JPH10194318A - Liquid spout pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an outstanding liquid spout pump of a head push down type undergoing no liquid leakage from the inside of a vessel to the inside of a cylinder via outside air introduction hole even in the case where the vessel is fallen down with its movable spout portion depressed and engaged during no use time, and also having no danger of liquid to come in the inside of the vessel, even if liquid comes in from interstices between a stem and the upper end opening periphery of a stationary suction portion. SOLUTION: There are provided an outside air introduction hole (a) communicated to the inside of a vessel at the upper portion of a cylinder and a vent path hole (b) having its one end open to communicate with the outside at the cylinder inside surface of the introduction upper hole respectively, and there is also provided a blocking member C including an annular blocking portion 17 that circumferentially forms an annular space (d) in the middle portion of the upper and lower direction outer peripheral surface by being fitted in the inside of the cylinder, so that the pump is formed that only the outside air introduction conduit as the movable spout portion is depressed and engaged by the clogging member and the clogging member is movably engaged automatically during use for allowing the outside air introduction conduit and a vent path to communicate with each other via the annular space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid ejection pump.

[0002]

2. Description of the Related Art As a liquid ejection pump, for example, a fixed suction section in which a cylinder is fixed with a lower end of a mounting cylinder fitted to the outer periphery of the mouth and neck of a container body fixed to the inside of the container body, The upper end of the stem in which an annular piston whose outer peripheral edge is fitted to be slidable up and down is linked to the lower outer periphery so that the upper end of the stem is urged upward and downward from an opening at the center of the upper end of the fixed suction portion, and A movable ejection section to which a press-down head with a nozzle is fitted and fixed at the upper end, wherein the movable ejection section is configured so as to suck up the liquid in the container body by a vertical movement and eject the liquid from the nozzle, and the movable ejection section is pushed down. There is known a device which is configured to be capable of being screwed and locked to a fixed suction portion.

[0003] These are also generally provided with an outside air introduction hole communicating with the inside of the container at the upper portion of the cylinder. These external air introduction holes are used to introduce external air into the container, which becomes negative pressure as the liquid decreases, when the movable ejection part is moved up and down to eject the liquid inside the container. It is configured such that outside air is introduced into the container through the gap between the fixed suction portion upper end opening edge and the outside air introduction hole.

[0004]

In this type of conventional container, when the movable ejection portion is pushed down and screwed and locked,
The inside and outside of the cylinder communicate with each other via the outside air introduction hole. Therefore, if the container is accidentally knocked down, the liquid inside the container will enter the cylinder above the annular piston through the outside air introduction hole, and if the container is used from that state, the liquid leaking above the piston will be removed by the stem. There is a possibility that the inconvenience of leaking to the outside through a gap between the upper end edge of the fixed suction portion and the opening may occur.

[0005] When a container equipped with this type of pump is used, it is often used, for example, in a water place such as a bathroom. At that time, the outer surface of the stem and the upper opening edge of the fixed suction part are closed by a shower or the like. There is a possibility that the inconvenience that water infiltrates into the container from the outside air introduction hole through the cylinder through the gap may occur.

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 knocked down in a state where the movable ejection part is pushed down and locked when not in use, and also in a water place at the time of use. The present invention proposes a liquid ejection pump which can prevent the intrusion of liquid from the outside air introduction hole even when used, and can be easily manufactured without a significant change in structure as compared with a conventional container.

[0007]

In order to solve the above-mentioned problems, a liquid jet pump according to the present invention has a mounting cylinder 4 fitted around the mouth and neck 3 of a container body 2 with its lower end suspended in the container body. A fixed suction portion A in which the cylinder 5 is fixed in the retracted state, and an annular piston 6 slidably fitted to the inner surface of the fixed suction portion are linked to the lower portion of the outer surface so as to be vertically movable in an upwardly biased state. A movable jetting portion B in which a press-down head 8 is fitted and fixed to the upper end of the stem 7 so that the liquid in the container body is sucked up by the up and down movement of the movable jetting portion and is ejected from an ejection port of the head. In the liquid ejection pump which is configured to be able to be locked to the fixed suction portion while the ejection portion is pushed down, the fixed suction portion A suspends the fitting cylinder 13 fitted to the outer periphery of the upper end of the cylinder 5 from the lower surface. From the inner peripheral edge of the ring-shaped top plate 14 This is a fixed suction part A provided with a ring cap 9 having a screw cylinder 15 suspended from the upper end of the cylinder, and an external air introduction hole a for communicating with the container body is formed in the upper part of the cylinder. The other end of the ventilation path b having one end opened to the inner surface of the cylinder above the hole communicates with the outside, and is fitted to the inner surface of the cylinder to form an annular gap d at the center in the vertical direction on the outer peripheral surface. The outer peripheral surface is slidably fitted to the upper part of the inner surface of the cylinder, and a closing member C having a ring-shaped base portion 18 is provided on the inner peripheral edge of the annular closing portion 21 so as to be movable up and down. When shifting to the locked state of descending, the closing member C is pushed down by the downward step portion 19 provided on the upper portion of the movable ejection section, and the state shifts to the closed state of only the outside air introduction hole a, and the movable ejection section is in the highest state. Movable injection when moving to The closing member is pushed up by the upward step portion 20 provided at the lower portion of the protruding portion, and the state is shifted to the communication state of the outside air introduction hole a and the ventilation path b through the annular gap d, and in this state, the upper surface of the ring-shaped base 18 and The liquid ejection pump is characterized in that the lower end of the screw cylinder 15 is detachably engaged with the lower end of the screw cylinder 15 via the concave-convex engagement means.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. The liquid ejection pump 1 of the present invention
A fixed suction part A to which a cylinder 5 was fixed in a state where the lower end was suspended in a container body by a mounting cylinder 4 fitted to the outer periphery of the mouth and neck part 3 of the container body 2 was slidably fitted to the inner surface of the cylinder. A movable jetting portion B having a downwardly moving head B fitted and fixed to the upper end of a stem 7 provided with an annular piston 6 linked to a lower portion of the outer surface so as to be vertically movable in an upwardly biased state; A so-called push-down type liquid ejection pump has been improved in which the liquid in the container is sucked up and ejected from the ejection port of the head, and the movable ejection section is configured to be able to be locked to the fixed suction section while being pushed down. Things.

In the present invention, in this kind of conventional pump,
The fixed suction section A is a fixed suction section A having a specially configured ring cap 9 fitted and fixed to the upper end of the cylinder 5, and an external air introduction hole a communicating with the inside of the container body 2 above the cylinder 5. Is formed, and the other end opening of the ventilation path b having one end opened on the inner surface of the cylinder above the introduction hole is configured to communicate with the outside. Furthermore, a closing member C having a special configuration is provided to open and close the outside air introduction hole a and the ventilation path b.

By providing the closing member C, the external air introduction hole a of the cylinder 5 is closed when the movable ejection portion B is pressed down and locked, thereby preventing undesired leakage of the liquid from the container body 2 into the cylinder. In addition, when the movable ejection portion B is in the highest state in use and when the movable ejection portion is moved up and down to eject the liquid, the outside air introduction hole a and the air passage b are communicated, and the air passage b and the outside air introduction hole are communicated. It is configured such that outside air is introduced into the container that has been under negative pressure through a.

In the embodiment shown in FIGS. 1 and 2, a flange 10 for mounting on the upper surface of the mouth and neck of the container body is protruded from the outer surface of the upper portion of the cylinder 5 via packing or the like. Is formed in a thin portion which is depressed outward through a step portion. A number of vertical ridges are provided vertically on the inner surface of the thin portion, and a ring cap 9 is provided on the outer surface of the cylindrical wall above the flange 10. Engagement ridges are provided so as to protrude around and lock them so that they cannot come out.

The ring cap 9 has a fitting cylinder 13 fitted to the outer periphery of the upper end of the cylinder wall of the cylinder 5 hangs down from the back surface of the ring-shaped top plate 14, and has a cylinder upper end formed on the inner peripheral edge of the top plate 14. The threaded tube 15 is suspended vertically. Further, a peripheral wall is vertically provided from an outer peripheral edge of the top plate 14. In addition, an engagement concave groove for engaging with the engagement ridge is formed at the lower portion of the inner surface of the fitting cylinder 13 to prevent the escape from coming out. A plurality of vertical ridges project in the direction to prevent rotation.

An outside air introduction hole a is formed in the upper part of the cylinder below the flange 10, and an air passage b is formed in the upper part of the cylinder above the flange 10 by opening one end in a gap between the screw cylinder 15 and the cylinder. Has been established. The outside air introduction hole a
The ventilation path b may be provided one by one or a plurality of air passages b.

The closing member C is made of a resilient synthetic resin or elastomer or the like, and is fitted to the inner surface of the cylinder to form an annular gap d at the center in the vertical direction of the outer peripheral surface. The surface is slidably fitted to the upper portion of the inner surface of the cylinder, and a ring-shaped base 18 is extended from the inner peripheral edge of the annular closing portion 17 so as to be vertically movable.

The closing member C is pushed down by the downward step portion 19 provided above the movable ejection portion when the movable ejection portion B shifts to the lowest locking state, so that only the outside air introduction hole a is provided. When the movable jetting part shifts to the highest state when the movable jetting part shifts to the closed state, it is pushed up by the upward stepped portion 20 provided at the lower part of the movable jetting part, and the communication between the outside air introduction hole a and the ventilation path b through the annular gap d. Transition to the state, and
In this state, the upper surface of the ring-shaped base 18 and the lower end of the screw cylinder 15 are configured to be detachably engaged via the concave-convex engagement means.

Various methods can be adopted as the above-mentioned concave and convex engaging means, for example, engagement by a ridge and a concave groove formed on the sliding contact surfaces, or by a concave groove formed in the vertical direction and a closely fitting protrusion. Engagement and the like. In the present embodiment, the closing member C has an engagement cylindrical portion 21 having an engagement concave groove formed on the inner surface from the outer edge of the upper surface of the ring-shaped base portion 18 and a pressing member from the inner edge of the upper surface. An annular projection 22 is provided upright.
Further, the lower end of the screw cylinder 15 is formed in a thin fitting portion 15a whose inner surface is the same as the inner surface of the thread, and the fitting portion 15a is formed.
A small ridge that engages with the engagement groove is provided on the outer surface of a. In this embodiment, both the engagement of the engagement concave groove with the small protrusion and the close fitting of the fitting portion 15a with the annular recess between the engagement cylinder 21 and the annular projection 22 are performed. An uneven engagement means is employed.

The press-down head 8 has a vertical tube 23 fitted on the upper end of the stem vertically extending from the center of the rear surface of the top wall 24, and a nozzle 25 having a base end opened at the upper portion of the vertical tube 23 to be ejected forward. The movable jetting portion B in the pushed-down state is locked to the fixed suction portion A by screwing a thread provided on the upper portion of the outer surface of the vertical tube 23 onto the inner surface of the screw tube 15. It is configured to be possible.

The lower surface of the vertical cylinder 23 of the press-down head 8 is formed as a downward stepped portion 19 so that the annular projection 22 of the closing member C is formed.
The upper surface is configured to be able to be pushed down, and an upward stepped portion 20 is formed at a predetermined position below the outer surface of the stem 7 so that the lower surface of the ring-shaped base portion 18 of the closing member C can be pushed up.

When the movable ejecting portion B is pushed down from the highest state of the movable ejecting portion B to be screwed and locked to the fixed suction portion A, the downward step 19 is formed by the annular projecting portion of the ring-shaped base portion 18.
The upper surface 22 is pushed down, and as shown in FIG. 2, the annular closing portion 17 is pushed down to a position where only the outside air introduction hole a is closed. When the screwing is released from the above state and the movable ejection portion B is raised to the highest position by the upward biasing force, the upwardly directed step portion 20 pushes up the lower surface of the ring-shaped base portion 18, as shown in FIG. The screw 15 is pushed up until the fitting portion 15a of the screw tube 15 is fitted and locked between the engagement cylinder portion 21 and the annular projection 22 on the ring-shaped base portion 18. At this time, the outside air introduction hole a and the opening of the ventilation path b communicate with each other through the annular space d, and as a result, the inside of the container and the outside are configured to communicate with each other.

In addition, when the movable ejection portion B moves up and down during the ejection of the liquid, the liquid can be ejected satisfactorily by the stroke of the movable ejection portion B such that the downward step portion 19 does not come into contact with the ring-shaped base portion 18. doing.

Hereinafter, other portions of the present embodiment will be described. A suction valve 26 is provided in the lower part of the cylinder 5, and a pipe 27 having an upper end fitted below the suction valve 26 is suspended from the lower end of the container.

The mounting cylinder 4 is formed by projecting a mounting flange inwardly from the upper end thereof, and the flange is rotatably fitted on the upper surface of the flange 10 of the cylinder.
The ring cap 9 is provided rotatably with respect to the cylinder to prevent the ring cap 9 from coming off by the fitting cylinder 13.

The stem 7 is a conduit for communicating with the inside of the cylinder to introduce the liquid therein into the press-down head 8 above the stem 7. The stem 7 has a cylindrical shape with upper and lower ends opened, and has a coil sprink 28 , And is constantly urged upward, with the upper end protruding above the ring cap 9 so as to be vertically movable. A discharge valve 29 is provided above the inside.

An example of the use of the pump 1 configured as described above will be described.
The movable ejection portion B is screwed and locked as shown in FIG. At this time, the annular closing portion 17 of the closing member C closes only the outside air introduction hole a. Further, when used, the press-down head 8 is rotated to remove the screw connection, and the coil sprinkler 28
Is raised by the upward biasing force of At this time, the ring base
The upwardly projecting step 20 of the movable jetting portion abuts on the lower surface of 18 and pushes up, and the outside air introduction hole a and one end opening of the ventilation passage b communicate with each other through the annular gap d of the annular closing portion 17 to communicate with the inside of the container. External communication. Next, the movable ejection part is moved up and down several times to perform the initial operation, and the liquid in the container body is introduced into the cylinder to prepare. At this time, the closing member C is stopped at the uppermost position pushed up. Then, when the push-down head is pushed down, the pressurized liquid in the cylinder opens the discharge valve 29 and is ejected from the nozzle 25 through the stem 7. Next, when the pressure of the head is released, the movable spouting portion B rises by the action of the coil sprinkler 28, and the inside of the cylinder is reduced in pressure, so that the discharge valve 29 is closed, and the liquid in the container body is opened and introduced, and The outside air is introduced into the negative pressure container.

When the push-down head 8 is screwed and locked again, the downward step 19 of the head is formed by the annular projection 22 of the closing member C.
By pushing down the upper surface, only the original outside air introduction hole a is closed.

The above members are mainly formed of a synthetic resin, and if necessary, a metal or a flexible elastomer can be used in combination.

[0027]

As described above, the trigger type liquid jet pump according to the present invention has the above-described structure, and in particular, has a ring-shaped top plate having a fitting cylinder 13 fitted to the outer periphery of the upper end of the cylinder 5 suspended from the lower surface. 14 has a fixed suction part A provided with a ring cap 9 having a threaded tube 15 suspended from an upper end of the cylinder at a distance from the inner peripheral edge, and an external air introduction hole a for communicating with the container body is formed in the upper part of the cylinder. At the same time, the other end of the air passage b having one end opened to the inner surface of the cylinder above the introduction hole is communicated with the outside, and is fitted to the inner surface of the cylinder to form an annular space d at the center in the vertical direction of the outer peripheral surface. The outer peripheral surface of the annular closing portion 21 to be formed is slidably fitted to the upper portion of the inner surface of the cylinder, and a closing member C having a ring-shaped base 18 extending to the inner peripheral edge of the annular closing portion 21 is provided so as to be vertically movable. When the movable jetting part B When shifting to the stop state, the closing member C is pushed down by the downward step portion 19 provided at the upper part of the movable ejection part, and the state shifts to the closed state of only the outside air introduction hole a, and the movable ejection part shifts to the highest state. At this time, the closing member is pushed up by the upward step portion 20 provided at the lower portion of the movable ejection portion, and the state shifts to the communication state of the outside air introduction hole a and the ventilation path b through the annular space d, and in this state, the ring-shaped base portion
(18) Since the upper surface and the lower end of the screw tube 15 are configured to be detachably engaged with each other via the concave / convex engagement means, when not in use, when the movable ejection unit is pressed down and locked compactly, Even if the container is accidentally knocked down, there is no leakage of the liquid from the container body into the cylinder. As a result, there is no possibility that the liquid will leak from the upper end opening of the fixed suction part during use.

Further, since the outside air introduction path is closed by the closing member, even if water intrudes from the gap between the stem and the upper opening edge of the fixed suction section by a shower or the like, the water enters the container body. Water can be reliably prevented from entering, and there is no risk of inconvenience such as dilution of the stored liquid.

In use, the air passage and the outside air introduction passage can be completely communicated with each other by the annular space of the closing member, and compared with a structure in which the valve plate that closes the opening at one end is opened and communicated by air pressure. The outside air can be more reliably introduced.

Further, when the movable ejection part is pushed down and locked or when the movable ejection part rises from the pushed-down engagement state by the upward urging force, the communication between the outside air introduction hole and the air passage is automatically changed between the non-communication state. Since it can be performed, it is extremely convenient in handling.

Further, since the closing member pushed up to the highest position is engaged through the concave / convex engaging means, it slides on the stem when the movable ejection part for ejecting the liquid moves up and down. There is no danger of being inadvertently pushed down, and even if the stem and the inner surface of the ring-shaped base are formed relatively densely for the purpose of preventing the intrusion of the liquid, the risk of the inadvertent pushing down is extremely small.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a liquid ejection pump of the present invention.

FIG. 2 is a longitudinal sectional view of the movable ejection portion of the embodiment in a state where the movable ejection portion is pushed down and locked.

[Explanation of symbols]

2 ... container body, 3 ... mouth and neck, 4 ... mounting cylinder, 5 ... cylinder,
6 ... Annular piston, 7 ... Stem, 8 ... Press down head,
15: screw cylinder, 17: annular closing portion, 18: ring-shaped base portion, 19: downward step portion, 20: upward step portion, A: fixed suction portion, B: movable ejection portion, C: closing member, a: outside air introduction Hole, b ... vent,
d ... annular gap

Claims (1)

[Claims] 1. A fixed suction portion A in which a cylinder 5 is fixed in a state where a lower end thereof is hung down by a mounting cylinder 4 fitted on an outer periphery of a mouth and neck portion 3 of a container body 2, and an inner surface of the fixed suction portion. An annular piston 6 slidably fitted to the outer surface is linked to a lower portion of the outer surface so as to be vertically movable in an upwardly biased state.
Ejecting part B in which the press-down head 8 is fitted and fixed at the upper end of
The movable ejector is configured to suck up the liquid in the container body by the vertical movement of the ejector and eject it from the ejection port of the head, and to be capable of being locked to the fixed suction part with the movable ejector pressed down. In the liquid jet pump, the fixed suction part A is fitted on the outer periphery of the upper end of the cylinder 5.
A fixed suction unit A provided with a ring cap 9 having a threaded tube 15 suspended from an inner peripheral edge of a ring-shaped top plate 14 vertically suspended from a lower surface thereof and a screw cylinder 15 disposed above the cylinder. An outside air introduction hole a communicating with the outside hole is formed, and the other end of a ventilation path b having one end opened on the inner surface of the cylinder above the introduction hole is communicated with the outside. A closing member in which an outer peripheral surface of an annular closing portion 21 which forms an annular gap d at a central portion in the direction is slidably fitted to an upper portion of the inner surface of the cylinder, and a ring-shaped base 18 is extended to an inner peripheral edge of the annular closing portion 21. C is provided so as to be vertically movable, and when the movable ejection portion B shifts to the lowest locking state, the closing member C is pushed down by the downward step portion 19 provided above the movable ejection portion, so that only the outside air introduction hole a is provided. When it shifts to the closed state In addition, when the movable ejection part shifts to the highest state, the closing member is pushed up by the upward step portion 20 provided at the lower part of the movable ejection part, so that the outside air introduction hole a and the ventilation path b through the annular space d are connected. A liquid ejection pump, wherein the liquid ejection pump is configured such that the upper surface portion of the ring-shaped base portion 18 and the lower end portion of the screw cylinder 15 are detachably engaged with each other via the concave / convex engagement means in this state.