JPH0365468B2 - - Google Patents

Abstract

1. Arrangement for operating locking devices by means of an electrical signal, which is formed by positive comparison of key information entered with preset lock information, and which activates an electromagnetic clutching device that enables actuation of the lock, by way of which a rotatable part, accessible from without, is connected to a rotatable part performing the actuation of the lock, in locking installations, especially of housing developments, with the rotatable part accessible from without being connected to the driving element of a clutch, on the one hand, and with that part of the electromagnetic clutching device, on the other hand ; the rotatable part performing the actuation of the lock being connected to the driven element of the clutch, and the other part of the electromagnetic clutching device being connected with a part that determines the position of the coupling element of the clutch, and that, when the part accessible from without is turned and the electromagnetic clutching device is activated, moves the coupling element into engagement with the driving element and the driven element, characterized by the rotatable part accessible from without - the driving shaft (1) - being positioned with its axis offset and parallel to the axis of the rotatable part performing the actuation of the lock - the driven shaft (6), the driving shaft (1) bearing a gearwheel (2), which is connected by way of a connecting gearwheel (3) with a gearwheel (5) that can revolve freely about the driven shaft (6), to which a disk (7) of low-retentivity material, forming the one part of the electromagnetic clutching device, is fastened so that it cannot twist, a pivoting piece (8), which bears a pivoting magnet (9), that forms the other part of the electromagnetic clutching device, being positioned around the driven shaft (6), the pivoted lever (8) being connected to the holding magnet (11) of a holding-magnet circuit, and the holding piece (13), as the other part of the holding-magnet circuit, being fixed to the housing, both the two parts, disk (7) and pivoting magnet (9), of the pivoting-magnet circuit and the two parts, holding piece (13) and holding magnet (11), of the holding-magnet circuit being ground to the smallest possible air-gap, the holding magnet (11) being energized and the pivoting magnet (9) being de-energized after the pivoting piece (8) swivels to the left or right, when a preset end-position is reached, the holding magnet (11), when energized, holding the pivoting piece (8) in its position relative to the housing at the time energized and for the duration of the energization, the pivoting piece (8) being returned to the zero position by springs when energization is ended, and a mechanical coupling of the driven shaft (6) to the gearwheel (5) resulting from the swivelling of the pivoting piece (8) in either of the two possible directions.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lock actuating device using electrical signals,
In particular, it can be mounted on doors equipped with the well-known cylinder-operated locks and allows the manual operation of the key bolt and the latching of such locks with very low current input as well as the advantageous safety technology and operation of the entire locking device. The present invention relates to a device for use in conjunction with electrical signals to advantageously control an electromagnetic clutch device in a static configuration.

According to West German Published Patent Application No. 3218112Al, a lock can be effectively controlled with a very small electric current and can be used for a very long time without replacing the battery with a small battery. The device is known.

This solution is such that the drive shaft is guided coaxially through a driven shaft from outside the door into the mechanical lock itself or inside the door, and together with the drive shaft carries the first gear as well as one member of the electromagnetic clutch device. A disc is provided, the driven shaft comprising a second gear and a cam for operating the key bolt and latch of a lock of known construction, around the driven shaft being a component of the drive shaft when energized. A rotary plate is mounted which supports the other part of the electromagnetic clutch device, which is rotated by a disk to a mechanical stop, so that the electromagnetic clutch device can no longer be used for backclutching during further rotations of the drive shaft. It is based on the transition to

Due to the rotation of the rotary plate, the third gear is brought into mesh with the two aforementioned gears by means of a different device, thereby connecting the drive shaft with the driven shaft.

The advantage of this solution over previously known solutions is that the electromagnet of the electromagnetic clutch device should not itself perform any movement work, but rather the cam and via it the key bolt and latch of the mechanical lock from the outside of the door. The purpose is to use gear connections to help transmit large forces. Accordingly, the magnet can be made very small and its action can nevertheless be achieved with a very small current input.

However, there are essentially three drawbacks to the solution described above.

First, electromagnetic clutch systems that use a mechanical coupling of a gear drive must remain energized during the entire period of use since the gear drive would otherwise be disengaged again by the return spring. The resulting backlash between the two parts of the electromagnetic clutch system results in wear of said parts which limits the life of the entire system. Furthermore, the frictional force produced by the electromagnetic clutch device must also be added to the lock operating force, so that additional force must be utilized by the operator when operating the lock.

Second, safeguards against other unauthorized uses must be further improved. That is, the safety critical range of a mechanical lock lies in the range of the closing cylinder and that of the locking device. A critical area when using a safety fitting with drilling protection is that it reduces the closing cylinder itself, since this must necessarily be open for insertion of the lock. Successful removal of the closing cylinder or part thereof by tampering (violence) removes all protection against illegal opening of the door. The risks described with respect to mechanical locks are not limited to the locking devices addressed here in the same manner, since they utilize a closing cylinder that is attached to well-known mechanical locks and is similarly susceptible to tampering on the outside of the door. Applicable.

Thirdly, the gearing of the drive shaft is necessarily seen first from the inside of the door, so that the desired direct drive of the driven shaft is not possible from inside the door.

The object of the invention is to provide a locking device which is secure against external tampering and against low battery voltages, can be operated mechanically directly from the inside of the door and is otherwise described above. The object of the present invention is to provide a locking device which possesses all the advantages of the above, is virtually wear-free and is easy to use with little force.

According to the present invention, a pair of mutually parallel side plates in which the Kuratsui device is interposed, a drive shaft as an input shaft that protrudes from one of the side plates and is rotated by manual operation from the outside; A driven shaft that also projects from one side of the side plate as an output shaft for the drive shaft, and a driven shaft that is rotatably attached to the driven shaft and that is rotatably attached to the driven shaft and receives the rotation of the input gear fixed to the drive shaft. an output gear with a pin projecting into the shaft; a pivot lever pivotally mounted on an end of the driven shaft rotatably held on the other side plate; and a pivot lever at different radial distances of the driven shaft; two electromagnets fixed on top, a disc non-rotatably attached to the output gear and forming an armature for one of the electromagnets, and a disk attached to the other side plate and forming an armature for the other electromagnet. a coil for exciting each of the electromagnets; a guide ridged path disposed on a coaxial circumference with respect to the end portion and on the rotary lever; a plate provided with a bracket that contacts and prevents rotation in synchronization with the rotation lever, and a plate provided on the other side plate that defines the rotation of the rotation lever.
an electric contact for switching the operation of the coil arranged at two predetermined angular positions; and a slot in which the driven shaft is provided with a blind hole in its axial center having a spring therein and extending in the axial direction across the shaft hole. a rod-shaped cam having a core movable within the blind hole attached to the end of the spring, the spring pressing the plate against the slot, and movably fitting into the slot; is attached, the cam is configured to be lifted in the axial direction by the guide ridge to engage the pin, and by energizing the one electromagnet to attract the disc, The rotary lever and the disk are integrated, the one electromagnet is deenergized, and the other electromagnet is simultaneously energized to hold the driven shaft in a locked state, and when the electromagnet is deenergized, the When one electromagnet is energized, the rotating lever is simultaneously returned to its original angular position by another spring to release the locked state of the driven shaft, and furthermore, an electric signal from the outside causes the one electromagnet to be activated. The solution is to command the energization and deenergization of the other electromagnet and the re-energization of one electromagnet.

By the additional use of a magnet circuit with a locking action which de-energizes the magnet circuit with a rotational action when a certain rotational position is achieved, all the problems caused by the hitherto occurring backlash are eliminated. It will now be found that, after achieving a non-rotatable connection between the drive and driven shafts, a further, force-free, continued rotation is possible by means of a stationary magnet, an electromagnetic clutch device which is particularly satisfactory in terms of its labor-saving and current use. This results in an arrangement whereby material wear, in particular between the disc and the rotating magnet, is reduced to a minimum.

With the axially arranged arrangement, the drive shaft can be guided outside the door, spatially separated from the driven shaft below the mechanical lock. The driven shaft engages the hollow shaft of the special closing cylinder from the inside of the door, thereby achieving a non-rotatable connection, and the special closing cylinder itself operates the key bolt and latch of the mechanical lock by its locking cam. do. Since this special closing cylinder is semi-cylindrical and has connections not only on the inside of the door but also on the outside of the door, for reasons of safety it is a sufficient solution to protect against drilling without any opening being within the safety criticality. All safety critical ranges of mechanical locks and special closing cylinders on the outside of the door with steel plates are created. This solution is such that the driven shaft is non-rotatably connected with a closing cylinder inside the door, and the safety critical area of the closing cylinder and the lock is protected by a steel plate that passes through the outside of the door and is free to open in the safety critical area. This is achieved by being covered with

The driven shaft, which is accessible on the interior side of the clutch device, provides the advantage that the lock can be operated mechanically directly from the inside of the door.

According to the invention, a precise and free engagement of the cam is achieved. Furthermore, the connection task can be handled as effortlessly as in the original solution.

According to the invention, the fixed magnet automatically creates a current connection circuit when the desired rotational position is achieved.

According to the invention, a delay-free switching of the current from the rotating magnet to the fixed magnet is achieved in a very simple manner.

The present invention provides a simple indication that the battery voltage is approaching a critical low point and that battery replacement is imminent. The user is again alerted to this need on each use after this condition occurs until corrective action is taken and the battery is replaced.

According to the invention, the advantage arises for safety reasons that, if necessary, the actuating member for directly mechanically driving the lock provided on the inside of the door can be disconnected and closed in this disconnected position. It is important for safety reasons in doors with glass inserts, since the direct drive of the lock after breaking the glass insert and removing it inward might otherwise be operated. Furthermore, a sufficient position is created by the closable disconnection to ensure that, if necessary, the release of the lock from the inside of the door is prevented, e.g. by a child, in order to reliably prevent illegal access to the house. .

According to the invention, it is possible to utilize a common mechanical closing cylinder for the closure of the internal operating member in the disconnected position and for security against unauthorized new or modification programs of the code of the locking device. produce benefits.

According to the invention, with respect to known closing cylinders or locks, the safety critical range of the lock and closing cylinder can be effectively protected by the perforation-protected steel plate without opening the respective cylinders, so that the external resulting in a device that securely protects against forced opening attempts that may occur.

Further measures and their advantages will become apparent from the following description of embodiments of the invention.

In FIG. 1a, the clutch device is shown in a cross-sectional side view. A drive shaft 1 that can be driven from the outside of the door projects outside one side plate 36a of the case and is fixed to a gear 2 inside. The gears 2 and 3 are permanently meshed, the gears 3 being rotatably mounted around an axis 4 and used for force transfer and direction change.

The gear 3 meshes permanently at its side with a gear 5 which is mounted so as to be freely rotatable around a driven shaft 6 which also projects outside the side plate 36a.
A disk 7 is non-rotatably attached to the gear 5,
The disk 7 is made of soft magnetic material and constitutes one member of an electromagnetic clutch device which serves to pivot a pivot lever 8 made of non-magnetic material.

The second member of the electromagnetic clutch device is preferably U
It is formed by a rotating magnet 9 which is designed as a shaped magnet and supports a coil (spool) 10 for the generation of magnetic flux.

The energization of the coil 10 causes magnetic flux to flow back from one leg of the electromagnet through the disk 7 to the other leg.
The disk is thereby pulled tightly onto the U-shaped magnet.

The contact surfaces of the rotary magnet 9 and the disk 7 are arranged with respect to each other in such a way that the air space between the two parts is very small.
This results in a higher magnetic flux and a correspondingly stronger attractive force between disk 7 and rotating magnet 9 even at very small electrical excitations.

The rotation of the shaft 1 simultaneously rotates the disc 7, which causes the excited rotating magnet 9 to move the rotating lever 8.
rotates by a predetermined angle.

Attached to this pivot lever 8 is a further fixed magnet 11, particularly U-shaped, which can be excited by a coil 12. The magnetic circuit of these magnets is closed by a plate 13 which is fixedly arranged in the case. However, it is also possible to arrange the fixed magnet 11 fixedly in the case and to fasten the plate 13 closing the magnet circuit to the pivot lever 8. The contact surfaces of the fixed magnet 11 and the plate 13 are likewise arranged with respect to each other in such a way that the air space between them is very small.

Based on the rotation of the disc 7 and the rotating magnet 9 excited by the rotation of the rotating lever 8, when the fixed magnet 11 is not excited, a predetermined rotation angle is made in one or the other rotation direction. When the electric contact 1 switches the current from the rotating magnet 9 to the fixed magnet 11
4 and 15 are activated. The pivoted lever 8 thereby remains held in its occupied position relative to the case as long as the current flow is maintained through the coil 12. The attractive force between the disk 7 and the rotating magnet 9 is maintained. Due to this adsorption force, the disc 7 can maintain its original state without applying any particular external force.

The rotation of the disc 7 accompanying the rotation of the driven shaft 6 is controlled by a rotating lever 8 pivotally connected to the driven shaft at its end 6a.
When the coil 10 rotates and reaches the operating position, the current is switched from the coil 10 to the other coil 12, thereby creating an attractive force between the fixed magnet 11 and the plate 13, and maintaining the fixed magnet 11 and the plate 13 free. Further, when the fixed magnet 11 is deenergized, the rotating lever 8 is returned to its original position by a spring (not shown).

As shown in FIG. 1b, the pivot lever 8 has arcuate guide ridges 16, 17, 18, 19 which, upon rotation of the pivot lever 8, further axially displace a plate 20 arranged coaxially therewith. stipulates. The bracket 21 non-rotatably connects the plate 20 in the vicinity of the other side plate 36b, thereby realizing axial movement of the plate 20 by rotation of the pivot lever 8.

FIG. 2 shows the device for connecting the driven shaft 6 to the output gear 5 and thus to the drive shaft 1 in detail. The cam 22, which is attached to the slot 6a of the shaft 6 by moving the plate 20 upward in the axial direction, is a rod-shaped body attached to the core 6 attached to the end of the spring 32 so as to cross the slot. is moved upward until it fully engages the pin 24 that is connected to the gear 5 against the force. A connection between the drive shaft 1 and the driven shaft 6 is thereby achieved, via which very large forces can be transmitted. In order to prevent the cam 22 from being mounted on the pins 24 during upward movement of the plate 20 and the concomitant movement of the cam 22, a gear wheel is provided so that the cam 22 is always pushed into the free space between the pins 24. 5
Only in such an angular position of the driven shaft 6 connected to the rotary magnet 9 is a power supply produced.

This is achieved in that the ends of the coil 10 are connected to the case and also to the drive element. This power supply at the end of the winding occurs in a plate 25 which is insulated and mounted to the case. A further insulating member 26 is provided between the plate 25 and the disc 7, which is connected to the shaft 6 and rotated thereby. Contact springs 27 are arranged in the two cavities of this insulating member 26, which effect a current transfer from the plate 25 to the disk 7 and thus to the coil 10. The disk 7 carries on its side facing the contact spring 27 an insulating layer pressed against that segment where it is not desired to power the coil. This ensures that the coil 10 can only be energized in that angular range of the gearwheel 5 relative to the shaft 6 in which the raising of the cam 22 is possible without hitting the pin 24.

Figure 3 shows the spools 10 and 1 of both magnets 9 and 11.
The energizing current circuit of No. 2 is shown in detail.

The switch 28 is formed by an electronic control system in which the power supply 29 is switched to the spool 10 of the rotating magnet 9 by entering the correct code. switch 28
The current flows back through the resistor 30, the spool 10 and one or more forward-connected diodes 31, 32 for the power supply 29.

Due to the rotation of the disk 7 due to the bias of the rotary magnet 9, the rotary lever 8 is thereby rotated until one of the switches 14 or 15 is closed. Current thereby flows through the coil 12 of the fixed magnet 11.

The resistances of coils 10 and 12 are associated with resistor 30 and the threshold voltage formed by diodes 31 and 32 is
The current flow through the coil 10 is chosen such that the current through the coil 10 continues to drop to zero. In this method, the rotating magnet 9 can be moved from the fixed magnet 1 by simple means.
1 is achieved without delay. The rotating magnet 9 performs the effect obtained on the disk 7 for a long time so that the current through the coil 10 is sufficiently large.

With a drop in the battery voltage, for example to half of the rated voltage, a situation gradually arises in which the current through the coil 10 is insufficient to generate the magnetic flux of the rotating magnet 9 necessary for attracting the disc 7. In order to temporarily increase the current flow again in this case, a switch 33 is connected in parallel to the resistor 30.

This switch is closed by the key 34 designated by "Reserve", thereby causing the resistor 30 to
is performed without current limiting and thereby the current flow is increased with respect to the closing time of the key 34. This is very advantageous for avoiding problems due to low battery voltage and at the same time is very useful for indicating to the user that the battery needs to be replaced.

This key 34 can be integrated into the current code entry keyboard of the locking device. In this case, key 34 is at the same time the active key of this keyboard and, in addition to its active designation as a code input element, supports the designation "Reserve".

FIG. 4 shows the overall structure of the locking device with the closing cylinder and the clutch device with the actuated shaft. The entire safety critical lock area is covered by a steel plate 35 which is screwed onto the inside of the door.

By means of a small opening in the lower region of this steel plate, the shaft 1 is guided below the lock and thus outside the door in a safe neutral range. axis 1
The energized rotary movement of the rotary magnet of the clutch device 36 is guided in the correct direction of rotation within the cylinder 37 through the energizing mechanism. When the clutch device 36 is not energized,
Axis 1 can rotate freely.

The shaft 1 is non-rotatably connected via a rotation knob 38 and an intermediate shaft 39. By appropriate selection of the intermediate shaft 39, which consists of a set of stepped length shafts, the locking device can be advantageously adapted to the thickness of each door during subsequent installation.

The driven shaft 6 is easily actuated from the rear side of the clutch device 36 and thereby allows direct actuation of the closing cylinder 37 by means of the operating member 40 from inside the door. It is mounted rotatably and pushably against a spring force within an inner fitting 41 which covers all the components on the inside of the door. A mechanical connection is maintained in the clutch device 36 by pushing down the actuating member 40 by a few millimeters.

A rotatable plate 43, which is pivotally connected to the clutch device 36, can be closed between the operating member 40 and the clutch device 36 by means of a mechanical lock 42. The operating member 40 and the clutch device 36 are thereby
The connection with is cut off.

Another solution for decoupling the fixed and non-pullable actuating member 40 from the driven shaft 6 is to use a spring in the actuating member 40 which engages the slotted shaft 6 and is located within the actuating member 40. It consists of incorporating a coupling plate, not shown, which has sides that are pressed together.

In the correct position of the actuating member 40, in which the coupling plate is perpendicular to the cover plate 43, the coupling plate limited by the side faces can be attached to the actuating member 40 by the cover plate 43.
Slip inside. The actuating member 40 on the shaft 6 is thereby
The binding of is preserved.

The cover plate 43 is formed in both solutions so that it can be closed in its covering pivot position by means of a mechanical lock 42, preferably a closing cylinder. The same closing cylinder can additionally be provided as a programmable cylinder, in which case the user of the locking device can activate the locking device as soon as he brings the lock of this closing cylinder to a certain other position. It is particularly advantageous that key information stored as a code can be inserted or changed. First, when a switch (not shown) is operated in this position, the program switching means (not shown in detail here) is effectively switched only in the closed state.

The closing cylinder 37, which is inserted into the lock 44 and produces the movement of the key bolt, has a hollow shaft 46 with a cam groove in which a closing/opening cam 45 is fastened. The driven shaft 6 projects into this hollow shaft and transmits the rotational movement from the driven shaft 6 to the closing/opening cam. hollow shaft 4
The insertion depth of the driven shaft 6 in the driven shaft 6 is variable over a predetermined distance. Thereby, the same closing cylinder and clutch device can be advantageously implemented on doors with different door thicknesses.

FIG. 5 shows the embodiment of the special closing cylinder 37 in detail. A hollow shaft 46, which is fixed to the cam 45, is inserted into the cylinder body in such a way that it can only be accessed on one side. The other side of the cylinder is closed and protected against drilling by a steel pin 47. The embodiment of FIG. 5 is formed as an airfoil cylinder.
However, it can equally well be implemented as a round or oval cylinder or in other configurations.

[Brief explanation of drawings]

1a and 1b are a sectional side view and a sectional plan view showing a device for coupling a drive shaft to a driven shaft; FIG. 2 is a partial sectional view showing details of the shaft coupling;
Figure 3 is a circuit diagram showing the current circuit for switching the current from a rotating magnet to a fixed magnet with a reserve connection, Figure 4 is an exploded view showing the overall arrangement of the locking device, and Figure 5 shows a special cylinder. FIG. In the figure, code 1 is the drive shaft, 2, 3, 5 are gears, and 6
is a driven shaft, 7 is a disc, 8 is a rotating plate (lever), 9
is a rotating magnet, 10 and 12 are coils (spools),
11 is a fixed magnet, 13 is a fixed plate, 14, 15 are switches, 16, 17, 18, 19 are starting slopes, 2
0 is a plate, 22 is a cam, 24 is a pin, 25 is a plate, 2
6 is an insulating material, 27 is a contact, 30 is a resistor, 31,
32 is a diode, 33 is a transistor switch, 34 is a key switch, 35 is a steel plate, 37 is a closing cylinder, 40 is an operating member, 42 is a lock, 43
is a cover plate, and 44 is a lock.

Claims (1)

[Claims] 1. 1 parallel to each other with a clutch device 36 interposed therebetween.
A pair of side plates 36a, 36b and one side plate 36a
a drive shaft 1 as an input shaft which protrudes from and is rotated by manual operation from the outside; a driven shaft 6 which also protrudes from one side of the side plate and serves as an output shaft for the drive shaft; and a driven shaft 6 which is fixed to the drive shaft. an output gear 5 which is rotatably attached to the driven shaft and has a pin 24 projecting inward, to which rotation of the input gear 2 is transmitted; and the driven gear 5 is rotatably held by the other side plate 36b. a pivoting lever 8 pivotally mounted on the end 6a of the shaft, two electromagnets 9, 11 fixed on the pivoting lever at different radial distances of said driven shaft and non-rotatably mounted on said output gear; The disk 7, which is attached to the other side plate 36a and forms an armature for the other electromagnet 9, and the plate 13, which is attached to the other side plate 36a and forms an armature for the other electromagnet 11, are excited. coils 10, 12, guide ridges 16, 17, 18, 19 disposed coaxially on the circumference with respect to the end portion 6a and on the rotary lever; A plate 20 provided with a bracket 21 for preventing synchronous rotation with the rotation lever, and the coils arranged on the other side plate 36b at two predetermined angular positions that define the rotation of the rotation lever. Electrical contacts 14, 15 for switching the operation of
Furthermore, the driven shaft 6 has a spring 2 inside its axis.
3 and a slot 6b extending in the axial direction across the shaft hole,
A core 6c movable within the blind hole is attached to the end of the spring, and a rod-shaped cam 22 is attached which presses the plate 20 with the spring and movably fits into the slot 6b. The cam is lifted in the axial direction by the guide ridge and engages with the pin 24, and by energizing the one electromagnet 9 and attracting the disk 7, , the rotary lever 8 and the disc are integrated, the one electromagnet is deenergized, and the other electromagnet 11 is simultaneously energized to hold the driven shaft 6 in a locked state, and the electromagnet 11 is When energized, one of the electromagnets is energized, and at the same time, another spring returns the rotating lever 8 to its original angular position, releasing the locked state of the driven shaft. A lock operating device based on an electric signal, characterized in that commands are given to energize the one electromagnet 9, deenergize the other electromagnet 11, and reenergize the one electromagnet. 2 By the rotation of the rotating plate 8, another plate 2
0 is moved axially and similarly moved in the same direction by said cam, thereby causing said pin 2
4, the cam 22 engages with the output gear 5, thereby establishing the connection between the driven shaft 6 and the output gear 5. Lock actuator. 3. With an insulating member 26 connected to the driven shaft 6 with inserted contacts 27, the power supply from the plate 25 is carried out on the segmentally insulated disc on the side facing the insulating member and associated therewith. Claim characterized in that it occurs only at the position of the driven shaft associated with the gear 5 on one side plate 36a and on one coil 9, where free engagement of the cam 22 with respect to the pin 24 is possible. A lock actuating device using an electric signal according to item 1 or 2. 4. According to claim 1 or 2, the rotary lever 8 operates a respective switch 14, 15 which causes the other electromagnet 11 to conduct current in its two possible rotary positions. Lock actuating device by electric signal as described. 5. The coil 10 of the one electromagnet 9 and one or more diodes 31, 32 are connected in series, the coil 12 of the other electromagnet 11 is connected in parallel to the coil and the diode by the switch, Claim 1, characterized in that a resistance is assigned in connection with the resistance 30 of both said spools so that the current through the coil 10 of said other magnet 9 is dropped to a very small value. A chain actuating device using an electric signal according to item 2 or 4. 6. The electrical device according to claim 1, 4 or 5, characterized in that a transistor switch 33 is arranged in parallel with the resistor 30 and is connected by a key switch 34. Lock activation device by signal. 7. The key switch 34 is at the same time an operating key of the code input keyboard of the locking device, and this operating key supports the designation "Reserve" in addition to its operating designation. A lock actuating device using an electric signal according to item 6. 8. The driven shaft 6 is releasably connected to a rotatably movable operating member 40 that can be operated from the inside of the door, and the rotatable protective cover plate 43 that can be operated from the inside of the door is in its rotational position. The electric signal lock according to claim 1, wherein the driven shaft is prevented from being releasably connected to the operating member, and the rotating position of the cover plate is configured to be lockable. Actuation device. 9. The pivoted position of the cover plate 43 is lockable by a mechanical lock 42 mounted on the inside of the door, the mechanical lock locking in one or more other closed positions of the key. Claim 1 or 8, characterized in that the locking device can be operated to change or newly store key information stored as a code of the locking device. Lock actuating device by electric signal as described. 10 The driven shaft 6 is non-rotatably connected to a closing cylinder 37 inside the door, and the safety critical area of the closing cylinder and the lock is protected by a steel plate 35 that penetrates outside the door and is free to open in the safety critical area. A lock actuating device using an electric signal according to claim 1, characterized in that the lock actuating device is covered with an electric signal.