CN2482431Y

CN2482431Y - Dustproof mask

Info

Publication number: CN2482431Y
Application number: CN 01230114
Authority: CN
Inventors: 郑美英
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-10
Filing date: 2001-07-10
Publication date: 2002-03-20
Anticipated expiration: 2011-07-10

Abstract

The utility model relates to a dust preventing mouth cover which not only can ensure user inhaled full amount of dust free air and respectively expel exhaust air exhaled form mouth and nostrils, but can stabilize local temperature around the mouth and the nostrils and increase the comfortable sense of users. The utility model is formed by that the corresponding position between the inner surface of the existing cover body and the mouth and nose is fixed and provided with a ribbon-shaped partition; the front lower part of the nostrils is provided with two quadrate or circular upper exhaust devices; in this way, the exhaust air generated from the mouth and the nose are respectively expelled out of the cover from the lower and the upper exhaust devices, and the problem that the local temperature around the nostrils and the mouth is increased when the exhaust air with body temperature exhaled from the nose passes through the mouth is solved. The protruded position in front of an upper cavity is provided with a dust filtering device in a shape of a isosceles triangle to meet the requirement that users can inhale full amount of dust free air.

Description

Anti-dust respirator

The utility model relates to a kind of dust guard, and the especially a kind of waste gas of mouth and nose exhalation can the discharge respectively to stablize case temperature, increases the anti-dust respirator of user's comfort.

At present, known anti-dust respirator is made up of dust filtration device, cover body, exhaust apparatus and bandage, by bandage it is worn over the user on the face.When air-breathing, enter in the cover after the outer air that has dust of cover passes through the dust filtration device remove dust, be inhaled into lung and utilize.During expiration, mouth is all discharged through 1 exhaust apparatus that is located at oral area inferoanterior position with the waste gas that nose is breathed out.After exhale finishing, the check valve block on the exhaust apparatus automatically resets under the effect of himself elastic force, closes steam vent.Like this, go round and begin again and finish respiratory activity.But because the waste gas of breathing out has body temperature, through oral area the time, oral area and nostril environment temperature are raise, especially more bring inconvenience to the user in the summer of sweltering heat.

The purpose of this utility model provides a kind of anti-dust respirator, it can not only guarantee that the user sucks the dust-free air of capacity, and the waste gas of mouth and nostril exhalation can be discharged respectively, and can also stablize oral area and nostril local temperature on every side, increase user's comfort.

The purpose of this utility model is achieved in that the anti-dust respirator of being made up of cover body, exhaust apparatus, dust filtration device, cut off at the inner surface of cover body and corresponding position crosswise fixed one ribbon between the mouth and nose, cover body inside is divided into upper plenum and following cavity, exhaust apparatus on 2 square or garden shapes is set in the place ahead of band shape partition.The waste gas of the belt body temperature that the user breathes out from the nostril is subjected to banded stopping of cutting off, and can not enter oral area, and directly discharge from last exhaust apparatus; The waste gas of the belt body temperature that oral area is breathed out is subjected to banded stopping of cutting off can not enter nose, and directly from exhaust apparatus discharge down, thereby reduced the temperature in the cover.

In the utility model implementation, the profile that is arranged on the dust filtration device at outstanding position, upper plenum the place ahead is up-narrow and down-wide isosceles triangle.Near the air-breathing area of this shape can the increase nostril of big limit, thus help reducing inspiratory resistance, improve unobstructed degree when air-breathing.

Owing to adopt such scheme, guaranteed that effectively the user is sucking sufficient dust-free air, successfully combustion gas the time, can also stablize case temperature, thus the level of comfort when improving user's operation.The utility model only in cover the corresponding position between oral area and the nostril banded a partition is set, at corresponding position below the place ahead that band shape is cut off and the nostril exhaust apparatus on 2 square or garden shapes is set, thereby simple in structure, suitable.

Below in conjunction with Figure of description and embodiment the utility model is described further.

Fig. 1 is the utility model embodiment vertical section structural map

Fig. 2 is the left view of Fig. 1

Among the figure: 1, cover body; 2, the banded partition; 3, following cavity; 4, following check valve block; 5, following exhaust apparatus; 6, go up the check valve block; 7, go up exhaust apparatus; 8, upper plenum; 9, dust filtration device; 10, bandage.

In the embodiment shown in fig. 1, make banded cut off (2) with foamed plastics or sponge, the corresponding position of crosswise fixed between cover body inner surface and mouth and nose is divided into upper plenum (8) and following cavity (3) with cover body inside.2 square or last exhaust apparatus (7) of garden shape are arranged on upper plenum (8) bottom, banded the place ahead that cuts off (2).The waste gas of breathing out in the nostril is subjected to bandedly cutting off stopping of (2) and can not entering down cavity (3).The pressure that produces by exhaling is pushed the last check valve block (6) of exhaust apparatus (7) open, and waste gas is discharged outside the cover from the seam of opening.After exhale finishing, pressure disappears, and last check valve block (6) is under the effect of himself elastic force, and the recovery closed condition prevents that dust from entering in the cover.When exhaling again, repeat above-mentioned action.The following exhaust apparatus (5) that is garden shape, be positioned at the inferoanterior of cavity (3) down, the gas of breathing out from mouth is subjected to stopping of (2) of banded partition can not enter upper plenum, and the pressure that produces by exhaling is pushed down the following check valve block (4) on the exhaust apparatus (5) open, and waste gas is discharged to outside the cover from the seam of opening.When exhale finishing, following check valve block (4) recovers closed condition under the effect of himself elastic force.Repeat above-mentioned action when exhaling again, the expiration activity of finishing that goes round and begins again like this.

In the embodiment shown in Figure 2, by the dust filtration device that filter dirt felt, silk screen, framework are formed, be positioned at the front portion of the corresponding bridge of the nose of upper plenum (8), profile is up-narrow and down-wide isosceles triangle.When air-breathing, under the effect of intake negative-pressure, after being filtered dust through dust filtration device, the outer air that has dust of cover enters upper plenum (8), for somagenic need.This spline structure can increase near the air-breathing area the nostril, helps reducing inspiratory resistance, improves air-breathing unobstructed degree and efficiency of dust filtration.

Claims

1, a kind of anti-dust respirator, form by cover body, exhaust apparatus, dust filtration device, it is characterized in that: corresponding position crosswise fixed one ribbon between cover body (1) inner surface and mouth and nose cuts off (2), cover body (1) inside is divided into upper plenum (8) and following cavity (3), and the place ahead that cuts off (2) in band shape is provided with 2 square or last exhaust apparatus (7) of garden shape.

2, anti-dust respirator according to claim 1 is characterized in that: the profile of the dust filtration device (9) that outstanding position is provided with in upper plenum (8) the place ahead is up-narrow and down-wide isosceles triangle.

3, anti-dust respirator according to claim 1 is characterized in that: banded cut off (2) are made by foamed plastics or sponge.