JP2000070787A - Triggered liquid jetting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of a triggered liq. jetting device by providing a rod-shaped single member engaged into an injection cylinder with the suction valve, delivery valve and nozzle attaching member which have been separately furnished heretofore. SOLUTION: A rod-shaped member 11 with its front rod 12 and rear rod 13 integrally connected with a compressive spring piece 14 is engaged into an injection cylinder 4, an engaging element 17 projected from the rear of the front rod 12 is fixed to the inner face of the injection cylinder, a suction valve element 18 at the rear end of the rear rod is pressed on a suction valve hole 15 bored in the rear wall of the injection cylinder to constitute a suction valve 19, the periphery of an elastic valve element 21 expanded forward and outward from the middle of the front rod is pressed on the wall face of a liq. passage to form a delivery valve 22, and a liq. discharge path opening and closing mechanism is provided with the outer face of the front of the front rod 12 and the inner cylinder of the nozzle 5 rotatably engaged with the outer face of the front.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trigger type liquid ejector.

[0002]

2. Description of the Related Art As shown in, for example, Japanese Patent Application Laid-Open No. H10-146548, a vertical cylinder is erected from a mounting cylinder fitted to the mouth and neck of a container body, and an injection cylinder projects forward from the upper part of the vertical cylinder. The trigger, which is swingably suspended from the front part, is connected to the tip of a plunger projecting outward by fitting a half part into a cylinder provided below the rear part of the injection cylinder, and swinging the trigger. The liquid in the container is sucked into the cylinder through a suction pipe hanging down from the vertical cylinder, and the liquid in the cylinder can be ejected from a nozzle fitted to the front end of the injection cylinder via a nozzle mounting member, and The nozzle is rotatable so that the liquid discharge path can be opened and closed according to the rotation position, and the liquid ejected from the nozzle hole is ejected while rotating at high speed.

[0003]

In the liquid ejector as described above, a suction valve is usually provided in the lower part of the vertical cylinder, and a discharge valve is provided in the upper part of the vertical cylinder above a communication hole with the cylinder provided in the middle part of the vertical cylinder. , Respectively, and a nozzle mounting member is provided at the front end of the injection cylinder, but it is troublesome to provide such individually.
Also, as the distance from the discharge valve to the nozzle hole at the front end of the injection cylinder increases, the resistance at the time of liquid outflow increases, so that the liquid ejection pressure decreases, and further, as the liquid flow path from the discharge valve to the nozzle hole increases, After the liquid is ejected, the amount of liquid remaining in the liquid flow path portion from the discharge valve to the nozzle hole increases, and the remaining liquid easily leaks. According to the present invention, a rod-shaped member having a suction valve body, a discharge valve body, and a nozzle mounting portion is fitted into an injection cylinder, thereby eliminating the above-mentioned conventional disadvantages.

[0004]

As a first means, a vertical cylinder is erected from a mounting cylinder fitted to the mouth and neck of a container body, and an injection cylinder projects forward from an upper part of the vertical cylinder, and from an upper part of the injection cylinder. A trigger that is swingably hung and a tip of a plunger projecting outward by fitting a half part into a cylinder provided below the rear part of the injection cylinder are connected, and the container is operated by swinging the trigger. In a trigger type liquid ejector, the internal liquid is sucked into the cylinder via a suction pipe hanging down from the vertical cylinder, and the liquid in the cylinder can be ejected from a nozzle fitted to the front end of the injection cylinder. Front rod part into injection cylinder 4
The rod-shaped member 11 formed integrally by connecting the rear bar portion 13 and the rear bar portion 13 with a compression spring piece 14, and the front bar portion 12 presses the tip of an engaging element 17 projecting radially from the rear outer surface to the inner wall surface of the injection cylinder. Let me fix it,
And, the rear rod portion 13 presses the suction valve element 18 attached to the rear end to the suction valve hole 15 formed in the rear wall of the injection cylinder to form and fit the suction valve 19, and further fits the front rod portion 12. By fitting the inner cylinder 5b projecting rearward from the nozzle front wall 5a to the front outer surface,
A liquid passage 16 communicating between the suction valve hole 15 and the nozzle hole 5c formed at the center of the nozzle front wall 5a is formed between the outer surface of the rod-shaped member and the injection cylinder 4 and the nozzle inner cylinder 5b. A skirt-shaped elastic valve body that protrudes forward and outward from the middle part of the part 12
The outer periphery of 21 is pressed against the wall of the liquid passage to form a discharge valve 22, and the liquid passage between the suction valve 19 and the discharge valve 22 is communicated with the inside of the cylinder to form a liquid inlet / outlet passage 26 for the cylinder.
And

[0005] As a second means, there is provided the first means, and the front half and the rear half of the liquid passage portion between the front outer peripheral surface of the front rod portion 12 and the inner surface of the nozzle inner cylinder are connected to the front rod. A first groove portion 23 formed on the outer surface of the portion 12 and a second groove portion 24 formed on the inner surface of the inner cylinder.
The liquid passage portion is formed so as to be freely communicated and blocked by the rotation of the inner cylinder 5b with respect to the front rod portion 12.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a conventional well-known structure will be briefly described. Reference numeral 1 denotes a mounting cylinder fitted to the mouth and neck of a container, and a vertical cylinder 2 stands upright from the mounting cylinder. , And an injection cylinder 4 projects forward from the upper end of the vertical cylinder, and a nozzle 5 is fitted to the front end of the injection cylinder. A trigger 6 is suspended from the front of the injection cylinder so as to be able to swing back and forth. A front end of a plunger 7 having a rear part fitted into the cylinder is connected to the upper part of the trigger. At 8, it is biased forward.
Reference numeral 9 denotes a suction pipe vertically provided from the lower part of the vertical cylinder 2.
In the present invention, a rod-shaped member 11 made of synthetic resin is fitted into the injection cylinder 4.

The rod-like member integrally connects the front rod portion 12 and the rear rod portion 13 with a compression spring piece 14, and the front wall of the nozzle 5 formed in a cap shape is formed on the front outer surface of the front rod portion 12. An inner cylinder 5b projecting rearward from 5a is fitted, and the outer surface of the rod-shaped member is
And a liquid that communicates with the inner peripheral surface of the inner cylinder 5b, between the suction valve hole 15 formed in the vertical cylinder portion forming the rear wall of the injection cylinder and the nozzle hole 5c formed in the center of the nozzle front wall. A passage 16 is formed. Also, several engaging elements 17 protrude radially from the rear outer surface of the front rod portion 12, and their front ends are pressed against the inner surface of the injection cylinder hole to fix the front rod portion into the injection cylinder. The suction valve element 18 attached to the rear end of the rear rod 13
Is pressed against the front surface of the suction valve hole 15 by the urging of the compression spring piece 14 to form the suction valve 19. The rear rod portion is formed in a cross-shaped cross section or the like, and the liquid passage forming groove 20 is provided longitudinally. The rear rod portion moves forward against the bias of the compression spring piece, and can be retracted by the bias.

The front rod portion 12 is expanded outward from the middle portion to the front and outward to project a skirt-shaped elastic valve body 21. The outer periphery of the valve body is pressed against the outer wall surface of the liquid passage to form a discharge valve 22. are doing. In the illustrated example, a thin-walled cylindrical portion extends from the rear end of the outer peripheral portion of the nozzle inner cylinder 5b.
5d is pressed against the inner wall surface of the front part of the injection cylinder to protrude, and the outer periphery of the elastic valve body is pressed against the inner surface of the thin-walled cylinder part. Thus, the discharge valve may be formed.

The liquid passage portion between the front outer peripheral surface of the front rod portion 12 and the inner surface of the nozzle inner cylinder 5b may be formed only by the groove formed on one of the outer peripheral surface or the inner peripheral surface. However, in the illustrated example, the front half portion and the rear half portion are formed in one of the first groove portion 23 formed on the outer surface of the front rod portion 12 and the second groove portion 24 formed on the inner surface of the inner cylinder 5b. By rotating the nozzle 5, the two grooves can be communicated or blocked as shown in the figure. The liquid passage between the front end face of the front rod and the rear face of the nozzle front wall 5a is formed by forming a well-known spin groove 25 in either the front end face of the front rod or the rear face of the front wall. These are formed in the same manner as the liquid passage portion formed by the nozzle mounting member and the nozzle in the conventional example described above. In addition, the spin groove is provided only when used as a sprayer, and when ejecting liquid like a water gun,
Normal grooves.

A portion of the liquid passage 16 in the injection cylinder from the suction valve 19 to the discharge valve 22 communicates with the inside of the cylinder 3 through a liquid inlet / outlet passage 26. In the illustrated example, the liquid inflow / outflow path is formed between the rear end of the injection cylinder and the rear end of the cylinder. The liquid ejector having the above configuration is attached to the container body, and the trigger 6 is applied several times.
When the trigger is pulled from a state in which the liquid is sucked into the cylinder by swinging the liquid, the plunger 7 is retracted and the liquid in the cylinder is pressurized. The fluid enters the passage 16, passes through the discharge valve 22, passes through the first groove 23, the second groove 24, and the spin groove 25, and is spouted from the nozzle hole 5c while rotating at high speed. When the trigger is released, the trigger and the plunger 7 advance due to the urging of the leaf spring 8, and the pressure in the cylinder 3 and the liquid passage 16 is reduced to a negative pressure.
And the liquid is drawn into the cylinder through the liquid inlet / outlet passage 26. Thereafter, the liquid in the cylinder can be ejected from the nozzle hole and the liquid can be sucked into the cylinder by repeating the trigger operation.

[0011]

According to the present invention, since the rod member 11 having the above-described structure is fitted into the injection cylinder 4 to form the suction valve 19 and the discharge valve 22, the rod member 11 is moved into the vertical cylinder 2 as in the prior art. The two valves are separately formed without trouble, and the discharge valve 22 is formed by pressing the outer periphery of the elastic valve element 21 attached to the intermediate portion of the front rod portion 12 against the outer wall surface of the liquid passage. The distance of the nozzle fitted to the front end of the injection cylinder to the nozzle hole 5c can be shortened, so that a decrease in the liquid pressure ejected from the nozzle hole can be reduced, and therefore, after the liquid is ejected, the discharge valve can be moved from the discharge valve to the nozzle hole. The amount of liquid remaining during the period can be reduced. Further, the first half and the second half of the liquid passage portion between the front outer peripheral surface of the front rod portion 12 and the inner surface of the nozzle inner cylinder 5b are formed by a first groove portion 23 formed in the outer surface of the front rod portion and the inner surface of the inner cylinder 5b. Similarly, by forming one of the second groove portion 24 and the other with the second groove portion 24, and by rotating the nozzle inner cylinder with respect to the front rod portion 12, the two groove portions can be freely communicated and blocked. In order to achieve the above function, the nozzle mounting member conventionally used can be eliminated.

[Brief description of the drawings]

FIG. 1 is a sectional view of a liquid ejector according to the present invention.

[Explanation of symbols]

 11 ... Bar-shaped member 12 ... Front bar 13 ... Rear bar 14 ... Compression spring piece 19 ... Suction valve 22 ... Discharge valve 23 ... First groove 24 ... Second groove

Claims (2)

[Claims] 1. A vertical cylinder is erected from a mounting cylinder fitted to the mouth and neck of a container body, and an injection cylinder projects forward from an upper part of the vertical cylinder.
The trigger, which is swingably hung from the front of the injection cylinder, is connected to the tip of a plunger projecting outward by fitting a half part into a cylinder provided below the rear of the injection cylinder. Trigger type in which the liquid in the container is sucked into the cylinder through a suction pipe which is suspended from the vertical cylinder by the swinging operation of the cylinder, and the liquid in the cylinder can be ejected from a nozzle fitted to the front end of the injection cylinder. In the liquid ejector, the front rod portion 12 and the rear rod portion 13 are compressed into the injection cylinder 4 by a compression spring piece.
The rod-shaped member 11 integrally formed at 14, the front rod 12, the tip of the engaging element 17 radially projecting from the rear outer surface is fixed to the inner wall of the injection cylinder by pressing the tip of the engaging element 17, and the rear rod 13 is The suction valve body 18 attached to the rear end is pressed against the suction valve hole 15 formed in the rear wall of the injection cylinder to form and fit the suction valve 19, and further to the front outer surface of the front rod portion 12, the front of the nozzle. By fitting the inner cylinder 5b projecting rearward from the wall 5a, the outer surface of the rod-shaped member and the injection cylinder 4
A liquid passage 16 communicating between the suction valve hole 15 and the nozzle hole 5c formed in the center of the nozzle front wall 5a is formed between the suction valve hole 15 and the nozzle inner cylinder 5b. The outer periphery of the skirt-shaped elastic valve body 21 protruding from the cylinder is pressed against the wall of the liquid passage to form a discharge valve 22, and the liquid passage between the suction valve 19 and the discharge valve 22 communicates with the inside of the cylinder. Let the liquid in and out of the cylinder
A trigger type liquid ejector characterized by having 26. 2. A front rod portion and a rear half portion of a liquid passage portion between a front outer peripheral surface of a front rod portion 12 and an inner surface of a nozzle inner cylinder.
12 A first groove 23 formed on the outer surface and a second groove 23 formed on the inner surface of the inner cylinder.
The liquid passage portion is formed by either one or the other of the groove portions 24, and the liquid passage portion is formed so as to be freely communicated and blocked by the rotation of the inner cylinder 5b with respect to the front rod portion 12. The trigger type liquid ejector according to the above description.