JP3657391B2 - Liquid jet pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid jet pump.
[0002]
[Prior art]
As a liquid jet pump, a fixed suction part is formed by fixing a cylinder in a state where the lower end is suspended in the container body by means of a fitting cylinder fitted to the container body neck and neck, and an upward bias from the opening at the center of the upper end of the suction part And a working jet part in which a push-down head with a jet outlet is fitted and fixed to the upper end of the stem that is protruded so as to move up and down in a state, and the liquid in the container is sucked up and jetted from the jet outlet by the vertical movement of the working jet part The composition is known.
[0003]
In the conventional pump of this type, the upward urging of the working jet is generally performed by a metal coil spring interposed below the working jet in the cylinder. That is, the operating jet is supported by a coil spring and is always pushed upward, and the operating jet is lowered while compressing the coil spring by pushing down the head, and when the head is released, the elastic force of the spring It moves up and down so that the working jet is pushed up.
[0004]
[Problems to be solved by the invention]
The above metal coil springs have a good return function and a good pumping function of the pump. However, in recent waste disposal situations, separation of metal and plastic is not possible. In the conventional ones, there is a demand, and these separations are extremely difficult due to the fact that these coil springs are generally fine and sealed inside.
[0005]
In consideration of such circumstances, attempts have been made to change the coil spring from metal to plastic, but plastic is generally inferior in durability and elastic restoring force compared to metal. Therefore, when trying to obtain a restoring force similar to that of a metal one, its diameter and thickness must be increased, which greatly affects the form or size of the entire pump, which is not realistic at present. .
[0006]
The present invention has been made in view of the above points, and without using a metal coil spring, does not require a separation treatment of this part, and can be formed without greatly changing the form of this conventional pump, The present invention proposes a liquid jet pump having an excellent return capability of an operating jet part.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the pump according to the first aspect of the present invention is a fixed suction formed by fixing the cylinder 5 in a state where the lower end is suspended in the container body by the mounting cylinder 4 fitted to the outer periphery of the mouth neck portion 3 of the container body 2. The upper end of the stem 7 in which the annular piston 6 with the outer peripheral edge slidably fitted on the inner surface of the part A and the inner surface of the cylinder is linked to the lower part of the outer periphery and the upper part protrudes from the opening at the center of the upper end of the fixed suction part And a working jet part B in which a push-down head 8 with a jet nozzle a is fitted and fixed, and a liquid configured such that the liquid in the container is sucked up and ejected from the jet outlet a of the head by the vertical movement of the working jet part. In the jet pump, a product made of a synthetic resin that extends between the lower outer periphery of the stem and the upper inner periphery of the cylinder by pushing down the working jet part B and biases the pushed-down working jet part upward. Spiral spring A stopper 11 is installed on the outer peripheral portion of the stem so as to be detachably fitted to the material 10 and interposed between the upper surface of the fixed suction portion A and the lower surface of the push-down head 8 to prevent the working spray portion from being pushed down. It was configured as a characteristic liquid jet pump.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in the drawings, the liquid ejection pump 1 of the present invention is a fixed suction formed by fixing a cylinder 5 with a lower end suspended in a container body by a mounting cylinder 4 fitted to the outer periphery of a mouth neck portion 3 of the container body 2. The upper part of the stem 7 in which the part A and the annular piston 6 slidably fitted on the inner surface of the cylinder are slidably connected to the lower part of the outer periphery is projected from the opening at the upper center of the fixed suction part A so as to be movable up and down. And a working jet part B formed by fitting and fixing a push-down head 8 with a jet nozzle a at the upper end of the stem 7, and the liquid in the container body is sucked up and jetted from the jet nozzle of the head 8 by the vertical movement of the working jet part. A known pump mechanism configured as described above is provided.
[0009]
As the pump mechanism, for example, in addition to the presence of the cylinder 5 and the piston 6, a suction valve b is provided in the lower part of the cylinder, and a discharge valve c is provided in the liquid flow path from the cylinder to the jet outlet a of the head 8. The liquid in the cylinder pressurized by the pushing of the ejection part B opens the discharge valve c and ejects from the ejection port a of the head 8, and at the time of the upward movement of the working ejection part B, the negative pressure in the cylinder A known mechanism is adopted in which the discharge valve c is closed, the suction valve b is opened, and the liquid in the container is introduced into the cylinder 5 through a pipe 9 suspended from the lower end of the cylinder.
In this embodiment, the lower end of the stem 7 is closed, and a liquid flow through hole d is formed in the lower part of the cylindrical wall, and the through hole is closed so that it can be opened and closed so that it can move up and down by a predetermined width. The inner peripheral edge of the piston 6 is fitted to the lower outer periphery of the stem.
[0010]
According to the present invention, in this kind of liquid jet pump described above, the operating jet part B extends between the lower outer periphery of the stem and the upper inner peripheral part of the cylinder by pushing down the actuating jet part B, and the actuating jet part in the depressed state is moved upward. And a stopper 11 for preventing the working jet B from being pushed down by interposing between the upper surface of the fixed suction part A and the lower face of the push-down head 8. The stem 7 is detachably fitted to the outer peripheral portion.
[0011]
By adopting the so-called tension spring described above, an elastic restoring force not much inferior to that of a metal coil spring can be obtained without specially increasing the size, and the presence of the stopper 11 can provide a helical shape when not in use. The spring member 10 is configured to prevent the inconvenience of causing a sag or the like without applying a load to the spring member 10 as much as possible and to obtain excellent durability as a result.
[0012]
In the embodiment shown in the drawings, the spiral spring member 10 includes an upper ring 12 having a flange 12b extending inward from the lower end edge of the cylindrical base 12a, and a flange 13b outward from the lower end edge of the cylindrical base 13a. The lower ring 13 that is extended is connected to the inner peripheral edge of the lower surface of the flange 12b of the upper ring 12, and the lower end is integrally connected to the outer peripheral edge of the flange 13b of the lower ring 13. And a plurality of spiral spring portions 14. Then, the upper ring 12 is moved to the upper part of the inner periphery of the cylinder by fitting the cylindrical base portion 12a by bringing the lower surface into contact with the upward step portion 15 at the lower end of the enlarged diameter portion provided on the inner surface of the upper end portion of the cylinder 5. On the other hand, a cylindrical base portion 13a is fitted into a downward annular groove 16 provided in the lower outer periphery of the stem 7 to fix the lower ring 13 to the lower outer periphery of the stem.
[0013]
In the present embodiment, an auxiliary cap 17 is fitted and fixed to the upper end of the cylinder 5, and the cap is fitted to the outer periphery of the upper end portion of the cylinder 5 so as not to be pulled out by means of uneven engagement means. A donut plate-like top plate is extended inward, and a guide tube for guiding the vertical movement of the stem 7 is suspended from the inner periphery of the top plate, and is suspended from the lower surface of the top plate at the center of the guide tube and the fitting tube. The provided locking cylinder 17a is fitted to the upper end of the inner surface of the cylinder 5 so that the upper ring 12 is locked so that it cannot be pulled out.
[0014]
The stem 7 is composed of a cylindrical upper member having upper and lower ends opened and a bottom member having a bottomed cylindrical shape having an upper end, and a short flange projecting outward from the lower end edge of the upper member. The upper diameter portion of the lower member is fitted and fixed to the inner surface of the larger diameter cylindrical portion, and the lower portion of the larger diameter cylindrical portion is made thinner than the upper portion, and the above is disposed on the inside thereof. An annular concave groove 16 is formed.
[0015]
The spiral spring member 10 is not limited to the one having a plurality of spiral spring portions 14 as in the above-described embodiment, and may be one in which a single spiral spring portion is installed, in which case the elastic restoring force is considered. Then, it is preferable to select such as decreasing the pitch and increasing the thickness. In the case of the present invention, even if the pitch is extremely small, there is no possibility that the operation will be hindered. Therefore, it is not necessary to increase the size of the spring member 10 as a whole.
[0016]
As shown in FIG. 4, the stopper 11 in this embodiment includes a fitting portion 18 having a ring-opening cylindrical shape to be fitted to the outer periphery of the stem, and a transverse section Y projecting from the center of the outer surface of the fitting portion. A vertically long handle 19 having a letter shape is integrally formed, the lower surface of the fitting portion 18 is brought into contact with the upper surface of the top plate of the auxiliary cap 17, and the upper surface of the fitting portion 18 is brought into contact with the lower surface of the push-down head 8, A fitting portion 18 is fitted on the outer periphery of the stem 7 so as to be detachable. The stopper 11 is configured to have such a height that the spiral spring member 10 is maintained in a non-expanded state in which almost no load is applied, and cannot be pushed further.
[0017]
In the pump 1 configured as described above, as shown in FIG. 1, during operation and storage before use, the operation ejection part B is made impossible to be pushed down by the stopper 11, and at this time, the helical spring member 10 is hardly loaded. In the state, it is stored in the upper part of the cylinder 5. In use, when the stopper 11 is removed from this state, and then the operation jetting part B is pushed down against the elastic force of the spiral spring part 14, the liquid in the cylinder is pressurized and the pressurized liquid is The discharge valve c is opened and ejected from the ejection port a of the head 8. Further, when the pressing of the push-down head 8 is released, the operation ejection portion B is raised by the elastic restoring force of the spring portion 14, the negative pressure in the cylinder 5 is closed, the discharge valve c is closed, the suction valve b is opened, and the container is opened. The body fluid is introduced into the cylinder 5 through the pipe 9.
Each of the above members is mainly formed of a synthetic resin, and is formed by using an elastomer or the like as necessary.
[0018]
【The invention's effect】
As described above, the liquid jet pump according to the present invention has the above-described configuration. In particular, the liquid jet pump is extended between the lower portion of the outer periphery of the stem and the upper portion of the inner periphery of the cylinder. Since a helical spring member made of synthetic resin that urges the portion upward is installed, the spring portion of the member can obtain a sufficient restoring force even if the pitch is small or almost no It is possible to obtain the same elastic restoring force without drastically changing the shape and size of the pump using the coil spring, and to smoothly reciprocate the working ejection part. It exhibits unique effects such as no need for processing.
[0019]
In addition, since a stopper that is interposed between the upper surface of the fixed suction portion and the lower surface of the push-down head to prevent the operation spray portion from being pushed down is detachably fitted to the outer peripheral portion of the stem, a load is applied to the spiral spring member. It can be maintained in a state without any loss, and there is very little risk of a reduction in restoring force, such as a sag in a spring member made of synthetic resin. It is done.
[Brief description of the drawings]
FIG. 1 is a half sectional view showing an embodiment of a liquid jet pump according to the present invention.
FIG. 2 is a longitudinal sectional view of a main part showing a spiral spring member in the same embodiment.
FIG. 3 is a half cross-sectional view of the same embodiment when the operation ejection portion is pushed down;
FIG. 4 is a perspective view showing a stopper according to the embodiment.
[Explanation of symbols]
2 ... container body, 3 ... mouth neck, 4 ... mounting cylinder, 5 ... cylinder, 6 ... annular piston, 7 ... stem, 8 ... pressing head, 10 ... spiral spring member, 11 ... stopper, A ... fixed suction part, B: Actuation jet part, a ... Jet port

Claims (1)

A fixed suction part A in which the cylinder 5 is fixed in a state where the lower end is suspended in the container body by the mounting cylinder 4 fitted to the outer periphery of the mouth-and-neck part 3 of the container body 2, and the outer peripheral edge can be slid on the inner surface of the cylinder. An operating jet in which a press-down head 8 with a jet outlet a is fitted and fixed to the upper end of a stem 7 in which the fitted annular piston 6 is linked to the lower part of the outer periphery and the upper part protrudes upward from the opening at the center of the upper end of the fixed suction part. A liquid jet pump configured to suck up the liquid in the container body by the vertical movement of the working jet part and eject the liquid from the jet outlet a of the head. Between the upper part, a helical spring member 10 made of synthetic resin that extends by pushing down the working jet part B and biases the pushed down working jet part upward is installed, and the upper surface of the fixed suction part A And press down Liquid jet pump, characterized in that a stopper 11 for preventing the depression of the actuating ejecting portion interposed therebetween, comprising freely-fitted detachably in the stem outer peripheral portion between the de 8 underside.

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