JP4531024B2 - Push pump - Google Patents

Description

  The present invention relates to a push pump structure. In particular, the present invention relates to a push pump structure that prevents the push pump from sucking the content liquid due to air leakage due to wear around the piston.

When designing a container for a general cleaning liquid detergent, a push pump with an elastic push function is usually installed on the head of the container to suck out the liquid in the container so that the lid is opened and closed each time it is used. Inconvenience of taking out the contents liquid can be avoided.
Chinese Patent No. 90200119 “Pushhead Safety Locking Structure” uses a pushhead of inner and outer tubes. The push head is installed at the open end of the container, the inner tube of the push head is interlocked as the push head is pushed, and an elastic part such as a spring for returning the piston and the piston to the original position at the bottom of the inner tube When the inner tube is pushed down, the liquid in the container is pushed up according to the movement of the piston.When the user releases the push head, the push head is returned to its original position by the elastic force of the elastic parts. Return, and repeat to suck out the liquid in the container.
However, although these known structures achieve the effect of conveniently sucking out the liquid in the container, the liquid in the container contains granules such as an industrial hand soap, a facial cleanser with a scrub effect, etc. In the case of the form, the outer tube and inner tube wall surface of the push head are worn by the granule of the content liquid during use, and a gap is generated, so that the sealing property between the piston and the piston cannot be maintained. As a result, the action of compressing the piston and sucking out the content liquid is reduced, and even the function may be lost. Therefore, it lacks practicality and needs to be improved.
JP-A-2005-47520

The known structure has the following drawbacks.
That is, in the known structure, when the content liquid of the container is in a form containing granules or scrubs, the outer tube of the push head and the inner tube wall surface are worn by the granule of the content liquid during use, and a gap is formed and cannot be sealed. , The effect of sucking out the content liquid may be impaired, and further, it may become unusable.
The present invention provides a push pump structure that solves the problems of the above structure.

In order to solve the above problems, the present invention provides the following push pump structure.
In the push pump structure, it is possible to improve the disadvantage that the known push pump is worn by the content liquid containing granules or scrubs and causes air leakage and becomes unusable.
That is, it includes a fixed tube, a movable tube, a hermetic seal device,
A lid is installed outside the fixed tube and combined with the open end of the container, an installation space is provided in the fixed tube, and the movable tube is installed in the installation space.
The apex end of the movable tube extends the head, the head communicates with the inside of the movable tube, has an outlet end, and the user can push the head to suck out the liquid content in the container,
The hermetic seal device is coupled to the bottom end of the movable tube by a method of closely contacting the inner wall surface of the fixed tube, thereby forming a liquid seal chamber having a backflow prevention function between the hermetic seal device and the movable tube, In the liquid seal chamber, when the movable tube is pushed, a part of the content liquid is stored in the liquid seal chamber to form a liquid seal layer,
Furthermore, the push pump is characterized in that by forming a liquid seal layer with the content liquid itself, the content liquid granule or the scrub tube wall can be prevented from being worn, and problems such as the resulting air leakage can be solved. Structure.

As described above, in the present invention, a liquid seal chamber having a backflow prevention function is formed between the hermetic seal device and the movable tube, and when the movable tube is pushed in the liquid seal chamber, some content liquid is liquid. Since the liquid seal layer is stored in the seal chamber to form the liquid seal layer, the liquid seal layer formed by the content liquid itself prevents the content liquid granule or the scrub tube wall from being worn and solves problems such as derived air leakage. be able to.

As shown in FIGS. 1 and 2, the main body 1 of the push pump structure of the present invention includes a fixed tube 10, a movable tube 20, and a hermetic seal device 30.
When the user pushes down the movable tube head of the main body 1, as the movable tube 20 is pushed into the interior along the fixed tube 10, the internal solution is pressurized by the piston action of the tip, and the content liquid is passed through the movable tube. Achieve the function of extruding. The operating principle and structure of this type of push head pump that pushes out the content liquid belongs to a known technique and will not be described in detail here.
The fixed tube 10 is a tubular body that conducts the internal solution inside, and a container lid 11 is installed outside. The lid 11 seals the opening of the container 40. The container 40 is filled with the content liquid. An installation space 12 through which the internal solution is circulated is formed in the fixed tube 10, and a return component 13 having an elastic force for returning the piston of the push head pump mechanism of the present invention to its original position is installed. The return component 13 is a coil spring in this embodiment.
The movable tube 20 is installed in the installation space 12 of the fixed tube 10, and a head 21 is formed at the upper end of the movable tube 20. The head 21 is provided with an outlet end 211 and communicates with the movable tube 20. Therefore, when the user pushes down the head 21 to lower the movable tube 20 in the axial direction in the fixed tube 10, the user receives the elastic force of the return component 13, and the user moves his hand from the head 21. Release it to restore its original position.

Next, as shown in FIGS. 3 to 8, the hermetic seal device 30 includes a piston 31 and a backflow prevention valve 32.
The piston 31 of the hermetic seal device 30 is coupled to the bottom end of the movable tube 20 and slidably moves in close contact with the inner wall surface of the installation space 12 of the fixed tube 10. A liquid seal chamber 33 is formed between the tubes 20. The piston 31 has at least one through hole 311 and at least one positioning hole 312.
The through hole 311 communicates with the liquid seal chamber 33, and the inner diameter of the through hole 311 is large at both ends, and exhibits a bidirectionally inclined shape that gradually decreases toward the center. The positioning hole 312 is positioned by the backflow prevention valve 32.
The backflow prevention valve 32 includes a block-shaped plug valve 321 having an inclined surface corresponding to the inclined shape of the through hole 311, and a positioning rod 322 inserted through the positioning hole 312.
The plug valve 321 of the backflow prevention valve 32 provides a one-way backflow prevention function to the liquid seal chamber 33, whereby the inner solution that has flowed into the liquid seal chamber 33 by the pump operation is stored. Further, the sealing action of the stored content liquid is enhanced by the bidirectional inclined shape of the through hole 311, and the leakage of the internal solution stored in the liquid seal chamber is effectively prevented and held around these pistons. To do.
The positioning rod 322 is inserted into and fitted into the positioning hole 312, and the backflow prevention valve 32 opens and closes with a constant stroke by the fitting of the positioning rod 322 and the positioning hole 312.
The through-hole 311 and the plug valve 321 are not limited to the configurations shown in FIGS. 3 and 4 and may have any other geometric shape having a valve action.

Subsequently, as shown in FIGS. 9 and 10, when the user depresses the head 21 in use, the content liquid is pushed upward, and the backflow prevention valve 32 receives the pressure of the content liquid and moves upward. The plug valve 321 that seals the through hole 311 moves upward, and the through hole 311 is opened. In this way, the content liquid finishes flowing into the liquid seal chamber 33 from the through hole 311, and the backflow prevention valve 32 is sealed again when the pressure for pushing up the content liquid disappears, and the content liquid is sealed in the liquid seal chamber 33. Stored within.
Since the content liquid forms an airtight liquid sealing layer, the fixed tube 10 is partitioned into an installation space 12 below the hermetic seal device 30 and an installation space 12 above the hermetic seal device 30. Thus, in the process in which the movable tube 20 is pushed down, the content liquid introduced into the liquid seal chamber 33 is always emphasized around the piston, and unevenness due to scratches generated on the inner peripheral wall surface of the fixed tube 10. In order to satisfy this condition, the liquid content stored in the container is completely pumped out according to the pumping operation of the movable tube 20 due to the liquid sealing effect when the movable tube 20 performs a linear repetitive operation along the fixed tube 10.
By content liquid storing the liquid seal chamber 33 to form a liquid seal layer, when the user again pushes the head portion 21, the movable tube 20 without causing air leakage liquid contents of a predetermined volume Can be pumped out. The content liquid flows from the bottom of the installation space 12 to the movable tube 20, and the content liquid flowing to the movable tube 20 is discharged from the outlet end 211 of the head 21. Since the liquid sealing layer has a function of preventing air leakage, the amount of content liquid released by the user pressing down the head 21 is kept constant, which is very convenient for use.

It is an external solid direction figure of this invention push pump structure. It is a section indication figure of the present invention push pump structure. It is a three-dimensional exploded view of a hermetic seal device having a push pump structure according to the present invention. It is an external three-dimensional perspective view of the hermetic seal device of the push pump structure of the present invention. FIG. 5 is a sectional view taken along line AA in FIG. 4. FIG. 6 is a cross-sectional instruction diagram of the backflow prevention valve opened state of FIG. 5. FIG. 5 is a sectional view taken along line BB in FIG. 4. FIG. 8 is a cross-sectional instruction diagram of the backflow prevention valve opened state of FIG. 7. It is a use condition section directions figure of the push pump structure of the present invention. It is a backflow prevention valve opening instruction | indication figure of this invention push pump structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 10 Fixed pipe 11 Lid 12 Installation space 13 Return part 20 Movable pipe 21 Head 211 Outlet end 30 Sealing seal device 31 Piston 311 Through-hole 312 Positioning hole 32 Backflow prevention valve 321 Plug valve 322 Positioning rod 33 Liquid seal chamber 40 container

Claims (5)

It consists of a fixed tube, a movable tube, and a piston.
A fixed pipe sealed and fixed at the opening of the liquid container is used as a flow path for the internal solution, a movable pipe is arranged in the fixed pipe, and a pump is constituted by a piston and a fixed pipe provided at the tip of the movable pipe. By installing a return component that returns the piston to its original position with elastic force inside, the head provided at the upper end of the movable tube is pushed down to reciprocate the movable tube in the fixed tube axis direction. In the push pump that pushes up the inner solution and pumps the inner solution from the head outlet provided at the upper end of the movable tube through the movable tube,
The piston is provided with a through-hole having a backflow prevention valve that flows in the fixed pipe above the piston between the movable pipe and the fixed pipe, and a liquid is provided between the movable pipe and the fixed pipe above the piston. Forming a sealing chamber,
By causing the internal solution to flow into the liquid seal chamber by the lowering operation of the piston, closing the backflow prevention valve by the upward operation of the piston, and storing the internal solution in the liquid seal chamber,
Fill around the piston with the internal solution to maintain the sealing performance with the inner wall of the fixed tube.
A push pump characterized by that. The backflow prevention valve is
According to claim 1, wherein the <br/> consisting valve structure which protrudes form a positioning rod for insertion into the positioning hole formed in cock valve and the piston to be fitted closed through hole provided in the piston Push pump. The through hole inner surface, push pump according to claim 1, wherein the forming opposing bidirectional inclined plane to the cock valve. The push pump according to claim 1, wherein the return component is a spring. The lid is provided outside the movable tube, and is combined with the container.

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