JP2004105925A - Trigger type jetting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid the leak of contents from a negative pressure release hole to improve handleability. <P>SOLUTION: The trigger type jetting device has a body with a discharge route communicating with a jetting nozzle and a base cap for fixing the base part of the body to the opening of a container. The device jets the contents in the container from the jetting nozzle through the discharge route by sucking and pressing the contents by alternately repeating the traction of a lever and the release of the traction. At the base part of the body, a penetration hole for releasing the negative pressure in the container by taking outside air thereinto and a projection part arranged next to the penetration hole and projected toward the bottom of the container are formed. A cover is arranged which is fitted to and held by a minute holes formed at the projection part, is kept in contact with the backface of the base part, and covers the projection part except a part of the penetration holes. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a trigger type ejector often used for a container containing a fungicide, a detergent, a hairdressing agent, an aromatic and the like, and a liquid from a negative pressure release hole provided in the ejector. It seeks to advantageously avoid leaks.
[0002]
[Prior art]
The trigger type ejector that alternately pulls and releases the lever to eject the contents of the container is used when the lever is pulled for the purpose of eliminating the depressurized state in the container due to the discharge of the contents. There is provided a negative pressure release hole which is opened only and guides outside air into the container.
[0003]
By the way, when the negative pressure release hole is used in such a manner as to spray the contents in a state where the container is tilted or turned upside down, through the negative pressure release hole at the beginning of the discharge or when the lever is slowly pulled. There was a possibility that the contents would leak out.
[0004]
As a technique for solving such a conventional problem, a structure in which air is allowed to flow from a negative pressure release hole, but an inner plug member that prevents the contents in the container from passing is proposed. (For example, see Patent Document 1).
[0005]
[Patent Document 1]
JP-A-10-236502.
[0006]
However, in the case where the inner plug member is provided as described above, since a relatively large vacant space is formed between the back surface of the base of the ejector and the inner plug member, the contents accumulate in the vacant room. There is a possibility that the contents may leak through the negative pressure release hole when the container is used with the container tilted or turned upside down while the contents are accumulated in the empty room. It has not been resolved.
[0007]
[Problems to be solved by the invention]
An object of the present invention is to propose a novel trigger type ejector which can avoid liquid leakage from a negative pressure release hole.
[0008]
[Means for Solving the Problems]
The present invention comprises a body having a discharge passage leading to an injection nozzle, and a base cap for fixing and holding the base of the body to the mouth of the container, and alternately repeats towing and release of the lever to thereby remove the contents in the container. A trigger-type ejector that sucks, pressurizes, and ejects the content from the ejection nozzle through the discharge passage,
At the base of the body, a through hole for taking in outside air to release the negative pressure in the container, and a convex portion disposed adjacent to the through hole and protruding toward the bottom surface of the container, are provided. A trigger type ejector characterized in that a cover which is fitted and held, and which covers and covers a part of the through hole under contact with the rear surface of the base is arranged.
[0009]
In the ejector having the above configuration, it is particularly preferable that the projection has a planar shape such as a cross, a triangle, and a rectangle.
[0010]
Hereinafter, the present invention will be described more specifically with reference to the drawings.
[0011]
FIG. 1 is a sectional view showing an embodiment of a trigger type ejector according to the present invention. In the figure, reference numeral 1 denotes an injection nozzle, and 2 denotes a body of an ejector to which the injection nozzle 1 is mounted. The body 2 is provided with a discharge passage 2a connected to the injection nozzle 1.
[0012]
Reference numeral 3 denotes a base cap for fixing and holding the base 2b of the body 2 to the mouth of the container, 4 denotes a cylinder provided integrally with the body 2, 5 denotes a piston that can reciprocate in the cylinder 4, and 6 denotes a piston 5 A spring disposed between the cylinder and the cylinder 4 for restoring the piston 5 to its initial position, a lever 7 is swingably held by the body 2, and a suction tube 8 sucks the contents in the container.
[0013]
Reference numeral 9 denotes a through hole provided in the base 2b of the body 2 for taking in outside air and releasing the negative pressure in the container. Reference numeral 10 denotes a protrusion which is disposed adjacent to the through hole 9 in the base 2b and protrudes toward the bottom surface of the container. And 11 have a flange-like shape with one end formed with a minute opening t in the protruding portion 10 and fitted and held, and the other end in the form of a flange extending outward, and the other end of the flange is in contact with the back surface of the base 2b. The cover covers and covers a part of the through hole 9.
[0014]
As shown in FIGS. 2 (a) and 2 (b), only the body 2 is taken out and shown, for example, the cross-section of the convex portion 10 can be formed into a cross shape, and a cover 11 having a circular opening is fitted therein. By doing so, a minute opening t can be formed between them, and when the lever 7 is pulled, outside air can be introduced into the container from the through hole 9 through the minute opening t.
[0015]
The intrusion of the contents can be suppressed by providing a small opening t or a part of the through hole 9 not covered by the cover 11 with an opening area allowing only the invasion of air. The space formed between the hole 9 and the hole 9 has a small volume, so that the contents do not accumulate there, and even when the container is used with the container tilted or turned upside down, at the beginning of the ejection or slowly pulling the lever. Even when towing, there is almost no possibility that the contents leak out as compared with the conventional type of ejector.
[0016]
The other end of the cover 11 is in contact with the base 2b of the body 2 so as to cover and cover a part of the through hole 9, and a high sealing property is required at the contact portion. For this reason, it is preferable to apply an elastic body such as rubber so that a force for pressing the other end against the base 2b is applied to the cover 11 while being fitted and held on the projection 10.
[0017]
Although the cover 11 shown in FIG. 1 has a circular opening, and the convex portion 10 has a cross-shaped planar shape as an example, it has a shape as shown in FIGS. The opening shape of the opening t and the planar shape of the convex portion 10 are not particularly limited.
[0018]
【The invention's effect】
According to the present invention, since the outside air is introduced into the container through the through hole and the minute opening, the contents do not easily leak to the outside through the through hole depending on the use posture of the container, so that the usability is significantly improved. You.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of an ejector according to the present invention.
FIGS. 2 (a) and 2 (b) are views showing only an injection cylinder taken out, (a) is a side view, and (b) is a bottom view.
FIG. 3 is a diagram showing a combination example of a convex portion and a cover.
FIG. 4 is a diagram showing an example of a combination of a convex portion and a cover.
FIG. 5 is a diagram showing a combination example of a convex portion and a cover.
[Explanation of symbols]
Reference Signs List 1 injection nozzle 2 body 2a discharge path 2b base 3 base cap 4 cylinder 5 piston 6 spring 7 lever 8 suction tube 9 through hole 10 convex portion 11 cover t minute opening

Claims (2)

It has a body with a discharge passage leading to the injection nozzle, and a base cap for fixing and holding the base of the body to the mouth of the container. The tow and release of the lever are alternately repeated to suck and add the contents in the container. A trigger type ejector that presses and ejects contents from an injection nozzle through the discharge passage,
At the base of the body, a through hole for taking in outside air to release the negative pressure in the container, and a convex portion disposed adjacent to the through hole and protruding toward the bottom surface of the container, are provided. A trigger type ejector, wherein a cover is formed and fitted and held to cover and leave a part of the through hole under contact with the back surface of the base. The trigger type ejector according to claim 1, wherein the convex portion has a cross-sectional shape, a triangular shape, or a rectangular planar shape.

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