CZ294056B6 - Combination of a cylindrical lock and a flat key - Google Patents

Abstract

The present invention relates to a combination of a cylindrical lock (1, 1', 1'') and a flat key (2, 2', 2'') that is provided on its one wider surface with a variation groove (5) having its front portion provided in the region of the key (2, 2', 2'') tip with a lead-in enlargement (50) for guiding a side projection (41) of a side adjuster (4). The side projection (41) of the side adjuster (4), being guided in a guide shaft (31), extends into said variation groove (5). When a corresponding key (2) is inserted into a key passage (30), said side adjuster (4) resumes a position in which it is completely inserted into a rotary core (3), and when a wrong key (2) is inserted therein, the side adjuster overlaps (4) said rotary core (3) outer cylindrical surface (3) and engages with opposite locking recess (103) performed in the cylindrical lock (1, 1', 1'') housing (10). Variation groove (5, 511) of a superior key (2) has in at least one position (P1 to P5) in one its functional place (51) controlling the position of the side adjuster (4), a vertical position that differs from the vertical position of the functional place (51) of a variation groove (5, 511', 511'') of a subordinate key (2', 2'') in the same position (P1 to P5) by at least one dimensional distance (a).

Description

Combination of cylinder lock and flat key

Technical field

The invention relates to a combination of a cylinder lock and a flat key to form lock systems with master-master and slave keys, wherein the master-master key can control all locks of the system and only a subset of slave locks can be controlled by slave keys.

BACKGROUND OF THE INVENTION

There are known lock systems with a master-master and at least one slave key, in which the master-master key can be controlled by the master-master key and all slave locks of the system, the first slave key can control the first slave lock and the second to nth slave lock up to finally, only the n-th slave lock can be controlled by the n-th slave key. The rotation of the cylinder lock core is conditioned by aligning the ends of the spring-loaded radial tumblers so that they align with the circumferential cylindrical surface of the rotary core, which is reached by the teeth on the lower narrow edge of the inserted key. In order to be able to insert a key of a plurality of keys with identical teeth on the lower narrow edge of the key into the key channel of the cylinder lock, the cross-section of the flat key is provided with profile grooves and ribs which slide into negatively formed ribs and grooves in the key channel. . In this case, the profile of each subsequent slave key extends at least partially, resp. in some parts, the parent key profile and its associated key channel profile. Thus, the master key cannot be inserted into the master lock key channel, while the master key can be inserted into the master lock key channel and into the key channels of all degrees of the slave locks.

The disadvantage of these locking systems is that for each group of locks, i.e. master, first slave to nth slave, a different key and key channel profile has to be created, which is expensive to manufacture especially in the production of key channels, as well as the possibility of easy mastering the keys of the subordinate simply by grinding over the section of the profile.

Lock systems of cylindrical locks and flat keys are also known, where the master and slave keys and thus their key channel profiles are identical, but where the radial tumblers are formed as multi-part, so that the toothing depth of the master key differs from the toothing depth of the slave keys. Thus, in these systems, the slave keys can be inserted into the key channels of the master locks, but due to the non-unblocking of all the radial pin tumblers caused by the different tooth depth of the slave keys, the rotary core cannot be rotated.

The disadvantage of these systems is the low number of combination options and the low number of safety features.

There are also known lock systems with a combination of the above-mentioned lock systems in which the slave keys of the individual lock system groups have both a different key and key channel profile as well as different recess depths on the lower narrow side of the flat key. These locking systems eliminate the disadvantage of a small number of combination possibilities of the previously described locking systems with identical master and slave key profiles.

However, their disadvantage remains the economic demands of production, resulting from the production of different profiles of both key channels and flat keys for different degrees of slave locks.

DE 36 03 687 discloses a locking device consisting of a cylinder lock and a flat key which, in addition to the cut-outs in the lower narrow side of the key, cooperate

With sprung radial tumblers, and in addition to the profile grooves and ribs on the wider sides of the key, they include an additional variation groove. This additional variation groove is formed in one wider side of the key near its guiding ridge, begins with an extended start at the tip of the key and runs curved or wavy in shape along the guiding upper ridge of the key, so that distances 5 of at least two places in the longitudinal direction the grooves have a different value from the back. An additional variation groove is used to unlock additional unsprung side tumblers, guided in the guide shafts of the rotary core, whose longitudinal axes are vertical and parallel to the plane of the key channel. Side tumblers the length of which corresponds to the length of the guide shaft resp. the length of the chord of the circumferential circle of the rotary core are provided with lateral projections or 10 noses which do not go into the variation groove when inserting the key from the key channel and according to its vertical course the lateral tumblers are vertically aligned so core and did not interfere with opposing blocking recesses in the cylinder lock housing.

These side tumblers serve as additional safety features of the lock system with spring-loaded radial tumblers, controlled by slits on the lower narrow side of the key and cannot serve to distinguish between master and slave locks in master-master and slave key lock systems.

SUMMARY OF THE INVENTION

The above-mentioned disadvantages are substantially eliminated by the combination of the cylinder lock and the flat key according to the preamble of the patent claim, characterized in that the variation groove 25 of the master key has at least one position at one of its functional positions controlling the tumbler alignment. differs from the vertical position of the function key of the variation groove of the slave key at the same position by at least one dimensional step, wherein the length of at least one arm of the tumbler of the master lock cooperating with said function point by its side projection is greater by at least one dimensional step 30 corresponding side arm tumbler of the slave lock, where the side tumbler of the slave lock is shortened from the arms from the side projection, in the direction of which the vertical distance of the functional position of the variation groove is made the slave key from the function point of the variation groove of the parent key.

Such a construction is less expensive to manufacture than creating different key channel and key profiles for each slave group and much more combinations and many more slave group grades can be achieved with such prior art systems.

It is preferred that the length of the side tumbler of the master lock is greater by at least one dimensional offset than the length of the side tumbler of the slave lock.

Such a construction further increases the number of possible combinations

It is also preferred that the variation grooves are formed on both wider sides of the flat key.

This embodiment further increases the number of combination possibilities and extends the number of security features of the locking system.

Furthermore, it is advantageous if the narrow side of the flat key opposite its back is provided with cut-outs cooperating with radial pin tumblers.

This construction further increases both the number of combination options and the number of safety features.

-2GB 294056 B6 i

BRIEF DESCRIPTION OF THE DRAWINGS

Some examples of embodiments of the invention are schematically illustrated in the accompanying drawings, in which the figures show:

Fig. 1a shows a longitudinal section through the master cylinder lock with the master key inserted - the first variant, Fig. lb a cross-section of the cylinder lock of Fig. Ia in axis 311, Fig. lc a view of the rotary core of the cylinder lock of Fig. Ia towards S; Fig. 2a is a longitudinal section of the first slave cylinder lock with the first slave key inserted - the first variant, Fig. 2b a cross-section of Fig. 2a in axis 311, Fig. 3 and a longitudinal section of the second slave cylinder lock with the second slave key inserted. FIG. 3b is a cross-section of FIG. 3a in axis 311, FIG. 4 is a cross-section of a second slave cylinder lock as in FIG. 3b, but with a master key-first variant inserted, FIG. 5 cross-section of a second slave cylinder lock as in FIG. Fig. 3b, but with the first slave key inserted - the first variant, fig. 6 a cross-section of the master cylinder-general lock j 1b, but with the second slave key inserted - the first variant, FIG. 7 schematically the variation grooves of the first variant according to FIGS. Ia, 2a, 3a, FIG. 8 schematically the variation grooves of the second variant, FIG. Fig. 8b cross section of the first slave lock with the first slave key inserted - second variant fig. 8c cross section of the second slave lock with the second slave key inserted second variant fig. 9 schematically the variation grooves of the third variant, fig. Fig. 9b cross-section of a first slave lock with a first slave key inserted - a third variant, Fig. 9c a cross-section of a second slave lock with a second slave key inserted - a third variant.

DETAILED DESCRIPTION OF THE INVENTION

As is apparent from the accompanying drawings, an exemplary lock system with master and slave flat keys consists of a master cylinder lock 1 (FIGS. Ia, 1b), a first slave lock 1 '(FIGS. 2a, 2b), a second slave lock 1 (FIGS. 3a, 3b) and the master master key 2, the first slave key 2 'and the second slave key 2. Each cylinder lock 1, Γ, 1 consists of a housing 10 in which the rotary core 3 with the key channel 30 is housed. a longitudinal plane of symmetry of the housing 10 is provided with a plurality of radial bores 101 in which the box pin tumblers 102 are spring-mounted to abut the core pin tumblers 33

The rotary core 3 is provided with two rows of guide shafts 31 arranged vertically and parallel to the longitudinal plane of the key channel 30, wherein the guide shafts 31 are arranged. in the regions between adjacent radial bores 310 for the core pin tumblers 33. In the guide shafts 31, unsprung suspension pin-shaped side tumblers 4 are provided, provided with lateral projections 41 for engaging the variation groove 5 of the flat key 2. On the side opposite the lateral projection 41 the side tumbler 4 is provided with a guiding flag 42 mounted in the guide slot 32 of the core 3, and this prevents the side tumbler 4 from rotating about its longitudinal axis 311. In contrast to the ends of the guide shafts 31 in the pivoting core 3 10 create This includes locking recesses 103 into which the ends of the tumbler arms 44, 45 engage when the key 2 is inserted into the key channel 30 and when an inappropriate key is inserted into the key channel 30. If at least the end of one arm 44, 45 engages the locking recess 103, the lock is locked and the rotary core 3 cannot be rotated. The flat key 2 is provided on its lower narrow side opposite its spine 21 with slots 22 cooperating with radial core pin tumblers 33 and on each of its wider sides having a variation groove 5. The front of the variation groove 5, 511, 51Γ. 511 in the region of the tip of the key 2 is provided with an inlet extension 50 and then extends approximately in the shape of a wavy line along the guide spine 21. The functional positions 51 of the variation groove 5 are those which position the vertical position of the lateral pin 41 1a, 2a, 3a show the intersections of the projections of the axes 311 with the variation groove 5. The cross-sections of the function points 51 at the position P4 are shown in Figs. 1b, 2b, 3b. As can be seen from FIG. 1a, which represents the master lock 1 with the master key 2 inserted, there is one function location 51 of the variation groove 5, 511 of the master key 2 closest to the upper spine 21 as compared to the first slave key 2 ', 2a is inserted into the first slave lock V. Here, the corresponding functional position 51 of the variation groove 5, 511 'is shifted one step and downwards vertically - see FIG. 7. The second slave key 2, which is in FIG. 3a As shown in Fig. 7, the functional position 51 is offset by one offset and downwardly relative to the first slave key 2 'and thus by two rebounds and downwardly relative to the master key 2 (see FIG. 7). Referring to FIG. 1b, a general lock 1 is assigned a side tumbler 4 with a length L equal to the length of the chord of the rotary core 3 at the location of the side tumbler 4, the length of the upper arm 44 being h and the length of the lower arm 45 being 7. As can be seen from FIG. 2b, a first tumbler 4 with a length L '= L-a is assigned to the first slave lock přičemž, and the lower arm 45, whose length is l-a, is shortened by a jump. the length h of the upper arm 44 remains unchanged. As shown in FIG. 3b, a second tumbler 4 is assigned to the second slave lock 1, the length of which is L = L-2a, while the lower arm 45, whose length is 1-2a, is shortened by a bump 2a; the length h of the upper arm 44 remains unchanged.

Fig. 4 shows a cross-section of the second slave cylinder lock 1 as in Fig. 3b but with the master key 2 shown in Fig. 1a inserted. It can be seen from FIG. 4 that the side tumbler 4 does not extend into its locking recesses 103 of the housing 10 with its ends and the rotary core 3 with the master key 2 can be rotated.

FIG. 5 shows a cross-section of the second slave cylinder lock 1 as in FIG. 3b but with the first slave key 2 ' shown in FIG. 2a. Thus, this cylinder lock V 'is the master key. It can be seen from the figure that the side tumbler 4 does not extend into its locking recesses 103 of the housing 10 with its ends and the rotary core 3 with the first slave key 2 'can be rotated.

Fig. 6 shows a cross-section of the general lock 1 as in Fig. 1b but with the second slave key 2 inserted. It can be seen that the lower arm 45 of the side tumbler 4 extends into the locking recess 103 in the length of two rebounds. the second slave key 2 cannot be rotated.

In the above-described example of the first variation waveform of the variation groove 5 at position P4, the function location 51 of the general variation groove 511 of the master key 2 is located closest to the spine 21, the functional location 51 of the first subordinate variation groove 511 ' by one bounce and and the function point 51 of the second slave variation groove 51Γ 'of the second slave key 2 is offset from the function point 51 of the master key 2 by two bounces and downwards, and thus from the function position 51 of the first slave key 2' . The diagrams of the first variation groove variant 5, 511, 511 'are schematically. 511 shown in FIG. 7.

FIG. 8 is a schematic representation of a second variation curve of the variation groove 5, 511, 51hů. 511. where the functional variation groove 51 is in the middle, the functional 51 of the first subordinate variation groove 511 'is shifted one step up and up towards the spine 21, and the functional 51 of the second sub-variation groove 511 is shifted from the function key 51 of the master key 2 by one step and downwards. Analogous to Figures 1b, 2b, 3b, Figures 8a show a cross-sectional view of the function location 51 of the general lock 1 with the master key 2, Fig. 8b showing the same cross section but the first slave lock V with the first slave key 2 'and 8c the same. 8a, the length L of the side tumbler 4 of the general lock is equal to the length of the chord of its core 3. As shown in FIG. 8b, the side tumbler 4 has the first slave lock Γ shortened compared to side tumbler 4 of general lock 1 upper arm 44 by one step and lower arm 45 is not shortened, since the functional point 51 of the first slave lock Γ has shifted upward by a step a compared to the function point 51 of the master key 2. 8c, the side tumbler 4 of the second slave lock 2 has been shortened relative to the side tumbler 4 in general. The lower arm 44 and both the upper arm 44 and the lower arm 45, since the functional position 51 of the first slave key 2 ' is shifted one step up and the functional position 51 of the second slave key 2 is offset by one offset and downward from the function location 51 of the first slave key 2 '.

FIG. 9 schematically shows a third variation of the variation groove 5, 511, 511 '. 511. wherein the functional variation slot 51 of the general variation groove 511 is the lowest from the spine 21. the functional position 51 'of the first subordinate variation groove 511' is one step higher and higher, and the functional location 51 of the second subordinate variation groove 511 is two offset above. 9a, 9b, 9c in which the keys 2, 2 ', 2 of the corresponding steps are inserted, the side tumbler 4 of the general lock 1 has a length L equal to the length of the chord of the rotary core 3, the side tumbler 4 the first slave lock Γ (Fig. 9b) has the upper arm 44 shortened by a bounce and has a length L '= La; the side tumbler 4 of the second slave lock 1 (FIG. 9c) has the upper arm 44 shortened by two bounces and has a length L-L-2a.

From the examples, it is evident that the function site 51 of the variation groove 5 of each subsequent slave key 2 ', 2 is offset vertically from the function site 51 of the master key 2 by at least one offset and up or down so as not to overlap with the function site 51 5 at the same position P4 of another key 2, 2 ', 2 and its associated side tumbler 4 of the slave lock 1', 1 is shortened against the side tumbler 4 of the general lock 1 by the same bounce and on the upper or lower arm 44, 45 whose direction was bounce and executed. By positions P1 to P5 are meant horizontal distances of a certain functional point 51 from the stop edge 23 of the key 2, 2 ', 2, which are always identical to the horizontal distances of the tumbler axes 311 from the stop edge 23 on the rotary core 3.

In the above examples, three variation waveforms 5, 511, 51Γ are described to understand the principle. 511 only for one side tumbler 4, at one position P4. Obviously, the number of variations of the variation groove 5, 511, 51Γ. 511 depends on the usable vertical dimension of the wider area of the key 2 and the amount of bounce a.

-5, 294056 B6 ·, <

The number of the side tumblers 4 depends on the number of positions P1 to P5 and on this, if the variation groove 5 is formed only on one or both flat sides of the key 2.

It is of course possible within the scope of the invention to provide such variation grooves 5, 511, 51Γ. 511 in master and slave keys 2, 2 ', 2, whose functional positions 51 are different at two or more positions P1 to P5. It is also possible to use side tumblers 4 for the first to nth slave cylinder locks V, 1, T, etc. whose length L is smaller than the chord length of the rotary core 3 and is the same for subsequent slave locks Τ ', Γ etc. only the lengths of the upper and lower arms 44, 45 vary.

Industrial applicability

The combination of a cylinder lock and a flat key is particularly useful for lock systems with master key and slave keys to control doors in office buildings, hotels, manufacturing plants, warehouses, etc., requiring high safety against overcoming.

Claims (4)

PATENT CLAIMS Combination of a cylindrical lock and a flat key, which has at least one wider surface a variation groove (5), the front part of which is provided with a leading extension (50) in the region of the key tip (2, 2 ', 2) to guide the lateral projection (41) of a side tumbler (4), wherein the vertical distance of the functional location (51) of the variation groove (5, 511,511 ', 511) from the guide spine (21) of the key (2, 2', 2) is at least one position P5) varies according to the distance from the stop edge (23) of the key (2, 2 ', 2), the side groove (41) of the side tumbler (4), which is guided in the guide shaft (31), protruding into the variation groove (5), whose longitudinal axis (311) is parallel to the longitudinal plane of the key channel (30) in the rotary core (3), which is housed in the cylinder lock housing (10) and is a side tumbler when the key (2) is inserted into the key channel (30) (4), through its b the eye protrusion (41) engaging the variation groove (5) is set to a position in which it is fully inserted into the rotary core (3) and thus allows it to rotate in the housing and the side tumbler (4) projects beyond an outer cylindrical surface of the rotary core (3) and engages an opposing locking recess (103) in the cylinder lock housing (10), characterized in that the variation groove (5, 511) of the master key (2) has at least one position (PI-P5) ) in one of its functional positions (51) controlling the positioning of the side tumbler (4), a vertical position which differs from the vertical position of the functional position (51) of the variation groove (5, 51Γ, 511) of the slave key (2 ', 2) same position (P1 to P5) by at least one dimensional offset (a), wherein the length (h, ha, 1, 1 — a) of at least one arm (44, 45) of the side tumbler (4) of the master lock (1, 1 ') , the collaborator mentioned The functional point (51) with its lateral projection (41) is at least one dimensional offset (a) greater than the length (ha, h-2a, 1-a, l-2a) of the corresponding side tumbler arm (44, 45) 4) a slave lock (Γ, 1), wherein at the side tumbler (4) of the slave lock (Γ, 1) it is shortened from the arms (44,45) from the side projection (41) in which the vertical bounce (a) is directed a function location (51) of the variation groove (5, 511 ', 511) of the slave key (2', 2) from the function location (51) of the variation groove (5, 511, 51Γ) of the parent key (2,2 '). Cylinder lock and flat key combination according to claim 1, characterized in that the length (L) of the side tumbler (4) of the master lock (1, 1 ') is greater by at least one dimensional offset (a) than the length (L ^ a, L-2a) of the slave lock side tumbler (4) (Γ, 1). -6GB 294056 B6 A cylinder lock and a flat key combination according to claim 1 or 2, characterized in that the variation grooves (5) are formed on both wider sides of the flat key (2). The cylinder lock and flat key combination according to claim 1 or 2 or 3, characterized in that the narrow side of the flat key (2) opposite its back (21) is provided with cutouts (22) cooperating with radial core pin tumblers. (33).