JPH10211948A - Liquid-ejecting pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a push-head type liquid-ejecting pump that is capable of preventing liquid from drying and hardening with out dripping of liquid and also easily and certainly assembled on occasion of mounting. SOLUTION: For the pump, a valve member C is composed of an annular base part 10 fitted to the lower end part at the inside of a cylinder, a plurality of elastic connecting pieces 11 provided at intervals along the circumferential direction at the inner face of the base part with each of one ends thereof connected to the inner face, a valve plate 13 for closing an inlet valve port 12 in a manner of moving vertically with each of other ends of the connecting pieces integrally connected thereto, and a plurality of elastic plates 14 provided in the circumferential direction at the periphery at the upper face of the valve plate 13 while being upright heading toward the upside, and a suction valve 5a is formed therewith. Then, the structure is so constructed that the upper end of each of the elastic plates 14 is press contacted and held to the lower part of a stem 8 constituting a movable ejection part with the movable ejection part B composed of a push-down head and the like put under the state of being pushed down and held.

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, a fixed suction unit in which a cylinder with a suction valve is fixed in a state where a lower end thereof is hung down in a container body by a mounting cap fitted to the outer periphery of the mouth and neck of the container body, and a cylinder inner periphery. The upper end of the stem, which is linked to the lower part of the outer periphery of the annular piston fitted vertically movably, projects upward and downward from the center opening of the upper end of the fixed suction part so that it can move up and down, and the lower head is fitted to the upper end of the stem. It is generally known to have a movable ejection section fixed, and to lift liquid in the container body by vertical movement of the movable ejection section and eject the liquid from the ejection port of the head. Also, the suction valve or discharge valve of this type of pump is
It generally comprises a valve seat and a ball-shaped valve element mounted on each valve seat. Further, in order to facilitate the handling during storage and transportation, the movable ejection section is generally configured to be able to be engaged with the fixed suction section while being pushed down. The above-described conventional pump may have a problem that the liquid remaining in the nozzle after the liquid is ejected drips from its tip or the liquid remaining at the tip of the nozzle is dried and solidified.

In order to solve such inconveniences, there has been proposed a suction valve in which a ball-shaped valve element is pressed against a valve seat by a coil-shaped auxiliary spring having relatively low elasticity. These are configured, for example, by pressing the lower end of an auxiliary spring, whose upper end is locked to a cylindrical member provided in the lower part inside the cylinder, into pressure contact with the upper surface of the ball-shaped valve body. The cylindrical member has a cylindrical shape with an opening at the lower end surface, and a flange protruding from the lower portion of the outer surface of the cylinder wall is mounted on a plurality of ribs protruding circumferentially at the lower end portion of the inner surface of the cylinder, and is movable on the upper surface of the flange. A lower end of another coil-shaped spring for biasing the ejection portion upward is fixedly supported by press-contacting a lower end of the coil spring, and a hole is provided in the cylindrical wall for flowing the liquid, and a top plate is provided. A bar-like projection for restricting the vertical movement of the ball-shaped valve element is provided vertically from the center of the lower surface. With the above configuration, when the movable ejection part after liquid ejection rises, the suction valve does not open due to the action of the auxiliary spring until the open discharge valve closes, and as a result, the liquid in the nozzle enters the cylinder. It can prevent liquid dripping by flowing backward.

[0004]

However, in the prior art, when assembling it, first, a ball valve body is placed, and then a coil spring and a tubular member are sequentially mounted.
Alternatively, a cylindrical member in which a coil spring is locked after mounting the ball-shaped valve body is mounted. Therefore, since each member must be mounted separately, the work becomes complicated, and
There is a possibility that the coil spring comes into contact with the lower surface of the ball-shaped valve body at a displaced position on the upper surface thereof, which may cause inconvenience, which may cause malfunction.

The present invention has been made in view of the above circumstances, and proposes a pump that does not drip, can prevent drying and solidification of a liquid, and can be easily and reliably assembled at the time of assembling. Further, despite the fact that the suction valve is formed of a synthetic resin member that does not use a conventional metal ball-shaped valve body, a good valve function can be maintained for a long period of time. An object of the present invention is to provide an excellent pump having an advantage that it can be manufactured at a low cost without a large structural change as compared with a seed pump.

[0006]

According to a first aspect of the present invention, there is provided a pump having a suction valve in which a lower end thereof is suspended in a container by a mounting cap fitted to an outer periphery of a neck portion of a container body. The upper end of a stem 8 in which a fixed suction portion A in which a cylinder 6 with a cylinder 5 is fixed and an annular piston 7 fitted to the inner periphery of the cylinder so as to be vertically movable is linked to the lower portion of the outer periphery. A movable ejecting portion B having a vertically upwardly projecting state in which the movable ejecting portion is fixedly attached to the upper end of the stem; Along with being configured to squirt from the spout of the head,
In the liquid ejection pump configured to be able to be locked to the fixed suction unit in a state where the movable ejection unit is pressed down, the suction valve 5 may include:
An annular base 10 fitted to the lower end of the cylinder, a plurality of elastic connecting pieces 11 each having one end connected to the inner surface of the base at a circumferential interval, and the other end of each connecting piece integrally connected to the outer peripheral surface. A valve member C comprising a valve plate 13 for closing the suction valve hole 12 so as to be able to move up and down, and a plurality of elastic plates 14 in the circumferential direction which are integrally erected above the peripheral edge of the upper surface of the valve plate 13. Wherein the upper end of each of the elastic plates 14 is pressed into engagement with the lower portion of the stem 8 when the movable ejection portion B is held down. It was configured as a pump.

In the pump according to the second aspect of the present invention, the cylinder 6 with the suction valve 5 is fixed in a state where the lower end is suspended in the container body by the mounting cap 4 fitted to the outer periphery of the container body neck and neck 3. A suction portion A and an upper end of a stem 8 in which an annular piston 7 fitted to the inner periphery of the cylinder so as to be vertically movable is linked to a lower portion of the outer periphery. Let it protrude,
A movable ejection portion B having a press-down head 9 fitted and fixed to the upper end of the stem, wherein the movable ejection portion is moved up and down to suck up the liquid in the container and eject the liquid from the ejection port of the head; In the liquid jet pump configured to be able to be locked to the fixed suction part in the depressed state, the suction valve 5 is provided with a circumferential space between the annular base 10 fitted to the lower end of the cylinder and the inner surface of the base. A valve member D comprising a plurality of elastic connecting pieces 11 each having one end connected thereto, and a valve plate 13 which integrally connects the other end of each elastic piece to the outer peripheral surface and vertically closes the suction valve hole 12. A suction valve 5b provided and provided, and a plurality of elastic plates 24 in the circumferential direction are integrally suspended below the lower surface of the stem, and the lower end of each elastic plate 24 in the state where the movable ejection portion B is pressed down and locked. Is pressed into contact with the periphery of the upper surface of the valve plate 13. The liquid ejection pump is characterized in that it is configured to stop.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in the drawing, the liquid jet pump 1 of the present invention is configured such that a cylinder 6 with a suction valve 5 is fixed in a state where the lower end thereof is hung down in a container body by a mounting cap 4 fitted to the outer periphery of the mouth and neck 3 of the container body 2. The upper end of a stem 8 having a fixed suction portion A and an annular piston 7 fitted to the inner periphery of the cylinder so as to be able to move up and down is linked to the lower portion of the outer periphery. A movable ejection portion B is provided, which protrudes as much as possible, and has a press-down head 9 fitted and fixed to the upper end of the stem. In addition, the structure is such that the liquid in the container body is sucked up by the vertical movement of the movable ejection part B and ejected from the ejection opening of the head, and the movable ejection part B can be locked to the fixed suction part with the movable ejection part pressed down.

According to the first aspect of the present invention, in this type of conventional pump, the suction valve 5 is provided with an annular base 10 fitted to the lower end portion of the cylinder 6 and a circumferential interval between the inner surface of the base portion. A plurality of elastic connecting pieces 11 each having one end connected thereto, a valve plate 13 which integrally connects the other end of each connecting piece to the outer peripheral surface and vertically closes the suction valve hole 12, and a peripheral edge of the upper surface of the valve plate 13; It is configured as a suction valve 5a provided with a valve member C comprising a plurality of elastic plates 14 in the circumferential direction which are integrally erected above the portion.

In the embodiment shown in FIGS. 1 and 2, the annular base 10 has a ring shape, and the outer surface is fitted to the inner surface of each of a plurality of locking ribs 15 protruding circumferentially at the lower end of the inner surface of the cylinder 6. The bottom surface is abutted and fixed on the cylinder bottom wall. The elastic connecting piece 11 has one end connected to the inner surface of the annular base 10, extends in an arc shape along the annular base 10 after going to the center, and has a deformed rod shape extending toward the center again, and is formed at regular intervals in the circumferential direction. The other end is integrally connected to the outer surface of the circular valve plate 13 to support the valve plate 13 so as to close the valve hole 12. Each of the elastic plates 14 is a vertically long plate having an arc-shaped cross section, which stands up at equal intervals in the circumferential direction from the peripheral edge of the upper surface of the valve plate 13, and as shown in FIG.
When pressed down, the upper ends thereof are pressed into engagement with the tapered portions 16 formed at the lower end of the inner surface of the stem, respectively, and are configured to have a length such that they are slightly curved. Then, in this state, the valve plate 13 is pressed against the cylinder bottom wall.

Hereinafter, other portions of the present embodiment will be described. An auxiliary cap 17 is fitted and fixed to the upper end of the cylinder. The auxiliary cap 17 has a flange-like top plate extending inward from the upper end edge of the fitting cylinder fitted to the upper end of the outer surface of the cylinder. A guide cylinder extends vertically from the inner peripheral edge, and a seal cylinder that fits into the upper end of the inner surface of the cylinder extends vertically from the lower surface of the top plate outside the guide cylinder. The mounting cap 4 has a flange-shaped top wall extending inward from the upper end edge of the peripheral wall fitted to the outer periphery of the container body neck portion 3 by means such as screwing, and the top wall is formed on a flange protruding above the outer surface of the cylinder. And the fitting tube of the auxiliary cap is positioned above the inner peripheral edge thereof to prevent slipping out.

A pipe 18 is mounted by fitting the upper end into a fitting cylinder vertically provided on the lower surface of the cylinder 6, and the lower end thereof is hung below the inside of the container. A movable spring B is constantly urged upward with a coil spring 19 interposed between the upper surface of the annular base 10 and the lower surface of the stem 8 in the cylinder.

The push-down head 9 has a vertical cylinder 20 having a lower part fitted to the upper end of the outer periphery of the stem 8 and a nozzle 21 having a base end opened at the upper front surface of the vertical cylinder and projected forward. A flow path is formed from the inside of the stem to the jet port at the tip of the nozzle via the vertical cylinder, and a double cylinder is vertically suspended around the vertical cylinder,
The inner surface of the screw cylinder is configured to be screwable with a thread provided on the outer surface of the upper part of the guide cylinder of the auxiliary cap 17, and is configured to be able to be locked to the fixed suction part A while the movable ejection part B is pressed down. .

A discharge valve 22 is provided at the upper end of the stem 8. The discharge valve 22 is configured by providing a valve body 23 having a rod-shaped portion suspended from the center of the lower surface of the conical portion which closes by contacting the upper portion of the outer periphery with the upper surface of the tapered valve seat formed on the upper surface of the stem. . The case where the pump constructed as described above is used will be described. As shown in FIG. 2, during transportation and storage, the movable suction part B is pushed down and the fixed suction part A is pressed down.
At this time, the valve plate 13 of the valve member C is pressed against the upper surface of the cylinder bottom wall via each elastic plate 14 as described above.

In use, the movable ejection portion B is unscrewed and raised by the action of the coil spring 19. Next, the liquid in the container is introduced into the cylinder by performing an initial operation of moving the movable ejection portion B up and down several times, and the head 9 is moved from that state.
When the movable jetting part B is depressed by pressing down, the inside of the cylinder is pressurized, and the pressurized liquid opens the discharge valve 22 and the nozzle of the head 9
Spouts from 21 tip spout. Next, when the pressing of the head 9 is released, the movable ejection portion B is raised by the action of the coil spring, and the pressure in the cylinder 6 is reduced to negative pressure. At this time, the discharge valve 22 is open at the beginning of the negative pressure, and the suction valve 5a
Does not open due to the support force of each elastic connecting piece 11, and as a result, the residual liquid in the nozzle 21 flows backward. When the discharge valve 22 is closed, the suction valve 5a opens against the urging force of each elastic connecting piece 11, and the liquid in the container body 2 is introduced into the cylinder 6 via the pipe.

FIGS. 3 and 4 show a pump according to a second embodiment of the present invention. In the pump according to the second embodiment of the present invention, the suction valve 5 has an annular base 10 fitted to the lower end of the cylinder and an inner surface of the base. A suction valve comprising a valve member D comprising a valve plate 13 for integrally connecting the other end of an elastic connecting piece 11 having one end connected at an interval in the circumferential direction to an outer peripheral surface to close a suction valve hole 12. 5b, a plurality of elastic plates 24 in the circumferential direction are integrally provided vertically below the lower surface of the stem 8. Then, in the state where the movable ejection portion B is pressed down and locked,
The lower end of each elastic plate 24 is configured to be pressed and locked to the peripheral edge of the upper surface of the valve plate 13.

In this embodiment, the valve member D has the same configuration as the embodiment of FIG. 1 except that the elastic plates 14 of the valve member C are removed. A plurality of the elastic plates 24 are provided vertically below the lower surface of the stem 8 at equal intervals in the circumferential direction, and have a vertically long plate shape with a circular cross section. Also,
A screw is formed around the outer surface of the fitting cylinder of the auxiliary cap so that the screw can be screwed with a screw formed below the inner surface of the lower wall of the push-down head 9, so that the movable ejection portion B in the push-down state can be lowered.
Can be locked to the fixed suction unit. The other configuration is substantially the same as the embodiment of FIGS. 1 and 2, and the description is omitted. In each of the above embodiments, each member can be formed of a synthetic resin, and if necessary, an elastomer, a metal, or the like can be used in combination.

[0018]

As described above, the pump of the present invention has the above-described structure, and in particular, has an annular base 10 fitted to the lower end of the cylinder and one end each having a circumferential interval on the inner surface of the base. A plurality of elastic connecting pieces 11 connected to each other, a valve plate 13 that integrally connects the other end of each connecting piece to the outer peripheral surface and closes the suction valve hole 12 so as to be able to move up and down, and from a peripheral edge of the upper surface of the valve plate 13. A suction valve 5a provided with a valve member C comprising a plurality of elastic plates 14 extending in the circumferential direction integrally provided upward, and in a state where the movable ejection portion B is pressed down and locked, the upper end of each of the elastic plates 14 Or a plurality of elastic bases each having one end connected to the inner surface of the base at an interval in the circumferential direction. The connection piece 11 and the other end of each elastic piece are integrally connected to the outer peripheral surface to raise the suction valve hole 12. A suction valve 5b provided with a valve member D comprising a valve plate 13 which is closed so as to be able to move downward; a plurality of elastic plates 24 in the circumferential direction are vertically provided below the lower surface of the stem; Since the lower end of each elastic plate 24 is pressed and locked to the peripheral edge of the upper surface of the valve plate 13 in the state where the portion B is pressed down and locked, inconveniences such as liquid dripping can be prevented as much as possible in the conventional manner. At the time of attachment, assembly can be performed easily and reliably.

Further, since the suction valve is constructed without using a conventional metallic ball-shaped valve element, there is no need to separate the portion, and the movable ejection portion is not required during storage and transportation. If pressed down, the valve plate 13
Even if the container on which the pump is mounted is placed in a side-down state by being pressed against the upper surface of the cylinder bottom wall by 4 and 24, there is no inconvenience such that the elastic connecting piece 11 remains extended by the hydraulic pressure. An unnecessary load is prevented from being applied to the connecting piece as much as possible, and a good valve function can be maintained for a long period of time despite the use of a synthetic resin valve member. Also, compared to this type of conventional pump, only the structure of a part of the suction valve part or part of the stem needs to be changed, and there is no significant structural change. ing.

[Brief description of the drawings]

FIG. 1 is a partially cut-away half sectional view showing an embodiment of the pump according to the first aspect of the present invention.

FIG. 2 is a partially cutaway half cross-sectional view showing a state in which a movable ejection part is pushed down and locked in the embodiment.

FIG. 3 is a partially cutaway half sectional view showing an embodiment of the pump according to the second aspect of the present invention.

FIG. 4 is a partially cutaway half cross-sectional view showing a state in which the movable ejection part is pushed down and locked in the embodiment.

[Explanation of symbols]

2 ... container body, 3 ... pump, 4 ... mounting cap, 5, 5a,
5b: suction valve, 6: cylinder, 7: annular piston, 8
... Stem, 9 ... Depressing head, 10 ... Circular base, 11 ... Elastic connecting piece, 12 ... Suction valve hole, 13 ... Valve plate, 14,24 ... Elastic plate, A ... Fixed suction part, B ... Movable ejection part, C , D ... Valve member

Claims (2)

[Claims] 1. A fixed suction part A in which a cylinder 6 with a suction valve 5 is fixed in a state where a lower end thereof is hung down in a container body by a mounting cap 4 fitted to an outer periphery of the neck part 3 of the container body.
The upper end of a stem 8 having an annular piston 7 fitted to the inner periphery of the cylinder so as to be vertically movable is linked to the lower part of the outer periphery. And a movable ejection portion B having a press-down head 9 fitted and fixed to the upper end of the stem. The movable ejection portion is moved up and down to suck up the liquid in the container and eject the liquid from the ejection port of the head. In the liquid ejection pump configured to be able to be locked to the fixed suction part in a state where the part is pushed down, the suction valve 5 is provided with an annular base 10 fitted to the lower end of the cylinder and a circumferential interval between the inner surface of the base and the base. A plurality of elastic connecting pieces 11 each having one end connected thereto, and a suction valve hole 12 having the other end of each connecting piece integrally connected to the outer peripheral surface.
A suction valve 5a which is provided with a valve member C comprising a valve plate 13 for vertically closing the valve plate 13 and a plurality of elastic plates 14 in the circumferential direction which are integrally erected above the peripheral edge of the upper surface of the valve plate 13. A liquid ejection pump characterized in that the upper end of each of the elastic plates 14 is pressed and engaged with the lower portion of the stem 8 when the movable ejection portion B is pressed down and locked. 2. A fixed suction section A in which a cylinder 6 with a suction valve 5 is fixed in a state where a lower end thereof is suspended in a container body by a mounting cap 4 fitted on the outer periphery of the container body neck portion 3.
The upper end of a stem 8 having an annular piston 7 fitted to the inner periphery of the cylinder so as to be vertically movable is linked to the lower part of the outer periphery. And a movable ejection portion B having a press-down head 9 fitted and fixed to the upper end of the stem. The movable ejection portion is moved up and down to suck up the liquid in the container and eject the liquid from the ejection port of the head. In the liquid ejection pump configured to be able to be locked to the fixed suction part in a state where the part is pushed down, the suction valve 5 is provided with an annular base 10 fitted to the lower end of the cylinder and a circumferential interval between the inner surface of the base and the base. A plurality of elastic connecting pieces 11 each having one end connected thereto, and a suction valve hole 12 having the other end of each elastic piece integrally connected to the outer peripheral surface.
Is a suction valve 5b provided with a valve member D comprising a valve plate 13 that closes up and down movably, and a plurality of circumferential elastic plates 24 are vertically provided below the lower surface of the stem, and the movable valve is movable. A liquid ejection pump characterized in that the lower end of each elastic plate 24 is pressed against and engaged with the peripheral edge of the upper surface of the valve plate 13 when the ejection portion B is held down.