JPS5815017Y2 - sprayer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a sprayer that sucks liquid contained in a liquid storage means such as a container into a cylinder by sliding a piston and then sprays it out under pressure.

The present applicant has invented a pressure accumulating type sprayer that can always perform good spraying regardless of the descending speed of the piston sliding in the large-diameter and small-diameter cylinders.
The patent application was submitted to the Japan Patent Office on March 29, 2017.

According to the above patent application, a small-diameter cylinder is arranged above and a large-diameter cylinder is arranged below, and the descending speed of the small-diameter piston in the small-diameter cylinder is set higher than that of the large-diameter piston in the large-diameter cylinder. ing.

The small-diameter piston is formed with a first flow path with an annular groove and a second flow path that communicates with the outside, and a seal portion formed on the valve shaft that moves together with the large-diameter piston is formed. The first flow path is fitted in a fluid-tight manner.

Therefore, when the small-diameter piston is pressed, the small-diameter piston descends relative to the large-diameter piston and the valve stem due to the difference in descending speed, and when the small-diameter piston descends a certain distance, the seal part of the valve stem enters the annular groove. An annular gap is formed between the seal portion and the annular groove.

The liquid pressurized by the lowering of the small-diameter piston is sprayed from this gap through the spinner button and the nozzle.

When the small-diameter piston further descends a predetermined distance, the free end of the valve rod comes into contact with the valve seats formed on the shoulders of the first and second passages, or is fitted into the second passage in a liquid-tight manner. As a result, spraying has ended.

This invention is an improvement on the type of sprayer disclosed in the above patent application, and aims to provide a sprayer that can spray with a light touch by reducing the sliding resistance when the small-diameter piston descends.

Therefore, according to one embodiment of this invention, a seal portion is formed on the small diameter piston that is lowered by finger pressure, and the large diameter piston/
An annular groove is formed in the valve stem connected to the valve stem.

The above-mentioned patent requires a seal portion to be formed on a small-diameter piston made of an elastic material such as rubber, and because the downward speed of the small-diameter piston is greater than that of a large-diameter piston, the seal portion is formed on a valve stem made of plastic. Compared to the atomizer disclosed in the application, the sliding resistance of the small-diameter piston is reduced due to the seal portion, and the finger pressure required to lower the small-diameter piston is reduced, so that spraying can be performed with a light touch.

Embodiments of this invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, the sprayer 10 includes a small-diameter piston 12 that is pressed by finger pressure, and a seal portion 14 consisting of an annular projection is integrally formed on the small-diameter piston.

A valve stem 16 that moves integrally with a large-diameter piston (not shown) while slidingly contacting this seal portion 14 is formed in a stepped shape with a small-diameter portion 17 of a predetermined length, and the small-diameter portion forms an annular groove. 18 (see Figure 2).

The large diameter piston moves inside the large diameter cylinder 20, and the small diameter piston 1
2 are configured to slide within a small diameter cylinder 22 fitted within a large diameter cylinder, and these pistons are all made of an elastic material such as rubber to reduce sliding resistance. .

Biasing means, such as a compression coil spring 24, is disposed within the small diameter cylinder 22 to bias the small diameter piston 12 upwardly.

When the small-diameter piston 12 is pressed down and lowered, the liquid in the chamber 25 of the small-diameter cylinder 22 will flow as the small-diameter piston descends because the valve stem 16 is fluid-tightly fitted to the seal portion 14. Pressurized.

Since the descending speed of the small diameter piston 12 in the small diameter cylinder 22 is relatively higher than the descending speed of the valve rod 16 connected to the large diameter piston in the large diameter cylinder, if the small diameter piston descends a certain distance, the seal portion 14 will close. It enters the annular groove 18.

Therefore, the pressurized liquid in the chamber 23 flows from the annular groove 18 into the flow path 26 in the small diameter piston and the spinner (not shown)
The liquid is turned into a vortex and is ejected to the outside from the ejection hole of a nozzle (not shown).

Thereafter, the small-diameter piston further descends and the valve stem 16 is again liquid-tightly fitted to the seal portion 14, thereby completing the spraying.

The length of the small diameter portion 17 of the valve stem 16 is determined in consideration of the spray time, the amount of spray, the descending distance of the small diameter piston, and the like.

As shown in Figure 3, without making the valve stem into a stepped shape,
An elongated groove 26 may be formed on the valve stem surface.

Although four vertical grooves 26 are formed in FIG. 3, it is also possible to form one or two, or five or more depending on the type and amount of liquid to be ejected. not.

Further, the small-diameter piston 12 is designed to be able to rotate around the valve stem 16, but in order for the small-diameter piston to descend without rotating, the seal portion 14 is formed of, for example, three partially spherical protrusions instead of an annular shape. However, three vertically elongated guides 28 having a shape corresponding to that of the valve stem 15 in which the seal portion is fitted may be formed extending downward from the upper end of the valve stem.

Alternatively, the valve rod 18 may be fixed and only the small diameter piston 12 may be moved down.

As mentioned above, according to this invention, a seal portion is formed on a small diameter piston made of an elastic material, and the descending speed of this small diameter piston is greater than that of the valve stem that is fluid-tightly fitted with the seal portion. The sliding resistance of the small diameter piston is reduced,
The finger pressure required to lower the small diameter piston is reduced, thus allowing spraying to be performed with a lighter touch.

[Brief explanation of drawings]

Fig. 1 is a partial vertical cross-sectional view of a sprayer according to an embodiment of the invention, Fig. 2 is a cross-sectional view of the valve stem taken along the line ■-■ in Fig. 1, and Figs. FIG. 3 is a cross-sectional view of another valve stem, each similar to FIG. 2; 10... Sprayer, 12... Small diameter piston, 14...
・Small diameter piston seal part, 16... Combined rod, 11...
Small diameter portion of valve stem, 18... annular groove, 26... longitudinal groove, 28... guide groove.

Claims (1)

[Claims for Utility Model Registration] (1) In a sprayer that prevents liquid from being sprayed by fitting a valve stem liquid-tightly into a piston that descends with finger pressure, When the piston moves down a certain distance with respect to the valve stem, the liquid-tight fit with the seal part is released, and when the piston moves down a certain distance, a liquid-tight fit with the seal part is formed. A sprayer characterized in that a fitting groove is formed on the valve stem for resetting the valve. (The fitting groove with the seal part is formed by the small diameter part of the valve stem made in a stepped shape.
Sprayer as described in section. (3) The fitting groove with the seal portion is formed by a vertical groove formed on the circumferential surface of the valve stem.Claim 1 of Utility Model Registration
Sprayer as described in section. (4) The sprayer according to any one of claims 1 to 3, wherein the seal portion of the piston is constituted by an annular projection. (5) The seal portion of the piston is composed of a partially spherical protrusion, and the valve stem is provided with a vertically elongated guide groove in which the protrusion is fluid-tightly fitted. Any sprayer described above.