Container with cap
The cap design with an elastically deformable recess addresses wear issues on overhanging projections, ensuring consistent torque and seal integrity without through-holes.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- YOSHINO KOGYOSHO CO LTD
- Filing Date
- 2024-11-29
- Publication Date
- 2026-06-10
AI Technical Summary
The wear on overhanging projections of container caps, particularly those with a double-tube shape, leads to decreased click feeling and torque during opening and closing, and there is a risk of substance ingress through through-holes formed by wear.
A cap design with an elastically deformable recess on the inner circumferential surface of the container mouth, which suppresses wear on overhanging projections by allowing radial deformation, preventing frictional wear and ensuring a seal without through-holes.
The design effectively prevents wear on overhanging projections, maintaining seal integrity and torque consistency, while avoiding substance ingress.
Smart Images
Figure 2026094725000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a container with a cap.
Background Art
[0002] As a container with a cap including a container body for containing contents and a cap detachably attached to the mouth of the container body, conventionally, as shown in Patent Document 1 below, for example, the cap includes an inner cylinder detachably attached to the mouth and an outer cylinder surrounding the inner cylinder from the outside in the radial direction. On the outer peripheral surface of the mouth and the inner peripheral surface of the inner cylinder, first engaging portions and second engaging portions are respectively formed that engage and disengage with each other as the cap and the mouth rotate relative to each other around the container axis, so that the cap is attached to and detached from the mouth. A locking projection is provided on a portion of the inner cylinder located below the second engaging portion, and on a portion of the outer peripheral surface of the mouth located below the first engaging portion, an overhanging projection that can be overcome by the locking projection around the container axis and a regulating projection that is located on the tightening side along the container axis from the overhanging projection and regulates the locking projection from overcoming to the tightening side are formed.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] However, every time the contents are used and the cap is attached to and detached from the mouth, the locking projection of the cap slides on the overhanging projection of the container body, and there is a possibility that the overhanging projection will wear. In this case, there is a possibility that the click feeling and the torque during the opening and closing operation of the cap will decrease. In particular, when the cap is formed in a double-tube shape with an inner and outer cylinder, in order to ensure rigidity, the cap is generally made of a resin material that is as hard as or harder than the material that forms the container body, which makes it prone to wear on the protrusions that cross over the container body. As a means to solve such problems, for example, if the overhanging projection is formed in a cantilevered shape with one end in the circumferential direction being fixed and the other end in the circumferential direction being free, there is a risk that water or other substances may enter the container body through the through-holes that demarcate the overhanging projection.
[0005] The present invention provides a container with a cap that can suppress wear on the overhanging protrusions of the container body. [Means for solving the problem]
[0006] A capped container according to one aspect of the present invention comprises a container body for containing contents and a cap detachably attached to the mouth of the container body, wherein the cap comprises an inner cylinder detachably attached to the mouth and an outer cylinder surrounding the inner cylinder from the radially outer side, and a first engaging portion and a second engaging portion are separately formed on the outer circumferential surface of the mouth and the inner circumferential surface of the inner cylinder, respectively, which engage and separate from each other as the mouth and the cap rotate relative to each other around the container axis, thereby allowing the cap to be attached to and detached from the mouth, and the inner cylinder A locking projection is provided in the portion located below the second engagement portion, and on the outer circumferential surface of the opening, a crossover projection is formed in the portion located below the first engagement portion, which the locking projection can cross over around the container axis, and a restricting projection is formed on the tightening side along the container axis from the crossover projection, which restricts the locking projection from crossing over to the tightening side, and a recess is formed on the inner circumferential surface of the first portion including the crossover projection when viewed from the radial direction, and the first portion is formed to be elastically deformable in the radial direction.
[0007] In the mouth portion, a recess is formed on the inner circumferential surface of the first portion including the overhang projection when viewed from the radial direction, and the first portion is formed to be elastically deformable in the radial direction. Therefore, when the locking projection overcomes the overhang projection around the container axis, the first portion of the mouth portion can be elastically deformed radially inward, thereby suppressing the frictional force generated between the locking projection and the overhang projection and preventing wear on the overhang projection. The recess formed on the inner circumferential surface of the opening allows the first portion of the opening to be elastically deformable in the radial direction. This makes it possible to suppress wear on the overhanging projection without forming a through hole in the opening, and to ensure a good seal between the cap and the opening.
[0008] The outer cylinder and the body of the container have a square shape with multiple corners when viewed from above and below, the positions of the corners on the outer cylinder and the body coincide around the container axis, and the locking projection, the overhang projection, the regulating projection, and the recess may be provided in the portion of the circumferential direction along the container axis where the corners are located.
[0009] In the circumferential direction along the container axis, locking protrusions, overhanging protrusions, restricting protrusions, and recesses are provided in the parts where the corners of the outer cylinder and the body of the container are located, and where it is easy to secure space between the inner surface of the outer cylinder and the outer surface of the inner cylinder. Therefore, these locking protrusions and the like can be easily provided. [Effects of the Invention]
[0010] According to the above embodiment of the present invention, wear on the overhanging protrusions of the container body can be suppressed. [Brief explanation of the drawing]
[0011] [Figure 1] This is a top view of a container with a cap, according to one embodiment. [Figure 2] This is a cross-sectional view taken along the line II-II in Figure 1. [Figure 3] This is an enlarged view of part III in Figure 2. [Figure 4]This is a cross-sectional view taken along the line IV-IV in Figure 3. [Figure 5] This is a front view of the overhanging projection and restricting projection of the opening, viewed from the radially outer side. [Modes for carrying out the invention]
[0012] An embodiment of the present invention will be described below with reference to the drawings. As shown in Figures 1 and 2, the capped container 1 of this embodiment comprises a container body 11 in which contents are contained, and a cap 13 that is detachably attached to the mouth 12 of the container body 11.
[0013] The cap 13 is formed in a top-cylindrical shape. The container body 11 is a double-walled container comprising an inner container 14 in which the contents are contained, and an outer container 15 in which the inner container 14 is housed. Alternatively, the container body 11 may have only an outer container 15, without the inner container 14, with the contents contained within the outer container 15.
[0014] The inner container 14, outer container 15, and cap 13 are arranged coaxially with a common axis. Hereinafter, this common axis will be referred to as the container axis O, the side of the cap 13 along the container axis O will be referred to as the upper side, the side of the bottom 11a of the container body 11 along the container axis O will be referred to as the lower side, and the direction along the container axis O will be referred to as the vertical direction. The direction that intersects the container axis O when viewed from the vertical direction will be referred to as the radial direction, and the direction that circles around the container axis O when viewed from the vertical direction will be referred to as the circumferential direction.
[0015] The outer container 15 comprises a main body cylinder 16 formed in the shape of a bottomed cylindrical body, and a mouth member 17 fixed to the upper end of the main body cylinder 16.
[0016] The body of the main cylinder 16 (the body of the container body 11) has a square shape with multiple corners when viewed from above or below. The mouthpiece 17 includes a mouth portion 12 to which the cap 13 is detachably attached, an outer fixing cylinder 18 that is fitted and fixed inside the upper end portion of the main body cylinder 16, and an inner fixing cylinder 19 that is surrounded from the outer side in the radial direction by the outer fixing cylinder 18 and fixes the inner container 14.
[0017] The mouth portion 12 is located above the main body cylinder 16. The mouth portion 12 is formed in a cylindrical shape extending in the vertical direction. The lower part of the mouth portion 12 is formed in a double-cylindrical shape having an inner cylinder portion 12a and an outer cylinder portion 12b. The inner fixing cylinder 19 extends downward from the lower end portion of the inner cylinder portion 12a, and the upper end portion of the outer fixing cylinder 18 is connected to the lower end portion of the outer cylinder portion 12b. Here, the outer fixing cylinder 18 is formed in a capped cylindrical shape having an annular top wall, and the outer cylinder portion 12b extends upward from the inner peripheral edge portion of the top wall. The upper part of the mouth portion 12 extends upward from the upper end portion of the inner cylinder portion 12a. The outer diameter of the upper part of the mouth portion 12 is smaller than the outer diameter of the outer cylinder portion 12b. A first engaging portion 21, which will be described later, is formed on the outer peripheral surface of the upper part of the mouth portion 12.
[0018] The cap 13 includes a top wall 24, an inner cylinder 22 detachably attached to the mouth portion 12, and an outer cylinder 23 surrounding the inner cylinder 22 from the outer side in the radial direction. The inner cylinder 22 and the outer cylinder 23 extend downward from the lower surface of the top wall 24.
[0019] The outer cylinder 23 has a rectangular shape with a plurality of corners when viewed from the vertical direction. As shown in FIG. 1, the positions of the corners of the outer cylinder 23 and the body portion of the main body cylinder 16 around the container axis O coincide with each other. The sizes of the outer cylinder 23 and the body portion of the main body cylinder 16 when viewed from the vertical direction are the same as each other. The outer cylinder 23 and the body of the main cylinder 16 have a square shape when viewed from above, and the sides and corners that make up the square shape have a curved shape that protrudes radially outward when viewed from above. The sides may, for example, be straight when viewed from above, and the corners may, for example, be pointed radially outward when viewed from above. In addition, the body of the outer cylinder 23 and the main cylinder 16 may have a circular shape, an oval shape, an ellipse shape, etc. when viewed from above.
[0020] A second engaging portion 25 is formed on the inner circumferential surface of the inner cylinder 22, which engages with the first engaging portion 21 of the mouth portion 12. The first engaging portion 21 and the second engaging portion 25 engage and separate from each other as the mouth portion 12 and the cap 13 rotate relative to each other around the container axis O, thereby attaching and detaching the cap 13 to the mouth portion 12. In the illustrated example, the first engaging portion 21 is a male thread, and the second engaging portion 25 is a female thread.
[0021] A locking projection 26 is provided on the portion of the inner cylinder 22 located below the second engagement portion 25. In the illustrated example, the locking projection 26 protrudes downward from the inner cylinder 22, but it may also protrude radially inward from the inner cylinder 22. The locking projection 26 is provided at the same position as the corners of the outer cylinder 23 in the circumferential direction. Here, a vertically extending rib 22a is formed on the outer circumferential surface of the inner cylinder 22, in the portion located at the same circumferential position as the corner of the outer cylinder 23. The rib 22a is provided over the entire vertical area of the outer circumferential surface of the inner cylinder 22. The upper end of the rib 22a is connected to the top wall 24. The locking projection 26 extends downward from the lower end surface of the rib 22a and from the radially outer portion of the lower end opening edge of the inner cylinder 22. The locking projection 26 may extend downward only from the lower end surface of the rib 22a, or only from the lower end opening edge of the inner cylinder 22. Furthermore, the rib 22a may be omitted.
[0022] As shown in Figure 4, the loosening side X end 26a of the locking projection 26, along the container axis O at the radial inner end, extends toward the tightening side Y along the container axis O as it moves radially inward. The end face 26b of the locking projection 26 on the tightening side Y is a flat surface facing the tightening side Y throughout its entire length.
[0023] Here, as shown in Figures 3 and 4, a crossing projection 27 and a restricting projection 28 are formed on the outer circumferential surface of the mouth portion 12, specifically in the portion located below the first engaging portion 21. In the illustrated example, the overhang projection 27 and the restricting projection 28 are formed on the outer circumferential surface of the outer cylindrical portion 12b of the opening 12. The radial outer end of the overhang projection 27 is located radially inward from the radial outer end of the restricting projection 28.
[0024] The overcoming projection 27 is formed so that the locking projection 26 of the cap 13 can overcome it around the container axis O. The outer circumferential surface of the overhang projection 27 exhibits a curved projection that extends radially outward when viewed from above. The outermost radially outer end of the overhang projection 27 is located on the tightening side Y of the circumferential center of the overhang projection 27. The loosening side X end 26a of the radially inner end of the locking projection 26 is in contact with or close to the tightening side Y end of the outer circumferential surface of the overhang projection 27.
[0025] The restricting projection 28 is located on the tightening side Y relative to the overcoming projection 27. The restricting projection 28 prevents the locking projection 26 from overcoming the tightening side Y. The restricting projection 28, when viewed from above, has a right-angled triangular shape and is defined by adjacent side portion 28a, opposite side portion 28b, and hypotenuse portion 28c.
[0026] The adjacent side portion 28a is located on the outer circumferential surface of the outer cylinder portion 12b. When viewed from above, the opposite side portion 28b protrudes radially outward from the end of the loosening side X of the adjacent side portion 28a and faces the loosening side X. The end face 26b of the tightening side Y of the locking projection 26 is in contact with or close to the opposite side portion 28b. The hypotenuse portion 28c extends radially inward from the radially outer end of the opposite side portion 28b toward the tightening side Y, and connects to the end of the tightening side Y in the adjacent side portion 28a. When viewed from above, the hypotenuse portion 28c has a curved shape that protrudes radially outward.
[0027] In the outer cylindrical portion 12b of the mouth portion 12, a recess 31 is formed on the inner circumferential surface of the first portion 29, which includes the overhang projection 27 when viewed from the radial direction, and the first portion 29 is formed to be elastically deformable in the radial direction. As a result, the overhang projection 27 is provided to be elastically displaceable in the radial direction. The first portion 29 elastically deforms when the locking projection 26 of the cap 13 overhangs the overhang projection 27 around the container axis O. Of the outer cylinder portion 12b, the portion formed by the recess 31 and made thinner than the rest is the first portion 29. As shown in Figure 5, the first portion 29 includes the overhang projection 27 throughout its entire length when viewed from the radial direction. The tightening side Y end of the first portion 29 is located at the same circumferential position as the radial outer end of the regulating projection 28, or at the loosening side X.
[0028] The recess 31 is larger than the overhang projection 27 when viewed from the radially outside and is provided so as to surround the outer peripheral edge of the overhang projection 27. When viewed from the radially outside, the recess 31 surrounds the outer peripheral edge of the overhang projection 27 at a distance of, for example, 0.8 mm to 1.0 mm. The thickness of the first portion 29 is, for example, 0.3 mm, which is, for example, 50% or less of the thickness of the portion of the outer cylinder 12b other than the first portion 29. The recess 31 reaches the lower end edge of the inner circumferential surface of the outer cylinder 12b and opens downward. The recess 31 is provided along the entire length in the vertical direction on the inner circumferential surface of the outer cylinder 12b. The overcoming projection 27, the restricting projection 28, and the recess 31 are provided in the same position as the corners of the body of the main cylinder 16 in the circumferential direction.
[0029] As described above, in the capped container 1 of this embodiment, a recess 31 is formed on the inner circumferential surface of the first portion 29 including the overhang projection 27 when viewed from the radial direction in the mouth portion 12, and the first portion 29 is formed to be elastically deformable in the radial direction. Therefore, when the locking projection 26 overhangs the overhang projection 27 around the container axis O, the first portion 29 of the mouth portion 12 can be elastically deformed radially inward, thereby suppressing the frictional force generated between the locking projection 26 and the overhang projection 27 and preventing wear on the overhang projection 27.
[0030] The non-penetrating recess 31 formed on the inner circumferential surface of the mouth portion 12 allows the first portion 29 of the mouth portion 12 to be elastically deformable in the radial direction. As a result, wear of the overhanging projection 27 can be suppressed without forming a through hole in the mouth portion 12, and sealing performance between the cap 13 and the mouth portion 12 can be ensured.
[0031] In the circumferential direction along the container axis O, the locking projections 26, the overhang projections 27, the regulating projections 28, and the recesses 31 are provided in the parts where the corners of the outer cylinder 23 and the body of the main cylinder 16 are located, and where it is easy to secure space between the inner circumferential surface of the outer cylinder 23 and the outer circumferential surface of the inner cylinder 22. Therefore, these locking projections 26 and the like can be easily provided.
[0032] Furthermore, the technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.
[0033] For example, the outer cylinder 23 and the body of the main cylinder 16 may have a circular, oval, or elliptical shape when viewed from above. If the outer cylinder 23 and the body of the main cylinder 16 have an oval or elliptical shape when viewed from above, the major and minor axes of the outer cylinder 23 and the body of the main cylinder 16 may be aligned when viewed from above, and the locking projection 26, the overcoming projection 27, the restricting projection 28, and the recess 31 may be positioned at the ends in the direction of the major axis. The first part 29 may include a portion of the overhang projection 27 when viewed from the radial direction. The lower part of the mouth portion 12 may be formed in a single cylindrical shape, for example, without an inner cylindrical portion 12a.
[0034] Furthermore, without departing from the spirit of the present invention, the components in the above embodiments may be replaced with well-known components as appropriate, and the above embodiments and modifications may be combined as appropriate. [Explanation of symbols]
[0035] 1 container with cap 11 Container body 12 Mouth 13 caps 21 First engagement part 22 Inner cylinder 23 Outer cylinder 25 Second engaging part 26 Locking protrusion 27 Overcoming protrusions 28 Restrictive protrusions 29 Part 1 31 Recess O Container axis X Loose side Y tightening side
Claims
1. The container body in which the contents are contained, The container body is equipped with a cap that is detachably attached to the mouth of the container, The cap comprises an inner cylinder detachably attached to the opening and an outer cylinder surrounding the inner cylinder from the radially outer side. On the outer circumferential surface of the opening and the inner circumferential surface of the inner cylinder, a first engaging portion and a second engaging portion are formed, respectively, which engage and separate from each other as the opening and the cap rotate relative to each other around the container axis, thereby allowing the cap to be attached to and detached from the opening. A locking projection is provided in the portion of the inner cylinder located below the second engaging portion. Of the outer circumferential surface of the opening, the portion located below the first engaging portion, The aforementioned locking projection has an overhanging projection that can overcome around the container axis, A restricting projection is formed, which is located on the tightening side along the circumference of the container axis from the aforementioned overhang projection, and which restricts the locking projection from overhanging to the tightening side. A capped container in which, in the mouth portion, a recess is formed on the inner circumferential surface of the first portion including the overhang projection when viewed from the radial direction, and the first portion is formed to be elastically deformable in the radial direction.
2. The outer cylinder and the body of the container have a square shape with multiple corners when viewed from above and below. The positions of the corners in the outer cylinder and the body, respectively, around the container axis coincide. The container with a cap according to claim 1, wherein the locking projection, the overcoming projection, the restricting projection, and the recess are provided in the portion of the circumferential direction along the container axis where the corner portion is located.