JP2000005658A - Trigger-type liquid jetting pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple-structured, excellent trigger-type liquid jetting pump which is surely prevented from incorrect trigger operation when not used, is free of careless liquid leak, etc., and is conveniently handled when used. SOLUTION: A connecting protrusion 17 having its end kept in contact with and connected to the back side of a trigger D is installed so that it protrudes from the lower part of the front face of an annular base 16 fit rotatably to the front end of a cylinder 4; an elastic plate 18 which is elastically deformed by the rotation of the annular base 16 is installed so that it extends upwardly from one side of the annular base 16, and the end of the plate 18 is connected to a pump body; a connecting member E having a lever protruded outwardly from the other side of the annular base 16 is installed; and thus, when the annular base 16 is rotated against the resilient power of the elastic plate 18 by pushing the lever, the contanct and connection between the connecting protrusion 17 and the trigger come off.

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 mounting cap fitted to the mouth and neck of a container body, and a cylinder fitted and fixed above the cap and from the middle of a vertical cylinder rising from the upper end of the mounting cap, are used. A pump body protruding forward from each of the injection cylinders from above,
The nozzle cap fitted to the tip of the injection cylinder is vertically oscillatably suspended from the front position of the injection cylinder, and the tip of the plunger fitted in the cylinder in a forward biased state is pushably connected. It is known that a trigger is provided, and the operation of the trigger causes the liquid in the container to be sucked up by the operation of the built-in pump mechanism and ejected from the ejection hole of the nozzle cap (for example, Japanese Utility Model Laid-Open No. 6-31854).
issue).

In general, in order to prevent leakage of liquid due to careless operation of a trigger or mischief during display of goods, the nozzle cap is provided rotatably. By turning the cap on the cap fitting portion, the communication of the liquid flow path is cut off, and an opening / closing mechanism is provided for communicating when returning to the original state (for example, Japanese Utility Model Application Laid-Open No. 62-187665).

[0004]

However, even in the apparatus provided with the opening / closing mechanism described above, the trigger is locked by the hydraulic pressure through the plunger so that the trigger cannot be pushed in. When the trigger is frequently pulled, the plunger can be slightly pushed in, and when the pressure inside the cylinder becomes abnormally high, the high-pressure liquid may accumulate in the front portion of the injection cylinder downstream of the discharge valve through the discharge valve. In such a case, when the nozzle cap is turned to the liquid flow path communication position, the high-pressure liquid accumulated in the front part of the injection cylinder may inconvenience to be ejected from the nozzle hole without performing the trigger operation, or If the trigger is pulled strongly, there is a risk that the nozzle cap may come off due to the high pressure in the injection cylinder.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to reliably prevent an erroneous trigger operation when not in use and to solve the above inconvenience. The present invention proposes an excellent trigger type liquid ejection pump having a simple structure.

[0006]

In order to solve the above-mentioned problems, a pump according to the present invention comprises a mounting cap B fitted to the mouth and neck portion 2 of a container body A, and a vertical cylinder 3 rising from the upper end of the mounting cap. A pump body C that projects the cylinder 4 from the middle part and the injection cylinder 5 from the upper part forward,
A trigger D vertically swingable from the front position of the injection cylinder so as to be swingable in a forward biased state, wherein the operation of the trigger sucks up the liquid in the container body by the action of the built-in pump mechanism and ejects the liquid from the tip end of the injection cylinder. In the above-described trigger type liquid ejection pump, a locking projection 17 having a distal end abuttingly engaged with the rear surface of the trigger D is protruded from a lower portion of the front surface of the annular base 16 rotatably fitted to the front end portion of the cylinder 4. At the same time, an elastic plate 18, which is elastically deformed with the rotation of the annular base, extends upward from one side of the annular base 16 so that its distal end is locked to the pump body, and the other side of the annular base is A locking member E having a lever 19 projecting outward is provided. When the annular base 16 is rotated against the elastic force of the elastic plate 18 by pressing the lever, the locking projection 17 is provided.
The trigger type liquid ejection pump is characterized in that it is configured such that the contact engagement with the trigger D is released.

Further, in the pump according to the second aspect of the present invention, the elastic plate has a meandering plate shape extending upward with one end integrally fixed to one side of the front surface of the annular base portion, and the upper end is provided with an upper pump. The trigger type liquid ejection pump according to claim 1, which is an elastic plate 18 fitted and locked to the main body.

The pump according to the third aspect of the present invention provides the pump
A nozzle cap F having a liquid ejection hole is rotatably fitted to the front end portion, and the ejection cylinder hole and the liquid ejection hole of the injection cylinder are communicated with the fitting portion by rotating the nozzle cap with respect to the injection cylinder. A trigger-type liquid ejection pump according to claim 1 is provided with a liquid passage opening / closing mechanism that can be freely opened and closed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The trigger type liquid jet pump 1 of the present invention includes a mounting cap B fitted to the mouth and neck 2 of a container body A, a cylinder 4 from an intermediate portion of a vertical cylinder 3 rising from an upper end of the mounting cap, and an injection cylinder from an upper portion thereof. 5 is provided with a pump body C protruding forward, and a trigger D vertically oscillatingly suspended from a front position of the injection cylinder so as to be urged forward. It is provided with a known pump mechanism configured to suck up the liquid and eject it from the tip of the injection cylinder.

An example of a built-in pump mechanism will be described with reference to an illustrated example. A pipe 6 having an upper end fitted to the lower end of a vertical cylinder 3 is hung down into a container body. And a suction valve 7 provided in a vertical cylinder upstream of the cylinder, a discharge valve 8 provided in a vertical cylinder downstream of the cylinder, and a plunger fitted in the cylinder in a forward biased state. Trigger D at the tip of 9
There is a configuration of linking to the upper part. However, the mechanism is not limited to this, and a mechanism employed in a conventional pump of this type can be employed.

The pump body C in the illustrated example includes a cover 10 integrally provided by covering both sides, the upper surface, and the rear surface of the vertical cylinder 3 and the injection cylinder and the cylinder 4. Bearing for pivoting the trigger on the upper part
11 are protruding.

Further, the trigger D in the illustrated example takes a form in which side plates 13 are respectively extended from both sides of the vertically long front plate 12, and the rear end of the plunger 9 is connected to the front end of the plunger 9 from the upper back surface of the front plate 12. A connecting rod 14 is protrudingly provided so as to abut and is connected thereto. A horizontal plate 15 serving also as a reinforcement is provided laterally below the connecting rod 14 so as to extend around the front plate 12 and both side plates 13. The upper end of each side plate 13 protrudes upward from the upper end edge of the front plate 12, and a rotating shaft projecting from both upper surfaces thereof is pivotally connected to the bearing 11.

According to the present invention, in the above-described ejection pump, a locking member E is fitted and fixed to the tip of the cylinder 4 in order to prevent the trigger D from being accidentally pulled in when not in use. .

The locking member E includes an annular base 16, a locking projection 17, an elastic plate 18, and a lever 19.

The annular base 16 is rotatably fitted to the front end of the cylinder 4. In the illustrated example, the annular base 16 has a donut shape having an outer peripheral edge having substantially the same diameter as the cylinder outer periphery. The provided fitting cylinder 20 is rotatably fitted to the tip of the inner surface of the cylinder 4, and the front part of the plunger 9 is projected into the inner cylinder 21 extending rearward from the peripheral edge of the central window hole.

The locking projection 17 protrudes forward from the lower part of the front surface of the annular base 16 and abuts its tip against the rear surface of the trigger D. The shape of the locking projection 17 can be variously selected depending on the shape of the trigger. Along with the rotation of the base 16, it is provided so as to be rotatable from a contact locking position to the rear surface of the trigger to a lock releasing position.

The locking projection 17 in the illustrated example projects forwardly from the lower left portion of the front surface of the annular base portion 16 and has a plate-like shape along the outer periphery of the base portion that forms a circular arc in a front view. The horizontal plate 15 is abutted and locked on the rear surface.

The elastic plate 18 is elastically deformed in accordance with the rotation of the annular base, extends upward from one side of the annular base 16, and is fixed at its tip to the pump body. Has a meandering plate shape extending upward from one side of the front surface of the annular base portion 16, and the upper end portion is configured to be fitted and locked to the lower surface of the bearing 11. The elastic plate is not limited to the meandering plate shape, but may be any other shape, such as a plate shape having a C shape in a front view, which can be elastically deformed as the annular base rotates.

The lever 19 projects outward from the side of the annular base 16. In consideration of the fact that an ordinary right-handed person often uses the projecting position of the lever 19, it is preferable that the lever 19 is protruded to the right side as viewed from the front, but is not limited to this. Of course, it is also possible to protrude. In that case, the projecting position of the elastic plate 18 is also changed to the opposite side.

When the annular base 16 is rotated against the elastic force of the elastic plate 18 by pressing the lever, the locking projection 17
Is released from contact with the trigger D so that the trigger can be retracted.

Further, in the present invention, the nozzle cap F having the liquid ejection hole 22 is rotatably fitted to the front end of the injection cylinder 5. Is provided with a liquid passage opening / closing mechanism that allows the injection cylinder hole and the liquid ejection hole of the above to communicate with each other and that can be shut off. As a specific structure of the opening / closing mechanism, a known mechanism used in a conventional pump of this type can be adopted.

When the pump 1 constructed as described above is not in use, as shown in FIG. 3, the locking projection 17 is abutted and locked on the trigger D so that the trigger D cannot be retracted. At this time, the nozzle cap F is set at a position where the injection cylinder hole and the liquid ejection hole are shut off, and the retraction of the trigger D is double locked. In use, after the nozzle cap F is rotated to make the injection cylinder hole communicate with the liquid ejection hole, as shown in FIG. 4, the lever 19 is depressed to rotate the annular base portion 16 and rotate accordingly. The moving locking projection 17 comes off the trigger D, and then the trigger D
, The liquid inside the mounted container is sucked up and ejected from the ejection hole 22. After use, lever 19
When the pressure is released, the elastic base 18 automatically
The pivot 16 rotates and the locking projection 17 abuts and locks on the rear surface of the trigger D. Each of the above members is mainly formed of a synthetic resin,
If necessary, it is formed by using an elastomer, a metal or the like in combination.

[0023]

As described above, according to the pump of the present invention, the locking projection having the front end abuttingly engaged with the rear surface of the trigger D from the lower front surface of the annular base 16 rotatably fitted to the front end of the cylinder 4. An elastic plate 18 elastically deformed by the rotation of the annular base extends upward from one side of the annular base 16 so that the distal end thereof is locked to the pump body, and the annular base is provided. A locking member E is provided by projecting a lever 19 outwardly from the other side portion, and when the annular base 16 is rotated against the elastic force of the elastic plate 18 by pressing the lever, Since the stop projection 17 is configured to be released from the abutment with the trigger D, when not in use, the trigger cannot be retracted unless the lever is pressed, and there is no risk of activating the trigger by mistake.
It is intended to prevent inadvertent leakage of liquid and mischief during display of goods.

In use, the trigger operation can be performed while the lever is being depressed with one hand.
The trigger can be pulled in by a simple operation of pressing the lever to rotate the annular base, and the liquid can be ejected.After use, the trigger cannot be pulled in automatically by releasing the lever. Therefore, the handling operation is extremely simple.

Further, in the pump according to the second aspect, since the elastic plate can linearly expand and contract with a limited narrow width, no space is required, and the operation of other members can be performed in a narrow space in front of the cylinder. It has the advantage that the liquid ejection operation can be performed smoothly without disturbing.

In the pump according to the third aspect, the trigger portion can be locked and double-locked, so that erroneous ejection of the liquid can be prevented more reliably.

[Brief description of the drawings]

FIG. 1 is a cutaway side view showing one embodiment of the present invention.

FIG. 2 is a perspective view showing a locking member of the embodiment.

FIG. 3 is an explanatory diagram for explaining the operation of the embodiment.

FIG. 4 is an explanatory diagram for explaining the operation of the embodiment.

FIG. 5 is a perspective view of the embodiment.

[Explanation of symbols]

A: container body, B: mounting cap, C: pump body, D ...
Trigger, E: locking member, F: nozzle cap, 2: mouth and neck, 3: vertical cylinder, 4: cylinder, 5: injection cylinder, 16: annular base, 17: locking projection, 18: elastic plate, 19 ... Lever, 22 ... Liquid ejection hole

Claims (3)

[Claims] 1. A mounting cap B fitted to the mouth and neck portion 2 of a container body A, a cylinder 4 protrudes forward from an intermediate portion of a vertical cylinder 3 erecting from an upper end of the mounting cap, and an injection cylinder 5 protrudes from an upper portion thereof. Pump body C, and a trigger D which is vertically swingably suspended from the front position of the injection cylinder in a forwardly biased state. In the trigger type liquid jet pump configured to jet from the front end, the front end of the annular base 16 rotatably fitted to the front end of the cylinder 4 is abutted and locked on the rear surface of the trigger D. Locking projection
An elastic plate 18 elastically deformed by the rotation of the annular base extends upward from one side of the annular base 16 so that the distal end thereof is locked to the pump body, and the annular base is provided. A locking member E is provided by projecting a lever 19 outwardly from the other side portion, and when the annular base 16 is rotated against the elastic force of the elastic plate 18 by pressing the lever, A trigger type liquid ejection pump characterized in that the stop projection 17 is configured to be released from contact with the trigger D. 2. The elastic plate 18 has a meandering plate shape extending upward with one end integrally fixed to one side of the front surface of the annular base 16, and the upper end is fitted and locked to the upper pump body. The trigger type liquid ejection pump according to claim 1, wherein the trigger type liquid ejection pump is an elastic plate. 3. A nozzle cap F having a liquid ejecting hole rotatably fitted to the front end of the injection cylinder 5, and these fitting portions are
2. A trigger type liquid ejection pump according to claim 1, further comprising: a liquid passage opening / closing mechanism capable of opening and closing a communication between the ejection tube hole and the liquid ejection hole of the ejection tube by rotating the nozzle cap with respect to the ejection tube. .