Dispensing container

Abstract

The present invention provides a dispensing container that allows for easy processing of the molding die, offers high processing accuracy for the molding die, and reduces processing time. [Solution] The product is a molded synthetic resin product consisting of a cap 1, an outer cylinder 2, an inner cylinder 3, and a receiving cylinder 4. The cap is a cylindrical body having a top surface 11, and its lower end is detachably attached to the upper end of the outer cylinder. The outer cylinder is a cylindrical body having a bottom surface 21, and a support cylinder 25 is erected in the center of the bottom surface, with an internal thread portion 24 provided along the entire inner circumference wall. The inner cylinder is rotatable at the lower part and is inserted into the upper part of the outer cylinder. The receiving cylinder has a receiving tray 41 at the top and a support column 43 suspended at the bottom. The receiving tray supports the lower part of the viscous coating substance M filled in the inner cylinder and moves up and down along the inner circumference wall of the inner cylinder. The support column has an external thread portion 45 on a part of the lower part of the outer circumference wall, and the external thread portion is screwed into the internal thread portion of the support cylinder of the outer cylinder, and the receiving cylinder is moved up and down by rotating the outer cylinder.

Description

Technical Field

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[0001] The present invention relates to a feeding container configured to feed viscous coating substances such as lip cream, lipstick, glue, etc.

Background Art

[0002] Conventionally, as a feeding container of this type, for example, as shown in FIGS. 9 to 11, there is one that is a synthetic resin molded product and is composed of a cap 51, an outer cylinder 52, an inner cylinder 53, and a receiving cylinder 54 (Patent Document 1).

[0003] The cap 51 is a cylindrical body having a top surface 55, and the lower end is detachably attached to the upper end of the outer cylinder 52.

[0004] The outer cylinder 52 is a cylindrical body having a bottom surface 56, and a vertically long support column 58 provided with an external thread portion 57 on the outer peripheral wall is erected at the center of the bottom surface 56.

[0005] The inner cylinder 53 is rotatable at the lower part and is inserted into the upper part of the outer cylinder 52.

[0006] The receiving cylinder 54 has a tray 59 at the upper part and a threaded cylinder 60 at the lower part. The tray 59 supports the lower part of the viscous coating substance M filled in the inner cylinder 53 and moves up and down along the inner peripheral wall of the inner cylinder 53. The threaded cylinder 60 is provided with an internal thread portion 61 on the inner peripheral wall;

[0007] Then, the external thread portion 57 provided on the outer peripheral wall of the support column 58 of the outer cylinder 52 is screwed into the internal thread portion 61 provided on the inner peripheral wall of the threaded cylinder 60 of the receiving cylinder 54, and by rotating the outer cylinder 52, the receiving cylinder 54 is moved up and down.

[0008] Such a conventional feeding container is composed of four members: a cap 51, an outer cylinder 52, an inner cylinder 53, and a receiving cylinder 54. Therefore, compared with a feeding container composed of five conventional members, the cost of creating a molding die is reduced, and the manufacturing cost is lowered. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Patent Application No. 2024-104870 (Not published) [Overview of the project] [Problems that the invention aims to solve]

[0010] However, in the dispensing container described in Patent Document 1, an external threaded portion 57 is provided over the entire outer circumferential wall of the support column 58 of the outer cylinder 52, and an internal threaded portion 61 is provided over the entire inner circumferential wall of the threaded cylinder 60 of the receiving cylinder 54.

[0011] Therefore, the molding die that forms the external thread portion 57, which is provided over the entire outer peripheral wall of the support column 58 of the outer cylinder 52, needs to have an internal thread portion, and the molding die that forms the internal thread portion 61, which is provided over the entire inner peripheral wall of the threaded cylinder 60 of the receiving cylinder 54, needs to have an external thread portion.

[0012] As shown in Figure 12(a), the molding die for forming the internal thread portion 61 of the receiving cylinder 54 consists mainly of a rod-shaped male mold 63 with an external thread portion 62 formed on its outer peripheral wall and a female mold 65 with a cylindrical cavity 64 formed on its inner peripheral wall. To form the external thread portion 62 on the male mold 63, as shown in Figure 12(b), a cutting tool C is pressed directly against the outer peripheral wall of the male mold 63, both ends of the male mold 63 are fixed, and the male mold 63 is rotated.

[0013] Therefore, in order to form the external thread portion 62 on the male mold 63, the cutting tool C can be directly pressed against the outer circumferential wall of the male mold 63, and both ends of the male mold 63 can also be easily fixed. As a result, axial runout of the rotating shaft is less likely to occur, machining accuracy is good, and machining time is short, so there are no problems.

[0014] As shown in Figure 13(a), the molding die for forming the external thread portion 57 of the outer cylinder 52 mainly consists of a male mold 69 with an internal thread portion 68 formed on the inner circumferential wall of a cylindrical cavity 67, and a female mold 71 with a cylindrical cavity 70 formed on its inner circumferential wall. To form the internal thread portion 68 in the male mold 69, as shown in Figure 13(b), an elongated support 72 with a cutting tool C attached to its tip is inserted into the cylindrical cavity 67, the cutting tool C is pressed against the inner circumferential wall of the cavity 67, the male mold 69 is fixed, and the male mold 69 is rotated.

[0015] However, forming the internal thread portion 68 on the male mold 69 presents several problems: the support 72 to which the cutting tool 66 is attached is elongated and therefore prone to bending; inserting the support 72 into the cylindrical cavity 68 is difficult because the cavity 68 is narrow; and the male mold 69 can only be fixed at one end, making it easy for the rotation axis to wobble. These problems result in poor machining accuracy and longer machining times.

[0016] Therefore, the present invention aims to solve these conventional problems by providing an internal threaded portion along the entire inner circumferential wall of the outer cylinder's support cylinder, and an external threaded portion only on a portion of the lower part of the outer circumferential wall of the receiving cylinder's support column, thereby enabling easy processing of the molding die, improving the processing accuracy of the molding die, and shortening the processing time. [Means for solving the problem]

[0017] Therefore, the dispensing container of the present invention is a synthetic resin molded product composed of a cap 1, an outer cylinder 2, an inner cylinder 3, and a receiving cylinder 4. The cap 1 is a cylindrical body having a top surface 11, and its lower end is detachably attached to the upper end of the outer cylinder 2. The outer cylinder 2 is a cylindrical body having a bottom surface 21, and a vertically elongated support cylinder 25 is erected in the center of the bottom surface 21, with an internal thread portion 24 provided along the entire inner circumference wall. The inner cylinder 3 is rotatable at its lower part and is inserted into the upper part of the outer cylinder 2. The receiving cylinder 4 has a receiving tray 41 at its upper part and a support column 43 suspended at its lower part. The receiving tray 41 supports the lower part of the viscous coating substance M filled in the inner cylinder 3 and moves up and down along the inner circumference wall of the inner cylinder 3. The support column 43 has an external thread portion 45 provided on a part of the lower part of its outer circumference wall. The external threaded portion 45 of the support column 43 is screwed into the internal threaded portion 24 of the support cylinder 25 of the outer cylinder 2, and the receiving cylinder 4 is moved up and down by rotating the outer cylinder 2.

[0018] In the dispensing container of the present invention, a circumferential groove 23 is provided on the inner circumferential wall of the upper part of the outer cylinder 2, and an engaging rib 32 is provided on the outer circumferential wall of the lower part of the inner cylinder 3, and this engaging rib 32 is loosely fitted into the circumferential groove 23 of the outer cylinder 2.

[0019] In the dispensing container of the present invention, the inner cylinder 3 is provided with a horizontal partition wall 33 in its lower inner circumferential wall, which has an insertion hole 34 formed therein with parallel opposing surfaces 34a, 34a. The support column 43 of the receiving cylinder 4 has a horizontal cross-sectional shape of its outer circumferential wall that has parallel opposing surfaces 43a, 43a that slide against the parallel opposing surfaces 34a, 34a of the insertion hole 34 of the horizontal partition wall 33 of the inner cylinder 3, and is shaped to be insertable into this insertion hole 34. [Effects of the Invention]

[0020] The dispensing container of the present invention features an internal threaded portion 24 provided across the entire inner circumferential wall of the support cylinder 25 of the outer cylinder 2, and an external threaded portion 45 provided on a part of the lower part of the outer circumferential wall of the support column 43 of the receiving cylinder 4. The molding die for these portions can be easily manufactured, has good manufacturing accuracy, and requires little manufacturing time.

[0021] Furthermore, the feeding container of the present invention is provided with a horizontal partition wall 33 in the inner cylinder 3, in which an insertion hole 34 having parallel opposing surfaces 34a, 34a is formed, and a support column 43 having parallel opposing surfaces 43a, 43a that are in sliding contact with the parallel opposing surfaces 34a, 34a is vertically provided on the receiving cylinder 4. As a result, the receiving cylinder 4 moves up and down without rotating, so that even if the viscosity of the viscous coating material M is low, the feeding function is not impaired.

Brief Description of the Drawings

[0022] [Figure 1] It is an external perspective view showing an embodiment of the feeding container of the present invention. [Figure 2] It is an exploded perspective view of the feeding container of the present invention shown in FIG. 1 (excluding the viscous coating material). [Figure 3] It is an exploded cross-sectional view of the feeding container of the present invention shown in FIG. 1 (excluding the viscous coating material). [Figure 4] It is a longitudinal cross-sectional view of the feeding container of the present invention shown in FIG. 1. [Figure 5] It is a longitudinal cross-sectional view showing a state in which the viscous coating material is fed out from the feeding container of the present invention. [Figure 6] It is a horizontal cross-sectional view taken along line A-A in FIG. 5. [Figure 7] (a) is a schematic longitudinal cross-sectional view of the molding die for the outer cylinder of the feeding container of the present invention, and (b) is a schematic explanatory view showing the manufacturing method of the molding die. [Figure 8] (a) is a schematic longitudinal cross-sectional view of the molding die for the receiving cylinder of the feeding container of the present invention, and (b) is a schematic cross-sectional view of the molding die. [Figure 9] It is an exploded perspective view of a conventional feeding container (excluding the viscous coating material). [Figure 10] It is an exploded cross-sectional view of a conventional feeding container (excluding the viscous coating material). [Figure 11] It is a longitudinal cross-sectional view of a conventional feeding container. [Figure 12] (a) is a schematic longitudinal cross-sectional view of the molding die for the receiving cylinder of a conventional feeding container, and (b) is a schematic explanatory view showing the manufacturing method of the molding die. [Figure 13](a) is a schematic longitudinal cross-sectional view of a conventional molding die for the outer cylinder of a dispensing container, and (b) is a schematic explanatory diagram showing the manufacturing method of that molding die. [Modes for carrying out the invention]

[0023] Hereinafter, embodiments for implementing the dispensing container of the present invention will be described in detail with reference to the drawings.

[0024] The dispensing container of the present invention is made of a synthetic resin molded product and consists of a cap 1, an outer cylinder 2, an inner cylinder 3, and a receiving cylinder 4, as shown in Figures 1 to 4.

[0025] As shown in the figure, the cap 1 is a cylindrical body having a top surface 11, and its lower end is detachably attached to the upper end of the outer cylinder 2.

[0026] As shown in the figure, the outer cylinder 2 is a cylindrical body having a bottom surface 21, and its outer diameter is the same as the outer diameter of the cap 1. A stepped cylinder 22 with a smaller diameter is provided at the top of the outer cylinder 2, and a circumferential groove 23 is provided on the inner circumferential wall of the stepped cylinder 22. By inserting the lower end of the cap 1 into the stepped cylinder 22 of the outer cylinder 2, the boundary between the cap 1 and the outer cylinder 2 becomes flush. In addition, a vertically elongated support cylinder 25 is erected in the center of the bottom surface 21 of the outer cylinder 2, with an internal threaded portion 24 provided along the entire inner circumferential wall.

[0027] The molding die that forms the internal thread portion 24 provided over the entire inner circumferential wall of the support cylinder 25 of the outer cylinder 2, as shown in Figure 7(a), mainly consists of a rod-shaped male mold 13 with an external thread portion 12 formed on its outer circumferential wall, a first female mold 15 with a cylindrical first cavity 14 formed on its inner circumferential wall, and a second female mold 17 with a cylindrical second cavity 16 formed on its inner circumferential wall. To form the external thread portion 12 on the male mold 13, as shown in Figure 7(b), a cutting tool C is pressed directly against the outer circumferential wall of the male mold 13, both ends of the male mold 13 are fixed, and the male mold 13 is rotated.

[0028] Therefore, in order to form the external thread portion 12 on the male mold 13, the cutting tool C can be directly pressed against the outer circumferential wall of the male mold 13, and both ends of the male mold 13 can also be easily fixed, which reduces the likelihood of axial runout of the rotating shaft and improves machining accuracy.

[0029] As shown in the figure, the inner cylinder 3 is a cylindrical body with a smaller diameter than the outer cylinder 2. A stepped cylinder 31 with an even smaller diameter is provided at the bottom of the inner cylinder 3, and an engaging rib 32 is provided on the outer peripheral wall of the upper part of the stepped cylinder 31. A horizontal partition wall 33 is provided on the inner peripheral wall below the engaging rib 32. As shown in Figure 6, an insertion hole 34 is formed in the horizontal partition wall 33, which has a horizontal cross-sectional shape with parallel opposing surfaces 34a, 34a such as a drum shape or an oval shape. The lower part of the inner cylinder 3 is made rotatable by loosely fitting the engaging rib 32 of the inner cylinder 3 into the circumferential groove 23 of the outer cylinder 2, and is inserted into the upper part of the outer cylinder 2.

[0030] As shown in the figure, the receiving cylinder 4 has a receiving tray 41 at its upper end, the outer diameter of which is the same as the inner diameter of the inner cylinder 3, and a support column 43 with a smaller diameter than the receiving tray 41 is suspended at its lower end via a stepped portion 42. The receiving tray 41 has multiple vertical ribs 44 arranged radially on its inner circumferential wall, which firmly support the lower part of the viscous coating material M filled in the inner cylinder 3 by pressing it into these vertical ribs 44, allowing the viscous coating material M to move up and down along the inner circumferential wall of the inner cylinder 3. As shown in Figure 6, the support column 43 has a horizontal cross-sectional shape of its outer circumferential wall that has parallel opposing surfaces 43a, 43a that slide against the parallel opposing surfaces 34a, 34a of the insertion hole 34 of the horizontal partition wall 33 of the inner cylinder 3, and is shaped to be insertable into this insertion hole 34, with an external thread portion 45 provided on a part of the lower part of the outer circumferential wall. The external threaded portion 45 is provided along the entire inner circumferential wall of the support cylinder 25 of the outer cylinder 2 and is screwed into the internal threaded portion 24, so that the receiving cylinder 4 is raised and lowered by rotating the outer cylinder 2 in forward and reverse directions. As a result, the viscous coating substance M filled in the receiving tray 41 of the receiving cylinder 4 moves up and down along the inner circumferential wall of the inner cylinder 3.

[0031] The molding die that forms the external thread portion 45 provided on a part of the lower part of the outer peripheral wall of the support column 43 that is suspended from the lower part of the receiving cylinder 4 is as shown in Figures 8(a) and (b), and consists of a first split mold 49 which forms half of the internal thread portion 48 on the lower part of a substantially semi-cylindrical cavity 47a which mainly has parallel opposing surfaces 46a on its inner peripheral wall, and a second split mold 50 which forms the other half of the internal thread portion 48 on a part of the lower part of a substantially semi-cylindrical cavity 47b which also has parallel opposing surfaces 46a on its inner peripheral wall, and the internal thread portion 48 is formed with the first split mold 46 and the second split mold 48 in an open state.

[0032] Therefore, in order to form the internal thread portion 47 in the first split mold 46 and the second split mold 48, a cutting tool can be pressed against a part of the lower part of each of the first split mold 46 and the second split mold 48, which are in an open state, and the cutting tool can be rotated. Since both ends of these split molds can also be easily fixed, the processing accuracy is good and the processing time is shortened.

[0033] Furthermore, the dispensing container of the present invention is assembled according to the following procedure.

[0034] First, the receiving cylinder 4 is inserted from above the inner cylinder 3 so that the parallel opposing surfaces 34a, 34a of the insertion holes 34 of the horizontal bulkhead 33 of the inner cylinder 3 and the parallel opposing surfaces 43a, 43a of the support column 43 of the receiving cylinder 4 slide against each other. The external thread portion 45, which is provided on a part of the lower part of the outer peripheral wall of the support column 43 of the receiving cylinder 4, is screwed into the internal thread portion 24, which is provided over the entire inner peripheral wall of the support cylinder 25 of the outer cylinder 2. The receiving cylinder 4 is then lowered until the lower end of the support column 43 is close to or touches the bottom surface 21 of the inner peripheral wall of the support cylinder 25 of the outer cylinder 2.

[0035] Next, the viscous coating substance M is filled into the inner cylinder 3 from above, up to the upper end of the inner cylinder 3, thereby supporting the viscous coating substance M in the receiving tray 41 of the receiving cylinder 4.

[0036] Then, the cap 1 is inserted from above the inner cylinder 3, and the lower end of the cap 1 is inserted into the stepped cylinder 22 of the outer cylinder 2, so that the boundary between the cap 1 and the outer cylinder 2 is flush, and the cap 1 is attached to the outer cylinder 2.

[0037] The dispensing container of the present invention, as described above, is used as follows.

[0038] First, hold the outer cylinder 2 of the dispensing container of the present invention in the state shown in Figures 1 and 4, and pinch the cap 1 with your fingers to remove the cap 1 from the outer cylinder 2.

[0039] Next, by pinching the inner cylinder 3 with the fingers of one hand and the outer cylinder 2 with the fingers of the other hand, and rotating the outer cylinder 2 in the forward direction, the external thread portion 45 provided on a part of the lower part of the outer peripheral wall of the support column 43 of the receiving cylinder 4 rises along the internal thread portion 24 provided on the inner peripheral wall of the support cylinder 25 of the outer cylinder 2. As a result, the receiving tray 41 of the receiving cylinder 4 also rises, and as shown in Figure 5, the upper end of the viscous coating material M is exposed above the inner cylinder 3, and it can be used in this state.

[0040] After use, when the outer cylinder 2 is rotated in the reverse direction, the external thread portion 45 provided on a part of the lower part of the outer peripheral wall of the support column 43 of the receiving cylinder 4 descends along the internal thread portion 24 provided on the inner peripheral wall of the support cylinder 25 of the outer cylinder 2. As a result, the receiving tray 19 of the receiving cylinder 4 also descends, and the upper end of the viscous coating substance M that was exposed at the upper end of the inner cylinder 3 enters the inner cylinder 3.

[0041] Furthermore, even when the outer cylinder 2 is rotated in forward and reverse directions, the parallel opposing surfaces 34a, 34a of the insertion holes 34 of the horizontal partition wall 33 of the inner cylinder 3 and the parallel opposing surfaces 43a, 43a of the support column 44 of the receiving cylinder 4 are in sliding contact. As a result, the receiving cylinder 4 moves up and down while its rotation is prevented, and even if the viscous coating material M supported by the receiving tray 41 of the receiving cylinder 4 has low viscosity, the viscous coating material M will not detach from the receiving tray 41, and the dispensing function will not be impaired.

[0042] Then, if the cap 1 that was removed from the outer cylinder 2 is reattached to the outer cylinder 2, as shown in Figures 1 and 4. The material returns to its original state as shown, allowing the viscous coating material M to be stored in a condition that is less prone to drying or contamination.

[0043] The dispensing container of the present invention is configured as described above, and the molding die that forms the internal thread portion 24 provided over the entire inner circumferential wall of the support cylinder 25 of the outer cylinder 2, and the external thread portion 45 provided on a part of the lower part of the outer circumferential wall of the support column 43 of the receiving cylinder 4, can be easily manufactured, has good manufacturing accuracy, and requires little manufacturing time.

[0044] Furthermore, as mentioned earlier, in the dispensing container of the present invention, since the receiving cylinder 4 moves up and down without rotating, the dispensing function will not be impaired even if the viscosity of the viscous coating material M is low. [Explanation of Symbols]

[0045] 1 cap 2 Outer cylinder 3 Inner cylinder 4 Receiver 11 Top surface 21 Bottom 23 Circumferential groove 24 Internal thread section 25 Support tube 32 Engaging Ribs 33 Horizontal bulkhead 34 Insertion holes 34a Parallel opposing surfaces 41 Saucer 43 Post 43a Parallel opposing surfaces 45 External thread section M Viscous coating substance

Claims

1. It is a molded product made of synthetic resin, consisting of a cap, an outer cylinder, an inner cylinder, and a receiving cylinder. The aforementioned cap is a cylindrical body having a top surface, and its lower end is detachably attached to the upper end of the outer cylinder. The outer cylinder is a cylindrical body having a bottom surface, and a vertically elongated support cylinder is erected in the center of the bottom surface, with an internal threaded portion extending across the entire inner circumference. The inner cylinder is rotatable at its lower end and is inserted into the upper part of the outer cylinder. The aforementioned receiving cylinder has a receiving tray at the top and a support column suspended at the bottom. The receiving tray supports the lower part of the viscous coating material filled in the inner cylinder and moves up and down along the inner circumferential wall of the inner cylinder. The aforementioned support column has an external threaded portion provided on a part of the lower part of the outer wall, A dispensing container characterized in that the external threaded portion of the support column is screwed into the internal threaded portion of the support cylinder of the outer cylinder, and the receiving cylinder is raised and lowered by rotating the outer cylinder.

2. The dispensing container according to claim 1, characterized in that a circumferential groove is provided on the inner circumferential wall of the upper part of the outer cylinder, and an engaging rib is provided on the outer circumferential wall of the lower part of the inner cylinder, and the engaging rib is loosely fitted into the circumferential groove of the outer cylinder.

3. The dispensing container according to claim 1 or 2, characterized in that the inner cylinder is provided with a horizontal partition wall in the lower inner circumferential wall having an insertion hole formed therein with parallel opposing surfaces, and the support column of the receiving cylinder has a horizontal cross-sectional shape of the outer circumferential wall having parallel opposing surfaces that slide in contact with the parallel opposing surfaces of the insertion hole in the horizontal partition wall of the inner cylinder, and is shaped to be insertable into this insertion hole.

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