RU2794637C1 - Respiratory mask - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: respiratory mask consists of an obturator, a branch pipe and a replaceable filter element. The replaceable filter element is put on the branch pipe with its elastic edge, and the branch pipe has holes for threading the belts of the replaceable filter element.

EFFECT: creation of a respiratory mask with a good seal to the user's face, using replaceable filter elements with an elastic edge.

8 cl, 4 dwg

Description

The present invention relates to personal protective equipment, in particular to respirators. It can be used as a means of respiratory protection in industry, medicine and everyday life.

State of the art

Known respiratory mask with article number 6894 company 3M (USA), containing obturator, pipe for attaching a replaceable filter element. The replaceable filter element is a rigid cartridge that is inserted into the nozzle. It is quite expensive and is poorly disposed of, because. consists of dissimilar materials - a plastic housing and a filter material. The obturator does not encircle the user's chin, which makes it difficult to speak during operation and reduces comfort, because. the chin is fixed by the mask.

Also known is the respiratory mask "Petal", which has become widespread in the USSR, and has been successfully used to this day. It is cheap, easy to recycle, has high characteristics of the filter material (Petryanov FPP fabric). There are modern modifications for protection against dust, aerosols and small concentrations of harmful gases (respirators of the Alina, R-2U series manufactured by Respiratory Complex LLC, Russia). However, this mask is uncomfortable to put on and does not fit snugly against the wearer's face. In addition, the area in which this respirator touches the wearer's face may cause discomfort, because. has a small area of the area of contact with the face and a tissue fibrous base.

Disclosure of invention

The technical result of the invention is to create a respiratory mask with a good fit to the user's face, using replaceable filter elements with an elastic edge. Such filter elements can be, in particular, unshaped respirators with an elastic edge (obturator) of the "Petal" type. Also, such filter elements can be, for example, cuts of a filter cloth with an elastic band sewn around the perimeter. The tape can be tightened at the factory or directly by the user before installing the filter element. The filter element is fixed on the nozzle due to the elasticity of the elastic edge of the filter element.

Respiratory mask containing an obturator, a branch pipe and a replaceable filter element, characterized in that the replaceable filter element is put on the branch pipe with its elastic edge.

The specified branch pipe may have a round, oval or other cross-section in the form of a convex flat figure. The convexity condition of the figure is necessary so that the elasticity of the elastic edge ensures a snug fit of the replaceable filter element to the nozzle.

The elastic edge of the filter element has at least two functions: to hold the filter element to the nozzle and to ensure that the cartridge fits snugly against the nozzle.

The replaceable filter element is preferably made of lightweight textile materials with a Petryanov (FPP) or meltblown filter base. An exhalation valve can be installed on the replaceable filter element.

Under the elasticity of the edge of a replaceable filter element is understood the possibility of its significant elastic stretching with a relatively small acting force. In the tightened (compressed) state, the inner side of the edge should have a perimeter extension less than the perimeter of the outer part of the pipe. Then, when putting on a replaceable filter element on the pipe, a snug fit to the pipe will be ensured. The elasticity of the edge can be ensured both by the properties of the edge material itself, and by introducing additional elements, for example, by sewing a rubber band into the edge.

The branch pipe may have a side on the outside to prevent the replacement filter element from jumping off. Also, holes can be provided on the branch pipe for threading the headband tapes of the “Petal” type respirator used as a replaceable filter element to prevent it from jumping off. Preferably, there are two holes on the sides of the pipe, and three holes in the lower part. Then the tapes threaded into the holes will partially cover the nozzle, and exit into the middle lower hole outside the nozzle, where they can be easily tied or fixed with a clip.

A collar or other device can be put on top of the replaceable filter element, put on the branch pipe, to prevent jumping off, which provides additional pressing of the replaceable filter element to the branch pipe.

The size of the cross-sectional area of the nozzle must ensure free passage of air and convenient putting on of the replaceable filter element. Preferably, the cross-sectional area of the nozzle is not less than 50 cm ² . With a smaller cross section, it will be more difficult to put on a replaceable filter element and the general appearance of a respiratory mask with a replaceable filter element on will be unaesthetic.

When used as a replaceable filter element of a respirator of the "Petal" type, the edge of this respirator with an elastic insert must be pre-tightened to ensure a snug fit on the nozzle. Unformed respirators "Alina" (LLC "Respiratory Complex", Russia), belonging to the type "Lepestok", have a pre-tightened elastic edge, they can simply be put on the nozzle (with a sufficiently large cross section of the nozzle).

The obturator of the proposed respiratory mask is preferably made of soft plastic, such as medical grade silicone or polyurethane. Using 3D printing technology, the obturator can be made with an anatomical surface of contact with the user's face, according to a 3D model of the user's face. The custom-made obturator has a large area of contact with the user's face and the most comfortable use. A universally shaped obturator should be made in various sizes.

The area of contact of the seal of the respiratory mask with the wearer's face should preferably cover the chin. In this case, the speech and breathing of the user when using the respiratory mask will not be hindered, because the chin will not touch the respiratory mask.

The respiratory mask is attached to the user's head by means of an elastic attachment covering the user's head and/or neck, but only adhesive applied to the obturator in the area of contact with the user's face can be used. A fastening, for example in the form of elastic bands, can also be used in combination with a sealing gel applied to the obturator. For attaching elastic bands to a respiratory mask, staples or other devices can be provided on the obturator and / or nozzle. Fastening of the respiratory mask on the face can be carried out in other ways, for example, by means of a full-face mask with a transparent visor, worn over the respiratory mask and holding it.

The specified branch pipe may be a part (continuation) of the obturator, or it may be a separate part. The preferred material for the nozzle is plastic, which is more rigid than the plastic of the obturator. The rigidity of the nozzle must be able to resist the pressure of the elastic edge of the filter element without significant deformation of the nozzle, which can disrupt the tightness of the filter cartridge.

When the branch pipe is made as a separate part, it can be connected to the obturator for a tight fit, glued or welded to it, as well as in another way that provides a tight connection.

Brief description of the drawings

FIG. 1 A three-dimensional front view of a respiratory mask with a universal obturator 1, a branch pipe 2, a side 3, holes 4 and brackets 5 for attaching headband tapes (tapes are not shown in Fig. 1) is shown.

FIG. Figure 2 shows a three-dimensional side view of a respiratory mask with a universal obturator 1, a branch pipe 2, a side 3, holes 4 and brackets 5 for attaching headband tapes (ribbons are not shown in Fig. 2). The dashed lines show the contours of the replaceable filter element 6 and its elastic edge 7, put on the pipe 2.

FIG. Figure 3 shows a three-dimensional front view of a respiratory mask with an individual anatomical obturator 1, a pipe 2, a side 3, holes 4 and staples 5 for attaching headband tapes (ribbons are not shown in Fig. 3).

FIG. 4 A three-dimensional side view of a respiratory mask with an individual anatomic obturator 1, a branch pipe 2, a side 3, holes 4 and staples 5 for attaching headband tapes is shown (ribbons are not shown in Fig. 4). Dashed lines show the contours of the replaceable filter element 6 and its elastic edge 7, put on the nozzle 2. On the surface of the obturator 1, the contact area 8 with the user's face is shaded (the user is not shown in Fig. 4).

Implementation of the invention.

On FIG. 1 and FIG. Figure 2 shows a respiratory mask with a universal shape obturator 1 adjacent to the user's face (the user is not shown in Fig. 1, 2). A replaceable filter element 6 with an elastic edge 7 (the edge is not shown in Fig. 1, in Fig. 2 is shown by a broken line).

The respiratory mask is fastened on the user's face with elastic bands (not shown in Figs. 1, 2) fixed on the mask with respiratory brackets 5.

Holes 4 make it possible to use bands of a "Petal" type respirator used as a replaceable filter element to prevent it from jumping off during operation of the respiratory mask. The ribbons are threaded from the outside of the pipe 2 into the upper side holes 4, then from the inside into the holes 4 adjacent to them, then from the outside inward into the extreme lower holes 4 and then both ribbons are threaded from the inside of the pipe 2 out into the lower central hole 4. Next, the ribbons are tied or fixed with a clamp. After that, the elastic edge 7 of the replaceable filter element 6 is shifted towards the obturator 1 to prevent air leakage between the nozzle 2 and the replaceable filter element 6.

On FIG. 3 and FIG. 4 shows a respiratory mask with an individual anatomical obturator 1 made using 3D printing technology. A replaceable filter element 6 with an elastic edge 7 (the edge is not shown in Fig. 3, in Fig. 4 is shown by a broken line). The area of contact 8 of the obturator 1 with the face of the user (the user is not shown in Fig. 3 and Fig. 4) covers the user's chin. At the same time, the chin remains free, which allows you to talk, breathe through your mouth and, in general, increases comfort when using a respiratory mask.

Contact area 8 has a sufficiently large area, which provides a secure fit and low pressure on the face, which also contributes to comfort when using a respiratory mask.

Industrial Applicability

The proposed respiratory mask provides excellent fit to the user's face, comfort and ease of use, and therefore can be effectively used as a means of respiratory protection. The author tested a sample of a respiratory mask, which confirmed its industrial applicability.

Claims (8)

1. A respiratory mask containing a skirt, a pipe and a replaceable filter element, characterized in that the replaceable filter element is put on the pipe with its elastic edge, and the pipe has holes for threading the tapes of the replaceable filter element. 2. Respiratory mask according to item 1, as a replaceable filter element with an elastic edge of which the Petal respirator is used. 3. Respiratory mask according to paragraphs. 1, 2, the cross section of the nozzle of which is not less than 50 cm ² . 4. Respiratory mask according to paragraphs. 1, 2, in which a side is made along the outer edge of the pipe. 5. Respiratory mask according to paragraphs. 1, 2, in which the contact area of the obturator with the user's face is made covering the chin. 6. Respiratory mask according to paragraphs. 1, 2, the branch pipe of which has seven holes for threading the tapes of the replaceable filter element: two upper side holes and three lower holes. 7. Respiratory mask according to paragraphs. 1, 2, the obturator of which is made individually, taking into account the anatomical features of the user's face. 8. Respiratory mask according to paragraphs. 1, 2, in which a clamp is put on the nozzle over the replaceable filter element.

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