JP3889557B2 - Spray container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spray container for ejecting and using contents such as perfume and hair styling contained in a container.
[0002]
[Prior art]
An example of such a spray container is described in Japanese Utility Model Publication No. 54-39693.
[0003]
The container includes a guide cylinder screwed to the container body, a small-diameter cylinder fixed inside the container body by the guide cylinder, a first valve body accommodated in the small-diameter cylinder, and a small-diameter piston that slides 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 accommodated in the large diameter cylinder, and the second A large-diameter piston attached to the valve body, a first check valve is formed by the small-diameter cylinder and the first valve body, and a second check valve is formed by the large-diameter cylinder and the second valve body. . Furthermore, a flow path pipe is formed between the small diameter cylinder and the large diameter cylinder.
[0004]
In this container, when the liquid is put into the container body and the spray head is pushed down for the first time, the first and second check valves are both in the closed state, so that the air inside the small diameter cylinder, the flow path pipe and the large diameter cylinder respectively. Is pressurized. At this time, the pressurized air acts to push up the small diameter piston and to push down the large diameter piston, respectively. In addition, since the pushing force of the coil spring also acts, when the large-diameter piston pushing force by the air pressure exceeds the sum of the small-diameter piston pushing force by the air pressure and the pushing force of the coil spring, the second valve body moves down, 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, 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 pushed down, air is discharged from both the cylinders and the flow path pipe, and instead of this, liquid enters and this liquid can be ejected.
[0005]
In such a spray container, there is a problem that a difference occurs in the stroke of the piston due to variations in the length and characteristics of the coil spring, and the discharge amount varies from container to container.
[0006]
[Problems to be solved by the invention]
The present invention solves the above-described problems, and proposes a spray container that can always discharge a fixed amount of contents while preventing the variation in the discharge amount of each container.
[0007]
[Means for Solving the Problems]
That is, the present invention provides a cap that is fixed to the container body, a cylinder fixed to the container body together with the fixing to the container body of the cap, on the inside of the movable extending perilla vertically in the cylinder A stem formed with a protrusion, a piston guide formed outside with a notch groove for fitting with the protrusion inside the stem, a piston fitted between the stem and the piston guide, and the stem A nozzle head fitted into the upper end; a first spring disposed between the cylinder and the piston guide; and a second spring disposed between the stem and the piston. Further, in the spray container for ejecting the contents in the container body, a stepped portion is provided on the inner surface of the cylinder, and when the head with nozzle is pushed down, the pis By abutting the lower end of the on to the stepped portion, thereby defining the stroke volume of the piston, the inside of the stem, is characterized in that a groove for passing the contents .
[0008]
In the spray container according to the present invention, a stepped portion is provided inside the cylinder, and the lower end of the piston sliding inside the cylinder is brought into contact with the stepped portion to regulate the stroke amount of the piston. Thereby, it is possible to prevent variations in the stroke of the piston caused by variations in the length and characteristics of the springs and to discharge a constant amount of contents at all times.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0010]
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, a hollow stem 14 extending into the cylinder 13, and a piston guide 15 fitted inside the stem 14. A piston 16 fitted between the stem 14 and the piston guide 15, a head 17 with a nozzle fitted to the upper end of the stem 14, and a first arranged between the cylinder 13 and the piston guide 15. A spring 18 and a second spring 19 disposed between the stem 14 and the piston 16 are provided.
[0011]
A ball valve including a ball 20 and a base 21 is formed in the vicinity of 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 main body 11 is attached to the head 17 with a nozzle.
[0012]
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, 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 disposed 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, and the load setting of the second spring 19 leading to the spraying operation can be easily performed. Further, regarding the spraying operation, it is only necessary to consider the spring load, so that it is possible to easily set the pressure lightly.
[0013]
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 are lowered accordingly. When the piston 16 is lowered by a predetermined distance, the lower end of the piston 16 comes into contact with the stepped portion 26, and the lowering of the piston 16 is stopped. 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 always be kept constant.
[0014]
Next, in consideration of smooth assembly in the assembly process, the stem 14 is provided with projections 27 and 28 that form stepped portions, while the piston guide 15 is provided with a notch groove 29. By combining them, they are combined so that they cannot be pulled out and integrated. Further, grooves 30 and 31 for allowing the contents to pass therethrough are formed in the stem 14, and similarly, grooves 32 and 33 are formed in the piston guide 15. These are shown in detail in FIG.
[0015]
As described above, in the spray container according to the present invention, a step is provided on the inner side of the cylinder, and the lower end of the piston sliding inside the cylinder is brought into contact with the step so as to regulate the stroke amount of the piston. . Accordingly, it is possible to prevent a variation in the discharge amount generated for each container due to variations in the length and characteristics of the spring, and to discharge a constant amount of contents at all times.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a spray container according to the present invention.
2 is a cross-sectional view taken along lines AA and BB in FIG. 1. FIG.
[Explanation of symbols]
10 spray containers
11 Container body
12 cap
13 cylinders
14 stem
15 Piston guide
16 piston
17 Head with nozzle
18 First spring
19 Second spring
20 balls
21 pedestal
22 Suction tube
23 nozzles
24 liquid chamber
25 Air chamber
26 Stepped part on the inner surface of the cylinder
27, 28 protrusion
29 Notch groove
30-33 groove

Claims (1)

A cap fixed to the container body, a cylinder fixed to the container body together with the fixing to the container body of the cap, to form a protrusion on the inside of the movable extending perilla vertically in the cylinder A stem, a piston guide formed on the outside with a notch groove that fits with the protrusion inside the stem, a piston fitted between the stem and the piston guide, and a top end of the stem A head having a nozzle; a first spring disposed between the cylinder and the piston guide; and a second spring disposed between the stem and the piston. In a spray container that ejects the contents of
A stepped portion is provided on the inner surface of the cylinder, and when the head with nozzle is pushed down, the lower end of the piston, which is lowered with the stepped portion, is brought into contact with the stepped portion, thereby defining the stroke amount of the piston. As well as
A spray container , wherein a groove for allowing the contents to pass therethrough is formed inside the stem .

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