RU2692876C1 - Tamper-proof cylinder for locks - Google Patents

Abstract

FIELD: locks.

SUBSTANCE: lock-protected cylinder (1) for locks, comprising stator (2), in which there is a substantially cylindrical longitudinal cavity (3) for accommodating rotor (4) with longitudinal recess (5) for inserting key (6). Rotor (4) and stator (2) comprise multiple channels (7), which are substantially aligned with each other and face each other when cylinder (1) is in closed configuration. In channels 7 there are corresponding coding pins (8), driving pins (9) and, if necessary, resilient means (7a), tuned to prevent rotation of rotor (4) in stator (2) with no key (6) in longitudinal recess (5). At least one of driving pins (9) comprises rod (10) arranged with clearance with possibility of sliding in that part of channel (7), which is located in stator (2). Rod (10) has mushroom-shaped end (11) having a smaller diameter than rod (10). End (11) faces the corresponding coding pin (8) and is located next to it. At least one contour annular body (13) with diameter, which is substantially equal to diameter of channel (7), is put on mushroom-shaped end (11) with a gap.

EFFECT: disclosed is a lock cylinder for locks.

10 cl, 6 dwg

Description

The present invention relates to a tamper-proof lock cylinder, in particular, capable of preventing from tampering using master keys (which consists of selectively shifting the pins with a master key in order to free them from simultaneously) and / or so from the so-called impact hacking (which consists of tapping at least measure along part of such a cylinder).

At present, locks are known that contain a cylinder (into which the opening key is inserted) having a stator and a rotor connected to each other by a plurality of coding pins and driving pins that can slide in the rotor and stator channels; each stator channel faces the corresponding rotor channel and is aligned with it when the cylinder is in a closed configuration (the key is inserted or not inserted, but not turned relative to the configuration in which it is inserted).

Between the bottom of the stator channel and the bottom surface of the drive pin, an axially acting resilient element is set up to hold the drive pin at a distance from this bottom, prohibiting external actions that lower the drive pin (for example, inserting a key into the cylinder).

The key, due to its contour (coded) profile, acts on the upper surface of the coding pins, lowering them and precisely aligning the cutting line that separates the lower part of the coding pins and the top of the driving pins, with the cutting line, between the rotor and the stator, which are essentially disconnected ( when the key is inserted).

The rotor (when the key is inserted, therefore - with the coding pins, lowered in accordance with the encoding) can be rotated by turning the key head, which protrudes from the cylinder: thus, you can open the lock.

Breaking operations using a master key consist in permanently applying a mechanical moment (in the direction of rotation, which corresponds to opening) to the rotor, with the master key moving the coding pins so as to align the cut line between such coding pins and drive pins with an interface surface between the rotor and the stator, which will allow to turn the rotor of the cylinder and, accordingly, open the lock into which this cylinder is inserted.

Breaking with tapping involves constantly applying a mechanical moment (in the direction of rotation corresponding to opening) to the rotor using an uncoded key of the same type as the key corresponding to this cylinder (contoured by creating a sequence of grooves with a depth equal to or greater than the depth available on the original key) and in the rhythmic tapping on the head of such a key protruding from the cylinder with an object having a considerable mass. Tapping a substantial mass on the head of a key with an object leads to small and very fast movements of the key in the cylinder, followed by an impulsive collision of the inclined surface of each of the grooves with the head of the corresponding coding pin of the cylinder. Due to this tapping, the coding pin transfers the stored energy to the drive pin (since they are in contact with each other), which is shifted to the bottom of the stator channel, compressing the spring or other elastic means. If, due to a certain number of consecutive shocks, all the drive pins simultaneously are completely recessed into the corresponding stator channel, at this moment the rotor and stator are separated (the rotor can turn freely) and the torque applied to the key head at this moment will rotate the rotor and, therefore , to open the lock.

Both of the described variants of burglary can be made more difficult by using drive pins of an appropriate shape, which facilitates their misorientation and locking. In particular, drive pins are known that are formed by a rod having a diameter smaller than the diameter of the corresponding stator channel (the drive pin is inserted into the corresponding channel with a predetermined gap) and an enlarged head (for information, with a diameter / space occupied which is complementary to the diameter / space occupied stator channel).

In the described attempts to break in, the drive pins tend to bend relative to the channel in which they are located, due to the gap between their rods and the channels in which they are located. Such an inclination prevents the drive pin heads (which have the same diameter, the same occupied space as the channel) from being lowered into the channel, keeping the rotor locked relative to the stator.

In fact, repeated attempts at hacking with a master key and hacking by tapping after a certain time lead to a random alignment state, which allows the rotor to turn, which makes it possible to open the lock with which such a cylinder is connected.

Structures of a known type, despite their ability to prevent penetration into the cylinder, do not allow to prevent breaking, which leads to their inherent insecurity regarding breaking of cylinders of a known type.

The aim of the present invention is to solve the problem described above by creating a tamper-proof lock cylinder with high resistance to burglary.

For this purpose, the subject of the present invention is a tamper-proof lock cylinder that interferes with the master key and makes them ineffective.

Another object of the present invention is a tamper-proof lock cylinder that interferes with cracking by tapping and making them ineffective.

Another object of the present invention is a tamper-proof lock cylinder, which is inexpensive, relatively simple to manufacture, and safe to operate.

This goal and these and other items that will be more readily understood from the following description are implemented in a tamper-proof lock cylinder of the type containing a stator having a substantially cylindrical elongated cavity for installing a rotor with a longitudinal recess for inserting a key, the rotor and the stator contain multiple channels, essentially aligned with each other and facing each other when the cylinder is in a closed configuration, with the corresponding coding pins located in the channels, leading bottom pins and, if necessary, elastic means pre-configured to prevent rotor rotation in the stator in the absence of a key in a longitudinal recess, characterized in that at least one of the drive pins contains a rod inserted slidably with a gap into the corresponding channel in the stator, while the rod has a mushroom end having a smaller diameter than the rod, this end faces the corresponding coding pin and is located next to it, with at least one contour ring body, having e diameter substantially equal to the diameter of the channel, with a gap set at the end of the mushroom.

Other features and advantages of the invention will be better understood from the description of a preferable but not exclusive variant of a tamper-proof cylinder for locks of the present invention, shown as a non-limiting example in the attached drawings, where:

Figure 1 is a front view in cross section of a cylinder according to the present invention with a key inserted in the first opening step.

Figure 2 is a front view in cross section of the cylinder of figure 1 in a partially rotated locked configuration.

Figure 3 is a front view in cross section of the cylinder of figure 1 in an inactive configuration.

4 is a side view in cross section of the cylinder of figure 1 in an inactive configuration.

5 shows a cylinder of FIG. 1 on an enlarged scale in a locked configuration.

6 is a view of the cylinder in figure 5 on an enlarged scale.

The cylinder 1 comprises a stator 2 having a substantially cylindrical longitudinal cavity 3 for mounting the rotor 4.

The rotor 4, in turn, has a longitudinal recess 5, designed to receive the key 6. When the key 6 is inserted into the recess 5, it becomes possible to turn the rotor 4 relative to the stator 2, thereby opening the lock in which the cylinder 1 is installed.

The rotor 4 and the stator 2 comprise a plurality of channels 7, which are substantially aligned with each other and facing each other when the cylinder 1 is in a closed configuration.

Channels 7 have corresponding coding pins 8, drive pins 9 and, if necessary, elastic means 7a, tuned to prevent rotor 4 from rotating in stator 2 in the absence of key 6 in longitudinal recess 5.

According to the present invention, at least one drive pin 9 may comprise a rod 10 inserted slidably with a gap in the corresponding part of the channel 7 in the stator 2.

The gap between the rod 10 and the corresponding channel 7 is of such magnitude as to allow lateral movements of the rod 10 and its slight inclination.

Just for example, the diameter of the rod 10 can be from about half the diameter of the channel 7 to about 4/5 of the diameter of the channel 7.

In any case, it is not excluded the use of the diameters of the rod 10 with a different relationship to the diameter of the channel 7, in which the rod 10 is inserted (thereby determining a larger or smaller gap).

The rod 10 of the present invention has a mushroom-shaped end 11 having a smaller diameter than the diameter of the rod.

The end 11 faces the corresponding coding pin 8 and is located next to it, in particular, near the end face 12 of the coding pin.

According to the present invention, at least one contour ring body 13, the diameter of which is substantially equal to the diameter of the channel 7, is worn on the mushroom end 11 with a gap.

Mushroom end 11 may contain a rod 14 having a first diameter of 1/6 to 3/4 of the diameter of the channel 7, and surrounded by a head 15 having a second diameter of 1/5 to 5/6 of the diameter of the channel 7.

In the attached drawings, it can be seen that with such a constructional solution, shown in the drawings for example, the mushroom-shaped end 11 may be in the form of a screw head located on the corresponding drive pin 9 at its end.

Contour ring body 13 contains an internal through hole 16 having a diameter greater than the diameter of the rod 14 and smaller than the second diameter of the head 15.

In addition, the maximum diameter of the head 15 can also be advantageously smaller than the diameter of the through hole 16 of the contoured ring body 13, especially if the drive pin is made as a single piece containing the end 11. Thus, it is possible to easily put the contour ring body 13 on the drive pin 9 (in particular, at its end 11).

The contour ring body 13 can move relative to the mushroom-like end 11 (remaining in any case locked between the head 15 and the top of the drive pin 9). In particular, it can perform linear movements, being arranged in accordance with various possible deviations from the state of alignment and alignment, and turns, bending relative to the axis of the rod 14.

Obviously, the combination of linear movements and turns provides a much higher level of safety for cylinder 1 of the present invention, since, as will be understood from the present description, the ring body 13 can be locked between the rotor 4 and the stator 2 (in the case of burglary attempts) in accordance with unlimited number of different configurations, preventing the illegal opening of cylinder 1.

It is useful to indicate that the contour ring body 13 (worn with a predetermined gap on the rod 14 of the mushroom end 11) is locked between the head 15 at the top and the end of the rod 10 at the bottom.

The locking of the contour ring body 13 in this position is caused by the fact that it is clamped between the drive pin 9 and the coding pin 8 and is put on end 11.

Thus, in addition to providing the necessary protection against burglary, the mechanical stability of the entire cylinder 1 is also ensured, since the annular body 13 cannot accidentally get off the mushroom-shaped end 11.

The inner through hole 16 of the contour ring body 13 may, for convenience, comprise a first through hole 17, the diameter of which is complementary to the diameter of the head 15 (to prevent the annular body 13 from accidentally coming off the mushroom end 11) and the outer socket 18, which has a larger diameter than the head 15 ; The head 15 may temporarily be placed in such a socket 18.

The expression "the first through hole 17 has a diameter that is complementary to the diameter of the head 15" means that it has a size close to the diameter of the head; in essence, it may be slightly smaller, equal or slightly larger (for information, the diameter of the through hole 17 may correspond to the diameter of the head 15 plus minus 2 mm).

In addition, it is useful to note that the contour ring body 13 may have a predominantly external shape, which is preferably chosen from cylindrical, toroidal, barrel-shaped, truncated conical, prismatic, truncated pyramidal, partially teardrop-shaped, and their combinations.

Depending on the shape chosen, the ring body 13 performs different locking actions in the event of a hacking attempt.

A shape that has a curvilinear or rounded outer contour (for example, a toroidal, barrel-shaped, partially drop-shaped) contributes to the inclination of the inclined position (relative to the mushroom end 11) by the annular body 13, since the absence of edges facilitates the turning movement.

A cylindrical, truncated conical, prismatic, truncated pyramidal shape will more contribute to linear displacements to deduce from the coaxiality of the axis of symmetry of the body 13 and the axis of symmetry of the mushroom end 11.

Similarly, the drive pin 9 may have an external shape selected, preferably, from cylindrical, toroidal, barrel-shaped, truncated conical, prismatic, truncated pyramidal, partially drop-shaped, and their combinations. It is possible the use of other forms.

The annular body 13, depending on the shape chosen, also performs various locking actions in the case of burglary attempts and with respect to the drive pin 9.

A shape having a curvilinear or rounded outer contour (for example, a toroidal, barrel-shaped, partially drop-shaped) contributes to the inclination of the annular body 13 (relative to the mushroom-shaped end 11), since the absence of edges facilitates the turning movement.

Cylindrical, truncated conical, prismatic, truncated pyramidal, etc. the shape will be more prone to linear displacements, which bring the axis of symmetry of the body 13 and the axis of symmetry of the mushroom end 11 out of alignment.

In a particular embodiment of the structure providing protection against burglary, the number of contour ring bodies may be at least two, one above the other with a gap at the mushroom-shaped end 11.

The presence of a plurality of annular bodies 13 superimposed on each other allows the formation of a plurality of possible locking configurations that may occur during a hacking attempt, as a result of which the security of cylinder 1 is increased.

It should be noted that the contour ring bodies 13 stacked on top of one another may be the same or different.

In the second case, at least one contour ring body 13 may also comprise a recess for partially accommodating at least one part of at least one second contour ring body 13 so that they can also adopt a configuration for interconnecting (and optionally placing one in friend). The presence of such a recess in the first contour body 13 and the corresponding part in the second contour body 13 is in any case not necessary for the correct operation of the present invention. The contour bodies 13 may in fact have surfaces for abutting one another, being flat or shaped to be completely independent of each other.

It should be noted that the cylinder 1 of the present invention can meet very strict standards of protection when there are many (in particular, at least two) drive pins 9 having a stem 10 with a mushroom-shaped end 11 (having a smaller diameter than the stem 10) and at least one ring body 13 installed with a gap at the mushroom-shaped end 11. Such drive pins of the present invention can be effectively distributed along different channels 7.

The present invention works as follows.

If a particular key 6 is used, it can easily rotate the rotor 4 relative to the stator 2 of the cylinder 1.

If the attacker attempts to break the cylinder e of the present invention, the drive pin 9 with the mushroom end 11 locks

In particular, in the case of the use of a master key, the attacker applies a mechanical moment trying to turn the rotor 4 while simultaneously acting with a master key on the coding pins 8 to lower it out (aligning it with the cut line between the stator 2 and the rotor 4).

On the drive pin 9 with the mushroom-shaped end 11 and the ring body 13, the forced rotation of the rotor 4 causes the ring body 13 to move relative to the drive pin 9, on which it is mounted, which makes it impossible to further lower such drive pin 9 (as shown in FIG. 2, 5 and 6).

The annular body 13 actually abuts one of its surfaces into the longitudinal cavity 3, making it impossible to further lower the drive pin 9 in the corresponding channel 7.

Such a locked configuration of the ring body 13 (which prevents the rotor 4 from disengaging from the stator 2) can only be eliminated by stopping the application of mechanical torque to the rotor 4. However, this termination of the application of the mechanical torque leads to the fact that all encoding pins 8 (already installed in an open configuration the attacker using the master key returns to the inactive configuration, nullifying all the hacking steps already performed before.

A similar condition also arises in the case of a hacking attempt by tapping.

The application of the mechanical moment to the rotor 4 by a key that is encoded incorrectly, actually translates the ring body 13 into a configuration in which its part lies on the longitudinal cavity 3.

At this moment, even if repeated mechanical impacts on the key head (uncoded) cannot lead to the correct alignment of the drive pin of the present invention and, in particular, do not allow to release the annular body 13, part of which remains pressed to the internal cavity 3, the eye will not stop application of mechanical torque to the rotor 4.

In this case also, the termination of the application of the mechanical moment to the rotor 4 results in the return of all the coding pins 9 to the inactive position (nullifying the previously performed steps of hacking).

Advantageously, the present invention solves the problems described above, offers a tamper-proof cylinder 1 for locks, having a high degree of protection against hacking.

Cylinder 1 of the present invention makes it difficult and ineffective to attempt to break in by tapping.

The present invention makes it possible to create a relatively simple and inexpensive tamper-proof cylinder 1 for locks. Such characteristics guarantee the practical application of the present invention.

Various changes and substitutions may be made to the present invention, which are included in the scope of the applied formula. All parts can be replaced with other, technically equivalent elements.

In the examples shown, the individual characteristics given in connection with the specific examples may be replaced by other different characteristics that are present in other illustrative embodiments.

In practice, the materials used and the dimensions can be any in accordance with the requirements and the current level of technology.

When there are reference positions after the technical features mentioned in the claims, these reference positions are intended solely for better understanding and, accordingly, such reference positions do not have any limiting effect on the interpretation of any element designated for example by such positions.

Claims (10)

1. A tamper-proof lock cylinder of the type comprising a stator (2) with a substantially cylindrical longitudinal cavity (3) for accommodating a rotor (4) with a longitudinal groove (5) for inserting a key (6), with the rotor (4 ) and the stator (2) contain multiple channels (7), essentially aligned with each other and facing each other when the cylinder (1) is in a closed configuration, while the corresponding coding pins (8) are placed in the channels (7), drive pins (9) and, if necessary, elastic means (7a) that are configured to prevent rotation of the rotor (4) in the stator (2) in the absence of a key (6) in the longitudinal recess (5), characterized in that at least one of the drive pins (9) contains a rod (10) slidably with a gap in parts of the corresponding channel (7) in the stator (2), while the rod has a mushroom-shaped end (11) having a smaller diameter than the rod (10), with the end (11) facing the corresponding coding rod (8) and located next to it , and at the same time on the mushroom end (11) is worn with a gap at least one contour ring body (1 3) having a diameter substantially equal to the diameter of the channel (7). 2. A cylinder according to claim 1, characterized in that the mushroom-shaped end (11) comprises a rod (14) having a first diameter ranging from 1/6 to 3/4 of the channel diameter (7), surrounded by a head (15) having a second diameter ranging from 1/5 to 5/6 of the channel diameter (7). 3. The cylinder according to claim 1, characterized in that the contour annular body (13) contains an internal through hole (16), having a diameter greater than the first diameter of the rod, (14) and which is essentially complementary to the second diameter of the head (15) . 4. The cylinder according to claim 3, characterized in that the contour ring body (13) is worn with a gap on the rod (14) of the mushroom-shaped end (11) and is located between the head (15) located on top and the end of the rod (11) located below. 5. A cylinder according to one or more of the preceding claims, characterized in that the inner through hole (16) of the contour ring body (13) comprises a first through hole (17) having a diameter that is complementary to the diameter of the head (15) and an outer socket ( 18), having a diameter greater than the diameter of the head (15), and made with the possibility of temporary placement of this head (15). 6. A cylinder according to one or more of the preceding claims, characterized in that at least one component selected from the drive pin (9) and the contour ring body (13) has an external shape, preferably selected from a row comprising a cylindrical, toroidal, barrel-shaped, truncated conical, prismatic, truncated pyramidal, partially drop-shaped forms and their combinations. 7. A cylinder according to one or more of the preceding claims, characterized in that the mushroom-shaped end (11) is stacked one on top of the other and worn with at least two contour circular bodies (13). 8. The cylinder according to claim 7, characterized in that said contour annular bodies laid one on another (13) are identical. 9. The cylinder according to claim 7, characterized in that said contour ring bodies (13) laid one on another are different from each other, with at least one first contour ring body (13) containing a recess for partially accommodating at least one parts of one second contour ring body (13). 10. Cylinder in one or more of the preceding paragraphs, characterized in that the drive pins (9) having at least one rod (10) with a mushroom-shaped end (11) with a diameter smaller than the diameter of the rod (10), and at least one contour ring body (13), worn with a gap on the mushroom-shaped end (11), are at least two elements located in different channels (7).

Images