JPH0224792Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" The present invention relates to a foam/liquid switching pump.

``Prior art'' As a conventional liquid injection pump, for example, a vertical pump mechanism is installed inside the container body by a mounting tube fitted to the neck of the container body, and the lower part is fitted to the vertical pump mechanism. It is known that an injection head communicating with the injection head is fitted into the upper part of the mounting cylinder so as to be vertically movable. This pump has the above-mentioned configuration, and when the injection head is pushed down, the vertical pump mechanism is activated and injects the liquid inside the container from the nozzle cylinder attached to the injection head.It has a foam injection pump and a mist injection pump. Each pump has a different injection head.

``Problem to be solved by the invention'' Conventionally, different pumps have to be used depending on the desired shape of the liquid to be injected, which is cumbersome.

Therefore, the present invention eliminates the above-mentioned drawbacks of the prior art by making it possible to switch between foam and liquid by simply rotating a switching knob provided at the rear of the injection head.

"Means for Solving the Problems" A cylinder 3 installed inside the mouth of a container body 1 through a mounting member 2 has a lower end fixedly communicated with a cylindrical piston 10 inside the cylinder 3, and a nozzle pipe 7 at the upper end. A stem 9 with which an injection head 8 having a
is urged upward by a return spring 11 so as to be able to move up and down, and the liquid injection system includes a suction valve 6 at the bottom of the cylinder 3 and a discharge valve 12 at the piston 10, and the stem 9. A bellows pump 14 having an intake valve 18 at the bottom thereof is disposed between the lower surface of the injection head 8 and the upper surface of the mounting member 2, and the inside of the bellows pump 14 is connected to the injection head 8 via a discharge valve 22 on one side. An air supply system that communicates with the liquid discharge passage 19 and has an exhaust passage 20 that leads directly to the outside on the other side, and the liquid discharge passage 1.
9 and the porous material 21 provided in the 20 communication passages of the exhaust passage.
and a switching point 24 which is inserted into the exhaust passage 20 from the top surface of the injection head 8, and which selects the air supply from the bellows pump 14, which is rotated in conjunction with liquid injection, to the porous material 21 side or directly to the outside. It has a structure consisting of.

"Operation" Next, the operation of the above pump will be explained. For convenience of explanation, it is assumed that the cylinder 3 is filled with liquid sucked up through the suction valve 6, and the bellows pump 14 is filled with air sucked through the intake valve 18.

When the liquid in the container body 1 is to be injected as a liquid from the above state, the through hole 25 is communicated with the outlet side of the exhaust passage 20 by operating the switching knob 24 as shown in FIGS. 1b and 3. Thereafter, the piston 10 is pushed down by the injection head 8 through the stem 9 against the spring 11. Then, since the upper end opening of the piston 10 is sealed by the discharge valve 12, the hydraulic pressure inside the cylinder 3 increases due to the downward movement, and when this hydraulic pressure reaches a specified value, the discharge valve 12 is pushed upward. The high-pressure liquid in the cylinder 3 is then injected from the gap between the discharge valve 12 and the stem 9 through the discharge passage 19 and the porous material 21 to the outside from the nozzle pipe.
On the other hand, the air inside the bellows pump 14, which has been compressed by the pressing down, is exhausted to the outside through the discharge valve 22, through the through hole 25, and through the exhaust path 20.

When the pressing operation is stopped at the time when the liquid injection is finished, each part returns to the state shown in the figure due to the return action of the spring 11. At this time, the inside of the cylinder 3 and the bellows pump 14 become negative pressure, so that the cylinder 3 has no pressure. Liquid flows in through the suction valve 6, air is sucked into the bellows pump 14 through the suction valve 18, and one cycle of the injection operation is completed.

Next, when injecting as foam from the above state,
By operating the switching knob 24, the through hole 26 is communicated with the passage on the porous material 21 side of the exhaust passage 20, and the injection head 8 is similarly pushed down. Then, the liquid is injected through the same passage as described above, but the air from the bellows pump 14 is not directly discharged to the outside, but is supplied from the discharge valve 22 to the porous material 21 through the through hole 26, so that the porous material Air is mixed with the liquid injected at 21, forms bubbles, and is injected from the nozzle pipe 7 to the outside.

When the pressing operation is stopped when the foam injection is completed, one cycle of the injection operation is completed in the same manner as the liquid injection described above.

``Embodiments'' Embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure, 1 is a container body containing liquid, 2 is a cap-shaped mounting member that is liquid-tightly fitted to the mouth of the container body 1 by screwing, etc., and the upper end surface of this mounting member 2 has a small diameter. It's open. A vertically long cylindrical cylinder 3 whose upper end is fixed to the inner wall of the mounting member 2 is suspended in the mounting member 2, and a small diameter bottom 4 at the lower end of the cylinder 3 is suspended into the liquid. The suction pipe 5 is fixed. A suction valve 6 is provided at the upper end opening of the suction pipe 5. This suction valve 6 is made of a cup-shaped elastic material with a tongue-shaped valve section cut into the bottom wall.

A stem 9 having an injection head 8 fixedly communicated with the upper end thereof is inserted into the opening of the mounting member 2 so as to be movable up and down. The injection head 8 has a nozzle tube 7. The lower end portion of the stem 9 inside the mounting member 2 is enlarged in diameter, and this enlarged diameter portion prevents the stem 9 from slipping out from the mounting member 2. An upper portion of a cylindrical piston 10 that slides within the cylinder 3 is fixed to the inner surface of the enlarged diameter portion at the lower end of the stem 9.
A spring 11 is inserted between 0 and the suction valve 6,
This spring 11 pushes up the stem 9, the injection head 8, etc. via the piston 10. A spherical discharge valve 12 is loosely fitted into the upper end opening of the piston 10 to seal this opening.
is configured such that it does not move upward beyond the inner narrow diameter portion 13 of the stem 9 above it.

Reference numeral 14 designates a bellows pump, the upper end opening of which is airtightly fixed to the circumferential wall of the lower surface of the injection head 8, the lower end closing portion 15 being fixed to the upper surface of the mounting member 2 by appropriate means, and the stem 9 penetrating portion of this closing portion 15 being fixed to the upper surface of the mounting member 2. is hermetically sealed with an O-ring 16. Further, an intake hole 17 is formed in a part of the closing portion 15, and an intake valve 18 is made of an elastic material and has a tongue-shaped valve portion formed on the upper surface of the intake hole 17.

The injection head 8 is arranged above the vertical part of the hook-shaped discharge passage 19 communicating the stem 9 with the nozzle tube 7.
An exhaust passage 20 is provided which communicates with this discharge passage 19 and exits to the rear part opposite to the nozzle pipe 7.
A vertical communication path between the discharge passage 19 and the discharge passage 19 is filled with a porous material 21. In addition, the injection head 8 has an exhaust path 20
A spherical discharge valve 22 is provided in the lower through hole that penetrates the middle part vertically and passes into the bellows pump 14, and the tubular support shaft 23 is airtightly inserted into the upper through hole so that the switching knob 24 can be rotated. I am wearing it.

The switching cock 24 has two through holes 25 and 26 bored in the tubular support shaft 23 at angular positions within 180 degrees, and the lower end opening is inserted into the discharge valve 22, so that it can be opened by the handle 27. When the through hole 25 is connected to the outlet side of the exhaust passage 20 as shown in FIGS. When the passage is blocked and the through hole 26 is communicated with the passage on the porous material 21 side of the exhaust passage 20, the bellows pump 14
communicates with the porous material 21 side via the discharge valve 22, and at this time, the outlet side of the exhaust path 20 is blocked.

"Effects of the Invention" As described above, according to the present invention, the liquid or foam can be injected by simply switching the switching tip 24, which is extremely convenient for use. In addition, the present invention requires a bellows pump 14, a switching cock 24, and an exhaust path 20 system to be formed in the injection head 8, but these can be installed using a conventional injection pump as is, attached to this pump, and partially installed. This is advantageous in terms of manufacturing because it can be done by adding processing to the .

[Brief explanation of the drawing]

Figures 1a and 1b show an embodiment of the foam/liquid switching pump of the present invention, Figure a is a top view of the injection head, and Figure 1b is a top view of the injection head.
2 is an enlarged perspective view of the switching pot of the same embodiment, and FIG. 3 is an enlarged sectional view taken along the line A--A in FIG. 1b. DESCRIPTION OF SYMBOLS 1... Container body, 2... Mounting member, 3... Cylinder, 8... Injection head, 14... Bellows pump,
24... Switching over.

Claims (1)

[Scope of utility model registration request] An injection head 8 having a lower end connected to a cylindrical piston 10 inside the cylinder 3 and having a nozzle pipe 7 at the upper end was connected and fixed to a cylinder 3 installed inside the mouth of the container body 1 via a mounting member 2. stem 9
is urged upward by a return spring 11 and is inserted so as to be able to move up and down, and includes a liquid injection system having a suction valve 6 at the bottom of the cylinder 3 and a discharge valve 12 at the piston 10, and the stem 9. A bellows pump 14 having an intake valve 18 at the bottom thereof is disposed between the lower surface of the injection head 8 and the upper surface of the mounting member 2, and the inside of the bellows pump 14 is connected to the injection head 8 via a discharge valve 22 on one side. An air supply system that communicates with the liquid discharge passage 19 and has an exhaust passage 20 that leads directly to the outside on the other side, and the liquid discharge passage 1.
Porous material 2 provided in a communication path between 9 and the exhaust path 20
1, and a switching device which is inserted into the exhaust passage 20 from the top surface of the injection head 8 and selects the air supply from the bellows pump 14, which is rotated to interlock with liquid injection, to the porous material 21 side or directly to the outside. Foam/liquid switching pump consisting of 24.