EP1505229B1 - Lock cylinder - Google Patents

Abstract

The housing (1) has a cylinder (2), operating the lock, which has a notch (11) which depresses a spring (10) by a ball (9) unless the electric motor rotates the actuator (14) to block the movement.

Description

The invention relates to a lock cylinder with a movable core in a housing, with an electrically activatable locking mechanism, with a guided in a recess of the housing and movable into a recess of the core locking latch for selectively blocking or releasing the core, and with a in the range of motion of Locking bar movable blocking element for blocking or releasing the movement of the locking bar, and with a spring element for biasing the locking bar in the recess.

Such a lock cylinder is known for example from DE 41 26 160 A1. In this lock cylinder, the lock mechanism has an electromagnet for moving the lock member. The blocking element is biased into the blocking position of the movement of the locking bolt and is withdrawn at a release of the lock cylinder against the force of the spring of the electromagnet. Subsequently, the core can be rotated relative to the housing. In this case, the locking bolt is pushed back out of the recess of the core into the housing. The bias of the locking bar in the recess of the core allows the generation of a zero position in which the core is locked relative to the housing.

A disadvantage of the known lock cylinder is that a high energy requirement is necessary for movement of the blocking element against the force of the spring element. Of the Energy demand is, however, usually covered by a battery arranged in the lock cylinder, so that the lock cylinder has a high maintenance requirement for replacing the battery. In addition, especially in lock cylinders, where the core has to be rotated twice for unlocking, the solenoid must be controlled during the entire duration of the closing operation. Furthermore, in a present over a longer period locking authorization, for example, when a key gets stuck in the lock cylinder, the solenoid is permanently activated, which further increases the energy consumption.

Furthermore, from DE 198 27 827 A1 discloses a lock cylinder has become known in which a so-called Lavet engine moves a control cam. The control cam cooperates with a recess of a locking bar. On the locking bar rolling elements are biased by a spring element in a recess of the housing. The Lavet engine is thus in the core. A disadvantage of this lock cylinder, however, is that the locking mechanism requires a large number of moving components and therefore is expensive to assemble.

The invention is based on the problem of designing a lock cylinder of the type mentioned above so that it has a particularly low energy consumption.

This problem is inventively solved in that the locking mechanism has an electric motor drive, that the blocking element is rotatably mounted on a drive shaft of the electric motor drive and released from a blocking position in which the locking bolt is supported in a release position in which the movement of the locking bolt is, is movable and that the recess of the core for the locking bolt or the locking bar has a pointing in the direction of movement of the core ramp.

By this design, the blocking element is rotated in the absence of locking authorization for unlocking the lock cylinder according to the invention in the blocking position or it remains in this position, if it was previously in this position. In the presence of a locking authorization, the blocking element is rotated in the release position and then remains in this position. Thus, the blocking element is adjusted powerless in both positions and therefore requires a particularly low energy consumption. After unlocking the lock cylinder, the locking mechanism can be controlled, for example, after a predetermined period of time to move the blocking element in the blocking position. A spring element for biasing the blocking element in one of the positions is not required thanks to the invention. When the blocking element is in the release position, the ramp enables the movement of the locking bar by rotation of the core.

The locking mechanism requires according to an advantageous embodiment of the invention, a particularly small space when a drive shaft of the electromotive drive is arranged parallel to a rotation axis of the core.

The spring element according to another advantageous embodiment of the invention requires a particularly small space when the spring element is designed as a leaf spring. Preferably, the spring element designed as a leaf spring is arranged between locking bolt and blocking element, so that the blocking element is the spring element supported in blocking position and thus indirectly blocks the movement of the locking bolt.

To further reduce the space required for the locking mechanism, it contributes according to another advantageous embodiment of the invention, when the locking bolt has a ball or consists of a preferably two-part pin with bevel, and by rotation of the core in befindlichem in the release position blocking element to release the core can be displaced from a parting plane between core and housing. The ball or the pin can be in the release position of the lock cylinder according to the invention simply squeeze out of the parting plane between the core and the housing due to the colliding oblique surfaces and remains during rotation of the core completely or in two-part pen partially in the housing. When in blocking position befindlicher blocking element, the ball or the pin can not be moved out of the parting plane, so that the core remains blocked.

According to another advantageous development of the invention, the locking mechanism is able to support high forces acting on the core when the locking bolt has a locking member guided in a channel-shaped recess penetrating the core, when the locking member has a length corresponding to the channel-shaped recess when the ball is between the two Locking member and the blocking element is arranged and when the housing has a second recess for receiving the free end of the locking bar on the opposite end of the blocking element of the channel-shaped recess. As a result, in the blocking position of the lock cylinder according to the invention, the locking bolt penetrates into mutually opposite recesses of the housing. In release position of Locking cylinder, the locking member is rotated with the core and held the ball in the housing.

A smooth movement of the core in the release position of the lock cylinder according to the invention can be easily ensured if the locking member has a guided in the channel-shaped recess and movable into the second recess of the housing ball.

A movement of the blocking element located in the blocking position by high forces introduced into the core can be easily avoided according to another advantageous development of the invention if the blocking element has a stop against the housing in the blocking position. Thus, the introduced into the core and transmitted via the locking bar on the blocking element forces are supported on the housing. Furthermore, the stop can be used to limit the movement of the blocking element by the electric motor drive.

The electromotive drive could, for example, be permanently energized if the blocking element is to be moved from one position to the other position. The movement of the blocking element could be monitored via limit switches. However, this requires a high design effort. The lock cylinder according to the invention, however, designed particularly simple by an electronic control device with a pulse generator for generating a control pulse for the electric motor drive. Another advantage of this design is that a permanent energization of the electromotive drive is avoided when blocking blocked in the movement. A blocking of the movement of the blocking element, for example arise when the core is not in the zero position and the movement of the blocking element in the blocking position is to be time-dependent.

The blocking element can be according to another advantageous embodiment of the invention by the electric motor drive easily move into its release position when the blocking element located in the release position has a voltage applied to the housing stop. As a result, consuming to be mounted limit switches are avoided.

Fig.1

einen Teilschnitt durch einen erfindungsgemäßen Schließzylinder,

Fig.2

eine Schnittdarstellung durch den erfindungsgemäßen Schließzylinder aus Figur 1 entlang der Linie II - II,

Fig.3

einen Teilschnitt durch eine weitere Ausführungsform des erfindungsgemäßen Schließzylinders,

Fig.4

eine Schnittdarstellung durch den erfindungsgemäßen Schließzylinder aus Figur 3 entlang der Linie III - III.

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

Fig.1

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

Fig.2

1 is a sectional view through the lock cylinder according to the invention from FIG. 1 along the line II-II, FIG.

Figure 3

a partial section through a further embodiment of the lock cylinder according to the invention,

Figure 4

a sectional view through the lock cylinder of Figure 3 according to the invention along the line III - III.

Figure 1 shows a lock cylinder with a rotatable core 2 in a housing 1 and with a locking mechanism 3 for selectively blocking or releasing the movement The core 2 has a closing channel 4 for receiving a key 5 with a transponder 6. The locking mechanism 3 has a guided in a recess 7 of the housing 1 locking bolt 8 with a ball 9. The ball 9 is biased by means of a leaf spring formed as a spring element 10 in a recess 11 of the core 2. The recess 11 in the core 2 is designed roof-shaped, so that upon rotation of the core 2, the ball 9 is pressed against the force of the spring element 10 in the recess 7 of the housing 1. The locking mechanism 3 has an electric motor drive 12. On a drive shaft 13 of the electric motor drive 12, a blocking element 14 is arranged rotationally fixed, which is described in more detail in Figure 2.

The electric motor drive 12 is connected to an electronic control device 15. The electronic control device 15 is supplied with electrical power from a battery 16 and receives signals from a receiving device 17. The receiving device 17 reads data from a transponder 6 of the key 5 and sends it to the electronic control device 15. The electronic control device 15 controls based on the data of the transponder 6 the electric motor drive 12 by means of a short pulse or omits the drive. The electronic control device 15 has for this purpose a pulse generator, not shown.

Figure 2 shows in a sectional view through the lock cylinder of Figure 1 along the line II - II, that the blocking element 14 is out of round and two stops 18, 19, with which it is supported in two end positions on the housing 1. In the illustrated end position, the blocking element 14 has a distance from the locking bolt 8 and is thus in one Release position. Turning the blocking element 14 counterclockwise until the other stop 19 comes against the housing 1, the blocking element 14 is directly before the spring element formed as a leaf spring 10 and thus prevents a moving out of the locking bolt 8 from the recess 11 of the core 2. Thus is the movement of the core 2 with respect to the housing 1 is blocked and the lock cylinder is in a locking position.

FIG. 3 shows a further embodiment of the lock cylinder, which differs from that of FIG. 1 primarily in that the locking bolt 8 has a locking member 20 above the ball 9 held by the spring element 10 in the form of a leaf spring. The locking member 20 is slidably disposed in a core 2 penetrating channel-shaped recess 21 and has a diameter of the core 2 corresponding length. The locking member 20 is composed of a arranged in the recess 21 bolt 22 and a penetrating into a second recess 23 of the housing 1 second ball 24 together.

FIG. 4 shows, in a sectional representation through the lock cylinder from FIG. 3 along the line IV -IV, that the second recess 23 of the housing 1 is roof-shaped. Upon rotation of the core 2, the second ball 24 is pressed against the pin 22 and this against the ball 9 held by the spring element 10. The blocking element 14 is shown in the movement into the blocking position, in which a moving out of the held by the spring element 10 ball 9 is prevented from the core 2. Thus, the core 2 is in the locking position of the lock cylinder through the two located in the parting plane between the core 2 and housing 1 balls 9, 24 positively connected to the housing 1 in two places. Otherwise, the lock cylinder according to Figures 3 and 4 as that of Figures 1 and 2 is constructed.

Claims (10)

1. Lock cylinder comprising a core which may be moved in a housing, comprising an electrically activatable catch mechanism, comprising a catch bar, which is guided in a recess in the housing and may be moved into a recess in the core, for selectively blocking or releasing the core, and comprising a blocking element, which may be moved into the region of movement of the catch bar, for blocking or releasing the movement of the catch bar, and comprising a spring element for biasing the catch bar into the recess, characterised in that the catch mechanism (3) comprises an electromotive drive (12), in that the blocking element (14) is rotationally engaged on a drive shaft (13) of the electromotive drive (12) and is movable from a blocking position, in which the catch bar (8) is supported, into a release position, in which the movement of the catch bar (8) is released, and in that the recess (11, 21) in the core (2) for the catch bar or the catch bar itself comprises a ramp pointing in the direction of movement of the core.
2. Lock cylinder according to Claim 1, characterised in that a drive shaft (13) of the electromotive drive (12) is arranged parallel to an axis of rotation of the core (2).
3. Lock cylinder according to either Claim 1 or Claim 2, characterised in that the spring element (10) is configured as a leaf spring.
4. Lock cylinder according to at least one of the preceding claims, characterised in that the catch bar (8) comprises a ball (9, 24) or consists of a preferably two-part bevelled pin and may be displaced by rotation of the core (2) when the blocking element (14) is in the release position for releasing the core (2) from a parting plane between the core (2) and housing (1).
5. Lock cylinder according to at least one of the preceding claims, characterised in that the catch bar (8) comprises a catch member (20) guided in a channel-like recess (21) penetrating the core (2), in that the catch member (20) has a length corresponding to the channel-like recess (21), in that the ball (9) is arranged between the catch member (20) and the blocking element (14), and in that the housing (1) has, on the end of the channel-like recess (21) opposing the blocking element (14), a second recess (23) for receiving the free end of the catch bar (8).
6. Lock cylinder according to at least one of the preceding claims, characterised in that the catch member (20) comprises a ball (24) which is guided in the channel-like recess (21) and may be moved into the second recess (23) in the housing (1).
7. Lock cylinder according to at least one of the preceding claims, characterised in that, in the blocking position, the blocking element (14) comprises a stop (19) adjacent to the housing (1).
8. Lock cylinder according to at least one of the preceding claims, characterised by an electronic control device (15) comprising a pulse generator for generating a control pulse for the electromotive drive (12).
9. Lock cylinder according to at least one of the preceding claims, characterised in that the blocking element (14) in the release position has a stop (18) adjacent to the housing (1).
10. Lock cylinder according to at least one of the preceding claims, characterised in that the electromotive drive (12) is configured as a piezomotor.

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