DE202020001807U1 - Protective screen filter with ventilation - Google Patents

Abstract

Filter as a protective screen filter with ventilation for the eyes, nose and mouth to protect the mucous membranes and the respiratory organs against pollen, dust, bacteria, viruses when breathing through the nose or mouth and when spraying in air space, characterized in that a transparent protective screen (25 ) a filter frame (1) is locked in a holder (7) and, by means of flexible strands (17) around the head (23) with sealing pressure (22) placed on the face over the mouth, nose, eyes, breathing paths (8) through the filter frame (1 ), Filter insert (6) and exhalation valve filter (4) and inhalation valve filter (5), with a filtered air supply (13) into the breathing space (3) through an integrated air hose (10).

Description

The invention is a protective screen, consisting of a transparent material, which, among other things, allows a view and it is breathed through a flexible filter seal attached to the protective screen with a cover made of tissue material or filter fleece, the filter seal protecting the nose, eyes and mouth against Dust, bacteria, viruses are sealed and air is filtered into the breathing space.
The sealing pressure of the filter sealing ring on the facial skin is achieved by holding strands on the protective screen.

Face masks have a filter effect and are used, e.g. in the case of medical use, to keep the germs exhaled by the doctor or medical personnel away from the patients to be treated, which is particularly important in the case of surgical interventions, but also vice versa to protect the treating person against the inhalation of pathogenic bacteria. In addition, so-called droplet infections of the doctor or the patient should be prevented.

Face masks are also used in the non-medical field, e.g. in baby care or in the case of colds, exposure to dust, fumes or the like.

Face masks usually consist of gauze or gauze fabric, which are placed on top of each other several times. The mask then achieves a filter efficiency for germs with a value of less than 50%, which is perceived as insufficient for many purposes, especially in the medical field. Therefore, very fine filter masks are used, which consist of several, usually three layers, the actual filter layer between the two outer cover layers made of the finest fiber material, for example of glass fibers or asbestos fibers, with a diameter of less than 10 μ.
Such combinations show a high filter efficiency, especially when using glass fibers. However, there are serious disadvantages for the user, consisting on the one hand of the very high resistance of the fine fiber layer with regard to gas exchange (breathing air) and on the other hand skin irritation or the possibly carcinogenic effect of glass fibers in the lungs.
Because of the high resistance, breathing in and out is very difficult. Care must be taken to avoid glass or asbestos fibers or fiber breakage coming into contact with the wearer's skin. Because of the possibly carcinogenic effect of glass fibers, in particular glass fibers of the finest diameter, in the lungs, it must also be ensured that the wearer cannot breathe in any glass fibers or fiber breaks and that such particles do not get out of the mask on the cover side into the free space. In order to prevent the finest glass fibers from escaping, the backing and cover fleeces must be suitably dense, which in turn results in an undesirably high air resistance in connection with the very fine fiber layer.

The use of filter layers made of plastic fibers, e.g. Polyethylene or polypropylene, which is expediently produced from the melt by the spinning process, aerodynamically stretched and then laid down to form a nonwoven, is inappropriate because the nonwovens have a relatively high density, their filtering effectiveness fluctuates and they show the undesirably high air resistance.

In the GB 76 00 278.3 the solution is a filter mask made of non-woven fabric, which is characterized in that it consists of at least three layers that are mechanically or by an adhesive bonded to one another, the middle layer being a binder-free, highly air-permeable non-woven fabric made from the finest fibers, which is made by an electrostatic known per se Spray method is produced and the fibers have an average diameter of about 0.1 to 20 microns.

In the GB DE 20 2007 001 607 U1 A respirator mask for filtering the air we breathe, for example in the medical or occupational hygiene field, is characterized in that the mask body is glued directly onto the face of the mask wearer by means of an all-round adhesive edge without holding straps.

In the known designs, unfiltered air always penetrates to the side of the nostril, which means a risk for the user. In most cases, the filter material also comes into contact with the mouth or nose, which is a disadvantage.

The GB 20 2010 002 043.3 describes the use of an air-permeable foam filter with a mouthcloth in a version that is complex to manufacture.

This innovation is based on the task of developing a face protection made of foam, which on the one hand has a low air resistance, does not allow side air and on the other hand contains a coated filter layer that is very adaptable to the shape of the face and which fends off viruses and bacteria with an adhesive layer and filter material and does not have any harmful influences on the wearer or his surroundings with an optimal filter effect.
In addition, filtered air flows through the breathing space, which means that breathing and temperature are better regulated.

The object of the invention is to use a transparent protective screen, combined with a filter with air supply, so that the eyes, nose and mouth are protected from dust, bacteria, viruses and liquids and breathing and exhalation take place through filter materials. A sufficient sealing pressure on the face is to be achieved by attaching the protective screen filter by means of elastic strands around the head.
The invention is characterized, inter alia, in that the breathing space is flowed through with filtered air for better breathing and for temperature regulation from 22 ° C. (average room temperature) to 37 ° C. (“body temperature” of the face). Furthermore, two virus filters are installed as exhalation filters and as inhalation filters, which, among other things, enables a closed, one-piece filter frame as a seal and, for example, makes a filter insert unnecessary.

This invention protects the mouth, nose and eyes from viruses and spraying at the same time without additional protective devices.

The invention is described in more detail in schematic drawings.

• 1: einen Schutzschirm-Filter
• 2: einen Schutzschirm-Filter im Schnitt
• 3: die Anwendung des Schutzschirm-Filters
• 4: die Befestigung des Schutzschirm-Filters am Kopf.

Show it:

• 1 : a protective screen filter
• 2nd : a protective screen filter on average
• 3rd : the application of the protective screen filter
• 4th : the protective screen filter is attached to the head.

Reference list

1 =

Filter frame

2 =

Privacy screen length

3 =

Breathing space

4 =

Exhalation valve filter

5 =

Inhalation valve filter

6 =

Filter insert

7 =

bracket

8 =

Respiratory tract

9 =

Air holes

10 =

Air hose

11 =

Connector

12 =

Pump hose

13 =

Air supply

14 =

Air supply filter

15 =

Air device

16 =

eyelet

17 =

strand

18 =

buckle

19 =

Privacy screen width

20 =

Lock

21 =

free space

22 =

Sealing pressure

23 =

head

24 =

bulge

25 =

Protective screen

26 =

glasses

In the 1 a protective screen filter with a filter frame ( 1 ) shown in the middle of a filter insert ( 6 ) and by means of a bracket ( 7 ) on a protective screen ( 25th ) is locked. The filter frame ( 1 ) placed so that a sufficient length of privacy screen ( 2nd ) is achieved as spray protection for the chin and neck. Breathing can be done through the breathing path ( 8th ), through the filter frame ( 1 ) and the filter insert ( 6 ) respectively. In addition, exhalation through the exhalation valve filter ( 4th ) and inhalation through the inhalation valve filter ( 5 ) take place, which makes breathing very easy.

An integrated air hose ( 10th ) with air holes ( 9 ) made possible by coupling a pump hose ( 12th ) an air device ( 15 ) to the connector ( 11 ) the air supply ( 13 ) through an air supply filter ( 14 ) in the breathing space ( 3rd ).
By locking the protective shield ( 25th ) by means of strand ( 17th ), fastened in an eyelet ( 16 ), and buckle ( 18th ) the privacy screen width ( 19th ) placed in a semicircle around the face, due to the elasticity of the strand ( 17th ) the filter frame ( 1 ) a circumferential sealing pressure ( 22 ) on the skin of the face.

The 2nd shows the protective screen filter in section with filter frame ( 1 ), Filter insert ( 6 ), Protective shield ( 25th ), Bracket ( 7 ), with exhalation valve filter ( 4th ) and inhalation valve filter ( 5 ) and with the integrated air hose ( 10th ), the strand ( 17th ) in the eyelet ( 16 ) with lock ( 20 ) and the existing respiratory tract ( 8th ).

In the 3rd the application of the protective screen filter with the filter frame ( 1 ) and one, through a bulge ( 24th ) created free space ( 21 ) shown on the face, with the mouth, nose and eyes as well as the chin, neck area through the protective shield ( 25th ) are protected against virus spray.
The sealing pressure ( 22 ) is achieved by fixing an elastic strand ( 17th ) on the facial skin.
Due to the selected dimensions of the filter frame ( 1 ) glasses can be placed under the protective screen filter ( 26 ) are worn.

The 4th shows the attachment of the protective filter to the head ( 23 ) by means of strand ( 17th ) and buckle ( 18th ), the protective shield ( 25th ) with the one in the holder ( 7 ) locked filter frame ( 1 ) as well as the bulge ( 24th ) for the nose.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• GB 7600278 [0006]
• DE 202007001607 U1 [0007]
• GB 202010002043 [0009]

Claims (16)

Filter as a protective screen filter with ventilation for the eyes, nose and mouth to protect the mucous membranes and the respiratory organs against pollen, dust, bacteria, viruses when breathing through the nose or mouth and when spraying in air space, characterized in that a transparent protective screen (25 ) a filter frame (1) is locked in a holder (7) and, by means of flexible strands (17) around the head (23) with sealing pressure (22) placed on the face over the mouth, nose, eyes, breathing paths (8) through the filter frame (1 ), Filter insert (6) and exhalation valve filter (4) and inhalation valve filter (5), with a filtered air supply (13) into the breathing space (3) through an integrated air hose (10). Protective screen filter with ventilation after Claim 1 , characterized in that the air supply (13) is carried out by an air device (15). Protective screen filter with ventilation after Claim 1 , characterized in that the filter frame (1) preferably consists of foam material. Protective screen filter with ventilation after Claim 1 , characterized in that a bulge (24) forms a free space (21). Protective screen filter with ventilation after Claim 1 , characterized in that at least four elastic strands (17) are attached to the protective screen (25). Protective screen filter with ventilation after Claim 1 , characterized in that the air supply (13) takes place through an air supply filter (14). Protective screen filter with ventilation after Claim 1 , characterized in that the protective screen (25) consists of a transparent material. Protective screen filter with ventilation after Claim 1 , characterized in that a filter insert (6) is embedded all around in the filter frame (1). Protective screen filter with ventilation after Claim 1 , characterized in that the filter frame (1) consists of a closed material, and the breathing path (8) takes place only via the exhalation valve filter (4) and the inhalation valve filter (5). Protective screen filter with ventilation after Claim 1 , characterized in that the air device (15) is a pump. Protective screen filter with ventilation after Claim 1 , characterized in that the strands (17) are locked by means of a buckle (18). Protective screen filter with ventilation after Claim 1 , characterized in that the protective screen (25) consists of plastic material. Protective screen filter with ventilation after Claim 1 , characterized in that the filter insert (6) is a filter fleece. Protective screen filter with ventilation after Claim 1 , characterized in that the air supply (13) is carried out manually at intervals by an air device (15) from an elastic container. Protective screen filter with ventilation after Claim 1 , characterized in that the air device (15) is a pressure bottle with compressed air. Protective screen filter with ventilation after Claim 1 , characterized in that an oxygen bottle is connected as the air device (15).

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