CN212139419U

CN212139419U - Rear filtering type protective mask

Info

Publication number: CN212139419U
Application number: CN202020221979.6U
Authority: CN
Inventors: 缪景霞; 何朗明
Original assignee: Southern Hospital Southern Medical University
Current assignee: Southern Hospital Southern Medical University
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-12-15
Anticipated expiration: 2030-02-27

Abstract

The utility model discloses a rear filtering type protective face mask, which mainly comprises a mask body, a filter valve, a support frame and a transparent thin plate. The filter valve is arranged at the rear part of the cover body, and the transparent thin plate is arranged at the front part of the cover body. The bottom of the cover body is provided with a flexible telescopic belt, the center of the flexible telescopic belt is provided with a penetration opening, and an elastic belt is arranged around the penetration opening. The supporting frame is arranged above the cover body in the inner part, and a gap is reserved between the outer edge of the supporting frame and the inner edge of the supporting frame. The filter valve is disposed behind the housing, from which gas is exchanged. After the rear filtering type protective mask is used, the whole mask body is sleeved on the head of a human body, one end facing a patient is waterproof and airtight, and the filter valve is arranged at the rear part, so that excessive viruses are not left on the surface of the filter valve, and the filter valve is prevented from being wetted by body fluid of the patient and losing efficacy. The support frame makes to leave certain distance between the cover body and the human head, ensures the normal circulation of air. The elastic band has elasticity and can stretch the head cover, so that the skin is not easily crushed.

Description

Rear filtering type protective mask

Technical Field

The utility model relates to the technical field of medical equipment, in particular to rear filters formula protective face mask.

Background

Medical personnel often need wear n95 protective facial mask when contacting infectious disease people, and protective facial mask has good gas tightness, can completely cut off the virus, but its stress point is little, and the time of wear is extruded easily on the nose for a long time and is pressed the sore, and the gauze mask probably remains a lot of viruses when facing patient in addition, and one nevertheless the gauze mask is splashed wet by liquid and is lost protective capacities, and the virus of attaching to above will pass through the gauze mask, infects medical personnel.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a rear filtration formula protective face mask, reduce and press the sore incidence and reduce the infection risk.

The utility model adopts the technical proposal that: a rear filtering type protective mask comprises a mask body, wherein an opening is formed in the bottom of the mask body, a valve hole is formed in the rear of the mask body, a visual hole is formed in the front of the mask body, a flexible telescopic belt is arranged at the opening, a penetrating port is formed in the center of the flexible telescopic belt, and an elastic binding belt is arranged around the penetrating port; a filter valve disposed on the valve hole; the supporting frame comprises a hat rack, an umbrella rack and a supporting rod, the supporting frame is arranged above the cover body, the supporting rod is arranged between the umbrella rack and the hat rack, the hat rack is arranged below the umbrella rack, the rack edge of the umbrella rack is tightly attached to the inner side wall of the cover body, and a gap is reserved between the outer edge of the umbrella rack and the outer edge of the hat rack; and a transparent sheet disposed at the visual hole.

Has the advantages that: a filter valve is provided behind the rear filtering face guard from which gas is exchanged. The end facing the patient is a completely closed membrane, and the filter valve is arranged at the rear part, so that excessive virus does not remain on the surface of the filter valve, and the filter valve is prevented from being damaged by splashing body fluid of the patient to wet the filter valve. The elastic belt of the rear filtering type protective mask is arranged at the opening at the lower part, so that the stress area is large, and the pressure sore incidence rate is reduced.

Further, the filter valve is arranged at the upper end of the rear part of the cover body.

Furthermore, the cover body is made of chemical fiber or plastic materials.

Furthermore, an annular perforation is formed along the penetration opening of the flexible expansion band, and the elastic band is tightly fastened at the two end parts after penetrating through the perforation.

Further, the elastic belt is a flat-wide elastic belt.

Further, the transparent sheet is adhered to the visual hole of the cover body.

Further, the umbrella stand also comprises an air supply system, wherein the air supply system comprises a small fan and a driving device, the driving device is driven by a battery, the air supply system is arranged at the front end of the umbrella stand, and the fan faces to the rear lower part.

Further, a soft board is arranged below the transparent thin board.

Drawings

The invention will be further described with reference to the following figures and examples:

FIG. 1 is a half sectional view of the present embodiment;

fig. 2 is a rear view of the present embodiment.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, the rear filtering type face guard is mainly composed of a mask body 1, a filter valve 4, a support frame 5, and a transparent sheet 3. Specifically, a valve hole is formed at the rear of the cover body 1, and the filter valve 4 is installed at the valve hole. The cover body 1 is provided with a visual hole in front thereof, and the transparent sheet 3 is mounted in the visual hole. The bottom of the cover body 1 is provided with an opening, the edge of the opening is provided with a flexible telescopic belt, the center of the flexible telescopic belt is provided with a penetration hole, and an elastic binding belt 2 is arranged around the penetration hole. When the mask is worn, the head of the user penetrates through the penetrating port to enter the mask body 1, and the elastic bridle 2 is tensioned, so that the flexible extensible belt is tightened, and the protection mask is closed. The supporting frame 5 is arranged above the cover body 1, the supporting frame 5 comprises a hat rack, an umbrella stand and a supporting rod, the supporting rod is arranged between the umbrella stand and the hat rack, and the hat rack is arranged below the umbrella stand. Specifically, the hat rack is in a hat shape, a support extends from the top of the hat to the four sides of the brim of the hat, and the lower ends of the four supports are connected into a circular support. The umbrella frame is in the shape of an umbrella framework, a support extends from the umbrella top to the four directions, the frame edge of the support is tightly attached to the inner side wall of the cover body 1, and the umbrella top is connected with the hat top through a support rod. The hat rack is worn on the head to fix the mask. The support frame 5 is made of plastic materials and is light and easy to wear. The filter valve 4 is arranged behind the housing 1, where the gas is exchanged. After the rear filtering type protective mask is used, the whole mask body 1 is sleeved on the head of a human body, one end facing a patient is waterproof and airtight, the filter valve 4 is arranged at the rear, so that excessive viruses are not left on the surface of the filter valve 4, and the filter valve 4 is prevented from being wetted by the body fluid of the patient and losing efficacy. Support frame 5 is installed at the internal surface of the cover body 1, and after wearing this protective mask, support frame 5 and human head or face butt form the space between the internal surface of the cover body 1 and human head or face, ensure to be located and can realize the normal flow of air between the filter valve 4 at rear and the human respiratory track for the human body can be smooth and easy breathe through the filter valve 4 at rear. The elastic strap 2 has elasticity and can be propped open the head cover, and the elastic strap 2 has elasticity in addition, and compared with the conventional mask, the mask has the advantages that the stress area is large, the acting force can be dispersed, and the skin is not easily crushed.

Preferably, the filter valve 4 is installed at the upper end of the rear part of the cover body 1, and the filter valve 4 is installed at a higher position, so that the possibility that the filter valve 4 is failed due to spray splashing to the filter valve 4 is greatly reduced.

Preferably, this cover body 1 adopts chemical fibre or plastics material to make, adopts airtight material as the material of cover body 1, has increased the closure, can be better prevent that droplet or other liquid from getting into the face guard inside, can also make the inside confined space that forms of cover body 1, ensures that the inhaled air of human is through the filter valve 4 inflow. So that the air exchange of the filter valve 4 can be performed normally.

Preferably, an annular through hole is formed along the flexible stretch band insertion opening of the cover body 1, and the elastic band 2 is inserted into the through hole and then fastened at both ends thereof. The elastic belt 2 is provided with an adjusting section outside the face mask, so that the tightness of the elastic belt 2 can be adjusted, and the rear filtering type face mask can be conveniently worn.

Preferably, the elastic belt 2 is a flat and wide type elastic belt 2.

Preferably, the transparent sheet 3 is bonded to the outer periphery of the visual hole of the cover 1.

Preferably, the umbrella stand further comprises an air supply system, the air supply system comprises a small fan and a driving device, the driving device is driven by the battery, the air supply system is arranged at the front end of the umbrella stand, and the small fan faces towards the rear lower direction. Specifically, this air supply system does not communicate with the external world, has strengthened the inside air flow of face guard, can avoid the steam of exhaling to touch transparent sheet 3 simultaneously and produce the fog, influence the field of vision.

Preferably, a soft plate is disposed under the transparent thin plate 3. After wearing, the soft board is covered above the nose of the human body. The soft board can prevent the hot air from rising, thereby preventing the hot air from touching the transparent thin plate 3 to generate fog.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A rear filtering face shield comprising:

the mask comprises a mask body, wherein an opening is formed in the bottom of the mask body, a valve hole is formed in the rear of the mask body, a visual hole is formed in the front of the mask body, a flexible telescopic belt is arranged on the opening, a penetrating opening is formed in the center of the flexible telescopic belt, and an elastic binding belt is arranged around the penetrating opening;

the filter valve is arranged on the valve hole;

the supporting frame comprises a hat rack, an umbrella rack and a supporting rod, the supporting rod is arranged between the umbrella rack and the hat rack, the hat rack is arranged below the umbrella rack, the rack edge of the umbrella rack is tightly attached to the inner side wall of the cover body, and a gap is reserved between the outer edge of the umbrella rack and the outer edge of the hat rack; and

a transparent sheet disposed at the vision hole.

2. The rear filtering face guard of claim 1, wherein: the filter valve is arranged at the upper end of the rear part of the cover body.

3. The rear filtering face guard of claim 1, wherein: the cover body is made of chemical fiber or plastic materials.

4. The rear filtering face guard of claim 1, wherein: and an annular perforation is formed along the penetrating port of the flexible telescopic belt, and the elastic belt is tightly tied at two end parts after being penetrated into the perforation.

5. The rear filtering face guard of claim 4, wherein: the elastic belt is a flat wide type elastic belt.

6. The rear filtering face guard of claim 1, wherein: the transparent sheet is adhered to the visual hole of the cover body.

7. The rear filtering face guard of claim 1, wherein: the umbrella stand is characterized by further comprising an air supply system, the air supply system comprises a small fan and a driving device, the driving device is driven by a battery, the air supply system is arranged at the front end of the umbrella stand, and the small fan faces the rear lower side.

8. The rear filtering face guard of claim 1, wherein: and a soft plate is arranged below the transparent thin plate.