JPH0532217Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a metering injection device that is attached to the valve end of an aerosol container and injects a metered amount of the contents with each operation.

(Prior Art) Aerosol metering injection valves are comprised of a spring, a movable valve, etc. in a valve cylinder that also serves as a metering chamber, so the metering chamber is small and is not suitable for dispensing a large amount of metered amount.

(Problem to be solved by the invention) The purpose of the invention is to provide a device suitable for dispensing a large volume, which is attached to the valve component side of an aerosol container, and to manufacture it with a simple structure. do.

(Means for Solving the Problems) In order to achieve the above object, the outer cylinder part of the lower part of the push button is attached to the large diameter cylinder part of the upper part of the fixed cylinder whose lower end surface can be fitted and fixed to the valve component side of the aerosol container. A piston tube that connects the push button and the stem of the aerosol container is slidably provided in the center hole of the bottom of the fixed tube, and a piston tube that connects the push button and the stem of the aerosol container is provided in the center hole of the bottom of the fixed tube. A piston is provided that slides in contact with the diaphragm and can freely move up and down, and the piston tube has an upper horizontal hole facing the metering chamber between the piston and the bottom of the fixed tube, and a hole that extends from the metering chamber when the piston tube is lowered. A lower horizontal hole that escapes downward is provided at a predetermined interval vertically, and the upper hole and the lower horizontal hole of the internal hole of the piston pipe are separated by a partition wall, and the lower hole and the upper horizontal hole of the internal hole are separated by a partition wall. It is characterized by the formation of a continuous connection. With this configuration, instead of a small-capacity metering chamber in a valve cylinder, a large-capacity metering injection device can be manufactured with a simple structure, and its use can be expanded.

Below, the drawings showing the embodiments will be explained.
FIG. 1 is a longitudinal cross-sectional view of the injection device attached and fixed to the valve component end of the aerosol container, where A
is a metered-dose injection device, and B is an aerosol container.

The fixed amount injection device A is integrally formed by a fixed cylinder 1, a push button 2, a piston tube 4 and a piston 5 that connect the push button 2 and the stem 3 of the aerosol container B, and a coil spring 6 interposed between the piston 5 and the push button 2. The lower end surface of the fixed cylinder 1 is fitted and fixed onto the valve-forming end of the aerosol container B and set. The fixed cylinder 1 was fixed by providing a small-diameter cylinder part 9 on a bottom plate 8 opening a center hole 7 outside and below the center hole 7, and fitting the small diameter cylinder part 9 into the central bulge on the end side of the valve structure. Above the bottom plate 8 of the fixed cylinder 1 is a large diameter cylinder part 1.
0 is provided and the top opening 10a is opened. The push button 2 connects the lower outer cylinder part 11 to the large diameter cylinder part 10 of the fixed cylinder 1.
and is formed to be able to slide up and down by a predetermined dimension. Reference numeral 11a is a ring-shaped convex portion protruding from the inner circumferential surface of the outer cylinder portion 11, and is a close contact surface with the fixed cylinder 1.
A discharge port 12 is protruded from the upper outer peripheral surface of the push button 2 in a slightly longer manner. The upper end of the piston pipe 4 is connected to the release path 1 of the push button 2.
2a, and attach the lower end to the aerosol container B.
The push button 2 and the aerosol container B are connected by fitting it onto the stem 3 of the button. Further, the piston tube 4 is tightly fitted into the center hole 7 of the bottom plate 8 of the fixed cylinder 1, and elastically slides into contact with the hole edge 7a, so that it can freely slide when the push button 2 is operated. Furthermore, the lower part of the piston pipe 4 is a partition wall 1 that partitions the internal hole.
3, horizontal holes 14 and 15 are opened to the metering chamber 16 at a predetermined interval vertically on the lower outer periphery, and the upper horizontal hole 14 is communicated with the lower hole 4a of the piston pipe 4 to the metering chamber 16. The lower horizontal hole 15 communicates with the upper hole 4b of the piston pipe 4 and serves as a discharge hole from the metering chamber 16. The piston 5 has an outer edge 5a in sliding contact with the inner surface of the fixed cylinder 1 inside the large diameter cylinder part 10 of the fixed cylinder 1, and an inner edge 5b in sliding contact with the outer surface of the piston tube 4 to form a metering chamber 16 inside the fixed cylinder 1. A coil spring 6 is interposed between the piston 5 and the push button 2.

In FIG. 1, the piston 5 is at the bottom dead center due to the coil spring 6, and the metering chamber 16 is minimized, and the two horizontal holes 14 and 15 are opened at this position.

Now, when the push button 2 is pressed down, the piston tube 4 also descends and the lower horizontal hole 15 opens into the metering chamber 16, as shown in FIG.
At the same time, the stem 3 also descends and opens the injection valve in the downward direction, causing the contents to flow into the metering chamber 16 from the upper horizontal hole 14. Under this liquid pressure, the piston 5 resists the coil spring 6. Move upward. When the pressing force of the push button 2 is released, the piston tube 4 rises and the lower horizontal hole 15 is positioned and communicated with the metering chamber 16 again, so that the contents in the metering chamber 16 are discharged through the upper hole 4b of the piston tube 4. As the contents decrease, the piston 5 descends and returns to the state shown in FIG. 1.

(Effects) With the above-described configuration, the present invention can secure a large-capacity metering chamber outside the valve configuration end of the aerosol container, and can expand its use for large-volume dispensing. Moreover, since the structure is simple, it has the advantage of being easy to manufacture and use.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the injection device, and FIG. 2 is a longitudinal sectional view of the injection device when the button is pressed. A...metered injection device, B...aerosol container,
1...Fixed barrel, 2...Push button, 3...Stem, 4...
... Piston pipe, 5 ... Piston, 10 ... Large diameter cylinder section, 13 ... Partition wall, 14 ... Upper horizontal hole, 15 ...
...lower horizontal hole, 16...quantity chamber.

Claims (1)

[Scope of utility model registration request] The lower outer cylinder part 11 of the push button 2 is slidably inserted into the upper large diameter cylinder part 10 of the fixed cylinder 1 whose lower end surface can be fixed to the valve component end side of the aerosol container B, and the bottom plate of the fixed cylinder 1 is inserted. A piston pipe 4 connecting the push button 2 and the stem 3 of the aerosol container B is slidably provided in the center hole 7 passing through the large diameter cylinder part 1 of the fixed cylinder 1.
A piston 5 is formed in the piston tube 4 and the large diameter cylindrical portion 10 so that the inner and outer edges thereof are in sliding contact with the piston tube 4 and the large diameter cylindrical portion 10, respectively, so that the piston 5 can move vertically and reciprocally, and faces the metering chamber 16 between the piston 5 and the bottom plate 8. The piston tube 4 is provided with an upper horizontal hole 14 and a lower horizontal hole 15 that exits downward from the metering chamber 16 when the piston tube 4 descends, at a predetermined interval vertically. The upper hole 4b of the internal hole and the lower horizontal hole 15
Also, the lower hole 4a of the internal hole and the upper horizontal hole 14
A fixed-rate injection device characterized by having a communication structure formed with.