EP0911465A2 - Flat key for cylinder lock - Google Patents

Abstract

The key portions (1,2,4-6) are milled away to a predetermined code, and a drilled notch (3) is also formed in the key.

Description

The invention relates to a flat key for cylinder locks, which cannot be copied with the previous methods is and refers to conventional systems from Cylinder locks with a profiled vertical key channel.

With these systems, the key is inserted vertically and has corresponding vertical mills. By inserting the key correctly - Locking element - in the according to the key profile shaped key channels are of different lengths pins designed in accordance with the milling depth pressed a level and release a dividing line. This ensures that the profile core in the housing can be rotated. Crucial for the functioning this process is the right match between Milling in the key and the length of the corresponding Core pin.

The key contains with its symmetrically inserted Milling a so-called code.

Conventional copying methods for this type of cylinder system are based on the fact that the corresponding Code with the help of scanning - mechanical or optical - or with the help of registered code numbers - with computer-controlled Copy milling machines - axially on one is transferred to the milling cutter moving the key shaft.

This milling cutter transfers the corresponding millings congruent on the duplicate key to be produced. Basically, all geometrical shapes of the millings are copied based on the Milling process used in the production of the original key were used. Thus, in practice in the presence of a key blank with appropriate key profiles with conventional ones Copy milling machines all keys of the aforementioned Systems are copied.

According to DOS 2 632 172 and 2 517 689 are cylinder locks known whose design features reversible key condition, whose wide insertion surfaces are stanchions exhibit. Locking pins engage in these holes of the rotor in the cylinder housing and operate the lock when the key is turned. These keys are by known methods copyable.

In DE-PS 44 20 015 C 1 is a cylinder flat key known that instead of milled grooves notches has, in which tumbler elements in the form of Pins located in the cylinder core of the lock intervene and set the lock in motion. With that higher copy security can be achieved with it it is necessary that the geometry of the bore with the The geometry of the locking elements must match got to.

The invention has for its object a flat key for cylinder locks to develop the with the conventional methods using copy milling machines cannot be copied.

This is according to the invention by the characterizing Part of the claim solved.

The invention is described below using an exemplary embodiment shown.

Fig. 1

Seitenansicht des Zylinderschlüssels ohne Griff

Fig. 2

Draufsicht nach Fig. 1

Fig. 3

Schnitt nach Fig. 1

The drawing shows:

Fig. 1

Side view of the cylinder key without a handle

Fig. 2

Top view according to FIG. 1

Fig. 3

Section according to FIG. 1

In Figure 1 is the side view of the flat key shown for cylinder locks without handle, in which Routings 1 symmetrical to the key shank 1, 2, 4, 5, 6 arranged according to the predetermined code are. As can be seen from FIGS. 1 to 3, the Flat key in addition to the symmetrical milling 1, 2, 4, 5, 6 instead of a milled one drilled notch 3, whose on the top edge of the Key hole is arranged so that them between the asymmetrical profile grooves 7 that on lie on both sides of the key shaft.

The base of the bore of the notch 3 corresponds to the Depth of the original milled not executed Score. In connection with the profile grooves 7 arise side walls 3a and 3b of different heights. In the lock cylinder there are no changes themselves.

This principle also allows the attachment of several such notches 3 instead of symmetrical cutouts.

The geometric shape of the bore of the notch 3 is so designed. that a trouble moving the tumbler elements during the axial movement of the key is possible.

With these two different configurations of the drilled notch 3 and milled 1, 2, 4, 5, 6 of Flat key to insert the corresponding one Codes is achieved by copying the key with the help of the copying technology commonly used in practice cannot be done. Scanning while copying is done optically or mechanically. Connected with that that the highest point that the scanning system registered, transmitted.

Based on this embodiment, it is for Key cutting machines, the vertical milling cannot manufacture or copy wells, not possible, the geometric shape necessary for closing transferred to.

Due to the different heights of the side walls 3a and 3b of the holes is a copy of the key much more difficult.

This ensures that a flat key with this Combination of millings 1, 2, 4, 5, 6 and drilled 3 notch an effective protection against unauthorized Represents copying keys.

From this it follows that for copying the Key, especially the hole, a special one Copying technology is needed. Only with this special one Copying technology is precise positioning and geometric Design of the bore, based on the constructive Design of the cylinder lock, possible.

Copying can only be done using a special Copying technology with appropriate tools.

List of the reference symbols used

1,2,4,5,6

Milling

3rd

drilled notch

3a

Side wall height of the notch 3

3b

Side wall height of the notch 3

7

Profile grooves

Claims (1)

Flat key for cylinder locks for conventional systems of cylinder locks with a profiled vertical key channel, which cannot be copied using conventional methods and which has symmetrical milled grooves, characterized in that
that this has axially symmetrical milled grooves (1, 2, 4, 5, 6) according to the given code and in which instead of a milled hole independent of the lock cylinder of the lock notch (3) is arranged so that it is between the asymmetrical profile grooves (7), which lie on both sides of the key shaft, have different side wall heights (3a and 3b).

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