JPH1043647A - Trigger type liquid sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a resin material re-usable at the time of discarding a liquid sprayer by journalling a front end part of a piston rod to an upper part rear face of a trigger and at the same time projecting a plate spring out of a lower end of the trigger toward the upper and rear side through an elastic plate part and unitedly forming the trigger, the elastic plate part, and the plate spring with a synthetic resin material. SOLUTION: A sprayer main body 30 comprising a rising cylindrical part 2, a cylinder 3, and a jetting out cylindrical part 4 is fitted in an installation cylindrical part 1 to be installed in an aperture neck part of a container body by screwing. A nozzle cylinder 5 is fitted in the front end of the jetting out cylindrical part 4 and a trigger 6 hung while being journalled to the front part of the jetting out cylindrical part 4 is joined to the front end of a piston rod 8. At that time, a plate spring 9 is projected out of the lower end of the trigger 6 through a folded back part, the tip end of the plate spring 9 is engaged with a recessed part 10 of the cylinder 3, moreover the front end of the piston rod 8 is journalled 11 to the upper rear side of the trigger 6, and the piston 7 is urged forward through the piston rod 8. The trigger member provided with the plate spring and constituted of these trigger 6, folded back part, and the plate spring 9 is unitedly formed from a synthetic resin material.

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 shown in Japanese Utility Model Laid-Open No. 6-34759,
A mounting tubular portion to be fitted to the outer surface of the mouth and neck of the container body is attached to the lower end of the upright cylindrical portion, and a cylinder is projected forward from an intermediate portion of the upright cylindrical portion and an injection tubular portion from the upper end of the upright cylindrical portion. Further, the trigger projects forward from the cylindrical piston fitted to the upper rear surface of the trigger which is pivotally attached to the front part of the injection cylinder part and oscillates in the front-rear direction so as to swing forward and backward into the cylinder. A trigger-type liquid provided so that the front end of the piston rod is locked, the liquid in the container is sucked into the cylinder by the swinging operation of the trigger, and the liquid in the cylinder is ejected from the nozzle cylinder fitted to the front end of the injection cylinder. Ejectors are known.

[0003]

In the above-mentioned conventional trigger type liquid ejector, the spring for urging the cylindrical piston forward is formed by a metal coil spring, and the other members are formed by a synthetic resin material. . Therefore, when the liquid ejector is discarded, the synthetic resin member and the metal coil spring are both discarded, but this makes it difficult to reuse the synthetic resin member.

[0004] The liquid ejector according to the first or second aspect is formed of only a synthetic resin member without using a metal spring, so that the synthetic resin material can be reused. Also, instead of the forward biasing of the cylindrical piston, the trigger is biased forward by a leaf spring integrally molded with the trigger from a synthetic resin material, and the cylindrical piston pivots with the front end of the piston rod to the upper part of the trigger together with the trigger. The trigger type liquid ejector is provided so that it can be slid forward and backward in the cylinder and the trigger type liquid ejector can be formed at low cost by simplifying the member structure by integrally forming the trigger and the leaf spring.

A liquid ejector according to a third aspect of the present invention has the above-mentioned problems of the liquid ejector according to the first or second aspect, and further has a thin and narrow elastic plate portion from the lower end of the trigger to be displaced from the plate portion. Also, a thick and wide leaf spring is protruded in a folded shape, and engagement means provided on the base end of the leaf spring and the lower rear surface of the trigger so that the base end of the leaf spring does not shift from the lower part of the trigger. It is provided.

According to a fourth aspect of the present invention, there is provided a liquid ejector having the solution of the first, second, or third aspect of the present invention, and the front end of the piston rod is pivotally attached to the upper rear surface of the trigger. It is provided for ease of use.

[0007]

As a first means, a mounting cylinder portion 1 fitted to the outer surface of the mouth and neck of a container body is attached to the lower end of an upright cylinder portion 2 and a cylinder is inserted from an intermediate portion of the upright cylinder portion. 3, and the injection cylinder 4 protrudes forward from the upper end of the upright cylinder, respectively, and is further pivotally attached to the front part of the injection cylinder 4 so as to swing upward in the front-rear direction. The front end of the piston rod 8 protruding forward from the cylindrical piston fitted into the cylinder is locked, the liquid in the container is sucked into the cylinder by the swinging operation of the trigger, and the liquid in the cylinder is discharged into the injection cylinder. 4 In a trigger type liquid ejector provided so as to be able to eject from a nozzle cylinder 5 fitted to the front end,

The front end of the piston rod 8 is pivotally connected 11 to the upper rear surface of the trigger 6, and the leaf spring 9 projects upward and backward from the lower end of the trigger 6 via an elastic plate portion 20 for forming a folded portion. The distal end was locked at the rear of the lower surface of the cylinder, and the trigger 6, the elastic plate portion 20, and the leaf spring 9 were integrally formed of a synthetic resin material.

As a second means, a mounting cylinder 1 to be fitted to the outer surface of the mouth and neck of the container body is attached to the lower end of the upright cylinder 2 and the cylinder 3 is inserted from the middle of the upright cylinder to the upright cylinder. The injection cylinder portion 4 projects forward from the upper end of the portion, and is further pivotally attached to the front portion of the injection cylinder portion 4 and fitted into the upper portion of the trigger 6 which is vertically swingably mounted in the cylinder. The front end of the piston rod 8 protruding forward from the cylindrical piston is locked, the liquid in the container is sucked into the cylinder by the swinging operation of the trigger, and the liquid in the cylinder is fitted to the front end of the injection cylinder 4. In the trigger type liquid ejector provided so as to be able to eject from the nozzle cylinder 5,

The front end of the piston rod 8 is pivotally connected 11 to the upper rear surface of the trigger 6, and the leaf spring 9 projects upward and rearward from the lower end of the trigger 6 via the elastic plate portion 20 for forming a folded portion. The distal end is formed into a forked portion 9b, and the forked portion is connected to the ejector main body 30 having the upright cylinder 2, the cylinder 3, and the injection cylinder 4 and the mounting cylinder 1. The trigger 6 and the elastic plate
20 and the leaf spring 9 were integrally formed of a synthetic resin material.

As a third means, the above-mentioned first or second means is provided, and the folded plate portion is formed of a thin and narrow elastic plate portion 20. A leaf spring 9 thicker and wider than the plate portion protrudes, and engagement means 21 provided at the lower end of the leaf spring and the lower rear surface of the trigger 6 are provided.
Thus, the folded state of the leaf spring with respect to the trigger 6 was securely held.

As a fourth means, there is provided the first, second, or third means described above, and the cylinder 15 projects rearward from the upper rear surface of the trigger 6 and small and short from both right and left sides of the rear end of the cylinder. The shafts 16, 16 are protruded inward, and these small short shafts 16, 16 are formed in shaft holes 8 b, 8 b formed in the left and right side surfaces of the front portion of the piston rod 8.
It was fitted inside.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a general structure of a trigger-type liquid ejection device will be described. Reference numeral 1 denotes a mounting cylinder portion which is screwed to the outer surface of the neck of a container body. And an upper closed cylindrical portion 1a is provided at the center of the top wall closing the upper surface of the fitting cylindrical portion, and an annular concave groove having an upper surface opening is further provided on the top wall portion surrounding the outer periphery of the cylindrical portion. ing.

On the upper surface of the mounting cylinder portion 1, an upright cylinder portion 2,
A cylinder 3 protruding forward from an intermediate portion of the upright cylindrical portion 2;
An ejector body 30 having an injection cylinder 4 projecting forward from the upper end of the upright cylinder 2 is fitted. Note that the ejector body is
The upper surface, the left and right side surfaces, and the rear are covered with a cover 31 integrally formed with the ejector main body. The lower end of the upright cylindrical portion 2 is fitted into the annular groove, and the upright cylindrical portion 2 is surrounded by the cover. The auxiliary cylinder 32 suspended from the inner surface of the cover and the lower surface of the cylinder is fitted to the outer surface of the small-diameter fitting cylindrical portion at the upper portion of the mounting cylindrical portion 1 described above. The outer diameter of the auxiliary cylinder 32 is smaller than the lower half of the mounting cylinder 1. A nozzle cylinder 5 is fitted to the front end of the injection cylinder 4, and the trigger 6 is pivotally mounted to the front of the injection cylinder 4 so that the trigger 6 hangs down from the cylindrical piston 7 fitted into the cylinder. The front end of the provided piston rod 8 is engaged with the upper rear surface of the trigger 6.

Normally, the cylindrical piston 7 is urged forward by a metal coil spring mounted in the cylinder, and the liquid in the cylinder passes through a discharge valve provided at a position different from that shown in the drawing by pulling a trigger. It is provided so that the liquid in the container is sucked into the cylinder 3 through a suction valve formed by a ball valve or the like when the trigger is returned from the nozzle cylinder 5 and the trigger returns.

According to the present invention, instead of the above-mentioned metal coil spring, a leaf spring 9 is projected from the lower end of the trigger 6 upward and rearward through a folded portion, and the tip of the leaf spring 9 is
The front end of the piston rod 8 is pivotally connected 11 to the upper rear portion of the trigger 6 so that the cylindrical piston 7 is moved forward through the piston rod. It is energizing.

The trigger member with a leaf spring formed by the trigger 6, the folded portion, and the leaf spring 9 is integrally formed of a synthetic resin material in a developed shape shown in FIG. In the drawing, the trigger 6 has left and right side plates 13, 13 projecting rearward from the left and right sides of the front plate 12, and extending the left and right side plates upward to extend from the inner surface of the upper end to the left and right sides of the front of the injection cylinder portion 4. The large and short shafts 14 and 14 for shaft hole fitting are formed by projecting inward, and furthermore, the upper part of the front plate is opened, and a tube 15 is protruded rearward from the periphery of the opening. As shown in FIG. 3, the small and short shafts 16, 16 project inward from the portion.

At the lower end of the front plate 12 of the trigger 6, as shown in the figure, a raised protrusion 17 is preferably formed for convenience of finger hooking, that is, for preventing finger slippage. A thick portion 18 is provided as a base portion on the rear surface of the front plate portion at the upper end of the protruding projection, and a holding plate 19 is provided from the left and right sides of the lower end of the thick portion to the left and right side plate portions as shown in FIG. , 19 are attached.

The folded-back portion is provided with a thin and narrow elastic plate portion 20 protruding from the middle in the left-right direction of the lower end of the front plate 12, and has a thicker and wider than the elastic plate portion from the front end of the elastic plate portion. The leaf spring 9 is formed to protrude. The elastic plate portion 20 is formed to have a slightly larger width than the gap between the holding plates 19, 19, and the distal end portion of the elastic plate portion 20 is fixed between the holding plates as shown in FIG. 1 and FIG. It can be fitted. At this time, the left and right side portions 9a, 9a of the lower end surface of the leaf spring 9 are engaged with the upper surfaces of the holding plates 19, 19. The elastic plate portion 20, the holding plates 19, 19, and the lower end portion of the leaf spring 9 form an engaging means 21 between the rear surface of the lower part of the trigger and the lower end portion of the leaf spring 9. Any structure may be used as long as the lower end of the leaf spring is securely engaged with the rear surface of the lower portion of the trigger so as to maintain the engaged state, and may be changed within a range that does not impair the purpose.

The trigger member with a leaf spring is shown in FIG.
As in the second embodiment shown in FIG. 7, the tip of the leaf spring 9 may be formed in the forked portion 9b. In this case, as shown in FIG. 8, an auxiliary cylinder 32 connecting the mounting cylinder 1 and the ejector main body 30 or a cylindrical part connecting the mounting cylinder and the ejector main body instead of the auxiliary cylinder is used. What is necessary is just to fit to an outer surface of a front half part. In the illustrated embodiment, the lower portion of the trigger 6 is located at the front end, the leaf spring 9 is slightly elastically deformed, and the inner surface of the forked portion 9b is pressed against the front surface of the auxiliary cylinder 32.

FIG. 9 shows an embodiment of the cylindrical piston 7 with the piston rod 8. The piston rod projects from the center of the front wall of the front end cylindrical part through a plurality of cylindrical parts sequentially reduced in diameter through the forward facing step part, and the rod part front end is formed as a thick plate-shaped part 8a, and the plate is formed. Shaft holes 8b, 8b are formed on the left and right sides of the rear portion of the plate portion, and slope grooves 8c, 8c for small and short shafts 16, 16 are formed on the left and right sides of the front end of the plate portion.

FIG. 10 shows the valve member 22, and FIG.
As shown in FIG. 8, the suction valve 24 and the discharge valve 25 are formed by fitting a valve member fitting cylinder 23 projecting forward from the center of the cylinder rear wall.

[0023]

According to the present invention, the front end of the piston rod 8 is pivotally attached to the rear surface of the upper portion of the trigger 6, and the elastic plate as a folded portion from the lower end of the trigger. Projecting the leaf spring 9 upward and rearward through the part 20 to lock the tip of the leaf spring 9 at the rear of the lower surface of the cylinder;
Since the trigger, the elastic plate portion 20 and the plate spring 9 are integrally formed of a synthetic resin material, a metal coil spring for urging the cylindrical piston forward by mounting it in the cylinder 3 as in the related art is unnecessary. Therefore, all the constituent members of the trigger-type liquid ejector can be molded with a synthetic resin. Therefore, when the liquid ejector is discarded, the resin material can be reused by being melted as it is. In addition, since the trigger and the leaf spring are integrally formed of a synthetic resin material via the elastic plate portion 20 as a folded portion, the number of members can be reduced and simplification can be achieved, so that the liquid ejector can be inexpensive.

In the case of the liquid ejector according to the second aspect, in addition to the effect of the first aspect, the distal end of the leaf spring 9 is formed with a bifurcated portion.
9b, the bifurcated portion was fitted to the outer surface of the front half of the cylindrical portion connecting the main body of the ejector and the mounting cylindrical portion 1,
Engaging the leaf spring tip with the cylindrical portion can be performed very easily.

In the case of the liquid jetting device according to the third aspect, in addition to the effects described in the first or second aspect, the folded portion is formed by a thin and medium-sized narrow elastic plate portion 20, and from the tip of the elastic plate portion. A plate spring 9 thicker and wider than the elastic plate portion is bored,
Engaging means provided at the lower end of the leaf spring and the rear surface of the lower part of the trigger
Since the folded state of the leaf spring 9 with respect to the trigger 6 is securely held at 21, the leaf spring 9 does not become unstable due to displacement with respect to the trigger when the trigger is operated.

Further, the liquid ejector according to the fourth aspect has the same effects as those of the liquid ejector according to the first, second or third aspect, and also from the left and right sides of the rear end of the cylinder 15 projecting rearward from the upper rear surface of the trigger 6. Small short shafts 16 and 16 are projected inward, and these small short shafts are formed in shaft holes 8 formed in the left and right side surfaces of the front end of the piston rod 8.
b, 8b, the upper part of the trigger can be easily pivotally connected to the front part of the piston rod.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a trigger type liquid ejector according to the present invention.

FIG. 2 is a longitudinal sectional view of a trigger with a leaf spring used in the ejector of FIG. 1;

FIG. 3 is an enlarged perspective view of a main part of the trigger.

FIG. 4 is an enlarged perspective view of a main part of the trigger.

FIG. 5 is an enlarged perspective view of a main part, showing a state in which a leaf spring is folded over a trigger.

FIG. 6 is a longitudinal sectional view of a trigger with a leaf spring shown in another embodiment.

FIG. 7 is a front view of a main part of the trigger.

FIG. 8 is a sectional view of a liquid ejector using the trigger of FIG. 6;

FIG. 9 is a perspective view of a cylindrical piston with a piston rod used in the ejector shown in FIGS. 1 and 8;

FIG. 10 is a perspective view of a valve member used in the ejector of FIGS. 1 and 8;

[Explanation of symbols]

 6: Trigger 8: Piston rod 9: Leaf spring 20: Elastic plate

Claims (4)

[Claims] 1. A mounting cylinder 1 fitted to the outer surface of the mouth and neck of a container body is attached to a lower end of an upright cylinder 2 and a cylinder 3 is inserted from an intermediate portion of the upright cylinder and an upper end of the upright cylinder. Each of the injection cylinders 4 protrudes forward, and
A front end of a piston rod 8 protruding forward from a cylindrical piston fitted into the cylinder is locked on an upper part of a trigger 6 which is pivotally attached to a front portion of the cylinder 6 so as to swing forward and backward. The trigger type liquid ejector provided so that the liquid in the container is sucked into the cylinder by the swinging operation of the cylinder and the liquid in the cylinder can be ejected from the nozzle cylinder 5 fitted to the front end of the ejection cylinder 4. 8 Pivot the front end to the upper rear of the trigger 6 11
At the same time, the leaf spring 9 projects upward and rearward from the lower end of the trigger 6 via the elastic plate portion 20 for forming a folded portion, and the tip of the leaf spring is locked to the rear portion of the lower surface of the cylinder. A trigger type liquid ejector characterized in that the part 20 and the leaf spring 9 are integrally formed of a synthetic resin material. 2. A mounting cylinder 1 fitted to the outer surface of the mouth and neck of the container body is attached to a lower end of the upright cylinder 2, and a cylinder 3 is inserted from an intermediate portion of the upright cylinder and an upper end of the upright cylinder. Each of the injection cylinders 4 protrudes forward, and
A front end of a piston rod 8 protruding forward from a cylindrical piston fitted into the cylinder is locked on an upper part of a trigger 6 which is pivotally attached to a front portion of the cylinder 6 so as to swing forward and backward. The trigger type liquid ejector provided so that the liquid in the container is sucked into the cylinder by the swinging operation of the cylinder and the liquid in the cylinder can be ejected from the nozzle cylinder 5 fitted to the front end of the ejection cylinder 4. 8 Pivot the front end to the upper rear of the trigger 6 11
At the same time, the leaf spring 9 protrudes upward and backward from the lower end of the trigger 6 via the elastic plate portion 20 for forming a folded portion, and the tip end of the leaf spring is formed into a forked portion 9b, so that the forked portion is formed. Is fitted to the outer surface of the front half of a cylinder portion connecting the ejector body 30 having the upright cylinder portion 2, the cylinder 3, and the injection cylinder portion 4 to the mounting cylinder portion 1. A trigger type liquid ejector characterized in that 20 and the leaf spring 9 are integrally formed of a synthetic resin material. 3. The folded plate portion is formed of a thin and narrow elastic plate portion 20, and a leaf spring 9 thicker and wider than the elastic plate portion protrudes from a tip end of the elastic plate portion 20. The engaging means 21 provided at the lower end of the leaf spring and the lower rear surface of the trigger 6
The trigger type liquid ejector according to claim 1 or 2, wherein a leaf spring folded state with respect to the trigger (6) is securely held. 4. A cylinder 15 protrudes rearward from an upper rear surface of the trigger 6, and small and short shafts 16 and 16 extend from both left and right sides of the rear end of the cylinder.
The small short shafts 16, 16 are fitted into shaft holes 8b, 8b formed in the left and right sides of the front part of the piston rod 8. 4. The trigger-type liquid ejector according to 1, 2, or 3.