JPS6050500B2 - Manual small sprayer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a small hand-operated sprayer, particularly a pressure accumulator type compact sprayer.

The present applicant has filed many applications for manual, pressure accumulating type small sprayers, but the present invention is based on this ``-!-,
A pair of shoes, - - gran oil muna ratio, A1 Rare Al + Su JN.

Hereinafter, embodiments will be described with reference to the drawings together with the prior art.

Now, FIG. 1 shows a pressure accumulation type manual small-sized sprayer according to a previous application filed by the present applicant. In Fig. 1, 1 is a container body;
Reference numeral 2 designates the neck portion of the container, into which a small diameter cylinder 3 is vertically installed by placing an outward flange 4 attached to the mouth edge of the container via a packing 5 on the neck surface of the container body.
The small diameter cylinder has a suction valve 8 consisting of a valve seat 6 and a ball valve 7 on the inner surface of the bottom, and a fitting cylinder 10 into which a suction pipe 9 is fitted is vertically provided from the lower end. The lower part of the holding cylinder 11 is screwed into the neck of the container body.

A downward step 12 is provided on the inner surface of the intermediate portion, and an inner cylindrical portion 14 projects upward from the step 12, and an engaging protrusion 13 is provided on the inner surface of the upper end thereof. Said small diameter cylinder 3
The outward flange 4 is held between the top surface of the container body and its step 12. 15 is a spray head having a nozzle hole 16;
A peripheral wall 17 that can be pushed down between the upper part of the holding cylinder 11 and the inner cylinder part 14 is suspended from the periphery of the top wall, and is inserted through a passage pipe part 18 fitted to the back side of the top wall. A large diameter cylinder 19 having an inner diameter larger than the inner diameter of the previously described small diameter cylinder 3 is vertically disposed.

A valve hole 21 is bored in the center of the top wall 20 of the large-diameter cylinder i, and the valve hole communicates with the nozzle hole 16 through a passage provided in the passage pipe portion 18 and further on the back side of the top wall. The large diameter cylinder is inserted from below into the inner cylindrical portion 14 of the holding cylinder 11 described above, and the engaging protrusion 22 attached to the outer periphery of the lower end of the cylinder contacts the lower surface of the engaging protrusion 13 of the inner cylindrical portion 14. It is provided so that it can be moved up and down with this position as the upper limit. A flow pipe 23 is provided between the small diameter cylinder 3 and the large diameter cylinder 19.

The outer periphery of the lower end is a cylindrical small-diameter piston-like part 24, and the outer periphery of the upper end is a cylindrical large-diameter piston-like part 25, which is inserted into the small-diameter cylinder and the large-diameter cylinder, respectively.
However, in the one shown in FIG. 1, the flow path pipe 23 has a skirt-like part 26 formed at its intermediate part as well, so that the outside contacts the inner wall of the small-diameter cylinder with water, and for this purpose, it is formed of two members. A valve body 27 is protruded from the upper end of the flow pipe 23, and an engagement step 28 is formed on the inner surface of the small-diameter piston-shaped portion, and is installed between the step and the inner surface of the bottom of the small-diameter cylinder. The flow pipe 23 is urged upward by the elasticity of the coil spring 29, and the valve body 27 is pressed against the valve seat 21a of the valve hole 21 to close it, and the spray head 15 is forced upward through this. Forced. Furthermore, the valve body 27 and valve seat 2
1a forms a discharge valve 21b. In the figure, reference numeral 30 denotes a space-reducing insertion rod that is inserted through the coil spring 29 so that it is loosely inserted into the flow path pipe 23 when the spray head 15 is pushed down, but this is not always necessary. . The above-mentioned matters have already been filed by the present applicant (Japanese Unexamined Patent Publication No.
-789), and when the spray head 15 is pushed down, the small diameter cylinder 3 and flow pipe 23
When the inside of the pressurizing chamber 31 formed by the large-diameter cylinder 19 is pressurized and the pressure inside the chamber is increased due to the difference in the pressure-receiving areas of the large and small piston-shaped portions 25 and 24, the flow path pipe 23 automatically closes. Lower and discharge valve. 21b opens, and high-pressure liquid is atomized and ejected from the nozzle hole 16 of the spray head 15.

In this way, since the liquid is ejected after the liquid pressure has sufficiently increased, that is, the pressure has been accumulated, a better spray can be obtained from the beginning. When the spray head is released, the coil spring 29 causes the flow pipe 23,
The spray head 15 is pushed up, and as a result, the pressure in the pressurized chamber 31 becomes negative, the suction valve opens, and the liquid in the container body 1 flows into the pressurized chamber. Negative pressure caused by a decrease in liquid in the container body 1 is prevented by air flowing in through 3a provided above the small diameter cylinder 3 when the flow pipe 23 is lowered. The small hole is small enough to prevent liquid from leaking even if the sprayer falls over. By the way, the above-mentioned small-sized atomizer has an extremely good atomizing function and high performance. However, the large-diameter piston-shaped portion 25 at the upper end of the flow pipe 23 is simply formed into a piston-shape and is slidably fitted into the large-diameter cylinder 19, that is, the pressurizing chamber 31. Since the inside is under high pressure, if the fit is not good during manufacturing, it may cause liquid leakage and leak to the outside.If you try to prevent this, it will have to be made with very high precision, which will be expensive. As the mutual fitting becomes tighter, frictional resistance to sliding increases, and a strong force is required to push down the spray head 15. The present invention aims to improve this point, and in the atomizer having the above structure, an inner cylinder 32 is provided inside the large-diameter cylinder 19 from the large-diameter cylinder top wall 20, and a large-diameter piston-shaped portion is provided. As 25, a flexible bottom wall 34 is protruded from the upper outer periphery of the flow path pipe 23 in the form of a flange, and the bottom wall 3
A peripheral wall 35 is made to protrude upward from the tip of the cylinder 4, and the peripheral wall 35 is fitted and fixed between the large diameter cylinder 19 and the inner cylinder 32.

The flow pipe 23 and the large-diameter piston-shaped portion 25 are integrally molded from soft synthetic resin. With the above configuration, when the internal pressure (liquid) inside the large diameter cylinder 19, that is, inside the pressurizing chamber 31 becomes high pressure, this pressure is applied to the bottom part 34 of the large diameter piston-shaped part 25, so the bottom part 34 is bent and pushed down. , flow pipe 23
is pushed down to open the discharge valve 21b, and when the internal pressure is reduced, it returns to close the discharge valve 21b. Therefore, the operation is substantially the same as with the pre-improved large diameter piston-like portion 25, but it does not slide as in the case of the pre-improved large-diameter piston-like portion 25. According to the present invention, the bottom part 34 of the large-diameter piston-like part provided at the upper part of the flow path pipe 23 is flexible, and the peripheral wall 35 of the large-diameter piston-like part is arranged inside the large-diameter cylinder 19. Since the large-diameter cylinder 19 and the peripheral wall 35 of the large-diameter piston-shaped portion 25 are fitted and fixed in water, the adhesion between the large-diameter cylinder 19 and the peripheral wall 35 of the large-diameter piston-like portion 25 is high, and the internal pressure (liquid) inside the large-diameter cylinder 19 is considerably high. There will be no liquid leakage between the two, and no liquid will leak outside.

Therefore, liquid leakage caused by the large-diameter piston-shaped portion sliding within the large-diameter cylinder 19 is improved. In addition, since such sliding is not involved and the flexibility of the bottom portion 34 of the large diameter piston-shaped portion 25 is used, the frictional resistance of sliding is eliminated, and the pressing down of the spray head 15 becomes easier, and the above-mentioned sliding The parts do not require high precision as in the case of , and are inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view showing a prior art small manual sprayer, FIG. 2 is a cutaway side view of a small manual sprayer according to the present invention, and FIG. 3 is an enlarged sectional view of the main part of FIG. 2. 1...Container body, 3...Small diameter cylinder,
11... Holding tube, 15... Spray head, 19
...Large diameter cylinder, 21b...Discharge valve,
23...Flow path pipe, 25...Large diameter piston-shaped portion, 34...Bottom wall, 38...Peripheral wall.

Claims (1)

[Claims] 1. A small diameter cylinder 3 fixed to the container body side and provided with a suction valve 8 on the inner surface of the lower end, and vertically above the small diameter cylinder by an appropriate holding means so as to be able to move up and down over a certain range and held in a vertical position. A spray head 15 has a large-diameter cylinder 19 and has a discharge path from a valve hole 21 provided in a top wall 20 of the cylinder to a nozzle hole 16, and a small-diameter piston-shaped portion 24 having a cylindrical outer periphery at its lower end. In addition, the outer periphery of the upper end is formed into a cylindrical large-diameter piston-like part 25, the lower part is urged upward into the small-diameter cylinder and the upper part is forced upward into the large-diameter cylinder, and inserted into the water honey, and from a part of the upper end. , and a flow path pipe 23 formed by protruding a valve body 27 which forms a discharge valve 21b by the valve hole 21, and when the spray head 15 is pushed down, the flow between the suction valve 8 and the discharge valve 21b is In a small manual sprayer, the inside of the pressurized chamber 31 consisting of the inside of the small-diameter cylinder, the inside of the flow pipe, and the inside of the large-diameter cylinder is pressurized, and the flow pipe is lowered by the pressure, and the discharge valve is opened. As the large-diameter piston-shaped portion 25, a flexible bottom wall 34 is protruded from the upper outer periphery of the flow path pipe 23 in the shape of a flange, and the peripheral wall 3 is protruded from the tip thereof.
5 protrudes upward, and the peripheral wall 35 is fitted and fixed inside the large diameter cylinder 19.