JPH1142449A - Trigger type liquid spouting pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trigger type liq. spouting pump with the plunger energized forward without using a metallic coiled spring, capable of being formed without greatly changing the shape of a pump of this kind and provided with the excellent returnability of the plunger. SOLUTION: A pair of elastic sheets 12 are projected forward from the upper and lower parts of the front of the annular base 11 fixed to the front end of a cylinder, and the tip of each elastic sheet is abutted on and detained by the upper part of a trigger 10 to constitute a synthetic-resin spring member A. Meanwhile, the front end of the plunger 9 is connected to the upper part of the trigger and made swingable along with the reciprocation of the trigger 10, and the plunger is energized forward by the spring member A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a trigger type liquid ejection pump.

[0002]

2. Description of the Related Art As a trigger-type liquid ejection pump, for example, a plunger which can be pushed into a cylinder is operated by operating a trigger which is vertically swingably provided in front of a cylinder to suck up liquid in a mounted container body. There is known a device which is configured so as to be ejected from an ejection port.
The forward biasing of the plunger in this type of conventional pump is generally performed by a metal coil spring interposed at the rear of the plunger in the cylinder.
That is, the plunger is constantly pressed forward by the coil spring, the plunger is retracted while compressing the coil spring by pulling the trigger and pushing the plunger, and when the trigger is released, the plunger is pushed back by the spring force of the spring. Make a back and forth movement as shown.

[0003]

Although the above-mentioned metal coil spring employs a good return function and a good liquid discharging function of the pump, it has recently been discarded. Under the circumstances of material processing, it is required to separate metals and plastics. In the conventional case, it is extremely difficult to separate the coil springs because they are generally fine and are sealed inside. Also, when assembling, these coil springs are inconvenient to handle because of their fineness.

Although it has been attempted to change the coil spring from metal to plastic in consideration of such circumstances, plastic is generally inferior in durability and elastic restoring force as compared with metal. . Therefore, in order to obtain the same restoring force as that of a metal-made one, the diameter and thickness of the pump must be increased, which greatly affects the shape or size of the entire pump, and is not realistic at present. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its portion can be formed of a material such as a synthetic resin which does not require a separation process without using a metal coil spring. The present invention proposes a trigger type liquid ejection pump which can be formed without largely changing the form of this type of pump and has excellent return capability of a plunger.

[0006]

In order to solve the above-mentioned problems, the pump according to the first aspect of the present invention is provided so as to be able to be pushed into the cylinder by operating a trigger 10 which is vertically swingably provided in front of the cylinder 6. In the trigger type liquid ejection pump configured to operate the plunger 9 to suck up the liquid in the mounted container body and to eject the liquid from the ejection port, a pair of the front ends of the annular base 11 fitted to the front end of the cylinder are respectively forwardly disposed. And a spring member A made of synthetic resin in which the distal end of each elastic plate is brought into contact with the upper portion of the trigger 10 and the front end of the plunger 9 is swung. The trigger type liquid jet pump is characterized in that it is connected to the upper part of the trigger between the elastic plates so as to be able to rotate in accordance with.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. According to the present invention, a trigger is provided which is configured so as to actuate a plunger provided to be able to be pushed into a cylinder by operating a trigger vertically swingably provided in front of a cylinder, to suck up liquid in a mounted container body and to eject the liquid from an ejection port. The present invention relates to improvement of a liquid jet pump.

As shown in FIG. 1, for example, as shown in FIG. 1, a mounting cap 4 fitted to the mouth and neck portion 3 of a container body 2 is fitted and fixed on the cap, and the pump 1 stands up from the upper end of the mounting cap. From the middle part of the vertical cylinder 5 to the cylinder 6
A pump body 8 having an injection cylinder 7 projecting forward from the upper end thereof, a plunger 9 provided so as to be able to be pushed in the cylinder in a forward biased state, and an upper end pivoted at the front of the injection cylinder. And a trigger 10 having a plunger front end linked to an upper portion thereof, which is configured to suck up liquid in the container body by the operation of the trigger and to eject the liquid from the front end of the injection cylinder 7.

The pump according to the present invention is different from the above-described pump in that a spring member A having a special configuration is provided, and the front end of the plunger 9 is rotatable in accordance with the swing of the trigger 10. To link the two,
The spring member A is configured to apply a forward biasing force of the plunger. The spring member A is made of a synthetic resin, and a pair of elastic plates 12 project from the upper and lower front surfaces of the annular base 11 fitted to the front end of the cylinder, respectively. Stopped.

In this embodiment, the outer peripheral tip of the cylinder 6
An outer cylinder 11a, which is prevented from coming off by mutual engagement of the ridges, is fitted, a flange 11b extending from the front edge of the outer cylinder 11a to the center of the cylinder is extended, and the cylinder is moved from the rear surface on the center side of the flange. An annular base 11 is formed by extending an inner cylinder 11c fitted to the inner peripheral tip. Also, each elastic plate 12
It is a horizontal plate that is long in the front-rear direction and protrudes forward from the top and bottom center of the front surface of the flange 11b, and protrudes so as to spread toward the front end, and is formed at a predetermined interval above the rear surface of the front plate of the trigger 10. In the horizontally elongated concave grooves a, a
The distal ends are inserted and locked.

The plunger 9 moves back and forth in the cylinder 6 to pressurize and depressurize the inside of the cylinder. In the present embodiment, a plunger 9b projects from the center of the front surface of the cylindrical portion 9a having a closed front end. An outer sliding portion 9c is formed on the outer periphery of the rear portion of the cylindrical portion, and an inner sliding portion 9d is formed on the inner periphery.The outer sliding portion is fitted to the front portion of the cylinder inner periphery, and the inner sliding portion is formed. Are slidably fitted closely around the outer periphery of a guide cylinder protruding from the center of the cylinder. The trigger 10 is for operating the plunger 9 when a pulling operation is performed. In the present embodiment, the upper end of the both side plates 13 is rotatable at both front portions of the injection cylinder 7. Also, the front plate 14 is bridged between the front edges of both side plates 13 except for the upper end. A locking plate 15 projects rearward from the upper edge of the front plate 14, and the upper surface of the locking plate 15 is brought into contact with the lower surface of the injection cylinder 7 so that the trigger 10 urged forward rotates further forward. Not configured.

The linkage between the trigger 10 and the plunger 9 in the present embodiment is such that the upper inner surfaces of both side plates 13 of the trigger 10 and both sides of the front portion of the rod 9b of the plunger 9 are pivotally connected to each other, and the protrusion of the pivotal connection is formed. For example, a concave portion is formed in an elliptical shape so that the plunger 9 can be slightly moved, and is connected so as to be rotatable in accordance with the swing of the trigger 10, so that the plunger 9 is pushed straight. When the trigger 10 is pulled backward, the plunger 9 is pushed in while each elastic plate 12 is elastically deformed. When the pressing of the trigger 10 is released, the trigger 10 is pushed back forward by the elastic restoring force of each elastic plate 12. As a result, the plunger 9 is also configured to be pulled back forward.

Here, other parts in this embodiment will be described. The lower end of the vertical cylinder 5 of the pump body 8 is configured as a large-diameter portion 5a, and the large-diameter portion 5a is shifted from the rear eccentric position.
The lower end is partially protruded into 5a, and the small diameter portion 5b extends upward. Further, inside the vertical cylinder 5, there is provided a connecting cylinder member 16 having upper and lower openings with outer surfaces fitted along a portion extending from the inner surface of the large diameter portion 5a to the upper end of the inner surface of the small diameter portion 5b. The upper surface of the flange 17 whose upper surface is in contact with the lower surface of the vertical cylinder and protrudes outward from the lower portion, is attached to the mounting cap 4.
The flange-shaped top wall is configured to be pressed and locked on the upper surface of the neck 3 of the container body.

A suction pipe 18 is fitted to the lower end of the small-diameter portion of the connecting cylinder member 16 in the vertical cylinder 5 and is suspended in the container. Further, a nozzle head 19 of a known configuration is fitted and fixed to the tip of the injection cylinder 7, and covers the vertical cylinder 5 and the injection cylinder 7 of the pump body 8 and a cover 20 is fitted.
Then, the inside of the container body 2 and the vertical cylinder 5 (the small diameter portion of the connecting cylinder member 16)
The inside is communicated through a pipe 18, the inside of the vertical cylinder 5 and the inside of the cylinder 6 are communicated through a communication hole b, and the inside of the vertical cylinder 5 and the inside of the injection cylinder 7 are further communicated through a communication hole c. Thus, a liquid flow path from the inside of the container body 2 to the ejection port of the nozzle head 19 is formed.

A suction valve 21 is provided in the lower portion of the small-diameter portion 5b (the small-diameter portion of the connecting cylinder member 16) of the vertical cylinder 5, and a discharge valve (not shown) is provided in a liquid flow path in the nozzle head 19. I have. Further, an outside air introduction passage that communicates the guide cylinder with the inside of the large-diameter portion of the connecting cylinder member 16 through the communication passage d and that opens one end into the cylinder and opens the other end into the large-diameter portion of the connecting cylinder member 16 e is provided. When using the above pump, for example, the trigger 10 is moved from the state shown in FIG.
When the plunger 9 is pulled toward the container body against the elastic force of the plunger, the plunger 9 is pushed in, the liquid in the cylinder 6 is pressurized, the discharge valve is opened, and the liquid in the cylinder 6 is discharged into the vertical cylinder 5 (the connecting cylinder member).
16) The gas passes through the injection cylinder 7 through the upper portion and is jetted from the jet port of the nozzle head 19. Next, when the pressing of the trigger 10 is released, the trigger 10 is pushed back to the original state by the elastic restoring force of each elastic plate 12, and the plunger 9 is pulled back accordingly, and the inside of the cylinder 6 becomes negative pressure. Close,
When the suction valve 21 is opened, the liquid in the container 2
Introduced into. Each of the above members is mainly formed of a synthetic resin, and an elastic material such as an elastomer may be used in combination as needed.

[0016]

As described above, the liquid ejection container of the present invention has the above-described structure, and in particular, projects a pair of elastic plates 12 forward from upper and lower surfaces of an annular base 11 fitted to the front end of a cylinder. And a spring member A made of synthetic resin in which the distal end of each elastic plate is abutted and locked on the upper part of the trigger 10, and the front end of the plunger 9 is connected to the trigger 10.
Since it is connected to the upper part of the trigger between the elastic plates so that it can rotate in accordance with the swing of the rocker, the metal coil spring conventionally used for applying the forward biasing force of the plunger is eliminated and its Since the portion can be formed of synthetic resin or the like, there is no need to separate metal and synthetic resin at the time of disposal, and this is an excellent pump suited to recent waste disposal situations.

Further, since the spring member used has a simple structure and a larger size than the coil spring, the assembling operation can be easily performed, the return ability of the plunger is excellent, and the cylinder around the plunger and the trigger are connected. Since it is located in between, it also has the advantage that the pump can be formed without significantly changing the shape and size of this type of conventional pump.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a liquid ejection pump of the present invention.

FIG. 2 is a perspective view showing a spring member in the embodiment.

[Explanation of symbols]

6 ... cylinder, 9 ... plunger, 10 ... trigger, 11 ... annular base, 12 ... elastic plate, A ... spring member

Claims (1)

[Claims] 1. A plunger 9 which can be pushed into a cylinder is actuated by operating a trigger 10 which is vertically swingably provided in front of a cylinder 6, thereby sucking up liquid in a mounted container and ejecting the liquid from a spout. In the trigger type liquid ejection pump configured as described above, a pair of elastic plates 12 are respectively provided forward from upper and lower sides of the front surface of the annular base 11 fitted to the front end of the cylinder.
And a spring member A made of synthetic resin in which the tip of each elastic plate abuts and locks on the upper part of the trigger 10 is provided.
A trigger type liquid ejection pump characterized in that the front end of the plunger 9 is connected to the upper part of the trigger between the elastic plates so that the front end of the plunger 9 can be rotated in accordance with the swing of the trigger 10.