JPH0938537A - Sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the contents remaining near the tip end of a nozzle of a push button from dropping with the lapse of time after use of a sprayer. SOLUTION: While communicating with a pipeline 21a, transverse through holes 21b, 21c are formed in the diameter direction in a spraying pipe 21, and circumferential grooves are formed in the outer circumferences at the pisitions of the transverse holes 21b, 21c and at the same time a piston valve 22 is installed in the circumferential grooves in the manner they can slide up and down. A vacuum chamber 23 is formed between the spraying pipe 21 and the piston valve 22. The piston valve 22 is slid with a delay from the time when the spraying pipe 21 is pushed in to communicate the pipeline 21a and the cylinder chamber 28 and at the same time to narrow the vacuum chamber 23, and on the other hand the piston valve 22 is slid with a delay from the time when the spraying pipe 21 is turned back to shut off the communication of the pipeline 21a and the cylinder chamber 28 and at the same time to widen the vacuum chamber 23, so that a part of the contents remaining in the pipeline 21a can be sucked to the vacuum chamber 23 through the transverse hole 21b and the contents near the tip end of the nozzle 26b of a push button 26 can sucked farther.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to cosmetics, medicinal products, and medicinal products.
The present invention relates to an ejector for ejecting liquid, emulsion or the like contained in a container body for painting or the like from a nozzle of a push button into a small amount.

[0002]

2. Description of the Related Art Conventionally, for example, in a cosmetic ejector, as shown in FIG. 8, a push button 1 is attached to the upper end of an eject pipe 2 and the lower end of the eject pipe 2 is connected via a piston valve 3. It is inserted into the cylinder 4 and its piston valve 3
The pump P is configured by cutting off the communication between the inside and the ejection pipe 2.
There is one in which the pump P is attached to the mouth portion 6a of the container body 6.

During use, the push button 1 is pushed down, the ejection pipe 2 is pushed into the cylinder 4 against the coil spring 7 to increase the pressure in the cylinder chamber 5, and the piston valve 3 is elastically deformed to open the valve. While ejecting the contents in the cylinder chamber 5 through the ejection pipe 2 from the tip of the nozzle 1a of the push button 1, when the hand is released from the push button 1 after the ejection, the elastic deformation of the piston valve 3 is eliminated. The valve is closed and the coil spring 7 pushes up the ejection pipe 2 so that the cylinder chamber 5
The inside of the container was made negative pressure, the check valve 8 was opened, and the contents in the container body 6 were sucked up into the cylinder chamber 5.

[0004]

However, in such a conventional ejector, the contents remaining in the vicinity of the tip of the nozzle 1a after use thereof gradually flow out with the passage of time and hang down from the tip of the nozzle 1a. There was a problem of getting dirty around it.

Therefore, an object of the present invention is to prevent the contents remaining in the vicinity of the nozzle tip from dropping from the nozzle tip over time after use in such an ejector.

[0006]

Therefore, according to the invention described in claim 1, as shown in the following embodiments, the push button 26 is pushed down to push the ejection pipe 21 into the cylinder 12, and the ejection pipe 21 Piston valve 22
Slides to communicate between the pipe passage 21a in the ejection pipe 21 and the cylinder chamber 28, and narrows the vacuum chamber 23 formed between the ejection pipe 21 and the piston valve 22. When the hand is released, the piston valve 22 is slid after the return of the ejection pipe 21, the communication between the ejection pipe 21 and the cylinder chamber 28 is cut off, and the vacuum chamber 23 is expanded. , Is characterized.

The invention according to claim 2 is, as shown in the following illustrated embodiment, in the ejector according to claim 1,
When the hand is released from the push button 26, the cylinder chamber 2
It is characterized in that the amount of liquid sucked into the vacuum chamber 23 from the inside of the jet pipe 21 is larger than the amount of liquid entering from the jet pipe 21 into the jet pipe 21.

According to a third aspect of the present invention, there is provided an ejector according to the first aspect, as shown in the following illustrated embodiment,
After the communication between the inside of the ejection pipe 21 and the cylinder chamber 28 is cut off, the vacuum chamber 23 is further expanded.
It is characterized by the following.

According to a fourth aspect of the present invention, there is provided an ejector according to the first aspect, as shown in the following illustrated embodiment,
A sliding load for delaying the piston valve 22 when the jet pipe 21 is returned is applied to the piston valve 22, for example, by a convex portion 12j.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal cross-sectional view of a main part of a jetting machine for shampoo according to an embodiment of the present invention when not in use. FIG. 2 is an enlarged vertical sectional view of the vicinity of the piston valve.

Reference numeral 10 in the drawing denotes a container body. The container body 10 is made of a plastic material in the shape of a bottle, is provided with a screw on the outer periphery of the mouth 10a, and contains a shampoo liquid, which is the content (not shown), inside.

A pump P is attached to the mouth portion 10a of the container body 10. The pump P has a screw cap 1
1 is provided.

The screw cap 11 has a slightly short topped cylindrical shape, opens downward, and is provided with an internal thread on the inner circumference.
A central hole 11b is provided at the center of the top portion 11a. And
The inner surface of the top portion 11a is placed on the flange 12a of the cylinder 12 and is screwed to the mouth portion 10a of the container body 10.

The cylinder 12 has three step portions 1 in the middle thereof.
By providing 2b, 12c, and 12d, the diameter becomes smaller toward the lower side in the figure.

The upper part of the cylinder 12 has a first step 1
The flange 12a is provided on the outer periphery of 2b, and a lateral hole 12e is formed immediately above the second step portion 12c and radially extends therethrough.
And the upper end 12f is provided so as to project outward through the central hole 11b of the screw cap 12.

On the other hand, the lower end of the cylinder 12 has a third
Suction port 12g and pipe mounting port 12 inside step 12d position of
While h is continuously provided, a valve seat 12i having a gradually decreasing diameter is continuously provided immediately above the suction port 12g.
Then, the upper end portion of the suction pipe 13 is attached to the inside of the pipe mounting port 12h, and the inside of the pipe and the inside of the suction port 12g are communicated with each other.

A ball-shaped check valve 19 is placed in the cylinder 12 and placed on the valve seat 12i, and then a coil spring 20 is inserted and placed on the third step 12d. After that, the ejection pipe 21 having the piston valve 22 attached therein is placed in the cylinder 12.

The jet pipe 21 is rod-shaped, and has a pipe line 21a provided from the upper end to the middle of the downward direction at the center of the inside thereof. As can be seen clearly in FIG. 2, the jet pipe 21 communicates with the pipe line 21a and has a lateral hole 21b in the radial direction.・ Provide the horizontal holes 21 provided through the 21c at the top and bottom.
A circumferential groove 21d is provided on the outer periphery of the positions b and 21c. Of the lateral holes 21b and 21c, the lateral hole 21b is located on the upper side and the lateral hole 21c is located on the lower side.
The diameter of c is smaller than that of the upper lateral hole 21b.

On the other hand, the piston valve 22 has a cylindrical shape, and protrudes inward from the inner surface inside the intermediate portion to form an annular convex portion 2.
2a is provided. Then, the annular convex portion 22a is formed into the circumferential groove 2
It is put in 1d and attached slidably up and down, a vacuum chamber 23 is formed between the piston valve 22 and the ejection pipe 21, and the outer peripheral surface of the piston valve 22 is pressed against the inner peripheral surface of the cylinder 12. Become.

On the other hand, a fitting member 25 is provided on the upper end of the cylinder 12. The fitting member 25 has an outer cylindrical portion 25a.
And the inner cylindrical portion 25b are formed concentrically and integrally with each other.
Provide a female screw on the inner circumference of the upper part of. Then, the inner cylinder portion 25b is put into the cylinder 12, the lower end is abutted against the upper end of the piston valve 22, and the coil spring 20 is slightly compressed and provided through the ejection pipe 21, and the outer cylinder portion 25a is provided in the cylinder 12. The upper end portion 12f is covered and hooked.

Then, the ejection pipe 21 is pushed up by the urging force of the coil spring 20 and, as shown in FIG.
The lower step portion 21e of d is pressed against the lower surface 22b of the annular convex portion 22a to block the communication between the pipe passage 21a and the cylinder chamber 28, and the vacuum chamber 23 is expanded.

A push-down button 26 is attached to the upper end of the ejection pipe 21 projecting to the outside through the inner cylindrical portion 25b. The push button 26 is provided with a nozzle 26b in a beak shape on the outer periphery of a cap-shaped outer shape portion 26a,
A threaded tubular portion 26c is provided in the center of the inside, and the male threaded tubular portion 2 is provided.
6c and the nozzle 26b are connected by a horizontally long tubular portion 26d, and a jet passage 26e extending from the end of the male screw tubular portion 26c to the tip of the nozzle 26b is formed inside. Then, the male screw cylinder portion 26
The upper end portion of the ejection pipe 21 is press-fitted into the inside of c, and the ejection passage 26
e is connected to the pipe 21a.

When the ejector is used, the push button 26 is pushed down against the coil spring 20 in the direction of arrow A in FIG. 1 to push the jet pipe 21 into the cylinder 12. Then, due to the frictional resistance with the inner surface of the cylinder 12, the piston valve 2
2, the ejection pipe 21 moves in the same position to narrow the vacuum chamber 23, and communicates the cylinder chamber 28 and the pipe passage 21a through the lateral hole 21c. Then, as shown in FIG. The upper step portion 21f of the circumferential groove 21d is brought into contact with the upper surface 22c of the annular convex portion 22a. Then, as the ejection pipe 21 is pushed in, the piston valve 22 is slid to increase the pressure in the cylinder chamber 28, the shampoo liquid in the cylinder chamber 28 is sent out into the pipe line 21a through the lateral hole 21c, and further through the ejection passage 26b, the nozzle 26b. Eject from the tip to the outside.

Thereafter, at the final pressing step shown in FIG. 4, when the pressing button 26 is released and the pressing is released, the coil spring 20 pushes up the ejection pipe 21 in the direction of arrow B in the drawing. Then, due to the frictional resistance with the inner surface of the cylinder 12, the piston valve 22 remains in the same position and the ejection pipe 21
Moves to block the conduit 21a with the inner surface of the annular convex portion 22a to block the communication between the conduit 21a and the cylinder chamber 28, and to expand the vacuum chamber 23. At that time, the pipeline 21
A part of the shampoo liquid in a is sucked into the vacuum chamber 23 through the lateral hole 21b, and at the same time, the shampoo liquid near the tip of the nozzle 26b is pulled inward. Then, as shown in FIG. 5, the lower step portion 21e of the circumferential groove 21d is brought into contact with the lower surface 22b of the annular convex portion 22a of the piston valve 22.

Then, when the piston valve 22 is slid together with the ejection pipe 21 to return to the state of FIG. 1, the inside of the cylinder chamber 28 is made negative pressure and the check valve 19 is opened to open the container body 1.
Cylinder chamber 28 from the suction port 12g
Suck up inside.

In addition, such an ejector pushes the push button 26 against the coil spring 20 in order to reduce the size during transportation.
1 is pushed down in the direction of arrow A in FIG. 1 to the end to push the ejection pipe 21 into the cylinder 12, and then the push button 26 is rotated to screw the screw tubular portion 26c onto the female screw in the inner tubular portion 25b. As shown in FIG. 7, the movement of the ejection pipe 21 is locked.

By the way, in the illustrated ejector, when the push button 26 is released, the piston valve 22 is slid after the return of the ejection pipe 21 and the communication between the pipe line 21a and the cylinder chamber 28 is cut off. The vacuum chamber 23 is expanded. At that time, in the invention described in claim 2, as shown in FIG. 2, the lateral hole 21b that communicates between the pipe line 21a and the vacuum chamber 23 and the lateral hole 21c that communicates between the pipe line 21a and the cylinder chamber 28. By making it easier for the shampoo liquid formed in a larger diameter and remaining in the conduit 21a to enter the vacuum chamber 23, the amount of liquid entering the conduit 21a from the cylinder chamber 28 when the hand is released from the push button 26 Its pipeline 2
The amount of liquid sucked from 1a into the vacuum chamber 23 is increased.

According to the third aspect of the invention, when the push button 26 is released, the annular convex portion 2 of the piston valve 22 is released.
After the horizontal hole 21c is closed by the inner surface of 2a to block the communication between the conduit 21a and the cylinder chamber 28, the vacuum chamber 23 is further expanded. When the push button 26 is released, the amount of liquid sucked from the pipe 21a into the vacuum chamber 23 is larger than the amount of liquid entering the pipe 21a from the cylinder chamber 28.

In the illustrated ejector, the piston valve 22 is slid with a delay when the ejection pipe 21 is returned due to the frictional resistance between the piston valve 22 and the inner surface of the cylinder 12. However, the present invention is not limited to this, and in the invention according to claim 4, the sliding load that slides the piston valve 22 with a delay when the ejection pipe 21 is returned is, for example, as shown in FIG. It is configured to be provided by the convex portion 12j projecting to the side.

[0030]

As described above, according to the first aspect of the present invention, when the hand is released from the depressed push button, the piston valve slides behind the return of the ejection pipe and the ejection pipe and the cylinder chamber are delayed. Since the communication between the two is cut off and the vacuum chamber is expanded, part of the content remaining in the ejection pipe is sucked into the vacuum chamber, and at the same time, the content near the nozzle tip is drawn into the nozzle depth and the content is drawn from the nozzle tip. It is possible to prevent the object from dripping, and prevent the container and its surroundings from being contaminated with the dripping contents as in the conventional case.

According to the second aspect of the present invention, when the hand is released from the push button, the amount of liquid sucked into the vacuum chamber from the ejection pipe is made larger than the amount of liquid entering the ejection pipe from the cylinder chamber. Therefore, according to the invention described in claim 3, since the vacuum chamber is further expanded after the communication between the inside of the ejection pipe and the cylinder chamber is cut off, the contents in the ejection pipe are surely sucked, The effect of the invention described in 1) can be further enhanced.

According to the invention described in claim 4, since the piston valve slides with a certain delay when the jet pipe is returned,
The operation of the ejector can be ensured, and the effect of the invention according to claim 1 can be further enhanced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of an ejector according to an embodiment of the invention described in claim 1 when not in use.

FIG. 2 is an enlarged vertical sectional view around the piston valve.

FIG. 3 is an enlarged cross-sectional view of the vicinity of the piston valve in a state where the push button is pushed down when the ejector is used.

FIG. 4 is a vertical cross-sectional view of a main part of the ejector showing a final stage state of pressing down the push button.

FIG. 5 is an enlarged cross-sectional view of the vicinity of the piston valve showing a state in which the vacuum chamber is expanded when the hand is released from the push button.

FIG. 6 is a longitudinal cross-sectional view of a main part showing a state in which the ejection pipe is pushed in and locked during transportation of the ejection device.

FIG. 7 is an enlarged vertical cross-sectional view of the vicinity of the piston valve when the ejector according to the fourth embodiment of the present invention is used and the push button is released during use.

FIG. 8 is a vertical cross-sectional view of a main part of a conventional ejector when not in use.

[Explanation of symbols]

 12 cylinder 12j convex part 21 jet pipe 21a pipe line 22 piston valve 23 vacuum chamber 28 cylinder chamber

Claims (4)

[Claims] 1. A push-down button is pushed down to push an ejection pipe into a cylinder, and a piston valve is slid behind the pushing of the ejection pipe to communicate the inside of the ejection pipe with a cylinder chamber, and the ejection pipe and the piston. While narrowing the vacuum chamber formed with the valve, when the push button is released, the piston valve is slid after the return of the ejection pipe and the communication between the ejection pipe and the cylinder chamber is shut off. And an ejector formed by expanding the vacuum chamber. 2. The amount of the liquid sucked into the vacuum chamber from the ejection pipe is larger than the amount of the liquid entering the ejection pipe from the cylinder chamber when the push button is released. The ejector according to 1. 3. The ejector according to claim 1, wherein after the communication between the inside of the ejection pipe and the cylinder chamber is cut off, the vacuum chamber is further expanded. 4. The ejector according to claim 1, wherein the piston valve is provided with a slide load that causes the piston valve to slide with a delay when the ejection pipe returns.