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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WO
WIPO (PCT)
Prior art keywords
coil spring
stem
cylinder
liquid jet
jet pump
Prior art date
Application number
PCT/JP2017/019896
Other languages
French (fr)
Japanese (ja)
Inventor
佐藤 照雄
Original Assignee
株式会社資生堂
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社資生堂 filed Critical 株式会社資生堂
Priority to PCT/JP2017/019896 priority Critical patent/WO2018220671A1/en
Publication of WO2018220671A1 publication Critical patent/WO2018220671A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D83/00Containers or packages with special means for dispensing contents

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

Liquid jet pump

The present invention relates to a liquid ejection pump for ejecting liquid contained in a container.

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.

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.

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.

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.

Japanese Utility Model Publication No.7-13780

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.

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.

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.

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.

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.

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.

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.

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.

State diagram with liquid jet pump attached to the container Structure of liquid jet pump External view of unequal pitch coil springs ((a) first embodiment, (b) second embodiment, (c) third embodiment) Graph showing change in pressure of unequal pitch coil spring External view of taper coil spring (fourth embodiment) 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)) Graph showing pressure change of pressing head of liquid jet pump

The 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). 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.

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.

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).

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Measured tests and questionnaire results conducted on the liquid jet pump of the present invention will be described as examples.

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.

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.

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.

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. 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. 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. 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. 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)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/019896 WO2018220671A1 (en) 2017-05-29 2017-05-29 Liquid ejection pump

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Application Number Priority Date Filing Date Title
PCT/JP2017/019896 WO2018220671A1 (en) 2017-05-29 2017-05-29 Liquid ejection pump

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WO2018220671A1 true WO2018220671A1 (en) 2018-12-06

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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
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 Meck Mold:Kk 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 Meck Mold:Kk 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

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