JP2000233144A - Aerosol device with retardation mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol device with a retardation mechanism in which the setting and change of a delay time is relatively easy, and the dispersion of the delay time is controlled. SOLUTION: In an aerosol device A, a micro-capillary 30 for air passage resistance is used in the retardation time control member of a retardation mechanism 5. The mechanism 5 is composed of a cylinder 21 installed between passages 24, 27 from a stem hole to the ejection hole of a nozzle member 28, a piston 25 which moves freely between a position on the side of the first chamber which closes the passages 24, 27 and a position on the side of the second chamber communicating with it in the cylinder 21 and moves to the second chamber side by the pressure of the content discharged from a stem 3, air which is housed in the second chamber and discharged from the second chamber by the movement of the piston 25, and a through hole 29 through which the discharged air passes, and the micro-capillary 30 is inserted into the through hole 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerosol device having a delay mechanism.

[0002]

2. Description of the Related Art In the case of aerosol products, such as insecticides, deodorants, and fragrances, which are sprayed into a room space, in order to spray the contents over a wide area, the aerosol products are placed on the floor and sprayed upward. is there. In this type of product, the direction of the injection hole is close to the operator, and the injection of the contents starts during the operation of the button, so not only does it affect the operator,
There is a problem of suction.

Therefore, it is preferable to use a so-called delay injection mechanism for such a product, in which after a predetermined operation such as pressing an injection button is performed, injection of the contents starts after a while. As the injection delay means, a mechanism is used in which the internal pressure or spring of the aerosol device is used as an energy source, the operation by the energy is slowed down by a high-viscosity fluid or a friction member, and the injection is started after a predetermined time has elapsed. As an apparatus utilizing the internal pressure and high-viscosity liquid of an aerosol apparatus, there is Japanese Patent Publication No. Hei 8-29792 related to the application of the present applicant. In this device, a sealed container is interposed in the middle of the ejection of the contents, and the inside is filled with a high-viscosity liquid. Immediately after the valve is opened, the high-viscosity liquid blocks the outflow hole, so that the contents do not blow out, and the contents are blown out after the high-viscosity fluid flows out. Therefore, the time until the start of ejection can be delayed by the time required for the high-viscosity liquid to flow out.

On the other hand, the present applicant has disclosed a pressure chamber (cylinder or the like) interposed in an ejection path, a slide valve (such as a piston) that slides with the pressure chamber to open and close the ejection path, and controls the movement of the slide valve. There has been proposed an ejection delay mechanism provided with a resistance element for slowing down (see Japanese Patent Application Laid-Open No. 10-53287). As a specific example of the resistance element, there is a fluid pressure pressurized by a piston, in particular, a fluid having a high viscosity, and an orifice as a flow path resistance through which the fluid flows. Since the orifice through which the fluid of the resistance element passes and the ejection hole from which the content is ejected are separate, the time to be delayed can be set relatively freely.

[0005] The injection delay means using the spring includes a cylinder provided at the upper part of the aerosol device, a piston housed therein and movable up and down to press the stem, and hindering the movement of the piston. Is provided with a liquid filled in the lower chamber of the cylinder as described above, a spring for urging the piston downward, and a stopper for locking the piston on the upper side (Japanese Patent Laid-Open No. 10-1998).
No. 157782). This provides a small hole in the piston or a small gap between the piston and the cylinder, allowing liquid to slowly move from those small holes or gaps into the upper chamber of the cylinder as the piston descends. Utilizing this, the lowering speed of the piston is slowed down. By removing the stopper, the piston is lowered by the urging force of the spring, and when the piston reaches the lower end, the stem is pushed in to start injection.

[0006] Other examples using springs include Japanese Utility Model Publication No. 58-63064 and Japanese Utility Model Publication No.
Japanese Patent Application Publication No. 14513 and Japanese Utility Model Publication No. 60-14514 are known. Further, as an apparatus using a bellows instead of a spring and using air as a fluid, an apparatus disclosed in Japanese Utility Model Publication No. 60-14522 is known.

[0007]

Problems to be Solved by the Invention
The device of JP-A-92-92 has the advantage of a simple configuration, but the delay time cannot be freely set because the high-viscosity liquid and the contents to be ejected pass through the same orifice. In the device disclosed in JP-A-10-53287,
Although the problem has been basically solved, it is difficult to accurately set the delay time due to a variation in processing accuracy of an orifice or the like in actual manufacturing. In particular, when the fluid is a gas such as air, the fluid easily passes through the orifice, so that it is difficult to increase the delay time.
Conversely, when a high-viscosity liquid is used as the fluid, the time until the injection is not constant because the viscous resistance fluctuates due to a change in temperature. Further, in the case of a fluid having a large change in viscosity, when the viscosity becomes too high, the fluid cannot be pushed out with the pressure of the content, and there is a possibility that the fluid is not ejected.

Further, it is difficult to set a delay time for a conventional delay mechanism using a spring or bellows, and the same problem as described above occurs when a gas or a highly viscous fluid is used.

An object of the present invention is to provide an aerosol apparatus with a delay mechanism that can relatively easily set and change the delay time, can increase the delay time, and has little variation in the delay time.

[0010]

SUMMARY OF THE INVENTION An aerosol device with a delay mechanism according to the present invention is a delay device having a low-viscosity fluid, a means for moving the fluid, and a microcapillary serving as a passage resistance for controlling the movement time. The ejection mechanism is characterized in that the contents are ejected from the ejection holes after a lapse of a predetermined time from the operation. Here, the microcapillary means a wire material having minute inner holes or grooves, regardless of the material, the degree of hardness and softness, the number of holes, a single member or a composite member. Further, the microcapillary has the same cross section regardless of the section at which the microcapillary is cut, and includes those in which the microcapillary is inserted into a hole such as a passage.

The above operation may be an operation of ejecting contents from the stem by operating a valve, and the fluid may be pressurized by the contents discharged through the valve. Further, the predetermined operation may be an operation for generating a restoring force in the spring, and the fluid may be pressurized using the restoring force of the spring to finally open the stem hole.

The delay mechanism is interposed in a passage from the stem hole to the injection hole, is movable between a position for closing the passage and an open position, and is opened by a pressure of contents discharged from the stem. , A cylinder whose volume changes due to the movement of the piston to the open position, a fluid housed in the cylinder and pushed out by the movement of the piston to the open position, and a fluid pushed out And a resistance passage through which the microcapillary is inserted.

The microcapillary preferably has an inner diameter of 10 to 200 μm and a length of 3 to 50 mm. The fluid may be a gas or a low viscosity liquid.

An aerosol device according to the present invention comprises: a container body;
A valve attached to the upper end of the valve, and a push button attached to the upper end of the stem of the valve and engaged with the container body or the valve so as to maintain the state when pushed in. The one incorporating the delay mechanism is preferred.

The aerosol device of the present invention further comprises a container body, a valve attached to the upper end thereof, and a piston provided near the stem of the valve and opening a stem hole when operated in a direction to reduce the volume. The cylinder mechanism, the fluid to be pressurized when actuated to the side that opens the stem hole filled in the cylinder, the resistance passage that allows the fluid to flow out of the cylinder, and the piston / cylinder mechanism to the open side of the stem A spring for urging, a push button for elastically deforming the spring, and a locking mechanism for holding the push button in a state where the spring is elastically deformed can be provided.

[0016]

In the aerosol device with a delay mechanism according to the present invention, a microcapillary which has a low-viscosity fluid passage resistance is used for the injection control member of the delay mechanism. The size of the resistance can be changed by appropriately selecting, and the hole diameter and length can be changed relatively freely. In particular, when the length is to be shortened, it is possible to simply cut it. Therefore, setting and changing the delay time are easy. Further, since a low-viscosity fluid is used as the fluid, a change in resistance due to a temperature change is small. Therefore, there is little variation in delay time, and there is little possibility of malfunction.

In the case where the operation is to open the stem hole by operating the valve, the pressure in the container body can be used for the pressure of the fluid, so that the delay mechanism is simplified. In the case of an operation for generating a restoring force on the spring, there is an advantage that the ejection path of the contents is simple and the manufacturing is easy.

In the above-described aerosol device having the cylinder and the piston in the delay mechanism, the contents are not immediately ejected from the ejection holes because the piston is at the closed position even when the stem hole is opened. Then, as the contents are ejected from the stem hole, the piston moves to the position where the piston gradually opens. At that time, the volume of the cylinder gradually decreases, and accordingly, the fluid in the cylinder flows out through the microcapillary. Therefore, the moving speed of the piston is regulated by the speed at which the fluid in the cylinder flows out, that is, according to the resistance in the microcapillary. Then, when the fluid in the cylinder decreases and the piston reaches a position where the piston opens, the contents are ejected from the ejection holes for the first time. Thereby, a delayed ejection effect is achieved.

As described above, the delay time depends on the velocity of the fluid in the cylinder passing through the microcapillary and the flow path resistance. Therefore, if the length of the microcapillary is changed, the magnitude of the resistance changes, and consequently the delay time Is changed.
Therefore, it is easy to set and change the delay time.

When the inner diameter of the microcapillary is less than 10 μm, the production is relatively difficult, and a sufficient effect corresponding to the production cost cannot be obtained. If it is desired to increase the resistance further, the length may be increased. The inner diameter is 200μ
If it exceeds m, the length becomes too large to obtain a sufficient flow path resistance, and it becomes inconvenient to handle. For this reason, the thickness is preferably in the range of 10 to 200 μm, particularly 20 to 15 μm.
A range of 0 μm is preferred. When the length of the microcapillary is less than 3 mm, it is necessary to make the hole considerably small in order to obtain a sufficient resistance, and it becomes difficult to manufacture the microcapillary. Conversely, if it exceeds 50 mm, the entire device becomes too large and the usability becomes poor. Therefore 3
The range is preferably 50 to 50 mm, particularly preferably 5 to 30 mm.

When the fluid is a gas, it is convenient because there is no risk of polluting the surroundings after the gas is discharged. In particular, when air is used, there is no need to prepare a separate gas, so that production is easy. It is preferable that the fluid is a liquid having a low viscosity because the viscosity is stable and the pressure change due to thermal expansion is small. Especially when using water or silicone,
It is preferable because there is little adverse effect on the human body. The viscosity of the fluid is generally 100 cP or less (20 ° C.), preferably 5 cP or less.
0 cP or less, more preferably 10 cP or less is used.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an aerosol device with a delay mechanism according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of an essential part showing an embodiment of the aerosol device of the present invention, FIG. 2 is a sectional view showing the whole of the aerosol device, FIG. 3 is a process diagram showing an operation state thereof, and FIGS. FIG. 5A and FIG. 5B are cross-sectional views showing a main part of another embodiment of the aerosol device of the present invention, and FIG. 6 is still another embodiment of the aerosol device of the present invention. FIGS. 7A and 7B are cross-sectional views showing the operation state of the operation.

The aerosol apparatus A shown in FIG. 1 includes a container body 1, a valve 2 attached to the upper end thereof, and a push button 4 attached to a stem 3 of the valve 2. A delay mechanism 5 is incorporated. In this embodiment, a cover 6 is further engaged and fixed to the upper part of the container body 1, and the push button 4 is arranged inside the cover 6 so as to be movable up and down. The cover 6 slides on at least a part of the outer peripheral surface of the push button 4 to guide its vertical movement.

As shown in FIG. 2, the container body 1 is a so-called three-piece can having a cylindrical body 7, a dome 8 attached to the upper end thereof, and a bottom plate 9 closing the lower end. The body 7 is a conventionally known one in which a single metal plate is rolled into a cylindrical shape and seamed. The dome 8 and the bottom plate 9 are fixed by winding. A bead 10 is formed at the upper end opening of the dome 8. The container body 1 is filled with a stock solution to be ejected and a propellant.

The bulb 2 is fixed to the dome 8 by covering the bead 10 with the flange portion 12 of the mounting cup 11 of the valve 2 and crimping the side wall of the mounting cup 11 to the inner surface of the dome 8. A conventionally known stem 3 projects upward from the center of the valve 2. The valve 2 is conventionally known, and in a normal state, the stem 3 is urged upward by a spring. When the stem 3 is pressed downward, the valve rubber closing the stem hole of the stem 3 is disengaged from the stem hole, and the contents in the container body 12 are ejected through the stem 3 through the stem hole. Have been.

Returning to FIG. 1, the cover 6 has a cylindrical shape with a bottom, and a body 7 and a dome 8 are provided on the inner surface at the lower end.
An engagement groove 14 that engages with the winding portion 13 is provided. An opening 15 is formed in the top surface of the cover 6.

The push button 4 has a cylindrical shape having an outer peripheral surface that is in sliding contact with the inner surface of the cover 6, and a cylindrical concave portion 16 that can accommodate the flange portion 12 of the mounting cup 11 of the valve 2 on the lower surface. Are formed. The recess 1
An engagement protrusion 17 is provided on the inner peripheral surface of the projection 6 so as to elastically engage with the lower edge of the flange portion 12 when the push button 4 is pushed in. The engagement projections 17 may be provided in an annular shape, or a plurality of them may be radially arranged. On the upper surface of the push button 4, there is provided a finger pushing portion 18 which is in sliding contact with the opening 15 on the top surface of the cover 6. Opening 15 and finger pressing part 18
May be circular or square. The upper surface of the finger pressing portion 18 protrudes from the top surface of the cover 6 when the push button 6 is not pressed.

At the center of the recess 16 on the lower surface of the push button 6, a stem fitting hole 20 for fitting with the stem 3 is formed. Further, a cylindrical cylinder 21 is formed from the outer peripheral surface of the push button 6 toward the center, and its opening is closed with a plug 22. An O-ring 23 seals between the plug 22 and the inner wall of the cylinder 21. The upper end of the stem fitting hole 20 and the vicinity of the bottom of the cylinder 21 (the right end in FIG. 1) communicate with each other through a first passage 24. Cylinder 21
Inside, a cylindrical piston 25 is accommodated movably in the axial direction. O-rings 26, 26 for sealing between the piston 21 and the cylinder 21 are attached near both ends of the piston 25.

A second passage 27 extends from an intermediate portion of the cylinder 21 toward the finger pressing portion 18. The open end of the second passage 27 into the cylinder is a position where the side of the piston 25 is closed when the piston 25 is at the innermost part. A conventionally known nozzle member 28 is attached to an open end of the finger pressing portion 18 of the second passage 27. Further, a through hole 29 is formed upward from the vicinity of the end on the opening side of the cylinder 21, and the microcapillary 30 is accommodated in the through hole 29. In this embodiment, the upper end of the through hole 29 is
The push button 6 is open at the shoulder 31. The above-described cylinder 21, piston 25, and microcapillary 30 are:
The above-described delay mechanism 5 is configured.

In this embodiment, the microcapillary 30 is a wire made of synthetic resin and having a circular cross section, and has a small hole penetrating at the center. The type of the synthetic resin is not particularly limited, and a thermoplastic resin such as polyethylene, polypropylene, nylon, polyvinyl chloride, and Duracon, which is extruded, is preferable. The inner diameter of the microcapillary 30 is about 10 to 200 μm, and the length is about 3 to 50 mm.

The space in the cylinder 21 is isolated by a piston 25 into a first chamber R1 communicating with the stem fitting hole 20 and a second chamber R2 communicating with the microcapillary 30. The volume of the second chamber R2 is about 0.5 to 50 ml. The inner diameter of the first passage 24 and the second passage 27 is 0.3
It is about 3.0 mm. First passage 24 and second passage 27
1 is blocked by the piston 25 in the state of FIG. 1, but when the piston 25 moves to the left, the first chamber R1 in the cylinder 21 communicates with the first chamber R1. In that case, the first passage 2
4, the first chamber R1 and the second passage 27 serve as a passage for the contents from the stem 3 to the ejection hole of the nozzle member 28, and FIG.
In this state, the piston 25 blocks the passage. This state is a state where the passage is closed. And the state where the piston 25 went to the left side is the state where the passage was opened.

Next, the operation of the delay mechanism 5 configured as described above will be described with reference to FIG. When the push button 4 is not depressed, the valve 3 is closed because the stem 3 is not depressed. Therefore, the contents in the container body 1 do not squirt from the stem 3 (refer to the first step S1). Further, the piston 25 is located at a position where the first passage 24 at the right end is closed, and the volume of the first chamber R1 is substantially zero. On the other hand, since the second chamber R2 communicates with the outside via the microcapillary 30, air is contained therein. However, other fluids may be filled.

Next, when the push button 4 is depressed as in the second step S2, the stem 3 is lowered against the urging force of the spring, and the valve 2 is opened. At this time, the engaging projection 17 of the push button 4 is connected to the flange 1 of the mounting cup 11.
2, the valve 2 is kept open. When the valve 2 is opened, the contents in the container body 1 are continuously ejected from the stem hole into the stem 3, and the contents enter the first chamber R <b> 1 in the cylinder 21 through the first passage 24. When the pressure in the first chamber R1 rises, the piston 25 is pushed to the left somewhat as in the third step S3. However, in this state, since the opening of the second passage 27 on the cylinder 21 side is still closed by the piston 25, the contents only enter the first chamber R1 and do not squirt out.

When the piston 25 moves to the left, the second
The air in the chamber R2 is compressed and the microcapillary 30
Released to the outside. At this time, only a small amount of air flows out due to the passage resistance of the holes of the microcapillary 30. Therefore, the piston 25 slowly moves to the left as the first chamber R1 is filled with the contents and as the air in the second chamber R2 is discharged outside through the microcapillary 30.

The contents in the first chamber R1 are the piston 2
When 5 is pushed to the vicinity of the left end, as shown in the fourth step S4, the open end of the second passage 27 on the cylinder side is disengaged from the right end of the piston 25, and communicates with the first chamber R1. Therefore, the contents from inside the container body 1 pass through the first passage 24, the first chamber R1 of the cylinder, and the second passage 27, and the nozzle member 28
Erupts from the outlet.

The time from when the push button 4 is pressed (second step S2) to when the contents are ejected from the ejection holes is:
The size of the first chamber R1 when the piston has moved to the left end, the size of the second chamber R2 when the piston is at the right end, the inside diameter and length of the microcapillary 30, the internal pressure of the container body 1, the stem hole The diameter is determined by the flow path resistance of the valve 2 such as the diameter of the valve 2, and is usually set to 5 seconds or longer.

Depending on the contents of the aerosol product, it may be desirable to shorten or increase the delay time. In that case, the microcapillary 30 in the through hole 29 of the push button 4 may be changed to a larger or smaller inner diameter by using the same push button 4. It is also possible to cope with this by making the length of the microcapillary 30 shorter or longer.

FIG. 4A shows a basic configuration of the microcapillary 30 used in the aerosol device of the present invention. This is, for example, a cylindrical wire rod 32 having an outer diameter of 0.8 mm, and a single inner hole 33 of 10 to 200 μm penetrates along the center at the center. The number of the inner holes 32 is not particularly limited, and may be two or more.

FIG. 4b shows the microcapillary 3 of FIG. 4a.
It is substantially the same as 0, and the number of the inner holes 33 is three. Since the cross-sectional area of the inner hole 33 is three times that in the case of FIG. 4A, the flow path resistance is small, and thus the delay time is short under the same conditions.

FIG. 4C shows an example in which four grooves 34 are formed on the surface of a cylindrical wire without providing a penetrating inner hole. Groove 3
4 has a semicircular cross section. The number of grooves and the cross-sectional shape are not particularly limited. It does not act as a microcapillary by itself. When this is closely fitted in the through hole 29 of the push button 4 in FIG. 1, the closed hole is formed because the inner surface of the through hole 29 covers the opening of the groove 34. Thereby, the hole becomes a minute passage through which air or the like passes. The material and the outer diameter of the wire 32 are the same as those in FIG. 4A. Note that a microcapillary having both the groove 34 in FIG. 4C and the inner hole 33 in FIG. 4A or FIG. 4B can be employed.

FIG. 4D shows an embodiment of the microcapillary 30 in which an inner hole 33 having a complicated cross-sectional shape is formed in the wire 32. In this case, six ridges 35 project from the inner surface of the inner hole 33 having a relatively large diameter, and lateral ridges 36 and 37 further project from both side surfaces of each ridge 35. The horizontal ridges 36 and 37 are arranged on the tip side and the base side every other one of the vertical ridges 35 so that they do not interfere with each other.
In addition, the gap between the horizontal protrusions 36 and 37 is narrowed. In addition, between the protrusions 35 on the inner surface of the inward 33, 3
A small ridge 38 is provided for each book, so that the remaining space is made as narrow as possible as a whole.

The cross-sectional area of the inner hole 33 is 0.01 to
Although it is relatively large at 0.3 mm ² , the length of the contour line on the inner surface is extremely large. Therefore, the surface area is large and the fluid resistance is also large. The microcapillary 30 having such a complicated shape is used when the size of the inner hole is limited or when it is desired to obtain a large resistance even with the same diameter. For example, in the case of a low-viscosity liquid such as water or silicone, the inner hole cannot be made so small, and therefore the tubular microcapillary 30 shown in FIG. 4D is preferable.

The delay mechanism 40 shown in FIG.
A pilot passage 41 is provided from the air passage to the first chamber R1 of the cylinder, and the microcapillary 30 is inserted into the pilot passage 41. The pilot passage 41 is formed in a U-shape. However, it is not limited to this. The second chamber R2 communicates with the outside through a through hole 43. In this embodiment, the through hole 43 is formed in the plug 22. The microcapillary 30 has a through hole 4 of a plug 44 provided on the opposite side.
5, and the open end of the through hole 45 is closed with a small plug 46. The through hole 45 becomes a part of the pilot passage.

When the valve is opened by pressing the push button 4, the first chamber R1 is filled with the contents from the stem 3 through the pilot passage 41. At that time, the flow velocity of the contents becomes slow due to the flow path resistance of the microcapillary 30. The first passage 24 is closed by a piston 25.
As the first chamber R1 is filled with the contents, the pressure causes the piston 25 to gradually move to the left as shown in FIG. 5b. Then, the first passage 24 and the second passage 27
When communicating with the chamber R1, the contents are transferred to the first passage 24, the first chamber R.
Through the first and second passages 27, the gas is ejected from the ejection holes of the nozzle member 28 to the outside.

In the embodiment of FIG. 5a, not only the gas,
Liquid also passes through microcapillary 30. Therefore, it is suitable for an aerosol device using a liquid having relatively low viscous resistance. In the case of a microcapillary that allows such contents to pass through, the cross-sectional area of the inner hole is about 30 to 300 μm,
The length is preferably about 3 to 50 mm. The delay mechanism of this embodiment has a through hole 43 communicating from the second chamber R2 to the outside.
A micro-capillary for gas may be accommodated in the hopper and used together with the delay mechanism 5 of FIG.

FIG. 6 shows an aerosol device of the type that controls the time from when the push button is pressed to when the stem is activated, and FIGS. 7a and 7b show the operation procedure. The aerosol device B includes a cylindrical holder 50 having a bottom provided at an upper portion of the valve 2, a sliding member 51 combined with the holder to form a piston-cylinder mechanism, and A spring 53 is provided for urging the mechanism in a direction to reduce the volume, and a push button 4 for elastically deforming the spring.

The holder 50 has a partition wall 55 having a hole 54 in the center facing the stem 3, a peripheral wall 56 rising from the periphery of the partition wall 55, and a lower part of the valve 2 extending below the peripheral wall.
Legs 56 attached to the mounting cup 11
a. The peripheral wall 56 is usually cylindrical. The sliding member 51 includes a cylindrical outer peripheral wall 57 slidably and airtightly fitted to an outer peripheral surface of a peripheral wall 56 of the holder 50, an end wall 58 for closing an upper end thereof, and a center of the end wall 58. And a shaft portion 59 extending vertically through the shaft. Holder 50
The piston-cylinder mechanism composed of the sliding member 51 and
1 is a piston, and the holder 50 is a cylinder.
However, from a different viewpoint, it can be considered that the holder 50 entering the inside is a piston, the sliding member 51 outside the cylinder is a cylinder, and the cylinder moves up and down.

A passage 60 penetrating along the axis is provided at the center of the shaft portion 59 of the sliding member 51, and has a stem fitting hole 20 at the lower end for airtight fitting with the upper portion of the stem 3. The nozzle member 28 is attached to the upper end of the shaft 59. Further, on the outer peripheral surface of the outer peripheral wall 57 of the sliding member 51, a flange 63 that engages with the lower end of the spring 53 is provided. The flange 63 is provided on the outer periphery of the lower end of the outer peripheral wall 57. The lower portion of the shaft portion 59 is fitted in the hole 54 of the holder 50 in an airtight and slidable manner. Therefore, the sliding member 51
The space S enclosed by the end wall 58 and the outer peripheral wall 57 of the holder 50 and the partition wall 55 and the peripheral wall 56 of the holder 50 is kept airtight. This space S is the second chamber R2 in the embodiment of FIG.
Has substantially the same effect. Further, a through hole 29 is formed in the end wall 58, and the microcapillary 30 is fitted into the through hole 29.

The push button 4 has a bottomed cylindrical shape, and includes a side surface portion 64 that slides on the outer peripheral surface of the flange 63 of the sliding member 51 and a top surface portion 65 that covers the upper surface thereof. A hole 66 is formed in the center of the top surface 65 so as to allow the shaft 59 of the sliding member 51 to pass therethrough. A projection 67 that engages with the flange portion 12 of the mounting cup 11 of the valve 2 is provided on the inner surface of the lower end of the side surface portion 64. The lower surface side of the projection 67 is tapered so that it can be easily fitted to the flange portion 12 and is hard to come out once fitted. The spring 53 described above is interposed between the flange 63 of the sliding member 51 and the top surface 65 of the push button 4. The spring 53 is a compression coil spring. In this embodiment, the outer peripheral wall 57 of the sliding member 51
Is fitted to the outside of the holder 50, and a spring 53 is
Is provided, there is an advantage that a long spring, that is, a spring having a large stored energy can be employed. Further, the outer surface of the sliding member 51 and the inner surface of the side portion 64 of the push button 4 can be used as a guide for the spring 53. Further, the flange 63 of the sliding member 51 can function as a guide for the push button 4.

The aerosol device B constructed as described above
In FIG. 7a, the user presses the push button 4
Is pressed down, a force acts on the sliding member 51 via the spring 53. At this time, the air in the space S tries to escape to the outside through the microcapillary 30, but does not escape immediately due to the passage resistance of the microcapillary 30, and the sliding member 51 does not yet descend. As a result, only the push button 4 descends while compressing the spring 53. Then, the projection 63 engages with the flange 12 of the mounting cup 11 at the lower end. In this state, the user leaves and evacuates.

In this state, the compressed spring 53 urges the sliding member 51 downward, so that the sliding member 5
1 slowly descends according to the speed at which the air in the space S passes through the microcapillary 30. Then, the stem fitting hole 61 of the shaft portion 59 of the sliding member 51 is fitted to the stem 3. When the sliding member 51 continues to descend further from that state, the stem 3 is pushed in, and finally, as shown in FIG. 7B, the valve 2 is opened to open the stem hole, and the passage 60 of the stem 3 and the shaft portion 59 is opened. Through the nozzle member 28
The contents are ejected from.

In the embodiment shown in FIG. 6, the outer peripheral wall 57 of the sliding member 51 is fitted to the outer periphery of the holder 50. However, the peripheral wall 56 of the holder 50 is extended upward, and the end wall 58 of the sliding member 51 is extended. Can be slidably fitted in the peripheral wall 56 like a normal piston. In that case, the push button 4 is guided by the shaft 59 or the holder 50
You should be guided by. Alternatively, the spring 53 may be subjected to compression deformation in advance as in the state of FIG. 7A, and the lowering of the sliding member 51 may be stopped by a removable stopper 68 as indicated by an imaginary line. In this case, by removing the stopper 68, the sliding member 51 starts to descend, and the injection starts after the elapse of a predetermined delay time in the same manner as described above.

[0053]

Next, the aerosol device of the present invention will be described based on specific examples. A stock solution obtained by dissolving an active ingredient of a fumigant in alcohol was charged into a tin-resistant pressure-resistant metal container as shown in FIG. 2, a valve was attached, and liquefied petroleum gas was charged as a propellant. Product pressure is 0.3MPa (2
5 ° C.). The delay mechanism shown in FIG. 1 was attached to this. The cross-sectional area of the cylinder 21 was 1 cm ² , and the volume was 3 ml.

[Effect of Injection Delay Time by Pore Diameter] For the above aerosol product, a microcapillary having one inner hole shown in FIG. 4A was used. The outer diameter of the capillary tube was fixed at 0.8 mm and the length was fixed at 10 mm, and the delay time was measured while changing the inner hole diameter to 40, 100, 150, and 300 μm. Table 1 shows the results.

[0055]

[Table 1]

According to the results shown in Table 1, the smaller the diameter of the inner hole, the longer the injection delay time. It can also be seen that, even when the length of the microcapillary is relatively short, 10 mm, a sufficient time for the user to evacuate can be delayed by reducing the pore diameter to some extent.

[Effect of Injection Delay Time by Tube Length] Next, the outer diameter of the capillary tube was 0.8 mm,
The diameter of the inner hole is fixed at 40 μm, and the length is 5, 10, 20,
The delay time was measured while changing to 30 and 50 mm. Table 2 shows the results.

[0058]

[Table 2]

As is clear from the results in Table 2, the longer the tube length, the longer the delay time. But 5mm
It can be seen that the time required for the evacuation can be sufficiently delayed even with a short tube.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of an aerosol device of the present invention.

FIG. 2 is a sectional view showing the entire aerosol device.

FIG. 3 is a process diagram showing an operation state of the aerosol device.

4a to 4d are cross-sectional views each showing an embodiment of a microcapillary according to the present invention.

5A and 5B are a cross-sectional view of a main part and a cross-sectional view of a main part in an operating state showing another embodiment of the aerosol device of the present invention.

FIG. 6 is a cross-sectional view of a main part showing still another embodiment of the aerosol device of the present invention.

FIGS. 7A and 7B are process diagrams showing the operation state.

[Explanation of symbols]

 Reference Signs List A aerosol device 1 container body 2 valve 3 stem 4 push button 5 delay mechanism 6 cover 11 mounting cup 12 flange portion 17 engagement protrusion 21 cylinder 24 first passage 25 piston 27 second passage 28 nozzle member 29 through-hole 30 microcapillary R1 1st room R2 2nd room 32 Wire 33 Inner hole 34 Groove 35 Ridge 40 Delay mechanism 41 Pilot passage 43 Through hole 45 Through hole B Aerosol device 50 Holder 51 Sliding member 53 Spring 55 Partition wall 56 Peripheral wall 57 Peripheral wall 58 End Wall 59 Shaft portion 60 Passage S space 64 Side surface portion 65 Top surface portion 67 Projection 68 Stopper

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E014 PA01 PB01 PB07 PC02 PD01 PE09 PE17 PE18 PE21 PF10 4F033 RA02 RA20 RB05 RC04 RC05 RC07

Claims (9)

[Claims] 1. A delay injection mechanism having a low-viscosity fluid, a means for moving the fluid, and a micro-capillary serving as a passage resistance for controlling the movement time, the contents of which are discharged from the injection holes after a lapse of a predetermined time from the operation. An aerosol device wherein an object is ejected. 2. The aerosol device according to claim 1, wherein the operation is an operation of opening a stem hole by operating a valve, and the fluid is pressurized by contents discharged through the valve. 3. The aerosol according to claim 1, wherein the operation is an operation for generating a restoring force in the spring, and the fluid is pressurized by using the restoring force of the spring, and the stem hole is opened by the restoring force. apparatus. 4. The delay mechanism is interposed in a passage from the stem hole to the injection hole, is movable between a position where the passage is closed and a position where the passage is opened, and is activated by the pressure of the contents discharged from the stem. A piston that moves to the open position side, a cylinder whose volume changes due to the movement of the piston to the open position side, and a low-viscosity liquid that is housed in the cylinder and pressurized by moving the piston to the open position side 3. The aerosol device according to claim 2, comprising a fluid and a resistance passage through which the pressurized fluid passes, wherein the microcapillary is inserted into the resistance passage. 5. The microcapillary having an inner diameter of 10
1 to 200 μm and a length of 3 to 50 mm.
The aerosol device according to 2, 3, or 4. 6. The method according to claim 1, wherein the fluid is a gas.
The aerosol device according to 3, 4 or 5. 7. The aerosol device according to claim 1, wherein the fluid is a low-viscosity liquid. 8. A container body, a valve attached to an upper end thereof, and a valve attached to an upper end of a stem of the valve,
A push button which engages with the container body or the valve to maintain the state when pushed, wherein the delay mechanism is incorporated in the push button. The aerosol device according to 5, 6 or 7. 9. A container body, a valve attached to an upper end thereof, a piston / cylinder mechanism provided near a stem of the valve and opening a stem hole when actuated in a direction of decreasing the volume, and a cylinder inside the cylinder. And when it is actuated to open the stem hole, the fluid is pressurized,
A resistance passage for allowing the fluid to flow out of the cylinder, a spring for urging the piston / cylinder mechanism toward the open side of the stem, and a push button for elastically deforming the spring.
An aerosol device having a locking mechanism for holding the push button in a state in which a spring is elastically deformed.