DE102009039502A1 - flat key - Google Patents

Abstract

The invention relates to a flat key, in particular a reversible key for cylinder locks, with a copy-protected flat profile body which has a predetermined structured cross-sectional area. Furthermore, on the longitudinal broad and / or longitudinal narrow sides of the flat profile body there are grooves and / or countersunk sections for coding, the grooves extending parallel to one another and forming the profile of the key. According to the invention, the flat profile body has on its longitudinal broad side at least one rib running parallel to the grooves and protruding over the respective surface of the profile body, an additional coding option being created over the length of the rib and / or its position in relation to selected depression sections.

Description

The invention relates to a flat key, in particular reversible key for cylinder locks, with a copy-secured flat profile body, which has a predetermined, structured cross-sectional area, further on the longitudinal and / or longitudinal narrow sides of the flat profile body grooves and / or countersinking sections for coding, wherein the grooves parallel to each other extend and form the profiling of the key, according to the preamble of claim 1.

From the DE 297 18 647 U1 is a flat key for cylinder locks previously known, the key is inserted there vertically and correspondingly arranged vertically milled. During the exact insertion of the key into the keyway shaped according to the key profile, pins of different lengths, corresponding to the milling depth, are pressed into a plane and release the parting line. This ensures that the profile core can be rotated in the housing with a matching key. Decisive for the exact functioning of this process is the correct coordination between the milling in the key and the length of the corresponding core pin. The key itself contains the so-called key code with its milled-in grooves. To prevent copying on normal copy milling machines is after DE 297 18 647 U1 has been suggested that the flat key axially symmetrical to the key shank milled in accordance with the predetermined code and wherein additionally a drilled notch is arranged.

In the copy-protected profile flat key for cylinder locks according to DE 10 2006 002 726 A1 is also assumed by profiled vertical or horizontal keyway and milled according to a given code and a longitudinal profiling. The local key has a key back, which in the profile area at least partially and perpendicular to the key longitudinal axis extending recesses. The sequence of recesses resulting from top view leads to a remaining web-like back whose shape can be approximated by a sine function. With the key after DE 10 2006 002 726 A1 should be given a higher security against copying or unauthorized opening of the lock. The code variance can be achieved by shifting the sine function on the back of the key, ie by changing the spatial position, by changing the amplitude and / or the frequency of the function representation. As an additional code function, the depth of the recesses can be changed in the direction perpendicular to the key longitudinal axis.

From the EP 1 106 756 B1 is a flat key with cylinder lock previously known. In this prior art system, a large number of coding possibilities without modification of the structure of the cylinder core is provided, at the same time the mechanical resistance of the key is increased. In one embodiment according to EP 1 106 756 B1 the key has a third engagement means, which is formed as a survey, which is located laterally on a surface of the key. The survey may extend over a portion of the length or the overall length of the key. Using the previously known from the prior art survey an additional locking member can be actuated to preclude unauthorized opening of an associated lock.

From the foregoing, it is therefore an object of the invention to provide a further developed flat key, in particular reversible key for cylinder locks, with a copy-secured flat profile body, which has additional coding options, so that its use can be done in locking systems with defined access authorization. Furthermore, the coding security is to be improved by the structure of the flat key without the dimensions of the key being subject to enlargement.

The object of the invention is achieved by the combination of features according to claim 1, wherein the dependent claims represent at least expedient refinements and developments.

It is therefore assumed that a flat key, in particular reversible key for cylinder locks, with a copy-secured flat profile body, wherein the flat profile body has a predetermined structured cross-sectional area.

Furthermore, located on the longitudinal and / or longitudinal narrow sides of the flat profile body grooves and / or countersinking sections, z. B. executed as taps for coding, wherein the grooves extend parallel to each other and form the profiling of the key.

The flat profile body according to the invention has on its longitudinal broad side over at least one parallel to the grooves extending over the respective surface of the profile body protruding rib.

According to the invention, a supplementary coding option is provided over the length of the rib and / or its position relative to selected subsidence sections.

According to the invention, the rib forms an upper, first coding plane. Foreseen first Countersinks in a surface free of the rib form a second, middle coding plane. Provided second subsidence with a depth greater than that of the first reductions represent a third coding level, each of which can be scanned by associated pins or pin pairs in the cylinder lock.

With regard to the formation of the Abtaststiftpaare be on the solution EP 1 106 756 B1 Reference is hereby made in full to the disclosure of the present invention with reference to the scanning mechanisms.

In one embodiment of the invention, the protruding rib extends in the longitudinal direction of the flat profile body at a distance from the Schlüsseleinführkante to a portion of the countersinking sections, wherein in the section between the leading edge and starting rib a space for additional coding means, in particular an additional longitudinal profiling is provided.

Furthermore, according to the invention, a further groove for forming a side profile is present in at least one of the longitudinal narrow sides of the flat profile body.

In terms of design, the respective first and respectively second counterbores on the front and rear side of the flat profile body are designed to overlap in depth, but while maintaining a laterally predetermined minimum distance to obtain the necessary stability of the key. If the respective counterbore is over-drilled during unauthorized copy milling, the key can not fulfill its function, which represents an additional safety aspect.

The free space for rib beginning on the flat profile body can be formed as an inclined surface, wherein over the length and / or the angle of rise of the inclined surface a likewise complementary, further coding possibilities creating measure is formed.

The structure of the cross-sectional area at least in the region of the insertion edge of the key can consist of a stylized letter and / or number sequence or correspond to such a sequence.

The protruding over the respective surface of the profile body rib is located on a free per se and planar surface portion, which thus provides space for the formation of the first and second or further subsidence available.

In the key blank, the protruding, raised rib is present over the entire length of the beard and is shortened or removed depending on further processing and coding.

Moreover, according to the invention a key-lock combination using the presented flat key for locking systems and locking systems.

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

Hereby show:

1 a perspective view of a still largely unprocessed key blank with raised rib and two exemplary longitudinal grooves in the flat profile body;

2 a perspective view similar to that after 1 but with already shortened rib and executed countersinks of different depths for coding the key;

3 an embodiment of a key with complete customization and coding, wherein additionally in one of the side surfaces existing additional groove and the groove in the former free space in front of the raised, protruding rib is formed;

4a to c various examples of coding possibilities by arrangement and length extension of the rib and the choice of the positions of the depressions, which are adjacent to the rib on the flat profile body of the key, and

5 Top view and sectional view of an inventively realized key with recognizable position and depth of the cuts.

The key according to the figures is based on a conventional, known in principle flat key or reversible key, which is a handle 1 and a key-beard 2 having.

The key bit 2 includes a flat profile body extending over a predetermined length.

In the flat profile body are grooves 3 located. The cross section of the flat profile body has a specific structure, which preferably corresponds approximately to a letter or number sequence.

On a surface plane 4 of the flat profile body is the invention, parallel to the grooves 3 extending, over the surface of the profile body protruding rib 5 , The rib has in the example shown a slightly trapezoidal cross-sectional area, but can also be a Deviating cross-sectional shape in the sense z. B. have a rectangular profile.

On the key blank, the rib extends 5 over the entire section of the longitudinal extent of the flat profile body.

On the insertion side, the flat profile body has insertion bevels 6 for easier handling of the key.

In the already partially processed form according to figurative representation 2 are prior art countersink sections 7 for coding the key available and there are in at least one of the longitudinal narrow sides countersunk holes 8th introduced, which also serve the coding.

The protruding rib 5 is already shortened for the purpose of coding on a defined longitudinal and it is the first inventions according to the invention 9 and the second inventive reductions 10 with greater depth relative to the subsidence 9 realized.

Exemplary coding possibilities with regard to the length of the rib 5 and their position relative to the subsidence 9 and 10 are in the 4a to c, to which reference is made.

The 3 shows a perspective view of the key according to the invention with complete coding. In addition to the subsidence 9 and 10 as well as the rib 5 is still a complementary profiling groove 11 in the longitudinal narrow side of the flat profile body in the region of the countersunk holes 8th executed. Another coding option is the short groove 12 given, extending from the leading edge 13 of the key until the beginning of the rib 5 extends in existing free space there.

As the representations after the 4a until c can be taken is about the length of the rib 5 and whose position on the beard forms a Kodiermöglichkeit, which contributes to increase the security when using appropriate locking systems with such keys. In addition, there is a coding variant therein, the first and second reduction 9 ; 10 in different positions relative to the place of the rib 5 train. 4a shows a representation, wherein the first and second reductions in the direction of the leading edge 13 of the key, ie in front of the rib 5 are located.

In the presentation after 4b is the first reduction 9 in front of the raised rib and the second sinking 10 behind the raised rib, each from the leading edge 13 Seen from, located.

In the presentation after 4c is both the first and second subsidence 9 ; 10 behind the raised rib 5 looking from the leading edge 13 out.

Alternatively, the first and second subsidence 9 ; 10 also directly in the area of the longitudinal extent of the rib 5 are so that in this respect a high proportion of variation and thus Kodiermöglichkeiten results.

5 shows a plan view of an inventively realized key with first and second reduction 9 ; 10 , the additional short groove 12 , raised rib 5 and known longitudinal grooves 3 as well as countersinking and milling sections 7 that extend across the key bit in a different width and depth.

The sectional view taken along the line A-A makes the depth position associated with reductions on the front and back of the flat profile body clearly, with X is to be observed minimum distance to ensure the necessary mechanical stability.

The first reduction 9 can be realized as a stepped bore, to form both a locking plane and a coding plane for corresponding pins or pairs of pins, which according to the teaching EP 1 106 756 B1 are executed.

LIST OF REFERENCE NUMBERS

1

handle

2

bit

3

groove

4

surface plane

5

rib

6

chamfer

7

countersink portion

8th

lateral countersink hole

9

first reduction

10

second reduction

11

profile groove

12

short groove

13

lead-in

X

distance

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 29718647 U1 [0002, 0002]
• DE 102006002726 A1 [0003, 0003]
• EP 1106756 B1 [0004, 0004, 0012, 0043]

Claims (10)

Flat key, in particular reversible key for cylinder locks, with a copy-secured flat profile body, which has a predetermined structured cross-sectional area, further on the Längsbreit- and / or longitudinal narrow sides of the flat profile body grooves and / or countersink sections for coding, wherein the grooves extend parallel to each other and the profiling of the Make key, characterized in that the flat profile body has on its longitudinal broad side over at least one parallel to the grooves extending over the respective surface of the profile body protruding rib, over the length of the rib and / or their position to selected subsidence sections a complementary coding possibility is created , Flat key according to claim 1, characterized in that the rib has an upper, first coding plane, provided first depressions in a surface free of the rib, a second, middle coding plane and provided second depressions having a depth greater than that of the first depressions in the rib free surface form a third coding level, which are each scanned by associated pins in the cylinder lock. Flat key according to claim 1 or 2, characterized in that the protruding rib extends in the longitudinal direction of the flat profile body at a distance from the Schlüsseleinführkante to a portion of the countersinking sections, wherein in the section between the leading edge and starting rib a space for additional Längsnutprofilierung is created , Flat key according to one of the preceding claims, characterized in that in at least one of the longitudinal narrow sides of the flat profile body, a groove is formed to form a side profile. Flat key according to one of claims 2 to 4, characterized in that the respective first and second depressions overlap in depth on the front and rear side of the flat profile body, but laterally comply with a predetermined minimum distance from one another or from one another. Flat key according to claim 3, characterized in that the free space is formed at the beginning of the rib as an inclined surface, wherein the length and / or the angle of rise of the inclined surface bidet an additional coding. Flat key according to one of the preceding claims, characterized in that the structure of the cross-sectional areas corresponds to a stylized letter and / or number sequence. Flat key according to one of the preceding claims, characterized in that the protruding over the respective surface of the profile body rib is located on a flat surface portion. Flat key according to one of the preceding claims, characterized in that the projecting, raised rib extends over the entire length of the beard in the key blank. Key-lock combination using a flat key according to one of the preceding claims.

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