JP2003012055A - Aerosol spray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol spray which can spray a neat mist by preventing liquid drips due to residual drips from splashing in subsequent spraying even if the residual drips occur after spraying. SOLUTION: The aerosol spray includes a storage container 1 for receiving a liquid to be sprayed, a nozzle 11 provided on the container 1, and a spray button 2 provided at a tip of the nozzle. The spray button 2 is pressed whereby the liquid in the container 1 dispersed from the nozzle 11 is sprayed through a dispersing path provided in the button 2 out of a spray hole 7. An eliminating means (h) for eliminating liquid drips of the sprayed liquid leaking from the hole 7 is provided at least on a lower part of the exterior of the hole 7. As the eliminating means (h), an absorbing portion for absorbing the sprayed liquid, a water-repellent portion having water-repellency to the liquid, a hydrophilic portion having a hydrophilic property for the sprayed liquid, or the like can be used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerosol injecting device, and more particularly to an improvement of an aerosol injecting device for injecting a liquid to be injected from a container by a gas pressure of an injection gas.

[0002]

2. Description of the Related Art The following is a general injection mechanism for an aerosol product which uses compressed gas or liquefied gas as an injection gas and injects the liquid to be injected from a container by the gas pressure of the injection gas. That is, a storage container and an injection button are provided, and a nozzle fitting hole for fitting the injection button to the tip of the nozzle of the storage container, an injection hole, and a communication hole between the nozzle fitting hole and the injection hole. And a discharge path for Then, by pressing the jet button fitted to the tip of the nozzle of the storage container downward, the liquid to be jetted in the storage container is jetted from the nozzle through the discharge path and from the jet hole. .

[0003]

A long-standing unsolved problem in this type of aerosol injection device is the problem of afterdraw. In this afterdraw, the liquid to be jetted that did not fly last after spraying remains as large droplets in the jet hole of the jet button, and stops pressing by pushing the jet button. In this case, it means the leakage of the liquid to be ejected from the ejection hole. When the afterdrawing is performed again when the jetting is performed, the droplets of the remaining afterdrawing are not atomized but fly as large particles. These large particles make the coated surface dirty after spraying, and when they come into contact with the skin, water droplets fly instead of fog, which causes discomfort, and depending on the conditions of the liquid to be sprayed and the gas to be sprayed, Due to the problem of this afterdraw, there are cases where it is necessary to give up commercialization. The problem of such afterdraw is that when compressed gas such as nitrogen, oxygen or carbon dioxide is used as the injection gas, or when liquefied gas is used and the amount of liquefied gas used is extremely small (for example, glass cleaner). It often occurs remarkably in products in which a pressure adjusting mechanism and a flow rate adjusting mechanism are incorporated in the injection button, but it is more or less in any aerosol product. The invention of the present application is good and clean by preventing droplets of the afterdraw that remain before being ejected into large particles even if the jetting is performed again after the afterdraw has occurred. It is intended to provide an aerosol injecting device capable of injecting various fog.

[0004]

The invention according to claim 1 of the present application is a storage container (1) for storing a liquid to be injected, and the storage container.
A container (1) provided with a nozzle (11) and an injection button (2) provided at the tip of the nozzle, and the storage container ejected from the nozzle (11) by pressing the injection button (2).
In the aerosol injection device in which the liquid to be injected in (1) is injected from the injection hole (7) through the discharge path provided in the injection button (2), at least below the outside of the injection hole (7), The above problem is solved by providing an aerosol ejecting apparatus characterized in that it is provided with an excluding means (h) for excluding the droplets of the liquid to be ejected that have leaked from the ejection hole (7). In the invention of claim 2 of the present application, the excluding means (h) is an injection hole.
(7) is an adsorption portion provided at least outside and below,
The aerosol device according to claim 1, wherein the adsorbing portion adsorbs the liquid to be ejected to eliminate the liquid droplets. The invention of claim 3 of the present application is
The excluding means (h) is a water-repellent portion provided at least below the outer side of the ejection hole (7), and the water-repellent portion has water repellency with respect to the liquid to be ejected to repel droplets. An aerosol device according to claim 1, characterized in that it is excluded. The invention of claim 4 of the present application is an elimination means.
(h) is a lyophilic part provided at least below the outside of the injection hole (7), and this lyophilic part has a lyophilic property with respect to the liquid to be injected, so that a droplet is dropped. An aerosol device according to claim 1, characterized in that it is excluded. According to the invention of claim 5 of the present application, the removing means is provided with at least the outer portion of the injection hole (7) at the lower portion of the capillary (k).
1, k2), wherein the liquid to be ejected is removed by the fine capillaries, and the aerosol device according to claim 1 is provided. In the invention of claim 6 of the present application, the excluding means is
A guide portion (a1, a2) that guides a droplet of the liquid to be ejected downward, and the liquid droplet is eliminated by guiding the liquid to be ejected downward by the guide portion. 1. An aerosol device according to 1. The invention of claim 7 of the present application is
The aerosol device according to claim 1, further comprising a liquid retaining section connected to the excluding means, wherein the liquid droplets eliminated by the excluding means are temporarily retained by the liquid retaining section.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the first aspect of the present invention.
FIG. 2 is a sectional view of an essential part of the aerosol injection device according to the embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part of an injection button of the aerosol injection device, and FIG. FIG. 3 is an enlarged cross-sectional view of a main part in a closed state.

The injection mechanism of the aerosol product of the present invention is
It is composed of a valve housing 13 having a nozzle 11 provided at the center of the upper end of the storage container 1, and an injection button 2 attached to the nozzle 11.

The nozzle 11 in this embodiment is lowered when the nozzle 11 is pressed downward, the liquid to be ejected is discharged from the nozzle hole 12, and the nozzle 1 is stopped when the pressing is stopped.
It is formed so as to be pushed up by an urging means such as a coil spring 16 attached to No. 1 to stop the delivery of the liquid to be injected.

The storage container 1 is the same as the conventional one, and contains medicines such as medicines, quasi-drugs, cosmetics, fragrances,
Air, carbon dioxide, nitrogen, laughing gas, oxygen, helium, DME, L along with various sprayed liquids such as insecticides and paints
A gas agent in a gas phase and / or a liquid phase is enclosed as a propellant gas such as PG and halogenated hydrocarbon. This storage container 1
A valve housing 13 is provided at the center of the upper end of the valve housing 13. The valve housing 13 is provided with a cylindrical nozzle 11 having a nozzle hole 12. A tubular connecting portion 14 is formed at the lower end of the valve housing 13, and a tube 15 is connected to the connecting portion 14. The liquid to be injected in the storage container 1 can be sent from the tube 15 through the connecting portion 14 to the nozzle holes 12 of the nozzle 11.

The nozzle 11 is formed of a cylindrical body having a bottom, and a communication hole 17 is formed at an appropriate position on the wall surface of the nozzle 11 between the lower end of the nozzle 11 and the inner bottom surface of the valve housing 13. When the coil spring 16 is interposed and the nozzle 11 is pressed downward, the nozzle hole 12 and the discharge passage 20 inside the valve housing 13 are communicated with each other through the communication hole 17, and thereby the tube 15 and the nozzle hole. It is configured to communicate with 12. Although not shown, a small hole called a vapor tap may be provided on the wall surface of the valve housing 13.

The ejection button 2 is composed of a main body portion 10, a regulator mechanism portion, and an ejection tip 70 having an ejection hole 7. A nozzle fitting hole 3 is formed in the lower center part of the body portion 10, and the nozzle 1 is fitted in the nozzle fitting hole 3.
Nozzle 11 can be pushed downward by pushing the injection button 2 downward with the tip of the nozzle 1 inserted.

The regulator mechanism portion includes a nozzle 1 in a substantially cylindrical space portion 4 formed in a central portion of the injection button 2.
1, a sliding member 5 arranged so as to be slidable in the axial direction (vertical direction in the drawing), and the sliding member 5 is always provided with a nozzle 11
An urging means 6 for urging (downward in the drawing) side. In this embodiment, a cylindrical coil spring is used as the biasing means 6. An upper lid 8 is arranged above the biasing means 6 while being fixed to the main body 10. The sliding member 5 is of a cylindrical shape having a partition portion 51 at the upper portion thereof, and the partition portion 51 serves as a partition wall. Further, the sliding member 5 has a protruding piece 54 extending downward from the center of the partition portion 51, and the shielding portion 52 is provided at the tip end of the protruding piece 54.

A nozzle opening 41 is formed above the nozzle fitting hole 3 provided in the lower center of the main body 10, and a storage chamber 44 is formed below the partition 51 of the sliding member 5. A connection hole 43 that connects the nozzle opening 41 and the storage chamber 44 is provided. In this embodiment, the connection hole 43 is formed on the nozzle opening 41, and
It is formed by making the inner diameter of the inner wall of the lower center portion of 0 smaller than the inner diameter of the nozzle opening portion 41. As a result, a step is formed at the boundary with the nozzle opening 41.

An annular groove is provided on the outer peripheral surface above the outer peripheral portion of the sliding member 5, and a ring-shaped sealing member 51a as a sealing means is provided in the groove. The storage chamber 4 formed between the sliding member 5 and the inner wall surface of the space 4 in this way
4, the sealing member 51a seals the space between the sliding member 5 and the inner wall surface of the space portion 4 so that the sealing member 51a is completely separated from the urging means arranging chamber 42 formed above the sealing member 51a. The injected liquid in the storage container 1 that has entered does not leak into the urging means disposition chamber 42, and the injection liquid sent out from the nozzle 11 of the storage container 1 at an appropriate pressure can be temporarily stored. A communication passage is provided between the storage chamber 45 and the ejection tip 70 to communicate the two.

The communication passage is formed of a narrow passage, and holds the liquid and gas to be injected well in the storage chamber 44 so that the internal pressure in the storage chamber 44 rises to a predetermined pressure. The liquid to be injected that has entered the storage chamber 44 at the predetermined internal pressure is sent to the injection tip 70. In this embodiment, the above effects are exhibited by forming the communication passages with a narrow gap between the sliding member 5 and the inner wall surface of the space 4.
A discharge path that communicates from the storage chamber 44 to the ejection tip 70 passes through the communication hole 73 and communicates with the ejection tip 70.

A protruding piece 54 provided under the sliding member 5
Is made of a round bar and has a shaft diameter smaller than that of the connection hole 43 formed between the nozzle opening 41 and the reservoir chamber 44, and the tip side penetrates the connection hole 43 to form a nozzle. It extends into the opening 41. The shielding portion 52 at the tip of the projecting piece 54 is formed with an outer peripheral diameter larger than the diameter of the connection hole 43, and is arranged in the nozzle opening portion 41. A shielding member 52a is provided on the shielding portion 52.
The shielding member 52a is composed of an O-ring for sealing having an elastic force, and is arranged by being wound around the projecting piece 54 at the upper portion of the shielding portion 52. Further, the outer peripheral diameter of the shielding member 52a is larger than the diameter of the connection hole 43 in a state of being wound around the projecting piece 54, so that the connection hole 43 can be sealed.

A cylindrical coil spring is used as the urging means 6 in this embodiment, and the partition 51 has its lower end in contact with the upper surface of the partition 51 of the sliding member 5 and its upper end in contact with the lower surface of the upper lid 8, respectively.
It is set between the upper lid 8 and the upper lid 8 and is disposed in the urging means arranging chamber 42. As shown in FIGS. 1 and 2, when the liquid to be ejected and the gas from the nozzle 11 are not fed into the storage chamber 44, the communication hole 73 is closed by the sealing member 51a when not in use. . Incidentally, the sealing member 51a
May be provided at a position where the communication hole 73 is opened, that is, a position slightly above the communication hole 73, instead of the position where the communication hole 73 is closed when not in use.

The injection hole 7 is, in this embodiment, a main body portion 1.
It is provided on the injection tip 70 which is separate from 0, and this injection tip 70 is attached to the portion of the communication hole 73 of the main body portion 10 of the injection button 2, but it can also be formed directly on the main body portion 10. . The ejection tip 70 includes a bottomed cylindrical outer tip 75 having the ejection hole 7 and the outer tip 7
5 and an inner chip 74 disposed inside the device 5, and a conduction path 71 is formed between the two. The conduction path 71 is formed by a narrow gap formed by a plurality of grooves formed on the inner peripheral surface of the outer chip 75 and the outer peripheral surface of the inner chip 74.

The liquid to be injected sent from the communication hole 73 is
It passes through the conduction path 71 and is ejected from the ejection hole 7 to the outside.
The ejection hole 7 is a small hole, and ejects the liquid to be ejected pushed out from the conduction path 71 in a spray form by the ejection hole 7.

Next, the operation of this injection mechanism will be described. First, the container 1 is inserted into the nozzle fitting hole 3 of the injection button 2.
The nozzle 11 is fitted and the injection button 2 is attached to the nozzle 11 of the storage container 1. In this attached state, as shown in FIGS. 1 and 2, the sliding member 5 is urged downward by the urging means 6, and the sealing member 51a on the outer peripheral portion of the sliding member 5 closes the communication hole 73. And the shield 52
Is located substantially in the center of the nozzle opening 41, and the connection hole 4
3 is open. Next, the upper surface of the injection button 2 is pressed downward with a finger. As a result, the nozzle 11 mounted in the nozzle fitting hole 3 is pushed downward, and along with this, the liquid to be injected inside the storage container 1 is jetted from the nozzle hole 12 by the pressure of the vaporized gas inside the storage container 1.

As shown in FIG. 3, the jetted liquid impinges on the lower surface of the shielding portion 52 and applies upward pressure W3, and at the same time, the outer periphery of the shielding portion 52 and the nozzle opening 4 are formed.
1 flows into the storage chamber 44 from the gap with the inner circumference through the connection hole 43 in an open state. When a certain amount of liquid to be injected and vaporized gas enter the storage chamber 44, the internal pressure W2 in the storage chamber 44 is increased by the liquid to be ejected pushed out by the vaporized gas.
Rises. In this way, the internal pressure W2 in the storage chamber 44 rises, and the internal pressure W2 applied to the sliding member 5 located above the storage chamber 44 and the pressure W3 applied to the lower surface of the shielding portion 52.
When the total pressure W2 + W3 becomes larger than the biasing force W1 that biases the sliding member 5 downward by the biasing means 6,
The sliding member 5 is pushed up.

When the sliding member 5 is pushed upward, the communication hole 73 is opened, and the liquid to be ejected passes through the conduction path 71 and is ejected from the ejection hole 7 to the outside. When this injection state is maintained and the internal pressure of the storage chamber 44 becomes equal to or higher than the predetermined internal pressure, that is, the urging pressure W1 of the urging means 6 as a cylindrical coil spring.
With the above, the sliding member 5 further rises. Sliding member 5
When is further pushed up, the shielding portion 52 closes the connection hole 43 from below and closes it. FIG. 3 depicts this state. Therefore, the liquid to be ejected is ejected from the ejection hole 7 at the internal pressure W2 in the storage chamber 44 without further increasing the internal pressure W2.

When the liquid to be jetted is jetted to some extent, the internal pressure W2 in the storage chamber 44 begins to gradually drop, and the total sum pressure W2 is reached.
+ W3 becomes smaller than the biasing force W1 of the biasing means 6. Then, the sliding member 5 descends downward. When the sliding member 5 descends, the feed of the liquid to be ejected and the vaporized gas to the ejection tip 70 is restricted, and the connection hole 43 is opened again. Then, again, the liquid to be injected enters the storage chamber 44, the total pressure W2 + W3 rises, the liquid to be injected in the storage chamber 44 is sent from the communication hole 73 to the injection tip 70, and the injection of the predetermined pressure is continued. . By repeating the above operation instantly, the liquid to be injected is constantly sprayed from the injection hole 7 at the internal pressure W2.

Therefore, from the beginning of use to the end of use, W is always available.
The liquid to be jetted can be sent out at a constant pressure of 2, and a constant jetting state and a spraying state can be maintained. Further, by using various biasing means 6 having different biasing forces,
The desired injection pressure can be easily adjusted as required.

In this embodiment, a cylindrical coil spring is used as the urging means 6, but the present invention is not limited to this.
Other biasing means may be used as appropriate. Further, as for the disposition position of the biasing means 6, the partition portion 51 of the sliding member 5 is also included.
Not only the upper surface of the nozzle opening 41 but also the upper surface of the shielding portion 52 and the step portion of the connection hole 43 in the nozzle opening 41, or the storage chamber 44, that is, the sliding member. It can be changed as appropriate, such as disposing a biasing means for pulling the partition 51 downward between the lower surface of the partition 51 and the inner wall of the space 4 of the main body 10.

The invention of the present application provides the above-mentioned jetting device with a liquid drop removing means for preventing deterioration of mist quality due to afterdrawing. The structure and operating state thereof will be described below. .

(Water-repellent portion) First, an example using a water-repellent portion as the excluding means will be described. The water-repellent portion is provided at least below the outer side of the ejection hole 7 and has water repellency with respect to the liquid to be ejected, so that the liquid droplet is repelled and eliminated. The water-repellent portion is formed by forming the member forming the injection hole 7, that is, the injection tip 70, with a water-repellent resin or by subjecting the surface to a water-repellent treatment. Examples of the water-repellent resin include resins having a low surface tension such as syrinco resin and fluororesin. As a result, the droplet does not stop in the vicinity of the ejection hole 7 but immediately drops downward. As a result, even if the next ejection is performed, the droplets drop to a position where they are not blown away by the jet flow, and it is possible to prevent the fog from being deteriorated by the remaining droplets as in the conventional case. The “water repellent” in the invention of the present application is, to be precise, a method of ejecting and removing a droplet, and it can be said that “liquid repellent” is more accurate, but the term of liquid repellent is not general. , "Water repellent". This water repellent portion can be implemented as a separate member for exclusion h, and can be provided, for example, below the injection hole 7 as in the example shown in FIGS. Also, FIG.
As shown in FIG. 3, an expulsion member formed of a resin having water repellency or having a water repellent surface is attached to the entire outer periphery of the injection hole 7 by adhesion or the like.
It may be provided.

The injection mechanism of the injection button shown in FIG. 4 is basically the same as the above-mentioned example of FIGS. 1 to 3, but the communication hole 73 is not opened / closed by the sealing member 51a. Is different. Instead, by setting this communication hole 73 (path from the storage chamber 44 to the conduction path 71 in the injection tip 70) as a bottleneck, the liquid to be injected is gradually ejected from the storage chamber 44 without flowing out at once. I am trying to do it. Therefore, by the same action as the previous example, the storage chamber 4
The liquid to be injected whose pressure is adjusted in 4 can be sprayed. In addition, in this example, the injection tip 70 is composed of only one member, and the conduction path 71 in the tip is formed into a straight tube shape,
Although it is assumed that the injection hole 7 is linearly formed, it may be implemented as the same as the previous example. Also, a small storage chamber may be provided in the injection tip 70.

As described above, the injection mechanism of the injection button is
A storage chamber is provided between the nozzle and the injection hole, and when the pressure in the storage chamber exceeds a predetermined pressure, the flow of the liquid and gas to be injected from the nozzle into the storage chamber is blocked, and when the pressure falls below the predetermined level. In addition to the one provided with a mechanism for permitting the same inflow, the invention can be implemented without such a mechanism. 5 and 6 do not have such a storage chamber (in other words, do not have a regulator mechanism), and a communication hole 73 is provided in the lateral direction from the vertical hole t fitted into the nozzle 3, and the injection tip 70 is provided. The connecting path 71 is connected to the injection hole 7. FIG. 5 is an example in which the injection tip 70 is configured as a so-called break-up injection mechanism by two members, and FIG. 6 is an example in which the same tip 70 is configured as a so-called straight injection mechanism. The means of exclusion is
Similar to the previous example, the injection tip 70 may be formed by forming a water-repellent resin or by subjecting the surface to a water-repellent treatment, or may be provided with a separate excluding member h. . In FIG. 5, the excluding member h is provided above and below the injection hole 7, and the lower part is set longer than the upper part. In FIG. 6, the ejection tip 70 is provided so as to project from the body of the ejection button 2, and an annular excluding member h is provided from the tip of the ejecting tip 70 to the body of the ejection button 2. As shown in FIG. 6, it is also preferable that the periphery of the injection hole 7 of the injection tip 70 and the excluding member h are formed flush with each other.

In each of these examples, when the separate excluding member h is provided, it is desirable that the separate excluding member h does not fall within the range of the injection pattern p from the injection hole. . Although the excluding member h is illustrated thick in the drawing, the excluding member h is ejected by making the excluding member h thin so as not to interfere with the ejection pattern p. It is desirable to provide the holes as close as possible to the holes. For example, when the radius of the injection hole 7 is 0.15 to 0.3 mm, the excluding member h is 0.25 to 0.25 mm from the center of the injection hole 7.
It is desirable to set them apart by about 1.8 mm. That is, it is desirable that the excluding member h is provided at a distance of about 0.1 to 1.5 mm from the outer diameter end of the injection hole 7. In other words, the excluding member h has a center of a radius of about 0.25 to 1.8 mm. Forming a hole,
An injection hole having a radius of about 0.15 to 0.3 mm is arranged in the center thereof. When the excluding member h has a large thickness, etc., a recess for accommodating the excluding member h is provided, and the excluding member h is provided in the recess so that the excluding member h is ejected by the ejection button 2 or the ejection tip 70. It is also desirable to be flush with the surface of.

(Suction part) Next, as another example of the excluding means,
An example in which a suction unit is provided will be shown. This adsorption part can be implemented as the excluding member h shown in FIGS. 1 to 6, and includes paper such as rough paper, Japanese paper, filter paper, absorbent paper, adsorptive foamed resin, lyophilic adsorption resin, or these resins. A member having an action of adsorbing the liquid to be ejected, such as the continuous foamed foam, is provided at least below the outer side of the ejection hole 7, and the liquid to be ejected is adsorbed to eliminate the droplets. That is, the droplets that have reached the adsorption unit are adsorbed and held by the adsorption unit and are not blown off by the jet flow. Therefore, it is possible to prevent the fog from being deteriorated due to the remaining droplets as in the conventional case.

(Lyophilic part) Next, as another example of the removing means,
An example of providing a lyophilic portion will be shown. This lyophilic part can be provided in the same form as the water repellent part, and is a highly lyophilic resin such as a sea surface active agent, a lyophilic resin, or a fluorine sea surface active agent, that is, a resin having a large lyophilic performance. The injection tip 70 is formed or the resin is coordinated as the excluding member h shown in FIGS. In this manner, the lyophilic portion is provided at least below the outer side of the ejection hole 7 and the liquid to be ejected is extended from the state of the liquid droplet into a thin film shape, thereby eliminating the liquid droplet. That is, the liquid droplets that have reached the lyophilic portion become a thin film by the lyophilic portion and disappear as droplets, and are not blown off by the jet flow. Therefore, it is possible to prevent the state of the fog to be ejected next time from being deteriorated due to the remaining droplets as in the conventional case.

(Capillary Part) Next, as another example of the removing means, an example in which a capillarity part is provided will be shown. This fine hair-like portion is formed around the injection hole 7 with a small bristle-like hair k1 (see FIG. 7),
The thin brush-shaped bristles k2 (see FIG. 8) are attached by an adhesive or integrally formed. As in the previous example, the position to be provided is around (especially below) the injection hole 7 and
0 and / or the injection button 2 is provided on the main body. The fine capillaries prevent the liquid to be ejected from stopping in the vicinity of the ejection hole 7 in the form of liquid droplets. In addition, by making the material of the fine capillaries have adsorptivity, water repellency, or lyophilicity, these effects can be more reliably exhibited and effective elimination can be achieved. You may make it perform a function.

(Guiding portion) Next, as still another example of the removing means, an example in which a guiding portion is provided will be shown. This guide portion is provided around the injection hole 7, particularly below, and is a guide portion that guides the liquid droplets of the liquid to be ejected downward. The guide portion a1 as shown in FIG. 9 and the guide portion a1 shown in FIG. It can be implemented in the form of a groove-shaped guide portion a2 as shown. Droplets are eliminated by guiding the liquid to be ejected downward by this guide portion. The guide portion is provided on the ejection tip 70 and / or the ejection button 2 main body. By making the guide part water-repellent and lyophilic, it is possible to more reliably exert these actions and to perform an effective exclusion function. Further, a concave portion a3 may be provided below the guide portions a1 and a2 as a liquid retaining portion so that the droplets dropped from the guide portion a3 can be temporarily stored. in addition,
A larger amount of droplets can be held by arranging an adsorbent for holding droplets around the recess 3a in a ring shape or by attaching an adsorbent having an appropriate size to an appropriate position of the recess 3a. Is desirable. That is, this makes it possible to retain droplets accumulated by a large number of jets, and even when continuously jetting a large number of jets, the effect of preventing mist deterioration due to afterdraw can be maintained.

[0034]

EXAMPLES Next, examples will be described together with comparative examples in order to enhance understanding of the present invention. Table 1 shows the results of the injection test of each example, and shows the test results for each type, form, and injection gas of the excluding means. The injection test is performed by pressing the injection button for 2 seconds, then stopping the injection for 1 second, then performing the injection for 2 seconds, repeating the injection for 2 seconds and the stop for 1 second. The state of fog was observed, the test was stopped when a large droplet flew in the fog, and the number of injections up to that point was recorded. The same test was performed three times for each example, the average value of the number of times that good injection was performed was obtained, and evaluated as follows.
It is shown in Table 1.

A: The average number of times is 10 or more B: Average number of times is 4 or more and less than 10 C ... The average number of times is 2 or more and less than 4 D: Average number is 1 or more and less than 2

In each of the examples and comparative examples, water which frequently and markedly produces afterdraw was used as the liquid to be injected, and nitrogen, carbon dioxide or LPG was used as the injection gas. As for the afterdraw state, compressed gas appears more frequently and more markedly in the propellant than in the case of liquefied gas. Therefore, in this test, more compressed gas (nitrogen, carbon dioxide) was used. Was used as a sample.
Nitrogen filled with 0.75Mpa and carbon dioxide with 0.6Mpa are used, and LPG is 0.4M under 25 degrees Celsius.
The thing of pa was filled with 20 volume% with respect to the total content. The diameter of the injection hole 7 was 0.5 mm. In Examples 1 to 4, the water repellent portion was formed by fluorine processing or silicon processing as the excluding means, and the forms thereof were those shown in FIGS. 2, 4, 5, and 6. Examples 5 to 8 are those in which the adsorption portion as the excluding means is formed by Japanese paper or absorbent paper, and Examples 9 to 12 are those in which the lyophilic portion as the excluding means is formed by the sponge. For this, those shown in FIGS. 2, 4, 5, and 6 were adopted. Examples 13 and 14 adopt the fine hair portion shown in FIG. 7, Examples 15 and 16 adopt the fine hair portion shown in FIG. 8, and Examples 17 and 18 adopt the guide portion shown in FIG.
In Examples 19 and 20, the guide portion shown in FIG. 10 was adopted, but the surface treatment such as water repellency was not performed. Comparative Examples 1 to 4 are carried out without providing the excluding means in the drawings of the respective embodiments.

[0037]

[Table 1]

Although the present invention prevents the large water droplets from being jetted at the time of the next jetting even if the afterdrawing occurs, it can be carried out in combination with a means for preventing the afterdrawing itself. . An example of an injection button provided with means for preventing the afterdraw itself is shown in FIGS. 11 and 12. The ejection mechanism of this ejection button is a suction means for sucking the liquid to be ejected remaining in the ejection path of the ejection button 2 (in this embodiment, the path from the nozzle tip of the ejection button 2 to the ejection hole 7) after ejection. Is provided. This suction means is implemented as a variable volume chamber 101 provided between the injection button 2 and the storage container 1, and a liquid passage hole 102 provided between the variable volume chamber 101 and the discharge path of the injection button 2. Has been done. The volume of the variable volume chamber 101 works such that when the volume of the variable volume chamber 101 is reduced by pressing the injection button 2 and then the pressure of the injection button 2 is released, the volume is increased again. Here, since the variable volume chamber 101 tends to have a negative pressure, the liquid to be injected remaining in the discharge path flows into the variable volume chamber through the liquid passage hole 102. The first reason for this inflow principle is that the liquid to be ejected, which has residual pressure remaining in the discharge passage, changes its capacity through the liquid passage hole 102 due to the resistance when ejected to the outside through the injection hole 7. Room 10
Since the resistance when entering 1 is smaller, the liquid to be injected remaining in the discharge path easily flows into the variable volume chamber 101 and does not send the liquid to be injected, which is an afterdraw, to the injection hole 7. It is because The second principle is that the holding means forming member 106 having the piston portion 105 as shown in the drawings for explaining the embodiment of the present invention.
However, when the injection button 2 is released when the fixing portion 107 is fixed to the storage container 1 at the lower end, the cylinder 105 is fixed by the coil spring 16 while the piston portion 105 is fixed to the storage container 1. Since the portion 103 is forcibly lifted, the variable volume chamber 10 at this time
1 increases while generating negative pressure. Due to this negative pressure, the liquid to be ejected remaining in the discharge path is sucked into the variable volume chamber 101 through the liquid passage hole 102 very quickly and more reliably. For these reasons, the occurrence of afterdraw from the injection hole 7 is more reliably prevented and alleviated.

More specifically, first, the cylinder portion 103 is provided on the injection button 2 side. For more details,
A space portion that opens downward is formed at the lower end of the injection button 2, and this space portion serves as a cylinder portion 103. In this example, the cylinder portion 103 is implemented as an annular concave portion in a plan view, but its shape is the piston portion 1 described below.
On condition that it functions as a cylinder in relation to 05,
It can be changed appropriately. A liquid passage hole 102 having a diameter smaller than that of the cylinder portion 103 is formed between the cylinder portion 103 and an appropriate portion of the discharge path. In this example, the storage chamber 45 is electrically connected, but the location can be changed, such as the communication hole 73 or the nozzle opening 41, or the fluid can be electrically connected to a plurality of locations.
A sealing material 104 such as an O-ring is provided at the open end of the cylinder portion 103, and the piston portion 10
Although the airtightness with 5 is enhanced, this may be provided on the piston part 105 side or may be provided without it.

On the other hand, the cylinder portion 10 is provided on the side of the storage container 1.
A piston portion 105 that is slidably fitted in the inside 3 is provided.
The piston portion 105 is provided on the upper end of the holding means forming member 106 fixed to the upper end of the storage container 1. The holding means forming member 106 is made of an appropriate material such as synthetic resin and has a fixing portion 107 at the lower end. In this example,
The fixing portion 107 is fitted and fixed to the projecting portion 18 of the storage container 1 in which the valve housing 13 is stored, but the fixing method and the fixing position can be appropriately changed.

Next, the operating state of the suction means will be described. First, as shown in FIG. 11, at the stage before the ejection in which the injection button 2 is not pressed, the piston portion 105 is shallowly fitted into the cylinder portion 103.
The space in 03, that is, the capacity of the variable volume chamber 101 is in a large state. Next, as shown in FIG. 12, the injection button 2 is pushed down and the liquid to be injected is sprayed as described above. As a result, the piston portion 105 becomes the cylinder portion 103.
It is inserted deeply into the inside of the cylinder portion 103, and the capacity of the variable volume chamber 101 becomes small.

Next, when the pushing button 2 is stopped,
Returning to the state of FIG. 11, the injection button 2 and the nozzle 11 are pushed back by the coil spring 16, and the outflow of the injectable agent from the storage container 1 is stopped. However, in this embodiment, the spraying agent is gradually discharged from the injection hole 7 by the action of the regulator mechanism section including the sliding member 5, and the injection is attempted to be continued with the residual pressure. . However, due to the rise of the ejection button 2, the ejection button 2 is not pressed and is in a state before ejection, and the volume of the variable volume chamber 101 returns to a large state. As the capacity of the variable volume chamber 101 is increased, the inside thereof becomes negative pressure. Then, due to this negative pressure, the liquid to be injected remaining in the discharge path flows into and is sucked into the variable volume chamber through the liquid passage hole 102, whereby the occurrence of afterdraw is prevented, and the injection is performed with a neat spray. Over.

Finally, the state where the injection button 2 is pressed again to perform injection will be described. When the injection button 2 is pressed again, the capacity of the variable volume chamber 101 becomes smaller. At that time, the air, the liquid to be injected, etc., which has been flown into and sucked into the variable volume chamber 101 as described above, returns to the discharge path (the storage chamber 45 in this example) through the liquid passage hole 102. , Mixed with the propellant or the like in the storage container 1 discharged from the nozzle 11,
When a certain pressure is reached in the above-mentioned manner, it is sprayed from the injection hole 7, so that it is possible to perform the injection in the state of a fine mist.
In this way, this injection device can prevent and alleviate the occurrence of afterdraw and realize a clean spray.

Next, another embodiment will be described with reference to FIG. According to the first principle reason explained in the previous embodiment, even when the holding means forming member 106 does not have the fixing portion 107 at the lower end, the occurrence of afterdraw can be prevented and alleviated. That is, in carrying out the present invention, it is not an absolute condition that the holding means forming member 106 is fixed to the storage container 1 (the holding means forming member 106 has the fixing portion 107 at the lower end). In the thirteenth embodiment, an example in which the holding means forming member 106 is not fixed to the storage container 1 will be described. However, as in the previous embodiment, the fixing portion 10 is attached to the lower end of the holding means forming member 106.
By providing 7 and fixing it to the storage container 1, the cause of afterdrawing can be suppressed very quickly and more reliably.

In the embodiment shown in FIG. 13, the holding means forming member 106 is different from the previous example in that the fixing portion 107 is provided.
However, the contact portion 109 for the storage container 1 is provided. Other configurations are the same as the above example.

At the time of use, the jet button 2 is pushed down to spray the liquid to be jetted as described above. At this time, the abutting portion 109 of the holding means forming member 106 comes into contact with the storage container 1, so that the piston portion 105 of the holding means forming member 106.
Fit deeply into the cylinder part 103,
The internal space, that is, the capacity of the variable volume chamber 101 is reduced.
Next, when you stop pressing the injection button 2, the injection button 2
Also, the nozzle 11 is pushed back by the coil spring 16, and the outflow of the propellant from the storage container 1 is stopped. However, in this embodiment, the spraying agent is gradually discharged from the injection hole 7 by the action of the regulator mechanism section including the sliding member 5, and the injection is attempted to be continued with the residual pressure. . As the injection button 2 rises, the holding means forming member 106 not fixed to the storage container 1 and the piston portion 105 provided on the holding means forming member 106 move to the cylinder portion 10.
3 rises and separates from the storage container 1. In this state, the piston portion 105 is slidable with respect to the cylinder portion 103, so that the inflow resistance from the liquid passage hole 102 into the variable volume chamber 101 is relatively small. On the other hand, the discharge resistance from the injection hole 7 in the discharge path is larger than the inflow resistance because the path is intricate and intricate. As a result, the injected liquid remaining in the discharge path does not flow into the variable volume chamber 101 side through the liquid passage hole 102 due to the residual pressure. As a result, the liquid to be ejected is held inside, and afterdraw is prevented or reduced. When the injection button 2 is pressed again to perform the injection, the capacity of the variable volume chamber 101 becomes smaller (preferably substantially zero).
As a result, the liquid to be injected that has flowed in returns from the liquid passage hole 102 to the discharge path, and merges with the liquid to be injected from the nozzle 11 and is injected. While the ejection button 2 is being pressed, the abutting portion 109 of the holding means forming member 106 abuts the storage container 1 and the capacity thereof is not allowed to be expanded. It does not flow into a large amount.

Next, still another embodiment will be described with reference to FIGS. 14 and 15. The aerosol injection device of this embodiment is of a type that is widely adopted in products that use liquefied gas such as LPG as injection gas.
The container 1 containing the liquid to be ejected, the nozzle 11 provided in the container, and the ejection button 2 provided at the tip of the nozzle are provided, and the ejection button 2 is pressed to eject from the nozzle 11. The liquid to be ejected in the storage container 1 is ejected from the ejection hole 7 through the ejection path provided in the ejection button 2. The configuration inside the storage container 1 such as the valve housing is substantially the same as that of the previous embodiment, and the description thereof is omitted. The injection button 2 is composed of a main body portion 10 and an injection tip 70 having an injection hole 7.
The regulator mechanism portion is not provided in this example, but may be provided and implemented. A nozzle fitting hole 3 is formed in the main body portion 10 of the injection button 2, and the tip of the nozzle 11 is fitted into the nozzle fitting hole 3, and the nozzle 11 is pressed downward by pushing the injection button 2 downward. It can be operated. A vertical hole 201 is formed above the nozzle fitting hole 3, and a horizontal hole 202 is formed from the vertical hole 201.
Extends toward the injection tip 70 and communicates with the injection hole 7. The path from the vertical hole 201 and the horizontal hole 202 to the ejection hole 7 constitutes the ejection path of the ejection button 2.

Also in this embodiment, suction means is formed as means for preventing afterdraw.
This suction means is also substantially the same as that of the previous embodiment, and sucks the liquid to be ejected remaining in the ejection path of the ejection button 2 after ejection. More specifically, the variable volume chamber 101 provided between the injection button 2 and the storage container 1 and the discharge path of the variable volume chamber 101 and the injection button 2 have horizontal holes 202 in this example, (The hole 201 is also possible) and the liquid passage hole 102 provided therebetween. Variable volume chamber 101
The structure is the same as the previous example, and includes a cylinder portion 103 provided on the injection button 2 side and a cylinder portion 103 formed on the holding means forming member 106 on the storage container 1 side.
As in the previous example, the piston portion 105 slidably fitted in the cylinder portion 103 is provided. The sealing material 104 such as an O-ring is, in this example, the cylinder portion 1.
03 and piston part 105 are provided,
This position can be appropriately changed by providing only on the piston part 105 side or only on the cylinder part side. This is the same in the above example. Holding means forming member 1
06 has a fixed portion 107 at the lower end, but in this example,
The fixing portion 107 is not fixed to the projecting portion 18 of the storage container 1 that stores the valve housing 13, but is fitted and fixed to the winding tightening portion 1 a of the storage container. As described above, as the configuration of the fixing portion 107, either of the embodiments may be adopted.

The operating state of the suction means is substantially the same as that of the previous example. As shown in FIG. 15, the volume of the variable volume chamber 101 is reduced as the spray button 2 is pressed and sprayed. . When you stop pressing jet button 2,
Returning to the state of FIG. 14, the spraying stops and the capacity of the variable volume chamber 101 increases. With the expansion of the capacity of the variable volume chamber 101, the inside of the variable volume chamber becomes a negative pressure, and the liquid to be injected remaining in the discharge path is sucked into the variable volume chamber through the liquid passage hole 102, thereby preventing the occurrence of afterdraw. It When the ejection button 2 is pressed again, the capacity of the variable volume chamber 101 becomes small, and the air and the liquid to be injected in the variable volume chamber 101 return to the discharge path through the liquid passage holes 102 and are discharged from the nozzle 11. It is mixed with the sprayed agent and the like in the storage container 1 and is sprayed in a normal, fine mist state. Incidentally, FIG.
4, the injection button 2 used in the aerosol injection device according to the embodiment of the present invention described with reference to FIG. 15 is a general break-up type injection button having no regulator function. Therefore, unlike the case described with reference to FIGS. 11 to 13, there is no sliding member 5 and the communication hole 7
Since 3 is in an open state, in this case, the air, the liquid to be injected, etc. taken into the variable volume chamber 101 will be stored in an open state until the next injection.

In addition to the above embodiments, the present invention can be implemented with various modifications. For example, a variable capacity chamber is not formed by a cylinder and a piston, but a variable capacity flexible bag or bellows is provided. It may be formed of a stretchable container. In this case, these variable volume containers are provided on the injection button 2 side,
The member for pressing the variable volume container may be formed on the holding means forming member 106 on the side of the storage container 1. As described above, in the embodiment shown in FIGS. 11 to 15, the occurrence itself of afterdraw after injection is eliminated or provided with a structure capable of reducing it, but in the injection mechanism of these structures, By using the excluding means shown in each of the above examples together, even if afterdraw should occur remarkably for some reason, the afterdraw droplets will be excluded by the excluding means, so that the next spray It is possible to prevent deterioration of the fog condition.

Finally, FIG. 16 shows an example of attachment of the excluding means, in which the excluding means h is arranged at a predetermined interval (in other words, by providing a central hole) around the injection hole 7, and if necessary. It is fixed by adhesion or the like. In order to secure the fixing of the excluding means h, the cover c is attached and fixed so as to press the outer periphery of the excluding means h. As described above, the fixing method of the excluding means can be variously changed and implemented.

[0052]

As described above, in each of the inventions of the present application, even if the ink is re-injected in the state where the after-draw has occurred, the droplets of the after-draw that remain earlier cause large particles to fly. By preventing the above, it is possible to provide an aerosol injection device capable of injecting a good and clean mist. The improvement of the deterioration of the fog state caused by this afterdraw has been a problem of the inventor for many years, and despite satisfying various attempts to prevent the occurrence of afterdraw, a satisfactory and complete solution is provided. Where I could not make a proposal, I changed the way of thinking, and even if afterdraw occurred, I could get realistic results with a simpler structure by taking measures to improve the fog condition. It was a great surprise and a great joy to the inventor.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of an aerosol injection device according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of an injection button of the aerosol injection device.

FIG. 3 is an enlarged cross-sectional view of an essential part of the aerosol injection device in a state where an injection button is pressed down.

FIG. 4 is an enlarged cross-sectional view of a main part of an injection button of an aerosol injection device according to another embodiment.

FIG. 5 is an enlarged sectional view of a main part of an injection button of an aerosol injection device according to another embodiment.

FIG. 6 is an enlarged sectional view of a main part of an injection button of an aerosol injection device according to another embodiment.

FIG. 7 shows an injection button of an aerosol injection device according to another embodiment, (A) is a side view and (B) is a front view.

FIG. 8 shows an injection button of an aerosol injection device according to another embodiment, (A) is a side view and (B) is a front view.

9A and 9B show an injection button of an aerosol injection device according to another embodiment, FIG. 9A being a perspective view and FIG.

FIG. 10 shows an injection button of an aerosol injection device according to another embodiment, in which (A) is a perspective view and (B) is a cross-sectional view of essential parts.

FIG. 11 is an enlarged cross-sectional view of a main part of an aerosol injection device according to another embodiment.

[FIG. 12] FIG. 12 is an enlarged cross-sectional view of a main part of the aerosol injection device in a state where an injection button is pressed down.

FIG. 13 is an enlarged cross-sectional view of a main part of an aerosol injection device according to another embodiment.

[FIG. 14] FIG. 14 is an enlarged cross-sectional view of a main part of the aerosol injection device in a state where an injection button is pressed down.

FIG. 15 is an enlarged cross-sectional view of a main part of an aerosol injection device according to another embodiment.

[FIG. 16] FIG. 16A is a perspective view of a main part of an aerosol injection device according to another embodiment, and FIG. 16B is an enlarged cross-sectional view of the main part.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Storage container, 2 ... Injection button, 4 ... Space part, 5 ... Sliding member, 6 ... Biasing means, 7 ... Injection hole, 11 ... Nozzle, 12
... Nozzle hole, 13 ... Valve housing, 17 ... Communication hole,
70 ... Injection tip, h ... Exclusion means, k1, k2 ... Capillary parts, a1, a2 ... Guide part

Claims (7)

[Claims] 1. A storage container (1) containing a liquid to be injected, a nozzle (11) provided in the storage container (1), and an injection button (2) provided at the tip of the nozzle, Injection button
By pressing (2), the liquid to be ejected from the storage container (1) ejected from the nozzle (11) is ejected from the ejection hole (7) via the ejection path provided in the ejection button (2). In the aerosol injection device described above, at least below the outer side of the injection hole (7), an excluding means (h) for excluding the droplets of the liquid to be injected that has leaked from the injection hole (7) is provided. Injection device. 2. The excluding means (h) is an adsorbing part provided at least below the outside of the injection hole (7), and the adsorbing part removes the liquid droplets by adsorbing the liquid to be injected. The aerosol device according to claim 1, wherein 3. The excluding means (h) is a water repellent portion provided at least on the outer lower side of the injection hole (7), and the water repellent portion has water repellency with respect to the liquid to be ejected, The aerosol device according to claim 1, wherein the aerosol device ejects the liquid droplets to remove them. 4. The excluding means (h) is a lyophilic portion provided at least on the outer lower side of the injection hole (7), and the lyophilic portion has a lyophilic property with respect to the liquid to be injected. The liquid droplets are dropped and eliminated.
The described aerosol device. 5. The removing means is a fine capillary portion (k1, k2) provided at least on the outer lower side of the injection hole (7), and the liquid to be ejected is eliminated by the fine capillary portion. The aerosol device according to claim 1, which is characterized in that. 6. Exclusion means is a guide part (a1, a2) for guiding the liquid drop of the liquid to be ejected downward, and the liquid drop is excluded by guiding the liquid to be ejected downward with this guide part. The aerosol device according to claim 1, wherein 7. The aerosol device according to claim 1, further comprising a liquid retaining section connected to the excluding means, wherein the liquid droplets eliminated by the excluding means are temporarily retained by the liquid retaining section.