JPH0432116Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a half-face mask mainly used for gas prevention.

Conventional technology Conventionally, the entire facepiece that forms the frame of this type of half-face mask is bowl-shaped, and because there is a large void inside the facepiece, a portion of the exhaled air remains inside the mask each time the air is exhausted. This made it difficult to wear them continuously for long periods of time while working. In addition, the dead space obstructed the vision of the mask wearer.

Problems to be Solved by the Invention The present invention has been made with the aim of solving the above-mentioned drawbacks of the conventional half-face mask and providing a half-face mask with a good appearance.

Means for Solving the Problems: A mask face piece formed by injection molding of a synthetic resin material is provided with an intake port at a location immediately in front of the wearer's nostrils, and an intake valve is provided at the intake port,
A root frame for attaching the filter case to the front side is connected to and protrudes from the outside of the intake port, and an exhaust port with an exhalation valve attached to the top of the mask face piece is separately provided, and the inside of the mask face piece is connected to the face. The face piece cover is formed as shallowly as possible close to the uneven portion, and covers the front side including the exhaust port except for the periphery of the mask face piece, leaving a required gap, and the face piece cover that guides exhalation to the outside of the mask is attached to the filter. It is divided into a main part and a lower part so as to be sandwiched from both sides of the upper and lower halves of the root frame of the case, and both sides of the main part are used as head strap hanging parts. The half-face mask is further characterized in that removable connection holes and connection locking claws are provided at the lower ends of both sides of the lower half of the main part and at the upper ends of both side edges of the lower part.

Function: Since the exhaust port is provided at the upper part of the mask face piece, this device can form a mask face piece that can be worn as close to the face as possible without leaving any dead space, thereby eliminating residual exhaled air. It allows you to breathe fresh purified air and use it continuously for a long time. In addition, this prevents sweat that drips from the face and water droplets from exhalation from accumulating in the exhalation valve and degrading the valve function, and an exhaust port appears on the upper part of the mask facepiece, making the front surface unconventional. Although it naturally looks inconspicuous, the front face is covered with a mask cover, which significantly improves the appearance.The mask cover also protects the exhaust port, and the mask cover has a similar shape to the mask facepiece. The gap constitutes a discharge path for exhaled air, which can be discharged to the outside of the mask from a required location, for example, through a discharge notch provided at the bottom of the gap. In addition, the mask cover can be separated into upper and lower parts and removed for cleaning, and the protrusion of the attachment frame equipped with the filter case from the mask face piece can be reduced.

Embodiment Hereinafter, the present invention will be explained with reference to an embodiment shown in the drawings.The inlet 3a of the mask face piece 1 formed by injection molding of a synthetic resin material is located just in front of the wearer's nostrils, similar to the conventional mask face piece. Set up at a specific location,
An intake valve 3 is provided at the intake port 3a, and a root frame 8 for mounting the filter case 2 on the front surface is formed in communication with and protrudes from the outer surface of the intake port 3a. An exhaust port 5 equipped with an exhalation valve 4 is provided at the upper front position, and the inside of the mask face piece 1 is formed as shallowly as possible so as to be close to the uneven parts of the face, and the exhaust port 5 is provided at the upper front position, excluding the periphery of the mask face piece 1. A facepiece cover 7 that covers the front side including 5 with a required gap 6 is sandwiched between the upper half 8a and the lower half 8b of the rooting frame 8 of the filter case 2 from both sides, It is divided into a main part 7a and a lower part 7b, and both sides 7 of the main part 7a are formed separately.
Head strap hooks 9, 9 are provided inside a1, 7a1,
Further, a guide hole 10 into which the head strap 14 to be hung on the head strap hooks 9, 9 is drawn into the both side portions 7a1, 7a1,
10, and the lower part 7b is provided with cutouts 7b1, 7b1 which serve as an outlet for mainly discharging exhaled air to the outside of the mask, and furthermore, the main part 7a is provided with cutouts 7b1, 7b1 on both sides 7a1, 7a.
1 and the upper ends of both side edges of the lower part 7b are provided with a connecting hole 11 and a connecting locking claw 12, which are removable.

In addition, 13 is a face contact member.

Effects Since the present invention is constructed as described above, the inner gap of the mask face piece is significantly narrowed unlike the conventional bowl-shaped face piece, and the function of the mask is significantly improved. be. That is, the intake and exhalation of the inside of the mask facepiece is carried out smoothly, the exhaled air does not stagnate, and therefore, even if the mask is worn continuously for a long period of time, there is little feeling of fatigue. In addition, because the exhaust port is located at the top, there is no possibility that sweat dripping from the face and water droplets from exhaled breath would accumulate in the lower exhalation valve and obstruct its function, as in the case of conventional methods. Because of the structure described above, the exhaust port appears on the upper part of the mask facepiece, making the front surface look unnatural and unattractive, but the front surface is covered by the mask cover. Therefore, the design of the cover significantly improves the appearance and therefore makes it smart. Further, the exhaust port is protected by the facepiece cover, and contact with the exhaust port can be prevented. In addition, the facepiece cover forms a discharge path for exhaled air in the gap between it and the mask facepiece, leading it to the bottom, for example, and letting it out of the mask through the outlet provided at the bottom, so that the exhaled air does not directly hit the glasses. It is something that can be done. In addition, the face piece cover can be separated and removed, making it easy to clean and maintain good hygiene. In addition, as mentioned above, the mask face piece has the exhaust port at the top of the lower part of the conventional mask face piece, so the protrusion of the root frame equipped with the filter case can be reduced, and the field of vision obstructed by the filter case can be reduced. It is possible to obtain a good field of view with a significantly reduced field of view compared to the conventional one.

Therefore, it is possible to provide an innovative half-face mask that is downsized as a whole, has excellent functions for inhaling and expelling air from inside the mask, provides a good field of vision, and allows sufficient sanitary control.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of the entire half-mask, Fig. 2 is a central vertical sectional view of the mask facepiece, and Fig. 3 is a rear view of the facepiece cover in a divided state. FIG. 4 is an explanatory diagram showing an exploded view of the entire half mask. 1...Mask facepiece, 2...Filter case,
3...Intake valve, 3a...Intake port, 4...Exhalation valve,
5... Exhaust port, 6... Gap, 7... Mask cover,
7a...Main part of facepiece cover, 7a1...Both sides, 7
b... Lower part of face piece cover, 7b1... Notch, 8...
Rooting frame, 8a... Upper half of the rooting frame, 8b... Lower half of the rooting frame, 9... Head strap hook, 10... Guide hole, 1
1... Connection hole, 12... Connection locking claw, 13...
...Face contact member, 14... Head strap.

Claims (1)

[Scope of utility model registration request] An intake port of the mask facepiece formed by injection molding of a synthetic resin material is provided at a location immediately in front of the wearer's nostrils, and an intake valve is provided at the intake port,
A root frame for attaching the filter case to the front side is connected to and protrudes from the outside of the intake port, and an exhaust port with an exhalation valve attached to the top of the mask face piece is separately provided, and the inside of the mask face piece is connected to the face. The mask cover is formed as shallowly as possible close to the uneven portion, covers the front side including the exhaust port except for the periphery of the mask face piece, and leaves a required gap, and guides exhaled air to the outside of the mask. It is divided into a main part and a lower part so as to be sandwiched from both sides of the upper and lower parts of the root frame of the filter case, and both sides of the main part are provided with a head strap hooking part. A half-face mask, further comprising removable connection holes and connection locking claws at the lower ends of both sides of the lower half of the main part and at the upper ends of both side edges of the lower part.