JPH0575187U - Liquid injection device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The injector body shall have a simple structure with a small number of parts and shall be of low cost suitable for use as a sample. [Structure] A screw cap 2 is screwed into a mouth / neck portion 7 of a container body 1, an air gap 9 is formed on an outer surface of the cap 2, and a fitting peripheral wall 10 and an inward flange 11 are fitted and fixed.
The suction pipe 14 is connected to the communication cylinder 13 that hangs via 12,
Flange 11 Peripheral Wall 15 Standing from Outer Perimeter 15 Head Member 3 with Nozzle Tube 16 Projected Outward from One Side Lower Part and Peripheral Wall 12
A spiral arm of a mounting cylinder 17 externally fitted and fixed to the
An elastic suction valve 19 that is supported by 18 and closes the upper end opening of the cylinder 13 is provided, and the donut-shaped space between the upper end peripheral edge of the cylinder 17 and the outer peripheral wall 15 that reaches the inner surface of this upper part is closed to close the pipe 16 A valve member 4 having an elastic discharge valve 20 surrounding the valve member 4 and a pressurizing chamber 21 having a lower peripheral wall supported and fixed to a peripheral wall 15 to cover the valve member 4 from above.
The elastic dome 5 for forming and the elastic intake valve 6 disposed in the donut-shaped intake passage between the mouth / neck portion 7 and the cylinder 13 are formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid ejection device for manually pouring a stored liquid under pressure.

[0002]

[Prior Art]

 Many liquid ejecting apparatuses of this kind have been proposed in the past and are very well known. Japanese Utility Model Laid-Open No. 2-81653 is one of them. As can be seen from this publication, the liquid ejecting apparatus has a pump-type ejector main body attached to the container mouth. In other words, a push-down head with a nozzle tube is connected and fixed to the upper end of the stem that is erected upward from the vertical cylinder installed inside the mouth of the container body, and this push-down head is pushed down against the return spring. The cylindrical piston at the lower end of the stem pressurizes the liquid in the cylinder, and the liquid under pressure is discharged from the nozzle pipe by opening the discharge valve at the upper part of the stem.

When the liquid injection is completed, the movable parts of the cylindrical piston, the stem, and the pressing head are returned upward by the return spring, and this return causes the inside of the cylinder to have a negative pressure. The suction valve is opened to suck the liquid into the cylinder from the container body and prepare for the next injection.

[0004]

[Problems to be solved by the device]

 Although the above-mentioned liquid ejecting apparatus is a standard product, it is a high-class one in which the function and the life are sufficiently pursued, and therefore, the liquid ejecting apparatus is complicatedly composed of many parts. That is, the pump part of the injector body is composed of five parts: a cylinder, a cylindrical piston, a stem, a return spring, and an adjusting rod.

By the way, this kind of product may be stored as a free sample in a store and distributed to a store as a free sample. In the case of such a free sample, a small amount of injection liquid may be used. The body itself need not be a luxury item.

The present invention aims at obtaining a liquid injection device having a low-cost structure suitable for a sample, in which the structure of the injector main body is simplified by a small number of parts.

[0007]

[Means for Solving the Problems]

 The liquid ejecting apparatus of the present invention includes a container body 1, a mouth neck portion 7 of the container body 1 which is screwed, a top plate 8 having a large central opening, and a screw cap 2 having an inward flange shape. The screw cap 2 has a mounting peripheral wall 10 and an inward flange 11 that are fitted and fixed to the outer surface of the screw cap 2 by forming a ventilation gap 9 between the outer surface and the inward flange 11. A small-diameter communication tube 13 is hung from the axial core of the mouth / neck portion 7 through a peripheral wall 12, and a suction pipe 14 that hangs in the container body 1 is connected to the communication tube 13 and is connected to an inward flange. 11 A supporting peripheral wall 15 is erected from the outer peripheral edge, and a head member 3 protruding laterally outward from a lower portion of one side of the supporting peripheral wall 15 and a mounting cylinder 17 externally fitted and fixed to the standing peripheral wall 12. The communication tube 13 is supported by spring arms 18 that extend inward in a spiral shape from several points on the inner surface of the upper part of the communication tube 13 in the circumferential direction. An elastic suction valve 19 for closing the end opening is provided, and a nozzle tube is provided by closing the donut-shaped space between the upper end peripheral edge of the mounting cylinder 17 and the upper peripheral wall 15 of the support, and closing the upper end. A valve member 4 surrounding a skirt-shaped elastic discharge valve 20 for closing 16 and an elastic dome 5 for forming a pressurizing chamber 21 whose lower peripheral wall is supported and fixed to the supporting peripheral wall 15 to cover the valve member 4 above. And an elastic intake valve 6 which is in the shape of a lower tub and which is arranged in a donut-shaped intake passage between the mouth / neck portion 7 and the communication cylinder 13.

[0008]

[Action]

 In the above, when the liquid is ejected, 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. 2A, this pressurized liquid is opened by closing the discharge valve 20 inward and opening the valve, and is ejected from the nozzle pipe 16 to the outside.

When the pushing of the elastic dome 5 is stopped at the end of the liquid injection, the discharge valve 20 has already returned and closed at this time, so the elastic dome 5 returns to its original shape by elasticity, and the pressurizing chamber 21 becomes negative pressure. As a result, the suction valve 19 floats upward and opens against the spring arm 18 as shown in FIG. 2b, so that the liquid in the container body 1 is sucked into the pressurizing chamber 21 through the suction pipe 14. This suction raises the negative pressure in the container body 1, but this 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 and becomes negative pressure. To prevent the next liquid injection.

[0010]

【Example】

 An embodiment will be described below with reference to the drawings. In the liquid injection device of the present invention, a suction valve 19 and a discharge valve 20 are formed by one valve member 4, and the pump portion is made of a single elastic dome 5. As a result, the injector main body is formed of a small number of parts including the screw cap 2, the head member 3, and the elastic intake valve 6 in addition to the valve member 4 and the elastic dome 5. The container body 1 may have any suitable shape, but here, as shown in FIG. 3, the container body 1 has a rectangular parallelepiped shape that is slightly curved when viewed from above, and the outer surface of the mouth / neck portion 7 has It forms a mountain.

The screw cap 2 has a large hole at the center of the top plate 8 to form an inward flange shape, and the lower edge of the inner peripheral edge of the hole of the top plate 8 is cut off to form a space to form an outer surface of the mouth / neck portion 7. It is screwed on. An engaging ridge 22 projects from the lower outer surface of the mounting peripheral wall of the screw cap 2, and the engaging ridge 22 is vertically notched in a circumferential groove to allow ventilation in the vertical direction.

The head member 3 has a mounting peripheral wall 10 and an inward flange 11 which are slightly larger than the screw cap 2, and the engaging projections 23 on the lower inner surface of the peripheral wall 10 are engaged with the engaging projections 22. By mounting the mating and inward flanges 11 on the top plate 8 via the hanging pieces that hang down on the lower surface in the circumferential direction, a ventilation gap 9 is formed between the outer surface of the screw cap 2 and the fitting fixing. There is.

The head member 3 further raises a standing peripheral wall 12 from the inner peripheral edge of the inward flange 11, and is positioned at the axial core portion of the mouth / neck portion 7 via the inward flange from the upper end of the peripheral wall 12 to have a small diameter. A communication tube 13 is hung vertically, and a suction tube 14 that hangs downward in the container body 1 is communicatively coupled to the small-diameter communication tube 13 and an inner / outer double supporting peripheral wall 15 is erected from the outer peripheral edge of the inward flange 11. However, the nozzle pipe 16 is projected outward from the lower side of one side of the peripheral wall 15 for support.

The valve member 4 is made of rubber or soft synthetic resin, and is a three-body structure that extends inward in a spiral shape from three equidistant locations on the inner circumference of the upper part of the mounting cylinder 17 that is externally fitted and fixed to the upright peripheral wall 12. A disk-shaped elastic suction valve 19 is provided which is held by a spring arm 18 and closes the upper end opening of the communication cylinder 13 by a ring-shaped foot 24 on the peripheral edge of the lower surface. A skirt-shaped elastic discharge valve 20 is provided around the inner peripheral wall of the supporting peripheral wall 15 so as to press-contact the upper inner surface of the inner peripheral wall to close the donut-shaped space between the inner peripheral wall and the peripheral wall and to close the nozzle pipe 16. The two valves 19, 20 are made in one piece.

The elastic dome 5 is also made of rubber or soft synthetic resin, and has a lower peripheral wall sandwiched between the inner and outer double peripheral walls of the supporting peripheral wall 15, and an outer peripheral wall branched from the lower peripheral wall to support the peripheral wall 15. A pressurizing chamber 21 is formed by being fixedly engaged with the outer surface of the outer peripheral wall of the above and being arranged so as to cover above the valve member 4.

The intake valve 6 is of a cylindrical shape with a lower cap made of rubber or soft synthetic resin, is arranged in a donut-shaped space between the mouth neck 7 and the communication cylinder 13, and has a thick portion at the top. The top and neck of the mouth / neck portion 7 and the top plate 8 of the screw cap 2 are interposed and fixed in the ring body 25, and the upper portion is sandwiched between the ring body 25 and the inner peripheral portion of the top plate 8 and fixed. The elastically deforming portion is brought into pressure contact with the outer surface of the communication cylinder 13 to interrupt the ventilation gap 9 at all times.

Reference numeral 26 denotes a cap-shaped pressing head, which has a band-shaped groove 27 formed in the lower inner periphery of the peripheral wall as shown in FIGS. 1 and 3a and a cutout groove 28 provided on one side. By passing the nozzle tube 16 through the notch groove 28, the outer surface of the elastic dome 5 is covered, and the engaging protrusions 29 at the lower edge of the band-shaped groove 27 are engaged with the engaging protrusions 30 at the outer surface of the upper part of the head member 3 to form the band-shaped groove 27. It is attached so that it can be pushed down by the groove width. However, the push-down head 26 may not be necessarily provided. FIG. 6B is a view in which the pressing head 26 is omitted.

The above-mentioned respective parts forming the main body of the injector except the container body 1 are pre-integrated and integrally assembled, and the main body is filled with the liquid, and then the container body 1 is inserted into the container body 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 liquid inside can be pressurized. With this pressurized liquid, the discharge valve 20 is pushed open to the outside from the nozzle pipe 16. Can be injected.

Further, when the compression of the elastic dome 5 is stopped, the dome 5 returns to its original shape and the discharge valve 20 is returned to the closed state at this time, so that the pressurizing chamber 21 becomes negative pressure, whereby the suction valve 19 Floats upward and opens the valve, and the liquid in the container body 1 is sucked into the pressurizing chamber 21 through the suction pipe 14, and the suction causes the container body 1 to become a negative pressure. 6 is opened, and the outside air is sucked into the container body 1.

[0021]

[Effect of the device]

 As described above, in the liquid injection device of 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 the elastic dome 5 alone, and the suction valve 19 and Since the discharge valve 20 is formed by one part of the valve member 4 and has a simple structure in which the number of parts of the injector main body is greatly reduced, it can be provided at low cost and is suitable for a sample.

[Brief description of drawings]

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

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

3A is an external perspective view of the same embodiment, and FIG. 3B is an external perspective view of another embodiment that does not use a pressing head.

[Explanation of symbols]

 1 container body 2 screw cap 3 head member 4 valve member 5 elastic dome 6 intake valve

Claims (1)

[Scope of utility model registration request] 1. A container body (1), a screw cap (2) screwed into a mouth / neck portion (7) of the container body (1), and a top plate (8) having a large opening in the center to form an inward flange shape, and the screw cap (2). On the outer surface portion, there is a mounting peripheral wall 10 and an inward flange 11 which are fitted and fixed by forming a ventilation gap 9 between the outer surface portion and the inward flange 11, and a standing peripheral wall 12 raised from the inner peripheral edge of the inward flange 11 is interposed. A small-diameter communication cylinder 13 is hung on the axial center of the mouth / neck portion 7, a suction pipe 14 that hangs inside the container body 1 is connected to the communication cylinder 13 and is supported from the outer peripheral edge of the inward flange 11. A peripheral wall 15 is provided upright, and a head member 3 in which a nozzle tube 16 is protruded outward from one side lower portion of the supporting peripheral wall 15 and a circumferential direction of an upper inner surface of a mounting cylinder 17 which is externally fitted and fixed to the standing peripheral wall 12. It is supported by spring arms 18 that extend inward in a spiral shape from several discrete places, and closes the upper end opening of the communication cylinder 13. Provided with an elastic suction valve 19,
In addition, the skirt-shaped elastic discharge valve 20 which reaches the inner surface of the upper portion of the peripheral wall 15 for support from the upper peripheral edge of the mounting cylinder 17 and closes the donut-shaped space between the upper end and the upper end of the mounting pipe 17 to close the nozzle tube 16 is surrounded. The valve member 4 provided, the elastic dome 5 for forming the pressurizing chamber 21 whose lower peripheral wall is supported and fixed to the supporting peripheral wall 15 to cover the upper side of the valve member 4, and the tubular jar of the lower jar, which is the mouth and neck. A liquid ejecting apparatus comprising a portion 7 and an elastic intake valve 6 arranged in a donut-shaped intake passage between the communication cylinder 13.