RU2750496C1 - Protective face mask - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: protective face mask relates to the field of medicine. The mask contains a rotating protective screen, a unit for fixing the mask on the head in form of a band and a rim connected to it, passing across the head from above, an air supply fan, a hinged connection of the screen with the band. Along the upper edge, the protective screen is paired with a side mounted on the inside with the front edge of the visor, which has at least one additional fan on the lower surface, each of which is located under a through hole made in the visor. The screen is made U-shaped, having a frontal plane and two side lines, the connections of which have a smooth bend, do not distort the image of objects.

EFFECT: achieved is uniform distribution of the air flow, covering the entire internal space of the protective screen from the top to the bottom.

10 cl, 2 dwg

Description

The invention relates to medicine, namely to personal protective equipment and can be used to protect the population from bacterial infections, from the direct hit of small particles and dust in the eyes and respiratory system.

Of the known technical solutions, the closest in purpose and technical essence to the claimed object is the utility model RU 38110 U1 "Protective face mask" IPC A61F 9/04, containing a transparent protective screen, which is attached to the fixation unit by means of the attachment point. The fixation unit is made in the form of a hoop and consists of a rigid arch and a soft belt. On the outer side of the arc there are stops that limit the angle of rotation of the screen to a horizontal position. The belt has a buckle that allows you to adjust the length of the belt depending on the size of the head. On the outside of the screen, on the side, a miniature fan is fixed, for the operation of which a hole is made in the screen. A filter is attached to the outside of the fan. The fan is powered by a miniature voltage source that can be fastened to a belt.

The disadvantage of this technical solution is that only the air supplied through the fan is cleaned. The absence of a coating on the top allows untreated air to flow from above through the hole formed between the screen and the rigid arc of the fixation unit, as well as from below under the screen. Another drawback is the uneven load of the screen due to the fan located on the side, which leads to an unstable position during operation, as well as to a violation of the view, and the protruding part of the fan itself leads to inconvenience in using the screen, it can catch on objects. (RU 38110 U1, http://new.fips.ru). Another disadvantage is the presence of a rib formed at the junction of the front and side parts of the screen.

The closest analogue can be considered the solution CN 209846209 U "Pair of novel defogging type supply room face protecting glasses)) containing a transparent screen (cover) 1, a mounting plate 2, an injection cylinder 12 located on the front side on the mounting plate with a spray head 18 directed downward , a pivot plate 16 enclosing the user's head from behind.

Disadvantages of the known solution

The transparent screen (cover) 1 in the process of installation takes on an arched shape surrounding the user's face. As practice has shown, such a bend leads to a distortion of visibility (lens effect.) Another drawback is the jet direction of the air flow coming from the fan through the spray head 18. Taking into account the fact that the fan is located in the area of the user's forehead, the jet will go clearly towards the nose cooling the user excessively. Also, the nose will split the stream in two and get into the user's eyes.

The problem to which the claimed solution is directed is the development of a design of a face mask with a protective screen and fan (s), in which the air flow is evenly distributed, covers the entire inner space of the protective screen from the top to the bottom, and does not interfere with the user. The screen has good visibility without distortion.

The essence of the invention

The problem is solved due to the fact that the protective mask has a structure in which the fan (s) are placed on the visor of FIG. 12.

The face shield comprises a rim (1) of FIG. 1, 2, wrapping around the user's head in a horizontal plane and a rim (2), mated at the ends with a rim (1) and extending across the head from above. The peg (1) and the rim (2) are made with the possibility of adjusting the length, for example, by means of buckles (7) of FIG. 1, 2 and / or contact tape (Velcro) and / or crab.

The face shield comprises a screen (4) of FIG. 1, 2, covering the user's face, and along the upper edge is mated with the bezel (3) of the screen (4). On the inner side, the bead (3) of the screen (4) is mated with the front edge of the visor (5) of FIG. 2.

In a particular case, the side (3) of the screen (4) is made inclined towards the user's head (8), preventing debris and dust from getting into the fans (6).

The screen (4) is connected to the rim (1) by means of a hinged joint, which allows the screen (4), together with the rim (3), the visor (5), to rotate relative to the rim (2).

The inner edge of the visor (5) of FIG. 1, 2 is rounded and installed with a gap from the rim (1). On the lower surface of the visor (5) of FIG. 1, 2, at least two fans (6) are installed so as to provide a downward flow of air throughout the entire inner space of the mask. The visor (5) for each fan (6) has a through hole (5.1). This arrangement of the fans prevents the entry of contaminated air from the front, allows you to evenly distribute the load on the screen during operation, and evenly distribute the screen load on the user during operation. In addition, the forced outflow flow prevents contaminated air from entering from below and from the sides. In addition, the presence of more than one fans supplies air evenly, without the formation of a clear stream.

In the particular case of execution on the inner edge of the visor (5) has a flow guide (5.2) directed downward at an angle towards the screen. The guide (5.2) cuts off the downward flow from the user's forehead and directs it into the space between the user and the screen (4).

The U-shaped screen (4) has a frontal plane (4.1) and two side ones (4.2). Along the line of connection of the planes, a smooth bend of FIG. 1. Such execution of the screen (4) excludes distortion.

The fan (6) has the ability to adjust the rotation speed, which allows you to adjust the intensity of the downward air flow through the inner space of the protective screen.

The fan (6) is connected by wires (6.1) to at least one power supply.

In the particular case of the execution, the power supply (not shown in the pictures) can be located (s) at the end (s) of the lower surface of the visor (5).

In the particular case of the execution, the power supply is located on the user's belt. The power supply is rechargeable.

In a special case of execution, the face shield has a power supply unit that allows at least one fan (6) to operate on mains voltage.

In a particular embodiment, the claimed solution may have a filter element (not shown in the images), fixed hermetically along the upper edge of the bead (3) of the screen (4) and the trailing edge of the visor (5), forming a closed cavity above the visor. The location of the filter element does not interfere with the free movement of the screen (4), together with the rim (3) and the visor (5), to rotate relative to the rim (2) from the vertical position to the horizontal position and back.

The filter element made of woven or non-woven fabric, flexible for shaping, has the following properties: it allows air to pass through, filters out dust and / or bacteria, viruses.

In the particular case of the execution, the fastening of the filter element to the visor (5) and the rim (3) of the screen (4) is made with the possibility of replacing the filter element, i.e. allows you to detach the filter element from the visor (5) and the rim (3) and reinstall, the same or a new one.

The technical result consists in the uniform distribution of the air flow, covering the entire inner space of the protective screen from the top to the bottom, and does not interfere with the user. The screen has good visibility without distortion.

Brief Description of Drawings:

in fig. 1 is a schematic illustration of a face shield on a user;

in fig. 2 - Schematic representation of a face shield (top view).

Brief description of structural elements:

1 - band;

2 - rim;

3 - screen side;

4 - screen;

5 - visor;

5.1 - feed hole;

5.2 - guide;

6 - fan;

6.1 - wire;

7 - length regulator;

8 - user.

Implementation of the declared decision:

The stated solution works as follows.

The protective screen is put on the user's head, the protective screen (4) forward in the forehead area, the band (1) covers the user's head in the horizontal plane, and the rim (2) is transversely from above. If necessary, adjust them in accordance with the girth of the head using the length adjusters (7).

After installing the declared protective mask, the fans (6) installed on the lower surface of the visor (5) are turned on. The screen (4) of FIG. 1 so that its surface completely covers the face. In a particular case, the executions regulate the intensity of the downward air flow into the inner space of the face shield by changing the rotation speed of the fan (s) (6). Fans (6) draw air from the environment from above, in particular through a filter element.

In the particular case of the design, when the filtering element is removable, the user, if necessary, can replace the filtering element by detaching it from the upper edge of the rim and the trailing edge of the visor, and fixing a new one or the same after cleaning.

In the particular case of execution when the solution on the inner edge of the visor (5) has a flow guide (5.2), it cuts off the downward flow from the user's forehead and directs it into the space between the user and the screen (4).

The design of the face shield removes dust and small solid particles from the air, reducing their harmful effects on the user's body, and the shape of the screen does not distort the view. The presence of more than one fan simplifies the design and gives an even downward air flow.

Claims (10)

1. A protective face mask containing a rotatable protective screen, a mask fixation unit on the head in the form of a band, an air supply fan, a hinged connection of the screen with a band, characterized in that it includes a rim extending across the head from above, at the ends connected to the band, along the upper edge of the protective screen is mated with a rim, fixed on the inner side with the front edge of the visor, having on the lower surface additionally at least one fan, each of which is located under the through hole made in the visor, while the screen is U-shaped, having a frontal plane and two lateral lines, the joints of which have a smooth bend. 2. The mask of claim. 1, characterized in that the visor on the inner edge has a flow guide directed downward at an angle towards the screen. 3. The mask of claim. 1, characterized in that the fans have the ability to adjust the rotation speed. 4. The mask of claim. 1, characterized in that the fan power supply is located on the lower surface of the visor. 5. The mask of claim. 1, characterized in that the power source is located on the user's belt. 6. The mask of claim. 1, characterized in that the power source is rechargeable. 7. The mask according to claim 1, characterized in that it has a power supply unit that allows at least one fan to operate on mains voltage. 8. The mask according to claim 1, characterized in that it has a filter element fixed hermetically along the upper edge of the screen bead and the trailing edge of the visor. 9. The mask of claim. 8, characterized in that the filter element, made of woven or non-woven fabric, pliable for shaping. 10. The mask of claim. 8, characterized in that the attachment of the filter element to the visor and the side is made with the possibility of replacing the filter element.

Images