WO2007082580A1

WO2007082580A1 - Copy-proof profiled flat key for cylinder locks

Info

Publication number: WO2007082580A1
Application number: PCT/EP2006/012277
Authority: WO
Inventors: Michael Riesel; Frank Grunert
Original assignee: Iseo Serrature S.P.A.
Priority date: 2006-01-19
Filing date: 2006-12-20
Publication date: 2007-07-26
Also published as: DE102006002726A1; EP1979563A1

Abstract

The invention relates to a copy-proof profiled flat key for cylinder locks with a profiled vertical or horizontal key channel and milled portions corresponding to a predetermined code, and also comprising a longitudinal profiled structure. According to the invention, the back of the key has recesses running at least in some sections in the profiled region and perpendicularly with respect to the longitudinal axis of the key, wherein the sequence of recesses arising in plan view results in a remaining, web-like back, the shape of which can be approximated by a sinusoidal function.

Description

COPY-PROTECTED PROFILE FLAT WRENCH FOR CYLINDER LOCKS

description

The invention relates to a copy-protected profile flat key for cylinder locks with profiled vertical or horizontal key channel and milled according to a predetermined code according to the preamble of claim 1 and a key-lock combination according to claim 7.

From the German utility model DE 297 18 647 a flat key for cylinder locks is already known, which is not copyable with hitherto known methods. In the system according to DE 297 18 647 Ul the key is inserted vertically and has correspondingly vertically arranged milled grooves. By the exact insertion of the key in the keyway shaped according to the keyway different lengths corresponding to the Einfräsungstiefe designed pins are pressed into a plane and release a dividing line. In this way it is ensured that the profile core can be rotated in the housing. Decisive for the exact functioning of this process is the correct coordination between milling in the key and the length of the corresponding core pin. The key itself contains the so-called code with its milled-in grooves. In order to prevent copying on normal Kopierfräsmaschinen, has been proposed to DE 297 18 647 that the flat key has axially symmetrical to the key shank milled according to the predetermined code and in addition a drilled notch is arranged.

With the flat key design described above, the copy protection and the security of the key lock system can be improved compared to the prior art known there, but there is a risk that with not inconsiderable production costs by means of combined milling drilling devices Nachschlüssel can be made. The prior art also includes flat profile key for cylinder locks, where additionally in the profile area of the flat key before executing the notches or grooves for the code and the longitudinal profile at least one permanent magnetic section is used, the position of the permanent magnetic section on the longitudinal axis of the key profile in such a way it is chosen that remain in the formation of notches or milling lateral stabilization notch flanks. In at least one hole complementary to the magnetic portion for a core pin is in these solutions of the prior art, a ferromagnetic part pin is located, which adjoins at least one profile cylinder bottom extending into non-ferromagnetic further part pin, under the action of the permanent magnetic portion of an imported, suitable flat key the ferromagnetic part pin can be moved into a release position. With such a solution using magnetic elements, the copy security is increased, however, the technological effort for the insertion of permanent magnetic sections in the key must be considered as significant.

From the foregoing, it is therefore an object of the invention to provide an advanced, especially copy-protected profile flat key for known cylinder locks with profiled vertical or horizontal key channel and a corresponding key-lock combination, which has a higher security against copying or unauthorized opening of the castle ,

The object of the invention is achieved with regard to the profile flat key with the combination of features according to claim 1, wherein reference is made to the teaching of claim 7 with respect to the key-lock combination.

The subclaims represent at least expedient refinements and developments of the invention.

According to the invention, the basic idea of the solution presented is that the key back of a profile flat key in his profile area has recesses extending at least in sections and perpendicular to the key longitudinal axis, the sequence of recesses resulting from top view resulting in a remaining web-like back, the shape of which is approximated by a sinusoidal function.

Such an additional coding option makes it difficult for a copy of the key even if a template and ensures the other a higher security against unauthorized unlocking a complementary cylinder lock.

The code variance can be determined by shifting the sine function on the back of the key, i. by changing the spatial position, by changing the amplitude and / or the frequency.

As an additional code function, the depth of the recesses in the direction perpendicular to the key longitudinal axis can be changed.

Another way to obtain a variety of different codes is to stretch or compress and / or change the period of the sine function.

The recesses in the key back are preferably realized as a circular arc-shaped notches, so that keeps the manufacturing technology effort within limits.

In addition to the sine function coding, a pen coding known per se can be provided.

The key lock combination with a flat key for cylinder locks with profiled vertical or horizontal key channel, the flat key milled according to a predetermined code, starting from additional recesses in the back of the key, extending at least partially extending on the spine and extending perpendicular to the key longitudinal axis, wherein the result of the resulting recesses in plan view a remaining web-like Back results whose shape is approximated by a sine function. In the lock cylinder are then matched to these recesses additional locking elements for scanning the sine function coding located.

The invention will be explained below with reference to an embodiment and with the aid of figures.

Hereby show:

Fig. Ia to Ic pespektivische representations of embodiments of a profile flat key with sine function coding and plan views of the respective key back with recognizable variance of the code and

Fig. 2 detailed representations of different codes by changing

Amplitude or frequency of the sine function.

In the illustrations according to FIGS. 1 a to 1 c, a profile flat key 1 which is known per se is assumed, which in the example shown is suitable for insertion into a cylinder lock with a vertical key channel.

This profile flat key has on its underside 2 per se known notch-shaped milled grooves for scanning cylindrical pins and has a longitudinal profile. 3

According to the invention, recesses 4, which run at least in sections and perpendicular to the key longitudinal axis, are introduced in the key back profile region in the keys 1 shown by way of example.

The sequence of recesses 4 resulting from top view results in a web-like back 5 whose shape can be approximated by a sinusoidal function (see right-hand part of the figure according to FIGS. 1 a to 1 c). As indicated in Fig. 2, the code can be formed by changing the amplitude of the sine function in the region of the ridge-like back 5, but also by a variance of the frequency of the function.

Other options with regard to the receipt of further codes consist in the extension or compression and / or change in the period of the sine function.

As can be seen from the detailed views of Fig. 2, the recesses 4 are realized substantially circular arc or semi-cylindrical by milling.

In summary, a coding is introduced on the profile flat keys according to the invention so that this coding on the back of the key, i. the narrow side of the key, forms a sinusoid.

This sinusoid can be arranged on the spine in different places, in different lengths, with different amplitudes and / or different frequencies.

These codes are then assigned in the lock cylinder further locking elements, which either entitle the corresponding key for the operation of the respective lock cylinder or lock.

The coding according to the invention can be introduced both alone and in addition to a conventional pin coding on the key.

LIST OF REFERENCE NUMBERS

1 profile flat key

2 bottom

3 longitudinal profiling

4 recess

5 bridge-like back

Claims

claims

1. Copy-protected flat profile key for cylinder locks with profiled vertical or horizontal key channel and milled according to a predetermined code and comprising a longitudinal profiling, characterized in that the key back in the profile area at least partially and perpendicular to the key longitudinal axis extending recesses, the result the resulting at top view recesses results in a remaining web-like back, the shape of which is approximated by a sine function.

2. Key according to claim 1, characterized in that the code is formed by the displacement of the sine function on the key back, the change in amplitude and / or frequency.

3. Key according to claim 2, characterized in that the depth of the recesses in the direction perpendicular to the key longitudinal axis can be changed as an additional code function.

4. Key according to one of the preceding claims, characterized in that the code is formed by stretching or compression and / or change in the period of the sine function.

5. Key according to one of the preceding claims, characterized in that the recesses are designed as circular arc-shaped notches.

6. Key according to one of the preceding claims, characterized in that the sine function coding is provided in addition to a pen coding known per se.

7. Key lock combination with a flat key for cylinder locks with profiled vertical or horizontal key channel, wherein the flat key milled according to a predetermined code, characterized in that the key back in the profile region at least partially and perpendicular to the key longitudinal axis extending recesses, wherein the result the recesses resulting from top view results in a remaining web-like back whose shape can be approximated by a sinusoidal function, and additional tumbler elements for scanning the sinusoidal function coding are arranged in the lock cylinder.