JPH0529093Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a small diameter aerosol device. More specifically, the present invention relates to a small-diameter aerosol device used for spraying household spray medicines, perfumes, and other cosmetics.

[Prior Art] Aerosol devices have been widely used in our daily lives because they are easy to handle.
As shown in FIG. 4, these aerosol devices generally have a valve unit 52 attached to one end of a bottomed cylindrical container 50 by a mounting cap 51.
It is tightened.

[Problems to be Solved by the Invention] All conventional aerosol devices use a mounting cap to attach the valve unit, so the mounting cap 51 has a crimping part for crimping the valve unit 52 and a crimping part for crimping the valve unit 52 to the container 50. A caulking part is required. Therefore, in a small-diameter aerosol device where the diameter of the container 50 is slightly larger than the outer diameter of the valve unit 52, it is extremely difficult to attach a caulking part to the mounting cap. Only aerosol devices with a diameter of

The inventors of the present invention have conducted various studies in order to put into practical use a small-diameter aerosol device in which the diameter of the container is not much different from the outside diameter of the valve unit to which it is attached. Breaking away from the conventional wisdom of technology, the company successfully succeeded in commercializing a small-diameter aerosol device by thinking from different angles.

The present invention provides a practical and small-diameter aerosol device completed based on this idea.

[Means for Solving the Problems] The aerosol device of the present invention consists of (a) a small-diameter aluminum body that is open at the bottom end and has an annular shoulder formed at the top end with a hole for passing the valve stem; A valve unit comprising a cylindrical container made of a metal material, and (b) a valve housing, a valve stem whose lower portion is loosely fitted into the valve housing, and a spring interposed between the valve housing and the valve stem, is inserted into the upper end side of the cylindrical container and fixed by caulking the upper part of the cylindrical container from the outer periphery,
Further, an inner annular protrusion is formed on the inner circumferential surface of the cylindrical container near the open end thereof, and a bottom lid having a circumferentially curved portion that engages with the inner annular protrusion is attached to the cylindrical container. By being pressed and fitted to the bottom end of the shaped container, the inner annular protrusion more closely engages with the curved part, so that the fitting is made more securely. ing.

[Function] In the aerosol device of the present invention, when the valve unit is inserted into the upper end of the cylindrical container, the valve unit is positioned against the annular shoulder.
Once this state is fixed with an appropriate jig, the valve unit is then fixed in the cylindrical container by caulking a predetermined portion of the upper part of the cylindrical container from the outer periphery, and the crimped portion and the annular shoulder are used to secure the valve unit within the cylindrical container. can do. An inner annular protrusion is formed near the open end of the cylindrical container, and a bottom lid having a circumferentially curved portion that engages with the inner annular protrusion is fitted onto the bottom end of the cylindrical container. Press it so that it fits. Then, after the fitting, the inner annular protrusion is plastically deformed by the pressing force and engages the curved part more closely, so that the bottom cover is firmly fixed to the cylindrical container.

As described above, the present invention eliminates the need to use a mounting cap. Therefore, when using a mounting cap, two
Several caulking portions (described in detail on page 2 of this specification) are no longer required. In the present invention, only one caulking portion is required, and the caulking is only performed from the outer periphery. Therefore, since the caulking part does not take up space, the valve unit can be attached to a container with a small diameter without any problem.

In addition, since a simple annular protrusion of the cylindrical container may be formed in order to fit the bottom lid, reducing the diameter of the container is not a problem at all.

[Example] Next, an example of the present invention will be described based on the drawings.

FIG. 1 is a longitudinal cross-sectional view of an aerosol device 1 according to a first embodiment of the present invention, FIG. 2 is an explanatory diagram of the manufacturing process of the aerosol device 1 shown in FIG. 1, and FIG. FIG. 2 is a longitudinal cross-sectional view of an aerosol device 2 according to a second embodiment.

The first embodiment shows the aerosol device 1 of the first embodiment.
In the figure, 11 is a cylindrical container, 12 is a valve unit, and 13 is a bottom cover.

The cylindrical container 11 has a small diameter, is molded from aluminum, has an open bottom end, and has an annular shoulder 14 formed in advance on the top end. The valve unit 12 consists of a valve housing 15 in the shape of a short cylinder with a bottom, a valve stem 16, and a spring 17. The lower part of the valve stem 16 is loosely fitted into the valve housing 15, and the spring 17 is interposed. The valve housing 15 has a through hole 18 bored in its wall, and a large diameter part 19 in the upper part.
is formed. The large diameter portion 19 has an inclined surface 19a formed on its lower surface. valve stem 16
A passage 20 is bored therein and extends along the axial direction, and an orifice 21 is provided at the bottom end of the passage 20, which is bored in the radial direction.
Further, a push button 24 having an injection hole 23 is attached to the upper end. A ring-shaped rubber gasket 22 is interposed between the annular shoulder portion 14 and the large diameter portion 19, so that the upper opening of the cylindrical container 11 is sealed. In addition, the inner peripheral surface of the rubber packing 22 is connected to the valve stem 16.
If the orifice 21 is not pressed down,
The orifice 21 is closed by closely contacting the opening surface of the orifice 21. When the push button 24 attached to the tip of the valve stem 16 is pressed down with a finger, the valve stem 16 compresses the spring 17 and is pushed down a little, causing the rubber packing 22 to bend downward and the orifice 21 to open into the valve housing 15. Ru. In this state, the aerosol contents in the cylindrical container 11 are injected to the outside from the injection hole 23 through the valve housing 15 -> orifice 21 -> passage 20. Note that the dip tube 25 attached to the lower part of the valve housing 15 is for supplying the aerosol contents into the inside of the valve housing 15 from the bottom of the cylindrical container 11, and is provided as necessary. The valve unit 12 described above
is fixed inside the upper end side of the cylindrical container 11 by caulking the upper part of the cylindrical container 11 from the outer periphery. The caulked portion 26 is attached to the valve housing 15.
It is formed directly below the large diameter portion 19 of , so as to narrow inwardly. The large diameter portion 19 of the valve housing 15 is fixed by the caulking portion 26 so as to be sandwiched between the large diameter portion 19 and the annular shoulder portion 14 at the upper end of the cylindrical container 11.

The bottom cover 13 is fitted onto the open bottom end of the cylindrical container 11. Therefore, on the outer periphery of the bottom cover 13,
An outer wall 28 and an inner wall 29 forming a groove 27 are provided in a ring shape, and the groove 27 has a curved portion 30 formed at its upper portion. On the other hand, a curved portion 31 that fits into the curved portion 30 is provided near the bottom end of the cylindrical container 11 . On the other hand, a curved portion 31 that fits into the curved portion 30 is provided near the bottom end of the cylindrical container 11 . Then, the bottom end of this cylindrical container 11 is connected to the groove 2.
7 to fit into the curved portion 30, the curved portion 31 is plastically deformed to fit into the curved portion 30 more closely. In this way, the bottom cover 13 can be firmly and tightly fitted to the cylindrical container 11. Note that a rubber gasket 32 is provided between the end surface of the cylindrical container 11 and the groove 27.
is fitted to improve the sealing performance of the cylindrical container 11. Note that the bottom cover 13 is curved so that the central portion is raised, thereby increasing pressure resistance.

Next, the manufacturing process of the aerosol device 1 is carried out in a second step.
This will be explained based on the diagram. First, in step A, the cylindrical container 11 is prepared before the valve unit 12 is attached. In this step A, the bottom end side of the cylindrical container 11 is open, and the annular shoulder portion 14 is formed at the top end side. In the next step B, the valve unit 12 is inserted into the upper end side of the cylindrical container 11 together with the rubber packing 22. At this time, use an appropriate jig (not shown) to attach the valve unit 1.
2 toward the upper end (in the direction of arrow Y), the valve unit 12 is automatically positioned against the annular shoulder 14. As a result of positioning in this manner, the valve unit 12 does not vary from component to component, making assembly work much easier. In step C, caulking work is performed. When the caulked portion 26 is thereby formed, the valve unit 12 is fixed by the annular shoulder portion 14 formed on the cylindrical container 11 and the caulked portion 26. Next, in the final step D, after attaching the dip tube 25 as necessary, the bottom cover 13 is fitted onto the bottom end of the cylindrical container 11 while being pressed, thereby firmly fixing it. Furthermore, by attaching the push button 24 to the valve stem 16, the aerosol device 1 of this embodiment is completed. In addition, Date Petit Yube 25 is B
It may be attached to the valve unit 12 during the process.

As explained above, in the aerosol device 1 of the present invention, the valve unit 12 is attached by directly caulking the cylindrical container 11, so it is possible to easily manufacture a small-diameter aerosol device without space for attaching a mounting cap. This is possible.

Next, an aerosol device 2 according to a second embodiment will be explained based on FIG. In this embodiment, the cylindrical container 1
1 and the valve unit 12 have the same construction as in the first embodiment, and the valve unit 12 is fixed to the cylindrical container 11 by the caulking portion 26. Therefore, the aerosol device 2 of this embodiment also directly caulks the cylindrical container 11 through steps A to C shown in FIG.
can be attached.

However, the aerosol device 2 of this embodiment has a cylindrical container 1.
1 has a free piston 33 built in, and the aerosol contents are injected by the rise of the free piston 33, so the bottom cover 1
Only the configuration of No. 3 is slightly different.

The bottom cover 13 in this embodiment has a pressure chamber 34 defined in the center by a free piston 33.
A valve 35 is provided for injecting propellant agent into the tank. The valve 35 is pressed against the upper surface of the injection hole 36 by an annular wall 37 formed around an injection hole 36 bored in the center of the bottom cover 13 and a cap 38 fitted into the annular wall 37. It consists of a rubber stopper 39. The cap 38 is provided with an appropriate number of small holes 40. When the valve 35 is firmly inserted into the injection hole 36 with a pipe-shaped injection port such as a cylinder containing propellant, the rubber stopper 39 is bent and the propellant jetted from the cylinder passes through the small hole 40. is injected into the pressure chamber 34.
In addition, this bottom lid 13 is formed with a fitting part 41 having a C-shaped cross section and open on the outer circumferential side, and an inner annular fitting part 41 formed on the inner circumferential surface near the open end of the cylindrical container 11. It is adapted to fit strongly into the protrusion 42. At this time, in order to plastically deform the annular convex portion 42 and fix it to the fitting portion 41, a cylindrical guide member or the like is fitted to the outer periphery near the bottom of the cylindrical container 11, and then the bottom lid 13 is pressed. It is preferable to fit the two together.

In the present embodiment with the above configuration, the valve unit 12 is crimped onto the cylindrical container 11 through steps A to C shown in FIG. 2, and then the free piston 33 is inserted, and the bottom cover 13 push button 2
It is completed by attaching 4. Since the aerosol device 2 of this embodiment can also be manufactured without using a mounting cap, it is extremely easy to configure it as a small-diameter aerosol device.

[Effects of the invention] In the aerosol device of the invention, the valve unit is attached by directly caulking the cylindrical container without using a mounting cap.
For example, even a small-diameter aerosol device in which the diameter of the cylindrical container is not much different from the outer diameter of the valve unit can be easily manufactured with a relatively small number of man-hours. Furthermore, since the bottom cover is joined to the cylindrical container by fitting, processing is simple and it becomes possible to realize an aerosol device with a smaller diameter.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an aerosol device 1 according to a first embodiment of the present invention, FIG. 2 is an explanatory diagram of the manufacturing process of the aerosol device 1 shown in FIG. 1, and FIG. A vertical sectional view of an aerosol device 2 according to the second embodiment, and FIG. 4 is a partial sectional view of a conventional aerosol device. Main symbols in the drawings, 11... cylindrical container, 12...
Valve unit, 13...bottom cover, 15...valve housing, 16...valve stem, 17...spring.

Claims (1)

[Utility model claim] (a) A small-diameter aluminum cylindrical container having an open bottom end and an annular shoulder at its upper end with a hole for the valve stem to pass through, and (b) a valve unit consisting of a valve housing, a valve stem the lower portion of which is loosely fitted into the valve housing, and a spring interposed between the valve housing and the valve stem, the valve unit being inserted inside the upper end side of the cylindrical container and fixed by crimping the upper portion of the cylindrical container from the outer periphery,
The cylindrical container has an inner annular protrusion formed on a circumferential surface near an open end thereof, and a bottom cover having a circumferentially curved portion that engages with the inner annular protrusion,
13. An aerosol device according to claim 12, wherein said inner annular projection is more closely engaged with said curved portion by being pressed against the bottom end of said cylindrical container, thereby providing a firm fit.