EP0725197B1 - Flat key for cylinder lock - Google Patents

Abstract

A key has a flat key body having a blade extending along a longitudinal insert axis and having a front edge formed with transversely directed bitting, an opposite longitudinally extending back edge, and a pair of oppositely directed faces. Each face is formed with at least two longitudinally extending front grooves extending adjacent the front edge a full length of the blade and having depths equal to more than half of a transverse thickness of the blade, a longitudinally extending back groove having a floor at a depth equal to less than half of the blade thickness, and an elongated angled groove extending at an acute angle to and across the respective back groove at an intersection and having a part-cylindrical floor aligned with and forming a smooth continuation of the floor of the respective back groove at the intersection. The angled groove of the one face extends nonparallel to the angled groove of the other face, that is axes of the angled grooves on one face are all parallel to each other and cross similar axes of the grooves on the other face.

Description

The invention relates to a flat key for a Cylinder lock, and with a flat key and associated cylinder locks a profile arrangement such that the flat key longitudinal ribs and / or on the key flat sides Has longitudinal grooves in the direction of insertion of the key run into the key channel, in addition to the Longitudinal ribs and / or longitudinal grooves inclined profile grooves are provided are at least one of the longitudinal ribs or grooves to cut.

This arrangement previously proposed by the applicant (WO 93/09317) shows one on the key flat side additionally superimposed over a conventional longitudinal profile Oblique profiling. For working out Such locking systems are particularly valuable for locking systems, because a large number of mutually independent variation points can be provided with the key nevertheless remains wear-resistant.

With the present invention, the advantages of known profile system can be reinforced by the Variation number increased considerably and the mechanical Stability of the key is kept sufficiently high.

The subject invention is characterized in that that at least one on each of the key flat sides Inclined profile groove is provided, the inclined profile grooves of the two flat sides of a key or whose extension line cross each other in space that the key in the incision area of the key face has at least four longitudinal grooves, each of the central longitudinal plane tower and that in the area of the key back at least one longitudinal groove is provided, the bottom of the profile groove with the circular arc in the preferred manner Profile groove base of the oblique profile groove (s) coincides. The lowest and the uppermost of the at least are preferred 4 longitudinal grooves in the incision area for the formation of Locking systems did not vary, while the two middle ones Longitudinal grooves are variable in terms of location and arrangement. The angled profile grooves on each key flat side can be used be arranged in two groups, each Group for the formation of variations, preferably 5 control points and thus have a maximum of 5 inclined profile grooves. This results in a total of 20 control points for the variation.

In the following, the invention is based on a few exemplary embodiments explained in more detail. Fig. 1 shows the side view of a key according to the invention. Fig. 2 shows schematically a preferred embodiment of the profile system and Figs. 3 and 4 show two embodiments for profiles according to the invention. 5, 6 and 7 are cross sections through a cylinder lock with inserted Key and FIGS. 8 to 11 show the key laterally scanning organs.

1, the flat key 1 comprises the key shaft 2 and the Reide 3. The height of the key shaft is composed of the incision area 4 and the Back area 5. Each of the key flat sides 6 has two Types of Profiling on. First, there is a conventional one Longitudinal profiling in the direction of insertion of the key. In Fig. 1 this longitudinal profile is on one key flat side through the given three longitudinal grooves 7.

Others are provided in two groups of inclined profile grooves 8, the location and existence or not Presence are variable. The oblique profile grooves are opposite the key insertion direction and through the extension line 9 is the angular Alignment to the vertical on the key back shown. If there are several on one key flat side Inclined profile grooves 8 are provided, these are each other parallel, with the one on the other key flat side arranged oblique profile grooves or their extension lines 10th the aforementioned oblique profile grooves 8 or their extension lines 9 cross in space.

The incision area 4 described above is the area in which the incisions from the key chest 38 11 are sufficient to control tumblers can. For example, each of the five shown Incisions 11 have ten different depths of variation (see also Fig. 4).

2 is the new profile arrangement according to the invention presented in terms of its system. In the incision area are the four longitudinal profile grooves 12, 13, 14 and 15. The grooves always protrude beyond the central longitudinal plane 16, so that the profile is continuously overlapped in the incision area. The longitudinal profile grooves 12 and 15 are within a profile series always the same in terms of location and shape, while the longitudinal profile grooves 13 and 14 in their arrangement are variable according to the situation, as further below is explained.

The profile groove base 17 is further schematically shown in FIG. 2 the oblique profile groove 8 is drawn. The bottom of the profile groove 17 is arcuate, in particular as a segment of a circle. The Profilnutengrund 17 ends in the associated Key flat side 6 or in the longitudinal profile groove 14. This ensures that the edge region 39 of the Key back 18 runs smoothly.

In the back area 5 of the key profile can be used for variation two longitudinal profile grooves 19 on each key flat side, 20 are provided. The Profilnutengrund 21 of these longitudinal profile grooves coincides with the profile groove base 17 of the oblique profile grooves 8 together. The profile depth to the key back 18 is getting flatter.

This measure advantageously achieves that the key has the necessary mechanical stability maintains this even if a variation of the Key requires many millings, creating one "Rugged" profiling arises with which a relatively large amount Key material is taken away.

With the reference number 22 are purely schematic scanning elements of the castle with which the presence is drawn or no inclined profile grooves 8 is scanned.

3 and 4 show two different profile variants 2 in the form of the key channel. The Key profile is designed analogously.

Fig. 4 shows the six points of variation of the longitudinal profile grooves. The four possible longitudinal profile grooves a, b, d and e can either be provided or not provided. There is always an overlap at the variation points c and f Longitudinal groove provided, but the position according to the height can be varied, resulting in a variation point results.

Fig. 3 shows the variant with the longitudinal profile grooves a, d and e, and the upper parts of the profile grooves c and f.

Fig. 4 shows a variation where the profile grooves on the key side d and e and the lower parts of the profile grooves c and f are used. The profile grooves on the key naturally correspond to core ribs of the key channel.

4 also shows the incision milling depths that are possible, for example 39 drawn, the optional for the control of tumbler pins can be provided (Fig. 1, reference numeral 11).

The profile systematics shown and described looks in Key channel six freely variable ribs (a - f) in front. In order not to open the key channel in the back area in practice, a variation can be dispensed with , e.g. the core rib d is always provided becomes. In this case there are only five ribs for the Combination available with five longitudinal profile grooves on the key correspond.

If preferred, the oblique profile on everyone Key flat page 2 groups of 5 variation digits each has what can mean a maximum of 20 inclined profile grooves, the five variable longitudinal profiles result in a number of variations of approximately 35.5 million different profiles. This can still be done with the number of variations in the incision milling multiplied for each of the tumbler pins become. The result is an extremely high number of variations, where the individual variation points are independent of each other can be used. The key cross section ensures in any case sufficiently high stability. The analog The key channel profile of the lock is especially critical The area of the incisions is strongly curved and formed as an overlapped profile, whereby the locking is made considerably more difficult.

In Fig. 4 are the depths of cut with the parallel Lines 39 are drawn. The top line 39 limits the Notch area 4 (Fig. 1).

3 a tumbler pin 27 is in the key channel marked how it protrudes into the key channel, if no key is inserted.

The key channel shown in Fig. 3 is in the back area advantageously narrow because the core ribs a, d and e are provided. 4 are the core ribs a and b are absent, creating the profile is more open in the back area. In practice, in preferably at least the core rib d and in the present Case both ribs d and e provided to the Palpation of the lock difficult and the key when To guide insertion better.

A comparison, for example, of the ribs (or the analog ones Grooves on the key) with the reference symbol f of the two FIGS. 3 and 4 illustrate the profile design when varying at this point. The middle section 40 remains at the Core rib always preserved from full material, regardless depending on whether the rib starts from the central part 40 below (Fig. 4) or up (Fig. 3). The same applies analogously to the longitudinal grooves in the key.

The key according to the invention is scanned in a lock, as already in principle by the applicant was proposed and described. The following Fig. 5 to 10 are said to function again explain.

Fig. 5 and the following show the cylinder core 24, which in the Cylinder housing 25 is rotatable. In the key channel 26 is an inventive key 1 inserted. The in tumbler pin 27 arranged in a conventional manner under the pressure of the spring 28 the incision 29 on Key beard off.

The longitudinal profile grooves of the flat key 1 are more common Way from the appropriately trained core ribs of the key channel 26 scanned. If the key fits it can be pushed into the key channel, otherwise insertion is prevented. The core ribs of the The key channel protrudes beyond the central longitudinal plane in the incision area 16, which gives the overlap effect.

The scanning of the oblique profile grooves 8 is done by locking strips 30 carried out, preferably a Block bar all provided on a flat key page Slanted profile grooves or ribs 8 scanned. Just if the scanning end 31 with the inclined profile grooves 8 of the associated Key flat side fits together, the locking bar 30 pushed inwards in the cylinder core 24 are so that the locking end 32 engages with the locking recess 33 releases, after which the cylinder core 24 rotates can be.

The section through the locking bar 30 on the right side 5 is placed somewhat differently than on the left side and shows a control pin 34. The control pin 34 scans a part of the key where the key material must be fully preserved. This is the place 41 between the two groups of inclined profile grooves (Fig. 1). The way it works is described below. Through the control pin provided on each of the locking bars is prevented from being abusive Key imitators removed key material over a large area can be used to measure the effectiveness of the scan To bypass locking bars.

Fig. 6 shows a section analogous to Fig. 5, however has a rib 35 in the left half of the key and is therefore a wrong key. This rib 35 prevents the locking bar 30 from immersing in the cylinder core. The locking end 32 prevents the twisting Cylinder core.

At the location of control pin 34 shown on the right if the key 1 has no key material, it is a wrong key, and the consequence of it is in shown in the following Figure 7.

7 is in the lock and key of FIG. 6th the cylinder core has been twisted so far (what by the Release of the other locking elements was made possible) that the scanning head 36 of the control pin 34 the housing part of the Tumbler pin 27 is opposite. In this area the cylinder core has a locking recess 37 into which the housing pin 27 is immersed under the pressure of the spring 28. He can do this because of the control pin on the shift is not hindered because the corresponding key material is missing. Thus, the cylinder core is caught and the lock blocked.

By changing the design of the recess 37 (with Treads) that can be made the key turned back to its starting position and removed again can be.

8, 9, 10 and 11 show the locking bar 30 and the control pin 34 slidable therein.

The locking bar 30 is on both sides of the key channel displaceable in corresponding slots 42 in the cylinder core stored (see Fig. 5). The scanning end is the scanning end 31 opposite. This scanning end 31 has the appropriate profiling for the oblique profile grooves 8 of the Key on. The right angle profile group is shown five grooves or ribs and for the left Inclined profile group four ribs and grooves.

The control pin is slidably seated in the recess 43 34, the scanning head 36 and a guide pin 44th includes. The guide pin is in the bore 45 of the locking bar 30 stored so that the control pin and its Readhead 36 is slidable. The way it works is 5 to 7 can be removed.

The web arranged on the underside of the locking bar 30 46 limits the penetration of the locking bar 30 in the Key channel 26 and it is for example on FIG. 5 referred.

Claims (6)

1. Flat key for cylinder lock, which on the flat sides of the key comprises longitudinal ribs and/or longitudinal grooves, which extend in the insertion direction of the key into the key channel, in which case in addition to the longitudinal ribs and/or longitudinal grooves, inclined profile grooves are provided, which intersect at least one of the longitudinal grooves or longitudinal ribs, characterised in that at least one inclined profile groove is provided on each of the flat sides (6) of the key, the inclined profile grooves (8) of the two flat sides (6) of a key or their extension line (9, 10) intersecting each other in space, that in the notch region (4) of the front face (38) of the key, the key comprises at least four longitudinal grooves (12 to 15), which respectively project beyond the central longitudinal plane (16) and that in the region of the back face (18) of the key at least one longitudinal groove (19, 20, a, b, d, e) is provided, whereof the profile groove base coincides with the profile groove base of the inclined profile groove(s), which in a preferred manner is circular.
2. Flat key according to Claim 1, characterised in that the lowermost (15) and the uppermost (12) of the four longitudinal grooves in the notch region (4) for the formation of locking system are not varied, whereas the two central longitudinal grooves (13, 14) are variable as regards position and arrangement.
3. Flat key according to Claim 1 or 2, characterised in that the inclined profile grooves (8) on each flat side of the key are arranged in two groups, in which case each group, for the formation of variations, comprises in a preferred manner five control points and thus a maximum of five inclined profile grooves, thus in total twenty control points.
4. Flat key and associated cylinder locks with a profile arrangement such that on the flat sides of the key longitudinal ribs and/or longitudinal grooves are provided, which extend in the insertion direction of the key into the lock channel, in which case in addition to the longitudinal ribs and/or longitudinal grooves inclined profile grooves are provided, which intersect at least one of the longitudinal grooves or longitudinal ribs, characterised in that at least one inclined profile groove is provided on each of the flat sides (6) of the key, in which case the inclined profile grooves (8) of the two flat sides (6) of a key or their extension line (9, 10) intersect each other in space, that in the notch region (4) of the front side (38) of the key, the key comprises at least four longitudinal grooves (12 to 15), which respectively project beyond the central longitudinal plane (16) and that provided in the region of the back face (18) of the key is at least one longitudinal groove (19, 20, a, b, d, e), whereof the profile groove base coincides with the profile groove base of the inclined profile groove(s), which in a preferred manner is circular.
5. Flat key and associated cylinder locks according to Claim 4, characterised in that the lowermost (15) and the uppermost (12) of the four longitudinal grooves in the notch region (4) for the formation of locking systems are not varied, whereas the two central longitudinal grooves (13, 14) are variable as regards position and arrangement.
6. Flat key and associated cylinder locks according to Claim 4 or 5, characterised in that the inclined profile grooves (8) on each flat side of the key are arranged in two groups, in which case each group, for the formation of variations, comprises in a preferred manner five control points and thus a maximum of five inclined profile grooves, thus in total twenty control points.

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