Hanging nozzle for refill pouches

Abstract

To provide a hanging nozzle for a refill pouch which has an extremely small number of parts and can sufficiently ensure a pump function. [Solution] The mounting part (10) can be attached to the outlet at one end of the refill pouch. The first duckbill check valve (11) is made of elastic material, and its inlet is installed at the outlet of the mounting part, and the outlet is composed of two leaflets that converge at a first slit. The pump chamber (12) is made of elastic cylindrical material, and its inlet is exteriorly fitted to cover the outlet of the first duckbill check valve. The outlet is a second duckbill check valve part composed of two leaflets that converge at a second slit, and the two leaflets of the second duckbill check valve part are arranged in the same direction as the convergence of the two leaflets of the first duckbill check valve. The frame (13) is made of flexible frame material, and its inlet is attached to the mounting part, sandwiching the inlet of the pump chamber and the inlet of the first duckbill check valve.

Description

[Technical Field]

[0001] The present invention relates to a hanging nozzle for a refill pouch. [Background technology]

[0002] Typically, pump containers are used to store liquids such as shampoo, conditioner, and detergent. When the liquid runs out of the pump container, the user transfers the liquid from a refill pouch into the pump container and uses the pump container again. Here, a refill pouch refers to a bag-like container used when refilling the pump container with liquid.

[0003] When using a refill pouch, a user cuts one end of the refill pouch and transfers the liquid from the cut end to a pump container. However, this can be time-consuming for the user, and the user may fail to transfer the liquid to the pump container. Another problem is that some liquid may remain in the refill pouch after the user removes the liquid from it. To address this problem, attempts have been made to attach a nozzle to the bottom of the refill pouch and suspend the refill pouch to use it as a pump container.

[0004] For example, JP 2002-510247 A (Patent Document 1) discloses a switchable cartridge pump for dispensing liquids, which includes a liquid reservoir, a liquid metering chamber, and a one-way check valve. The liquid metering chamber has a compressible elastic housing that receives liquid from the reservoir through an inlet. At least one of the check valves includes a flexible membrane with an opening and a valve seat that fits into the opening of the flexible membrane and deforms the flexible membrane. The deformed flexible membrane has an elastic restoring force, which causes the flexible membrane to act on the valve seat, forming a liquid seal. This allows for easy liquid discharge.

[0005] Furthermore, International Publication No. 2021 / 059696 (Patent Document 2) discloses a dispenser including a main body having a recess, a lid that covers the opening of the recess, and a pump chamber. This dispenser ejects liquid from the pump chamber through a nozzle by performing a dispensing operation in which the lid is pressed toward the pump chamber and deformed. Furthermore, this dispenser allows liquid to flow into the pump chamber by releasing the dispensing operation. This facilitates the dispensing operation and also improves the suction of liquid into the pump chamber. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Special table number 2002-510247 [Patent Document 2] International Publication No. 2021 / 059696 Summary of the Invention [Problem to be solved by the invention]

[0007] Currently, hanging nozzles for refill pouches on the market use common check valves, coil springs, ball valves, etc., which result in complex structures, a large number of parts, and high costs. For example, the above-mentioned hanging nozzle adds pump function by using the elastic restoring force of an elastic pump chamber, but this pump chamber alone cannot ensure sufficient pump function, so a coil spring with excellent elasticity must be used, which results in a complex structure. The technologies described in the above-mentioned Patent Documents 1 and 2 also have similar problems.

[0008] Therefore, the present invention has been made to solve the above-mentioned problems, and has an object to provide a hanging nozzle for a refill pouch that has an extremely small number of parts and can fully ensure pump function. [Means for solving the problem]

[0009] The hanging nozzle for refill pouches according to the present invention comprises an attachment portion, a first duckbill-type check valve, a pump chamber, and a frame. The attachment portion is configured as a flexible tube and is attachable to an outlet at one end of a refill pouch suspended by the suspension portion. The first duckbill-type check valve is elastic, with an inlet portion located at the outlet portion of the attachment portion and an outlet portion consisting of two leaflets that converge at a first slit. The pump chamber is elastic and configured as a tube and has an inlet portion exteriorly fitted to cover the outlet portion of the first duckbill-type check valve. The outlet portion is a second duckbill-type check valve portion consisting of two leaflets that converge at a second slit, with the two leaflets of the second duckbill-type check valve portion arranged in the same direction as the convergence of the two leaflets of the first duckbill-type check valve. The frame body is configured in a flexible frame shape, and its inlet portion is attached to the mounting portion, sandwiching the inlet portion of the pump chamber and the inlet portion of the first duckbill check valve, its side portion abuts against a part of the side surface of the pump chamber, and its outlet portion has an opening corresponding to the second slit of the second duckbill check valve portion and abuts against the two valve leaflets of the second duckbill check valve portion of the pump chamber from the outside. [Effects of the Invention]

[0010] According to the present invention, it is possible to significantly reduce the number of parts while still ensuring sufficient pump function. [Brief explanation of the drawings]

[0011] [Figure 1] 1A and 1B are a perspective view of a hanging nozzle for a refill pouch according to an embodiment of the present invention, and a perspective view showing a state in which the hanging nozzle for a refill pouch is used. [Figure 2] 1A and 1B are an exploded front view, an exploded right side view, and an assembled right side view of a hanging nozzle for a refill pouch according to an embodiment of the present invention. [Figure 3] 1A and 1B are a right side view, a bottom perspective view, and a right side cross-sectional view showing the internal structure of a hanging nozzle for a refill pouch according to an embodiment of the present invention. [Figure 4]1 is a cross-sectional view of a right side of a hanging nozzle for a refill pouch according to an embodiment of the present invention. [Figure 5] 1 is a cross-sectional view of a right side of a hanging nozzle for a refill pouch according to an embodiment of the present invention. FIG. [Figure 6] This shows a right side view, a cross-sectional view from the right side, a bottom oblique view, and an enlarged right side view of a hanging nozzle for refill pouches when protrusions are provided on two valve leaflets in the second duckbill-type check valve section. [Figure 7] 10A and 10B are a right side view, a cross-sectional view from the right side, a bottom perspective view, and an enlarged right side view of a hanging nozzle for refill pouches when protrusions are provided at both ends below the outlet of the frame body. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings to help understand the present invention. Note that the following embodiment is an example of the present invention and is not intended to limit the technical scope of the present invention.

[0013] As shown in Figures 1 to 3, the hanging nozzle 1 for refill pouches (hereinafter referred to as the hanging nozzle) of the present invention comprises an attachment part 10, a first duckbill-type check valve 11, a pump chamber 12, and a frame body 13.

[0014] Here, the attachment part 10 is configured in a flexible tubular shape, and as shown in Figure 1, can be attached to the outlet 22 at one end 21 of the refill pouch 2 suspended by the suspension part 20. Here, there are no particular limitations on the tubular shape of the attachment part 10, but examples include a cylindrical shape, an elliptical cylindrical shape, a square cylindrical shape, and a polygonal cylindrical shape.

[0015] The first duckbill check valve 11 is made of elastic material, and the inlet portion 11a is installed at the outlet portion 10a of the attachment portion 10, and the outlet portion 11b is made up of two valve leaflets 11d that converge at the first slit 11c.

[0016] The pump chamber 12 is formed in an elastic cylindrical shape, with the inlet portion 12a fitted over the outlet portion 11b of the first duckbill check valve 11, and the outlet portion 12b being a second duckbill check valve portion consisting of two valve leaflets 12d that converge at a second slit 12c.

[0017] Here, there are no particular limitations on the cylindrical shape of pump chamber 12, but it may have a shape that corresponds to the cylindrical shape of mounting portion 10 or the cylindrical shape of outlet portion 11b of first duckbill check valve 11. For example, if the cylindrical shape of mounting portion 10 is a cylindrical, elliptical, square, polygonal, etc., then the cylindrical shape of pump chamber 12 is designed to match the cylindrical shape of mounting portion 10. In addition, first duckbill check valve 11 and pump chamber 12 are elastic and therefore made of a softer material than mounting portion 10 and frame 13.

[0018] Furthermore, in pump chamber 12, two leaflets 12d of second duckbill check valve section 12b are arranged in the same direction as the convergence of two leaflets 11d of first duckbill check valve 11. Here, the convergence of two leaflets 12d of second duckbill check valve section 12b in the same direction as the convergence of two leaflets 11d of first duckbill check valve 11 specifically means that the "L-shaped" of two leaflets 12d of second duckbill check valve section 12b is aligned in the same direction as the "L-shaped" of two leaflets 11d of first duckbill check valve 11, as shown in FIG.

[0019] Frame 13 is configured in a flexible frame shape, and inlet portion 13a is attached to outlet portion 10a of mounting portion 10, sandwiching inlet portion 12a of the pump chamber and inlet portion 11a of first duckbill check valve 11. Here, the frame shape of frame 13 refers to part of the framework that surrounds and supports the outer surface of pump chamber 12. By attaching flexible frame 13 to flexible mounting portion 10, sandwiching elastic pump chamber 12 and inlet portion 11a of elastic first duckbill check valve 11, pump chamber 12 and first duckbill check valve 11 are brought into close contact with each other, preventing liquid L from leaking out from inside pump chamber 12 or first duckbill check valve 11.

[0020] Furthermore, the frame 13 has a side surface portion 13b that abuts against a portion 12e of the side surface of the pump chamber 12 (here, the left and right side surfaces of the pump chamber), and an outlet portion 13c that has an opening 13c1 corresponding to the second slit 12c of the second duckbill-type check valve portion 12b abuts against the two valve leaflets 12b of the second duckbill-type check valve portion 12b from the outside. Abutting refers to a state of contact or a state of potential contact. Here, the left and right side surface portions 13b of the frame 13 extend from the inlet portion 13a to the outlet portion 13c, and the inlet portion 13a supports the outlet portion 13c via the left and right side surface portions 13b. The frame 13 is shaped so that it does not have front or rear side surface portions. Therefore, the sides of the frame 13 other than the portion 12e of the side surface of the pump chamber 12 that is attached inside the frame 13, i.e., the front and rear side surface portions, are nonexistent and exposed to the outside.

[0021] This makes it possible to minimize the number of parts while still ensuring sufficient pump function. That is, the present invention is composed of four components: the mounting portion 10, the first duckbill check valve 11, the pump chamber 12, and the frame 13. This significantly reduces the number of parts compared to the prior art, dramatically reducing costs. Furthermore, because the present invention does not use a coil spring as in the prior art, it is possible to simplify the structure and improve ease of use for the user.

[0022] Furthermore, in the present invention, the convergence direction of the second duckbill check valve portion 12b of the pump chamber 12 is the same as the convergence direction of the first duckbill check valve 11, the side portion 13b of the frame 13 is abutted against a portion 12e of the side surface of the pump chamber 12, and the outlet portion 13c of the frame 13 passes through the second slit 12c of the second duckbill check valve portion 12b at the opening 13c1, and the two valve leaflets 12d of the second duckbill check valve portion 12b are abutted from the outside. This makes it possible to prevent liquid leakage from the tip (lower end) of the hanging nozzle 1.

[0023] Here, the operation of the hanging nozzle 1 according to the present invention will be specifically described. As shown in Fig. 1-2, first, a user attaches the attachment part 10 of the hanging nozzle 1 to the attachment opening 22 of the refill pouch 2 and hangs the hanging part 20 of the refill pouch 2. Then, as shown in Fig. 4, the liquid L in the refill pouch 2 enters the attachment part 10 of the hanging nozzle 1 through the attachment opening 22 and fills the inside of the first duckbill check valve 11 installed in the attachment part 10 through the inlet part 11a. In other words, the inside of the first duckbill check valve 11 is filled with the liquid L. Here, "filled" means a state in which the inside is partially filled as well as a state in which the inside is completely filled.

[0024] Here, since the two valve leaflets 11d of the first duckbill check valve 11 converge at the first slit 11c, the liquid L filled inside the first duckbill check valve 11 will not come out through the first slit 11c unless a force is applied that pulls the two valve leaflets 11d outward.

[0025] Next, the user presses (squeezes) the pressing side portions 12e (left and right side portions 12e) of the pump chamber 12 where the side portion 13b of the frame 13 is not present. Here, "squeezing" means to squeeze or press. Then, due to the elasticity of the pump chamber 12, the pressing side portions 12e are depressed, the second duckbill check valve portion 12b of the pump chamber 12 is deformed, and the air present inside the pump chamber 12 is released to the outside through the second slit 12c of the second duckbill check valve portion 12b.

[0026] Here, when the user presses the pump chamber 12, the air in the upper interior of the pump chamber 12 pushes the two valve leaflets 11d of the first duckbill check valve 11 upward in the direction of converging toward the first slit 11c, causing the first slit 11c to fit tighter, preventing the liquid L from flowing back through the first slit 11c.

[0027] When the user releases the pressure on the pressing side portion 12e, the pressing side portion 12e (squeezed portion) of the pump chamber 12 returns to its original position due to the elasticity of the pump chamber 12. This creates a negative pressure inside the pump chamber 12, pulling the two valve leaflets 11d of the first duckbill check valve 11 outward, causing the liquid L in the first duckbill check valve 11 to be released from the first slit 11c. The liquid L released from the first slit 11c fills the inside of the pump chamber 12. This completes preparations for releasing the liquid L from the hanging nozzle 1.

[0028] Furthermore, since not all of the air inside the pump chamber 12 is released by a single squeeze, and a certain amount of air remains inside the pump chamber 12, a certain amount of the liquid L released from the first slit 11c accumulates inside the pump chamber 12, and air remains in the upper part of the interior of the pump chamber 12.

[0029] Here, both the first duckbill check valve 11 and the second duckbill check valve portion 12b only deliver the liquid L in one direction (downward in this case), so there is no backflow from inside the pump chamber 12 towards the refill pouch 2.

[0030] Then, as shown in Figure 5, when the user presses the pressing side portion 12e of the pump chamber 12 again, the elasticity of the pump chamber 12 causes the pressing side portion 12e to dent, deforming the second duckbill-type check valve portion 12b of the pump chamber 12, and the liquid L present inside the pump chamber 12 is released to the outside through the second slit 12c of the second duckbill-type check valve portion 12b.

[0031] Here, since the first duckbill-type check valve 11 only delivers the liquid L in one direction, the liquid L is simply released to the outside through the second slit 12c of the second duckbill-type check valve portion 12b, and the liquid L inside the pump chamber 12 does not flow back from the first duckbill-type check valve 11 toward the refill pouch 2.

[0032] In addition, when the user presses the pump chamber 12, the air and liquid L present in the upper interior of the pump chamber 12 push the two valve leaflets 11d of the first duckbill check valve 11 in the direction of converging toward the first slit 11c, causing the first slit 11c to fit tighter, preventing the liquid L from flowing back through the first slit 11c.

[0033] Next, when the user releases the pressure on pressing side portion 12e again, pump chamber 12 returns to its original shape due to its elasticity, and pressing side portion 12e of pump chamber 12 returns to its original shape due to the elasticity of pump chamber 12. At this point, liquid L inside pump chamber 12 is released to the outside, and pump chamber 12 returns to its original shape, causing negative pressure inside pump chamber 12 again and pulling two valve leaflets 11d of first duckbill check valve 11 toward the outside. Then, first slit 11c of first duckbill check valve 11 is released, and liquid L from first duckbill check valve 11 is released from first slit 11c into pump chamber 12. The liquid L released from first slit 11c then fills the inside of pump chamber 12 again. Furthermore, when the liquid L is released from the first duckbill check valve 11, the liquid L in the refill pouch 2 is poured again into the first duckbill check valve 11. This returns the state to the state before the user released the liquid L from the second slit 12c.

[0034] Here, the user's squeezing operation creates a negative pressure in the pump chamber 12, and the liquid L is appropriately supplied from the refill pouch 2 into the pump chamber 12. Then, due to the effects of the first duckbill check valve 11 and the second duckbill check valve portion 12b, there is no backflow into the refill pouch 2. This allows the liquid L in the refill pouch 2 to be used to its full potential.

[0035] Furthermore, in the present invention, because the two leaflets 12d of second duckbill check valve portion 12b are arranged in the same direction as the convergence of the two leaflets 11d of first duckbill check valve 11, the negative pressure in pump chamber 12 when the two leaflets 12d of second duckbill check valve portion 12b return to their original position acts directly on the two leaflets 11d of first duckbill check valve 11. This makes it possible to appropriately link the release of liquid L from second slit 12c of second duckbill check valve portion 12b and the release of liquid L from first slit 11c of first duckbill check valve 11, improving the pump function.

[0036] Furthermore, while a typical pump uses two or more check valves and a spring, which increases the number of parts, the present invention appropriately combines first duckbill-type check valve 11 and second duckbill-type check valve portion 12b as described above, and therefore pump chamber 12 is elastically configured, which acts to restore pump chamber 12. Therefore, sufficient pump function can be achieved without using a spring.

[0037] As described above, all of the air inside the pump chamber 12 is not released in one squeeze, so a predetermined amount of the liquid L released from the first slit 11c accumulates inside the pump chamber 12, and air remains in the upper part of the interior of the pump chamber 12.

[0038] In conventional duckbill check valves, the weight of the liquid filling the interior presses against the slit and two valve leaflets, sometimes causing the slit to open automatically and resulting in leakage. In the present invention, outlet portion 13c of frame 13 abuts against two valve leaflets 12d of second duckbill check valve portion 12b in pump chamber 12 from the outside, making it possible to constantly support and maintain second slit 12c in a closed state and reliably preventing leakage.

[0039] Furthermore, in the present invention, no spring is used in the pump chamber 12, and therefore the pump chamber 12 may not be able to return to its original shape with the restoring force of the pump chamber 12 alone. Therefore, in the present invention, the side surface portion 13b of the frame 13 abuts against and supports parts 12e (left and right side surface portions) of the side surface of the pump chamber 12, so that the side surface portion 13b of the frame 13 acts like a leaf spring on the deformed pump chamber 12, making it easier for the pump chamber 12 to return to its original shape. This allows the pump function to be fully performed.

[0040] Here, the resin that constitutes the mounting portion 10 and the frame body 13 is not particularly limited, but examples thereof include polyethylene terephthalate (PET), polypropylene (PP), and polyethylene (PE).

[0041] Furthermore, there are no particular limitations on the elastic body that constitutes the first duckbill check valve 11 and the pump chamber 12, but examples include ethylene propylene rubber (EPTSealer), silicone rubber, elastomer, nitrile rubber, chloroprene rubber, fluororubber, etc.

[0042] Furthermore, it is preferable that the value of the elastic modulus of pump chamber 12 be equal to or greater than the value of the elastic modulus of first duckbill check valve 11. This ensures that negative pressure is generated inside pump chamber 12 when pump chamber 12 attempts to return to its original shape after deformation, thereby opening first duckbill check valve 11.

[0043] For example, the elastic modulus of silicone rubber is in the range of 1 MPa to 50 MPa, and the elastic modulus of elastomer (TPE) is in the range of 10 MPa to 100 MPa. Therefore, if the elastic body of pump chamber 12 is made of elastomer and the elastic body of first duckbill-type check valve 11 is made of silicone rubber, the elastic modulus value of pump chamber 12 will be equal to or greater than the elastic modulus value of first duckbill-type check valve 11.

[0044] Furthermore, it is preferable that the shape of the second duckbill check valve portion 12b be the same as the shape of the first duckbill check valve 11 or larger than the shape of the first duckbill check valve 11.

[0045] Furthermore, there are no particular limitations on the attachment form between the outlet portion 10a of the attachment portion 10 and the inlet portion 13a of the frame body 13. For example, a cylindrical portion for attachment may be provided on the outside of the outlet portion 10a of the attachment portion 10, and a cylindrical portion that matches the cylindrical portion may be provided on the inside of the inlet portion 13a of the frame body 13, so that the cylindrical portion of the outlet portion 10a of the attachment portion 10 matches the cylindrical portion of the inlet portion 13a of the frame body 13; or a hook portion may be provided on the cylindrical portion of the outlet portion 10a of the attachment portion 10, and an engagement portion onto which the hook portion hooks may be provided on the cylindrical portion of the inlet portion 13a of the frame body 13, so that the hook portion of the outlet portion 10a of the attachment portion 10 hooks onto the engagement portion of the inlet portion 13a of the frame body 13.

[0046] Furthermore, as described above, the shape of the frame body 13 is such that a cylindrical inlet portion 13a is provided with left and right side portions 13b, and the left and right side portions 13b support an outlet portion 13c having a shape corresponding to the shape of the second duckbill-type check valve portion 12b. However, this is not limited to this, and for example, the number of side portions 13b may be increased or decreased within the range in which the pump chamber 12 can be pressed.

[0047] Incidentally, there are no particular limitations on the configuration of the lower ends of second duckbill-type check valve portion 12b or the lower ends of outlet portion 13c of frame body 13, but for example, protrusions may be provided at the lower ends of second duckbill-type check valve portion 12b or the lower ends of outlet portion 13c of frame body 13 to create a space S in which liquid can accumulate directly below second slit 12c.

[0048] For example, as shown in Fig. 6, each of the two leaflets 12d in the second duckbill check valve portion 12b can be provided with a protrusion 12f that protrudes outward from the second slit 12c. Here, the protrusion 12f is provided on each of the two leaflets 12d so as to protrude outward from the opening 13c1 of the frame 13, and a space S is provided between the two protrusions 12f to allow a liquid pool to form.

[0049] In the past, liquid pools formed at the tips of the slits, which not only became noticeable but also fell downward for some reason, causing hygiene problems. In the present invention, by providing protrusions 12f along the exterior of the two leaflets 12d, a space S is provided between the protrusions 12f of the two leaflets 12d where liquid pools can form. Even if liquid pools form in the second slit 12c, the liquid pools remain in the space S between the protrusions 12f, preventing them from falling downward and enabling hygienic use.

[0050] 7, protrusions 13d may be provided on both lower ends of outlet portion 13c of frame 13 along the two valve leaflets 12d of second duckbill-type check valve portion 12b, with second slit 12c sandwiched between them. Here, by providing protrusions 13d on both lower ends of outlet portion 13c of frame 13, a space S is provided between two protrusions 12f for liquid accumulation. As described above, this provides space S for liquid accumulation between protrusions 13d. Even if liquid accumulation occurs at second slit 12c, the liquid will remain in space S between protrusions 13d, preventing it from falling downward, enabling hygienic use.

[0051] Here, there is no particular limitation on the shape of the protrusions 12f and 13d, but for example, as shown in Figures 6 and 7, the cross-sectional shape may be a semi-ellipse and a rectangular parallelepiped that is elongated along the second slit 12c, or the cross-sectional shape may be a semi-polygonal shape and a rectangular parallelepiped that is elongated along the second slit 12c.

[0052] Furthermore, the distance between two protrusions 12f, 13d is not particularly limited, but is preferably set within a range of 1 mm to 10 mm so that a liquid pool is formed between protrusion 13d. Furthermore, the size of two protrusions 12f, 13d in the protruding direction is not particularly limited, but is preferably set within a range of 1 mm to 10 mm so that a liquid pool is formed between protrusion 13d. Furthermore, two protrusions 12f, 13d may be molded integrally with second duckbill check valve 12b or outlet 13c of frame 13, or may be separate from second duckbill check valve 12b or outlet 13c of frame 13 and attached later.

[0053] The hanging part 20 is not particularly limited, but examples thereof include an S-shaped hook and a J-shaped hook as shown in FIG.

[0054] Furthermore, there is no particular limitation on the position of one end 21 of the refill pouch 2, but for example, if the shape of the refill pouch 2 is rectangular, one end 21 of the refill pouch 2 can be one of the four ends of the rectangle, a corner, or the center of the end.

[0055] Furthermore, there are no particular limitations on the outlet 22 of the refill pouch 2 as long as it can be attached to the attachment part 10, but for example, the outlet 22 may be provided with a male screw portion and the attachment part 10 with a female screw portion so that the two can be attached, or conversely, the outlet 22 may be provided with a female screw portion and the attachment part 10 with a male screw portion.

[0056] Furthermore, the outlet 22 of the refill pouch 2 may be provided in advance at one end 21 of the refill pouch 2, or the user may cut off one end 21 of the refill pouch 2 and attach a separate outlet 22 to the cut end 21. [Industrial Applicability]

[0057] As described above, the container cap of the present invention is useful as a container cap for storing solid, semi-liquid, liquid, gel, and other contents such as food seasonings, medicines, cosmetics, shampoo, conditioner, and liquid soap, and is effective as a container cap that can reliably cut the bridge and firmly fix the annular band to the inner stopper. [Explanation of symbols]

[0058] 1 Hanging nozzle for refill pouch 10. Mounting part 11 First duckbill check valve 12 Pump Room 13 Frame

Claims

1. a flexible cylindrical attachment portion that can be attached to an outlet at one end of the refill pouch that is suspended by the suspension portion; a first duckbill check valve made of elastic material, an inlet portion of which is disposed at the outlet portion of the mounting portion, and the outlet portion of which is made of two valve leaflets that converge at a first slit; a pump chamber configured in an elastic cylindrical shape, with an inlet portion exteriorly fitted to cover the outlet portion of the first duckbill-type check valve, with the outlet portion being a second duckbill-type check valve portion composed of two valve leaflets that converge at a second slit, the two valve leaflets of the second duckbill-type check valve portion being arranged in the same direction as the convergence direction of the two valve leaflets of the first duckbill-type check valve; a flexible frame-like frame body, the frame body having an inlet portion attached to the attachment portion with the inlet portion of the pump chamber and the inlet portion of the first duckbill check valve sandwiched therebetween, the frame body having a side surface abutting against a part of the side surface of the pump chamber, and an outlet portion having an opening corresponding to the second slit of the second duckbill check valve portion and abutting against the two valve leaflets of the second duckbill check valve portion of the pump chamber; A hanging nozzle for refill pouches.

2. When a pressing side of the pump chamber where no side portion of the frame is present is pressed and the pressing side of the pump chamber returns to its original position, the liquid in the refill pouch fills the pump chamber through the first slit of the first duckbill-type check valve, when the pressing side of the pump chamber is pressed, the liquid filled in the pump chamber is pushed out through the second slit of the second duckbill-type check valve, and when the pressing side of the pump chamber returns to its original position, the liquid in the refill pouch fills the pump chamber through the first slit of the first duckbill-type check valve. The hanging nozzle for refill pouches according to claim 1.

3. The elastic modulus of the pump chamber is equal to or greater than the elastic modulus of the first duckbill check valve. The hanging nozzle for refill pouches according to claim 1.

4. The valve further includes protrusions at both lower ends of the second duckbill check valve portion or at both lower ends of the outlet portion of the frame body, the protrusions providing a space for forming a liquid pool directly below the second slit. The hanging nozzle for refill pouches according to claim 1.

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