AT521007A2 - PEN CYLINDER KEY SYSTEM AND KEYS FOR IT - Google Patents

Abstract

There is described a pin cylinder key system in which a cylinder is arranged in a housing with a cylindrical bore, the cylinder core is rotatably mounted in the housing and has a key slot into which a key designed as a key (1) is inserted. In the key blade (2) guides are provided and also incorporated in the longitudinal direction of the key blade (2) a closing coding, which cooperate with locking pins in the cylinder core. With the stepped key (1) inserted, the lock pins abut in retracted areas (5) in the key blade, which are provided for receiving the lock pins at the respective closing and opening positions and between which different projecting portions are formed. By manufacturing, according to which the recessed areas (5) are milled or ground in the key blade (2), created peaks or spikes, which can cause injury and which are also easily damaged, so that the key (1) after a single fall may already become unusable under certain circumstances. According to the invention, a step key is provided in which the projecting tips are formed as flats (6). In addition, a step key is provided for such a pin cylinder key system.

Description

The invention relates to a pin cylinder key system according to the preamble of claim 1 and a key for such a pin cylinder key system.

Such pin cylinder key systems and the keys therefor are known and have one or more differently equipped locking codes, generally on the key blade of the key, which, in cooperation with the locking cylinder, ensure that this lock is unlocked or closed when the appropriate key is inserted.

Keys are very common, the locking coding of which is ground or milled into the key blade, in such a way that the key blade has on its underside a series of higher and lower points with corresponding incisions between them. These spikes are usually production-related and have relatively sharp edges and tips. The incisions between the tips or spikes are decisive for the actual key coding. As a rule, these tips or serrations result from the fact that a milling process or grinding process creates that depth of the incision or recess which, in cooperation with a respective locking pin in the actual lock, ensures their respective locking position or unlocking position.

For example, from DE 21 2004 000 034 U1 a system known as a lock and key system and a pin cylinder key system with an additional code combination is known. In this case, a double locking code is formed on the key blade of the key in the form of regions which are arranged one above the other and are cut out in a jag-like manner by a groove-like web.

DE 92 11 896.8 U describes a profile cylinder referred to as a cylinder lock, in which cut areas formed on the key blade, interacting with the locking pins and provided with tines are provided, which corresponds to a design that is common for many keys or pin cylinder key systems.

/ 11

24906-AT

WO 01/77466 A1 describes a security reversible key and a corresponding locking system. With this known key, a block groove defining the locking code is worked out in the key tip area in the key tip area up to the first position of a row of teeth in the lock. For security reasons, the keys have at least three, preferably at least four, rows of codes or tumblers, which are also arranged on the flat sides of the key. The block groove is intended to achieve an additional insertion lock and a higher number of permutations.

Furthermore, a key and tumblers for multi-locking system systems are known from DE 43 13 066 A1. In these known systems or keys, too, the locking code usually provided on the key blade is in the form of alternating spikes, ie. H. Tips and depressions.

It is common to all known keys that the keys are made in the area of their coding in such a way that tips or pointed prongs are arranged between depressions or are left standing in the course of the preparation of the depressions necessary for the locking pins. These tips not only have the disadvantage that they pose a risk of injury, they also help to damage the fabric when inserted unprotected into pockets such as jacket pockets or trouser pockets. In addition, burrs can form relatively quickly when a key falls to the ground, for example. This ridge often prevents the key from being used at a later time because it can no longer be inserted into the key slot of the cylinder.

The object of the present invention is therefore to provide a key for a pin cylinder key system which avoids the above disadvantages, nevertheless guarantees an unchanged locking coding and is also unchanged with regard to the locking coding and which, in addition, is not as easily damaged by falling as the known keys can, so that a long use of such a key can be guaranteed error-free and problem-free with constant security.

/ 11

24906-AT

This object is achieved with a pin cylinder key system with the features according to claim 1 and with a step key for such a pin cylinder key system with the features according to claim 4. Appropriate further developments for the pin cylinder key system and the step key are defined in the respective dependent claims.

The pin cylinder key system according to the invention is preferably designed as a 6 or 5 pin system and has a cylinder with a housing with a cylindrical bore, the cylinder core of which is rotatably mounted in the cylindrical bore in the housing and which has a key slot in which locking pins are arranged, and a key, which can be inserted with its key blade into the key slot. The key blade of the key designed as a step key has in its longitudinal direction extending groove-like webs and / or shoulders which correspond in shape to the key slot, so that the key with its key blade can be inserted into the key slot and guided there accordingly.

Steps arranged in the longitudinal direction are provided on the key blade, between which differently protruding or protruding and retracted areas are arranged. The retracted areas, with their respective incision depths, serve to fix the position of the preferably spring-loaded locking pins which, when the key is inserted, are pressed against these retracted areas at the position of the respective incision by the action of the springs. The retracted areas form a locking code with the locking pins, so to speak, so that the cylinder core can be rotated in the bore when the step key is inserted and the cylinder can be opened in a lock. It goes without saying that an open cylinder can also be locked again when the step key is inserted.

According to the invention, the key designed as a step key has flats in the case of keys according to the prior art instead of the areas designed as protruding tips between the respective retracted areas on the key blade. This means that otherwise the conventional keys come from / 11

24906-AT, depending on the position, the remaining peaks between the actual retracted areas that implement the locking coding are flattened as far as possible in an additional work step, so that the retracted areas are retained with regard to their incision depth. That is, the respective flattenings can take place at the respective position on the key blade so that the flattenings just extend up to the respective incision depth of the depressed retracted areas. As a rule, it is sufficient that the tips on the key blade are removed and that the flats do not reach the respective maximum incision depth and that there is no longer any risk of injury. If the tips are no longer present, the risk of damage to the key blade when it falls down is no longer present to the extent that the risk of jamming due to the formation of burrs on the tips can be largely eliminated. If the tips on the key blade are no longer present, the risk of an unprotected key in a pocket can damage the fabric. A step key is understood here to mean a spike-free key.

According to a further development, the key blade has additional recesses on its side faces which, in cooperation with the additional locking pins provided in the side locking cylinder, form an additional locking code. This additional locking coding consists in the fact that additional depressions are provided in the side surfaces which are arranged according to the coding and into which pins protrude when the key is in the complete insertion position. The combination of the locking pins provided in the different levels of the locking cylinder and thus also of the key then enables the pin cylinder to be opened or closed.

The flattenings preferably extend to a maximum of the respective incision depth of the retracted areas. These areas span a respective incision depth, which in the case of a key according to the prior art are generally internal tips formed between teeth of the projecting areas. The cylinder pins of the pin cylinder key system are spring loaded and strike the deepest points of an incision defining the incision depth. The production-related nor / 11

24906-AT tips that remain standing next to the incisions are irrelevant to the actual closing or locking process of a locking cylinder. The production-related peaks can now be flattened, for example up to half or up to two thirds, but they can also be flattened, so to speak, to the bottom, i.e. H. up to the respective incision depth. Then it is ensured that the cylinder pins of the pin cylinder key system reliably open and close because the cylindrical pins strike the correct position there on the steps in the flat areas around the incisions. As a result, the key is completely free of jags, the locking coding being formed by corresponding step heights. This also ensures that spikes in pockets or jackets, for example, do not destroy the fabric or are damaged when falling to the ground, which can result in the key becoming completely unusable.

According to a further aspect, a step key of a pin cylinder key system is described, in which the key blade between the retracted areas for the locking pins, which form a locking code, is designed to be tip-free. This means that the peaks that otherwise exist due to the manufacturing process have not only been broken between the withdrawn areas, but are generally flattened as far as possible. The respective flats preferably extend to a maximum of the respective incision depth, so that the result after producing such complete flats is an actual step key.

Further details of the invention will now be explained in more detail with reference to the drawing shown. The figures show:

Figure 1 shows a key according to the prior art with tips or spikes arranged on the key blade;

FIG. 2a) a key for a pin cylinder-key system according to the invention, in which the protruding tooth areas present between the incisions defining the incision depth are shown hatched;

2b) shows a key blade of the key according to FIG. 2a), in which the hatched tips from FIG. 2a) have been removed; and / 11

24906-AT

Figure 3 shows an embodiment according to the invention, in which the tips between the retracted areas for the locking pins are partially flattened.

1 shows a key according to the prior art, in which the key 1 is formed with a key blade 2 with webs 3 extending in the longitudinal direction thereof, which extends through one on one side of the key blade or on its two sides over its longitudinal direction result in incorporated groove. This web is used for guiding when inserting the key into a key slot of a cylinder core of a cylinder. On the key blade 2, a sequence of teeth and recesses of different sizes is formed on the underside thereof. The differently protruding prongs represent areas 4 which are provided with tips. Retracted areas 5 are arranged between these pointed areas 4. For the normal locking function of such keys, it is the retracted areas 5 into which locking pins of the cylinder core engage when the key is inserted, so that the cylinder can be unlocked or locked. Such locking coding is obtained by preferably retracting the retracted areas 5. This creates the protruding areas 4. These tip areas are generally relatively sharp-edged and can lead to injuries or damage objects with which they come into contact, such as. B. the fabric of trouser pockets or other pockets. These tips are relatively sensitive and can easily be damaged if a key falls to the floor, for example. With even a small burr on these tips, it is often no longer possible to insert the key into a cylinder core in such a way that this is possible at all or at least the cylinder core is not damaged.

In Figure 2a) is a basic view of a key according to the prior art is shown, in which incisions are provided with a respectively defined incision depth, which form the abutments for the cylinder pins in the cylinder core and between which protruding areas are present in the form of tips, which are hatched in Figure 2a). The respective area of the greatest incision depth is identified in FIG. 2a) by a baseline, the tip regions protruding from the baseline and the maximum incision depth being hatched. These top areas remain, so to speak / 11

24906-AT when milling or working in the retracted areas with conventional keys stand and form the previously described risk of injury and damage.

In FIG. 2b) only the key blade is shown as an example, which is shown for an actual step key, which arises from the fact that the protruding areas 4 shown hatched according to FIG. 2a) are milled or otherwise processed. For the locking pins in the cylinder core, the maximum depths corresponding to the deepest incision depth remain in the key blade, without the need for the above-mentioned areas hatched in FIG. 2a). This creates a real step key, the functionality of which including its security is fully retained, but the risk of damage is excluded. Because the tips are no longer present, even a falling key is no longer easily provided with a burr or other damage which could result in its unusability.

According to Figure 3, the key shown in Figure 1 is now modified such that the protruding tips 4 are all more or less completely flattened. Such a modified key represents a step key. The flats 6 can only be chosen so far that the abutments for the locking pins still retain the depth of cut on the key blade required for opening or closing the lock. In principle, however, it is sufficient if the above areas are not processed to a maximum of the incision depth of the respective retracted areas, i. H. are flattened. Tips that are flattened in this way can no longer lead to injuries, damage to objects with which the key comes into contact is also ruled out, and there is no longer any other risk that the key on the key blade will be damaged if the key falls down. The basic structure of a pin cylinder is known per se and is therefore not further described here.

Claims (3)

1. Pin cylinder key system, which is designed as a 6 or 5 pin system and has the following: a cylinder with a housing with a cylindrical bore, the cylinder core of which is rotatably mounted in the cylindrical bore in the housing and which has a key slot in which locking pins are arranged, and a toothless key (1) which with its key blade (2) enters the key slot is insertable and which there corresponds to the key slot with webs (3) and / or shoulders extending in the longitudinal direction of the key blade and forms steps on the key blade (2) arranged in its longitudinal direction between differently protruding (4) and retracted areas (5) has, the retracted areas (5) cooperating with the locking pins in the sense of a locking code, so that the cylinder core can be rotated in the bore when the key is inserted, characterized in that the key (1) is a step key which is located on the key blade between d The respective retracted areas (5) have areas with flats (6), the flats (6) reaching a maximum of the respective incision depth of the retracted areas (5). 2. pin-cylinder-key system according to claim 1, characterized in that the key blade (2) has additional recesses (7) which form an additional locking code in cooperation with lateral locking pins provided in the cylinder core. 3. jag-free step key of a pin cylinder key system, which has on its key blade (2) between retracted areas (5) for locking pins, which form a locking code with the retracted areas (5), tip-free areas, in which those between the retracted Areas (5) of flattened areas (6) reach a maximum of the respective incision depth of the retracted areas (5).