RU2584668C1 - Lever lock keyhole - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: proposed device comprises housing, cover installed outside the housing, safety plate covering body cavity, key holes coaxially arranged in housing, cover and safety plate. Protective elements are installed in housing cavity and made spring-loaded by springs with possibility of covering key hole of casing, free from key, and with open protective elements and open casing key hole with input of key. Protective elements are made in form of plates with opposite ends of rods, coaxial offset relative to longitudinal axis of plates and which are installed in slots made in housing. At least one rod for each plate is provided with ledge with hole. One end of spring is installed in hole of projection, and other one is installed on pin arranged protruding inside housing. Safety plate is installed on housing on side facing door.

EFFECT: device increases reliability of mechanism and complicate its disassembly and cracking.

4 cl, 8 dwg

Description

The invention relates to devices for closing keyholes of level locks and can be used to prevent dust and moisture from entering the lock mechanism, as well as to prevent unauthorized identification of the lock code.

A device for blocking a key well of a secret lock mechanism is known, which comprises rollers installed directly in the secret mechanism and spring-loaded in the direction to one another (US No. 5934121).

In this technical solution, the protective elements - rollers block the key well when the key is not in it. However, this technical solution has the following disadvantages. Since the rollers are located directly in the secret mechanism, this leads to its very complication. When trying to knock out the rollers, they can get inside the secret mechanism of the lock and cause it to break, and, therefore, to the subsequent emergency opening of the door, or the rollers can just jam, and to access the key well, it will be necessary to disassemble the secret mechanism.

The closest device is a key lock of a level lock containing a housing, a cover mounted on the outside of the housing, a safety strip covering the cavity of the housing, key wells coaxially made in the housing, in the cover and in the safety rail, security elements installed in the cavity of the housing made by spring-loaded springs with the possibility of blocking the key well of the casing, free from the key, and with the possibility of diluting the protective elements and opening the key well of the casing when entering the key, at m housing has means for securing it outside the door leaf (RU №2385401).

This device, due to the key lock in the form of an overlay, achieves a high degree of protection of the secret mechanism of the lock from exposure to foreign objects, aggressive substances, in particular, when trying to open the lock without a key with master keys and from unauthorized identification (probing) of the lock code, as well as from entering dirt and dust inside the secret mechanism of the lock despite the fact that the secret lever mechanism remains unchanged.

However, in this technical solution, rollers spring-loaded in the direction of one another are used as protective elements. The rollers are arranged in parallel in at least one key well. The cover is mounted on the housing with the possibility of its removal. At the same time, the safety strip is mounted on the case on latches, between it and the cover, and on the outside it covers the cavity of the case, which sharply reduces the reliability of the device as a whole from breaking through simple and quick disassembly of the entire mechanism outside the door leaf and subsequent identification of the lock code.

The problem solved by the invention is the improvement of technical and operational characteristics.

The technical result that is obtained by carrying out the claimed invention is to increase the reliability of the mechanism and the complexity of its disassembly and hacking.

To solve the problem with the achievement of the specified technical result in the well-known key lock of a lock containing a housing, a cover installed outside the housing, a safety strip covering the cavity of the housing, key wells coaxially made in the housing, in the cover and in the safety strip, protective elements installed in the cavity of the body, made by spring-loaded springs with the possibility of blocking the key hole of the body, free of key, and with the possibility of diluting the protective elements and digging the key hole of the body when entering the key, while the body has means for fixing it outside the door leaf, according to the invention, the protective elements are made in the form of plates provided with rods at opposite ends coaxial with respect to the longitudinal axis of the plates and installed in grooves made in the housing, at least one rod for each plate is provided with a protrusion with a hole, one end of the spring is installed in the hole of the protrusion, and the other is mounted on a pin placed protruding in spine of the housing, the safety bar mounted on the housing on the side facing the door leaf.

Additional embodiments of the device are possible, in which it is advisable that:

- Means for fixing the case outside the door leaf were self-tapping screws or screws;

- means for fixing the case outside the door leaf was a layer of glue;

- the safety strip was mounted on the housing by means of latches.

These advantages of the invention, as well as its features are explained using the implementation options with reference to the accompanying drawings.

FIG. 1 depicts an appearance of a claimed key lock assembly;

FIG. 2 is a longitudinal section through the device of FIG. one;

FIG. 3 is the same as FIG. 1, rear view with the safety bar removed;

FIG. 4-8 - individual parts in FIGS. 1, 2;

FIG. 4 - cover

FIG. 5 - case;

FIG. 6 - a safety level;

FIG. 7 - a protective element;

FIG. 8 - spring.

The key lock of a level lock (Fig. 1-3) contains a housing 1, a cover 2 mounted outside the housing 1, a safety strip 3 covering the cavity of the housing 1, key wells 4 coaxially made in the housing 1, in the cover 2 and in the safety strip 3. The protective elements 5 are installed in the cavity of the housing 1, made by spring-loaded springs 6 (for example, cylindrical) with the possibility of blocking the key hole 4 of the housing 1, free of key, and with the possibility of diluting the protective elements 5 and opening the key hole 4 of the housing 1 when entering the key. The housing 1 has means 7 (Fig. 3, 5) for fixing it outside the door leaf.

The protective elements 5 are made in the form of plates 8 (Fig. 2, 3, 7), equipped with rods 9 at the opposite ends (Fig. 3, 7), coaxial, offset from the longitudinal axis of the plates 8 and which are installed in the grooves 10 (Fig. 3 , 5) made in the housing 1. At least one rod 9 for each plate 8 is provided with a protrusion 11 with a hole (Fig. 7). One end of the spring 6 is installed in the hole of the protrusion 11, and the other is mounted on the pin 12 (Fig. 5 and 5B), placed protruding in the cavity of the housing 1. The safety strip 3 (Fig. 6) is mounted on the housing 1 (Fig. 2) from the side facing the door leaf.

Means 7 (Fig. 2) for fixing the case on the outside of the door leaf (not shown in Figs. 3, 5) can serve as self-tapping screws (for a wooden door leaf) or screws (for a metal door leaf) - holes 13 under them.

To further increase the reliability of the device from hacking, an adhesive layer, for example, epoxy or cyanoacrylate-based, can serve as means for securing the housing 1 outside the door leaf.

Since the safety strip 3 (Fig. 6) is installed on the housing 1 (Fig. 2) from the side facing the door leaf, it can be installed on the housing 1 without damage from breaking through latches 14 (Fig. 6) inserted into the corresponding grooves 15 (Fig. 3, 5).

The assembly of the key lock of the lever lock is as follows (Fig. 1-3).

In the grooves 10 of the housing 1 (Fig. 5), the rods 9 of the plates 8 are inserted (Fig. 7), and the springs 6 are installed in the corresponding holes of the protrusion 11. The other ends of the springs 6 are mounted on the pins 12 (Fig. 5), as shown in figures 2 and 3. The plates 8 are made and arranged by spring-loaded springs 6 so that in the closed state their lower edges of the rectangular part are closed along the horizontal axial line of the key well 4 without a gap. Then, from the side facing the door leaf, flush (flush) with the housing 1 on the latches 14 (Fig. 6), a safety plate 3 is installed, which is fixed in the grooves 15 under them (Fig. 3, 5). The safety plate 3 serves to prevent the loss of the plates 8 from the grooves 10 and the required reliable spatial location of the movable elements. The whole mechanism is fixed by means 7 outside the door leaf (with screws, screws, or a layer of glue). Next, a cover 2 is put on the outside of the housing 1, which can be made decorative. The cover 2 may have a corresponding flanging (Fig. 1-4) and is made removable.

The work of the key lock of the lever lock is as follows (Fig. 1-3).

Unlike the closest analogue, in which rollers are used, spring-loaded in the transverse direction, when entering a key or a foreign object (master key) to feel the code of a level lock, the rollers, turning around its axis and rising upwards, prevent the key or foreign object from being entered, as a result of which rapid wear of their working surface occurs due to a sufficiently large friction, and when a genuine key (not even a foreign object) is repeatedly inserted, they lose their cylindrical shape. As a result, a gap is formed between the rollers, which impairs the reliability of the mechanism from the point of view of preventing the ingress of dirt, dust and foreign objects into the secret lock mechanism. In addition, since the rollers have a cylindrical outer surface, it is quite easy for an attacker to determine the presence of protective elements 5 in the key of a level lock. In a well-known technical solution, an attacker can easily parse the entire mechanism, because the safety plate 3 in it is mounted on the latches on the outside of the door leaf between the body 1 and the cover 2. It is enough to remove the cover 2, remove the safety plate 3 by bending the latches 14 and removing them from the slots 15. The rollers are immediately removed (just falling out of the case one).

In the claimed device, plates 8 are used as protective elements 5, their flat surface is more difficult to detect for an attacker, he can only see a flat shutter in the key hole 4 of the level lock. In addition, the safety plate 3 is located on the side facing the door leaf (i.e., rests on its outer surface), therefore, it cannot be removed from the latches 14 or squeezed both inward and outward.

In contrast to rollers that wear out quickly, when a key is inserted into key wells 4 of cover 2 and body 1 in the claimed device, plates 8 open and move around the axis of rotation on rods 9 to 90 degrees inward with very little effort. When the key is fully withdrawn, the plates 8 are automatically returned to their original closed position by means of tension springs 6. Thus, in the claimed device, the plates 8 perform the function of self-closing shutters, which increases the reliability of the mechanism and its service life. And if a layer of glue serves as means for fixing the case 1 outside the door leaf, the attacker has practically no way to visually detect the installation of any lining on a level lock.

The most successfully declared Kluchevina of the level lock is industrially applicable for protecting level locks from drafts, dust and dirt getting inside the secret mechanism, as well as against unauthorized influences of foreign objects on the lock mechanism.

Claims (4)

1. Kluchevina lever lock containing a housing, a cover mounted on the outside of the housing, a safety strip covering the cavity of the housing, key wells coaxially made in the housing, in the cover and the safety strip, protective elements installed in the cavity of the housing, made with spring-loaded springs with the possibility of blocking the key hole of the casing, free from the key, and with the possibility of diluting the protective elements and opening the key well of the casing when entering the key, while the casing has means for fixing it outside the door leaf, characterized in that the protective elements are made in the form of plates equipped with rods at opposite ends, coaxial, offset from the longitudinal axis of the plates and which are installed in grooves made in the housing, at least one rod for each plate is provided with a protrusion with a hole, one end of the spring is installed in the hole of the protrusion, and the other is mounted on a pin placed protruding in the cavity of the housing, while the safety strip is mounted on the housing from the side, facing th to the door leaf. 2. Klyuchevina under item 1, characterized in that the means for securing the housing outside the door leaf are screws or screws. 3. Klyuchevina according to claim 1, characterized in that a layer of glue serves as means for fixing the case outside the door leaf. 4. Klyuchevina according to claim 1, characterized in that the safety strip is mounted on the housing by means of latches.

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