RU172138U1 - Door latch for a metal door - Google Patents

Abstract

A door latch is proposed for a metal door, comprising a housing 1 with a strap 2, a spring-loaded tongue 3 with a shank installed in the housing, an emphasis on the tongue return spring, and a handle lever with an opening for the drive shaft. The lever of the handle has a spring return lever of the handle, made as a tension spring, one end of which has means of attachment to the stop, and the other end has means of attachment to the lever of the handle. 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.

For latches, which are mainly small in size, 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 rather 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, is usually 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.

An example of such a latch is a latch from patent RF 2360089.

The technical result is to increase the reliability of the latch by eliminating the sagging of its handle.

The specified technical result is achieved in that the latch contains a housing with a strap, a spring-loaded tongue with a shank installed in the housing, an emphasis on the tongue return spring and a lever of the handle with an opening for the drive shaft. The lever of the handle has a spring return lever of the handle, made as a tension spring, one end of which has means of attachment to the stop, and the other end has means of attachment to the lever of the handle.

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

The utility model is illustrated by drawings, which depict on:

FIG. 1 is a general view in isometry;

FIG. 2 - general view, in a 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 case 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 bar 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 provided with holes 11 located on the same axis 10 to accommodate the handle drive shaft.

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 body, then in the hole of the lever of the handle and then in the next hole of the ear of the body. 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 installed in the housing, a stop 8 of the tongue return spring 5 and a lever of a handle 6 with a hole 12 for the drive shaft, characterized in that the lever of the handle 6 has a spring 7 of the lever return handle, made as a tension spring, one end of which has means of attachment to the stop 8, and the other end has means of attachment to the lever of the handle 6. 2. The latch under item 1, characterized in that the housing is made in the form of a pipe segment.

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