JPH11244748A - Trigger type liquid spraying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trigger type liquid spraying apparatus capable of preventing liquid leakage by reliably preventing trigger operation at the time of no use, convenient to be handled at the time of use, and having a simple structure. SOLUTION: This trigger type spraying apparatus comprises an installation cap 4 fitted in a port neck part 3 of a container, a pump main body 6 uprightly standing from the upper end of the cap and comprising a spraying cylinder 5 projected forward from the upper part, and a trigger 7 hung down from the front part of the spraying cylinder in such a manner that the trigger can be swung. An engaging member A covering a lower part of the trigger front face from both side faces of the pump main body and both side faces of the trigger is made rotatable from the upper side to the rear side and the rear part of the lower face is brought into contact with and engaged with the front part of the upper face of the installation cap, so that the engaging member A is made impossible to rotate further downward. Also, the inner face of the engaging member and the outer face of the pump main body are so constituted as to be engaged with each other at the time of rotation of the trigger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a trigger type liquid ejector.

[0002]

2. Description of the Related Art As a trigger type liquid ejector, for example,
The mounting cap fitted to the mouth and neck of the container body, and fitted and fixed above the cap, the cylinder is projected from the middle part of the vertical cylinder rising from the upper end of the mounting cap, and the injection cylinder is projected forward from the upper part. A pump body, a nozzle head fitted to the tip of the injection cylinder, and a tip end of a plunger vertically swingably suspended from the front part of the injection cylinder and fitted in the cylinder in a forward biased state. There is a known configuration that includes a trigger in which the liquid can be pushed into the container, and the operation of the trigger sucks up the liquid in the container body by the operation of the built-in pump mechanism and ejects the liquid from the outlet of the nozzle head.

[0003] In addition, in order to prevent liquid leakage due to careless operation of a trigger or mischief at the time of displaying products, a nozzle fitting tube provided at a front end of an injection tube is generally used. The head is rotatably provided, and the opening and closing mechanism is provided to shut off the communication of the liquid flow path by rotating the nozzle head between the two, and to communicate when returning to the original state.

[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 pulled frequently, the plunger can be slightly pushed in, and high-pressure liquid may accumulate in the front part of the injection cylinder downstream of the discharge valve through the discharge valve due to abnormally high pressure in the cylinder. When the nozzle head is turned to the liquid flow path communication position, the high-pressure liquid accumulated in the front part of the injection cylinder becomes
Even if the trigger operation is not performed, there is a problem that the nozzle head is ejected from the nozzle, or if the trigger is strongly pulled, the nozzle head may come off from the nozzle fitting cylinder due to a high pressure in the injection cylinder.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can reliably prevent a trigger operation when not in use, thereby solving the above-mentioned disadvantages. The present invention proposes an excellent trigger type liquid ejector having a simple structure.

[0006]

According to a first aspect of the present invention, there is provided an ejector according to the first aspect of the present invention. A pump body 6 having a cylinder 5 protruding forward;
A trigger 7 oscillated vertically from the front of the injection cylinder 5, and a trigger-type liquid ejector configured to suck up the liquid in the container body by the operation of the built-in pump mechanism by the operation of the trigger and to eject the liquid from the ejection port. In this case, a locking member A that covers the lower part of the front surface of the trigger from both side surfaces of the pump body via both side surfaces of the trigger is rotatably connected to the upper part of each rear end and the upper part of both sides of the pump body so as to move backward from above. Rotation is provided so that the lower rear part can be abutted and locked to the front part of the mounting cap to prevent further downward rotation. The trigger type liquid ejector is provided with a concave / convex engaging means for engaging the inner surface of the locking member and the outer surface of the pump body when they come into contact with the rear portion of the upper surface of the cap.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. The trigger type liquid ejector 1 of the present invention includes a mounting cap 4 fitted to the mouth and neck 3 of the container body 2.
A pump body 6 standing up from the upper end of the mounting cap and having the injection cylinder 5 protruding forward from the top, and a trigger 7 oscillatingly suspended from the front of the injection cylinder and operated by operating the trigger. It is provided with a known pump mechanism configured to suck up the liquid in the container body by the action of the built-in pump mechanism and to eject the liquid from the ejection port.

According to the present invention, in the above-described type of ejector, the trigger 7 is prevented from being carelessly retracted when not in use, and is brought into contact with the upper surface of the gripped hand during use to facilitate handling. A stop member A is provided.

The locking member A covers the lower part of the front of the trigger from both sides of the pump body 6 via both sides of the trigger 7,
Each rear end upper part is rotatably connected to the upper part of both sides of the pump body so as to be rotatable rearward from above, and
The lower rear portion is engaged with the front portion of the upper surface of the mounting cap 4 so as not to rotate further downward, so that the trigger cannot be pulled.

In the illustrated example, the locking member A comprises left and right side plates 8, 8 and a connecting plate 9 for connecting the respective side plates.
The upper corner portion of the rear end of the side plate 8 is rotatably connected to the outer surface of the pump body 6 by an appropriate means such as a pivotal connection or a shaft connection.

When the locking member A is rotated rearward and the upper portion of the front surface abuts against the rear portion of the upper surface of the mounting cap 4, engagement means for engaging the inner surface and the outer surface of the pump body with each other is provided. I have.

The engaging means may take various forms, but in the illustrated example, a vertically long semi-cylindrical concave portion 10 is provided at the lower portion on both sides of the pump body 6, and both upper portions of the inner surface of the locking member A are provided. At the front part, a horizontally long semi-cylindrical convex part 11 is protruded, and as shown in FIG. 3, the locking member A is rotated backward by about 270 °, and the front surface is abutted and locked on the upper surface of the mounting cap 4. In the state, the recess 10
Is configured to be engaged with.

Further, in the illustrated example, a vertically long semi-cylindrical convex portion 11a protrudes from a lower portion on both sides of the inner surface of the locking member A, so that the locking member A is in each recess 10 when the locking member A is in the forward rotation locking state. Is configured to be engaged with.

When not in use, as shown in FIGS. 1 and 2, the locking member A is rotated forward so that the trigger 7 cannot be retracted. In use, as shown in FIGS. 3 and 4, the locking member A is rotated backward, and the upper surface of the hand grasped from the outer periphery of the upper end of the container body to the outer periphery of the mounting cap is rotated. It is configured so as to be in contact with the lower surface of the member A to prevent displacement of the gripped container.

The other parts of the above embodiment will be described below. The mounting cap 4 is formed by extending a flange-shaped top plate 13 inward from the upper edge of the peripheral wall 12 screwed to the outer periphery of the container body neck portion 3.

The pump body 6 projects a cylinder 15 from an intermediate portion of a vertical cylinder 14 erected from the upper end of the mounting cap 4 and an injection cylinder 5 from an upper portion thereof. Further, a fitting tube 16 whose lower end is vertically protruded to the rear center eccentric position is extended to the lower end. In addition, a large-diameter cylinder part whose upper outer periphery is fitted to the inner peripheral surface of the fitting cylinder 16 and a small-diameter cylinder whose lower end projects to the rear eccentric position inside the large-diameter cylinder part by being fitted to the inner peripheral surface of the vertical cylinder 14. And a flange-like top plate extending from the upper edge of the large-diameter cylindrical portion, and the upper surface of the large-diameter cylindrical portion is brought into contact with the lower surface of the fitting cylinder so that the upper surface abuts the flange 17 outward. The mounting cap 4 is mounted on the pump body 6 so as to be rotatable and unable to come out by engaging the flange-shaped top plate 13 of the mounting cap on the flange 17, and via packing. Then, the flange 17 contacting the upper surface of the neck 3 of the container body is pressed and fixed by the flange-like top plate 13 of the mounting cap 4, so that the pump body 6 is
It is configured to be mounted and fixed on

The trigger 7 has side plates 20, 20 extending rearward from both sides of the front plate 19, respectively. The tip of a pressing rod 21 projecting from the upper rear surface of the front plate 19 is connected to the tip of a plunger described later. The plunger is configured to be able to be pushed in by being fitted into the recess.

A nozzle head 22 is connected to the tip of the injection cylinder 5 via a connecting member. The nozzle head 22 has a known opening / closing mechanism that can open and close the ejection port 23 by rotating in the left and right direction.

The outer peripheral edge of the rear portion is slidably fitted tightly to the inner surface of the cylinder 15, urged forward by a coil spring 24, and the distal end portion is protruded forward from the cylinder 15 so as to be pushed in. A plunger 25 is provided, and the front of the plunger is linked to the upper part of the trigger 7.

The upper end of the pipe 26 is fitted to the lower end opening of the small diameter cylindrical portion of the inner wall forming member 18, and the lower end is hung down in the lower part of the container. Further, the rear part of the plunger 25 is formed in a hollow cylindrical shape, and the auxiliary cylinder 27 is provided in a double cylindrical shape at the rear part inside the cylinder 15, and the inner surface of the plunger 25 is slidably fitted tightly on the outer surface of the auxiliary cylinder 27. I have. Further, communication holes 28 and 29 are respectively provided in the cylinder wall of the vertical cylinder 14 between the cylinder 15 and the auxiliary cylinder 27 and the cylinder wall of the vertical cylinder 14 at the base end of the injection cylinder 5. Then, a pipe is inserted between the container 2 and the vertical cylinder 14.
26, and a vertical cylinder through a communication hole 28.
14 and the inside of the cylinder 15, and further, the communication between the inside of the vertical cylinder 14 and the inside of the injection cylinder 5 through the communication hole 29, thus forming a liquid flow path from the inside of the container to the ejection port at the tip of the injection cylinder 5. doing. Further, a suction valve 30 is provided in a lower portion of the vertical cylinder 14 corresponding to the upstream of the cylinder 15, and a vertical cylinder 14 corresponding to the downstream of the cylinder 15 is provided.
A discharge valve 31 is provided in the upper part of the inside. Further, an outside air introduction passage a is provided at one end of the sliding portion of the plunger 25 of the cylinder 15 and opens above the neck of the container body at the other end.

In the case of using the ejector constructed as described above, when the trigger 7 is pulled forward, the plunger 25 moves backward, the liquid in the cylinder 15 is pressurized, and the discharge valve 31 is opened. It is ejected from the ejection port 23 at the tip through the injection cylinder 5. Next, when the pressing of the trigger 7 is released,
The plunger 25 moves forward due to the elastic restoring force of the coil spring 24, and the trigger 7 is pushed back to the original state and thereby returns. At this time, the pressure in the cylinder 15 becomes negative because the plunger 25 moves forward, the discharge valve 31 is closed, the suction valve 30 is opened, and the liquid in the container 2 is transferred to the cylinder via the pipe.
Introduce into 15. Further, at this time, outside air is introduced into the container body, which becomes negative pressure as the liquid decreases, through the outside air introduction path a.

In the drawing, reference numeral 32 denotes a cover which forms a part of the pump body 6 and is integrally formed. Further, each of the above members can be formed mainly using a synthetic resin, and can be formed by using an elastomer, a metal, or the like in combination as needed.

[0023]

As described above, the ejector according to the present invention has the above-described structure. In particular, the locking member A which covers the lower part of the front surface of the trigger from both side surfaces of the pump body via both side surfaces of the trigger is provided at each rear end. The upper part is rotatably connected to the upper part on both sides of the pump body so as to be rotatable from the upper part to the rear part, and the lower part rear part is respectively engaged with the front part of the upper surface of the mounting cap so as to be locked downward. To make the rotation impossible, and
When the upper surface of the front cap comes into contact with the rear part of the upper surface of the mounting cap by rotating backward, the inner surface of the locking member and the outer surface of the pump body are provided with concave and convex engaging means. The member can reliably prevent the trigger from being pulled in, preventing inadvertent leakage of the liquid.
Since the locking member is rotated and locked behind the pump body,
The hand holding the container abuts against the lower surface of the locking member, and the handling of the container is extremely convenient without causing any inconvenience such as displacement.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of the embodiment.

FIG. 3 is a vertical cross-sectional view showing a state where the locking member of the embodiment is rotated rearward.

FIG. 4 is a perspective view showing a state in which the locking member of the embodiment is rotated rearward.

FIG. 5 is an explanatory diagram of the embodiment.

[Explanation of symbols]

2 ... container body, 3 ... mouth and neck, 4 ... mounting cap, 5 ... injection cylinder, 6 ... pump body, 7 ... trigger, A ... locking member

Claims (1)

[Claims] 1. A mounting cap 4 fitted to the mouth and neck of a container body.
A pump body 6 standing up from the upper end of the mounting cap and projecting the injection cylinder 5 forward from the top, and a trigger 7 oscillatingly suspended from the front of the injection cylinder 5 to operate the trigger. In the trigger-type liquid ejector configured so that the liquid in the container is sucked up by the action of the built-in pump mechanism and ejected from the ejection port, the lower side of the trigger is locked from both sides of the pump body via the both sides of the trigger. The upper end of each member A is rotatably connected to the upper portion on both sides of the pump body so as to be rotatable rearward from above, and the lower portion rear portion is respectively abutted and locked to the front portion of the upper surface of the mounting cap. The inner surface of the locking member and the outer surface of the pump body are engaged with each other when the upper part of the front surface abuts against the rear part of the upper surface of the mounting cap. Concavo-convex engaging means Trigger type liquid sprayer, characterized by comprising providing.