EP3412849A1 - Key for a lock cylinder and lock cylinder for such a key - Google Patents

Abstract

A key (8) for a lock cylinder (1) has convexly shaped flanks (15, 16) of a closing recess (12). The closing recess (12) serves to receive a tip of a pin (13) of a pin tumbler (5) arranged inclined to the plane of a shank (7) of the key (8). The key (8) can be very easily inserted into the lock cylinder (1) and allows a large number of locking recesses (12) on a limited length of the shaft (7).

Description

The invention relates to a key for a lock cylinder with a shaft and with at least one arranged in the shaft locking recess for Stiftzuhaltungen of the lock cylinder, wherein the locking recess has an inclined to the longitudinal axis of the shaft arranged edge. Furthermore, the invention relates to a lock cylinder for such a key with a rotatable core in a housing and a closing channel for receiving the shank of the key, wherein in the closing channel a pin of Stiftzuhaltung protrudes.

A key of the type mentioned is, for example, from the EP 2 221 436 A2 known. In this key, the locking recesses have different sections with different angles of inclination. This makes it possible to make incision reasons of adjacent locking recesses of different widths. In addition, particularly large incremental steps between adjacent closing recesses can be generated. These locking recesses interact with guided perpendicular to the shaft pin tumblers of the lock cylinder. However, pin tumblers are also often placed inclined to the shaft of the key. In such lock cylinders, the pin tumbler can jam when the locking recess has a particularly steep first section.

From the EP 2 848 755 A2 a key has become known in which a pin tumbler is disposed inclined to the shaft of the key. The locking recess in the key, however, is designed symmetrically with straight flanks. This can accommodate only a small number of locking recesses on a limited key length.

Furthermore, from the CH 657 178 A5 a key has become known in which the locking recesses have different shapes. The cooperating with the locking recesses pin tumblers are arranged perpendicular to the shaft of the key. This also allows only a small number of locking recesses to accommodate the limited key length.

The invention is based on the problem to form a key of the type mentioned so on that it allows a large number of locking recesses on a limited key length and is particularly easy to insert into the lock cylinder. Furthermore, a lock cylinder is to be created with a particularly high number of secrets for such a key.

The former problem is inventively achieved in that the flanks are designed convex.

Due to this configuration, a pin tumbler sliding over the edge initially enters a small displacement when entering the closing recess. One on such a locking recess sliding pin tumbler is therefore set against only a very small resistance. The key is thus particularly easy to insert into the lock cylinder. Furthermore, the shallowest areas of two adjacent locking recesses can merge into one another, since they do not contribute to the locking secret. Thus, the closing recesses and thus the pin tumblers can be arranged very close together.

A particularly smooth insertion of the key into the lock cylinder can be achieved according to another advantageous embodiment of the invention, when the edge is formed by a radius.

The convex flanks can be inexpensively put together from individual sections, if a deepest portion of the locking recess has a smaller angle of inclination to the perpendicular to the shaft than a flattest section.

To further reduce the resistance during insertion of the key in the closing channel, it contributes according to another advantageous embodiment of the invention, when a central portion has a rounded contour and passes continuously to the lowest section and the flattest section. The stepless transition of the middle section to the deepest and shallowest sections is preferably produced by coinciding tangents of the rounded contour of the middle section at the adjacent sections with their angles of inclination.

To further simplify the locking recess, it contributes according to another advantageous embodiment of the invention, when the central portion is formed by a radius.

The closing recess can be according to another advantageous embodiment of the invention determine mathematically simple and thus easy to manufacture, when the deepest portion and the flattest portion of the locking recess are formed by straight lines.

Pins of pin tumblers are reliably supported by the locking recess according to another advantageous embodiment of the invention, when the locking recess is designed asymmetrically transversely to the longitudinal axis of the shaft. This asymmetrical shape allows a smooth sliding a tilted pin tumbler in the locking recess and a precise support of the pin when closing.

The second-mentioned problem, namely the creation of a lock cylinder with a particularly high number of locking secrets for such a key is inventively achieved in that the pin tumblers are arranged inclined to the vertical to the shaft.

By this design, the lock cylinder allows particularly large increments of Stiftzuhaltung with small changes in the depth of the locking recess in the key. However, since the flanks leak out flat on the surface of the shaft of the key, snagging the pin tumblers is reliably prevented.

To further increase the number of locking secrets of the lock cylinder, it contributes according to another advantageous embodiment of the invention, when the pin of the pin tumbler is designed out of round with its projecting into the lock channel end. The non-circular shape could be generated, for example, by a flattening of the tip of the pen.

To further reduce the effort when inserting the key in the closing channel, it contributes according to another advantageous embodiment of the invention, when the projecting into the lock channel pin has a slotted guide in the core, so that the pin is rotatable during a longitudinal movement. Especially if the pen is with his in the locking channel projecting end is designed out of round, causes the insertion of the key lowering or raising the pin by the positive control in the slotted guide.

Fig. 1

einen Querschnitt durch einen Schließzylinder mit einem Schlüssel,

Fig. 2

eine Schnittdarstellung durch den Schließzylinder mit dem Schlüssel aus Figur 1 entlang der Linie II - II,

Fig. 3

eine Draufsicht auf den Schlüssel,

Fig. 4

stark vergrößert einen Teilbereich IV des Schließzylinders und des Schlüssels aus Figur 1,

Fig. 5

stark vergrößert einen Teilbereich einer weiteren Ausführungsform des Schlüssels,

Fig. 6

stark vergrößert einen Teilbereich einer weiteren Ausführungsform des Schlüssels,

Fig. 7

vergrößert eine weitere Ausführungsform des Schlüssels,

Fig. 8

stark vergrößert einen Teilbereich des Schlüssels aus Figur 7 mit angrenzenden Bereichen einer Stiftzuhaltung,

Fig. 9

einen Teilschnitt durch eine weitere Ausführungsform des Schließzylinders mit dem Schlüssel aus Figur 3.

The invention allows numerous embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below. This shows in

Fig. 1

a cross section through a lock cylinder with a key,

Fig. 2

a sectional view through the lock cylinder with the key FIG. 1 along the line II - II,

Fig. 3

a top view of the key,

Fig. 4

greatly enlarges a portion IV of the lock cylinder and the key FIG. 1 .

Fig. 5

greatly enlarges a portion of another embodiment of the key,

Fig. 6

greatly enlarges a portion of another embodiment of the key,

Fig. 7

enlarges another embodiment of the key,

Fig. 8

greatly enlarges a portion of the key FIG. 7 with adjacent areas of a pin tumbler,

Fig. 9

a partial section through a further embodiment of the lock cylinder with the key FIG. 3 ,

FIG. 1 shows a lock cylinder 1 with a rotatable core 2 in a housing 3 and two perpendicular to the plane arranged rows of Stiftzuhaltungen 4, 5 for selectively blocking or releasing the movement of the core 3. The core 3 has a Locking channel 6 for introducing a shaft 7 of the key 8 and for controlling the Stiftzuhaltungen 4, 5.

FIG. 2 shows in a sectional view through the lock cylinder 1 FIG. 1 along the line II - II that the core 3 is connected to a cam 9.

FIG. 3 shows the key 8 in a plan view of a flat side. The key 8 has a shaft 10 adjacent to the shaft. The shaft 7 has two rows of closing recesses 11, 12 for driving the two rows of pin tumblers 4, 5 of the lock cylinder 1. The key 8 is designed as a helical key.

FIG. 1 shows that one of the rows of Stiftzuhaltungen 5 is arranged inclined to the vertical to the flat side of the shaft 7 of the key 8. The pin tumblers 5 have a guided in the core 3 and projecting into the closing channel 6 pin 13. The pin 13 is opposite to a recess 14 in the housing 2. The pins 13 of the individual tilted pin tumblers 5 slide during insertion of the key 8 on the flat side of the shaft 7. If the inclined pointing on the shaft 7 of the key 8 pins 13 pushed out too far from the lock channel 6, they get to the other end in the recess 14 of the housing 2, whereby the movement of the core 3 is blocked.

FIG. 4 shows greatly enlarged a portion IV of the shaft 7 of the key 8 and the lock cylinder 1 from FIG. 1 , In this case, one of the closing recesses 12 with one of the inclined pin tumbler 5 can be seen. The closing recess 12 has symmetrically arranged flanks 15, 16, which are convex. The flanks 15, 16 are formed by a radius R1, so that a portion 17 of the flanks 15, 16 arranged low in the shaft is inclined less towards the perpendicular S on the shaft 7 than a flat, close to the surface of the flat side of the shaft 7 arranged portion 18th

FIG. 5 shows a further embodiment of the key 8, in the symmetrically arranged flanks 19, 20 of a closing recess 24 which is divided into three sections 21, 22, 23. A deepest portion 21 of the flanks 19, 20 of the locking recess 21 has a smaller inclination angle A to the perpendicular S on the shaft 7 than the flattest portion 23 with the inclination angle B. A central portion 22 has a rounded contour with a radius R2, which other two Sections 21, 23 steplessly connects.

FIG. 6 shows a further embodiment of the key 8, in which symmetrically arranged flanks 25, 26 of a closing recess 27 are divided into two sections 28, 29. The deepest portion 28 has a smaller inclination angle A to the vertical than the flattest portion 29 with the inclination angle B.

FIG. 7 shows a plan view of a shaft 30 of another embodiment of the key 31 for the lock cylinder 1 from FIG. 1 , It can be seen that closing recesses 32 are designed asymmetrically for the inclined pin tumblers 5 transversely to the longitudinal axis of the shaft 30. In addition, a closing recess 32 'arranged closest to a reide 33 is also designed asymmetrically in the longitudinal direction of the shank 30.

FIG. 8 shows the key FIG. 7 It can be seen that two flanks 34, 35 of the locking recess 32 are designed asymmetrically. One of the flanks 35 is made as in the embodiments FIGS. 4 to 6 described constructed. The other flank 34 has a particularly small angle of inclination C to the vertical S. The pin 13 is supported particularly precisely by the closing recess 32.

FIG. 9 shows a further embodiment of a lock cylinder 36, which extends from the FIG. 1 differs in that a pin 37 of the inclined arranged series of pin tumblers 38 at its the shaft 7 of the key 8 facing the end of a flattening 39 has. Furthermore, the pin 37 has a slotted guide 40 with a groove 41 and a sliding block 42 in the core 43. Thus, the pin 37 is lowered and raised at a rotation.

Claims (10)

Key (8, 31) for a lock cylinder (1, 36) with a shaft (7, 30) and with at least one locking recess (12, 24, 27, 32) for pin tumblers (5, 5) arranged in the shaft (7, 30). 38) of the lock cylinder (1, 36), wherein the closing recess (12, 24, 27, 32) an inclined to the vertical (S) on the shaft (7, 30) arranged flank (15, 16, 19, 20, 25, 26, 34, 35), characterized in that the flank (15, 16, 19, 20, 25, 26, 35) is convex. Key according to claim 1, characterized in that the flank (15, 16) is formed by a radius (R1). A key according to claim 1 or claim 2, characterized in that a deepest portion (17, 21, 28) of the locking recess (12, 24, 27) has a smaller angle of inclination (A) to the perpendicular (S) on the shaft (7) a flattest section (18, 23, 29). A key according to any one of the preceding claims, characterized in that a central portion (22) has a rounded contour and smoothly merges with the deepest portion (21) and the flattest portion (23). Key according to claim 4, characterized in that the central portion (22) is formed by a radius (R2). Key according to one of the preceding claims, characterized in that the deepest portion (21, 28) and the flattest portion (23, 29) of the closing recess (24, 27) are formed by straight lines. Key according to one of the preceding claims, characterized in that the closing recess (32) is designed asymmetrically transversely to the longitudinal axis of the shank (30). Locking cylinder (1, 36) for a key (8, 31) according to one of the preceding claims, comprising a core (3, 43) rotatable in a housing (2) and a closing channel (6) for receiving the shaft (7) of the key (8), wherein in the closing channel (6) has a pin (13, 37) of the pin tumbler (5, 38) protrudes, characterized in that the pin tumblers (5, 38) inclined to the vertical (S) on the shaft (7) are arranged. Lock cylinder according to claim 8, characterized in that the pin (37) of the pin tumbler (38) with its in the closing channel (6) projecting end is designed out of round. Lock cylinder according to claim 8 or claim 9, characterized in that in the closing channel (6) projecting pin (37) has a slotted guide (40) in the core (43), so that the pin (37) is rotatable during a longitudinal movement.

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