JPH0639809Y2 - Liquid ejector nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a nozzle of a liquid ejector.

"Prior Art" The trigger type liquid ejector shown in FIG. 9 is already well known, but this trigger type liquid ejector is provided with a pump chamber 4 on a container 3 and a front portion of the pump chamber. A trigger 1 is vertically oscillated from the bottom of the pump chamber so that the trigger operates a pump in a pump chamber 4 via a rod 2; and a nozzle 5 is provided at the front end of the pump chamber 4. By operating the pump through the rod 2 by operating the trigger 1, the liquid is sucked from the container 3 and pressurized to increase the pressure, and the high-pressure liquid is ejected from the nozzle hole of the nozzle 5. There is.

The nozzle 5 has a nozzle body having a nozzle hole at its center, which is rotatably fitted onto the tip portion (high-pressure liquid discharge end) of the pump chamber 4 in which a liquid guide is fitted and fixed. Depending on the moving position, there are three types of states: bubble, straight, and closed, that is,
Any one of the three states can be arbitrarily selected so that the content liquid is jetted in the form of foam or as it is in the form of filamentous water, or any of them is prevented from being blocked.

[Problems to be Solved by the Invention] Conventionally, as a foaming means, a foaming cylinder is arranged in the nozzle hole front surface of a nozzle body in the nozzle 5, but this foaming cylinder is a simple cylinder. Therefore, the spray liquid that has collided with the inner surface of the foam-making cylinder is changed in direction at a substantially constant angle and is scarcely changed, and it is difficult to say that foaming is efficiently performed.

By the way, it has been proposed that an inward flange is formed on the inner peripheral edge of the tip of the foam-making cylinder so that the spray liquid collides with the inward flange (JP-A-59-82964).

However, in such a configuration, since the inward flange serves as a baffle plate against the ejection of the foam, not only is the ejection of the foam hindered, but the foam produced in the middle or rear part of the polygonal foam tube is It may even be defoamed by the inward flange.

In consideration of these points, the present invention aims to provide a nozzle of a liquid ejector including a foaming cylinder capable of fine and efficient foaming.

"Means for Solving the Problem" In the present invention, in a nozzle of a liquid ejector in which a foam forming cylinder 7 is arranged in the front face portion of a nozzle hole 6 of a nozzle body 5a, a middle part or a rear portion of the inner wall surface of the foam forming cylinder 7 The uneven surface portion 8 is formed on the surface.

"Action" The foam-making cylinder 7 redirects the spray liquid colliding with its inner surface,
At this time, air is blown in to foam, but as described above, the concave-convex surface portion 8 is formed on the inner wall surface of the foam-making cylinder 7 in the middle or rear part, that is, at the portion of the inner wall surface of the foam-forming cylinder 7 that works best for foam formation.
Therefore, the spray liquid colliding with the inner surface of the foam-making cylinder 7 is strongly irregularly reflected by the uneven surface portion 8 and is redirected, and these are frequently generated in the narrow foam-making cylinder 7, and are scattered and disturbed, so that air is generated. It will be sufficiently mixed by stirring. Therefore, foaming is improved, and fine and efficient foaming is performed.

[Embodiment] FIGS. 1A and 1B show a first embodiment of the present invention, in which a liquid guide 5b is internally fitted and fixed to the tip (high pressure liquid discharge end) of the pump chamber 4, 5a. Is a nozzle body 6 having a substantially triangular front face, which has a nozzle hole 6 formed in the center and is rotatably fitted to the tip of the pump chamber 4 immediately before the liquid guide 5b. Is a foaming cylinder fitted inside the nozzle body, and the nozzle 5 is formed by these. Thus, the nozzle 5 can be rotated to the "foam" position, the "straight" position, and the "closed" position.

FIG. 1 shows the “bubble” position, in which the shallow grooves 10, 10 of the stopper 9 of the liquid guide 5b open the liquid passages 11, 11 and the spin groove 12, and the high-pressure liquid is supplied. Then, the high-pressure liquid is rotated at a high speed by the spin groove 12 and ejected in a mist state from the nozzle hole 6, which collides with the inner wall surface of the foam-making cylinder 7 to be foamed.

When the nozzle body 5a is rotated to the “straight” position, the deep grooves (not shown) of the plug body 9 in different directions allow the liquid passages 11 and 11 to directly communicate with the nozzle hole 6, and the high-pressure liquid is directly spun into a nozzle. It is injected through the hole 6 and, in the "closed" position, the shallow groove 10,1 of the plug 9
0, the portion not provided with the deep groove is located so as to block the liquid passages 11, 11 from the nozzle hole 6 and the spin groove 12, and the gaps are cut off.

The foam forming cylinder 7 has a large-diameter mounting cylinder 13 integrally formed on the outer periphery thereof, and the mounting cylinder 13 is internally fitted and fixed to the peripheral wall 14 projecting to the front side of the nozzle body 5a. And an appropriate gap is provided between them. The foam forming cylinder 7 and the mounting cylinder 13 are integrated into a front end plate, and several air intake holes in the circumferential direction are formed in this end plate.
There are 15 holes. 16 is an engaging protrusion on the outer surface of the mounting cylinder 13,
It engages with the engagement groove 17 on the inner surface of the peripheral wall 14.

The concavo-convex surface portion 8 on the inner wall surface of the foam-making cylinder 7 is formed in a substantially half portion (almost half portion) near the nozzle hole 6 with which the spray liquid from the nozzle hole 6 collides. It has an uneven shape.

The uneven surface portion 8 is not limited to the embodiment of FIG. 1 as long as the intermediate portion or the rear portion of the inner wall surface of the foam making tube 7 has an uneven shape.

2 to 7 show different concave and convex surface portions 8, respectively, in which FIG. 2 is recessed in a thread groove, and FIG. 3 is a plan view in which a large number of ring-shaped projections are projected in the direction of the mother ship. The figure shows a large number of ring-shaped circumferential grooves recessed in the generatrix direction, Fig. 5 shows a large number of protrusions, Fig. 6 shows a large number of small holes, and Fig. 7 shows small projections of a plane triangle that are scattered in the circumferential direction. The inner wall surface is provided with a concave-convex shape.

In each of the above-described embodiments, the foaming cylinder 7 is formed separately from the nozzle body 5a as an independent component, but may be formed integrally with the nozzle body 5a. FIG. 8 shows an example of this case. When the foam making cylinder 7 is integrated with the nozzle body 5a, the air intake hole
If 15 is provided on the front side, die cutting cannot be performed. Therefore, in this example of FIG. 8, the air intake hole 15 is provided in the side portion.

Each of the above parts is molded and manufactured from a synthetic resin material.

[Advantages of the Invention] As described above, in the present invention, the uneven surface portion 8 is formed on the inner wall surface or the rear portion of the inner wall surface of the foam-making cylinder 7, and the liquid ejected from the nozzle hole 6 is redirected by the uneven surface portion 8 into a diffuse reflection. Since it is formed as described above, the uneven surface portion 8 is formed on the portion of the inner wall surface of the foam forming tube 7 that most works for foam formation, and the spray liquid colliding with the uneven surface portion 8 is strongly irregularly reflected by the uneven surface portion 8. The direction is changed, and this is frequently generated in the narrow foam-making cylinder 7, is scattered and disturbed, and the air is sufficiently sprinkled to stir and mix, so that the foaming is improved, and fine foam-making is highly efficiently obtained. be able to. Then, the foam can be ejected smoothly without any obstacles and without defoaming on the way.

[Brief description of drawings]

1A and 1B are a longitudinal sectional view and a front view of an embodiment of a nozzle of a liquid ejector according to the present invention, and FIGS. 2 to 7 are longitudinal sectional views of another embodiment, respectively, and FIG. Is a vertical sectional view of still another embodiment, and FIG. 9 is a simplified view of a trigger type liquid ejector. 5a ... Nozzle body, 5b ... Liquid guide 6 ... Nozzle hole, 7 ... Foam forming cylinder 8 ... Rough surface

Claims (1)

[Scope of utility model registration request] 1. A nozzle of a liquid ejector in which a foam forming cylinder 7 is disposed in front of a nozzle hole 6 of a nozzle body 5a, a liquid having an uneven surface portion 8 formed in the middle or rear portion of the inner wall surface of the foam forming cylinder 7. Ejector nozzle.