JPS6330506Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump for liquids, for example for atomizers, foam ejectors, etc. In this type of pump, when the push-down head that protrudes upward through the stem is moved up and down, the inside of the cylinder below the stem becomes negative pressure, and the liquid inside the container is discharged through the liquid suction means with a suction valve. It is sucked into the cylinder, and as the pressure inside the cylinder increases, it is ejected from the outlet of the push-down head through a discharge passage with a discharge valve, and in the case of a sprayer, it is sprayed by a spin mechanism etc. installed at the outlet. In the case of a foam ejector, the foam is ejected as foam by passing through a porous water-permeable material provided near the discharge port and mixing with a large amount of separately introduced air.

Incidentally, a liquid pump installed in this manner is often transported while attached to a container containing liquid, and in this way, when the container falls over,
Both the suction valve and the discharge valve open, which has the disadvantage that liquid leaks through the liquid suction path, cylinder, and liquid discharge path of the liquid suction means.

The present invention eliminates the above-mentioned drawbacks, and will be described below with reference to the drawings. Reference numeral 1 denotes a mounting means for fitting into the mouth and neck of the container body. The mounting means has a peripheral wall 2 that is screwed onto the outer surface of the container mouth neck, and has a stem through hole 3 in the center of the top wall. The upper part of the peripheral wall is a small diameter part, and a clamping cylinder 4 is inserted from the back surface of the top wall inside the small diameter part.
is installed vertically. A cylindrical engagement means 6 having an engagement protrusion 5 on the outer periphery of the upper end stands up from the upper surface of the top wall, surrounding the stem through hole 3.

The cylinder 7 is suspended by the mounting means and vertically installed inside the container. The cylinder has an upper end cylindrical portion as a large diameter portion, and the large diameter portion is fitted onto the upper inner surface of the peripheral wall of the mounting means, and a liquid suction means 9 with a suction valve 8 is vertically disposed from the lower end of the cylinder. be. The suction means may be of any type as long as it forms a liquid suction path from the inside of the container to the inside of the cylinder, and the structure can be simplified by vertically disposing the pipe 10 as shown in the illustrated example. The suction valve can be provided in the middle of the suction path.

A cylindrical piston 13 attached to the lower end of a stem 12 forming a part of the actuating member 11 is fitted into the cylinder so as to be movable up and down. The actuating member has a stem 12 that passes through a stem through hole formed in the top wall of the mounting means, and an upper cylindrical portion of a cylindrical piston 13 is fitted into the lower end of the stem. A push-down head 15 with a discharge port 14 is fitted therein. The inside of the cylindrical piston and the discharge port are communicated through a discharge passage, and a discharge valve 16 is provided in the middle of the discharge passage. In the illustrated example, it is provided on the inner surface of the intermediate portion of the stem, but it may also be provided within the push-down head.
It can also be provided within a cylindrical piston. The cylindrical piston is formed by surrounding the lower outer surface of the cylindrical portion with a curved band 17 whose upper and lower peripheral edges are in watertight contact with the inner wall surface of the cylinder. A push-down rod 18 is suspended from the inner surface of the cylindrical portion of the cylindrical piston via a connecting piece. The rod may be vertically disposed from the lower end of the stem, and is provided so as to press against the suction valve element 19 and keep the suction valve hole closed when the actuating member is pressed down. The suction valve body may be a ball valve as shown in FIG. 1, or may be formed of a tongue-shaped valve plate 20 as shown in FIGS. 2 and 3. A cylindrical engagement means 22 having a second engagement protrusion 21 on the inner surface of the lower end that engages with the aforementioned engagement protrusion 5 when the head is depressed is suspended from the push-down head. When the lowering head is pressed down, the engagement protrusions and the second engagement protrusion are engaged, and the depressed state of the head is maintained, and the engagement is released by forcibly pulling up the head. It is set up like this.

A spring 23 is installed inside the cylinder to push up the actuating member.

In the illustrated example, the through hole 24 provided in the upper part of the cylinder is a hole for preventing negative pressure inside the container body, and the appropriate number of protrusions 25 vertically provided on the inner surface of the lower part of the cylinder are used to prevent the cylindrical piston from moving inward. When positioned, the high-pressure gas or high-pressure liquid in the cylinder is discharged from the negative pressure prevention hole into the container body through the space between the outer surface of the cylindrical piston and the inner surface of the cylinder.

The present invention has the above-mentioned configuration, and the engagement means 6, 22 that can maintain the depressed state of the push-down head are detachably provided on the mounting means 1 and the push-down head 15. , and from the cylindrical piston or stem is a push-down rod 1 that presses the suction valve body into the valve hole closed state when the engaging means is in the engaged state.
8 is installed vertically, even if the container topples over in this state, the suction valve body will move and the suction valve will not open at all.As a result, the liquid inside the container will enter the cylinder from the liquid suction path, and the liquid will flow further. It is possible to prevent liquid from leaking through the discharge path. In addition, since the actuating member can be maintained in a depressed state, the push-down head at the upper end of the stem is located low, so the head is less likely to get in the way during transportation, and it can be packed compactly. It has the effect of not being bulky.

[Brief explanation of the drawing]

Fig. 1 is a side view of the pump according to the invention, partially shown in cross section, Fig. 2 is a half sectional view showing the main parts of the pump according to another embodiment, and Fig. 3 is a perspective view showing the discharge valve body of Fig. 2. It is a diagram. DESCRIPTION OF SYMBOLS 1... Mounting means, 7... Cylinder, 11... Operating member, 18... Push-down bar.

Claims (1)

[Scope of utility model registration request] A mounting means 1 is fitted onto the mouth neck of the container body, and a liquid suction means 9 with a suction valve 8 is suspended from the container body by the mounting means and is suspended from the lower end thereof.
A cylinder 7 is installed vertically, and a cylindrical piston attached to the lower end of a stem 12 passed through the mounting means is fitted into the cylinder in a watertight manner, and a push-down head 15 with a discharge port is fitted to the upper end of the stem. , a liquid pump having an actuating member 11 equipped with a discharge valve 16 in the middle of a discharge path that communicates the inside of the cylindrical piston and a discharge port, and in which a spring 23 for pushing up the actuating member is installed in the cylinder, Engaging means 6 and 22, which can maintain the depressed state of the head 15 against the bias of the spring by engaging with each other, are detachably attached to the mounting means 1 and the pressing head 15. and a push-down rod 18 is provided vertically from the cylindrical piston or stem to contact the suction valve body and press the valve body against the valve seat when the engaging means is in the engaged state. pump.