JP2024079387A

JP2024079387A - Discharger

Info

Publication number: JP2024079387A
Application number: JP2022192302A
Authority: JP
Inventors: 優太小賀坂
Original assignee: Yoshino Kogyosho Co Ltd
Current assignee: Yoshino Kogyosho Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2024-06-11

Abstract

【課題】大きな吐出量を実現し易い蓄圧式の吐出器を提供する。【解決手段】外部からの操作により、第２シリンダ４に対して第１ピストン３、第１シリンダ２及び第２ピストン５を伴って進退し、第２シリンダ４に対する進退動作中に、第１シリンダ２に対して第１ピストン３を伴って進退する保持部材６と、保持部材６の進退により、第１シリンダ２、第１ピストン３、第２シリンダ４及び第２ピストン５によって区画されるポンプ室７ａを介して流体を吐出する内部流路７と、ポンプ室７ａの内部圧力を増加させる保持部材６の前進により、第２ピストン５の前進終了よりも前に、第１ピストン３を、第１シリンダ２の前進規制部２ａに接触させることで、第１ピストン３を内部流路７を閉塞する閉塞形状から内部流路７を開放する開放形状まで弾性変形させる蓄圧部８とを有する、吐出器１。【選択図】図１[Problem] To provide a pressure accumulation type dispenser that can easily achieve a large discharge amount. [Solution] A dispenser 1 having a holding member 6 that advances and retreats with a first piston 3, a first cylinder 2, and a second piston 5 relative to a second cylinder 4 by external operation, and advances and retreats with the first piston 3 relative to the first cylinder 2 during the advance and retreat of the second cylinder 4, an internal flow path 7 that discharges a fluid through a pump chamber 7a partitioned by the first cylinder 2, the first piston 3, the second cylinder 4, and the second piston 5 by the advance and retreat of the holding member 6, and a pressure accumulation section 8 that elastically deforms the first piston 3 from a closed shape that closes the internal flow path 7 to an open shape that opens the internal flow path 7 by bringing the first piston 3 into contact with an advance restriction section 2a of the first cylinder 2 before the end of the advance of the second piston 5 by the advance of the holding member 6 that increases the internal pressure of the pump chamber 7a. [Selected Figure] Figure 1

Description

本発明は吐出器に関する。 The present invention relates to an ejector.

シリンダと、シリンダ上を摺動するピストンと、外部からの操作により、シリンダに対してピストンを伴って進退する保持部材と、保持部材の進退により、シリンダとピストンによって区画されるポンプ室を介して流体を吐出する内部流路と、ポンプ室の内部圧力を増加させる保持部材の前進により、ピストンを内部流路を閉塞する位置から内部流路を開放する位置まで移動させる蓄圧部とを有する吐出器が知られている（例えば特許文献１参照）。 A dispenser is known that has a cylinder, a piston that slides on the cylinder, a holding member that advances and retreats with the piston relative to the cylinder when operated from the outside, an internal flow path that discharges fluid through a pump chamber defined by the cylinder and the piston as the holding member advances and retreats, and a pressure accumulator that moves the piston from a position that blocks the internal flow path to a position that opens the internal flow path as the holding member advances, increasing the internal pressure in the pump chamber (see, for example, Patent Document 1).

特開２００２－３５６５４号公報JP 2002-35654 A

上記のような従来の蓄圧式の吐出器は、大きな吐出（噴霧）量を得られるように設計しようとすると、シリンダのストロークが長くなると共に保持部材への操作が重くなる等の問題があった。 When attempting to design conventional pressure-accumulator dispensers like the one described above to obtain a large amount of discharge (spray), problems arose, such as the cylinder stroke becoming longer and the operation of the holding member becoming heavier.

そこで本発明の目的は、大きな吐出量を実現し易い蓄圧式の吐出器を提供することにある。 The object of the present invention is to provide a pressure-accumulator type dispenser that can easily achieve a large amount of discharge.

本発明の一態様は以下のとおりである。 One aspect of the present invention is as follows:

［１］
第１シリンダと、
前記第１シリンダ上を摺動する弾性変形可能な第１ピストンと、
前記第１シリンダよりも断面積が大きい第２シリンダと、
前記第２シリンダ上を摺動する第２ピストンと、
外部からの操作により、前記第２シリンダに対して前記第１ピストン、前記第１シリンダ及び前記第２ピストンを伴って進退し、前記第２シリンダに対する進退動作中に、前記第１シリンダに対して前記第１ピストンを伴って進退する保持部材と、
前記保持部材の進退により、前記第１シリンダ、前記第１ピストン、前記第２シリンダ及び前記第２ピストンによって区画されるポンプ室を介して流体を吐出する内部流路と、
前記ポンプ室の内部圧力を増加させる前記保持部材の前進により、前記第２ピストンの前進終了よりも前に、前記第１ピストンを、前記第１シリンダの前進規制部に接触させることで、前記第１ピストンを前記内部流路を閉塞する閉塞形状から前記内部流路を開放する開放形状まで弾性変形させる蓄圧部とを有する、吐出器。 [1]
A first cylinder;
an elastically deformable first piston that slides on the first cylinder;
A second cylinder having a cross-sectional area larger than that of the first cylinder;
a second piston sliding on the second cylinder;
a holding member that moves forward and backward with the first piston, the first cylinder, and the second piston relative to the second cylinder by an external operation, and moves forward and backward with the first piston relative to the first cylinder during the forward and backward movement with respect to the second cylinder;
an internal flow passage that discharges a fluid through a pump chamber defined by the first cylinder, the first piston, the second cylinder, and the second piston in response to the advancement and retreat of the holding member;
and a pressure accumulator section that elastically deforms the first piston from a closed shape that blocks the internal flow path to an open shape that opens the internal flow path by bringing the first piston into contact with a forward movement regulating section of the first cylinder before the forward movement of the second piston ends as a result of the forward movement of the retaining member increasing the internal pressure of the pump chamber.

［２］
前記第１シリンダの前記前進規制部は、前記第１シリンダの内周面に径方向にずれる段差を形成する段差面で構成される、［１］に記載の吐出器。 [2]
The discharge device according to [1], wherein the forward movement restricting portion of the first cylinder is configured with a step surface that forms a step that is shifted in the radial direction on the inner circumferential surface of the first cylinder.

［３］
前記第１シリンダに対して前記保持部材を後退させる弾性部材を有する、［１］又は［２］に記載の吐出器。 [3]
The dispenser according to [1] or [2], further comprising an elastic member that retracts the holding member relative to the first cylinder.

［４］
前記保持部材は、第１ステムと、前記第１ステムの内周面に取り付けられる第２ステムとを有し、
前記第１ピストンは、進退方向において、前記第１ステムと前記第２ステムに挟み込まれることで保持され、
前記第２ステムは、前記閉塞形状の前記第１ピストンによって閉塞され、前記開放形状の前記第１ピストンによって開放される開閉口を有する、［１］～［３］の何れか１つに記載の吐出器。 [4]
the holding member has a first stem and a second stem attached to an inner circumferential surface of the first stem,
the first piston is held by being sandwiched between the first stem and the second stem in a forward and backward direction,
The second stem has an opening that is closed by the first piston in the closed shape and that is opened by the first piston in the open shape.

［５］
前記第１ピストンは、前記開閉口を開閉する環状の開閉部と、前記開閉部から前進方向に向けて第１シリンダの径方向に広がるように延在する拡大部とを有し、
前記開閉部は、前記進退方向において前記第１ステムと前記第２ステムに挟み込まれることで保持される、［４］に記載の吐出器。 [5]
the first piston has an annular opening/closing portion that opens and closes the opening and closing port, and an enlarged portion that extends from the opening/closing portion in a forward direction so as to enlarge in a radial direction of the first cylinder,
The discharge device according to [4], wherein the opening/closing portion is held by being sandwiched between the first stem and the second stem in the advancing/retracting direction.

本発明によれば、大きな吐出量を実現し易い蓄圧式の吐出器を提供することができる。 The present invention provides a pressure-accumulator type dispenser that can easily achieve a large discharge volume.

本発明の一実施形態の吐出器を有する吐出容器を作動前の状態で示す縦断面図である。1 is a vertical cross-sectional view showing a dispensing container having a dispenser according to an embodiment of the present invention in a state before operation. 図１の一部拡大図である。FIG. 2 is a partially enlarged view of FIG. 図１に示す吐出容器の作動時の状態を示す縦断面図である。FIG. 2 is a vertical cross-sectional view showing a state in which the discharge container shown in FIG. 1 is in operation. 図３の一部拡大図である。FIG. 4 is a partially enlarged view of FIG. 3 .

以下、図面を参照しつつ本発明の実施形態を例示説明する。 The following describes an embodiment of the present invention with reference to the drawings.

図１～図４に示すように、本発明の一実施形態において吐出器１は、第１シリンダ２と、第１シリンダ２上を摺動する弾性変形可能な第１ピストン３と、第１シリンダ２よりも断面積が大きい第２シリンダ４と、第２シリンダ４上を摺動する第２ピストン５と、外部からの操作により、第２シリンダ４に対して第１ピストン３、第１シリンダ２及び第２ピストン５を伴って進退し、第２シリンダ４に対する進退動作中に、第１シリンダ２に対して第１ピストン３を伴って進退する保持部材６と、保持部材６の進退により、第１シリンダ２、第１ピストン３、第２シリンダ４及び第２ピストン５によって区画されるポンプ室７ａを介して流体（不図示）を吐出する内部流路７と、ポンプ室７ａの内部圧力を増加させる保持部材６の前進（下降）により、第２ピストン５の前進終了よりも前に、第１ピストン３を、第１シリンダ２の前進規制部２ａに接触させることで、第１ピストン３を内部流路７を閉塞する閉塞形状（図１に示す形状）から内部流路７を開放する開放形状（図２に示す形状）まで弾性変形させる蓄圧部８とを有する。 As shown in Figures 1 to 4, in one embodiment of the present invention, the dispenser 1 comprises a first cylinder 2, a first piston 3 that is elastically deformable and slides on the first cylinder 2, a second cylinder 4 that has a larger cross-sectional area than the first cylinder 2, a second piston 5 that slides on the second cylinder 4, a retaining member 6 that advances and retreats with the first piston 3, the first cylinder 2, and the second piston 5 relative to the second cylinder 4 by external operation, and advances and retreats with the first piston 3 relative to the first cylinder 2 during the advancement and retreat of the second cylinder 4, and a retaining member 6 that advances and retreats with the first piston 3 relative to the first cylinder 2 by the advancement and retreat of the retaining member 6. The pump has an internal flow path 7 that discharges a fluid (not shown) through a pump chamber 7a defined by the first cylinder 2, the first piston 3, the second cylinder 4, and the second piston 5, and a pressure accumulator 8 that elastically deforms the first piston 3 from a closed shape (shape shown in FIG. 1) that closes the internal flow path 7 to an open shape (shape shown in FIG. 2) that opens the internal flow path 7 by bringing the first piston 3 into contact with the forward movement restriction portion 2a of the first cylinder 2 before the forward movement of the second piston 5 ends due to the forward movement (downward movement) of the retaining member 6 that increases the internal pressure of the pump chamber 7a.

このような構成によれば、保持部材６への外部からの操作により、第１シリンダ２に対して第１ピストン３が前進して、ポンプ室７ａの内部圧力を高めてから第１シリンダ２の前進規制部２ａに接触して閉塞形状から開放形状へと弾性変形し、内部流路７を開放して蓄圧された流体を内部流路７によって吐出させることができる。また勢いのついた上記操作をそのまま続けることで、第１シリンダ２よりも断面積が大きい第２シリンダ４に対して第２ピストン５を前進させて、より多くの流体を容易に吐出させることができる。したがって、上記構成によれば、保持部材６のストロークを長くする必要性を低減し、良好な操作性を実現できるため、大きな吐出量の蓄圧式の吐出器１を容易に実現できる。 According to this configuration, by operating the holding member 6 from the outside, the first piston 3 advances relative to the first cylinder 2, increasing the internal pressure of the pump chamber 7a, and then contacts the forward movement restricting portion 2a of the first cylinder 2, elastically deforming from a closed shape to an open shape, opening the internal flow path 7 and allowing the accumulated fluid to be discharged through the internal flow path 7. In addition, by continuing the above operation with momentum, the second piston 5 advances relative to the second cylinder 4, which has a larger cross-sectional area than the first cylinder 2, and more fluid can be easily discharged. Therefore, according to the above configuration, the need to lengthen the stroke of the holding member 6 is reduced, and good operability can be achieved, so that an accumulated pressure type discharger 1 with a large discharge volume can be easily realized.

なお本実施形態において、説明の便宜上、進退方向を上下方向ともいい、前進方向を下方ともいい、後退方向を上方ともいい、第１シリンダ２の径方向、すなわち第１シリンダ２の中心軸線Ｏに直交する方向を単に径方向ともいい、第１シリンダ２の周方向、すなわち第１シリンダ２の中心軸線Ｏを周回する方向を単に周方向ともいう。また、中心軸線Ｏを含む断面を縦断面ともいう。 In this embodiment, for ease of explanation, the forward and backward directions are also referred to as the up and down directions, the forward direction is also referred to as the down direction, the backward direction is also referred to as the up direction, the radial direction of the first cylinder 2, i.e., the direction perpendicular to the central axis O of the first cylinder 2, is simply referred to as the radial direction, and the circumferential direction of the first cylinder 2, i.e., the direction going around the central axis O of the first cylinder 2, is simply referred to as the circumferential direction. Also, a cross section including the central axis O is also referred to as a longitudinal cross section.

第１シリンダ２の前進規制部２ａは、前進方向に見て第１シリンダ２の内周面に径方向内側にずれる段差を形成する段差面で構成される。このような構成によれば、前進規制部２ａを簡単な構造で実現できる。しかし吐出器１はこのような構成に限らない。 The forward movement restricting portion 2a of the first cylinder 2 is configured with a step surface that forms a step that is shifted radially inward on the inner circumferential surface of the first cylinder 2 when viewed in the forward movement direction. With this configuration, the forward movement restricting portion 2a can be realized with a simple structure. However, the dispenser 1 is not limited to this configuration.

吐出器１は、第１シリンダ２に対して保持部材６を後退させる弾性部材（蓄圧用弾性部材９ともいう）を有する。このような構成によれば、蓄圧用弾性部材９の弾性係数を適切に設定することによって、蓄圧量（吐出圧）の適切な設定を容易に実現できる。しかし吐出器１はこのような構成に限らない。 The discharger 1 has an elastic member (also called the pressure accumulation elastic member 9) that retracts the holding member 6 relative to the first cylinder 2. With this configuration, the appropriate setting of the pressure accumulation amount (discharge pressure) can be easily achieved by appropriately setting the elastic coefficient of the pressure accumulation elastic member 9. However, the discharger 1 is not limited to this configuration.

保持部材６は、第１ステム１０ａと、第１ステム１０ａの内周面に取り付けられる第２ステム１１ａとを有し、第１ピストン３は、進退方向において、第１ステム１０ａと第２ステム１１ａに挟み込まれることで保持され、第２ステム１１ａは、閉塞形状の第１ピストン３によって閉塞され、開放形状の第１ピストン３によって開放される開閉口７ｂを有する。このような構成によれば、蓄圧部８を簡単な構造で実現できる。しかし吐出器１はこのような構成に限らない。 The holding member 6 has a first stem 10a and a second stem 11a attached to the inner circumferential surface of the first stem 10a, the first piston 3 is held by being sandwiched between the first stem 10a and the second stem 11a in the forward and backward direction, and the second stem 11a has an opening 7b that is closed by the first piston 3 in a closed shape and is opened by the first piston 3 in an open shape. With this configuration, the pressure accumulator 8 can be realized with a simple structure. However, the dispenser 1 is not limited to this configuration.

第１ピストン３は、開閉口７ｂを開閉する環状の開閉部３ａと、開閉部３ａから前進方向に向けて第１シリンダ２の径方向に広がるように延在する拡大部３ｂとを有し、開閉部３ａは、進退方向において第１ステム１０ａと第２ステム１１ａに挟み込まれることで保持される。このような構成によれば、拡大部３ｂの下端を前進により前進規制部２ａに接触させることで、第１ピストン３を速やかに開放形状に弾性変形させることができる。しかし吐出器１はこのような構成に限らない。 The first piston 3 has an annular opening/closing portion 3a that opens and closes the opening/closing port 7b, and an enlarged portion 3b that extends from the opening/closing portion 3a in the forward direction so as to expand in the radial direction of the first cylinder 2, and the opening/closing portion 3a is held by being sandwiched between the first stem 10a and the second stem 11a in the forward/reverse direction. With this configuration, the first piston 3 can be quickly elastically deformed into an open shape by bringing the lower end of the enlarged portion 3b into contact with the forward movement restricting portion 2a as the piston advances. However, the dispenser 1 is not limited to this configuration.

閉塞形状であるときの第１ピストン３の開閉部３ａは、前進方向に見て第２ステム１１ａの外周面に径方向外側にずれる段差を形成するステム段差面１１ｂと、第１ステム１０ａの前進側端面１０ｅとに挟み込まれることで保持され、開閉部３ａの内周面によって開閉口７ｂを閉塞する。このような構成によれば、第１ピストン３の安定した動作を実現できる。しかし吐出器１はこのような構成に限らない。 When in the closed shape, the opening/closing portion 3a of the first piston 3 is held between the stem step surface 11b, which forms a step that is shifted radially outward on the outer circumferential surface of the second stem 11a when viewed in the forward direction, and the forward end surface 10e of the first stem 10a, and the opening/closing port 7b is closed by the inner circumferential surface of the opening/closing portion 3a. This configuration allows stable operation of the first piston 3. However, the dispenser 1 is not limited to this configuration.

閉塞形状であるときの第１ピストン３の拡大部３ｂは、開閉部３ａにおける径方向外側部分から前進方向に進退方向に沿って延在する直筒状部３ｃと、直筒状部３ｃの前進方向端部から前進方向に向けて徐々に径方向に広がる拡大筒部３ｄとを有する。閉塞形状では、開閉部３ａの内周面は第２ステム１１ａの外周面に接触し、拡大部３ｂの内周面は第２ステム１１ａの外周面に接触し、開閉部３ａの外周面と直筒状部３ｃの外周面とはそれぞれ第１シリンダ２の内周面から離間し、拡大筒部３ｄの外周面は第１シリンダ２の内周面に接触する。このような構成によれば、第１ピストン３の安定した動作をより確実に実現できる。しかし吐出器１はこのような構成に限らない。 When the first piston 3 is in the closed shape, the expanded portion 3b has a straight cylindrical portion 3c that extends from the radial outer portion of the opening/closing portion 3a along the forward/reverse direction in the forward direction, and an expanded cylindrical portion 3d that gradually expands radially from the forward end of the straight cylindrical portion 3c in the forward direction. In the closed shape, the inner peripheral surface of the opening/closing portion 3a contacts the outer peripheral surface of the second stem 11a, the inner peripheral surface of the expanded portion 3b contacts the outer peripheral surface of the second stem 11a, the outer peripheral surface of the opening/closing portion 3a and the outer peripheral surface of the straight cylindrical portion 3c are each spaced apart from the inner peripheral surface of the first cylinder 2, and the outer peripheral surface of the expanded cylindrical portion 3d contacts the inner peripheral surface of the first cylinder 2. With this configuration, the first piston 3 can be operated more reliably. However, the dispenser 1 is not limited to this configuration.

以下に吐出器１の詳細構成について説明するが、吐出器１はこのような構成に限らない。 The detailed configuration of dispenser 1 is described below, but dispenser 1 is not limited to this configuration.

吐出器１は、第２シリンダ４を有し容器１２に保持される容器側部材１３と、吐出ヘッド１５と保持部材６を有するヘッド側部材１４と、保持部材６を初期状態の位置まで後退させる弾性部材（復帰用弾性部材１６ともいう）と、オーバーキャップ１７とを有する。復帰用弾性部材１６は圧縮ばねで構成される。吐出器１と容器１２で手持ち式の吐出容器１８が構成される。 The dispenser 1 has a container side member 13 having a second cylinder 4 and held by the container 12, a head side member 14 having a dispense head 15 and a holding member 6, an elastic member (also called a return elastic member 16) that retracts the holding member 6 to its initial position, and an overcap 17. The return elastic member 16 is composed of a compression spring. The dispenser 1 and the container 12 form a handheld dispenser container 18.

容器１２は、口部１２ａ、胴部１２ｂ及び底部を有する。容器１２内に収容される流体としての内容物は液体であり、吐出ヘッド１５による吐出形態は霧状である。しかし吐出形態は霧状に限らず、内容物も液状に限らない。 The container 12 has a mouth 12a, a body 12b, and a bottom. The fluid content contained in the container 12 is liquid, and is ejected by the ejection head 15 in the form of a mist. However, the ejection form is not limited to a mist, and the content is not limited to a liquid.

ヘッド側部材１４は、吐出ヘッド１５、第１ステム部材１０、第２ステム部材１１、第１ピストン３、第１シリンダ・第２ピストン部材１９及び蓄圧用弾性部材９を有する。 The head side member 14 has a discharge head 15, a first stem member 10, a second stem member 11, a first piston 3, a first cylinder/second piston member 19, and a pressure accumulation elastic member 9.

吐出ヘッド１５は、押し下げ操作を受ける上面と、内容物の吐出口７ｃを有し、第１ステム１０ａの上端に取り付けられる。吐出口７ｃは内部流路７の最下流部を構成する。 The discharge head 15 has an upper surface that is pressed down and a discharge outlet 7c for the contents, and is attached to the upper end of the first stem 10a. The discharge outlet 7c constitutes the most downstream part of the internal flow path 7.

第１ステム部材１０は、第１ステム１０ａと、第１ステム１０ａよりも径方向外側に設けられ第１ステム１０ａに一体に連なる外周連結部１０ｂとを有する。外周連結部１０ｂは、吐出ヘッド１５への押し下げ操作前の初期状態から第１ピストン３が開放形状に弾性変形するまでの所定ストローク分の前進を第１シリンダ２に対してできるように、第１シリンダ２に対して前進可能に配置される。また外周連結部１０ｂは、第１シリンダ２が押し下げられた状態から初期状態に復帰するように、第１シリンダ２の外周面に引っ掛かって引っ張り上げる引っ掛かり部１０ｃを有する。また外周連結部１０ｂは、復帰用弾性部材１６の上端部を受ける第１上側受け部１０ｄを有する。 The first stem member 10 has a first stem 10a and an outer peripheral connecting portion 10b that is provided radially outward of the first stem 10a and is integrally connected to the first stem 10a. The outer peripheral connecting portion 10b is arranged to be able to advance relative to the first cylinder 2 so that it can advance a predetermined stroke relative to the first cylinder 2 from the initial state before the ejection head 15 is pressed down until the first piston 3 is elastically deformed to an open shape. The outer peripheral connecting portion 10b also has a hook portion 10c that hooks onto and pulls up the outer peripheral surface of the first cylinder 2 so that the first cylinder 2 returns from the pressed-down state to its initial state. The outer peripheral connecting portion 10b also has a first upper receiving portion 10d that receives the upper end of the return elastic member 16.

第２ステム部材１１は、第２ステム１１ａと、第２ステム１１ａの下端を閉塞する底壁１１ｃと、蓄圧用弾性部材９の上端部を受ける第２上側受け部１１ｄを有する。蓄圧用弾性部材９は圧縮ばねで構成される。操作性の観点から、蓄圧用弾性部材９の弾性係数は、復帰用弾性部材１６の弾性係数よりも小さいことが好ましい。第２ステム１１ａの開閉口７ｂは、周方向に並ぶ複数の貫通穴で構成される。 The second stem member 11 has a second stem 11a, a bottom wall 11c that closes the lower end of the second stem 11a, and a second upper receiving portion 11d that receives the upper end of the pressure-accumulating elastic member 9. The pressure-accumulating elastic member 9 is composed of a compression spring. From the viewpoint of operability, it is preferable that the elastic coefficient of the pressure-accumulating elastic member 9 is smaller than the elastic coefficient of the return elastic member 16. The opening 7b of the second stem 11a is composed of multiple through holes aligned in the circumferential direction.

第１シリンダ・第２ピストン部材１９は、第１シリンダ２と第２ピストン５を一体に有する。第１シリンダ２は中心軸線Ｏを中心とする筒状をなす。なお第１シリンダ２は円筒状に限らず、円筒状以外の筒状をなす構成であってもよい。第１シリンダ２は、段差面よりも下方に、蓄圧用弾性部材９の下端部を受ける第２下側受け部２ｂを有する。第２ピストン５は第１シリンダ２の下端部から径方向外側に延在し、第１シリンダ２と同心の環状をなす。 The first cylinder/second piston member 19 has a first cylinder 2 and a second piston 5 integrally. The first cylinder 2 is cylindrical with the central axis O as its center. The first cylinder 2 is not limited to being cylindrical, and may be configured to be a cylindrical shape other than cylindrical. The first cylinder 2 has a second lower receiving portion 2b below the step surface that receives the lower end of the pressure accumulation elastic member 9. The second piston 5 extends radially outward from the lower end of the first cylinder 2 and forms a ring shape concentric with the first cylinder 2.

容器側部材１３は、第２シリンダ部材２０、パイプ２１、抜け止め部材２２、装着キャップ２３を有する。 The container side member 13 has a second cylinder member 20, a pipe 21, a retaining member 22, and an attachment cap 23.

第２シリンダ部材２０は、第２シリンダ４、パイプ保持部２０ａ、逆流抑制部２０ｂ及びフランジ２０ｃを有する。第２シリンダ４は第１シリンダ２と同軸の筒状をなす。パイプ保持部２０ａはパイプ２１を保持する。パイプ２１は容器１２内の内容物をポンプ室７ａに向けて通過させることができる。第２シリンダ４の下端部とパイプ保持部２０ａとの間には、内部流路７の逆流を抑制する逆流抑制部２０ｂが連ねて設けられる。逆流抑制部２０ｂは玉弁で構成されるが、これに限らない。フランジ２０ｃは第２シリンダ４の上端部から径方向外側に延在する。パイプ２１を設けない構成としてもよい。 The second cylinder member 20 has a second cylinder 4, a pipe holding portion 20a, a backflow suppression portion 20b, and a flange 20c. The second cylinder 4 is cylindrical and coaxial with the first cylinder 2. The pipe holding portion 20a holds a pipe 21. The pipe 21 allows the contents in the container 12 to pass through toward the pump chamber 7a. Between the lower end of the second cylinder 4 and the pipe holding portion 20a, a backflow suppression portion 20b that suppresses backflow in the internal flow path 7 is provided in a series. The backflow suppression portion 20b is composed of a ball valve, but is not limited to this. The flange 20c extends radially outward from the upper end of the second cylinder 4. A configuration without providing the pipe 21 is also possible.

抜け止め部材２２は、第１シリンダ２と同心の環状をなし、第２シリンダ４の上端部の内周面と上端面とに接触するように第２シリンダ部材２０に取り付けられる。また抜け止め部材２２は、復帰用弾性部材１６の下端部を受ける第１下側受け部２２ａを有する。 The retaining member 22 is annular and concentric with the first cylinder 2, and is attached to the second cylinder member 20 so as to contact the inner circumferential surface and the upper end surface of the upper end of the second cylinder 4. The retaining member 22 also has a first lower receiving portion 22a that receives the lower end of the return elastic member 16.

装着キャップ２３は、容器１２の口部１２ａの外周面に取り付けられる装着筒２３ａと、装着筒２３ａの上端部に連なるキャップ上部２３ｂとを有する。キャップ上部２３ｂの下面と容器１２の口部１２ａの上端面との間にパッキン２４、フランジ２０ｃ及び抜け止め部材２２の外周部とが挟み込まれることで保持される。キャップ上部２３ｂはオーバーキャップ１７を着脱可能に嵌合される嵌合部２３ｃを有する。 The mounting cap 23 has a mounting tube 23a attached to the outer circumferential surface of the mouth 12a of the container 12, and a cap upper part 23b connected to the upper end of the mounting tube 23a. The gasket 24, the flange 20c, and the outer circumferential part of the retaining member 22 are sandwiched between the lower surface of the cap upper part 23b and the upper end surface of the mouth 12a of the container 12, thereby holding the gasket 24, the flange 20c, and the outer circumferential part of the retaining member 22. The cap upper part 23b has a fitting part 23c into which the overcap 17 is detachably fitted.

内部流路７はパイプ２１の内部、ポンプ室７ａ、開閉口７ｂ、第２ステム１１ａの内部、第１ステム１０ａの内部及び吐出ヘッド１５の内部（吐出口７ｃを含む）によって構成される。 The internal flow path 7 is composed of the inside of the pipe 21, the pump chamber 7a, the opening/closing port 7b, the inside of the second stem 11a, the inside of the first stem 10a, and the inside of the discharge head 15 (including the discharge port 7c).

第１ピストン３は例えばゴム又はエラストマーによって形成される。第１ステム部材１０、第２ステム部材１１、第１シリンダ・第２ピストン部材１９、第２シリンダ部材２０は、例えば合成樹脂製である。蓄圧用弾性部材９と復帰用弾性部材１６は金属製であるが、これに限らず例えば合成樹脂製としてもよい。 The first piston 3 is made of, for example, rubber or elastomer. The first stem member 10, the second stem member 11, the first cylinder/second piston member 19, and the second cylinder member 20 are made of, for example, synthetic resin. The pressure-accumulating elastic member 9 and the return elastic member 16 are made of metal, but are not limited to this and may be made of, for example, synthetic resin.

本発明は前述した実施形態に限定されず、その要旨を逸脱しない範囲で種々変更可能である。 The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the invention.

したがって、前述した実施形態の吐出器１は、第１シリンダ２と、第１シリンダ２上を摺動する弾性変形可能な第１ピストン３と、第１シリンダ２よりも断面積が大きい第２シリンダ４と、第２シリンダ４上を摺動する第２ピストン５と、外部からの操作により、第２シリンダ４に対して第１ピストン３、第１シリンダ２及び第２ピストン５を伴って進退し、第２シリンダ４に対する進退動作中に、第１シリンダ２に対して第１ピストン３を伴って進退する保持部材６と、保持部材６の進退により、第１シリンダ２、第１ピストン３、第２シリンダ４及び第２ピストン５によって区画されるポンプ室７ａを介して流体を吐出する内部流路７と、ポンプ室７ａの内部圧力を増加させる保持部材６の前進により、第２ピストン５の前進終了よりも前に、第１ピストン３を、第１シリンダ２の前進規制部２ａに接触させることで、第１ピストン３を内部流路７を閉塞する閉塞形状から内部流路７を開放する開放形状まで弾性変形させる蓄圧部８とを有する、吐出器１である限り変更可能である。 Therefore, the dispenser 1 of the above-mentioned embodiment includes a first cylinder 2, a first piston 3 that is elastically deformable and slides on the first cylinder 2, a second cylinder 4 that has a larger cross-sectional area than the first cylinder 2, a second piston 5 that slides on the second cylinder 4, a retaining member 6 that advances and retreats with the first piston 3, the first cylinder 2, and the second piston 5 relative to the second cylinder 4 by external operation, and advances and retreats with the first piston 3 relative to the first cylinder 2 during the advancement and retreat of the retaining member 6, The discharger 1 can be modified as long as it has an internal flow path 7 that discharges the fluid through a pump chamber 7a defined by a first cylinder 2, a first piston 3, a second cylinder 4, and a second piston 5, and a pressure accumulator 8 that elastically deforms the first piston 3 from a closed shape that closes the internal flow path 7 to an open shape that opens the internal flow path 7 by bringing the first piston 3 into contact with the forward movement restriction portion 2a of the first cylinder 2 before the forward movement of the second piston 5 ends due to the forward movement of the retaining member 6 that increases the internal pressure of the pump chamber 7a.

１吐出器
２第１シリンダ
２ａ前進規制部
２ｂ第２下側受け部
３第１ピストン
３ａ開閉部
３ｂ拡大部
３ｃ直筒状部
３ｄ拡大筒部
４第２シリンダ
５第２ピストン
６保持部材
７内部流路
７ａポンプ室
７ｂ開閉口
７ｃ吐出口
８蓄圧部
９蓄圧用弾性部材
１０第１ステム部材
１０ａ第１ステム
１０ｂ外周連結部
１０ｃ引っ掛かり部
１０ｄ第１上側受け部
１０ｅ前進側端面
１１第２ステム部材
１１ａ第２ステム
１１ｂステム段差面
１１ｃ底壁
１１ｄ第２上側受け部
１２容器
１２ａ口部
１２ｂ胴部
１３容器側部材
１４ヘッド側部材
１５吐出ヘッド
１６復帰用弾性部材
１７オーバーキャップ
１８吐出容器
１９第１シリンダ・第２ピストン部材
２０第２シリンダ部材
２０ａパイプ保持部
２０ｂ逆流抑制部
２０ｃフランジ
２１パイプ
２２抜け止め部材
２２ａ第１下側受け部
２３装着キャップ
２３ａ装着筒
２３ｂキャップ上部
２３ｃ嵌合部
２４パッキン
Ｏ中心軸線 REFERENCE SIGNS LIST 1 Discharger 2 First cylinder 2a Advancement restriction portion 2b Second lower receiving portion 3 First piston 3a Opening/closing portion 3b Enlarged portion 3c Straight cylindrical portion 3d Enlarged cylindrical portion 4 Second cylinder 5 Second piston 6 Holding member 7 Internal flow path 7a Pump chamber 7b Opening/closing port 7c Discharge port 8 Pressure accumulation portion 9 Pressure accumulation elastic member 10 First stem member 10a First stem 10b Outer periphery connecting portion 10c Hook portion 10d First upper receiving portion 10e Advancement side end surface 11 Second stem member 11a Second stem 11b Stem step surface 11c Bottom wall 11d Second upper receiving portion 12 Container 12a Mouth portion 12b Body portion 13 Container side member 14 Head side member 15 Discharge head 16 Return elastic member 17 Overcap 18 Discharge container 19 First cylinder/second piston member 20 Second cylinder member 20a Pipe holding portion 20b Backflow suppression portion 20c Flange 21 Pipe 22 Anti-dislodgement member 22a First lower receiving portion 23 Mounting cap 23a Mounting tube 23b Cap upper portion 23c Fitting portion 24 Gasket O Central axis

Claims

第１シリンダと、
前記第１シリンダ上を摺動する弾性変形可能な第１ピストンと、
前記第１シリンダよりも断面積が大きい第２シリンダと、
前記第２シリンダ上を摺動する第２ピストンと、
外部からの操作により、前記第２シリンダに対して前記第１ピストン、前記第１シリンダ及び前記第２ピストンを伴って進退し、前記第２シリンダに対する進退動作中に、前記第１シリンダに対して前記第１ピストンを伴って進退する保持部材と、
前記保持部材の進退により、前記第１シリンダ、前記第１ピストン、前記第２シリンダ及び前記第２ピストンによって区画されるポンプ室を介して流体を吐出する内部流路と、
前記ポンプ室の内部圧力を増加させる前記保持部材の前進により、前記第２ピストンの前進終了よりも前に、前記第１ピストンを、前記第１シリンダの前進規制部に接触させることで、前記第１ピストンを前記内部流路を閉塞する閉塞形状から前記内部流路を開放する開放形状まで弾性変形させる蓄圧部とを有する、吐出器。 A first cylinder;
an elastically deformable first piston that slides on the first cylinder;
A second cylinder having a cross-sectional area larger than that of the first cylinder;
a second piston sliding on the second cylinder;
a holding member that moves forward and backward with the first piston, the first cylinder, and the second piston relative to the second cylinder by an external operation, and moves forward and backward with the first piston relative to the first cylinder during the forward and backward movement with respect to the second cylinder;
an internal flow passage that discharges a fluid through a pump chamber defined by the first cylinder, the first piston, the second cylinder, and the second piston in response to the advancement and retreat of the holding member;
and a pressure accumulator section that elastically deforms the first piston from a closed shape that blocks the internal flow path to an open shape that opens the internal flow path by bringing the first piston into contact with a forward movement regulating section of the first cylinder before the forward movement of the second piston ends as a result of the forward movement of the retaining member increasing the internal pressure of the pump chamber.

前記第１シリンダの前記前進規制部は、前記第１シリンダの内周面に径方向にずれる段差を形成する段差面で構成される、請求項１に記載の吐出器。 The dispenser according to claim 1, wherein the forward movement restriction portion of the first cylinder is configured with a step surface that forms a step that is radially shifted on the inner circumferential surface of the first cylinder.

前記第１シリンダに対して前記保持部材を後退させる弾性部材を有する、請求項１に記載の吐出器。 The dispenser according to claim 1, further comprising an elastic member that retracts the holding member relative to the first cylinder.

前記保持部材は、第１ステムと、前記第１ステムの内周面に取り付けられる第２ステムとを有し、
前記第１ピストンは、進退方向において、前記第１ステムと前記第２ステムに挟み込まれることで保持され、
前記第２ステムは、前記閉塞形状の前記第１ピストンによって閉塞され、前記開放形状の前記第１ピストンによって開放される開閉口を有する、請求項１に記載の吐出器。 the holding member has a first stem and a second stem attached to an inner circumferential surface of the first stem,
the first piston is held by being sandwiched between the first stem and the second stem in a forward and backward direction,
The dispenser according to claim 1 , wherein the second stem has an opening that is closed by the first piston in the closed configuration and that is opened by the first piston in the open configuration.

前記第１ピストンは、前記開閉口を開閉する環状の開閉部と、前記開閉部から前進方向に向けて第１シリンダの径方向に広がるように延在する拡大部とを有し、
前記開閉部は、前記進退方向において前記第１ステムと前記第２ステムに挟み込まれることで保持される、請求項４に記載の吐出器。 the first piston has an annular opening/closing portion that opens and closes the opening and closing port, and an enlarged portion that extends from the opening/closing portion in a forward direction so as to enlarge in a radial direction of the first cylinder,
The discharge device according to claim 4 , wherein the opening/closing part is held by being sandwiched between the first stem and the second stem in the advancing/retracting direction.