JP4123645B2 - Trigger type liquid ejector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a trigger type liquid ejector.
[0002]
[Prior art]
For example, as disclosed in Japanese Patent Application Laid-Open No. 8-196958, a vertical cylinder is erected from the upper part of the mounting cylinder to be fitted to the outer surface of the container mouth, neck, and the injection cylinder protrudes forward from the upper end of the vertical cylinder. The trigger is suspended by being pivotally attached to the part, and further, the plunger is forward-biased and fitted into the cylinder projecting forward from the vertical cylinder, and the front end of the plunger is engaged with the upper rear surface of the trigger. By pulling, the liquid in the cylinder is ejected from the nozzle hole of the nozzle fitted to the front end of the injection cylinder, and when the trigger is released, the plunger moves forward, the inside of the cylinder becomes negative pressure, the trigger returns, and the negative pressure in the cylinder A trigger type liquid ejector provided so that the liquid in the container is sucked into the cylinder by the conversion is well known.
[0003]
Since the liquid ejector ejects liquid even if the trigger is pulled by mischief, in order to eliminate such drawbacks, as a safety device, the injection cylinder and the nozzle are connected to the first half and the second half of the liquid discharge path. When the nozzle is rotated, the first half and the second half of the liquid discharge path communicate with each other, and further, the communication between the first half and the second half is blocked by rotation or reverse rotation. Things have been done. However, even in the liquid ejector provided so as to open and close the liquid discharge path by rotating the nozzle as described above, when the trigger is frequently pulled while the liquid discharge path is closed, the trigger is bent or elastically restored. As a result, the plunger moves slightly backward and forward, and then passes through the discharge valve due to abnormally high pressure in the cylinder, and between the discharge valve and the liquid discharge path portion formed by the nozzle fitting cylinder and the like. High pressure liquid may accumulate in the front part of the injection cylinder. When this happens, when the nozzle head is rotated to the liquid discharge path communication position, the high pressure liquid stored in the front part of the injection cylinder is triggered. In spite of not carrying out, ejection from the nozzle hole occurred. Further, when the trigger is pulled strongly, the nozzle head may come off from the nozzle fitting cylinder due to the high pressure in the injection cylinder.
[0004]
In order to eliminate the above drawbacks, Japanese Patent Laid-Open No. 10-146550 discloses that a nozzle cover is integrally fitted to the outer surface of a nozzle that is rotatably fitted to the front end of the injection cylinder, and the lower surface of the cover The trigger cover is suspended along the front face of the trigger, and a protrusion for preventing the trigger cover from being pulled backward is attached to the front face of the cover. By doing so, the trigger must be It is provided so as to be removed from the trigger front surface by pushing the cover upward on the nozzle cover side.
[0005]
In Japanese Patent Laid-Open No. 10-128187, the stopper is suspended from the rear of the trigger, and the stopper is swung to engage the lower end of the cylinder with the lower front end of the cylinder. During operation, the stopper is removed from the cylinder so that it can be suspended.
[0006]
[Problems to be solved by the invention]
In the case of the above-mentioned JP-A-10-146550, it is impossible to prevent the trigger and the trigger cover from being pulled back together by using a tool such as a plate by mischief, etc. A problem arises when the safety device is forgotten to be used.
[0007]
In the present invention, the trigger cover is projected from the nozzle cover, and an engagement plate with a spacer is projected from the side surface of the nozzle cover, and the spacer enters between the trigger rear surface and the lower portion of the cylinder front end surface to perform the trigger operation. This is to solve the above-mentioned problem.
[0008]
[Means for Solving the Problems]
Plunger in which a vertical cylinder is erected from the inside of the mounting cylinder to be fitted to the container body neck and neck, the injection cylinder is projected from the upper end of the vertical cylinder, and the cylinder 3 is projected from the middle part, and is fitted into the cylinder. 4 The front end is connected to the upper rear surface of the trigger suspended from the front of the injection cylinder so as to be swingable in the front-rear direction, and the nozzle cover 7 is attached to the outer surface of the nozzle that is rotatably fitted to the front end of the injection cylinder. The trigger cover 8 is suspended from the lower surface of the cover 5 along the front surface of the trigger 5 and attached to the front surface of the cover. Then, the engagement plate 10 is projected rearward in contact with the upper side surface of the trigger 5, and a spacer 11 is provided on the inner surface of the rear end portion of the engagement plate. The front surface of the spacer is on the rear surface of the upper portion of the trigger 5, and the rear surface is a cylinder. To the bottom of the front end face of 3 Each of the injection cylinders was detachably engaged by rotating the nozzle cover 7 together with the nozzle.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
First, a conventional well-known part will be briefly described. 1 is a container body, 2 is a mounting cylinder screwed into the container mouth neck, a vertical cylinder is raised from the mounting cylinder, and an injection cylinder is A trigger in which the front end portion of the plunger 4 that protrudes forward from the intermediate portion and is fitted forwardly into the cylinder is vertically suspended from the front portion of the injection cylinder so as to be swingable in the front-rear direction. 5 is connected to the upper rear surface. In the illustrated example, the main body cover 6 covers the vertical cylinder, the injection cylinder, most of the cylinders, and the upper part of the trigger 5.
[0010]
A nozzle is fitted to the front end of the injection cylinder so as to be rotatable and cannot be removed, and a nozzle cover 7 is integrally fitted to the outer surface of the nozzle so as not to be rotatable. From the lower surface, the trigger cover 8 is suspended along the front surface of the trigger 5, and the rib cover projection 9 for preventing the trigger cover from being pulled backward is provided from the front surface of the trigger cover.
[0011]
In the above known configuration, when the trigger cover 8 is rotated upward and outward, the nozzle cover 7 is rotated with respect to the front portion of the injection cylinder together with the nozzle, and at this time, the liquid discharge path and the nozzle hole communicate with each other. Therefore, when the trigger is swung in this state, the liquid in the container is sucked into the cylinder, and the liquid in the cylinder is ejected from the nozzle hole through the injection cylinder.
[0012]
In the above configuration, in the present invention, the engagement plate 10 protrudes rearward in an L shape in contact with the upper side surface of the trigger 5 from the left and right side surfaces of the nozzle cover 7, and the rear end portion inner surface of the engagement plate A spacer 11 was attached to the. The spacer is provided so that its front surface is in contact with the rear surface of the trigger 5 as shown in FIG. 3 and its rear surface is in contact with the lower portion of the front end surface of the cylinder 3 as shown in FIGS.
[0013]
In this state, since the spacer 11 is interposed between the trigger 5 and the front end surface of the cylinder 3, the trigger 5 cannot swing backward, and thus liquid ejection by the trigger operation is impossible.
[0014]
Since both the engagement plate 10 with the spacer and the trigger cover 8 protrude from the nozzle cover 7, the spacer 11 is separated from the trigger 5 by rotating the trigger cover 8 in a direction away from the side of the trigger 5. The cylinder 3 moves away from the lower part of the front end surface of the cylinder 3 and moves upward and outward. Therefore, the liquid can be ejected by the trigger operation only in this state, and the spacer 11 is also moved by returning the trigger cover 8 to the front surface of the trigger. It returns to the space between the trigger and the cylinder, and the trigger operation becomes impossible again.
[0015]
【The invention's effect】
The present invention is configured as described above, in which a trigger cover 8 projecting from the nozzle cover 7 is suspended along the front face of the trigger, and a protrusion 9 for preventing the trigger cover from being attached is provided on the front face thereof. Since the rear surface of the spacer 11 attached to the inner surface of the rear end of the engagement plate 10 protruding from one side surface of the nozzle cover 7 is brought into contact with the lower portion of the front end surface of the cylinder and the front surface is brought into contact with the rear surface of the trigger, The protrusion 9 and the spacer 11 doubly prevent the shifting operation to perform a safety device, and therefore the trigger operation in a state where the trigger cover hangs down along the trigger front surface can be reliably prevented. Further, the removal of the safety device performed by the trigger cover 8 or the like may be performed by rotating the trigger cover 8 to the outer side of the nozzle cover, and the operation is extremely easy. Furthermore, in the state where the safety device is removed, the engagement plate 10 with the trigger cover and the spacer protrudes outward from the nozzle cover side, which makes the appearance uncomfortable, so that forgetting to implement the safety device can be prevented. .
[Brief description of the drawings]
FIG. 1 is a side view of a trigger type liquid ejector according to the present invention.
2 is a perspective view of the liquid ejector. FIG.
FIG. 3 is a bottom view of the main part of the liquid ejector.
[Explanation of symbols]
3 ... Cylinder 5 ... Trigger 7 ... Nozzle cover 8 ... Trigger cover
10 ... engagement plate 11 ... spacer

Claims (1)

Plunger in which a vertical cylinder is erected from the inside of the mounting cylinder to be fitted to the container body neck and neck, the injection cylinder is projected from the upper end of the vertical cylinder, and the cylinder 3 is projected from the middle part, and is fitted into the cylinder. 4 The front end is connected to the upper rear surface of the trigger suspended from the front of the injection cylinder so as to be swingable in the front-rear direction, and the nozzle cover 7 is attached to the outer surface of the nozzle that is rotatably fitted to the front end of the injection cylinder. The trigger cover 8 is suspended from the lower surface of the cover 5 along the front surface of the trigger 5 and attached to the front surface of the cover. Then, the engagement plate 10 is projected rearward in contact with the upper side surface of the trigger 5, and a spacer 11 is provided on the inner surface of the rear end portion of the engagement plate. The front surface of the spacer is on the rear surface of the upper portion of the trigger 5, and the rear surface is a cylinder. To the bottom of the front end face of 3 A trigger type liquid ejector which is detachably engaged with the ejection cylinder by rotating the nozzle cover 7 together with the nozzle.

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