Mouth plug and liquid holding container

Abstract

To provide a mouth plug and a liquid holding container that can more suitably adjust liquid volume.SOLUTION: A mouth plug 20 has a nozzle portion 21 that protrudes outside a housing 11, a fixed portion 22 that is fixed to the film in a liquid-tight manner, and a flow adjustment portion 23 that protrudes inside the housing, and the flow adjustment portion is configured so that the lumen is deformable when an external force is applied at least partially from outside the housing.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a stopper and a liquid holding container.

Background Art

[0002] In recent years, in refill products of liquid products, the content volume has been increasing from the viewpoints of cost (economic efficiency) and consumer convenience (reduction in the number of purchases). A container made of film widely used in refill products can contribute to environmental measures by reducing the amount of plastic used.

[0003] On the other hand, since the film is flexible, its shape easily changes, and when it is enlarged, the shape change becomes more prominent, resulting in a decrease in the operability during the refilling operation.

[0004] In relation to this, for example, Patent Document 1 below discloses a pouch with a stopper provided with an outflow adjustment portion extending toward the inside of the pouch. According to this configuration, by pressing the film against the openings provided on both end faces of the outflow adjustment portion and penetrating the flow path of the stopper, the liquid amount when refilling into a refill bottle is adjusted.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the case of the configuration disclosed in Patent Document 1, since the liquid amount is adjusted by pressing the film against the opening, when the pouch is tilted during refilling, the film may shift due to the movement of the finger, and a gap may be formed between the opening and the film unintentionally, making it impossible to adjust the liquid amount suitably.

[0007] The present invention has been invented to solve the above problems, and an object thereof is to provide a stopper and a liquid holding container that can more preferably adjust the liquid volume when refilling a refill bottle.

Means for Solving the Problems

[0008] The above object of the present invention is achieved by the following means.

[0009] (1) A stopper provided on the pouring side of a container made of a film, having a storage portion inside, comprising: a nozzle portion protruding outside the storage portion; a fixing portion fixed to the film in a liquid-tight manner; and a flow rate adjusting portion protruding inside the storage portion, wherein the flow rate adjusting portion is configured such that the inner cavity can be deformed by applying an external force to at least a part thereof from outside the storage portion.

[0010] (2) The stopper according to (1), wherein the flow rate adjusting portion is configured such that the diameter of the inner cavity becomes smaller when an external force is applied.

[0011] (3) The stopper according to (1) or (2), wherein a concave portion or a convex portion is formed along the extending direction of the stopper on the outer periphery of the flow rate adjusting portion.

[0012] (4) The stopper according to any one of (1) to (3), wherein at least a certain range on the end side of the flow rate adjusting portion has a substantially circular shape or an elliptical shape when viewed from the flow rate adjusting portion toward the nozzle portion.

[0013] (5) The stopper according to any one of (1) to (4), wherein the wall thickness of the flow rate adjusting portion is thinner than the wall thickness of the nozzle portion.

[0014] (6) Near the fixed part of the flow rate adjusting part, a communication hole that communicates the inside and outside of the flow rate adjusting part is provided. The stopper according to any one of (1) to (5).

[0015] (7) On the lower end side of the flow rate adjusting part, a liquid volume adjusting hole that communicates the inside and outside of the flow rate adjusting part is provided. The stopper according to any one of (1) to (6).

[0016] (8) The film, and the stopper according to any one of (1) to (7), and A mark indicating the presence of the flow rate adjusting part is formed at the position on the film where the flow rate adjusting part is disposed. A liquid holding container.

[0017] (9) The film, and the stopper according to any one of (1) to (7), and The position on the film where the flow rate adjusting part is disposed is configured to be transparent or translucent so that the flow rate adjusting part can be visually recognized. A liquid holding container.

Advantages of the Invention

[0018] According to the above-described stopper, when a user applies an external force to the flow rate adjusting part, the inner cavity can be deformed to adjust the liquid volume. Therefore, when refilling the refill bottle, it is possible to prevent the liquid volume from being unintentionally adjusted, so that the liquid volume can be adjusted more preferably.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

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Figure 16

Figure 17

Figure 18

Figure 19

Embodiments for Carrying Out the Invention

[0020] Embodiments of the present invention will be described with reference to FIGS. 1 to 6. In the description of the drawings, the same elements are denoted by the same reference numerals, and duplicate descriptions are omitted. The dimensional ratios in the drawings are exaggerated for the convenience of explanation and may be different from the actual ratios.

[0021] FIG. 1 is a front view showing a liquid holding container 1 according to an embodiment of the present invention. FIG. 2 is a front view showing a mouth plug 20 according to an embodiment of the present invention. FIG. 3 is a side view showing the mouth plug 20 according to the present embodiment. FIG. 4 is a bottom view showing the mouth plug 20 according to the present embodiment. FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 2. FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 2.

[0022] The liquid holding container 1 stores contents such as detergents. As shown in FIG. 1, the liquid holding container 1 includes a container 10 made of a film and a mouth plug 20 provided on the pouring side of the container 10. Each component will be described below. The mouth plug 20 is a part for pouring out the contents stored in the container 10.

[0023] <Container 10> The container 10 includes an accommodation part 11 inside. The container 10 is formed integrally by overlapping a pair of films and sealing a part of the peripheries of the pair of films, except for a part, by heat sealing, and is configured in a bag shape. Note that the mouth plug 20 is attached to a part of the peripheries of the pair of films that is not heat sealed.

[0024] Note that the configuration of the container 10 is not limited to the above-described configuration, and a method of integrally forming by sealing the peripheries of the folded and overlapped parts of a single film may also be used.

[0025] A bottom-side film folded in two may be interposed between the pair of films. At this time, by arranging the bottom-side film so that the folded-back part faces the inside of the container 10, the bottom-side film is pushed and expanded downward by the weight of the contents stored in the container 10, so that the liquid holding container 1 can stand on its own.

[0026] The film constituting the container 10 is a laminate formed by laminating a base material and a seal layer.

[0027] As the base material (outer layer), for example, polypropylene, polyethylene terephthalate, nylon, ethylene-vinyl acetate copolymer or its saponified product can be used. The film may be unstretched, uniaxially stretched or biaxially stretched. When the material is nylon or polyethylene terephthalate, a biaxially stretched one is preferred because the mechanical strength is improved.

[0028] As the seal layer (inner layer), materials such as polyethylene (low density polyethylene, linear low density polyethylene, high density polyethylene) can be mentioned from the viewpoint of ease of heat sealing.

[0029] In addition, in order to improve the gas barrier property of the container 10, a barrier layer such as a metal foil, a metal vapor deposition layer (for example, an aluminum vapor deposition layer), or an inorganic vapor deposition layer may be further laminated as an intermediate layer in addition to the base material and the seal layer on the film. As the layer structure of the laminate, ONY / aluminum vapor deposition PET / LLDPE, PET / aluminum vapor deposition PET / ONY / LLDPE, PET / ONY / LLDPE, ONY / LLDPE, ONY / aluminum / LLDPE are preferred. Note that the layer structure is described in order from the outer layer. That is, in the case of "ONY / aluminum vapor deposition PET / LLDPE", the outer layer is ONY, the inner layer is LLDPE, and the intermediate layer between the outer layer and the inner layer is aluminum vapor deposition PET.

[0030] At the position where the flow rate adjustment part 23 of the mouth plug 20 in the container 10 is arranged, a mark indicating the presence of the flow rate adjustment part 23 is formed. The shape of the mark is not particularly limited, but for example, it may be circular, and a notation such as "push" may be provided near the circular shape.

[0031] The internal volume (filling volume) of the container 10 is not particularly limited, but is 1000 to 3500 mL. The maximum length in the width direction of the container 10 is not particularly limited, but is 200 to 250 mm. The maximum height of the container 10 is not particularly limited, but is 270 to 350 mm. The thickness of the container 10 is not particularly limited, but the outer layer is preferably 10 to 30 μm, the intermediate layer is preferably 10 to 30 μm, and the inner layer is preferably 80 to 200 μm. The total thickness is preferably 90 to 260 μm, and more preferably 150 to 210 μm. By using the container 10 with a large refill volume in this way, the operability such as "ease of pouring" and "liquid volume adjustment" during refilling is reduced, so the effect of the stopper 20 according to the embodiment of the present invention is likely to be exhibited.

[0032] <Stopper 20> As shown in FIG. 1, the stopper 20 is disposed at an unbonded portion of the peripheries of a pair of films of the container 10, and the fixing portion 22 is heat-sealed to the film together with the pair of films, thereby being integrated with the container 10.

[0033] As shown in FIGS. 2 and 3, the stopper 20 has a nozzle portion 21 protruding outside the accommodating portion 11, a fixing portion 22 fixed to the film in a liquid-tight manner, and a flow rate adjusting portion 23 protruding inside the accommodating portion 11.

[0034] As shown in FIGS. 2 and 3, a male screw portion 21A is formed on the outer periphery of the nozzle portion 21. By screwing a female screw portion of a cap (not shown) to the male screw portion 21A formed on the outer periphery of the nozzle portion 21, the cap is attached to the nozzle portion 21 to prevent the contents from spilling.

[0035] The fixing portion 22 is provided between the nozzle portion 21 and the flow rate adjusting portion 23.

[0036] In a state where the stopper 20 is attached to the container 10, the flow rate adjusting portion 23 is disposed so as to protrude inside the accommodating portion 11. According to this configuration, the flow rate adjusting portion 23 is not exposed to the outside.

[0037] The flow rate adjusting part 23 is configured such that the inner cavity 23H (see FIGS. 4 to 6) can be deformed when at least a part of an external force is applied from the outside of the accommodating part 11. The flow rate adjusting part 23 is configured to be more easily elastically deformable than the nozzle part 21.

[0038] In the present embodiment, in the state before the external force is applied, as shown in FIGS. 4 to 6, the inner cavity 23H of the flow rate adjusting part 23 has a substantially circular shape in a certain range on the end part 23E side, excluding the concave part 24, and is configured such that the content can easily pass through. On the other hand, when an external force is applied, the diameter of the inner cavity 23H becomes smaller, and the passage of the content becomes difficult. According to this configuration, when the user pinches the flow rate adjusting part 23, for example, with the thumb and index finger to apply an external force, the inner cavity 23H is deformed smaller, and the liquid amount at the time of refilling the refill bottle can be adjusted.

[0039] As a method for configuring the flow rate adjusting part 23 to be more easily elastically deformable than the nozzle part 21, in the present embodiment, as shown in FIG. 6, the wall thickness D1 of the flow rate adjusting part 23 is made thinner than the wall thickness D2 of the nozzle part 21. According to this configuration, in the case of integrally molding and manufacturing the mouth plug 20, the flow rate adjusting part 23 can be preferably configured to be more easily elastically deformable than the nozzle part 21.

[0040] As shown in FIGS. 3 and 5, the flow rate adjustment part 23 has a recessed part 24 that is recessed inward in the radial direction along the extending direction of the stopper 20 (the vertical direction in FIG. 2), a first branch part 26 that is provided above the recessed part 24 and branches into two branches, and a second branch part 27 that is provided below the recessed part 24 and branches into two branches. The user can press a portion other than the recessed part 24 in the circumferential direction of the flow rate adjustment part 23 inward in the radial direction to reduce the diameter of the inner cavity 23H of the flow rate adjustment part 23. By providing the recessed part 24, the first branch part 26, and the second branch part 27, when the user presses a portion other than the recessed part 24 in the circumferential direction of the flow rate adjustment part 23 inward in the radial direction, a desired shape can be obtained. According to this configuration, the flow rate adjustment part 23 is easily deformed along the shapes of the recessed part 24, the first branch part 26, and the second branch part 27, and it is possible to easily adjust the liquid amount when refilling the refill bottle.

[0041] As shown in FIGS. 2 and 6, near the fixed part 22 of the flow rate adjustment part 23, a communication hole 25 that communicates the inner cavity 23H of the flow rate adjustment part 23 and the outside is provided. For example, when the communication hole 25 is not formed in the flow rate adjustment part, when the content of the container 10 is small, even if the container is turned upside down to pour out the content, the flow rate adjustment part 23 extends, so the content cannot be poured out. On the other hand, since the communication hole 25 is formed near the fixed part 22 in the flow rate adjustment part 23 according to the present embodiment, even when the content of the container 10 is small, by turning the liquid holding container 1 upside down, the content can be preferably poured out through the communication hole 25, and the remaining amount after refilling can be reduced.

[0042] Examples of the material constituting the stopper 20 include olefin resins such as PE and PP, which are commonly used. Further, in order to facilitate deformation, a soft resin such as an elastomer having more elastic properties or a mixture thereof may be used. Also, a soft material different from other parts may be used only for the flow rate adjustment part 23 by two-color molding or the like.

[0043] Next, a method for pouring the liquid holding container 1 according to the present embodiment into a refill bottle will be described.

[0044] First, when pouring the contents stored in the liquid holding container 1 into the refill bottle, the user holds the flow rate adjusting portion 23 between the thumb and the index finger, tilts the liquid holding container 1 with the inner cavity 23H of the flow rate adjusting portion 23 reduced, and pours out the liquid. For this reason, the uneasiness at the start of pouring can be reduced.

[0045] Then, when the liquid holding container 1 is tilted to a stable angle, by reducing or making zero the external force applied to the flow rate adjusting portion 23, the inner cavity 23H of the flow rate adjusting portion 23 is enlarged, and the contents are poured out. For this reason, the ease of flow rate adjustment is improved.

[0046] Then, when the amount of the contents to be poured into the refill bottle approaches the desired amount, the user again holds the flow rate adjusting portion 23 between the thumb and the index finger to reduce the inner cavity 23H of the flow rate adjusting portion 23, reduce the flow rate of the contents, and when the desired amount is reached, return the liquid holding container 1 to its original position and stop pouring.

[0047] As described above, the stopper 20 according to the present embodiment includes an accommodating portion 11 inside, and is a stopper 20 provided on the pouring side of the container 10 made of a film. The stopper 20 has a nozzle portion 21 protruding outside the accommodating portion 11, a fixing portion 22 fixed to the film in a liquid-tight manner, and a flow rate adjusting portion 23 protruding inside the accommodating portion 11. The flow rate adjusting portion 23 is configured such that the inner cavity 23H can be deformed when at least a part of an external force is applied from outside the accommodating portion 11. According to the stopper 20 configured in this way, the user can deform the inner cavity 23H by applying an external force to the flow rate adjusting portion 23 to adjust the liquid amount. Therefore, it is possible to prevent the liquid amount from being inadvertently adjusted, and thus the liquid amount can be adjusted more preferably.

[0048] Further, the flow rate adjusting portion 23 is configured such that the diameter of the inner cavity 23H becomes smaller when an external force is applied. According to the stopper 20 configured in this way, the usability of the user is improved.

[0049] Further, a recess 24 is formed along the extending direction of the stopper 20 on the outer periphery of the flow rate adjusting portion 23. According to the stopper 20 configured in this manner, the flow rate adjusting portion 23 is likely to be deformed along the shape of the recess 24, and the liquid volume can be easily adjusted.

[0050] Also, the thickness D1 of the flow rate adjusting portion 23 is thinner than the thickness D2 of the nozzle portion 21. According to the stopper 20 configured in this manner, when the stopper 20 is integrally molded and manufactured, the flow rate adjusting portion 23 can be preferably configured to be more easily elastically deformable than the nozzle portion 21.

[0051] Also, a communication hole 25 that communicates the inside and the outside of the flow rate adjusting portion 23 is provided near the fixing portion 22 of the flow rate adjusting portion 23. According to the stopper 20 configured in this manner, even when the content of the container 10 is small, the content can be preferably poured out by turning the liquid holding container 1 upside down.

[0052] Also, as described above, the liquid holding container 1 according to the present embodiment has a film and the above-described stopper 20, and a mark indicating the presence of the flow rate adjusting portion 23 is formed at the position where the flow rate adjusting portion 23 is disposed in the film. According to the liquid holding container 1 configured in this manner, the user can recognize the presence of the flow rate adjusting portion 23, and the liquid volume can be preferably adjusted using the flow rate adjusting portion 23.

[0053] <The stopper 120 according to Modification 1> Next, with reference to FIGS. 7 to 11, the configuration of the stopper 120 according to Modification 1 will be described. FIG. 7 is a front view showing the stopper 120 according to Modification 1. FIG. 8 is a side view showing the stopper 120 according to Modification 1. FIG. 9 is a bottom view showing the stopper 120 according to Modification 1. FIG. 10 is a cross-sectional view taken along line 10-10 of FIG. 7. FIG. 11 is a cross-sectional view taken along line 11-11 of FIG. 7.

[0054] As shown in FIGS. 7 and 8, the stopper 120 according to Modification 1 has a nozzle portion 21 protruding outside the housing portion 11, a fixing portion 22 fixed to the film in a liquid-tight manner, and a flow rate adjusting portion 123 protruding inside the housing portion 11. Since the nozzle portion 21 and the fixing portion 22 have the same configurations as the nozzle portion 21 and the fixing portion 22 of the stopper 20 according to the above-described embodiment, the description thereof is omitted.

[0055] The flow rate adjusting portion 123 is configured such that the inner cavity 123H (see FIGS. 9 to 11) can be deformed when at least a part of an external force is applied from outside the housing portion 11.

[0056] In the above-described embodiment, the flow rate adjusting portion 23 had the concave portion 24, but the flow rate adjusting portion 123 according to Modification 1 has a convex portion 124 along the extending direction of the stopper 120 (the vertical direction in FIG. 7) as shown in FIGS. 7, 8, and 10. The user can press a portion other than the convex portion 124 in the circumferential direction of the flow rate adjusting portion 123 inward in the radial direction to reduce the diameter of the inner cavity 123H of the flow rate adjusting portion 123. According to this configuration, the flow rate adjusting portion 123 is easily deformed along the shape of the convex portion 124, and the liquid amount can be easily adjusted.

[0057] <The stopper 220 according to Modification 2> Next, with reference to FIGS. 12 to 15, the configuration of the stopper 220 according to Modification 2 will be described. FIG. 12 is a front view showing the stopper 220 according to Modification 2. FIG. 13 is a side view showing the stopper 220 according to Modification 2. FIG. 14 is a bottom view showing the stopper 220 according to Modification 2. FIG. 15 is a cross-sectional view taken along line 15-15 of FIG. 12.

[0058] As shown in FIGS. 12 and 13, the stopper 220 according to Modification 2 has a nozzle portion 21 protruding outside the housing portion 11, a fixing portion 22 fixed to the film in a liquid-tight manner, and a flow rate adjusting portion 223 protruding inside the housing portion 11. Since the nozzle portion 21 and the fixing portion 22 have the same configurations as the nozzle portion 21 and the fixing portion 22 of the stopper 20 according to the above-described embodiment, the description thereof is omitted.

[0059] The flow rate adjustment part 223 is configured such that the inner cavity 223H (see FIGS. 14 and 15) can be deformed when at least a part of an external force is applied from the outside of the housing part 11.

[0060] As shown in FIG. 14, the flow rate adjustment part 223 has an elliptical shape when viewed from below in a certain range on the end part 223E side (the lower side in FIG. 12). According to this configuration, the user can pinch the short diameter side of the ellipse to reduce the inner cavity 223H of the flow rate adjustment part 223, and the flow rate adjustment part 223 can be easily deformed.

[0061] Also, as shown in FIG. 12, a liquid volume adjustment hole 225 that communicates the inside and outside of the flow rate adjustment part 223 is provided on the lower end part side (the lower side in FIG. 12) of the flow rate adjustment part 223. By providing the liquid volume adjustment hole 225 in this way, even when there is a concern that the flow rate adjustment part 223 has an elliptical shape when viewed from below and the discharge property may deteriorate, it is possible to prevent the deterioration of the discharge property. Also, when it is desired to pour out less of the content, a small amount can be poured out by suppressing the liquid volume adjustment hole 225.

[0062] <Example> The effects of the present invention will be described using the following examples and comparative examples. Note that the present invention is not limited to the following examples.

[0063] As Example 1, the stopper 20 described in the embodiment was prepared. As Example 2, the stopper 220 described in Modification 2 was prepared. As Example 3, a stopper without the communication hole 25 of the stopper 20 shown in FIG. 2 was prepared. As a comparative example, a stopper without the flow rate adjustment part 23 of the stopper 20 shown in FIG. 2 was prepared and attached to the container 10, respectively.

[0064] As the container 10, one with L×H = 200×340 mm (folding width 60 mm) was prepared and filled with 1900 g of the content. As the material of the container 10, for the body part, ONY 15 μm (base material layer), aluminum vapor-deposited PET 12 μm (barrier layer), and LLDPE 150 μm (sealing layer) were used, and for the bottom part, ONY 25 μm (base material layer) and LLDPE 180 μm (sealing layer) were used.

[0065] In the stopper, a stopper with an inner diameter of the nozzle part of 8.7 mm, a wall thickness of the nozzle part of 1.0 mm, and a wall thickness of the flow rate adjusting part of 0.5 mm was used. The material of the stopper was PP.

[0066] As the refill bottle, an opaque bottle with a nozzle cap (nozzle cap hole diameter: 25.0×11.5 mm) having a full filling capacity of 637 mL was prepared. In addition, a translucent part where the liquid level can be visually recognized was provided on the side surface of the bottle.

[0067] As the content to be stored in the container, a cleaning agent (Top Clear Liquid, manufactured by Lion Corporation) having a viscosity of 8 mPa·s (25 °C, B-type viscometer) was prepared.

[0068] <Usability Evaluation> As a method for evaluating usability, when refilling the refill bottle using each stopper, the usability was confirmed by a 7-level absolute evaluation (7 points: very good ~ 4 points: neither good nor bad ~ 1 point: very bad). As the usability evaluation, two items, the absence of anxiety at the start of pouring and the ease of adjusting the liquid volume, were evaluated for 9 people.

[0069] As the evaluation result of the absence of anxiety at the start of pouring, for the stopper according to Example 1, the average score was 5.8 points, for the stopper according to Example 2, the average score was 5.8 points, and for the stopper according to the comparative example, the average score was 4.3 points. From this result, it was found that the anxiety at the start of pouring was reduced for the stoppers according to the examples.

[0070] As the evaluation result of the ease of adjusting the liquid volume, for the stopper according to Example 1, the average score was 5.3 points, for the stopper according to Example 2, the average score was 5.2 points, and for the stopper according to the comparative example, the average score was 4.6 points. From this result, it was found that the ease of adjusting the liquid volume was improved for the stoppers according to the examples.

[0071] <Accuracy of Refill Amount> As a method for evaluating the accuracy of the refill amount, the filling amount and the standard deviation were measured for 5 persons when refilling the refill bottle using each stopper. A line was drawn with a magic marker at the 500 g filling amount of the refill bottle, and refilling was performed with this as a reference.

[0072] As a result of the evaluation of the accuracy of the refill amount, for the stopper according to Example 1, the average filling amount was 505.4 g and the standard deviation was 5.0 g. For the stopper according to Example 2, the average filling amount was 504.1 g and the standard deviation was 5.7 g. For the stopper according to the comparative example, the average filling amount was 509.3 g and the variation was 20.2 g. From this result, it was found that the accuracy of the refill amount was improved with the stoppers according to the examples.

[0073] <Residual amount of the container after refilling> Using the stoppers of Example 1 and Example 3, the residual amount of the containers after all refilling was measured for 5 persons. For the stopper according to Example 1, the average residual amount was 3.4 g. For the stopper according to Example 3, the average residual amount was 11.2 g. From this result, by providing a communication hole like the stopper of Example 1, the residual amount of the container after refilling could be reduced.

[0074] Note that the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims.

[0075] For example, in the above-described embodiment, the flow rate adjustment unit 12 was configured such that the diameter of the inner cavity 23H became smaller when an external force was applied. However, it is not limited to this, and the flow rate adjustment unit 323 of the stopper 320 may be configured such that, as shown in FIGS. 16 and 17, it is clamped between the user's thumb and index finger above and below in FIG. 17 and an external force is applied to increase the diameter of the inner cavity. That is, in this configuration, in a state where no external force is applied, the diameter of the inner cavity 323H becomes smaller and it becomes difficult for the content to pass through, while in a state where an external force is applied, the diameter of the inner cavity 323H becomes larger and the content passes through easily.

[0076] Also, in the above-described embodiment, a mark indicating the presence of the flow rate adjustment unit 23 was formed at the position on the film of the container 10 where the flow rate adjustment unit 23 is disposed. However, the position on the film of the container 10 where the flow rate adjustment unit 23 is disposed may be configured to be transparent or translucent so that the flow rate adjustment unit 23 is visible.

[0077] In addition, the shape of the concave portion 324 described in the embodiment is not limited to the configuration shown in FIG. 5, and as shown in FIG. 18, it may be configured to be provided over a long distance in the circumferential direction. Further, the shape of the convex portion 424 described in the first modification is not limited to the configuration shown in FIG. 10, and as shown in FIG. 19, it may be configured to be provided large in the radial direction.

[0078] Also, in the above-described embodiment, the wall thickness of the flow rate adjustment unit 23 is made thinner than the wall thickness of the nozzle unit 21 so that the flow rate adjustment unit 23 is more easily elastically deformed than the nozzle unit 21. However, the material of the flow rate adjustment unit may be made softer than the material of the nozzle unit so that the flow rate adjustment unit is more easily elastically deformed than the nozzle unit.

Explanation of Reference Numerals

[0079] 1 Liquid holding container, 10 Container, 11 Accommodating portion, 20, 120, 220, 320 Stopper, 21 Nozzle portion, 22 Fixing portion, 23, 123, 223, 323 Flow rate adjustment unit, 23E, 223E End side 23H, 123H, 223H, 323H Inner cavity, 24, 324 Concave portion, 25 Communication hole, 124, 424 Convex portion, 225 Liquid volume adjustment hole, D1 Wall thickness of the flow rate adjustment unit, D2 Wall thickness of the nozzle portion,

Claims

1. A stopper provided on the pouring side of a container made of a film, having a storage portion therein, comprising: a nozzle portion protruding outside the storage portion; a fixing portion fixed to the film in a liquid-tight manner; and a flow rate adjusting portion protruding inside the storage portion, wherein the flow rate adjusting portion is configured such that its inner cavity can be deformed when an external force is applied to at least a part thereof from outside the storage portion.

2. The stopper according to claim 1, wherein the flow rate adjusting portion is configured such that the diameter of the inner cavity becomes smaller when an external force is applied.

3. The stopper according to claim 1 or 2, wherein a concave portion or a convex portion is formed along the extending direction of the stopper on the outer periphery of the flow rate adjusting portion.

4. The stopper according to claim 1 or 2, wherein at least a certain range on the end side of the flow rate adjusting portion has a substantially circular shape or an elliptical shape when viewed from the flow rate adjusting portion toward the nozzle portion.

5. The stopper according to claim 1 or 2, wherein the wall thickness of the flow rate adjusting portion is thinner than the wall thickness of the nozzle portion.

6. The stopper according to claim 1 or 2, wherein a communication hole for communicating the inside and the outside of the flow rate adjusting portion is provided near the fixing portion of the flow rate adjusting portion.

7. The stopper according to claim 4, wherein a liquid volume adjusting hole for communicating the inside and the outside of the flow rate adjusting portion is provided on the lower end side of the flow rate adjusting portion.

8. a film; and the stopper according to claim 1 or 2, wherein a mark indicating the presence of the flow rate adjusting portion is formed at a position on the film where the flow rate adjusting portion is disposed.

9. the film; having the stopper according to claim 1 or 2, A liquid holding container, wherein a position of the film where the flow rate adjusting unit is disposed is configured to be transparent or translucent so that the flow rate adjusting unit is visible.

Images