RU2174176C1 - Door lock - Google Patents

Abstract

FIELD: ironmongery. SUBSTANCE: door lock has body accommodating cross-bar plate with spindles and support, spring-loaded pins engageable with cross-bar through mentioned support, latch plate mounting spindles and spring, bolt plate with spindles and clamp engaging two links made for synchronous displacement in one plane and in opposite directions; spindles engageable with door block are fastened to links, one link is engageable with bolt plate, other one, with bolt and cross-bar. Door lock is provided with lever engaging latch plate, cam with clamp engaging bolt plate, and key with code combination. Bolt plate clamp has its loosening member; cam has rod passed through it as well as internal and external lock-handles; rod is coupled with both lockhandles; link connected to clamp plate and cross-bar is spring-loaded. EFFECT: improved breaking resistance. 5 cl, 8 dwg

Description

 The invention relates to locks and can be used to lock safes, residential and office buildings, as well as garages and other objects of private and state significance.

 Known door lock (ed. Certificate N 370329, MKI E 05 B 21/02, 1973), comprising a housing in which spring levers are located, having grooves for interacting with a locking stand associated with the key deadbolt, and a key with a beard, and the locking stand is made in steps, the levers are the same size, and the key beard has a profile that matches the profile of the locking rack.

 The disadvantages of this lock are low privacy and low reliability.

 Known door lock (certificate RU for utility model N 0002829 MKI E 05 B 21/02), comprising a housing in which there is a bolt plate with two fingers and a square rack, spring-loaded levers interacting with the bolt through a square rack, the latch plate with fixed on with a finger and a spring, a bolt plate with three fingers and a latch that engages with rods, a lever, a cam with a latch, and a key with a code combination.

 In all standard modes, the normal operation of the lock is ensured by equal strength elements of the lock, such as locks. However, if you try to break the lock due to the equal strength of its elements, the cam latch interacting with the bolt plate or the bolt plate latch interacting with the rods may break, which will lead to the inability to open the door even when the owner removes the lower rod lock held by the latch from moving the plate bolt with three fingers. As a result, the landlord will require large material costs to open the door (especially metal).

 The present invention is based on the task of developing a door lock that, by reducing the strength of individual elements of the lock, can break it during mechanical breaking, preventing unauthorized entry into the room, while maintaining the health of the remaining elements of the lock, which allows to increase the degree of protection of the room from the penetration of the cracker, ensuring simple operations to open the castle by the owner.

 The problem is solved in that in the door lock containing the housing in which the bolt plate with the fingers and the strut is placed, the spring levers interacting with the bolt through the specified strut, the latch plate with the finger and spring attached to it, the bolt plate with the fingers and the latch, meshing with two rods, which are made with the possibility of synchronous movement in the same plane in opposite directions and on which are fixed the fingers interacting with the door unit, while one rod in interacts with the bolt plate, and the other with the bolt and bolt, the lever engaged with the latch plate, a cam with a lock engaged with the bolt plate, and with a rod passing through the cam and the outer and inner lock handles and associated with them , and a key with a code combination, according to the invention, the bolt plate retainer has an element of its weakening, while the thrust associated with the bolt plate and the bolt is spring-loaded. An element for loosening said latch may be a groove made on its outer surface at the place of attachment to the bolt plate.

 According to the invention, it is proposed to loosen the latch, which is fixed on the bolt plate and moves (raises) the blocked lower link by performing an additional groove on its surface and installing a spring on the lower link, which enables the lower link to lift after removing its lock. Due to this, when breaking the lock, the weakened latch breaks, while all other elements of the lock remain operational, the spring-loaded rod remains locked, and the door is closed.

 The problem is also solved by the fact that in the door lock containing the housing in which the bolt plate with the fingers and the strut is located, the spring levers interacting with the bolt through the specified strut, the latch plate with the finger and spring fixed to it, the bolt plate with the fingers and the latch meshing with two rods, which are arranged to synchronously move in the same plane in opposite directions and on which are fixed the fingers interacting with the door unit, while one the thrust interacts with the bolt plate, and the other interacts with the bolt and bolt, the lever engaged with the latch plate, the cam with the lock engaged with the bolt plate, and with the rod passing through the cam and the outer and inner lock handles and connected with them, and a key with a code combination, according to the invention, the cam shaft has an annular groove made in its portion located between the outer handle of the lock and the cam.

 When breaking the lock, the rod is twisted in the groove, and all other elements of the lock remain fully functional, and the door is closed.

 It is advisable that the door lock would additionally contain a device for locking it, mounted on the inner surface of the door. In one embodiment of the locking device, it comprises a cover fixed to the inner surface of the door, an insert fixed to the internal handle of the lock and provided with a flange at its free end, a plate located between the insert flange and the surface of the cover facing it and engaged with an insert, and a cam fixed to the plate with a latch interacting with the plate. The device for locking the lock may also include an insert fixed by an insert in the lock case, and a spring attached to the insert for fixing it in two positions when the insert is rotated. Latch lock is recommended for overhead lock options, and for mortise options it is more advisable to lock in an overlay.

In the future, the invention is illustrated by a specific example of its implementation and the accompanying drawings, in which:
FIG. 1 shows a main view of a door lock according to the invention;
FIG. 2 is a section along AA in FIG. 1;
FIG. 3 is a section along BB in FIG. 1;
FIG. 4 - the handle of the lock with a weakened rod;
FIG. 5 and 6 — one embodiment of a device for locking a lock;
FIG. 7 is another embodiment of a device for locking a lock;
FIG. 8 is a section GG in FIG. 7.

 The design of the lock in the accompanying drawings is presented in the "open" position.

 The door lock according to the invention comprises a housing 1 (Fig. 1, 2) with a cover 2, in which there is a plate of the crossbar 3 with two fingers 4 and a square rack 5, spring-loaded levers 6, interacting with the crossbar 3 through the rack 5. In the housing 1 are also placed a latch plate 7 with a finger 8 and a spring 9 fixed thereon, a bolt plate 10 with three fingers 11 and a latch 12 engaged with two rods 13 and 14, which are arranged to synchronously move in the same plane in opposite directions and on which are fixed pal 15 and 16, respectively, interacting with a door unit (not shown). The rod 13 interacts with the bolt plate 10, and the rod 14 is equipped with a spring 17 and interacts with the bolt 10 and the deadbolt 3. The lock also has a lever 18, which is fitted at one end with the end 19, and with its other end engages with the protrusion of the latch plate 7 , a cam 20 with a latch 21 engaged with the bolt plate 10, and a key 22 (FIG. 2) with a code combination.

 The latch 12 (FIG. 3) is provided with an element for loosening it, which, as shown, for example, in FIG. 3 can be made in the form of an annular groove 23 made on its outer surface in the area of its attachment to the bolt plate 10. However, other embodiments of the element for loosening the retainer are obvious, for example, in the form of a half-hollow rivet or a transverse groove.

 An element for loosening can be provided with a rod 24 (Fig. 4) passing through the cam 20 and the outer handle 25 of the lock and associated with them. An annular groove 26 made between the outer handle 25 and the cam 20 serves as such an element. However, other options for loosening the shaft are obvious, for example, in the form of one or two transverse grooves.

 The lock may be provided with a device for locking it, containing, for example, an insert 27 (Fig. 5) with flats 28, which is fixed in the inner handle 29 with a figured hole. At the free end of the insert 27 there is a flange 30 that holds it and the handle 29 from turning. A cover plate 31 is fixed on the inner surface of the door, while between the flange 30 and the surface of the cover plate 31 facing it there is a plate 32 with two holes 33 connected by a groove 34 (Fig. 6). The device also includes a latch 35, which is mounted eccentrically on the cam 36 and engages with the plate 32, and a handle 37 connected to the cam 36 with the possibility of rotation.

 In FIG. 7-8 shows another embodiment of a device for locking a lock, comprising an insert 38 fixed by means of an insert 39 in the housing 1 of the lock with the possibility of its fixation by rotation in two positions by a spring 40.

 The proposed door lock operates as follows.

 In the open position of the lock, the finger 8 engages with the locking plate of the door unit. Opening the door from the outside is carried out by turning the cam 20 counterclockwise, in which the latch plate 7 is moved by the lever 18.

 In the open position, the lock from the inside can be locked either by turning the insert 39 with the insert 38 clockwise, or by moving the plate 32 to the upper position with the lock 35 while turning the handle 37 counterclockwise, in which the insert 27 cannot be rotated with the handle 29. Insert 38 in one from its positions, it blocks the movement of finger 8, and in the other, it does not interfere with the movement of this finger.

 In the closed position, the fingers 4, 11 (Fig. 1) and the fingers 15, 16 engage with the locking plate of the door block and are blocked from moving by the protrusion of the interference 14. To close the door from the outside, rotate the cam 20 clockwise, while the plate moves the bolt 10 and the rods 13 and 14 with the fingers 15, 16 fixed to them, after which the bolt plate 3 is moved using the key 22 with a code combination, while the protrusion of the rod 14 is blocked. In addition, in the closed position, when the handle 37 is turned inside the apartment counterclockwise, the latch 35 raises the plate 32 to the upper position, while its groove engages with the flat 28 of the insert 27, blocks the handle 29 from turning and prevents the lock bolt plate 10 from moving the lock, at the same time, the key hole in the cover plate 31 is blocked. Thus, this device allows to block the movement of the bolt plate from the inside without locking the lock by the bolt plate.

 When breaking the lock on the outside of the door (turning the cam 20 counterclockwise), the loosened lock 12 (Fig. 3) will break, fingers 4 of the bolt plate 3 and finger 16 connected to the locked rod 14 will remain engaged with the door block and the door will not open . After the owner removes the lock of the lower link 14 (key 20) under the action of the additional spring 17, the lower link 14 will rise up, and the upper link 13 will fall down under its own weight. When the cam 20 is rotated, the bolt plates and latches 10 and 7 will move to the extreme left position and the door will open, after which a broken latch 12 will need to be replaced.

 If there is a lining 31 (Fig. 6) for additional blocking, when turning the handle, the weakened rod 24 will break (Fig. 3), while all the elements of the lock will remain in the closed position and the door will be closed. After the owner removes the lock on the protrusion of the lower rod 14 (key 22) by turning the handle counterclockwise due to the friction of the two parts of the rod 24, the rods 13 and 14, the bolt plates and the latches 10 and 7 move and the door opens. If the door cannot be opened due to friction of the parts of the core, then simple work will be required: removing the handle, and then replacing the broken core.

 The proposed lock with a weakened lock or with a weakened shaft provides all the technical requirements for operability and operation in accordance with GOST for locks and latches. The attenuation parameters of the lock are selected so that when they break, the operability of the remaining elements of the lock is not violated. Thus, the use of the proposed castle will significantly protect the owner of the apartment from the penetration of the burglar.

Claims (5)

 1. A door lock comprising a housing in which a bolt plate with fingers and a strut is placed, spring-loaded levers interacting with the bolt through the strut, a latch plate with a finger and a spring fixed to it, a bolt plate with fingers and a latch engaged with two rods that are made with the possibility of synchronous movement in the same plane in opposite directions and on which are fixed the fingers interacting with the door block, while one rod interacts with the bolt plate, and d the other with a bolt and a bolt, a lever that engages with the latch plate, a cam with a latch that engages with the bolt plate, and a key with a code combination, characterized in that the bolt plate latch has an element for its weakening, the cam has a shaft passing through it, both the outer and inner handles of the lock and associated with them, while the thrust associated with the bolt plate and the bolt is spring-loaded.  2. The lock according to claim 1, characterized in that the element for loosening said latch is a groove made on its outer surface in the place of attachment to the bolt plate.  3. The castle in paragraphs. 1 or 2, characterized in that it further comprises a device for locking it, mounted on the inner surface of the door.  4. The lock according to claim 3, characterized in that the device for locking it comprises a pad fixed on the inner surface of the door, an insert fixed in the inner handle of the lock and provided with a flange at its free end, a plate located between the flange of the insert and facing it the surface of the lining and meshing with the insert, and a cam fixed to the plate with a latch interacting with the plate.  5. The lock according to claim 3, characterized in that the device for locking it comprises an insert fixed by an insert in the lock case, and a spring fixed to the insert for fixing it in two positions when the insert is rotated.

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