JPH10180154A - Liquid jet pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid jet pump for preventing the leakage of a liquid from inside a container in a cylinder through an air introduction hole even when the container is toppled down in the pressing-down engaged state of a movable jet section and also preventing the infiltration of the liquid from a clearance between a stem and an upper end opening edge of a fixing suction section in a pressing-down head type pump at the time of not using the pump. SOLUTION: An air introduction hole (a) communicating with the inside of a container formed on the upper section of a cylinder 5 and a ventilation passage (b) having one open end and communicating with the outside are formed on the cylinder inner face above the air inlet hole (a) respectively, and a blocking member (c) with an annular block section 21 forming peripherally an annular clearance (d) on a central section in the upper and down direction on the outer peripheral face by providing the component into the inner face of the cylinder 5 is provided, and the atmosphere introduction passage only is blocked automatically in the state of pressing-down engaged state of a movable jet section B, while the outer atmosphere introduction line comes automatically to communicate with the ventilation line (b) through the annular clearance at the time of use in the constitution of a liquid jet pump.

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, which is connected to the lower periphery by an annular piston whose outer peripheral edge is slidably fitted up and down, protrudes upward and downward from the opening at the center of the upper end of the suction part so as to be able to move up and down. A movable ejection section to which a press-down head with a nozzle is fitted and fixed, wherein the movable ejection section is moved up and down to suck up the liquid in the container and eject the liquid from the nozzle, and is fixed in a state where the movable ejection section is pushed down. There is known one configured to be capable of being screwed and locked to a 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 a space 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 leakage to the outside from the gap between the upper edge of the fixed suction portion and the opening edge 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 water may enter the container from the outside air introduction hole through the cylinder through the gap.

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. Liquid that can be prevented as much as possible from the gap between the outer surface of the stem and the upper opening edge of the fixed suction part when used, and that can be easily manufactured without significant structural changes compared to conventional containers. It proposes an ejection pump.

[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. Fixed suction unit A to which the cylinder 5 is fixed in the
A movable ejection portion B in which an annular piston 6 slidably fitted to the inner surface of the cylinder is linked to a lower portion of the outer surface, and a press-down head 8 is fitted and fixed to the upper end of a stem 7 movably provided in an upwardly biased state. 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 ejection pump, an outside air introduction hole a communicating with the container body is formed in the upper part of the cylinder, and the other end of a ventilation path b having one end opened in the cylinder inner surface above the introduction hole is communicated with the outside. To form an annular gap d at the center in the vertical direction of the outer peripheral surface by fitting the cylinder into the cylinder inner surface.
The outer peripheral surface is slidably fitted to the upper portion of the inner surface of the cylinder, and the upper end of the base tube portion 22 having the annular closing portion 21 integrally protruded from the lower portion of the outer surface is located above the gap between the upper edge of the stem and the upper end of the fixed suction portion. Is provided so as to be movable up and down, and when the movable ejection portion B shifts to the lowest locking state, the closing member C is pushed down by the downward step 23 provided above the movable ejection portion. The closing member is pushed up by the upward step portion 24 provided at the lower part of the movable ejection portion when the movable ejection portion shifts to the highest state while the closed member is shifted to the closed state of only the outside air introduction hole a, and the movable ejection portion passes through the annular gap d. A liquid ejection pump configured to shift to a communication state between the outside air introduction hole a and the ventilation path b and to maintain the communication state when the movable ejection portion moves up and down for ejecting the liquid. did.

[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,
An outside air introduction hole a communicating with the inside of the container body 2 is formed in the upper part of the cylinder 5 and the other end of a ventilation path b having one end opened in the cylinder inner surface above the introduction hole is communicated with the outside. I have.

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 outside air introduction hole a of the cylinder 5 is closed when the movable jetting portion B is pushed down and locked, so that undesired liquid leakage from the inside of the container body 2 into the cylinder is prevented. 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 to 3, a flange 9 for mounting on the upper surface of the mouth and neck of the container body is provided via a packing or the like from the outer surface of the upper part of the cylinder 5, and the upper part of the cylinder below the flange is provided on the upper part of the cylinder. An outside air introduction hole a is provided. Also,
The air passage b in this embodiment is formed by a concave groove provided at the upper end of the cylinder and a ring cap 10 fitted to the upper end of the cylinder.

In this embodiment, the inner surface of the upper end portion of the cylinder 5 is formed in a thin portion which is depressed outward through a step, and a number of vertical ridges 11 are provided vertically on the inner surface of the thin portion. A ring cap 10 on the outer surface of the cylinder wall above the flange 9
An engaging ridge 12 is provided to lock the lock so that it cannot escape. In addition, a vertical groove 13 extending from the upper surface of the step portion to the upper side of the outside air introduction hole a is formed, and an inverted L-shaped groove 14 extending from the upper surface of the cylinder to the lower surface of the engaging ridge 12 on the outer surface is formed. I have.

The ring cap 10 has a fitting tube 15 fitted to the outer periphery of the upper end of the cylinder wall of the cylinder 5, which is vertically extended from the back surface of the ring-shaped top plate 16, and a sealing cylinder which is vertically extended from the lower surface inside the top plate 16. 17 The outer surface is closely fitted to the inner surface of the upper part of the cylinder. Further, a screw cylinder 18 for locking the movable ejection portion B is provided vertically from the outer peripheral edge of the top plate 16. In addition, an engagement concave groove 19 that engages with the engagement ridge 12 is formed at the lower portion of the inner surface of the fitting cylinder 15 to prevent slipping out, and the upper portion of the outer surface of the seal cylinder 17 is engaged with the vertical protrusion 11. A plurality of vertical ridges 20 in the circumferential direction are provided to protrude to prevent rotation. When the ring cap 10 is mounted, the opening of the vertical groove 13 is covered with the seal cylinder 17 except for the lower end thereof, and the inverted L-shaped groove is formed by the top plate 16 and the fitting cylinder 15. The air passage b is formed by covering the opening.

The air passage b is not limited to the above-described structure, but may be configured as shown in FIG. 4, for example. In the embodiment shown in FIG. 4, instead of the above-mentioned inverted L-shaped groove, a front end is provided above the above-mentioned vertical groove 13 and a through-hole 33 is provided to penetrate the front and rear. 13 together form an air passage b. Further, the outside air introduction hole a and the ventilation path b may be provided one by one or a plurality of them.

The closing member C is fitted to the inner surface of the cylinder to form an annular gap d in the center of the outer peripheral surface in the vertical direction.
The outer peripheral surface of an annular closing portion 21 forming a circumference is slidably fitted to the upper portion of the inner surface of the cylinder, and the upper end of a base cylinder portion 22 integrally projecting the annular closing portion 21 from the lower portion of the outer surface is formed on the upper end of the stem and the fixed suction portion. It is configured to protrude upward and downward from the gap with the opening edge.

The closing member C is pushed down by the downward step 23 provided above the movable jetting portion when the movable jetting portion B shifts to the lowermost locked state, so that the outside air is introduced. While shifting to the closed state of only the hole a,
When the movable ejection portion shifts to the highest state, the closing member is pushed up by the upward step portion 24 provided at the lower portion of the movable ejection portion, and a transition is made to a communication state of the outside air introduction hole a and the air passage b through the annular space d. In addition, the communication state is maintained when the movable ejection part moves up and down for ejecting the liquid.

In this embodiment, the press-down head 8 is used.
The vertical tube 25 fitted to the upper end of the stem is vertically suspended from the center of the back surface of the top wall 26, the hanging wall 27 is vertically suspended from the peripheral portion of the top wall 26, and the base end is opened at the upper portion of the vertical tube 25. The nozzle 28 is configured to protrude so as to be able to be ejected forward, and a screw thread provided on the inner surface of the hanging wall 27 is screwed to the outer surface of the screw cylinder 18 to thereby form a nozzle.
The movable ejection part B in the pressed state can be locked to the fixed suction part A.

In the illustrated example, a downward step 23 is formed at a predetermined position on the vertical cylinder 25 of the push-down head 8 to form the closing member C.
The upper surface of the base cylinder portion 22 is configured to be able to be pushed down, and an upward step portion 24 is formed at a predetermined position below the outer surface of the stem 7 so that the lower surface of the base cylinder portion 22 of the closing member C can be pushed up.

Then, from the most elevated state of the movable ejection part B,
When the movable jetting portion B is pushed down and screwed and locked to the fixed suction portion A, the downward stepped portion 23 pushes down the upper surface of the base tube portion 22 so that the annular closing portion 21 is opened as shown in FIG. Only push down to the position to close. When the screw is released from the above state and the movable ejection portion B is raised, the upward step portion 24 pushes up the lower surface of the base cylinder portion 22 and the upwardly directed step portion 24 shown in FIG.
As shown in the figure, the upper portion is pushed up until the upper surface of the annular closing portion 21 is brought into contact with and locked to the lower surface of the seal cylinder 17. 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.

Also, when the movable ejection portion B moves up and down during the ejection of the liquid, the liquid can be properly ejected by the stroke of the movable ejection portion B such that the downward stepped portion 23 does not come into contact with the base cylinder portion 22. Make up.

Hereinafter, other portions of the present embodiment will be described. A suction valve 29 is provided in the lower portion of the cylinder 5, and a pipe 30 having an upper end fitted below the suction valve 29 is hung down to a lower end portion of the container. The suction valve 29 has a fixing ring that supports the valve plate via a rod-shaped elastic plate, is fitted and fixed to the lower end of the cylinder, and a flange is formed inward from each of a pair of left and right support plates rising from both sides of the upper surface of the fixing ring. A protruding valve member is provided between the flanges and connects the outer periphery of a cylindrical portion rising in the lower portion of the cylinder. A lower surface of a coil spring, which will be described later, is brought into contact with the upper surface of each of the flanges.

The mounting cylinder 4 has a mounting flange projecting inward from the upper end thereof, and the flange is rotatably fitted on the upper surface of the flange 9 of the cylinder.
The screw cap 18 of the ring cap 10 prevents the cap from coming off, and is provided rotatably with respect to the cylinder.

The stem 7 is a conduit 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 spring 31 at the lower end. The upper end is always urged upward with the intermediary of the ring cap 10 so that the upper end thereof can be moved upward and downward above the ring cap 10. A discharge valve 32 is provided above the inside.

An example of how to use 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 21 of the closing member C closes only the outside air introduction hole a. When using the coil spring 31, the press-down head 8 is rotated to remove the screw connection.
Is raised by the upward biasing force of At this time, the lower surface of the closing member C abuts on the upward step portion 24 of the movable ejection portion and is pushed up, so that the outside air introduction hole a and one end opening of the ventilation passage b are formed through the annular gap d of the annular closing portion 21. The inside of the container and the outside communicate with each other. Next, the movable jetting part B is moved up and down several times to perform an initial operation, and the liquid in the container body is introduced into the cylinder to prepare the cylinder. At this time, the closing member C is stopped at the uppermost position pushed up. Next, when the press-down head is pressed down, the pressurized liquid in the cylinder opens the discharge valve 32 and the stem 7
Through the nozzle 28. Next, when the head is released from the pressure, the movable jetting portion B rises by the action of the coil spring 31, and the pressure in the cylinder is reduced to a negative pressure. The outside air is introduced into the negative pressure container.

When the push-down head 8 is screwed and locked again, the upper surface of the closing member C is pushed down by the downward step portion 23 of the head, and only the original outside air introduction hole a is closed.

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

[0028]

As described above, the trigger type liquid ejection pump according to the present invention has the above-described structure, and particularly, has an outside air introduction hole a communicating with the container inside the upper portion of the cylinder, and the outside air introduction hole a above the introduction hole. The other end of the ventilation passage b having one end opened on the inner surface of the cylinder 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 of the outer peripheral surface. Is slidably fitted to the upper portion of the inner surface of the cylinder, and the upper end of the base tube portion 22 having the annular closing portion 21 integrally protruded from the lower portion of the outer surface is raised and lowered above a gap between the stem and the upper opening edge of the fixed suction portion. A closing member C movably protruding is provided, 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 23 provided above the movable ejection portion to introduce the outside air. Hole a only When the movable jetting part shifts to the highest state when the movable jetting part shifts to the closed state, the closing member is pushed up by the upward step portion 24 provided below the movable jetting part, and the outside air introduction hole a and the air passage through the annular gap d are provided. Since the communication state is shifted to the communication state b, and the above-mentioned communication state is maintained when the movable ejection part moves up and down for ejecting liquid, the movable ejection part is compactly locked in a state where the movable ejection part is pushed down when not in use. In this case, even if the container is accidentally dropped, the liquid does not leak from the container body into the cylinder. As a result, there is no possibility that the liquid leaks from the upper end opening of the fixed suction part during use.

Further, since the outside air is introduced into the negatively pressurized container through a ventilation path of another route, an annular space, and an outside air introduction hole, the gap between the stem and the peripheral edge of the upper end opening of the fixed suction portion is closed. It can be closed relatively liquid-tight than the base cylinder part of the member,
Intrusion of liquid from this gap can be prevented as much as possible.

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, which is compared with a structure in which a valve plate that closes one end opening is opened and communicated by air pressure. The outside air can be more reliably introduced.

Further, when the movable ejection portion is pushed down and locked or when the movable ejection portion is raised 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 into a non-communication state. Because it can be done, handling is extremely convenient.

[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.

FIG. 3 is an enlarged sectional view of a main part of an upper portion of a cylinder of the embodiment.

FIG. 4 is an enlarged sectional view of a main part of a cylinder upper portion showing another embodiment of the present invention.

[Explanation of symbols]

2 ... container body, 3 ... mouth and neck, 4 ... mounting cylinder, 5 ... cylinder,
6 ... Annular piston, 7 ... Stem, 8 ... Press down head,
Reference numeral 21: annular closing portion, 22: base cylinder portion, 23: downward step portion, 24: upward step portion, A: fixed suction portion, B: movable ejection portion, C: closing member, a: outside air introduction hole, b: ventilation Road, d ... annular gap

Claims (1)

[Claims] 1. A fixed suction part 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 part 3 of a container body 2, and slidable on the inner surface of the cylinder. And a movable ejection portion B in which a downward press-down head 8 is fitted and fixed to the upper end of a stem 7 provided in an upwardly urged state so as to be movable upward and downward by linking an annular piston 6 fitted to the lower portion of the outer surface. A liquid ejecting pump configured to suck up the liquid in the container body by upward and downward movement and to eject the liquid from the ejection port of the head, and to be able to be locked to the fixed suction section while the movable ejection section is pressed down. An outside air introduction hole a for communicating with the container body is formed in the upper part of the cylinder, 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. Matching The annular closing portion 21 forming an annular gap d at the center in the vertical direction of the outer peripheral surface is slidably fitted to the upper portion of the inner surface of the cylinder and the annular closing portion 21 is formed.
A closing member C is provided in which the upper end of the base cylinder portion 22 integrally protruding from the lower portion of the outer surface is vertically movably protruded above the gap between the stem and the upper opening edge of the fixed suction portion.
When the state shifts to the lowermost locked state, the closing member C is pushed down by the downward step 23 provided above the movable ejection section to shift to a state where only the outside air introduction hole a is closed, and the movable ejection section is moved to the lowest position. When shifting to the ascending state, the closing member is pushed up by the upward step portion 24 provided at the lower portion of the movable ejection part, and the state shifts to the communication state of the outside air introduction hole a and the ventilation path b through the annular gap d, and the movable ejection is performed. A liquid ejection pump characterized in that the above-mentioned communication state is maintained during vertical movement for ejecting liquid from the section.