JPS5950345B2 - oxygen breathing mask - Google Patents

Description

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

In the event of a fire, a factory disaster, a mine disaster, or an oxygen deficiency disaster where harmful gases are generated, so-called gas masks are of no use, and breathing apparatus equipped with an oxygen source are often required.

Respiratory devices include a combination of an oxygen cylinder or chemical oxygen generator and a breathing mask, or a combination of these with a system for recovering and reusing exhaled oxygen (closed circulation breathing device). No matter what type of mask you have, it is essential to have a mask that allows you to inhale only oxygen gas without inhaling harmful gases.

The quality of the oxygen breathing mask (hereinafter referred to as a mask) in a breathing apparatus has an extremely large effect on the operability, comfort, safety, etc. of the entire breathing apparatus, so much research has been conducted from early on to improve masks. .

However, the conventionally proposed masks still have many points to be improved.

In other words, a mask, which is an equipment used in an emergency situation such as a disaster, must: 1) be as lightweight and simple in structure as possible, and be able to be worn easily and quickly without special training; 2) be free from the risk of inhaling harmful gases ( (i.e. good airtightness); ■ Sufficient consideration must be given to protecting the eyes and head from irritating gases, smoke, sparks, dust, etc.; ■
It is necessary that the wearer does not feel pressure on the face or head and that the wearer can wear it for a long time, but conventional products have been extremely unsatisfactory in these respects.

The present invention was completed based on research conducted for the purpose of providing a better mask against the background of the current situation.

First, an outline of the mask according to the present invention will be described.
This mask mainly consists of three parts: a breathing chamber part (mask in the narrow sense) that airtightly surrounds the user's mouth and nose, a hood-shaped part that covers the user's head, and a glasses part, which are connected together. has been done.

The hood-shaped part protects the user's head and also has the role of supporting and fixing the mask together with the mask fixing band described later.
It has a band-shaped non-stretchable part that extends from the top (where it connects to the glasses) to the bottom of the back.

In addition to appropriately attaching breathing tubes (or their connectors), voice plates, microphones, etc. to the breathing chamber, a semi-fixed breathing chamber pressing plate is placed on the front.

Then, one mask fixing band is attached to each of the left and right ends of the press plate.

The mask fixing band has a length that allows it to be passed through the annular metal fitting attached to the lower end of the back of the hood-shaped part and folded back, and the folded band is overlapped with the band on the wearing part side. A face-to-face fastener is sewn onto the surface of the band so that the bands can be joined together with just a single touch.

The present invention will be explained below using specific examples with reference to the drawings.

1 and 2 are diagrams showing an example of a mask for a closed circulation breathing apparatus according to the present invention, in which FIG. 1 is a front view, and FIG.
The figure is a side view.

In both figures, 1 is a hood, 2 is a pair of glasses, and 3 is a breathing chamber, which are partially sewn and firmly and airtightly adhered.

The hood 1 is made of a thick, stretchy knit made from a mix of nylon filament and spandex.
As shown in the figure, this is sewn into a standard hood shape that fits tightly around the head.

4 is a seam used when sewing the hood, but since a non-stretchable cloth tape is sewn together with the hood material, this part is the only seam that is not stretchable.

Such a non-stretchable portion extends from the front of the hood (the joint with the glasses 3) to the lower end of the back of the hood, thereby serving as a support band for the entire mask.

The non-stretchable part is provided with two strips in the example shown in the figure, but it is not limited to this, and the number of non-stretchable parts is one to several, taking into account the weight of the mask, the elongation stress of the hood material, the method of forming the non-stretchable part itself, etc. An appropriate number of articles is sufficient.

The above-mentioned hood material has the advantage of being breathable and making the mask feel good, but on the other hand, it does not have the ability to block smoke and harmful gases.

If the hood is made of a non-breathable material, the airtightness of the eyeglasses and breathing room can be improved.

When using non-breathable materials, it is desirable that the hood not cover the ears so that outside sounds can be heard clearly and the outside temperature can be determined by the ears.

The glasses 2 are made of a curved polycarbonate resin plate, which is fixed so as to slightly protrude from the hood.

On the inside of the hood, a raised part of soft rubber is provided along the periphery of the glasses, and by bringing this part into close contact with the face, the airtightness of the glasses part is maintained.

The breathing chamber 3 is made of synthetic rubber and is designed to fit tightly around the user's mouth and nose to form a small space.

5 is a check valve sealing fitting for an inhalation pipe that sends oxygen into the breathing chamber; 6 is a check valve sealing fitting for an exhalation pipe that discharges exhaled air;
7 is a speech transmission board for conversation (three metal plates with many small holes and one plastic film stacked on top of each other with a small interval), but the structure and arrangement of these are limited. It's not something.

8 is a breathing chamber pressing plate made of an aluminum alloy plate with a thickness of about 1 mm.

As can be seen from Figure 3, which shows the pressure plate removed from the mask, it is shaped like a frame of glasses without lenses, and is not fixed to the mask, but has two holes for attaching the intake pipe. It is secured to the front of the breathing chamber by fitting the tool 5 and the exhalation tube fitting 6 together.

Mask fixing bands 9 and 10 are attached to the left and right ends of the press plate 8.

These bands are passed through the annular metal fittings 11 and 12 (not visible in Figures 1 and 2 because they are located on the left side in a symmetrical position with the annular metal fitting 11) at the lower end of the back of the hood 1, and then
A small plastic ball 13 is attached to the tip to prevent it from falling out of the annular fitting.

Approximately half of the band has a loop-shaped member 14 of a face-to-face fastener sewn to the attachment part side, and a hook-shaped member 15 of the same fastener to the tip end (both are sewn on the opposite side of the band's hood). on the side surface).

When wearing a mask, it is only necessary to operate the mask fixing band 9.10.

That is, as shown in Figure 2, with bands 9 and 100 fasteners released, place the hood over your head while aligning the breathing chamber with your mouth and nose, pull the ends of bands 9 and 10 strongly forward, and fold them back. The overlapping portion is overlapped with a portion closer to the mounting portion than the annular metal fitting, and the overlapping portion is joined using a surface bonding fastener.

In this state, the weight of the entire mask is supported primarily by the non-elastic seams 4 of the hood as described above, while being fixed in the horizontal direction by the bands 9, 10 and the pressing plate 8.

Since the bands 9 and 10 are not directly attached to the breathing chamber or the jaw of the hood, but are connected to a highly rigid pressing plate, the tension exerted by the bands 9 and 10 is applied to the breathing chamber from the front. It is converted into a force that evenly presses against the face.

Therefore, when the mask is worn, there is no deformation of the breathing chamber that would prevent the mask from coming into close contact with the face, particularly the bridge of the nose, and a highly airtight wearing state is achieved.

In order to fully exert the above-mentioned breathing chamber pressing effect, the pressing plate must not be fixed to the breathing chamber near the left and right mask fixing band attachment parts.

Even if it is simply fixed so that it does not fall off the mask when not in use, it is desirable that the fixed location be near the center of the front of the breathing room.

As the pressing plate, in addition to various metal plates, a hard plastic plate or the like can be used.

The shape is arbitrary and may be slightly curved to match the surface of the breathing chamber.

It is not necessary to cover the entire breathing chamber, and it is usually sufficient to cover 20 to 80% of the surface of the breathing chamber.

As is already clear from the above description, the mask according to the present invention has a unique structure that is significantly different from conventional products, and has many advantages as described below.

(a) A unique support and fixation method using a hood-shaped part made of stretchable material and a pressure plate is adopted, so it fits well on the face of any user and provides a highly airtight wearing condition. is realized.

(b) The operation required to put on the mask is extremely simple, and anyone can put it on quickly and reliably.

Moreover, since the hood-shaped part, the glasses part, and the breathing chamber part are integrated, the protection of the head, eyes, and respiratory system can be completed all at once.

(c) There are no bands that touch the face or head directly, and the weight of the mask and the tightening force for fixing it are dispersed by the hood, so it is comfortable to wear and reduces fatigue even when worn for a long time.

[Brief explanation of the drawing]

1 and 2 show an example of a mask according to the present invention, with FIG. 1 being a front view and FIG. 2 being a side view. FIG. 3 is a perspective view of the pressure plate of the mask of FIGS. 1 and 2. FIG. 1: Hood, 2: Glasses, 3: Breathing chamber, 4: Seam, 5: Inhalation tube connector, 6: Expiration tube connector, 7: Voice plate, 8: Pressing plate, 9, 10: For fixing the mask Band, 11.12: Annular metal fitting, 13 Niblastic small ball, 14, 15: Surface bonding fastener.

Claims (1)

[Scope of Claims] 1. In an oxygen breathing mask, a breathing chamber part that airtightly surrounds the user's mouth and nose is integrally combined with a hood-like part that covers the user's head and a glasses part, and the hood-like part has a slight elasticity, but has a band-shaped non-stretchable part that extends from the front through the top to the lower end of the back, and a semi-fixed breathing chamber pressing plate is placed at the front of the breathing chamber, and the left and right sides of the pressing plate are placed on the front of the breathing chamber. One mask fixing band is attached to each end of the mask fixing band, and the mask fixing band has a length that allows it to be passed through the annular metal fitting attached to the lower end of the back of the hood-shaped part and then folded back. In addition, an oxygen breathing mask characterized in that a face-to-face fastener is sewn onto the surface of the band so that the bands can be joined simply by overlapping the folded band with the band on the wearing part side.