WO2018220671A1 - Liquid ejection pump - Google Patents

Liquid ejection pump Download PDF

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Publication number
WO2018220671A1
WO2018220671A1 PCT/JP2017/019896 JP2017019896W WO2018220671A1 WO 2018220671 A1 WO2018220671 A1 WO 2018220671A1 JP 2017019896 W JP2017019896 W JP 2017019896W WO 2018220671 A1 WO2018220671 A1 WO 2018220671A1
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Prior art keywords
coil spring
stem
cylinder
liquid jet
jet pump
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PCT/JP2017/019896
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French (fr)
Japanese (ja)
Inventor
佐藤　照雄
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株式会社資生堂
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Priority to PCT/JP2017/019896 priority Critical patent/WO2018220671A1/en
Publication of WO2018220671A1 publication Critical patent/WO2018220671A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents

Definitions

  • the present invention relates to a liquid ejection pump for ejecting liquid contained in a container.
  • a liquid ejection pump for ejecting liquid contained in a container
  • a cylinder for storing the contents sucked up from the container and a cylinder spring standing up above the cylinder so as to be vertically movable in an upward biased state.
  • a liquid comprising: a stem; a piston linked to the stem and slidably arranged in the cylinder; and a pressing head mounted on an upper end portion of the stem and having a nozzle communicating with the stem.
  • the pressing head when using the liquid jet pump, especially in the initial stage of operation from the stationary state until the pressing head starts moving, the pressing head can be lightly pushed down. In the process of returning to the position, a liquid jet pump having a restoring force capable of reliably sucking up the contents from the container into the cylinder is required even if the contents have high viscosity.
  • the pressing head in a liquid ejection pump for ejecting liquid contained in a container, the pressing head can be lightly pressed down in the initial operation from the stationary state when the liquid ejection pump is used until the pressing head starts to move.
  • the pressing head in the process until the pressing head returns to the original position after the ejection of the contents, even if the contents are highly viscous, the contents are surely sucked into the cylinder from the container. It is an object of the present invention to provide a liquid jet pump having a restoring force that can be restored.
  • a cylinder for storing the contents sucked up from the inside of the container, and a stem standing above the cylinder so as to be movable up and down in an upward biased state by a coil spring An ejection pump comprising: a piston linked to the stem and slidably arranged in the cylinder; and a pressing head mounted on an upper end portion of the stem and having a nozzle communicating with the stem.
  • a non-linear characteristic coil spring as the coil spring, the operation of the pressing head is lightened at the beginning of the operation until it starts moving from the stationary state.
  • the pressing head is returned to its original position. In the restoration process until it returns to, it is found that sufficient restoring force is demonstrated, and the contents are surely sucked into the cylinder, and the present invention is completed. It came to that.
  • the present invention provides a cylinder for storing the contents sucked up from the inside of the container, a stem erected above the cylinder so as to be movable up and down by a coil spring, and a vertical slide in the cylinder linked to the stem.
  • An ejection pump comprising: a piston that is movably disposed; and a pressing head that is mounted on an upper end portion of the stem and has a nozzle that communicates with the stem.
  • the coil spring includes a non-linear characteristic coil spring It is a liquid jet pump characterized by being.
  • the present invention is the liquid jet pump, wherein the non-linear characteristic coil spring is an unequal pitch coil spring or a taper coil spring.
  • the present invention is the liquid jet pump, wherein the unequal pitch coil spring is an unequal pitch coil spring in which a coarse winding portion is formed on one end side and a dense winding portion is formed on the other end side. is there.
  • the present invention is the liquid jet pump, wherein the unequal pitch coil pulling is an unequal pitch coil spring in which coarse winding portions and dense winding portions are alternately formed.
  • the pressing head When using a liquid ejection pump, the pressing head can be pushed down with a small force in the initial stage of operation until the pressing head starts moving from a stationary state. Even a person can easily push down the pressing head to eject the contents.
  • liquid jet pump of the present invention will be described in detail below.
  • the liquid jet pump is a liquid jet pump that is attached to the mouth of the container (1) that contains the liquid contents, sucks the contents from the container by a pump mechanism, and jets them from the nozzle (FIG. 1).
  • the upper end of the cylinder (3) is connected to the mounting cap (10).
  • the cylinder By attaching the mounting cap to the mouth of the container (1), the cylinder is installed inside the container and is attached to the bottom of the cylinder.
  • the contents can be sucked into the cylinder through the raising pipe (11).
  • the contents stored in the container are not limited to liquids, but may be any fluid property that can be sucked up by a pump mechanism, and may be, for example, cream or gel.
  • the liquid jet pump has a cylinder (3) for storing the contents sucked up from the container, and a stem that stands up above the cylinder so as to move up and down in an upward biased state by a coil spring (4). (5), a piston (6) linked to the stem and slidably arranged in the cylinder, and a nozzle (7) attached to the upper end of the stem and communicating with the stem. And a pressing head (8).
  • FIG. 2 shows an example in which the stem (5) is configured by connecting the upper stem (5a) and the lower stem (5b) in the axial direction, but the stem (5) may be formed integrally.
  • a combination of the upper stem (5a) and the lower stem (5b) is simply a stem ( 5) and will be described.
  • the pump mechanism (12) is composed of a cylinder (3) and a piston (6).
  • the cylinder (3) is suspended from a mounting cap (10) for closing the mouth of the container, and a suction pipe (11) extending to the bottom of the container is connected to the lower part.
  • the poppet valve body (9) is disposed inside the cylinder (3) so as to be movable up and down, and forms a suction valve (13) between the lower end of the poppet valve body (9) and the inner surface of the bottom of the cylinder (3).
  • the stem (5) extends upward from the cylinder (3), and a communication hole (14) is opened on one side of the lower part.
  • the inner peripheral wall of the lower end is in sliding contact with the outer surface of the poppet valve body (9).
  • the upper end portion of the coil spring (4) is in contact with the bottom surface of the stem (5) and is supported from the outside in the radial direction by a portion continuous from the bottom surface of the stem (5).
  • the lower end portion of the coil spring (4) is in contact with the upper surface of the flange portion (9a) extending in the horizontal direction from the side surface of the poppet valve body, and is supported from the radially outer side by the inner surface of the cylinder (3).
  • the coil spring (4) is sandwiched between the bottom surface of the stem (5) and the top surface of the flange portion (9a) and supports the stem (5) in a state of being biased upward.
  • the position where the coil spring is disposed and the attachment method are not limited to this, and can be widely used as long as the stem (5) can be biased upward.
  • the liquid jet pump of the present invention is characterized in that the coil spring is a non-linear characteristic coil spring.
  • the non-linear characteristic has at least two numerical values for the spring constant, and when the deformation amount exceeds a predetermined threshold, the spring constant is switched from a small value to a large value, or the spring constant is continuously changed with respect to the contraction amount. It can be obtained by changing.
  • the operation of the pressing head can be lightened at the beginning of the operation from the stationary state to the start of movement, while the restoration process until the pressing head returns to its original position after the contents have been ejected In this case, a sufficient repulsive force is exerted, and the contents can be surely sucked into the cylinder.
  • non-linear characteristic coil spring an unequal pitch coil spring, a taper coil spring, a conical coil spring, a drum coil spring, a barrel coil spring, and a bell coil spring can be used. Moreover, the coil spring provided with the appropriate nonlinear characteristic can also be obtained by combining these.
  • Fig. 3 shows an example of an unequal pitch coil spring.
  • the densely wound portion having a small pitch mainly contracts at the beginning of contraction, and after the densely wound portion contracts, the coarsely wound portion contracts next. It becomes possible to adjust the elastic repulsive force of the spring in the initial stage and thereafter.
  • the length of 40 to 80% of the total length of the coil spring is composed of a rough winding portion, and the length of 20 to 60% is a dense winding portion. It is preferable to comprise.
  • the pitch of the spring of the coarsely wound portion is 2 to 6 mm
  • the pitch of the densely wound portion is 40 to 75% of the pitch of the coarsely wound portion. More preferably, it is preferably 40 to 60%.
  • the wire diameter of the spring in order to adjust the repulsive force according to the discharge amount, there are various variations in the wire diameter of the spring, but it is preferable to use a spring in the range of 0.6 to 0.9 mm ⁇ .
  • the pressing head can be pushed down lightly in the initial stage of operation from the stationary state until the pressing head starts to move.
  • the total length of the coil spring is preferably 110 to 160% of the length of the space in which the coil spring in the liquid jet pump is installed.
  • Fig. 4 shows changes in pressure with respect to the amount of contraction (stroke length) for an unequal pitch coil spring and a normal equal pitch coil spring.
  • the non-uniform pitch coil spring exhibits the same pressure as a normal coil spring at a stroke of 0 to 3 mm, but becomes stronger than a normal coil spring from a stroke of about 4 mm, and exhibits non-linear characteristics.
  • the unequal pitch coil spring can appropriately adjust the pressure against the stroke length by changing the configuration of the coarsely wound portion and the densely wound portion.
  • the unequal pitch coil spring can form a coarsely wound portion with a large pitch on one end side and a densely wound portion with a small pitch on the other end side.
  • the change in pitch from the coarsely wound portion to the densely wound portion may be continuous or stepwise.
  • the pitch of the spring can be changed also in the coarsely wound portion and the densely wound portion, and the change may be continuous or stepwise.
  • FIG. 3B shows an embodiment in which densely wound portions are disposed between the coarsely wound portions disposed at both ends of the spring.
  • FIG. 3C shows an embodiment in which densely wound portions are disposed at both ends of the spring, and a coarsely wound portion is disposed between the two closely wound portions.
  • Fig. 5 shows an example of a taper coil spring.
  • the taper coil spring refers to a spring in which the wire diameter is not uniform but is tapered. By using the taper coil spring, the spring constant can be continuously changed with respect to the contraction amount.
  • FIG. 6 shows examples of (a) conical coil springs, (b) drum coil springs, (c) barrel coil springs, and (d) bell-shaped coil springs. Since the spring constant is small in the portion where the coil diameter is large and the spring constant is large in the portion where the coil diameter is small, the spring constant can be continuously changed with respect to the contraction amount by using such a coil spring. it can.
  • FIG. 7 shows a change in the pressure of the liquid jet pump of the present invention incorporating a coil spring of unequal pitch and the conventional liquid jet pump incorporating a coil spring of equal pitch.
  • the graph shows the result of measuring the change in the pressing pressure (N) with respect to the stroke using a pressure measuring instrument (autograph). Since the pressing head starts to descend, the pressure (N) indicated by the stroke of 0.5 to 1 mm is the pressure felt by the user's finger.
  • the liquid jet pump incorporating a coil spring with an unequal pitch can keep the initial pressure (stroke 0.5-1 mm) low, while at the time it is fully pushed (stroke about 7.5 mm). It was confirmed that the pressure was close to the pressure (N) of the conventional liquid jet pump.
  • the coil springs of unequal pitch used for the measurement had a total length of 23 mm, a coil outer diameter of 7.3 mm, a wire diameter of 0.7 mm, a rough winding portion of 16 mm (about 70% of the total length), and a dense winding portion of 7 mm (full length). About 30%), the pitch of the coarsely wound portion is 2 mm, and the pitch of the closely wound portion is 1 mm.
  • the pitch of a conventional equal pitch coil spring for comparison is 2 mm.
  • the liquid jet pump of the present invention incorporating the coil springs of unequal pitch can push down the pressing head with a small force in the initial operation from the stationary state until the pressing head starts moving. It was confirmed that a sufficient repulsive force was exerted in the restoration process until the pressing head returned to the original position after the ejection of.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

A liquid ejection pump (1) comprises a cylinder (3) that stores content sucked up from inside a container, a stem (5) that stands upright above the cylinder and can move vertically in a state of being urged upward by a coil spring (4), a piston (6) that is coupled to the stem and is provided so as to be capable of freely sliding vertically inside the cylinder, and a push down head (8) that is fitted to the upper end of the stem and in which a nozzle (7) is formed that communicates with the inside of the stem, wherein: the coil spring (4) is a coil spring having a non-linear characteristic; the push down head can be lightly pushed down in an operation initial period from a static state when the liquid ejection pump is to be used until when the push down head begins to move; and after ejection, the push down head returns with certainty to its original position.

Description

液体噴出ポンプLiquid jet pump
　本発明は、容器内に収容する液体を噴出するための液体噴出ポンプに関する。 The present invention relates to a liquid ejection pump for ejecting liquid contained in a container.
　従来より、容器内に収容した液体を噴出するための液体噴出ポンプとして、容器内から吸い上げた内容物を貯蔵するシリンダと、コイルスプリングにより上方付勢状態で上下動可能に前記シリンダ上方に起立したステムと、該ステムに連係し前記シリンダ内に上下摺動自在に配設されたピストンと、前記ステムの上端部に装着され該ステム内に連通するノズルが形成された押下ヘッドと、を備える液体噴出ポンプが知られている。 Conventionally, as a liquid ejection pump for ejecting liquid contained in a container, a cylinder for storing the contents sucked up from the container and a cylinder spring standing up above the cylinder so as to be vertically movable in an upward biased state. A liquid comprising: a stem; a piston linked to the stem and slidably arranged in the cylinder; and a pressing head mounted on an upper end portion of the stem and having a nozzle communicating with the stem. An ejection pump is known.
　しかしながら、このような液体噴出ポンプは、使用者が手に持ち、押下ヘッドを指で下方に押し込んで内容物を噴出するが、静置した状態から、押下ヘッドが動き出すまでには、強い力が必要であり、女性、子供、高齢者等の指の力が弱い使用者では、押下ヘッドを押し下げることが困難な場合があった。また、無理に指に力を入れて押し下げようとすると、ノズルが思わぬ方向に向いて誤った方向に内容物を噴出したり、手が滑って容器を落としてしまうような問題があった。 However, such a liquid ejection pump is held by a user and pushes the pressing head downward with a finger to eject the contents, but there is a strong force until the pressing head starts moving from a stationary state. In some users, such as women, children, and elderly people, whose finger strength is weak, it may be difficult to push down the pressing head. In addition, if the finger is forced to push down, there is a problem that the nozzle faces an unexpected direction and the contents are ejected in the wrong direction, or the hand slips and drops the container.
　一方、押下ヘッドを軽い力で押し下げることができるように、コイルスプリングのバネ定数を小さくすると、ステムを押し上げる力が弱くなり、粘度の高い内容物の場合には、容器内からシリンダ内に吸い上げることができず、押下ヘッドが元の位置に戻らないため、再度、内容物を噴出することが不可能な事態が生じる。 On the other hand, if the spring constant of the coil spring is made small so that the pressing head can be pushed down with a light force, the force that pushes up the stem will be weakened. Since the pressing head does not return to the original position, the contents cannot be ejected again.
　したがって、液体噴出ポンプを使用する際、特に静置状態から押下ヘッドが動き出すまでの作動初期においては、押下ヘッドを軽く押し下げることができ、また内容物を噴出し終わった後、押下ヘッドが元の位置に戻るまでの過程においては、たとえ粘度が高い内容物であっても、容器からシリンダ内に確実に内容物を吸い上げることができる復元力を備えた液体噴出ポンプが求められる。 Therefore, when using the liquid jet pump, especially in the initial stage of operation from the stationary state until the pressing head starts moving, the pressing head can be lightly pushed down. In the process of returning to the position, a liquid jet pump having a restoring force capable of reliably sucking up the contents from the container into the cylinder is required even if the contents have high viscosity.
実開平７－１３７８０号公報Japanese Utility Model Publication No.7-13780
　本発明は、容器内に収容した液体を噴出するための液体噴出ポンプにおいて、液体噴出ポンプを使用する際の静置状態から押下ヘッドが動き出すまでの作動初期においては、押下ヘッドを軽く押し下げることができ、一方、内容物を噴出し終わった後、押下ヘッドが元の位置に戻るまでの過程においては、たとえ粘度が高い内容物であっても、容器内からシリンダ内に確実に内容物を吸い上げることができる復元力を備えた液体噴出ポンプを提供することを課題とする。 According to the present invention, in a liquid ejection pump for ejecting liquid contained in a container, the pressing head can be lightly pressed down in the initial operation from the stationary state when the liquid ejection pump is used until the pressing head starts to move. On the other hand, in the process until the pressing head returns to the original position after the ejection of the contents, even if the contents are highly viscous, the contents are surely sucked into the cylinder from the container. It is an object of the present invention to provide a liquid jet pump having a restoring force that can be restored.
　前記課題を解決するために本発明者が検討を行った結果、容器内から吸い上げた内容物を貯蔵するシリンダと、コイルスプリングにより上方付勢状態で上下動可能に前記シリンダ上方に起立したステムと、該ステムに連係し前記シリンダ内に上下摺動自在に配設されたピストンと、前記ステムの上端部に装着され該ステム内に連通するノズルが形成された押下ヘッドと、を備える噴出ポンプにおいて、前記コイルスプリングを、非線形特性コイルスプリングとすることにより、静置状態から動き出すまでの作動初期には押下ヘッドの作動が軽くなる一方、内容物を噴出し終わった後、押下ヘッドが元の位置に戻るまでの復元過程においては十分な復元力が発揮され、内容物が確実にシリンダ内に吸い上げられることを見出し、本発明を完成するに至った。 As a result of investigation by the present inventor in order to solve the above problems, a cylinder for storing the contents sucked up from the inside of the container, and a stem standing above the cylinder so as to be movable up and down in an upward biased state by a coil spring, An ejection pump comprising: a piston linked to the stem and slidably arranged in the cylinder; and a pressing head mounted on an upper end portion of the stem and having a nozzle communicating with the stem. By using a non-linear characteristic coil spring as the coil spring, the operation of the pressing head is lightened at the beginning of the operation until it starts moving from the stationary state. On the other hand, after the contents have been ejected, the pressing head is returned to its original position. In the restoration process until it returns to, it is found that sufficient restoring force is demonstrated, and the contents are surely sucked into the cylinder, and the present invention is completed. It came to that.
　すなわち本発明は、容器内から吸い上げた内容物を貯蔵するシリンダと、コイルスプリングにより上方付勢状態で上下動可能に前記シリンダ上方に起立したステムと、該ステムに連係し前記シリンダ内に上下摺動自在に配設されたピストンと、前記ステムの上端部に装着され該ステム内に連通するノズルが形成された押下ヘッドと、を備える噴出ポンプであって、前記コイルスプリングが、非線形特性コイルスプリングであることを特徴とする液体噴出ポンプである。 That is, the present invention provides a cylinder for storing the contents sucked up from the inside of the container, a stem erected above the cylinder so as to be movable up and down by a coil spring, and a vertical slide in the cylinder linked to the stem. An ejection pump comprising: a piston that is movably disposed; and a pressing head that is mounted on an upper end portion of the stem and has a nozzle that communicates with the stem. The coil spring includes a non-linear characteristic coil spring It is a liquid jet pump characterized by being.
　さらに本発明は、前記非線形特性コイルスプリングが、不等ピッチコイルスプリング又はテーパコイルスプリングであることを特徴とする液体噴出ポンプである。 Furthermore, the present invention is the liquid jet pump, wherein the non-linear characteristic coil spring is an unequal pitch coil spring or a taper coil spring.
　さらに本発明は、前記不等ピッチコイルスプリングが、一端側に粗巻部が形成され、他端側に密巻部が形成された不等ピッチコイルスプリングであることを特徴とする液体噴出ポンプである。 Further, the present invention is the liquid jet pump, wherein the unequal pitch coil spring is an unequal pitch coil spring in which a coarse winding portion is formed on one end side and a dense winding portion is formed on the other end side. is there.
　また本発明は、前記不等ピッチコイルプリングが、粗巻部と密巻部とが交互に形成された不等ピッチコイルスプリングであることを特徴とする液体噴出ポンプである。 Further, the present invention is the liquid jet pump, wherein the unequal pitch coil pulling is an unequal pitch coil spring in which coarse winding portions and dense winding portions are alternately formed.
　液体噴出ポンプを使用する際、静置した状態から、押下ヘッドが動き出すまでの作動初期において、小さい力で押下ヘッドを押し下げることができるため、女性、子供、高齢者等、指の力が弱い使用者でも容易に押下ヘッドを押し下げて、内容物を噴出することができる。 When using a liquid ejection pump, the pressing head can be pushed down with a small force in the initial stage of operation until the pressing head starts moving from a stationary state. Even a person can easily push down the pressing head to eject the contents.
　また、内容物を噴出し終わった後、押下ヘッドが元の位置に戻るまでの復元過程においては十分な反発力が発揮され、内容物を確実にシリンダに吸い上げることができ、たとえ粘度の高い内容物であっても、所定量を繰り返し噴出することが可能となる。 In addition, a sufficient repulsive force is exerted in the restoration process until the pressing head returns to the original position after the contents have been ejected, and the contents can be sucked up into the cylinder reliably, even if the contents are highly viscous. Even if it is a thing, it becomes possible to eject a predetermined amount repeatedly.
容器に液体噴出ポンプを取り付けた状態図State diagram with liquid jet pump attached to the container 液体噴出ポンプの構造図Structure of liquid jet pump 不等ピッチコイルスプリングの外観図((ａ)第１の実施形態、(ｂ)第２の実施形態、(ｃ)第３の実施形態)External view of unequal pitch coil springs ((a) first embodiment, (b) second embodiment, (c) third embodiment) 不等ピッチコイルスプリングの押圧変化を示すグラフGraph showing change in pressure of unequal pitch coil spring テーパコイルスプリングの外観図(第４の実施形態)External view of taper coil spring (fourth embodiment) その他の非線形特性コイルスプリングの外観図((ａ)円錐型コイルスプリング(第５の実施形態)、(ｂ)鼓型コイルスプリング(第６の実施形態)、(ｃ)樽型コイルスプリング(第７の実施形態)、(ｄ)釣り鐘型コイルスプリング(第８の実施形態))Appearance of other nonlinear characteristic coil springs ((a) conical coil spring (fifth embodiment), (b) drum coil spring (sixth embodiment), (c) barrel coil spring (seventh embodiment) Embodiment), (d) bell-shaped coil spring (eighth embodiment)) 液体噴出ポンプの押下ヘッドの押圧変化を示すグラフGraph showing pressure change of pressing head of liquid jet pump
　本発明の液体噴出ポンプを以下に詳細に説明する。 The liquid jet pump of the present invention will be described in detail below.
　液体噴出ポンプは、液体の内容物を収容する容器(１)の口部に装着し内容物をポンプ機構により容器内から吸い上げ、ノズルから噴出する液体噴出ポンプである(図１)。シリンダ(３)の上端部は装着キャップ(10)と連結しており、装着キャップを容器(１)の口部に取り付けることにより、シリンダは容器の内部に設置され、シリンダの底部に取り付けた吸上げパイプ(11)を通して内容物をシリンダ内に吸い上げることができる。容器に収容される内容物は、液体だけに限られず、ポンプ機構により吸い上げることができる流動性を有する性状であればよく、例えば、クリーム、ジェルなどであってもよい。 The liquid jet pump is a liquid jet pump that is attached to the mouth of the container (1) that contains the liquid contents, sucks the contents from the container by a pump mechanism, and jets them from the nozzle (FIG. 1). The upper end of the cylinder (3) is connected to the mounting cap (10). By attaching the mounting cap to the mouth of the container (1), the cylinder is installed inside the container and is attached to the bottom of the cylinder. The contents can be sucked into the cylinder through the raising pipe (11). The contents stored in the container are not limited to liquids, but may be any fluid property that can be sucked up by a pump mechanism, and may be, for example, cream or gel.
　液体噴出ポンプは、図２に示すように、容器内から吸い上げた内容物を貯蔵するシリンダ(３)と、コイルスプリング(４)により上方付勢状態で上下動可能に前記シリンダ上方に起立したステム(５)と、該ステムに連係し前記シリンダ内に上下摺動自在に配設されたピストン(６)と、前記ステムの上端部に装着され該ステム内に連通するノズル(７)が形成された押下ヘッド(８)と、を備えている。図２では、ステム(５)は、上ステム(5a)と下ステム(5b)を軸線方向に連結して構成された例を示しているが、ステム(５)は一体的に成形することも可能であり、また、本発明において上ステム(5a)と下ステム(5b)との機能上の相違もないことから、上ステム(5a)と下ステム(5b)を連結したものを単にステム(５)と称して説明する。 As shown in FIG. 2, the liquid jet pump has a cylinder (3) for storing the contents sucked up from the container, and a stem that stands up above the cylinder so as to move up and down in an upward biased state by a coil spring (4). (5), a piston (6) linked to the stem and slidably arranged in the cylinder, and a nozzle (7) attached to the upper end of the stem and communicating with the stem. And a pressing head (8). FIG. 2 shows an example in which the stem (5) is configured by connecting the upper stem (5a) and the lower stem (5b) in the axial direction, but the stem (5) may be formed integrally. In addition, since there is no functional difference between the upper stem (5a) and the lower stem (5b) in the present invention, a combination of the upper stem (5a) and the lower stem (5b) is simply a stem ( 5) and will be described.
　ポンプ機構部(12)は、シリンダ(３)とピストン(６)から構成される。シリンダ(３)は、容器の口部を閉止する装着キャップ(10)から垂設され、下部には容器内底部に延び出す吸上げパイプ(11)が連接されている。ポペット弁体(９)は、シリンダ(３)内部に上下動可能に配され、ポペット弁体(９)下端部とシリンダ(３)の底部内面との間で吸込弁(13)を形成する。ステム(５)はシリンダ(３)から上方に延び出し、下部一側に連通孔(14)が開口しており、下端内周壁が前記ポペット弁体(９)の外面に摺接し、液体噴出時に押し下げられるときポペット弁体(９)がステム(５)内に入り込むことにより、ステム(５)底面とポペット弁体(９)側面とシリンダ(３)内側面で囲まれた領域の容積が縮小される。図２はピストン(６)がストッパー部(15)に当接して上限位置にあり、連通孔(14)はピストン(６)で閉止されている。 The pump mechanism (12) is composed of a cylinder (3) and a piston (6). The cylinder (3) is suspended from a mounting cap (10) for closing the mouth of the container, and a suction pipe (11) extending to the bottom of the container is connected to the lower part. The poppet valve body (9) is disposed inside the cylinder (3) so as to be movable up and down, and forms a suction valve (13) between the lower end of the poppet valve body (9) and the inner surface of the bottom of the cylinder (3). The stem (5) extends upward from the cylinder (3), and a communication hole (14) is opened on one side of the lower part. The inner peripheral wall of the lower end is in sliding contact with the outer surface of the poppet valve body (9). When the poppet valve body (9) enters the stem (5) when pushed down, the volume of the region surrounded by the bottom surface of the stem (5), the side surface of the poppet valve body (9), and the inner surface of the cylinder (3) is reduced. The In FIG. 2, the piston (6) is in the upper limit position in contact with the stopper portion (15), and the communication hole (14) is closed by the piston (6).
　押下ヘッド(８)を介してステム(５)を押し下げると、ポペット弁体(９)が下降して吸込弁(13)を閉弁するとともに、ピストン(６)により閉塞されていた連通孔(14)が開放される。その後ピストン(６)がステム(５)に追随して下降し、シリンダ(３)内を加圧するので、この加圧液はステム(５)の空隙(16)から連通孔(14)、ステム(５)内を経てノズル(７)より外部に噴出される。押下ヘッド(８)の押し下げ時に、ポペット弁体(９)とステム(５)と間に張設されたコイルスプリング(４)が圧縮されて弾性反発力が蓄積される。液体の噴出完了後、押下ヘッド(８)への押下力を除くと、前記弾性反発力により、押下ヘッド(８)が上昇し図２の状態に復帰する。 When the stem (5) is pushed down via the pressing head (8), the poppet valve body (9) is lowered to close the suction valve (13), and the communication hole (14 ) Is released. After that, the piston (6) descends following the stem (5) and pressurizes the inside of the cylinder (3), so that the pressurized liquid flows from the gap (16) of the stem (5) to the communication hole (14) and the stem ( 5) It goes out from the nozzle (7) through the inside. When the pressing head (8) is pushed down, the coil spring (4) stretched between the poppet valve body (9) and the stem (5) is compressed and the elastic repulsive force is accumulated. When the pressing force to the pressing head (8) is removed after the liquid ejection is completed, the pressing head (8) is raised by the elastic repulsive force and returned to the state shown in FIG.
　コイルスプリング(４)の上端部は、ステム(５)の底面に当接するとともに、ステム(５)底面から連なる部分により径方向の外側から支持されている。またコイルスプリング(４)の下端部は、ポペット弁体の側面から水平方向に延び出すフランジ部(9a)の上面に当接するとともに、シリンダ(３)の内側面により径方向の外側から支持されている。コイルスプリング(４)は、ステム(５)底面とフランジ部(9a)上面により上下方向に挟み込まれ、ステム(５)を上方向に付勢した状態で支持している。尚、コイルスプリングを配置する位置や取り付け方法は、これに限定されるものではなく、ステム(５)を上方に付勢し得るものであれば広く採用することができる。 The upper end portion of the coil spring (4) is in contact with the bottom surface of the stem (5) and is supported from the outside in the radial direction by a portion continuous from the bottom surface of the stem (5). The lower end portion of the coil spring (4) is in contact with the upper surface of the flange portion (9a) extending in the horizontal direction from the side surface of the poppet valve body, and is supported from the radially outer side by the inner surface of the cylinder (3). Yes. The coil spring (4) is sandwiched between the bottom surface of the stem (5) and the top surface of the flange portion (9a) and supports the stem (5) in a state of being biased upward. The position where the coil spring is disposed and the attachment method are not limited to this, and can be widely used as long as the stem (5) can be biased upward.
　本発明の液体噴出ポンプは、コイルスプリングを非線形特性コイルスプリングとすることを特徴とする。非線形特性は、バネ定数に関して少なくとも大小２つの数値を備え、変形量が所定の閾値を超えたときに小さい数値から大きい数値にバネ定数が切り替わるようにしたり、バネ定数を収縮量に対して連続的に変化させることにより得ることができる。非線形特性コイルスプリングを用いることにより、静置状態から動き出すまでの作動初期には押下ヘッドの作動を軽くできる一方、内容物を噴出し終わった後、押下ヘッドが元の位置に戻るまでの復元過程においては十分な反発力が発揮され、内容物を確実にシリンダに吸い上げることが可能となる。 The liquid jet pump of the present invention is characterized in that the coil spring is a non-linear characteristic coil spring. The non-linear characteristic has at least two numerical values for the spring constant, and when the deformation amount exceeds a predetermined threshold, the spring constant is switched from a small value to a large value, or the spring constant is continuously changed with respect to the contraction amount. It can be obtained by changing. By using a non-linear characteristic coil spring, the operation of the pressing head can be lightened at the beginning of the operation from the stationary state to the start of movement, while the restoration process until the pressing head returns to its original position after the contents have been ejected In this case, a sufficient repulsive force is exerted, and the contents can be surely sucked into the cylinder.
　非線形特性コイルスプリングとしては、不等ピッチコイルスプリング、テーパコイルスプリング、円錐型コイルスプリング、鼓型コイルスプリング、樽型コイルスプリング、釣り鐘型コイルスプリングを用いることができる。また、これらを組み合わせることにより、適切な非線形特性を備えたコイルスプリングを得ることもできる。 As the non-linear characteristic coil spring, an unequal pitch coil spring, a taper coil spring, a conical coil spring, a drum coil spring, a barrel coil spring, and a bell coil spring can be used. Moreover, the coil spring provided with the appropriate nonlinear characteristic can also be obtained by combining these.
　図３に不等ピッチコイルスプリングの例を示す。不等ピッチコイルスプリングは、縮み始めの段階では、ピッチが小さい密巻部が主に収縮し、密巻部の収縮が終了すると、次に、粗巻部が収縮するため、スプリングの収縮過程の初期とそれ以降とでスプリングの弾性反発力を調整することが可能となる。 Fig. 3 shows an example of an unequal pitch coil spring. In the unequal pitch coil spring, the densely wound portion having a small pitch mainly contracts at the beginning of contraction, and after the densely wound portion contracts, the coarsely wound portion contracts next. It becomes possible to adjust the elastic repulsive force of the spring in the initial stage and thereafter.
　本発明の液体噴出ポンプに用いる不等ピッチコイルスプリングとしては、コイルスプリングの全長に対し４０～８０％の長さ分を粗巻部で構成し、２０～６０％の長さ分を密巻部で構成することが好適である。そして、粗巻部のスプリングのピッチ(隣り合う線の中心から中心の距離)を２～６ｍｍとした場合、密巻部のピッチは、粗巻部のピッチの４０～７５％の長さとすることが好ましく、更には、４０～６０％とすることが好ましい。また、吐出量に応じて反発力を調整するため、スプリングの線径には種々のバリエーションがあるが、０．６～０．９ｍｍφの範囲のものを用いることが好ましい。 As the unequal pitch coil spring used in the liquid jet pump of the present invention, the length of 40 to 80% of the total length of the coil spring is composed of a rough winding portion, and the length of 20 to 60% is a dense winding portion. It is preferable to comprise. When the pitch of the spring of the coarsely wound portion (distance from the center of the adjacent line) is 2 to 6 mm, the pitch of the densely wound portion is 40 to 75% of the pitch of the coarsely wound portion. More preferably, it is preferably 40 to 60%. Further, in order to adjust the repulsive force according to the discharge amount, there are various variations in the wire diameter of the spring, but it is preferable to use a spring in the range of 0.6 to 0.9 mmφ.
　化粧品などの用途に広く用いられる一般的なサイズの液体噴出ポンプに、このようなコイルスプリングを組み込むことにより、静置状態から押下ヘッドが動き出すまでの作動初期においては、押下ヘッドを軽く押し下げることができ、一方、内容物を噴出し終わった後、押下ヘッドが元の位置に戻るまでの過程においては、たとえ粘度が高い内容物であっても、容器内からシリンダ内に確実に内容物を吸い上げることが可能となる。尚、コイルスプリングの全長は、液体噴出ポンプ内のコイルスプリングを設置する空間の長さの１１０～１６０％の長さとすることが好ましい。コイルスプリングを押し縮めた状態で液体噴出ポンプ内に設置することにより、使用後は押下ヘッドを元の位置まで確実に押し戻すことが可能となる。 By incorporating such a coil spring into a liquid jet pump of a general size that is widely used for cosmetics and other applications, the pressing head can be pushed down lightly in the initial stage of operation from the stationary state until the pressing head starts to move. On the other hand, in the process until the pressing head returns to the original position after the ejection of the contents, even if the contents are highly viscous, the contents are surely sucked into the cylinder from the container. It becomes possible. The total length of the coil spring is preferably 110 to 160% of the length of the space in which the coil spring in the liquid jet pump is installed. By installing the coil spring in the liquid jet pump in a compressed state, the pressing head can be surely pushed back to the original position after use.
　不等ピッチコイルスプリングと通常の等ピッチのコイルスプリングについて、収縮量(ストロークの長さ)に対する押圧の変化を図４に示す。不等ピッチコイルスプリングは、ストローク０～３ｍｍでは通常のコイルスプリングと同じ押圧を示すが、ストローク４ｍｍ付近から通常のコイルスプリングより強い押圧となり、非線形特性を示す。不等ピッチコイルスプリングは粗巻部と密巻部の構成を変えることにより、ストロークの長さに対する押圧を適宜調整することができる。 Fig. 4 shows changes in pressure with respect to the amount of contraction (stroke length) for an unequal pitch coil spring and a normal equal pitch coil spring. The non-uniform pitch coil spring exhibits the same pressure as a normal coil spring at a stroke of 0 to 3 mm, but becomes stronger than a normal coil spring from a stroke of about 4 mm, and exhibits non-linear characteristics. The unequal pitch coil spring can appropriately adjust the pressure against the stroke length by changing the configuration of the coarsely wound portion and the densely wound portion.
　不等ピッチコイルスプリングは、図３(ａ)に示すように、一端側にピッチが大きい粗巻部を形成し、他端側にピッチが小さい密巻部を形成することができる。粗巻部から密巻部へのピッチの変化は連続的であっても、段階的であってもよい。また、粗巻部や密巻部においてもスプリングのピッチを変化させることができ、その変化は連続的であっても段階的であってもよい。 As shown in FIG. 3A, the unequal pitch coil spring can form a coarsely wound portion with a large pitch on one end side and a densely wound portion with a small pitch on the other end side. The change in pitch from the coarsely wound portion to the densely wound portion may be continuous or stepwise. Further, the pitch of the spring can be changed also in the coarsely wound portion and the densely wound portion, and the change may be continuous or stepwise.
　また不等ピッチコイルスプリングは、粗巻部と密巻部とを交互に形成したものを用いることができる。図３(ｂ)は、スプリングの両端部に配した粗巻部の間に密巻部を配した実施形態を示す。また図３(ｃ)は、スプリングの両端部に密巻部を配し、２つの密巻部の間に粗巻部を配した実施形態を示す。 Further, as the unequal pitch coil springs, those in which coarse winding portions and dense winding portions are alternately formed can be used. FIG. 3B shows an embodiment in which densely wound portions are disposed between the coarsely wound portions disposed at both ends of the spring. FIG. 3C shows an embodiment in which densely wound portions are disposed at both ends of the spring, and a coarsely wound portion is disposed between the two closely wound portions.
　図５に、テーパコイルスプリングの例を示す。テーパコイルスプリングとは、スプリングの線径が均一でなく、テーパ状になったものをいう。テーパコイルスプリングを用いることにより、収縮量に対してバネ定数を連続的に変化させることができる。 Fig. 5 shows an example of a taper coil spring. The taper coil spring refers to a spring in which the wire diameter is not uniform but is tapered. By using the taper coil spring, the spring constant can be continuously changed with respect to the contraction amount.
　図６に、(ａ)円錐型コイルスプリング、(ｂ)鼓型コイルスプリング、(ｃ)樽型コイルスプリング、(ｄ)釣り鐘型コイルスプリングの例を示す。コイルの直径が大きい部分はバネ定数が小さく、コイルの直径が小さい部分はバネ定数が大きいことから、このようなコイルスプリングを用いれば、収縮量に対してバネ定数を連続的に変化させることができる。 FIG. 6 shows examples of (a) conical coil springs, (b) drum coil springs, (c) barrel coil springs, and (d) bell-shaped coil springs. Since the spring constant is small in the portion where the coil diameter is large and the spring constant is large in the portion where the coil diameter is small, the spring constant can be continuously changed with respect to the contraction amount by using such a coil spring. it can.
　本発明の液体噴出ポンプについて行った測定試験およびアンケート結果を実施例として記載する。 Measured tests and questionnaire results conducted on the liquid jet pump of the present invention will be described as examples.
　図７は、不等ピッチのコイルスプリングを組み込んだ本発明の液体噴出ポンプと、等ピッチのコイルスプリングを組み込んだ従来の液体噴出ポンプの押圧の変化を示す。グラフは、押圧測定器(オートグラフ)を用いてストロークに対する押し圧(Ｎ)の変化を計測した結果を示すものであるが、測定器の治具が０．５ｍｍストロークした時点で液体噴出ポンプの押下ヘッドが下降し始めるため、ストローク０．５～１ｍｍに示される押圧(Ｎ)が使用者が指に感じる押圧となる。グラフに示されるように、不等ピッチのコイルスプリングを組み込んだ液体噴出ポンプは初期(ストローク０．５～１ｍｍ)の押圧を低く抑えることができる一方、押し切った時点(ストローク約７．５ｍｍ)の押圧は、従来の液体噴出ポンプの押圧(Ｎ)に近い値であることが確認された。尚、測定に使用した不等ピッチのコイルスプリングは、全長２３ｍｍ、コイル外径７．３ｍｍ、線径０．７ｍｍ、粗巻部１６ｍｍ(全長に対して約７０％)、密巻部７ｍｍ(全長に対して約３０％)とし、粗巻部のピッチは２ｍｍ、密巻部のピッチは１ｍｍとしている。比較用の従来の等ピッチのコイルスプリングのピッチは２ｍｍである。 FIG. 7 shows a change in the pressure of the liquid jet pump of the present invention incorporating a coil spring of unequal pitch and the conventional liquid jet pump incorporating a coil spring of equal pitch. The graph shows the result of measuring the change in the pressing pressure (N) with respect to the stroke using a pressure measuring instrument (autograph). Since the pressing head starts to descend, the pressure (N) indicated by the stroke of 0.5 to 1 mm is the pressure felt by the user's finger. As shown in the graph, the liquid jet pump incorporating a coil spring with an unequal pitch can keep the initial pressure (stroke 0.5-1 mm) low, while at the time it is fully pushed (stroke about 7.5 mm). It was confirmed that the pressure was close to the pressure (N) of the conventional liquid jet pump. The coil springs of unequal pitch used for the measurement had a total length of 23 mm, a coil outer diameter of 7.3 mm, a wire diameter of 0.7 mm, a rough winding portion of 16 mm (about 70% of the total length), and a dense winding portion of 7 mm (full length). About 30%), the pitch of the coarsely wound portion is 2 mm, and the pitch of the closely wound portion is 1 mm. The pitch of a conventional equal pitch coil spring for comparison is 2 mm.
　また、本発明の液体噴出ポンプと従来の液体噴出ポンプとの使用テストによる比較試験を行ったところ、パネラー１０名全員より、本発明の液体噴出ポンプは従来の液体噴出ポンプに比べて初期の動作が軽く、操作性に優れるとの結果を得ることができた。 In addition, when a comparative test was conducted by a use test between the liquid ejection pump of the present invention and the conventional liquid ejection pump, all 10 panelists showed that the liquid ejection pump of the present invention operated at an early stage as compared with the conventional liquid ejection pump. Was light and excellent in operability.
　以上により、不等ピッチのコイルスプリングを組み込んだ本発明の液体噴出ポンプは、静置した状態から、押下ヘッドが動き出すまでの作動初期において、小さい力で押下ヘッドを押し下げることができる一方、内容物を噴出し終わった後、押下ヘッドが元の位置に戻るまでの復元過程においては十分な反発力が発揮されることが確認された。 As described above, the liquid jet pump of the present invention incorporating the coil springs of unequal pitch can push down the pressing head with a small force in the initial operation from the stationary state until the pressing head starts moving. It was confirmed that a sufficient repulsive force was exerted in the restoration process until the pressing head returned to the original position after the ejection of.
１　液体噴出ポンプ
２　容器
３　シリンダ
４　コイルスプリング
５　ステム
５ａ　上ステム
５ｂ　下ステム
６　ピストン
７　ノズル
８　押下ヘッド
９　ポペット弁体
９ａ　フランジ部
１０　装着キャップ
１１　吸上げパイプ
１２　ポンプ機構部
１３　吸込弁
１４　連通孔
１５　ストッパー部
１６　空隙
１７　粗巻部
１８　密巻部 DESCRIPTION OF SYMBOLS 1 Liquid jet pump 2 Container 3 Cylinder 4 Coil spring 5 Stem 5a Upper stem 5b Lower stem 6 Piston 7 Nozzle 8 Press head 9 Poppet valve body 9a Flange part 10 Installation cap 11 Suction pipe 12 Pump mechanism part 13 Suction valve 14 Communication hole 15 Stopper part 16 Gap 17 Coarse winding part 18 Close winding part

Claims (4)

  1. 　容器内から吸い上げた内容物を貯蔵するシリンダと、コイルスプリングにより上方付勢状態で上下動可能に前記シリンダ上方に起立したステムと、該ステムに連係し前記シリンダ内に上下摺動自在に配設されたピストンと、前記ステムの上端部に装着され該ステム内に連通するノズルが形成された押下ヘッドと、を備える噴出ポンプであって、前記コイルスプリングが、非線形特性コイルスプリングであることを特徴とする液体噴出ポンプ。 A cylinder for storing the contents sucked up from the inside of the container, a stem that can be moved up and down by a coil spring in an upwardly biased state, and a stem that is linked to the stem and slidable up and down in the cylinder An ejection pump comprising: a piston formed on the upper end of the stem; and a pressing head formed with a nozzle that communicates with the stem. The coil spring is a non-linear characteristic coil spring. And liquid jet pump.
  2. 　前記非線形特性コイルスプリングが、不等ピッチコイルスプリング又はテーパコイルスプリングであることを特徴とする請求項１記載の液体噴出ポンプ。 The liquid jet pump according to claim 1, wherein the non-linear characteristic coil spring is an unequal pitch coil spring or a taper coil spring.
  3. 　前記不等ピッチコイルスプリングが、一端側に粗巻部が形成され、他端側に密巻部が形成された不等ピッチコイルスプリングであることを特徴とする請求項２記載の液体噴出ポンプ。 3. The liquid jet pump according to claim 2, wherein the unequal pitch coil spring is an unequal pitch coil spring in which a coarsely wound portion is formed on one end side and a densely wound portion is formed on the other end side.
  4. 　前記不等ピッチコイルプリングが、粗巻部と密巻部とが交互に形成された不等ピッチコイルスプリングであることを特徴とする請求項２記載の液体噴出ポンプ。 3. The liquid jet pump according to claim 2, wherein the unequal pitch coil pulling is an unequal pitch coil spring in which coarse winding portions and dense winding portions are alternately formed.
PCT/JP2017/019896 2017-05-29 2017-05-29 Liquid ejection pump WO2018220671A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023065554A1 (en) * 2021-10-18 2023-04-27 富祥塑胶制品(上海)有限公司 Elastic member for liquid pump, liquid pump, and cosmetic container

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Publication number Priority date Publication date Assignee Title
JP3012183U (en) * 1994-10-05 1995-06-13 河野樹脂工業株式会社 dispenser
JP2001099207A (en) * 1999-09-28 2001-04-10 Toyo Seikan Kaisha Ltd Synthetic resin made coil spring, manufacturing method thereof, die used therefor and pump using the same
US20020003150A1 (en) * 1997-07-04 2002-01-10 Yannic Hermouet Hand-operated pump with a free floating sleeve piston
JP2008025619A (en) * 2006-07-18 2008-02-07 Toska Co Ltd Spiral component made of plastic material, and manufacturing therefor
WO2010050441A1 (en) * 2008-10-31 2010-05-06 株式会社吉野工業所 Push-down head for pump and push-down head type discharge pump
JP2011006113A (en) * 2009-06-26 2011-01-13 Taiki:Kk Wet sheet container for replacement in which wet sheet is stored, storage device for container and set of the same
JP2013520308A (en) * 2010-02-24 2013-06-06 アプター フランス エスアーエス Fluid dispenser member and fluid dispenser apparatus including the fluid dispenser member
WO2017050390A1 (en) * 2015-09-25 2017-03-30 Sca Hygiene Products Ab Pump for dispensing fluids

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3012183U (en) * 1994-10-05 1995-06-13 河野樹脂工業株式会社 dispenser
US20020003150A1 (en) * 1997-07-04 2002-01-10 Yannic Hermouet Hand-operated pump with a free floating sleeve piston
JP2001099207A (en) * 1999-09-28 2001-04-10 Toyo Seikan Kaisha Ltd Synthetic resin made coil spring, manufacturing method thereof, die used therefor and pump using the same
JP2008025619A (en) * 2006-07-18 2008-02-07 Toska Co Ltd Spiral component made of plastic material, and manufacturing therefor
WO2010050441A1 (en) * 2008-10-31 2010-05-06 株式会社吉野工業所 Push-down head for pump and push-down head type discharge pump
JP2011006113A (en) * 2009-06-26 2011-01-13 Taiki:Kk Wet sheet container for replacement in which wet sheet is stored, storage device for container and set of the same
JP2013520308A (en) * 2010-02-24 2013-06-06 アプター フランス エスアーエス Fluid dispenser member and fluid dispenser apparatus including the fluid dispenser member
WO2017050390A1 (en) * 2015-09-25 2017-03-30 Sca Hygiene Products Ab Pump for dispensing fluids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023065554A1 (en) * 2021-10-18 2023-04-27 富祥塑胶制品(上海)有限公司 Elastic member for liquid pump, liquid pump, and cosmetic container

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