EP0983412A1

EP0983412A1 - Electromagnetically controllable safety lock

Info

Publication number: EP0983412A1
Application number: EP99911579A
Authority: EP
Inventors: Günter Mauer
Original assignee: Mauer GmbH
Current assignee: Kaba Mauer GmbH
Priority date: 1998-01-30
Filing date: 1999-01-29
Publication date: 2000-03-08
Also published as: WO1999039065A1; US6318136B1; DE19803648A1

Abstract

The invention relates to electromagnetically controllable safety locks in the field of holding magnets. The fundamental principal is that the electromagnet influences a control and blocking element such that the locking bar can be retracted during an opening impulse. The aim of the invention is to simplify, to increase the reliability of, and to expand the area of application of such locks. According to the invention, the locking bar (7) moves a slider (5) which is provided with teeth and which carries a blocking plate (2) equipped with a passage pin channel (2a). The blocking plate (2) is coupled via a spring (12) to a control plate (3) which has an angularly offset passage pin channel (3a). The control plate (3) supports an armature (13a) which can be held by an electromagnet (13) fixed to the housing when the locking bar (7) is subjected to a control movement. Both channels are aligned with the lock axis during an opening action such that the passage pin has a free path.

Description

1

Electromagnetically controllable security lock

Technical field

The invention relates to an electromagnetically controllable security lock with a bolt having a tour pin and an electromagnet acting as a holding magnet, which blocks or releases the retraction of the bolt via control and blocking elements.

State of the art

Such a lock has become known from EP 0427188. The electromagnetically controlled security container lock described there has an electromagnet fastened in the housing, which is opposed by an armature mounted on a locking lever. The intricately shaped locking lever is coupled via a bearing pin, control cams and a spring to a control lever that has a touring channel. Furthermore, a locking slide is provided which carries a touring pin which engages in the control lever. The blocking or release by swiveling movements requires an exact interaction of holding magnetic forces, control cams, control pins, bearing pins, springs and touring pin. The parts may hardly have any bearing play or wear, otherwise they will fail due to canting.

EP 0228027 also relates to an electromagnetically controlled security lock with a housing, in the front opening of which a bank locking mechanism is accommodated in addition to a customer lock. An electromagnet is accommodated in a recess on the back of the housing. A locking lever and a control lever are arranged under the main bolt, which is relatively difficult to access. The locking lever carries a magnet armature, which faces the yoke of said electromagnet. Here too, the precise interplay of the magnet, control lever, locking lever and tour pin is important, although close manufacturing tolerances are required to ensure permanent functionality.

Presentation of the invention

The invention has for its object to improve a lock with the features mentioned in the introduction so that it manages with particularly easy to manufacture elements, is reliable in function and can be used in a variety of ways. 2

According to the invention, the bolt moves a toothed slide which takes along a locking disk provided with a tour pin channel. Furthermore, this locking disk is coupled via a spring to a control disk having an angularly offset tour pin channel. The control disc carries an armature, which is held by the electromagnet when energized, whereby both channels are aligned with the lock axis and allow the tour pin to pass.

The new lock with rotatable locking and control elements can basically be used in two variants. In type A, it has a normal, heavy bolt that is moved using a handle using a drive nut. In type B, only one auxiliary bolt with a drive pin is provided. The drive pin dips into the bolt of a main lock, which can be designed as a double-bit lock or as a combination lock. The combination enables the "four-eyes principle" to increase security. The elements required for control are identical in both designs. In a preferred embodiment, the risk of lock blockage is significantly reduced by the fact that two identical electromagnets are provided, which can be controlled optionally are.

Description of the drawings

The design A of the invention is explained with reference to FIGS. 1-13 of the drawings.

Another embodiment is described in Figs. 14-20.

1 shows the exploded parts of the castle,

2 shows a longitudinal section along the lock axis A-B,

3 is a top view of the open lock,

4 the drive nut in perspective,

5 the control elements in the blocking phase,

6 these elements in the opening phase,

7 the drive nut with a slide switch,

8 housing, drive nut and latch in perspective,

9 the bolt and a slide switch actuated by it,

10 parts of a relocking system in perspective,

11, 12, 13 longitudinal sections of the relocking system in different states. 3

14 shows a further embodiment in an exploded view

presentation

15 shows some individual parts in the same representation,

16 these parts in plan view,

17 some functional parts in perspective,

18 shows the most important control elements in the same representation,

19 these parts in side view,

Fig. 20, the parts mentioned from above.

In Fig. 1, 1 denotes the housing, which u.a. has a bearing mandrel la and a bearing bush lb. The mandrel la receives a locking disk 2 and a control disk 3. A drive nut 4 is guided in the bearing bush 1 b. Under the nut is a toothed slide 5, which is moved by the drive nut against the force of a spring 6. The nut 4 lies under the bolt 7 and drives it by means of the dome 4a. A leg spring 8 supports the locking movement. This spring engages the nut 4 on a mandrel 4d. The second end hangs on a dome lc of the housing 1. As a so-called dead center spring, it supports both the reaching of the locked position and the open position of the drive nut 4. Under the influence of the spring, undefined intermediate positions of the drive nut are avoided.

The parts are held together by a castle ceiling 9. A bearing bush 9a encloses the drive nut 4. 10 denotes a hollow drive shaft which fits into a profiled opening in the drive nut and carries a handle (not shown). Control lines can be passed through the shaft. Behind the housing 1, a second base plate 1 1 is shown, which has a raised edge. This creates a protected cavity on the back of the housing, which receives the control electronics of the lock.

Fig. 2 shows a longitudinal section along the lock axis A-B. The bearing dome 1 a, the disks 2 and 3, the drive nut 4 and the bolt 7 can be seen in the housing 1.

From Fig. 3 it can be seen that the locking disc 2 and the control disc 3 are coupled by a spring 12. In Fig. 4 the rear of the drive nut 4 is shown. A control surface 4b can be seen which moves the slide 5 shown in FIGS. 5 and 6 via the dome 5a.

Fig. 5 shows the control elements pulled apart in the locked position. In the idle state, the secant 4c of the drive nut 4 lies parallel to the lock axis A-B, that is to say horizontally. If you turn the nut 4 clockwise by about 30 °, the slide 5 moves upwards and the locking disc 2 rotates to the left until its tour pin channel 2a is aligned with the lock axis A-B. Under the influence of the spring 12, the control disk 3 was pivoted to the left.

If none of the electromagnets 13, 14 fixed to the housing is excited, none of the armatures 13a, 14a mounted on the control disk 3 can be held. Since the adjustment angle between the tour pin channels 2a and 3a is retained, the toggle pin of the bolt is blocked.

The result according to FIG. 6 is different. A holding current in one of the magnets 13, 14 causes the control disk 3 to stop, while the locking disk 2 rotates to the left while the spring 12 is stretched. Both tour pin channels are aligned with the lock axis A-B and allow the bolt to be withdrawn fully.

The control curve 7a of the bolt 7 is designed such that it is not moved during the interrogation movement of the drive nut 4. The bolt head 7b thus remains immersed in the striking plate along the entire bolt path length until the opening process begins.

5 and 6 it can be seen that the locking disc 2 in the open position on the

Slider 5 abuts. The mechanical stop ensures that the tour pin channel is exactly aligned when the tour pin of bolt 7 approaches.

The exact opening position of the tour pin channel 3a is due to the location of the

Electromagnets 13, 14 specified. The locking disc 2 is provided with arms 2b, 2c, which carry pins 2d, 2e. These pins take the control disc 3 back when you let go of the handle during the unsuccessful attempt to open and the spring 6 the slide

5 presses down.

Since the armatures 13a, 14a basically abut the yokes of the electromagnets 13, 14, a very small holding current is sufficient to actuate the lock securely. If one circuit fails due to a fault in the coil or the supply line, the other magnet can take over its function. It is therefore extremely unlikely that a safe will have to be opened by force because the lock has failed.

7, 8 and 9 show how one can actuate a slide switch 15 via the bolt 7, which activates a microswitch for the closing message. The microswitch, not shown, is plugged onto the holding pins 16 in the housing 1.

Fig. 7 shows the drive nut 4 and the slide switch 15 from behind. When the drive nut 4 is rotated in the direction of arrow 17, the slide 15 moves in the direction of arrow 18 upwards.

In Fig. 8 housing 1, drive nut 4, slide switch 15 and bolt 7 are shown pulled apart. The slide switch 15 has a control surface 15a against which a web 7c of the bolt 7 abuts.

Fig. 9 shows how the slide 15 is pressed down when the bolt 7 is retracted. The slide switch 15 is preferably made of elastic plastic. 15b denotes a molded, rod-shaped spring, the nose of which engages in recesses on the housing 1.

Fig. 10 shows a relocking system for the lock described. The base plate 11 carries a pin 11 a which pushes up a relocking element 19 guided over the bolt 7 in the housing 1. A cuboid projection 19a gets into the path of a locking edge 7d of the bolt 7 when the base plate 11 is knocked away.

In Fig. 11 base plate 1 1, housing 1 and bolt 7 and the lock cover 9 are shown pulled apart. A spring 20 rests in the ceiling 9 and presses against the part 19 / 19a.

12 shows the relocking system in the state of normal functioning. The locking edge 7d can pass the projection 19a with its locking edge 7d.

In Fig. 13 it can be seen how the element 19 slides upwards when the base plate 11 is removed and the projection 19a blocks the bolt 7. 6

In Fig. 1, a hollow shaft 10 is shown, which is made of a multi-spline, which fits into a corresponding recess of the drive nut 4.

3, 5 and 6, the drive nut 4 is drawn with a previously common square recess. Drilled square shafts could also be used to route the control cables.

14 shows another design of an electromagnetically controllable

Security lock.

The housing 21, which is preferably produced using the die casting method, has

Mounting holes and an opening 21a on a bearing pin 21b. The the

Control solenoids 22, 23 are fixed in the housing so that they face the armatures of the control disc 24. This control disc and one

Locking disc 25 are pivotally mounted on the mandrel 21b to a limited extent. The parts 24 and 25 are coupled to one another by a light tension spring 16.

A toothed drive shaft 27 engages non-positively in a nut 28. Your is one

Assigned mandrel disc 29, the mandrel 29a acts on the cam 30a of a bolt 30. The nut 28 has domes 28a, which alternatively in pairs 29b of holes in the disc

29 fit.

With 31 a slide is designated, the cam 3 la in a recess 28b the nut

28 slides. A spring 32 pushes the slide down. He has the task of his

Toothing 31b to move the locking disk 25 until the tour pin channel 25a is horizontal and aligned with the tour pin channel 24c.

Furthermore, the lock includes an intermediate plate 33 on which a slide switch 34 can be seen, which is vertically displaceably mounted in a recess 33d.

A lock cover 35 holds all the parts described together and protects them against external influences. In the extension axis of the drive shaft 27 is in the ceiling

Break-in curve 35a incorporated. The material is said to yield at this point when the shaft 27 is forced inward to knock the entire lock away.

When the lock is mounted, the drive shaft 27 ends in the nut 28, the cylindrical one

Approach 28c is closed by a cover 28d. Between approach 28c and

Cover 28d is also provided with a predetermined breaking line. 7

If a burglar hits the shaft 27, the nut 28 with the dome plate 29 is first driven against the bolt 30. This bolt is weakened in the area of its control curve 30a to such an extent that it bends. As a result, two projections 30b attached to the left edge are pressed into recesses 33a of the intermediate plate 33. The bolt is thus additionally locked and protected against manipulation. If the cover 28d bursts when the drive shaft 27 is hit hard enough, the shaft 27 penetrates until it reaches the lock cover 35. There it deforms the sheet in the area of the predetermined breaking line in such a way that it penetrates and the further use of force is ineffective.

The tear-off forces at the predetermined breaking points are dimensioned so that they are significantly smaller than the holding forces of the fastening screws.

In Fig. 15 the nut 28, the bolt 30 and the intermediate plate 33 are shown enlarged so that details emerge better. The nut 28 with the recess 28b, the cylindrical projection 28c and the cover 28d can be produced in the deep-drawing process.

The material of the latch 30 is deliberately weakened at points 30al and 30a2 so that the left end of the latch from which the projections 30b emerge can be bent. The projections 30b then enter the recesses 33a of the intermediate plate 33. With 30c a tax hit is designated.

16 again shows the nut 28 with the domes 28a, the extension 28c and the cover 28d. Between the nut 28 and the plate 33, the bolt 30 is slidably mounted in the housing. When the bolt 30 is deformed by striking the nut 28, the projections 30b enter the recesses 33a in the intermediate plate 33 and prevent the bolt from retracting to the left.

17 shows the locking disk 25 with the tour pin channel 25a and the pin 25b.

The bolt 30 has in addition to the control curve 30a and the projections 30b

Tax slopes 30c.

The intermediate plate 33 has a recess 33d in the area of the bolts 33b, 33c, in which the slide switch 34 is mounted so as to be vertically displaceable. This slide has a surface 34a at the top which acts on the microswitch, not shown. At the 8th

Edge 34b engages pin 25b. The bolt 33b passes through the elongated hole 34c. A resilient extension 34d, together with a nose 33e, means that the slide switch 34 can assume two defined positions. A rear bolt 34e is acted upon by the control bevel 30c.

The movement sequences are as follows: When the bolt 30 is pulled back in the direction of the arrow 36, the control bevel 30c presses the bolt 34e and thus the switch slide 34 downward in the direction of the arrow 37. The microswitch attached to the bolts 33b, 33c responds and the unlocking of the cabinet can be signaled in a monitoring center.

If the bolt 30 is extended, this initially has no influence on the slide switch 34. However, if the touring pin of the bolt has left the channel 25a and the locking disk 25 folds back in the direction of the arrow 38, the pin 25b presses the slide valve 34 over the edge 30b in the direction of arrow 39 upwards. This type of control of the slide switch and microswitch has the extraordinary advantage that the signal is present along the entire bolt path, so that the warning is only given when the cabinet is securely closed and the tour pin channel is blocked.

Fig. 18 reveals in an enlarged view how the nut 28 moves the slide 31 and this moves the locking disk 25:

The cam 31a rests in the recess 28b. If the nut 28 is rotated, the slide 31 moves upward and the locking disk 25 is pivoted clockwise until its touring pin channel 25a is aligned with the channel 24c of the control disk 24.

Fig. 19 shows the interaction of the parts: nut slide, locking disc and control disc assume the locked state in which the tour pin channels are blocked.

20, the nut 28, the slide 31, the locking disk 25 and the control disk 24 are shown from above.

If the drive shaft 27 is moved in the state shown in FIG. 19, the locking disk 25 rotates clockwise. If there is no opening pulse, the electromagnets 22, 23 are de-energized, the spring 26 pulls the control disk 24 with it. The 9

Armatures 24a and 24b lift off the electromagnets, but the tour pin channels remain closed. The attempt to open ends with the touring pin of the bolt 30 abutting the pivoted control disk, the bolt only being able to be moved by millimeters.

However, when an opening pulse is present, the electromagnets 22, 23 hold the armatures 24a and 24b. The control disk 25 rotates against the force of the light spring 26 until the tour pin channel 25a coincides with the channel 24c. Now the tour pin can penetrate and the bolt can be withdrawn.

Since all torques for the control and movement processes are applied by hand and the armatures are in contact with the magnets in the idle state, no electrical lifting work is required. The magnets only have to hold the control disk against the force of the weak spring 26. The electromagnets can therefore be made very small and their power consumption is extremely low.

Commercial usability

The described embodiments of security locks are ideally suited to be used in large numbers in security lockers, the operating state of which is monitored at a central point by security personnel. However, they can also be used very well individually in safes or safes.

The release pulse can be entered either using a keyboard or a card reader.

If the lockers have additional keyholes, it is common for security personnel to trigger the opening impulse at the central control panel. In order to be able to use the new electromagnetic control of a bolt for locking locks, a few modifications are required: The heavy bolt, which is moved by the drive nut and handle, becomes a light auxiliary bolt that carries a long, powerful mandrel. This Do protrudes into the housing of another key or combination lock in such a way that both bolts are mechanically coupled. The main bolt drives the auxiliary bolt and this moves the locking disc and the control disc via a cross slide. If a magnet of the locking lock is energized, the tour pin channels of the disks mentioned come into the open position and the tour pin of the auxiliary bolt can penetrate. 10

As long as the lock does not receive an opening impulse, one with main and

Locker equipped cabinet can not be opened.

Such lock combinations are common in safe deposit systems and in cabinets of a higher security level, which may only be opened by two authorized persons.

1 1

Reference list

1 housing la Lagerdom lb bearing bush lc Do

Lock washer a tour pin channel b, 2c arms d, 2e pins

Control disc a tour pin channel

Drive nut a arbor b control surface c secant

Slider a thorn

feather

Bolt a control curve b bolt head c web d locking edge

Leg spring

Lock cover a bearing bush 0 drive shaft 1 base plate 1a pin 2 spring 3, 14 electromagnets 12 a, 14a anchor

Slider a control surface b spring

Retaining pins, 18 arrows

Relocking element a cuboid projection

feather

Housing a breakthrough b bearing pin, 23 electromagnets

Control disc a, 24b anchor c touring pin channel

Lock washer a Tour pin channel b pin

Tension spring

drive shaft

Nut a Mandrels b Recess c cylindrical neck d cover

Dome disk a dome b pairs of holes

Bolt a control curve b projections 1 3

c Tax amounts

Slider a cam b toothing

feather

Intermediate plate a recesses b, 33c bolt d recess e nose

Switch slide a surface b edge c slot d extension e bolt

Castle ceiling a predetermined breaking line ,, 37, 38, 39 arrows

Claims

14 Claims

1. Electromagnetically controllable security lock, in particular for security containers, with a bolt having a touring pin and an electromagnet acting as a holding magnet which blocks or releases the retraction of the bolt via control and blocking elements, characterized in that the drive nut or the bolt has a toothing Moves slide (5), which takes along a locking disc (2) provided with a tour pin channel (2a), that this locking disc (2) is offset by a spring (12) with one

Tour pin channel (3a) having control disc (3) is coupled and that this control disc (3) carries an armature (13a) which is held by the electromagnet (13) when energized, whereby both channels are aligned with the lock axis (AB) and the tour pin can happen with the bolt (7).

2. Security lock according to claim 1, characterized in that the bolt (7) is designed as a locking bolt which is moved by a handle via a drive nut (4).

3. Security lock according to claim 1, characterized in that the bolt is designed as an auxiliary bolt which carries a drive pin and that the lock housing is connected to a main lock, in the bolt of which

Drive pin protrudes.

4. Security lock according to claim 1, characterized in that the control disc (3) carries a second armature (14a) which is opposed by a second electromagnet (14) in the housing (1).

5. Security lock according to claim 1, characterized by such a design of the bolt control curve (7a) that the required advance angle of the drive nut (4) does not trigger any bolt movement. T5

6. Security lock according to claim 1, characterized in that a cavity is provided below the housing base, which receives the electronics and which is completed by a second housing base (1 1).

7. Security lock according to claim 1 and following, characterized. that in the housing for actuating a microswitch a slide switch (15) is mounted, which is pressed down by a web (7c) when the bolt (7) is retracted and is raised by the drive nut (4) when the bolt (7) is extended.

8. Security lock according to claim 1 and following, characterized in that a relocking element (19) is arranged between the lock cover (9) and the base plate (1 1), which when the base plate (11) is knocked away via a projection (19a) and a locking edge (7d) blocks the bolt.

9. Security lock according to claim 1 and following, characterized in that a drive shaft (27) is immersed in the cylindrical extension (28c) of a nut (28), that this extension (28c) is provided with a cover (28d) via a predetermined breaking point and that this cover (28d) breaks off when an attempt is made to remove the lock by striking the drive shaft.

10. Security lock according to claim 9, characterized in that the bolt (30) to achieve a relocking function in the area of the control recess (30a) has weak points (30al, 30a2) which yield when the drive shaft (27) is impacted, whereby projections ( 30b) of the bolt (30) in recesses (33a) of an intermediate plate (33) and thus mechanically block the bolt (30).

11. Security lock according to claim 9, characterized in that the lock cover (35) has a predetermined breaking line (35a) which breaks open in the event of impacts on the drive shaft (27), allows the shaft (27) to pass through and thus prevents the lock from being knocked away . 1 6

12. Security lock according to claim 9, characterized in that for actuating a microswitch a slide switch (34) is provided, which is mounted on an intermediate plate (33) in such a way that it activates via a control slope (30c) when the bolt (30) is withdrawn and is only reset by a pin (25b) of the locking disc (25) when the bolt (30) is fully extended again.