Container provided with over-cap

Abstract

To provide a container provided with an over-cap capable of preventing a base-cap from being co-rotated in accordance with rotation of the over-cap, while improving force of engaging the over-cap with the base-cap in a vertical direction.SOLUTION: There are provided a container body 1; a dispenser 3 that is held by a base-cap 2 attached to a mouth neck part 11 in the container body 1, for discharging a content by pushing in a pressing head 32; and an over-cap 4 for covering the dispenser 3 together with the base-cap 2. The over-cap 4 comprises an annular recess 43 circulating around an inner peripheral wall. The base-cap 2 comprises an annular protrusion 27 undercut-engageable in a freely attachable / detachable manner over an entire circumference of the annular recess 43 in the over-cap 4. An engagement protrusion 28 that is wider in engagement width than the annular protrusion 27 of the base-cap 2 is provided at the annular protrusion 27, and engageable at three points or more in a circumferential direction of the annular recess 43 in the over-cap 4.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a container with an overcap, which comprises a container body, a dispenser held at the neck of the container body via a base cap, and an overcap for covering the dispenser together with the base cap. [Background technology]

[0002] Containers equipped with a pressurized head are widely used as containers for holding contents such as cosmetics, hair styling products, etc. These containers are extremely convenient because the pump is activated by pressing down on the pressurized head, allowing the contents held in the container body to be sucked up and easily discharged from the nozzle.

[0003] On the other hand, there is a risk that the pressure head of the container may be unintentionally pressed down and the contents may be dispensed during distribution, handling, etc. For this reason, a container with an overcap is known in which an overcap is detachably attached to the container body so as to cover the pressure head, thereby preventing the pressure head from being operated erroneously (Patent Document 1).

[0004] A container with an overcap can be attached and held in place by, for example, providing a locking protrusion on the outer surface of a base cap that is screwed onto the neck of the container body to hold the pressing head, and undercutting and engaging a locking rib on the inner surface of the overcap with the locking protrusion.At the same time, the overcap can be easily removed by pulling it upward with the fingers when in use. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2022-39082 Summary of the Invention [Problem to be solved by the invention]

[0006] As described above, containers with overcaps are configured so that when in use, the undercut fit can be released by pulling up the overcap with the fingers. However, if the overcap is rotated while attached to the base cap, it is possible that the base cap, which is screwed onto the neck of the container body, will rotate and come off as the overcap rotates, which could allow air to enter the container body and contaminate the contents, or the container body could fall off, causing the contents to spill.

[0007] In particular, in containers with a large filling capacity, even if the overcap is gripped and the product is shaken, the undercut fitting is made large to increase the fitting force between the overcap and the container body so that the container body does not easily fall off the overcap.However, when the overcap rotates, the rotational torque is also large, making the base cap even more likely to rotate with it, and improvements were needed.

[0008] The present invention aims to solve these problems, and its purpose is to provide a container with an overcap that improves the vertical fitting force between the overcap and the base cap (container body) while suppressing an increase in the rotational torque value between the overcap and the base cap, thereby preventing the base cap from rotating as the overcap rotates. [Means for solving the problem]

[0009] The container with an overcap of the present invention is a container with an overcap, comprising: a container body for accommodating contents; a dispenser that is held by a base cap attached to the mouth and neck of the container body and that dispenses the contents accommodated in the container body by pressing a pressure head; and an overcap that covers the dispenser together with the base cap, The overcap has an annular recess circumferentially around an inner peripheral wall thereof, the base cap has an annular protrusion that can be detachably fitted into an undercut over the entire circumference of the annular recess of the overcap, The annular convex portion of the base cap is characterized by having a locking protrusion that has a wider fitting width than the annular convex portion and can fit into the annular recess of the overcap at at least three points in the circumferential direction.

[0010] The container with an overcap of the present invention is a container with an overcap, comprising: a container body for accommodating contents; a dispenser that is held by a base cap attached to the mouth and neck of the container body and that dispenses the contents accommodated in the container body by pressing a pressure head; and an overcap that covers the dispenser together with the base cap, The overcap has an annular protrusion that circumferentially surrounds the inner peripheral wall, the base cap has an annular recess that can be detachably fitted with an undercut over the entire circumference of the annular protrusion of the overcap, The annular convex portion of the overcap is characterized by having a locking protrusion that has a wider fitting width than the annular convex portion and can fit into the annular recess of the base cap at at least three points in the circumferential direction.

[0011] In the container with an overcap of the present invention, the base cap preferably has a threaded portion that is attached to the mouth and neck portion of the container body by screwing.

[0012] In the container with an overcap of the present invention, it is preferable that the locking projection provided on the annular convex portion has a protrusion margin that is larger than that of the annular convex portion. [Effects of the Invention]

[0013] According to the container with overcap of the present invention, the annular recess (or annular protrusion) provided around the inner wall of the overcap and the annular protrusion (or annular recess) provided around the outer wall of the base cap of the container body are undercut fitted around the entire circumference, thereby improving the fitting force in the vertical direction (container axis direction), and preventing the overcap from coming off unintentionally during handling, or the container body from falling off the overcap when the overcap is gripped and the container is shaken.

[0014] Furthermore, the annular protrusion has at least three locking projections with a wider fitting width (vertical width) than the annular protrusion, so that when the overcap is attached to the base cap, the locking projections fit into the annular recess, and a gap is created between the annular protrusion and the annular recess in the vertical direction due to the wider fitting width. This makes it possible to maintain a high fitting force between the overcap and base cap while reducing frictional resistance when the overcap is rotated in the fitted state (no large rotational torque is generated), and to prevent the base cap from rotating in conjunction with the rotation of the overcap.

[0015] Furthermore, according to the present invention, by making the protrusion of the locking protrusion provided on the annular convex portion larger than the protrusion of the annular convex portion, when the overcap is attached to the base cap, a gap is generated between the annular recess (or annular convex portion) of the overcap and the annular convex portion (or annular recess) of the base cap in the radial direction (direction perpendicular to the container axis), which reduces the frictional resistance when the overcap is rotated in the fitted state (no large rotational torque is generated), and prevents the base cap from rotating in conjunction with the rotation of the overcap. [Brief explanation of the drawings]

[0016] [Figure 1] 1A and 1B are diagrams showing one embodiment of a container with an overcap according to the present invention, in which (a) is a partial cross-sectional view, and (b) is an enlarged view of the mating portion between the base cap and cover cap in (a). [Figure 2] 2(a) is a plan view of a base cap constituting the container with an overcap in FIG. 1, and FIG. 2(b) is a side view thereof. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of the present invention will be described with reference to the drawings. In this specification, the vertical direction means a direction along the axis O of the container with the overcap as shown in Figure 1, and the radial direction means a direction perpendicular to the axis O of the container with the overcap.

[0018] FIG. 1 shows one embodiment of a container with an overcap according to the present invention, where (a) is a partial cross-sectional view, (b) is an enlarged view of the mating portion of the base cap and cover cap in (a), and FIG. 2(a) is a plan view of the base cap that constitutes the container with an overcap in FIG. 1, and FIG. 2(b) is a side view.

[0019] In Figures 1 and 2, reference numeral 1 denotes a container body that contains the contents, reference numeral 2 denotes a base cap that is screwed onto the neck portion 11 of the container body 1, reference numeral 3 denotes a dispenser that is inserted through the center of the base cap 2 and includes a pump mechanism 31 that is suspended inside the neck portion 11 and a pressing head 32 that is connected to the pump mechanism 31, and reference numeral 4 denotes an overcap that covers the base cap 2 and the pressing head 32.

[0020] The container body 1 has a filling space for the contents inside and a cylindrical neck portion 11 at the top. The container body 1 can be manufactured using a material such as synthetic resin, but the material is not particularly limited. In addition, in this embodiment, a cylindrical container body 1 is shown as an example, but the shape of the container body can be changed appropriately based on the type of contents, the design of the container, the purpose, etc., and is not limited to the shape shown in the figure.

[0021] The base cap 2 is composed of an inner cylindrical portion 21 and an outer cylindrical portion 22, which are integrally formed by being connected at the upper end. The base cap 2 can be manufactured using a material such as synthetic resin, but the material is not particularly limited. In this embodiment, a cylindrical base cap is shown as an example, but the shape is not limited to the shape shown in the figure.

[0022] The inner tube 21 has a cylindrical shape. The inner tube 21 has a female thread 23 on the inner peripheral wall of the lower tube portion 21a below the approximate center in the vertical direction, and the female thread 23 is threadedly engaged with the male thread 12 provided on the outer peripheral wall of the neck portion 11 of the container body 1, and the base cap 2 can be detachably attached to the neck portion 11 by undercut fitting.

[0023] The inner cylindrical portion 21 has an annular bottom portion 24 extending radially inward from the inner peripheral wall at the upper end position of the lower cylindrical portion 21a, and a fitting portion 25 connected to the inner edge of the bottom portion 24.

[0024] The fitting portion 25 has a first cylindrical portion 25a extending upward from the inner edge of the bottom portion 24 along the axis O of the container with overcap, a circular top portion 25b extending radially inward from the upper end of the first cylindrical portion 25a, and a second cylindrical portion 25c extending downward from the inner edge of the top portion 25b along the axis O.

[0025] The outer cylindrical portion 22 has a cylindrical shape with a larger diameter than the inner cylindrical portion 21, and the outer diameter thereof decreases toward the upper end, with the upper end connected to the upper end of the inner cylindrical portion 21. A flange portion 26 extending radially outward is formed at the lower end of the outer cylindrical portion 22.

[0026] An annular protrusion 27 is formed on the outer peripheral wall of the outer tubular portion 22 so as to go around the outer peripheral wall, and in this embodiment, three locking projections 28 are provided at equal intervals (120 degree intervals) on the annular protrusion 27 as shown in Fig. 2. At least three locking projections 28 are provided on the annular protrusion 27, and the formation intervals can be changed as appropriate and are not limited to those shown in the figure.

[0027] As described below, the annular protrusion 27 and the locking protrusion 28 are arranged to undercut and fit into an annular recess 43 that is arranged around the outer wall of the overcap 4 when the overcap 4 is attached to the base cap 2, thereby improving the vertical fitting force between the overcap 4 and the base cap 2.

[0028] Furthermore, the locking protrusion 28 has a fitting width W2 that is wider than the fitting width W1 (vertical width) of the annular protrusion 27. The fitting width W2 of the locking protrusion 28 shown in FIG. 2(b) is preferably 1.1 to 2.0 times the fitting width W1 of the annular protrusion 27. As a result, when the annular protrusion 27 and the locking protrusion 28 are undercut-fitted into the annular recess 43 of the overcap 4, a narrow gap 5 can be formed between the annular protrusion 27 and the annular recess 43 in the vertical direction due to the wide fitting width W2 of the locking protrusion 28, as shown in FIG. 1(b). This gap 5 can maintain a high fitting force in the vertical direction between the overcap 4 and the base cap 2 (the annular protrusion 27, the locking protrusion 28, and the annular recess 43), while reducing frictional resistance when the overcap 4 is rotated in this fitted state. This prevents a large rotational torque from being generated, and prevents the base cap 2 from rotating together with the overcap 4. In this embodiment, the locking protrusions 28 protrude in the vertical direction from the upper and lower ends of the annular protrusion 27, but it is sufficient that the locking protrusions 28 protrude downward at least from the lower end of the annular protrusion 27, thereby allowing the same effect as in this embodiment to be expected.

[0029] 2(a), the protrusion D of the locking projection 28 from the outer peripheral wall of the outer cylindrical portion 22 is set to be larger than the protrusion d of the annular protrusion 27 from the outer peripheral wall of the outer cylindrical portion 22. This allows a narrow gap 5 to be formed between the annular protrusion 27 and the annular recess 43 in the vertical and radial directions, reducing the frictional resistance of the overcap 4 and effectively preventing the generation of large rotational torque.

[0030] It is preferable that the protrusion length D of the locking projection 28 is approximately 1.5 to 1.9 times the protrusion length d of the annular convex portion 27. By setting it in this range, it is possible to effectively prevent the generation of large rotational torque while maintaining a high mating force in the vertical direction.

[0031] Furthermore, the length L of the locking projection 28 along the circumference of the annular projection 27 is preferably set to about 3% to 6% of the entire circumference of the annular projection 27.

[0032] The dispenser 3 includes a pump mechanism 31 and a pressing head 32 connected to the pump mechanism 31 . The pump mechanism 31 is suspended inside the container body 1 through the neck 11 and is fixedly held in place by undercut fitting or the like on the inner peripheral wall of the second tubular portion 25c of the base cap 2. In this embodiment, a dispenser capable of dispensing highly viscous liquids is used as an example of the container. However, other container configurations, such as a delaminated container, can also be used. The container body has a dual structure consisting of an outer container and an inner container, and the inner container reduces in volume as the contents are dispensed. The pump mechanism 31 operates by repeatedly pressing the pressing head 32, which activates a piston attached to the pump mechanism 31. The contents contained in the container body 1 are drawn into the cylinder 33, pressurized, compressed, and dispensed from the nozzle 34 of the pressing head 32. As the pump mechanism 31 dispenses the contents from the nozzle 34, the inner plate 6 rises as the contents decrease, as shown in FIG. 1(a). This allows the pump mechanism 31 to suck up the contents even if the contents in the container body 1 decrease. The pump mechanism 31 may be of any type as long as it can be driven by pressing the pressure head 32, suck up the contents in the container body 1, and discharge them from the nozzle .

[0033] The overcap 4 is composed of a circular top wall 41 and a cylindrical peripheral wall 42. The overcap 4 is made of polypropylene, but the material is not particularly limited. In this embodiment, a cylindrical shape is shown as an example, but the shape is not limited to the shape shown in the figure.

[0034] 1, when the overcap 4 is attached so as to cover the base cap 2 and the pressing head 32, the lower end of the peripheral wall 42 abuts against the upper end surface of the flange 26 of the base cap 2. In addition, an annular recess 43 is formed on the inner peripheral wall at the lower part of the peripheral wall 42 so as to go around the periphery of the inner peripheral wall.

[0035] When the overcap 4 is placed over the base cap 2 and the pressing head 32 and pressed down from above with the fingers, the annular recess 43 fits into the annular protrusion 27 and the locking projection 28 provided on the outer tube portion 22 of the base cap 2, allowing the overcap 4 to be easily attached to the container body 1. On the other hand, when the overcap 4 is pulled upward, the peripheral wall 42 elastically deforms to expand in diameter, disengaging the annular recess 43 from the protrusion 27 and the locking projection 28, allowing the overcap 4 to be removed.

[0036] In this embodiment, the base cap 2 is provided with the annular convex portion 27 and the locking projection 28, and the overcap 4 is provided with the annular recess 43, but the base cap 2 may be provided with an annular recess, and the overcap 4 may be provided with an annular convex portion and a locking projection, and in this case, the same effects as those described above can be achieved. In this embodiment, the base cap 2 is made of polypropylene, but as described above, the material is not particularly limited. [Industrial Applicability]

[0037] The container with an overcap of the present invention can be suitably used as a container for filling liquid, creamy, viscous cosmetics, food and drink, pharmaceuticals, detergents, etc. [Explanation of symbols]

[0038] 1 Container body 11 Oral and cervical regions 12 Male thread 2 base caps 21 Inner cylinder 21a Lower cylinder part 22 outer cylinder 23 Female thread 24 Bottom 25 Fitting part 25a 1st cylinder part 25b Top 25c 2nd cylinder part 26 Tsuba 27 Annular convex part 28 Locking protrusion 3 Dispenser 31 Pump mechanism 32 Pressing head 33 cylinders 34 nozzles 4 Overcap 41 Top wall 42 Peripheral wall 43 Annular recess 5. Gap 6 medium plates

Claims

1. A container with an overcap, comprising: a container body for accommodating contents; a dispenser that is held by a base cap attached to the mouth and neck of the container body and that dispenses the contents accommodated in the container body by pressing a pressure head; and an overcap that covers the dispenser together with the base cap, The overcap has an annular recess circumferentially around an inner peripheral wall thereof, the base cap has an annular protrusion that can be detachably fitted into an undercut over the entire circumference of the annular recess of the overcap, A container with an overcap, characterized in that the annular convex portion of the base cap is provided with a locking protrusion that has a wider fitting width than the annular convex portion and can fit into the annular recess of the overcap at at least three points circumferentially.

2. A container with an overcap, comprising: a container body for accommodating contents; a dispenser that is held by a base cap attached to the mouth and neck of the container body and that dispenses the contents accommodated in the container body by pressing a pressure head; and an overcap that covers the dispenser together with the base cap, The overcap has an annular protrusion that circumferentially surrounds the inner peripheral wall, the base cap has an annular recess that can be detachably fitted with an undercut over the entire circumference of the annular protrusion of the overcap, A container with an overcap, characterized in that the annular convex portion of the overcap is provided with locking protrusions that have a wider fitting width than the annular convex portion and can fit into the annular recess of the base cap at at least three points circumferentially.

3. 3. The container with an overcap according to claim 1, wherein the base cap has a threaded portion that is attached to the neck of the container body by screwing.

4. 3. The container with an overcap according to claim 1, wherein the locking projection provided on the annular convex portion has a protrusion margin larger than that of the annular convex portion.

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