JPH1157542A - Aerosol spray nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut off liquid sufficiently and to prevent liquid sagging in an aerosol device using compressed air. SOLUTION: This spray nozzle 10 has a nozzle 2 and a tip inserted in the front surface of a button 1, and between the tip and the button 1, a stop valve 20 having elastic restoring power is inserted. Above a center line A-A, an on- setting state prevails, and below the center line A-A, an on-jetting state prevails. The stop valve 20 consists of a central part 21, a closing projection part 22 fitted in a liquid passage 7, a first gap 23, a connecting part 24, a second gap 25, an outer peripheral part 26 and the like. When pressure in the on-jetting liquid passage 7 rises, the stop valve 20 is pushed to the left to be in a state below the center line A-A, allowing a gap 27 to be formed. Then, the liquid enters a nozzle inside 12 and is sprayed from a jetting hole 4 through a passage 8. When the jetting is finished, the stop valve 20 is instantaneously returned to the state above the center line A-A by its elasticity to cut off the liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerosol spray nozzle provided with a means for improving liquid leakage or preventing liquid dripping when injection is stopped.

[0002]

2. Description of the Related Art FIG. 4 is a side sectional view of a conventional aerosol spray nozzle, 1 is a button attached to the upper end of an aerosol can, 2 is a nozzle attached to a button 1, 3 is a chip in a nozzle 2, 4 Is an injection hole, and 5 is a nozzle stem fitting recess. The recess 5 is fitted to a nozzle stem projecting from the upper end of the aerosol can. 6 and 7 are liquid passages in the button 1 and 8 is a passage between the nozzle 2 and the chip 3.

When the button 1 is depressed and the nozzle stem is pushed down, the chemical liquid ejected from the nozzle enters the passage 8 through the liquid passages 6 and 7 and is sprayed from the injection hole 4. At this time, as shown in FIG. 5, a plurality of passages 8 from the outer periphery of the nozzle 2 toward the central injection hole are provided so that the liquid is swirled at the injection hole and sprayed onto the good holes. Are provided tangentially.

Recently, pollution problems have become serious, and gases that have been conveniently used, such as chlorofluorocarbons, have been recognized as environmentally harmful and their use has been banned, so that gases such as nitrogen are used as propellants instead of chlorofluorocarbons. It has become. One of the disadvantages of using such a gas that does not dissolve in the liquid (called compressed gas) as a propellant is that when the injection is stopped, the liquid is poor and the liquid dripping occurs. is there.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided an aerosol spray nozzle using a compressed gas as a propellant.
An aerosol spray nozzle characterized in that an on-off valve device utilizing elastic restoring force is provided between the spray nozzle and the spray nozzle.

[0006]

FIG. 1 is a side sectional view of a spray nozzle 10 to which an on-off valve 20 according to the first invention is mounted, and FIG. 2 is a plan view of the on-off valve 20. In the figure, 1 is a button, 2 is a nozzle, 3 is a chip, and 7 is a liquid passage in the button 1. 20 is the nozzle 2
This is an on-off valve inserted therein, formed of a plastic thin plate or the like, and having elasticity. In FIG. 1, a portion above the center line AA shows a non-injection state, and a portion below the center line AA shows a state at the time of injection.

Reference numeral 21 denotes a center portion of the on-off valve 20, and reference numeral 22 denotes a closing protruding portion, which is normally fitted into the liquid passage 7 and shuts off the liquid passage. 23 is a first cut, 24 is a connecting part, 2
Reference numeral 5 denotes a second cut, and reference numeral 26 denotes an outer peripheral portion. The outer peripheral portion 26 is sandwiched between the button 1 and the step portion 11 of the nozzle 2 to fix the on-off valve 20. The on-off valve has such a shape, and has an elastic restoring force at the central portion and the connection portion due to the presence of the cut.

When the button 1 is depressed and the liquid is ejected from the aerosol can, the opening / closing valve 20 is in a state below the central portion AA in FIG. 1 by the pressure of the liquid in the liquid passage 7 and is bent leftward. The closing protruding portion 22 also moves to the left, the blockage of the liquid passage 7 is released, a gap 27 is formed as shown in the figure, and the chemical solution enters the nozzle interior 12 through the cuts 23 and 25 as shown by the arrow R. 8
Through the orifice 4.

When the injection is stopped and the pressure in the liquid passage 7 decreases, the on-off valve 20 instantaneously returns to the state shown above the center line AA due to elasticity, and the closing protrusion 22 causes the liquid to flow. Since the passage 7 is closed, there is no further supply of liquid, the spray from the injection hole 4 is also cut off, and the liquid is good and the liquid dripping can be prevented. FIG. 3 is a side sectional view of the spray nozzle 10 provided with the on-off valve 30 of the second invention, wherein 1 is a button, 2 is a nozzle,
3 is a chip, 4 is an injection hole, and 7 is a liquid passage in a button. Similarly, the on-off valve 30 is provided in the chip 3 in the invention shown in FIG. The on-off valve 30 has an outer peripheral portion 31,
It has a concave portion 32, a pressing surface 33 pressed against the wall surface of the button and blocking the liquid passage 7, and the like. Reference numeral 35 denotes a compression chamber provided with means for pressing the on-off valve 30 rightward in the figure and against the wall surface of the button 1. Or take appropriate measures.

The on-off valve 30 has a center line BB during non-injection.
Is pressed by the load means in the compression chamber 35 against the wall of the right button 1 to shut off the liquid passage 7. When the liquid is ejected from the aerosol can by depressing the button 1, the pressure in the liquid passage 7 causes the on-off valve 30 to move leftward against the load means in the compression chamber 35,
A gap 34 is formed between the button and the wall surface of the button 1, and the chemical enters the passage 8 via the liquid passage 7 and the gap 34 and reaches the injection hole 4.
(The state shown below the center line BB in FIG. 3) When the injection is stopped and the pressure in the liquid passage 7 decreases, the on-off valve 30 moves to the right by the load force of the spring in the compression chamber 35 or the air compression spring. And the pressing surface 33 is pressed against the wall surface of the button to instantaneously block the inflow of the chemical into the passage 8, so that the liquid in the injection hole 4 is good and the liquid dripping is prevented.

[0011]

As described above, the present invention has the above-mentioned structure, and it is possible to reliably improve liquid scum and prevent liquid dripping even in an aerosol apparatus using a compressed gas which does not dissolve in a chemical solution to be injected. .

[Brief description of the drawings]

FIG. 1 is a side sectional view of the first invention.

FIG. 2 is a plan view of the on-off valve according to the first invention;

FIG. 3 is a side sectional view of the second invention.

FIG. 4 is a side sectional view of a conventional spray nozzle.

FIG. 5 is an explanatory view around the injection hole

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Button 2 Nozzle 3 Tip 4 Injection hole 5 Nozzle stem fitting recess 6 Liquid passage 7 Liquid passage 8 Passage 9 Central part 10 Spray nozzle 11 Stepped part 12 Inside nozzle 20 Opening / closing valve 21 Central part 22 Protruding part 23 First Notch 24 Connecting part 25 Second cut 26 Outer peripheral part 27 Gap 28 Inside nozzle 30 On / off valve 31 Outer peripheral part 32 Recess 33 Pressing surface 34 Gap 35 Compression chamber

Claims (2)

[Claims] An aerosol spray nozzle characterized in that a plate-like opening / closing valve device having a restoring force by elasticity is interposed between a liquid passage in a button of an aerosol sprayer and the spray nozzle. 2. An aerosol spray nozzle, characterized in that an on-off valve device is provided inside a chip in the spray nozzle, utilizing an elastic restoring force by compression to shut off a liquid passage in the button when not spraying. Aerosol spray nozzle.