RU2756297C1 - Method for identification of lock key by decoder and lever lock based on it - Google Patents

Abstract

FIELD: locking devices.

SUBSTANCE: inventions relate to locking devices and can be used in door locks, safe locks to protect against unauthorized opening. The method for identifying the key of the lever lock is that when the key is turned in the keyhole, the levers are arranged in order and at heights, opening the entrance to the decoder plate into the grooves of the lever, allowing the decoder to turn on the axis and unlock the lock bolt. The method is implemented in a lever lock containing a decoder bolt locking device that prevents the lock from opening with master keys and self-dialing keys, simulating odd and even half-turns of the lock key. To avoid breaking the lock by reading the code between the locks, the heights of the code projections of the levers forming a passageway for the bolt stand can be reduced from one or the other side or simultaneously from both sides by one or more minimum values of the secret heights of the key bars, while the passageway for the rack is larger than it is minimally necessary. The length of the working surface and the number of locking teeth of the bolt interacting with the decoder can be reduced by half and allow only one full turn of the key.

EFFECT: proposed is new solution for a reliable locking device.

7 cl, 12 dwg

Description

Description of the invention

The invention relates to locking devices and can be used in door and safe lever locks.

The main essential feature of lever locks is the presence of a package of levers of various configurations interacting with the key and the bolt element of the lock. The method of identifying a key in a lever lock prevents most criminal attempts to open the lock using various devices instead of a key: master keys of various designs or self-set keys.

In the prior art, the main method for identifying the key is the key levers with the elements of the lock mechanism. The result is the creation of a passageway for the bolt retraction when unlocking the lock with your own key, or the bolt blocking when using the "wrong" key.

Known lever lock of increased secrecy according to the patent RU No. 2155846. In this lever lock, containing a housing with a guide for the key, a bolt bracket with bolts and a locking rack, means for locking the bolt, excluding a set of spring-loaded levers with code protrusions formed by notches for interaction with the locking rack and a double-bit wrench. The distance between the code protrusions of the leveler is the width of the channel for the passage of the locking post.

The method is based on the following algorithm of actions of the lock mechanism. When the key of this lock is turned, the beard of the key comes into contact with the spring-loaded levers and, overcoming the resistance of the springs, begins to lift them. When the angle of rotation of the key specified by the design of the lock is reached, the levers line up at heights in accordance with the heights of the cut secrets of the key bit. If the key to this lock is used, as a result of interaction, all levers are raised to heights at which their code protrusions are at the same level. The key is identified as original, the passage for the locking post is open. With a further turn, the key with its leash engages with the toothed rack of the bolt bracket with the bolts and pulls them into the lock body. A similar operation of the lock mechanism occurs with the remaining half-turns of the key. As a result of identification, the lock was opened (unlocked).

If a key is inserted into the lock, the heights of the cut secrets of the barbs of which do not coincide with the secret heights of the barbs of the key of this lock, then when the key is turned to the required angle, the levers will be at other heights. Accordingly, the code protrusions of the lever will be at different levels, the passage for the locking post will be closed. Further turning of this "wrong" key in the lock is impossible, the lock will not be opened.

However, a lock with this identification method has the following disadvantages. The lock allows criminal intelligent opening of the lock with master keys and self-typed keys. These "pseudo-keys" have their own algorithm of actions on the key identification mechanism. The identification mechanism algorithm is bypassed as follows.

1. Opening the lock with master keys.

In contrast to the algorithm of actions of a real key, when using the classic lock picks of the first generation, at first, one element of the lock pick - a "stretch" with one tooth, is applied to the bolt in the direction of pulling it into the lock body. The bolt post is pressed against the stop against the nearest upper code protrusion of the levers. Then, with another element of the master key in the form of an L-shaped hook at the end, by busting, by probing, they find the pressed leveler, raise it with a hook until the passage of this leveler is opened for the bolt post. This leveler remains hung with a coded protrusion on the counter. In the same way, the next clamped leveler is hung on the rack with a hook and then all the rest until the passage for the bolt rack is completely free. The principle of operation of the new generation lock pick is based on the combination of a classic hook and a tension on one line (tube in tube). This design allows you to bypass some of the lock protections that prevent the free entry of the tool into the key hole.

2. For criminal opening with self-typed keys, a different algorithm is used to influence the lock mechanism. In this case, with a self-tapping key with pins set to the maximum required height, all levers are raised to a height corresponding to the maximum height of the lock key bit. With repeated repetitive movements of turning the key until it stops, the levers against the bolt bar, the pin of the self-tapping key under the most clamped lever is upset. The lowering of the levers, corresponding to the upsetting of the pin, occurs before the passage for the bolt post is opened. After opening the passage, this levers cannot be pressed against the rack and the pin of the self-tapping key remains at the height of the lock key bit. Subsequent actions with the rest of the levers lead to the fact that all other pins of the self-tapping key are installed at the heights of the barbs of the original lock key. Upon further rotation of the self-dialing key with installed pins, the lock mechanism identifies it as a real lock key, the bolt is pulled into the lock body. Before performing the second half-turn, the self-tapping wrench is pulled out, the pins are re-installed to the required maximum height. Further manipulations with the self-dialing key are identical to those for the first half-turn. As a result of such actions, the lever lock is opened with a self-typing key.

The next method for identifying a key with a similar algorithm of the mechanism is implemented in a lever lock according to patent RU No. 2504632. This lock contains a body closed with a lid, a bolt with a thrust stand, levers, a rotary cylinder with a key groove and a driving gear wheel, devices: drive of a leash for movement deadbolt, drive of the pivoting roller of the release lever, drive of the cam for depressing the blocker. All drives have their own driven gears. In this lock, the contact of the key with the levers when the bolt is pulled in and vice versa occurs only to identify the key, expose the levers to free the passage to the bolt post. After setting the levers, the key comes out of contact with the levers and interacts only with the drives: a leash for moving the bolt, a pivoting roller for dumping the levers and a cam for depressing the blocker. If there is an original or identical key in the lock, then when turning with its beard, it comes into contact with the levers, raises them to the required height, determined by the secrets of the height of the key beard. The locking mechanism locks the levers in this position with an open passage for the bolt post.

Leaving contact with the levers, the key, with its further rotation, ensures that the leash of the bolt movement is rotated and the bolt is pulled into the lock body.

It should be noted that the main difference between this lock and other lever locks is the lack of springs in the lever. In the case of lever locks, after the cessation of the action of the key bit, the levers, under the action of their springs, return to their original position. This allows a burglar to perform multiple manipulations with master keys, a self-set key with the elements of the lock.

In this lock, when the “wrong” key is turned, it is lifted by the levers' beard, fixing them at the set heights and the beard coming out of contact with the levers. In this position, the levers are not aligned, due to the discrepancy between the heights of the beard of the "wrong" key and the heights of the beard of the original key, the passages of the levers are not lined up and the bolt post cannot be pulled into the lock body. In addition, the presence of a rotary cylinder and a wall of the lock excludes manipulations with the levers in order to line them up in the required position, which ensures the retraction of the bolt.

But a lock with this method of key identification has the following disadvantages:

- the constructive solution incorporated into the lock mechanism by the use of gear transmissions of the interaction of the parts of the mechanism, limits the length of the bolt exit to only one incomplete turn of the leash intended for moving the bolt. In this case, half of the travel angle of the leash is idle (without moving the bolt of the lock);

- an increase in the diameter of the cogwheel of the drive of the rotary driver in order to increase the length of the bolt exit leads to the need for a corresponding proportional increase in the diameter of the driving gear, the driven gear of the drive of the rotary roller, the driven gear of the cam drive, designed to push the blocker from the ends of the levers. This will lead to an increase in the overall dimensions of the lock, metal consumption, respectively, and the cost of the lock.

The closest analogue of the present invention is the key identification method used in the lock according to patent RU 2476657. In this lock, the privacy plates are retracted in the opposite direction from the key and are lowered, raised not by the key, but by the internal additional lock mechanism. The movement of the bolt in the process of opening, closing the lock is also performed not with a key, but by means of a mechanism. The key is inserted into the keyhole and rotated 90 degrees just to identify the inserted key. If the key is the "wrong" lock mechanism determines the discrepancy between the heights of the key locks to the original, returns 6 to the original position without moving the bolt of the lock.

The disadvantages of this lever lock are:

- the need for an additional mechanism for moving the bolt in the process of opening and closing the lock, leading to an increase in the material consumption of the lock;

- the complexity of the design of the lock, the presence of several intermediate mechanisms for transferring force to the bolt of the lock.

The aim of the present invention is to overcome the above-mentioned drawbacks of the prior art by providing a lever lock with a decoder. A decoder, in the general case, is a link that converts information from one appearance to another form used in some device (in our case, it converts the information of the rectilinear reciprocating motion of the grooves into a circular motion).

The claimed invention has the following essential features:

I. In the proposed method, when the key is turned in the keyhole 2, the levers 3 line up in order and at the heights, opening the entrance to the plate 10 of the decoder 8 into the slots 9 of the levers, which allows the decoder 8 to turn on the axis 11 and unlock the bolt 5 of the lock.

II. Devices:

1st device:

- the decoder 8 on the axis 11, has an interconnection with its plate 10 with the contact surfaces and grooves 9 of the lever 3, and the supporting surface 18 with the locking teeth 7 of the bolt 5, interacting with the decoder 8 at odd half-turns of the key when the lock is unlocked, and the spring or springs 14 ( hereinafter referred to as a spring) made of a material of circular or shaped cross-section with a stand 13. The fastening of the spring in the body of the decoder can be pinched in a slot or hole in the body of the decoder;

- decoder 8 can be made from one monolithic piece of material by mechanical and heat treatment, as well as from carved materials with different physical and mechanical properties. In particular, the cylindrical part can be pressed into a hole in the body of the decoder, and the decoder plate is attached to the body of the decoder by rivets, welding, glue, or fixed on the body of the decoder in other ways, including fastening with screws.

2nd device, characterized in that the spring 14 of the decoder 8 is plate (Fig. 12).

3rd device, characterized in that the axle 11 of the decoder 8 is made of hard or hardened steel or a carbide insert is inserted into the axle body.

4th device, characterized in that the heights of the code teeth (code protrusions) 17 of the security levers 3, forming the passage channel for the bolt post, are reduced from one side or the other, or simultaneously from both sides by one or more minimum values of the heights of the secrecy 23 barbs 21 key (fig. 7).

The 5th device, characterized in that there are locking teeth 7 on the bolt, interacting with the decoder 8 at even half-turns of the key when the lock is unlocked (Fig. 6).

The 6th device, characterized in that the length of the working surface and the number of locking teeth 7 of the bolt 5 interacting with the decoder 8 are two times less.

This achieves the technical result:

I. The proposed method of key identification provides double locking of the bolt post (with coded levers and a decoder), and also excludes criminal opening of the lock with master keys and self-typed keys.

II. Devices:

1st device:

- the lever lock, in addition to the main one, has a separate locking of the bolt by the decoder before the odd (1; 3) half-turns of the key in the direction of the bolt retraction into the lock body;

- manufacture of decoder elements from different materials with better mechanical properties, depending on the specific operating conditions, reduces the cost of processing, manufacturing and increases the service life;

- when two or more springs 14 are installed on the decoder, in the event of breakage or other damage to one of the decoder springs, the lock protection device by the decoder will remain operational (Fig. 11);

- when trying to open the lock with all kinds of master keys, the levers' grooves cannot be lined up with a self-typing key at the required height (this is possible only when the levers are lifted with the key of the lock); because of this, the rotation of the decoder is impossible, the bolt remains locked;

- loading of the bolt in the direction of opening leads to the fact that the supporting tooth of the bolt abuts against the supporting heel of the decoder, preventing the bolt post from contacting the teeth of the lever. This makes it impossible:

- fixation by means of the bolt rack of the bolt of the code protrusions, selectively lifted by the master key, to release the channel for the rack;

- upsetting the pins of the self-tapping key with repeated repeated movements due to their contact with the flanges of the levers and braking, clamping the levers by engaging the stand of the code protrusions of the levers.

All of the above excludes intelligent picking of the lock using master keys or self-dialing keys.

2nd device. With the same deflection angles of the leaf and round springs of the same material, the same cross-sectional area of the leaf springs, due to the small thickness, the tensile stress and rupture of the extreme, boundary layer of the spring material is less, respectively, the service life of the leaf springs is longer.

3rd device. Made of hard or hardened steel or with a carbide insert inserted into the body, the decoder shaft makes it difficult to drill it out in order to break the deadbolt by the decoder.

4th device. The discrepancy between the heights of the code protrusions of the levers and the true ones when measuring the heights of the protrusions with a probe by means of intersuvald penetration will not allow decoding the secrets of the key barbs. A dial key or another key made according to these measurements will ensure the opening of the channel for the bolt post, but will not line up the slots of the levers in a line and at the required height, the bolt will remain blocked by the decoder.

5th device. The lever lock mechanism blocks the bolt with a decoder when trying to imitate the execution of each half-turn of the lock key with master keys or a self-typing key in the direction of the bolt retraction into the lock body.

6th device. In this lock, its opening and closing is performed in one turn of the key. The lock has a smaller width, as a result, less material consumption, which is important for the manufacture of low-budget locks. For a lock, due to a 2-time decrease in the number of key revolutions per one closing or opening, the wear of the interacting structural elements of the lock decreases in an appropriate amount, and the service life of the lock increases. In addition, such locks can be built into paneled door leaves with a minimum horizontally limited space for installing the lock.

The description of the invention is facilitated with the aid of the accompanying drawings.

FIG. 1. General view of the mechanism of the proposed lock in the extended state of the bolt.

FIG. 2. Local section but AA.

FIG. 3. General view of the decoder.

FIG. 4. General view of the lock mechanism after the first half turn of the key.

FIG. 5. General view of the node of interaction of the decoder with the deadbolt.

FIG. 6. General view of the lock mechanism with locking teeth for interaction with the decoder at each half turn of the key.

FIG. 7. General view of the key barbs with a cruciform symmetry of the heights of the notches relative to the key shaft.

FIG. 8. General view of the key barbs with the symmetry of the heights of the notches relative to the key shaft.

FIG. 9. General view of the key barbs with the symmetry of the heights of the notches relative to the key shaft and the key drive tooth.

FIG. 10. General view of the lock, unlocked in one turn of the key.

FIG. 11. General view of a decoder with two springs.

FIG. 12. General view of a decoder with a leaf spring.

The essential features and the technical result of the invention are implemented in a device containing (Fig. 1) a lock body 1, with a keyhole 2 for a key, struts 16 for guiding the movement of the bolt 5 with a rack 4, drive teeth 6 and locking teeth 7, a lever 3 with code protrusions 17, forming the minimum required distance between them for the passage of the post 4, the code slots 9 to the springs 15, the support post 13 for supporting the spring 14 made of circular or shaped material and the springs 15, the axis 11 of rotation of the decoder 8 with the plate 10 and the spring 14, the housing cover 12, the spring 14 being attached to the decoder, the springs 15 on the levers. In the lower static position of the lever 3, the plate 10 with its edge 19 (Fig. 3) abuts against the working surfaces of the lever, preventing the rotation of the decoder 8 around the axis 11. It is important that at a given relative position of the lever and the decoder plate before the first and third (odd) half-turns of the key additional locking of the deadbolt.

The second device, characterized in that the spring 14 of the decoder 8 is lamellar.

The third device, characterized in that the axle 11 of the decoder 8 is made of hard and (or) hardened steel or a carbide insert is inserted into the axle body.

The fourth device, characterized in that the heights of the code protrusions 17 forming the passage channel for the bolt post 4 are reduced on one or the other side or simultaneously from both sides by one or more minimum values of the key bit secret heights and the passage channel for the post 4 is structurally larger the minimum required value.

The fifth device, characterized in that there are locking teeth 7 on the bolt, interacting with the decoder 8 at each half turn of the key. When you try to perform each half-turn for criminal opening of the lock with false keys (master keys, self-set key), the bolt is blocked by the interaction of its teeth 7 with the decoder 8 (Fig. 6).

The sixth device, characterized in that the working length of the bolt 5 with locking teeth 7 and drive teeth 6, interacting with the decoder 8 with the drive tooth 20 of the key is two times less and allows only one full turn of the key (Fig. 10). The operability of the device and its preservation with a long service life of the lock is ensured by the fact that:

1. Structurally, when turning the key and correspondingly raising the lever 3 to the required height, the alignment of the grooves 9 in the line for the entry of the decoder plate 10 and the formation of a passage between the code protrusions 17 of the lever for the bolt post 4 should occur simultaneously.

2. The friction force when pulling (lifting) the decoder support heel from the zone of engagement with the locking tooth of the deadbolt should be minimal. For this:

- the plane of the bearing platform of the locking tooth 7 of the bolt 5 should be parallel to the rolling axis 11 of the decoder 8;

- the perpendicular from the rolling axis of the decoder to the plane of the bearing platform of the locking tooth of the bolt must be on the line of intersection of this plane with the bolt face (Fig. 5);

- structurally, it is necessary to have a minimum gap between the locking tooth 7 of the bolt and the reference plane 18 of the decoder, excluding the appearance of friction force between them during the working movements of the rolling of the decoder.

3. With a mutually coordinated movement of the lever 3 and the plate 10 of the decoder:

- with the closed (locking) position of the decoder, the lower edge of the decoder body should be as close as possible to the horizontal surface of the bolt edge;

- the profiles of the grooves 9 on the levers and the geometric shapes of the decoder plate 10 should exclude jamming, stopping.

4. When the locking tooth 7 of the bolt contacts the supporting heel of the decoder 8 in the process of pulling the bolt into the body, the structure of the lock should provide a gap between the post 4 of the bolt 5 and the side surfaces of the code protrusions 17.

5. In devices (except for devices 5, 6), the distances between the locking teeth of the bolt should be structurally equal to the distance of movement of the bolt with a full turn of the key.

6. For minimum wear of the decoder interacting surfaces, the decoder spring action arm and the decoder spring compression force must provide the minimum pressing force of the decoder plate support heel to the levers interacting surfaces. The minimum of this force is limited by the need for guaranteed operation of the decoder.

7. In a lock with a deadbolt blocking by a decoder, at each half-turn of the key, the distances between the locking teeth 7 should be structurally equal to the distance of movement of the deadbolt 5 at each half-turn of the key.

8. For the operability of the 5th device, the interaction of the elements of the mechanism of the key bits - the lever - the decoder - the bolt

secrets of heights 23 barbs 21 keys should be located:

- when unilaterally opening the lock with a key - symmetrically to the axis of the key rod 22 (Fig. 8);

- in case of double-sided opening of the lock with a key - symmetrically to the axis of the key shaft and the drive tooth 20 of the key (double symmetry, Fig. 9).

The operation of the lock under normal operating conditions is as follows.

At the first half turn, the beard of the lock key begins to lift the levers. Since until the grooves 9 of the levers are not lined up, the entry of the plate 10 of the decoder into the grooves 9 of the levers is impossible. Therefore, the working surfaces of the levers slide along the contact edge 19 of the decoder plate 10.

With a further turn of the key at the moment of contact of the driving tooth 20 of the beard 21 with the driving tooth 6 of the bolt 5, the levers 3 will be lined up in the order and at the heights when:

- the passages between the code protrusions 17 of all levers are lined up, there are no obstacles to the movement of the bolt rack;

- the slots 9 of the levers are also lined up and at a height that provides the entrance of the decoder plate 10 into them. The plate 10 enters the slots 9 of the lever, the decoder 8 under the action of the spring 14 rotates on the axis 11, the support heel 18 of the decoder rises, removing the locking tooth 7 of the lock bolt from the lock. As the key continues to turn until the contact between the drive teeth of the key bit and the bolt stops, the bolt is pulled into the lock body, the levers and the decoder remain motionless. The angular sector of rotation of the key from the beginning of the contact of the driving tooth 20 of the beard 21 with the driving tooth 6 of the bolt 5 to its end is set during the design and manufacture of the lock (structurally).

At the moment of disengagement of the drive teeth of the key bit and the bolt, the key bit leaves the contact zone with the working flange of the levers, which ensures the stationary state of the levers. Further rotation of the key leads to lowering of the levers under the action of their springs. Suvalds begin to descend, press on the plate 10 of the decoder. This leads to the exit of the plate 10 from the grooves 9 with a corresponding rotation of the decoder 8 on its axis 11. The decoder 8, overcoming the resistance of the spring 14, is lowered to the bolt. By the end of the first half-turn, the bolt is pulled into the lock body by the distance between the bolt drive teeth 6, the lock mechanism is in the position indicated in FIG. 4.

At the second half-turn of the key, the movements of the lock lever are similar to their movement during the first half-turn of the key. But in the second half-turn, the levers are lifted by the second bit of the key, because of the difference in the combination of the heights of the beard secrets, the grooves 9 of the levers cannot be lined up at any angle of rotation of the key. Therefore, when lifting and lowering the lever 3, only the sliding of their working surfaces along the contact edge 19 of the plate 10 occurs, and the decoder 8 remains stationary. Since in the second half-turn there is no locking tooth in the area of contact with the bolt decoder v, the supporting heel of the decoder is not an obstacle to the bolt movement with the key. The operation of the lock mechanism for the remaining half-turns of the key is similar to the above.

The lock is locked in the reverse order and differs in that the lifting of the lever with the key starts from the other end of the rim, and the bolt extends.

When you try to open the lock with a master key, consisting of two hooks, including a master key with a combined axis of rotation of the hooks, the following occurs. When trying to pull the bolt with a hook in the direction of retraction, the locking tooth of the bolt rests on the supporting heel of the decoder. Due to the inability of the bolt to be drawn into the lock body, the bolt post cannot press against the side surface of the lever's code protrusions. Therefore, lifting any leveler with the second hook does not allow it to be hung on the ledge of this leveler, and by repeating this operation with other levers to free the passage for the bolt post. Suvald, when lifting and lowering the pick with a hook due to the impossibility of entering the decoder plate into the grooves (the grooves are not lined up and at the required height), with its working surface slides along the contact edge of the plate, the decoder is in a stationary state, the decoder support heel, which prevents the bolt from being retracted, remains in place.

Before explaining the counteraction of the proposed lock to an attempt to break it with a self-typed key, it is necessary to explain the process of intelligent breaking on other locks. Opening the lock with a self-typed key consists in matching the pins of this key to the code elements of the lever of the lock. Before starting, the key pins are set to the maximum height, which depends on the model of the lock being opened. After that, the self-dialing key is inserted into the keyhole and, with the start of turning with the pins, begins to raise the levers, comes into contact with its carrier (the key's drive tooth) with the corresponding drive tooth of the deadbolt. Levers, the code protrusions of which in this position do not interfere with the movement of the bolt post, are not clamped, and the corresponding key pins are not upset. With a further turn of the key, the bolt post is pressed against the code protrusions of the remaining levers, preventing their movement. The most clamped leverage stops, further multiple specific swinging movements of the key lead to the upsetting of the pin interacting with the given lever to the height of the secret of the true key. After that, due to the absence of an obstacle to the movement of the bolt rack, the upsetting of the pin under this lever stops. Then this process is repeated with all subsequent suvalds until the castle is opened.

In the case of an attempt to open the proposed lock with a self-tapping key, when turning the dial key, all levers are raised to the maximum height in accordance with the key pins. If the lock has a leveler with a security height corresponding to the maximum lift, then it will be with an open passage for the bolt post. But at this maximum lifting height, the passage grooves of the rest of the levers are in an inconsistent position (they are not on the same line and at the required height), therefore, turning the decoder and unlocking the bolt is excluded. Simultaneously with the lifting of the lever, the self-tapping wrench with its leash pulls the bolt towards the locking tooth 7 of the bolt to the stop against the support heel of the decoder 8. The decoder, resting on the locking tooth of the bolt, prevents the bolt from moving further to the stop of the rack 4 to the code protrusions 17 of the lever. Due to the lack of contact of the bolt post with the coded protrusions of the rest of the levers, it is impossible to upset the pins of the self-tapping key.

Therefore, due to the lack of resistance to the movement of the levers and the impossibility of blocking them, the repeated swinging movements of the key will only lead to the sliding of the working surfaces of the levers along the edge 19 of the plate 10 of the decoder without upsetting the pins of the self-typing key. The lock will not open.

For professional burglars, decoding of the key secret by measuring the heights of the code protrusions of the lever with a probe by means of intersuvald penetration remained available for almost all lever locks. For lever locks, the heights of the key barb secrets are in direct proportion to the heights of the code protrusions of the lever, which determine the width of the slot for the bolt post passage. This is a disadvantage of all methods of securing lever locks using this relationship.

In the variant of the proposed lock, the discrepancy between the heights of the code protrusions of the levers and the true ones when measuring the heights of the protrusions with a probe by means of intersuvald penetration will not allow decoding the secrets of the key barbs. A dial or other key made according to these measurements will open the passage in the levers for the bolt post, but will not line the levers grooves in a line and at the required height. The decoder will keep its blocking position, opening the lock will be excluded.

Claims (7)

1. A method for identifying a lock key by a decoder, which consists in aligning the levers in a mutually consistent position by turning the key, which opens the passage of the bolt post formed by the code protrusions of the levers, characterized in that when the key is turned in the keyhole on a structurally defined angular sector of rotation, the levers are aligned in the order and at heights, opening the entrance to the decoder plate into the lever slots, which allows the decoder, under the action of its spring, to turn on the axis and unlock the lock bolt. 2. A lever lock with a deadbolt blocking by a decoder for implementing the method according to claim 1, comprising a housing 1, a cover 12 with matching slots 2 in them for key insertion, located in the housing: a deadbolt 5 with a rack 4 rigidly mounted on it, which translational movement, code plates-levers 3 with code protrusions 17, having the possibility of reciprocating movement at an angle to the direction of movement of the bolt, characterized in that it additionally contains a decoder 8 with a plate 10, a spring or springs 14 made or made of material round or shaped section, the axis 11 of rotation of the decoder, the levers have additional code slots 9, while the decoder has the ability to interact with its support heel 18 with the locking teeth 7 of the bolt 5 at each odd half-turn of the key to unlock the lock, the plate 10 with the slots 9 of the levers 3. 3. Lever lock according to claim 2, characterized in that the spring 14 of the decoder 8 is lamellar. 4. Lever lock according to claim 2, characterized in that the axle 11 of the decoder 8 is made of solid and (or) hardened steel or a carbide insert is inserted into the axle body. 5. Lever lock according to claim 2, characterized in that the heights of the code protrusions 17 of the levers 3, forming the passage channel for the rack 4 of the bolt 5, are reduced on one or the other side or simultaneously from both sides by one or more minimum values of the heights of the secretion of the barbs 21 key, while the passage channel for the rack 4 is larger than the minimum necessary. 6. Lever lock according to claim 2, characterized in that the bolt has additional locking teeth 7 interacting with the decoder 8 at each even half-turn of the key to unlock the lock. 7. Lever lock according to claim 2, characterized in that the length of the working surface and the number of locking teeth 7 of the bolt 5 interacting with the decoder 8 is two times less and allows only one full turn of the key.

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