Two-liquid mixing container and method of manufacturing the two-liquid mixing container

Abstract

To provide a two-component liquid mixing container in which a content becomes usable after two liquids are mixed, and a method for producing the two-component liquid mixing container.SOLUTION: A two-component liquid mixing container 100 according to the present disclosure includes a first container body 10 having a first storage space S1 for storing a first liquid A, a second container body 20 fitted to the first container body 10 and having a second storage space S2 for storing a second liquid B, and a cap 30 for closing the second storage space S2. The second container body 20 includes an outer wall part 21 fitted to a mouth part 11 of the first container body 10, an inner wall part 25 provided radially inside of the outer wall part 21, and a bottom wall part 27 connected to lower parts of the outer wall part 21 and the inner wall part 25 to divide and form the second storage space S2. A weakened part 27a is provided at the bottom wall part 27. The cap 30 is engaged so as to make it impossible to rotate at least in one direction around a central axial line O with respect to an upper part of the inner wall part 25, and fitting of the cap 30 is released by rotation of the cap 30 at least in one direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a two-liquid mixing container that can store two liquids in a separated state and mix them when used, and a method for manufacturing the two-liquid mixing container. [Background technology]

[0002] Some medicines, beverages, and the like that require mixing of a first liquid and a second liquid lose their effectiveness or flavor if not mixed immediately before use, and in such cases, the first liquid and the second liquid must be stored in separate containers and mixed immediately before use.As an example of a container that can be used in this way, Patent Document 1 discloses a two-liquid mixing container in which a second container body 3 is connected to the top of a first container body 2 via a first connecting member 4 and a second connecting member 5, and the first container body 2 is rotated and lowered to connect the inside of the first container body 2 to the inside of the second container body 3, thereby mixing the two liquids. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Specification of Utility Model Application Publication No. 5-51735 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the two-liquid mixing container described in Patent Document 1, the contents in the second container 3 can be poured out through the nozzle 8 by opening the nozzle cap 9, even if the first container 2 and the second container 3 are not necessarily connected to each other. Therefore, contrary to the manufacturer's intention, users may end up using only the second liquid without mixing the first and second liquids. This may prevent the contents from achieving their intended effects, and there is room for improvement in this regard.

[0005] The present disclosure aims to solve these problems, and its purpose is to propose a two-liquid mixing container and a method for manufacturing a two-liquid mixing container that allows the contents to be used after the two liquids are mixed. [Means for solving the problem]

[0006] The two-liquid mixing container of the present disclosure comprises: a first container body having a first storage space for storing a first liquid; a second container body attached to the opening of the first container body and having a second storage space for storing a second liquid; a cap attached to the first container body or the second container body and closing the second storage space from above; Equipped with The second container body is the mouth of the first container body Engages the outer surface of an outer wall portion to be attached; an inner wall portion provided radially inward of the outer wall portion; a bottom wall portion connected to lower portions of the outer wall portion and the inner wall portion and defining the second storage space; and The bottom wall portion is provided with a weakened portion, When the cap is attached, the cap is engaged with the upper part of the inner wall portion so as to be unable to rotate in at least one direction around the central axis, rotation of the cap in at least one direction releases the cap; The cap is attached to the first container body by threaded engagement, and when the cap is attached, the upper part of the inner wall portion has a ratchet mechanism that rotates in accordance with the cap when rotated around the central axis in a direction to release the threaded engagement of the cap, but does not rotate in accordance with the cap when rotated around the central axis in a direction to tighten the threaded engagement of the cap.

[0008] In addition, in the two-liquid mixing container of the present disclosure, in the above configuration, a first tooth portion that engages with the cap is provided on an outer circumferential surface of the inner wall portion, a second tooth portion that engages with the inner wall portion is provided on an inner peripheral surface of the engagement cylindrical portion that hangs down from the top wall of the cap; It is preferable that the first tooth portion has a first locking surface that locks the second tooth portion when the cap rotates in the direction to release the threaded engagement, and a first inclined surface that is inclined radially outward relative to the circumferential direction and guides the second tooth portion radially outward when the cap rotates in the direction to tighten the threaded engagement.

[0009] Furthermore, in the two-liquid mixing container of the present disclosure, in the above configuration, it is preferable that a first tooth portion that engages with the cap is provided on the outer peripheral surface of the inner wall portion, and a second tooth portion that engages with the inner wall portion is provided on the inner peripheral surface of the engaging cylindrical portion that hangs down from the top wall of the cap, and that the second tooth portion has a second engaging surface that engages the first tooth portion when the cap rotates in the direction to release the threaded engagement, and a second inclined surface that is inclined radially inward relative to the circumferential direction and guides the first tooth portion radially inward when the cap rotates in the direction to tighten the threaded engagement.

[0010] In addition, in the two-component mixing container of the present disclosure having the above configuration, it is preferable that the weakened portion extends in the circumferential direction.

[0011] Further, the method for manufacturing a two-liquid mixing container of the present disclosure includes the steps of: A method for manufacturing a two-liquid mixing container comprising a first container body having a first storage space for storing a first liquid, a second container body having a second storage space for storing a second liquid, and a cap for closing the second storage space from above, comprising: storing a first liquid in the first storage space; attaching the second container body to the opening of the first container body; storing a second liquid in the second storage space; a step of attaching the cap to the first container body or the second container body to close the second storage space from above; Including, The second container body is the mouth of the first container body Engages the outer surface of an outer wall portion to be attached; an inner wall portion provided radially inward of the outer wall portion; a bottom wall portion connected to lower portions of the outer wall portion and the inner wall portion and defining the second storage space; and The bottom wall portion is provided with a weakened portion, When the cap is attached, the cap is engaged with the upper part of the inner wall portion so as to be unable to rotate in at least one direction around the central axis, rotation of the cap in at least one direction releases the cap; The cap is attached to the first container body by threaded engagement, and when the cap is attached, the upper part of the inner wall portion has a ratchet mechanism that rotates in accordance with the cap when rotated around the central axis in a direction to release the threaded engagement of the cap, but does not rotate in accordance with the cap when rotated around the central axis in a direction to tighten the threaded engagement of the cap. [Effects of the Invention]

[0012] According to the present disclosure, it is possible to propose a two-liquid mixing container in which the contents can be used after the two liquids are mixed, and a method for manufacturing the two-liquid mixing container. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a half cross-sectional view of a two-liquid mixing container according to an embodiment of the present disclosure. FIG. [Figure 2] FIG. 4 is a plan view of a first tooth portion of the second container body. [Figure 3] FIG. 10 is a bottom view of the second tooth portion of the cap. [Figure 4] 2 is a diagram showing a state in which the cap in FIG. 1 is opened to break the weakened portion, causing the second liquid in the second containing space to mix with the first liquid. FIG. [Figure 5] FIG. 10 is a view showing the state in which the cap has been removed after the first and second liquids have been mixed. [Figure 6] FIG. 6 is a diagram showing a state in which a pump nozzle is attached to the two-liquid mixing container of FIG. 5. [Figure 7] 1 is a flowchart showing the steps of a method for manufacturing a two-liquid mixing container according to an embodiment of the present disclosure. [Figure 8] FIG. 10 is a view showing a state in which the second container body is attached to the opening of the first container body filled with the first liquid. [Figure 9] FIG. 10 is a view showing a state in which the cap is attached after the second container body has been filled with the second liquid. [Figure 10] 10 is a flowchart showing the procedure for carrying out a method (modified example) for manufacturing a two-liquid mixing container according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present disclosure will be described in more detail below with reference to the drawings.

[0015] A two-liquid mixing container 100, which is one embodiment of the present disclosure shown in Figure 1, comprises a first container body 10 having a first storage space S1 for storing a first liquid A, a second container body 20 that is attached to the mouth portion 11 of the first container body 10 and has a second storage space S2 for storing a second agent, and a cap 30 that is attached to the mouth portion 11 of the first container body 10 to close the second storage space S2 from above.

[0016] In this specification, claims, abstract, and drawings, the side where the cap 30 is located is referred to as the upper side (upper side in Fig. 1), and the side where the first container body 10 is located is referred to as the lower side (lower side in Fig. 1). Furthermore, the radially outward direction refers to the direction away from the central axis O along a straight line passing through the central axis O of the two-liquid mixing container 100 in Fig. 1 and perpendicular to the central axis O, and the radially inward direction refers to the direction toward the central axis O along that straight line.

[0017] The first container body 10 is a container body having a first storage space S1 for storing a first liquid A, and is equipped with a cylindrical mouth portion 11 to which a second container body 20 and a cap 30 (described later) are fixed, a substantially cylindrical body portion 13 that is connected to the mouth portion 11 via a shoulder portion 17 and forms the first storage space S1, and a bottom portion 15 that closes the lower end of the body portion 13. From approximately the center height downward of the mouth portion 11, the outer peripheral surface is provided with a male thread portion 11a that threadably engages with a female thread portion 31a provided on the inner peripheral surface of the outer peripheral wall 31 of the cap 30 to secure the cap 30 to the first container body 10. In addition, the outer peripheral surface at the upper part of the mouth portion 11 is provided with an engaging protrusion 11b that undercuts and engages with a peripheral wall 21a of the second container body 20 (described later), and an anti-rotation rib 11c that circumferentially secures the second container body 20 to the mouth portion 11. Further, below the male thread portion 11a, there is provided an abutment ring 11e against which the female thread portion 31a abuts when threading the cap 30 onto the mouth portion 11, thereby completing the threaded engagement.

[0018] The first container body 10 may be made of various thermoplastic resins such as polyolefin, polyester, polyether, or polystyrene, or glass.

[0019] The second container body 20 comprises an outer wall portion 21 attached to the mouth portion 11 of the first container body 10, an inner wall portion 25 provided radially inward of the outer wall portion 21, and a bottom wall portion 27 connected to the lower portion of the outer wall portion 21 and the inner wall portion 25 to define a second storage space S2.

[0020] The outer wall portion 21 has a peripheral wall 21a that covers the upper part of the mouth 11 of the first container body 10 from the radial outside and is attached to the mouth 11, an erected wall 21b that erects further upward from the upper end of the peripheral wall 21a via a connecting wall 22, and an outer storage wall 23 that hangs down from the inner peripheral end of the connecting wall 22 on the radial inside of the peripheral wall 21a. The inner peripheral surface of the peripheral wall 21a is provided with engaging protrusions 21d that undercut-engage with the engaging protrusions 11b of the mouth 11, and intermittent ribs 21c that are formed intermittently in the circumferential direction above the engaging protrusions 21d and fit between the anti-rotation ribs 11c of the mouth 11 to prevent rotation of the second container body 20 about the central axis O relative to the first container body 10.

[0021] The inner wall portion 25 has an accommodating inner wall 25a provided radially inward of the accommodating outer wall 23, a central top wall 28 extending substantially horizontally radially inward from the upper end of the accommodating inner wall 25a, and an engaging cylindrical wall 29 erected upward from the central top wall 28. In addition, first teeth 29a that engage with the cap 30 are provided on the outer peripheral surface of the engaging cylindrical wall 29. In this embodiment, the first teeth 29a are provided at six equally spaced locations in the circumferential direction as shown in FIG. 2, and one circumferential end is provided with a first locking surface 29b that locks with second teeth 37a of the cap 30, which will be described later. As shown in Figure 2, the first engagement surface 29b is oriented approximately radially and extends vertically, and when the cap 30 is rotated in the opening direction around the central axis O, it abuts against the second engagement surface 37b provided on the second tooth portion 37a of the cap 30 described later, thereby preventing relative rotation of the cap 30 with respect to the second container body 20.

[0022] On the other hand, as shown in FIG. 2, the other circumferential end of the first teeth 29a is provided with a first inclined surface 29c that is inclined radially outward relative to the circumferential direction. When the cap 30 is rotated in the fastening direction around the central axis, the first inclined surface 29c guides the second teeth 37a of the cap 30 radially outward, thereby enabling the second teeth 37a to easily ride over the first teeth 29a. With this configuration, when the cap 30 is rotated in the fastening direction around the central axis, the cap 30 is rotatable relative to the second container body 20. Therefore, the upper portion (first teeth 29a) of the inner wall portion 25 of the second container body 20 does not follow the rotation of the cap 30 (second teeth 37a).

[0023] As shown in FIG. 1, the second housing space S2 is a cylindrical region defined by the housing outer wall 23 (outer wall portion 21), the housing inner wall 25a (inner wall portion 25), and a bottom wall portion 27 connected to the lower portions of the housing outer wall 23 and the housing inner wall 25a. The bottom wall portion 27 is provided with a weakened portion 27a extending in the circumferential direction at a radial position between the housing outer wall 23 and the housing inner wall 25a. As shown in FIG. 1, the weakened portion 27a is a portion that is thinner in the thickness direction than other regions of the bottom wall portion 27. As will be described later, when the cap 30 is rotated around the central axis O in a direction in which the cap 30 is opened, the inner wall portion 25 of the second container body 20 is prevented from rotating relative to the cap 30 by a ratchet mechanism having first teeth 29a and second teeth 37a. On the other hand, the outer wall 21 of the second container body 20 is prevented from rotating relative to the first container body 10 by the engagement of the anti-rotation rib 11c and the intermittent rib 21c. Therefore, when the cap 30 is rotated relative to the first container body 10 in a direction in which the cap 30 is opened, a circumferential shear stress acts between the outer wall 21 and the inner wall 25 of the second container body 20. This causes the weakened portion 27a of the bottom wall 27 to break, and the inner wall 25 is lifted upward together with the cap 30 as described below, so that the second liquid B in the second storage space S2 leaks downward from the gap between the inner wall 25 and the outer wall 21 and mixes with the first liquid A (see FIG. 4).

[0024] The second container body 20 can be made of various thermoplastic resins such as polyolefin, polyester, polyether, or polystyrene.

[0025] As shown in Figure 1, when the cap 30 is attached to the first container body 10, it has an outer wall 31 that surrounds the mouth portion 11 from the radial outside, and a top wall 33 that closes the upper end of the outer wall 31.

[0026] The inner peripheral surface of the outer peripheral wall 31 is provided with a female thread 31a that threadably engages with a male thread 11a provided on the mouth 11 of the first container body 10. A seal wall 35 that fits into the inner peripheral surface of the upright wall 21b of the second container body 20 hangs down from the underside of the top wall 33. An engagement cylindrical portion 37 hangs down from the top wall 33 radially inward of the seal wall 35, and the inner peripheral surface of the engagement cylindrical portion 37 is provided with second teeth 37a that engage with first teeth 29a on the inner wall portion 25 of the second container body 20 to form a ratchet mechanism. A fitting cylindrical portion 39 hangs down from the top wall 33 radially inward of the engagement cylindrical portion 37, and fits into the inner peripheral surface of the engagement cylindrical wall 29 of the second container body 20, with the lower part of the fitting cylindrical portion 39 making undercut engagement with the inner peripheral surface of the engagement cylindrical wall 29. This configuration prevents the inner wall portion 25 of the second container body 20 from easily separating downward from the cap 30. The standing wall 21b and the sealing wall 35, as well as the engaging cylindrical wall 29 and the fitting cylindrical portion 39, are rotatable relative to each other around the central axis O.

[0027] 3, the second teeth 37a provided on the inner peripheral surface of the engaging cylindrical portion 37 are provided at six equally spaced locations in the circumferential direction, and one end in the circumferential direction is provided with a second locking surface 37b that locks with the first teeth 29a of the second container body 20. As shown in FIG. 3, the second locking surface 37b is oriented in a substantially radial direction and extends in a vertical direction, and when the cap 30 is rotated in the opening direction around the central axis O, the second locking surface 37b comes into contact with the first locking surface 29b provided on the first teeth 29a of the second container body 20, thereby preventing relative rotation of the cap 30 with respect to the second container body 20.

[0028] On the other hand, the other circumferential end of the second teeth 37a is provided with a second inclined surface 37c that is inclined radially inward relative to the circumferential direction, as shown in Fig. 3. When the cap 30 is rotated in the fastening direction about the central axis, the second inclined surface 37c guides the first teeth 29a of the second container body 20 radially inward, thereby enabling the second teeth 37a to easily ride over the first teeth 29a. With this configuration, when the cap 30 is rotated in the fastening direction about the central axis, the cap 30 is rotatable relative to the second container body 20.

[0029] The cap 30 may be made of various thermoplastic resins such as polyolefin, polyester, polyether, or polystyrene.

[0030] When using the two-liquid mixing container 100 having the above configuration, as shown in FIG. 4, a user rotates the cap 30 relative to the first container body 10 about the central axis O to release the threaded engagement between the cap 30 and the first container body 10 and open the cap 30. At this time, the first toothed portion 29a of the inner wall portion 25 of the second container body 20 and the second toothed portion 37a of the cap 30 are prevented from rotating relative to each other because the first locking surface 29b and the second locking surface 37b abut against each other. The outer wall portion 21 of the second container body 20 is also prevented from rotating relative to the first container body 10 by the engagement of the anti-rotation rib 11c and the intermittent rib 21c. Therefore, as shown in FIG. 4, when the cap 30 is rotated relative to the first container body 10 in the direction of opening the cap 30, a circumferential shear stress acts between the outer wall portion 21 and the inner wall portion 25 of the second container body 20. As a result, the weakened portion 27a of the bottom wall portion 27 is subjected to circumferential shear stress and breaks, and the second liquid B in the second storage space S2 leaks downward through the broken weakened portion 27a and mixes with the first liquid A.

[0031] When the second liquid B in the second storage space S2 is mixed with the first liquid A in the first storage space S1, the user removes the cap 30 and the inner wall portion 25 that has been separated from the outer wall portion 21 due to the rupture of the weakened portion 27a from the first container body 10 (see Figure 5).

[0032] Instead of the removed cap 30, the user may fix a nozzle 60 with a pump 50, as shown in Fig. 6, to the first container body 10 using the attachment cap 40. When attaching the attachment cap 40 to the first container body 10, the female thread portion 41a provided on the inner peripheral surface of the outer peripheral wall 41 is threadably engaged with the male thread portion 11a provided on the opening 11 of the first container body 10. This allows the user to operate the pump 50 by pressing the nozzle 60, and to spray the mixture of the first liquid A and the second liquid B in the first storage space S1 out through the nozzle hole 61 for use.

[0033] Next, a method for manufacturing the two-liquid mixing container 100 according to this embodiment will be described with reference to FIGS.

[0034] When manufacturing the two-liquid mixing container 100 according to this embodiment, first, the first liquid A, which is the content, is filled into the first accommodation space S1 of the first container body 10 through the opening 11 (step S101 in FIG. 7).

[0035] Next, the second container body 20 shown in the upper part of Fig. 8 is attached to the mouth 11 of the first container body 10 filled with the first liquid A shown in the lower part of Fig. 8, which was prepared in step S101 (step S102 in Fig. 7). When attaching the second container body 20 to the first container body 10, the engaging protrusions 21d on the inner peripheral surface of the peripheral wall 21a of the second container body 20 are undercut-engaged with the engaging protrusions 11b on the outer peripheral surface of the mouth 11 of the first container body 10, and the intermittent ribs 21c of the second container body 20 are inserted between the anti-rotation ribs 11c of the first container body 10. This fixes the second container body 20 to the first container body 10 in the vertical and circumferential directions.

[0036] Next, the second storage space S2 in the assembly of the first container body 10 and the second container body 20 prepared in step S102 is filled with the second liquid B (step S103). As a result, the first storage space S1 and the second storage space S2 are filled with the first liquid A and the second liquid B, respectively, as shown in the lower part of FIG.

[0037] 9, the cap 30 is attached to the assembly of the first container body 10 and the second container body 20 manufactured in step S103 to close the second storage space S2 (step S104). The cap 30 is attached by threading the female thread portion 31a provided on the inner peripheral surface of the outer peripheral wall 31 into the male thread portion 11a provided on the opening 11 of the first container body 10. At this time, the second inclined surface 37c of the second tooth portion 37a of the cap 30 can abut against and overcome the first inclined surface 29c of the second container body 20, so that the cap 30 can be attached to the first container body 10 by threading while rotating it relative to the second container body 20. Furthermore, since the lower portion of the fitting cylindrical portion 39 on the cap 30 side is undercut-engaged with the inner peripheral surface of the engaging cylindrical wall 29, when the cap 30 is opened as shown in Fig. 4, the inner wall portion 25 of the second container body 20 moves away from the outer wall portion 21 while still engaging with the cap 30. Through the above steps, the manufacture of the two-liquid mixing container 100 shown in Fig. 1 is completed.

[0038] Next, a modified example of the method for manufacturing the two-liquid mixing container 100 according to this embodiment will be described with reference to FIG.

[0039] First, the first liquid A, which is the content, is filled into the first accommodation space S1 of the first container body 10 through the opening 11 (step S201 in FIG. 10).

[0040] Next, the second storage space S2 of the second container body 20, which has been prepared separately from the first container body 10 of step S201, is filled with the second liquid B (step S202 in FIG. 10). As a result, the first storage space S1 and the second storage space S2 of the first container body 10 and the second container body 20, which have been prepared separately, are filled with the first liquid A and the second liquid B, respectively.

[0041] Next, the cap 30 is attached to the second container body 20 filled with the second liquid B prepared in step S202, thereby closing the second storage space S2 from above (step S203 in FIG. 10). The attachment of the cap 30 here is completed by undercut engagement between the outer peripheral surface of the fitting cylindrical portion 39 of the cap 30 and the inner peripheral surface of the engaging cylindrical wall 29 of the second container body 20. By attaching the cap 30 in this manner, the cap 30 covers and conceals the second storage space S2, thereby preventing the second liquid B from spilling out of the second storage space S2.

[0042] Next, the second container body 20 with the cap 30 prepared in step S203 is attached to the mouth 11 of the first container body 10 prepared in step S201 (step S204 in FIG. 10 ). More specifically, the peripheral wall 21a of the second container body 20 with the cap 30 is undercut-engaged with the mouth 11 of the first container body 10, and the intermittent ribs 21c are inserted between the anti-rotation ribs 11c. The cap 30 is then rotated around the central axis O to thread the female thread portion 31a of the outer peripheral wall 31 of the cap 30 into the male thread portion 11a of the mouth 11. At this time, the second inclined surface 37c of the second tooth portion 37a of the cap 30 can abut against and overcome the first inclined surface 29c of the second container body 20, so that the cap 30 can be attached to the first container body 10 by thread engagement while rotating relative to the second container body 20. Furthermore, since the lower part of the fitting cylindrical part 39 on the cap 30 side is undercut-engaged with the inner peripheral surface of the engaging cylindrical wall 29, when the cap 30 is opened as shown in Fig. 4, the inner wall part 25 of the second container body 20 moves away from the outer wall part 21 while still engaging with the cap 30. Through the above steps, the production of the two-liquid mixing container 100 based on the modified manufacturing method shown in Fig. 10 is completed.

[0043] As described above, the two-liquid mixing container 100 according to this embodiment includes the first container body 10 having the first storage space S1 for storing the first liquid A, the second container body 20 attached to the opening 11 of the first container body 10 and having the second storage space S2 for storing the second liquid B, and the cap 30 attached to the first container body 10 and closing the second storage space S2 from above. The second container body 20 includes an outer wall portion 21 attached to the opening 11 of the first container body 10 and a cap 30 attached to the outer wall portion 21 radially inward of the outer wall portion 21. The container has an inner wall portion 25 provided with a weakened portion 27a, and a bottom wall portion 27 connected to the lower portions of the outer wall portion 21 and the inner wall portion 25 and defining a second storage space S2. The bottom wall portion 27 is provided with a weakened portion 27a, and when the cap 30 is attached, the cap 30 engages with the upper portion of the inner wall portion 25 so as to be unable to rotate in at least one direction about the central axis O. Rotation of the cap 30 in at least one direction releases the cap 30. With this configuration, when the cap 30 is rotated and opened, the weakened portion 27a of the bottom wall portion 27 defining the second storage space S2 breaks, and the second liquid B automatically mixes with the first liquid A in the first storage space S1. Therefore, the contents can be used after the two liquids are mixed, making it easier to demonstrate the original efficacy of the contents.

[0044] Furthermore, in this embodiment, the cap 30 is attached to the first container body 10 by threaded engagement, and when the cap 30 is attached, the upper part of the inner wall portion 25 has a ratchet mechanism that rotates following the cap 30 when the cap 30 is rotated about the central axis O in a direction to release the threaded engagement of the cap 30, but does not follow the cap 30 when the cap 30 is rotated about the central axis O in a direction to tighten the threaded engagement of the cap 30. By employing such a configuration, the two liquids can be mixed by the most common opening means of the cap 30, which is to release the threaded engagement, and therefore the user can easily mix and use the two liquids.

[0045] In this embodiment, the outer peripheral surface of the inner wall portion 25 is provided with first teeth 29a that engage with the cap 30, and the inner peripheral surface of the engagement tube portion 37 that hangs down from the top wall 33 of the cap 30 is provided with second teeth 37a that engage with the inner wall portion 25, and the first teeth 29a are configured to have a first locking surface 29b that locks the second teeth 37a when the cap 30 rotates in a direction to release the threaded engagement, and a first inclined surface 29c that is inclined radially outward with respect to the circumferential direction and guides the second teeth 37a radially outward when the cap 30 rotates in a direction to tighten the threaded engagement. By adopting such a configuration, a ratchet mechanism can be provided with a configuration similar to that of a sealing wall provided in a normal cap 30, thereby simplifying the two-component mixing container 100 according to the present disclosure.

[0046] In this embodiment, the outer peripheral surface of the inner wall portion 25 is provided with first teeth 29a that engage with the cap 30, and the inner peripheral surface of the engagement tube portion 37 that hangs down from the top wall 33 of the cap 30 is provided with second teeth 37a that engage with the inner wall portion 25, and the second teeth 37a are configured to have a second locking surface 37b that locks the first teeth 29a when the cap 30 rotates in the direction to release the threaded engagement, and a second inclined surface 37c that is inclined radially inward with respect to the circumferential direction and guides the first teeth 29a radially inward when the cap 30 rotates in the direction to tighten the threaded engagement. By adopting such a configuration, a ratchet mechanism can be provided with a configuration similar to that of a sealing wall provided in a normal cap 30, and the two-component mixing container 100 according to the present disclosure can be simplified.

[0047] In this embodiment, the weakened portion 27a is configured to extend in the circumferential direction. By adopting such a configuration, the shear force generated by the rotation of the cap 30 is applied evenly to each part of the weakened portion 27a, so that the weakened portion 27a can be efficiently broken.

[0048] Furthermore, the manufacturing method of the two-liquid mixing container 100 according to this embodiment is a manufacturing method of the two-liquid mixing container 100 that includes a first container body 10 having a first storage space S1 for storing a first liquid A, a second container body 20 having a second storage space S2 for storing a second liquid B, and a cap 30 that closes the second storage space S2 from above, and includes the steps of: storing the first liquid A in the first storage space S1; attaching the second container body 20 to the opening 11 of the first container body 10; storing the second liquid B in the second storage space S2; and attaching the cap 30 to the first container body 10 to close the second storage space S2 from above. The second container body 20 has an outer wall portion 21 attached to the mouth portion 11 of the first container body 10, an inner wall portion 25 provided radially inward of the outer wall portion 21, and a bottom wall portion 27 connected to lower portions of the outer wall portion 21 and the inner wall portion 25 to define a second storage space S2, the bottom wall portion 27 having a weakened portion 27a, and when the cap 30 is attached, the cap 30 engages with an upper portion of the inner wall portion 25 so as to be unable to rotate in at least one direction about the central axis O, and the attachment of the cap 30 is released by rotating the cap 30 in at least one direction. With this configuration, when the cap 30 is rotated and opened, the weakened portion 27a of the bottom wall portion 27 that defines the second storage space S2 breaks, and the second liquid B automatically mixes with the first liquid A in the first storage space S1. Therefore, the contents can be used after the two liquids are mixed, making it easier for the contents to exert their original effects.

[0049] In particular, in the embodiment shown in Figures 7 to 9, it is possible to perform all of the processes of filling the first liquid A and the second liquid B, and attaching the second container body 20 and the cap 30, based on the first container body 10, thereby improving the manufacturing efficiency of the two-liquid mixing container 100.

[0050] Although the present disclosure has been described based on various drawings and examples, it should be noted that those skilled in the art can easily make various modifications and alterations based on the present disclosure. Therefore, it should be noted that these modifications and alterations are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to cause logical inconsistencies, and multiple components can be combined into one or divided. It should be understood that these modifications and alterations are also included in the scope of the present invention.

[0051] For example, in this embodiment, the cap 30 is configured to be attached to the first container body 10, but this is not limiting, and the cap 30 may be configured to be attached to the second container body 20.

[0052] Furthermore, in this embodiment, the cap 30 is configured to be released by rotating the cap 30 about the central axis O, thereby releasing the threaded engagement between the cap 30 and the first container body 10, but this is not limited to this embodiment. For example, the cap 30 may be configured to be pushed upward by rotating the cap 30 in at least one circumferential direction, thereby releasing the cap 30 from the stoppering engagement. In this case, it is sufficient that the cap 30 is configured to be unrotatable relative to the upper part of the inner wall portion 25 at least in the rotational direction in which the cap 30 is released. The cap 30 may also be configured to be unrotatable relative to the upper part of the inner wall portion 25 in both circumferential directions. Therefore, the engagement between the cap 30 and the upper part of the inner wall portion 25 is not limited to a ratchet mechanism, and other engagement means that restrain them at least in the circumferential direction may be used.

[0053] In addition, in this embodiment, the weakened portions 27a provided on the bottom wall portion 27 are configured to extend in the circumferential direction, but this is not limited to this. The weakened portions 27a may include those that extend in the radial direction, for example.

[0054] In this embodiment, the first tooth portions 29a and the second tooth portions 37a are configured to be provided at six locations in the circumferential direction, but this is not limited to this. The number of the first tooth portions 29a and the second tooth portions 37a can be determined arbitrarily. Furthermore, the numbers of the first tooth portions 29a and the second tooth portions 37a may be different as long as one is a multiple of the other. [Explanation of symbols]

[0055] 10 First container body 11 Mouth 11a Male thread 11b Engagement protrusion 11c Anti-rotation rib 11e Stop ring 13 Torso 15 Bottom 17 Shoulder 20 Second container body 21 Exterior wall 21a Peripheral wall 21b Standing wall 21c Intermittent Rib 21d Engagement protrusion 22 Connecting wall 23 Containment Outer Wall 25 Inner wall 25a Containment inner wall 27 Bottom wall 27a Weakened part 28 Central ceiling wall 29 Engagement cylinder wall 29a 1st tooth part 29b 1st locking surface 29c 1st slope 30 Cap 31 Outer wall 31a Female thread 33 Ceiling wall 35 Seal Wall 37 Engagement tube 37a 2nd tooth 37b Second locking surface 37c 2nd slope 39 Fitting cylinder 40 Mounting cap 41 Peripheral wall 41a Female thread 50 pump 60 nozzles 61 Nozzle hole 100 Two-liquid mixing container A 1st liquid B 2nd liquid O center axis S1 First Storage Space S2 Second storage space

Claims

1. a first container body having a first storage space for storing a first liquid; a second container body attached to the opening of the first container body and having a second storage space for storing a second liquid; a cap attached to the first container body or the second container body and closing the second storage space from above; Equipped with The second container body is an outer wall portion that engages with and is attached to the outer surface of the opening of the first container body; an inner wall portion provided radially inward of the outer wall portion; a bottom wall portion connected to lower portions of the outer wall portion and the inner wall portion and defining the second storage space; and The bottom wall portion is provided with a weakened portion, When the cap is attached, the cap is engaged with the upper part of the inner wall portion so as to be unable to rotate in at least one direction around the central axis, rotation of the cap in at least one direction releases the cap; The cap is attached to the first container body by threaded engagement, and when the cap is attached, the upper part of the inner wall portion has a ratchet mechanism that rotates in accordance with the cap when rotated around the central axis in a direction to release the threaded engagement of the cap, but does not follow the cap when rotated around the central axis in a direction to tighten the threaded engagement of the cap.

2. a first tooth portion that engages with the cap is provided on an outer peripheral surface of the inner wall portion; an engaging cylindrical portion that hangs down from the top wall of the cap has an inner circumferential surface provided with second teeth that engage with the inner wall portion; 2. The two-liquid mixing container according to claim 1, wherein the first tooth portion has a first locking surface that locks the second tooth portion when the cap is rotated in a direction to release the threaded engagement, and a first inclined surface that is inclined radially outward relative to the circumferential direction and guides the second tooth portion radially outward when the cap is rotated in a direction to tighten the threaded engagement.

3. a first tooth portion that engages with the cap is provided on an outer peripheral surface of the inner wall portion; an engaging cylindrical portion that hangs down from the top wall of the cap has an inner circumferential surface provided with second teeth that engage with the inner wall portion; 3. The two-liquid mixing container according to claim 1, wherein the second tooth portion has a second locking surface that locks the first tooth portion when the cap is rotated in a direction to release the threaded engagement, and a second inclined surface that is inclined radially inward with respect to the circumferential direction and guides the first tooth portion radially inward when the cap is rotated in a direction to tighten the threaded engagement.

4. The two-component mixing container according to claim 1 , wherein the weakened portion extends in a circumferential direction.

5. A method for manufacturing a two-liquid mixing container comprising a first container body having a first storage space for storing a first liquid, a second container body having a second storage space for storing a second liquid, and a cap for closing the second storage space from above, storing a first liquid in the first storage space; attaching the second container body to the opening of the first container body; storing a second liquid in the second storage space; a step of attaching the cap to the first container body or the second container body to close the second storage space from above; Including, The second container body is an outer wall portion that engages with and is attached to the outer surface of the opening of the first container body; an inner wall portion provided radially inward of the outer wall portion; a bottom wall portion connected to lower portions of the outer wall portion and the inner wall portion and defining the second storage space; and The bottom wall portion is provided with a weakened portion, When the cap is attached, the cap is engaged with the upper part of the inner wall portion so as to be unable to rotate in at least one direction around the central axis, rotation of the cap in at least one direction releases the cap; The cap is attached to the first container body by threaded engagement, and when the cap is attached, the upper part of the inner wall portion has a ratchet mechanism that rotates in accordance with the cap when rotated around the central axis in a direction to release the threaded engagement of the cap, but does not follow the cap when rotated around the central axis in a direction to tighten the threaded engagement of the cap.

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