RU2757947C1 - Protective face shield - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: protective face shield relates to the field of medicine, namely, to personal protection equipment for the upper airways, visual organs, and can be used for protection of the population from bacterial infections, from direct ingress of small particles and dust into the eyes and respiratory organs. The protective face shield comprises a headgear configured to be adjusted in length. In the front, the protective shield has a visor installed at a distance from the headgear and connected thereto at the sides by means of a hinged connection. A transparent screen is fixed on the lower edge of the visor. At least one fan is installed on the inner surface of the visor. At least one fan is connected by wires to at least one power supply located on the edges of the inner semicircular surface of the visor. The power supply is configured to be recharged.

EFFECT: creation of a protective face shield with a system for active point ventilation of the inner space wherein the air flow covers the entire inner space of the protective shield from the upper to the lower part due to the fact that the visor of the protective face shield has at least one fan on the inner surface located opposite the headgear, placed so as to provide a downward air flow throughout the entire inner space of the protective shield.

2 cl, 2 dwg

Description

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

Known solution RU 116346 U1 "Protective mask", IPC A61F 9/06, containing an elastic body, in the closed opening of which is installed an elastic removable flap, which has a semi-cylinder in cross-section, and in the front view - the shape of a parallelogram with a narrowed lower part, in the upper part of the body has a visor, in the lower part of the body has a lower stop, under which the edges of the shield are located, each side part of the body has a straight section, in which a rectilinear groove is made and the end of the side part of the shield is inserted into it, each side part of the mask body also has a parallel groove, a platform to which the inner surface of the shield adjoins, at the bottom the body has a cylindrical protrusion located under the lower stop, while the cylindrical protrusion is located in the hole of the shield, on each rectilinear section of the side part of the body a central hole is made for the axis of attachment of the headgear, a plurality of radial holes for the retainer the headguard, in the lower, middle and upper parts of each side wall along its perimeter, there are ledges against which the ends of the shield abut, and a gap is formed between the end of the cylindrical protrusion and the lower stop.

The disadvantage of this technical solution is that this protective mask does not have a system of active point ventilation under the mask space, which leads to fogging of the shield, dust ingress into the inner space, as a result, the performance properties of the mask are reduced. (RU 116346 U1, http://new.fips.ru).

Known solution SU 1299559 A1 "Head shield", IPC A42B 3/00, containing a screen associated with the headgear to protect the eyes. The headband has a rim and headband. A chin protector made of segments is located under the screen. The shield has staples to cover the back of the head, and the shield is rigidly fixed at the ends of the staple to form a frame. The headrest is located inside the frame. The rim of the headgear on its outer surface around the circumference has elastic elements for interaction with the frame.

The disadvantage of this technical solution is that this head shield does not have a system of active point ventilation of the inner space, which leads to fogging of the screen, dust getting into the interior space, as a result of which the operational properties of the head shield are reduced. (SU 1299559 A1, http://new.fips.ru).

Of the known technical solutions, the closest in purpose and technical essence to the claimed object is the solution SU 1556674 A1 "Protective mask", IPC A61F 9/06, containing the front part of the body, which is made with a double wall, and the walls form a cavity in which between the filtering an element and a viewing window a fan is located, and the light filter is made in the form of two plates located at an angle of 10-15 ° to each other and fastened by a holder, and one plate closes the viewing window of the front wall of the case, and the second crosses the viewing window of the inner wall of the case, forming with the slot, while the holder is attached to the front wall of the housing in the upper part of the viewing window. The contour of the holder surface lying between the plates is profiled in the form of a parabolic half-cylinder. An elastic cuff obturator is located around the entire perimeter of the body and is attached to the edges of the body using a sealing profile and clamps.

The disadvantage of this technical solution is the lack of active air flow covering the entire surface of the mask from the inside from the top to the bottom of the mask, which contributes to the accumulation of moisture, dust and small solid particles in the upper part of the mask. (SU 1556674 A1, http://new.fips.ru).

The closest analogue can be considered the solution CN209846209U "Pair of novel defogging type supply room face protecting glasses" containing a transparent screen (cover) (1), a mounting plate (2), a discharge 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.

The disadvantages of the known solution 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 center of the user's forehead (see Fig. 1), the jet will go clearly on the user's nose, excessively cooling it, when In this case, the nose will split the stream in two and fall into the user's eyes. Another disadvantage is a complicated design, namely, the fan (17) is located in such a way that structural complications in the form of blowers (12), (13) and a spray head (18) installed in the blower (12) are required to direct the flow of the taken air downward. In addition, the fan (17), the blowers (12), (13), the spray head (18) and the batteries (11) are located on the fastening plate (2), which acts as a rim around the user's head.

This number of elements puts stress on the user's head and causes the screen to slide down the user's forehead. In addition, the screen is surrounded by a protective shutter (5) through the mounting holes (4) and the inner sides of two sets of mounting holes (4), and an adjustment buckle is attached to the outer side of the protective shutter (5), (7), which additionally makes the screen heavier. Another drawback is that the attachment on the user's head is made of two elements that are rotatable relative to each other and perform the function of a rim, while if one of the elements is raised upward (folded back), the product will not stay on the head. All this 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.

The objective of the claimed solution is the development of a face shield with a system of active point ventilation of the inner space, in which the air flow covers the entire inner space of the protective shield from the top to the bottom. Improved usability.

The essence of the invention

This problem is solved due to the fact that the visor (2) of FIG. 1 of the face shield on the inner surface, which is located opposite the headgear (1), has at least one fan (4) of FIG. 2, located in such a way as to ensure the propagation of the downward air flow throughout the entire inner space of the protective screen from the top to the bottom, forming a system of active point ventilation of the inner space.

The face shield comprises the headgear (1) of FIG. 1, 2 formed by a rim (1.1), covering the user's head in the horizontal plane from the front, back, side, as well as by a tape (1.2) passing across the head from above and mating with the rim (1.1) from the sides. The rim (1.1) and the tape (1.2) have the ability to adjust the length.

From the front, the protective screen has a visor (2) FIG. 2 of a semicircular shape, installed at a distance from the headgear (1) and connected to the rim (1.1) on the sides by means of a hinge joint that allows the visor (2) to rotate. This design distributes the screen load evenly on the user's head and prevents the rim from sliding down. Enhancing usability.

Towards the lower edge of the visor surface (2) of FIG. 1 a transparent screen (3) is rigidly attached to protect the upper respiratory tract, the user's eyes. On the inner surface of the visor (2) of FIG. 2, which is located opposite the headgear (1), at least one fan (4) is installed in such a way as to provide a downward flow of air throughout the entire inner space of the protective screen, thereby forming a system of active point ventilation of the inner space. The arrangement of at least one fan (4) in the visor (2) allows the air flow to cover the entire inner space from the top to the bottom, thereby eliminating the formation of moisture on the inner surface of the screen (3) of FIG. 1, as well as preventing the ingress and accumulation of small solid particles and dust in the inner space of the protective shield.

The fan (4) 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 face shield. At least one fan (4) of FIG. 1, 2 is connected by wires to at least one power source (5), which is located at the edges of the inner semicircular surface of the visor (2), thereby eliminating damage to the power source from exposure to solid particles. In the particular case of the execution, the power supply is located on the user's belt. The power supply (5) is rechargeable.

In a particular case of execution, the face shield has a power supply unit that allows at least one fan (4) located on the inner surface of the visor (2) to operate on mains voltage.

The technical result consists in creating a protective screen for the face with a system of active point ventilation of the inner space, in which the air flow covers the entire inner space of the protective screen from the top to the bottom due to the fact that the visor of the protective screen for the face on the inner surface, which is located opposite the headgear , has at least one fan, located in such a way as to provide a downward flow of air throughout the inner space of the protective screen. Making the head mount independent of the screen improves usability.

Brief Description of Drawings:

in fig. 1 is a schematic illustration of a face shield. Isometric view;

in fig. 2 is a schematic illustration of a face shield. View from above;

Brief description of structural elements:

1 - headgear;

1.1 - rim;

1.2 - tape;

2 - visor;

3 - screen;

4 - fan;

5 - power supply;

Implementation of the declared decision:

The stated solution works as follows.

The face shield is put on the head using the headgear (1) of FIG. 1 and adjust the girth of the head with the headrest (1) by changing the length of the rim (1.1) and the band (1.2). Include an active point ventilation system. The transparent screen (3) is lowered so that its surface completely covers the face. The intensity of the downward air flow through the inner space of the face shield is regulated by changing the fan speed (4). The downward air flow from at least one fan (4) covers the entire inner space of the protective shield, thereby preventing the ingress and accumulation of small solid particles and dust in the inner space of the protective shield, as well as the formation of moisture on the inner surface of the shield (3).

Claims (2)

1. A protective shield for the face, including a headgear, a shield, at least one fan and at least one power source, characterized in that the headgear consists of a rim covering the user's head in a horizontal plane from the front, back, side, and a tape running across the head from above, the rim and the tape are mated on the sides, the visor has a semicircular shape, installed at a distance from the headrest and pivotally connected to the rim on the sides, the visor on the inner surface has at least one fan located in such a way as to provide a downward air flow throughout the inner space of the protective shield. 2. Screen according to claim 1, characterized in that the power supply is rechargeable.

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