HK1073877B - Security key and locking cylinder - Google Patents

Description

The invention relates to a combination of security keys and lock cylinders as defined in claim 1.

The safety key and key cylinder of this type have become known in many versions. It is essential that, in the case of high-quality safety keys, these cannot be easily copied onto relatively simple drilling and milling machines. A high-reliability safety key can be achieved, according to the applicant's EP 0 621 384 B1, by attaching the shaft of the safety key to a control element shaped like a pen and stored in the shaft. An additional storage in the key cylinder enables this control element to be incorporated. Such a key cannot be copied with reasonable effort. A so-called single-reliability key with similar control elements has also been identified from a copy of EP 809 282.

The disadvantage of the safety key is the cost of installing the controls and the additional locking in the lock cylinder, which can also adversely affect the combinatorics.

DE 197 45 834 A reveals a key-crank turntable, which has two widths with a set of holes in each. All the key-crank holes are located below the rotor in a cylinder bag. The arrangement of the holes is made with the holes on the downward-facing width of the key inserted in the key channel. The two mentioned holes are intersected in the direction of the keyhole. Accordingly, depending on the turn test, the key hole depths differ. The insertion depth is determined by shoulders that are positioned in the direction of the rotor according to the different depths of insertion in the keyhole arrangement.

GB-A-2 356 016 introduces a safety key and a lock cylinder, with an additional control surface for the safety key formed by a side-sloping and protruding nose.

The EP-A-0 128 475 has introduced a safety key and a key cylinder. The key cylinder has the usual pin grips and a back-up safety element. The back-up safety element is connected to a lever operated by a key bar of the safety key, so that when the key is fully inserted into the key channel, the safety element is displaced in the cylinder cores. The safety key has a forward-facing bridge element that connects the key handle to the key and, when the key is fully inserted, reaches into a rotor outlet.

The purpose of the invention is to create a security key and lock cylinder which provides high copy protection and can be produced at a comparatively low cost.

The problem is solved in the case of a type-appropriate combination of a safety key and a lock cylinder as claimed 1. In the case of the key of the invention, the front extended end of the rotor and the rear end of the key are used to provide additional control surfaces. These control surfaces can be produced particularly cheaply by recesses and especially by slots in the extended front end of the rotor. In the case of the safety key, the control surfaces are produced particularly cheaply by removals and especially by milling on the shoulders of the keychain. The safety key can be a turn key with holes in the keychain or other safety keys, such as a jack key or a wrench key.

A key and the key cylinder according to the invention can be easily integrated into an existing system. In the case of a system supplemented in this way, a general key is possible, which operates both the existing key cylinders and the key cylinders according to the invention. However, the existing security keys cannot open the corresponding new key cylinders. This allows any existing lock system to be expanded and upgraded. The additional control area at the rear end of the shaft is a comparatively high cost, since additional and usually not specifically provided controllers and raw materials are not required.

Another advantage of the invention is that it simplifies the calculation of a system, and increases the flexibility of such systems, and it is easy to form groups that do not affect permutation. The combination theory is greatly enhanced by the invention and the subdivision of groups is simplified.

Other advantages are shown by the dependent claims, the description below and the drawing.

The following illustration shows examples of the invention. Figures 1a to 1c, schematic spatial representations of safety keys according to the invention,Figures 2a to 2c, schematic spatial views of rotors according to the invention,Figures 3c, schematic side view of a half-key and a partially inserted key,Figure 4c, a view of the front of the half-key, omitting the key, andFig. 5a to 5c, schematic front views of key cylinders after further variations.

Figure 1a shows a safety key 1 which has a shaft 6 and a handle 14. The key 1 is a so-called flat key or turn key. The key can also be a jack key or a curve key. The shaft 6 has in a familiar way control holes 7, which are usually embedded in the widths and narrow sides of the shaft 6. These control holes 7 are used to classify the not shown and known in-house supports of an associated lock cylinder 2, which, according to Figure 3a, has a stator 3 and a rotor 4.

The shaft 6 of the key 1 has a front end 6a and a rear end 6b. The front end 6a is used to insert the key 1 into a key channel 5 of the rotor 4 as usual. By inserting the shaft 6 into the key channel 5, the aforementioned brackets are arranged. This unlocks the rotor 4 and allows it to be turned on the key handle 14 to operate the lock.

The control surface 8 is formed by an exception 10 which is embedded in an extended front end 4a of the rotor 4. The control holes 7 are positioned so that the corresponding control surfaces are at lock height when the control surfaces 9 are located on the control surface 8. The control surfaces 10 can be made, for example, with a key flipper. With regard to the control surfaces 5 to 10a in Figure 2, the safety switch in Figure 1 is a key which is also a key for the control surfaces 8 to 9a. The control surfaces 9 and 9a are also a key which is inserted into a control surfaces other than the control surfaces.

In the case of the key 1 as shown in Figure 1b, there are 9' control surfaces, each formed by two 13' lateral inclinations. The 9' control surfaces are arranged in the centre relative to the plane of the key 1. The corresponding rotor 4' is shown in Figure 2b. The 10' inclination is, as can be seen, arranged in the centre of the key channel 5 and forms a control surface 8'.

Err1:Expecting ',' delimiter: line 1 column 60 (char 59)

Err1:Expecting property name enclosed in double quotes: line 1 column 171 (char 170)

As can be seen, the invention makes it possible to construct locking systems with group and individual locks. Existing systems can be supplemented with corresponding rotors and keys. The production of rotors and keys with head extended with the above control surfaces or cams 12 can be produced at a comparatively low cost. The slots or removals in the extended head of the rotor can be varied in many ways.

Figure 4 shows a key cylinder half 32 with a stator 3 and a rotor 4 as shown by the front end of the rotor 4a overhanging the stator 3.

Claims (13)

1. A safety key and locking cylinder (2), the locking cylinder (2) having a stator (3) and a rotor (4, 24), with a front end and a rear end (4a, 4b) and a keyway (5), and the safety key (1) having an upper and a lower surface (14) and a shank (16) which is provided with a plurality of control surfaces (7) for properly positioning tumblers and has a front end and a rear end (6a, 6b), wherein at its front end, the rotor (4) has at least one further control surface, which interacts with a further control surface (8), arranged at the rear end (6b) of the shank (6), wherein the additional control surface of the rotor is formed by a recess in the extended front end of the rotor, characterized in that the recess (10) as an extension of the keyway (5) extends radially in relation to the axis of the rotor (4, 24) and is open at the front side of the rotor (4, 24, wherein the further control surface (9) of the key is formed by at least one recess (13) of reduced thickness on one shoulder (15) of the key (1, 20).
2. The key as claimed in claim 1, wherein the extended front end (4a) of the rotor (4, 24) projects at the front of the stator (3).
3. The key and locking cylinder as claimed in claim 1, wherein the recess is narrower than the keyway (5).
4. The key and locking cylinder as claimed in claim 3, wherein the recess (10) at the front end (4a) of the rotor (4) passes centrally or in a laterally offset manner through the keyway (5).
5. The key and locking cylinder as claimed in claim 1, wherein the recess (10) of the rotor (4) has a depth of not more than 0.5 to 3 mm.
6. The key and locking cylinder as claimed in claim 5, wherein the recess (10) of the rotor (4) has a depth of approximately 1 to 2 mm.
7. The key and locking cylinder as claimed in claim 1, wherein the further control surface (9) of the key (1, 20) is formed by at least one shoulder (15) at the rear end (6b) of the shank (6).
8. The key and locking cylinder as claimed in claim 1, wherein at least two shoulders (15) each have a control surface (9).
9. The key and locking cylinder as claimed in claim 8, wherein it is a turning key and the shank (6) has a plurality of control bores (7) for properly positioning tumblers.
10. The key and locking cylinder as claimed in claim 1, wherein the recess (30, 31) in the extended front end (4a) of the rotor (4) is closed in the direction of the outside of the rotor.
11. A locking system with a plurality of safety keys and locking cylinders as claimed in claim 1, wherein the control surfaces (9, 12) of the safety keys (1, 20) differ in shape and/or position.
12. The locking system as claimed in claim 11, wherein locking cylinders have different further control surfaces (8).
13. The locking system as claimed in claim 12, wherein the further control surfaces (8) of the locking cylinders are formed by recesses (10) at the front end (4a) of the rotor (4) of different extents and/or in different positions.