JPH0319892Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an exhaust valve device that can adjust the exhaust resistance within a mask.

BACKGROUND ART A blower type mask has a mechanism that improves airtightness by forcibly blowing air into the mask to maintain positive pressure inside the mask at all times.

Problems that the invention aims to solve In order to improve the airtightness of a mask, it is sufficient to increase the pressure inside the mask.
In the case of airflow, the higher the ventilation resistance, that is, the higher the exhaust resistance, the higher the pressure inside the mask and the higher the airtightness. However, simply increasing the exhaust resistance to increase the internal pressure of the mask also poses a problem. There are individual differences in the ability of mask users to exhale, and even if it is easier to inhale, exhaling may be difficult.

Based on the above, the main idea is to increase the pressure inside the mask,
When the exhaust resistance is increased in order to improve the airtightness of the mask, the purpose is to enable the user to select an exhaust resistance suitable for the user.

Means for Solving the Problems In an exhaust valve device for a mask consisting of an exhaust valve, an exhaust valve seat, an exhaust valve cover, and an exhaust port frame, the exhaust valve seat and the exhaust port frame are provided with an exhaust valve support in the center. This exhaust valve device for a mask is characterized in that an exhaust valve cover having an integral structure is screwed together with a screw, and the degree of contact between the exhaust valve and the exhaust valve seat can be adjusted by moving the screw of the exhaust valve seat.

Effect Since the present proposal is configured as described above, if you want to increase the pressure inside the mask and improve the airtightness,
When the exhaust valve cover 6 is rotated in a direction in which it is removed from the screw 11, the exhaust valve 5 comes into pressure contact with the valve seat 8, so that the contact pressure between the exhaust valve and the valve seat increases, thereby improving airtightness.

Embodiments Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings. 2 is an exhaust port frame attached to the mask body 1, and 3 is a support for an exhaust valve 5 that is attached to the center of the exhaust port 4 of the exhaust port frame 2. , 6 is an exhaust valve cover having a ventilation window 7 on the peripheral wall, and an inner frame 9 whose upper end is formed at the valve seat 8 of the exhaust valve 5 is provided integrally with the cover 6, and the inner frame 9 is formed integrally with the cover 6. Female screw 10 provided on the inner surface of the frame
is a male screw 11 provided on the outer periphery of the cylindrical part of the exhaust port frame 2.
This allows the exhaust valve cover 6 to be moved. Reference numeral 12 denotes an O-ring fitted between the middle frame 9 and the outer periphery of the cylindrical part of the exhaust port frame.

Effect The main idea is as above, so depending on the work environment,
For example, types and concentrations of toxic dust and gas, etc.
When it becomes necessary to consider the safety required for the mask, that is, airtightness, according to factors harmful to the human body, the exhaust valve cover can be rotated by hand to easily adapt the internal pressure inside the mask to the requirements. There are flights that can be decided. For these reasons, it is possible to ensure the necessary safety in each work environment, and also to select an exhaust resistance that matches the physical strength of the mask wearer, so the user can wear it without feeling uncomfortable. There are benefits that can be achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view showing the main parts, and FIG. 2 is a side view. 1...Mask body, 2...Exhaust port frame, 3...Exhaust valve support, 4...Exhaust port, 5...Exhaust valve, 6
... Exhaust valve cover, 7 ... Ventilation window, 8 ... Exhaust valve seat, 9 ... Middle frame, 10 ... Female thread, 11 ... Male thread, 12 ... O-ring.

Claims (1)

[Scope of utility model registration request] In a mask exhaust valve device consisting of an exhaust valve 5, an exhaust valve seat 8, an exhaust valve cover 6, and an exhaust port frame 2,
Exhaust port frame 2 equipped with a support 3 for an exhaust valve 5 in the center
The exhaust valve cover 6, which has an integral structure with the exhaust valve seat 8, is screwed together with a screw, and the degree of contact between the exhaust valve 5 and the exhaust valve seat 8 can be adjusted by moving the exhaust valve seat 8 with the screw. Characteristic mask exhaust valve device.