JP4215154B2 - Liquid jet pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid jet pump.
[0002]
[Prior art]
As a liquid ejection pump, it is mounted on the container body by fitting the mounting cap to the mouth and neck of the container body, and a jet with a nozzle on the upper end of the stem that protrudes from the upper end of the mounting cap so that it can be pushed down in an upward biased state. There is known an operation jetting portion having a head fitted thereto, configured to suck up the liquid in the container body mounted by the vertical movement of the operation jetting portion and to eject the liquid from the nozzle outlet.
[0003]
[Problems to be solved by the invention]
This type of pump may cause inconveniences such as the sprayed liquid splashing in different directions depending on the type of stored liquid, or the contents dripping from the tip and soiling the nearby floor.
[0004]
These main factors are that the liquid is hardened at the nozzle tip. In order to prevent this, conventionally, a cap is detachably attached to the nozzle tip. However, in such a pump, the removed cap must be placed or held in the hand, and the pump operation is troublesome and the removed cap may be lost. In view of such a situation, there has been proposed one in which a band integrally projecting from the ejection head is connected to a cap and the removed cap can be maintained in the ejection head via the band.
[0005]
In this case, there is no risk of the cap ejecting, and there is no inconvenience that it must be in hand, but since the strip is flexible and deformable, the removed cap is in an unstable state. There is an inconvenience that is held and becomes an obstacle when operating the pump. In addition, there is a drawback in that it is difficult to mount a cap whose movement is limited by a belt even when the cap is mounted.
[0006]
The present invention has been made in view of the above points, and it is difficult for the liquid to remain in the nozzle without attaching a cap, and as a result, the ejected liquid is scattered in a non-existing direction or remains in the nozzle. The present invention proposes an excellent liquid jet pump capable of preventing inconvenience such as dripping of liquid from the tip after use as much as possible.
[0007]
[Means for Solving the Problems]
The first means is configured as follows. That is, the suction nozzle A fitted to the container body 2 with the mounting cap 3 fitted to the neck 6 and the cylindrical nozzle 16 at the upper end of the stem 15 projecting from the suction section A so as to be pushed upward. And a liquid jet pump configured to suck up the liquid in the container body mounted by the vertical movement of the hydraulic jet part and eject the liquid from the jet outlet 18 of the nozzle 16. In this case, at least the inner surface of the tip of the nozzle 16 of the ejection head 17 was formed by a wall surface a having a high water repellency .
[0008]
The second means is configured as follows. That is, in the first means, a partition wall 25 that divides the inner surface of the tip of the nozzle 16 is provided .
Configured.
[0009]
The third means was configured as follows. That is, in the first means , the wall member a having a high water repellency can be obtained by fitting and fixing the cylindrical member 23 formed of a resin having a high water repellency to the inner surface of the tip of the cylindrical nozzle 16. Formed .
[0010]
The fourth means is configured as follows. That is, in the first means, the ejection head 17 suspends the vertical cylinder 20 fitted to the upper end of the stem 15 from the rear surface of the top wall and suspends the peripheral wall 22 from the peripheral portion of the top wall 21. And a main body 26 formed on the top wall 21 with a fitting recess 28 extending from the upper end of the vertical cylinder to the front part of the peripheral wall 22, and a top fitting cylinder that is liquid-tightly fitted in the upper end of the vertical cylinder 20 The base end is opened at 29, and the base end is fitted into the fitting recess 28, and the nozzle 16 is projected forward, and the nozzle member 27 is made of a resin with high water repellency. The wall surface a rich in water repellency was formed .
[0011]
The fifth means is configured as follows. That is, in the first means, the ejection head 17 suspends the vertical cylinder 20 fitted to the upper end of the stem 15 from the back surface of the top wall 21 and suspends the peripheral wall 22 from the peripheral portion of the top wall 21. And, it is a jet head projecting forward through the peripheral wall 22 through the cylindrical nozzle 16 having a base end opened at the upper part of the vertical cylinder 20, and the whole is formed of a resin rich in water repellency. The wall surface a rich in water repellency was formed .
[0012]
The sixth means is configured as follows. That is, in the first means, the water generating wall surface a of the ejection head 17 and other portions are formed by two-color molding .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
The liquid ejection pump 1 of the present invention is used by being mounted on a container body 2 and includes a suction part A and an operation ejection part B.
[0016]
The suction part A may be in the form of a suction part in a conventional pump of this type as long as the suction part A is provided with a cylinder fixed with the lower end of the suction part A suspended in the container body 2.
[0017]
In the illustrated example, the suction portion A includes a mounting cap 3, a cylinder 4, and a ring member 5. The mounting cap 3 is configured by extending a flange-shaped top plate 8 inwardly from the upper end edge of the peripheral wall 7 screwed to the outer periphery of the mouth neck portion 6 of the container body 2. The cylinder 4 has a bottomed cylindrical shape with an open upper end, and a flange 9 projecting from the upper outer periphery is placed on the upper surface of the neck 6 through a packing 10, and the upper surface of the flange 9 is attached to the mounting cap 3. By pressing and fixing with the top plate 8, the lower end is fixed to the container body 2 in a state where it is suspended in the container body 2. A known suction valve (not shown) is provided at the inner bottom of the cylinder 4 and a suction pipe 11 having an upper end fitted to the lower end of the cylinder is suspended downward.
[0018]
The ring member 5 has a ring-shaped top plate 13 extending outward from the upper end of the inner cylinder 12 fitted to the inner periphery of the upper end of the cylinder 4, and the outer cylinder 14 suspended from the outer periphery of the top plate is connected to the upper end of the cylinder 4. It is configured to fit on the outer periphery. Further, a thread is provided around the inner periphery of the inner cylinder 12 so that it can be screwed with a thread provided around the outer periphery of the vertical cylinder of the ejection head, which will be described later. It is configured so that it can be stopped.
[0019]
The working ejection part B includes a stem 15 projecting from the suction part A so as to be able to be pushed down in an upward biased state, and an ejection head 17 with a cylindrical nozzle 16 fitted to the upper end of the stem 15 and is moved up and down. As long as the liquid in the mounted container body 2 is sucked up to the suction part A and ejected from the ejection port 18 of the nozzle 16, various specific structures can be adopted. In the illustrated example, a piston (not shown) slidably fitted to the inner periphery of the cylinder 4 is linked to the lower end of the outer periphery of the stem 15, and a discharge valve 19 is provided in the upper part of the stem 15.
[0020]
The ejection head is formed by projecting a cylindrical nozzle communicating with the inside of the stem 15 to the front. In the illustrated example, the ejection head 17 has a vertical cylinder 20 fitted to the upper end of the stem 15 and a center of the back surface of the top wall 21. The peripheral wall 22 is suspended from the peripheral edge of the top wall 21, and the tip of the nozzle 16 whose base end is opened at the top of the vertical cylinder 20 extends through the peripheral wall 22 and protrudes outward. ing.
[0021]
In the present invention, in such a liquid jet pump 1, at least the inner surface of the tip of the nozzle 16 of the jet head 17 is formed of a wall surface a rich in water repellency. Fluorine resins represented by polytetrafluoroethylene, polyvinylidene fluoride, polytrifluoroethylene chloride and the like are preferably used as the resin for forming such a wall surface a having a high water repellency. However, the resin is not limited to this. A resin that satisfies the above requirements can be used.
[0022]
By forming such a wall surface a rich in water repellency, at least the liquid in the tip of the nozzle 16 is easily discharged to the outside, and the residual liquid in that part is reduced. Accordingly, it is possible to prevent inconveniences such as the residual liquid dripping and solidifying from the tip of the nozzle 16 in the shape of an ice column or narrowing the nozzle hole near the jet outlet 18.
[0023]
Various means can be adopted as means for forming at least the inner peripheral surface of the nozzle tip of the ejection head 17 with the wall surface a rich in water repellency. For example, as shown in FIG. 1, a cylindrical member 23 formed of a resin having high water repellency is fitted to the tip of the nozzle 16. In FIG. 1, the cylindrical member 23 has a cylindrical shape in which a flange portion 24 whose rear surface is in contact with and locked to the front end surface of the nozzle 16 extends from the front end edge, and is closely fitted to the inner periphery of the front end of the nozzle 16. Yes.
[0024]
Further, as shown in FIG. 3, the cylindrical member 23 may be provided with a partition wall 25 that divides the inner peripheral surface. By providing such a partition wall 25, the liquid remaining in this portion is prevented from leaking. That is, since the resin surface a rich in water repellency is provided, the liquid at the tip of the nozzle 16 is generally discharged from the jet port 18, but in the unlikely event that residual liquid is present, It is possible to prevent the liquid from inadvertently dripping by increasing the contact area with the liquid as much as possible. This is particularly effective when the diameter of the nozzle 16 is large. The partition wall 25 can be applied to the case where the entire nozzle described later is formed from a resin having a high water repellency, and also to the case where the entire ejection head 17 is formed from a resin having a high water repellency.
[0025]
As another method, the entire nozzle 16 may be made of a resin having high water repellency. The embodiment shown in FIGS. 4 to 7 shows one example, and the main body 26 and the nozzle member 27 constitute the ejection head 17. The main body 26 has a vertical cylinder 20 fitted to the upper end of the stem 15 suspended from the rear surface of the top wall 21 and a peripheral wall suspended from the peripheral edge of the top wall 21, and from the upper end of the vertical cylinder 20 to the front of the peripheral wall 22 A fitting recess 28 is formed in the top wall 21.
[0026]
The nozzle member 27 has a base end opened in a top fitting tube 29 that is liquid-tightly fitted in the upper end portion of the vertical tube 20, and the base end portion is fitted in the fitting recess 28 to the front. The nozzle 16 protrudes, and the nozzle member 27 is formed of a resin having a high water repellency, whereby the wall surface a having a high water repellency is formed.
[0027]
As another alternative, the entire ejection head 17 may be formed of a resin having a high water repellency. Specifically, in the embodiment of FIG. 1, the wall member a having a high water repellency is formed by forming the entire ejection head from a resin having a high water repellency in the embodiment of FIG. To do.
[0028]
In the present invention, the wall surface a rich in water generation and other portions of the ejection head 17 can be formed by two-color molding. This two-color molding is a kind of injection molding, and is a known means for integrally molding a molded product by injecting two types of resins all at once.
[0029]
As another embodiment of the present invention, at least the nozzle is formed of a flexible and elastic material. By configuring in this way, if the nozzle is handled after the liquid is ejected, even if there is a residual liquid in the nozzle, it can be easily discharged, and the liquid does not remain in the nozzle, thus preventing the above-mentioned disadvantages. Examples of the flexible and elastic material include soft synthetic resin and rubber, and a material that can be easily squeezed with a finger may be selected.
[0030]
As an example in which the nozzle is formed of this flexible and elastic material, there is an example in which the nozzle member 27 is formed of a flexible and elastic material in the shape of the embodiment shown in FIGS. . Further, as another example, there may be mentioned an ejection head 17 having a shape excluding the cylindrical member 23 in the shape of the embodiment of FIG. 1 formed of a flexible and elastic material.
[0031]
Each of the above members can be formed mainly using a synthetic resin unless otherwise specified, and can be formed using an elastomer, a metal, or the like as required.
[0032]
【The invention's effect】
As described above, the liquid jet pump of the present invention has the above-described configuration, so that the jet liquid hardly remains in the nozzle 16 due to the presence of the wall surface a rich in water repellency, and the liquid in the nozzle 16 is dried and solidified. Alternatively, it is possible to prevent inconvenience such as dripping and solidifying the liquid from the tip of the nozzle, and as a result, it is possible to prevent inconvenience such as splashing of the ejected liquid in the opposite direction. Moreover, even if there is residual liquid in the nozzle and solidifies, the solidified pieces are easily peeled off and are swept together at the next liquid ejection, and the inconvenience that the solids overlap on the solids can be prevented as much as possible. .
[0033]
In addition, in the case where the partition wall 25 that divides the inner surface of the tip of the nozzle 16 is provided, even if there is a residual liquid at the tip of the nozzle, the liquid can be prevented from dripping inadvertently. .
[0034]
Further, the wall surface a having a high water repellency is formed by fitting and fixing a cylindrical member 23 formed of a resin having a high water repellency to the inner surface of the tip of the cylindrical nozzle 16. Has the advantage that it can be easily manufactured using existing pumps, and can be formed using as little as possible generally expensive and water-repellent resin, so that it can be manufactured at low cost. It also has advantages.
[0035]
In addition, in the case where the nozzle 16 is formed of a resin having a high water repellency to form the wall surface a having a high water repellency, liquid hardly remains in the entire nozzle 16, Inconveniences such as drying and solidification of the liquid or dripping and solidifying from the tip of the nozzle in a stalactite form can be prevented even better, and as a result, the inconvenience such as splashing in an unexpected direction can be further improved. It can be prevented. Further, if the nozzle 16 and the main body 26 are formed in different colors, there is an advantage that other types of pumps can be easily manufactured.
[0036]
Furthermore, when the entire ejection head is formed of a resin having a high water repellency, the ejection head having the above-mentioned advantages can be formed in one part.
[0037]
Further, in the case where the wall surface a rich in water generation and other parts of the ejection head 17 are formed by two-color molding, the wall surface and other parts rich in water repellency are formed by one molding. Since it can be formed, there is an advantage that the manufacturing efficiency can be increased.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view showing an embodiment of the present invention.
FIG. 2 is a perspective view of the same embodiment.
FIG. 3 is a perspective view showing another example of the cylindrical member in the embodiment.
FIG. 4 is a partially cutaway side view showing another embodiment of the present invention.
FIG. 5 is a perspective view of the same embodiment.
FIG. 6 is an exploded perspective view of the ejection head of the same embodiment.
FIG. 7 is a plan view of the same embodiment.
[Explanation of symbols]
2 ... container body, 3 ... mounting cap, 6 ... mouth and neck, 15 ... stem, 16 ... nozzle,
17 ... Ejection head, 18 ... Ejection port, 20 ... Vertical cylinder, 21 ... Ejection head top wall,
22 ... Outer head peripheral wall, 23 ... Tube member, 25 ... Partition wall, 26 ... Main body, 27 ... Nozzle member,
28 ... fitting recess, 29 ... fitting cylinder, A ... suction part, B ... actuating ejection part,
a ... Wall with high water repellency

Claims (5)

A suction part A fitted to the container body 2 with the mounting cap 3 fitted to the mouth / neck part 6, and a jet with a cylindrical nozzle 16 on the upper end of the stem 15 protruding so as to be able to be pushed down from the suction part A in an upward biased state. In a liquid jet pump comprising a working jet part B to which a head 17 is fitted, and configured to suck up the liquid in the mounted container body by the vertical movement of the working jet part and eject the liquid from the jet outlet 18 of the nozzle 16 There are, provided with a partition wall 25 which divides the front end portion inner surface of the nozzle 16, the liquid jet pump at least the nozzle 16 tip inner surface, characterized in that formed by the wall surface a rich water repellency of the injection head 17. 2. The liquid according to claim 1 , wherein the wall surface a rich in water repellency is formed by fitting and fixing a cylindrical member 23 made of a resin rich in water repellency to the inner surface of the tip of the cylindrical nozzle 16. Spout pump. The ejection head 17 suspends the vertical cylinder 20 fitted to the upper end of the stem 15 from the back surface of the top wall, suspends the peripheral wall 22 from the peripheral edge of the top wall 21 , and extends from the upper end of the vertical cylinder to the front of the peripheral wall 22. The base end is opened to the main body 26 formed on the top wall 21 with the fitting recess 28 leading to the part, and the top fitting cylinder 29 liquid-tightly fitted in the upper end of the vertical cylinder 20 , and the base end parts constituted by the nozzle member 27 is protruded nozzle 16 forwardly fitted into the fitting recess 28 and the nozzle member 27 by forming a rich resin water-repellent, rich in water repellent 2. A liquid jet pump according to claim 1, wherein said liquid jet pump is formed with a wall surface a . The ejection head 17 suspends the vertical cylinder 20 fitted to the upper end of the stem 15 from the back surface of the top wall 21 , suspends the peripheral wall 22 from the periphery of the top wall 21 , and is based on the upper part of the vertical cylinder 20. The jet nozzle head has a cylindrical nozzle 16 with an open end that protrudes forward through the peripheral wall 22 and is formed entirely of water-repellent resin to form the water-repellent wall surface a. liquid jet pump according to claim 1 wherein formed by. 2. A liquid jet pump according to claim 1 , wherein said water jetting wall surface a and other portions of said jet head 17 are formed by two-color molding .

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