JPH10180159A - Trigger-type liquid ejector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trigger locking mechanism in a trigger-type liquid ejector which ejects a liquid packed in a container by the pulling action of a trigger. SOLUTION: A pair of right/left slits 16 are drilled in the top wall 6a part of a cover over the rear of a lever 7a which juts out of both right/left parts of the upper end of a trigger 7, and a removable plate 20 is added to the rear part of a sliding plate 18, in an easily breakable manner, through a connecting part 19. In addition, a first and a second fitting plate 21, 22 are suspended from both right/left sides of each of the sliding plate 18 and the removable plate 20, then the fitting plates 21, 22 are fitted into the slits 16, and an extraction-proof protruding strip 23 to be fitted into the lower edges of the slits 16, is installed crosswise on the first fitting plate 21. Further, the lower end face of the front part of the first fitting plate 21 is fitted into the upper face of the rear end part of the lever 7a, then the removable part 20 is removed by breaking the connecting part 19, and the lever 7a is disengaged from the first fitting plate 21 by sliding the sliding plate 18 to a position behind the lever 7a.

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 A liquid ejector 1 shown in FIG. 4 is known. The ejector raises the vertical cylinder 3 from the upper part of the mounting cylinder 2 for screwing the mouth and neck of the container body, and projects the injection cylinder 4 forward from the upper end of the vertical cylinder. Is pivotally attached to the inner surface of the front part of the cover 6 which covers the cylinder, and the trigger 7 is hung down.
The front end of the plunger 8 is engaged with the upper rear surface of the trigger 7,
By pulling the trigger, the liquid in the cylinder is ejected from the nozzle hole 10a of the nozzle tube 10 fitted to the front end of the injection tube 4 via the nozzle mounting tube 9, and the release of the trigger causes the plunger 8 to move forward to return the trigger 7. At this time, it is provided that the liquid in the container is sucked into the cylinder 5.

In the above-described trigger type liquid ejector, since the liquid is ejected even if the trigger is pulled by mischief, the nozzle mounting cylinder 9 and the nozzle cylinder 10 are provided with the front half and the rear half of the liquid discharge path 11. , Nozzle cylinder 10 against nozzle mounting cylinder 9
When the is rotated, the communication of the liquid discharge path 11 is interrupted, and it is impossible to eject the liquid unless the nozzle tube 10 is returned to the original position.

[0004]

As described above, even in a liquid ejector provided so as to open and close a liquid discharge path by rotating a nozzle cylinder with respect to a nozzle mounting cylinder, the liquid discharge path is often kept closed. When the trigger is pulled, the trigger bends and resiliently restores, so that the plunger retreats or moves forward a little, and then the discharge valve and the nozzle mounting cylinder pass through the discharge valve due to abnormally high pressure in the cylinder. The high-pressure liquid may be stored in the front part of the injection cylinder between the liquid discharge path part formed by the above and the like. In this case, when the nozzle cylinder is turned to the liquid discharge path communication position, the front part of the injection cylinder becomes The high-pressure liquid stored inside the nozzle sometimes spouted from the nozzle hole regardless of the trigger operation.
Also, if the trigger is strongly pulled, the nozzle cylinder may come off from the nozzle mounting cylinder due to the high pressure in the injection cylinder.

According to the present invention, a plunger does not retreat at all even if the trigger is bent by a pulling operation, by projecting a lever rearward from both right and left portions of the upper end of the trigger and engaging a stopper with the lever so as to be freely detachable. The above-mentioned disadvantages are eliminated.

[0006]

As a first means, a vertical cylinder 3 is erected from the inside of a mounting cylinder 2 for fitting the mouth, neck and neck of a container.
The injection cylinder 4 projects from the upper end of the vertical cylinder, and the cylinder 5 projects forward from the middle part.
And a cover 6 having an outer wall 6b suspended from a peripheral portion other than a front edge of the top wall 6a so as to cover the cylinder 5.
The upper right and left parts of the trigger 7 are pivotally attached to the inner front part of 6b,
Further, the front end of the plunger 8 fitted to the cylinder 5 by being urged forward is engaged with the upper rear surface of the trigger 7, and the operation of the trigger causes liquid in the container to be sucked into the cylinder 5 and the nozzle hole to be drawn. In a trigger type liquid ejector provided so as to be able to eject from 10a, levers 7a, 7a are protruded from the upper right and left portions of the trigger 7 obliquely backward and rearward, and a cover top wall portion on the rear of these levers is provided with: A pair of left and right long holes
16 is drilled long in the front-rear direction, and a removing plate 20 is attached to the rear of the sliding plate 18 via a connecting portion 19 so as to be breakable, and both left and right sides of the sliding plate 18 and the removing plate 20 are provided. A sliding member 17 hanging from the first and second engaging plates 21 and 22 from
The sliding plate 18 and the removing plate 20 are fitted with the
Are mounted on the top wall 6a of the cover, and the first engaging plates 21, 21 hanging from the left and right sides of the sliding plate 18 are provided with pull-out preventing ridges 23 for engaging with the lower edge of the long hole 16. And the first engagement plate
The lower end surfaces of the front portions 21 and 21 are engaged with the upper surfaces of the rear end portions of the levers 7a and 7a.
By removing 20 and sliding the sliding plate 18 rearward on the levers 7a, 7a, the engagement between the lever and the first engaging plates 21, 21 can be released.

As a second means, in addition to the first means, the sliding plate 18 is formed so as to extend forward, and a closing plate 24 having substantially the same front and rear width as the removing plate 20 is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 denotes a generally used type of trigger type liquid ejector, which will be described with reference to FIG. As is well known, the liquid ejector raises a vertical cylinder 3 from the upper part of the mounting cylinder 2 screwed to the outer surface of the mouth and neck of the container body, and sets the injection cylinder 4 from the upper end of the vertical cylinder and the cylinder from the middle part. 5 are respectively protruded forward, and a cover 6 is provided in which a vertical wall 3, an injection cylinder 4 and a cylinder 5 are covered so as to be able to cover the vertical wall 3, the injection cylinder 4 and the cylinder 5, and the outer wall 6b is hung from a peripheral portion except a front edge of the top wall 6a. The upper left and right portions of the trigger 7 are pivotally attached to the front surface of the inner surface, and the front end of the plunger 8 fitted by being urged forward into the cylinder 5 is engaged with the upper rear surface of the trigger 7. The liquid in the cylinder 5 by the pulling operation of the injection cylinder 4
The cylinder 5
The liquid in the container is provided so as to be able to be sucked into the cylinder by reducing the internal pressure.

A nozzle tube 10 is fitted to the front of the injection tube 4 via a nozzle mounting tube 9. The nozzle mounting tube 9 and the nozzle tube 10 are connected to the center of the front wall of the nozzle tube. A liquid discharge path 11 is formed to communicate the nozzle hole 10a formed in the portion with the injection cylinder 4. The liquid discharge passage has a valve stem protruding forward from the center of the substrate 9a of the nozzle mounting cylinder 9 as shown in the figure.
An outer surface of the fitting tube 13 is formed from the center of the front wall of the nozzle tube 12 to the outer surface of the valve rod 12 in a watertight manner from the center of the front wall of the nozzle tube 10. That is, the first discharge passage 11a is formed in the rear inner surface of the fitting tube 13 in the cylinder direction, and the second discharge passage 11b is formed in the front outer surface of the valve rod 12 in the generatrix direction. When the nozzle cylinder 10 is rotated with respect to the nozzle mounting cylinder 9 from the communication state indicated by, the first discharge path 11a moves to another position of the valve rod 12 and the communication with the second discharge path 11b is cut off. By returning the nozzle tube 10 to its original position, the nozzle tube 10 communicates again as shown in FIG.

The above-described configuration is known, and the present invention will be described below. In the present invention, vertical plate-like levers 7a, 7a project from both right and left upper ends of the trigger 7 obliquely rearward. On the cover top wall 6a above the rear lever,
A pair of left and right long holes 16 are formed long in the front-rear direction.

A sliding member 17 is mounted on the top wall 6a of the cover 6. The sliding member has a removing plate 20 attached to the rear portion of the sliding plate 18 via a breakable connecting portion 19, and the first engaging plates 21, 21 are removed from both left and right sides of the sliding plate 18 and removed. Board
The second engagement plates 22, 22 are respectively hung down from both left and right sides of 20, and the pull-out preventing ridges 23 are laid horizontally on the upper outer surfaces of the first engagement plates 19, 19, and the sliding plate 18 is moved forward. Forming an extension, a closing plate 24 having substantially the same front and rear width as the removing plate 20 is provided, and the first and second engaging plates 21 and 22 are fitted into the long holes 16 so that the sliding plates 18 and The removal plate 20 and the closing plate 24 are placed on the top wall 6a of the cover 6, and the lower edge of the long hole 16 is provided with the upper surface of the pull-out preventing ridge 23, and the levers 7a, 7a are provided on the upper surface of the rear end. 1 Engage the front lower end surfaces of the engagement plates 21 and 21 respectively,
This prevents the plunger 8 from retreating due to the pulling of the trigger, and furthermore, the connecting portion 19 is broken to remove the removing portion 20, and the sliding plate 18 is slid to the rear of the levers 7a, 7a. The lever is formed so as to be disengaged from the first engagement plate 21. Further, the removal plate 20 is formed so that the width in the left-right direction is slightly wider than the cover top wall 6a so that fingertips can easily be applied to both left and right ends of the removal portion 20 when the connecting portion 19 is broken.

[0012]

According to the present invention, the first and second engaging plates 21 and 22 which hang down from both left and right sides of the sliding plate 18 and the removing plate 20 are provided. Is fitted into an elongated hole 16 formed in the top wall 6a of the cover 6, and the front lower end surfaces of the first engagement plates 21, 21 are protruded from the upper right and left portions of the trigger 7 obliquely rearward. The plunger 8 is engaged with the upper surface of the rear end of the lever 7a, 7a, and the first engaging plate 21, 21 is provided with a projection preventing ridge 23 for engaging with the lower edge of the elongated hole 16, so that the plunger 8 is retracted by pulling the trigger. Therefore, the inconvenience described in the problem to be solved by the invention, such as liquid leakage from the nozzle hole, can be solved. Also, the connecting portion 19 connecting the sliding plate 18 and the removing plate 20 is broken to remove the removing portion 20.
And the sliding plate 18 is slid rearward of the levers 7a, 7a, so that the lever and the first engaging plates 21, 21 can be disengaged from each other. Remover 20
Is removed, and the sliding plate 18 is slid backward, so that the trigger 7 can be pulled without any trouble.

In the case of the second aspect of the present invention, the sliding plate 18 is formed so as to extend forward, so that the closing plate having substantially the same front and rear width as the removing plate 20 is provided.
Since the removing portion 20 is provided, when the removing portion 20 is removed and the sliding plate 18 is slid backward, the front portion of the long hole 16 is closed by the closing plate 24, so that dust or the like Is cover 6
It does not penetrate inside.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a liquid ejector according to the present invention, with a part cut away.

FIG. 2 is a perspective view of the same embodiment.

FIG. 3 is a perspective view of the same embodiment, showing a state where a lock device is released.

FIG. 4 is a longitudinal sectional view of a conventional ejector.

[Description of Signs] 6 ... Cover 7 ... Trigger 17 ... Sliding member

Claims (2)

[Claims] 1. A vertical cylinder 3 is erected from the inside of a mounting cylinder 2 for fitting the mouth and neck of a container body, and an injection cylinder 4 is projected forward from an upper end of the vertical cylinder and a cylinder 5 is projected forward from an intermediate portion thereof. A cover 6 having an outer wall 6b suspended from a peripheral portion other than a front edge of a top wall 6a so as to cover the vertical cylinder 3, the injection cylinder 4, and the cylinder 5.
And the upper and right sides of the upper end of the trigger 7 are pivotally attached to the front inner surface of the outer wall 6b, and the front end of the plunger 8 fitted to the cylinder 5 by being urged forward into the cylinder 5 is positioned above the trigger 7. A trigger type liquid ejector provided so as to be engaged with the rear surface and to be able to suck up the liquid in the container into the cylinder 5 by the operation of the trigger and to eject the liquid from the nozzle hole 10a. Hever 7
a, 7a are protruded, and a pair of left and right long holes 16 are drilled long in the front-rear direction on the cover top wall on the rear of these levers. Removal plate possible via connection 19
20 and a sliding member 17 hanging down the first and second engaging plates 21 and 22 from both left and right sides of the sliding plate 18 and the removing plate 20, respectively.
The engaging plates 21 and 22 are fitted into the long holes 16 so that the sliding plate 18 and the removing plate 20 are placed on the cover top wall 6a. The first engaging plates 21 and 21 are elongated holes.
16 A pull-out preventing ridge 23 engaging with the lower edge is laterally provided, and the front lower end surfaces of the first engagement plates 21, 21 are engaged with the rear end upper surfaces of the levers 7a, 7a. By removing the removing portion 20 by breaking the connecting portion 19, and sliding the sliding plate 18 to the rear of the levers 7a, 7a,
A trigger type liquid ejector characterized in that the lever and the first engagement plates 21, 21 can be disengaged. 2. A removing plate formed by extending a sliding plate 18 forward.
The trigger type liquid ejector according to claim 1, further comprising a closing plate (24) having substantially the same front and rear width as (20).