Refilling pump

Abstract

To obtain a refilling pump that allows air to flow from the outside into the sealed inner container when a liquid is dispensed, the refilling pump is a refilling pump 1 for dispensing liquid from the inner container 6 contained in the outer container 3, which is installed on a cap 5 that closes the opening 4 of the outer container 3. The pump consists of a cylindrical cylinder 11, a dispensing nozzle 13 located at the upper part of the cylindrical cylinder 11, and a nozzle connected to the cylindrical cylinder 11. The lower part of the connecting tube 14 of 11 is composed of a suction tube 15. The suction tube 15 is composed of a small diameter tube 16 and a large diameter tube 17. The small diameter tube 16 is airtightly fitted to the outer periphery of the connecting tube 14. The large diameter tube 17 is connected to the upper end of the small diameter tube 16 and is movably fitted to the outer periphery of the cylindrical cylinder 11. The large diameter tube 17 is provided with a first vent hole 19 that connects the gap 18 between the cylindrical cylinder 11 and the large diameter tube 17 to the inner container 6.

Description

Technical Field

[0001] This invention relates to an injection pump for a refill container, which is installed on the lid of an outer container to draw out liquid from an inner container contained within the outer container. Background Technology

[0002] A refill container is known, comprising: an inner container containing a liquid and having a suction port on its upper surface sealed by a sealing plate, which is replaced when the liquid is depleted; an outer container housing the inner container; a cap closing the outer container containing the inner container; and an injection pump mounted on the cap for drawing out the liquid contained in the inner container. The injection pump comprises: a cylindrical cylinder fixed to a pump mounting port on the top plate of the cap; an injection nozzle located on the upper part of the cylindrical cylinder, which also serves as the operating part of a piston within the cylindrical cylinder; and a suction tube connected to a connecting tube section located on the lower part of the cylindrical cylinder, which is inserted into the suction port on the upper surface of the inner container when the opening of the outer container is closed by the cap (see, for example, Patent Document 1).

[0003] Regarding the installation of the injection pump to the cover body as described in Patent Document 1, it is performed by the following: a mounting cap is provided on the injection pump in a manner that covers the cylindrical cylinder portion, the cylindrical cylinder portion is fitted into the pump mounting port body provided on the top plate of the cover body, and the mounting cap is threaded to the pump mounting port body to fix the cylindrical cylinder portion to the pump mounting port body.

[0004] Prior art literature

[0005] Patent documents

[0006] Patent document 1: Japanese Patent Application Publication No. 2019-119499. Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] According to the refill container with the injection pump described in Patent Document 1, when the opening of the outer container is closed with the cover and the sealing plate that seals the suction port provided on the upper surface of the inner container is broken, and the suction tube of the injection pump is inserted into the inner container, the broken sealing plate becomes tightly attached to the outer peripheral surface of the suction tube.

[0009] Therefore, when operating the dispensing pump to draw liquid from the inner container, the inner container becomes under negative pressure due to the suction of the liquid, the piston in the cylindrical cylinder returns slowly. In addition, if the inner container is made of a flexible material, it may dent due to the negative pressure, which may sometimes prevent the smooth dispensing of liquid from the inner container.

[0010] The purpose of this invention is to provide a dispensing pump for a refill container that allows air to flow from the outside into the sealed inner container during liquid dispensing, thereby enabling smooth dispensing of liquid from the inner container.

[0011] Solution for solving the problem

[0012] To achieve the aforementioned objective, the invention described in claim 1 is a pump for a refill container, installed on a cover that closes the opening of an outer container, for drawing out liquid contained within an inner container of the outer container. It is characterized by comprising: a cylindrical cylinder fixed to a pump mounting port body provided on the top plate of the aforementioned cover; a pump nozzle located on the upper part of the aforementioned cylindrical cylinder, which also serves as the operating part of the piston within the aforementioned cylindrical cylinder; and a suction pipe connected to a connecting pipe located on the lower part of the aforementioned cylindrical cylinder, before use... When the cap closes the opening of the outer container, it is inserted into the suction port provided on the upper surface of the inner container. The suction tube is composed of a small-diameter tube and a large-diameter tube. The small-diameter tube is airtightly fitted to the outer periphery of the connecting tube provided at the lower part of the cylindrical cylinder to draw in the liquid in the inner container. The large-diameter tube is connected to the upper end of the small-diameter tube and is movably fitted to the outer periphery of the cylindrical cylinder. The large-diameter tube is provided with a first vent hole that communicates the gap between the cylindrical cylinder and the large-diameter tube with the inner container.

[0013] The invention described in claim 2 is characterized in that, in the cylinder of the aforementioned cylindrical cylinder section described in claim 1, on the cylinder wall outside the movement range of the aforementioned piston and on the side connected to the external gas, a second vent hole is provided to communicate the gap between the aforementioned cylindrical cylinder section and the aforementioned large-diameter pipe section with the interior of the aforementioned cylinder.

[0014] The effects of the invention

[0015] According to the dispensing pump for the refill container described in claim 1, the aforementioned suction tube is composed of a small-diameter tube section and a large-diameter tube section. The aforementioned small-diameter tube section is airtightly fitted to the outer periphery of the connecting tube section provided at the lower part of the aforementioned cylindrical cylinder section, drawing in liquid from the inner container. The aforementioned large-diameter tube section is connected to the upper end of the small-diameter tube section and is movably fitted to the outer periphery of the aforementioned cylindrical cylinder section. The aforementioned large-diameter tube section is provided with a first vent hole that communicates the gap between the aforementioned cylindrical cylinder section and the aforementioned large-diameter tube section with the inner container. Therefore, when the dispensing pump is operated to draw liquid from the inner container and the inner container becomes negatively pressured due to the drawing of liquid, an amount of air corresponding to the drawing of liquid enters from the upper opening of the aforementioned large-diameter tube section into the gap between the aforementioned cylindrical cylinder section and the aforementioned large-diameter tube section, and is drawn into the inner container through the gap and the first vent hole provided in the aforementioned large-diameter tube section, thus enabling smooth dispensing of liquid from the inner container.

[0016] According to the dispensing pump for the refill container described in claim 2, in the cylinder of the aforementioned cylindrical cylinder section described in claim 1, a second vent hole is provided on the cylinder wall outside the movement range of the aforementioned piston and on the side connected to the external gas, communicating with the gap between the aforementioned cylindrical cylinder section and the aforementioned large-diameter tube section and the interior of the aforementioned cylinder section. Therefore, when the dispensing pump is operated to perform a liquid suction operation from the inner container, and the inner container becomes negative pressure due to the suction of the liquid, an amount of air corresponding to the suction of the liquid enters from the upper opening of the aforementioned large-diameter tube section towards the gap between the aforementioned cylindrical cylinder section and the aforementioned large-diameter tube section, and enters from the second vent hole on the cylinder wall outside the movement range of the aforementioned piston and on the side connected to the external gas section towards the gap between the aforementioned cylindrical cylinder section and the aforementioned large-diameter tube section. Therefore, it becomes easier for air to be sucked into the inner container that has become negative pressure through the aforementioned gap, and the dispensing of liquid from the inner container can be performed more smoothly.

[0017] Furthermore, even if the upper opening of the aforementioned large-diameter tube is blocked, the liquid can still be smoothly dispensed from the inner container because it enters from the second vent hole on the cylinder wall outside the piston's movement range and on the external gas communication side into the gap between the aforementioned cylindrical cylinder and the aforementioned large-diameter tube. Attached Figure Description

[0018] Figure 1 This is an exploded cross-sectional view showing a first example of an embodiment of the injection pump for a refill container according to the present invention.

[0019] Figure 2 It shows that it is installed Figure 1 A cross-sectional view of an example of the refill container of the injection pump shown.

[0020] Figure 3 yes Figure 2 The exploded cross-sectional view of the reloading container is shown.

[0021] Figure 4 This indicates when installed with Figure 1 The diagram illustrates the flow of air drawn into the inner container as the dispensing pump draws liquid from the inner container.

[0022] Figure 5 This is a cross-sectional view showing a second example of an embodiment of the injection pump for a refill container according to the present invention. Detailed Implementation

[0023] Hereinafter, a first example of an embodiment of the dispensing pump for a refill container according to the present invention will be described in detail with reference to the accompanying drawings.

[0024] Figure 1 This is an exploded cross-sectional view showing the injection pump for the refill container of the first example. Figure 2 It shows that it is installed Figure 1 The diagram shows a cross-sectional view of an example of the refill container of the injection pump. Figure 3 yes Figure 2 The exploded cross-sectional view of the reloading container shown is shown. Figure 4 This indicates when installed with Figure 1 The diagram illustrates the flow of air drawn into the inner container as the dispensing pump draws liquid from the inner container.

[0025] The dispensing pump 1 for the refill container in the first example is installed on the cover 5 that closes the opening 4 of the outer container 3 that constitutes the refill container 2, and draws out the liquid contained in the inner container 6 inside the outer container 3.

[0026] First, an example of a refill container 2 using the injection pump 1 of the first example will be described.

[0027] The refill container 2 comprises: an inner container 6 which contains a liquid and has a suction port 8 on its upper surface that is closed by a sealing piece 7 and is replaced when the liquid is exhausted; an outer container 3 which has an opening 4 at its upper part to accommodate the inner container 6; and a cylindrical lid 5 which fits into the outer container 3 containing the inner container 6 and closes the opening 4 of the outer container 3.

[0028] Furthermore, a pump mounting port body 10 for installing the injection pump 1 is provided on the top plate 9 of the cover body 5.

[0029] The dispensing pump 1 installed on the pump mounting port 10 on the top plate 9 of the cover 5 consists of the following: a cylindrical cylinder 11, which is fitted and fixed to the pump mounting port 10; a dispensing nozzle 13, which is located on the upper part of the cylindrical cylinder 11 and also serves as the operating part of the piston 12 inside the cylindrical cylinder 11; and a suction pipe 15, which is connected to a connecting pipe 14 located on the lower part of the cylindrical cylinder 11. When the opening 4 of the outer container 3 is closed by the cover 5, the sealing piece 7 that seals the suction outlet 8 located on the upper surface of the inner container 6 breaks and is inserted into the inner container 6.

[0030] The suction tube 15 is composed of a small-diameter tube section 16 and a large-diameter tube section 17. The small-diameter tube section 16 is airtightly fitted to the outer periphery of the connecting tube section 14 located at the lower part of the cylindrical cylinder section 11, drawing in the liquid from the inner container 6. The large-diameter tube section 17 is connected to the upper end of the small-diameter tube section 16 and is movably fitted to the outer periphery of the cylindrical cylinder section 11. The large-diameter tube section 17 is provided with a first vent hole 19 that communicates the gap 18 between the cylindrical cylinder section 11 and the large-diameter tube section 17 with the inner container 6.

[0031] In addition, the injection pump 1 is provided with a mounting cap 20 in a manner that covers the cylindrical cylinder portion 11. The cylindrical cylinder portion 11 of the injection pump 1 is fitted into the pump mounting port body 10 provided on the top plate 9 of the cover body 5. The mounting cap 20 is threaded to the pump mounting port body 10, thereby fixing the cylindrical cylinder portion 11 to the pump mounting port body 10, and thus installing the injection pump 1 on the cover body 5.

[0032] According to the first example of the filling pump 1 for a refill container, the suction pipe 15 is composed of a small-diameter pipe section 16 and a large-diameter pipe section 17. The small-diameter pipe section 16 is airtightly fitted to the outer periphery of the connecting pipe section 14 located at the lower part of the cylindrical cylinder section 11, drawing in liquid from the inner container 6. The large-diameter pipe section 17 is connected to the upper end of the small-diameter pipe section 16 and is movably fitted to the outer periphery of the cylindrical cylinder section 11. In the large-diameter pipe section 17, a gap 18 is provided to connect the cylindrical cylinder section 11 and the large-diameter pipe section 17 with the inner container 6. The first vent 19 is connected, so when the injection pump 1 is operated to suck out liquid from the inner container 6, and the inner container 6 becomes negative pressure due to the suction of liquid, an amount of air corresponding to the suction of liquid enters from the upper opening of the large-diameter tube 17 into the gap 18 between the cylindrical cylinder 11 and the large-diameter tube 17, and is sucked into the inner container 6 through the gap 118 from the first vent 19 provided in the large-diameter tube 17, so that the liquid can be smoothly injected from the inner container 6.

[0033] Figure 5 This is a cross-sectional view showing a second example of an embodiment of the injection pump for a refill container according to the present invention.

[0034] For the injection pump for the refill container in Example 2, the same reference numerals are used for the same components as in Example 1 and their descriptions are omitted; for the components that are different from those in Example 1, descriptions are provided.

[0035] Regarding the injection pump 1 for the refill container in the second example, a second vent 21 is provided on the cylinder wall of the cylinder 11a of the cylindrical cylinder 11, on the side outside the movement range of the piston 12 and on the side connected to the external gas, to communicate with the gap 18 between the cylindrical cylinder 11 and the large-diameter pipe 17 and the inside of the cylinder 11a.

[0036] The other components are the same as in Example 1.

[0037] According to the second example of the injection pump 1 for a refill container, a second vent 21 is provided on the cylinder wall 11a of the cylindrical cylinder 11, on the side outside the movement range of the piston 12 and in communication with external gas, to communicate with the gap 18 between the cylindrical cylinder 11 and the large-diameter tube 17 and the inside of the cylinder 11a. Therefore, when the injection pump 1 is operated to suck out liquid from the inner container 6, and the inner container 6 becomes negative pressure due to the sucking out of liquid, the pressure is reduced relative to the sucking out of liquid. A corresponding amount of air enters from the upper opening of the large-diameter tube 17 into the gap 18 between the cylindrical cylinder 11 and the large-diameter tube 17, and also enters from the second vent 21 of the cylinder wall on the side outside the movement range of the piston 12 of the cylinder 11a and the side connected to the external gas into the gap 18. As a result, it becomes easier for air to be drawn into the inner container 6, which is under negative pressure, through the gap 18, and the liquid can be dispensed from the inner container 6 more smoothly.

[0038] Furthermore, even if the upper opening of the large-diameter tube 17 is blocked, the liquid can still be smoothly dispensed from the inner container 6 because it enters from the second vent 21 of the cylinder wall on the outer side of the piston 12's movement range and the external gas communication side into the gap 18 between the cylindrical cylinder 11 and the large-diameter tube 17.

[0039] The other effects are the same as in Example 1, so the description in Example 1 is referenced.

[0040] Explanation of reference numerals in the attached figures

[0041] 1 Injection Pump

[0042] 2 Reinstall the container

[0043] 3. Outer container

[0044] 4. Opening

[0045] 5. Cover

[0046] 6. Contents

[0047] 7. Sealing sheet

[0048] 8. Suction outlet

[0049] 9. Top Slab

[0050] 10 Pump mounting port body

[0051] 11. Cylindrical cylinder section

[0052] 11a cylinder

[0053] 12 Pistons

[0054] 13 Injection nozzle

[0055] 14 Connecting pipe section

[0056] 15. Inhalation tube

[0057] 16 Small diameter pipe section

[0058] 17 Large diameter pipe part

[0059] 18 gaps

[0060] 19. Vent No. 1

[0061] 20. Hat assembly

[0062] 21. Second vent.

Claims

1. A dispensing pump for a refill container, which is installed on a cap that closes the opening of an outer container and is used to draw out liquid contained in an inner container within the outer container, characterized in that... The device comprises: a cylindrical cylinder fixed to a pump mounting port on the top plate of the cover; an injection nozzle located on the upper part of the cylindrical cylinder, which also serves as the operating part of the piston within the cylindrical cylinder; and a suction tube connected to a connecting tube located on the lower part of the cylindrical cylinder. When the opening of the outer container is closed by the cover, the suction tube is inserted into an outlet on the upper surface of the inner container. The suction tube consists of a small-diameter tube and a large-diameter tube. The small-diameter tube is airtightly fitted to the outer periphery of the connecting tube located on the lower part of the cylindrical cylinder to draw in liquid from the inner container. The large-diameter tube is connected to the upper end of the small-diameter tube and is movably fitted to the outer periphery of the cylindrical cylinder. The large-diameter tube has a first vent hole that communicates the gap between the cylindrical cylinder and the large-diameter tube with the inner container.

2. The dispensing pump for a refill container according to claim 1, characterized in that, In the cylinder of the cylindrical cylinder section, on the cylinder wall outside the piston's movement range and on the side connected to external gas, a second vent hole is provided that connects the gap between the cylindrical cylinder section and the large-diameter pipe section to the inside of the cylinder.

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