EP3299543B1 - Locking cylinder - Google Patents

Description

The invention relates to a lock cylinder with a core rotatable in a housing and with a lock bit, with a locking channel arranged in the core for the introduction of a key and with a coupling slide that either creates or releases a positive fit of the lock bit with respect to the core.

From the AT 380 300 B a lock cylinder has become known in which a coupling part can be axially displaced by a key. A resilient locking pin is displaceably guided in the coupling part. The resilient locking pin locks the coupling part with one of the cylinder cores in the manner of a ball catch.

Such a lock cylinder designed as a double lock cylinder is, for example, from DE 103 17 448 A1 known. In this lock cylinder, an actuating element is axially displaced by a key inserted into the lock channel. The actuating element releases the movement of a driver which is biased by a spring force in the direction of the locking bit. In the released position of the driver, a form fit is generated between the core and the locking bit. The lock cylinder can also be unlocked when the second core is coupled to the lock bit. Furthermore, from the EP 1 719 861 A2 a lock cylinder for an electronic locking system has become known in which a ring element is coupled to an inner actuating shaft and an axially displaceable coupling element generates or releases a positive fit between the ring element and the lock bit.

The document DE1261010 discloses a lock cylinder according to the preamble of claim 1.

The disadvantage of the known wear cylinders, however, is that they have a very complex structure. In particular, the control of the driver via the actuating element requires a large number of components.

The invention is based on the problem of developing a lock cylinder of the type mentioned at the outset in such a way that it has a particularly simple structure and high stability.

This problem is solved according to the invention in that a key holder of the coupling slide has a key holder bevel for the radial movement of the coupling slide when the key is inserted into the locking channel Has.

With this design, the form fit between the locking bit and the core is generated or released by a radial displacement of the coupling slide. Due to the arrangement of the directions of movement, the key receiving bevel can be made very long and thus absorb large forces. In addition, a load on the key perpendicular to its flat side is avoided. The lock cylinder is particularly compact and simple as a result.

According to another advantageous development of the invention, the coupling slide is reliably guided by the key inserted into the locking channel when a tip of the key laterally encompassing webs of the coupling slide are spaced from the key receiving bevel. In this way, a very stable three-point support of the driver on the key can be generated.

The transmission of the torque from the coupling slide in the direction of the lock bit is particularly simple according to another advantageous development of the invention if a lock bit coupling of the clutch slide has form-fitting surfaces that interact with a lock bit sleeve. The non-rotatable operative connection of the lock bit sleeve with the lock bit can take place via a simple toothing, a screw connection or by a one-piece component of the lock bit sleeve and lock bit. The lock sleeve can be made in different lengths, depending on the length of the lock cylinder.

According to another advantageous development of the invention, the key can easily be pushed into the wear channel when the lock bit is twisted if the coupling slide is guided axially displaceably and the form-fit surfaces interact with those of the lock bit sleeve in one axial position of the coupling slide and with the lock bit sleeve in the other axial position Form-fit surfaces are separated from each other. With this design, the coupling slide is guided axially and radially displaceably for the same function. This means that the key can be pushed completely into the locking channel in order to control pin tumblers. The coupling slide is moved axially and thus in the axis of the rotatable core. Since the form-fit surfaces of the coupling slide and the locking bit sleeve do not engage together when the locking bit is twisted and thus in the intended rotational position the form fit between the core and the cam sleeve can be generated.

According to another advantageous development of the invention, the interacting positive-locking surfaces of the cam coupling and the coupling slide are particularly simple in construction when the cam sleeve and the coupling slide have opposing lugs, when the lugs are spaced apart from one another in a radially inner position of the coupling slide and radially in one outer position of the coupling slide produce a form fit in the direction of rotation between the lock sleeve and the coupling slide.

According to an advantageous development of the invention, the coupling slide is particularly simple in construction when the key receiving bevel is arranged on a common axial section like the webs and protrudes into the end of the locking channel. As a result of this design, the webs and the key receiving bevel can encompass the tip of the key inserted into the locking channel.

According to another advantageous development of the invention, the connection of the coupling slide with the lock bit is particularly compact if the lock bit coupling is spaced apart from the key receiving bevel in the axial direction.

According to another advantageous development of the invention, the coupling slide has a high level of stability if a base part of the coupling slide is arranged between the lock bit coupling and the key receiving bevel.

The guidance of the coupling slide within the lock cylinder is particularly simple in terms of construction when the base part and the core have guide surfaces that correspond to one another. The guide surfaces are to be arranged in such a way that the coupling slide can be moved axially and radially.

Fig. 1

einen Längsschnitt durch einen Schließzylinder mit einem teilweise eingeführten Schlüssel,

Fig. 2

einen Querschnitt durch den Schließzylinder englang der Linie II - II aus Figur 1,

Fig. 3

einen Längsschnitt durch den Schließzylinder aus Figur 1 bei vollständig eingeführten Schlüssel,

Fig. 4

einen Querschnitt durch den Schließzylinder englang der Linie IV - IV aus Figur 3,

Fig. 5

einen Längsschnitt durch den Schließzylinder aus Figur 1 bei verdrehtem Schlüssel,

Fig. 6

einen Querschnitt durch den Schließzylinder englang der Linie VI - VI aus Figur 5,

Fig. 7

eine perspektivische Darstellung eines Kupplungsschiebers des Schließzylinders mit einer Spitze des Schlüssels,

Fig. 8

eine gegenüber Figur 7 um 180° gedrehte Darstellung des Kupplungsschiebers.

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

Fig. 1

a longitudinal section through a lock cylinder with a partially inserted key,

Fig. 2

a cross section through the lock cylinder engang the line II - II from Figure 1 ,

Fig. 3

a longitudinal section through the lock cylinder Figure 1 when the key is fully inserted,

Fig. 4

a cross section through the lock cylinder engang the line IV - IV Figure 3 ,

Fig. 5

a longitudinal section through the lock cylinder Figure 1 if the key is twisted,

Fig. 6

a cross section through the lock cylinder engang the line VI - VI Figure 5 ,

Fig. 7

a perspective view of a coupling slide of the lock cylinder with a tip of the key,

Fig. 8

one opposite Figure 7 Representation of the coupling slide rotated by 180 °.

Figure 1 shows a lock cylinder with two cores 2, 3 rotatably mounted in a housing 1. The movement of the cores 2, 3 can be optionally connected to the housing 1 or released via pin tumblers (not shown). The cores 2, 3 each have a locking channel 4, 5 for the introduction of a key 6 for controlling the pin tumblers. A lock bit 7 is arranged between the cores 2, 3. The key 6 is designed as a flat key. The lock bit 7 is positively connected in the direction of rotation to two axially displaceable lock bit sleeves 8, 9. The cam sleeves 8, 9 are held at a distance from one another by a spring element 10 and are thus pretensioned in the direction of the cores 2, 3. In each case a coupling slide 11, 12 is guided in a rotationally fixed manner in the cores 2, 3 and enables the creation or release of a form fit of the respective core 2, 3 with the respective lock sleeve 8, 9. The coupling slides 11, 12 are via bolts 27, 28 by means of a schematically illustrated spring element 26 at a distance from one another and thus biased in the direction of the cores 2, 3.

In the position shown, the key 6 is only partially inserted into the one locking channel 4. This means that the coupling slide 11 and the lock sleeve 8 are on this side of the lock cylinder axially separated from each other. The form fit of the coupling slide 11 is therefore released from the lock sleeve 8. The form fit of the other coupling slide 12 from the other lock bit sleeve 9 is also released, so that the lock bit 7 can be freely rotated. This lock cylinder is therefore suitable for use in so-called panic doors or for electrically controllable locks in which it must be possible to move the lock bit 7 uninhibited by the control of the cores 2, 3.

Figure 2 shows a sectional view through the lock cylinder from Figure 1 along the line II - II in the area of a lock bit coupling 13 of one of the coupling slides 11 with the opposing lock sleeve 8. The lock sleeve 8 has a radially inwardly pointing nose 14, while the coupling slide 11 has a radially outwardly pointing nose 15.

One pushes starting from the position Figure 1 the key 6 completely into the locking channel 4, the tip of the key 6 comes against the coupling slide 11 and moves it in the radial direction and in the axial direction. With a corresponding rotary position of the lock bit 7, however, the lock bit clutch 13 is prevented from closing. In this rotational position, the coupling slide 11 presses the lock sleeve 8 into the lock bit 7. The coupling slide 11 and the lock sleeve 8 are thus superimposed so that there is no positive fit between the two components in the direction of rotation.

Figure 4 shows, for the sake of clarity, that when the key 6 is inserted into the locking channel 4, the lugs 14, 15 lie one above the other due to the radial movement of the coupling slide 11. This means that the coupling slide 11 and the lock sleeve 8 are still separated from one another in the direction of rotation. Furthermore show the Figures 2 and 4th that the radial direction of movement of the coupling slide 11 extends in the direction of the longest radial extension of the key 6, which is designed as a flat key, and thus of the locking channel 4.

By completely inserting the key 6 into the locking channel 4, however, the pin tumblers are activated and the core 2 can be rotated relative to the housing 1. The coupling slide 11 slides over the cam sleeve 8 until the cam coupling 13 engages and creates a form fit between the coupling slide 11 and the cam sleeve 8 in the direction of rotation. This position is in Figure 5 shown. The lock sleeve 8 is pressed back into the core 2. The coupling slide 11 penetrates axially into the lock sleeve 8. The core 2 and also that of the lock bit 7 can then be rotated by means of the key 6.

Figure 6 shows a sectional view through the lock bit coupling 13 from Figure 5 along the line VI - VI that the nose 15 of the coupling slide 11 and the nose 14 of the lock sleeve 8 interlock and thus generate form-fit surfaces 16, 17 for coupling the coupling slide 11 with the lock sleeve 8 in the direction of rotation.

Figure 7 shows an enlarged perspective view of one of the coupling slides 11 together with the tip of the key 6. The coupling slide 11 has a key receptacle 18 for receiving the tip of the key 6, a base part 19 which is guided in the core 2, and one half of the cam clutch 13, which with the lock sleeve 8 from the Figures 1 to 6 cooperates. The base part 19 has guide surfaces 20 with which it is connected to the core 2 in a rotationally fixed and axially and radially displaceable manner. The key holder 18 has a key holder bevel 21 which cooperates with a ramp 22 at the tip of the key 6 for the radial movement of the coupling slide 11. The tip of the key 6 laterally encompassing webs 23 are spaced from the key receiving bevel 21. The ends of the base part 19 limit the radial mobility of the coupling slide 11 with stop surfaces 24.

Figure 8 shows the coupling slide 11 from Figure 4 from the opposite side onto the lock bit coupling 13 with the nose 15.

Since the key receiving bevel 21 of the coupling slide 11 interacts with the ramp 22 of the tip of the key 6, it is not sufficient to only control the pin tumblers to unlock the lock cylinder. In addition, the coupling slide 11 must also be activated in order to generate the form fit of the core 2 with the locking bit 7.

Claims (9)

1. A lock cylinder with a core (2) rotatable in a housing (1) and with a lock bit (7) with a lock channel (4) arranged in the core (2) for introducing a key (6) and with a coupling slide (11) optionally generating or releasing a positive locking of the lock bit (7) in relation to the core (2), wherein the coupling slide (11) for releasing or generating the positive locking is guided radially displaceably in the core (2), and wherein the radial direction of movement of the coupling slide (11) extends in the direction of the longest radial extension of the lock channel (4), characterized in that a key receptacle (18) of the coupling slide (11) has a key receptacle bevel (21) for the radial movement of the coupling slide (11) when the key is introduced into the lock channel (4).
2. The lock cylinder according to claim 1, characterized in that webs (23) of the coupling slide (11) laterally engaging around a tip of the key (6) are spaced apart from the key receptacle bevel (21).
3. The lock cylinder according to claim 1 or 2, characterized in that a lock bit coupling (13) of the coupling slide (11) has positive-locking surfaces (16, 17) cooperating with a lock bit sleeve (8).
4. The lock cylinder according to claim 3, characterized in that the coupling slide (11) is axially displaceably guided and the positive-locking surfaces (16, 17) in the one axial position of the coupling slide (11) cooperate with those of the lock bit sleeve (8) and are separated from one another in the other axial position of the positive-locking surfaces (16, 17).
5. The lock cylinder according to any one of claims 1 to 4, characterized in that the lock bit sleeve (8) and the coupling slide (11) have mutually opposite noses (14, 15), that the noses (14, 15) have a distance from one another in a radially inner position of the coupling slide (11) and in a radially outer position of the coupling slide (11) generate a positive locking in the direction of rotation between the lock bit sleeve (8) and the coupling slide (11).
6. The lock cylinder according to any one of claims 2 to 5, characterized in that the key receptacle bevel (21) is arranged on a common axial section such as the webs (23) and protrudes into the end of the lock channel (4).
7. The lock cylinder according to any one of claims 3 to 6, characterized in that the lock bit coupling (13) is spaced apart from the key receptacle bevel (21) in the axial direction.
8. The lock cylinder according to any one of claims 3 to 7, characterized in that a base part (19) of the coupling slide (11) is arranged between the lock bit coupling (13) and the key receptacle bevel (21).
9. The lock cylinder according to claim 8, characterized in that the base part (19) and the core (2) have mutually corresponding guide surfaces (20).

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