EP1577469A2 - Key - Google Patents

Abstract

Key (4) for a lock cylinder having a series of pin tumblers (7, 7') comprises a shaft (11), a series of lock recesses (12) arranged a certain distance (a) apart in the shaft, and a key tip (15) arranged on its free end and having an insertion bevel (16). The insertion bevel is located outside the arrangement of the lock recesses. Preferred Features: The distance between the free end of the key tip and the next lock recess is shorter than the distance between the lock recesses.

Description

The invention relates to a key for a Series of pin tumblers having lock cylinder with a shaft, with a row of arranged in the shaft, interacting with the pin tumblers Schließausnehmungen, wherein the locking recesses in a provided grid spacing are spaced from each other, and with one arranged at its free end, one Insertion beveled key tip.

Such a key is for example from DE 35 17 660 A1 known. The locking recesses bear with one Step measure a closing secret, which is in line with the Pin tumblings of the key corresponds. The at the Key tip arranged insertion bevel presses Inserting the key into a closing channel of the Locking cylinder pin tumblers from the closing channel. As a result, the key has a high closing comfort when inserting the key into the lock cylinder on. When introduced into the lock cylinder Key reach the locking recesses on the height the pin tumblers. At one to close the Locking cylinder authorized keys are housing pins the pin tumblers completely in a housing while holding pin pins of the pin tumblers remain in a core of the lock cylinder. That lie All parting lines of the core pins and the housing pins in the parting plane between housing and core, so that the core can be moved relative to the housing. The closing channel for receiving the key is up to Sheath of the core open. With a rotation of the core prevented with the fully inserted key the back of the key that the housing pins in the Enter closing channel.

A disadvantage of the known key is that the insertion bevel one of the pin tumblers on the key tip move into the parting plane between the housing and the core can. In the worst case, in the known Key arranged deepest in the closing channel Stiftzuhaltung of the insertion and the rest Pin tumblers from the wrong locking recesses in the lock cylinder unlocking position to be moved. Thus, the lock cylinder is unlocked without the key is fully inserted. This is for example then the case, if adjacent to each other Pin tumblers the same step measure or repetitive one Have graduated measures and the last, am deepest in the closing channel arranged pin tumbler coincidentally one of the key tip corresponding step size Has. In this case, the pin tumblers give the movement the core is free from the housing, although the Key not fully inserted into the lock channel is. The core can then be slightly twist and block, because the case pin of the last Pin tumbler on the side of the key back in penetrates the closing channel. After blocking leaves the lock cylinder no longer operate and the Also do not remove the key from the closing channel.

The invention is based on the problem of a key of the type mentioned above so that he only after a complete insertion into the closing channel unlocking the lock cylinder allows.

This problem is inventively achieved in that the insertion bevel of the key tip outside the grid the closing recesses is arranged.

This design avoids the key tip one of the pin tumblers actuated when the inventive key to a grid in too little the lock cylinder is inserted. Will the key but only so far pushed into the lock cylinder, the insertion bevel actuates one of the closing tumblers, are the locking recesses outside the Pitch of pin tumblers. In this case, prevent the rest, not operated by a key tip Pin tumblers unlocking the lock cylinder. This is thanks to the invention, the release of the Locking cylinder only possible if the inventive Key fully inserted into the lock cylinder is.

When not completely inserted into the closing channel, according to the invention key is an actuation of the last pin tumbler through the key top reliably avoided when a solid profile section of the shaft between the key tip and the last locking recess up to one by the pitch a from the last Closing recess spaced location is performed. As a result, the lowest located in the closing channel arrives Pin tumbler on the solid profile section, if the key according to the invention by a grid size too little is inserted in the lock cylinder. As the solid profile section of the key according to the invention thereby characterized not to have a closing recess, holds the pin tumbler which is located deepest in the closing channel the lock cylinder in its locked position.

Alternatively, it can be according to another advantageous Development of the invention, an actuation of last closing recess by the key tip reliable Avoid when the distance of the free end the key tip of the next closing recess smaller than the pitch of the locking recesses. This avoids that the deepest in the Locking channel arranged pin tumbler ever operated is when the key according to the invention a Pitch was too little introduced into the closing channel.

A smooth introduction of the invention Key in the closing channel can be according to another achieve advantageous invention, when the Einführschräge one of the locking recesses deviating Contour has. At the same time this is the danger an actuation of a closing recess through the Key tip reduced.

To further simplify the introduction of the invention Key in the closing channel and the other Reduction of the risk of actuation of a pin tumbler through the key tip it helps when the Einführschräge one in the longitudinal direction of the shaft strong inclined first section and join the strong inclined first section adjoining slightly inclined second section has.

The key according to the invention avoids lock cylinders with several rows of Schließzuhaltungen reliable the simultaneous actuation of the last pin tumblers, if at two opposite rows of locking recesses facing each other Insertion slopes are offset from each other.

The key according to the invention is constructive especially easy if with multiple rows of locking recesses only one of the chamfers outside the Pitch a is arranged.

Fig. 1

einen Teilschnitt durch einen Schließzylinder mit einem erfindungsgemäßen Schlüssel,

Fig. 2

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

Fig. 3

eine Schnittdarstellung entsprechend der Figur 2 mit einem um das Rastermaß a zu wenig eingeschobenen Schlüssel,

Fig. 4

eine weitere Ausführungsform des erfindungsgemäßen Schlüssels,

Fig. 5

eine weitere Ausführungsform des erfindungsgemäßen Schlüssels,

Fig. 6

eine Schnittdarstellung durch den Schließzylinder aus Figur 2 mit einem Schlüssel nach dem Stand der Technik.

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

Fig. 1

a partial section through a lock cylinder with a key according to the invention,

Fig. 2

a greatly enlarged sectional view through the lock cylinder of Figure 1 with the key according to the invention along the line II - II,

Fig. 3

2 is a sectional view corresponding to FIG. 2 with a key inserted too little around the grid dimension a;

Fig. 4

a further embodiment of the key according to the invention,

Fig. 5

a further embodiment of the key according to the invention,

Fig. 6

a sectional view through the lock cylinder of Figure 2 with a key according to the prior art.

Figure 1 shows in partial section as a double-profile lock cylinder trained lock cylinder with a in a housing 1 rotatable core 2. The core 2 has a Locking channel 3 for inserting a key 4 and with a cam 5 rotatably coupled. The closing channel 3 is on one side with a recess 6 up to guided the housing 1 of the lock cylinder.

Figure 2 shows a greatly enlarged partial section through the lock cylinder with the key 4 of Figure 1 along the line II - II. The lock cylinder has two each other opposing rows of pin tumblers 7, 7 '. The pin tumblers 7, 7 'each have one of a spring element 8 biased against a core pin 9 Housing pin 10 and cooperate with in a shaft 11th of the key 4 arranged locking recesses 12 together. In the position shown are the parting planes the core pins 9 and the housing pins 10 each in the Dividing plane between the housing 1 and core 2 arranged. In order to is the lock cylinder in the unlocked Position.

The key is completely in Figure 2 in the closing channel 3 introduced, leaving a paragraph 13 of the key 4 abuts a shoulder 14 of the core 2. A key tip 15 of the key 4 has the rows of pin tumblers 7 facing chamfers 16. The pin tumblers 7, 7 'and thus also the closing recesses 12 are by an intended pitch a from each other spaced. The key tip 15 points from the next Locking recess 7, 7 'a smaller distance as the pitch a.

If you therefore leads the key 4 of Figure 2 to the grid a too little in the closing channel 3, as it is in Figure 3, the open end of the Kerns 2 closest pin tumblers 7 in moves the lock cylinder unlocking position. however the key tip 15 comes with the insertion bevels 16 not arranged to the lowest in the closing channel 3 Pin tumblers 7 '. Therefore, the on deepest pin tumblers arranged in the closing channel 3 7 'the movement of the core 2 relative to the housing 1.

FIG. 4 shows a further embodiment of the invention Key 4, where between a key tip 17 and the next locking recess 12 a Full profile section 18 is arranged. The full profile section 18 between the key tip 17 and the last Schließausnehmung 12 is up to one to the grid a spaced from the last locking recess 12 Led the job. When you turn the key 4 of Figure 4 the grid a too little in the closing channel 3 of the Introduces lock cylinder of Figure 2, the arrives at deepest pin tumbler 7 'arranged in the closing channel 3 on the solid profile section 18. This allows the am deepest pin tumbler 7 'arranged in the closing channel 3 Do not release the movement of the core 2. To prevent this the lowest in the closing channel 3 arranged Pin tumblers' the unlocking of the lock cylinder.

FIG. 5 shows a further embodiment of the key 4, in which a first insertion bevel 19 in the longitudinal direction of the shaft 11 strongly inclined first section 20 and one subsequent to the first section 20 having slightly inclined second portion 21. A second insertion bevel 22 is also opposite to the first Insertion bevel 19 arranged offset. However, both are Insertion bevels 19, 22 outside the grid a.

In an alternative, not shown embodiment can be assigned to two rows of pin tumblers 7 Locking recesses 12 only one of the insertion bevels 19, 22 be arranged outside the grid a.

FIG. 6 shows one in the lock cylinder according to FIG. 2 introduced key 23 according to the prior art. Of the Key 23 has the same arrangement of locking recesses 12 as the key 4 of Figures 1 to 5 and able to fully inserted in the closing channel 3 Condition to close the lock cylinder. The key 23 in the prior art is in Figure 6 to the grid a too little introduced into the closing channel 3 and Einführschrägen 24 a key tip 25 are exactly at the pitch a from the next closing recess 12th spaced. Here it can be seen that the deepest in the closing channel 3 arranged pin tumblers 7 ' from the key tip 25 into the movement of the core 2 releasing position are moved. The remaining pin tumblers 7 are from the "wrong" closing recesses 12 of the key 23 in which the movement of the core 2 moving position. This allows the Turn the core 2 relative to the housing 1. However, since the Locking channel 3, as shown in Figure 1, after a Side is open to the housing 1, during rotation the core 2, the housing pins 10 of the lowest in the Closing channel 3 arranged pin tumblers 7 'in the Penetrate the closing channel 3 and block the lock cylinder. Subsequently, the key 23 can not be subtract more and the core 2 does not move.

Claims (7)

A key for a lock cylinder comprising a series of pin tumblers having a shank with a series of locking recesses disposed in the shank and cooperating with the pin tumblers, the locking recesses being spaced from each other at a predetermined pitch, and having an insertion bevel disposed at its free end having key tip, characterized in that the insertion bevel (16, 19, 22) of the key tip (15, 17) outside the grid dimension (a) of the closing recesses (12) is arranged. Key according to claim 1, characterized in that a solid profile section (18) of the shank (11) between the key tip (17) and the last closing recess (12) to a spaced by the pitch (a) from the last closing recess (12) location is guided. Key according to claim 1 or 2, characterized in that the distance of the free end of the key tip (15) from the next closing recess (12) is smaller than the spacing (a) of the closing recesses (12). Key according to at least one of the preceding claims, characterized in that the insertion bevel (19) has a contour deviating from the closing recesses (12). Key according to at least one of the preceding claims, characterized in that the insertion bevel (19) has a first section (20) which is greatly inclined in the longitudinal direction of the shaft (11) and a slightly inclined second section (FIG. 20) adjoining the steeply inclined first section (20). 21). Key according to at least one of the preceding claims, characterized in that, in the case of two rows of closing recesses (12) lying opposite one another, insertion chamfers (19, 22) lying opposite one another are offset from each other. Key according to at least one of the preceding claims, characterized in that with several rows of closing recesses (12) only one of the insertion bevels (16, 19, 22, 24) outside the grid dimension (a) is arranged.

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