JP4064133B2 - Quantitative valve mechanism for powdered contents, contents filling method and aerosol product - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a powder content metering valve mechanism, a method for filling a content container with a powder content metering valve mechanism, and an aerosol product equipped with a powder content metering valve mechanism.
[0002]
In particular, for powdered contents that closes the sealing action part based on the movement of the stem relative to the housing and discharges the powdery contents of the metering chamber formed downstream of the closed sealing action part to the external space The target is a metering valve mechanism.
[0003]
In this specification, the term “contents” is used to include both the gas for release and the powdery contents as necessary.
[0004]
In the case of a metering valve mechanism that discharges the powdered contents in the metering chamber to the external space, the powdery contents remaining in the metering chamber fall on the seal action part at the initial stage of the process of releasing the contents. In addition, it is desirable to agitate the powdered contents in the metering chamber (powder reservoir) and efficiently discharge them to the external space during the discharging operation, and the present invention meets such a demand. Is.
[0005]
[Prior art]
FIG. 8 shows a conventional quantitative valve mechanism for powdered contents in which a powder reservoir is provided in a quantitative chamber in a housing.
[0006]
In FIG.
30 is a metering valve mechanism,
31 is a stem, 31a is a passage, 31b is a discharge hole, 31c is a lower end,
32 is a housing, 32a is a metering chamber, 32b is an outer cylindrical part, 32c is an inner cylindrical part, 32d is a bottom part,
33 is a powder reservoir for preventing powdered contents from falling from the quantitative chamber 32a to the upstream container side in the non-use mode;
34 is a stem biasing spring mounted in the housing 32;
35 is a gap between the stem 31 and the inner cylindrical portion 32c of the housing 32,
36 is a cup rubber, 36a is a tapered surface of the cup rubber 36,
37 is a narrow portion between the tapered surface 36a of the cup rubber and the lower end portion 31c of the stem,
38 is Bush,
39 is a space between the bush 38 and the cup rubber 36;
40 is a suction pipe,
41 is a stem rubber,
42 is a resin ring,
43 is an outer gasket,
44 is a mountain cap,
45 is a container,
Respectively.
[0007]
As shown in FIG. 8, the bottom portion 32 d of the housing 32 of the metering valve mechanism 30 is provided with an inner cylindrical portion 32 c extending upward along the stem 31, and the outer cylindrical portion 32 b and bottom portion of the housing 32 are provided. A powder reservoir 33 surrounded by 32d and the inner cylindrical portion 32c is formed.
[0008]
In the non-use mode, the stem 31 is urged upward by the spring 34, and the discharge hole 31 b is closed by the stem rubber 41.
[0009]
By the previous stem operation, the contents in the container 45 pass through the narrow portion 37 between the suction pipe 40, the space 39, the tapered surface 36a of the cup rubber 36 and the lower end 31c of the stem 31, and the housing. 32 flows into the metering chamber 32 a of the housing 32 from the gap 35 between the inner cylindrical portion 32 c of 32 and the stem 31.
[0010]
If the metering valve mechanism 30 is left in the non-use mode, the powdered contents in the metering chamber space area move to the lower side of the metering chamber 32a because its specific gravity is larger than the discharged gas component, etc., but forms a powder reservoir 33. So it is housed here. As a result, the powdery contents can be prevented from falling through the gap 35 and the narrow portion 37 to the container 45 side.
[0011]
In the use mode, the stem 31 is lowered against the urging of the spring 34 by pushing down an operation button (not shown), and the discharge hole 31b is released from the stem rubber 41, so that it is stored in the fixed quantity chamber 32a. The contents that have been discharged are ejected to the outside through the discharge hole 31b and the passage 31a of the stem 31.
[0012]
At this time, the lower end portion 31c of the stem 31 is strongly pressed against the taper surface 36a of the cup rubber 36 so that they are in close contact with each other, and the metering chamber 32a of the housing 32 is cut off from the space portion 39. Only the contents stored in the chamber 32a are discharged to the outside.
[0013]
At the end of the operation of the stem in the use mode (at the time of transition from the use mode to the non-use mode), some residual contents that could not be released float inside the fixed quantity chamber 32a due to the effect of the upward movement of the stem 31 It becomes a state.
[0014]
The powdered content in the floating state falls because it has a large specific gravity. The powdery content located above the upper end of the inner cylindrical portion 32c is a gap 35 between the stem 31 and the inner cylindrical portion 32c of the housing 32, or the tapered surface of the lower end portion 31c of the stem and the cup rubber 36. It enters into the narrow space 37 between 36a.
[0015]
[Problems to be solved by the invention]
As described above, in the conventional metering valve mechanism, the residual powder content in the metering chamber space area falls and falls on the seal portion between the stem and the cup rubber when the mode is changed from the use mode to the non-use mode. There is a problem in that it penetrates and adheres, and the stem operation is not smoothly performed, and the sealing performance between the stem and the cup rubber is deteriorated.
[0016]
Therefore, in the present invention, by providing the stem with a shielding portion that prevents the residual powdery content in the fixed chamber space region from falling onto the seal portion, the stem operation is smooth and good sealing performance is maintained. For the purpose.
[0017]
Moreover, it aims at improving the efficiency of the discharge | release process to the external space of the said powdery content by stirring the powdery content of a fixed_quantity | quantitative_assay chamber (powder reservoir) in the case of discharge | release operation | movement.
[0018]
[Means for Solving the Problems]
The present invention solves this problem as follows.
(1) Based on the movement of the stem (for example, the stem 11 in FIG. 1) relative to the housing (for example, the housing 12 in FIG. 1), a sealing action portion (for example, the annular protrusion 11f in FIG. The outer peripheral surface of the annular upright portion 12c is closed, and the powdered contents in the metering chamber formed in the housing on the downstream side of the sealing action portion in the closed state are discharged into the external space. In the metering valve mechanism,
On the bottom surface side of the housing, an annular upright portion (for example, the annular upright portion 12c in FIG. 1) that functions as a passage for the powdery content from the container side is provided while forming a space for storing the powdery content,
A shielding part for blocking the upper space of the sealing action part at the lower end side of the stem so as to face the upper opening of the annular upright part and preventing the powdered contents from falling on the sealing action part (For example, the shielding part 11c in FIG. 1) and an annular hanging part (for example, the annular hanging part 11e in FIG. 1) having an inner circumferential surface facing the outer circumferential surface of the annular upright part downward from the shielding part,
The sealing action part is formed in the form of an intimate action part between the inner peripheral surface part of the annular hanging part and the outer peripheral surface part of the annular upright part on the inner side when the stem moves down,
The shielding part is formed in such a manner that, when the stem moves down and shifts to a use mode, it makes contact with the upper end portion of the annular upright part and exhibits a double sealing action with the sealing action part,
It shall be the thing of an aspect.
(2) Based on the movement of the stem (for example, the stem 11 in FIG. 2) with respect to the housing (for example, the housing 12 in FIG. 2), the sealing action portion (for example, the annular protrusion 12e in FIG. , The outer peripheral surface of the columnar portion 11h) is in a closed state, and the powdered content in the quantitative chamber formed inside the housing on the downstream side of the closed sealing action portion is discharged into the external space. In the valve mechanism,
On the bottom side of the housing, an annular upright portion (for example, the annular upright portion 12c in FIG. 2) that functions as a passage for the powdery content from the container side is provided while forming a space for storing the powdery content,
A shielding part for blocking the upper space of the sealing action part at the lower end side of the stem so as to face the upper opening of the annular upright part and preventing the powdered contents from falling on the sealing action part (For example, the shielding portion 11c in FIG. 2), a columnar portion (for example, the columnar shape in FIG. 2) that extends downward from the shielding portion and enters the internal space region for the passage of the annular upright portion when the stem moves down. Part 11h) and an annular hanging part (for example, annular hanging part 11e in FIG. 2) having an inner peripheral surface facing the outer peripheral surface of the annular upright part downward from the shielding part,
The sealing action part is an aspect of an intimate action part between an inner peripheral surface part below the upper opening of the annular upright part and an outer peripheral surface part of the columnar part on the inner side when the stem is moved downward. Formed with
The shielding portion is formed in a mode in which when the stem moves down and shifts to a use mode, the shielding portion comes into contact with the upper end portion of the annular upright portion and exhibits a double sealing action with the sealing action portion.
It shall be the thing of an aspect.
(3) In (1) and (2) above,
A stirring member for the powdered contents is provided in the quantitative chamber.
(4) In the above (1), (2), (3),
A filling passage (for example, a filling slit 12h in FIG. 6) is formed in the housing from the filling port (for example, the filling port 19a in FIG. 6) to the content storage space of the container without passing through the metering chamber.
(5) In the method for filling contents into an aerosol container provided with the quantitative valve mechanism for powdered contents according to (4) above,
The discharge gas and the powdered contents are filled into the contents storage space from the filling port via the filling passage.
[0019]
According to the present invention, the stem for the powder content metering valve mechanism that discharges the powder content in the metering chamber of the housing to the external space is shielded to prevent the powder content from dropping onto the sealing portion. This prevents the deterioration of the sealing performance of the metering chamber in the use mode of the valve mechanism.
[0020]
In addition, a powder reservoir is formed on the bottom side of the metering chamber, so that the powdered contents when the valve mechanism is in the non-use mode are securely held in the metering chamber.
[0021]
Further, an annular hanging portion is provided on the stem shielding portion so as to surround the outer side of the annular standing portion on the bottom surface side of the housing, and a columnar portion is provided on the shielding portion so as to enter the internal space of the annular standing portion. The release gas from the sealing action part in the initial stage of the use mode of the mechanism (the close part of the annular upright part and the annular hanging part, the close part of the annular upright part and the columnar part: FIGS. 1 to 4) is the bottom of the powder reservoir In this way, the powdered content in the form of a powder reservoir is efficiently discharged to the external space.
[0023]
Moreover, the stirring member of the powdery content of a fixed_quantity | quantitative_assay chamber is provided, and, thereby, the powdery content of a precipitation state is also discharge | released reliably to external space.
[0024]
In addition, a passage for filling the contents without passing through the quantitative chamber is provided in the housing, so that the content filling process can be efficiently performed in a short time even when the content passage in the quantitative chamber is bent. I have to.
[0025]
In addition, the present invention is also directed to an aerosol product that includes the above-described quantitative valve mechanism for powdered contents (1) to (4) and contains a gas for discharge and powdered contents.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
[0028]
FIG. 1 and FIG. 2 are explanatory views showing a quantitative valve mechanism for powdered contents (part 1 and part 2) provided with a function for preventing powdered contents from dropping onto a seal part, and (a) is not used respectively. Mode, (b) shows the use mode.
[0029]
FIG. 3 is an explanatory view showing a modification of the sealing action portion of FIG.
[0030]
FIG. 4 is an explanatory view showing a modification of the sealing action portion of FIG.
[0031]
5A and 5B are explanatory views showing a modification of the annular hanging portion of the stem. FIG. 5A shows a case where the lower end side is a trumpet shape, FIG. 5B shows a case where the lower end side is tapered, and FIG. Each case shows a hemispherical side.
[0032]
FIG. 6 is an explanatory view showing a powder content metering valve mechanism (part 3) having a function of preventing powder content from dropping onto the seal portion, (a) is a non-use mode, and (b) is a use mode. Each mode is shown.
[0033]
FIG. 7 is an explanatory view showing a method of filling a discharge gas into the quantitative valve mechanism for powdered contents of FIG. 1, for example.
[0034]
1 to 7,
1 to 3 are quantitative valve mechanisms for powdered contents,
11 is a stem provided with a shielding part for preventing powdered contents from dropping, 11a is a discharging hole, 11b is a discharging passage, 11c is a shielding part for preventing powdered contents from dropping, 11d is a bottom surface of the shielding part, 11e is an annular hanging portion, 11f is an annular protruding portion formed on the annular hanging portion 11e, 11g is a groove portion formed at the lower end of the annular hanging portion 11e, 11h is a columnar portion, 11j is a passage slit, and 11k is a columnar portion 11h. An annular protrusion formed on the lower end side of
12 is a housing in which an annular upright portion is formed, 12a is an outer cylindrical portion, 12b is a bottom portion, 12c is an annular upright portion, 12d is an upper end portion of the annular upright portion, and 12e is an annular protruding portion formed in the annular upright portion. , 12f is a metering chamber, 12g is a powder reservoir that prevents the powdered contents from falling from the metering chamber 12f to the container 20 in the non-use mode, 12h is a slit for filling gas or powdered contents, 12j Is a passage between the annular raised portion 12c of the housing 12 and the annular protruding portion 11f of the stem 11, 12k is a passage between the annular raised portion 12c of the housing 12 and the columnar portion 11h of the stem 11, and 12m is an annular raised portion. 12c is an inner passage, 12n is an annular protrusion formed on the upper end side of the annular upright portion 12c, 12p is a passage slit,
13 is a stem not provided with a shielding portion for preventing powdered contents from falling, 13a is a bowl-shaped portion, 13b is a discharge hole, 13c is a discharge passage,
14 is a housing in which an annular upright portion is not formed, 14a is an outer cylindrical portion, 14b is a rib on the inner peripheral surface, 14c is a metering chamber, 14d is a powder reservoir surrounded by cup rubber 16 described later, and 14e is Slit for filling gas and powder
15 is a spring for energizing the stem,
Reference numeral 16 denotes a seal rubber for forming the metering chamber 14c and cup rubber which also serves to prevent the powdered contents from falling, 16a is a base, 16b is an annular inner peripheral surface of the base 16a, 16c is an annular inner peripheral surface 16b, the stem 13, and 16d is an opening dome-shaped portion having a returning property toward the stem 13, 16e is an upper end portion of the opening dome-shaped portion, 16f is a gap between the upper end portion 16e and the outer peripheral surface of the stem 13,
17 is a suction pipe,
18 is a stem rubber,
19 is a mountain cap, 19a is a discharge gas filling port between the mountain cap 19 and the stem 11, 19b is a space between the mountain cap 19 and the stem rubber 17,
20 is a container,
Respectively.
[0035]
As shown in FIG. 1, a powder reservoir 12g surrounded by an outer cylindrical portion 12a, a bottom portion 12b and an annular upright portion 12c is formed inside the housing 12 of the quantitative valve mechanism 1 for powdered contents.
[0036]
The stem 11 is provided with the shielding part 11c, so that the powdery content remaining in the downstream space area of the fixed quantity chamber 12f at the time of switching from the use mode to the non-use mode causes the seal portion (the housing 12 It is prevented from falling to the annular upright portion 12c and the annular protruding portion 11f of the stem 11).
[0037]
The stem 11 is accommodated in the housing 12 such that the annular hanging portion 11e enters between the outer cylindrical portion 12a of the housing 12 and the annular upright portion 12c. As a result, the content passage in the powder reservoir 12g is a bent passage having a continuous crank.
[0038]
Due to the formation of the bent passage, in the transition state from the use mode to the non-use mode, even if the powdery content remaining downstream from the lower end portion of the annular hanging portion 11e of the stem 11 falls, the powder reservoir 12g It stays in the space area on the bottom 12b side. That is, the powdery contents are not moved to a seal portion (such as between the annular raised portion 12c of the housing 12 and the annular protruding portion 11f of the stem 11).
[0039]
In this transient state, the residual powdery content between the annular hanging portion 11e of the stem 11 and the annular standing portion 12c of the housing 12 also falls toward the bottom portion 12b of the powder reservoir 12g. That is, it can be said that the seal portion does not move.
[0040]
In the non-use mode of FIG. 1 (a), the stem 11 is moved up by the biasing force of the spring 15 and the discharge hole 11a is closed, so that the metering chamber 12f does not communicate with the external space, and the contents of the metering chamber 12f. Is not released into the external space.
[0041]
On the other hand, a passage 12j is secured between the annular protruding portion 11f of the stem 11 and the annular standing portion 12c of the housing 12, and the inside of the container 20 and the metering chamber 12f communicate with each other.
[0042]
Therefore, the powdered content of the container 20 at a predetermined pressure is transferred to the metering chamber 12f where the pressure has decreased due to the previous discharge operation, the suction pipe 17-the inner passage 12m-passage of the annular upright portion 12c of the housing. It flows in through 12j.
[0043]
If left in this state, the powdered content has a large specific gravity, so it moves to the bottom 12b side of the housing 12 and settles in the powder reservoir 12g including the annular upright portion 12. The powdery content does not fall from the quantitative chamber 12f to the container 20 side.
[0044]
In the use mode of FIG. 1B, by pressing the stem 11 downward against the urging force of the spring 14,
The annular protrusion 11f of the stem 11 is in close contact with the outer peripheral surface of the annular upright portion 12c of the housing 12,
The bottom surface 11d of the shielding portion 11c of the stem 11 is in contact with the upper end portion 12d of the annular upright portion 12c of the housing 12.
[0045]
That is, the metering chamber 12 f is blocked from the inside of the container 20 in a state where the space between the stem 11 and the annular upright portion 12 c of the housing 12 is double-sealed.
[0046]
When the shielding portion 11 c of the stem 11 contacts the annular upright portion 12 c of the housing 12, the lower end portion of the annular hanging portion 11 e of the stem 11 is positioned near the bottom portion 12 b of the housing 12.
[0047]
Further, since the discharge hole portion 11a is opened from the stem rubber 18 and opened, the contents inside the metering chamber 12f are caused by the pressure of the discharge gas between the annular hanging portion 11e of the stem 11 and the annular standing portion 12c of the housing 12. Between the groove 11g and the annular hanging portion 11e of the stem 11 and the outer cylindrical portion 12a of the housing 12 For discharging through the narrow portion between the shielding portion 11c of the stem 11 and the outer cylindrical portion 12a of the housing 12 It passes through the hole 11a and is discharged to the outside from the discharge passage 11b.
[0048]
At this time, the contents and discharge gas in the space between the annular hanging portion 11e of the stem 11 and the annular standing portion 12c of the housing 12 are detoured to the bottom 12b side of the housing 12, and then to the discharge hole portion 11a. And move.
[0049]
Therefore, the powdery contents remaining in the bottom side portion of the powder reservoir 12g are agitated by the detoured flow of the release gas that moves from the upstream side of the bottom side portion, and the discharge hole portion. It is forcedly and reliably pushed to 11a and released into the external space.
[0050]
When the pressing operation of the stem 11 is stopped, the stem is moved up by the urging force of the spring 15 to return to the non-use mode of (a).
[0051]
In the returning process, the powdery contents slightly remaining in the fixed quantity chamber 12f are in a floating state due to the influence of the movement of the stem 11, but drop due to the large specific gravity.
[0052]
At this time, the powdered contents are formed between the double seal portion between the stem 11 and the annular upright portion 12c of the housing 12 (the annular protruding portion 11f of the stem 11 and the outer peripheral surface of the annular upright portion 12c of the housing 12). It does not fall on the close contact target part and the contact target part between the bottom surface 11 d of the shielding part 11 c of the stem 11 and the upper end part 12 d of the annular upright part 12 c of the housing 12. This is because the stem 11 is provided with the shielding portion 11c and the annular hanging portion 11e.
[0053]
That is, under the stem 11 provided with the shielding part 11c and the annular hanging part 11e, in order for the residual powdery content in the metering chamber 12f to reach this double seal portion, the residual powdery content passes through the passage 12j. This is because it has to move upward. There is virtually no such uplift.
[0054]
Therefore, the residual powdery content adheres to a close contact portion between the annular protrusion 11f of the stem 11 and the annular standing part 12c of the housing 12, and the sealing action between the annular protrusion 11f and the housing 12 is achieved. Does not slow down.
[0055]
Instead of the annular projection 11f of the stem 11, an annular projection may be formed on the outer peripheral surface of the annular upright portion 12c of the housing 12.
[0056]
The main difference between the metering valve mechanism 2 in FIG. 2 and the metering valve mechanism 1 in FIG. 1 is that a metering chamber forming seal portion is provided on the inner peripheral surface side of the annular upright portion 12 c of the housing 12.
[0057]
That is, an annular protrusion 12e is formed on the inner peripheral surface of the annular upright portion 12c of the housing 12, and a columnar portion 11h that seals between the protrusion 11 is formed on the stem 11. The stem 11 includes a shielding part 11c and an annular hanging part 11e, and this point is the same as that of the metering valve mechanism 1.
[0058]
As shown in FIG. 2A, in the non-use mode, the discharge hole 11a is closed, and a passage 12k is formed between the annular protrusion 12e of the housing 12 and the columnar portion 11h of the stem 11.
[0059]
Therefore, as in the metering valve mechanism 1 of FIG. 1, the powdered contents in the container 20 flow into the metering chamber 12f via the suction pipe 17-the inner passage 12n of the annular upright portion 12c of the housing-the passage 12k. To do.
[0060]
Further, as described above, this powdery content is settled in the powder reservoir 12g surrounded by the annular upright portion 12c.
[0061]
As shown in FIG. 2B, in the use mode,
The stem 11 is pressed against the urging force of the spring 14,
The columnar portion 11h of the stem 11 is in close contact with the protruding portion 12e of the housing 12,
The bottom surface 11 d of the shielding part 11 c of the stem 11 contacts the upper end part 12 d of the annular upright part 12 c of the housing 12.
[0062]
By this close contact action and contact action, the metering chamber 12f of the housing 12 is shut off from the container 20 side in a double seal state.
[0063]
At this time, the lower end portion of the annular hanging portion 11 e of the stem 11 is positioned in the vicinity of the bottom portion 12 b of the housing 12.
[0064]
In addition,
-Release path to the external space of the contents (gas for discharge and powdered contents) of the quantitative chamber 12f when the discharge hole 11a is opened
-Stirring action on the powdered contents staying near the bottom of the powder reservoir 12g based on the detour flow (downward to upward) of the release gas from the inside to the outside of the annular hanging portion 11e at the time of release
These are the same modes as the metering valve mechanism 1 of FIG.
[0065]
Further, when the pressing operation of the stem 11 is stopped and the use mode of (b) is returned to the non-use mode of (a), the state of the falling powdery contents in the metering chamber 12f is also shown in FIG. It is the same as the case of.
[0066]
That is, this residual powdery content is a double seal portion between the stem 11 and the annular upright portion 12c of the housing 12 (the close contact between the peripheral surface of the columnar portion 11h of the stem 11 and the annular protruding portion 12e of the housing 12). The target part and the contact target part between the bottom surface 11d of the shielding part 11c of the stem 11 and the upper end part 12d of the annular upright part 12c of the housing 12 are not dropped. This is because the stem 11 is provided with the shielding portion 11c and the annular hanging portion 11e.
[0067]
Therefore, this residual powdery content adheres to a close contact portion between the columnar part 11h of the stem 11 and the annular projecting part 12e of the housing 12, and the like, and the stem 11 and the annular projecting part 12e of the housing 12 It does not occur that the sealing action becomes slow.
[0068]
Instead of the annular projecting portion 12e of the housing 12, an annular projecting portion may be formed on the peripheral surface of the columnar portion 11h of the stem 11.
[0069]
The metering valve mechanism for powdered contents in FIG. 3 shows a non-use mode. At this time, the powdery contents of the container 20 flows into the fixed chamber space through the path of the suction pipe 17-the passage slit 11j of the stem 11 as in the case of FIG.
[0070]
The seal action part in the use mode with the stem 11 pushed down is
A close contact portion between the bottom surface 11d of the blocking portion 11c of the stem 11 and the upper end portion 12d of the annular upright portion 12c of the housing 12
-Both the inner peripheral surface (above the passage slit 11j) of the annular hanging portion 11e of the stem 11 and the intimate portion of the annular protruding portion 12n on the upper end side of the annular standing portion 12c of the housing 12.
[0071]
The metering valve mechanism for powdered contents in FIG. 4 shows a non-use mode. At this time, the powdery contents of the container 20 flows into the fixed-quantity chamber space through the passage of the suction pipe 17 and the passage slit 12p of the housing 12 as in the case of FIG.
[0072]
The seal action part in the use mode with the stem 11 pushed down is
A close contact portion between the bottom surface 11d of the blocking portion 11c of the stem 11 and the upper end portion 12d of the annular upright portion 12c of the housing 12
A close contact portion between the annular protrusion 11k on the lower end side of the columnar portion 11h of the stem 11 and the inner peripheral surface (below the passage slit 12p) of the annular standing portion 12c of the housing 12
Both.
[0073]
A groove 11g serving as a passage for powdered contents is formed at the lower end of the annular hanging portion 11e of each stem in FIG.
[0074]
The metering valve mechanism 3 in FIG. 6 is provided with a cup rubber 16 as a unidirectional valve.
[0075]
By providing this cup rubber,
-Form a powder reservoir 14d,
-And the powdery content in the fixed_quantity | quantitative_assay chamber 14c is prevented from falling to a seal | sticker part (between the outer peripheral surface of the stem 13 and the inner peripheral surface 16b of the cup rubber 16).
[0076]
The cup rubber 16 has an open dome-shaped portion 16d, and the upper end portion 16e acts as a unidirectional valve that opens only in the upward direction in the figure by pressure from the container 20 side.
[0077]
The existing stem 13 and housing 14 of the metering valve mechanism 3 can be used as they are.
[0078]
As shown in FIG. 6 (a), in the non-use mode, the stem 13 is moved up by the biasing force of the spring 15 and the discharge hole 13b is closed, so that the powdery contents in the metering chamber 14c are external. It is not released into space.
[0079]
On the other hand, the stem 13 is located above the inner peripheral surface 16b of the cup rubber 16, and a passage 16c is formed between them.
[0080]
Therefore, the powdered content of the predetermined pressure (upstream from the cup rubber 16) of the container 20 is transferred to the suction tube 17-passage 16c- toward the fixed-quantity chamber 14c where the pressure has decreased due to the previous discharge operation. It flows in through the gap 16f.
[0081]
The gap 16f is formed when the upper end portion 16e of the cup rubber 16 is opened outward (in a direction away from the stem) by the pressure of the discharge gas on the upstream side of the container 20.
[0082]
If the powdered contents are left in a stable state after the inflow, the specific gravity of the powdered contents falls to the powder reservoir 14d of the housing 14; however, the powdered contents are not sealed in the seal portion (the outer peripheral surface of the stem 13 and the cup rubber 16). The possibility of moving to the inner peripheral surface 16b is extremely low.
[0083]
In a stable state in which a predetermined amount of powdered content has flowed into the metering chamber 14c, that is, in a state where the pressures in the metering chamber 14c and the container 20 side are the same, an open dome-shaped portion 16d (upper end portion) 16e) strongly contacts the columnar portion 13a of the stem 13 by its own elastic restoring force.
[0084]
Therefore, even if the powdered content having a large specific gravity moves below the fixed amount chamber 14c, the powdered content is prevented from falling to the container 20 side by the contact of the cup rubber 16 with the stem 13.
[0085]
When an operation button (not shown) is pressed in the non-use mode of FIG. 6A, the stem 13 moves downward in the figure against the spring 15, and the stem 13 and the inner peripheral surface 16b of the cup rubber 16 are brought into close contact with each other. (B) Use mode. And the fixed_quantity | quantitative_assay chamber 14c is interrupted | blocked from the upstream of the cup rubber 16 reliably.
[0086]
Further, the discharge hole 13b of the stem 13 is opened, and the powdered contents in the fixed-quantity chamber 14c are discharged to the external space via the discharge hole 13b and the discharge passage 13c by the action of the discharge gas. .
[0087]
When the pressing operation of the stem 13 is stopped, the stem is moved up by the urging force of the spring 15 to return to the non-use mode of (a).
[0088]
In this returning process, the powdery contents slightly remaining in the fixed quantity chamber 14c are in a floating state due to the influence of the movement of the stem 13, but due to the large specific gravity, they eventually fall to the cup rubber 16 side.
[0089]
This residual powder content does not fall to the seal portion (between the outer peripheral surface of the stem 13 and the inner peripheral surface 16b of the cup rubber 16).
[0090]
that is,
In the initial stage of the return process to the non-use mode, the upper end portion 16e remains in close contact with the outer peripheral surface of the stem 13 (in use mode) by the elastic return force of the opening dome-like portion 16d of the cup rubber 16.
In the subsequent stage where this close state is released by the pressure of the discharge gas on the container side (upstream side of the cup rubber 16), the residual powdery contents in the metering chamber 14c are subjected to upward force by the action of the pressure. Receive
Because.
[0091]
Therefore, the residual powdery contents in the fixed-quantity chamber 14 c in the switching from the use mode to the non-use mode adhere to the inner peripheral surface of the cup rubber 16, and the sealing action between the inner peripheral surface and the outer peripheral surface of the stem 13. Will never become sluggish.
[0092]
In the powder content metering valve mechanism of FIGS. 1, 2, 3, 4, and 6, a stirring member for the powder content in the metering chamber (powder reservoir) may be provided.
[0093]
The shape and structure of the stirring member is arbitrary, and for example, a cylindrical member, a coiled spring, a ball-shaped member, or the like is used. By vigorously stirring the powdered contents in the quantitative chamber (powder reservoir) with this stirring member by shaking the container before use, the powdered contents can be efficiently released to the external space. it can.
[0094]
In the case of the quantitative valve mechanism for powdered contents shown in FIGS. 1 to 4, the agitation based on the detour flow (downward to upward) of the discharge gas from the inside to the outside of the annular hanging part 11e of the stem 11 is performed. Combined with action.
[0095]
With reference to FIG. 7, a state when filling the quantitative valve mechanism 1 for powdery contents of FIG. 1 with a gas for discharge or powdered contents will be described. Needless to say, this filling method can also be applied to the quantitative valve mechanism for powdered contents shown in FIGS. 2, 3, 4 and 6.
[0096]
A slit 12h is formed in the housing 12 of the quantitative valve mechanism 1 for powdered contents. This is a slit for directly filling the inside of the container 20 with the gas for discharge and the powdered contents without passing through the bent in-housing passage from the filling port to the inner passage 12m.
[0097]
During filling, the stem 11 is pushed down by the action of the filling gas, and a space portion 19 b is formed between the stem rubber 18 and the mountain cap 19.
[0098]
The discharge gas and the powdery contents are filled into the container 20 through the filling port 19a, the space 19b, and the slit 12h. In addition, you may fill with the stem 11 forcedly pressed down.
[0099]
At this time, since the curved passage inside the housing 12 is not used, the discharge gas and the powdered contents can be efficiently filled in a short time.
[0100]
The meaning of this filling method in the quantitative valve mechanism 3 for powdered contents in FIG. 6 is that the one-way valve member (open dome-shaped part) that is always closed with respect to the filling direction is a passage for the powdered contents. In other words, it can be efficiently filled in a short time by a path different from the path having the one-way valve member.
[0101]
Applications of aerosol products using the quantitative valve mechanism for powdered contents as described above are antiperspirants, repellents, pharmaceuticals, quasi drugs, cosmetics, and the like.
[0102]
As the powdered content (powder), metal salt powder, inorganic powder, resin powder and the like are used. For example, talc, kaolin, aluminum hydroxychloride (aluminum salt), barium sulfate, cellulose, and a mixture thereof.
[0103]
As the release gas, LPG, dimethyl ether, fluorocarbon, carbon dioxide gas, nitrogen gas, compressed air, oxygen, rare gas, a mixed gas thereof or the like is used.
[0104]
【The invention's effect】
In this way, the present invention prevents the powdered content from dropping onto the seal action portion on the stem of the powdered content metering valve mechanism that discharges the powdered content in the metering chamber of the housing to the external space. Therefore, it is possible to prevent deterioration of the sealing performance of the metering chamber in the use mode of the valve mechanism.
[0105]
In addition, since the powder reservoir is formed on the bottom side of the metering chamber, the powdered contents when the valve mechanism is in the non-use mode can be reliably held in the metering chamber.
[0106]
Further, an annular hanging portion is provided on the stem shielding portion so as to surround the outer side of the annular standing portion on the bottom side of the housing, and a columnar portion is provided on the shielding portion so as to enter the internal space of the annular standing portion. Gas for release from the sealing portion at the initial stage of use mode of the valve mechanism (close part between the annular upright part and the annular hanging part, close part between the annular upright part and the columnar part: FIGS. 1 and 2) Can act on the powdery content at the bottom of the powder reservoir, so that the powdered content precipitated in the powder reservoir can be efficiently discharged to the external space.
[0107]
Also, in the flow direction of the powdered contents (opposite to the falling direction) on the downstream side of the sealing portion of the metering valve mechanism for the powdered contents that discharges the powdered contents in the metering chamber of the housing to the external space On the other hand, since the one-way valve member that is in an open state is provided, it is possible to prevent the powder content from falling to the sealing action part in the transitional period and the use mode from the use mode to the non-use mode. .
[0108]
In addition, since the stirring member for the powdered content in the quantitative chamber is provided, the powdered content in the precipitated state can be reliably discharged into the external space.
[0109]
Also, since the housing is provided with a passage for filling the contents without going through the quantitative chamber, the content filling process can be efficiently performed in a short time even when the content passage in the quantitative chamber is bent. Can do.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory view showing a powder content metering valve mechanism (part 1) having a function of preventing powder content from dropping to a seal portion according to the present invention, (a) is a non-use mode, (b ) Indicates the use mode.
FIG. 2 is an explanatory view showing a powder content metering valve mechanism (part 2) having a function of preventing powder content from dropping to a seal portion according to the present invention, (a) is a non-use mode, (b) ) Indicates the use mode.
FIG. 3 is an explanatory view showing a modification of the sealing action portion of FIG. 1 according to the present invention.
4 is an explanatory view showing a modification of the sealing action portion of FIG. 2 according to the present invention.
5A and 5B are explanatory views showing a modification of the annular hanging portion of the stem of the present invention, in which FIG. 5A shows a case where the lower end side is made into a trumpet shape, FIG. 5B shows a case where the lower end side is made into a taper shape, c) shows a case where the lower end side is hemispherical.
FIG. 6 is an explanatory view showing a powder content metering valve mechanism (part 3) having a function of preventing powder content from dropping to a seal portion according to the present invention, (a) is a non-use mode, ( b) shows each use mode.
7 is an explanatory view showing a method of filling a discharge gas into the quantitative valve mechanism for powdered contents of FIG. 1 according to the present invention.
FIG. 8 is an explanatory view showing a conventional quantitative valve mechanism for powdered contents in which a powder reservoir is provided in a quantitative chamber in a housing.
[Explanation of symbols]
1: Metering valve mechanism for powdered contents (Part 1)
2: Metering valve mechanism for powdered contents (Part 2)
3: Metering valve mechanism for powdered contents (Part 3)
11: Stem
11a: Hole for discharge
11b: Release passage
11c: shielding part
11d: bottom surface of the shielding part
11e: Annular hanging part
11f: annular protrusion
11g: Groove
11h: Columnar part
11j: Passage slit
11k: annular protrusion on the lower end side
12: Housing
12a: outer cylindrical part
12b: bottom
12c: An annular upright part
12d: Upper end of the annular upright
12e: annular protrusion
12f: Determination chamber
12g: Powder reservoir
12h: Filling slit
12j: passage
12k: passage
12m: Inside passage
12n: An annular protrusion on the upper end side
12p: Passage slit
13: Stem
13a: bowl-shaped part
13b: discharge hole
13c: Release passage
14: Housing
14a: outer cylindrical part
14b: Ribs formed on the inner peripheral surface
14c: Determination chamber
14d: Powder reservoir
14e: slit
15: Spring
16: Cup rubber
16a: base
16b: annular inner peripheral surface
16c: passage
16d: Open dome-shaped part
16e: upper end
16f: gap
17: Suction pipe
18: Stem rubber
19: Mountain cap
19a: Gas filling port for discharge
19b: Space part
20: Container

Claims (6)

Sealing action part between the housing and the stem is closed on the basis of the movement of the stem relative to the housing, powdery contents of quantitation chamber formed inside the downstream side of the housing of the sealing action of the closed in powdery contents for metered valve mechanism but that will be released to the outside space,
On the bottom side of the housing, while forming a space area for storing the powdered contents, provided with an annular upright portion that acts as a passage for the powdered contents from the container side,
A shielding part for blocking the upper space of the sealing action part at the lower end side of the stem so as to face the upper opening of the annular upright part and preventing the powdered contents from falling on the sealing action part And, an annular hanging portion having an inner peripheral surface facing the outer peripheral surface of the annular upright portion is provided below the shielding portion downward,
The sealing action part is formed in the form of an intimate action part between the inner peripheral surface part of the annular hanging part and the outer peripheral surface part of the annular upright part on the inner side when the stem moves down,
The shielding portion is formed in such a manner that, when the stem moves down and shifts to a use mode, the shielding portion abuts on the upper end portion of the annular upright portion and exhibits a double sealing action with the sealing action portion. ,
This is a quantitative valve mechanism for powdered contents. Sealing action part between the housing and the stem is closed on the basis of the movement of the stem relative to the housing, powdery contents of quantitation chamber formed inside the downstream side of the housing of the sealing action of the closed in powdery contents for metered valve mechanism but that will be released to the outside space,
On the bottom side of the housing, while forming a space area for storing the powdered contents, provided with an annular upright portion that acts as a passage for the powdered contents from the container side,
A shielding part for blocking the upper space of the sealing action part at the lower end side of the stem so as to face the upper opening of the annular upright part and preventing the powdered contents from falling on the sealing action part , A columnar portion that extends downward from the shielding portion and enters the internal space area for the passage of the annular upright portion when the stem is moved down, and a lower portion of the annular upright portion that extends downward from the shielding portion. An annular hanging part having an inner peripheral surface facing the outer peripheral surface is provided,
The sealing action part is an aspect of an intimate action part between an inner peripheral surface part below the upper opening of the annular upright part and an outer peripheral surface part of the columnar part on the inner side when the stem is moved downward. Formed with
The shielding portion is formed in such a manner that when the stem moves down and shifts to a use mode, the shielding portion abuts on the upper end portion of the annular upright portion and exhibits a double sealing action with the sealing action portion. ,
This is a quantitative valve mechanism for powdered contents. In the quantitative chamber , a stirring member for powdered contents was provided.
The metering valve mechanism for powdered contents according to claim 1 or 2. A passage for filling from the filling port to the content storage space of the container without passing through the metering chamber is formed in the housing.
The quantitative valve mechanism for powdered contents according to any one of claims 1 to 3. In the method for filling contents into an aerosol container provided with the quantitative valve mechanism for powdered contents according to claim 4,
Release gas and powder content is filled into the contents receiving space from the filling port by way of the filling passage,
The content filling method characterized by the above-mentioned.   An aerosol product comprising the quantitative valve mechanism for powdered contents according to any one of claims 1 to 4, and containing a release gas and powdered contents.

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