JPH1128398A - Liquid sprayer with trigger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a cylinder, a piston, a suction valve and a discharge valve by providing a bellows cylinder freely compressed by a trigger to a vessel body and directly making the inside of the vessel body to have high pressure by the bellows cylinder. SOLUTION: In the liquid ejector, a bellows cylinder 7 freely expanded and contracted by operation of a trigger D is provided in the mouth/neck part 5 of a vessel body, and the top end of a suction pipe E is directly communicated with an injection cylinder 11. Then, liquid is spouted by making the inside of the vessel body A to have high pressure by compression of the bellow cylinder 7. The inside of the vessel body A is made to have negative pressure by expansion of the bellow cylinder 7 and outside air is introduced into the vessel body A through an outside air-introducing hole 13 and an elastic valve cylinder B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a trigger type liquid ejector.

[0002]

2. Description of the Related Art As shown in, for example, Japanese Utility Model Laid-Open Publication No. Sho 62-170168, a main body part having a base cylinder part having a lower end attached to a mouth and neck of a container body is suspended from a rear end part of the injection cylinder part. Into the cylinder hole drilled in the main body by opening it to the front of the base cylinder,
A plunger having a rear portion fitted in a forward biased state, and a trigger having an upper end pivotally attached to a front portion of the injection cylinder portion and having a rear surface engaged with the plunger front end, the trigger being hung down; 2. Description of the Related Art A trigger-type liquid ejector is known, which is provided so that the liquid in a container is sucked into a cylinder through a suction valve by operation and is ejected from a nozzle hole at a front end of an injection cylinder through a discharge valve.

[0003]

As described above, this type of trigger type liquid ejector is designed to draw up only a required amount of liquid to pressurize the liquid to a higher pressure and pressurize the cylinder. It has a plunger, and has a suction valve for preventing liquid backflow into the container when the pressure in the cylinder is increased, and a discharge valve for preventing air from flowing into the cylinder when the pressure in the cylinder is reduced. .
As described above, this type of general trigger type liquid ejector can perform high-pressure injection of liquid, but requires a cylinder, a plunger, a suction valve, and a discharge valve.
The structure has to be complicated, and the cost reduction is limited.

[0004] The trigger type liquid ejector according to claim 1 is
By providing a bellows cylinder that can be compressed by a trigger in the container body and directly increasing the pressure in the container body with the bellows cylinder,
It is intended to omit the piston, the suction valve and the discharge valve.

[0005]

As a first means, the mouth and neck 5 is erected from the upper end of the peripheral wall 1 via the shoulder 4 and an opening 6 is formed in the front of the peripheral wall of the mouth and neck. A container body A having a bellows cylinder 7 having a front end face closed and a rear end face opening protruding forward from the opening;
The lower surface of the outward flange 9 protruding from the upper end of the cylinder wall is placed on the upper surface of the mouth-neck portion 5 and the lower small-diameter elastic valve cylinder B hanging down into the mouth-neck portion 5, and the elastic valve cylinder B is hermetically penetrated. The injection cylinder 11 protrudes forward from the upper end of the main cylinder 10 whose upper surface is closed, the nozzle fitting cylinder 11a protrudes from the front end of the injection cylinder, and the main cylinder is surrounded by the upper outer surface of the main cylinder 10. Mounting tube 1
2 is provided vertically, and an upwardly-facing step 1 formed on the mounting cylinder tube wall portion.
2b, the outside air introduction hole 13 is formed in the upper cylindrical wall 12a, and the inner surface of the lower cylindrical wall 12c, which is lower than the upward stepped portion 12b, is fitted to the outer surface of the mouth and neck portion 5 in an airtight manner and cannot come out. Further, the injection cylinder member C having the outward flange 9 at the upper end of the elastic valve cylinder B sandwiched by the upward stepped portion 12b, and the push rod 16 from the rear surface of the trigger body 15 which swings down from the front of the injection cylinder 11 to the rear. It has a trigger D that protrudes and has the rear end of the push rod locked to the front surface of the bellows cylinder 7 and a suction pipe E that hangs down from the upper part of the main column cylinder 10.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. The trigger type liquid ejector according to the present invention includes a container, an elastic valve cylinder, an injection cylinder member, a trigger, and a suction pipe as main members. Hereinafter, these will be sequentially described.

Reference numeral A denotes a container body, which projects a bottom front wall 1a of a peripheral wall 1 rising from an outer peripheral portion of an oval bottom wall having a long axis extending in the front-rear direction forward from a front wall 1b above it, and a peripheral wall. 1 From the upper end, the engaging peripheral wall 3 is erected via the upward stepped portion 2, and the mouth and neck 5 is erected from the rear upper end of the engaging peripheral wall via the shoulder 4.

An opening 6 is formed at the front of the peripheral wall of the mouth and neck, and an elastic bellows cylinder 7 having a rear end opening is projected from the opening, and the front surface of the bellows cylinder is closed by a front wall 8. Then, a locking concave portion that is recessed rearward is formed in the central portion of the front wall.

Reference numeral B denotes an elastic valve cylinder which has the lower surface of the outward flange 9 projecting from the upper end of the lower small-diameter cylinder wall mounted on the upper surface of the mouth-neck portion 5 and hangs down into the upper end portion of the mouth-neck portion 5. The elastic valve cylinder B cylinder wall is
When the inside of the container is negatively pressurized, it expands outward to form a gap with the outer surface of the main column 10 described later, and when the inside of the container is pressurized, tightly adheres to the outer surface of the main column 10. To make this possible, the elastic valve barrel B is selected from materials having elasticity such as elastomer and natural rubber.

Reference numeral C denotes an injection cylinder member, which projects the injection cylinder 11 forward from the upper end of the main column cylinder 10 whose upper surface is closed, through which the elastic valve cylinder B is hermetically sealed, and projects the nozzle fitting cylinder 11a from the outer surface of the front end of the injection cylinder. On the other hand, a mounting tube 12 surrounding the main column tube is vertically provided from the outer surface of the upper end of the main column tube 10.

In other words, the mounting cylinder hangs a tapered cylinder 12a having a large diameter at the bottom surrounding the main cylinder 10 from the outer surface of the upper end of the main cylinder 10 and an outward flange 1 from the lower end of the tapered cylinder.
The cylindrical wall 12c is hung down through the inner wall 2b, and an outside air introduction hole 13 is formed at the rear part of the tapered cylinder 12a. And the elastic valve cylinder B
Is pressed and clamped on the upper surface of the mouth and neck 5.

On the upper surface of the front end of the injection cylinder 11, a pin support is provided to support a pin for pivotally mounting a trigger D described later. Reference numeral 14 denotes a nozzle head fitted to the nozzle fitting cylinder 11a.

Reference numeral D denotes a trigger. The upper end of the trigger main body 15 is swingably pivotally connected to the pin support of the injection cylinder 11 via the pin 15a, and the push rod 16 is moved rearward from the vertical middle portion of the rear surface of the trigger main body 15. The push rod rear end is locked to a locking recess of the front wall 8 of the bellows cylinder 7.

E is a suction pipe which hangs down from the upper part of the main cylinder 10 and reaches the front of the bottom of the container A.

Reference numeral 17 denotes a cover, which is a cover base cylinder 17a which is fitted to the outer peripheral surface of the engaging peripheral wall portion 3 so as to be unable to come out by uneven engagement.
The side wall 17b is erected from the upper end excluding the front end of the trigger, the inner surface of the upper end of the side wall is engaged with the side of the injection cylinder 11, and the inner surface of the upper end of the side wall is also allowed to swing on the side of the upper end of the trigger D. The top surface of the injection cylinder 11 is covered with a top wall 17c that closes the top surface of the side wall 17b. That is, the cover 17 is formed so as to cover the left and right side surfaces of the mouth and neck 5, the bellows cylinder 7, and the injection cylinder 11, the rear of the mouth and neck 5, the injection cylinder member C, and the upper surface of the injection cylinder 11, respectively.

Next, the operation of the present embodiment will be described.
In order to eject the liquid, the trigger D may be pulled from the original position shown in the drawing to the front, and the push rod 16 moves backward to compress the bellows cylinder 7, so that the air above the liquid level in the container body A has a high pressure. And the liquid in the container is sucked up by the pipe E and the main cylinder 10
Then, the fuel is ejected from the nozzle head 14 through the injection cylinder 11. When the pressure in the container is increased, the wall of the elastic valve cylinder B is brought into close contact with the outer surface of the main column 10 by high-pressure air, so that the compressed air in the container does not leak to the outside.

After the ejection, when the trigger D is released, the bellows cylinder 7 is extended to swing the trigger D to its original position. On the other hand, when the pressure inside the container body A becomes negative due to the extension of the bellows cylinder 7, air outside the container body A expands the cylinder wall of the elastic valve cylinder B, and a gap is formed between the cylinder wall and the outer surface of the main column cylinder 10. The outside air flowing from the gap through the outside air introduction hole 13 is introduced into the container A. This outside air introduction is started by releasing the trigger D and continues until the trigger D returns to the original position.

[0018]

According to the first aspect of the present invention, there is provided a trigger type liquid ejector for ejecting a liquid by directly increasing the pressure in a container by a trigger of a bellows cylinder protruding from an opening in the mouth and neck of the container. Not only can the cylinder and piston be omitted, but also a suction valve for preventing backflow of liquid into the container body and a discharge valve for preventing air from flowing into the cylinder are required as in the conventional case. Cost can be reduced.

Further, as described above, the cylinder, the piston,
Since the suction valve and the discharge valve can be omitted, the configuration can be simplified and the cost can be further reduced in combination with the above.

[Brief description of the drawings]

FIG. 1 is a view of a trigger type liquid ejector according to the present invention.
It is a longitudinal cross-sectional view along an X-ray.

FIG. 2 is a plan view of FIG.

[Explanation of symbols]

 Reference Signs List 1 peripheral wall 4 shoulder 5 mouth and neck 6 opening 7 bellows cylinder 9 outward flange 10 main column cylinder 11 injection cylinder 11a nozzle fitting cylinder 12 mounting cylinder 12a upper cylinder wall part 12b upward step part 12c lower cylinder wall part 13 outside air Inlet hole 15 Trigger body 16 Push rod A Container body B Elastic valve cylinder C Injection cylinder member D Trigger E Suction pipe

Claims (1)

[Claims] A mouth and neck portion is erected from an upper end of a peripheral wall via a shoulder portion, and an opening is formed in a front portion of the peripheral wall of the mouth to close a front end face and open a rear end face from the opening. A container body A having a bellows cylinder 7 protruding forward, and a lower small-diameter elastic valve having an underside of an outward flange 9 protruding from the upper end of the cylinder wall placed on the upper surface of the mouth-neck portion 5 and hanging down into the mouth-neck portion 5. Cylinder B, a main column cylinder 10 having an upper surface closed and airtightly penetrating the elastic valve cylinder B
The injection cylinder 11 protrudes forward from the upper end, a nozzle fitting cylinder 11a protrudes from the front end of the injection cylinder, and a mounting cylinder 12 surrounding the main column cylinder is vertically suspended from an upper outer surface of the main column cylinder 10; An outside air introduction hole 13 is formed in the upper cylinder wall 12a above the upward step 12b formed in the mounting cylinder cylinder wall, and the inner surface of the lower cylinder wall 12c below the upward step 12b is moved to the outer surface of the mouth-neck portion 5. An injection cylinder member C which is fitted airtightly and incapable of falling out, and further has an upwardly-facing stepped portion 12b sandwiching an outwardly directed flange 9 at the upper end of the elastic valve cylinder B; A trigger D having a push rod 16 projecting rearward from the rear surface of the trigger body 15 and locking the rear end of the push rod to the front surface of the bellows cylinder 7, and a suction pipe E hanging down from the upper part of the main column cylinder 10. Trigger type characterized by having Body ejector.