JP2002035654A - Spray container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray container capable of constantly discharging the fixed quantity of contents by preventing the generation of variation of the discharged quantity of every container. SOLUTION: The spray container is provided with a cap fixed to a container body with screwing, a cylinder, a stem, a piston guide engaged with the inside of the stem, a piston engaged with between the stem and the piston guide, a head with nozzle engaged with the upper end of the stem, a 1st spring arranged between the stem and the cylinder and a 2nd spring arranged between the stem and cylinder and the stroke of the piston is controlled by providing a step part inside the cylinder and allowing the lower end of the piston descending when the head with nozzle is pushed down to contact with the step part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray container for ejecting contents such as perfume and hair styling contained in a container.

[0002]

2. Description of the Related Art Such a spray container is disclosed, for example, in Japanese Utility Model Publication No. 54-39693.

[0003] This container comprises a guide cylinder screwed to the container, a small-diameter cylinder fixed inside the container by the guide cylinder, a first valve element housed in the small-diameter cylinder,
A small diameter piston sliding inside the small diameter cylinder, a coil spring interposed between the small diameter piston and the first valve body,
A spray head, a large-diameter cylinder attached to the spray head, a second valve body housed in the large-diameter cylinder, and a large-diameter piston attached to the second valve body, a small-diameter cylinder and a first valve body Thereby forming a first check valve, and the large-diameter cylinder and the second valve body form a second check valve. Further, a flow path pipe is formed between the small diameter cylinder and the large diameter cylinder.

In this container, when the liquid is put into the container and the spray head is pushed down for the first time, the first and second check valves are both closed, so that a small-diameter cylinder,
The air inside each of the flow pipe and the large-diameter cylinder is pressurized. At this time, the pressurized air acts to push up the small-diameter piston, while pushing down the large-diameter piston. In addition, since the pushing force of the coil spring also acts, if the large-diameter piston pushing force due to air pressure exceeds the sum of the small-diameter piston pushing force due to air pressure and the pushing force of the coil spring, the second valve element descends, and the second The check valve opens and the pressurized air is discharged. Next, when the spray head is released, the small-diameter piston is pushed up by the coil spring, and the inside of the small-diameter cylinder becomes negative pressure, and the liquid in the container flows into the small-diameter cylinder through the first check valve. Thereafter, when the spray head is depressed, air is discharged from both the cylinders and the inside of the flow path tube, and instead, a liquid enters and the liquid can be ejected.

[0005] In such a spray container, there is a problem that the stroke of the piston also varies due to the variation in the length and characteristics of the coil spring, and the discharge amount varies from container to container.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and prevents the occurrence of variations in the discharge amount of each container.
The present invention proposes a spray container that can always discharge a fixed amount of contents.

[0007]

That is, the present invention provides a cap fixed to a container main body, a cylinder fixed to the container main body with the cap fixed to the container main body, and a vertical A stem extending movably, a piston guide fitted inside the stem, a piston fitted between the stem and the piston guide, and a head with a nozzle fitted to the upper end of the stem And a first spring disposed between the cylinder and the piston guide, and a second spring disposed between the stem and the piston, wherein the content in the container body is transmitted from the nozzle. In the spray container to be sprayed, a stepped portion is provided on the inner surface of the cylinder, and when the head with the nozzle is pushed down, the lower end of the piston descending with this is pressed against the stepped portion. By, it is characterized in that defining the stroke volume of the piston.

In the spray container according to the present invention, a stepped portion is provided inside the cylinder, and the stroke of the piston is regulated by bringing the lower end of the piston sliding inside the cylinder into contact with the stepped portion. . Thus, it is possible to prevent a variation in the stroke of the piston that occurs for each container due to a variation in the length and characteristics of the spring, and to always discharge a constant amount of the contents.

[0009]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a spray container according to the present invention. The illustrated spray container 10 includes a cap 12 fixed to the container body 11 by screwing, a cylinder 13, and a hollow stem 14 extending into the cylinder 13.
And a piston guide 15 fitted inside the stem 14, and a piston fitted between the stem 14 and the piston guide 15.
16, a head 17 with a nozzle fitted to the upper end of the stem 14,
It comprises a first spring 18 arranged between the cylinder 13 and the piston guide 15, and a second spring 19 arranged between the stem 14 and the piston 16.

A ball valve comprising a ball 20 and a pedestal 21 is formed near the bottom of the cylinder 13, and a suction pipe 22 is attached to the lower end of the cylinder 13. On the other hand, a nozzle 23 for spraying the contents in the container body 11 is attached to the nozzle-equipped head 17.

Further, a liquid chamber 24 is formed by the inner wall of the cylinder 13 and the piston 16, and an air chamber 25 is formed by the inner wall of the cylinder 13 and the stem 14 and the piston 16. Here, the air chamber 25 is isolated from the contents in the container body 11, and the second spring 19 arranged in the air chamber 25 does not contact the contents. Thereby, pressure based on factors other than the load of the second spring 19 is not applied to the piston 16,
The load of the second spring 19 leading to the spraying operation can be easily set. Further, since only the load of the spring needs to be considered for the spraying operation, it is easy to set the pressure lightly.

Here, as shown in the drawing, a stepped portion 26 is provided on the inner wall of the cylinder 13. In this container 10, when the nozzle-equipped head 17 is pushed down, the stem 14 and the piston 16 descend accordingly. When the piston 16 descends by a predetermined distance, its lower end comes into contact with the step portion 26, and the piston 16 stops descending. By making the position where the stepped portion 26 is provided constant, the stroke amount of the piston 16 is defined, and as a result, the discharge amount of the contents in the container body 11 can be always kept constant.

Next, in consideration of smooth assembly in the assembly process, projections 27 and 28 forming steps are formed on the stem 14.
On the other hand, notched grooves 29 are formed in the piston guide 15, respectively, and by fitting these, the two are undetachably connected and integrated. Also,
The stem 14 has grooves 30 and 31 for allowing the contents to pass through,
Similarly, grooves 32 and 33 are formed in the piston guide 15. These are shown in detail in FIG.

As described above, in the spray container according to the present invention, a step is provided inside the cylinder, and the lower end of the piston sliding inside the cylinder is brought into contact with the step to regulate the stroke of the piston. are doing. Thus, it is possible to prevent a variation in the discharge amount generated for each container due to a variation in the length and characteristics of the spring, and to always discharge a constant amount of contents.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a spray container according to the present invention.

FIG. 2 is a sectional view taken along lines AA and BB in FIG. 1;

[Explanation of symbols]

 10 Spray container 11 Container body 12 Cap 13 Cylinder 14 Stem 15 Piston guide 16 Piston 17 Nozzle head 18 First spring 19 Second spring 20 Ball 21 Pedestal 22 Suction pipe 23 Nozzle 24 Liquid chamber 25 Air chamber 26 Cylinder inner surface Step 27, 28 Projection 29 Notch groove 30-33 groove

Claims (1)

[Claims] 1. A cap fixed to a container main body, a cylinder fixed to the container main body together with fixing of the cap to the container main body, and a stem vertically movably extended into the cylinder. A piston guide fitted inside the stem, a piston fitted between the stem and the piston guide, a nozzle-equipped head fitted to the stem upper end, the cylinder and the piston guide, A spray container comprising a first spring disposed between the stem and the piston, and a second spring disposed between the stem and the piston, wherein the spray nozzle ejects the contents in the container body from the nozzle; The lower end of the piston, which is lowered when the head with the nozzle is pressed down, is brought into contact with the stepped portion so that the piston is moved downward. Spray container, characterized in that defining the stroke volume.