JPS6028509B2 - oxygen generating mask - Google Patents

Description

[Detailed description of the invention] The present invention relates to an oxygen generating mask.

An object of the present invention is to provide an oxygen generating mask that is easy to construct and whose oxygen generating agent can be easily replaced.

The invention will be illustrated with reference to one embodiment of the oxygen generating mask shown in FIG.

A half-mask 2 that covers the mouth and nose is attached to the inside of the lower part of the hood 1 that covers the head and face.

Further, a breathing bag 3 is provided on the outside of the lower part of the hood 1.
The breathing bag 3 consists of two layers: an outer bag 4 and an inner bag 4'. At the top of the breathing bag 3 are oxygen generating cans 5, 5 filled with an oxygen generating agent. The lids of the oxygen generating cans 5, 5 are exposed to the outside of the breathing bag 3, respectively. Oxygen generating can 5
, 5 are connected to the half mask 2 via exhalation valves 6, 6 (hidden in FIG. 1 and not clearly shown). The oxygen generating cans 5, 5 are each provided with numerous discharge holes 7, . . . , 7. The lower part of the half mask 2 is connected to the inside of the cooling tube 9 inside the breathing bag 3 via the intake valve 8. The cooling tube 9 has a built-in spring 11 that reaches the bottom of the inside of the breathing bag 3 and has a collar 10 at the bottom. A hundred bands 12 on one side of the hood 1
is fixed. The free end 13 of the neckband 2 is connected to the opposite side of the hood by fasteners. breathing bag 3
Even when not in use, the tsuba is filled with air without collapsing. This air is used for breathing during the initial stage of wearing the mask. The breath exhaled into the half mask enters the oxygen generating cans 5,5 through the exhalation valves 6,6.

In the oxygen generating cans 5, 5, high temperature oxygen is generated by the reaction between carbon dioxide gas and water in exhaled breath and the oxygen generating agent. This oxygen and exhaled air are the discharge holes 7 of the oxygen generating cans 5, 5,...
, 7 is released from the can, flows down between the inside of the breathing bag 3 and the cooling tube 9, then ascends the cooling tube 9 expanded by the spring 11, passes through the intake valve 8, and enters the half-face mask. 2
Reach within. By the time this high temperature gas reaches the intake valve 8,
It is cooled to a temperature that is safe for inhalation, for example, 4.0 or less. There is no particular limit to the internal volume of the breathing bag 3, and it is usually 8 to 4 volumes.

Further, the strength of the spring 11 is such that, for example, when the internal volume of the breathing bag 3 is 8, when the breathing bag 3 is released from the collapsed state, 4 the outside air is transferred to the exhalation valve 6 and the oxygen generating cans 5, 5.
The strength is such that less than 2 pieces of rat sand can be sucked into the breathing bag 4 through the process. Further, it is preferable that the material of each member has higher heat resistance and/or flame retardancy.

In particular, the inside of the breathing bag 3 is filled with a high oxygen concentration, for example, 40% or more, so there is a risk of ignition and combustion at high temperatures. To prevent this risk, it is preferable that the material be thermally insulating, heat resistant and flame retardant. Incidentally, the outer bag 4 of the breathing bag shown in FIG. 1 is made of heat-resistant fiber cloth coated with aluminum, and the inner bag 4' is made of a nylon-Surlyn composite film. However, the breathing bag 3 may have one layer as long as it satisfies the above requirements. The lids of the oxygen generating cans 5, 5 are exposed on the outside of the breathing bag 3, and the lids of the oxygen generating cans 5, which are exposed at the front of the breathing bag 3, can be removed without removing the oxygen generating can 5 itself from the breathing bag. The oxygen generating agent can be replaced by simply removing it.

Note that the lid of the oxygen generating can 5 is attached to the main body of the oxygen generating can 5 with a flange. Inside the oxygen generating can 5, the powdered or granular oxygen generating agent is sandwiched between two mat-like filters to prevent it from moving inside the can and being unevenly distributed, and is pressed from the outside toward the center of the can by a restraining spring. It is being

FIG. 1 illustrates one embodiment, and there may be various other modifications.

That is, for example, regarding the position where the lid of the oxygen generating can 5 is exposed, in addition to the above-mentioned location, there is also the position where the lid of the oxygen generating can 5 is exposed.
}The upper surface of the breathing bag 3, the side surface of the breathing bag 3, etc. can be used.

Among these, the shape of the oxygen generating can may be cylindrical or prismatic, and the shape of the oxygen generating can is not particularly limited. (The opening and the opening are suitable when the shape of the oxygen generating can is cubic. Also, the lid can be screwed in when the shape of the oxygen generating can is cylindrical. Especially as an oxygen generating agent, there are no restrictions. However, sodium peroxide (Na
202) and potassium superoxide (KO2), of which the latter is preferred.

In addition, in the case of a substance that promotes the generation of oxygen, for example, potassium superoxide, hopkalyte, oxidized steel, etc. can be used in combination. The hood is made of elastic sheet or cloth.

Preferred examples of the stretchable sheet or cloth include sheets such as rubber sheets, yarns of high elasticity fibers such as rubber threads or spantex, and knitted and woven fabrics of so-called cored yarns having these yarns as cores. Also, the neck band is made of a sheet or cloth similar to a head hood, or an elastic string.

The means for connecting the free end of the neck band to the other legs of the hood is not particularly limited, but typically fasteners, hooks, etc. are used. Note that the neck band can also be omitted.
Half-face masks can be made of synthetic rubber, natural rubber, or synthetic resin, as long as they are flexible and conform to the shape of the face.

The front of the hood is cut out near the center so that the outside can be seen.

A transparent sheet made of glass or synthetic resin can also be attached to this cutout. The oxygen mask of the present invention is an oxygen generating mask that is easy to wear and whose oxygen generating agent can be easily replaced.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway overall perspective view of an oxygen mask of the present invention. In FIG. 1, 1...a hood, 2...a half mask, 3
...Breathing bag, 4 and 4'...Outer bag and inner bag of the breathing bag, respectively, 5...Oxygen generating can, 6...Exhalation valve, 7.
...Discharge hole, 8...Intake valve, 9...Cooling cylinder, 10...
Tsuba, 11...Spring, 12...Neck band, 13...
・Free neck band.

Claims (1)

[Claims] 1. A hood that covers the head and face has a half-mask that covers the mouth and nose on the inside of the lower part, and a breathing bag with an oxygen generating can is installed on the outside of the lower part of the hood. The oxygen generating can is connected through an exhalation valve, and the oxygen generating can and half mask are sequentially connected to the inside of the breathing bag and through the inhalation valve, and the lid of the oxygen generating can is exposed to the outside of the breathing bag. mask.