JP2000107304A - Loose-fitting type air-sending mask - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fit or remove the helmet and the eyepiece of a loose-fitting type air-sending mask in a single operation. SOLUTION: In a loose-fitting type air-sending mask consisting of a helmet and an eyepiece, a fitting-part fitting hole is bored in the lower periphery of the helmet, and a face-seal is provided to the circumferential peripheral part of the eyepiece, and also a fitting member is projectedly provided to the upper part of the eyepiece to fit the fitting member to the fitting hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loose fitting type air supply mask, and more particularly, to a loose fitting type air supply mask in which a helmet and an eyepiece can be attached and detached with one touch.

[0002]

2. Description of the Related Art A loose fitting type air respirator is composed of a helmet for protecting a wearer's head and an eyepiece for covering a wearer's face and shielding the outside from contamination and ensuring a view. A face seal is provided on the periphery of the eyepiece to maintain an airtight state.
In the loose fitting type air supply mask, the helmet and the ice piece are integrated, and a ring is attached to the eyepiece. Air is supplied into the space between the face and the eyepiece to prevent harmful substances from entering the space inside the mask.

FIG. 5 shows the structure of the loose fitting type air supply mask. In FIG. 5, a loose fitting type air supply mask 1 is made of a cap body (helmet) 2 for protecting the head, and a transparent plastic in front of the face to isolate the face from the outside air and secure a visual field. Eyepiece 4. A face seal 5 for sealing a gap between the face and the eyepiece is provided at a peripheral portion of the eyepiece 4. The air supply pipe is connected to a ring 6 provided on a part of the eyepiece. The helmet 2 and the eyepiece 4 are rotatably and integrally attached by mounting screws 8 provided on both sides of the helmet 2.

In such a mask, when used, the eyepiece 4 is lowered in front of the face, the gap between the face and the eyepiece is sealed with a face seal 5, and clean air is passed through a ring 6 from an air supply pipe to the inside of the mask.
That is, the space between the wearer's face and the eyepiece is supplied and filled to prevent the inflow of contaminated air from the outside air, and the eyepiece 4 is lifted up around the mounting screw 8 when not in use. .

[0005]

Once such a loose fitting type air supply mask 1 is worn, it must be always worn with a helmet even when not in use, and the eyepiece must be worn while wearing the helmet. When rotated and lifted upward, the helmet and eyepiece are easily fixed in place by the mounting screws, so the eyepiece often falls easily in front of the face. Tightening the screw makes it difficult to lift the eyepiece, and in each case, it is very troublesome in many cases. Therefore, in order to avoid such annoyance, the helmet and the eyepiece were separately provided, or as a result of various investigations to prevent the eyepiece from easily falling in front of the face even when the eyepiece was lifted, the present invention was carried out. The purpose of the present invention is to make the helmet and the eyepiece detachable,
Another object of the present invention is to provide a loose fitting type air supply mask capable of reliably lifting the eyepiece upward.

The gist of the invention of claim 1 of the present application is a loose fitting type air supply mask comprising a helmet and an eyepiece, wherein a hole for fitting a fitting portion is formed in a lower edge portion of the helmet and a peripheral edge of the eyepiece. 4. A loose-fitting type air supply mask according to claim 3, wherein a face seal is provided at a portion, and a fitting is projected from an upper part of the eyepiece, and the fitting is fitted into the fitting hole. The gist of the present invention is a loose fitting type air supply mask including a helmet and an eyepiece, in which a fixing device is provided on a lower edge of the helmet, a band holding member is attached to the eyepiece, and the fixing device and the band holding member are stretchable. This is a loose fitting type air supply mask characterized by being tightened by a band.

In the present invention, the helmet and the eyepiece are separated from each other by unifying the helmet and the fitting provided on the upper part of the eyepiece into the fitting hole of the helmet, and releasing the fitting when not in use. The mounting and dismounting operations can be performed with a single touch, which is convenient. Also, in the present invention, a headband is provided on the upper peripheral portion of the eyepiece so that only the eyepiece can be worn, and in particular, it can be kept airtight even without a helmet, so that it can be used without a helmet. I can do it. Furthermore, when the helmet and the eyepiece are tightened with an elastic band, the eyepiece can be reliably and easily lifted upward by the elasticity of the band.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The helmet and the eyepiece of the present invention are not different from the helmet and the eyepiece of the conventionally used loose-fitting type air supply mask, except for a fitting for fitting the two together. In the present invention, a fitting hole is formed in the lower edge of the helmet as the mounting tool, and the size of the fitting is about 3 to 5 cm, and is provided on both sides. As an attachment provided on the eyepiece that fits into the eyepiece, an attachment support is provided at the upper end of the eyepiece, and the attachment is protruded from the attachment support. There is no particular limitation on the mounting tool, but it is preferable to provide a cut in the protruding piece and fit it with the elasticity of the protruding piece itself. In addition, it is preferable that a position where air is fed into the inside of the mask from the air inlet tube as necessary, that is, a straightening plate is provided inside the ring to prevent the incoming air from directly hitting the eyes of the wearer. . When tightening the helmet and the eyepiece with an elastic band, the fixing device is attached to the side of the helmet, and the eyepiece is fixed by the band. A projection may be provided on the upper part of the eyepiece so as to cover the eaves of the helmet, thereby improving a sense of stability when worn. It is preferable that the band to be used has a width similar to that of a commonly used lace and is made of rubber or metal having a spring mechanism. The use of the band can cover individual differences in facial shape. Since the band has elasticity, it can be moved to the upper surface of the helmet when no eyepiece is required. Also, the band can be easily removed from the fixture.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The loose fitting type air supply mask according to the invention of claim 1 is referred to as a helmet mounting type 1 and the loose fitting type air supply mask according to the invention of claim 2 is referred to as a helmet mounting type 2. 1 and 2 are drawings of a helmet mounting type 1 and FIG.
(A) is a front view, (b) is a side view, and FIG. 2 is a side view when worn. 3A and 3B are side views of the helmet type 2, in which FIG. 3A shows a state in which the eyepiece is lowered, and FIG. 3B shows a state in which the eyepiece is raised. FIG. 4 is a side view when only the eyepiece is worn, and FIG. 5 is a side view of a conventional product. In FIG. 1, a fitting hole 3 is provided at the lower edge of the helmet 2. Eyepiece 4
Is provided with a face seal 5 on the peripheral edge and a ring 6 on a part thereof. An air supply pipe 7 is connected to the ring 6 (see FIG. 2). Further, mounting support portions 9 are provided at upper end portions on both sides of the eyepiece 4, and mounting projections 10 are provided on the mounting support portion 9. In FIG. 1B, reference numeral 13 denotes a chin strap to be tightened after the helmet is mounted. In such a mask, a loose fitting type air supply mask can be configured by simply inserting the mounting projection 10 into the fitting hole 3 provided on the lower edge of the helmet 2 in use.

FIG. 3 shows a helmet type 2 and
3A is a side view when the eyepiece 4 is lowered, and FIG. 3B is a side view when the eyepiece is raised. Fixing portions 15 are provided on both side surfaces of the helmet 2, and one end of an elastic band 16 attached to the eyepiece 4 is attached to the fixing portion 15. Therefore, the eyepiece 4 is tightened and fixed by the band 16. In addition, if necessary,
By providing a projection 17 on the upper part of the eyepiece and locking it to the eaves of the helmet, the fixation of the eyepiece 4 can be further ensured. Further, since the eyepiece 4 can be moved upward with the fixing device as a center, the eyepiece 4 can be moved upward.
When the tool 4 is not required, it can be lifted as shown in FIG. The band 16 is made of an elastic rubber band or a metal having a spring mechanism.
The use of the band 16 makes it possible to cover individual differences in the facial shape. The eyepiece 4 has a headband 1
1, and when the headband 11 is used, the eyepiece 4 can be worn alone as shown in FIG. Also, as shown in FIG. 1A, the rectifying plate 1 is located at a position where air is sent from the ring 6 into the mask.
2 can be provided to control the flow of air in the eyepiece, prevent the wearer's eyes from drying out, and prevent inflow of contaminated air from outside air.

[0011]

The mask of the present invention is integrated by fitting and attaching an eyepiece mounting member to a fitting hole provided in the helmet, so that attachment and removal of the eyepiece from the helmet can be performed with one touch. Since a face seal is provided on the peripheral portion of the eyepiece to maintain an airtight state, it can be used without a helmet by using a headband.

[Brief description of the drawings]

FIG. 1 is an embodiment (a helmet mounting type 1) of a loose fitting type air supply mask according to the present invention, wherein (a) is a front view and (b) is a side view.

FIG. 2 is a side view when the helmet mounting type 1 according to the present invention is worn.

3A and 3B show another embodiment of the loose-fitting type air supply mask according to the present invention, wherein FIG. 3A is a front view and FIG. 3B is a side view.

FIG. 4 is a side view when the eyepiece of the loose fitting type air supply mask according to the present invention is worn alone.

FIG. 5 is a side view of a conventional loose fitting type air supply mask.

[Explanation of symbols]

2 Helmet 3 Fitting hole 4 Eyepiece 5 Face seal 6 Ring 7 Air supply pipe 8 Mounting screw 9 Projection support member 10
Projection piece 11 Headband 12 Rectifier plate 13 Chisel 15 Fixture 16 Band 17 Projection

Claims (3)

[Claims] 1. A loose fitting type air supply mask comprising a helmet and an eyepiece, wherein a hole for fitting a fitting portion is formed in a lower edge of the helmet, a face seal is provided on a peripheral edge of the eyepiece, and an eyepiece is provided. A loose fitting type air supply mask, wherein a fitting is projected from an upper portion and the fitting is fitted into the fitting hole. 2. The loose-fitting air supply mask according to claim 1, wherein a head band is provided on an upper part of the eyepiece. 3. A loose fitting type air supply mask comprising a helmet and an eyepiece, wherein a fixing tool is provided on a lower edge of the helmet, a band holding member is attached to the eyepiece, and the fixing tool and the band holding member are connected to each other. A loose fitting type air supply mask characterized by tightening with an elastic band.