JP6514466B2 - Fit checker built-in mask - Google Patents

Description

  The present invention relates to a fit checker built-in mask incorporating a fit checker capable of easily confirming the adhesion between the mask and the face when worn.

When wearing a dustproof mask or a gas mask, it is necessary to confirm that the mask and the face are in close contact with each other immediately after wearing the mask. For this purpose, there is a method of hand-pressing the inlet of the filter attached to the face to check for a leak, or a method of using a separate fit checker. In addition, for a mask in which a fit checker is embedded in the face, adhesion can be confirmed using that mechanism.

When performing a fit check by holding the filter inlet by hand, there is a possibility that the force pressing the face against the face may work, so the adhesion may not be confirmed correctly. The separate fit checker is cumbersome to install and remove, and may be lost during storage.
Incorporating a fit checker mechanism in the mask means incorporating a mechanism for blocking intake between the limited paths from the filter connection portion of the face to the inlet in the face, but when blocking, Since the leak should not occur, the mechanism becomes complicated and the necessary parts increase. In addition, providing a complicated mechanism in the ventilation path may cause a reduction in performance such as an increase in ventilation resistance because the ventilation area is narrowed. As measures against the increase in air flow resistance, there is also a method of widening the air flow path and lowering the air flow resistance by the fit checker mechanism, but in that case, it is necessary to enlarge the entire face to either the outside or the inside. There is. If it is enlarged outward, the amount of extension of the face from the face will be large, so it can be expected that the wearer's lower vision will be worse or it will interfere with work. In addition, since the face comes close to the wearer's face when enlarged inside, a part of the face that is not a face-piece may touch the wearer's face. In particular, since the intake valve opens and approaches the face at the time of intake, the possibility of contact with the wearer's mouth or nose is large. In that case, the wearer will feel very uncomfortable.

  Patent Document 1 discloses the following mask as a mask in which a fit checker is built in a face. That is, it has “a face that is capable of being evacuated and closely attached to the face, and a pair of suction cups provided on both sides of a center line that bisects the width of the face, and the cup A protective mask, wherein a bottom located closer to the face is connected to the face via a vent, and a top opposite to the bottom is formed so as to allow attachment and detachment of a filter, the inside of the cup comprising the cup. A shutter plate capable of sliding on a peripheral edge of the vent facing the bottom to open and close the vent; and a peripheral wall of the cup slidably from the shutter plate in an airtight state A slide bar extending to the outside of the cup is provided, and the slide bar extending to the width direction across the center line and extending to the outside of each of the pair of cups is provided outside the cup A cross bar connected to the end is provided, and when the cross bar reciprocates in a direction in which the slide bar extends, the shutter plate reciprocates so as to open and close the vent via the slide bar. And the venting hole is sealed when the shutter plate closes the venting hole. "This guarding mask is located on the bottom of the removable intake cup of the filter. There is a vent that leads to the inside of the face, and the vent has a shutter plate that can be opened and closed, a slide bar is provided at the end of the shutter plate, and the shutter plate passes through by moving the slide bar back and forth. It is possible to open and close the pores, so that it is possible to know the adhesion of the mask to the face It is coming.

JP 2007-181570 A

An object of the present invention is to provide a fit checker built-in mask which solves the above-mentioned problems and further improves the ease of checking the adhesion between a face and a face.

The gist of the present invention is a fit checker built-in mask including a filter, an intake valve attached to the inner side of a face through a ventilation path , and a fit checker mechanism that enables easy confirmation of adhesion between face and face. The fit checker mechanism has an intake valve presser that covers the outer shape of the intake valve, and the intake valve presser fixes the intake valve in a state of pressing it from the wearer to the face by using the intake valve presser to temporarily hold the ventilation path. It is a fit checker built-in mask characterized by interrupting .

  By incorporating the fit checker mechanism of the present invention into a face body, the adhesion between the face body and the face can be accurately confirmed without being lost like a separate fit checker. In addition, by pressing the intake valve inside the face from the wearer side, there is no need to provide a mechanism in the path from the filter connection portion to the inlet in the face, so the ventilation path becomes simple and the ventilation area becomes smaller. The adhesion between the face and the face can be easily confirmed.

Transverse cross-sectional view (with one filter) of the mask according to the present invention when worn normally Transverse cross-sectional view (with one filter) of the fit check of the mask according to the present invention Transverse sectional view (with two filters) of the mask according to the present invention at the time of normal wearing Transverse sectional view (with two filters) at the time of fit check of the mask according to the present invention Structural cross-sectional view of a lever part using a stretchable membrane (during normal installation) Structural cross section of the lever using stretchable membrane (at the time of fit check) Cross-sectional view of lever with screw structure (at normal installation) Cross-section of lever with screw structure (at the time of fit check)

The present invention will be described in detail.
The type of mask according to the present invention may be any mask for dust or toxic gas, and is not particularly limited depending on the type and number of filters used. Moreover, it is not limited by the shape and structure of the mask, such as a half surface and a whole surface.
The mask according to the present invention is provided with an air inlet communicating with the inside of the face body, and the air inlet has an air intake valve which is pressed from the wearer side to close the air intake valve and block the air passage. As an example of blocking the ventilation path, the following mechanism is provided.
That is, a filter is provided on one side, and an intake port leading to the inside of the face on the other side. An intake valve is provided at the intake port, and the intake valve is made of a soft and elastic material such as rubber. An intake valve retainer is attached to the intake valve, and a lever is provided at the center of the intake valve retainer, and the lever extends outside the flat body. During normal installation, external air passes through the filter and passes through the ventilation path to the air intake. In the present invention, by holding the intake valve from the wearer side and fixing it in a closed state, the ventilation path is temporarily blocked to confirm the adhesion between the face body and the wearer's face. As means for pressing the intake valve from the wearer side, the intake valve is temporarily closed by pulling the lever in the axial direction, and the vent path is shut off to check for an external leak.
In the present invention, a leak is checked by an intake valve holding lever. This intake valve is essentially one of the essential parts of the mask, and the number of parts can be reduced by utilizing the intake valve for a fit checker mechanism. It can be reduced. Furthermore, since the opening of the intake valve can be suppressed by the intake valve retainer at the time of normal mounting, it is possible to prevent a part of the intake valve from contacting the wearer. Therefore, the face can be brought close to the wearer's face without considering the maximum opening of the intake valve, and as a result, the amount of extension of the face can be reduced.

Next, the present invention will be described more specifically with reference to the drawings.
FIG. 1 is a cross-sectional view at the time of wearing of a mask to which one filter 2 according to the present invention is attached. A filter 2 is attached on the left side of the face as viewed from the wearer, and an air inlet is provided at a central portion inside the face through an air passage, and an intake valve 3 is attached. A lever 4 for operating the intake valve retainer 5 in the vertical direction from the intake port extends to the outside of the face body. The figure is an example, and the position of the filter 2 can be arranged at any position of the upper and lower sides and the center as well as the right and left, and the position of the inlet in the plane may not be at the central part.
FIG. 2 is a cross-sectional view of when the fit check of the mask shown in FIG. 1 is performed. By pulling the lever 4 in the direction away from the face body, the intake valve retainer 5 approaches the intake port and fixes the intake valve 3 in a closed state, so that the ventilation path is blocked.

FIG. 3 is a cross-sectional view of a mask having two filters 2 according to the present invention, which is usually mounted. The filter 2 is attached to the left and right of the face as viewed from the wearer, and an intake port is provided at the center of the inside of the face, and the intake valve 3 is attached. A lever 4 for operating the intake valve retainer 5 in the vertical direction from the intake port extends to the outside of the face body. The figure is an example, and the position of the filter 2 is not limited to left and right. Also, the position of the air inlet in the face may not be at the center. Further, the number of filters 2 is not limited to two, and can be further increased.
FIG. 4 is a cross-sectional view at the time of performing the fit check of the mask shown in FIG. By pulling the lever 4 in the direction away from the face body, the intake valve retainer 5 approaches the intake port and fixes the intake valve 3 in a closed state, so that the ventilation path is blocked.

The lever 4 extends from the inside to the outside of the face and must be movable at least for opening and closing the intake valve retainer 5. However, the inside and outside of the face must be completely shut off except through the filter 2, and the mechanism of the lever 4 is no exception. In addition, it is preferable that the intake valve retainer 5 be fixed in an open state during normal installation. An example of a structure effective to satisfy these conditions is shown in FIG.
A membrane 6 made of a stretchable, dust- and gas-impermeable material is connected to the shaft and face of the lever 4 so as to block the inside and outside of the face. Since the membrane 6 has elasticity, the lever 4 can be pulled in the axial direction at the time of fit check, and the intake valve 3 is pressed to shut off the ventilation path. After the fit check, the elasticity of the membrane 6 causes the lever 4 to be fixed without movement unless it is subjected to force in order to return to the position at the normal mounting time.
FIG. 6 is a cross-sectional view of the mechanism shown in FIG. 5 when performing a fit check.

  Another example is shown as a method of fixing the intake valve retainer 5. The intake valve retainer 5 can be opened and closed by screwing the lever 4 and the face side and opening and closing the screw. FIG. 7 shows the intake valve retainer 5 in the open state, and FIG. 8 shows the closed state. In this case, since the blocking inside and outside the face body is not sure, it is necessary to block by the O-ring 7 or the like.

  As described above, the fit checker built-in mask according to the present invention is extremely useful because it can easily confirm the adhesion to the face.

1 face body 2 filter 3 intake valve 4 lever 5 intake valve retainer 6 membrane 7 O ring

Claims (4)

A fit checker built-in mask including a filter, an intake valve attached to the inside of a face through an air passage, and a fit checker mechanism for facilitating confirmation of adhesion between the face and the face , wherein the fit checker mechanism Has an intake valve presser that covers the outer shape of the intake valve, and is fixed in a state where the intake valve is held from the wearer side to the face side by the intake valve presser to temporarily shut off the ventilation path. Fit checker built-in mask. 2. The fit checker built-in mask according to claim 1, wherein the ventilation path is temporarily blocked by the intake valve retainer and a lever extending outward from the intake valve retainer. The fit checker built-in mask according to claim 1 or 2, wherein blocking inside the face and inside the face and fixing of the intake valve holder are performed with a stretchable membrane. The fit checker built-in mask according to any one of claims 1 to 3, wherein the intake valve retainer can be fixed by screwing the face body and a shaft for operating the intake valve retainer.

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