JPS61156943U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1a shows a longitudinal sectional view of an embodiment of the mask of the present invention. FIG. 1b: A sketch showing a state in which the filter and presser plate of the mask are removed in the embodiment of the mask of the present invention. Figures 1c and d... 1st
In the embodiment shown in Figures a and b, a top view and a longitudinal sectional view showing the state in which the fastener is inserted into and removed from the holes in the dustproof filter and the holding plate, and the fastener presses the dustproof filter (the dotted line fasteners indicate the insertion and removal of the fasteners). (The solid-line fastener indicates the situation in which the fastener presses the dust-proof filter.The solid-line arrow in Fig. 1d indicates the direction in which the filter presses, and the white line arrow indicates the insertion/removal direction.) FIG. 2a... A vertical sectional view of another embodiment of the mask of the present invention. Figure 2b: A top view showing the situation in which the fastener inserts and removes the dust-proof filter and the hole in the holding plate and presses the dust-proof filter in the embodiment shown in Figure 2a. ). Figure 2c...
...A lateral cross-sectional view showing a state in which the fastener presses the dustproof filter in the embodiment shown in FIG. 2a (the solid arrow indicates the direction in which the fastener presses). Fig. 2d: A lateral cross-sectional view showing a state in which the fastener is inserted into and removed from the holes in the dust filter and the holding plate in the embodiment shown in Fig. 2a (white arrows indicate the direction in which the fastener is inserted and removed).
FIG. 3 is a bottom view showing the dust mask of the present invention folded in two. Figures 4a, b, and c: partial sketches showing the fastener of the present invention when it is folded in two and the fixed fasteners of each shape are separated and interlocked. 1: Outer frame, 11: Fastener, 11a: Fastener head claw, 1b: Fixing hole, 1c: Fixed fastener, 2: Cushioning material, 3: Band, 4: Holding plate, 4a: Holding plate hole, 4b: Holding plate knob, 5
: Dustproof filter, 5a: Dustproof filter hole.

Claims (1)

[Claims for Utility Model Registration] (1) An outer frame, a cushioning material made of a flexible material that is fixed to the outer frame and has an end pressed against the face, and can be freely attached to and detached from the outer frame with the cushioning material interposed therebetween. This dust mask comprises a dust filter, a presser plate for the dust filter, a fastener capable of pressing the dust filter via the presser plate, and a band for fixing to the head of the mask. (2) To make the dustproof filter and holding plate detachable from the outer frame, several holes are provided in the dustproof filter and holding plate, and a fastener that protrudes from the outer frame and has a supporting claw on the head is attached to these holes. A utility model characterized in that the fastener is inserted into and removed from a hole, and the fastener is extended depending on the position of the claw in contact with the hole, and the resulting restoring force presses the dust filter through the holding plate to maintain airtightness. Dust mask described in registered claim (1). (3) The dust-proof filter and the holding plate are configured to be detachable from the outer frame, with multiple holes provided in the dust-proof filter and the holding plate so that the dust-proof filter and the holding plate protrude from the outer frame, and are bent toward the outer periphery of the outer frame, and are bent in the same direction. A bendable elastic fastener having a deformation stress of , the dust mask according to claim (1) of the utility model registration, which is characterized by maintaining airtightness.