RU172113U1 - Door latch for a metal door - Google Patents

Abstract

A door latch for a metal door is proposed, comprising a housing with a strap, a spring-loaded tongue with a shank and a handle lever with an opening for the drive shaft installed in the housing. The housing is equipped with two parallel ears located on the housing from the side opposite the strip and protruding beyond the dimensions of the internal cavity of the housing in the direction transverse from the axis of the tongue of the tongue, the ears have openings on the same axis to accommodate the drive shaft of the handles, and the end is placed between the ears handle lever with hole for handle drive shaft. 1 s.p. f-ly, 4 ill.

Description

The utility model relates to means for locking shutters, mainly doors and windows, and can be used in the construction and repair of premises for residential and industrial purposes, especially when installing metal doors.

Latches, as a rule, can be used on wooden doors and on metal or "entrance" doors.

The latches used on wooden doors are mainly small, the maximum reach of the beveled crossbar or “tongue” is small, but a large angle of rotation of the handle is necessary, since in the small dimensions of the latch housing it is quite difficult to realize the rotation of the handle by a small angle of rotation of the handle. The spring returning the handle to its original position after pressing, as a rule, is absent, therefore, if there is no return spring in the push handles themselves, then such latches cannot be used, because the pens will be constantly sagging.

The latches used on metal doors ("entrance"), as a rule, have a more powerful case, made either on the basis of the lock case or made in the form of a stripped down lock case, where the "tongue" and the entire mechanism for pulling the "tongue" through the rotary shaft of the handle . In practice, this is a latch lock, where there is no deadbolt with a drive and there is no privacy mechanism. The disadvantages when using this design are that when installing in the door, it is necessary to prepare a hole in the end of the door corresponding to the rectangular case of the latch, which is not easy in the absence of the necessary special equipment and equipment. Such a latch has a very high metal content, as it has a large-sized case, the cavity of which is not used optimally by 100%, and the latch bar has increased dimensions due to the enlarged case.

In the patent of the Russian Federation 2360089 an attempt was made to optimize the above disadvantages. However, they were not resolved to the end. The body of the known latch has a truncated shape, which somewhat reduces the intensity of the latch. However, as before, the handle lever and its shaft are located inside the case and therefore it is still necessary to prepare a large hole for the latch case, which makes it difficult to install the latch in the door.

The technical result is that the design of the proposed latch simplifies its installation in a metal door. It is enough to drill a round hole in the end of the metal door and insert the latch body into the cavity of the door with a certain turn. At the same time, the metal consumption of the latch is reduced.

The specified technical result is achieved in that the latch contains a housing with a strap, a spring-loaded tab with a shank and a handle lever with an opening for the drive shaft installed in the housing. The housing is equipped with two parallel ears located on the housing from the side opposite the strip and protruding beyond the dimensions of the internal cavity of the housing in the direction transverse from the axis of the tongue of the tongue, the ears have openings on the same axis to accommodate the drive shaft of the handles, and the end is placed between the ears handle lever with hole for handle drive shaft.

The latch housing is made in the form of a pipe segment.

The utility model is illustrated by drawings in which

FIG. 1 is a general view in isometry;

FIG. 2 - a general view in section, the tongue is extended;

FIG. 3 is a view A of FIG. 2;

FIG. 4 is a General view in section, the tab is pulled into the housing.

The latch consists of a housing 1 with a strap 2.

The latch housing 1 is made in the form of a pipe, which can be bent from one sheet and welded to the bar. The housing can also be made of two bent parts and is also welded to the bar. The pipe in this case can have a different shape - round, square, rectangular, stepped, etc.

A tongue 3 with a shank of a tongue 4 is installed in the housing.

The shank 4 of the tongue 3 can be made of metal sheet by cutting and stamping with the necessary rigidity and shape. The shank 4 can be welded or attached to the tongue 3.

In the housing there is a return spring 5 of the tongue 3, a lever of the handle 6 with a spring 7 of its return, an emphasis 8 of the return spring of the tongue.

The lever of the handle 6 is made flat of a steel sheet and may not have such an expensive part as the lever shaft, which is attached to the lever and is the axis of rotation of the lever.

The spring 7 return lever arm is made as a tension spring cylindrical, one end of which has means of attachment to the stop 8 of the spring return tongue, and the other end has means of attachment to the lever of the handle 6.

The housing 1 is equipped with two parallel ears 9 located on the end of the housing 1 from the side opposite to the strip 2 and protruding beyond the dimensions of the internal cavity of the housing 1 in the direction transverse from the axis of the shank 4 of the tongue 3.

The ears 9 are equipped with holes 11 located on the same axis 10 for placement of the handle drive shaft in them.

Between the ears 9 there is one end of the lever of the handle 6, and at this end there is an opening 12 for accommodating the drive shaft of the handles, while the opposite end of the lever of the handle is placed in the open cavity of the housing 1 with the possibility of interaction with the spring 7 of the return of the lever of the handle, interaction with the supporting places 13 and 14 of the housing 1 and interaction with the shank 4 of the tongue 3.

Latch work.

1. Storage and transportation of the latch.

During storage, transportation, the handle lever does not fall out of the case, as it is placed between several elements of the latch. The lever of the handle is limited by two planes of the ears of the housing. The tongue spring presses the lever of the handle to the supporting places of the housing. The handle lever spring also presses the handle lever to the support points of the housing.

2. Installing the latch.

During the installation of the latch, it is enough to drill a round hole in the end of the metal door and insert the latch body into the cavity of the door with a certain turn. The handle lever also does not fall out of the latch for the reasons mentioned above.

When installing the rotary shaft of the handles, the shaft first enters the hole in the ear of the housing, then in the hole of the lever of the handle and then into the next hole of the ear of the housing. Thus, in addition to fixing the handle lever with springs, it is finally fixed in its working position by the rotary shaft of the handles.

3. Operation of the latch.

After installing the rotary shaft of the handles and the handles themselves, the latch works in this way.

When pressing the handle, the rotary shaft of the handles, rigidly fixed on the handles, turns the lever of the handle. The handle lever with its opposite end acts on the supporting surface of the shank of the tongue and pulls the tongue into the cavity of the latch housing. In this case, the spring 5 of the tongue return is compressed. The handle return spring 7 is stretched and always strive to return the handles to their original horizontal position.

When releasing the handles, the tongue return spring returns the tongue to its original position when the tongue is fully extended from the housing.

The handle return spring returns the handles to their original initial horizontal position.

Claims (2)

1. A latch comprising a housing 1 with a strap 2, a spring-loaded tongue 3 with a shank 4 and a handle lever 6 with a hole 12 for the drive shaft installed in the housing, characterized in that the housing 1 is provided with two ears 9 located on the housing 1 from the side opposite strap 2, and protruding beyond the dimensions of the internal cavity of the housing 1 in the direction transverse to the axis of the tongue shank 4, the ears 9 have openings 11 on the same axis 10 for accommodating the drive shaft of the handles, and between the ears 9 there is an end of the handle 6 with an opening 12 for priv bottom shaft handles. 2. The latch under item 1, characterized in that the housing is made in the form of a pipe segment.

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