JP3904918B2 - 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]
As shown in Japanese Patent Laid-Open No. 2001-10655, a nozzle cap is rotatably fitted to a fitting cylinder outer surface protruding forward from the front end face of the injection cylinder, and is interposed between the injection cylinder and the nozzle cap. A stopper member fitted to the outer surface of the fitting cylinder so as to be movable up and down is formed so that it can be raised by rotating the nozzle cap in the forward direction and can be lowered by turning in the reverse direction. The lower part of the stopper member is engaged in the lowered position and detached in the raised position with respect to the trigger that is swingable and biased forward, and is detached in the raised position. There is known a trigger type liquid ejector capable of pulling back the trigger only at the top.
[0003]
[Problems to be solved by the invention]
The trigger type liquid ejector protrudes from the lower part of the rear surface of the trigger to engage the stopper member rather than the engaging plate for pushing the plunger backward from the rear surface of the trigger to prevent the trigger from swinging backward. Therefore, the stopper member is loosely fitted to the front part of the injection cylinder and hangs down, so that the stopper member becomes large and requires extra materials. Therefore, the nozzle cap for moving the stopper member up and down is also required. A lot of force was also required for rotation.
[0004]
The present invention is provided to eliminate such drawbacks.
[0005]
[Means for Solving the Problems]
From y de tube 3 front face forward protruding from causes the fitting cylinder 4 the outer surface, the nozzle cap 5 causes rotatably fitted, is interposed into between the injection tube 3 and the nozzle cap 5 fitting cylinder 4 A stopper member 10 fitted to the outer surface so as to be movable up and down is formed so that it can be raised by rotating the nozzle cap 5 in the forward direction and lowered by turning in the reverse direction, and from the front of the injection cylinder to the rear. The lower part of the stopper member 10 is engaged in the lowered position and disengaged in the raised position with respect to the trigger 7 which is allowed to oscillate and is suspended forward. In the trigger type liquid ejector that enables the trigger rearward pulling operation only at the disengagement position,
The first engaging plate 12 protrudes backward from the lower end portion of the sliding vertical plate 11 with the fitting hole 13 in which the stopper member 10 is loosely fitted to the outer surface of the fitting cylinder 4, and from the lower surface of the rear portion of the first engaging plate. Formed by hanging the engaging projection 12a,
When the stopper member is lowered, the rear surface of the second engagement plate 14 projecting rearward from the upper part of the trigger is engaged with the engagement protrusion 12a. When the stopper member is raised, the first engagement plate 12 is moved to the lower surface of the injection cylinder 3. The engagement protrusion 12a and the second engagement plate 14 are formed so as not to engage with each other .
Further, a projecting plate 15 protrudes in an outward flange shape from the outer surface portion excluding the lower surface of the fitting cylinder 4 , and guide plates 17 and 17 having longitudinal grooves 16 and 16 on the inner surface forward from the left and right outer ends of the projecting plate. The left and right sides of the sliding vertical plate 11 were fitted into the vertical grooves so as to be movable up and down.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The drawings will be described below. First, a conventionally known structure will be briefly described. 1 is a container body, 2 is a mounting cylinder fitted to the mouth and neck of the container body, and the main cylinder is raised from the inside of the mounting cylinder. The injection cylinder 3 protrudes forward. The fitting cylinder 4 protrudes forward from the front end surface of the injection cylinder, and the nozzle cap 5 is rotatably fitted to the outer surface of the fitting cylinder. Further, the cylinder 6 is provided so as to incline downward and forward from the lower surface of the front portion of the main tube and the rear portion of the injection tube. Further, the trigger 7 is suspended from the front portion of the injection cylinder 3 so as to be swingable in the rear direction, and the plunger 8 push-in plate 9 is forwardly urged into the cylinder from the rear surface of the trigger to protrude.
[0008]
Further, between the front end of the injection cylinder 3 and the nozzle cap 5, the sliding vertical plate 11 of the stopper member 10 that projects the first engagement plate 12 backward from the lower end of the sliding vertical plate 11 is slid as shown in FIG. A fitting hole 13 formed in the moving vertical plate is loosely fitted to the outer surface of the base of the fitting cylinder 4 so as to freely move up and down, and hangs down. Further, an engaging element 5a shown in FIG. 3 is projected from a part of the rear end surface of the nozzle cap 5 and is loosely inserted into the fitting hole 13, and the engaging element 5a is turned by rotating the nozzle cap 5. When it moves along the outer surface of the fitting cylinder 4 and is positioned above the upper surface of the fitting cylinder as shown in FIG. 4, the sliding vertical plate 11 is pushed up, and the engaging element 5a is inserted into the fitting cylinder 4 as shown in FIG. The sliding vertical plate 11 is provided so as to descend by moving to the outer side.
[0009]
In the present invention, when the sliding vertical plate 11 is pushed up as shown in FIG. 4, the first engagement plate 12 protruding rearward from the lower end of the sliding vertical plate does not contact the lower surface of the front portion of the injection cylinder 3. The sliding vertical plate 11 was provided short so as to be close to each other. The first engaging plate 12 hangs from the lower surface of the rear portion of the engaging protrusion 12a. As shown in FIG. 4, when the stopper member 10 is raised, the trigger 7 can swing backward. That is, as shown in FIG. 1, when the stopper member is lowered, the second engaging plate 14 protruding from the rear surface of the trigger 7 is in contact with the front surface of the engaging protrusion 12a, so that the trigger cannot swing backward. However, as shown in FIG. 4, the engaging protrusion 12a moves upward as the stopper member 10 is raised, so that the second engaging plate 14 and the engaging protrusion 12a are not engaged even when the trigger 7 is swung. Therefore, the plunger push-in plate 9 provided below the second engagement plate 14 pushes the plunger 8 against the urging force inside the cylinder, and ejects liquid from the nozzle cap through the injection cylinder by cylinder pressurization. To do.
[0010]
The trigger portion above the second engagement plate 14 is formed by an arm plate formed by extending the left and right side plates of the trigger, and as shown in FIG. The arm plate tip is positioned so as to rise to both sides of the injection cylinder when the trigger is pulled backward.
[0011]
Further, in the present invention, the protruding plate 15 is projected in a flange shape from the outer surface portion excluding the lower surface of the fitting cylinder 4 , and the longitudinal grooves 16 and 16 are formed on the inner surface forward from the left and right outer ends of the protruding plate. The guide plates 17 and 17 having protrusions are protruded, and the left and right side portions of the sliding vertical plate 11 are fitted into the vertical grooves as shown in FIG.
[0012]
In the above configuration, when the stopper member 10 is lowered as shown in FIG. 1, the rear end surface of the second engagement plate 14 protruding rearward from the upper portion of the trigger 7 even if the trigger 7 is swung back. However, since it is in contact with the front surface of the engagement cylinder portion 12a, it cannot be swung back, and the plunger pushing plate 9 protruding rearward from the trigger cannot push the plunger 8 as well. At this time, the nozzle hole 5b of the nozzle cap is closed.
[0013]
Next, when the nozzle cap 5 is rotated and the engaging element 5a is moved to the upper surface of the fitting cylinder 4, the sliding vertical plate 11 is fitted into the vertical grooves 16 and 16 of the guide plates 17 and 17 on both left and right sides. Therefore, the first engagement plate 12 of the stopper member 10 is pulled up to the vicinity of the lower surface of the injection cylinder 3, and thus the trigger 7 can be swung back. At this time, the nozzle hole 5b is opened, so that the liquid in the injection cylinder is ejected through the nozzle hole.
[0014]
【The invention's effect】
The present invention has the above-described configuration. When the stopper member 10 is raised by the rotation of the nozzle cap 5 as described in claim 1, the first engagement plate 12 of the stopper member does not contact the lower surface of the injection cylinder 3. Since they are provided close to each other, the height of the stopper member can be made shorter than that of the conventional example described above, and therefore the molding material for the stopper member can also be reduced. Therefore, the nozzle cap for moving the stopper member up and down can be easily turned.
[0015]
Further, the protruding plate 15 protrudes outward from the outer surface portion excluding the lower surface of the fitting cylinder and protrudes forward from the left and right outer ends of these protruding plates, and guide plates 17 and 17 having longitudinal grooves 16 and 16 on the inner surface protrude. The left and right sides of the sliding vertical plate 11 are fitted in the vertical grooves so that they can be moved up and down. It becomes easy to move up and down. In the above-described conventional example, as a mechanism corresponding to the fitting of the left and right sides of the sliding vertical plate 11 in the vertical grooves 11 and 11 in the present invention, a guide is provided from the front of one side of the overhanging plate. projecting pins 33 as also the pin 33 because I have allowed vertically movable fitted with drilled sliding vertical plates horizontal direction while the vertical hole to said longitudinal bore, the compared to the prior art for invention may not be provided pins 33 and guide slot 27 for the pin moves up and down, which like the pin 33 and the guide long hole portion only overhang plate and sliding the vertical plate horizontal width may be narrow and providing a .
[Brief description of the drawings]
FIG. 1 is a side view of a liquid ejector of the present invention, partially cut away.
FIG. 2 is a front view showing a state in which a cover is removed from the liquid ejector;
FIG. 3 is an enlarged cross-sectional view of FIG. 1A-A ′ line viewed in the direction of the arrow.
FIG. 4 is a cross-sectional view of a main part shown in a state where a stopper member is pushed up.
FIG. 5 is an enlarged plan view showing a positional relationship between an injection cylinder and a trigger upper end.
[Explanation of symbols]
3 ... Injection cylinder 4 ... Fitting cylinder 5 ... Nozzle cap 5a ... Engagement element 7 ... Trigger 10 ... Stopper member
11 ... Sliding vertical plate 12 ... First engaging plate
12a ... engagement protrusion 14 ... second engagement plate
15 ... Overhang plate 16 ... Vertical groove
17 ... Guide plate

Claims (1)

The nozzle cap 5 is rotatably fitted to the outer surface of the fitting tube 4 projecting forward from the front end surface of the injection tube 3, and the outer surface of the fitting tube 4 is interposed between the injection tube 3 and the nozzle cap 5. A stopper member 10 fitted to be freely movable up and down is formed so that it can be raised by rotating the nozzle cap 5 in the forward direction and lowered by turning in the reverse direction, and from the front of the injection cylinder to the rear. The lower part of the stopper member 10 is engaged in the lowered position and disengaged in the raised position with respect to the trigger 7 that is swingable and urged forward to hang down. In the trigger type liquid ejector that enables the trigger pulling operation only at the disengagement position,
The first engaging plate 12 protrudes backward from the lower end portion of the sliding vertical plate 11 with the fitting hole 13 in which the stopper member 10 is loosely fitted to the outer surface of the fitting cylinder 4, and from the lower surface of the rear portion of the first engaging plate. Formed by hanging the engaging projection 12a,
When the stopper member is lowered, the rear surface of the second engagement plate 14 projecting rearward from the upper part of the trigger is engaged with the engagement protrusion 12a. When the stopper member is raised, the first engagement plate 12 is moved to the lower surface of the injection cylinder 3. The engagement protrusion 12a and the second engagement plate 14 are formed so as not to engage with each other .
Further, a projecting plate 15 protrudes in an outward flange shape from the outer surface portion excluding the lower surface of the fitting cylinder 4 , and guide plates 17 and 17 having longitudinal grooves 16 and 16 on the inner surface forward from the left and right outer ends of the projecting plate. A trigger type liquid ejector characterized in that the right and left sides of the sliding vertical plate 11 are fitted in the vertical grooves so as to be movable up and down .

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