JP2564040Y2 - Liquid injection device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid ejecting apparatus for manually discharging a stored liquid under pressure.

[0002]

2. Description of the Related Art A large number of liquid ejecting apparatuses of this kind have been proposed and are well known. JP-A-2-81653 is one of them. As can be seen from this publication, the liquid ejecting apparatus has a pump-type injector main body attached to the mouth of the container. That is, a press-down head with a nozzle pipe is fixedly connected to the upper end of a stem rising upward and outward from a vertical cylinder installed in the mouth of the container body, and the press-down head is pressed down against a return spring. The liquid in the cylinder is pressurized by the cylindrical piston at the lower end of the stem, and the pressurized liquid is discharged from the nozzle tube to the outside by opening the discharge valve in the upper part of the stem by itself.

[0003] When the liquid injection is completed, the movable parts of the cylindrical piston, the stem and the push-down head are returned upward by a return spring, and the pressure inside the cylinder is reduced by this return. The suction valve is opened and liquid is sucked from the container into the cylinder to prepare for the next injection.

[0004]

Although the above-described liquid ejecting apparatus is a standard product, it is a high-grade liquid ejecting apparatus which sufficiently pursues a function and a long life, and is therefore complicatedly constituted by a large number of parts. That is, the pump part of the injector body is a cylinder,
It consists of five parts: a cylindrical piston, a stem, a return spring, and an adjusting rod.

[0005] By the way, this kind of product may be stored in a cosmetic solution or the like and distributed to a store as a free sample.
In the case of such a sample, the amount of the injection liquid may be small, and the injector itself does not need to be a high-grade product.

An object of the present invention is to provide a liquid ejecting apparatus having a simple structure with a small number of parts and a low cost structure suitable for a sample.

[0007]

A liquid ejecting apparatus according to the present invention is screwed into a container 1 and a mouth and neck 7 of the container 1.
The top plate 8 has a screw cap 2 having a large opening at the center and having an inward flange shape, and a mounting peripheral wall fitted and fixed by forming a ventilation gap 9 between the outer surface of the screw cap 2 and the outer surface. 10 and an inward flange 11, a small-diameter communication cylinder 13 is hung down on the shaft core of the mouth and neck portion 7 via an upstanding peripheral wall 12 that is raised from the inner peripheral edge of the inward flange 11, and the communication cylinder 13 A suction pipe 14 hanging down in the container body 1 is connected and connected, and a supporting peripheral wall 15 is erected from an outer peripheral edge of the inward flange 11, and a nozzle pipe 16 is laterally outwardly provided from a lower portion of one side of the supporting peripheral wall 15. The communication tube 13 is supported by a protruding head member 3 and a spring arm 18 extending inward in a spiral shape from several places in the circumferential direction of the upper inner surface of a mounting tube 17 externally fitted and fixed to the upstanding peripheral wall 12.
An elastic suction valve 19 for closing the upper end opening is provided, and reaches the inner surface of the upper part of the supporting peripheral wall 15 outside from the upper peripheral edge of the mounting cylinder 17, and the donut-shaped space between the upper part and the upper part is closed to close the nozzle tube 16. A valve member 4 having a skirt-shaped elastic discharge valve 20 surrounding the valve member, and an elastic dome 5 for forming a pressurized chamber 21 which is fixedly supported by the supporting peripheral wall 15 at a lower peripheral wall and covers the valve member 4 above.
And a communication cylinder 13 having a cylindrical shape of a lower vault and the mouth and neck 7
And a resilient intake valve 6 disposed in a donut-shaped intake passage therebetween.

[0008]

In the above, when ejecting the liquid, the top of the elastic dome 5 is pushed and deformed to compress the pressurizing chamber 21 to pressurize the liquid inside. Then, as shown in FIG.
Is pressed inward to open the valve, and is ejected from the nozzle tube 16 to the outside.

When the pushing of the elastic dome 5 is stopped at the end of the liquid injection, since the discharge valve 20 has already returned and closed at this time, the elastic dome 5 returns to its original shape due to elasticity, and the pressurizing chamber is pressed.
As a result, the suction valve 19 floats upward against the spring arm 18 and opens as shown in FIG. 2B, so that the liquid in the container 1 passes through the suction pipe 14 and enters the pressure chamber 21. Can be sucked up. The suction attempts to create a negative pressure in the container body 1, but the negative pressure causes the intake valve 6 to open, and the outside air is sucked into the container body 1 through the intake gap 9 to reduce the negative pressure. Prevention and a standby state for the next liquid injection.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
In the liquid ejecting apparatus according to the present invention, the suction valve 19 and the discharge valve 20 are formed by one valve member 4, and the pump unit is formed as a single elastic dome 5. In addition, screw cap 2, head member 3, elastic intake valve 6
It is characterized by being formed with decimal parts. The container body 1 may have an arbitrary shape as appropriate. Here, as shown in FIG. 3, the container body 1 has a rectangular parallelepiped shape that is easily curved in a U-shape when viewed from the top, and a screw is provided on the outer surface of the mouth and neck 7. It forms a mountain.

The screw cap 2 has a large opening at the center of the top plate 8 to form an inward flange, and the lower edge of the inner peripheral edge of the opening of the top plate 8 is cut off to form an empty space on the outer surface of the mouth and neck 7. It is screwed on. An engaging ridge 22 protrudes from the lower outer surface of the mounting peripheral wall of the screw cap 2, and the engaging ridge 22 is notched vertically in some places in the circumferential direction so as to be able to ventilate up and down.

The head member 3 has a mounting peripheral wall 10 having dimensions slightly larger than the screw cap 2 and an inward flange 11, and engages with the engaging ridges 23 on the inner surface at the lower part of the peripheral wall 10. By mounting the inward flange 11 on the top plate 8 via a hanging piece hanging down in a circumferential direction on the lower surface thereof,
A ventilation gap 9 is formed between the screw cap 2 and the outer surface, and the screw cap 2 is fitted and fixed.

The head member 3 is further provided with an inward flange.
An upright peripheral wall 12 is raised from the inner peripheral edge of the peripheral wall 12, and a small-diameter communication tube 13 is vertically provided from the upper end of the peripheral wall 12 via an inward flange at the shaft core of the mouth-neck portion 7. A suction pipe 14 hanging downward in the container body 1 is connected and connected, and a double inner and outer peripheral wall 15 is erected from the outer peripheral edge of the inward flange 11. Nozzle tube towards
16 project through.

The valve member 4 is made of rubber or a soft synthetic resin.
A disc that is held by three spring arms 18 extending inward from three equally spaced locations on the upper inner periphery and closed at the upper end opening of the communication cylinder 13 by ring-shaped feet 24 on the lower peripheral edge. A resilient suction valve 19 is provided, and a donut-shaped space between the mounting cylinder 17 and the upper peripheral surface of the inner peripheral wall of the supporting peripheral wall 15 is pressed from the upper peripheral edge of the mounting cylinder 17 to seal the donut-shaped space between the peripheral wall and the nozzle. A skirt-shaped elastic discharge valve 20 for closing the pipe 16 is provided around the periphery, and the two valves 19 and 20 are formed as one piece.

The elastic dome 5 is also made of rubber or soft synthetic resin. The lower peripheral wall is sandwiched between the inner and outer double peripheral walls of the supporting peripheral wall 15, and the outer peripheral wall branched from the lower peripheral wall is formed on the outer periphery of the supporting peripheral wall 15. A pressure chamber 21 is formed so as to be engaged with and fixed to the outer surface of the peripheral wall so as to cover the upper part of the valve member 4.

The intake valve 6 is a lower-bore cylindrical member made of rubber or a soft synthetic resin.
13 is arranged in a donut-shaped space, and the upper thick portion is cut into a ring 25 fixed between the top surface of the mouth and neck 7 and the top plate 8 of the screw cap 2. The upper part is sandwiched and fixed between the inner peripheral parts of the top plate 8, and the lower elastically deforming part is pressed against the outer surface of the communication cylinder 13 to constantly cut off the ventilation gap 9.

Reference numeral 26 denotes a cap-like pressing head.
As shown in FIGS. 1 and 3a, a band-like groove 27 is formed in the lower inner periphery of the peripheral wall, and a notch groove 28 is provided on one side, and the nozzle tube 16 is passed through the notch groove 28 so that the outer surface of the elastic dome 5 can be formed. The engagement ridge 29 on the lower edge of the band-like groove 27 is engaged with the engagement ridge 30 on the outer surface of the upper part of the head member 3 so as to be pushed down by the width of the band-like groove 27. However, the pressing head 26 need not always be provided. FIG. 2B is a view in which the pressing head 26 is omitted.

The above-mentioned parts forming the main body of the injector excluding the container 1 are preliminarily integrated integrally. The main body is filled with the liquid in the container 1 and then connected to the container 1 via the screw cap 2. Assembled.

In this embodiment, if the top of the elastic dome 5 is pushed and deformed to compress the pressurizing chamber 21, the internal liquid can be pressurized. The pressurized liquid pushes the discharge valve 20 open and out of the nozzle pipe 16 to the outside. Can be injected.

When the compression of the elastic dome 5 is stopped, the dome 5 returns to its original shape, and the discharge valve 20 returns to the closed state. At this time, the pressure in the pressurizing chamber 21 is reduced to a negative pressure. Float upward and open the valve.
The inner liquid is sucked into the pressurizing chamber 21 and the container 1
However, the outside air is sucked into the container body 1 by opening the intake valve 6.

[0021]

As described above, in the liquid ejecting apparatus according to the present invention, the pump portion, which required five parts of the cylinder, the cylindrical piston, the stem, the return spring, and the adjusting rod, is formed by a single elastic dome. Since the suction valve 19 and the discharge valve 20 are formed as one part of the valve member 4 and have a simple configuration in which the number of parts of the injector body is greatly reduced, it can be provided at low cost and is suitable for a sample. .

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of one embodiment in a longitudinal section.

FIG. 2 is a partial longitudinal sectional view showing the operation of the embodiment, wherein a is an injection state and b is a suction state.

FIG. 3A is an external perspective view of the embodiment, and FIG. 3B is an external perspective view of another embodiment without using a pressing head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container body 2 Screw cap 3 Head member 4 Valve member 5 Elastic dome 6 Intake valve

Claims (1)

(57) [Scope of request for utility model registration] 1. A container body 1, a screw cap 2 screwed to a mouth and neck portion 7 of the container body 1, and a top plate 8 having a large opening at the center and having an inward flange shape. The outer peripheral portion has a mounting peripheral wall 10 which is fitted and fixed with a ventilation gap 9 formed between the outer peripheral surface and the outer peripheral surface, and an inward flange 11, and an upright peripheral wall 12 rising from the inner peripheral edge of the inward flange 11. A small-diameter communication tube 13 is hung down on the shaft core of the mouth-neck portion 7, a suction pipe 14 hung down in the container body 1 is connected to the communication tube 13, and a support tube is provided from the outer peripheral edge of the inward flange 11. A head member 3 having a peripheral wall 15 erected and a nozzle tube 16 protruding outwardly from a lower portion of one side of the supporting peripheral wall 15, and a circumferential direction of an upper inner surface of a mounting cylinder 17 which is externally fixed to the standing peripheral wall 12. Closed at the upper end opening of the communication cylinder 13 is supported by a spring arm 18 extending inward in a spiral shape from several places. Elastic suction valve 19 is provided,
The skirt-shaped elastic discharge valve 20 which reaches the inner surface of the upper part of the supporting peripheral wall 15 outside from the upper peripheral edge of the mounting cylinder 17 and seals the donut-shaped space between the upper part and the nozzle pipe 16 is closed. A valve member 4 provided, an elastic dome 5 for forming a pressurized chamber 21 having a lower peripheral wall supported and fixed to the supporting peripheral wall 15 and covering the upper side of the valve member 4; A liquid injection device comprising an elastic intake valve 6 disposed in a donut-shaped intake passage between the section 7 and the communication cylinder 13;