JPH10128187A - Trigger type liquid jet device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the lock operation of a trigger by suspending a stopper from the intermediate part of the rear surface of a trigger capable of sucking up the liquid in a container by shaking operation to jet the same from a nozzle orifice and making the same engageable with a part of the front end surface of the lower part of the cylinder in a freely detachable manner. SOLUTION: In a trigger type liquid jet device 1 constituted so that the front end part of the plunger 6 forwardly energized into a cylinder 5 to be fitted therein is engaged 6a with the rear surface of the upper part of a trigger 21 and the liquid in a container is sucked into the cylinder 5 by the return of the trigger to be jetted through an injection cylinder 4, an engaging plate 24 is fitted to the rear surface of the intermediate part in the up and down direction of the trigger 21 formed by rearwardly protruding sidewalls from the left and right parts of a front wall 22 so as to be horizontally disposed between the sidewalls. A base end part 25 is pivotally fitted between both left and right sidewall parts just under the engaging plate 24 to form a stopper 26 molded separately from the trigger 21 in a suspended state. This stopper 26 sets the trigger 21 to a lock state when a first engaging ridge 30 gets over the front end surface 5a of the lower part of the cylinder 5 to be engaged.

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 For example, as disclosed in JP-A-8-196958,
A vertical cylinder is erected from the upper part of the mounting cylinder to be fitted to the outer surface of the neck of the container body, and the injection cylinder is projected forward from the upper end of the vertical cylinder, and the trigger is suspended by pivotally attaching to the front of the injection cylinder,
Further, the plunger is biased forward and fitted into the cylinder protruded forward from the vertical cylinder, the plunger front end is engaged with the upper rear surface of the trigger, and the trigger draws the liquid in the cylinder to the injection cylinder front end. The nozzle is ejected from the nozzle hole of the fitted nozzle head via the nozzle fitting cylinder, and the plunger moves forward by releasing the trigger to reduce the pressure in the cylinder and the trigger returns. 2. Description of the Related Art Trigger-type liquid ejectors provided so that body fluid is sucked into a cylinder are well known.

The above liquid ejector ejects the liquid even if the trigger is pulled by mischief. Therefore, in order to eliminate such a drawback, as a safety device, a nozzle fitting cylinder fitted to the front end of the injection cylinder and the nozzle fitting cylinder are used. With the nozzle head fitted to the front of the fitting tube,
When the first half and the second half of the liquid discharge path are separately provided, and the nozzle head is rotated with respect to the nozzle fitting cylinder, the first half and the second half of the liquid discharge path communicate with each other, and are further rotated or reversed. It is practiced that the rotation interrupts the communication between the front half and the rear half.

[0004]

As described above, even in the liquid ejector provided so as to open and close the liquid discharge path by rotating the nozzle head with respect to the nozzle fitting tube, the liquid discharge path remains closed. When the trigger is pulled frequently, the trigger bends and resiliently restores, so that the plunger retreats and moves forward a little. The high-pressure liquid may be stored in the front part of the injection cylinder between the liquid discharge path part formed by the nozzle fitting cylinder and the like, and when this occurs, when the nozzle head is turned to the liquid discharge path communication position, The high-pressure liquid stored in the front part of the injection cylinder spouted from the nozzle hole regardless of the trigger operation. Further, if the trigger is strongly pulled, the nozzle head may come off from the nozzle fitting cylinder due to the high pressure in the injection cylinder.

According to the present invention, the stopper hangs freely from the middle portion of the rear surface of the trigger to the upper rear, the stopper is raised substantially rearward and upward in the state where the trigger is located at the front end, and the lower end of the stopper is moved to the cylinder. The plunger is provided so as to be able to be engaged with the lower front end surface of the plunger so that the plunger does not retreat at all even if the trigger is bent by the trigger pulling operation.

[0006]

As a first means, a vertical cylinder 3 is erected from inside a mounting cylinder 2 to be fitted to the mouth and neck of a container body.
Further, the injection cylinder 4 is projected forward from the upper end of the vertical cylinder, and the cylinder 5 is projected forward from the middle part. The trigger 21 is engaged with the upper rear surface of a vertically extending trigger 21 so that the liquid in the container can be sucked up by the operation of the trigger and can be ejected from the nozzle hole 10 of the nozzle head 8 fitted to the front end of the injection cylinder 4. In the provided trigger-type liquid ejector, a plate-shaped or rod-shaped stopper 26 is vertically suspended from the rear surface of the middle part in the longitudinal direction of the trigger 21 so as to freely swing upward and backward, and the trigger 21 is positioned at the front end. , Stopper 26
, A part of the lower end face of the stopper is detachably engaged with a part of the lower front end face 5a of the cylinder 5, so that the trigger operation in the engaged state is disabled.

As a second means, the above-mentioned first means is provided, and the trigger 21 is moved from both left and right sides of the front wall 22 to the side walls 23,
23 is formed so as to project rearward, and a stopper 26 formed separately from the trigger by hanging the base end portion 25 between the side walls 23 and 23 of the middle portion in the longitudinal direction of the trigger is hung down. When engaging the lower end surface of the stopper with the lower front end surface 5a of the cylinder 5, a first engaging ridge 30 capable of forcibly moving over the lower front end surface 5a of the cylinder is provided on a part of the end surface. A second engaging ridge that engages with a rear end face of an engaging plate 24 provided between both side wall portions immediately above the pivoting portion 26a of the stopper base end portion.
31, respectively.

As a third means, the first means is provided, and a stopper 26 is suspended from a rear portion of the trigger 21 via a thin hinge 26b, and the trigger 21 and the stopper 26 are integrally formed of a synthetic resin material.

As a fourth means, the above-mentioned first means is provided and a part of the front wall of the lower half of the trigger 21 is formed by a thin hinge 26b at the upper end edge, and separation lines 44, 4 are formed between the left and right side edges and the lower edge.
4 to form a vertically long plate-like portion 45, and a rib 46 is vertically provided on a rear surface portion except for a lower portion of the vertically long plate-like portion. Lower front end face
The engaging portion on the lower end surface of the stopper 26 to be
It is formed by a concave portion 47 provided in the front portion of the lower end surface, and when the cylinder lower front end surface 5a is engaged in the concave portion, the vertically long plate-like portion 45 is formed.
The lower rear surface is formed so as to be engageable with the front lower surface 5b of the cylinder 5, and the trigger with stopper is integrally formed of a synthetic resin material.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a basic structure known in the prior art will be briefly described. Reference numeral 1 denotes a generally used type of trigger type liquid ejector. As is well known, the liquid ejector raises a vertical cylinder 3 from the upper part of the mounting cylinder 2 which is screwed to the outer surface of the mouth and neck of the container body. Cylinder 5 from the middle front
The front end of the plunger 6 is projected forward, and the upper end is pivotally attached to the front part of the injection cylinder, the trigger 21 is vertically suspended obliquely downward, and the plunger 6 front end fitted by being urged forward into the cylinder 5 is fitted. Engage 6a with the upper rear surface of the trigger 21 to cause the liquid in the cylinder to be ejected through the injection cylinder 4 by the trigger pulling operation, and to suck the liquid in the container into the cylinder by negative pressure in the cylinder 5 by returning the trigger. It is provided as possible. 3a
Is a suction valve, and 3b is a discharge valve.

At the front of the injection cylinder 4, a nozzle fitting cylinder 7 is provided.
The nozzle head 8 is fitted through the nozzle hole, and a liquid discharge path 11 is formed in the nozzle head 8 to connect the injection cylinder 4 and a nozzle hole 10 formed in the center of the front plate 9 of the nozzle head 8. . The liquid discharge path is fitted watertight from the outer surface of the valve stem 13 projecting forward from the center of the substrate 12 of the nozzle fitting cylinder 7 to the outer surface of the valve stem 13 from the center of the front plate 9 of the nozzle head 8 as shown in the figure. It is formed together with the inner surface of the fitting cylinder 14 projecting rearward. That is, a first discharge path 11a formed in the rear inner surface of the fitting tube in the cylinder direction, and a second discharge path 11b formed in the front outer surface of the valve rod 13 in the generatrix direction.
When the nozzle head 8 is rotated with respect to the nozzle fitting cylinder 7 from the communication state shown in the drawing, the first discharge path 11a
Moves to another position on the valve rod 13 to interrupt communication with the second discharge path 11b, and returns to the original position by returning the nozzle head 8 to the original position. In the illustrated example, the lid plate 15 is pivotally attached to the front end of the nozzle head 8 so as to be able to move up and down. The embodiment of the present invention shown in FIG. 1 will be described below. A trigger 21 formed by projecting rear walls 23, 23 rearward from the left and right sides of a front wall 22 is provided between the left and right side walls on the rear surface in the vertical middle part. An engaging plate 24 is provided, and a stopper 26 formed separately from the trigger by hanging the base end 25 between the left and right side wall portions immediately below the engaging plate is vertically provided. The stopper is the upper plate 27
The rear plate 28 is hung from the rear end, and the rear side edge is connected to the left and right sides of the rear plate from the left and right side edges of the upper plate.
Hang 9 and 29. As shown in the figure, the lower end of the rear plate 28 is the side plate 29,
29 The projection is formed to be slightly longer than the lower end, and the projection is used as the first engagement ridge 30. On the rear surface of the rear plate 28, a rib as a second engaging ridge 31 is provided vertically. As shown in the figure, the stopper 26 is rotatable obliquely upward from the state where the trigger 21 is located at the front end, and the first engagement ridge 30 forcibly crosses the lower front end surface 5a of the cylinder 5 so that the side plate 29, The lower surface of the cylinder 29 can be engaged with the front end face 5a of the cylinder lower part. At this time, the upper end surface of the second engagement ridge 31 is formed so as to be able to engage with the rear end surface of the engagement plate 24. In addition, from the pivot 21a of the trigger 21 to the pivot of the stopper 26
The distance to 26a is from the trigger pivot 21a to the cylinder 5
Is provided longer than the distance to the lower front end face 5a.

FIG. 2 shows a second embodiment, in which a trigger 21 is formed by projecting rear walls 23, 23 from both left and right sides of a front wall 22 and an intermediate portion in the vertical direction of the trigger. Two engaging plates 24a, 24b are provided laterally between the side walls 23, 23, and a thin hinge 26 is provided from the rear end of the lower engaging plate 24a.
The stopper 26 is hung via b. The stopper is
A plate portion 36 having substantially the same width as that of the lower engagement plate is hung down, and a rib 37 having a T-shaped cross section is provided vertically on the rear surface of the plate portion.
It is desirable that a recess 38 be formed in a portion of the rib near the lower front. When the trigger 21 is rotated obliquely rearward in a state where the trigger 21 is located at the front end as shown in FIG.
The upper surface is in contact with the rear end surface of the upper engagement plate 24b, and at this time, the lower front end surface 5a of the cylinder 5 is engaged with the recess 38. 3 and 4 show a third embodiment.

Also in this embodiment, the trigger 21 is formed by projecting the side walls 23, 23 rearward from both left and right sides of the front wall 22,
An engaging plate 24 is provided laterally between the left and right side walls of the front wall vertical intermediate portion, and a stopper is provided from a rear end of the engaging plate via a thin hinge 26b.
Hanging 26. As shown in FIG. 4, the stopper is formed by an engagement plate 24, a plate portion 41 having substantially the same width and a rear protruding plate portion 41b protruding rearward from a lower portion of the plate portion, and the trigger 21 is located at the front end. By rotating the stopper 26 obliquely upward and rearward from the state in which the cylinder 5 is engaged, the lower portion of the plate portion 41 is engaged with the front lower surface 5b of the cylinder 5, and the lower surface of the rear protruding plate portion 42 is connected to the lower front end surface 5a of the cylinder 5. Is provided so as to be engaged.

In the third embodiment and the second embodiment described above, the upper front wall portion of the engagement plate 24 and the engagement plate 24a
Although window holes 42 and 42 are formed in the lower front wall portion, these are die-cut holes when the trigger with stopper is integrally molded with a synthetic resin material, and are not necessarily required. .

FIGS. 5 and 6 show a fourth embodiment. In this embodiment, a part of the front wall 22 of the trigger 21 is formed on a stopper 26 which is integrally suspended from the trigger.
21 has a U-shaped cross section in which the left and right side walls 23, 23 project rearward from the left and right sides of the front wall 22, and a part of the front wall of the lower half of the trigger is formed by a thin hinge 26b at the upper end edge and the left and right side edges. The lower end edge is surrounded by a separation line 44 to form a vertically long plate-like portion 45, and a rib 46 is vertically provided on a rear surface portion excluding a lower portion of the vertically long plate-like portion. Thus, the stopper 26 is formed. The rib 46 is not provided over the entire length of the vertically long plate-like portion 45, but a portion having no rib is provided below the vertically long plate-like portion.
Is formed. As shown in FIG. 5, by rotating the stopper 26 upward and backward in a state where the trigger 21 is located at the front end, the lower part of the vertically long plate-like portion 45 having no rib 46 becomes the front portion of the cylinder 5. The lower front end surface 5a of the cylinder is provided so as to be in contact with the lower surface 5b and fit into the recess 47.

As described above, each of the second, third, and fourth embodiments is
An example is shown in which the trigger 21 and the stopper 26 are all connected via a thin hinge and are integrally formed of a synthetic resin material.
In each of these embodiments, as in the case of the first embodiment, the distance from the pivot portion 21a of the trigger 21 to the lower front end surface 5a of the cylinder 5 is smaller than the distance between the thin hinge 26b connecting the trigger and the stopper. Is provided with a long distance.

In each of the above-described embodiments, if the trigger 21 is operated while the stopper 26 is hanging down, the stopper 26 may swing and hinder the operation. As shown in FIGS. Engagement projections 48, 48 are attached to the left and right side walls 23 of the trigger in front of the stopper 26, and the trigger 21 is pushed between the left and right side walls, so that the left and right side surfaces of the stopper 26 are engaged with the engagement projections. The stopper can be prevented from swinging.

[0018]

According to the liquid ejecting apparatus of the present invention, a vertical cylinder is erected from a mounting cylinder fitted to the mouth and neck of a container body, and is ejected from an upper end of the vertical cylinder. The cylinder and the cylinder are projected forward from the middle of the vertical cylinder, respectively,
The front end of the plunger fitted by being urged forward into the cylinder is engaged with the upper rear surface of a trigger that is vertically swingable from the front of the injection cylinder in the front-rear direction. In a liquid ejector capable of sucking liquid and ejecting from a nozzle hole of a nozzle head at a front end of an injection cylinder,
The stopper 26 hangs down from the middle part of the rear surface of the trigger 21, and the stopper 26 is raised obliquely rearward from the state where the trigger is located at the front end, so that a part of the lower end surface of the stopper becomes part of the lower front end surface of the cylinder 5. The stopper 26 is detachably engaged to disable the trigger operation in the engaged state.
When the trigger 21 is locked by being engaged with the lower front end face 5a, the plunger 6 is located above the stopper. 26, the trigger portion below the intermediate portion is bent without being moved rearward, so that the plunger retreats due to the bent as in the conventional case, and the pressure in the liquid in the injection cylinder 4 is never increased. . The lower front end face 5a of the cylinder 5 is closest to the trigger 21, so that the length of the stopper 26 which is hung down from the trigger and is engaged with the lower front end face of the cylinder can be shortened to increase its rigidity, and the engagement can be improved. At the time of the detaching operation, the mounting cylinder 2 and the container body do not interfere, and the operation can be easily and reliably performed.

According to a second aspect of the present invention, the liquid ejector has the same effect as that of the first aspect of the invention, and the stopper 26 is formed as a separate member from the trigger 21, so that the left and right side walls 23, 23 of the trigger are provided. The base end 25 is pivoted between
A first engaging ridge 30 capable of forcibly climbing over the cylinder lower front end face 5a is provided on a part of the lower end face of the stopper, and the lower rear face of the stopper is laterally provided between both side walls immediately above the stopper connecting portion. Since the second engaging ridges 31 that engage with the rear end face of the engaging plate 24 are additionally provided, the strength of the stopper can be increased and the function of the stopper can be enhanced.

According to a third aspect of the present invention, the liquid ejector has the same effects as those of the first aspect, and the stopper is formed integrally with the trigger from a synthetic resin material to form the trigger. Is easy.

In the case of the fourth aspect, in addition to the effects of the liquid ejector of the first aspect, a part of the trigger front wall 22 is
The upper edge is a thin hinge 26b, and the left and right edges and the lower edge are surrounded by a separating line to form a vertically long plate-like portion 45, and a rib 46 is provided vertically on the rear surface except for the lower portion of the vertically long plate-like portion 45. The vertical plate-like portion with ribs serves as a stopper 26, and a concave portion 47 provided at the front lower end surface of the rib 46 serves as an engagement portion with the cylinder lower front end surface 5a. Shape 45
Since the lower rear surface of the cylinder is provided so as to engage with the lower surface of the front part of the cylinder, and the trigger with the stopper is integrally formed of a synthetic resin material, the molding of the trigger is easy, and the engagement of the stopper with the front surface of the cylinder lower part. Can be easily and reliably performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a liquid ejector of the present invention shown in a first embodiment.

FIG. 2 is a sectional view of the liquid ejector shown in the embodiment of FIG. 2;

FIG. 3 is a sectional view of a liquid ejector shown in a third embodiment.

4 is an enlarged perspective view of a main part of the liquid ejector of FIG. 3;

FIG. 5 is a sectional view of a liquid ejector shown in a fourth embodiment.

FIG. 6 is an enlarged front view of a main part of the liquid ejector.

[Explanation of symbols]

4 ... Injection cylinder 5 ... Cylinder 21 ... Trigger 26 ... Stopper

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takashi Fujie 3-2-6 Oshima, Koto-ku, Tokyo Inside Yoshino Kogyo Co., Ltd.

Claims (4)

[Claims] 1. A vertical cylinder (3) is erected from inside a mounting cylinder (2) to be fitted to the mouth and neck of a container body, and an injection cylinder (4) is positioned from an upper end of the vertical cylinder.
And a trigger in which a front end of a plunger 6 fitted forward by projecting the cylinder 5 forward from the intermediate portion and biasing the cylinder 5 forward into the cylinder is swingably provided in the front-rear direction from the front end of the injection cylinder. A trigger type liquid ejector provided to be engaged with the upper rear surface of the nozzle 21 and to be capable of sucking up the liquid in the container by the operation of the trigger and ejecting from the nozzle hole 10 of the nozzle head 8 fitted to the front end of the injection cylinder 4. A plate-shaped or rod-shaped stopper 26 is vertically suspended from the rear surface of the middle part in the longitudinal direction of the trigger 21 to be able to swing upward and rearward, and the stopper 26 is raised obliquely rearward from the state where the trigger 21 is located at the front end. Thus, a part of the lower end surface of the stopper is detachably engaged with a part of the lower front end surface 5a of the cylinder 5, so that a trigger operation in the engaged state is disabled. Spouter. 2. The trigger 21 is formed by projecting rear walls 23, 23 from both left and right sides of a front wall 22 and a base end 25 is provided between both side walls 23, 23 at an intermediate portion in the longitudinal direction of the trigger. When the stopper 26 is pivotally attached and formed separately from the trigger, the stopper 26 is suspended, and when the lower end surface of the stopper is engaged with the lower front end surface 5a of the cylinder 5 at a part of the lower end surface of the stopper, the lower end front surface 5a of the cylinder 5 is forced over. A first engaging ridge 30 is formed on the lower rear surface of the stopper 26. The second engaging ridge 30 is engaged with the rear end surface of the engaging plate 24 provided between the side wall portions immediately above the pivotal connection portion 26a of the stopper base end. 2. The trigger type liquid ejector according to claim 1, wherein the engagement ridges 31 are respectively provided. 3. A trigger type liquid jet according to claim 1, wherein a stopper is suspended from a rear portion of the trigger via a thin hinge and a trigger is integrally formed of a synthetic resin material. vessel. 4. A part of the front wall of the lower half of the trigger 21, the upper edge of which is a thin hinge 26b, and the left and right side edges and the lower edge are separated by separating lines 44, 44 to form a vertically long plate-like portion 45, A rib 46 is vertically provided on a rear surface portion except a lower portion of the vertically long plate-like portion, and the vertically long plate-like portion with the rib serves as a stopper 26, and is engaged with a lower front end surface 5a of the cylinder 5. Is formed by a concave portion 47 provided at the front of the lower end surface of the rib 46, and when the lower front end surface 5a of the cylinder is engaged in the concave portion, the lower rear surface of the vertically long plate-like portion 45 becomes the front portion of the cylinder 5. 2. The trigger type liquid ejector according to claim 1, wherein the trigger with stopper is formed so as to be engageable with the lower surface 5b, and the trigger with the stopper is integrally formed of a synthetic resin material.