JPH11290473A - Protective mask having clouding-proof mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent clouding of glass parts of a simple protective mask to seal and protect eye parts from outer air. SOLUTION: Glasses and a mask for preventing dust are combined with each other to form two chambers each having a separate space, inspiration air of breathing is utilized to introduce outer air into a glass part, an inspiration valve 5 is provided to send air into a mask part while preventing back flow, and exhalation air is discharged outward from a discharge valve 6. When outer air temperature is lower than body temperature, temperature and humidity of air inside the glass part is decreased every time of breathing, thereby clouding of the glass part is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple protective mask in which an eyeglass portion for protecting eyes and breathing from dust and the like and a mask portion are integrated.

[Prior Art] The inner surface of the glasses see-through portion is clouded because part of expiration flows into a space formed between the see-through portion and the eyes, and sweat and tears evaporate, so that warm and moist air is cold. This is because dew condensation occurs in contact with the inner surface of the see-through portion. Conventionally, as a solution to this, a lens or plastic screen used for the see-through portion is subjected to anti-fog processing, or ventilation is improved by providing a ventilation hole in the peripheral wall portion in dustproof glasses having a peripheral wall.

[Problems to be Solved by the Invention] However, even if anti-fogging processing is performed, when the outside air temperature is low or when there is perspiration, the inner surface of the see-through portion tends to form dew. In the case of dust-proof glasses having a peripheral wall, ventilation holes are provided for ventilation, but when used in a state where the face is leveled down, the inside of the glasses is hardly ventilated and becomes cloudy. In addition, since there is a ventilation hole, the air inside the glasses and the outside air are not blocked, and dust that hangs from the front can be prevented, but substances that float in the air like pollen and irritating gas or are dissolved in the air Cannot completely protect the eyes. With underwater glasses that seal the eye part from the outside, apply saliva or an anti-fog agent to the inner surface of the see-through part and level it with water.However, the inner surface of the see-through part must always be wet, and because it is wet Small distortion in the field of view.

[0004] It is an object of the present invention to provide a protective mask having a mechanism for protecting a portion of the eye from being sealed from the outside air and protecting the see-through portion from fogging due to evaporation of sweat or tears.

[Means for Solving the Problems] In order to achieve the above object, the protective mask of the present invention is combined with a mask portion for covering the eyes and a mask portion for covering the nose and mouth, and is integrated with the mask. The temperature and humidity inside the glasses are reduced by using the inhalation of respiration to flow air into the mask through the glasses. Prevent condensation and prevent fogging.

[0006] A filter is provided in the glasses section so that outside air can flow into the glasses section. An intake valve is provided between the glasses unit and the mask unit, and the two spaces are intermittently connected, so that outside air is drawn into the mask unit through the glasses unit in one way, so that exhaled air does not flow back into the glasses unit. I do. An exhaust valve is provided between the mask part and the outside air so that the exhaled air is discharged outside without the outside air flowing directly into the mask part.

[0007] When the outside air temperature is lower than the body temperature, the temperature and humidity of the air in the eyeglass portion are reduced with each breath, and the exhaled air cannot flow back into the eyeglass portion.

[Embodiment of the Invention] An embodiment of the invention will be described with reference to the drawings based on an embodiment. The main body A in FIG. 1 is composed of an eyeglass part and a mask part, and the peripheral wall of the eyeglass part (2).
The mask peripheral wall (4) is molded of soft plastic and, when worn on the face, makes close contact with the skin and creates two sealed rooms above the eyes, nose and mouth. A number of holes are formed in the peripheral wall of the glasses section (2) to communicate with the outside air, and a filter (7) is mounted below the holes so that the outside air can enter the glasses section through the holes. A filter using paper or nonwoven fabric when only dust is used, and a filter using activated carbon or the like when filtering air containing an irritating gas or a toxic substance. The shell (3) of the mask portion is formed of plastic or the like having a high heat insulating property to prevent dew condensation due to exhalation. An intake valve (5) is provided on a portion of the mask shell that contacts the inside of the glasses portion, and an exhaust valve (6) is provided on the left and right sides at a lower portion on the lateral side that contacts the outside air.

In FIG. 3, the valve membranes (10) and (10) of the intake valve (5) and the exhaust valve (6) are made of an ultra-thin stainless steel plate or the like, and thin leaf springs (11) and (11) are connected thereto. The peripheral wall of the valve (9) (9) is made of silicon rubber etc.
The surface in contact with the leaflet is made acute. Each of these four valves is covered with a small cover so that the leaflets do not touch the skin.

[0010] Since the exhaled air from the exhaust valve is discharged in the lateral direction, the eyeglass see-through portion is not fogged from the outside.

The rubber band (8) is composed of a main band which hangs on the back of the head and an auxiliary thin band which passes over the cheek and is connected to the main band. Both ends of the main band are connected to the glasses, and both ends of the auxiliary band are connected to the mask so that the edges of the peripheral walls of the glasses and the mask are in close contact with the skin when worn on the face.

[Effects of the Invention] The present invention can be used continuously for a long time without any practical problems, while completely protecting the eyes and breathing, preventing fogging of the glasses see-through portion, and treating perspiration around the eyes. can do.

Although the structure is simple and the intake and exhaust valves must be made precisely, the whole product can be manufactured at low cost.

At the time when the cedar pollen is scattered, the outside temperature is still low, the combination of the mask and goggles is easily clouded, and the dustproof glasses whose eyes are not sealed cannot completely prevent the invasion of the pollen. Most patients use gauze masks or dust masks as a countermeasure for the disease. By using the protective mask of the present invention, the invasion of pollen can be almost completely prevented, and the symptoms of hay fever can be relieved.

[0015] Even when used for work, even when working in a prone position or under a condition with a lot of sweat, it is possible to secure a view without fogging, and to prevent dust and irritating gas floating in the air. In addition, the eye portion can be completely sealed from the outside air to protect it. Also, if one protective mask is worn, eyes and breathing can be protected at the same time, so that the trouble of separately wearing dust-proof glasses and a dust-proof mask is also improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a protective mask.

FIG. 2 is a side view of the protective mask.

FIG. 3 is a partially enlarged cross-sectional view of an intake valve and an exhaust valve along BB in FIG. 2;

[Description of Signs] 1 Transparent part 2 Peripheral wall of eyeglass part 3 Mask shell 4 Peripheral wall of mask 5 Intake valve 6 Exhaust valve 7 Filter 8 Rubber band 9 Valve peripheral wall 10 Valve membrane 11 Spring

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[Procedure amendment]

[Submission date] April 14, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

Claims (1)

[Claims] 1. A protective mask for preventing fogging of an inner surface of a see-through portion of glasses by introducing outside air into sealed glasses by using the expiration of respiration to lower the temperature and humidity inside the glasses.