JPH0534065B2 - - Google Patents

Description

[Detailed Description of the Invention] (Object of the Invention) This inventor has published Utility Model Publication No. 50-29130
In Publication No. 51-10686, etc., a plurality of elastic finger pieces that stand up or hang down like fingers are used in place of the conventional coil spring, and the valve stem is elastically supported by engaging the finger tips with an inclined wall. proposed an aerosol injection device. According to these proposals, since the elastic support means of the valve stem is integrated with the valve housing or the valve stem, the coil spring that has been widely used in the past can be omitted, and parts management is simplified, which is a significant advantage. However, in the above proposal, although the valve housing can be molded using a cutting die like conventional valve housings, the valve stem can only be molded using a vertically split die, and the elastic fingers are different from coil springs. Since the elastic support force of the valve stem is weak, leakage of injection gas and liquid often occurs due to burrs that tend to remain on the valve stem due to split molding. Therefore, the inventor proposed a means to overcome this drawback in Utility Model Publication No. 63-371. According to this proposal, there is an added advantage that the valve stem can be molded using a cutting die, which certainly reduces the incidence of leakage. However, the valve stem in that proposal has a complicated structure in which a vertical groove is bored in the tube wall and the groove is sealed with a wedge wall provided on the inner surface of the tube handle of the push button. The molding process and the production of molds that could maintain the grooves and wedge walls at accurate dimensions were extremely difficult. Therefore, the purpose of the present invention is to solve these difficulties in the proposal of Utility Model Publication No. 63-371, and to provide a means for eliminating the occurrence of leakage.

(Structure of the Invention) The present invention will be described below with reference to the illustrated embodiment. Reference numeral 11 denotes a turret portion of a mountain cup 1 of an aerosol container, and a valve housing 3 is connected to the turret portion 11 via an annular elastic gasket 2. A mouth portion 31 is fitted.

Reference numeral 41 denotes a hollow part of the valve stem 4 which is hollow with a bottom and is inserted into the elastic gasket 2. A slanted wall surface 42 is formed on either the skirt part 41 or the valve housing 3. At the same time, a cantilevered elastic finger piece 32 is provided on the other of the aforementioned hakama portion 41 or the valve housing 3.
Multiple lines are formed. By engaging the finger tips of these elastic fingers 32 with the inclined wall surface 42, the valve stem 4 is elastically supported.

According to the illustrated embodiment, the inclined wall surface 42 is formed on the skirt portion 41 of the valve stem 4, while the elastic fingers 32 are formed on the valve housing 3, but according to the present invention, the opposite is true. to the inclined wall surface 42 to the valve housing 3,
An elastic finger piece 32 may be provided on the valve housing 3. Regarding the latter type of design, for example, the above-mentioned Japanese Patent Publication No.
Please refer to Figure 3 of No. 10686. Note that the term "slanted wall surface" herein is not limited to a slope where the generatrix of the wall surface is a diagonal straight line, but also includes cases where the generatrix of the wall surface is a diagonal curve as shown in the figure. Incidentally, injection devices meeting the requirements described above are known from the above-mentioned publications.

Now, according to the present invention, reference numeral 43 designates the rod portion of the valve stem 4 described above, and this rod portion 43 is formed in a tapered shape, while the rod portion 43 and the skirt portion 41
An annular shelf surface 44 is formed at the connection portion with the. The rod portion 43 described above is fitted into the pipe handle 52 of the push button 5 with the injection port 51, and an annular groove 6 is formed between the end surface 53 of the pipe handle 52 and the shelf surface 44 described above. A valve hole 45 is bored in the pipe wall of the rod portion 43 forming the bottom of the valve 6.

Further, according to the present invention, the annular top wall 12 of the turret portion 11 is formed in the shape of an inverted funnel, and the inner peripheral edge of the elastic gasket 2 made of an annular flat plate brought into close contact with the top wall 12 is connected to the annular top wall 12 of the turret portion 11. While closely contacting the groove 6, its outer peripheral edge is connected to the top wall 12 and the mouth 3 of the valve case.
It is inserted and fixed between 1 and 2.

According to the illustrated embodiment, a recess 54 and a guide groove 55 are formed on the top surface of the push button 5 to receive a filler injection nozzle 7 to be described later, and an introduction hole connected to the guide groove 55 is formed. 56 passes through the push button 5 in the upper and lower directions.

This invention device is constructed as described above, and since the rod portion 43 of the valve stem 4 is simply a tapered tube, there is no need for a vertically divided mold, and not only is it possible to perform cutting molding, but also the above-mentioned practical application is possible. 63−
There are no difficulties in stamping and assembly as proposed in No. 371. Further, according to the present invention, the elastic gasket 2 is composed of an annular flat plate similar to the conventional one, and the top wall 12 is formed in the shape of an inverted funnel at the turret part 11 of the mountain cup.
Due to the fact that the elastic gasket 2 is brought into close contact with the gasket 2, the shaft hole of the elastic gasket 2, which should originally be cylindrical, is deformed into a funnel shape in the close contact state. Then, the end surface 53 of the pipe handle 52 of the push button
Since the inner circumferential edge of the elastic gasket 2 is tightly inserted into the annular groove 6 formed between the shelf surface 44 of the valve stem 4 and the shelf surface 44 of the valve stem 4, the rod portion 43 of the valve stem 4 is inserted into the lower edge of the shaft hole of the elastic gasket 2. is subjected to strong tightening in the radial direction. The above-described valve hole 45 is bored at a position corresponding to the bottom of the annular groove 6, and in this case, the valve hole 45 is naturally located above the portion of the elastic gasket 2 that is subjected to strong tightening as described above. Furthermore, as described above, there is no burr on the circumferential surface of the rod portion 43 of the valve stem 4 that would prevent the valve from coming into close contact with the elastic gasket 2. is completely blocked. Therefore, even if the elastic fingers 32
Even if the elastic supporting force of the valve stem 4 is weak, no leakage occurs from the engagement portion between the elastic gasket 2 and the valve stem 4.

The above-mentioned valve hole 45 can be formed not only by drilling, but also by providing a horizontal punching pin in a cutting die. In the latter case, local burrs may remain in the vicinity of the entrance of the valve hole 45, which is a part of the circumferential surface of the rod portion 43. However, the burr can be easily removed, and even if some deformation occurs in the vicinity of the entrance of the valve hole 45, the rod portion 43 is tightened in a narrow circumferential area below the valve hole 45, so the blocking performance is maintained. There is no impact on

In this way, the device according to the invention
While in the static position shown in the figure, there is no leakage, if the valve stem 4 is pushed down against the elastic support force of the elastic fingers 31 as shown in Fig. 2, the inner peripheral edge of the elastic gasket 2 is pressed down by the tube handle 52 of the push button 5, the center part of the elastic gasket 2 is depressed, and the shaft hole surface is deformed into an inverted funnel shape as shown, and as a result, it opens near the valve hole 45. The filling material is injected from the push button 5 through the annular groove 6 .

However, FIG. 2 depicts an embodiment in which the filling nozzle 7 is pressed against the top surface of the push button 5 to inject the filling material. During this filling, the elastic gasket 2 is depressed by being pushed by the pipe handle 52 of the push button.
Since a cavity 13 is created between the pipe and the top wall 12 of the turret part, the filling material introduced through the introduction hole 56 enters this cavity 13 from around the tube handle 52, and the filling pressure at that time causes the top wall 12 A gap 14 is generated between the top surface of the outer peripheral edge of the elastic gasket, and this gap 14
Then, the liquid is injected through a filling groove 15 provided on the outer periphery of the valve housing 3. During the above-described injection operation, a void space 13 is created in the same manner as during the filling process, but at that time, since there is no external pressure in the void space 13, the outer peripheral edge of the elastic gasket 2 is at the top of the turret part, as when it is at rest. It remains close to the wall 12 and no gap 14 occurs.

(Effects of the Invention) That is, as described above, according to the present invention, the valve stem can be molded by cutting the same as the valve casing, and the molding and the production of the molding die are not accompanied by any difficulties. do not have. In addition, even if the elastic support force of the elastic fingers is inferior to that of a coil spring, the blocking force based on the tightening of the elastic gasket against the valve stem is extremely strong, so the sealing and blocking between the valve chamber and the valve hole is ensured. As a result, it can be expected that as long as normal and simple precautions are taken during production, there will be no leakage. Thus, according to the present invention, the technical perfection of the injection device in which the valve stem is elastically supported by elastic fingers is extremely high, and its performance is exceptionally improved, which simplifies and lowers the cost of producing the aerosol injection device. It is notable that it contributes to

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of the device according to the present invention when it is at rest, FIG. 2 is a vertical cross-sectional view of the main part when filling, FIG. 3 is a plan view of the valve stem, and FIG.
The figure is also a front view, and FIG. 5 is a plan view of the valve housing. 1 is the mountain cup, 11 is the tower part, 1
2 is a top wall, 13 is a cavity, 14 is a gap, 15 is a filling groove, 2 is an elastic gasket, 3 is a valve housing, 31 is a mouth part, 32 is an elastic finger piece, 33 is a valve chamber, 4 is a valve stem, 41 is a hakama part, 42 is a sloped wall surface, 43 is a rod part,
44 is a shelf surface, 45 is a valve hole, 5 is a push button, 51 is an injection port, 52 is a tube handle, 53 is an end surface, 54 is a recess,
55 is a guide groove, 56 is an introduction hole, 6 is an annular groove, and 7 is a nozzle.

Claims (1)

[Claims] 1 A valve housing 3 is connected to the turret part 11 of the mountain cup 1 of the aerosol container via an annular elastic gasket 2.
A slanted wall surface 42 is formed on either the hakama part 41 of the bottomed hollow valve stem 4 inserted into the elastic gasket 2 or the valve housing 3, and the opening part 31 of the valve stem 4 is inserted into the elastic gasket 2. An injection device that elastically supports the valve stem 4 by forming a plurality of cantilevered elastic fingers 32 on one of the other of the three elastic fingers 32 and engaging the finger tips of the elastic fingers 32 with the inclined wall surface 42. In this, the rod portion 43 of the valve stem 4 is formed into a tapered shape, an annular shelf surface 44 is formed at the connection portion between the rod portion 43 and the hakama portion 41, and an injection port 51 is formed.
The rod portion 43 is fitted into the tube handle 52 of the push button 5 with a push button 5, and an annular groove 6 is formed between the end surface 53 of the tube handle 52 and the shelf surface 44, and the rod portion 43 forms the bottom of the annular groove 6. The annular top wall 12 of the turret part 11 is formed in the shape of an inverted funnel, and the inner peripheral edge of the elastic gasket 2, which is an annular flat plate brought into close contact with the top wall 12, is connected to the annular tube wall. An aerosol injection device that is tightly inserted into the groove 6 and whose outer peripheral edge is inserted and fixed between the top wall 12 and the mouth 31.