JP2001334183A - Accumulator sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize an accumulator sprayer. SOLUTION: The accumulator sprayer has a cylinder 4, into which a hollow stem 5 is inserted and which has a check valve 4b in a suction port of contents. A sucking/pressurizing structure for spraying the contents by sucking and pressurizing between the cylinder and the hollow stem is constituted of a valve 6a having a tip part in contact with the check valve, a piston 6b holding the valve not to fall out and to be movable, back and forth and engaged with the inside of the hollow stem, an elastic member 6c pressing the valve to the check valve and an elastic member 6d for closing the flow passage of the contents by pressing the valve with the hollow stem in the opposite direction to the valve to bring the piston into contact with the valve seat of the valve. A seal part formed from the piston and the valve seat of the valve is forcibly opened by arranging a slide part slidable back and forth together with the hollow stem in the cylinder while keeping a liquidtight state between the inside wall surface in the piston and bringing the tip part of the valve into contact with the check valve in a state that the hollow stem is pushed through.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure accumulating type atomizer, and aims at reducing the size of the atomizer.

[0002]

2. Description of the Related Art Heretofore, so-called aerosol-type atomizers, in which a dispersion medium is filled in a container together with a pressurized medium, have been frequently used. However, such atomizers increase the production cost and increase the dispersion medium content. The pressurized medium often remains even after all of the waste has been used up, and there is a risk of explosion during disposal.Therefore, when disposing of the container, it is necessary to pierce the container body and discharge the pressurized medium. In recent years, as a substitute for the aerosol type nebulizer, a pressure accumulating nebulizer that ejects the contents by repeatedly pressing and returning the spray head multiple times has been reviewed as a substitute for the aerosol type nebulizer. Is coming.

For example, Japanese Patent Publication No. 54-39693 is referred to as a prior art document regarding this type of atomizer.

[0004] The manual sprayer disclosed in the above publication does not require a pressurized medium like an aerosol type sprayer, so there is no danger of explosion or the like at the time of disposal. There is an advantage that no extra work is required.

[0005]

Incidentally, since such a sprayer is a combination of a plurality of constituent members,
Inevitably, the enlargement (lengthening, diameter increase) is inevitable. In addition, this type of sprayer has a problem that when the contents are taken into the cylinder, the outside air is sucked from the nozzle, so that the liquid runs out poorly. Further, the pressure at the time of pressurizing the contents is not constant, so that stable spraying cannot be performed. Has left the problem.

An object of the present invention is to propose a pressure accumulating type sprayer which can perform stable spraying with good drainage and can be reduced in size.

[0007]

According to the present invention, the contents are alternately opened and closed by repeatedly opening and closing the hollow stem at the opening portion of the container filled with the contents by repeating the pressing operation of the hollow stem and the subsequent returning operation. A pressure accumulating sprayer that sucks, pressurizes and sprays from a nozzle tip,
The pressure accumulating type sprayer includes a cylinder having a hollow stem slidably inserted in the axial direction thereof, and having a check valve at a suction port of the content, wherein the content is interposed between the cylinder and the hollow stem. A suction / pressurization mechanism for spraying by suction and pressurization is provided, and this suction / pressurization mechanism leaves a valve having a front end portion abutting on a check valve, and its front and rear ends around the valve. A piston fitted over the hollow stem by retaining the valve so that it can move forward and backward, and an elastic member that presses the retained retaining valve toward the check valve within its movable range;
The piston consists of an elastic member that presses the piston together with the hollow stem in the opposite direction to the valve to close the flow passage for the contents by bringing the piston into contact with the valve seat of the valve.The piston is liquid-tight between the cylinder and the inner wall surface. It has a sliding part that can reciprocate in the cylinder together with the hollow stem while maintaining the state, and when the hollow stem is pushed off, the valve tip comes into contact with the check valve, so that the piston and the valve seat of the valve A pressure accumulation type sprayer characterized in that a formed seal portion is forcibly opened.

[0008] Preferably, the elastic member comprises at least two springs.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A pressure accumulating type sprayer according to the present invention is composed of a cylinder having a suction port for sucking contents and a hollow stem, and a suction / pressurizing mechanism is provided between the cylinders and a hollow stem. The suction, pressurization and ejection are alternately performed, so that the contents can be ejected with a relatively small stroke. The shortening of the stroke not only contributes to the downsizing of the sprayer itself, but also reduces the suction of the outside air, so that the liquid is easily drained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to the drawings. FIG. 1 shows an example of the configuration of a pressure accumulating type sprayer according to the present invention. In the figure, reference numeral 1 denotes a container for filling contents, and reference numeral 2 denotes an opening provided in the container 1.

Reference numeral 3 denotes a mounting portion which is screwed to the opening portion 2 of the container 1 and reference numeral 4 denotes a cylinder which is fixed and held by the mounting portion 3 and is disposed in the opening portion 2 as desired. The cylinder 4 has a check valve 4b disposed at a suction port 4a for contents, and a pipe P for sucking up the contents is connected to the suction port 4a.

Numeral 5 is a hollow stem which forms a passage for spraying the contents. The hollow stem 5 is slidably inserted along the axial direction of the cylinder 4.

Reference numeral 6 denotes a suction / pressurization mechanism provided between the cylinder 4 and the hollow stem 5. The suction / pressurization mechanism 6 is provided with a valve 6a having a front end in contact with the check valve 4b, and is covered around the valve 6a while leaving the front end and the rear end so that the valve 6a can move forward and backward. Piston 6b to be held and fitted inside hollow stem 5
And an elastic member 6c that presses the valve 6a toward the check valve 4b within its movable range, and presses the piston 6b together with the hollow stem 5 in the opposite direction to the valve 6a, and places the piston 6b on the valve seat b of the valve 6a. It comprises an elastic member (spring or the like) 6d that closes the flow passage m of the contents when brought into contact.

Reference numeral 7 denotes a sliding portion of the piston 6b. The sliding portion 7 can be formed integrally with the piston 6b, and maintains a liquid-tight state with the inner wall surface of the cylinder 4. It is possible to reciprocate in the cylinder 4 together with the hollow stem 5 while maintaining it.

Reference numeral 8 denotes a pressing head that covers the tip of the hollow stem 5, and 9 denotes a nozzle tip incorporated in the pressing head 8.

The sprayer shown in FIG. 1 shows an initial state before spraying the contents. The valve 6a is pressed downward by the elastic member 6c, and is connected to the piston 6b and the piston 6b. The hollow pipe 5 is pressed upward by the elastic member 6d, and in this state, the piston m is in close contact with the valve seat b of the valve 6a, and the passage m through which the contents pass is closed (the elastic member 6d is the elastic member 6c). The valve 6a and the piston 6b are in a balanced state by this. FIG. 2 shows a state in which the pressing head 8 is pushed in. In this state, the valve 6a is located at the lowest position together with the hollow stem 5, and the tip of the valve 6a is in contact with the check valve 4b.

When the pressing force is removed from the state shown in FIG. 2, the hollow stem 5 moves upward together with the valve 6a and the piston 6b by the restoring force of the elastic member 6d, and returns to the initial position shown in FIG. However, at this time, the cylinder chamber r
Since the inside becomes a negative pressure, the check valve 4b is opened, and the contents are sucked up through the pipe P into the cylinder chamber r.

When the pressing head 8 is pressed while the contents are present in the cylinder chamber r, the hollow stem 5 moves downward together with the piston 6b as shown in FIG. , Hollow stem 5, piston 6
With the movement of b, the piston 6b moves away from the valve seat of the valve 6a, and the flow passage m is opened.

When the flow passage m is opened, the contents being pressurized flow into the hollow stem 5 rapidly,
The contents are sprayed from the nozzle tip 9 in a state of being mixed with air, and the spraying continues until the tip of the piston 6b comes into contact with a step provided in the cylinder chamber r. When the tip of the piston 6b comes into contact with the step in the cylinder chamber r, the pushing of the pressing head 8, that is, the hollow stem 5 is forcibly terminated, thereby improving the drainage.

Here, this type of sprayer sprays the contents for the first time from the inside of the container. At the start of use, since air is present in the cylinder chamber r, it is discharged to suck the contents. It is important to repeatedly press the pressing head 8 several times to discharge the air in the cylinder, that is, to perform priming. For this priming, the pressing state of the pressing head 8 (hollow stem 5
When the valve 6a is in the cut-off state, the check valve 4
b, the seal portion formed by the piston 6b and the valve seat b of the valve 6a is forcibly opened. By continuously performing the series of steps shown in FIGS. It is forcibly discharged from the nozzle tip 9. Further, after the priming, the back suction function of sucking the contents remaining in the ejection flow path leading to the nozzle in the cylinder direction until the forcibly opened seal portion closes is exhibited. . The amount of the contents sucked into the cylinder chamber r from the nozzle direction by the back suction is determined by “valve opening stroke × cylinder sectional area”.

In the case of a conventional sprayer which is a combination of a small-diameter cylinder and a large-diameter cylinder as disclosed in Japanese Utility Model Publication No. 54-39693, it is indispensable to install a plurality of cylinders. In addition, the length and size of the container itself cannot be avoided, and the stroke during spraying is relatively large. Although it has been often found that the applied pressure is not stable, the sprayer according to the present invention is constituted by one cylinder, and the stroke for suction and pressurization is short, so that the sprayer itself can be made compact. is there. Further, when spraying the contents, the contents sucked into the cylinder chamber r of the cylinder are rapidly jetted when reaching a predetermined pressure, so that not only stable spraying is possible but also a back suction function. Liquid is good. Furthermore, since the mechanism for forcibly opening the seal portion is provided, the air in the cylinder chamber r at the time of priming can be reliably discharged.

FIG. 4 shows another configuration example of the sprayer according to the present invention. This example has a structure in which the shapes of the valve 6a, the hollow stem 5, and the piston 6b are changed, and a guide 10 surrounding the check valve 4b so as to be able to open and close is provided.

With such a structure, the size of the sprayer in the longitudinal direction can be shortened without affecting the stroke of the suction / pressurizing mechanism, so that the size of the sprayer can be further reduced, and the tip of the valve 6a can be checked. Since the guide 10 guides the valve 6a when it comes into contact with the valve 4b, there is an advantage that the shape deformation of the valve 6a at that portion can be prevented.

FIG. 5 shows another configuration example of the sprayer according to the present invention having a valve 6a having a Y-shaped cross section. The sprayer shown in FIG. 5 can not only shorten the length of the sprayer in the longitudinal direction without affecting the stroke of the suction / pressurization mechanism as in FIG.
By providing the valve 6a having a Y-shaped cross section, when the flow passage m of the content is opened and flows into the hollow stem 5, the mixing with air is promoted, so that the content is made finer and sprayed. can do.

[0025]

According to the present invention, a suction and pressurizing mechanism is provided between the hollow stem and the cylinder, and the contents are suctioned, pressurized and sprayed here, so that the sprayer itself is compact. Things.

Further, according to the present invention, since the seal portion is forcibly opened in a state where the pressing head is completely pushed, the air in the cylinder chamber can be reliably discharged by priming.

Furthermore, since the injection of the contents is started only when the pressure reaches a predetermined value, uniform injection becomes possible.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a configuration of a pressure accumulating sprayer according to the present invention.

FIG. 2 is an explanatory view of a spraying procedure of the sprayer shown in FIG.

FIG. 3 is an explanatory view of a spraying procedure of the sprayer shown in FIG.

FIG. 4 is a diagram showing another configuration example of the accumulator type sprayer according to the present invention.

FIG. 5 is a diagram showing another configuration example of the accumulator type sprayer according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Opening part 3 Mounting part 4 Cylinder 5 Hollow stem 6 Suction / pressing mechanism 7 Sliding part 8 Pressing head 9 Nozzle tip 10 Guide

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E014 PD12 PD13 PE04 PE06 PE20 PF04 3E084 AA04 AA12 AB01 BA02 DA01 DB12 FA09 FB01 GA01 GB01 GB12 GB14 LB02 LC01 LC06 LD22 LD26

Claims (2)

[Claims] Claims: 1. An opening portion of a container for filling contents,
A pressure accumulating sprayer that alternately sucks and pressurizes contents to spray from a nozzle tip by opening and closing a valve by repeating a pressing operation of a hollow stem and a subsequent returning operation, wherein the accumulating sprayer Has a cylinder in which a hollow stem is slidably inserted along its axial direction, and which has a check valve at a suction port for the content, and which sucks and applies the content between the cylinder and the hollow stem. A suction / pressurization mechanism for spraying by pressure is provided. The suction / pressurization mechanism includes a valve having a tip portion abutting on a check valve, and a valve covering the valve while leaving its tip and rear ends around the valve. The piston that fits inside the hollow stem while retaining it so that it can move forward and backward, and presses the retained valve against the check valve within its movable range. An elastic member and an elastic member that presses the piston together with the hollow stem in the opposite direction to the valve to contact the piston with the valve seat of the valve and close the flow passage of the contents, wherein the piston is in contact with the inner wall surface of the cylinder. It has a sliding part that can reciprocate in the cylinder together with the hollow stem while maintaining the liquid-tight state between the piston and the piston and the valve when the tip of the valve contacts the check valve when the hollow stem is pushed out. A pressure accumulating type sprayer characterized in that a seal portion formed by the valve seat is forcibly opened. 2. The accumulator according to claim 1, wherein the elastic member comprises at least two springs.