EP1626142A2 - Blocking mechanism - Google Patents

Abstract

The mechanism has a key having a transponder, with a controller recording a code of the transponder and determining a closing authorization. An actuator (10) for the control has a check mechanism, which controls the controller. The actuator may be piezoelectric, magnetostrictive or electromagnetic. The check mechanism has a core pin (15, 29), a housing pin (14) and link for the pre-loading of the housing pin (14) against the core pin. The housing and the core (2, 28) are each other aligning as channels (16, 17) with the core pin in cross section. In closing position, the core pin is arranged partly in the channel (16) of the housing and partly in the channel (17) of the core (2, 28).

Description

The invention relates to a locking mechanism, in particular for use in a lock cylinder of a mortise lock for selectively blocking in a closed position or releasing in an open position of a housing arranged in a movable core, with a transponder having a key, with a control device for detecting a code of the transponder and Determining a locking authorization, with an activatable by the controller actuator for controlling a locking device, wherein the locking device is formed in the closed position to produce a positive connection between the housing and the core and in the open position to cancel this positive connection.

Such a locking mechanism is known for example from DE 44 04 914 A1. Here, the locking device has a single biased in the basic position of a spring element against an outer circumferential surface of the core pin. The core has a wedge-shaped pocket. In the case of a locking authorization of the key, the pin is held by the actuator in its position and the core can be rotated relative to the housing. In the absence of locking authorization of the key, the activation of the actuator is omitted and the pin is pressed after an initial movement of the core by an angular range of for example 30 ° by the force of the spring element in the pocket and blocks the further movement of the core. An advantage of this locking mechanism is that the actuator does not move the locking device, but only has to hold. This results in a low power consumption of the actuator. However, the actuator must be driven during the entire opening operation of the locking mechanism for a designated period of time, which in turn leads to an increase in energy consumption.

A disadvantage of the known locking mechanism, however, is that the core can be rotated without locking authorization by the angular range of for example 30 ° until the pin penetrates into the pocket of the core. However, this leads to a low security against unauthorized unlocking of the locking mechanism.

Furthermore, from DE 100 20 038 A1 a locking mechanism has become known in which a pin of the locking device is biased in the basic position in a recess of the core. Laterally next to the recess, the core has wedge-shaped pockets for receiving the pin in the absence of access authorization of the key. When inserting the key, the pin is pushed out of the recess and either held by the actuator or released its movement depending on the locking authorization. Thus, this locking mechanism has a low energy consumption. However, even with this locking mechanism without key-locking key, the core can be rotated by an angular range until the pin passes into one of the pockets.

The invention is based on the problem, a locking mechanism of the type mentioned in such a way that in the absence of locking authorization of the key, the core can not be moved relative to the housing.

This problem is inventively solved in that the locking device comprises a core pin, a housing pin and biasing means for biasing the housing pin against the core pin, that the housing and the core aligned channels with a core pin corresponding cross-section and that in the closed position of the core pin partially in the channel of the housing and partially disposed in the channel of the core.

By this design, the core pin is arranged in the closed position in channels of the housing and the core. Since the channels have a cross section corresponding to the core pin, the core pin in the closed position prevents any movement of the core relative to the housing. This prevents a possible movement of the core relative to the housing in the absence of locking authorization of the key.

For example, the actuator could move the locking mechanism from the closed position to the open position. However, this would lead to a high power consumption of the locking mechanism. To reduce the energy consumption of the locking mechanism according to the invention, it helps if the actuator in the de-energized state, the core pin or the housing pin in a movement blocking the core position and in the energized state, the movement of the housing pin and the core pin to solve the positive connection between the housing and core releases. Since the actuator only holds the core pin or the housing pin and does not have to move, but only holds in his the movement of the core blocking or releasing position, the locking mechanism according to the invention has a particularly low energy consumption.

An energy consumption for holding the locking mechanism in the open position can be avoided according to an advantageous embodiment of the invention, when the core pin penetrates into the open position in a core, provided for inserting the key closing channel and if a locking recess in the key to hold the core pin against the force the biasing means is formed so that the parting line between the core pin and the housing pin lies in the parting plane between the core and the housing. Another advantage of this design is that the locking recess of the key is another security feature of the locking device according to the invention, so that by exclusive activation of the actuator, the locking device can not be unlocked.

Energy consumption in the return movement of the locking mechanism in the closed position can be easily avoided according to another advantageous embodiment of the invention, when the key between the locking recess and the key tip has a projection. As a result, the core pin and thus the housing pin is pressed against the force of the biasing means of the projection of the key from the closing channel and thus moves the parting plane between the core pin and the housing pin from the parting plane between the core and housing when removing the key from the closing channel.

The core pin is held independently of the locking recess of the key in the open position, according to another advantageous embodiment of the invention, when the locking device has a stop for limiting the range of movement of the core pin.

To further reduce the energy consumption of the locking mechanism according to the invention, it contributes, if the actuator has a movable holding element and if the holding element is designed to hold the core pin and / or the housing pin in the closed position of the locking device. As a result, the actuator requires only electrical energy in order to move the retaining element out of the position holding the core pin and / or housing pin when the key is presently locked. In the closed position, the core pin or the housing pin is held by the retaining element of the actuator. This leads to a significant reduction in the energy consumption of the actuator, since in contrast to the prior art, the actuator when driving the key into the lock channel and when pulling out the key must be controlled once each. A time-dependent control of the actuator during the entire closing operation as in the locking devices according to the prior art is not required by this.

The locking device is reliably held in the closed position in which the movement of the core blocking position when the core pin or the housing pin has a holding recess and when the holding element of the actuator penetrates into the holding recess in the closed position.

An energy consumption of the actuator for supporting the locking device in the closed position can be avoided according to another advantageous embodiment of the invention, when the direction of movement of the holding element is arranged transversely to the direction of force of the biasing means. By this design, the core pin or block the housing pin and the retaining element mutually, so that the actuator does not have to apply force to hold the retaining element in its position in which the locking device blocks the movement of the core.

An energy demand for moving out of the holding element from the holding recess can be kept particularly low according to another advantageous embodiment of the invention, when the holding recess is larger than the holding element of the actuator. As a result, the friction of the retaining element in the retaining recess is kept particularly low. In addition, the bias of the core pin or the housing pin against the holding member can be solved when the core pin is slightly pressed into the channel of the core. In this case, the holding element can be pulled out of the holding recess without friction.

The bias of the core pin or the housing pin against the retaining element is released each time the key is inserted and removed in the locking channel when, in the closed position, the tip of the core pin projects into the path of movement of the projection of the key. Thus, the holding element can be moved without friction into the holding recess of the core pin or the housing pin in or out of it each time the key is inserted and removed.

A manual movement of the core pin through the closing channel without activation of the actuator can be according to another advantageous embodiment of the invention easily avoided when the actuator is arranged in the core and the holding recess in the core pin. As a result, the inventive Locking mechanism reliably protected against manipulation by the closing channel.

Often, however, a power supply of the actuator or the control device for detecting the code of the transponder is arranged in the housing for reasons of space. In this case, sliding contacts for supplying the actuator with electrical energy according to another advantageous development of the invention can be easily avoided if the actuator is arranged in the housing and the retaining recess in the housing pin.

A depression of the core pin through the closing channel in a movement of the core releasing position can be according to another advantageous embodiment of the invention easily avoided if the closing channel facing the boundary of the holding recess has a paragraph and if the distance of the shoulder of the holding element is less than the distance of the tip of the core pin from the parting plane between the case and the core. This leads to a further protection against manipulation of the locking device according to the invention.

The locking mechanism according to the invention is structurally particularly simple if the biasing means have a spiral spring.

The actuator according to another advantageous embodiment of the invention has particularly small dimensions when the actuator is piezoelectric, magnetostrictive or electromagnetically acting. As a result, the actuator can be used in commercially available lock cylinders.

• Fig.1 eine Schnittdarstellung durch einen erfindungsgemäßen, in einem Schließzylinder angeordneten Sperrmechanismus beim Einführen eines Schlüssels,
• Fig.2 den Sperrmechanismus aus Figur 1 bei teilweise eingeführtem Schlüssel und vorliegender Schließberechtigung,
• Fig.3 den Sperrmechanismus aus Figur 1 in Offenstellung,
• Fig.4 den Sperrmechanismus aus Figur 1 bei teilweise eingeführtem Schlüssel und fehlender Schließberechtigung,
• Fig.5 den Sperrmechanismus aus Figur 1 in Schließstellung,
• Fig.6 eine weitere Ausführungsform des erfindungsgemäßen Sperrmechanismus.

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

• 1 shows a sectional view through an inventive, arranged in a lock cylinder locking mechanism during insertion of a key,
• 2 shows the locking mechanism of Figure 1 with partially inserted key and present locking authorization,
• 3 shows the locking mechanism of Figure 1 in the open position,
• 4 shows the locking mechanism of Figure 1 with partially inserted key and lack of locking authorization,
• 5 shows the locking mechanism of Figure 1 in the closed position,
• 6 shows a further embodiment of the locking mechanism according to the invention.

Figure 1 shows a portion of a lock cylinder with a rotatable in a housing 1 core 2 and with a locking mechanism 3 in a sectional view. The core 2 is coupled to a lock bit 4 and has a closing channel 5 for insertion of a key 6. The key 6 has a transponder 7 with a code stored therein. In the housing 1 is an antenna 8 for detecting the code of the transponder 7 and a Control device 9 for evaluating signals of the antenna 8 is arranged. The control device 9 determines from the signals of the antenna 8 a locking authorization for the transponder 7 of the key 6. In the simplest case, the control device 9 has a memory for at least one code, which is assigned an authorization for driving the locking mechanism 3.

Furthermore, an actuator 10 is arranged in the core 2, which cooperates with a locking device 11. The actuator 10 is controlled by the control device 9 as a function of the determined locking authorization. The actuator 10, the controller 9 and the antenna 8 are powered by a battery 12 formed as a power source with electrical energy. The locking device 11 has a biased by a coil spring 13 housing pin 14 and a core pin 15. The housing pin 14 and the core pin 15 are arranged longitudinally displaceable in mutually aligned channels 16, 17 of the housing 1 and the core 2. The longitudinal displaceability of the core pin 15 is limited by a stop 18 in the core 2. The channels 16, 17 each have a core pin 15 and the housing pin 14 corresponding cross-section. The core pin 15 penetrates with its tip 19 in the closing channel 5 in a movement path of a projection 20 of the key 6 a. Immediately behind the projection 20, the key 6 has a closing recess 21. The actuator 10 is piezoelectrically, magnetostrictively or electromagnetically acting and moves a holding element 22, which penetrates in the illustrated closed position of the locking device 11 in a holding recess 23 of the housing pin 14. As a result, the housing pin 14 is held in its position in which the core pin 15 is partially disposed in the housing 1 and partially in the core 2 is. Thus, the core pin 15 is in the illustrated closed position in the parting plane between the housing 1 and core 2. Since the channels 16, 17 have a core pin 15 corresponding cross section, the core pin 15 generates a positive connection between the core 2 and the housing first

The holding recess 23 is slightly larger than the holding element 22 of the actuator 10 and is bounded by a shoulder 24. When inserting the key 6 in the closing channel 5, as shown in Figure 2, the core pin 15 is pressed by the projection 20 of the key 6 in the direction of the housing pin 14. In this case, the bias of the retaining recess 23 is relieved against the retaining element 22 and the retaining element 22 can be pulled without friction of the actuator 10 from the retaining recess 23 in the present locking authorization of the key 6.

After the holding element 22 has been pulled out of the holding recess 23, the movements of the core pin 15 and the housing pin 14 are controlled by the contour of the key 6 and the coil spring 13. When locked key 6 reaches the tip 19 of the core pin 15 in the locking recess 21 of the key 6, as shown in Figure 3. In this case, the parting plane between the core pin 15 and the housing pin 14 enters the parting plane between the core 2 and the housing 1. The core 2 and thus the locking bit 4 can then be turned over the key 6. In the direction of rotation, flattenings 25 of the key 6 produce positive locking with a driving recess 26 of the core 2.

Figure 4 shows the locking mechanism 3 of Figure 1 with partially inserted into the lock channel 5 key 6 without locking authorization. As described to Figure 2, the projection 20 of the key 6 pushes the tip 19 of the core pin 15 down and relieves the bias between the retaining recess 23 in the housing pin 14 and the holding member 22 of the actuator 10. However, since no key authorization of the key 6 is present, which omits Actuation of the actuator 10 by the control device 9 and the holding element 22 remains in its position.

Upon further insertion of the key 6 in the closing channel 5, the housing pin 14 of the holding member 22 in its position in which the core pin 15 generates a positive connection of the core 2 with the housing 1, held. This position is shown in FIG. Thus, the locking mechanism 3 remains in the closed position.

FIG. 6 shows a further embodiment of the locking mechanism 3, which differs from that of FIG. 1 in that an actuator 27 is arranged in a core 28. Accordingly, a core pin 29 has a holding recess 30 into which a holding element 31 of the actuator 27 penetrates. The actuator 27 is supplied for example via sliding contacts 32 with electrical energy. Otherwise, the locking mechanism 3 as that of Figures 1 to 5 constructed and has the above-described operation.

Claims (15)

Locking mechanism in particular for use in a lock cylinder of a mortise lock for selectively blocking in a closed position or releasing in an open position of a movable core arranged in a housing, with a transponder having a key, with a control device for detecting a code of the transponder and for determining a locking authorization, with an activatable by the controller actuator for controlling a locking device, wherein the locking device is formed in the closed position to produce a positive connection between the housing and the core and in the open position for canceling this positive connection, characterized in that the locking device (3) has a core pin (15 , 29), a housing pin (14) and biasing means for biasing the housing pin (14) against the core pin (15, 29), that the housing (1) and the core (2, 28) mutually aligned channels (16, 17) with a the core pin (15, 29) have corresponding cross-section and that in the closed position of the core pin (15, 29) partially in the channel (16) of the housing (1) and partially in the channel (17) of the core (2, 28) is arranged. Locking mechanism according to claim 1, characterized in that the actuator (10, 27) in the de-energized state, the core pin (15, 29) or the housing pin (14) in a movement of the core (2, 28) blocking position and in the energized state the movement of the housing pin (14) and the core pin (15, 29) for solving the positive connection between the housing (1) and core (2, 28) releases. Locking mechanism according to claim 1 or 2, characterized in that the core pin (15, 29) in the open position in a core (2, 28) arranged to insert the key (6) provided for closing channel (5) penetrates and that a closing recess (21 ) in the key (6) for holding the core pin (15, 29) is formed against the force of the biasing means, so that the parting plane between the core pin (15, 29) and housing pin (14) in the parting plane between the core (2, 28) and Housing (1) is located. Locking mechanism according to at least one of the preceding claims, characterized in that the key (6) between the locking recess (21) and the key tip has a projection (20). Locking mechanism according to at least one of the preceding claims, characterized in that the locking device (11) has a stop (18) for limiting the range of movement of the core pin (15, 29). Locking mechanism according to at least one of the preceding claims, characterized in that the actuator (10, 27) has a movable holding element (22) and that the holding element (22) for holding the core pin (15, 29) and / or the housing pin (14) is formed in the closed position of the locking device (11). Locking mechanism according to at least one of the preceding claims, characterized in that the core pin (15, 29) or the housing pin (14) has a holding recess (23, 30) and that the holding element (22) of the actuator (10, 27) in the closed position in the retaining recess (30) penetrates. Locking mechanism according to at least one of the preceding claims, characterized in that the direction of movement of the holding element (22) is arranged transversely to the direction of force of the biasing means. Locking mechanism according to at least one of the preceding claims, characterized in that the retaining recess (23, 30) is larger than the retaining element (22) of the actuator (10, 27). Locking mechanism according to at least one of the preceding claims, characterized in that in the closed position, the tip (19) of the core pin (15, 29) projects into the path of movement of the projection (20) of the key (6). Locking mechanism according to at least one of the preceding claims, characterized in that the actuator (27) in the core (28) and the retaining recess (30) in the core pin (29) is arranged. Locking mechanism according to at least one of the preceding claims, characterized in that the actuator (10) in the housing (1) and the retaining recess (23) in the housing pin (14) is arranged. Locking mechanism according to at least one of the preceding claims, characterized in that the closure channel (5) facing the boundary of the retaining recess (23, 30) has a shoulder (24) and that the distance of the shoulder (24) from the holding element (22) is smaller as the distance of the tip (19) of the core pin (15, 29) from the parting plane between the housing (1) and core (2, 28). Locking mechanism according to at least one of the preceding claims, characterized in that the biasing means comprise a coil spring (13). Locking mechanism according to at least one of the preceding claims, characterized in that the actuator (10, 27) is piezoelectric, magnetostrictive or electromagnetically acting.

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