JP3237535U - Working face mask - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work face mask provided with a dustproof function in which a lens surface of a goggle portion is not fogged. SOLUTION: A goggle portion 1 having a lens surface 11 on the front surface and attached to a portion around the eyes of the face in a sealed state, a nose portion and a mouth portion are covered in a sealed state, and intake can be performed through a filter function. The mask portion 2 provided with the intake ventilation portion 22 and the exhaust ventilation portion 23 is integrated by partitioning both the mask portion and the goggles portion by a partition portion, and a head mounting portion 3 that can be mounted on the face is attached. In the work face mask, the partition part (triangular top) 211 is closed by the pressure increase in the mask part due to exhalation to prevent the exhaled air from entering the goggles part, and the goggles part 1 is the lens of the goggles part. An outside air introduction portion 15 having a small through hole formed and sealed with a filter is provided at an appropriate position of the frame portion 12. [Selection diagram] Fig. 2

Description

The present invention relates to a work face mask used for work in an environment where dust is scattered, such as polishing work.

The face mask that prevents the suction of dust during work and protects the eyes has a transparent front surface (lens surface) that does not obstruct the vision, and is suitable for work purposes so as not to inhale dust and harmful gas to the human body. It is provided with a filter so that exhalation during respiration is performed through the filter. In particular, as a means for adopting a simple structure, a structure in which a goggle body and a mask body are combined and integrated is known.

Further, since the work is hindered when the lens surface becomes fogging, various anti-fog mechanisms have been proposed for the work face mask. A structure for providing an anti-fog function has also been proposed for a face mask in which the goggle body and the mask body are combined and integrally connected, which is adopted for simplification of the structure.

For example, Patent Document 1 has a structure in which an intake hole provided with a filter is provided in the goggles portion, a check valve is provided in the connecting partition portion between the goggles portion and the mask portion, and a discharge valve is provided in the mask portion to exhibit an anti-fog function. Is disclosed. That is, the intake air of the mask wearer has a structure in which the outside air is sucked into the goggles portion, passes through the check valve and is taken into the human body, and the exhaled breath is discharged from the inside of the mask portion through the exhaust valve.

In the work mask disclosed in Patent Document 1 described above, all the intake air of the worker is sucked from the inside of the goggles portion, and in order to easily perform the intake air (breathing), the intake air provided with a filter for introducing outside air into the goggles portion is provided. The holes need to be made reasonably large. Then, the goggles portion becomes unnecessarily large, and an air flow in front of the eyes is generated with each breath, which is not practical.

Patent Documents 2 and 3 have a structure proposed by the inventor of the present application, in which an intake portion equipped with a filter is provided in the mask portion, and a ventilation portion having a check valve function is provided in the partition portion from the goggles portion. Respiratory air is performed only in the mask portion, and the antifogging function is realized by exchanging a part of the air in the goggles portion through the ventilation portion that opens and closes by the pressure change in the mask portion during breathing.

Japanese Unexamined Patent Publication No. 11-290473. Japanese Unexamined Patent Publication No. 2020-116139. Japanese Patent Application Laid-Open No. 2022-7931.

The working face mask disclosed in Patent Document 1 has a configuration in which the goggles portion allows all of the inspiration during respiration to pass through, which is impractical. Further, Patent Documents 2 and 3 partially replace the air in the goggles portion by the difference in the air pressure between the goggles portion and the mask portion. Depending on the operating time, the replacement amount may be insufficient.

Therefore, the present invention proposes an improved structure that complements the anti-fog function in the working face mask disclosed in Patent Documents 2 and 3.

In the work face mask according to the present invention, the face contact portion of the lens frame portion having the lens surface on the front surface is used as the elastic edge portion, and the goggles portion and the nose portion which are attached in a sealed state by covering the upper portion of the face and the nose portion. The mask portion is formed so as to cover the mouth portion in a closed state, and is provided with an intake ventilation portion provided with a filter and an exhalation discharge portion provided with a check valve for discharging and closing the exhaled air. The head mounting part that allows the goggles and mask to be worn on the face while maintaining a sealed state by connecting and integrating the wearing space of the part and the wearing space of the goggles so that they are partitioned by a predetermined partition. A working face mask with a valve that closes to the partition by increasing the pressure inside the mask due to exhalation to prevent the exhaled air from entering the goggles and opens in response to the decrease in pressure inside the mask due to intake air. It is characterized in that an anti-fog ventilation portion provided with the above surface and an outside air introduction portion sealed with a filter while forming small through holes are provided at appropriate positions in the lens frame portion of the goggles portion.

Therefore, the above-mentioned work face mask is used for work in a dusty environment such as polishing work, and when it is attached to the worker's face with the head mounting part, the worker's eyes, nose, and mouth are goggles. It will be covered with the part and the mask part, and the worker's breathing will be done through the intake ventilation part equipped with the filter provided in the mask part, and most of the exhaled air (especially the intake ventilation part in the discharge direction). If a check valve that blocks the passage of air is provided, all of the exhaled air) will be released to the outside air from the exhaled air exhaust part, and all of the inspiratory air will be taken through the filter. Inhalation is blocked and the eye is protected by the goggles.

Further, the anti-fog on the lens surface of the goggles portion of this face mask is performed by the air flow and the outside air introduction portion in the anti-fog ventilation portion. The inside of the mask part and the inside of the goggles naturally coincide with the atmospheric pressure, but the pressure inside the mask part fluctuates due to breathing. In inspiration, the pressure in the mask portion decreases, and in exhalation, the pressure in the mask portion increases. That is, the outside air flows into the mask part due to the intake air, and the air in the goggles part pushes out the valve body of the anti-fog ventilation part formed of the film body into the mask part as the pressure inside the mask part decreases due to the suction resistance of the filter. leak.

When the air in the goggles part flows out into the mask part through the anti-fog ventilation part and the pressure inside the goggles part decreases, the outside air enters the goggles part from the outside air introduction part through the filter. However, the ventilation portion of the outside air introduction portion is a small through hole, and the filter is interposed, so that the inside of the goggles portion does not immediately become an atmospheric pressure state. Also, regarding the operation of the valve body in the dustproof ventilation part, the valve body made of a film body is also in the normal position until the pressure in the mask part increases and the valve body closes, that is, from the end of the intake operation to the start of the next exhalation. It returns to (the valve opening closed position) naturally. Air (outside air that has flowed into the mask portion) flows into the goggles portion by the time of the return.

Further, when the air pressure in the mask portion increases due to the start of exhalation, the valve body of the ventilation portion closes and prevents the exhaled air having high humidity from entering the goggles portion. Therefore, a part of the air in the goggles portion is replaced with the outside air with each breath, and the fogging of the lens surface is prevented by repeating the partial replacement of the air in the goggles portion.

The configuration of the present invention is as described above, and it is possible to realize the simplification and miniaturization of the work face mask equipped with the goggles part with the enhanced anti-fog function.

The front view (attached state) which shows the embodiment of this invention. The same downward perspective view. In the explanatory diagram of the breathing air at the time of the same use, (a) shows the state immediately after the end of inspiration at the time of exhalation (b) and at the time of inspiration (c). In the operation explanatory diagram of the anti-fog ventilation part, (a) indicates when the valve is closed and (b) indicates when the valve is open.

Next, an embodiment of the present invention will be described. The working face mask shown in the embodiment is composed of a goggle portion 1, a mask portion 2, a head mounting portion 3, and a mask portion urging mechanism portion 4.

The goggle portion 1 has a shape that covers the upper portion of the face, has a lens surface 11 on the front surface, the lens surface 11 is held by the lens frame portion 12, and the portion of the lens frame portion 12 in close contact with the face is appropriately cushioned. An elastic edge portion 13 formed of a material is used, belt connecting portions 14 are provided at both ends of the lens frame portion 12, and an outside air introduction portion 15 is provided at an appropriate position of the lens frame portion 12. The outside air introduction portion 15 is formed with small through holes and sealed with a filter.

The mask portion 2 has a front triangular cylinder shape so as to cover the nose portion and the mouth portion in a sealed state as compactly as possible, and a covering frame portion 21 formed of a rubber material having a folded shape around a peripheral portion serving as a face contact point. The intake ventilation portion 22 provided on the front surface of the covering frame portion 21, the exhaust ventilation portion 23, the anti-fog ventilation portion 24, and the belt mounting portion (which constitutes the urging mechanism portion) 25 are provided.

The covering frame portion 21 has a front triangular tubular shape, and the goggles portion 1 and the mask portion 2 have a “dogleg” shape in the vertical direction with the triangular top portion 211 intruding into the lower center portion of the lens frame portion 12 of the goggles portion 1. It is flexibly connected and integrated in a "shape" so that the space for wearing the mask portion 2 and the space for wearing the goggles portion 1 are partitioned by the triangular top portion 211 as a partition portion.

The intake air venting portion 22 has a tubular through-cylinder portion 221 projecting from the front surface of the covering frame portion 21, a filter 222 internally provided in the through-cylinder portion 221 and an intake check valve between the intake and ventilation portion 22 and the space inside the mask portion. 223 is provided. If the above configuration is adopted, there is an advantage that the filter can be selectively mounted depending on the type of work. However, without adopting the above configuration, a vent hole of an appropriate size is simply provided on the front surface of the covering frame portion 21, and the through cylinder A simple structure in which a filter is provided in the portion 221 may be adopted.

The discharge ventilation portion 23 is provided on the side surface portion of the covering frame portion 21, and a discharge valve (check valve) 232 formed of a film is arranged on the outside of the discharge ventilation hole 231 to form a pressure inside the mask portion 2 during exhalation. It becomes an open state at, and it is sealed at the time of intake.

The anti-fog ventilation portion 24 is provided in the center of the partition portion (triangular top portion) 211, and is composed of a ventilation hole portion 24a and a valve body 24b. A crosspiece 242 is passed to the ventilation hole portion 24a and an appropriate ventilation hole 241 to provide a valve body mounting hole in the crosspiece 242, and the valve seat surface 243 and the outer peripheral ridge portion 244 are provided on the outer peripheral edge of the ventilation hole 241. Is provided.

The valve body 24b is a thin silicon resin rum body that is often used for work masks, and is formed in a concentric stepped shape of the same thickness to ensure appropriate shape retention, and the valve shaft 245 protrudes in the center. In the natural state (when there is no fluctuation in the internal and external pressure), the valve seat surface 243 and the outer peripheral surface of the valve body 24b are brought into contact with each other, and the ventilation hole 241 is provided in the valve body 24b. Is completely closed.

The head mounting portion 3 is a mounting belt mounted on the goggles portion 1, and a base end is connected to the belt connecting portion 14 of the goggles portion 1, and an appropriate connecting member for connecting the belts to each other is provided on the other end side. It is something that is.

The mask portion urging mechanism portion 4 is composed of a rubber band having one end connected to the belt mounting portion 25 of the mask portion 2 and the other end connected to the belt connecting portion 14 of the goggles portion 1. The mask portion 2 is pulled in the direction of the goggles portion 1 to urge the goggles portion 1 to form a “dogleg” shape.

Therefore, this mask is used for work in a dust environment such as polishing work, and the face is covered with the integrated goggles part 1 and mask part 2 and the wearing belt (head wearing part) 3 is attached. Tighten the goggles and the mask 2 so that they are in close contact with each other on the face.

In particular, since the mask portion 2 is urged in the back direction (face direction) by the rubber belt (mask portion urging mechanism) 4, when the goggles portion 1 is brought into close contact with the face, the mask portion 2 also naturally comes into close contact with the face. Therefore, by attaching the face mask to the head with the belt of the head attachment portion 3, the goggles portion 1 and the mask portion 2 are closely attached to the face.

When the mask is attached to the face, the worker breathes (exhalation A, intake B). At the time of exhalation, the exhaled air A becomes the exhaust flow a passing through the exhaust ventilation portion 23 from the space D in the mask portion and is discharged to the outside air. 1 will protect the eyes.

In particular, the present invention has an anti-fog function on the lens surface 11 of the goggles portion 1, and the anti-fog is the pressure change of the space D in the mask portion 2 during respiration, that is, the filter 222 of the intake ventilation portion 22 is outside air during inspiration. Due to the introduction resistance, the pressure in the space D inside the mask decreases, and the pressure in the space D inside the mask increases during exhalation. It realizes cloudiness.

More specifically, at the time of exhalation (FIG. 3A), when the exhaled breath A containing moisture that causes fogging of the lens surface 11 is discharged into the mask portion internal space D, the pressure in the mask portion internal space D increases, and the intake air is ventilated. The intake check valve 223 of the part 22 and the valve body 24b of the antifogging ventilation part 24 are closed, the invasion of the exhaled breath A into the space E inside the goggles part is prevented, and the discharge valve 232 of the discharge ventilation part 23 is increased by the pressure inside the mask part. It opens and becomes a discharge flow a from the discharge ventilation hole 231 and is quickly discharged from the space D in the mask portion.

At the time of intake (FIG. 3b), the pressure in the space D inside the mask portion decreases. As the pressure in the space D inside the mask decreases, the valve body 24b of the antifogging ventilation portion 24 is attracted to the mask portion space D side as a suction flow e, and the air in the space E inside the goggles portion passes through the antifogging ventilation portion 24 into the mask portion. It flows out to space D. When the pressure in the space E inside the goggles portion decreases due to the outflow of the suction flow e, the outside air f enters the space E inside the goggles portion from the outside air introduction portion 15 through the filter.

Further, at the end of the intake operation (FIG. 3C), the ventilation point of the outside air introduction portion 15 is a small through hole and the filter is interposed, so that the space E in the goggles portion immediately matches the pressure state of the atmospheric pressure. The space E inside the goggles is in a low pressure state, and at the moment until the valve body 24b of the antifogging ventilation part 24 is closed, the air in the space D inside the mask part (outside air flowing into the mask part) is the space inside the goggles part. It becomes a backflow d and flows in.

Therefore, with each breath, a part of the air in the space E inside the goggles is replaced with the outside air (backflow d) sucked into the space D inside the mask by the outside air f from the outside air introduction part 15 and the intake air, and the air inside the goggles part. By repeating the partial replacement of the lens surface, fogging of the lens surface can be prevented.

1 Goggles 11 Lens surface 12 Lens frame 13 Elastic edge 14 Belt connection 15 Outside air introduction 2 Mask 21 Cover frame 211 Triangular top 22 Intake ventilation section 221 Intake ventilation section 222 Through cylinder section 222 Filter 223 Intake check valve 23 Exhaust ventilation Part 231 Outlet vent hole 232 Outlet valve (check valve)
24 Anti-fog ventilation part 24a Ventilation hole 24b Valve body 241 Ventilation hole 242 Rubber band 243 Valve seat surface 244 Outer peripheral protrusion 24b Valve body 245 Valve shaft 25 Belt mounting part 3 Head mounting part 4 Mask part urging mechanism part ( rubber band)

Claims (3)

The face contact part of the lens frame part with the lens surface on the front is used as the elastic edge part, and the goggles part that covers the upper part of the face and is worn in a closed state, and the nose and mouth part are covered in a closed state. A mask portion provided with an intake ventilation portion provided with a filter and an exhalation discharge portion provided with a check valve for discharging and closing the exhaled air, and a space for mounting the mask portion and mounting the goggles portion. It is a work face mask with a head mounting part that is connected and integrated so that the time and space are partitioned by a predetermined partition part, and the goggles part and the mask part are maintained in a sealed state and can be worn on the face. ,
The anti-fog ventilation part equipped with a valve body that closes the partition part by increasing the pressure inside the mask part due to exhalation to prevent the exhaled air from entering the goggles part and opens in response to the decrease in pressure inside the mask part due to inspiration, and the goggles part. A work face mask characterized in that a small through hole is formed and an outside air introduction portion sealed with a filter is provided at an appropriate position in the lens frame portion of the above. The anti-fog ventilation part is provided in the ventilation hole part where the crosspiece is passed to the ventilation hole provided in the partition part, and the valve seat surface and the outer peripheral protrusion portion are formed on the outer edge of the ventilation port. A valve body formed of a thin resin film in a concentric stepped shape is arranged in the outer peripheral protruding edge portion, and the central portion of the valve body is connected to the central portion of the ventilation hole by appropriate means to form the outermost outer peripheral portion of the valve body. The working face mask according to claim 1, wherein the air is brought into contact with the valve seat surface to close the ventilation holes. A claim that the intake air vent portion projects a cylindrical through-cylinder portion in front of the mask portion, a filter is internally provided in the through-cylinder portion, and an intake check valve is provided between the intake and ventilation portion and the space inside the mask portion. The working face mask according to 1 or 2.

Images