JP3741332B2 - 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 jet pump, for example, as shown in FIG. 5, a fixed suction part X in which a cylinder 53 is fixed in a state where a lower end is suspended into the container body by a mounting cylinder 52 fitted to the outer periphery of the mouth / neck part 51 of the container body 50. And a movable ejection part Y having a push-down head 56 with a nozzle 55 fitted and fixed to the upper end of a stem 54 that is projected upward from the opening at the center of the upper end of the suction part. It is known that the liquid in the container is sucked up and down by the vertical movement of the nozzle and ejected from the nozzle 55, and can be screwed and locked to the fixed suction part X in a state where the movable ejection part Y is pushed down. ing.
[0003]
These also generally have an outside air introduction hole 57 formed above the cylinder 53. These outside air introduction holes 57 are used to introduce outside air into the container body that is negatively pressured as the liquid is reduced when the movable ejection portion Y is moved up and down to eject the liquid inside the container body. The configuration is such that outside air is introduced into the container body 50 through the outside air introduction hole 57 from the gap between the outer surface and the upper edge of the fixed suction portion.
[0004]
[Problems to be solved by the invention]
In this type of conventional container, the inside and outside of the cylinder 53 communicate with each other through the outside air introduction hole 57 in a state where the movable ejection portion Y is pushed down and screwed and locked. Therefore, if the container is accidentally tilted, etc., the liquid in the container will enter the cylinder 53 above the piston through the outside air introduction hole 57. If the container is used from that state, the liquid leaked above the piston will And the fixed suction part upper end opening edge may leak to the outside.
In addition, when using a container equipped with this type of pump, for example, it is often used in a water field such as a bathroom. At that time, a cylinder or the like is formed from the gap between the outer surface of the stem and the upper edge of the fixed suction portion by a shower or the like. There may be a problem that water enters the container through the inside through the outside air introduction hole.
[0005]
In view of the above, the present invention does not leak liquid from the inside of the container into the cylinder even when the container is tilted in the state where the movable ejection part is pushed down and locked when not in use. In this case, an excellent pump that can prevent the intrusion of liquid from the gap between the outer surface of the stem and the upper opening edge of the fixed suction part as much as possible and can be easily manufactured without significant structural changes compared to conventional containers. It is what we propose.
In addition, in the present invention, even if the liquid leakage of the seal portion due to damage during assembly or molding failure occurs in the closed cylinder member for achieving the above object, the liquid leaks to the outside of the container. The present invention proposes a pump that can prevent the leakage of liquid at least during the distribution of goods.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the pump according to the first aspect of the present invention has a cylinder 3 having an open air introduction hole a formed in the upper part thereof, the upper end part of which is protruded from the neck part 4 and the lower end is suspended in the body part 5. A fixed suction part A that is fixed to the container body 2 in a state of being held in place, and a push-down head 17 with a nozzle 16 is fitted on the upper end of a stem 15 that is urged upwardly from the upper end opening of the suction part. And a movable ejecting part B, which is configured to suck up the liquid in the container by the vertical movement of the movable ejecting part and eject it from the nozzle, and can be locked to the fixed suction part while the movable ejecting part is pushed down. In the ejection pump, a base tube portion 24 is provided that protrudes from the upper end opening of the fixed suction portion and has a gap for introducing outside air inside, and is fitted to the lower portion of the outer periphery of the stem so as to move up and down. Projecting from the bottom outer periphery of the base tube, A closed cylindrical member C comprising an annular sliding closed portion 25 fitted to the inner peripheral upper portion so as to be slidable in the vertical direction is provided, and the movable ejecting portion is placed on the upper portion of the movable ejecting portion when the movable ejecting portion shifts to the lowest locking state. The closed cylindrical member C is pushed down by the provided downward step b to shift to the closed state of the outside air introduction hole a, and the upward step d provided at the lower portion of the outer periphery of the stem when the movable ejection portion B shifts to the highest rise state. It is configured to keep the outside air introduction hole a open when the movable ejection part B moves up and down due to liquid ejection, and the movable air ejection part is held in the lowest position. In the state, the liquid jet pump is characterized in that the fixed suction part upper end opening edge is tightly sealed to the outer surface of the movable jet part above the downward step b.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The liquid jet pump 1 of the present invention includes a fixed suction part A and a movable jet part B, sucks up the liquid in the container body 2 by the vertical movement of the movable jet part and ejects it from the nozzle, and pushes down the movable jet part. This is an improvement of a so-called push-down head type liquid jet pump that is configured to be able to be locked to a fixed suction portion in a state where it is in a closed state.
[0008]
The fixed suction part A is fixed to the container body 2 with the upper end projecting from the mouth-and-neck part 4 and the lower end hanging down into the body part 5 with the cylinder 3 having an open air introduction hole a formed in the upper part. In the illustrated example, the fixed suction portion A includes the cylinder 3, the mounting cylinder member 6, and the ring cap 7.
[0009]
The cylinder 3 has a cylindrical shape with the upper and lower ends opened, and a flange is projected from the upper outer periphery. The lower end is reduced in diameter to form a fitting cylinder for fitting a pipe, and the upper end is fitted into the cylinder. The pipe 8 is suspended at the lower end of the container. A suction valve 9 is provided at the lower end of the cylinder.
[0010]
The mounting cylinder member 6 is configured by projecting a flange for mounting inwardly from the upper end of the mounting cylinder 10, and the flange is rotatably fitted to the upper surface of the flange of the cylinder 3. The ring cap 7 that is fitted prevents the slipping out and is provided so as to be rotatable with respect to the cylinder. Then, the lower end of the cylinder 3 is inserted and suspended in the container body, and the lower surface of the flange of the cylinder 3 is brought into contact with the upper surface of the container body neck through the packing and is pressed and locked by the flange of the mounting cylinder member 6. The ring cap 7 hangs a fitting cylinder 11 fitted to the outer periphery of the upper end of the cylinder wall of the cylinder 3 through an uneven means so that the lower part cannot be pulled out from the back surface of the ring-shaped top plate 12, and from the inner peripheral edge of the top plate 12, A guide tube 13 for penetrating the stem 15 is vertically suspended, and the outer surface of the guide tube 13 is tightly fitted to the inner surface of the upper portion of the cylinder so as not to rotate. Further, a peripheral wall 14 having a threaded outer periphery is provided below the outer peripheral edge of the top plate 12.
[0011]
In addition, the movable ejection part B has a configuration in which a push-down head 17 with a nozzle 16 is fitted to the upper end of a stem 15 that is protruded so as to be vertically movable in an upwardly biased state from the upper end opening of the fixed suction part A.
The stem 15 is a conduit that communicates with the inside of the cylinder and introduces the liquid therein into the push-down head 17 above. In the illustrated example, the stem 15 has a cylindrical shape with upper and lower ends opened, and a coil spring 18 at the lower end. The upper end of the guide cylinder 13 is projected upward so as to be movable up and down. An annular piston 19 having an outer peripheral edge slidably fitted to the inner surface of the cylinder 3 is provided on the outer periphery of the lower end. Furthermore, a discharge valve 20 is provided in the upper part inside.
[0012]
The push-down head 17 in the illustrated example has a vertical cylinder 21 fitted to the upper end of the stem suspended from the center of the back surface of the top wall 22 and a hanging wall 23 suspended from the peripheral edge of the top wall 22. A nozzle 16 having a base end opened at the top 21 is configured to project forward so as to be ejected. The lower part of the vertical cylinder 21 is reduced in diameter on the outer peripheral surface via a downward step b, the upper end of the stem is reduced, and the vertical cylinder is fitted and fixed to the outer surface of the reduced diameter part of the stem. The outer surface of the reduced diameter portion of the vertical cylinder at the lower part is configured to be flush with the outer surface of the stem.
[0013]
Further, a thread is provided around the lower surface of the inner surface of the hanging wall 23, and is engaged with the thread on the outer surface of the fitting cylinder 11 in a state where the head is pushed down, so that the fixed suction portion A can be locked. .
In the present invention, in this type of conventional pump, as shown in FIG. 1 or FIG. 3, the upper end portion protrudes from the upper end opening of the fixed suction portion, and a gap for introducing outside air is formed inside so that it can move up and down. A base cylinder part 24 fitted to the lower part of the outer periphery of the stem, and an annular sliding closing part 25 which protrudes from the lower part of the outer periphery of the base cylinder part and is fitted to the upper part of the inner periphery of the cylinder so as to be slidable up and down. A closed cylinder member C is provided.
[0014]
The closed cylinder member C is pushed down by the downward step b provided at the upper part of the movable ejection portion when the movable ejection portion transitions to the lowest lowered locking state, and moves to the closed state of the outside air introduction hole a. When the ejection part B shifts to the highest position, it is pushed up by the upward stepped part d provided at the lower outer periphery of the stem and shifts to the open state of the outside air introduction hole a, and the movable ejection part B moves up and down for liquid ejection. In some cases, the outside air introduction hole a is kept open.
[0015]
The upward stepped portion d in the illustrated example is formed at a predetermined position on the lower periphery of the stem 15 so as to be able to push up the lower surface of the base tube portion 24 of the closed tubular member C. The downward stepped portion b is a vertical portion of the push-down head 17. The upper surface of the base cylinder portion 24 of the closed cylinder member C is formed so as to be pressed down at a predetermined position on the outer periphery of the cylinder 21.
Then, when the movable ejecting portion B is pushed down from the most elevated state to be screwed and locked to the fixed suction portion A, the downward stepped portion b pushes down the upper surface of the base tube portion 24, and FIG. As shown in FIG. 4, the sliding closing portion 25 is pushed down to a position where the outside air introduction hole a is closed. Further, when releasing the screwing from that state and raising the movable ejection part B, the upward stepped part d pushes up the lower surface of the base cylinder part 24 and is formed on the lower surface of the guide cylinder 13 as shown in FIG. The sliding stepped portion 25 is pushed up until the upper edge of the sliding blocking portion 25 is locked. At this time, the portion is configured to be liquid-tightly sealed by pressing the upward stepped portion d to the lower surface of the base tube portion 24.
[0016]
Further, the movable ejecting portion B is configured to have a stroke of the movable ejecting portion B so that the upward stepped portion d and the downward stepped portion b do not come into contact with the base tube portion 24 when the movable ejecting portion B moves up and down during liquid ejection.
The sliding closing portion 25 can be slidable in the upper part of the cylinder 3 and various shapes can be adopted as long as the outside air introduction hole a is closed so as to be opened and closed. In the example shown in the figure, an upward and downward skirt-like part is projected upward and downward from the base end part, and the upper part of the inner periphery of the cylinder is expanded through a tapered part to lock the upward skirt-like part. It is configured so that the closed cylinder member C is not lowered more than necessary.
[0017]
By providing the closed cylinder member C, the outside air introduction hole a of the cylinder 3 is closed when the movable ejection part B is pushed down and locked, thereby preventing inadvertent liquid leakage from the container body 2 into the cylinder. When the movable ejecting part B is moved up and down to cause liquid to be ejected, the outside air introducing hole a is opened, and the outside air introducing hole a is opened from the gap between the stem 15 and the closed cylinder member C. In this way, the outside air is introduced into the negatively pressurized container body.
In addition, since the base tube portion 24 protrudes in the most elevated state of the movable ejection portion B during use, when the container equipped with the pump 1 is used in a water field, the water ejected from the shower or the like is particularly fixed to the stem 15. It is possible to prevent as much as possible from entering through the gap between the upper end opening edge of the suction part A.
[0018]
In the present invention, the upper end opening edge of the fixed suction portion is tightly sealed to the outer surface of the movable ejecting portion above the downward stepped portion b when the movable ejecting portion is in the lowest descending locked state. For example, in the embodiment shown in FIGS. 1 and 2, the inner peripheral edge of the top plate 12 of the ring cap 7 which is the upper end opening edge of the fixed suction portion A is closely fitted to the outer periphery of the vertical cylinder 21 above the downward stepped portion b. It is composed. Further, in the embodiment shown in FIGS. 3 and 4, the short cylinder portion 26 erected from the inner peripheral edge of the top plate 12 of the ring cap 7 is similarly tightly fitted.
An example of how to use the pump 1 configured as described above will be described. When the pump 1 is not used for storage, transportation, etc., the movable ejection part B as shown in FIG. At this time, the sliding closing portion 25 of the closing cylinder member C closes the outside air introduction hole a, and the inner peripheral edge of the ring cap top plate 12 is tightly sealed to the outer periphery of the vertical cylinder 21.
[0019]
In use, the push-down head 17 is rotated to remove the screw and raise it. At this time, the lower surface of the closed cylindrical member C is brought into contact with and locked up with the upward stepped portion d of the movable ejection portion, and the blockage of the outside air introduction hole a by the sliding closed portion 25 is released. Next, the push-down head is moved up and down several times to perform an initial operation, and the liquid in the container is introduced into the cylinder to make preparations. At this time, the closed cylinder member C is stopped at the highest lifted position.
Next, when the push-down head is pushed down, the pressurized liquid in the cylinder opens the discharge valve 20 and ejects from the nozzle 16 through the stem 15. Next, when the pressing of the head is released, the movable ejecting portion B is raised by the action of the coil spring 18 and the inside of the cylinder is negatively pressurized, so the discharge valve 20 is closed, and the liquid in the container is introduced by opening the suction valve 9.
Each of the above members is mainly formed of a synthetic resin, and a metal or a flexible elastomer can be used in combination as required.
[0020]
【The invention's effect】
As described above, the liquid jet pump according to the present invention has the above-described configuration, and in particular, the upper end protrudes from the upper end opening of the fixed suction portion, and a gap for introducing outside air is formed on the inner side so that it can move up and down. A base cylinder part 24 fitted to the lower part of the outer periphery of the stem, and an annular sliding closing part 25 which protrudes from the lower part of the outer periphery of the base cylinder part and is fitted to the upper part of the inner periphery of the cylinder so as to be slidable up and down. The closed cylinder member C is provided, and the closed cylinder member C is pushed down by the downward step b provided at the upper part of the movable ejection part when the movable ejection part shifts to the lowest lowered locking state, so that the outside air introduction hole a is closed. At the same time, when the movable ejection part B transitions to the highest rise state, it is pushed up by the upward stepped portion d provided at the lower part of the outer periphery of the stem and transitions to the open state of the outside air introduction hole a, and the movable ejection part B ejects liquid. When the air is moved up and down for Since it is configured to maintain, when the movable ejection part is pressed down compactly when not in use, liquid leakage from the container body into the cylinder will occur even if the container is accidentally tilted. As a result, there is no possibility of inconvenience such as liquid leaking from the upper end opening of the fixed suction portion during use.
[0021]
In addition, even if the closed cylinder member C has a molding failure at the time of molding or may be damaged at the time of assembling the pump, the outer surface of the movable ejection portion where the upper end opening edge of the fixed suction portion A is above the downward stepped portion b Therefore, it is possible to prevent liquid from leaking out of the container at least during the distribution of the product, and to prevent inconveniences such as reducing the value of the product.
Furthermore, since the opening portion at the upper end of the fixed suction portion A is narrowed by the closed cylindrical member C, it is possible to prevent the liquid from entering from the gap with the stem 15 as much as possible.
Further, since the outside air introduction hole a is completely opened at the time of use, it is possible to reliably introduce outside air accompanying the negative pressure of the attached container body.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of a liquid jet pump according to the present invention.
FIG. 2 is a longitudinal cross-sectional view of a movable ejection part push-down locked state of the same embodiment.
FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention.
FIG. 4 is a vertical cross-sectional view of the movable ejection part pushed down and locked in the same embodiment.
FIG. 5 is a cutaway side view of an essential part showing an example of a conventional pump.
[Explanation of symbols]
2 ... container body, 3 ... cylinder, 4 ... mouth neck, 5 ... body, 15 ... stem,
16 ... Nozzle, 17 ... Depressing head, 24 ... Base tube, 25 ... Sliding block,
A ... fixed suction part, B ... movable ejection part, C ... closed cylinder member, a ... outside air introduction hole,
b ... downward step, d ... upward step

Claims (1)

A fixed suction part A, which is fixed to the container body 2 with the upper end projecting from the mouth-and-neck part 4 and the lower end hanging down into the body part 5; A movable jetting part B in which a push-down head 17 with a nozzle 16 is fitted on the upper end of a stem 15 that is protruded so as to be vertically movable from the upper end opening of the suction part. In the liquid jet pump configured to suck up the liquid in the container body and eject it from the nozzle, and to be able to engage with the fixed suction part with the movable ejection part pushed down, the upper end protrudes from the upper end opening of the fixed suction part And a base cylinder portion 24 fitted to the lower outer periphery of the stem so as to be movable up and down with a gap for introducing outside air inside, and protruding from the lower outer periphery of the base cylindrical portion, and at the upper inner periphery of the cylinder Annular sliding closure fitted so that it can slide up and down 25, and when the movable spraying portion shifts to the lowest lowered locking state, the closed cylindrical member C is pushed down by the downward stepped portion b provided at the upper portion of the movable spraying portion, and the outside air introduction hole a When the movable ejection portion B transitions to the highest rise state, the movable ejection portion B is pushed up by the upward stepped portion d provided at the lower portion of the outer periphery of the stem to transition to the open state of the outside air introduction hole a, and the movable ejection portion B is configured to maintain the open state of the outside air introduction hole a when moving up and down for liquid ejection, and the fixed suction portion is fixed to the outer surface of the movable ejection portion above the downward stepped portion b in the state where the movable ejection portion is in the lowest lowered locking state A liquid jet pump characterized in that the upper end opening edge is closely sealed.

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