JPH0234920Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a facepiece in a dust mask, a gas mask, etc.

The facepiece of dust masks, gas masks, etc. is generally made of flexible rubber, etc., but since the shape of the human face varies greatly, it is difficult to make it perfectly fit the face of each user. However, even though high-performance devices and absorbents are attached to the facepiece, outside air can enter the inside of the facepiece through the space between the periphery of the facepiece and the wearer's face. In many cases, a part of the clean gas sucked into the face orifice leaks, impairing its performance.

If the facepiece is strongly pressed against the wearer's face with a lace, it is possible to prevent the intrusion and leakage of outside air and the leakage of clean gas, but this results in giving the wearer a feeling of pressure and pain.

The present invention seeks to provide a facepiece, such as a dust mask, that is manufactured to perfectly fit the face of each user.

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a facepiece for a dust mask, gas mask, etc., which is molded from flexible rubber. 2 is a tubular space provided inside the periphery of the facepiece 1; 3 is a tubular space 2 provided at an appropriate location on the periphery of the facepiece 1;
The injection port 4 is a resin that is injected into the tubular space 2 and hardened, and when the facepiece 1 is attached to the face of the wearer 5, it is filled with, for example, urethane foam, silicone resin, etc. The tip of a syringe 6 filled with a room-temperature curing resin such as the above resin is inserted into the injection port 3, and the resin is injected into the entire tubular space 2 and cured. Reference numeral 7 denotes an exhaust valve port provided on the facepiece 1, and 8 denotes a tightening string attached to the periphery of the facepiece 1.

As described above, the present invention provides a tubular space around the periphery of the facepiece, and when the facepiece is attached to the wearer's face, a room-temperature curing resin or the like is injected into the tubular space and cured. Because of this, the periphery of the facial body can be molded into a shape that perfectly matches the uneven shape of the individual user's face, improving the adhesion between the facial body and the wearer's face, and improving the shape of the facial body. It can prevent the intrusion and leakage of outside air and the leakage of a part of the clean gas sucked into the facial body, and even if high-performance equipment and absorbents are installed, their performance will not be impaired. Furthermore, since the peripheral edge of the facepiece can be brought into close contact with the wearer's face without putting pressure on it, it has the advantage that it does not make it uncomfortable to wear.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a facepiece such as a dust mask according to the present invention, Figure 2 is a diagram showing an example of injecting resin into the tubular space of the facepiece, and Figure 3 is a diagram showing how the same facepiece is attached. FIG. 3 is a cross-sectional view of the device being worn on a person's face. 1... Facial body, 2... Tubular space, 4... Resin, 5... Wearer.

Claims (1)

[Scope of utility model registration request] A facepiece, such as a dust mask, which is formed by providing a tubular space in the periphery of the facepiece, and injecting resin into the tubular space and hardening the resin while the facepiece is attached to the wearer's face.