【０００１】
【発明の属する技術分野】
本発明は液体噴出ポンプに関する。
【０００２】
【従来の技術】
液体噴出ポンプとして、例えば、装着する容器体内に下端を垂下させた状態で固定させたシリンダと、該シリンダ上端開口部より上下動可能に突出させたステムの上端部に噴出ヘッドを嵌着固定するとともに、ステム下部に連係させた環状ピストン外周縁をシリンダ内面に摺動可能に嵌合させた作動部材とを備え、該作動部材の上下動により容器体内の液を吸い上げてヘッドの噴出口より噴出する如く構成してなるものが知られている。
【０００３】
【発明が解決しようとする課題】
従来のこの種のポンプに於ける作動部材の復帰機構、即ち、作動部材を押し下げた際に元の上昇位置に復帰する復帰機構として一般に金属製のコイルスプリングを使用している。
【０００４】
作動部材の復帰機構に上記金属製のコイルスプリングを採用しているものでは、良好な復帰機能を発揮してポンプの良好な液注出機能を発揮できるものではあるが、近年の廃棄物処理事情では、金属とプラスチックの分別処理が要望され、従来のものでは、これらコイルスプリングが一般に微細であること、内部に密閉れていること等の理由によりこの分別が極めて困難であった。また、組み立てに際しても、これらコイルスプリングは微細のため取り扱いが不便であった。
【０００５】
本発明は上記した点に鑑みなされたもので、金属製のコイルスプリングを使用せずに全体を分別処理の必要のない合成樹脂等により形成できるとともに、優れた作動部材の復帰能力を備え、しかも使用前の運搬，保管時に作動部材を押し下げ係止した状態て安定的に維持することができ、長期の保管にもポンプ機能を損なう等の虞がなく、構造が簡単な液体噴出ポンプを提案するものである。
【０００６】
【課題を解決するための手段】
本請求項１発明のポンプは上記課題を解決するため、容器体２の口頚部３外周に嵌合させた装着筒４により容器体内に下部を垂下させた状態で固定させるシリンダ５と、該シリンダ上端中央の開口より上下動可能に突出させたステム６の上端部に噴出ヘッド７を嵌着固定するとともに、ステム外周下部に連係させた環状ピストン８の外周縁部をシリンダ５内面に摺動可能に嵌合させ、且つ、押し下げ状態で係止可能に構成してなる作動部材９とを備え、作動部材の上下動により容器体内の液を吸い上げてヘッドの噴出口ａより噴出する如く構成した液体噴出ポンプに於いて、シリンダ内中央に下端開口の筒状部25を支持固定するとともに、筒状部内周に外周縁を上下摺動可能に密嵌させた可動シール部26を設けてその上方の筒状部内を空気室Ｒに形成し、作動部材９と可動シール部26とを連動させるとともに、作動部材の押し下げにより拡張した空気室Ｒの負圧による可動シール部26の復帰に伴って作動部材９が復帰する如く構成し、筒状部25上端部に空気室内の空気を外部へ一方的に排出する排気弁37を設けたことを特徴とする液体噴出ポンプとして構成した。
【０００７】
また、請求項２発明のポンプは、上記排気弁37が、筒状部25上端部に形成した縮径部25a に穿設した排気孔38と、縮径部25a 外周に密嵌させた柔軟で弾力性に富む材質で形成された環状弁体39とで構成してなる排気弁37である請求項１記載の液体噴出ポンプとして構成した。
【０００８】
【発明の実施の形態】
以下、本発明の実施例の形態を図面を参照して説明する。
本発明の液体噴出ポンプ１は、容器体２の口頚部３外周に嵌合させる装着筒４により容器体内に下部を垂下させた状態で固定させたシリンダ５と、該シリンダ上端中央の開口より上下動可能に突出させたステム６の上端部に噴出ヘッド７を嵌着固定するとともに、ステム外周下部に連係させた環状ピストン８の外周縁部をシリンダ５内面に摺動可能に嵌合させ、且つ、押し下げ状態で係止可能に構成してなる作動部材９とを備えている。
図示例に於いて装着筒４は、口頚部３外周に嵌合させる周壁上端縁よりフランジを内方へ延設して構成している。
【０００９】
シリンダ５は、上部外面よりフランジを突設し、該フランジをパッキン10を介して容器体口頚部３上面に当接させるとともに、その上面を装着筒４のフランジにより押圧係止させている。また、下面より縮径したパイプ嵌合筒11を垂設しており、このパイプ嵌合筒内に上端を嵌着したパイプ12を容器体内下部に垂下させる。
【００１０】
シリンダの内面上端部には補助キャップ13を嵌着させており、該キャップは、シリンダ５上端外周に嵌合させた外嵌合筒と、シリンダ上端内周に嵌合させた内嵌合筒とを、ドーナツ板状の頂板下面周縁部より垂設し、また、頂板内周縁部より、ステム６を挿通する案内筒を垂設している。更に、外嵌合筒外周には、噴出ヘッド７を係止するための係止突条14を周設している。
【００１１】
ステム６は、シリンダ内と連通してその中の液をその上方の噴出ヘッド７に導入する導管で、外周下端部より突設した環状ピストン８をシリンダ５内周面に液密摺動可能に嵌合させており、この環状ピストン８内面とステム６下面とで形成する下向き段部を設けている。
【００１２】
噴出ヘッド７は、ステム６の外周上端部に内周下端部を嵌着固定した縦筒15を頂壁16裏面中央部より垂設するとともに、頂壁周縁部より周壁17を垂設し、また、縦筒15上端に基端を開口するとともに、周壁17を貫通して前方へ突出するノズル18を設けている。更に、周壁17内周下部には、押し下げ状態で補助キャップ13の係止突条14と係合する係合突条19を突周設しており、これらの係合により作動部材９を押し下げ状態で係止可能に構成している。
【００１３】
また、シリンダ５内下端部には吸い込み弁20を、ステム６内には吐出弁21を、それぞれ設け、作動部材の上下動により容器体内の液を吸い上げてヘッドの噴出口ａより噴出する如く構成した公知のポンプ機構を備えたものである。図示例の吸い込み弁20は、シリンダ５内周下端部に嵌合させた環状枠22内面より、周方向複数の弾性棒状片23を突設し、この棒状片を介して中央に支持した弁板24によりシリンダ下端の弁孔を圧接閉塞している。
本発明では、この種のポンプに於いて、押し下げた作動部材９の復帰機構として、筒状部25と、作動部材９と連動する可動シール部26とを設けている。
【００１４】
筒状部25は、シリンダ内中央に支持固定した下端面開口の筒状をなし、また、その固定支持は、シリンダ５下端よりシリンダ内へ導入される液を筒状部25周囲から上方へ通過可能な状態に固定支持すれば良く、図示例では、上端部を縮径させた下端開口の円筒状をなす筒状部25を設けており、その下面より下方へ一体に且つ液の流通が可能に延設した脚27によりシリンダ５中央部に固定支持している。脚27は、筒状部25と同径の筒部下端縁より外方へフランジを延設するとともに、筒部を縦断してフランジ縁部まで延びるＬ字状の切欠き部27a を周後方複数穿設して構成している。そして、フランジ外周縁部をシリンダ内周下端部に嵌合し、シリンダ内周面に周方向複数突設した係止突起28下面に乗り越え係合させて固定している。
【００１５】
可動シール部26は、筒状部25内周に外周縁を上下摺動可能に密嵌させ、その上方の筒状部内を空気室Ｒに形成している。
また、作動部材９と可動シール部26との連動は、シリンダ５下端よりシリンダ内へ導入される液を筒状部周囲から上方ステム内へ通過可能な状態に連動させれば良く、図示例では、特殊構成の連結部材29により連動させている。
【００１６】
図示例の連結部材29は、可動シール部26下面に穿設した嵌合孔30内に嵌合させた係合突起31を、嵌合筒内外を上下動する十字板状部32の上端中央より立設し、十字板状部32の外面下端よりそれぞれ突設した棒状突起33を各脚27間の隙間を介して突設した第１連結部材29a と、各棒状突起33外縁部に下端部を固定させて上方へ立設するとともに、その上端部外周を作動部材９の環状ピストン８内周下部に嵌合させた第２連結部材29b とで構成している。環状ピストン８内周面に周設した係合凹溝34に、第２連結部材29b の外周上部に突周設した係合凸条35を嵌合させて、両者を確実に固定する如く構成している。更に、第２連結部材29b 上部には液の流通が可能に窓孔36を穿設している。
【００１７】
そして、作動部材９を押し下げることにより、それと連動する可動シール部26を下降させて空気室Ｒを拡張し、作動部材９の押圧を解除すれば、拡張した空気室Ｒの負圧による可動シール部26の復帰に伴って作動部材９を復帰させる如く構成している。
【００１８】
上記空気室Ｒの可動シール部26変移前の大きさ、或いは変移後の大きさ等は、ポンプ全体の大きさや収納液の粘度等の種々の条件により適宜選択すると良い。因みに、可動シール部26変移前の空気室Ｒの大きさが大きければ作動部材９の可動を行い易く、反面復帰力は小さくなると思われる。
本発明ではまた、筒状部25上端部に空気室内の空気を外部へ一方的に排出する排気弁37を設けている。この排気弁37を設けることにより、作動部材９を押し下げ係止した状態での保管，運搬等の際に、空気室Ｒ内に空気を充満させた状態で行え、また、使用の際には作動部材の係止を外して引き上げることにより、空気室内の不必要な空気を排出できる如く構成している。
【００１９】
図示例に於いては、筒状部25上端の縮径部25a に穿設した排気孔38と、縮径部25a 外周に嵌合させた、エラストマー等の柔軟で弾力性に飛んだ材質で形成された環状弁体39とで排気弁37を構成している。
【００２０】
上記の如く構成したポンプを使用する場合に付いて説明すると、図１の状態からヘッド７の係合を外して筒状部25の縮径部25a 下端縁に位置するフランジ下面に可動シール部26の上面周縁部が当接する状態まで、作動部材９を引き上げる。この際、空気室Ｒ内に充満している不必要な空気は排気孔38より環状弁体39を開いて空気室外部へ排出される。次いで、図２に示す如く、それ以上の作動部材の上昇が行えない状態から作動部材９を押し下げると可動シール部26が下降して空気室Ｒが拡張し、作動部材の押圧を解除すれば、拡張した空気室Ｒの負圧により可動シール部26が上昇し、それに伴って作動部材が上昇する。
作動部材の上下動により、容器体内の液をシリンダ５内に吸い上げ、ステム６を介して噴出ヘッド７の噴出口ａより噴出する。
尚、上記各部材は特に断りのない限り合成樹脂により形成すると良い。
【００２１】
【発明の効果】
以上説明した如く、本発明液体噴出ポンプは、既述構成としたことにより、従来のこの種のポンプの如く金属製のコイルスプリングを使用しないで作動部材の上方復帰を行えるものであり、合成樹脂或いは全体をエラストマー等の分別処理の必要のない材質により形成することができ、しかも、作動部材の復帰能力にも優れて円滑なポンプ機能を発揮できるものである。
【００２２】
また、空気室内に空気が充満した状態で作動部材を押し下げ係止させておくことができるため、運搬，保管を行う際に常時作動部材を上方へ引き上げる力が働くことがなく、外力により係止が外れて作動部材が上昇し、液漏れを生じる等の虞もなく、また、長期の保管中に負圧化状態で保持される空気室内に空気が侵入して作動部材の復帰能力を著しく損なう等の不都合を生じることもない。
また、排気弁の存在で、可動シール部を装着する際に空気室内の余分な空気を抜く必要もなく、可動シール部を簡単に装着することができる利点がある。
【００２３】
また、請求項２発明のポンプでは、極めて簡単な構造で排気弁を形成でき、製造，組み立てを容易に行える利点を兼ね備えている。
【図面の簡単な説明】
【図１】本発明の一実施例を示す半断面図である。
【図２】同実施例の作動部材の上昇した状態を示す半断面図である。
【図３】同実施例の作動部材を押し下げた状態を示す半断面図である。
【符号の説明】
２…容器体，３…口頚部，４…装着筒，５…シリンダ，６…ステム，
７…噴出ヘッド，８…環状ピストン，９…作動部材，25…筒状部，
25a …縮径部，26…可動シール部，37…排気弁，38…排気孔，39…環状弁体，
Ｒ…空気室，ａ…噴出口[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid jet pump.
[0002]
[Prior art]
As a liquid jet pump, for example, a jet head is fitted and fixed to a cylinder fixed in a state where the lower end is suspended in a container body to be mounted, and an upper end portion of a stem that is protruded up and down from the upper end opening of the cylinder. And an operating member in which the outer peripheral edge of the annular piston linked to the lower part of the stem is slidably fitted to the inner surface of the cylinder. The vertical movement of the operating member sucks up the liquid in the container and ejects it from the outlet of the head. What is configured as such is known.
[0003]
[Problems to be solved by the invention]
Generally, a metal coil spring is used as a return mechanism for the actuating member in this type of conventional pump, that is, a return mechanism that returns to the original raised position when the actuating member is pushed down.
[0004]
If the metal coil spring is used for the return mechanism of the actuating member, it will be able to demonstrate a good return function and a good pumping function of the pump. However, separation of metal and plastic is required, and in the conventional one, this separation is extremely difficult because the coil springs are generally fine and sealed inside. Also, when assembling, these coil springs are fine and inconvenient to handle.
[0005]
The present invention has been made in view of the above points, and can be formed entirely of a synthetic resin or the like that does not require a separation treatment without using a metal coil spring, and has an excellent return capability of the operating member, Proposes a liquid jet pump with a simple structure that can be stably maintained in a state where the operating member is pushed down and locked during transport and storage before use, and there is no risk of impairing the pump function even for long-term storage. Is.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the pump according to the first aspect of the present invention fixes the cylinder 5 in a state where the lower portion is suspended in the container body by the mounting cylinder 4 fitted to the outer periphery of the mouth neck portion 3 of the container body 2, and the cylinder The ejection head 7 is fitted and fixed to the upper end portion of the stem 6 that protrudes upward and downward from the opening at the center of the upper end, and the outer peripheral edge portion of the annular piston 8 linked to the lower outer periphery of the stem can slide on the inner surface of the cylinder 5. And an actuating member 9 configured to be able to be locked in a depressed state, and configured to suck up the liquid in the container body by the up and down movement of the actuating member and eject it from the jet outlet a of the head. In the ejection pump, a cylindrical portion 25 having a lower end opening is supported and fixed in the center of the cylinder, and a movable seal portion 26 is provided on the inner periphery of the cylindrical portion so that the outer peripheral edge is closely fitted to be vertically slidable. Air chamber R in the cylindrical part The actuating member 9 and the movable seal portion 26 are interlocked with each other, and the actuating member 9 is restored as the movable seal portion 26 is restored by the negative pressure of the air chamber R expanded by pushing down the actuating member. The liquid jet pump is characterized in that an exhaust valve 37 for unilaterally discharging the air in the air chamber to the outside is provided at the upper end of the cylindrical portion 25.
[0007]
In the pump according to the second aspect of the present invention, the exhaust valve 37 is a flexible and tightly fitted exhaust hole 38 formed in the reduced diameter portion 25a formed in the upper end portion of the cylindrical portion 25 and the outer periphery of the reduced diameter portion 25a. The liquid ejection pump according to claim 1, wherein the liquid ejection pump is an exhaust valve 37 comprising an annular valve body 39 formed of a material having high elasticity.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The liquid jet pump 1 according to the present invention includes a cylinder 5 fixed in a state where a lower part is suspended in a container body by a mounting cylinder 4 fitted to the outer periphery of the mouth neck portion 3 of the container body 2, and an upper and lower sides of the opening at the center of the upper end of the cylinder The ejection head 7 is fitted and fixed to the upper end of the stem 6 that is movably protruded, and the outer peripheral edge of the annular piston 8 linked to the lower portion of the outer periphery of the stem is slidably fitted to the inner surface of the cylinder 5; And an actuating member 9 configured to be able to be locked in a depressed state.
In the illustrated example, the mounting cylinder 4 is configured such that a flange extends inwardly from the upper edge of the peripheral wall to be fitted to the outer periphery of the neck 3.
[0009]
The cylinder 5 is provided with a flange projecting from the upper outer surface thereof, and the flange is brought into contact with the upper surface of the container body neck portion 3 through the packing 10, and the upper surface thereof is pressed and locked by the flange of the mounting cylinder 4. Further, a pipe fitting cylinder 11 having a diameter reduced from the lower surface is suspended, and the pipe 12 having the upper end fitted in the pipe fitting cylinder is suspended at the lower part of the container body.
[0010]
An auxiliary cap 13 is fitted to the upper end of the inner surface of the cylinder, and the cap includes an outer fitting cylinder fitted to the outer periphery of the upper end of the cylinder 5 and an inner fitting cylinder fitted to the inner periphery of the upper end of the cylinder. Is suspended from the peripheral edge of the bottom surface of the donut plate-like top plate, and a guide tube through which the stem 6 is inserted is suspended from the peripheral edge of the top plate. Furthermore, a locking protrusion 14 for locking the ejection head 7 is provided around the outer fitting cylinder.
[0011]
The stem 6 is a conduit that communicates with the inside of the cylinder and introduces the liquid therein to the ejection head 7 above, and an annular piston 8 that protrudes from the lower end of the outer periphery is slidable on the inner peripheral surface of the cylinder 5. A downward stepped portion formed by the inner surface of the annular piston 8 and the lower surface of the stem 6 is provided.
[0012]
The ejection head 7 has a vertical cylinder 15 having an inner peripheral lower end fitted and fixed to the outer peripheral upper end of the stem 6 suspended from the center of the rear surface of the top wall 16 and a peripheral wall 17 suspended from the peripheral edge of the top wall. In addition, a base end is opened at the upper end of the vertical cylinder 15, and a nozzle 18 that penetrates the peripheral wall 17 and protrudes forward is provided. Further, an engaging ridge 19 that engages with the locking ridge 14 of the auxiliary cap 13 in a depressed state is provided on the lower portion of the inner periphery of the peripheral wall 17 so that the operating member 9 is in a depressed state due to these engagements. It can be locked with.
[0013]
Further, a suction valve 20 is provided at the lower end of the cylinder 5 and a discharge valve 21 is provided in the stem 6 so that the liquid in the container is sucked up and ejected from the jet outlet a of the head by the vertical movement of the operating member. The known pump mechanism is provided. In the illustrated example, the suction valve 20 has a plurality of elastic rod-like pieces 23 in the circumferential direction protruding from the inner surface of the annular frame 22 fitted to the inner peripheral lower end portion of the cylinder 5 and is a valve plate supported in the center via the rod-like pieces. 24, the valve hole at the bottom of the cylinder is pressed and closed.
In the present invention, in this type of pump, a cylindrical portion 25 and a movable seal portion 26 interlocking with the operating member 9 are provided as a return mechanism of the pressed down operating member 9.
[0014]
The cylindrical portion 25 has a cylindrical shape with an opening at the lower end surface supported and fixed in the center of the cylinder, and the fixed support allows liquid introduced into the cylinder from the lower end of the cylinder 5 to pass upward from the periphery of the cylindrical portion 25. In the example shown in the figure, a cylindrical part 25 having a cylindrical shape with a lower end opening with a reduced diameter is provided. It is fixedly supported at the center of the cylinder 5 by a leg 27 extending to the center. The leg 27 has a flange extending outwardly from the lower end edge of the cylindrical portion having the same diameter as that of the cylindrical portion 25, and a plurality of L-shaped notches 27a extending longitudinally through the cylindrical portion to the flange edge. It is formed by drilling. Then, the outer peripheral edge of the flange is fitted to the lower end of the inner periphery of the cylinder, and is fixed to the lower surface of the locking protrusion 28 provided on the inner peripheral surface of the cylinder.
[0015]
The movable seal portion 26 has an outer peripheral edge closely fitted to the inner periphery of the tubular portion 25 so as to be slidable in the vertical direction, and the inside of the tubular portion is formed in the air chamber R.
Further, the operation member 9 and the movable seal portion 26 can be interlocked so that the liquid introduced into the cylinder from the lower end of the cylinder 5 can be interlocked with the state in which the liquid can pass from the periphery of the cylindrical portion into the upper stem. These are linked by a specially configured connecting member 29.
[0016]
The connecting member 29 in the illustrated example has an engaging protrusion 31 fitted in a fitting hole 30 formed in the lower surface of the movable seal portion 26, from the center of the upper end of the cross plate-like portion 32 that moves up and down in and out of the fitting cylinder. A first connecting member 29a which is erected and protrudes from the lower end of the outer surface of the cross-shaped plate portion 32 through the gaps between the legs 27, and a lower end portion at the outer edge of each rod-shaped projection 33. The outer periphery of the upper end portion is constituted by a second connecting member 29b fitted to the inner peripheral lower portion of the annular piston 8 of the actuating member 9 while being fixedly erected upward. The engaging groove 34 provided on the outer periphery of the second connecting member 29b is fitted into the engaging groove 34 provided on the inner peripheral surface of the annular piston 8 so that both are securely fixed. ing. Further, a window hole 36 is formed in the upper part of the second connecting member 29b so that the liquid can flow.
[0017]
Then, by depressing the actuating member 9, the movable seal portion 26 interlocked therewith is lowered to expand the air chamber R, and the release of the actuating member 9 releases the movable seal portion due to the negative pressure of the expanded air chamber R. The operation member 9 is configured to return with the return of 26.
[0018]
The size of the air chamber R before the movable seal portion 26 is changed or the size after the change may be appropriately selected according to various conditions such as the overall size of the pump and the viscosity of the stored liquid. Incidentally, if the size of the air chamber R before the movement of the movable seal portion 26 is large, the operation member 9 can be easily moved, and on the other hand, the return force is considered to be small.
In the present invention, an exhaust valve 37 for unilaterally discharging the air in the air chamber to the outside is provided at the upper end of the cylindrical portion 25. By providing this exhaust valve 37, the air chamber R can be filled with air during storage, transportation, etc. with the operating member 9 pushed down and locked. It is configured so that unnecessary air in the air chamber can be discharged by releasing the member and pulling it up.
[0019]
In the illustrated example, the exhaust hole 38 formed in the reduced diameter portion 25a at the upper end of the cylindrical portion 25 and a flexible and elastic material such as an elastomer fitted on the outer periphery of the reduced diameter portion 25a are formed. An exhaust valve 37 is constituted by the annular valve body 39 thus formed.
[0020]
When the pump configured as described above is used, the engagement of the head 7 is disengaged from the state shown in FIG. 1, and the movable seal portion 26 is provided on the lower surface of the flange located at the lower end edge of the reduced diameter portion 25a of the cylindrical portion 25. The actuating member 9 is pulled up to a state where the upper peripheral edge of the upper surface of the upper surface is in contact. At this time, unnecessary air filled in the air chamber R opens the annular valve body 39 from the exhaust hole 38 and is discharged outside the air chamber. Next, as shown in FIG. 2, when the operating member 9 is pushed down from a state where the operating member cannot be further raised, the movable seal portion 26 is lowered and the air chamber R is expanded, and the pressing of the operating member is released. Due to the negative pressure of the expanded air chamber R, the movable seal portion 26 is raised, and the operating member is raised accordingly.
By the vertical movement of the operating member, the liquid in the container body is sucked into the cylinder 5 and ejected from the ejection port a of the ejection head 7 through the stem 6.
The above members are preferably made of synthetic resin unless otherwise specified.
[0021]
【The invention's effect】
As described above, the liquid jet pump according to the present invention is configured as described above, so that the operating member can be returned upward without using a metal coil spring as in this type of conventional pump. Alternatively, the whole can be formed of a material that does not require a separation process such as an elastomer, and the pumping function is excellent with excellent return capability of the operating member.
[0022]
In addition, the operating member can be pushed down and locked in a state where the air chamber is filled with air, so there is no force to pull the operating member upward during transportation and storage, and it is locked by external force. The operating member rises and the liquid leaks, and there is no risk of liquid leakage. In addition, air enters the air chamber that is held in a negative pressure state during long-term storage, which significantly impairs the return ability of the operating member. And so on.
In addition, the presence of the exhaust valve has an advantage that the movable seal portion can be easily mounted without the need to remove excess air from the air chamber when the movable seal portion is mounted.
[0023]
In the pump according to the second aspect of the present invention, the exhaust valve can be formed with an extremely simple structure, and the manufacturing and assembly can be easily performed.
[Brief description of the drawings]
FIG. 1 is a half sectional view showing an embodiment of the present invention.
FIG. 2 is a half sectional view showing a raised state of the operating member of the embodiment.
FIG. 3 is a half sectional view showing a state in which the operating member of the embodiment is pushed down;
[Explanation of symbols]
2 ... container body, 3 ... mouth neck, 4 ... mounting cylinder, 5 ... cylinder, 6 ... stem,
7 ... ejecting head, 8 ... annular piston, 9 ... actuating member, 25 ... cylindrical part,
25a ... reduced diameter part, 26 ... movable seal part, 37 ... exhaust valve, 38 ... exhaust hole, 39 ... annular valve body,
R ... Air chamber, a ... Jump
