JP3713650B2

JP3713650B2 - Small pump

Info

Publication number: JP3713650B2
Application number: JP36227197A
Authority: JP
Inventors: 幸一中次
Original assignee: Oken Seiko Co Ltd
Current assignee: Oken Seiko Co Ltd
Priority date: 1997-12-12
Filing date: 1997-12-12
Publication date: 2005-11-09
Anticipated expiration: 2017-12-12
Also published as: JPH11173273A

Description

【０００１】
【発明の属する技術分野】
本発明は、少なくとも１つあるポンプ室を形成するダイヤフラム部と弁室内に配置された弁体部とを一体に構成したダイヤフラム本体を備えた小型ポンプに関するものである。
【０００２】
【従来の技術】
従来のダイヤフラム部を有する小型ポンプは、三つのポンプ室（ダイヤフラム部）を有するポンプを例とすると図１２乃至図１７にに示す通りである。
【０００３】
これらの図において、図１２は平面図、図１１は図１２におけるＡ−Ａ断面図であり、図中１は小型直流モータ、２はモータ１の出力軸、３はカップ形に形成され底面がねじ４によりモータ１の出力軸側の面に取付けられたケース、５は出力軸２に固定されたカラー、６は出力軸２に対して所定角度傾斜し、かつその先端が出力軸２の中心軸上に存在するようにカラー５に固定された駆動軸、７は円板形に形成され１２０度間隔に設けられた３個の穴８を有する駆動体、９は駆動体７の中心に下方に伸びて一体に形成された筒形の支持部、１０は駆動軸６と駆動体７の間の摩擦を小さくするためのスチールボールである。支持部９は駆動部６にゆるくはめ込まれており、出力軸２が回転すると駆動軸６が傾斜した状態で回転するため、駆動体７は中心に対して穴８のある周辺部が順次上下動し、いわゆる皿回し運動をする。１１は図１３に示すように例えば円板状部材に三つの孔１２を形成しこれに三つのシリンダーを固定させた構成のシリンダー部で、円板状部材には三つのねじ孔１３が形成されている。
【０００４】
１４は柔らかいゴムからなる円板状に形成されたダイヤフラム本体で、その平面を図１４に、底面を図１５に示す。１５は１２０度間隔で本体から下方に伸びて一体に形成されたつり鐘形の３個のダイヤフラム部、１６はその中心の駆動部、１７は駆動部１６の先端に細い頚部を介して形成された頭部、１８は本体の中心部から上方に伸びる弁体部である。この弁体部は、ダイヤフラム本体１４と一体に形成され、図１７に拡大して示すように本体１４から上方に伸び（Ａ）のように円筒状をなしている。又、弁の開閉が容易になる等の理由から、図１７（Ｂ）に示すように、円筒形状のもの夫々弁となる部分の境界にスリット１８ｄを形成し、これによって三つのポンプ室に夫々対応する位置に夫々の弁１８ａ、１８ｂ、１８ｃの三つの弁を構成するようにした形状の弁体部が用いられることもある。頭部１７は駆動体７の穴８を貫通して駆動体７の下面側に突出ており、これによって駆動部１６は駆動体７に保持されている。ダイヤフラム本体１４の各ダイヤフラム部１５の中間の位置にはねじを通すための３個の穴１９が形成されている。
【０００５】
上記のようなダイヤフラム本体１４は、三つのダイヤフラム部１５、弁体部１８等を一体に構成したものでゴム等の弾性材料にて形成されている。尚図示する従来例は三つのダイヤフラム部を有するが、三つに限らず一般には一つ又は複数設けられている。
【０００６】
２０は１２０度間隔で底面に３個形成された円形の凹部２１を有するバルブハウジングを兼ねた蓋体で、その底面図を図１６に示す。２２は凹部２１の中心に形成された孔、２３は孔２２の周囲に各６個形成された吸気孔、２４は蓋体２０の中心部に上方に向かって形成された弁室部、２５は弁室部２４の先端が細くなって形成された排気孔である。なお、図１２、図１６に示された２６は各孔２２の中間の位置にねじを通すために３個形成された孔である。２７は孔２６、穴１９を貫通してねじ孔１３にねじ込まれるねじである。このねじ込みによって、蓋体２０はダイヤフラム本体１４を挟んでシリンダー部１１に固定され、蓋体２０の凹部２１とダイヤフラム部１５とによって３個のポンプ室２８が形成される。蓋体２０は弁室部２４内に共通室２９が形成され、各凹部２１は内方（蓋体の中心の方向）に切欠き状の溝部３０が形成されてそれぞれ共通室２９につながっている。従って、各ポンプ室２８は共通室２９に中心部で共通に連通されていることになる。なお、弁体部１８は弁室部２４の内周面に接触しており、この連通路を塞ぐようになっている。
【０００７】
３１は柔らかいゴムからなる傘形の弁体、３２は弁体３１の中心に上方に伸びて一体に形成された支持柱、３３は支持柱３２の先端に形成されたこれより太い頭部である。弁体３１は吸気孔２３を十分に覆うような大きさに形成されており、支持柱３２が孔２２を貫通して頭部３３が外側に出て蓋体２０に抜けないように取り付けられている。
【０００８】
次に、このように構成された小型ポンプの動作について説明する。モータ１が通電されて出力軸２が回転すると駆動軸６も回転し、これにより駆動体７が皿まわし運動をして各ダイヤフラム部１５の駆動部１６は１２０度の位相差で上下方向に振動する。このダイヤフラム部のピストン運動で、ポンプ室２８は容積が周期的に変化する。駆動部１６が下方に移動して容積が増えるときは、ポンプ室２８は減圧されて弁体部１８は弁室部２４に密着して閉じ、反対に弁体３１は開いて吸気孔２３から空気が流入する。次に、駆動部１６が上方に移動して容積が減るときは、ポンプ室２８は増圧されて弁体３１は蓋体２０に密着して閉じ、反対に弁体部１８はこのポンプ室２８の溝部３０を塞いでいる部分が開いてポンプ室２８の空気は溝部３０、共通室２９を通って排気孔２５から排出される。
【０００９】
この小型ポンプは、三つのダイヤフラム部が一定の位相差をもって夫々上記の運動を繰り返すことにより夫々別々の吸気孔２３より空気を吸入し、共通の弁室２９を通り排出口２５より排出され、これによりポンプ作用をする。
【００１０】
【発明が解決しようとする課題】
以上述べた小型ポンプの弁体部１８は、構造上この弁体部１８を拡大して示した図１８（Ａ）における矢印ａ方向へ倒れる変形は比較的容易であるがその逆方向である矢印ｂ方向へは変形しにくく、矢印ａ方向へ倒れた状態では、矢印ｂ方向への力は弱い。
【００１１】
このような理由から、ポンプ作用が行なわれた時、ダイヤフラム部の容積の縮小によりポンプ室から気体が供給されると気体の圧力により、弁体部１８は矢印ａ方向に変形して弁が開くが、ダイヤフラム部の容積の拡大により吸引されても溝幅が狭いこともあって、矢印ｂ方向への変形は十分でない。その結果閉じるべき弁が確実に閉じずにここから空気がポンプ室方向に逆流することになり、これが空気の洩れとなる。上述のような欠点は、図１７（Ｂ）に示すようなスリットを設けて各ポンプ室に対応して各々弁を構成するようにした構造の弁体部とした場合、特に顕著になる。
【００１２】
又、ポンプ作用により一つのダイヤフラム部が空気を供給する状態から反転し又他のダイヤフラム部を空気を供給する状態になった時に前者のダイヤフラム部側の弁が完全に閉じていない場合、後者のダイヤフラム部により供給された空気の一部が洩れることにより正常な空気の供給が若干阻害されることになる。
【００１３】
又、ポンプ作用を停止した場合も、前述の矢印ａ方向に倒れた弁が完全に戻らずに弁が若干開いた状態のままとなり、供給した空気が開いた弁からポンプ室内に逆流して洩れの原因となる。
【００１４】
【課題を解決するための手段】
本発明の小型ポンプは、夫々ポンプ室を形成する少なくとも一つのダイヤフラム部とダイヤフラム部とほとんど接する位置に設けられた弁体部とを一体に形成した弾性材料よりなるダイヤフラム本体を有していて、ダイヤフラム本体がシリンダー部および吐出口へ通ずる弁室を有するバルブハウジングとにて形成されている空間内に収納され、バルブハウジングにはダイヤフラム部のポンプ室と弁室とを連通する溝を有しており、ダイヤフラム本体のバルブハウジング側とは反対側の面とシリンダー部のバルブハウジング側の面とが少なくとも弁体部において接する状態にて保持され、シリンダー部のダイヤフラム本体の弁体部において接する面内に凸部を形成したことを特徴としている。
【００１５】
このようにシリンダー部に凸部を設けることにより、この凸部がダイヤフラム本体を押圧しこれによりダイヤフラム本体の弁体部に図１に示す矢印ｂ方向への力が働くようにして、ポンプ作用停止時等には確実に弁を閉じるようにした。
【００１６】
又、本発明の小型ポンプは、シリンダー部の代わりにダイヤフラム本体のシリンダーと接する面に同様の凸部を設けたことを特徴とする。
【００１７】
これによって、シリンダー部に凸部を設けたときと同様の作用、つまりダイヤフラム本体の弁体部に矢印ｂ方向の力が働くようにした。
【００１８】
【発明の実施の形態】
本発明の小型ポンプの実施の形態について説明する。本発明の小型ポンプの基本構成は図１に示す通りで、図１１乃至１７に示す従来の小型ポンプと基本的に同じ又は類似のものであって、前述のようにシリンダー部又はダイヤフラム本体に凸部を設けたものである。
【００１９】
図１は本発明の小型ポンプの一例を示す断面図で、１はモーター、２は回転軸、３は駆動部を収納するケース、５はカラー、６は駆動軸、７は駆動体、１１はシリンダー部、１４はダイヤフラム本体、１５はダイヤフラム部、１８は弁体部、２５は吐出口、２９は弁室であり、これらは図１１に示す従来の小型ポンプと実質上同じである。又３９は蓋体、４０は、図１１における蓋体２０と類似の構造のバルブハウジングである。
【００２０】
本発明の小型ポンプは、上述の構成のポンプで、更にシリンダー部１１の複数の各シリンダーが円周上に配置されるように一体に固定する部材のバルブハウジング４０の側の面に凸部４２を有することを特徴としている。
【００２１】
図２は本発明の小型ポンプで用いられるシリンダー部１１を示す図で（Ａ）は平面図、（Ｂ）はＢ−Ｂ断面図である。この図において、４１はシリンダー、４２はシリンダー部１１のバルブハウジング側の面１１ａ上に形成した凸部である。
【００２２】
このような構成のシリンダー部１１を図１に示すように他の各部品と組み合わせ固定することにより本発明の小型ポンプが形成される。このように組み立てられた小型ポンプは図１に示すようにダイヤフラム本体１４の弁体部１８の下面（弁体部の底部外面）１８ｅを前記シリンダー部１１の凸部４２が押圧することになり、これにより弁体部１８にはその吐出口２５側が開く方向の力（円筒部分の外側への力）が常に加わることとなる。
【００２３】
これにより、小型ポンプを作動させることにより弁が開く方向である弁体部１８がその内側へ倒れた場合も、ポンプ作用が停止すれば前述の外側への力により弁は戻されて確実に閉じることになる。このような内側への倒れを元に戻す働きは、図１７（Ｂ）に示すスリットを形成した形状の弁体においても十分得られ、この形状の弁体部においても弁は確実に閉じる。したがって、ポンプ作用中の一つのダイヤフラム部の運動によるそのポンプ室の容積の縮小による空気の送り出し後、逆に容積の拡大時には、弁は確実に閉じると同時に他のダイヤフラム部による空気送り出しが行なわれ、空気の送り出しは連続して良好に行なわれ、空気洩れが生ずることがない。
【００２４】
又、ポンプ作用を停止した場合も、前述の弁体部１８の底面１８ｅを押圧することによるその先端を広げる方法への力により弁体部１８は駆動前の状態に確実に戻り、弁は完全に閉じしたがって空気洩れは生じない。
【００２５】
図３は、第１の実施の形態の他の構成の要部（シリンダー部）を示す図である。この図３も図２と同様（Ａ）はシリンダー部１１の平面図、（Ｂ）はそのＢ−Ｂ線断面図である。これら図に示すように、この実施の形態では、シリンダー部１１のバルブハウジング側の面１１ａ上で各シリンダーの周辺部近傍で特に弁体部の弁と弁の間（ここで弁体部の弁とは図１８（Ａ）の場合弁室から各ポンプ室に通ずる位置で弁としての働きをする箇所で図１２、図１７におけるバルブハウジングにおける溝３０が形成されている位置に接する箇所又図１８（Ｂ）の弁体部の場合、各弁１８ａ、１８ｂ、１８ｃをいう）に近い位置から放射状に伸びる凸部４３つまり弁体部の弁の両端付近つまり前記溝３０の両側付近よりシリンダーの周辺に沿って伸びる凸部４３を形成したもので、この実施の形態のようにポンプ室が三つの場合、隣接するシリンダー同士が共通した凸部となり、図示する構成になる。この凸部４３を設けることにより、図２に示す実施の形態と同様の力が弁体部に働き、したがって同様に停止時等に弁を完全に閉じることになる。
【００２６】
図４は、シリンダー部１１の表面１１ａに凸部４２と凸部４３の両方共設けた構成にしたもので、凸部を設けることによる効果は一層大である。
【００２７】
図５に示す第２の実施の形態は、凸部をダイヤフラム本体側に設けたものである。つまり、図５の（Ａ）はダイヤフラム本体１４の底面図で、（Ｂ）はＢ−Ｂ線断面図である。
【００２８】
図５に示すように、ダイヤフラム本体１４の弁体部１８の底部外面（底部の駆動部側の面）に凸部４４を形成したものである。
【００２９】
この実施の形態では、シリンダー部１１のバルブハウジング側の面１１ａは平面でよい。この図５のようなダイヤフラム本体を用いて図１のように小型ポンプを組み立てた時、ダイヤフラム本体１４の底面とシリンダー部１１の表面１１ａとが接し、これにより凸部４４がシリンダー部の表面１１ａにて押圧されて、図２に示すシリンダー部を用いた小型ポンプと全く同じ作用をダイヤフラム本体が受け、弁体部１８には同様の力が働き、したがって図２のものと同じ作用効果を奏することになる。
【００３０】
図６は、図５と同様にダイヤフラム本体に凸部を設けた第２の実施の形態の他の例である。これら図において、４５がダイヤフラム本体１４の底面に設けた凸部であって、各ダイヤフラム部１５の間に長い形状の凸部を設けたもので図３に示す凸部４３と同様の形状の凸部４５をダイヤフラム本体の底面（シリンダー部１１の側の面）に設けたものである。つまり、ダイヤフラム本体１４のシリンダー部１１の側の面で、弁体部１８の底部外面で前記バルブハウジングに形成された溝の両側付近からダイヤフラム部１５の外周付近に沿って伸びる凸部４５を設けたものである。これによって、図３に示す実施の形態における場合と、同様の作用効果を奏するものである。
【００３１】
図７は凸部４４と凸部４５の両方をダイヤフラム本体底部外面に設けたもので、これにより一層効果的である。
【００３２】
尚図５、図６、図７に示す構成のダイヤフラム本体は、ダイヤフラム本体と同じ材質により凸部４４、４５等を一体に成形することが望ましい。しかしダイヤフラム本体と同じ材質又は異なる材質による凸部のみを形成し、これをダイヤフラム本体底面に接着剤による接着等の手段により固定してもよい。
【００３３】
図８は、本発明で用いる凸部の各種形状を示す例で、（Ａ）は円形状、（Ｂ）は三角形（四角形等の他の多角形でもよい）、（Ｃ）はドーナツ形、（Ｄ）は長方形状、（Ｅ）は楕円形である。
【００３４】
尚、図１に示す本発明の小型ポンプは、バルブハウジング２０の更に外側に蓋体４０を取り付けた構造であるが、図１１に示す従来例のような構造の小型ポンプのシリンダー部１１やダイヤフラム本体１４に凸部を設けたものでもよい。又、図１や図９や図１１等のようなダイヤフラム本体を用いた小型ポンプ（本発明と基本構成が同じ小型ポンプ）であれば、いずれの構造のポンプでも本発明の適用は可能である。
【００３５】
以上述べた本発明の小型ポンプは、ダイヤフラム部（ポンプ室）が三つのタイプの小型ポンプであるが、ダイヤフラム部が四つ以上あるいは一つ又は二つのポンプにも本発明を適用できる。例えばダイヤフラム部が四つの場合は、ダイヤフラム部本体の中央を中心とする円の円周上に等間隔にダイヤフラム部を配置したもので、シリンダー部又はダイヤフラム部本体の中央に凸部を設けることにより本発明の目的を達成し得る。又四つのダイヤフラム部を有するタイプの小型ポンプの場合も、各ダイヤフラム部の間で、シリンダー又はダイヤフラム本体に凸部を設けたものも本発明の目的を達成し得る。更に中央およびダイヤフラム部の間の両方に凸部を設けてもよい。
【００３６】
又、二つのダイヤフラム部を有する小型ポンプの場合、ダイヤフラム本体の中心を通る直線上にこの中心から等距離の位置に夫々ダイヤフラム部が形成される。この小型ポンプの場合、両ダイヤフラム部の中心付近に凸部を設けるか、シリンダー部のバルブハウジング側の面で弁体部の弁の両端付近つまり前記溝３０の両側付近よりシリンダー周辺近傍に沿って伸びる方向あるいはダイヤフラム本体のシリンダー部の側の面で弁体部の底部外面の前記溝の両側位置付近からダイヤフラム部の周辺近傍に沿って伸びる凸部を設けることにより本発明の目的を達成し得る。
【００３７】
図９は、一つのダイヤフラム部よりなる小型ポンプに本発明を適用した実施の形態を示す図である。
【００３８】
図において、１はモータ、２はモータ１の出力軸、３はケース、５はカラー、６は駆動軸で、これらは図１に示す三つのポンプ室を有するポンプと同じである。又５０は駆動体、５１はポンプ室５４を構成するダイヤフラム部５２とダイヤフラム部５２に近接した位置に設けられた弁体部５３とを一体にしたダイヤフラム本体、５５はシリンダー部、５６は吐出口５７を有するバルブハウジングである。又５８はシリンダー部５５に設けられた凸部、５９は蓋体である。
【００３９】
この実施の形態は、一つのポンプ室を有する小型ポンプであって、一つのダイヤフラム部５２が一つのシリンダーを有するシリンダー部５５のシリンダー内に配置されるようにダイヤフラム本体５１がシリンダー部５５とバルブハウジング５６とにより保持される構成になっている。
【００４０】
このポンプにおいてモータ１の回転によりその出力軸２を回転させると、カラー５と駆動軸６により駆動体５０の図９において左側の部分が上下動してダイヤフラム部５２の容積が変化してポンプ作用を行なう。
【００４１】
この実施の形態のポンプは、図１の実施例と同様にシリンダー部５５の中央部分つまりダイヤフラム本体５１の弁体部５３と接する部分に凸部５８を有することを特徴としている。このポンプは、凸部５８を有することにより、弁体部の底面中心部分が押圧され、弁体部の先の部分が広くなる方向への力が働き、したがって図１に示す実施の形態のポンプと同様に弁の開閉が正常に行なわれ、ポンプ作動中あるいは停止時の空気洩れを防止し得る。
【００４２】
尚、凸部５８はシリンダー部ではなく、ダイヤフラム本体５１の同じ位置つまりダイヤフラム本体５１の弁体部５３の中央でシリンダー部側に設けても良い。
【００４３】
又一つのポンプ室よりなる本発明の小型ポンプの場合も、第１、第２の実施の形態の凸部に相当する位置に凸部を設けても本発明の目的を達成し得る。
【００４４】
又図１０は、本発明の小型ポンプで、一つのポンプ室を有するポンプの弁体部付近の断面図である。この小型ポンプの場合、弁体部５３は筒状とする必要はなく、弁室を構成する部分内に弁６０をダイヤフラム本体５１に一体に形成しこの弁体部の弁６０に関してダイヤフラム部５２とは反対側の箇所の外面に凸部６１を形成すればよい。尚１１はシリンダー部、２０は蓋体である。
【００４５】
又ダイヤフラム本体を設けた凸部６１の代わりに、これに対応するシリンダー側に凸部を形成し、ダイヤフラム本体５１のシリンダー側の面を平面にしてもよい。
【００４６】
以上の一つのポンプ室の場合も、ダイヤフラム本体の形状は変わるが、凸部を設ける位置は、複数のポンプ室を有するポンプと実質上同じである。したがって、本発明において弁体部の底部外面とは、図１０の凸部６１が形成された部分とその周辺部分を指すものとする。
【００４７】
以上各実施の形態において述べたように、本発明のシリンダー付近又はダイヤフラム部付近に設ける凸部はポンプ室の数に関係なく弁体部の底部外面のバルブハウジングの溝の両側付近よりシリンダーの周辺又はダイヤフラム部の周辺に沿って伸びる凸部であればよい。しかし、ポンプ室の数が３以上であれば、隣接するポンプ室が比較的接近して形成されるため、図３、図６等のように隣接する部分は共通の一つの凸部で十分目的を達成し得る。
【００４８】
【発明の効果】
本発明の小型ポンプは、従来のポンプのシリンダー部又はダイヤフラム本体に凸部を形成するという簡単な構成で、ポンプ作用時における弁の開閉および停止時における弁の閉塞を確実なものとし、良好なポンプ作用お行ない得ると共に空気洩れが解消される。
【図面の簡単な説明】
【図１】本発明の小型ポンプの断面図
【図２】本発明の第１の実施の形態の小型ポンプで用いるシリンダー部の構成を示す図
【図３】前記第１の実施の形態のシリンダー部の他の構成を示す図
【図４】前記第１の実施の形態のシリンダー部の更に他の構成を示す図
【図５】本発明の第２の実施の形態の小型ポンプにて用いるダイヤフラム本体の構成を示す図
【図６】本発明の第２の実施の形態の小ダイヤフラム本体の他の構成を示す図
【図７】本発明の第２の実施の形態の小ダイヤフラム本体の更に他の構成を示す図
【図８】本発明で用いる凸部の形状の各例を示す図
【図９】本発明の小型ポンプで、一つのポンプ室よりなる小型ポンプの構成を示す図
【図１０】本発明の一つのポンプ室のポンプのダイヤフラム本体に形成する凸部の位置等を示す図
【図１１】従来の小型ポンプの構成を示す図
【図１２】前記従来の小型ポンプの平面図
【図１３】前記従来の小型ポンプのシリンダー部の平面図
【図１４】前記従来の小型ポンプのダイヤフラム部本体の平面図
【図１５】前記従来の小型ポンプのダイヤフラム部本体の底面図
【図１６】前記従来の小型ポンプの蓋体の底面図
【図１７】前記従来の小型ポンプの弁体部を拡大して示した図
【符号の説明】
１１，５５シリンダー部
１４，５１ダイヤフラム本体
１５，５２ダイヤフラム部
１８，５３弁体部
４０，５６バルブハウジング
４１シリンダー
４２，４３，４４，４５，５９，６１凸部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a small pump provided with a diaphragm body in which a diaphragm portion forming at least one pump chamber and a valve body portion disposed in the valve chamber are integrally formed.
[0002]
[Prior art]
A conventional small pump having a diaphragm portion is as shown in FIGS. 12 to 17 when a pump having three pump chambers (diaphragm portions) is taken as an example.
[0003]
In these drawings, FIG. 12 is a plan view, and FIG. 11 is a cross-sectional view taken along line AA in FIG. 12 , where 1 is a small DC motor, 2 is an output shaft of the motor 1, and 3 is cup-shaped and has a bottom surface. A case 5 attached to the output shaft side surface of the motor 1 by a screw 4, 5 is a collar fixed to the output shaft 2, 6 is inclined at a predetermined angle with respect to the output shaft 2, and its tip is the center of the output shaft 2 A drive shaft fixed to the collar 5 so as to exist on the shaft, 7 is a drive body having three holes 8 formed in a disk shape and provided at intervals of 120 degrees, and 9 is located below the center of the drive body 7 A cylindrical support portion 10 that is integrally formed extending in the direction is a steel ball for reducing friction between the drive shaft 6 and the drive body 7. The support portion 9 is loosely fitted in the drive portion 6, and when the output shaft 2 rotates, the drive shaft 6 rotates in an inclined state. And so-called dish-rotating exercise. As shown in FIG. 13 , reference numeral 11 denotes a cylinder portion having a structure in which, for example, three holes 12 are formed in a disk-shaped member and three cylinders are fixed thereto. Three screw holes 13 are formed in the disk-shaped member. ing.
[0004]
Reference numeral 14 denotes a diaphragm body formed of a soft rubber and formed in a disk shape. FIG. 14 shows the plane and FIG. 15 shows the bottom of the diaphragm body. 15 is a three bell-shaped diaphragm part integrally formed extending downward from the main body at intervals of 120 degrees, 16 is a drive part at the center thereof, 17 is formed at the tip of the drive part 16 via a thin neck part. The head 18 is a valve body extending upward from the center of the main body. The valve body portion is formed integrally with the diaphragm body 14 has a cylindrical shape as extending upwardly from the body 14, as shown enlarged in FIG. 17 (A). Further, for reasons such as easy opening and closing of the valve, as shown in FIG. 17B , a slit 18d is formed at the boundary of each cylindrical portion, which makes the three pump chambers. In some cases, a valve body portion having a shape configured to constitute three valves of the respective valves 18a, 18b, and 18c at corresponding positions may be used. The head 17 penetrates the hole 8 of the driving body 7 and protrudes to the lower surface side of the driving body 7, whereby the driving portion 16 is held by the driving body 7. Three holes 19 for passing screws are formed in the middle of the diaphragm portions 15 of the diaphragm main body 14.
[0005]
The diaphragm main body 14 as described above is formed by integrating three diaphragm portions 15 and a valve body portion 18 and the like, and is formed of an elastic material such as rubber. In addition, although the prior art example shown in figure has three diaphragm parts, it is not restricted to three but generally one or more are provided.
[0006]
20 is a lid which also serves as a valve housing having a circular recess 21 formed three on the bottom at 120 degree intervals, showing the bottom view in FIG. 16. 22 is a hole formed in the center of the recess 21, 23 is an intake hole formed around each of the holes 22, 24 is a valve chamber part formed upward in the center of the lid 20, and 25 is This is an exhaust hole formed by narrowing the tip of the valve chamber 24. In addition, 26 shown in FIGS. 12 and 16 is a hole formed in three so as to pass a screw through the middle of each hole 22. A screw 27 passes through the hole 26 and the hole 19 and is screwed into the screw hole 13. By this screwing, the lid body 20 is fixed to the cylinder portion 11 with the diaphragm main body 14 interposed therebetween, and the three pump chambers 28 are formed by the concave portion 21 of the lid body 20 and the diaphragm portion 15. The lid 20 has a common chamber 29 formed in the valve chamber 24, and each recess 21 has a notched groove 30 formed inward (in the direction of the center of the lid) and is connected to the common chamber 29. . Accordingly, the pump chambers 28 are commonly connected to the common chamber 29 at the center. The valve body 18 is in contact with the inner peripheral surface of the valve chamber 24 and closes this communication path.
[0007]
31 is an umbrella-shaped valve body made of soft rubber, 32 is a support column that is integrally formed extending upward from the center of the valve body 31, and 33 is a thicker head formed at the tip of the support column 32. . The valve body 31 is formed in a size that sufficiently covers the intake hole 23, and is attached so that the support column 32 penetrates the hole 22 and the head 33 comes out to the outside and does not come out to the lid body 20. Yes.
[0008]
Next, the operation of the small pump configured as described above will be described. When the motor 1 is energized and the output shaft 2 is rotated, the drive shaft 6 is also rotated. As a result, the drive body 7 rotates and the drive unit 16 of each diaphragm unit 15 vibrates vertically with a phase difference of 120 degrees. . Due to the piston movement of the diaphragm portion, the volume of the pump chamber 28 changes periodically. When the drive unit 16 moves downward and the volume increases, the pump chamber 28 is depressurized and the valve body 18 closes tightly to the valve chamber 24, and conversely the valve body 31 opens and air is passed through the intake hole 23. Flows in. Next, when the drive unit 16 moves upward to reduce the volume, the pump chamber 28 is increased in pressure, and the valve body 31 closes closely to the lid body 20, and on the contrary, the valve body portion 18 closes to the pump chamber 28. A portion closing the groove portion 30 is opened, and the air in the pump chamber 28 is discharged from the exhaust hole 25 through the groove portion 30 and the common chamber 29.
[0009]
In this small pump, the three diaphragm parts repeat the above-mentioned movements with a certain phase difference, respectively, so that air is sucked in from the respective intake holes 23 and discharged from the discharge port 25 through the common valve chamber 29. Pump action.
[0010]
[Problems to be solved by the invention]
The valve body portion 18 of the small pump described above is relatively easy to deform in the direction of arrow a in FIG. 18A, which is an enlarged view of the valve body portion 18, but the arrow in the opposite direction is relatively easy. In the state where it is difficult to deform in the b direction and falls in the arrow a direction, the force in the arrow b direction is weak.
[0011]
For this reason, when the pump action is performed, if the gas is supplied from the pump chamber due to the reduction in the volume of the diaphragm portion, the valve body portion 18 is deformed in the direction of the arrow a due to the pressure of the gas and the valve is opened. However, even if it is sucked by the expansion of the volume of the diaphragm portion, the groove width is narrow, and the deformation in the direction of the arrow b is not sufficient. As a result, the valve to be closed does not close reliably, and air flows backward from here toward the pump chamber, which causes air leakage. The disadvantage as described above, when the valve body of the structure so as to constitute each valve corresponding to each pump chamber provided with a slit as shown in FIG. 17 (B), becomes particularly noticeable.
[0012]
Also, if the valve on the diaphragm side of the former is not completely closed when one diaphragm part is reversed from the state of supplying air by pumping and the state of supplying air to the other diaphragm part, the latter When a part of the air supplied by the diaphragm leaks, normal air supply is somewhat hindered.
[0013]
In addition, even when the pump action is stopped, the valve that has fallen in the direction of arrow a described above does not return completely and the valve remains slightly open, and the supplied air leaks back into the pump chamber from the opened valve. Cause.
[0014]
[Means for Solving the Problems]
The small pump of the present invention has a diaphragm body made of an elastic material integrally formed with at least one diaphragm portion that forms a pump chamber and a valve body portion provided at a position almost in contact with the diaphragm portion, The diaphragm body is housed in a space formed by a cylinder housing and a valve housing having a valve chamber communicating with the discharge port, and the valve housing has a groove for communicating the pump chamber and the valve chamber of the diaphragm portion. The surface of the diaphragm body opposite to the valve housing side and the surface of the cylinder portion on the valve housing side are held in contact with each other at least in the valve body portion, and in the surface in contact with the valve body portion of the diaphragm body in the cylinder portion It is characterized in that a convex portion is formed on.
[0015]
By providing a convex portion in the cylinder portion in this way, this convex portion presses the diaphragm main body, thereby causing a force in the direction of arrow b shown in FIG. The valve was surely closed at times.
[0016]
Further, the small pump of the present invention is characterized in that a similar convex portion is provided on the surface of the diaphragm main body in contact with the cylinder instead of the cylinder portion.
[0017]
As a result, the same action as when the convex part is provided on the cylinder part, that is, the force in the direction of the arrow b acts on the valve body part of the diaphragm body.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the small pump of the present invention will be described. The basic configuration of the small pump of the present invention is as shown in FIG. 1, which is basically the same as or similar to the conventional small pump shown in FIGS. 11 to 17 , and is convex to the cylinder or the diaphragm body as described above. A part is provided.
[0019]
FIG. 1 is a cross-sectional view showing an example of a small pump according to the present invention. 1 is a motor, 2 is a rotating shaft, 3 is a case for housing a driving unit, 5 is a collar, 6 is a driving shaft, 7 is a driving body, and 11 is a driving body. cylinder unit, 14 a diaphragm body, 15 diaphragm, 18 valve body, 25 discharge port, 29 is a valve chamber, which are substantially the same as the conventional miniature pump shown in FIG. 11. The 39 lid, 40 is a valve housing of a similar structure as the lid 20 in FIG. 11.
[0020]
The small pump of the present invention is a pump having the above-described configuration, and further, a convex portion 42 on the surface of the valve housing 40 side of a member that is fixed integrally so that a plurality of cylinders of the cylinder portion 11 are arranged on the circumference. It is characterized by having.
[0021]
2A and 2B are views showing a cylinder portion 11 used in the small pump of the present invention, wherein FIG. 2A is a plan view and FIG. 2B is a cross-sectional view taken along the line BB. In this figure, 41 is a cylinder, 42 is a convex part formed on the surface 11a of the cylinder part 11 on the valve housing side.
[0022]
The compact pump of the present invention is formed by fixing the cylinder portion 11 having such a configuration in combination with other components as shown in FIG. In the small pump assembled in this way, as shown in FIG. 1, the convex portion 42 of the cylinder portion 11 presses the lower surface 18e (the bottom outer surface of the valve body portion) 18e of the valve body portion 18 of the diaphragm body 14, As a result, a force in the direction of opening the discharge port 25 (force toward the outside of the cylindrical portion) is always applied to the valve body 18.
[0023]
As a result, even when the valve body 18 which is the direction in which the valve opens by operating the small pump falls to the inside thereof, the valve is returned and closed reliably by the outward force as described above if the pump action is stopped. It will be. Such a function of returning the inward tilt to the original state is sufficiently obtained even in the valve body having the slit shape shown in FIG. 17B , and the valve is reliably closed even in the valve body portion having this shape. Therefore, after the air is sent out by reducing the volume of the pump chamber due to the movement of one diaphragm part during pumping, the valve is securely closed and the air is sent out by the other diaphragm part when the volume is enlarged. The air is continuously sent out satisfactorily and no air leakage occurs.
[0024]
Even when the pump action is stopped, the valve body portion 18 is surely returned to the state before driving by the force to the method of expanding the tip by pressing the bottom surface 18e of the valve body portion 18 described above, and the valve is completely Therefore, air leakage does not occur.
[0025]
FIG. 3 is a diagram illustrating a main part (cylinder part) of another configuration of the first embodiment. 3A and 3B, FIG. 3A is a plan view of the cylinder portion 11, and FIG. As shown in these drawings, in this embodiment, on the surface 11a of the cylinder portion 11 on the valve housing side, in the vicinity of the periphery of each cylinder, particularly between the valves of the valve body portion (here, the valve of the valve body portion). In FIG. 18 (A), it is a location that functions as a valve at a position that leads from the valve chamber to each pump chamber, and a location that contacts the location where the groove 30 in the valve housing in FIGS. 12 and 17 is formed . In the case of the valve body part (B), the convex parts 43 extending radially from positions close to the respective valves 18a, 18b, 18c), that is , the cylinder periphery from the vicinity of both ends of the valve of the valve body part, that is, from both sides of the groove 30 In the case where there are three pump chambers as in this embodiment, the adjacent cylinders are common to each other and have the configuration shown in the figure. By providing the convex portion 43, the same force as that in the embodiment shown in FIG. 2 acts on the valve body portion, and therefore the valve is completely closed at the time of stopping or the like.
[0026]
FIG. 4 shows a configuration in which both the convex portions 42 and the convex portions 43 are provided on the surface 11a of the cylinder portion 11, and the effect obtained by providing the convex portions is even greater.
[0027]
In the second embodiment shown in FIG. 5, a convex portion is provided on the diaphragm main body side. 5A is a bottom view of the diaphragm main body 14, and FIG. 5B is a cross-sectional view taken along the line BB.
[0028]
As shown in FIG. 5, the convex part 44 is formed in the bottom part outer surface (surface of the bottom part at the drive part side) of the valve body part 18 of the diaphragm main body 14. As shown in FIG.
[0029]
In this embodiment, the surface 11a on the valve housing side of the cylinder portion 11 may be a flat surface. When assembling the miniature pump as shown in Figure 1 with the diaphragm body, such as in FIG. 5, the surface 11a of the bottom and the cylinder portion 11 of the diaphragm main body 14 is in contact, thereby the surface 11a of the protrusion 44 is a cylinder unit 2 and the diaphragm main body receives exactly the same action as the small pump using the cylinder part shown in FIG. 2, and the valve body part 18 has the same force, and thus has the same effect as that of FIG. It will be.
[0030]
FIG. 6 shows another example of the second embodiment in which a convex portion is provided on the diaphragm body as in FIG. In these figures, reference numeral 45 denotes a convex portion provided on the bottom surface of the diaphragm main body 14, and a convex portion having a long shape is provided between the diaphragm portions 15, and has a convex shape similar to the convex portion 43 shown in FIG. The portion 45 is provided on the bottom surface of the diaphragm main body (the surface on the cylinder portion 11 side). In other words, on the surface of the diaphragm body 14 on the cylinder part 11 side, the convex part 45 extending from the vicinity of both sides of the groove formed in the valve housing on the outer surface of the bottom of the valve body part 18 along the outer periphery of the diaphragm part 15 is provided. It is a thing. As a result, the same effects as those in the embodiment shown in FIG. 3 are obtained.
[0031]
In FIG. 7, both the convex portion 44 and the convex portion 45 are provided on the outer surface of the bottom of the diaphragm main body, which is more effective.
[0032]
The diaphragm main body configured as shown in FIGS. 5, 6, and 7 is desirably formed integrally with the convex portions 44, 45, etc., using the same material as the diaphragm main body. However, only a convex portion made of the same material as the diaphragm main body or a different material may be formed, and this may be fixed to the bottom surface of the diaphragm main body by means such as bonding with an adhesive.
[0033]
FIG. 8 is an example showing various shapes of convex portions used in the present invention, (A) is a circular shape, (B) is a triangle (other polygons such as a quadrangle), (C) is a donut shape, ( D) is rectangular and (E) is elliptical.
[0034]
Incidentally, a miniature pump of the present invention shown in FIG. 1 further has a structure fitted with a lid 40 on the outside, the structure miniature pump cylinder portion 11 and the diaphragm as in the conventional example shown in FIG. 11 of the valve housing 20 The main body 14 may be provided with a convex portion. Further, if the miniature pump (present invention the basic configuration is the same miniature pump) using a diaphragm body, such as FIGS. 1 and 9 and 11, it is possible applications of the invention in a pump of any structure .
[0035]
The small pump of the present invention described above is a small pump having three types of diaphragm portions (pump chambers). However, the present invention can be applied to pumps having four or more diaphragm portions or one or two diaphragm portions. For example, when there are four diaphragm parts, the diaphragm parts are arranged at equal intervals on the circumference of a circle centered on the center of the diaphragm part body. By providing a convex part at the center of the cylinder part or diaphragm part body, The object of the present invention can be achieved. Also, in the case of a small pump of the type having four diaphragm parts, a cylinder or a diaphragm body provided with a convex part between the diaphragm parts can achieve the object of the present invention. Furthermore, you may provide a convex part in both between a center and a diaphragm part.
[0036]
In the case of a small pump having two diaphragm portions, the diaphragm portions are formed at positions equidistant from the center on a straight line passing through the center of the diaphragm body. In the case of this small pump, a convex portion is provided in the vicinity of the center of both diaphragm portions, or on the valve housing side surface of the cylinder portion, near both ends of the valve of the valve body portion, that is, near both sides of the groove 30 along the vicinity of the cylinder. The object of the present invention can be achieved by providing convex portions extending in the extending direction or near the both sides of the groove on the outer surface of the bottom of the valve body portion on the cylinder portion side surface of the diaphragm body along the vicinity of the periphery of the diaphragm portion. .
[ 0037 ]
FIG. 9 is a diagram showing an embodiment in which the present invention is applied to a small pump composed of one diaphragm portion.
[ 0038 ]
In the figure, 1 is a motor, 2 is an output shaft of the motor 1, 3 is a case, 5 is a collar, and 6 is a drive shaft, which are the same as the pump having three pump chambers shown in FIG. Reference numeral 50 denotes a driving body, 51 denotes a diaphragm main body in which a diaphragm portion 52 constituting the pump chamber 54 and a valve body portion 53 provided at a position close to the diaphragm portion 52 are integrated, 55 denotes a cylinder portion, and 56 denotes a discharge port. 57 is a valve housing. Reference numeral 58 denotes a convex portion provided on the cylinder portion 55, and 59 denotes a lid.
[ 0039 ]
This embodiment is a small pump having one pump chamber, and the diaphragm main body 51 has a cylinder portion 55 and a valve so that one diaphragm portion 52 is disposed in a cylinder of a cylinder portion 55 having one cylinder. The structure is held by the housing 56.
[ 0040 ]
In this pump, when the output shaft 2 is rotated by the rotation of the motor 1, the left side portion of the driving body 50 in FIG. 9 is moved up and down by the collar 5 and the driving shaft 6 to change the volume of the diaphragm portion 52, thereby pumping. To do.
[ 0041 ]
The pump of this embodiment is characterized by having a convex portion 58 at the center portion of the cylinder portion 55, that is, the portion in contact with the valve body portion 53 of the diaphragm main body 51, as in the embodiment of FIG. Since this pump has the convex portion 58, the central portion of the bottom surface of the valve body portion is pressed, and a force in the direction in which the tip portion of the valve body portion becomes wider acts. Therefore, the pump of the embodiment shown in FIG. In the same manner as above, the valve is normally opened and closed, and air leakage during pump operation or stop can be prevented.
[ 0042 ]
The convex portion 58 may be provided not on the cylinder portion but on the cylinder portion side at the same position of the diaphragm main body 51, that is, in the center of the valve body portion 53 of the diaphragm main body 51.
[ 0043 ]
Also in the case of the small pump of the present invention comprising one pump chamber, the object of the present invention can be achieved even if a convex portion is provided at a position corresponding to the convex portion of the first and second embodiments.
[ 0044 ]
The 10 is a miniature pump of the present invention, is a cross-sectional view of the vicinity of the valve body of the pump having a single pump chamber. In the case of this small pump, the valve body 53 does not need to be cylindrical, and the valve 60 is formed integrally with the diaphragm main body 51 in the portion constituting the valve chamber, and the diaphragm 52 and the valve 60 of the valve body May be formed on the outer surface of the opposite side. In addition, 11 is a cylinder part and 20 is a cover.
[ 0045 ]
Further, instead of the convex portion 61 provided with the diaphragm main body, a convex portion may be formed on the corresponding cylinder side, and the cylinder side surface of the diaphragm main body 51 may be flat.
[ 0046 ]
In the case of the one pump chamber described above, the shape of the diaphragm main body is changed, but the position where the convex portion is provided is substantially the same as that of the pump having a plurality of pump chambers. Therefore, in the present invention, the bottom outer surface of the valve body portion refers to a portion where the convex portion 61 of FIG. 10 is formed and its peripheral portion.
[ 0047 ]
As described above in each of the embodiments, the convex portion provided near the cylinder or the diaphragm portion of the present invention is not limited to the number of pump chambers, but the peripheral portion of the cylinder is closer to both sides of the groove of the valve housing on the bottom outer surface of the valve body portion. Or what is necessary is just the convex part extended along the periphery of a diaphragm part. However, if the number of pump chambers is 3 or more, the adjacent pump chambers are formed relatively close to each other, so that the adjacent portions as shown in FIGS. Can be achieved.
[ 0048 ]
【The invention's effect】
The small pump of the present invention has a simple configuration in which a convex portion is formed on a cylinder portion or a diaphragm body of a conventional pump, and ensures the opening and closing of the valve at the time of pump operation and the closing of the valve at the time of stoppage. Pumping can be performed and air leakage is eliminated.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a small pump according to the present invention. FIG. 2 is a diagram showing a configuration of a cylinder portion used in a small pump according to a first embodiment of the present invention. FIG. 4 is a diagram showing still another configuration of the cylinder portion of the first embodiment. FIG. 5 is a diaphragm used in the small pump of the second embodiment of the present invention. FIG. 6 is a diagram showing another configuration of the small diaphragm main body according to the second embodiment of the present invention. FIG. 7 is still another configuration of the small diaphragm main body according to the second embodiment of the present invention. in the diagram illustrating the configuration Figure 9 showing respective examples of a shape of the convex portion to be used in the present invention; FIG miniature pump of the present invention, FIG. FIG. 10 showing a miniature pump arrangement consisting of one pump chamber Convex part formed on the diaphragm body of the pump of one pump chamber of the present invention Figure 11 is a plan view and FIG. 13 is a plan view of the cylinder portion of the conventional miniature pump diagram showing a configuration of a conventional miniature pump [12] The conventional miniature pump showing the position, etc. Figure 14 The plan view of a diaphragm body of the conventional miniature pump [15] the bottom view Figure 17 of a conventional diaphragm portion bottom view of the body of the miniature pump [16] the lid of the conventional miniature pump the conventional compact Enlarged view of the pump body [Explanation of symbols]
11,55 cylinder part
14,51 Diaphragm body
15,52 Diaphragm part
18, 53 Valve body
40, 56 Valve housing
41 cylinders
42, 43, 44, 45, 59, 61 Convex

Claims

A diaphragm main body integrally formed with at least one diaphragm part forming a pump chamber and a valve body part having at least one valve disposed in proximity to the diaphragm part, and at least one where the diaphragm part is located. A cylinder portion having two cylinders, a valve housing or a passage communicating with a discharge port, and a valve housing having a groove communicating with the pump chamber and the valve chamber, and the diaphragm main body has a diaphragm portion in the cylinder of the cylinder portion A pump that is housed in the cylinder portion and the valve housing so that the valve body portion is disposed in the valve chamber of the valve housing, and that performs a pumping action by changing the volume of the diaphragm portion, at least of the diaphragm body. Arrange so that the valve body and the wall of the valve chamber of the valve housing are in contact. Is a small pump that is characterized by providing at least the Dayafuramu and the outer bottom surface of the valve body of the main body and the cylinder portion is in contact, the convex portion surface in contact with the outer bottom surface of the cylinder portion.

The cylinder portion is in contact with the diaphragm main body at least in the peripheral portion of the cylinder, and the portion in contact with the diaphragm main body is located along the vicinity of the cylinder from the vicinity of both sides of the groove formed in the valve housing in the valve body portion. The small-sized pump according to claim 1, further comprising a protruding portion extending.

A diaphragm main body integrally formed with at least one diaphragm part forming a pump chamber and a valve body part having at least one valve disposed in proximity to the diaphragm part, and at least one where the diaphragm part is located. A cylinder portion having two cylinders, a valve housing or a passage communicating with a discharge port, and a valve housing having a groove communicating with the pump chamber and the valve chamber, and the diaphragm main body has a diaphragm portion in the cylinder of the cylinder portion And a pump that is housed in the cylinder portion and the valve housing so that the valve body portion is disposed in the valve chamber of the valve housing, and performs a pumping action by changing the volume of the diaphragm portion. In contact with the diaphragm main body at least in the peripheral part Characterized by providing the cylinder periphery in the vicinity along the respective extending protrusions from both end positions near the outer bottom surface portion that contacts with the groove formed in the valve housing of the valve body portion to a portion in contact with the diaphragm body Small pump.

A diaphragm main body integrally formed with at least one diaphragm part forming a pump chamber and a valve body part having at least one valve disposed in proximity to the diaphragm part, and at least one where the diaphragm part is located. A cylinder portion having two cylinders, a valve housing or a passage communicating with a discharge port, and a valve housing having a groove communicating with the pump chamber and the valve chamber, and the diaphragm main body has a diaphragm portion in the cylinder of the cylinder portion And a pump that is housed in the cylinder portion and the valve housing so that the valve body portion is disposed in the valve chamber of the valve housing, and performs a pumping action by changing the volume of the diaphragm portion, at least of the diaphragm main body. The bottom outer surface of the valve body is in contact with the cylinder, and the die Miniature pump characterized in that a protrusion on the bottom exterior surface of the valve body of Fulham body.

The diaphragm main body is in contact with the cylinder portion at least in the peripheral portion of the diaphragm portion, and on the outer surface of the bottom portion of the valve body portion of the diaphragm main body, from the vicinity of both sides of the groove formed in the valve housing to the vicinity of the periphery of the diaphragm portion. 5. The small pump according to claim 4, further comprising a convex portion extending along each of the two .

A diaphragm main body integrally formed with at least one diaphragm part forming a pump chamber and a valve body part having at least one valve disposed in proximity to the diaphragm part, and at least one where the diaphragm part is located. A cylinder portion having two cylinders, a valve chamber or passage communicating with a discharge port, and a valve housing having a groove communicating with the pump chamber and the valve chamber formed in the diaphragm portion, and the diaphragm main body is A pump which is housed in the cylinder part and the valve housing so that the diaphragm part is disposed in the cylinder of the cylinder part and the valve body part is disposed in the valve chamber of the valve housing, and performs a pumping action by changing the volume of the diaphragm part. The diaphragm body is at least a peripheral portion of the diaphragm portion The cylinder portion and in contact, characterized in that a convex portion extending along the periphery near the diaphragm portion from both sides near the bottom outer surface in the formed in the valve housing groove of the valve body portion of the diaphragm body at A small pump.