JP4041848B2 - mask - Google Patents

Description

  The present invention relates to a mask that allows an air supply component such as a filter unit to be easily attached to and detached from a face body.

Conventionally, a mask composed of a face piece and a filter unit that can be attached to and detached from the face piece is well known. For example, Japanese Patent No. 3012823 (Patent Document 1) discloses this type of mask. In this mask, a predetermined portion of the filter unit is fitted to a predetermined portion of the face piece, and the face piece and the filter unit are integrally held by the action of a spring biased stopper. Further, in Patent Document 1, as a conventional technique, a mask that can integrate both of a screw part provided in a predetermined part of a face piece and a screw part provided in a predetermined part of a filter unit can be integrated. It is shown.
Japanese Patent No. 3012823

  The mask disclosed in Patent Document 1 is not suitable for applications in which the filter needs to be replaced quickly because the filter needs to be aligned between the filter and the mask when the filter unit is attached to the mask. Moreover, the filter unit of the mask shown as patent document 1 as a prior art must be rotated with respect to a face body, when replacing | exchanging it. Therefore, when trying to replace the filter unit while wearing the mask, the mask wearer must try to prevent the head from wobbling so that the filter unit can be easily rotated.

  The object of the present invention is to make it unnecessary to align the face piece and the air supply component when attaching and detaching the air supply component such as the filter unit to the face piece, and while wearing the mask. An object of the present invention is to improve the conventional mask so that the filter unit can be easily replaced.

Means for Solving the Problems and Effects of the Invention

  In order to solve the above problems, the present invention is made up of a face piece and an air supply component that can be attached to and detached from the face piece, and the face piece has a first cylindrical portion that communicates with the inside and outside of the face piece. On the other hand, the air supply component is formed with a second cylindrical part that is insertable / removable with respect to the inside of the first cylindrical part and has air permeability, and the first cylindrical part and the second cylindrical part are formed. The cylindrical portion is a mask in which stopper means for temporarily preventing the second cylindrical portion from being pulled out is formed.

In such a mask, the present invention is characterized as follows. Wherein the first cylindrical portion, a circular arc shape that is substantially round the inner circumferential surface and extending in the circumferential direction of the inner peripheral surface in a state of protruding from the inner peripheral surface of the first cylindrical portion radially inward A fixed end portion formed at one end portion of the arc-shaped portion in the circumferential direction and fixed to the first cylindrical portion, and formed at an end portion opposite to the one end portion, and the first cylinder. The stopper means having an operation end located outside the outer peripheral surface of the shaped portion is formed. When the stopper means is operated so that the operation end moves along the outer peripheral surface in the circumferential direction, the arc-shaped portion increases the inner diameter of the arc-shaped portion with the fixed end serving as a fulcrum. It is formed to be elastically deformable. The second cylindrical portion has a first portion with a large outer diameter located near the front in the insertion direction to the first cylindrical portion, and a small outer diameter with the second portion located behind the first portion. A second part is formed. The arc-shaped portion in the first cylindrical portion is formed to have an inner diameter smaller than the outer diameter of the first portion in the second cylindrical portion and substantially the same as the outer diameter of the second portion, And when the said circular-arc-shaped part elastically deforms, it forms so that it may become larger than the outer diameter of the said 1st site | part. When the second cylindrical portion is inserted into the first cylindrical portion, the first portion of the second cylindrical portion passes through the arc-shaped portion under the elastic deformation of the arc-shaped portion in the stopper means. Then, after passing through the first part, the arc-shaped part is elastically restored and fits in the second part of the second cylindrical part, and contacts the first part from the rear in the insertion direction. Thus, the second cylindrical portion is formed so as to be able to temporarily prevent the second cylindrical portion from being removed from the first cylindrical portion.

  In the mask having such a configuration, when the operating portion located outside the outer peripheral surface of the first cylindrical portion is moved in the circumferential direction of the outer peripheral surface, the arc-shaped portion forming the stopper means has a larger inner diameter. Thus, the second cylindrical portion can be easily inserted into and removed from the first cylindrical portion.

  In one embodiment of the present invention, the first cylindrical portion has an annular shape that can be in close contact with the tip end portion of the second cylindrical portion that is inserted forward of the arc-shaped portion in the insertion direction. Elastic packing is provided.

  In the mask having such a configuration, the tip of the second cylindrical portion inserted into the first cylindrical portion and the packing are in close contact with each other, and the air tightness between the first cylindrical portion and the second cylindrical portion is achieved. Connection in a state becomes possible.

  In another embodiment of the present invention, the air supply component includes a filter unit that includes a filter and is replaceably attached to the face body, and one end portion is formed to be connectable to an air supply source, and an opposite end portion thereof. Is one of the air pipes that are detachably attached to the face body.

  The mask having such a configuration can be used as a dust mask if the air supply component is a filter unit, and can be used as an air supply mask if the air supply component is an air supply pipe.

  In another embodiment of the present invention, the arc-shaped portion is a plane in which a cross-sectional shape in the axial direction of the first cylindrical portion is perpendicular to the axis in front of the insertion direction, and A tilted plane that intersects the axis at an acute angle at the rear, wherein the second cylindrical part shares the axis with the first cylindrical part, and the first part of the second cylindrical part is The cross-sectional shape in the axial direction of the second cylindrical portion is an inclined plane that intersects the axis at an acute angle in front of the insertion direction, and is a plane orthogonal to the axis in the rear in the insertion direction.

  In the mask having such a configuration, when the second cylindrical portion is inserted into the first cylindrical portion, the inclined plane of the first portion in the second cylindrical portion is the inclination of the stopper means in the first cylindrical portion. The flat surface is pressed to elastically deform the arcuate portion of the stopper means so that the inner diameter becomes larger. Therefore, the air supply unit can be attached to the face piece simply by inserting the second cylindrical portion into the first cylindrical portion.

  The details of the mask according to the present invention will be described with reference to the accompanying drawings.

  A mask 1 shown in a front view in FIG. 1 is for dust prevention, and has a face piece 2 and a filter unit 3.

  The mask 1 has a front side and a rear side, the front side is a side far from the face of the mask wearer, and the back side is a side close to the face. The face body 2 located closer to the rear of the mask 1 has a face mouth member 6 made of a flexible and elastic sheet-like material and an elastically expandable / shrinkable head passed through the band insertion hole 7 of the face mouth member 6. A band 8, an attachment 9 (see FIG. 2) that is detachable from the filter unit 3 and is integral with the face opening member 6, and an exhaust part 11 that is also integral with the face opening member 6. The filter unit 3 located closer to the front of the mask 1 has a plurality of through holes 12 communicating with the inside of the face opening member 6 so as to allow ventilation. Such a mask 1 is worn by placing the face opening member 6 on the face and hanging the headband 8 around the head. Inhalation of the mask wearer passes through the through-hole 12 and enters the inside of the face opening member 6, and exhaled air passes through the exhaust part 11 and flows out of the face opening member 6.

  2 and 3 are a sectional view taken along line II-II in FIG. 1 and a partially enlarged view of FIG. The attachment 9 of the face body 2 is formed in a cylindrical shape, and has an inner annular member 21 located closer to the inside of the face opening member 6 and an outer annular member 22 located closer to the outside of the face opening member 6. The inner annular member 21 has an inner end 24 attached to the peripheral edge of the vent hole 23 of the face opening member 6 and an outer end 26 extending toward the outer annular member 22. An intake valve 25 provided on the inner annular member 21 and attached to the support portion 19 is in contact with the inner end portion 24 so as to be opened and closed. In the outer annular member 22, the inner end portion 27 is fitted to the outer end portion 26 of the inner annular member 21 from the outside, and the front end portion 28 extends forward of the face opening member 6. An annular packing 29 that is flexible and elastic is filled between the inner annular member 21 and the outer annular member 22. The outer annular member 22 has an annular groove 30 inside the outer end portion 28, and an annular stopper 32 is accommodated in the groove 30. The engaging portion 35 of the stopper 32 protrudes from the groove portion 30 toward the horizontal central axis CC of the outer annular member 22. The central axis C-C is also the central axis of the inner annular member 21, the vent hole 23, and the filter unit 3 in addition to the outer annular member 22.

  The filter unit 3 attached to the attachment 9 includes an inner case 3a, an outer case 3b, and a sheet-like filter 45 sandwiched between the two cases 3a and 3b. The inner case 3a has a cylindrical rear portion 33 that is detachably fitted to the attachment 9, and a front portion 34 having a larger inner diameter than the rear portion 33, and the outer case 3b is detached from the front portion 34 of the inner case 3a. It has a rear part 36 that cannot be fitted, and a front part 37 having a ventilation hole 12 for ventilation (see FIG. 1). The rear part 33 of the rear portion 33 of the inner case 3a is in close contact with the packing 29 from the left side of the drawing, and the space between the filter unit 3 and the face piece 2 is kept airtight. The rear portion 33 also has an engaging raised portion 39 that goes around the outer peripheral surface, and outer peripheral surfaces 40 a and 40 b that have an outer diameter smaller than the outer diameter of the raised portion 39 and are positioned before and after the raised portion 39. . The raised portion 39 has a front surface 41 composed of a vertical surface orthogonal to the central axis CC, and a rear surface 42 composed of an inclined surface intersecting the central axis CC at an acute angle. The filter unit 3 is attached so as not to be detached from the face piece 2 by closely contacting the engaging portion 35 from the right side of the figure.

  The exhaust part 11 includes an inner case 51 fixed to the face opening member 6, and an outer case 53 having a plurality of exhaust ports 52 and attached to the inner case 51. An exhaust through hole 54 is formed in the inner case 51, and an exhaust valve 56 is attached to the through hole 54.

FIG. 4 is a front view of the face piece 2 from which the filter unit 3 is removed. In the attachment 9, an intake valve 25 attached to the support portion 19 of the inner annular member 21 covers the vent hole 23 of the face port member 6 so that it can be opened and closed. The stopper 32 that fits in the groove portion 30 of the outer annular member 22 is an annular member that is formed so as to make one round of the outer annular member 22 along the inner peripheral surface 61 (see FIGS. 2 and 3) of the groove portion 30. A base end portion 62 fixed to the surface 61; an operation end portion 64 opposite to the base end portion 62 and located outside the outer peripheral surface 63 of the outer annular member 22; a base end portion 62 and an operation end; An arcuate portion 65 is provided between the portion 64 and extending along the inner peripheral surface 61. The arc-shaped portion 65 has an inner peripheral edge portion 66 and an outer peripheral edge portion 67, and most of the inner peripheral edge portion 66 except the vicinity of the base end portion 62 protrudes from the groove portion 30 and protrudes into the vent hole 23. The engagement part 35 in FIG. 2 is formed. The outer peripheral edge 67 is inside the groove 30, but is separated from the inner peripheral surface 61 of the groove 30. The operation end portion 64 can slide in the arrow A direction along the outer peripheral surface 63 of the groove portion 30. The stopper 32 is made of a general-purpose plastic or engineering plastic that can be elastically deformed, such as ABS resin or nylon resin, and the outer annular member 22 is moved in the direction of arrow A by grasping the operation end 64 with a fingertip. , The arcuate portion 65 is elastically deformed with the base end portion 62 as a fulcrum so as to increase its inner diameter, and is formed by the inner peripheral edge portion 66 and extends into the vent hole 23. The part 35 retreats to the inside of the groove part 30. When the fingertip is released from the slid operation end portion 64, the operation end portion 64 and the arcuate portion 65 are elastically returned to the state shown in FIG. 2 also includes a cross section taken along the line II-II in FIG. 4, and as is obvious from FIG. 4, the base end portion 62 of the stopper 32 in FIG. However, the inner peripheral edge portion 66 of the portion facing the base end portion 62 in the radial direction of the inner annular member 21 protrudes from the groove portion 30 and protrudes to the vent hole 23. In the vent hole 23, the inner peripheral edge 29 a of the packing 29 is seen inside the inner peripheral edge 66 of the stopper 32.

  5 and 6 are a plan view of the stopper 32 and a sectional view taken along line VI-VI in the plan view. The shape of the base end portion 62 of the stopper 32 is designed so that the base end portion 62 can be fixed to the inner peripheral surface 61 by fitting into a predetermined portion provided on the inner peripheral surface 61 of the outer annular member 22. It has been. The inner diameter of the arc-shaped portion 65 is smaller than the outer diameter of the inner case 3a in the portion including the raised portion 39 as compared with the outer diameter of the inner case 3a in the filter unit 3, and is the inner side of the portion including the outer peripheral surfaces 40a and 40b. The outer diameter of the case 3a is almost the same. When the operation end 64 is slid in the direction of arrow A, the stopper 32 to which the base end 62 is fixed is elastically deformed to a position indicated by the phantom line 65a. The inner diameter of the portion 65 is larger than the outer diameter of any portion in the rear portion 33 of the inner case 3a. The inner peripheral edge 66 of the arc-shaped portion 65 has a cross-sectional shape along the central axis CC, and a front surface 71 formed of a slope intersecting with the central line CC at an acute angle, and a perpendicular perpendicular to the central line CC. And a rear surface 72 made of a surface. In the filter unit 3 attached to the attachment 9 in FIG. 2, the front surface 41 of the engaging raised portion 39 in the inner case 3 a is in contact with the rear surface 72 of the stopper 32 from the right side in FIG. 2. However, when the filter unit 3 is attached to the attachment 9, when the rear portion 33 of the inner case 3 a is inserted into the attachment 9, the inclined rear surface 42 of the raised portion 39 presses the inclined front surface 71 of the stopper 32 to stop the stopper 32. 5 can be elastically deformed to the position of the phantom line 65a shown in FIG. 5, and when the raised portion 39 passes through the stopper 32, the stopper 32 is elastically restored and the filter unit 3 is restored. The filter unit 3 and the stopper 32 are in the state shown in FIG.

  Since the stopper 32 acts in this way, when attaching the filter unit 3 to the attachment 9, it is not always necessary to slide the operation end 64 in the direction of the arrow A with the fingertip, but when removing the filter unit 3. It is always necessary to slide the operation end 32 in the direction of arrow A. However, since the operation end portion 64 of the stopper 32 is near the mouth of the mask wearer, it is very easy for the wearer himself to slide the operation end portion 64 and remove the filter unit 3. Further, the arc-shaped portion 65 of the stopper 32 can be easily elastically deformed so that the inner diameter is increased only by lightly contacting the inclined rear surface 42 of the filter unit 3 with the inclined front surface 71. However, even with such a stopper 32, the filter unit 3 after being attached to the attachment 9 does not have an action of deforming the arc-shaped portion 65 so that the inner diameter becomes larger. Unless it is moved, it will not come off the attachment 9. The stopper 32 in which the arc-shaped portion 65 is easily elastically deformed also has an advantage that the operation end portion 64 can be easily slid by the mask wearer. The contact between the front surface 41 of the raised portion 39 in the filter unit 3 and the rear surface 72 in the stopper 32 is made dense by bringing the rear end 38 of the inner case 3 a and the packing 29 in the filter unit 3 into contact with each other under the elastic deformation of the packing 29. Become. Since the raised portion 39 of the filter unit 3 and the engaging portion 35 of the stopper 32 are both annular, when the filter unit 3 is attached to the attachment 9, there is no need to align the two.

  FIG. 7 is a view similar to FIG. 2 showing an example of the embodiment of the present invention. This mask 1 has a face body 2 having the same structure as the mask 1 of FIG. 2, but an air supply pipe 80 is attached to the attachment 9 of the face body 2 as an air supply component instead of the filter unit 3 of FIG. The air supply pipe 80 has a member 81 at one end thereof, and the member 81 has the same structure as the inner case 3a of the filter unit 3 of FIG. 2 and can be attached to and detached from the attachment 9 via the stopper 32. . The air supply pipe 80 can also be connected to the air supply source at the opposite end to the end having the member 81, but the illustration of the opposite end and the air supply source is omitted in FIG. ing.

  In the mask 1 of the present invention thus configured, the inner annular member 21 and the outer annular member 22 of the attachment 9, the stopper 32, the inner case 3 a and the outer case 3 b of the filter unit 3 are made of ABS resin, polypropylene resin, or the like. In addition to general-purpose plastics, engineering plastics such as polyacetal resins can be used. An elastomer such as natural rubber or silicon rubber can be used for the packing 29.

  According to this invention, it is possible to manufacture a mask in which an air supply component can be easily attached to and detached from a face piece.

The front view of a mask. II-II sectional view taken on the line of FIG. The elements on larger scale of FIG. FIG. The front view of a stopper. VI-VI sectional view taken on the line of FIG. The figure similar to FIG. 2 which shows an example of an embodiment.

Explanation of symbols

1 Mask 3 Air supply parts (filter unit)
6-sided body 9 1st cylindrical part 29 packing 32 stopper means 33 2nd cylindrical part 39 1st site | part (raised part)
40 a second portion (outer peripheral surface)
41 plane 42 plane 45 filter 62 fixed end portion 63 outer peripheral surface 64 operation end portion 65 arc-shaped portion 71 plane 72 plane 80 air supply component (air supply pipe)
CC axis

Claims (4)

The face body comprises a first cylindrical portion that communicates with the inside and outside of the face body, and the air supply part has the first cylindrical shape. A second cylindrical part that can be inserted into and removed from the inside of the part and has air permeability is formed, and the first cylindrical part and the second cylindrical part are provided in the second cylindrical part. In the mask in which the stopper means for temporarily blocking is formed,
Wherein the first cylindrical portion, a circular arc shape that is substantially round the inner circumferential surface and extending in the circumferential direction of the inner peripheral surface in a state of protruding from the inner peripheral surface of the first cylindrical portion radially inward A fixed end portion formed at one end portion of the arc-shaped portion in the circumferential direction and fixed to the first cylindrical portion, and formed at an end portion opposite to the one end portion, and the first cylinder. The stopper means having an operation end located outside the outer peripheral surface of the shaped part is formed, and the stopper means is operated so that the operation end moves along the outer peripheral surface in the circumferential direction. Then, the arcuate part is formed to be elastically deformable so as to increase the inner diameter of the arcuate part with the fixed end as a fulcrum,
The second cylindrical portion has a first portion with a large outer diameter located near the front in the insertion direction to the first cylindrical portion, and a small outer diameter with the second portion located behind the first portion. A second part is formed,
The arc-shaped portion of the stopper in the first cylindrical portion is formed to have an inner diameter smaller than the outer diameter of the first portion in the second cylindrical portion and substantially the same as the outer diameter of the second portion. And the arcuate portion is formed to be larger than the outer diameter of the first portion when elastically deforming,
When the second cylindrical portion is inserted into the first cylindrical portion, the first portion of the second cylindrical portion passes through the arc-shaped portion under the elastic deformation of the arc-shaped portion in the stopper means. Then, after passing through the first part, the arc-shaped part is elastically restored and fits in the second part of the second cylindrical part, and contacts the first part from the rear in the insertion direction. The mask is characterized in that the second cylindrical part is formed so as to be able to temporarily prevent the second cylindrical part from being removed from the first cylindrical part.   The said 1st cylindrical part is provided with the cyclic | annular elastic packing which can contact | adhere to the front-end | tip part of the said 2nd cylindrical part inserted ahead of the said circular arc-shaped part in the said insertion direction. The mask according to 1.   The air supply component includes a filter unit that includes a filter and is replaceably attached to the face body. The mask according to claim 1 or 2, wherein the mask is one of trachea.   The arcuate portion is inclined such that the cross-sectional shape in the axial direction of the first cylindrical portion is a plane perpendicular to the axis in front of the insertion direction, and intersects the axis at an acute angle in the rear of the insertion direction. The second cylindrical part shares the axis with the first cylindrical part, and the first part of the second cylindrical part is the axial direction of the second cylindrical part. 4. The mask according to claim 1, wherein the cross-sectional shape of the mask is an inclined plane that intersects the axis at an acute angle in front of the insertion direction, and is a plane that is orthogonal to the axis in the rear of the insertion direction.

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