JPH10146546A - Urging spring member with trigger of trigger type liquid ejector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To urge a plunger forward through a trigger by protruding spring plates which bend vertically from an elastic semi-cylindrical holding plate in which a rear part is opened in a C-shape in a plane view forward in parallel in the plane view at proper intervals and molding the entire body with an elastic synthetic resin integrally. SOLUTION: Each base part 5a of a spring plate 5 is erected from both right and left sides of an elastic semicylindrical holding plate 3 in which a rear part is opened 2 in a C-shape in a plane view through a forward protruded rod part 4, and each intermediate part 5b of the plate 5 extending from both base parts 5a is formed in a pair of large curved parts 6 extending upper- forward. Moreover, each spring plate end 5c is protruded with an upper surface slightly curved in a recessed shape lower-forward from the ends of both curved parts 6, both spring plate ends 5c are connected by an interval holding plate 7, a pair of blocking plates 8 for trigger-blocking is protruded forward from the front of the plate 7, and the entire body is molded integrally with an elastic synthetic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

[0002]

2. Description of the Related Art In general, a liquid ejector of a trigger type erects a vertical cylinder from the upper part of a mounting cylinder to be fitted to a mouth and neck of a container body, an injection cylinder from an upper end of the vertical cylinder, and a cylinder from an intermediate part. The plunger front end, which is protruded forward into the cylinder and is fitted to the upper rear portion of the trigger, which protrudes forward and is vertically suspended from the front portion of the injection cylinder so as to be swingable in the front-rear direction, is locked. It is provided so that the liquid in the container is sucked into the cylinder by a moving operation and the liquid in the cylinder is ejected from the nozzle at the front end of the injection cylinder.

Conventionally, the forward bias of the plunger has been performed by a metal coil spring mounted in a cylinder.

[0004]

Recently, it is required to recycle waste as a resource as the amount of waste increases, but in general, an article is formed by combining a plurality of members made of different materials. Since such articles are difficult to disassemble for each material, it is difficult to reuse them as resources.

In the case of the above liquid ejector, the members other than the coil spring are formed of a synthetic resin material except for the balls of the ball valves used for the suction valve and the discharge valve, and both valves are valves other than the ball valves. It is known that the metal coil spring may be made of synthetic resin as it is. However, the elasticity is insufficient due to a remarkable difference in elasticity between metal and synthetic resin.

According to the present invention, a trigger and a plunger are connected and a plunger is urged forward via a trigger instead of a coil spring which is conventionally mounted in a cylinder and directly urges the plunger forward. A spring member made of a synthetic resin having substantially the same forward biasing force as that of the related art is obtained.

[0007]

As a first means, spring plates 5 and 5 which are bent up and down from an elastic semi-cylindrical holding plate 3 having a rear opening 2 in a C-shape in plan view are provided with an appropriate gap therebetween. And projecting forward almost in parallel in a plan view, and the whole was integrally formed of an elastic synthetic resin material.

As a second means, the above-mentioned first means is provided, and the elastic semi-cylindrical holding plate 3 is provided on both the left and right sides of the front wall portion.
Bases 5a, 5a of spring plates 5, 5 via forward projecting rods 4, 4
Are formed, and spring plate intermediate portions 5b, 5b extending from both base portions are formed in large curved portions 6, 6 extending upward and forward, and further downward from the leading ends of these large curved portions. , The upper surface is slightly curved in a concave shape to project the spring plate tips 5c, 5c,

The front ends of the two spring plates are connected by a spacing plate 7, and an engaging plate 8 for trigger engagement is projected forward from the front surface of the spacing plate 7.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 1 shows an entire spring member for biasing a trigger of a trigger type liquid ejector according to the present invention. As shown in FIG. 1, the spring member has a C-shape when viewed from a plane.
It has an elastic semi-cylindrical holding plate 3 having an opening 2 at the rear. As shown in FIG. 2, the semi-cylindrical holding plate is fitted on the outer surface of the front half of the vertical cylinder 35 between the cylinder 27 and the injection cylinder 26 of the trigger type liquid ejector. It is slightly shorter than the outer diameter of the vertical cylinder 35, that is, the opening is applied to the outer surface of the vertical cylinder,
The half-cylinder holding plate 3 is provided so as to be elastically deformed by directly pressing the half-cylinder holding plate 3 against the vertical tube 35 so as to be fitted to the outer surface of the front half of the vertical tube 35.

From the left and right sides of the front wall portion of the semi-cylindrical holding plate 3, the bases of the spring plates 5, 5 are interposed via forward projecting rods 4, 4.
5a, 5a are erected upward, and spring plate intermediate portions 5b, 5b extending from both base portions are formed into large curved portions 6, 6 extending upward and forward. From the tip to the lower front, bend slightly so that the upper surface becomes concave, and make the spring plate tips 5c, 5c
And the ends of the spring plates are connected by a spacing plate 7, and from the front surface of the spacing plate, an engagement plate 8 for trigger engagement is provided.
Projecting forward.

The spring plates 5 and 5 project forward substantially in parallel when viewed from above, and the gap between the spring plates is as shown in FIG.
As shown in FIG. 7, an injection cylinder 26 of a trigger type liquid ejector is provided between the large curved portions 6 and 6 so as to be freely inserted. In addition, the engagement plate 8
Are capable of being locked to the upper rear portion of the trigger 32. Side walls 32b and 32b projecting rearward from both left and right sides of the front wall 32a of the trigger.
It is possible to fit between 32b. In the illustrated example, two engaging plates 8 are formed so as to protrude in parallel from both left and right sides of the front surface of the spacing plate 7, but they may be formed as a single plate.

If the spring plates 5 and 5 have appropriate strength, the spacing plate and the engagement plate may be omitted, and the shape of the spring plate protruding from the semi-cylindrical holding plate may be changed as appropriate. .

FIG. 2 shows a trigger type liquid ejector to which the above-described spring member 1 is attached. The liquid ejector will be briefly described. Reference numeral 21 denotes a mounting cylinder which is screwed into and fitted to the neck of the container body, and 22 denotes an ejector main body mounting member which rises from the upper inner surface of the mounting cylinder. The inner vertical cylinder 23 to be fitted to the inner surface of the outer vertical cylinder is raised.

Reference numeral 24 denotes an ejector body. An injection cylinder 26 projects from the upper end of the outer vertical cylinder 25 fitted to the outer surface of the inner vertical cylinder, and a cylinder 27 projects forward from the lower part of the outer vertical cylinder. A nozzle head mounting cylinder 28 is fitted to the front of the injection cylinder 26, and a nozzle head 29 having a nozzle hole 30 is provided at the front of the mounting cylinder.
Are fitted. The nozzle head 29 has a member 31 with a cover plate for opening and closing the nozzle hole 30.

From the front part of the injection cylinder 26, a trigger 32 is hung downward and obliquely forward so as to swing freely in the front-rear direction, and a rear part is fitted into the cylinder at the upper rear part of the trigger. The front part of the plunger 33 projecting forward is pivotally connected.

A valve member 36 is mounted in a vertical cylinder 35 formed as an inner / outer double cylinder. The valve member is provided with a suction valve body 38 at the lower end of a leaf spring 37 having a bent portion continuous in a corrugated plate cross-sectional shape, and an engaging rod 39 standing upright from the upper end of the leaf spring. The discharge valve body 40 as an inverted skirt-like elastic cylinder is erected upward and outward through the body, and is integrally formed of a synthetic resin material. The suction valve body 38 has a lower surface provided on the lower inner surface of the vertical cylinder 35 for suction. The upper end of the engaging rod 39 is pressed against the valve seat 41 and the lower surface of the upper wall 42 closing the upper surface of the vertical cylinder.

In the spring member 1 of the present invention, the vertical cylinder 35 formed by the inner and outer vertical cylinders fits the elastic half-cylindrical holding plate 3 into the first half of the gap between the cylinder 27 and the injection cylinder 26. The spring plates 5 and 5 are protruded forward so as to be locked in the concave portions 43 of the rear opening provided on the upper rear surface of the trigger 32. In the illustrated example, the recess is formed by a trigger front wall 32a, side walls 32b, 32b protruding rearward from the left and right sides of the front wall, and upper and lower ribs 44, 44 provided between the side walls.

When the trigger 32 is pulled from the state shown in FIG.
The liquid that has entered the vertical cylinder 35 through 45 enters the injection cylinder 26 by elastically deforming the discharge valve body 40, and is ejected from the nozzle hole 30. When the trigger 32 is released, the spring 32, 5 restores the trigger 32 and the plunger 33 to their original positions. At this time, the high-pressure state is eliminated, and the elastic discharge valve body 40 moves the outer peripheral portion of the upper end to the inner surface of the vertical cylinder 35. Since the discharge valve is closed by pressing against the pressure, the inside of the cylinder 27 becomes negative pressure, and the suction valve body 38 closing the suction valve hole due to the negative pressure resists the elasticity of the intermediate spring plate. When pushed up, the liquid in the container enters the cylinder 27 through the suction pipe 46 to prepare for the next ejection of the liquid by the trigger pulling operation.

[0020]

According to the present invention, the spring member according to the first aspect has an elastic semi-cylindrical holding plate 3 having a rear opening 2 in a C-shape in plan view. The opening 2 is applied to the outer surface of the vertical cylinder 35 of the trigger type liquid ejector, and the half-cylindrical holding plate 3 is elastically deformed and fitted to the outer surface of the vertical cylinder 35 simply by pressing the half-cylindrical holding plate on the outer surface of the vertical cylinder 35 of the trigger type liquid ejector. The spring plates 5, 5 which are bent up and down from the semi-cylindrical holding plate 3 project forward substantially in parallel from the plane, with an appropriate gap therebetween, so that they are injected into the gap between the spring plates 5, 5. The front end of the spring plate can be locked into the concave portion 43 provided on the upper rear surface of the trigger 32 by loosely inserting the cylinder 26. Thus, regardless of whether the spring member 1 is formed of a synthetic resin material, the spring plate 5,5
The plunger 33 can be biased forward through the trigger 32 by increasing the length and elasticity of the plunger.

According to a second aspect of the present invention, there is provided the spring member according to the first aspect.
In addition to having the effect of the spring member described above, spring plate bases 5a, 5a are erected from the left and right sides of the front wall portion of the semi-cylindrical holding plate 3 via front protruding rods 4, 4. The spring plate middle portions 5b, 5b extending from both base portions are extended to the large curved portions 6, 6 extending upward and forward, and the upper surface is slightly curved from the large curved portion tip to form the spring plate tip portions 5c, 5c. Because of the protrusion, the spring plates 5, 5 are elastically deformed almost uniformly as a whole by the pulling of the trigger, and the elasticity capable of urging the plunger 33 forward through the trigger 32 is easily obtained. Further, since the front ends of the spring plates are connected by the spacing plate 7 and the engaging plate 8 for trigger engagement protrudes from the front surface of the spacing plate, the spring plates 5 and 5 are always elastically deformed at the same time. The elasticity can be increased and the spring member 1 can be easily mounted on the trigger type liquid ejector.

[Brief description of the drawings]

FIG. 1 is a perspective view of a spring member according to the present invention.

FIG. 2 is a sectional view of a trigger type liquid ejector using the spring member of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Spring member 3 ... Semi-cylindrical holding plate 5 ... Spring plate 6 ... Greatly curved part 24 ... Ejector body 32 ... Trigger 35 ... Vertical cylinder

Claims (2)

[Claims] A spring plate (5, 5) which is bent up and down from an elastic semi-cylindrical holding plate (3) having a rear opening (2) in a C-shape in plan view.
A trigger-biasing spring member for a trigger-type liquid ejector, wherein the spring member protrudes forward in a substantially parallel manner in a plan view with an appropriate gap therebetween and is integrally formed of a synthetic resin material having a high elasticity. 2. The bases of the spring plates 5, 5 from both left and right sides of the front wall portion of the elastic semi-cylindrical holding plate 3 via the front projecting rods 4, 4.
5a, 5a are erected, and spring plate intermediate portions 5b, 5b extending from both base portions are formed into large curved portions 6, 6 extending upward and forward, and further from the ends of these large curved portions. In the downward and forward direction, the upper surface is slightly curved in a concave shape to project the spring plate tips 5c, 5c. Also, the front ends of both spring plates are connected by the spacing plate 7, and the trigger engagement from the front of the spacing plate 7 is performed. Engagement plate 8
2. The spring member for biasing the trigger of the trigger type liquid ejector according to claim 1, wherein the spring is projected forward.