JPH0137718Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement in a small hand-operated sprayer.

As is well known, in this type of sprayer, the spray head is pushed down against a return spring to pressurize the liquid in the cylinder, thereby opening the discharge passage and spraying. Until the discharge passage is opened, the liquid is also pressurized at the same time, requiring a larger pressing force than necessary.

In consideration of the above points, the present invention is equipped with a hydraulic pressure relief piston in the pressurized chamber of the cylinder that releases pressure exceeding the liquid pressure required for discharging, thereby reducing the force required to push down the spray head during spraying. The purpose of this invention is to provide a small-sized atomizer.

The present invention and embodiments will be described below with reference to the accompanying drawings. It is a mounting member that protrudes, and is threadedly mounted on the outer surface of the mouth and neck portion 6 of the container body 5 through a threaded groove on the inner circumference of the peripheral wall 3 for mounting. A cylinder 8 vertically installed inside the cylinder 5 is fixed with a presser. Note that a guide tube 9 is formed at the inner peripheral end of the inward flange 4.

A spherical suction valve 10 is installed in the bottom opening of the cylinder 8, and a suction pipe 11 hanging down from the inner bottom of the container body 5 is connected and fixed to the lower end of the bottom.
Further, a rod member 12 is erected at the axial center of the cylinder 8 and extends upwardly from the lower part. The rod member 12 has a lower end fixed to the lower inner periphery of the cylinder 8 by a radial attachment member (not shown), and an upper end formed into a cup-shaped leakage prevention valve body 13 with an enlarged diameter.

An engagement tube 15 having a spray head 14 suspended from its periphery is provided on the inner periphery of the guiding peripheral wall 2 so as to be able to be pressed down and in sliding contact therewith. The spray head 14 has a nozzle hole 16 on one side and a connecting cylinder 17 hanging down from the bottom surface. A stem 18 that fits and hangs downwardly is fitted and fixed with an appropriate gap formed between the two.

The lower end of the stem 18 is formed into a cylindrical piston 19 whose diameter is enlarged in a stepped manner and slides into contact with the cylinder 8.
A cylindrical body 21 that hangs below 9 and has a short outward flange 20 at its hanging end is integrally fitted and fixed as a lower end member of the stem, and on the outer surface of this cylindrical body 21,
A cylindrical free piston 22 is provided which slides on this outer surface and the inner surface of the cylinder 8 and can move up and down between the flange 20 and the piston 19. Further, the liquid leakage prevention valve body 1 is provided on the inner peripheral surface of the stem 18 midway.
There is a narrow diameter portion 23 that functions as a valve seat in contact with the outer surface of the stem 18, and a spherical discharge valve 24 is provided at the upper end of the stem 18.

Reference numeral 25 denotes a return spring, which constantly pushes the stem 18 and the spray head 14 upward through the cylindrical body 21, and in this state, the valve seat 23 of the stem 18 is pressed against the outer surface of the leakage prevention valve body 13. , prevent liquid leakage. 2
6 is a through hole made in the cylinder 8.

Next, to explain the operation of the above structure, let us assume for convenience that the cylinder 8 is filled with the sucked up liquid, and then push the spray head 14 downward against the return spring 25. By releasing the pressure contact of the valve seat 23 against the liquid leakage prevention valve body 13 and pressurizing the liquid in the cylinder 8, this pressurized liquid passes through the gap between the valve body 13 and the stem 18 and is discharged from the discharge valve 24. is ejected from the nozzle hole 16 by opening the valve. After this ejection, if you stop pressing down the spray head 14, the spray head 14, stem 18 and cylinder 21
is pushed up by the return spring 25 and returns to the state shown in the figure, and due to this return, the suction valve 10 opens and the liquid in the container body 5 is sucked into the cylinder 8.
Prepare for the next spray operation.

Here, in the present invention, a free piston 22 is provided in the cylinder 8, and this free piston 22 is activated when the spray head 14 is initially pressed down, that is, when the valve seat 23 of the stem 18 is not completely separated from the valve body 13.
Therefore, the discharge passage has not yet opened, and therefore, when the liquid pressure becomes higher than necessary, it is pushed upward and moves, releasing and relieving the liquid pressure, thereby reducing the downward force on the spray head 14. be able to.

In the above embodiment, the nozzle hole 16 has a straight opening, but the injection liquid may be spun around the opening and ejected.

As described above, in the present invention, a free piston 22 that can move up and down is provided in the cylinder 8, and when the spray head 14 is pressed down during spraying, the free piston 22
is moved upward by the rapidly increasing hydraulic pressure in the cylinder 8 to relieve the hydraulic pressure, so a small atomizer can be provided in which the force required to push down the spray head 14 can be reduced.

[Brief explanation of the drawing]

The accompanying drawing is a half longitudinal sectional front view of an embodiment of the small atomizer of the present invention. DESCRIPTION OF SYMBOLS 1... Mounting member, 5... Container body, 8... Cylinder, 14... Spray head, 18... Stem, 2
2...Free piston.

Claims (1)

[Scope of utility model registration request] A suction valve 10 and a suction pipe 11 are provided at the bottom opening, and a rod member 12, which is formed into a liquid leakage prevention valve body 13 whose upper end is enlarged in diameter and extends upward, is fixed to the internal axis. A cylinder 8 installed inside the mouth of the container body 5 and a lower part thereof are fixed in communication with a cylindrical piston 19 inside this cylinder 8, and are fitted with an appropriate gap on the outer surface of the rod member 12 and erected upward. is,
A stem 18 has a spray head 14 having a nozzle hole 16 at its upper end in which a discharge valve 24 is installed and is fixed in communication with the stem 18 and has a valve seat 23 with a narrowed inner circumference in the middle, and an outer surface of the lower end of the stem 18 below the piston 19. A cylindrical free piston 22 that can be moved up and down is provided in the cylinder 8 and pushes up the spray head 14 upward through the stem 18, and constantly presses the valve seat 2.
Return spring 2 that presses 3 against the valve body 13 to close the valve.
A small sprayer consisting of 5.