JPH10137642A - Sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized continuous sprayer not generating liquid dripping by stopping the sprayer in a moment when spraying is stopped and usable even indoors. SOLUTION: A liquid is sucked from a tank 4 by operating a trigger handle 5 to be temporarily stored in a pressure accumulation chamber 10. When the operation of the trigger handle 5 is further repeated, a wall surface 11 moves against a spring material 12 as the liquid introduced into the pressure accumulation chamber 10 becomes much to finally push out the liquid by the repulsive force of the spring material 12 to jet the liquid from a nozzle 14. When the operation of the trigger handle 5 is stopped, the upper surface corresponding to the projection part 19a of a seesaw button 19 is pushed to push a part 18a sending the liquid 3 to the nozzle 14 of a bubble element 18 and the part 18a is pressed and deformed to perfectly close the flow of the liquid 3 to stop the supply of the liquid to the nozzle 14. At the same time, the pressure storage chamber 10 is allowed to communicate with the third liquid passing pipe 17 being the passage to the tank to be reduced in pressure to cut off the pressure to the nozzle 14. Therefore, the liquid is not sprayed from the nozzle 14 to prevent liquid dripping in a moment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small and lightweight sprayer capable of continuously spraying various liquids such as water, detergent, disinfectant, insecticide, and paint by operating a trigger handle. The present invention relates to a sprayer that stops instantaneously when the liquid is dropped and the liquid does not drip from a nozzle.

[0002]

2. Description of the Related Art A conventional small atomizer is, for example, an aerosol type sprayer which mainly sprays an insecticide (JP-A-1-176467, JP-A-1-210057).
No.), spraying a chemical solution (J. 55-4063)
No.), spraying paints, etc.
No. 2) is known. In each of these cases, the liquid is sprayed only when the operating lever is operated, and when the operating lever returns to its original position, the liquid spraying stops and the liquid spraying is performed only intermittently.

[0003] As a small sprayer capable of continuous spraying, FIGS. 8 and 9 are known. FIG. 8 is mainly used for agriculture.
Reciprocate, pressurize air in the space K of the tank T, and spray the liquid at this pressure. When it is desired to stop spraying, the cock C is closed. However, since there is still pressure in the space K, even if liquid dripping occurs, it is not a problem since it is used on farmland. FIG. 9 shows a structure in which the piston P is reciprocated in the cylinder S in advance, the space K is compressed, and the nozzle N is pushed to spray. When the finger is removed from the nozzle N, the spraying stops instantaneously and only liquid is not generated, but there is a disadvantage that the operation time is short because the air is quickly lost.

Further, the trigger handle is operated to temporarily store the liquid against the spring material in the middle of the flow pipe from the tank to the nozzle, and when the liquid reaches a predetermined level or more, the air pressure and the spring material are reduced. A sprayer provided with a pressure accumulating chamber for sending a liquid to a nozzle with a repulsive force of a liquid is known. This accumulator-type sprayer is capable of continuous spraying and is inexpensive because it does not use gas. However, when the operation of the trigger-handle is stopped, the liquid remaining in the accumulator is sent to the nozzle, and the pressure is reduced. The liquid was dripped from the nozzle because of the decrease in the temperature, so that it could not be used indoors.

[0005]

SUMMARY OF THE INVENTION Accordingly, the applicant of the present invention first sucked air from the tank with a sprayer body, a tank, a trigger handle attached to the sprayer body, and a valve opened and closed by operating the trigger handle. In a sprayer comprising a liquid reservoir for temporarily storing a liquid and a nozzle for spraying the liquid supplied from the liquid reservoir, a liquid return pipe is provided between the liquid reservoir and the tank, and the liquid is returned. Japanese Patent Laid-Open No. 5-1040 proposes a device for preventing liquid dripping of a sprayer, which is provided with a pressure relief mechanism for instantly reducing the internal pressure of a liquid reservoir to zero.
No. 41). However, with this mechanism, there was a risk that the production would be difficult and expensive.

Accordingly, the present applicant further provides a shut-off mechanism for completely blocking the flow of liquid sent to the nozzle through the liquid passage tube when the operation of the trigger-handle is stopped, and instantaneously reduces the pressure in the accumulator. A nebulizer in which a decompression mechanism works simultaneously was invented (Japanese Patent Application No. 8-31315). According to the present invention, it is possible to provide a sprayer which can be manufactured at a low cost and does not drip from the nozzle at the moment when the operation of the handle is stopped and the continuous spraying is stopped. The present invention further improves the above patents,
An object of the present invention is to obtain a small-sized continuous sprayer without dripping, which has a simplified structure, a reduced number of parts, and is inexpensive.

[0007]

The nebulizer according to the present invention comprises:
The sprayer body, the tank, the trigger-handle, and the valve are opened and closed in conjunction with the operation of the trigger-handle, thereby sucking the liquid from the tank via the first liquid passage pipe, and opposing the spring material. A pressure accumulating chamber for temporarily storing the liquid, and a sprayer for sending the liquid in the pressure accumulating chamber to the nozzle through a second liquid pipe by the repulsive force of the spring material and the compressed air pressure when the liquid in the pressure accumulating chamber reaches a predetermined level or more. , A third liquid pipe for returning the liquid to the tank is provided in the middle of the second liquid pipe via a valve body;
The valve body is provided with a control function for shutting off the sending to the third liquid pipe when sending the liquid to the nozzle, and for sending the liquid to the nozzle when sending the liquid to the third liquid pipe. It is a thing.

Further, the control function of the valve body is, for example, to provide a shear button on the valve body, and the shutter button always sends the liquid to the nozzle of the bubble body or the third liquid pipe. The flow of the liquid is completely prevented by crushing and deforming one of the parts for sending the liquid.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a sprayer 1 according to the present invention.
It is placed on a tank 4 storing various liquids 3 such as detergents. A trigger handle 5 is rotatably mounted on the sprayer main body 2 by a rotation shaft 6.
The suction valve 7 and the discharge valve 8 are opened and closed in conjunction with the operation of the handle 5 to suck the liquid 3 from the tank 4 through the first liquid pipe 9 and send it to the pressure accumulating chamber 10 for temporarily storing the liquid. (See FIG. 2).

The pressure accumulating chamber 10 is provided with a wall surface 11 constituting the pressure accumulating chamber, and the wall surface 11 is always supported by a spring member 12 which is urged in a direction to reduce the volume of the pressure accumulating chamber 10. When the operation of the trigger handle 5 is repeated many times, the liquid 3 accumulates in a predetermined amount or more in the pressure accumulating chamber 10.
The liquid inside is supplied to the nozzle 14 through the second liquid passage 13 from the pressure accumulating chamber 10 to the nozzle, and is sprayed as shown in FIG.

The end of a piston 15 of the sprayer body 1 abuts against the trigger handle 5, and the piston 1
5 is always urged by a spring member 16 in a direction in which the trigger-handle 5 is separated from the sprayer body 2.

In the middle of the second liquid passage 13, the tank 4
A third liquid pipe 17 for returning the liquid 3 to the valve 3 is provided via a valve body 18. The bubble 18 is used to transfer the liquid 3 to the nozzle 14
When sending the liquid 3 to the third liquid pipe 17, a control function is provided to shut off the liquid to the nozzle 14 when sending the liquid 3 to the third liquid pipe 17. The control function of the valve body 18 may be any type as long as it is a structure that opens and closes the liquid in the liquid passage pipe, such as closing with a valve, moving a plate to close the inside of the pipe, and narrowing the pipe itself. In the case of the drawing, a seesaw button 19 is provided on the upper part of the valve body 18 and the seesaw button 19 is provided.
The pair of projections 19a and 19b of the saw button 19 press and deform either the portion 18a for sending the liquid 3 to the nozzle 14 of the bubble 18 or the portion 18b for sending the liquid 3 to the third liquid passage 17 at all times. In this way, the flow of the liquid is completely prevented.

FIG. 4 and FIG. 5 are explanatory views. The seesaw button 19 swings around a shaft 21 via a spring member 20 and a pair of projections provided on the lower surface of the seesaw button 19. Part 19a
19b always presses and deforms one of the portion 18a for sending the liquid 3 to the nozzle 14 of the bubble body 18 and the portion 18b for sending the liquid 3 to the third passage pipe 17, and the deformed side has The structure is such that the liquid 3 does not flow. That is, in the case of FIG. 4, the protrusion 19 b presses the portion 18 b of the bubble body 18 for sending the liquid 3 to the third liquid passage 17 to close it, while the protrusion 19 a sends the liquid 3 to the nozzle 14. Since the portion 18 a of the bubble body 18 is opened, the liquid 3 is sent from the accumulator 10 to the nozzle 14 via the second liquid passage 13.

Further, when the seesaw button 19 is swung about the shaft 21 as a fulcrum and the protruding portion 19a crushes and closes the portion 18a for sending the liquid 3 to the nozzle 14 as shown in FIG. Portion 18 for sending liquid 3 to third passage 17
When b opens, the liquid 3 returns to the tank 4. FIG.
FIG. 3 is an end view showing a positional relationship among the first liquid passage 9, the pressure accumulation chamber 10, the second liquid passage 13, and the third liquid passage 17.

Next, the operation of the above embodiment will be described.
When the trigger handle 5 is rotated about the shaft 6, the piston 15 is pushed against the spring 16. Next, when the operating force of the trigger-handle 5 is released, the piston 15 is pushed out by the spring 16. Therefore, the inside of the first liquid passage pipe 9 in the sprayer main body 2 becomes negative pressure, and the suction valve 7 is opened to suck out the liquid 3 in the tank 4.

Then, when the trigger handle 5 is turned again to push the piston 15, the liquid 3 is opened into the discharge valve 9 and sent into the accumulator 10. This trigger handle 5
Is repeated several times, and as the amount of liquid 3 introduced into the pressure accumulating chamber 10 increases, the wall surface 11 moves against the spring material 12, and finally the pressure of the pressure accumulating chamber 10 is reduced by the valve 22 of the nozzle 14. The liquid 3 is ejected from the nozzle 14 when the pressure exceeds the value of pushing the valve 22 open against the spring 23. Thereafter, by continuously operating the trigger handle 5, if the liquid amount 3 drawn out by one operation of the handle 5 is made larger than the amount sprayed from the nozzle 14, the trigger handle 5 can be moved. When the air pressure is returned to the original state (returned in a short time because of the return by the spring 16), the air pressure in the pressure accumulating chamber 10 is lower than a predetermined value (nozzle 14).
Until the pressure of the valve 22 closes).

When the operation of the trigger handle 5 is stopped, the operation of the trigger handle 5 is stopped, and at the same time, as shown in FIG. The projection 19a crushes and deforms the portion 18a for sending the liquid 3 to the nozzle 14, completely blocking the flow of the liquid, and stopping the supply of the liquid 3 to the nozzle 14. At the same time, the protruding portion 19b is opened from the portion 18b for sending the liquid 3 to the third liquid passage 17 and is opened to communicate with the tank 4, so that the pressure in the pressure accumulating chamber 10 is reduced and the internal pressure instantaneously becomes zero. In addition to simply stopping the spray from the nozzle 14, dripping can be prevented. The liquid 3 remaining in the second liquid passage 13 returns to the tank 4 via the third liquid passage 17, so that there is no waste.

[0018]

As described above, in the sprayer provided with the storage chamber, when the operation of the trigger handle is stopped to stop the continuous spraying, either the portion for sending the liquid to the nozzle or the portion for returning to the tank. Since a valve body with a control function that always opens and closes one is provided, just by operating the bubble body, not only continuous spraying, but also not only stopping supply of liquid to the nozzle when spraying is stopped By causing the internal pressure of the accumulator to be instantaneously reduced to zero by communicating with the accumulator and the tank, the liquid remaining in the accumulator can be prevented from being sent to the nozzle and dripping from the nozzle. Further, a control button of the bubble body is provided with a shear button on the valve body, and the shear button is used for a part for constantly sending the liquid to the nozzle of the bubble body or a part for sending the liquid to the third liquid passage pipe. If one of them is pressed and deformed to completely prevent the flow of liquid, the operation is easy, and the structure is simpler and the number of parts is smaller than that of the conventional product. is there.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a sprayer according to the present invention.

FIG. 2 is a front view of a main part showing a structure in which liquid accumulates in the storage chamber.

FIG. 3 is an operation diagram showing a state of continuous spraying.

FIG. 4 is an enlarged cross-sectional view showing the operation of a shear button.

FIG. 5 is an enlarged cross-sectional view showing the operation of a shear button.

FIG. 6 is an end view of a main part.

FIG. 7 is an operation diagram showing that the continuous spraying is stopped and the liquid returns to the tank.

FIG. 8 is a sectional view showing an example of a conventional continuous sprayer.

FIG. 9 is a sectional view showing an example of a conventional continuous sprayer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nebulizer 2 Nebulizer main body 3 Liquid 4 Tank 5 Trigger handle 7.8 valve 9 First liquid pipe 10 Accumulation chamber 13 Second liquid pipe 14 Nozzle 17 Third liquid pipe 18 Bubbles 19 Sea button

Claims (2)

[Claims] A spring material is provided by sucking a liquid from the tank through a first liquid passage pipe by opening and closing a valve in conjunction with operation of the sprayer body, a tank, a trigger handle, and the trigger handle. A pressure accumulating chamber for temporarily storing the liquid against the pressure, and when the liquid in the pressure accumulating chamber reaches a predetermined level or more, the repulsive force of the spring material and the compressed air pressure cause the liquid in the pressure accumulating chamber to pass through the second passage pipe. In a sprayer for sending liquid to the nozzle through a valve, a third liquid pipe for returning the liquid to the tank is provided in the middle of the second liquid pipe via a valve body. A sprayer having a control function of shutting off sending to a liquid pipe and shutting off sending of liquid to a nozzle when sending liquid to a third liquid passing pipe. 2. A control function of the valve body, wherein a valve is provided on the valve body, and the button is provided to a portion for constantly sending liquid to a nozzle of the bubble or a third liquid pipe. 2. The sprayer according to claim 1, wherein one of the parts sending the liquid is pressed and deformed to completely prevent the flow of the liquid.