, two core pins are provided, wherein the loaded by compression springs against the core pins housing pins offset by 180 ° and arranged with their longitudinal axes parallel to each other. By a flat key, which can be configured as required either as a reversible key or as a longitudinal rib profile flat key, the core pins can be counter-controlled in the open position against the springs of the housing pins. The longitudinal axis of at least one of the core pins, which is coaxial with the longitudinal axis of the associated housing pin, intersects a centerline passing through the center of the keyway and through the core longitudinal axis, outside the core longitudinal axis at an acute angle. If necessary, both longitudinal axes of the core pins can cut this center line outside the core longitudinal axis.

In the dependent claim 2 , the longitudinal axis of at least one core pin intersects the longitudinal axis of the core, while the longitudinal axis of at least one other core pin this center line eccentrically, that is outside the core longitudinal axis intersects.

Dependent claim 3 differs in that the two longitudinal axes of at least two core pins the cut said centerline at a distance from the center of the keyway. The center of this keyway is thus eccentric to the longitudinal axis of the rotatable core.

In the dependent claim 4 , the distances at which the longitudinal axes of the core pins cut through the longitudinal axis of the core and through the center of the keyway extending line, the same size.

In contrast, at least one further core pin is arranged with a spring-loaded housing pin in the angular range to arranged on different sides of the core core pins in the dependent claim . Of course, several such core pins with associated spring-loaded housing pins can be additionally distributed over the circumference of the cylinder housing. As a result, the security of the castle is again significantly increased.

In claim 6 , a plurality of rows of core pins and associated housing pins in the longitudinal axis of the core next to and / or arranged one behind the other, which further contributes to increasing the Nachschließsicherheit.

Claim 7 describes an embodiment in which pairs of specially designed core pins with associated housing pins are arranged alternately distributed on different sides of the core over its circumference.

A preferred embodiment describes claim 8 . It follows that the core is provided with a recess through which such core pins whose longitudinal axis no longer intersects the core longitudinal axis in the center, gradually controlled from the eccentric position during the opening movement by a suitable flat key in the parting plane between the core and bore of the cylinder housing be, while this parting plane in belonging to the prior art lock cylinders only on the cylindrical transition from the inner bore of the lock housing for receiving the rotating core and its lateral surface.

This recess or shaping for the "eccentrically" arranged core pins is directed, on the one hand, to a gentle closing process for the core pins, since the outside of this recess, forming a second parting plane, merges smoothly into the outer cylindrical surface of the otherwise circular cross-section core. Although the invention is not limited thereto, one will assume a small area or a flat curve, which gradually increases to the outer circumference of the core and merges smoothly in its outer surface with a curved curve. For this purpose, claim 9 describes a preferred solution.

In the embodiment according to claim 10 , the core pin rows are associated with associated housing pins by a continuous surface on this side of the core, which form the respective curved recess.

According to claim 11 but also the individual recesses of different core pins with housing pin rows can be separated from each other by webs. These webs form on their outer side portions of the outer surface of the rotating core.

Claim 12 describes another embodiment.

Advantageously, the core pins are conically or spherically rounded at their flat key facing end portion. This allows a smooth, smooth closing process with little effort. This is also the embodiment according to claim 13 contributes.

Claims 14-17 describe further advantageous embodiments of the invention.

According to claim 18 , the flat key is provided as a longitudinal rib profile flat key with undercuts and / or profilings. The profiles can preferably be provided on one of the narrow sides of the key, but also on both narrow sides and / or on the broad sides of the longitudinal rib profile flat key. This depends on the number of arrangement of core pins in the core and on the design of the key channel.

Another particularly advantageous embodiment describes claim 19 . In this, the flat key is designed as a reversible key. The reversible key is preferably provided at least on its opposite broad sides with corresponding recesses, holes or recesses through which the core pins are to be controlled.

Claim 20 describes a further advantageous embodiment of the invention.

Fig. 1

einen Schließzylinder in einem orthogonal zur Längsachse des Zylindergehäuses und des darin rotierend angeordneten Kerns geführten Querschnitt mit im Schlüsselkanal eingeführten Flachschlüssel, und zwar in Offenstellung des Schließzylinders (Kernstifte sind durch den Flachschlüssel in Offenstellung gesteuert);

Fig. 2

den aus Fig. 1 ersichtlichen Schließzylinder in Sperrstellung, ohne Schlüssel;

Fig. 3

den aus Fig. 2 ersichtlichen Schließzylinder mit dem in Abzugsstellung befindlichen oder einem nicht passenden Schlüssel;

Fig. 4

einen orthogonal zu seiner Längsachse geführten Querschnitt durch einen Kern mit in Sperrstellung befindlichen Kernstiften;

Fig. 5

einen Querschnitt entsprechend Fig. 4, mit eingeführtem Schlüssel, wobei die Kernstifte in Offenstellung gesteuert sind;

Fig. 6

das Profil eines Flachschlüssels in einem zu seiner Längsachse geführten Querschnitt;

Fig. 7

einen Querschnitt durch den aus Fig. 1 bis 3 ersichtlichen Schließzylinder, wobei der Ablauf einer Schließung dargestellt ist;

Fig. 8

der weitere Ablauf einer Schließung entsprechend Fig. 7;

Fig. 9

abermals der weitere Ablauf einer Schließung entsprechend Fig. 7 und 8;

Fig. 10

der Ablauf einer Schließung, wobei der Flachschlüssel weiter in andere Drehrichtungen gedreht worden ist;

Fig. 11

das weitere Fortschreiten des Drehens des Kerns mittels eines Flachschlüssels entsprechend Fig. 10;

Fig. 12

einen Kern in der Stirnansicht mit eingeführtem Schlüssel, wobei letzterer im Querschnitt dargestellt ist;

Fig. 13

einen Kern in perspektivischer Darstellung, in größerem Maßstab;

Fig. 14

einen Kern im Querschnitt zur Veranschaulichung wechselseitiger Anordnungen von Kernstiften, in Sperrstellung;

Fig. 15

abermals einen Kern im Querschnitt entsprechend Fig. 14 mit in den Schlüsselkanal eingeführtem Flachschlüssel, in Offenstellung;

Fig. 16

eine Darstellung entsprechend Fig. 4 und 5, jedoch ohne die die Endbereiche der Kernstifte abdeckenden erfindungsgemäßen Wandungsteile, wobei die Kernstifte im Gegensatz zu den Darstellungen in Fig. 4 und 5 um 180° versetzt dargestellt sind, ohne Schlüssel im Schlüsselkanal, in Sperrstellung;

Fig. 17

einen Querschnitt durch einen Kern entsprechend Fig. 16, mit in den Schlüsselkanal eingeführtem Flachschlüssel, letzterer ebenfalls im Querschnitt, in Offenstellung;

Fig. 18

einen Kern in perspektivischer Darstellung mit wechselseitigen Positionen der zweiten Schnittstelle;

Fig. 19

den aus Fig. 18 ersichtlichen Kern, von der anderen Seite dargestellt, ebenfalls in perspektivischer Darstellung;

Fig. 20

einen Längsachsschnitt durch einen Schließzylinder mit in den Schlüsselkanal eingeführtem Flachschlüssel, letzterer abgebrochen dargestellt;

Fig. 21

einen Schnitt nach der Linie A - A der Fig. 20;

Fig. 22

das aus Fig. 20 ersichtliche Schloß und

Fig. 23

einen Schnitt nach der Linie B - B der Fig. 22.

In the drawing the invention - partly schematically - exemplified. Show it:

Fig. 1

a lock cylinder guided in a direction perpendicular to the longitudinal axis of the cylinder housing and the core arranged therein rotating cross-section with keychain inserted flat key, in the open position of the lock cylinder (core pins are controlled by the flat key in the open position);

Fig. 2

the out Fig. 1 apparent lock cylinder in locked position, without key;

Fig. 3

the out Fig. 2 apparent lock cylinder with the located in the withdrawal position or a non-matching key;

Fig. 4

a guided orthogonal to its longitudinal axis cross-section through a core with located in the locking position core pins;

Fig. 5

a cross section accordingly Fig. 4 with inserted key, the core pins being controlled in the open position;

Fig. 6

the profile of a flat key in a guided to its longitudinal axis cross-section;

Fig. 7

a cross section through the Fig. 1 to 3 apparent lock cylinder, wherein the sequence of a closure is shown;

Fig. 8

the further course of a closure accordingly Fig. 7 ;

Fig. 9

again the further course of a closure accordingly Fig. 7 and 8th ;

Fig. 10

the expiration of a closure, wherein the flat key has been further rotated in other directions of rotation;

Fig. 11

the further progress of turning the core by means of a flat key accordingly Fig. 10 ;

Fig. 12

a core in the front view with inserted key, the latter being shown in cross section;

Fig. 13

a core in perspective, on a larger scale;

Fig. 14

a core in cross-section to illustrate mutual arrangements of core pins, in the locked position;

Fig. 15

again a core in cross section accordingly Fig. 14 with flat key inserted into the keyway, in open position;

Fig. 16

a representation accordingly Fig. 4 and 5 but without the wall parts according to the invention covering the end regions of the core pins, the core pins being in contrast to the illustrations in FIG Fig. 4 and 5 are shown offset by 180 °, without key in the keyway, in locked position;

Fig. 17

a cross section through a core accordingly Fig. 16 , with flat key inserted into the key channel, the latter also in cross-section, in the open position;

Fig. 18

a core in perspective view with mutual positions of the second interface;

Fig. 19

the out Fig. 18 apparent core, shown from the other side, also in perspective;

Fig. 20

a Längsachsschnitt represented by a lock cylinder with inserted into the keyway flat key, the latter broken off;

Fig. 21

a section along the line A - A of Fig. 20 ;

Fig. 22

the end Fig. 20 apparent lock and

Fig. 23

a section along the line B - B of Fig. 22 ,

In the drawing, the reference numeral 1 designates a cylinder housing having a circular cylindrical, running in the longitudinal direction of the bore 2, in which a in a direction orthogonal to its longitudinal axis cross-section circular core 3 is arranged with a key channel 4. In the key channel 4, a flat key 5 can be introduced, which is designed according to the cross-sectional shape of the key channel 4. The flat key 5 may be formed as a so-called longitudinal rib flat key or reversible key and have corresponding cuts and / or blind holes. These cuts or the like of the flat key 5 are particularly clear Fig. 6 seen. There, the center line of the flat key 5 is denoted by the reference numeral 6, while the center line of the key channel 4 has the reference numeral 7. When inserted flat key 5, the center lines 6 of the flat key 5 are arranged coaxially to the center line 7 of the key channel 4, so fall together. The center line 7 of the key channel 4 extends through the center of rotation of the core 3 and thus through the core longitudinal axis 8, thus intersecting orthogonal. To the center line 7 of the key channel 4 is also a core longitudinal axis 8 orthogonal intersecting transverse axis 9, which forms the transverse axis of the bore 2, but also the transverse axis of the core 3 and orthogonal to the core longitudinal axis 8 and orthogonal to the center line 7 of the key channel. 4 runs. This results in the quadrants I, II, III and IV in each cross-sectional plane of the core. 3

The transverse center line orthogonal to the center line 6 of the flat key 5 is denoted by the reference numeral 10 (FIG. Fig. 6 ) designated. This transverse center line 10 coincides with introduced into the key channel 4 flat key 5 with a transverse center line 11 which is orthogonal to the center line 7 of the key channel 4. The transverse center line 11 with the center line of the key channel 4 denotes the center of the key channel 4, through which the longitudinal center axis of the key channel 4 extends, which is directed parallel to the core longitudinal axis 8. As can be seen, the center of the keyway 4 formed thereby is arranged at a distance A from the center of the core 3 ( Fig. 4 and 5 ).

By the flat key 5, the core 3 is to be rotated either in the direction X or in the direction Y in the bore 2 of the cylinder housing 1 ( Fig. 7 to 11 ).

In the embodiment of the Fig. 1 to 5 and 7 to 11 and 14 to 17 . 21 and 23 are denoted by the reference numerals 12 and 13 core pins, which consist of materially integrally interconnected length sections of different diameters. Each of the core pins 12 and 13 has a enlarged in diameter, at its outer circumferential surface 14 of the core facing the end arranged head portion 15 and 16, which is formed crowned or mushroom-shaped rounded or curved designed. The smaller diameter sized, rod-shaped portion of each core pin 12 and 13 is guided in a reduced diameter bore portion longitudinally displaceable with little play. Its stroke is limited by the stop of the annular surface formed by the enlarged head portion 15 and 16 at the transition to the smaller diameter part of the respective core pin 12, 13 against the annular stop provided here in the relevant hole for the core pin 12, 13 in the core 3 itself.

In the from the Fig. 1 to 3 apparent position of the core 3 with respect to the cylinder housing 1, the core pins 12 and 13 coaxially opposite holes 17 and 18 are arranged, in each of which a housing pin 19 and 20 is disposed longitudinally displaceable against the restoring force of a compression spring 21 and 22 with play , Each of the compression springs 21, 22 is based on the respective housing pin 19 or 20 opposite side against a fixed abutment, for example, against a rivet 23 and 24, from.

The longitudinal axes 25 and 26 of the core pins 12, 13 extend at a distance and parallel to each other, such that the longitudinal axis 25 of the core pin 12, the core longitudinal axis 8 and thus also intersects the center of rotation of the core 3 in the relevant cross-sectional plane, while the longitudinal axis 26, the center line 7 of the keyway 4 below the transverse axis 9 intersects at an acute angle α. In the illustrated embodiments, the arrangement has been made such that the distances C and T measured orthogonally from the transverse axis 9 in the direction of the center line 7 of the key channel 4 are the same. This thus means that the longitudinal axis 26 of the core pin 13, the center line 7 of the keyway 4 eccentric with respect to the center of the keyway 4 intersects and thus is also arranged eccentrically with respect to the longitudinal axis 8 of the core 3.

So that all core pins 12, 13 can be brought into a parting plane by a suitable flat key 5, which lies between the outer circumferential surface 14 of the core 3 on the one hand and the bore 2 of the cylinder housing 1 on the other hand, so that the core 3 by the flat key 5 about its longitudinal axis Turn 8, it is necessary because of the eccentricity of the core pins 13, here introduce a second cutting plane or second parting surface. This second cutting plane or separating surface between the bore 2 of the cylinder housing 1 and the outer circumferential surface 14 of the rotatable core 3 is characterized manufactured, that in the region of the core 3, the outer circumferential surface 14 is provided with a suitable shape, recess or recess 27 which is bounded by a wall portion in the form of a curve 28. If a matching flat key is now inserted into the key channel 4, then the tumblers consisting of core pins and housing pins are controlled against the restoring force of the springs in the open position. If then turning the core 3, the heads of the housing pins slide gradually from the wall portion 27, controlled by the curve 28, in the outer circumferential surface 14 of the core 3, so that then the core 3 in the bore 2 of the cylinder housing 1 can also rotate , From the Fig. 7 to 11 It can clearly be seen how, during rotation of the core 3 by means of a suitable flat key 5, the core pins 12 and 13 on the one hand and the housing pins 19 and 20 on the other hand are controlled. In the direction of the longitudinal axis 8, this recess or shaping 27 is of course dimensioned so that it is at least slightly larger than the diameter of the relevant head part 16 of the associated core pin 13 on the one hand and the diameter of the housing pin 20 located here on the other. In addition, the curve 28 jumps smoothly into the outer circumferential surface 14, in order to allow a gentle closing operation. Out Fig. 7 is the beginning of a closing movement to recognize. The flat key 5 is inserted in the keyway 4 and the core 3 is rotated about its longitudinal axis 8 in the direction of arrow X. It can be seen how the housing pin 20 with its front side along the curve 28 slides until it according to Fig. 4 occurs on the lateral surface 14 of the core 3 and continues to slide along here. Out Fig. 9 It can be seen how the housing pin 20 slides along with its head part 16 on the lateral surface 14 of the core 3.

Fig. 10 shows the opposite direction of rotation of the core in the direction Y and the sliding along the housing pin 20 on the curve 28 until the housing pin 20 in turn on the outer circumferential surface 14 of the core 3 occurs and slides along, which is out Fig. 11 can be seen. Through the recess 27 and the curve 28 thus, so to speak, a second interface or parting plane between the bore 2 of the cylinder housing 1 and the lateral surface 14 of the core 3 is formed, so that the lock cylinder despite the eccentricity of the core pin 13 with respect to the core longitudinal axis 8 locked and can be unlocked.

Between the core pins 12 and 13, at least one further core pin 29 may be provided, which may be formed and arranged as well as the core pins 12 and 13. Also, this core pin 29 is associated with a housing pin 30 with compression spring 31, which turned away at its the housing pin 30 Side biased against a rivet 32 is supported. Also the other compression springs the housing pins are arranged biased. The core pin 29 and the housing pin 30 may also be omitted if necessary.

In the direction of the longitudinal axis 8 are in the from the Fig. 1 to 15 apparent embodiment, a plurality of rows of core pins 12 and 13 at a distance and running parallel to each other arranged one behind the other, which is particularly clear Fig. 13 evident. There it can be seen that a total of five such rows of core pins 12 and 13 are arranged one behind the other, wherein the recesses 27 of all rows of core pins is designed as a continuous recess. Curve 28 also extends longitudinally across all rows of core pins 12 and 13. All of these rows of core pins are formed and arranged as described above.

Of course, the number of rows of core pins arranged one behind the other in the longitudinal axis direction can also be greater or smaller than this Fig. 13 is recognizable. Also, the angles can be designed differently than can be seen from the drawing. Incidentally, in Fig. 13 the holes for the housing pins 30 by the reference numeral 33 for one of the holes. The housing pins themselves, the compression springs and the rivets are not shown in this figure.

The reference numeral 34 ( Fig. 13 . 18 . 20 ) denotes a so-called stop curve, in which the trigger safety a cam pin 35 ( Fig. 20 ), which is arranged in a bore of the cylinder housing 1 and locked, for example, by a rivet, screw or the like, and which also serves to limit the closing, for example, 90 ° rotational direction of the core 3.

In the non-inventive lock cylinder after the Fig. 16 and 17 For parts of the same function, the same reference numerals have been used as in the embodiments described above. In the in the Fig. 16 and 17 shown cutting plane is the core pin pair 12 and 13 in turn with its longitudinal axes 25 and 26 arranged parallel to each other, such that the one core pin 12 in the quadrant III and the core pin 13 is arranged substantially in the quadrant IV. The cylinder housing 1, not shown, is formed as in the above-described embodiment, which also applies to the housing pins, also not shown, which are arranged corresponding to the core pins 12 and 13. Fig. 16 shows the representation without matching flat key, while at Fig. 17 a flat key 5 is arranged in the key channel 4 and the core pins 12 and 13 has been controlled accordingly to the outside. The recess 27 is located here in the quadrant I.

The core pins 12 and 13 according to the Fig. 16 and 17 can with the from the Fig. 1 to 15 shown core pins can be arranged alternately, as can be seen from the FIGS. 18 and 19 results. Of course, it is possible, one or the other type of arrangement of core pins, that is according to the embodiment of the Fig. 1 to 15 or according to the embodiment of the Fig. 16 and 17 , only once or in rows one behind the other, also in each case about the longitudinal axis 8 of cross-sectional plane to the cross-sectional plane against each other rotated by an equal or different angular amount, to order.

Like from the FIGS. 18 and 19 shows the recesses 27 are separated in this embodiment by webs 36 and 37 from each other. The webs 36 and 37 may also be omitted, so that there is a continuous recess 27 on each side, similar to Fig. 13 ,

By the reference numerals 38 and 39 and 40 and 41 are materially integral wall portions or wall parts referred to the core 3, which after pulling out the relevant flat key (for example Fig. 1 ) cover the respective conical or crowned end portions of the core pins 12 and 13 against scanning.

If the flat key 5, for example according to Fig. 2 introduced into the keyway 4, the associated end portions of the core pins 12 and 13 are controlled by provided on the flat key 5 recesses 42 and 43 in the open position against the restoring force of the associated compression springs 21, 22 controlled.

In cases where more than two core pins 12, 13 or more than a series of Kernstiftpaaren next to and / or behind each other - seen in Längsachsrichtung the core 3 - are provided, corresponding wall parts are arranged as described above with the core 3 in one piece, wherein even the flat key 5 is provided with the recesses 42 and 43 corresponding recesses to control the associated core pins 12, 13.

LIST OF REFERENCE NUMBERS

1

cylinder housing

2

drilling

3

core

4

keyway

5

Flat key, reversible key, longitudinal rib profile flat key

6

Centerline of the flat key 5

7

Center line of key channel 4

8th

core longitudinal axis

9

transverse axis

10

Transverse centerline of the flat key 5 and the key channel 4

11

"" "" ""

12

core pin

13

"

14

Outer shell surface of the core 3, cylindrical surface

15

Headboard of a core pin

16

"" "

17

Bore for a housing pin

18

""""

19

housing pin

20

"

21

compression spring

22

"

23

rivet

24

"

25

longitudinal axis

26

"

27

Recess, shaping, recess

28

Curve, wall section

29

core pin

30

housing pin

31

compression spring

32

rivet

33

drilling

34

velocity curve

35

cam pin

36

web

37

"

38

Wall part or wall region of the core 3

39

"" "" "

40

"" "" "

41

"" "" "

42

Recess in the flat key 5

43

"" "

I

quadrant

II

"

III

"

IV

"

A

Distance between the core longitudinal axis 8 and the transverse axis 9 from the center of the key channel 4th

X

arrow

Y

direction of rotation

C

distances

T

"

α

angle

Claims (20)

1. Cylinder lock with a pin tumbler, having a cylinder block (1) incorporating a cylindrical hole (2) running in a longitudinal direction in which cylindrical hole a core (3) which is cylindrical in a cross-section at right angles to its longitudinal axis and which incorporates a key channel (4) which can be turned by means of a flat key (5) is arranged, having at least two pairs of tumbler pins, each of which pairs consists of a block pin (19, 20) on which block pins (19, 20) a compression spring (21, 22) acts in the direction of the core (3) and of a coaxially arranged core pin (12, 13), where the pairs of core and block pins (12, 19 or 13, 20) can be guided by means of the flat key (5) in an unlocking (open) position to an interface provided between the outer envelope surface (14) of the core (3) and the hole (2) in the cylinder block (1) receiving the core (3), where the flat key (5) has variable key indentations for controlling the spring-loaded tumblers, each consisting of a block pin (19, 20) and a core pin (12, 13), and where at least two core pins (12, 13) are arranged at an acute angle to the centre line (6) of the flat key (5), where these at least two core pins (12, 13) with their associated block pins (19, 20) are set 180° apart and with their longitudinal axes (25, 26) running parallel with each other and in the open position can be guided by means of the flat key (5) in opposing directions and the longitudinal axis (26) of at least one of the core pins (13) intersects at an acute angle (α) outside the core longitudinal axis (8) the centre line running through the middle of the key channel and through the core longitudinal axis (8), characterised in that the conically or spherically constructed end portions of the core pins (12, 13) are in a manner which makes them difficult to sense at least partly covered by the wall portions (38, 39 and 40, 41) of the key channel (4) which form a single piece with the core (3) and, if necessary, by the hole (2) opening into this to receive the core respective core pin (12 or 13).
2. Cylinder lock as claimed in claim 1, characterised in that the longitudinal axis (25) of at least one of the said at least two core pins (12) intersects the longitudinal axis (8) of the core (3) and at an acute angle (α) the centre line (7) running at right angles through the longitudinal axis (8) of this core (3) and through the centre of the key channel (4), while the longitudinal axis of at least one other of the said at least two core pins (13) intersects this centre line (7) outside the core longitudinal axis (8) at an acute angle (α).
3. Cylinder lock as claimed in claim 1, characterised in that each of the two longitudinal axes (25, 26) of the said at least two core pins (12) intersects at an acute angle (α) and at a distance from the centre of the key channel (4) the centre line (7) running through the longitudinal axis (8) of the core (3) and through the centre of the key channel (4).
4. Cylinder lock as claimed in claim 1, characterised in that the longitudinal axes (25, 26) of the said at least two core pins (12, 13) intersect at the same distance from the centre of the key channel (4) the centre line (7) running through the longitudinal axis (8) of the core (3) and through the centre of the key channel (4).
5. Cylinder lock as claimed in claim 1, characterised in that at an angular distance from the at least two core pins (12, 13) and block pins (19, 20) at least one further core pin (29) is arranged with a spring-loaded block pin (30) the longitudinal axes of which coincide with a radius of the core (3).
6. Cylinder lock as claimed in claim 1 or any one of the claims following it, characterised in that more than one row of centre pins (12, 13) and block pins (19, 20) are arranged next to and/or behind one other in the longitudinal direction of the core (3).
7. Cylinder lock as claimed in claim 1 or any one of the claims following it, characterised in that block pins (19, 20) with assigned core pins (12, 13) are arranged at the same or different angles at least in pairs alternately in cross-sectional planes running at right angles through the longitudinal axis (8) of the core (3).
8. Cylinder lock as claimed in claim 1 or any one of the claims following it, characterised in that in the area of the longitudinal axis (26) of the core pins (13) which are arranged eccentrically to the longitudinal axis (8) of the core (3) the core (3) is provided with a recess (27) forming a second parting plane between the cylinder block (1) and the core (3), the wall portion (28) of which recess (27) in relation to the circumference (14) of the core (3) in both directions of rotation (X - Y) gradually merges with the outer envelope surface (14) of the core (3) in such a way that when the core (3) is rotated the respective block pin (20) can by means of a flat key (5) gradually be smoothly moved by the outer limit of the recess (27) into the outer cylindrical envelope surface (14) of the core (3).
9. Cylinder lock as claimed in claim 8, characterised in that all the transitional portions of the wall portion (28) of the recess (27) are rounded off or curved.
10. Cylinder lock as claimed in claim 8 or 9, characterised in that all the recesses (27) of different core pins (13) are connected to each other on the same side of the core (3) by a moulding running all the way through in a longitudinal direction.
11. Cylinder lock as claimed in claim 8 or 9, characterised in that all the recesses (27) of different core pins (13) are separated from each other on one side of the core (3) in their longitudinal direction by separating portions (36, 37) constructed as a single piece with the core (3).
12. Cylinder lock as claimed in claim 1 or any one of the claims following it, characterised in that the core pins (12, 13) are at their end or tip portions (15, 16) pointing towards the flat key (5) constructed tapered or spherical and rounded off.
13. Cylinder lock as claimed in claim 8, characterised in that the core pins (12, 13) are at their end portions pointing towards the block pins (19, 20) constructed rounded or domed.
14. Cylinder lock as claimed in claim 1 or any one of the claims following it, characterised in that the wall portions or wall parts (38, 39 and 40, 41) covering the ends of the core pins are arranged on opposing sides.
15. Cylinder lock as claimed in claim 1 or any one of the claims following it, characterised in that each of the wall portions or wall parts (38, 39 and 40, 41) providing the cover extends over the centre line (7) of the key channel (4).
16. Cylinder lock as claimed in claim 15, characterised in that the wall portions or wall parts (38, 39 and 40, 41) providing the cover are constructed in different lengths in the longitudinal direction of the associated core pin (12 and 13).
17. Cylinder lock as claimed in claim 1 or any one of the claims following it, characterised in that the wall portions or wall parts (38, 39 and 40, 41) of the core (3) which provide the cover for the ends of the core pins (12, 13) enclose the ends in the form of sockets and in an axial direction overlap towards the centre line (7) of the key channel (4).
18. Combination of a cylinder lock as claimed in claim 1 or any one of the claims following it and an associated flat key, characterised in that the flat key (5) is a longitudinally ribbed flat key provided with notches and/or shaped portions and/or blind holes.
19. Combination of a cylinder lock as claimed in any of claims 1 to 17 and an associated flat key, characterised in that the flat key (5) is constructed as a turning key provided on both broad sides with shaped portions or gaps, notches or blind holes interacting with the core pins (12, 13).
20. Combination of a cylinder lock as claimed in any of claims 1 to 17 and an associated flat key, characterised in that the flat key (5) is provided on both sides with shaped portions or blind holes and that the end portions of core pins (12, 13) pointing towards the flat key (5) are - wholly or partly - covered by covers, projections, recesses, separating portions, rivets or the like constructed as a single piece with the cylinder core.

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