JPH0615855Y2 - Trigger type liquid ejection container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a trigger-type liquid ejection container for both inversion and upright.

"Prior Art" As a container of this kind, a front end face formed on the ejector body behind the trigger by swingably hanging a trigger from the front part of the ejector body attached to the mouth of the liquid storage container body In the open cylinder, the rear part of the piston is fitted so as to be movable back and forth and in a forward biased state, the front end of the piston is engaged with the rear surface of the trigger, and the upper end is further in the cylinder.
Further, the lower end of the container body is provided with an outside air suction passage that opens at the bottom, and when the piston is moved backward by the trigger pulling, the pump chamber of the ejector body is pressurized to eject the liquid in the pump chamber and the outside air. There is one in which the upper end of the suction passage is opened so that outside air can be sucked into the container body.

"Problems to be solved by the invention" However, in the above-mentioned conventional liquid ejection container, when the piston is moved backward by pulling the trigger when using it upside down, the inside of the container passes through the outside air suction passage opened at that time. There was a drawback that the liquid leaked to the outside.

That is, the outside air suction passage is normally closed by the piston, but when the piston moves rearward due to the pulling of the trigger, some liquid leaks out against the outside air sucked through this opening.

In view of this, the present invention provides a trigger type liquid ejection container in which a check valve is provided in the gap between the outer surface of the piston and the inner surface of the cylinder so as to surely prevent liquid leakage during inverted use. To aim.

[Means for Solving the Problems] In order to achieve the above object, the container of the present invention can swing the trigger 17 from the front part of the ejector main body 2 attached to the mouth part of the liquid storage container body 1. And the rear part of the piston 19 is fitted in the cylinder 18 having an open front end face formed in the ejector main body behind the trigger in a forwardly biased state while allowing the rear part of the piston 19 to move forward and backward, and the piston front end on the rear face of the trigger. Engagement, further the upper end in the cylinder, and the lower end in the container body mouth, respectively, to provide an outside air suction passage 21 opening,
At the time of rearward movement of the piston due to the trigger pulling, while pressurizing the pump chamber of the ejector body to eject liquid in the pump chamber, the upper end of the outside air suction passage is opened so that outside air is sucked into the container body, and In a trigger type liquid ejection container having a liquid suction passage switching mechanism inside, a large outer diameter portion 19a that opens and closes the outside air suction passage by sliding the piston 19 onto the inner surface of the cylinder and protrudes forward from the large outer diameter portion. With the small outer diameter portion 19b
A check valve 22 is provided in a gap between the outer surface of the small outer diameter portion and the inner surface of the cylinder, and the check valve is a short tubular portion 22 fitted to the small outer diameter portion.
a) A rear large diameter elastic tapered portion 22b is projected from the outer surface to form a rear end outer peripheral portion of the elastic tapered portion in a watertight sliding contact with the inner surface of the cylinder located in front of the opening of the outside air suction passage. It is characterized by

"Operation" For example, referring to the attached drawings, the piston is
When 19 moves rearward and the upper end of the outside air suction passage 21 opens, the negative pressure in the container body 1 acts in the gap between the outer surface of the small outer diameter portion 19b of the piston 19 located behind the check valve 22 and the inner surface of the cylinder 18. As a result, the check valve opens, so that the outside air is sucked into the container body through the outside air suction passage and the negative pressure is prevented.

On the other hand, when it is used upside down, the outside air intake path
The upper end of 21 is closed by a piston, and is double-sealed by a check valve 22 at the front of the piston to reliably prevent liquid leakage. Further, when the piston retracts by pulling the trigger, only the seal of the piston is released and outside air can be sucked in, and even if the liquid inside the container is allowed to flow into the above-mentioned gap, the check valve causes the negative pressure inside the container to be reduced. The liquid does not leak to the outside because it does not open so that the outside air can be sucked in.

[Example] An example of the container of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is a container for liquid storage, and 2 is a trigger type ejector main body.

The container body 1 is made of synthetic resin in which the mouth / neck portion 5 is erected from the upper end of the body portion 3 via the shoulder portion 4.

The trigger type ejector main body 2 is provided with an inward flange 7 in which a base cylinder portion 6 is hung from the lower surface of the main body portion 2a, and the base cylinder portion 6 is screwed into the mouth neck portion and the mouth neck outer surface. It is mounted via the mounting cylinder 8. In the illustrated example, the upper half of the toped tubular body 10 having the outward flange 9 attached to the outer surface of the intermediate portion is fitted into the base tubular portion 6, and the outward flange 9 is attached to the mounting tubular 8
The inward flange 7 and the upper end of the container body neck 5 are sandwiched. A packing 11 is interposed between the lower surface of the outward flange 9 and the upper end surface of the mouth / neck portion 5.

A pipe fitting cylinder 13 as a part of a liquid suction passage with a suction valve 12 for sending the liquid into the pump chamber A of the main body portion 2a is hung inside the base cylinder portion 6. In the illustrated example, the pipe fitting cylinder 13 and the top-end cylinder 10 are integrally formed in a double cylinder shape. Further, a liquid suction passage switching mechanism is provided in the container body 1. The mechanism is composed of a connector 14 connected to the pipe fitting cylinder 13 and a suction pipe 15 connected via the connector 14. That is, the connector 14 branches the two branch pipes 14b, 14c from the lower end of the base pipe portion 14a to separately open the respective tip end portions of the branch pipes 14b, 14c in the vertical direction, and both branch pipes 14b, Check valves 16A and 16B are internally provided in the respective 14c, and the suction pipe 15 is connected to the branch pipe 14c of the lower opening of the both branch pipes 14b and 14c.

A trigger 17 is slidably hung from the front part of the main body 2a, and a cylinder 18 having an open front end face is formed in the main body 2a behind the trigger 17, and a rear part of a piston 19 is moved back and forth into the cylinder 18. The front end of the piston is engaged with the rear surface of the trigger 17 while being freely and forwardly biased. Reference numeral 20 in the drawing denotes a coil spring that biases the piston forward.

Further, an outside air suction passage 21 having an upper end inside the cylinder 18 and a lower end inside the container body opening is provided. In the illustrated example, the outside air intake passage 21 includes a first through hole 21a formed in the wall of the cylinder 18 of the main body 2a, a second through hole 21b formed in the top wall of the toped tubular body 10, and Both through holes 21a, 21b
A concave groove 21c formed on the upper surface of the top wall so as to communicate with each other.
It is formed from and.

Then, when the piston 19 is moved rearward by pulling the trigger 17, the inside of the pump chamber A is pressurized to eject the liquid in the pump chamber, and the upper end of the outside air suction passage 21 is opened to suck the outside air into the container body 1. It is designed to let you.

Although the configuration up to this point is the same as that of the conventional container, the feature of the present embodiment is that the piston 19 has a large outer diameter portion 19a that opens and closes the outside air suction passage 21 by sliding contact with the inner surface of the cylinder 18, and the large outer diameter. The check valve 22 is formed by a small outer diameter portion 19b protruding forward from the diameter portion 19a, and a check valve 22 that opens and closes in response to a front-back differential pressure is provided in a gap between the outer surface of the small outer diameter portion 19b and the inner surface of the cylinder 18. The check valve 22 is configured such that a rear large-diameter elastic tapered portion 22b is protruded from an outer surface of the short tubular portion 22a fitted to the small outer diameter portion 19b, and a rear end outer peripheral portion of the elastic tapered portion 22b is It is formed by making watertight sliding contact with the inner surface of the cylinder 18 located in front of the opening of the outside air suction passage 21. The short tubular portion 22a and the elastic tapered portion 22b are integrally formed by using an elastic material such as rubber.

Therefore, according to the present embodiment, when used upside down, the liquid inside the container is sucked up from the branch pipe 14b of the upper opening of the connector 14 to realize the pumping action, and the check valve 22 prevents liquid leakage.

[Advantage of Device] As described above, the container of the present invention, by having the above-described configuration, can satisfactorily eject the liquid in both the upright and inverted states, and is capable of providing the outside air suction mechanism without any major structural change. It is possible to surely prevent liquid leakage at the time of jetting in an inverted state without damaging it.

In addition, in the inverted state, since the liquid can be ejected by grasping the container neck and pulling the trigger, the liquid can be ejected accurately and easily to an appropriate position with one hand.

[Brief description of drawings]

 FIG. 1 is a partially cutaway side view showing an embodiment of the present invention. 1 …… Container body 2 …… Trigger type ejector body 22 …… Check valve

Claims (1)

[Scope of utility model registration request] 1. A trigger 17 is oscillated from a front portion of an ejector main body 2 attached to a mouth portion of a liquid storage container body 1 to open a front end face formed on the ejector main body behind the trigger. The rear part of the piston 19 is fitted into the cylinder 18 so as to be movable back and forth and biased forward, the front end of the piston is engaged with the rear surface of the trigger, the upper end is further inside the cylinder, and the container body mouth part is inside. The outside air suction passages 21 each having a lower end opened are provided, and when the piston is moved backward by the trigger pulling, the pump chamber of the ejector body is pressurized to eject the liquid in the pump chamber and the upper end of the outside air suction passage is opened. In a trigger type liquid ejection container in which the outside air is sucked into the container body and a liquid suction path switching mechanism is provided inside, the piston 19 is slidably brought into contact with the inner surface of the cylinder. A large outer diameter portion 19a for opening and closing the outside air suction passage and a small outer diameter portion 19b protruding forward from the large outer diameter portion 19a.
And a check valve 22 is provided in the gap between the outer surface of the small outer diameter portion and the inner surface of the cylinder, and the check valve is rearward from the outer surface of the short tubular portion 22a fitted to the small outer diameter portion. The large-diameter elastic taper portion 22b is projected so that the outer peripheral portion of the rear end of the elastic taper portion is
A trigger-type liquid ejection container, which is formed by sliding water-tightly on an inner surface of a cylinder located in front of the opening of the outside air suction passage.