RU2360088C2 - Bit-key lock - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: lock contains a lid and a case with guiding slots for the key. The case is equipped with the stands, intended for directing movement of mobile elements of the lock. A plate with girth rails and, at least, one perpendicular rod is installed in the case. There is also a set of spring-driven against the case plates, with stands securing plane-parallel movement of the plates arranged in the slots therein. In each of the plates there is a graded slot with coded ledges and grooves. The lock is also equipped with a device interfering with unauthorised opening of the lock, made as a grooved protective plate, arranged parallel to the plates and spring-driven against the case; in the grooves of the plate there are stands securing its plane-parallel movement. Protective plate is equipped with a device interacting with, at least, one of the plates for mutual movement, and has a shaped form. It is usually T-shaped with a slot for the key.

EFFECT: locking of the slot, preventing its unauthorised opening with false keys.

4 cl, 3 dwg

Description

The invention relates to locking devices and can be used in overhead, mortise locks for doors of residential buildings, garages, safes, etc.

Known castle [RF Patent 2156342, MKI E05V 25/00, publ. 09/20/2000]. The lock has a housing, closed by a lid, with guides for the key and racks for moving the movable elements of the castle. A bolt bracket is mounted in the housing with bolts fixed to it and guide racks. Means of locking the bolt is a set of levers spring-loaded relative to the body with grooves for their movement and code ledges and notches. One of the crossbars is a valve made with the possibility of closing or opening the door from the side of the room.

As a prototype of the selected door lock [RF patent 2142544, publ. 12/10/99]. The lock contains racks located in the housing, designed to guide the movement of the moving elements of the castle. In the case there is a crossbar plate with rods and crossbars perpendicular to it, as well as levers spring-loaded relative to the body with step grooves with code recesses mounted on the racks of the crossbar plate with the possibility of fixing the position and movement when turning the key. The lock has a sleeve mounted on the housing to form a support for the key. In the housing is a spring-loaded actuating valve, made with the possibility of blocking the key hole. Thus, the lock has a security measure that partially prevents its unauthorized opening. Protection works as follows. When closing with a door shutter from the inside, at the same time, the shutter closes the keyhole, which prevents the lock from being opened. However, the design does not provide a means of protection that would not allow the lock to be opened with master keys when it is closed from the outside or closed from the inside, but not to the valve, since in this position the keyhole is open and there is the possibility of access to the levers.

The basis of the invention is the task of improving the reliability of the protection of the castle from unauthorized access.

The technical result achieved is the closure of the keyhole, which excludes the possibility of opening the lock with the help of master keys.

The claimed lock contains a cover and a housing with guide slots for the key. The housing is equipped with racks designed to guide the movement of the moving elements of the castle. A bolt plate with bolts and at least one rod perpendicular to it is installed in the housing. There is also a set of levers spring-loaded relative to the body, in the grooves of which are placed racks with the possibility of plane-parallel movement of the levers. Each levers have a stepped groove with code recesses and protrusions. The lock is also equipped with a means to prevent unauthorized opening of the lock, which is made in the form of a protective plate mounted parallel to the levers, spring-loaded relative to the housing and having grooves in which the racks are placed to enable its plane-parallel movement. The protective plate is provided with means for interacting with at least one of the levers for joint movement, and also has a curly, mainly T-shaped slot for inserting a key and ensuring plane-parallel movement of the protective plate when opening / closing the lock with a key.

Means for interacting with the levers can be made in the form of a protrusion oriented in the direction of the levers, or in the form of a rod, or in the form of strips made of a single workpiece with a protective plate, by bending its protruding part.

The protective plate may have a stepped groove with code recesses and protrusions.

The invention is illustrated by an example of a description of the implementation and the drawings, in which: FIG. 1 is a sectional view of a lock (schematically), FIG. 2 is a fragment of a cap with a slot for a key when the lock is open / closed, FIG. 3 is the same in an intermediate state during operation protection.

The lock has a box-shaped case 1. Rack 2 is installed inside the housing 1, at the ends of which there are holes for screw connection with the cover 3. In the cover 3 and the housing 1 there are guide slots 4, 5 for the key, while the slot 5 in the housing 1 is a supporting surface for the key stem. In the housing there is a figured crossbar plate 6 with a slot 7 for movement along the strut 2 and with the rod 8. Crossbars (not shown) are fixed on the crossbar plate 6.

In the housing there is a set of levers 9, spring-loaded relative to the housing 1 by means of springs 10. The levers 9 can be placed on both sides of the crossbar. In this case, two rods 8 are mounted on the plate, located coaxially on both sides of the plate. Two rods 8 can be replaced by one passing through the hole in the plate 6. In the levers 9, grooves 11 are made, through which the racks 2 pass and serve as guides for plane-parallel movement of the levers 9 in the direction perpendicular to the direction of movement of the bolt plate 6. In each levers also made a step groove with code recesses and protrusions forming a code maze (not shown).

An additional element of the lock is a protective plate 12, mounted on the side of the cover 3 parallel to the levers and spring-loaded relative to the housing 1 by means of a spring 13. The plate 12 has grooves 14 similar to grooves 11 of the levers 9. Racks 2 are placed in these grooves to enable its plane-parallel movement. The protective plate also has a figured, mainly T-shaped, slot for inserting a key and ensuring plane-parallel movement of the protective plate when opening and / or closing the lock with a key. This movement must be carried out in conjunction with at least one of the levers. To this end, the plate 12 is provided with any suitable means for interacting with the levers, such as a protrusion 15 or a plate, or a bar (shelf). These parts of the protective plate can be made of a single workpiece with a protective plate by bending its protruding part. The protective plate may have a stepped groove with code recesses and protrusions. In this case, it can perform an additional function, namely, the function of the code element, i.e. be another additional leverage, the so-called "cut-off levee".

The castle as a whole functions in a traditional way.

Starting position - the lock is closed, the crossbars are extended.

When the key is inserted into the guides 4, 5, its beard with its secrets acts on the edge of the levers, moving them in the transverse direction relative to the crossbars, using the racks as guides. In this case, the springs are compressed and the longitudinal channel of the code labyrinth for the rods is opened 8. When the key is turned, its beards also act on the protrusions of the gear rack of the bolt plate, and it translates, because the protrusions of the code labyrinth do not impede the longitudinal movement of the rods 8. When the bolt plate is moved, the bolts slide in and the lock opens. The return of the levers to their original position is carried out under the action of springs.

Locking is carried out in the reverse order.

In this case, simultaneously with the movement of the suvald, a parallel-parallel movement of the protective plate is carried out, since its protrusion 15 (a bent rod, strap) is engaged with the edge of one or more levers. The movement of the protective plate is carried out similarly to the movement of the levers described above. In this case, the T-shaped slot for inserting the key provides unimpeded movement of the plate when turning the key, because the slot moves along with the plate along the stem of the inserted key with its “base” (part oriented along the direction of movement). In this case, the plate overlaps part of the slot 4 for the key on the lid of the lock, namely the part that is designed to enter the key beard (on both sides of the hole for the key stem). This is what prevents the possibility of unauthorized opening of the castle.

This is explained by the following. In case of unauthorized opening of a regular level lock with the help of probes, one of them acts on the bolt plate, the other, inserted into the key hole for the beard, alternately acts on the levers. After certain manipulations, the lock can be opened. When using the described protective plate, this possibility is excluded, since the plate overlaps the notches for the key beard into which the probes are inserted.

Claims (4)

1. A lock containing a cover and a housing with guide slots for the key, the housing is equipped with racks designed to guide the movement of the movable elements of the lock, a bolt plate with bolts and at least one rod perpendicular to it is installed in the housing, there is also a set of spring-loaded relative to the housing the levers, in the grooves of which the racks are placed to ensure the possibility of plane-parallel movement of the levers, in each levers there is a stepped groove with code recesses and protrusions, the lock is also equipped means preventing the unauthorized opening of the lock, characterized in that the said means is made in the form of a protective plate mounted parallel to the levers and spring-loaded relative to the housing and having grooves in which the racks are placed to enable its plane-parallel movement, the protective plate is equipped with a means for interaction, at least at least with one of the levers for joint movement, and also has a curly, mainly T-shaped, slot for inserting a key and ensuring a flat the parallel movement of the protective plate when opening / closing the lock with a key. 2. The lock according to claim 1, characterized in that the means for interacting with the levers are made in the form of a protrusion oriented towards the levers. 3. The lock according to claim 1, characterized in that the means for interacting with the levers made in the form of a rod or strap made of a single workpiece with a protective plate by bending its protruding part. 4. The lock according to any one of claims 1 to 3, characterized in that the protective plate has a stepped groove with code recesses and protrusions.

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