JP2007000400A

JP2007000400A - Filter unit

Info

Publication number: JP2007000400A
Application number: JP2005184551A
Authority: JP
Inventors: Hiroshi Sato; 大士佐藤; Takehito Suzuki; 剛人鈴木
Original assignee: Koken Co Ltd
Current assignee: Koken Co Ltd
Priority date: 2005-06-24
Filing date: 2005-06-24
Publication date: 2007-01-11
Anticipated expiration: 2025-06-24
Also published as: JP4371271B2

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a harmful substance from scattering out of a used filter unit. <P>SOLUTION: The filter unit comprises aeration openings 19 and 23 in the front and the back, and a front shutter 12 and a back shutter 13 which are set in the front and the back of the filter unit 3 formed detachably to the surface material to open and shut their respective aeration openings 19 and 23. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、マスク着用者の口許や鼻腔を覆う面口部材に対して取り付け、取り外し可能なフィルタユニットに関する。 The present invention relates to a filter unit that can be attached to and detached from a face mouth member covering a mouth or a nasal cavity of a mask wearer.

従来、面口部材に対して着脱可能なフィルタユニットはよく知られている。例えば、特開２００２−１２６１１１号公報（特許文献１）に開示されたフィルタユニットは、背の低い円筒状のもので通気性の前端部と後端部とを有し、前端部には開閉装置が取り付けられており、後端部には面口部材に対する取り付け手段が設けられている。このフィルタユニットと面口部材とからなるマスクを着用し、フィルタユニットの開閉装置を閉じることによってマスクを密閉状態にすると、マスクが着用者の顔面に対して空気漏れがないようにフィットしているか否かをチェックすることができる。そのチェックによってマスクの着用状態が正常であると判断されたならば、開閉装置を開いてマスクを使用する。
特開２００２−１２６１１１号公報 Conventionally, filter units that can be attached to and detached from the face opening member are well known. For example, a filter unit disclosed in Japanese Patent Application Laid-Open No. 2002-126111 (Patent Document 1) has a short cylindrical shape and has a breathable front end and a rear end, and the front end has an opening / closing device. Is attached, and a means for attaching to the face opening member is provided at the rear end. Whether the mask fits so that there is no air leakage to the wearer's face when the mask comprising the filter unit and the face-opening member is worn and the mask is closed by closing the opening / closing device of the filter unit. You can check whether or not. If it is determined by the check that the wearing state of the mask is normal, the opening / closing device is opened and the mask is used.
JP 2002-126111 A

面口部材に取り付けたフィルタユニットが捕集する粉塵やガス、ウイルス、バクテリア等には、人体にとって有害物質とみなされるものがある。従来、そのような有害物質を含む使用後のフィルタユニットは、ポリエチレン製の袋等に入れて密封したうえ焼却場等へ運び、そこで処理するということが通例であった。開閉装置を有する前記フィルタユニットは、その装置を閉じることによって、フィルタユニット前端部からの有害物質の飛散を防止することができるが、後端部からの飛散を防止することができないから、この場合のフィルタユニットも袋に入れて密封することが不可欠であった。 Some dust, gas, viruses, bacteria, and the like collected by the filter unit attached to the face opening member are regarded as harmful substances for the human body. Conventionally, a used filter unit containing such a harmful substance is usually put in a polyethylene bag or the like, sealed, transported to an incinerator, etc., and processed there. In this case, the filter unit having an opening / closing device can prevent scattering of harmful substances from the front end portion of the filter unit by closing the device, but cannot prevent scattering from the rear end portion. It was indispensable to seal the filter unit in a bag.

そこでこの発明は、フィルタユニット前後両端部からの有害物質の飛散を簡単に防止することができるように、従来のフィルタユニットに改良を加えることを課題にしている。 In view of this, an object of the present invention is to improve the conventional filter unit so that harmful substances can be easily prevented from scattering from both front and rear ends of the filter unit.

前記課題解決のために、この発明が対象とするのは、前端部分と後端部分とを有する円筒状部の前記両端部分に通気孔が形成され、前記両端部分の間には濾材が充填されており、前記後端部分の側がマスク着用者の口許と鼻腔とを覆う面口部材に着脱されるフィルタユニットである。 In order to solve the above problems, the present invention is directed to the formation of vent holes in the both end portions of a cylindrical portion having a front end portion and a rear end portion, and a filter medium is filled between the both end portions. The rear end portion side is a filter unit that is attached to and detached from a face mouth member that covers the mouth and nasal cavity of the mask wearer.

かかるフィルタユニットにおいて、この発明が特徴とするところは、前記前端部分と後端部分とに対して、それぞれに形成された前記通気孔を開閉するための前部シャッターと後部シャッターとが設けられていることにある。 In such a filter unit, the present invention is characterized in that a front shutter and a rear shutter for opening and closing the vent hole formed in each of the front end portion and the rear end portion are provided. There is to be.

この発明の好ましい実施態様のひとつにおいて、前記フィルタユニットが前記円筒状部の軸を中心に回転させて前記面口部材に取り付けられるものであり、前記前部シャッターと前記後部シャッターとが、前記円筒状部とは別体のものであって前記円筒状部に対して前記軸を中心に回転可能に形成されており、かつ、前記円筒状部に対して前記フィルターユニットを前記面口部材に取り付けるときに回転させる方向と同じ方向へ回転させると前記前端部分と後端部分との前記通気孔を開くことができ、前記方向とは反対の方向へ回転させると前記通気孔のそれぞれを閉じることができる（請求項２に対応）。 In one of preferred embodiments of the present invention, the filter unit is attached to the face opening member by rotating about the axis of the cylindrical portion, and the front shutter and the rear shutter are the cylinder. And is formed separately from the cylindrical portion so as to be rotatable about the axis with respect to the cylindrical portion, and the filter unit is attached to the face opening member with respect to the cylindrical portion. When rotating in the same direction as sometimes rotating, the vent holes in the front end portion and the rear end portion can be opened, and when rotating in the direction opposite to the direction, each of the vent holes can be closed. Yes (corresponding to claim 2).

この発明の好ましい実施態様の他の一つにおいて、前記後部シャッターには、前記面口部材に形成された第１ねじ部に嵌合する第２ねじ部が形成されており、かつ、前記後部シャッターには、前記第１、第２ねじ部どうしが嵌合した前記後部シャッターをこれに所要の力を加えて前記面口部材から外れる方向へ回転させると前記面口部材の所要部位に当接してその回転を一時的に阻止し、その阻止に抗して前記外れる方向にさらに強い力を加えるとその当接が解けて前記後部シャッターが再び外れる方向への回転を可能にする第１ストッパー手段が設けられている（請求項３に対応）。 In another preferred embodiment of the present invention, the rear shutter has a second threaded portion that fits into a first threaded portion formed in the face opening member, and the rear shutter. When the rear shutter, in which the first and second screw portions are fitted, is rotated in a direction away from the face opening member by applying a required force to the rear shutter, the rear shutter comes into contact with the required portion of the face opening member. First stopper means that temporarily prevents the rotation and applies a stronger force in the direction of disengagement against the obstruction to release the abutment so that the rear shutter can be rotated again. Provided (corresponding to claim 3).

この発明の好ましい実施態様のさらに他の一つにおいて、前記前部シャッターおよび後部シャッターの少なくとも一方には、完全に開いた位置から閉じる方向への回転の始動および完全に閉じた位置から開く方向への回転の始動の少なくとも一方を一時的に阻止するために前記円筒状部の所要部位に対して作用する第２ストッパー手段が設けられている（請求項４に対応）。 In still another preferred embodiment of the present invention, at least one of the front shutter and the rear shutter is started to rotate from the fully open position to the closing direction and from the fully closed position to the opening direction. In order to temporarily prevent at least one of the start of rotation of the cylinder portion, second stopper means is provided which acts on a required portion of the cylindrical portion (corresponding to claim 4).

この発明に係るフィルタユニットは、円筒状部の前端部分と後端部分とにシャッターが設けられているから、このフィルタユニットを廃棄するときには、そのシャッターを閉じることによって、フィルタユニットに捕集された物質がフィルタユニットの前後両端部分から飛散することを簡単に防ぐことができる。 Since the filter unit according to the present invention is provided with shutters at the front end portion and the rear end portion of the cylindrical portion, when the filter unit is discarded, the filter unit is collected by closing the shutter. It is possible to easily prevent the material from scattering from the front and rear end portions of the filter unit.

請求項２に係る実施態様によれば、フィルタユニットを面口部材に取り付けるときに、フィルタユニットの円筒状部に対してフィルタユニットを回転させる方向と同じ方向に前部シャッターと後部シャッターとが回転すると、前端部分と後端部分との通気孔が開き、また、フィルタユニットを面口部材からはずすときには、フィルタユニットを回転させる方向と同じ方向に前部シャッターと後部シャッターとが回転すると通気孔が閉じるので、通気孔を開閉しようとするときにこれら両シャッターの回転させるべき方向を誤ることがない。 According to the embodiment of the second aspect, when the filter unit is attached to the face opening member, the front shutter and the rear shutter rotate in the same direction as the direction in which the filter unit is rotated with respect to the cylindrical portion of the filter unit. Then, the vent holes in the front end portion and the rear end portion are opened, and when the filter unit is removed from the face opening member, the vent holes are opened when the front shutter and the rear shutter rotate in the same direction as the direction in which the filter unit is rotated. Since it is closed, there is no mistake in the direction in which these shutters should be rotated when opening or closing the vent hole.

請求項３に係る実施態様によれば、後部シャッターに第１ストッパー手段が設けられることによって、フィルタユニットを面口部材から外すときに、前部シャッターまたは円筒状部を持ってフィルタユニットを回転させると、後部シャッターがフィルタユニット後端部の通気孔を閉じてから、フィルタユニットを面口部材から外すことができるようになる。 According to the embodiment of the third aspect, the first shutter means is provided in the rear shutter, so that when the filter unit is removed from the face opening member, the filter unit is rotated by holding the front shutter or the cylindrical portion. Then, after the rear shutter closes the vent hole at the rear end of the filter unit, the filter unit can be removed from the face opening member.

請求項４に係る実施態様によれば、前部シャッターおよび後部シャッターの少なくとも一方に第２ストッパー手段を設けることによって、その一方のシャッターが完全に開いた状態から閉じる方向、または完全に閉じた状態から開く方向へ不必要に回転することを防止できる。 According to the embodiment of claim 4, by providing the second stopper means on at least one of the front shutter and the rear shutter, the one shutter is closed from the fully opened state, or is completely closed. Can be prevented from rotating unnecessarily in the opening direction.

添付の図面を参照して、この発明に係るフィルタユニットの詳細を説明すると、以下のとおりである。 The details of the filter unit according to the present invention will be described with reference to the accompanying drawings.

図１は、マスク１の斜視図である。マスク１は、着用者の口許と鼻腔とを覆うことが可能な面口部材２と、面口部材２に取り付けられたこの発明に係るフィルタユニット３とを含んでいる。面口部材２は、その前方部分にフィルタユニット３を取り付けるための連結部４を有し、後方部分にヘッドバンド６を有する。フィルタユニット３は、面口部材２寄りに位置する後方部分が連結部４に交換可能に取り付けられており、後方部分の反対側である前方部分に複数の開閉可能な第１、第２通気孔７，１９（図４参照）を有し、図ではその通気孔７，１９が開いた状態にある。 FIG. 1 is a perspective view of the mask 1. The mask 1 includes a face mouth member 2 capable of covering the mouth and nasal cavity of the wearer, and a filter unit 3 according to the present invention attached to the face mouth member 2. The face opening member 2 has a connecting portion 4 for attaching the filter unit 3 to the front portion thereof, and has a headband 6 on the rear portion thereof. The filter unit 3 has a rear portion located near the face opening member 2 attached to the connecting portion 4 in a replaceable manner, and a plurality of first and second vent holes that can be opened and closed in a front portion opposite to the rear portion. 7 and 19 (see FIG. 4), and in the figure, the vent holes 7 and 19 are open.

図２，３，４は、面口部材２から外したフィルタユニット３の斜視図と、同図のＩＩＩ−ＩＩＩ線矢視図と、図３のフィルタユニット３の分解斜視図とであって、図３では面口部材２の連結部４の外形が仮想線で示されている。また、図４では、濾材１０の図示が省かれている。フィルタユニット３は、活性炭等の濾材１０を収納しており前後方向から見たときの平面形状が円形をなす容器部１１と、容器部１１とは別体のものであって容器部１１の前面側に設けられた前方シャッター部材１２と、容器部１１とは別体のものであって容器部１１の後面側に設けられた後方シャッター部材１３とを有する。容器部１１は、本体１６と裏ぶた１７とからなり、本体１６の前面には前方へ延びる支軸１８と、支軸１８からその径方向へ放射状に広がる複数の第２通気孔１９と、個々には弧を画いており全体としては支軸１８を中心にした環を成すように間欠的に並んでいる複数の第１透孔２１とが形成されており、本体１６の後方には容器部１１の後面を形成する裏ぶた１７が嵌められている。裏ぶた１７は、中央部透孔２２と、中央部透孔２２から径方向へ放射状に広がる複数の第３通気孔２３と、個々には弧を画き、全体としては環状を成すように間欠的に並んでいる複数の第２透孔２４と、中央部透孔２２から径方向へ放射状に延びる複数条のリブ２６と、本体１６に外側から嵌合するように形成された縁部２７とを有する。複数条のリブ２６は、リブ２６どうしの間に吸気が濾材１０を通って第３通気孔２３へと向かうための流路を形成している。前方シャッター部材１２は、中央部透孔３１と、中央部透孔３１から径方向へ放射状に広がる第１通気孔７と、本体１６の前面側に外側から嵌合する縁部３２とを有する。後方シャッター部材１３は、前方部分１３ａと後方部分１３ｂとを有し、その前方部分１３ａの径方向の中心には前方へ突出する支軸４１を有し、支軸４１の周囲からは複数のリブ４２が放射状に延びて前方部分１３ａの周縁部４３に達している。その周縁部４３には、前方へ向かって延びる複数の突起４４が後方シャッター部材１３の周方向において間欠的に形成されている。リブ４２と周縁部４３とは複数の扇形の凹部４６を形成している。凹部４６には底４５（図９参照）が形成されている第１凹部４６ａと、底４５が形成されていない第２凹部４６ｂとがあって、これら第１、第２凹部４６ａ，４６ｂが支軸４１の周りに交互に並んでいる。この第２凹部４６ｂは、後方シャッター部材１３の後方に向かって開口しており、フィルタユニット３における第４通気孔４７を形成している。後方シャッター部材１３の後方部分１３ｂは、円筒状を成しており、外周面には面口部材２の連結部４に形成された雌ねじ４ａに螺合する雄ねじ４８が形成されている。第４通気孔４７は、後方部分１３ｂの内側に開口しており、その内側は面口部材２に対して通気可能につながっている。 2, 3, and 4 are a perspective view of the filter unit 3 removed from the face opening member 2, a view taken along line III-III in FIG. 3, and an exploded perspective view of the filter unit 3 in FIG. 3, In FIG. 3, the outer shape of the connecting portion 4 of the face opening member 2 is indicated by a virtual line. In FIG. 4, the filter medium 10 is not shown. The filter unit 3 contains a filter medium 10 such as activated carbon, and the container part 11 having a circular planar shape when viewed from the front-rear direction is separate from the container part 11, and is a front surface of the container part 11. The front shutter member 12 provided on the side and the rear shutter member 13 provided on the rear side of the container portion 11 are separate from the container portion 11. The container portion 11 includes a main body 16 and a back lid 17. A front shaft 18 has a support shaft 18 extending forward and a plurality of second vent holes 19 extending radially from the support shaft 18 in the radial direction. Is formed with a plurality of first through holes 21 that are arranged intermittently so as to form a ring centered on the support shaft 18 as a whole. A back lid 17 forming the rear surface is fitted. The back lid 17 includes a central through hole 22 and a plurality of third vent holes 23 that radially extend from the central through hole 22, and each of them has an arc, and is intermittently formed in an annular shape as a whole. A plurality of second through holes 24 arranged in a line, a plurality of ribs 26 extending radially from the central part through hole 22 in a radial direction, and an edge 27 formed so as to be fitted to the main body 16 from the outside. . The plurality of ribs 26 form a flow path between the ribs 26 for the intake air to pass through the filter medium 10 toward the third vent hole 23. The front shutter member 12 includes a central through hole 31, a first vent hole 7 that radially extends from the central through hole 31, and an edge 32 that fits from the outside to the front side of the main body 16. The rear shutter member 13 has a front portion 13a and a rear portion 13b, and has a support shaft 41 protruding forward at the center in the radial direction of the front portion 13a, and a plurality of ribs from the periphery of the support shaft 41. 42 extends radially and reaches the peripheral edge 43 of the front portion 13a. A plurality of protrusions 44 extending forward are intermittently formed on the peripheral edge 43 in the circumferential direction of the rear shutter member 13. The rib 42 and the peripheral edge 43 form a plurality of fan-shaped recesses 46. The concave portion 46 includes a first concave portion 46a in which a bottom 45 (see FIG. 9) is formed and a second concave portion 46b in which the bottom 45 is not formed. These first and second concave portions 46a and 46b are supported. They are arranged alternately around the axis 41. The second recess 46 b opens toward the rear of the rear shutter member 13 and forms a fourth vent hole 47 in the filter unit 3. The rear portion 13b of the rear shutter member 13 has a cylindrical shape, and a male screw 48 is formed on the outer peripheral surface of the rear shutter member 13 so as to be screwed into the female screw 4a formed in the connecting portion 4 of the surface port member 2. The fourth vent hole 47 is opened to the inside of the rear portion 13b, and the inside thereof is connected to the face opening member 2 so as to allow ventilation.

図５は、前方シャッター部材１２の斜視図であって、この部材１２をフィルタユニット３の後方から見たときの状態を示している。部材１２の後面には扇状の第１通気孔７の周囲にリブ５１が形成されている。また、中央部透孔３１を中心とする同一円周上に後方へ向かって延びる複数の突起５２が間欠的に形成されている。 FIG. 5 is a perspective view of the front shutter member 12 and shows a state when the member 12 is viewed from the rear of the filter unit 3. Ribs 51 are formed on the rear surface of the member 12 around the fan-shaped first vent hole 7. Further, a plurality of protrusions 52 extending rearward are formed intermittently on the same circumference with the central through hole 31 as the center.

再び図４おいて、この図に示されている各部材は、中心線Ｃ−Ｃを共有するものであって、次のように組み立てられる。まず、容器部１１の本体１６に所要の濾材１０を充填し、次いで裏ぶた１７を閉じる。本体１６の外周面と裏ぶた１７の縁部２７の内周面とは、圧着させたり、接着剤を使用したりすることによって両面間を気密状態にする。本体１６に対しては、その前面側に前方シャッター部材１２を取り付ける。本体１６の支軸１８は、その径が小さくなる方向へ弾性変形するように作られており、前方シャッター部材１２の中央部透孔３１に対して圧入することができる。圧入した後には、支軸１８の先端拡径部が弾性的に元の形状に復帰して前方シャッター部材１２の前面に前方から当接し（図３参照）、容器部１１と前方シャッター部材１２とが支軸１８を中心に回転可能に一体化する。このように一体化したときには、前方シャッター部材１２におけるリブ５１が本体１６の前面に対して摺動可能に密着し、それぞれの突起５２が本体１６の第１透孔２１に進入している。前方シャッター部材１２が支軸１８を中心に回転するときに、突起５２もまた支軸１８を中心にして弧を画いている第１透孔２１の内側を動き、突起５２が第１透孔２１の両端それぞれに当接すると前方シャッター部材１２の回転が止まる。このように、前方シャッター部材１２が回転する範囲は、第１透孔２１と突起５２とによって規制されている。また、前方シャッター部材１２は、支軸１８を中心に矢印Ａで示される時計方向へ止まるまで回転すると、第１通気孔７と第２通気孔１９とが符合して、前方シャッター部材１２と容器部１１との間が通気可能な状態になる。この状態にある前方シャッター部材１２は、矢印Ｂで示される反時計方向へ止まるまで回転すると、第１通気孔７が本体１６の第２通気孔１９どうしの間に位置して、第２通気孔１９を閉じることができる。第２通気孔１９が閉じた容器部１１は、その前方が密閉された状態にある。 In FIG. 4 again, the members shown in this figure share the center line CC, and are assembled as follows. First, the required filter medium 10 is filled in the main body 16 of the container portion 11, and then the back lid 17 is closed. The outer peripheral surface of the main body 16 and the inner peripheral surface of the edge portion 27 of the back lid 17 are brought into an airtight state between both surfaces by pressure bonding or using an adhesive. The front shutter member 12 is attached to the front side of the main body 16. The support shaft 18 of the main body 16 is formed so as to be elastically deformed in a direction in which the diameter is reduced, and can be press-fitted into the central through hole 31 of the front shutter member 12. After the press-fitting, the tip enlarged diameter portion of the support shaft 18 elastically returns to its original shape and comes into contact with the front surface of the front shutter member 12 from the front (see FIG. 3), and the container portion 11 and the front shutter member 12 Are integrated so as to be rotatable around the support shaft 18. When integrated in this way, the ribs 51 in the front shutter member 12 are slidably in contact with the front surface of the main body 16, and the respective protrusions 52 enter the first through holes 21 of the main body 16. When the front shutter member 12 rotates about the support shaft 18, the protrusion 52 also moves inside the first through hole 21 that defines an arc around the support shaft 18, and the protrusion 52 moves to the first through hole 21. The front shutter member 12 stops rotating. Thus, the range in which the front shutter member 12 rotates is restricted by the first through hole 21 and the protrusion 52. When the front shutter member 12 rotates about the support shaft 18 in the clockwise direction indicated by the arrow A, the first vent hole 7 and the second vent hole 19 coincide with each other, and the front shutter member 12 and the container It becomes a state which can ventilate between the parts 11. When the front shutter member 12 in this state is rotated until it stops in the counterclockwise direction indicated by the arrow B, the first ventilation hole 7 is positioned between the second ventilation holes 19 of the main body 16, and the second ventilation hole 19 can be closed. The container part 11 with the second vent hole 19 closed is in a state where the front thereof is sealed.

次に、容器部１１の裏ぶた１７における中央部透孔２２に後方シャッター部材１３の支軸４１を後方から挿入する。挿入される支軸４１は、その径が小さくなる方向への弾性変形下に先端拡径部が中央部透孔２２を通過し、通過し終わると拡径部が弾性的に元の形状に復帰して裏ぶた１７の前面に前方から当接し、後方シャッター部材１３が裏ぶた１７に取り付けられる（図３参照）。後方シャッター部材１３は、裏ぶた１７に取り付けられるときに、突起４４のそれぞれが裏ぶた１７の第２透孔２４のそれぞれに進入する。第２透孔２４それぞれに進入した突起４４は、裏ぶた１７を取り付けた容器部１１が支軸４１を中心に矢印Ａおよび矢印Ｂで示される時計方向と反時計方向とに回転すると、弧状の第２透孔２４の両端それぞれに当接して、容器部１１の後方シャッター部材１３に対する回転範囲を規制することができる。このような容器部１１における裏ぶた１７と後方シャッター部材１３との間では、容器部１１が時計方向Ａに回転して、その回転が止まると、裏ぶた１７における第３通気孔２３と後方シャッター部材１３における第２凹部４６ｂである第４通気孔４７とが符合して、容器部１１と後方シャッター部材１３との間が通気可能な状態になる。また、そのような状態にある容器部１１が反時計方向Ｂへ回転して、その回転が止まると、裏ぶた１７は、第３通気孔２３が後方シャッター部材１３における非通気性の第１凹部４６ａに符合すると同時に後方シャッター部材１３の第４通気孔４７を前方から閉じて、容器部１１と後方シャッター部材１３との間が通気不能な状態になる。即ち、容器部１１は、その後方が密閉状態になる。 Next, the support shaft 41 of the rear shutter member 13 is inserted from the rear into the central through hole 22 in the back lid 17 of the container portion 11. As for the inserted support shaft 41, the diameter-expanded portion of the tip passes through the central through-hole 22 under elastic deformation in a direction in which the diameter decreases, and the diameter-expanded portion elastically returns to its original shape when it has passed. Then, it contacts the front surface of the back lid 17 from the front, and the rear shutter member 13 is attached to the back lid 17 (see FIG. 3). When the rear shutter member 13 is attached to the back cover 17, each of the protrusions 44 enters each of the second through holes 24 of the back cover 17. The protrusions 44 that have entered the respective second through holes 24 are arcuately formed when the container portion 11 with the back lid 17 is rotated about the support shaft 41 in the clockwise and counterclockwise directions indicated by the arrows A and B. The rotation range of the container part 11 with respect to the rear shutter member 13 can be regulated by contacting both ends of the two through holes 24. Between the back lid 17 and the rear shutter member 13 in the container portion 11, when the container portion 11 rotates clockwise A and stops rotating, the third vent hole 23 and the rear shutter member 13 in the back lid 17 are stopped. The fourth vent hole 47, which is the second recess 46b, is aligned with the container 11 and the rear shutter member 13 can be vented. Further, when the container portion 11 in such a state rotates counterclockwise B and stops rotating, the back cover 17 has a third vent hole 23 in the rear shutter member 13 that is not air permeable first recess 46a. At the same time, the fourth vent hole 47 of the rear shutter member 13 is closed from the front, and the space between the container portion 11 and the rear shutter member 13 is not vented. That is, the container part 11 is hermetically sealed at the rear.

図６，７は、容器部１１における本体１６と前方シャッター部材１２との部分破断斜視図であって、本体１６に対する前方シャッター部材１２の回転状態を示している。図６は、図１の状態にある本体１６と前方シャッター部材１２とを示している。前方シャッター部材１２は、支軸１８を中心に本体１６に対して時計方向Ａへ回転し、突起５２が第１透孔２１の端部に接触するとともに第１通気孔７と第２通気孔１９とが符合している。図７の前方シャッター部材１２は、図６の状態にあるものが本体１６に対して反時計方向Ｂへ回転し、突起５２が第１透孔２１の端部に接触してその回転が止まっている。前方シャッター部材１２の第１通気孔７は、本体１６における第２通気孔１９どうしの間に位置している。一方、前方シャッター部材１２のリブ５１は第２通気孔１９の縁に沿って本体１６の前面に摺動可能に密着しているから、本体１６の第２通気孔１９は、その前方に位置する前方シャッター部材１２によって実質的に閉じられた状態にある。 6 and 7 are partially broken perspective views of the main body 16 and the front shutter member 12 in the container portion 11, and show a rotation state of the front shutter member 12 with respect to the main body 16. FIG. 6 shows the main body 16 and the front shutter member 12 in the state of FIG. The front shutter member 12 rotates about the support shaft 18 in the clockwise direction A with respect to the main body 16, and the protrusion 52 contacts the end portion of the first through hole 21 and the first and second vent holes 7 and 19. And are in agreement. The front shutter member 12 shown in FIG. 7 rotates in the counterclockwise direction B with respect to the main body 16 in the state shown in FIG. 6, and the protrusion 52 comes into contact with the end portion of the first through hole 21 to stop its rotation. Yes. The first vent hole 7 of the front shutter member 12 is located between the second vent holes 19 in the main body 16. On the other hand, the rib 51 of the front shutter member 12 is slidably in close contact with the front surface of the main body 16 along the edge of the second vent hole 19, so that the second vent hole 19 of the main body 16 is located in front of it. The front shutter member 12 is substantially closed.

図８，９は、容器部１１における裏ぶた１７と後方シャッター部材１３との部分破断斜視図であって、後方シャッター部材１３に対する裏ぶた１７の回転状態を示している。図８は、図１の状態にある裏ぶた１７と後方シャッター部材１３とを示している。裏ぶた１７は、支軸４１を中心に後方シャッター部材１３に対して時計方向Ａへ回転し、突起４４が第２透孔２４の端部に接触してその回転が止まり、第３通気孔２３と第４通気孔４７とが符合している。図９の裏ぶた１７は、図８の状態にあるものが後方シャッター部材１３に対して反時計方向Ｂへ回転し、突起４４が第２透孔２４の端部に接触してその回転が止まっている。後方シャッター部材１３において第１凹部４６ａを画成しているリブ４２が第３通気孔２３の縁部に対して摺動可能に密着しているから、裏ぶた１７の第３通気孔２３は、後方シャッター部材１３における第４通気孔４７どうしの間、即ち有底の第１凹部４６ａの前方にあって、実質的に閉じた状態にある。 FIGS. 8 and 9 are partially broken perspective views of the back cover 17 and the rear shutter member 13 in the container portion 11, and show the rotation state of the back cover 17 with respect to the rear shutter member 13. FIG. 8 shows the back cover 17 and the rear shutter member 13 in the state of FIG. The back lid 17 rotates in the clockwise direction A with respect to the rear shutter member 13 around the support shaft 41, and the protrusion 44 comes into contact with the end of the second through hole 24 to stop its rotation. The fourth vent hole 47 matches. The back cover 17 shown in FIG. 9 rotates in the counterclockwise direction B with respect to the rear shutter member 13 in the state shown in FIG. 8, and the protrusion 44 contacts the end of the second through hole 24 to stop its rotation. Yes. Since the rib 42 defining the first recess 46 a in the rear shutter member 13 is slidably adhered to the edge of the third vent hole 23, the third vent hole 23 of the back cover 17 The shutter member 13 is substantially closed between the fourth vent holes 47, that is, in front of the bottomed first recess 46a.

かように形成されているフィルタユニット３は、これを図１において時計方向Ａへ回転させるようにして、後方シャッター部材１３の後方部分１３ｂを面口部材２の連結部４に対して螺合させる。そのときに、容器部１１と、前方シャッター部材１２と、後方シャッター部材１３とのそれぞれを時計方向Ａへそれぞれの回転が止まるまで回転させると、第１通気孔７と第２通気孔１９、および第３通気孔２３と第４通気孔４７が符合して、マスク１が吸気可能な状態、即ち、マスク１が使用可能な状態になる。また、使用後のフィルタユニット３を面口部材２から外すときには、前方シャッター部材１２を容器部１１に対して反時計方向Ｂへ止まるまで回転させると、容器部１１の第２、第３通気孔１９，２３が閉じた状態になる。この状態にあるフィルタユニット３は、濾材１０で捕集したものがフィルタユニット３の外へ飛散することがなく、これを焼却施設等の廃棄処分場にまで安全に運ぶことができる。 The filter unit 3 formed in this way is rotated in the clockwise direction A in FIG. 1 so that the rear portion 13b of the rear shutter member 13 is screwed to the connecting portion 4 of the face opening member 2. . At that time, when the container part 11, the front shutter member 12, and the rear shutter member 13 are rotated in the clockwise direction A until the respective rotations stop, the first vent hole 7, the second vent hole 19, and The third vent hole 23 and the fourth vent hole 47 coincide with each other so that the mask 1 can be sucked, that is, the mask 1 can be used. Further, when removing the used filter unit 3 from the face opening member 2, if the front shutter member 12 is rotated with respect to the container part 11 until it stops in the counterclockwise direction B, the second and third ventilation holes of the container part 11 are obtained. 19 and 23 are closed. In the filter unit 3 in this state, the material collected by the filter medium 10 is not scattered outside the filter unit 3 and can be safely transported to a disposal site such as an incineration facility.

図１０は、本体１６の部分拡大平面図であって、第１透孔２１の好ましい形状の一例が示されている。この図にはまた、前方シャッター部材１２の突起５２が仮想線で示されている。第１透孔２１は、両端部７１，７２と、これら両端部７１，７２間の中間部７３とを有する。両端部７１，７２は、直径Ｑを有する円の一部によって形成されており、中間部７３は一様な幅Ｒを有している。第１透孔２１の中を図の左右方向へ動く突起５２は、直径Ｐを有する円柱である。第１透孔２１において、直径Ｑは突起５２の直径Ｐよりも大きく作られている。また、幅Ｒは、直径Ｑよりも小さく、かつ突起５２が左右方向に摺動可能な程度に作られている。このような第１透孔２１では、両端部７１，７２にある突起５２が、それに特に力を加えられなければ中間部７３へ進入することがない。それゆえ、前方シャッター部材１２は、第２透孔１９を完全に閉じる位置および完全に開く位置のそれぞれにあるときに、その位置から反対の方向に向かって簡単に動くということがない。このような第１透孔２１と突起５２との形状は、第２透孔２４と突起４４とに適用することができる。なお、この発明は、第１、第２透孔２１，２４それぞれについて、両端部の直径と中間部の幅を一様にして実施することも可能である。 FIG. 10 is a partially enlarged plan view of the main body 16 and shows an example of a preferable shape of the first through hole 21. Also in this figure, the projection 52 of the front shutter member 12 is indicated by a virtual line. The first through hole 21 has both end portions 71 and 72 and an intermediate portion 73 between the both end portions 71 and 72. Both end portions 71 and 72 are formed by a part of a circle having a diameter Q, and the intermediate portion 73 has a uniform width R. The protrusion 52 that moves in the left-right direction in the figure through the first through hole 21 is a cylinder having a diameter P. In the first through hole 21, the diameter Q is made larger than the diameter P of the protrusion 52. Further, the width R is smaller than the diameter Q, and is formed to such an extent that the protrusion 52 can slide in the left-right direction. In such a first through hole 21, the protrusions 52 at both end portions 71 and 72 do not enter the intermediate portion 73 unless a force is particularly applied thereto. Therefore, the front shutter member 12 does not easily move in the opposite direction from the position when the second through hole 19 is in the fully closed position and the fully open position. Such shapes of the first through holes 21 and the protrusions 52 can be applied to the second through holes 24 and the protrusions 44. In addition, this invention can also be implemented by making the diameter of both ends and the width of the middle part uniform for each of the first and second through holes 21 and 24.

図１１は、この発明の実施態様の一例を示す図３と同様な図であり、図１２は、図１１のフィルタユニット３のアーム８１が連結部４の可動突起８４に接触している使用状態を示すフィルタユニット３の側面図である。図１１のフィルタユニット３における後方シャッター部材１３は、その後方部分１３ｂに外周面から径方向外方へＬ字を画くように延びるストッパー用アーム８１を有する。アーム８１は、その先端部分８２が円錐形を成している。図１２において、アーム８１は、先端部分８２が面口部材２の連結部４に形成された制動部８３における可動突起８４の円錐形先端部分に図の下方から当接している。制動部８３は、突起８４を図の左方、即ち裏ぶた１７に向かって付勢するばね（図示せず）を内蔵しており、突起８４は双頭矢印Ｘ方向に移動可能である。図示例のフィルタユニット３では、連結部４に螺合している後方シャッター部材１３を所要の力で反時計方向Ｂへ回転させると、図１２の如くアーム８１が可動突起８４に当接したところで、その回転が一時停止する。後方シャッター部材１３に対して反時計方向Ｂへのさらに強い力が作用すると、円錐形の斜面を押された可動突起８４が図の右方へ移動して、アーム８１が可動突起８４を乗り越える。後方シャッター部材１３は、再び回転を始め、やがて連結部４から外れる。一方、フィルタユニット３は、前方シャッター部材１２が容器部１１に対して反時計方向Ｂへ回転して第２通気孔１９を完全に閉じるような前方シャッター部材１２の動き、および連結部４に螺合している後方シャッター部材１３に対して容器部１１が反時計方向Ｂへ回転して第３通気孔２３が完全に閉じるような容器部１１の動きに対しては大きな力を必要とすることがないように、換言すると、前方シャッター部材１２も容器部１１も小さな力で簡単に回転するように作られている。その力は、後方シャッター部材１３のアーム８１が可動突起８４を乗り越えるのに要する力よりも弱く、したがって、面口部材２に取り付けたフィルタユニット３は、前方シャッター部材１２を持って、これを反時計方向Ｂへ回転させれば、容器部１１の第２、第３通気孔１９，２３を完全に閉じた状態にして面口部材２から外すことができる。このようにして外れた使用後のフィルタユニット３では、捕集した物質で飛散の防止がより一層確実になる。フィルタユニット３を面口部材２から外すときに、後方シャッター部材１３の回転を一時的に止めるためのストッパー手段として作用するアーム８１は、フィルタユニット３を面口部材２に取り付けるときにも、制動部８３と協働するストッパー手段として作用する。フィルタユニット３は、前方シャッター部材１２を持って時計方向Ａへ回転させるようにして面口部材２に取り付けると、アーム８１が制動部８３に当接して後方シャッター部材１３の回転が一時的に止まり、その間に容器部１１の第２、第３通気孔１９，２３を開放状態にすることができる。第２、第３通気孔が開放したフィルタユニット３をさらに時計方向Ａへ回転させると、アーム８１が可動突起８４を乗り越えてフィルタユニット３が面口部材２に取り付けられる。なお、この発明は、図１１に例示のフィルタユニット３に代えて、後方シャッター部材１３に図１２に例示の如き可動突起を設け、面口部材２にアーム８１に匹敵する固定突起を設けて実施することも可能である。また、アーム８１の先端部分８２と可動突起８４の先端部分との形状は、それぞれを球面状にしたり、一方のみを円錐状や球面状にしてもう一方を板状にしたりすることもできる。 11 is a view similar to FIG. 3 showing an example of the embodiment of the present invention, and FIG. 12 is a use state in which the arm 81 of the filter unit 3 of FIG. 11 is in contact with the movable protrusion 84 of the connecting portion 4. It is a side view of the filter unit 3 which shows. The rear shutter member 13 in the filter unit 3 of FIG. 11 has a stopper arm 81 that extends in a rear portion 13b so as to draw an L shape radially outward from the outer peripheral surface. The end portion 82 of the arm 81 has a conical shape. In FIG. 12, the arm 81 is in contact with the conical tip portion of the movable protrusion 84 in the braking portion 83 formed at the connecting portion 4 of the face opening member 2 from the lower side of the drawing. The braking portion 83 incorporates a spring (not shown) that urges the protrusion 84 toward the left side of the drawing, that is, toward the back lid 17, and the protrusion 84 is movable in the double-headed arrow X direction. In the illustrated filter unit 3, when the rear shutter member 13 screwed into the connecting portion 4 is rotated counterclockwise B with a required force, the arm 81 comes into contact with the movable protrusion 84 as shown in FIG. , Its rotation pauses. When a stronger force in the counterclockwise direction B acts on the rear shutter member 13, the movable protrusion 84 pushed on the conical slope moves to the right in the figure, and the arm 81 gets over the movable protrusion 84. The rear shutter member 13 starts to rotate again and eventually comes off the connecting portion 4. On the other hand, in the filter unit 3, the movement of the front shutter member 12 such that the front shutter member 12 rotates counterclockwise B with respect to the container part 11 to completely close the second vent hole 19, and the connection part 4 is screwed. A large force is required for the movement of the container part 11 such that the container part 11 rotates counterclockwise B with respect to the rear shutter member 13 and the third vent hole 23 is completely closed. In other words, the front shutter member 12 and the container part 11 are made to rotate easily with a small force. The force is weaker than the force required for the arm 81 of the rear shutter member 13 to get over the movable protrusion 84. Therefore, the filter unit 3 attached to the face opening member 2 has the front shutter member 12 and counteracts this. When rotated clockwise B, the second and third vent holes 19 and 23 of the container portion 11 can be completely closed and removed from the face opening member 2. In the filter unit 3 after use which has been detached in this way, the prevention of scattering is further ensured by the collected substance. When the filter unit 3 is removed from the face opening member 2, the arm 81 acting as a stopper means for temporarily stopping the rotation of the rear shutter member 13 is also braked when the filter unit 3 is attached to the face opening member 2. Acts as a stopper means cooperating with the part 83. When the filter unit 3 is attached to the face opening member 2 so as to hold the front shutter member 12 and rotate in the clockwise direction A, the arm 81 comes into contact with the braking portion 83 and the rotation of the rear shutter member 13 is temporarily stopped. In the meantime, the second and third vent holes 19 and 23 of the container part 11 can be opened. When the filter unit 3 with the second and third vent holes opened is further rotated clockwise A, the arm 81 gets over the movable protrusion 84 and the filter unit 3 is attached to the face opening member 2. In the present invention, instead of the filter unit 3 illustrated in FIG. 11, the rear shutter member 13 is provided with a movable protrusion as illustrated in FIG. 12, and the face opening member 2 is provided with a fixed protrusion comparable to the arm 81. It is also possible to do. Further, the shape of the distal end portion 82 of the arm 81 and the distal end portion of the movable protrusion 84 can be each spherical, or only one can be conical or spherical, and the other can be plate-shaped.

この発明によれば、廃棄するときに捕集物質が飛散することのないフィルタユニットの製造が可能になる。 According to the present invention, it is possible to manufacture a filter unit in which the collected substance does not scatter when discarded.

フィルタユニットが使用されているマスクの斜視図。The perspective view of the mask in which the filter unit is used. フィルタユニットの斜視図。The perspective view of a filter unit. フィルタユニットの断面図。Sectional drawing of a filter unit. フィルタユニットの分解斜視図。The disassembled perspective view of a filter unit. 前方シャッター部材の斜視図。The perspective view of a front shutter member. 通気孔が開いている前方シャッター部材と本体との部分破断斜視図。The fragmentary perspective view with a front shutter member and a main body with which the vent hole is open. 通気孔が閉じている前方シャッター部材と本体との部分破断斜視図。The fragmentary perspective view with a front shutter member and a main body with which the vent hole is closed. 通気孔が開いている裏ぶたと後方シャッター部材との部分破断斜視図。The partial fracture | rupture perspective view of the back cover and back shutter member with which the vent hole is open. 通気孔が閉じている裏ぶたと後方シャッター部材との部分破断斜視図。FIG. 6 is a partially broken perspective view of a back cover and a rear shutter member in which a ventilation hole is closed. 本体の部分拡大図。The elements on larger scale of a main body. 実施態様の一例を示す図３と同様な図。The figure similar to FIG. 3 which shows an example of an embodiment. 図１１のフィルタユニットのアームが連結部の可動突起に接触している状態を示す図。The figure which shows the state which the arm of the filter unit of FIG. 11 is contacting the movable protrusion of a connection part.

Explanation of symbols

１マスク
２面口部材
３フィルタユニット
４ａ第１ねじ部（雌ねじ）
１０濾材
１２前部シャッター
１３後部シャッター
１９通気孔
２３通気孔
４４第２ストッパー手段
４８第２ねじ部（雄ねじ）
５２第２ストッパー手段
８１第１ストッパー手段
８３所要部位 DESCRIPTION OF SYMBOLS 1 Mask 2 Face opening member 3 Filter unit 4a 1st thread part (female thread)
DESCRIPTION OF SYMBOLS 10 Filter medium 12 Front shutter 13 Rear shutter 19 Vent hole 23 Vent hole 44 2nd stopper means 48 2nd screw part (male screw)
52 Second stopper means 81 First stopper means 83 Required part

Claims

Ventilation holes are formed in both end portions of the cylindrical portion having a front end portion and a rear end portion, and a filter medium is filled between the both end portions, and the side of the rear end portion is the mouth of the mask wearer and the nasal cavity. A filter unit that is attached to and detached from a face opening member that covers
The filter unit, wherein the front end portion and the rear end portion are provided with a front shutter and a rear shutter for opening and closing the air holes formed respectively.

The filter unit is attached to the face port member by rotating about the axis of the cylindrical portion, and the front shutter and the rear shutter are separate from the cylindrical portion. It is formed so as to be rotatable about the axis with respect to the cylindrical portion, and rotates in the same direction as the direction of rotation when the filter unit is attached to the face opening member with respect to the cylindrical portion. 2. The filter unit according to claim 1, wherein the vent holes of the front end portion and the rear end portion can be opened by rotating the vent holes, and the vent holes can be closed by rotating in the direction opposite to the direction.

The rear shutter has a second threaded portion that fits into the first threaded portion formed in the face opening member, and the rear shutter has the first and second threaded portions. When the rear shutter that has been fitted is rotated in a direction away from the face opening member by applying a required force to the rear shutter, it abuts against a required portion of the face opening member to temporarily prevent the rotation and resist the prevention. 3. The filter unit according to claim 2, further comprising a first stopper means for releasing the abutment when a stronger force is applied in the detaching direction and allowing the rear shutter to rotate in the detaching direction again.

At least one of the front shutter and the rear shutter is for temporarily preventing at least one of starting rotation from the fully open position to the closing direction and starting rotation from the fully closed position to the opening direction. The filter unit according to claim 2 or 3, further comprising second stopper means for acting on a required portion of the cylindrical portion.