JP2018015685A - Spring pressure accumulation type spray pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further enlarge a spray quantity of one time by a spring pressure accumulation type spray pump.SOLUTION: A spring pressure accumulation type spray pump is composed of a pressure accumulation pump for connecting a dip tube 11 to a lower end part and a spray head 25 connected to the upper end of a plunger 14 fitted from above in this pressure accumulation pump. The inside of the pressure accumulation pump is provided with a pressure accumulation chamber 13 of a content fluid, and is provided with a backward motion spring 17 for energizing the spray head 25 and the plunger 14 upward and a pressure accumulation spring 18 for compressing the content fluid in the pressure accumulation chamber 13 via a piston 16, and when pushing down the spray head 25 and the plunger 14, the backward motion spring 17 contracts, and the content fluid in the pressure accumulation chamber 13 is compressed, and the content fluid is sprayed from a nozzle hole 26 of the spray head 25 by pushing down the piston 16 by repulsive force of the pressure accumulation spring 18. The pressure accumulation spring 18 is provided in a housing 10 of the pressure accumulation pump, and the backward motion spring 17 is interposed between the housing 10 of the pressure accumulation pump and the spray head 25 by an external part of the pressure accumulation pump.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an improvement of a spring accumulator spray pump that is provided at an upper end opening of various containers and can spray the solution therein.

Examples of this type of conventional spring pressure accumulation spray pump include those described in the following patent documents.
In the invention described in Patent Document 1 below, an open / close valve is provided in the upper part of the storage chamber by using the levitation force of air so that the air does not stay in the storage chamber (accumulation chamber) of the pressure accumulation pump. The purpose is to be able to discharge.

  The configuration includes a valve housing having an air inlet hole for preventing vacuum generation in the container and opening in the vertical direction, a plunger provided with a liquid passage for pressurizing liquid and introducing the liquid to the nozzle, and the plunger A piston that slides secretly between the outer periphery of the valve and the inner wall of the valve housing, a compression spring that biases the plunger and the piston, and prevents backflow of liquid in one direction but allows in the other direction Includes a check valve, a valve for opening and closing a passage from the pressure accumulator chamber to the nozzle, a cap fixed to the valve housing and engaged on the container, and a spray head suitable for discharging the pressure accumulating liquid to the outside In the pressure-accumulating spray pump, the valve is provided in the upper part of the pressure-accumulating chamber to prevent air from remaining in the pressure-accumulating chamber.

  In the invention described in the following Patent Document 2, the residual air generated in the pressure accumulating chamber is eliminated, and the liquid passage that connects the pressure accumulating chamber and the nozzle with the piston is opened and closed to simplify the structure. It is aimed.

  The structure includes a container, a spray head that discharges the content liquid to the outside, a cap that engages the pump body on the container, a valve housing that includes an air entry hole that prevents vacuum generation in the container, and a content A plunger provided with a passage for pressurizing the liquid and introducing the content liquid to the nozzle; a piston slidingly sliding between the outer periphery of the plunger and the inner wall of the valve housing; and the plunger and the piston In a spring accumulator spray pump including a biasing compression spring and a check valve that allows liquid content in one direction but not in the reverse direction, the plunger is a horizontal hole that is normally closed by a piston. When the plunger is moved, the lateral hole is opened from the piston and communicates the pressure accumulating chamber and the nozzle to spray the pressure accumulation material (content liquid).

Japanese Patent Publication No. 60-31551 Japanese Patent Publication No. 60-31552

  The present invention relates to a spring pressure-accumulating spray pump similar to the above-described conventional example, but its structure or configuration is improved, and the content liquid is stored and compressed (accumulated), and then sprayed from the nozzle. In the spray pump, an object of the present invention is to make the inner volume of the pressure accumulating chamber larger and to increase the spray amount or the injection amount at one time.

At the same time, it is also a problem to reduce the loss of the content liquid so that almost all the content liquid stored in the pressure accumulating chamber can be discharged.
Incidentally, the above-described one injection amount is set to about 0.4 ml to 2.0 ml.

Therefore, the applicant of the present application has created a spray pump having the structure shown in FIG. 3 in order to solve the above problems.
FIG. 3 is a cross-sectional explanatory view of a spring accumulator spray pump developed by the applicant to solve the above-mentioned problem, with the left half showing a non-operating state and the right half showing an operating state.

  The structure is such that a dip tube 11 is connected to the lower end portion of the housing 10, and a check valve 12 is disposed at the lower end portion of the housing 10 in a passage continuing from the dip tube 11, above the check valve 12. A pressure accumulating chamber 13 is disposed, a plunger 14 is fitted from the upper end of the housing 10, and a gap pin 15 is disposed on the shaft core portion of the plunger 14, and between the gap pin 15 and the plunger 14. Forms a passage for the content liquid, and a piston 16 is disposed between the outer peripheral wall of the plunger 14 and the inner wall of the housing 10, and the plunger 14 is attached upward between the piston 16 and the plunger 14. A return spring 17 is disposed, and a pressure accumulation spring 18 is disposed between the piston 16 and the housing 10.

A cap 20 is provided at a substantially central portion of the outer periphery of the housing 10, and a female screw is formed on the inner peripheral surface of the cap 20, so that a male screw provided on the outer periphery of the upper end opening of the container C is mutually connected. The pressure accumulating pump can be attached by screwing.
A push button serving as a spray head is attached to the upper end portion of the plunger 14, and by pressing this push button, a certain amount of content liquid stored in the pressure accumulating chamber 13 is discharged from the nozzle 26 of the push button 25. It is sprayed outside.

After the content liquid stored in the pressure accumulating chamber 13 is appropriately sprayed to the outside by the pressure accumulating spring 18, the pressing of the push button 25 is released to return to the upper position. Becomes a negative pressure, and the content liquid is replenished from the dip tube 11 into the pressure accumulating chamber 13.
When the content liquid in the container is replenished into the pressure accumulating chamber 13 from the dip tube 11, the internal pressure in the container C becomes negative, so that the outside air is introduced into the container through the outside air introduction port 10h for introducing outside air. It is a structure introduced in

Also in this development example, in order to increase the spray amount per time, it is possible to increase the vertical length of the pressure accumulating chamber 13 of the housing 10, but the stroke of the plunger 14 is limited to a predetermined range. Therefore, the length in the vertical direction cannot simply be increased.
This is the same in the above-described conventional example.

Therefore, the idea of increasing the vertical length of the pressure accumulating chamber cannot increase its internal volume.
This is the starting point of the present invention, and the spring accumulator spray pump shown in FIG. 3 is further improved to arrive at the present invention.

  In order to solve the above-mentioned problem, a first one of the present invention includes an accumulator pump having a dip tube coupled to a lower end portion, and a spray head coupled to an upper end of a plunger that is fitted into the accumulator pump from above. A pressure accumulation chamber for the content liquid is provided in the pressure accumulation pump, and a return spring for biasing the spray head and the plunger upward, and a pressure accumulation spring for compressing the content liquid in the pressure accumulation chamber through a piston. And when the spray head and the plunger are pressed, the return spring contracts, the liquid content in the pressure accumulating chamber is compressed, and the piston is pressed by the repulsive force of the pressure accumulating spring so that the spray head In a spring pressure accumulation type spray pump in which the content liquid in the pressure accumulation chamber is sprayed, the pressure accumulation spring is provided in the housing of the pressure accumulation pump, The dynamic spring is a spring accumulator spray pump being characterized in that interposed between the outside of the accumulator the pump housing of the accumulator pump the spray head.

  According to a second aspect of the present invention, there is provided a spring pressure accumulation spray pump according to the first aspect, wherein a cap portion for sealing an upper end opening of the container is formed on an outer periphery of the housing of the pressure accumulation pump. is there.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a downward cylindrical extension wall extending downward from the outer peripheral edge at the lower end of the spray head is provided, and a substantially central portion of the outer peripheral portion of the accumulator pump. Alternatively, an upward annular wall extending upward from the upper end of the cap portion is provided, and the return spring is positioned inside the downward cylindrical extension wall and the upward annular wall so as not to be seen from the outside. It is a spring pressure accumulation type spray pump.

  According to a fourth aspect of the present invention, in any one of the above-described inventions, a gap pin is disposed separately on the shaft core portion of the plunger, and the gap between the outer wall of the gap pin and the inner wall of the plunger is the content. A spring accumulator spray pump characterized by being a liquid flow passage.

  In the first one of the present invention, it comprises a pressure accumulating pump having a dip tube connected to a lower end portion thereof, and a spray head connected to an upper end of the pressure accumulating pump, and a pressure accumulating chamber for content liquid is contained in the pressure accumulating pump. A return spring that biases the spray head upward and a pressure accumulation spring that compresses the content liquid in the pressure accumulation chamber. When the spray head is pressed, the return spring contracts and the content in the pressure accumulation chamber is reduced. In a spring pressure accumulation spray pump in which liquid is compressed and the content liquid in the pressure accumulation chamber is sprayed from the nozzle hole of the spray head by the repulsive force of the pressure accumulation spring, the pressure accumulation spring is provided in the housing of the pressure accumulation pump, In other words, the return spring is interposed between the housing of the pressure accumulation pump and the spray head outside the pressure accumulation pump. Since placing the pulling outside the housing, it is possible to increase the inner diameter of the accumulator chamber.

  That is, if the diameter of the upper end opening of the container is the same and the configuration and size of the pump are the same, normally, a return spring and an accumulator spring are provided in parallel inside the housing. By arranging the return spring outside the housing, it is possible to increase the outer diameter of the plunger because only the pressure accumulating spring is present in the housing, which also increases the inner diameter of the pressure accumulating chamber. As a result, the internal volume of the pressure accumulating chamber can be increased.

Although it can be considered that the above-mentioned return spring and pressure accumulation spring should be arranged in series, in order to make the upper and lower strokes of the spray head larger and maximum, the return spring and the pressure accumulation spring are again arranged. It is necessary to provide in parallel.
Therefore, in the present invention, a return spring is provided outside the housing to solve the problem.

In the 2nd thing of this invention, the cap part for attaching an accumulator pump to the upper-end opening part of a container is specified.
That is, a cap portion for sealing the upper end opening of the container is formed on the outer periphery of the housing of the pressure accumulating pump.
Usually, there is a male screw portion outside the upper end opening of the container, and it is possible to easily attach and fix the female screw to be screwed to the male screw portion by a cap provided on the inner wall surface. it can.

In the third aspect of the present invention, the configuration for preventing the return spring provided outside the housing from being visually recognized from the outside is specified.
That is, a downward cylindrical extension wall extending downward from the outer peripheral edge of the lower end of the push button is provided, and an upward annular wall extending upward from the substantially central portion of the outer peripheral portion of the pressure accumulation pump or the upper end portion of the cap portion is provided. The return spring is configured to be located inside the downward cylindrical extension wall and the upward annular wall.
As a result, the return spring cannot be visually recognized from the outside, and has a smart appearance.

In the fourth aspect of the present invention, the configuration of the plunger is further limited, that is, a gap pin is separately provided on the shaft core portion of the plunger, and the outer wall of the gap pin and the The gap between the inner wall of the plunger is used as a flow path for the content liquid.
As a result, the volume of the flow passage in the plunger is minimized, almost all of the content liquid stored in the pressure accumulating chamber is sprayed to the outside, and the remaining content liquid can be reduced as much as possible. Loss can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a center longitudinal cross-sectional view which illustrates the spring accumulator spray pump which concerns on one Embodiment of this invention, The non-operation state is illustrated. It is the center longitudinal cross-sectional view of the said embodiment, Comprising: The spraying state which pressed down the spraying head is illustrated. It is sectional explanatory drawing of the spring pressure accumulation type spray pump which the applicant created before development of this invention, The left half illustrates a non-operation state, The right half illustrates an operation state.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a central longitudinal sectional view illustrating a spring pressure accumulation type spray pump according to an embodiment of the present invention, and illustrates a non-operating state thereof.
FIG. 2 is a central longitudinal sectional view of the above embodiment, and shows a sprayed state in which the spray head is pressed.

The spring accumulator spray pump according to the present invention is attached and fixed to the upper end opening of the container C in which various liquid contents are accommodated.
The housing 10 has a substantially cylindrical shape, and a tubular connecting portion 10d connected to the dip tube 11 is provided at a lower end portion thereof. An upper end portion of the tubular connecting portion 10d, that is, a bottom surface portion of the housing 10 is provided. A check valve 12 made of a steel ball is provided.

The plunger 14 is fitted from above at the upper end opening of the housing 10.
A spray head 25 is connected to the upper end of the plunger 14.
A pressure accumulating chamber 13 is formed in a lower portion of the lower end portion of the plunger 14.
A piston 16 is disposed in an airtight manner between the outer wall of the plunger 14 and the inner wall of the housing 10, and slides up and down between them.

The pressure accumulation spring 18 always presses the piston 16 downward.
A cap 20 is provided at a substantially central portion of the outer peripheral surface of the housing 10, and the cap 20 is screwed into the upper end opening of the container C.
That is, a female screw is engraved on the inner peripheral surface of the cap 20, a male screw is engraved on the outer peripheral surface of the upper end opening of the container C and screwed together, and the cap 20 is opened at the upper end opening of the container C. Fixed to.

A little under the cap 20 is provided with an outside air inlet 10h for supplementing the negative pressure in the container C after the content liquid is sprayed.
Further, a gap pin 15 is disposed on the shaft core portion of the plunger 14, and a small gap between the outer wall of the gap pin 15 and the inner wall of the plunger 14 forms a flow path for the content liquid.

An orifice 14 h made up of a horizontal hole is provided at an appropriate position of the plunger 14. In the non-operating state of FIG. 1, the orifice 14 h is closed by the piston 16.
The plunger 14 is pressed when the spray head 25 is pressed, the content liquid in the pressure accumulating chamber 13 is compressed, and the state shown in FIG. 2 is shown (in FIG. 2, the spray completion state is shown). Spraying is completed.

The operation of this accumulator pump will be described in detail below.
First, in the state of FIG. 1, the plunger 14 is positioned at the uppermost position, and the content liquid in the container C is stored in the pressure accumulating chamber 13.
At this time, the orifice 14 h of the plunger 14 is closed by the piston 16.

When the spray head 25 is pressed with a finger or the like from this state, the plunger 14 and the gap pin 15 are pressed.
Then, the content liquid in the pressure accumulation chamber 13 is compressed and pressurized.
Then, the liquid content flows upward from the outer periphery of the bottom surface of the plunger 14 and the gap pin 15 and pushes the piston 16 upward against the downward biasing force of the pressure accumulation spring 18.

When the piston 16 is pushed upward, the liquid content enters the lower portion of the piston 16 and the space below the piston 16 and the orifice 14h of the plunger 14 communicate with each other.
Thereafter, the compressed content liquid flows from the gap between the plunger 14 and the gap pin 15 to the spray head 25 and is sprayed from the nozzle 26.

  FIG. 2 shows a state in which the spraying of the content liquid is completed, that is, a state in which the piston 16 is pushed down to its lowest position by the action of the pressure accumulation spring 18 and the spraying of the content liquid is completed. Yes.

  When the pressing force on the spray head 25 is released from the state of FIG. 2, the spray head 25 and the plunger 14 are acted on by the action of the return spring 17 interposed between the spray head 25 and the upper end surface of the cap 20. Shifts upward and returns to the original non-operating state.

At this time, that is, when the plunger 14 moves upward, the pressure accumulation chamber is evacuated by the action of the check valve 12 located at the lower end of the housing 10, so that the content liquid inside the container C is accumulated in the pressure accumulation chamber 13. Will flow in.
This state is the inoperative state of FIG.
One spray is performed by repeating a series of operations as described above.

Here, as is well understood, only the pressure accumulation spring 18 that always urges the piston 16 downward is disposed in the housing 10.
A return spring 17 that constantly biases the spray head 25 and the plunger 14 upward is disposed outside the housing 10.

As described above, in the pressure accumulating pump shown in FIG. 3, since the return spring 17 and the pressure accumulating spring 18 are both disposed in the housing 10, the upper end opening of the container has the same size (the same diameter). 3), the outer diameter of the pressure accumulating chamber is smaller in the form of FIG.
That is, the outer diameter of the pressure accumulating chamber can be made larger in the embodiment of the present invention.
As a result, the amount of spraying once can be increased appropriately.

Here, in the above embodiment, the return spring 17 is interposed between the spray head 25 and the upper end surface of the cap 20 of the housing 10, but the return spring 17 cannot be seen from the outside. Therefore, a downward cylindrical extension wall 27 extending downward from the outer peripheral edge of the lower end of the spray head 25 is provided, and an upward annular wall 28 is provided from the upper end surface of the cap 20.
In this embodiment, the downward cylindrical extension wall 27 is disposed on the inner side and the upward annular wall 28 is disposed on the outer side. However, the arrangement of the inner side and the outer side may be reversed.

Although one embodiment of the present invention has been described above, various design changes can be made in the present invention as follows.
First, the size, material, and the like of the pressure accumulating pump according to the present invention can be appropriately designed as necessary.

The range of the vertical stroke of the plunger can also be designed freely as appropriate.
In the above embodiment, the plunger portion is implemented as a combination with the gap pin of the shaft core portion, but it can also be manufactured as an integral unit.
That is, it is a plunger made of a rod-like body, and a bottleneck may be formed in the axial direction thereof.

The piston is hermetically disposed between the outer wall of the plunger and the inner wall of the housing, but a sealing member such as an O-ring can be appropriately interposed.
As the return spring and the pressure accumulation spring, a metal coil spring is used, but other materials may be used.

  In the above embodiment, the cap is a screw type cap, but the fixing means for this cap is not a screw type, but a simple fitting type can also be used. Apply.

Other configurations of this type of spring accumulator spray pump can employ conventional ones.
As described above, in the present invention, the pressure accumulating chamber is obtained by taking out and disposing the return spring that always urges the plunger and the spray head upward, that is, always to the original unused position. Was successfully increased in size.

DESCRIPTION OF SYMBOLS 10 Housing 11 Dip tube 12 Check valve 13 Accumulation chamber 14 Plunger 14h Orifice 15 Crevice pin 16 Piston 17 Returning spring 18 Accumulation spring 20 Cap 25 Spray head 26 Injection hole 27 Downward cylindrical extension wall 28 Upward annular wall C Container

Claims (4)

It consists of an accumulator pump with a dip tube connected to its lower end and a spray head connected to the upper end of a plunger that fits into the accumulator pump from above, and an accumulator chamber for content liquid is provided in the accumulator pump. A return spring that urges the spray head and the plunger upward, and a pressure accumulation spring that compresses the content liquid in the pressure accumulation chamber via a piston. When the spray head and the plunger are pressed, In the spring pressure-accumulating spray pump, the content liquid in the pressure accumulation chamber is compressed, the piston is pushed down by the repulsive force of the pressure accumulation spring, and the content liquid in the pressure accumulation chamber is sprayed from the nozzle of the spray head.
A spring pressure accumulation spray pump, wherein the pressure accumulation spring is provided in a housing of the pressure accumulation pump, and the return spring is interposed between the pressure accumulation pump housing and the spray head outside the pressure accumulation pump.   The spring accumulator spray pump according to claim 1, wherein a cap portion for sealing an upper end opening of the container is formed on an outer periphery of the housing of the accumulator pump.   A downward cylindrical extension wall extending downward from the outer peripheral edge of the lower end of the spray head is provided, and an upward annular wall extending upward from the substantially central part of the outer peripheral part of the accumulator pump or the upper end of the cap part is provided. The spring accumulator spray pump according to claim 1 or 2, wherein the return spring is positioned inside a downward cylindrical extension wall and an upward annular wall so as not to be seen from the outside.   2. A gap pin is provided separately on the shaft core of the plunger, and the gap between the outer wall of the gap pin and the inner wall of the plunger serves as a flow path for the content liquid. The spring pressure accumulation type spray pump of any one of thru | or 3.