DE2401291A1 - Electric cylinder type lock - has solenoid with locking piece to plunger point, and is guide groove supported - Google Patents

Abstract

Cylinder lock in which the knob inside the door is rotatably mounted on to the lock case while the knob outside the door is rigidity fitted on to it and the retractor inside the lock case is either worked by turning the knob inside the door or worked, thorugh the medium of an actuator, by the operation of a cylinder lock incorporated in the knob outside the door, thereby unlocking the latch. The lock is further provided with the following: a solenoid fitted inside the spindle which is an integral part of the knob inside the door and a locking piece which, being fitted on to the point of a plunger of the solenoid, is supported by a guide groove in the bearing which is an integral part of the lock case, slides along the groove in an unrotatable state, and is engaged with and disengaged from a slot provided in the actuator.

Description

"Lock" The invention relates to a lock, in particular a cylinder lock, The lock is designed according to the invention so that it only works together be opened by mechanical means and electrical means such as a solenoid can.

Usually for rooms or apartments, e.g.

Hotel room, a cylinder lock used, which is through security against burglary. However, there is a major disadvantage of these locks in this, that they can easily be opened with a duplicate key can. I. E. a break-in cannot be prevented once a duplicate key is found manufactured or a key was stolen.

The invention avoids this by creating a lock which has an additional solenoid-operated fuse. The lock according to the invention can also be designed so that it only opens with the consent of another can be.

Furthermore, the lock according to the invention can be designed so that e.g. for the automatic control of high-rise buildings or apartment buildings an opening of the lock only after or when a reading device such as a card scanner is operated or card reader can be opened. The lock according to the invention can find general use as a cylinder lock.

The various possibilities outlined can be used individually or in Whole combination or sub-combinations can be used.

In a preferred embodiment of a cylinder lock according to the invention is an inner handle rotatably mounted äm lock housing while a Outside handle is firmly seated on this. A retractor, an actuator for the Bolt or the latch of the lock can on the one hand by in the housing Turning the inside handle, but also by turning the cylinder of the cylinder lock can be opened from the outside using the key. There is one with inside the inside handle connected spindle arranged a solenoid. A locking piece protrudes with a radial projection in a guide groove in one with the lock housing connected bearing so that the locking piece can not be rotated. The locking piece is axially displaceable by means of the piston of the solenoid, between two Positions in.deren one of them to be rotated in a slot of the lock cylinder Actuating sleeve for the retractor protrudes while it is in its other position Releases the slot so that the actuating sleeve is rotated and thus the lock is opened can be.

The following are preferred embodiments of the invention based on the drawing explained. With regard to the geometrical relationships and the training the various elements and parts of the castle as well as their corresponding electrical circuits, express reference is made to the drawings, which hereby can also be made the subject of the disclosure of the application.

Figure 1 shows an axial section through an electric lock according to the Invention in a blocked state.

FIG. 2 shows the unblocked one in the same representation as FIG State.

Figure 3 shows a circuit for actuating the electromagnetic Blocking device.

Figure 4 shows a block diagram for the control of the electrical Blocking device by means of a card scanner or card reader.

The cylinder lock shown in Figures 1 and 2 carries in the usual way on the housing 11 a rotatable inner handle 12, while the outer handle 13 is not rotatable is attached to the lock housing. By turning the inside handle 12, by means of the on the inside handle non-rotatably seated hollow spindle 14 and a nose at the end of this spindle a retractor 15 can be operated to open a latch 16 or a trap Bring position of the lock. The cylinder arrangement 17 is located in the outer handle 13 attached to the lock. To open from the outside a key K has to be used Way introduced into the lock cylinder and with the help of the key the cylinder to be turned around. If the lock cylinder is now turned by means of a key K, in the manner shown in the drawing, a driving square 18 the actuating sleeve 19 also rotated so that one provided at the end of this sleeve The nose moves the retractor 15 and thus brings the latch 16 into the open position.

In the actuating spindle corresponding to the actuating sleeve 19 of the outside handle 14 of the inner handle is axially non-displaceably attached a solenoid 20, which an excitation coil 21 * has a core 22, a piston 23 and a spring 24 endeavors to move the piston in the manner shown in FIG. 1 to the outside handle to move towards. The end of the piston 23 on the outside handle side carries a locking piece 25, which has a radially protruding nose through an axial slot 19 'of the actuating sleeve 19 protrudes outward when the piston 23 is pushed towards the outside handle Position. The locking piece 25 also protrudes with its nose into a guide groove 26 'in a bearing part 26' non-rotatably connected to the housing 11, so that the locking piece 25 is thereby prevented from rotating. Since in the case of the one pushed to the left in FIG Position the locking piece 25 at the same time through the slot 19 'of the actuating sleeve 19 protrudes, in the position shown in FIG. 1, actuation of the lock is therefore possible not possible using the key K in the lock cylinder.

In the closed position shown in Figure 1, the locking piece 25 held by the spring 24, which presses the piston 23 to the left in FIG. Nevertheless, the lock can be opened from the inside at any time by turning the inside handle can be opened via the actuating spindle 14.

Starting from the state shown in FIG. 1, the excitation coil 21 of the solenoid 20 is excited and its core 22 is magnetized, the piston 23 becomes attracted against the elastic force of the spring 24 from the core 22, whereby the locking piece 25 comes out of engagement with the slot 19 ′ of the actuating sleeve 19. Now you can use of the key K over the lock cylinder and the square 18 the actuating sleeve 19 rotated and thus the bolt 16 of the lock can be withdrawn. This electric The unlocked position of the lock is shown in FIG. As soon as the coil 21 de-energized and the core 22 is no longer magnetized, the piston 23 falls below the force of the spring 24 back to the left and the nose of the locking piece 25 can re-enter the slot 19 'of the actuating sleeve 19 as soon as the actuating sleeve 19 back into its position corresponding to the advanced position of the bolt 16 (e.g.

by the schematically indicated spring in the hollow retractor (15) is brought back.

According to the above, the lock can only be operated from the outside when the solenoid is energized.

So, for example, is the electrical circuit of the solenoid like this taken so that this can be excited from the porter's place in the building, so needed to enter the room secured with a lock according to the invention Consent of Porters what a high level of security against break-ins and other unauthorized actions in the room.

Since the lock is open at any time from the inside, regardless of this the escape route is secured in an emergency.

If you arrange a microswitch SW 1 shown in Figure 3 so that it is switched on and off when the locking piece is moved and is arranged another microswitch SW 2 so that it switches on and off when the door is moved is switched off, one also sees in the manner shown in FIG Lamp L and a buzzing B in front of the porter, so you can go from this place at any time can be checked whether the lock is open or closed and whether the Door is open or closed. This creates a central control against break-ins also allows for a variety of rooms.

According to the invention it is also possible that the switch-on command for the solenoid takes place via a card scanner. Then the lock is opened only possible for those who have both a key and the card. If e.g. a card scanner or card reader is provided at the entrance of the building and at the same time with the opening of the entrance door by actuating the card scanner, the solenoid of the lock according to the invention switched on, only the one who passes through the main entrance. could enter with with his key die Open the room door. This allows the control of a building or apartment building without staff.

The lock according to the invention can be used anywhere.

It can also be used in conjunction with other rationalization facilities control in hotels, high-rise buildings or apartment buildings.

Figure 5 shows an exploded perspective view a self-holding device 30, which after excitation and from excitation still the locking piece 25 holds in the unlocked position until the solenoid is re-energized and de-energized again will. This device has an actuating ring 31 of numerous projections 31A having a tapered surface 31a on the inner circumference, a locking ring 32 of is circumferentially provided with a group of slots and tapered surfaces, i. e. a deep slot 32A, a shallow slot 32B and, to the shallow slot Adjacent 32B, one inwardly tapered surface 32a and one outwardly tapered Surface 32b carries. The device also has a rotor 33, which is at the end of the The piston is rotatably mounted about its axis and carries a triangular wart 34, which is attached to the circumference of the rotor 33 and between the two rings 31 and 32 seated.

In the closed state shown in Figure 1, the piston 23 is for Actuating sleeve 19 moved towards and the protrusion 34 of the rotor 33 at the end of the piston lies in the deep slot 32A of the locking ring 32. When the solenoid 20 is in this position is excited and the piston 23 in its release position, the locking piece 25 meanwhile urgent situation is pushed back, the wart 34 is withdrawn at the same time. It encounters an inclined surface 31a of the actuating ring 31, whereby the Rotor 33 is rotated one step and to the groove between the tapered surfaces got. When the excitation coil 21 is switched off in this position, the begins Piston 23 to return to the locking position under the influence of the spring force. However, because the inwardly tapered surface 32a of the locking ring 32 in the opposite the gutter is in a standing position, if the pin hits it, it is under the influence the inclined surface 32a is rotated further and enters the shallow slot 32B. He prevents In this way, in FIG. 1 or 2, the piston 23 is pushed to the left into the blocking position, so that the locking piece 23 outside the slot 19 'in its the lock for actuation is held by the cylinder releasing position (Fig. 5).

If the solenoid 20 is now in this position of the piston 20 again excited and thereby pushed the piston 23 back, the wart hits the inclined surface 31A of the actuating ring 31 opposite the shallow slot 32B, whereby the wart 34 (rotor 33) is rotated and arrives in front of the next channel.

When switching off, the piston 23 moves to the left again and the wart encounters the outwardly tapered surface 32b, slides on this surface while rotating along and enters the next slot 32A, the locking piece 25 in the Locked position in the slot 19 'occurs.

If the excitation coil is energized again, the above is repeated Game so that the lock without constant excitation of the coil both in blocked as well as in an unblocked state. As for an operation the self-holding mechanism just described and the corresponding blocking or Unblocking of the lock a switch-on time of 1 - 2 seconds is sufficient no risk of the coil burning out.

In the embodiment just described is the self-holding device mechanically constructed. However, there is also the possibility of a self-holding device formed by instead of the core 22 of the solenoid 20 a ferromagnetic one Material such as ferrite or the like is used and the direction of current to the excitation coil 21 is changed with each blocking or unblocking and thus the core demagnetized or magnetized.

-Patent claims-

Claims (4)

Claims: Cylinder lock with an inside handle on the lock housing rotatable and an outside handle is fixedly attached, and the bolt by turning the inside handle or by turning the lock cylinder built into the outside handle can be actuated, characterized in that an electric solenoid (20) for control the position of a locking piece (25) is provided, which, depending on its position, the actuation the bolt (16) prevented or allowed by turning the lock cylinder. 2. Cylinder lock according to claim 1, characterized in that the Solenoid (20) inside a hollow spindle (14) connected to the inner handle (12) sits that the locking piece (25) of a guide groove (26 ') in one with the housing connected part (26) is prevented from rotating and by means of the piston of the solenoid axially in and out of locking engagement with the bolt actuating device (18, 19) of the Lock cylinder can be brought. 3. Lock according to claim 1 or 2, characterized in that it is with a self-holding device is provided, which the locking piece each after actuation by the solenoid in the open or locked position even when the solenoid is de-energized holds. 4. Lock according to claim 3, characterized in that the core of the Solenoid made of ferromagnetic material such as ferrite and the like, and by alternation the direction of current in the excitation coil is demagnetized or magnetized, whereby Piston and locking piece in the open or locked position even after the coil is de-energized Can be held.