FLAT KEY PROFILE FOR A LOCK-KEY SYSTEM

Abstract

The invention relates to a flat key profile for a lock and key system in which a key channel corresponding to the key profile is provided in the lock cylinder. In this case, the key profile of the key shank facing the key back upper profile section and a key face facing the lower profile section, wherein in the lower profile section in a side surface of the key shank a triangular, the center plane of the key shank superior, paracentric profile groove (2) provided on the opposite side surface of the key shank one above or below the opposite paracentric profile groove (2) arranged, triangular profile groove (3; 4) is provided, the arrangement of the paracentric profile groove relative to the opposite profile groove is such that an imaginary line (7), the vertical to the keychain plane from the intersection of the upper or lower leg of the paracentric profile groove with the key side surface to the opposite profile groove extends, to an imaginary line (5) extending from the intersection of the upper or lower leg of the opposite profile groove with the key side surface extends to the paracentric profile groove, a vertical distance (9).

Claims

1. Flat key profile for a lock and key system, in which a key channel corresponding to the key profile is provided in the lock cylinder, wherein the key profile of the key shank having a side facing the key back upper profile section and a key front of the facing lower profile section, that protruding notches are provided from the key face in the key-shank plane into the lower profile section, that in the lower profile section in the one side surface of the key shank a triangular, the center plane of the key shank superior, paracentric profile groove is provided, that on the opposite side surface of the key shank, a triangular profile groove is provided above or below the opposite paracentric profile groove whose profile base has a horizontal spacing to the profile base of the opposite paracentric profile groove arrangement of the paracentric profile groove relative to the opposite profile grooves is such that there is a vertical distance from an imaginary line, perpendicular to the key plane from the intersection of the upper or lower leg of the paracentric profile groove with the key side surface to the opposite profile groove, to an imaginary line, which extends from the intersection of the upper or lower leg of the opposite profile groove with the key side surface to the paracentric profile groove.

2. Flat key profile according to claim 1, whereinn the depth of individual notches extends to the bottom of the lowermost, the key-breast-facing (front facing) profile groove.

3. Flat key profile according to claim 1, wherein the profile grooves have a radius in the profile base.

4. Flat key according to claim 1, wherein the angle a between the legs of the parcentric profile groove (2) and the key side surface is 110.

5. Flat key according to claim 1, wherein the angle b between the leg of the opposite profile groove and the key side surface is variable and 130b100.

6. Flat key profile according to claim 1, wherein the horizontal distance is at most 0.3 mm and the vertical overlap is at least 0.2 mm.

7. Flat key profile according to claim 1, wherein the paracentric triangular-shaped profile groove has at least one shoulder in the upper leg, to which a shoulder in the lower leg of the opposite upper triangular profile groove is assigned, or in the lower leg a shoulder in the upper leg of the opposite lower triangular profile groove is assigned, wherein the paragraph begins at an imaginary intersection of the triangular profile groove with the key outer surface and has a minimum depth of of the triangular profile groove.

8. Flat key profile according to claim 1, wherein the shoulders have a symmetrical or asymmetrical depth.

9. Flat key profile according to claim 1, wherein a profile groove provided above and below the opposite parcentric profile groove.

10. Flat key profile according to claim 1, wherein at all triangular profile grooves paragraphs are provided.

Description

[0022] The invention will be explained in more detail with reference to the drawings.

[0023] Showing:

[0024] FIG. 1 a partial side view of a key with head and profiled shaft,

[0025] FIG. 2 a cross section through the profiled shaft and

[0026] FIG. 3 a modified embodiment in cross section.

[0027] The key shaft is labeled 1. From the key side surface, the deeper profile groove 2 goes out, which extends paracentrally over the median plane. The profile groove 2 is formed symmetrically and has the angle alpha (). Likewise, the profile grooves are formed over and under the profile groove 2 on the other key side. These are marked 3 and 4 and have an angle beta (). At the bottom of the incisions, there is a radius (R). To the three incisions each with dashed lines 5, 6, 7 is drawn a rectangle that represents the rectangular incisions by means of a mechanical profile copying machine.

[0028] In detail, the arrangement of the paracentric profile groove with respect to the opposite profile grooves is such that an imaginary line 7, perpendicular to the key plane from the intersection of the upper or lower leg of the paracentric profile groove with the key side surface to the opposite profile groove, to an imaginary line 5, which extends from the intersection of the upper or lower leg of the opposite profile groove with the key side surface to the paracentric profile groove, a vertical distance 9 has.

[0029] This results in horizontal and vertical distances. The horizontal distance 8 should be a maximum of 0.3 mm, the vertical coverage 9 minimum 0.2 mm. The angle alpha from the deeper incision should be 110. The radius R should be 0.2 mm. The angle beta is freely selectable according to the distances 8 and 9. The incisions (profile features) should preferably lie in the lower area of the key, ie in whichstarting from the key breastis notched.