RU2650486C1 - Lock latch mechanism - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: latch mechanism of the lock includes a spring-loaded latch, levers in contact with the latch, a spring for levers put on the compound shaft of the levers, and a rod of square section. Each part of the integral shaft of the levers is provided with at least two protrusions that partially enclose the core of the square section with their inner faces, and contact each other with their side faces. Levers are installed so that they cover the protrusions and interact with one flat face with the end face of the protrusion, and the opposite face with the inner plane of the compound shaft of the levers.

EFFECT: increased reliability.

7 dwg

Description

The invention relates to hardware and relates, in particular, to locking devices with spring-loaded latches, used both on left-side and on right-side doors.

The known mechanism of the latch of the lock according to the patent of the Russian Federation No. 2265112, containing a spring-loaded latch, levers in contact with the latch, the return spring of the levers worn on the composite shaft of the levers, and a square rod.

The halves of the composite shaft of the levers respond to each other and with a rotation of 90 ° they are inserted into each other. At the same time, they are located on a square rod. To actuate the levers, they have additional elements in contact with the levers.

Such an execution has the following disadvantages:

- significant metal consumption of the lock latch mechanism, in particular metal consumption of the lever shaft;

- significant dimensions of the latch mechanism, since a return spring of the lever shaft with a large diameter is necessary, because the outer diameter of the lever shaft cannot be reduced — it is practically the circumscribed circle of the square on which the lever is mounted, and in turn, the size of the square cannot be reduced either, since it is practically described around a circle whose diameter enters the openings of the housing and the lock cover;

- the levers worn on the shaft are not fixed, and they can dangle, pop off and rotate on the shaft.

The technical result of the invention is to reduce the metal consumption and reduce the dimensions of the lock latch mechanism, in particular, to reduce the outer diameter of the composite shaft of the levers, which will make it possible to use the smallest return spring and, as a consequence, reduce the metal consumption, as well as eliminating the spontaneous jumping of the levers from the shaft.

The specified technical result is achieved in that the lock latch mechanism comprises a spring-loaded latch, levers in contact with the latch, a spring return levers worn on the composite shaft of the levers, and a square rod. Each part of the composite shaft of the levers is equipped with at least two protrusions, which partially cover the square cross-section with their inner faces, and contact each other with their side faces, the levers being set so that they surround the protrusions and interact with one flat face with the end face of the protrusion, and the opposite side with the inner plane of the composite shaft of the levers

The invention is illustrated by drawings, which depict:

FIG. 1 - general view of the mechanism;

FIG. 2 is a side view in section;

FIG. 3-7 - components of the shaft, in isometry.

The lock latch mechanism comprises a latch 1, its return spring of the latch 2, an emphasis of the spring 3, levers 4, which drive the latch. A composite shaft 6 of levers 4, spring-loaded with a return spring of 5 levers 4, is located on a square rod 7. Each part of the composite shaft 6 of levers 4 is equipped with at least two protrusions 8, which partially cover the square section 7 with their inner faces 9. 10 are in contact with each other. In connection, the protrusions 8 form a single unit in cross section. Moreover, the levers 4 are installed in such a way that they cover the protrusions 8, and with one flat face 11, the levers 4 interact with the end face 12 of the protrusion 8, and the opposite face 13 with the inner plane 14 of the composite shaft 6 of the levers, thereby preventing the levers from spontaneously jumping off the shaft .

Assembly of the mechanism.

The shaft 6 of the levers 4 is composite and during assembly, the levers are put on the components of the shaft from the inside and clamped by the protruding parts of the components of the shaft. The return spring 5 (it is also the return handle) is also inserted, like the levers, from the inside, from the inside of the lever shaft.

The operation of the mechanism is carried out in the usual way.

Claims (1)

A lock latch mechanism comprising a spring-loaded latch 1, levers 4 in contact with the latch, a return spring 5 of levers 4, worn on the composite shaft 6 of the levers 4, and a square rod 7, characterized in that each part of the composite shaft 6 of the levers 4 is provided with at least with two protrusions 8, which partially enclose a square cross-section rod 7 with their inner faces 9, and contact each other with their lateral faces 10, while the levers 4 are set so that they surround the protrusions 8 and interact with one flat face 11 with end face 12 of the protrusion 8, and the opposite side 13 with the inner plane 14 of the composite shaft of the levers 6.

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