EP0621384B1 - Key and cylinder for a safety lock - Google Patents

Abstract

The key has, in the shank, a continuous bore (8), in which two opposed control elements (9, 10) are mounted, these elements being movable inwards counter to the restoring force of a compression spring (12) arranged in the bore (8). When the key is inserted into a keyway (2) of the rotary lock cylinder, an additional tumbler (15) is raised by one control element (10), this tumbler engaging radially into a recess (6a) of the stator (3). In the case of a key without a control element (10), the rotor is blocked by the tumbler (15). When a key (2) according to the invention is used, the rotor (1) can be rotated, the tumbler (15) being lifted out of the recess (6a) and the control element (10) being moved radially inwards. After a rotation through, for example, 90@, a counterbolt (16) of the stator (3) is put in place by the tumbler (15). Here too, if the control element (10) is absent, the rotor (1) is blocked by the counterbolt (16). <IMAGE>

Description

The invention relates to a key and rotary lock cylinder according to the preamble of independent claim 1 and a key for a rotary lock cylinder with an additional one Tumbler.

Keys of this type have the advantage that they are due of the control element arranged in the shaft is hardly unauthorized can be copied and thus with such keys equipped locking systems have a higher security value have. The so far known keys of this Genus, also called "mechanical keys", are however still has various disadvantages, so that despite the very high copy security these keys, especially as Reversible key, have not yet been widely used.

DE-A-35 17 660 is a key of this type became known in the key channel of a rotary lock cylinder is insertable and one in its flat shaft Movable device with an additional tumbler is movable into the release state. The moveable Setup of the key consists of a protruding one Pen that slides in a blind hole of the key is held. A spring is also arranged in the blind bore, which pushes the pin outwards, the falling out of the pin by gradations in the blind bore of the Shank and on the pin is prevented. Protruding pins are generally disadvantageous for a key because the key hangs easily on the pin.

Another key is this through US-A-4,667,495 Genus became known for the classification of the additional Tumbler in the shaft has a limited displaceable pin. When inserting the shaft into the key channel the pin drives onto a ramp arranged in the rotor, which the pin moves radially and this the additional Tumbler classifies. So that the ramp when inserting of the shaft can reach the pin, there are grooves on the shaft or other recesses required in a Flat key available for control drilling Limit area. In practice, therefore, the pen must be as possible be placed near the front end of the shaft.

The loosely slidable pin usually stands with one end on the shaft in front so that the key can hook in here too.

The generic FR-A-1 036 572 discloses a rotary lock cylinder with a key that has a cross section has a round shaft in which a pin is slidably mounted is for positioning a slide mounted in the rotor from an additional guard locking of the rotor when rotating the rotor is moved. The slide arranges a counter bolt of the housing. The rotor stops when the rotor is turned further additional tumbler the slide against a spring force in the offset position.

A key and rotary lock cylinder of this type is also available become known by the generic EP-A-0 472 495. The Additional guard locking is provided by a key shaft categorized slidably mounted pin, the outside is flush with a narrow side of the key. The verification of the control is done here with a locking element that the Shear line between stator and rotor exceeds.

The invention has for its object a key and To create rotary lock cylinder of the type mentioned on the outside of the shaft no recesses for a Rotary lock cylinder arranged ramp needed and still is easy to manufacture and has higher copy security. The object is achieved by the invention according to claim 1.

In the key according to the invention, the control element can be on the outside be exactly flush with a narrow side of the key so that such a key only upon closer inspection of such a key can be distinguished without control. Missing one copied key an appropriate control, so when inserting the key shaft into the key channel Guard locking of the rotor is moved radially outwards into the blocking position. The rotor cannot turn now and therefore the lock cannot be opened. Knows the key instead of the control element a hole in the corresponding one On the outside of the key, the guard locks the locking cylinder when this tumbler after a certain rotation of the rotor a counter bolt in Stator has reached. This counter bolt is then due to missing control element not classified and locks through an engagement in the recess of the rotor, the rotary lock cylinder.

The rotary lock cylinder is comparatively simple and therefore inexpensive to manufacture. The additional measures on the stator are comparatively simple because they are only on the inside a conical recess must be worked into the stator. The locking of the rotor can be a simple bolt be the one without spring loading in a blind bore of the rotor is guided radially.

According to a development of the invention, the stator has one Insert on which the said recess for the with the Control has cooperating tumbler. The deposit can be made of hardened steel or hard metal easily manufactured, reducing security against a violent opening of the rotary lock cylinder considerably is improved. Other advantageous features result resulting from the other dependent claims, the following Description as well as the drawing.

Fig. 1

ein Querschnitt durch einen erfindungsgemässen Drehschliesszylinder mit eingesetztem Schlüssel,

Fig. 2

ein Querschnitt gemäss Fig. 1, jedoch nach einer Drehung des Rotors um 90°,

Fig. 3

ein Schnitt gemäss Fig. 2, jedoch mit einem Schlüssel ohne Steuerelement,

Fig. 4a und 4b

eine Ansicht bzw. ein Querschnitt durch eine Einlage,

Fig. 5a und 5b

eine Ansicht bzw. ein Schnitt durch ein Statorgehäuse,

Fig. 6a und 6b

Ansichten eines Rotors, und

Fig. 7a und 7b

eine Teilansicht bzw. ein Schnitt durch einen erfindungsgemässen Schlüssel.

An embodiment of the invention is explained below with reference to the drawing. Show it:

Fig. 1

2 shows a cross section through a rotary lock cylinder according to the invention with a key inserted,

Fig. 2

2 shows a cross section according to FIG. 1, but after the rotor has been rotated through 90 °,

Fig. 3

2, but with a key without a control element,

4a and 4b

a view or a cross section through an insert,

5a and 5b

a view or a section through a stator housing,

6a and 6b

Views of a rotor, and

7a and 7b

a partial view or a section through an inventive key.

1 shows a stator 3 with a conventional steel sleeve 4 and a housing 5, in which a rotor 1 is rotatably mounted is. With one inserted in a key channel 2 of the rotor 1 Keys 7 are not shown here, common tumblers classified, the rotor 1 for actuating a lock not shown here can be rotated. For Key 7 shows the classification of these usual tumblers appropriate blind holes. The key 7 can, however also be a so-called wrench, in which case the rotary lock cylinder adjusted accordingly, of course is.

5a and 5b show, the housing 5 of the stator 3 be made from fins 30 soldered together. The fins 30 are preferably made of hardened steel. At the rear end of the housing 5 is a part-circular in the upper region Recess 29 provided in which an arcuate Insert 6 made of preferably hardened steel or hard metal is. The insert 6 has a conical blind bore 6a on, which cooperates with a tumbler 15 of the rotor 1. The housing 5 also has longitudinal channels 25 into which known slider 19 are used, in which housing pins 16 are guided with their springs 20 in bores 31. Such slide 19 are known per se.

The rotor 1 is provided with a radial bore 28, in which inserted a sleeve 13 with a through hole 14 is. In the preferably made of hardened steel Bushing 13 is a tumbler 15 in the form of a cylindrical bolt guided radially. The radial outer end of the tumbler 15 has a conical surface 15a, which correspond to the bore 6a of the insert 6 is. A cylindrical arranged at the other end of the tumbler 15 Part 15c protrudes through or into opening 14 of the sleeve 13. As FIG. 1 shows, one is in the key channel 2 introduced key 7 the tumbler 15 by a control 10 pressed radially outwards against the insert 6.

The key 7 preferably has two control elements 9 and 10 on that in a continuous stepped bore 8 on the front End of the key shaft and are used with a common compression spring 12 in the positions shown in Fig. 1 are held. The two control elements 9 and 10 are cylindrical Pins with one radially protruding outwards Flange 9a or 10a. The flange 9a lies on a shoulder 8a of the stepped bore 8, thereby preventing the control element 9 at the outer end from the stepped bore 8 can emerge. The flange 10a of the control element 10 lies accordingly on a sleeve 11, which with a press fit in the stepped bore 8 is inserted. As can be seen, they are Control surfaces 9b and 10b of the elements 9 and 10 in the in FIG. 1 shown positions exactly flush with the narrow sides 7a the key 7. The mechanical control device with Elements 9 and 10 and the compression spring 12 is comparative easy to manufacture and reliable.

The controls 9 and 10 can against the retroactive Force of the compression spring 12 limits inward into the stepped bore 8 are moved. The purpose of this agility is from the following functional description.

To actuate the rotary lock cylinder, the shaft of the Key 7 inserted into the key channel 2 as usual. Here are through the usual holes in the key classified the usual tumblers not shown here. In the arrangement shown in Fig. 1, the tumbler is also 15 raised by the control element 10 so that it is in the recess 6a of the insert 6 engages. When turned The key would then be the control element 9, which would raise the tumbler 5 accordingly. Because now the tumbler 15 and the control against the retroactive Force of the compression spring 12 can be moved inwards despite the engagement of the tumbler 15 in the recess 6a of the rotor 1 can be turned with the key, for example in Fig. 1 counterclockwise. Of course, this is only then possible if the recess 6a and accordingly the surface 15a are conical. Moved when turning rotor 1 the tumbler 15 extends radially inwards to a level End face 15b the shear line 27 between the rotor 1 and the stator 3 has reached.

Now try to turn the lock cylinder with a key to operate without a movable control element, so will with a classification of the usual tumbler 1 by the tumbler 15 locked because this tumbler 15 on the shaft of the key and do not move radially inwards can. Are now the insert 6, the tumbler 15 and the sleeve 13 made of hard material, such as hardened steel, see above it is also not possible to turn the rotor 1 by force. When using high forces, only the handle of the Turned off the key.

Has a key 24 according to FIG. 3 instead of a control element 9 and 10 a bore 33 at the corresponding position on, the tumbler 15 is not in engagement with the insert 6 and accordingly, the rotor can be classified according to the rest Tumblers are temporarily turned. After a turn of rotor 1 by 90 ° clockwise or counterclockwise, in this case, however, the counter bolt 16 falls inside the sleeve 13 and locks the rotary lock cylinder. The rotor 1 cannot be turned into position in this case in which the lock is unlocked. Is an inventive and key provided for the rotary lock cylinder 7 used, the counter pin 16 is by the tumbler 15 classified and the rotor can thus be more than 90 ° to the position in which the lock unlocks is. So that the tumbler 15 classify the counter pin 16 can, the compression spring 12 is formed stronger than the compression spring 20, which the counter pin 16 radially inwards presses. As usual, the counter pin 16 has a conical bore 22, which corresponds to the surface 15a the tumbler 15 is formed. The opposite one Counter bolt 17 with the bore 23 and the compression spring 21 performs the exact same function. 2 is clear shown as the counter bolt 16 by the tumbler 15 arranged at a corresponding rotational position of the rotor 1 becomes. If the rotor 1 continues to rotate from this position, For example, counterclockwise, the guard locking will give way 15 in turn radially inwards, correspondingly also the control element 10 against the retroactive force of the compression spring 12 is moved radially inwards. As can be seen the rotary lock cylinder with an associated and according to the invention Key 7 can be operated as usual. At a However, a key with a missing control is an actuation not possible even when using high forces.

Claims (9)

1. Key and cylinder for a safety lock, the cylinder having a rotor (1), a stator (3) and a plurality of tumblers and the key (7) is provided with at least one control element (9, 10) which is arranged in the shank of the key (7), has a control face (9b, 10b) which is flush with an outer side (7a) of the key (7) and interacts with an additional tumbler (15) of the rotor (1), the control element (9, 10) being radially displaceable counter to the restoring force, for example of a compression spring (12), the stator (3) having, on the inner side, a recess (6a) in which the additional tumbler (15) of the rotor (1) engages due to the action of the control element (9, 10), and when the rotor (1) is turned, it being possible for the additional tumbler (15) to be moved radially inwards counter to the restoring force, and a counter-bolt (16) being arranged with spacing from the recess (6a), characterized in that the additional tumbler (15) has a conical control face (15a) and, in the case of a corresponding turned position of the rotor (1), the control element (9, 10) is held by the said restoring force in a position in which its control face (9b, 10b) is flush with a narrow side (7a) of the key (7) and the conical control face (15a) of the additional tumbler (15) interacts with a conical bore (22) of the counter-bolt (16) in order to position the latter.
2. Key and cylinder according to Claim 1, characterized in that an insert (6) is inserted into a recess (29) of the stator (3), which insert has the recess (6a) which interacts with the additional tumbler (15).
3. Key and cylinder according to Claim 2, characterized in that the insert (6) consists of hardened steel or hard metal.
4. Key and cylinder according to Claim 3, characterized in that the insert is of curved design.
5. Key and cylinder according to one of Claims 1 to 4, characterized in that the recess (6a) is a conical bore.
6. Key and cylinder according to one of Claims 1 to 5, characterized in that the additional tumbler (15) is a bolt which is guided displaceably in a bush (13).
7. Key and cylinder according to one of Claims 1 to 6, characterized in that the shank of the key (7) has a continuous stepped bore (8) into which a compression spring (12) is inserted, which acts upon two mutually opposite control elements (9, 10).
8. Key and cylinder according to Claim 7, characterized in that a casing (11) is pressed into the stepped bore (8), in which casing a control element (10) is guided.
9. Key and cylinder according to Claim 8, characterized in that the control elements (9, 10) each have, at the inner end, a flange (9a, 10a) which rests against a shoulder (8a) or the casing (11).

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