EP1068415B1 - Cylinder lock with flat key - Google Patents

Description

The invention relates to a cylinder lock with flat key. The cylinder lock has a housing, in this in a rotatable cylinder core and at least two key-controlled pin tumblers on. The flat key has one on both flat sides a longitudinal profile with longitudinal grooves and / or longitudinal ribs having shaft, wherein at least one of the control of a tumbler pin provided key scores of the key beard in a opposite the shaft slimmer formed tip portion is arranged, in which a Peak profile is superior to the shaft profile and the contour of the tip profile within the contour of the shaft profile is located.

Such a cylinder lock is known from US 5 088 306 A, in which the Key channel is adjustable to different flat keys, which only in terms the lateral profiling of their, the key back adjacent, upper Shaft half of each other. At the edge of the rotatable cylinder core are elongated profile strips embedded on both sides of the key channel, whose profile corresponds to the upper half of a particular flat key. To change the cylinder lock to another flat key these Moldings replaced. For adjusting the cylinder lock to a flat key, in which the upper half of the shaft has a front, slimmer tip section own, two-part moldings are provided, in which the rear section to the stem profile and the front portion to the inside of the contour of the Shank profiles lying peak profile are adjusted.

The document DE-A-31 29 577 discloses a cylinder lock and flat key wherein the cylinder lock a housing, in this rotatable cylinder core and at least two key-controlled pin tumblers and wherein Flat key one opposite the shaft slimmer trained tip section is arranged, wherein in the housing one in a slot transverse to the key channel aligned Abtastkulisse is provided, which is opposite to the profile of the Shank section of the keyway slimmer trained link profile for Scanning the tip portion of a flat key has, whose tip portion opposite to its shaft by the removal of key material below Formation of additional grooves in the profile is slimmer.

The document DE-A-31 29 577 relates in particular to a flat key with magnetic bodies, wherein the arrangement of longitudinal profile elements over the entire Length of the stem brings difficulties.

A well-known Nachsperrmethode for cylinder locks is the so-called picking. There are many tools for this method, usually a thin one Inserted into the keyway and by vibration the tumbler pins in Release position. This picking is especially for "open" Key channels easier, since such key channels have plenty of room for the Inserting the picking tool and its vertical movement available put. Such open key channels are either systemic or arise in large locking systems by profile variations, in which many ribs of the Key channel omitted.

However, practice shows that picking makes it considerably more difficult or even impossible is made when the key channel is made so narrow (slender) and overlapping is that the insertion or operation of the Pickingwerkzeuges not is possible. On the other hand, however, are systemic or according to the profile variations the key channels and related Key profiles not always produced in the desired slenderness or the Overlapping nuclear ribs by variation partially eliminated.

An object of the present invention is thus, the key profile and the associated cylinder lock in such a way that the picking is difficult. Furthermore, the possibility of training variations should be increased, too to be able to work out large locking systems.

This is inventively achieved in that in the housing at least one, in a slot disposed between two pin tumblers, across the keyway aligned Abtastkulisse is provided, which is opposite to the profile of the Shank section of the keyway slimmer trained link profile for Scanning the tip portion of a flat key has, whose tip portion opposite to its shaft by the removal of key material below the formation of additional grooves or the extension of existing grooves in the Profile slimmer and formed at least in the beard area as an overlapping profile is.

According to a further feature of the invention, the shank profile of the flat key have as a basic profile a zig-zag profile whose cross-section zig-zag-shaped, directly adjoining diamonds is formed on the profile variations forming and each over the total height of a rhombus connect laterally extending variation profile elements in columns and across are arranged to these horizontal lines, and that the tip profile of the flat key is formed omitting the variation profile elements.

In the following the invention will be explained in more detail with reference to some embodiments. Fig. 1 is a side view of a flat key; Fig. 2 shows the top view a broken cylinder core and Figs. 3 and 4 show two alternatives for a Abtastkulisse; Fig. 5 shows a variant of a key channel cross-section of the cylinder lock; Fig. 6 is a cross section through a further embodiment of the key channel and Fig. 7 shows the associated Key in cross section; Fig. 8 is a cross section through the lock and key another type; Fig. 9 is a section through another type of key.

According to FIG. 1, the key 1 has two regions on its shaft 2 on, namely the shaft portion 3 and the tip section 4 Keybeard is formed by key notches 5, which are known in the art Can be different in depth and with their control surfaces attached to the Control points 13 control the associated tumbler pin.

The shaft portion 3 carries that key longitudinal profile, as it is for the Systematics and the respective closing variation is necessary. This Section can profile elements with relatively large profile ribs 14th have, which in the associated key channel correspondingly large Profile grooves are assigned. Key profile grooves are 15 designated.

In the tip section 4, the profile is slimmer and preferred provided with overlapped profile. The top section is enough from the key tip 6 to at least beyond the region of the first Key notch 5 '. As a dividing line between the two sections is the Line 16 drawn. The dashed drawn subsidence 23 the key back in the tip section can optionally be formed when a scanning gate of Fig. 4 is used. This lowering represents another security feature of the key.

Arrangements and the ratio of the different profile sections to each other will be explained later.

In Schliasselherstellung preferred the key blank the entire shaft length with the shaft profile (key profile grooves 15) provided, for example with a profile cutter. Then in the top section 4 by removal of key material to form additional Grooving or widening existing grooves the profile slimmer made clear as in Fig. 1 with reference numeral 24. The "slimmer" can go to the limit of material strength, because only a small section of the key is affected and none Risk of breakage exists. Preferably, the tip profile is a shaft profile parent profile.

The key profile is from an analog key channel profile scanned the castle. Thus, the key channel profile must be basically an insertion of the entire key shaft allow, so correspond to the profiling of the shaft portion 3 and allow the insertion of the tip profile.

According to Fig. 2 is for the additional sampling of the slimmer (narrower) profiling of the tip portion 4 in the cylinder core 7 a Slot 8 is provided, in which a Abtastkulisse 9 is inserted, such as in two other embodiments in view in Figures 3 and FIG. 4 is shown. The link profile 10 defines the tip profile contour and requires an analogous profiling of the tip section 4 of the flat key.

The keyway 11 is from the slot 8 between two pin holes 21 and 21 'broken. The shank portion 3 of the key shank extends to the insertion of the collar 22 of the cylinder core 20 to the Abtastkulisse 9 in the slot 8. The tip section 4 passes through the Scanning gate and controls with the key notch 5 'behind it Tumbler pin which sits in the pin bore 21 '.

The variant Fig. 3 the Abtastkulisse is open to the top Key channels with continuous key back. The variant Fig. 4 with closed scan gate requires a key tip Lowering 23, as shown in Fig. 1 by dashed lines.

Figures 5 to 7 show embodiments of sections through the Key channel or the inserted key with a cut line after the line V-V in Fig. 2, that is slightly behind the boundary 16 between the shaft portion and the tip portion (Fig. 1).

In Fig. 5 hatched the keyway 11 is located, the a particular illustrated profile contour shows. It is this the shank profile contour of the profile of the shaft section 3. How to recognize can, the key channel thus formed is relatively open, so that a Picking would be possible.

Through the backdrop profile 10 or by its in the keyway 11th protruding profile parts 17 a tighter profile contour is formed, the within the profile contour of the keyway and shaft section lies. The tip section of the key to be inserted thus has to obtain a profile of this slender top profile contour corresponds to when the key is to be fully inserted.

This results in a relatively open profile for the shaft section, as it may be necessary for making variations. From the Scanning gate 9 with the narrow link profile 10 is the tip section slender profiled, as it corresponds to the backdrop profile. The profile contour of the tip section lies within the profile contour of the shaft portion. The entire profile is above the key height overlaps, i.e. protruding into the keyway from both sides Ribs extend at least to the central longitudinal plane 12 or exceed this. The insertion of a very thin plate for the picking is possible at the most up to the sampling gate 9, but not through them. This is the picking of the underlying Tumbler pin impossible.

Fig. 6 shows in cross-section the keyway 11 of another Embodiment of a key with section through the shaft portion. Strichliert those additional profile parts 17 are located, the are provided by the Abtastkulisse 9 and the profile of the Make the tip section slimmer.

7 shows an associated key in section through the tip section, whereby a narrow profile is given in the tip section. Dashed lines those additional grooves are drawn, which are the has the same key in the shaft portion, and whereby the necessary Conclusion is given.

Fig. 8 shows a cross section through a lock with inserted Key of another profile and tumbler variant. The cutting plane lies on the scanning gate 9. The sampling gate is used here for Cover one of the two halves, namely the right half, the Stepped trained pin tumbler 18. A variation can only in the left half shown here, while the right half of the pin tumbler neither from the key nor through one Scanning tool can be achieved. Thus, also in this embodiment a cylinder lock the key channel from the Abtastkulisse 9 kept tight. If in the preceding areas of the Pin tumblers in each case the other right half of the tumbler pins would be used for the variations, would have to by a burglary tool Both the right half of all vorschuliegender tumbler pins as well as the left half of the tumbler pin after the Abtastkulisse 9 are scanned. But this is basically impossible. In Fig. 8 are 19 with the housing, 20 of the cylinder core and 1 of Key designates.

When using graduated core pins in conjunction with both sides keyrings attached coding, it is advantageous the front core pins e.g. with a "right" encoding and to provide the innermost core pin with a "left" coding. at the front core pins then the left coding is milled free (not available) and the innermost core pin the right coding milled free. Thus, the front left key codes and the last right key badge is not effective. The sampling backdrop in front of the innermost pin, only the left half of the profile is released. The Key shaft tip has only the left profile part. Of the Key shank and the front key channel can also left and have right profile parts. When picking would then simultaneously the front pins on the left side and the innermost pin on the right side are attacked. This is not in practice possible.

The key-lock system shown in FIG. 8 is detailed in FIG the Austrian Patentanmsidung A 1847/97 and utility model application GM 681/97 described.

The training of the key profile can be for everyone Profile systems with longitudinal grooves and longitudinal ribs are applied and is not limited to the profile examples shown.

Fig. 9 shows the profile cross-section through another preferred Key profile. The cutting plane runs through the tip profile Viewing direction to the shaft profile. With strong outer contours is one Variant of the shaft profile shown, with thin lines is the Profilsystematik drawn. The shaft profile corresponds to one of the applicant's widespread profile, where as theoretical Basic profile is applied a zigzag-shaped profile. This Profile sits in the cross section of zig-zag-shaped immediately adjacent rhombuses or rhomboid bodies together. Starting from this zigzag-shaped basic profile formed in the shaft profile profile variations in that in the drawn lines 25 each over the entire height of a rhombus a profile element can be arranged. In the present case these are three profile elements a, b and c. The number and arrangement of such profile elements are freely selectable. The shaft profile is in this embodiment does not overlap, i. that the groove grounds 29 is not up come to the longitudinal center plane 26 or over this. The profile elements (a, b and c) are superimposed in the columns 27, 28 of Pirofilsystematik.

The cut tip profile 30 is shown as well as the Shank profile zig-zag shaped by diamonds arranged next to each other formed, the tip profile but omitting the Variational profile elements analogous to the profile elements a, b and c is formed. Furthermore, in the illustrated embodiment the top profile over the entire height of the key shaft with formed a smaller wall thickness, so that it is slimmer. Moreover, the tip profile is overlapped, which means the groove bases 29 reach at least as far as the central longitudinal plane 26 or overtop this.

In this embodiment of FIG. 9 is also clearly visible that it with the inventive design of a cylinder lock and flat key easily possible, already existing locking systems, which formed with the shank profile are to be extended by providing a tip profile as described above with additional protection against picking.

If the flat key is described here, including the key blanks, So those precursors that already have the key profiling, as described in Fig. 9, and only later with the keyholes on the key bit be provided. The technical features shown in the drawings can be combined differently with each other. Thus, e.g. the profile of FIG. 9 also be conical and have the depression 23 in the tip section, which reduces the key height in this section.

Claims (2)

1. Cylinder lock with flat key, whereby the cylinder lock incorporates a housing, a cylinder core rotatable within the same, and at least two key controlled pin closures, and whereby the flat key incorporates a shaft equipped with a longitudinal profile with longitudinal grooves and/or longitudinal ribs on both flat sides, where at least one of the key notches of the key bit is located in a slimmer tip section formed opposite the shaft and envisaged for the control of a closure pin, whereby a tip profile has a higher priority than the shaft profile, and the contour of the tip profile lies within the contour of the shaft profile, characterised in that at least one sensing surface (9) located within a slot between two pin closures (21, 21') and aligned transverse to the key channel is envisaged within the housing, which incorporates a surface profile (10) that is slimmer than the profile of the shaft section of the key channel (11), for sensing the tip section (4) of a flat key (1) whose tip section (4) profile is formed slimmer than its shaft due to a removal of key material whilst forming additional grooves or a widening of existing grooves (24) at least within the bit area in form of an overlapping profile.
2. Cylinder lock with flat key according to Claim 1, characterised in that the shaft profile of the flat key (1) incorporates a zigzag profile as a base profile, the cross-section of which consists of zigzag shaped rhombuses located directly adjacent to one another, followed by variation profile elements (a, b, c) forming profile variations at the side and each extending across the entire height of a rhombus, located within cracks (27, 28) and positioned transverse to these lines (25), and in that the tip profile (30) of the flat key (1) is formed omitting the variation profile element (a, b, c).

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