JPH0433766Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a foam-jetting container containing shaving cream or the like.

``Prior Art'' Conventionally, in this type of container, foam-like substances in the container body are pushed down by pressing down a push-down head which is vertically movable and protrudes in an upwardly biased state via a stem. There are some that are designed to eject from a nozzle installed in the.

``Problem that the invention aims to solve'' By the way, in the case of the conventional container as mentioned above, in order to stop the ejection of foam, the push-down head is released and the discharge valve in the stem is closed. However, due to the residual pressure in the discharge passage downstream of the discharge valve, the foam is still discharged from the nozzle, staining the area around the nozzle and being wasted.

Therefore, the present invention provides another discharge valve with a check valve mechanism in the discharge passage downstream of the discharge valve, and confines the foam corresponding to the residual pressure in the discharge passage, thereby preventing the foam from spouting out. The purpose is to reduce the discharge amount as much as possible by the residual pressure of the foam after stopping.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides an aerosol type in which the stem 7 is vertically movable and erected in an upwardly biased state by penetrating the top wall at the upper end of the body 6. The lower inner surface of the small diameter cylindrical portion 8 is fitted into the foam discharge container main body 1 and the upper outer surface of the stem, and the large diameter cylindrical portion 10 is raised upward from the upper end of the small diameter cylindrical portion via the stepped portion 9. a small diameter cylindrical piston 12 attached to the outer periphery of the lower end of the pipe part 11 inside the small diameter cylindrical part 8, and a large diameter cylindrical piston 12 attached to the outer periphery of the upper end of the pipe part inside the large diameter cylindrical part 10 The pistons 13 are fitted together, the valve body 14 is made to stand up from the upper end of the pipe, and the inside of the small-diameter cylinder part and the inside of the large-diameter cylinder part above the large-diameter cylindrical piston are communicated through the pipe hole 15 to achieve the above-mentioned discharge. A sliding member 3 mounted to be vertically movable with respect to the pipe, a spring 4 urging the sliding member upward, and a peripheral wall 17 hanging from the top wall 16 on the outer surface of the large diameter cylindrical portion. It is characterized by comprising a push-down head 5 having a nozzle 19 which is fitted into the lower surface of the top wall and communicates with the valve hole 18 which is opened and closed by the valve body.

"Operation" When the push-down head 5 is pushed down, the stem 7 is also pushed down at the same time, and the discharge valve in the stem 7 is opened.

As a result, the foam is discharged from the container body 1 and passes through the stem 7, the small-diameter cylinder part 8, and the tube hole 15 into the large-diameter cylinder part 10 above the large-diameter cylinder piston 13, that is, into the piston upper chamber A. Supplied.

Thereafter, the piston upper chamber A is pressurized, the sliding member 3 moves down against the force of the spring 4 due to the difference in pressure receiving area, and the valve body 14 opens the valve hole 18.

As a result, the foam inside the piston upper chamber A is ejected through the valve hole 18 and the nozzle 19.

On the other hand, when the push-down head 5 is released to stop the ejection of the foam, the stem 7 rises and the discharge valve in the stem closes.

As a result, the discharge of the foam from the container body 1 is cut off and the pressure in the piston upper chamber A decreases, so the sliding member 3 is instantly raised by the force of the spring 4.
Valve body 14 closes valve hole 18 .

As a result, bubbles corresponding to the residual pressure are sealed in the piston upper chamber A, the pipe hole 15, the small-diameter cylindrical portion 8, and the stem 7 upstream of the valve body 14.

"Example" Embodiments of the present invention will be described based on the drawings.

In the configuration shown in the figure, a downward step 20 is formed on the lower inner surface of the small diameter cylindrical portion 8 of the discharge pipe 2, and the downward step 20 engages with the upper end surface of the stem 7.

The small diameter cylindrical piston 12 in the sliding member 3 is
The pipe portion 11 is formed into a tapered cylindrical shape with a large diameter extending downward from the lower end. In addition, large diameter cylindrical piston 1
3 is formed by forming an elastic section 22 having an arcuate cross section at the periphery of a substrate 21 attached to the outer periphery of the upper end of the tube section, and pressing this elastic section into contact with the inner surface of the large diameter cylindrical section 10 so as to be able to move up and down.

Further, the valve body 14 in the sliding member 3 has a rod-shaped lower part connected to the tube hole 15 of the tube portion 11.
It is fitted inside. Further, the valve body 14 is provided with a communication hole 23 that communicates the piston upper chamber A and the tube hole 15.

From the lower surface of the top wall 16 of the push-down head 5 is a valve hole 18.
A convex portion 24 is provided protrudingly provided, and on the lower outer surface of the convex portion, the upper inner surface of the large diameter cylindrical portion 10 is provided with an engaging means 25 having uneven stripes.
It is fitted in such a way that it cannot be pulled out.

Further, the nozzle 19 is integrally formed on the front wall portion of the peripheral wall 17.

In the above embodiments, each part is molded and manufactured from a synthetic resin material as appropriate.

``Effect of the invention'' Since the present invention has the above-described configuration, as described in the ``effect'' column, the sliding member 3 is connected to the large diameter cylindrical piston 1.
3. Only when the pressure inside the upper large-diameter cylindrical portion 10 increases to a certain level or higher, the valve body 14 automatically lowers and closes to the valve hole 1.
8 and automatically rises due to the drop in the high pressure state, the valve body 14 closes the valve hole 18, and is pushed almost simultaneously with the check valve of the container body provided on the lower side of the stem 7. The valve hole 18 opened on the lower surface of the top wall of the lowering head can be opened and closed, and the foam in the discharge passage up to the valve hole 18 is sealed in the passage, and the amount of foam discharged due to residual pressure is reduced. can be kept to a minimum.

[Brief explanation of drawings]

The figure is a side view of a main part showing an embodiment of the present invention, with a part thereof being shown in cross section. DESCRIPTION OF SYMBOLS 1... Container body, 2... Discharge pipe, 3... Sliding member, 4... Spring, 5... Push-down head.

Claims (1)

[Scope of utility model registration request] An aerosol foam dispensing container main body 1 has a stem 7 which penetrates the top wall of the upper end of the body 6 and is erected in an upwardly biased state, and a lower part of the small diameter cylindrical part 8 is attached to the outer surface of the upper part of the stem. A discharge pipe 2 having an inner surface fitted therein and a large diameter cylindrical part 10 erected upward from the upper end of the small diameter cylindrical part via a stepped part 9, and a pipe part 11 attached to the lower end outer periphery of the small diameter cylindrical part 8. The small diameter cylindrical piston 12 is attached to the outer periphery of the upper end of the pipe inside the large diameter cylindrical part 10.
At the same time, the valve body 14 is made to stand up from the upper end of the pipe part, and the inside of the small diameter cylinder part and the inside of the large diameter cylinder part above the large diameter cylindrical piston are communicated through the pipe hole 15, and the discharge pipe is connected to the valve body 14. A sliding member 3 mounted to be vertically movable, a spring 4 that urges the sliding member upward, and a peripheral wall 17 extending vertically from the top wall 16 on the outer surface of the large diameter cylinder are fitted. and a push-down head 5 having a valve hole 18 opened and closed by the valve body formed in the lower surface of the top wall and having a nozzle 19 communicating with the valve hole.