JP2022157570A - Roll-on coating container - Google Patents

Abstract

To provide a roll-on coating container that maintains excellent sealability although having a plurality of coating balls.SOLUTION: There is provided a roll-on coating container 1 that comprises: a container body 2 which contains a content; a middle plug 3 which is mounted on a mouth part 10 of the container body; and a cap 4 which covers the middle plug from above and is mounted on the mouth part of the container body. The middle plug comprises a plurality of retention parts 20 each having a communication hole 21 linking the inside of the container body and the outside together, and a plurality of coating balls 22 which are held inside the plurality of retention parts to roll and exposed in part upward; the plurality of retention parts each comprises an annular seal part 39 capable of contacting a coating ball from below; the cap comprises a cap body 50 having a cap top wall 52 and a soft seal part 60 formed of a softer material than the cap body and molded integrally on a reverse surface of the cap top wall; and the soft seal part contacts the plurality of coating balls from above and also press the coating balls downward when the cap is mounted on the mouth part of the container body.SELECTED DRAWING: Figure 2

Description

The present invention relates to roll-on application containers.

Conventionally known are roll-on applicator containers equipped with applicator balls.
For example, Patent Literature 1 below discloses a container main body containing contents, an inner plug having an application ball and attached to the mouth of the container main body, and an inner plug covering the inner plug from above and attached to the mouth of the container main body. A roll-on applicator container is known that includes a cap that is
The inner plug has at least a communication hole that communicates the inside and the outside of the container body, and a sealing portion that is arranged below the application ball. By attaching the cap to the mouth of the container body, the application ball can be pressed against the sealing portion, and the communication between the inside and the outside of the container body through the communication hole is cut off, thereby suppressing the leakage of the contents. It is possible to

Further, as a conventional roll-on coating container, a configuration is generally known in which a pressing projection is provided on the top wall of the cap for pressing the coating ball downward when the cap is attached. In this case, it is possible to appropriately press the application ball against the seal portion with a simple configuration that only uses the pressing projection, and to suppress leakage of the contents.

JP 2013-154948 A

By the way, this type of roll-on coating container is provided with a plurality of coating balls in order to be used in various ways according to the type of content and the application. When a plurality of application balls are provided, communication holes through which contents flow out are formed corresponding to the number of application balls. It is required to suppress the exposure of the contents through the holes.

A typical cap is often made of a relatively hard synthetic resin material such as polypropylene, so when providing a pressing projection on the top wall of the cap, it tends to be difficult to form the pressing projection with high molding accuracy. .
Therefore, when there is only one application ball, it is possible to form the pressing projections with little variation, and the communication hole can be maintained in a sealed state by appropriately pressing the application ball against the sealing portion using the pressing projections. However, when there are a plurality of application balls, a plurality of pressing protrusions are required, and it is difficult to form these pressing protrusions with little variation and with high molding accuracy. Therefore, it is difficult to properly press all the application balls against the seal portion, and some application balls are weakly pressed against the seal portion, making it difficult to maintain the sealed state of the communication hole.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a roll-on coating container that can maintain good sealing performance while having a plurality of coating balls. be.

(1) A roll-on application container according to the present invention includes a container body containing a content, an inner plug attached to the mouth of the container body, and covering the inner plug from above and the mouth of the container body. a cap to be attached to the container body, wherein the inner plug includes a plurality of holding portions having a communication hole communicating between the inside and the outside of the container body; and a plurality of application balls partially exposed from the holding portion, each of the plurality of holding portions having an annular seal portion capable of contacting the outer surface of the application ball from below, The cap includes a cap body having a cap top wall that covers the inner plug from above, and a soft seal part formed of a material softer than the cap body and integrally formed on the lower surface of the cap top wall. When the cap is attached to the mouth of the container body, the soft seal portion contacts the plurality of application balls from above and pushes the application balls downward.

According to the roll-on application container according to the present invention, by attaching the cap to the mouth of the container body, the soft seal portion can be brought into contact with the plurality of application balls from above, and each of the plurality of application balls can be can be pushed downwards. Thereby, each of the plurality of application balls can be pressed against the annular seal portion, and the communication between the inside and the outside of the container body through the communication hole can be blocked.

In particular, the cap main body is made of, for example, a general hard synthetic resin material, while the soft sealing portion is made of a material softer than the cap main body, such as an elastically deformable soft material such as elastomer or rubber. be able to. Therefore, all the application balls can be appropriately pushed downward while elastically deforming the soft seal portion appropriately. Therefore, it is difficult to be affected by the molding accuracy of the cap main body and the soft seal portion, and all the application balls are simultaneously pushed in with a sufficient pressing force while elastically deforming the soft seal portion corresponding to the relative positional relationship with each application ball. be able to. Thereby, it is possible to appropriately prevent the contents from being exposed through the communication hole. Furthermore, even if the cap is repeatedly attached to the mouth portion of the container body, the so-called "fit-in" phenomenon, which is a phenomenon in which the soft seal portion weakens due to plastic deformation, hardly occurs. As a result, it is possible to stably maintain the sealing performance over a long period of time when the cap is attached.

(2) The cap top wall is formed with a connecting hole vertically penetrating the cap top wall, and the soft seal portion includes a seal body arranged on the lower surface of the cap top wall and an integral part of the seal body. a seal shaft formed in and disposed inside the connecting hole and having an upper end surface exposed to the upper surface side of the cap top wall, and the upper end surface of the seal shaft is provided with the soft seal portion Gate traces at the time of molding may remain, and a closing body may be provided on the top wall of the cap to cover at least the seal shaft portion from above.

In this case, the soft seal portion can be molded integrally with the cap main body by molding (for example, injection molding) so that the gate mark remains on the upper end face of the seal shaft portion. Therefore, the seal body, which is placed on the lower surface of the top wall of the cap and is in contact with the multiple application balls, does not leave gate marks or molding residue. can be finished. Therefore, the seal main body can be elastically deformed appropriately, and a plurality of application balls can be reliably pushed.
Furthermore, since the cap top wall is provided with a closing body, the seal shaft part with gate traces or the like can be covered and hidden, and the appearance is improved, and the design, etc., can be improved. can be done.

(3) The soft seal portion is integrally formed with the seal shaft portion and includes a seal reinforcing portion disposed on the upper surface of the cap top wall, and the closing body further extends the seal reinforcing portion from above. You can cover it.

In this case, the soft seal portion can be formed integrally with the cap body so that the top wall of the cap is sandwiched between the seal body and the seal reinforcing portion, so that the soft seal portion can be made stronger with respect to the cap body. Can be combined. Therefore, even when the cap is attached to the mouth of the container body by screwing, for example, the soft seal may be unintentionally rotated or removed due to the rotational torque associated with the rotational operation of the cap. Inconvenience such as this can be suppressed.

ADVANTAGE OF THE INVENTION According to the roll-on application container which concerns on this invention, although it has several application balls, a favorable sealing property can be maintained.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view (a side view is included) which shows embodiment of the roll-on application container which concerns on this invention. FIG. 2 is an enlarged vertical cross-sectional view of the periphery of the inner plug of the roll-on application container shown in FIG. 1; FIG. 3 is a longitudinal sectional view showing a state in which the cap is removed from the state shown in FIG. 2; 4 is a top view of the inner plug shown in FIG. 3 as viewed from above; FIG.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the roll-on application container which concerns on this invention is described with reference to drawings.
As shown in FIG. 1, the roll-on application container 1 of the present embodiment includes a bottomed cylindrical container body 2 for containing the contents, an inner plug 3 attached to the mouth portion 10 of the container body 2, and a container and a truncated tubular cap 4 detachably attached to the mouth portion 10 of the main body 2 .

The content contained in the container body 2 is not particularly limited, but examples thereof include liquids such as hair restorers, medicines, and cosmetics to be applied to the scalp, skin, etc. of the human body. However, the contents are not limited to those for the human body, and liquids to be applied to other than the human body may also be used.

In FIG. 1, the container body 2 and the cap 4 are arranged with their central axes on a common axis. Hereinafter, this common axis will be referred to as a container axis O, the cap 4 side along the container axis O will be referred to as the upper side, and the container main body 2 side that is the opposite side will be referred to as the lower side. Further, in a plan view seen from the direction of the container axis O, a direction intersecting with the container axis O is called a radial direction, and a direction rotating around the container axis O is called a circumferential direction.

(container body)
The container body 2 is formed in a bottomed tubular shape in which a mouth portion 10, a shoulder portion 11, a body portion 12 and a bottom portion 13 are successively arranged from above. In the illustrated example, the body portion 12 is formed in a long cylindrical shape extending straight in the vertical direction. However, the shape of the container body 2 is not limited to this case, and various shapes may be adopted.

The mouth portion 10 of the container body 2 is formed to extend upward from the upper end opening of the shoulder portion 11 .
The mouth portion 10 of this embodiment is formed in a two-stage cylindrical shape in which the outer diameter is gradually reduced from the bottom to the top. Specifically, the mouth portion 10 includes a first mouth portion 15 formed to have a smaller outer diameter than portions of the container body 2 other than the mouth portion 10 (shoulder portion 11, body portion 12, and bottom portion 13); and a second opening 16 arranged above the first opening 15 and having an outer diameter smaller than that of the first opening 15 .

A first threaded portion (for example, a female thread) 17 is formed on the outer peripheral surface of the first mouth portion 15 . A first engaging protrusion 18 is formed on the outer peripheral surface of the second mouth portion 16 so as to protrude radially outward and extend along the circumferential direction. In addition, the first engaging projection 18 may be formed in an annular shape over the entire circumference of the second mouth portion 16, or may be formed in plural at intervals in the circumferential direction.
However, it is not limited to the case of forming the first engaging projections 18 , and for example, female threads may be formed on the outer peripheral surface of the second mouth portion 16 instead of the first engaging projections 18 .

(Inner plug)
As shown in FIGS. 2 and 3, the inner plug 3 has a plurality of holding portions 20 each having a communication hole 21 communicating between the inside and the outside of the container body 2, and can roll inside the plurality of holding portions 20. A plurality of application balls 22 are held (rotatably) and partially exposed upward from the holding portion 20 .
In this embodiment, a configuration including three application balls 22, that is, a configuration in which the application balls 22 are held inside three holding portions 20 so as to be able to roll will be described as an example.

As shown in FIG. 4, the three holding parts 20 and the application balls 22 are arranged so as to be arranged at equal intervals in the circumferential direction around the container axis O. As shown in FIG. That is, the three holding parts 20 and the application balls 22 are arranged at intervals of 120 degrees with the container axis O as the center.

As shown in FIGS. 2 and 3, the inner plug 3 includes a first inner plug 30 attached to the second mouth portion 16 of the container body 2, and a first inner plug 30 disposed above the first inner plug 30, and and a second inner plug 40 combined with the plug 30 . The first inner plug 30 and the second inner plug 40 are made of synthetic resin such as low-density polyethylene, and are formed by injection molding or the like.

The first inner plug 30 includes a mounting cylinder 31 surrounding the second opening 16 of the container body 2 from the outside in the radial direction, and a mounting cylinder 31 that protrudes radially inward from the upper end of the mounting cylinder 31 and the second opening. 16, an annular flange portion 32 that contacts the upper end opening edge of the flange portion 32, a seal cylinder 33 that protrudes downward from the inner peripheral edge portion of the flange portion 32 and is fitted inside the second mouth portion 16, and the flange portion. A connecting tube 34 protruding upward from 32 and a top wall portion 35 closing an upper end opening of the connecting tube 34 are provided.

The mounting cylinder 31 is undercut-fitted to the second opening 16 . Specifically, on the inner peripheral surface of the lower end portion of the mounting cylinder 31, a second engaging projection 36 that engages with the first engaging projection 18 formed on the second opening 16 is directed radially inward. It is formed so as to protrude. The second engaging projection 36 is undercut-fitted to the first engaging projection 18 .
The second engaging projections 36 may be formed in an annular shape as long as they are undercut-fittable with respect to the first engaging projections 18, and a plurality of the second engaging projections 36 are formed at intervals in the circumferential direction. It doesn't matter if

The first inner plug 30 is fitted and fixed to the second opening 16 of the container body 2 by undercutting the second engaging projection 36 with the first engaging projection 18 . As a result, the first inner plug 30 can be attached to the second mouth portion 16 of the container body 2, and the two are combined together.
However, the method of attaching the first inner plug 30 to the second mouth portion 16 of the container body 2 is not limited to undercut fitting. For example, as described above, when a female thread is formed on the outer peripheral surface of the second opening 16, a male thread is formed on the inner peripheral surface of the mounting cylinder 31 to be screwed into the female thread. Alternatively, the first inner plug 30 may be attached to the second mouth portion 16 .

The seal cylinder 33 is tightly fitted to the inside of the second opening 16, for example. Thereby, the seal tube 33 properly seals the container body 2 .
The connecting tube 34 is formed to extend upward from the inner peripheral edge of the flange portion 32 . The connecting tube 34 is formed with an outer diameter smaller than the outer diameter of the mounting tube 31 . The inner diameter of the connecting cylinder 34 is the same as the inner diameter of the seal cylinder 33 .
A third engaging projection 37 is formed on the outer peripheral surface of the connecting tube 34 so as to protrude radially outward and extend along the circumferential direction. In addition, the third engaging projection 37 may be formed in an annular shape over the entire circumference of the connecting tube 34, or may be formed in plurality at intervals in the circumferential direction.

The top wall portion 35 is connected to the upper end portion of the connecting cylinder 34 . The top wall portion 35 is formed with a communication hole 21 that penetrates the top wall portion 35 in the vertical direction and communicates the inside and the outside of the container body 2 .
Three communication holes 21 are formed so as to be arranged at equal intervals in the circumferential direction around the container axis O. As shown in FIG. That is, the three communication holes 21 are arranged at intervals of 120 degrees around the container axis O. As shown in FIG. A center line passing through the center of the communication hole 21 in the vertical direction is called an application axis C. As shown in FIG.

Furthermore, three support cylinders 38 extending upward are formed coaxially with the application axis C on the top wall portion 35 . As a result, the inside of the support tube 38 communicates with the interior of the container body 2 through the communication hole 21 . A part of the support tube 38 is formed integrally with the connection tube 34 .
The three application balls 22 are arranged above the support cylinders 38 and are supported by the support cylinders 38 from below so as to be able to roll.

A lower annular seal portion (annular seal portion according to the present invention) 39 is formed on the upper end surface of the support tube 38 so as to protrude upward and contact the outer surface of the application ball 22 from below. The lower annular seal portion 39 can be in close contact with the outer surface of the application ball 22 over the entire circumference.
The support cylinder 38 is formed with an outer diameter that is the same as the diameter of the application ball 22 or slightly larger than the diameter of the application ball 22 .

The second inner plug 40 is combined with the first inner plug 30 so as to cover the first inner plug 30 from above. The second inner plug 40 includes an outer shell 41 that surrounds the connecting tube 34 of the first inner plug 30 from the outside in the radial direction, and a top wall 42 that covers the entire top wall 35 including the three support tubes 38 from above. , is equipped with

The outer tube 41 is formed to have the same outer diameter as the mounting tube 31 . The outer tube 41 is undercut-fitted to the connecting tube 34 . Specifically, on the inner peripheral surface of the lower end portion of the outer shell tube 41, a fourth engaging protrusion 43 that engages with a third engaging protrusion 37 formed on the connecting tube 34 protrudes radially inward. is formed to The fourth engaging projection 43 is undercut-fitted to the third engaging projection 37 .
Thereby, the second inner plug 40 is integrally combined with the first inner plug 30 by undercut fitting.

The outer peripheral edge of the ceiling wall portion 42 has a rounded shape that gradually decreases in diameter from the bottom to the top. Furthermore, the portion of the ceiling wall portion 42 that faces the three support cylinders 38 in the vertical direction penetrates the ceiling wall portion 42 in the vertical direction and accommodates each of the three support cylinders 38 therein. Three holding holes 44 are formed coaxially with the coating axis C. As shown in FIG.

The inner diameter of the lower portion of the holding hole 44 is the same as the outer diameter of the support cylinder 38 . As a result, the support tube 38 is tightly fitted inside the holding hole 44 . Inside the holding hole 44 , a space located above the support cylinder 38 is an inner plug space 45 that accommodates the application ball 22 so that it can roll.
The inner plug space 45 communicates with the inside of the support cylinder 38 . As a result, the inside of the container body 2 communicates with the outside through the communication hole 21 , the inside of the support cylinder 38 and the inner plug space 45 .

The inner diameter of the upper portion of the holding hole 44 located above the support tube 38 gradually decreases upward. As a result, the inner diameter of the upper portion of the holding hole 44 is smaller than the diameter of the application ball 22 . Therefore, the application ball 22 can be rotatably held in the inner plug space 45 of the holding hole 44 while being prevented from coming off upward.
As a result, the support tube 38 and the holding hole 44 function as the holding portion 20 that holds the application ball 22 so that it can roll.

The inner peripheral surface of the upper portion of the holding hole 44 forms an upper annular seal portion 46 that can come into contact with the outer surface of the application ball 22 from outside and above in the radial direction. The upper annular seal portion 46 can be in close contact with the outer surface of the application ball 22 over the entire circumference.

The application ball 22 is rotatably held by each of the three holders 20 . That is, each application ball 22 is rotatably arranged in the inner plug space 45 in the holding hole 44 while being supported from below by the support cylinder 38 . The application ball 22 is formed in a spherical shape centered on the application axis C, and is made of metal, for example.
The upper end of the application ball 22 protrudes upward from the upper end opening of the holding hole 44 and is exposed to the outside. As a result, it is possible to apply the content using the portion of the application ball 22 that is exposed to the outside.

By combining the first inner plug 30 with the second inner plug 40 from above, the three application balls 22 are placed on the lower ring-shaped seal portion 39 of each support tube 38 and can be removed upward. It is arranged in the inner plug space 45 of the holding hole 44 in a locked state. Further, the application ball 22 is vertically movable between the lower annular seal portion 39 and the upper annular seal portion 46 in the inner plug space 45 .

(cap)
As shown in FIG. 2, the cap 4 includes a topped cylindrical cap body 50 that covers the inner plug 3 from above, and a soft sealing portion that is formed of a material softer than the cap body 50 and integrally formed with the cap body 50. 60 and.

The cap main body 50 closes the cap peripheral wall 51 surrounding the inner plug 3 and the mouth portion 10 (the first mouth portion 15 and the second mouth portion 16) of the container body 2 from the outside in the radial direction, and the upper end opening of the cap peripheral wall 51. and a cap top wall 52 covering the inner plug 3 from above.
Further, the cap main body 50 of the present embodiment includes a decorative cylinder 53 formed so as to extend further upward from the cap top wall 52 . In the illustrated example, the cosmetic cylinder 53 is formed to have the same outer diameter as the cap peripheral wall 51 .

A second threaded portion (for example, a male threaded portion) 54 is formed on the inner peripheral surface of the cap peripheral wall 51 on the lower end side thereof so as to be screwed into the first threaded portion 17 formed in the first mouth portion 15 of the container body 2 . there is As a result, the entire cap 4 is detachably attached to the mouth portion 10 of the container body 2 by screwing the second threaded portion 54 onto the first threaded portion 17 .
However, the method of attaching the cap 4 to the mouth portion 10 of the container body 2 is not limited to screwing (screw coupling). And I don't mind wearing it.

The cap ceiling wall 52 is arranged above the application balls 22 while being spaced apart from the three application balls 22 protruding above the second inner plug 40 . A connecting hole 55 is formed in the central portion of the cap ceiling wall 52 so as to penetrate the cap ceiling wall 52 in the vertical direction. The connecting hole 55 is formed, for example, in a circular shape in plan view, and is arranged at the same time as the container axis O. As shown in FIG.
However, the formation position of the connecting hole 55 does not have to be coaxial with the container axis O, and may be formed at a position deviated from the container axis O in the radial direction.

The cap body 50 configured as described above is a molded product molded from, for example, a general hard synthetic resin material (such as polypropylene).
As described above, the soft seal portion 60 is made of a material softer than the cap main body 50 , such as an elastically deformable soft material such as elastomer or rubber, and is integrally formed with the cap main body 50 . Specifically, the soft seal portion 60 is integrally formed with the cap main body 50, which is a primary molded product, by insert molding or the like, for example.

The soft seal portion 60 is formed integrally with a seal body 61 arranged on the lower surface of the cap ceiling wall 52 and the seal body 61, is arranged inside the connecting hole 55, and has an upper end surface A seal shaft portion 62 exposed to the side and a seal reinforcing portion 63 formed integrally with the seal shaft portion 62 and arranged on the upper surface of the cap top wall 52 are provided.

The seal body 61 is formed in a disk shape capable of covering the three application balls 22 from above, and is arranged coaxially with the container axis O. As shown in FIG. The seal body 61 is formed with a thickness such that it comes into contact with the three application balls 22 from above when the cap 4 is attached to the mouth portion 10 of the container body 2 . This allows the seal body 61 to push the three application balls 22 downward.

The seal shaft portion 62 protrudes upward from the cap top wall 52, and a gate mark (including molding residue) 64 remains on the upper end surface of the seal shaft portion 62 when the soft seal portion 60 was molded. The seal reinforcing portion 63 is formed integrally with the seal shaft portion 62 and has a disk shape larger than the seal main body 61 .
As described above, the soft seal portion 60 is formed integrally with the cap body 50 so that the cap ceiling wall 52 is sandwiched between the seal body 61 and the seal reinforcing portion 63 from above and below.

The cap ceiling wall 52 is provided with a decorative cap (closure body according to the present invention) 70 that covers the seal shaft portion 62 and the seal reinforcing portion 63 from above. The cosmetic cap 70 is formed in a truncated tubular shape coaxial with the container axis O and is fitted inside the upper end portion of the cosmetic cylinder 53 . Thus, the cosmetic cap 70 closes the upper end opening of the cosmetic cylinder 53 and also serves to cover and hide the seal shaft portion 62 and the seal reinforcing portion 63 from above.

(Action of roll-on application container)
Next, the case of using the roll-on coating container 1 configured as described above will be described.
First, as shown in FIGS. 1 and 2, when the cap 4 is attached to the mouth portion 10 of the container body 2, the application ball 22 is pushed downward by the soft seal portion 60, thereby closing the lower annular seal portion. It is in a state of being pressed against 39.

When the contents are to be applied, as shown in FIGS. 1 and 2, the cap 4 is removed from the mouth portion 10 of the container body 2 in an upright posture with the mouth portion 10 of the container body 2 facing upward. As a result, as shown in FIG. 3, the application ball 22 is released from being pushed downward by the soft seal portion 60, and is allowed to move upward.

Next, the container body 2 shown in FIG. 3 is tilted or inverted so that the mouth portion 10 of the container body 2 faces downward, so that the application ball 22 is moved to the upper annular seal portion 46 side in the inner plug space 45 . , and can be spaced apart from the lower annular seal portion 39 . As a result, a gap can be formed between the lower annular seal portion 39 and the outer surface of the application ball 22 to allow communication between the inside of the container body 2 and the inside of the inner plug space 45 . Contents can be dispensed into the plug space 45 .

At this time, the outer surface of the application ball 22 and the upper annular seal portion 46 can be brought into close contact with each other, so that the contents can be directed from the inner plug space 45 to the outside through the space between the outer surface of the application ball 22 and the upper annular seal portion 46 . It can prevent things from flowing out.

Next, the part of the application ball 22 that is exposed to the outside beyond the inner plug 3 is pressed against an object to be applied (not shown), thereby moving the application ball 22 toward the lower annular seal portion 39 in the inner plug space 45 . A gap communicating with the inner plug space 45 can be defined between the upper annular seal portion 46 and the outer surface of the application ball 22 . By moving the container body 2 along the application object while pressing the application ball 22 against the application object, the application ball 22 can be rolled (rotated) in the inner plug space 45 . As a result, the contents in the inner plug space 45 flow out of the inner plug 3 through the gap defined between the upper annular seal portion 46 and the outer surface of the applicator ball 22 as the applicator ball 22 rotates. can be made As a result, the content transferred to the outer surface of the application ball 22 can be applied to the object to be applied.

When the application ball 22 is pressed against the object to be coated, the application ball 22 is pressed against the lower annular seal portion 39 and the communication hole 21 is kept sealed. Therefore, it is possible to prevent the contents from being excessively supplied from the inside of the container body 2 into the inner plug space 45 .

As described above, the application ball 22 can be used to apply the content to the object to be applied. In particular, in this embodiment, since three application balls 22 are provided, it is possible to effectively apply the contents to a wide area of the object to be applied in a single application operation, and the application can be used in a variety of ways. .
For example, when the contents are stored in the inner plug space 45, the contents can be applied while the container main body 2 is in the upright position without being in the tilted or inverted position.

Next, when the application of the contents is finished, the cap 4 is screwed onto the mouth portion 10 of the container body 2 as shown in FIGS. 1 and 2 .
As a result, the seal body 61 of the soft seal portion 60 can be brought into contact with the three application balls 22 from above, and each of the three application balls 22 can be pushed downward. Therefore, each of the three application balls 22 can be pressed against the lower annular seal portion 39, and communication between the inside and outside of the container body 2 through the communication hole 21 can be blocked.

In particular, since the soft seal portion 60 is made of an elastically deformable soft material that is softer than the cap main body 50, all the application balls 22 can be displaced while the seal main body 61 of the soft seal portion 60 is appropriately elastically deformed. can be properly pushed downwards. Therefore, it is difficult to be affected by the molding accuracy of the cap body 50 and the soft seal portion 60, and while elastically deforming the seal body 61 of the soft seal portion 60 corresponding to the relative positional relationship with each application ball 22, all the application balls can be formed. 22 can be pushed in at the same time with a sufficient pushing force.

Thereby, it is possible to appropriately prevent the contents from being exposed through the communication hole 21 . Furthermore, even if the cap 4 is repeatedly attached to the mouth portion 10 of the container body 2, the so-called "fit-in" phenomenon, in which the soft seal portion 60 is deformed due to plastic deformation, hardly occurs. As a result, the sealing performance of the cap 4 when attached can be stably maintained over a long period of time.

The thickness of the seal body 61 (thickness in the vertical direction) is preferably 0.5 mm or more and 2 mm or less, for example.
If the thickness of the seal body 61 is less than 0.5 mm, it may become difficult to maintain the pressing force against the application ball 22 . Conversely, if the thickness of the seal body 61 exceeds 2 mm, the elastic restoring force of the seal body 61 itself tends to be excessive. Therefore, the thickness of the seal body 61 is preferably within the above range (0.5 mm or more and 2 mm or less).
Furthermore, the interference (overlapping amount) between the seal body 61 and the application ball 22 is preferably within a range of 30% to 40% of the thickness of the seal body 61, for example. In this embodiment, the thickness of the seal body 61 is 1 mm, and the interference is 0.3 mm.

As described above, according to the roll-on coating container 1 of the present embodiment, it is possible to maintain good sealing performance while having three coating balls 22 . Therefore, it is possible to prevent the contents from unintentionally leaking out during product distribution, unused, storage, etc., and to properly store the contents without causing deterioration of the contents. .

Furthermore, since the soft seal portion 60 can be integrally formed with the cap body 50 so that the cap ceiling wall 52 is sandwiched between the seal body 61 and the seal reinforcement portion 63 from above and below, the soft seal portion 60 can be formed with respect to the cap body 50 . can be combined more strongly. Therefore, even when the cap 4 is screwed onto the mouth portion 10 of the container body 2, the rotational torque associated with the rotational operation of the cap 4 causes the soft seal portion 60 to rotate unintentionally. Alternatively, it is possible to suppress inconvenience such as being taken off.

Furthermore, the soft seal portion 60 can be molded integrally with the cap body 50 by molding (for example, injection molding) so that the gate mark 64 remains on the upper end face of the seal shaft portion 62 . Therefore, the seal body 61, which is arranged on the lower surface of the cap top wall 52 and contacts the three application balls 22, does not leave gate marks or molding residue. etc., can be finished as designed. Therefore, the seal body 61 can be appropriately elastically deformed, and the three application balls 22 can be reliably pushed.

Furthermore, since the decorative cylinder 53 is provided on the cap top wall 52 and the decorative cap 70 is fitted inside the decorative cylinder 53, the seal shaft portion 62 and the seal reinforcement portion 63 with the gate marks 64 remaining are covered from above. can be hidden. Therefore, the external appearance of the roll-on coating container 1 can be improved, and the design, etc. can be improved.

Although the embodiment of the present invention has been described above, the present embodiment is presented as an example and is not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. Modifications may be combined as appropriate. Furthermore, the present embodiment and its modifications include, for example, those that can be easily assumed by those skilled in the art, those that are substantially the same, and those within an equivalent range.

For example, in the above-described embodiment, the configuration includes three application balls 22, but the number of application balls 22 is not limited to three. I do not care. In this case, communication holes 21 and holding portions 20 may be provided corresponding to the number of application balls 22 .

Furthermore, in the above embodiment, the case where the inner plug 3 is configured by combining the first inner plug 30 and the second inner plug 40 has been described as an example. An inner plug having two holding cylinders may be formed as a single body.
Furthermore, in the above-described embodiment, the cosmetic cap 70 is fitted inside the cosmetic tube 53 to cover and hide the seal shaft portion 62 and the seal reinforcing portion 63 from above, but the present invention is not limited to this case. do not have. For example, a decorative cap may be directly attached to the upper surface of the cap ceiling wall 52 to cover and hide the seal shaft portion 62 and the seal reinforcing portion 63 from above.

DESCRIPTION OF SYMBOLS 1... Roll-on application container 2... Container main body 3... Inner plug 4... Cap 10... Mouth part of container main body 20... Holding part 21... Communication hole 22... Application ball 39... Lower annular seal part (annular seal part)
DESCRIPTION OF SYMBOLS 50... Cap main body 55... Connection hole 60... Soft seal part 61... Seal main body 62... Seal shaft part 64... Gate mark 63... Seal reinforcing part 70... Decorative cap (closure body)

Claims (3)

a container body in which contents are accommodated;
an inner plug attached to the mouth of the container body;
a cap that covers the inner plug from above and is attached to the mouth of the container body,
The inner plug is
a plurality of holding portions having communication holes communicating between the inside and the outside of the container body;
a plurality of application balls that are rotatably held inside the plurality of holding parts and part of which is exposed upward from the holding part;
each of the plurality of holding portions includes an annular seal portion capable of contacting the outer surface of the application ball from below;
The cap is
a cap body having a cap top wall covering the inner plug from above;
a soft seal part formed of a material softer than the cap main body and integrally formed on the lower surface of the cap top wall,
A roll-on application container, wherein the soft seal portion contacts the plurality of application balls from above and pushes the application balls downward when the cap is attached to the mouth portion of the container body. . In the roll-on application container according to claim 1,
A connecting hole is formed in the cap top wall so as to vertically penetrate the cap top wall,
The soft seal portion is
a seal body arranged on the lower surface of the cap top wall;
a seal shaft integrally formed with the seal main body and arranged inside the connecting hole, the upper end surface of which is exposed to the upper surface side of the cap top wall;
Gate traces from molding of the soft seal portion remain on the upper end surface of the seal shaft portion,
A roll-on application container, wherein the cap top wall is provided with a closing body that covers at least the seal shaft portion from above. In the roll-on application container according to claim 2,
The soft seal portion is integrally formed with the seal shaft portion and includes a seal reinforcing portion disposed on the upper surface of the cap top wall,
The roll-on application container, wherein the closure further covers the seal reinforcing portion from above.

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