CZ20014729A3 - Combination of cylinder-type lock and a flat key - Google Patents

Abstract

The invention relates to a cylinder-lock and flat-key combination for configuring locking systems comprising a primary master key (2) and subordinate keys (2', 2''). According to the invention, the primary master key (2) can be used to actuate all the locks of the given system and the subordinate keys (2', 2'') can only be used to operate a specific group of subordinate locks (1', 1'').

Description

The invention relates to a combination of a cylinder lock and a flat key to form lock systems with master-master and slave keys, where 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. With these systems, the slave keys can then be inserted into the "9" key. 9 the 9 key · 9 · 9 · 9 · 9 · 9 · 9 · 9 · 9 · 9 The key channels of the master locks, but due to the unlocking of all the radial pin tumblers due to 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.

German patent 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, which cooperate with spring-loaded tumblers, and in addition to the profile grooves and ribs on the broad sides of the key, variation groove. This additional variation groove is formed on one wider side of the key near its guiding ridge, starts 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 at least two spacing in the longitudinal direction 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 noses which, when the key is inserted into the key channel, move into the variation groove and according to its vertical course the lateral tumblers are vertically adjusted so that neither the upper and lower arm and did not interfere with opposite locking 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 cutouts on the lower narrow side of the key and cannot serve to distinguish between master and slave locks in lock systems with master-master and slave keys.

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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 claim 1, characterized in that the variation groove of the parent key has a vertical position at least in 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 on the same position by at least one dimensional rebound, wherein the length of at least one arm of the tumbler of the master lock cooperating with said function point by its lateral projection is greater by at least one dimensional rebound than the length of the corresponding arm the side tumbler of the slave lock, whereby the side tumbler of the slave lock is shortened from the shoulders from the side projection, in the direction of which the vertical distance of the functional position of the variation groove is revealed, the keys to the functional site of variation groove parent key.

Such a design is less expensive to manufacture than creating different key channel and key profiles for each slave lock group, and many more combinations and many more slave lock grades can be achieved compared to known prior art dream 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.

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

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 I (FIGS. 1a, 1b), a first slave lock i '(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 1,1', 1 consists of a housing 10 in which a rotary core 3 with a key channel 30 is received. a plurality of radial bores 101 are formed in the longitudinal plane of symmetry of the housing 10, in which are housed box pin tumblers 102 that abut the core pin tumblers 31 mounted in the radial bores 310 of the rotary core 3 and projecting into the key channel 30 with their ends it is provided with two rows of guide shafts 31 arranged vertically and parallel to the longitudinal in the plane of the key channel 30, the guide shafts 31 being arranged in the regions each between adjacent radial bores 310 for the core pin tumblers.33. In the guide shafts 31 there are slidingly mounted unsprung pin-shaped side tumblers 4, provided with side projections 41 for engaging the variation groove 5 of the flat key 2. On the side opposite the side projection 41, the side tumbler is provided with a guiding flag 42 housed in the guide slot 32 of the core 3. The housing prevents the side tumbler 4 from rotating around its longitudinal axis 311. Unlike the ends of the guide shafts 31 in the rotary core 3, in the basic locked position, a block recess 103 is formed in the housing 10 into which the ends of the side tumbler arms 44, 45 engage. 4 when the key 2 is inserted into the key channel 30 and if 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 31 and has a variation groove 5 on each of its wider sides. The front part of the variation groove 5 is provided with a lead-in The functional locations 51 of the variation groove 5 are those locations which, when the key 2 is fully inserted into the key channel 30, establishes the vertical position of the side pin 41 and thus of the side tumbler 4. In FIG. 1a, 2a, 3a, the intersection points of the axes 311 with the variation groove 5 are shown. As can be seen from FIG. 1a, which represents the master-lock 1 with the master-key 2 inserted, there is one functional position 51 of the variation groove 5 of the master-key 2 closest to the upper spine 21 as compared to the first slave key 2 'which is 2a is inserted into the first slave lock 1 '. Here the corresponding functional location 51 of the variation groove 5 is shifted by one

jump and vertically downwards - see Fig. 7. The second slave key 2, which is inserted into the second slave lock 12 in FIG. 3a, has a functional point 51 offset one bounce and downward relative to the first slave key 2 ' Referring to FIG. 1b, the 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 1. 2b, a first tumbler 4 of length LLa is assigned to the first slave lock 1 ', with a bounce a shortening of the lower arm 45 whose length is 1-a; the length h of the upper arm 44 remains unchanged. Referring to FIG. 3b, the second slave lock 1 is assigned a side tumbler 4 whose length L = L-2a, the lower arm 45 having a length of 1-2a being shortened by a step 2a; the length h of the upper arm 44 remains unchanged.

FIG. 4 shows a cross-section of the second slave cylinder lock 12 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 12 as in FIG. 3b but with the first slave key 2 ' shown in FIG. 2a. It is therefore the master key to this cylinder lock. 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 as in FIG. 1b but with the second slave key 2 inserted. It can be seen from the figure that the lower arm 45 of the side tumbler 4 extends into the locking recess 103 over two bumps. the second slave key 2 cannot be rotated.

In the above-described example 1 of the variation course of the variation groove 5 at the functional location 51 at position P4, the general variation groove 511 of the master key 2 was positioned closest to the spine 21, the first slave variation groove 511 'of the first slave key 2' bounce a and the second slave variation groove 511 of the second slave key has been shifted from the function location 51 of the master key 2 by two bounces and downwards and from the function location 51 of the first slave key 2j by one bounce and downwards. Schematic diagrams of the variation 1 of the variation groove 1 are shown in Fig. 7.

FIG. 8 schematically depicts a second variation course of the variation groove 5, wherein the functional location 51 of the general variation groove 511 is in the center, the first slave variation groove 511 'is shifted one offset and upwardly towards the spine 21 and the second slave variation groove 511 is offset from the function location 51 of the master key 2 by one step and down. Analogous to Figures 1b, 2b, 3b, Figures 8a-cross-sectional view of the function location 51 of the general lock 1 with the master key 2 inserted, Fig. 8b - the same cross-section of the first slave lock 1 'with the first slave key 2' inserted. 8c, the same cross-section of the second slave lock 1 with the second slave key 2 inserted. As can be seen from FIG. 8a, the length L of the side tumbler 4 of the general lock is equal to the length of its chord 3. As shown in FIG. 4 is shortened relative to the side tumbler 4 of the general lock 1 by the upper arm 44 by one bounce and the lower arm 45 is not shortened because the functional location 51 has shifted upward by a bounce a compared to the functional key of the general key 2. side tumbler 4 shortened by one step over side tumbler 4 of general lock 1 and both upper arm 44 and lower arm 45, 51 stu master key and a functional space 51 of the first slave key 2j shifted by one step and upwards and functional space 51 of the second subordinate key 2 is shifted by one step and down.

FIG. 9 schematically illustrates a variation of the course of the variation groove 5, wherein the functional location 51 of the general variation groove 511 is the lowest from the spine 21, the functional location 51 of the first subordinate variation groove 511 'is one offset and higher and functional location 51 the second sub-variation groove 511 is two bounces or higher from it. As can be seen from the cross-sections of such locks in Figs. 9a, 9b, 9c, in which the keys 2, 2 'are inserted. 2 of the corresponding steps, 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 of the first slave lock 1 '(FIG. 9b) has a shortened upper arm 44 by bounce a and L-L-a; 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.

It is evident from the examples that the functional location 51 of the variation groove 5 of each subsequent slave key 2 '. 2 is shifted vertically relative to the function key 51 of the master key 2 by at least one step up and down so that it does not overlap with the function location 51 of the variation groove 5 on the same position of the other key 2. 2 ', 2 and its slave lock side tumbler 4. 1, is shortened against the side tumbler 4 of the general lock 1 by the same bounce on the upper or lower arm 44, 45 in which direction the bounce was made. By position P1 to P5 is meant the horizontal distance of a certain function point 51 from the stop edge 23 of the key 2, 2 '. 2. which is always identical to the horizontal distance of the tumbler axis 311 from the stop edge on the rotary core 3.

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In the above examples, for understanding the principle, three variation variants of the variation groove 5 are described for only one side tumbler 4, per position P4. Obviously, the number of variations of the variation groove 5 depends on the usable vertical dimension of the wider key surface 2 and the bounce size a. Also, the number of positions P1 to P5 may vary and their maximum number is limited by the length of the rotary core 3. Number of side tumblers 4 is dependent on the number of positions P1 to P5 and on this, if the variation groove 5 is a pose on one or both flat sides of the key 2.

Within the scope of the invention, it is of course possible to form such variation grooves 5 in the 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 for the first to n-th slave cylinder lock Γ. Etc. The side tumblers 4 whose length L is less than the chord length of the rotary core 3a are the same for the subsequent slave lock Γ7 l'atd, 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)

Combination of a cylinder lock and a flat key having a variation groove on at least one wider surface thereof, the front portion of the key tip region being provided with a tapered extension for guiding the lateral tumbler protrusion, wherein the vertical distance of the variation groove from the guiding spine may vary a distance from the stop edge of the key, the side groove of the side tumbler extending into the variation groove, which is guided in a vertical shaft, the longitudinal axis of which is parallel to the longitudinal plane of the key channel in the rotary core which is housed in the cylinder lock housing; of the key channel, the side tumbler, by means of its side projection engaging in the variation groove, is set to a position in which it does not protrude beyond the outer cylindrical surface of the rotary core and thus allows its rotation The side tumbler protrudes over the outer cylindrical surface of the rotary core and engages the opposite locking recess in the cylindrical lock housing, characterized in that the variation groove (5) of the master key has at least one position (P1 to P5) in the housing. 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) of the slave key (2) on the same position (P1 to P5) by at least one dimensional step (a), wherein the length of the at least one arm (44, 45) of the side tumbler (4) of the master lock (1, Γ) cooperating with said function point (51) by its side projection (41) is at least one dimensional step (a) greater than the length of the corresponding arm (44, 45) of the side tumbler (4) of the slave lock (Γ, i), and the guide (4) of the slave lock (Γ, 1) is shortened from the arms (44, 45) from the lateral projection (41) in which the vertical bounce (a) of the function point (51) of the variation groove (5) of the slave key (2 ', 2) from the function location (51) of the variation groove (5) of the master key (2, 2'). Cylinder lock and flat key combination according to claim 1, characterized in that the length of the side tumbler (4) of the master lock (1, Γ) is greater by at least one dimensional offset (a) than the length of the side tumbler (4) of the slave lock (Γ). , 1). 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). Cylinder lock and flat key combination according to claim 1 or 2 or 3, characterized in that the narrower side of the flat key (2) opposite its back (21) is provided with cut-outs (22) cooperating with radial core pin tumblers (33) .