JP2010189046A - Bottle cap and beverage bottle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bottle cap capable of holding a storing part stably in an air-tight manner without excessively increasing a plug opening torque for an inner cylindrical member. <P>SOLUTION: A bottle cap 10 is released from a storing part 22 while a bottom lid member is depressed against the lower end of an outer cylindrical part 32 by an operation in which a cap part 26 screwed on an outer cylindrical part 32 is screwed and moved in an opening direction in respect to the outer cylindrical part 32. The bottle cap 10 is constructed such that a contact ring 23 forcedly contacted against the upper end surface 332 of the outer cylindrical part 32 under a state in which the cap part 26 is screwed on the outer cylindrical part 32 is formed around the storing part 22 in a circumferential winding manner within the cap part 26. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bottle cap and a beverage bottle.

As a bottle cap that closes the bottle mouth filled with beverages, a combination of an inner cylinder member having an accommodating part containing a raw material such as powder inside and an outer cylinder member attached to the bottle mouth is proposed. (See, for example, Patent Document 1 below).
The inner cylinder member is detachably threadedly attached to the outer cylinder member, and the outer cylinder member is fixedly attached to the bottle mouth. And the bottom cover which has closed the accommodating part is removed in conjunction with the opening operation of the inner cylinder member, and the raw material is discharged into the bottle body.

  In this type of bottle cap, the airtightness of the accommodating portion becomes a problem. In the invention described in Patent Literature 1 below, an inner ring (sealing ring) that is press-fitted into the upper end opening of the outer cylinder member (parent cap) and seals the opening is provided on the lower surface of the top portion of the inner cylinder member (child cap). . Then, the flat upper end surface of the outer cylinder member is pressed against the inner cylinder member, thereby achieving airtightness between the outside air and the accommodating portion (inner cylinder).

JP 2004-106888 A

However, in the bottle cap described in Patent Document 1, in order to obtain high airtightness between the top bottom surface of the inner cylinder member and the upper end opening of the outer cylinder member, the two are strongly screwed to each other. It is necessary to make the upper end surface of the member sufficiently adhere to the lower surface of the top portion of the inner cylinder member. This is because it is difficult to obtain sufficient airtightness only by the adhesion between the peripheral surface of the inner ring and the inner surface of the upper end opening of the outer cylinder member in forming the bottle cap.
At this time, if the inner cylinder member is strongly screwed with the outer cylinder member for the purpose of sufficiently obtaining the airtightness between the outside air and the accommodating portion (inner cylinder), the tightening torque of the inner cylinder member becomes excessive, There is a problem that it is difficult for a user (general consumer) to open the cap.

  The present invention has been made in view of the above problems, and provides a bottle cap and a beverage bottle that can stably and airtightly hold a container without excessively increasing the opening torque of an inner cylinder member. It is.

The bottle cap of the present invention has a cylindrical housing part that is open at the lower end and can accommodate the input, and an inner cylinder member having a cap part that closes the upper end of the housing part,
The cap portion is detachably screwed to the open upper end, the housing portion is inserted therein, and the open lower end is inserted into the bottle mouth portion together with the housing portion. An outer cylinder member to be attached to the bottle mouth portion;
A bottom lid member that seals the accommodating portion by removably fitting the lower end of the accommodating portion;
And the cap part screwed and attached to the outer cylinder part is screwed in the opening direction with respect to the outer cylinder part, so that the bottom cover member is pushed down to the lower end of the outer cylinder part and the A bottle cap that is detached from the housing part,
Inside the cap portion, a contact ring that presses against the upper end surface of the outer cylinder portion in a state in which the cap portion is screwed to the outer cylinder portion, circulates around the housing portion. It is formed to protrude.

Further, in the bottle cap of the present invention, the cap portion comprises a top plate portion that closes the upper end of the housing portion, and a spiral portion that is screwed into the outer cylinder portion,
The contact ring may be erected on the lower surface of the top plate portion and may have a tapered shape that becomes narrower toward the lower end.

Further, in the bottle cap of the present invention, the direction perpendicular to the upper end surface of the outer cylinder portion is inclined with respect to the screwing direction of the cap portion,
The width center of the longitudinal section of the contact ring may be inclined in a direction common to the perpendicular direction with respect to the screwing direction.

  In the bottle cap of the present invention, the upper end surface is inclined downward inward, and the width direction of the vertical direction of the upper end surface and the longitudinal section of the contact ring is downwardly inclined downward. Good.

  In the bottle cap of the present invention, the lower surface of the top plate portion is inserted into the upper end of the outer cylinder portion together with the housing portion in a state where the cap portion is screwed to the outer cylinder portion. An inner ring may be further formed.

  In the bottle cap of the present invention, the inner ring may be press-fitted into the upper end of the outer cylinder part in a state where the cap part is screwed and attached to the outer cylinder part.

  In the bottle cap of the present invention, the contact ring and the inner ring may be integrally formed of the same material as the top plate portion of the cap portion.

The beverage bottle of the present invention has a bottle body in which a beverage is accommodated and a bottle mouth portion is formed at the upper end, and the bottle cap attached to the bottle mouth portion of the bottle body,
The input is mixed with the beverage by screwing the cap portion in the opening direction and detaching the bottom lid member from the accommodating portion.

  The various components of the present invention do not necessarily have to be independent of each other. A plurality of components are formed as a single member, and a single component is formed of a plurality of members. It may be that a certain component is a part of another component, a part of a certain component overlaps with a part of another component, or the like.

  Further, in the present invention, the vertical direction is defined, but this is defined for the sake of convenience in order to briefly explain the relative relationship between the components. Therefore, it does not limit the direction at the time of manufacturing or transporting a product implementing the present invention.

The bottle cap and the beverage bottle of the present invention are configured such that the contact ring formed so as to protrude around the housing portion in a circular shape is pressed against the upper end surface of the outer cylinder portion, so that the inner cylinder member and the outer cylinder portion The airtightness in between is aimed at. With this configuration, the airtightness is improved as compared with the conventional technique in which the bottom surface of the inner cylinder member and the upper end surface of the outer cylinder portion are pressed against each other to obtain airtightness. This is because when the contact ring is pressed against the upper end surface of the outer cylinder portion by the tightening force generated by screwing the inner cylinder member into the outer cylinder portion, the projecting contact ring is deformed and comes into close contact with the upper end surface. is there. That is, when the top bottom surface of the inner cylinder member and the upper end surface of the outer cylinder part are brought into contact with each other as in the conventional case, a gap is likely to be generated between the surfaces due to the manufacturing tolerance of the bottle cap. In the invention, such a problem can be solved and high airtightness can be obtained.
Therefore, in the present invention, when airtightness equivalent to that of the conventional bottle cap is obtained, the tightening torque of the inner cylinder member with respect to the outer cylinder portion can be reduced, and the user can easily open the plug. In other words, according to the present invention, it is possible to improve the airtightness between the inner cylinder member and the outer cylinder member corresponding to the path from the outside air to the housing portion without increasing the opening torque of the inner cylinder member. .

It is a front view which shows the bottle for drinks with which the bottle cap which concerns on embodiment of this invention was mounted | worn with the bottle mouth part of the bottle main body. It is a vertical front view which shows the assembly structure of the bottle cap which concerns on embodiment of this invention, and the bottle for drinks. It is a vertical front view which shows the state with which the bottle cap which concerns on embodiment of this invention is mounted | worn with the bottle main body. FIG. 4 is an enlarged view of a region surrounded by a circle IV in FIG. 3, showing a state in which a cap portion of an inner cylinder member is screwed to an outer cylinder portion of an outer cylinder member. It is a longitudinal cross-sectional view of the inner cylinder member and outer cylinder member which concern on a modification. It is a vertical front view which shows the state which the cap part opened.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a beverage bottle 100 in which the bottle cap 10 of the present embodiment is attached to the bottle mouth portion 92 of the bottle main body 90.
FIG. 2 is a longitudinal front view showing an assembly structure of the bottle cap 10 and the beverage bottle 100 of the present embodiment.
FIG. 3 is a longitudinal front view showing a state in which the bottle cap 10 is attached to the bottle main body 90 of the present embodiment. 2 and 3, a part of the bottle body 90 is not shown.

<Outline of bottle cap>
The bottle cap 10 of the present embodiment includes an inner cylinder member 20 having a cylindrical housing portion 22 that can be opened and accommodated with a lower end 222, and a cap portion 26 that closes the upper end 221 of the housing portion 22, and an opening. The cap portion 26 is detachably threadedly attached to the upper end 33 so that the accommodating portion 22 is inserted therein, and the open lower end 34 is inserted into the bottle mouth portion 92 together with the accommodating portion 22. An outer cylindrical member 30 that has a portion 32 and is attached to the bottle mouth portion 92; and a bottom lid member 40 that includes an annular groove 41 and seals the accommodating portion 22 by being detachably fitted to the accommodating portion 22. ,have.
In the bottle cap 10, the cap portion 26 screwed to the outer cylinder portion 32 is screwed in the opening direction with respect to the outer cylinder portion 32, so that the bottom lid member 40 is pushed down by the lower end 34 of the outer cylinder portion 32. To be detached from the accommodating portion 22.
The bottle cap 10 according to the present embodiment includes a contact ring that is pressed against the upper end surface 332 of the outer cylinder part 32 in a state where the cap part 26 is screwed to the outer cylinder part 32 inside the cap part 26. 23 is formed around the housing portion 22 in a circular shape.

  The beverage bottle 100 according to the present embodiment includes a bottle body 90 in which a beverage (not shown) is accommodated and a bottle mouth portion 92 is formed at the upper end, and a bottle cap attached to the bottle mouth portion 92 of the bottle body 90 10, the cap portion 26 is screwed in the opening direction, and the bottom lid member 40 is detached from the accommodating portion 22, whereby the input 94 is mixed with the beverage.

  More specifically, the bottle cap 10 contains, for example, powdered tea as the input 94. Moreover, the bottle main body 90 consists of what is called a PET bottle, and liquids, such as fresh water, are accommodated.

  As described above, the bottle cap 10 is formed by combining the inner cylinder member 20, the outer cylinder member 30, and the bottom lid member 40.

As shown in FIGS. 2 and 3, the inner cylindrical member 20 includes a lid-shaped cap portion 26 and a cylindrical accommodating portion 22.
The cap portion 26 includes a top plate portion 261 that closes the upper end 221 of the housing portion 22 and a spiral portion 262 that is screwed into the outer cylinder portion 32.

The cap portion 26 has a holding groove 263 formed on the outer surface of the spiral portion 262, and a female screw 264 is engraved on the inner surface.
The accommodating part 22 is a cylindrical member, and the upper end 221 of the accommodating part 22 is formed integrally with the cap part 26.

The outer cylinder member 30 includes an outer cylinder part 32 and a mounting part 36.
The outer cylinder part 32 is a bottomless cylindrical member, and the upper end 33 and the lower end 34 are opened. The outer cylinder part 32 is screwed into the cap part 26 of the inner cylinder member 20 on the upper end 33 side, and the lower end 34 is inserted into the bottle mouth part 92. A male screw 331 is engraved around the upper end 33.
The mounting portion 36 is a portion that is formed in a bowl shape on the outer periphery of the outer cylinder portion 32 to form a double cylinder structure with the outer cylinder portion 32 and is screwed to the bottle mouth portion 92. On the inner surface of the mounting portion 36, a female screw 361 for screwing with the bottle mouth portion 92 is formed.

  The inner cylinder member 20, the outer cylinder member 30, and the bottle cap 10 including these are all substantially cylindrical. Hereinafter, the notation “radial direction” without limitation means the radial direction of the bottle cap 10. Similarly, the expression “axial direction” means the axial direction of the bottle cap 10, that is, the insertion direction of the housing portion 22 into the bottle mouth portion 92 and the screwing direction of the inner cylinder member 20 or the outer cylinder member 30. To do.

The inner cylinder member 20 is fastened to the outer cylinder member 30 by screwing the female screw 264 of the cap part 26 with the male screw 331 of the outer cylinder part 32 in a state where the accommodating part 22 is inserted into the outer cylinder part 32.
The lower end 222 of the housing portion 22 is inserted into the outer cylinder portion 32 of the outer cylinder member 30 from the upper end 33 toward the lower end 34.

The inside of the outer cylinder part 32 has a tapered shape that decreases in diameter from the upper end 33 toward the lower end 34, and the outer peripheral surface of the accommodating part 22 of the inner cylinder member 20 that is loosely inserted from the upper end 33 side of the outer cylinder part 32 is In the vicinity of the lower end 34, it comes into sliding contact with the inner peripheral surface of the outer cylinder portion 32.
Here, the accommodating part 22 is slightly longer than the outer cylinder part 32, and the lower end 222 of the accommodating part 22 projects downward from the lower end 34 of the outer cylinder part 32 in a state of being inserted through the outer cylinder part 32. The bottom lid member 40 is fitted into the projecting lower end 222 of the accommodating portion 22 and hermetically sealed.
In this state, the bottom cover member 40 is attached to the accommodating portion 22 by press fitting the lower end 222 of the accommodating portion 22 into the annular groove 41.
Note that the lower end 222 of the accommodating portion 22 refers to a region having a predetermined length near the opening end of the accommodating portion 22.

The bottom lid member 40 is a member that is attached to the opening of the lower end 222 of the housing portion 22 that protrudes from the outer cylinder portion 32 and seals the housing portion 22. By placing the input 94 into the accommodating portion 22 inserted through the outer cylinder portion 32, the input 94 is airtightly protected by the bottom cover member 40.
The bottom cover member 40 includes a bottom plate portion 42 that is pushed into the opening of the housing portion 22 to close the opening, an outer peripheral wall 44 that is erected on the peripheral edge of the bottom plate portion 42, and the outer peripheral wall 44 and the bottom plate portion 42. And an annular groove 41 that is press-fitted into the lower end 222 of the housing portion 22. On the outer periphery of the lower end 222, a thick portion 223 is formed as shown in FIG.

The bottom cover member 40 includes a protrusion 45 on the upper edge 46 of the outer peripheral wall 44. As shown in FIG. 3, the protrusion 45 is pressed against the lower end surface 39 of the outer cylinder member 30 in a state where the cap portion 26 is screwed to the outer cylinder member 30. It is a protruding piece that seals the gap.
The protrusion 45 is integrally formed of the same material as the outer peripheral wall 44.

  A bulging portion 47 is formed on the inner wall surface of the upper edge 46 of the outer peripheral wall 44. And if the lower end 222 of the accommodating part 22 is engage | inserted by the annular groove 41, the bulging part 47 will engage with the thick part 223, and it will prevent that the bottom cover member 40 is released from the accommodating part 22. FIG.

Further, on the inner bottom surface of the annular groove 41, an in-groove protrusion 43 that contacts the end surface 224 of the housing portion 22 and seals between the bottom cover member 40 and the housing portion 22 is made of the same material as the outer peripheral wall 44. Is integrally molded. Thereby, the input 94 accommodated in the inside of the accommodating part 22 is doubly sealed with respect to the inside of the bottle main body 90 by the protrusion part 43 and the protrusion part 45 in a groove | channel.
Further, the path of the input 94 to the outside air via the spiral portion 262 of the inner cylinder member 20 is double-sealed by the in-groove protrusion 43 and the contact ring 23.

  The inner cylinder member 20, the outer cylinder member 30, and the bottom cover member 40 are preferably made of the same kind of polymer as a base material from the viewpoint of recyclability. Specifically, the inner cylinder member 20, the outer cylinder member 30, and the bottom lid member 40 are made of a thermoplastic hard resin such as polypropylene as a main component and are manufactured by injection molding.

A male screw 96 is engraved on the outer periphery of the bottle mouth portion 92 of the bottle body 90.
The outer cylinder member 30 is attached to the bottle body 90 by winding the female screw 361 of the outer cylinder part 32 around the male screw 96 of the bottle mouth part 92.

FIG. 4 is an enlarged view of a region surrounded by a circle IV in FIG.
FIG. 4 shows a state in which the cap portion 26 of the inner cylinder member 20 is screwed into the outer cylinder portion 32 of the outer cylinder member 30 with a predetermined tightening torque.

  The contact ring 23 of the present embodiment formed inside the cap portion 26 is erected on the lower surface 265 (the lower surface in the figure) of the top plate portion 261 and has a tapered shape that narrows toward the lower end. I am doing.

The contact ring 23 is a circumferential ridge provided on the lower surface 265 of the top plate portion 261.
Although the longitudinal cross-sectional shape of the contact ring 23 cut in the axial direction of the bottle cap 10 is not particularly limited, in the case of this embodiment, it is a bell shape with a blunt end. The width center C of the longitudinal section of the contact ring 23 coincides with the axial direction.
The contact ring 23 may have a wedge shape with a sharp lower end, or may have an inverted trapezoidal shape with a flat lower end.

When the cap part 26 is screwed in the mounting direction with respect to the outer cylinder part 32, the upper end surface 332 of the outer cylinder part 32 rises relatively toward the contact ring 23 and comes into contact with the lower end of the contact ring 23.
The upper end surface 332 and the contact ring 23 in the contact state are indicated by broken lines in FIG.

When tightening torque is further applied to the cap portion 26 from the contact state, the upper end surface 332 approaches the top plate portion 261 while crushing the contact ring 23.
When the cap part 26 is screwed into the outer cylinder part 32 with a predetermined tightening torque (shown by a solid line in the figure), the contact ring 23 is in close contact with the upper end surface 332 while being compressed in the protruding height direction. is doing. The axial force resulting from the tightening torque of the cap portion 26 is concentratedly applied to the lower end (tip) of the contact ring 23 that is a ridge provided around the housing portion 22. For this reason, the lower end of the contact ring 23 is easily crushed and makes line contact with the upper end surface 332 in a circular manner.
As a result, a path (see FIG. 3) through the space between the outer cylindrical portion 32 and the housing portion 22 from the inside of the housing portion 22 to the gap between the female screw 264 and the male screw 331 is formed between the inner surface of the cap portion 26 and the outer surface. Airtightly sealed with the cylindrical portion 32.

The protrusion height of the contact ring 23 from the lower surface 265 is not particularly limited. When both the inner cylinder member 20 and the outer cylinder member 30 are made of a hard resin material whose main component is a polypropylene resin, as an example, the protruding height of the contact ring 23 from the lower surface 265 is 0.1 to 0.5 mm. It is good to do. In this case, the width dimension of the contact ring 23 on the lower surface 265 is preferably 0.2 to 0.8 mm.
The taper angle (vertical angle at the lower end) of the longitudinal section of the contact ring 23 is 15 to 160 degrees, preferably 30 to 120 degrees. By setting the taper angle to an acute angle (for example, 30 to 60 degrees), the vicinity of the lower end of the contact ring 23 pressed against the upper end surface 332 of the outer cylinder portion 32 is flexibly deformed, and the adhesion between the two is improved. Further, by setting the taper angle to an obtuse angle (for example, 90 to 160 degrees), while maintaining the circular line contact between the upper end surface 332 and the contact ring 23, the form retaining property of the contact ring 23 is improved, The sealing pressure between the inner surface of the cap part 26 and the outer cylinder part 32 is improved.

Such numerical values are dimensions before the inner cylinder member 20 is attached to the outer cylinder member 30, in other words, before the contact ring 23 is crushed by the upper end surface 332 of the outer cylinder portion 32.
In a mounting state in which the cap portion 26 of the inner cylinder member 20 is fastened to the outer cylinder portion 32 with a predetermined tightening torque, the height dimension of the contact ring 23 that is crushed by the upper end surface 332 and plastically deformed may be lower than the above. .

  The lower surface 265 of the top plate portion 261 is further formed with an inner ring 24 that is inserted into the upper end 33 of the outer cylinder portion 32 together with the housing portion 22 in a state where the cap portion 26 is screwed to the outer cylinder portion 32. Yes.

The inner ring 24 is a member that is press-fitted into the upper end 33 of the outer cylinder part 32 in a state where the cap part 26 is screwed to the outer cylinder part 32.
Thereby, a constant air density is also obtained between the outer peripheral surface of the inner ring 24 and the inner peripheral surface of the outer cylindrical portion 32.

  Both the contact ring 23 and the inner ring 24 are integrally formed of the same material as the top plate part 261 of the cap part 26.

Here, the female screw 264 of the cap part 26 in the attached state gives an axial force F to the male screw 331 of the outer cylinder part 32. The axial force F is applied to the outer tube portion 32 from the contact portion 333 between the male screw 331 and the female screw 264 inwardly in the radial direction.
Then, between the cap portion 26 and the outer cylinder portion 32 in the mounted state, the axial force F applied to the outer cylinder portion 32 is canceled by the reaction forces R1 and R2 from the inner ring 24 and the contact ring 23.
The reaction force R1 applied from the inner ring 24 to the outer cylinder portion 32 is generated in the normal direction relative to the outer peripheral surface of the inner ring 24, that is, outward in the radial direction.
Further, the reaction force R2 applied from the contact ring 23 to the outer cylinder portion 32 is generated downward in the radial direction.

FIG. 5 is a longitudinal sectional view of the inner cylinder member 20 and the outer cylinder member 30 according to a modification of the present embodiment.
In the outer cylinder member 30 of the present modification, the perpendicular direction N of the upper end surface 332 of the outer cylinder part 32 is inclined with respect to the screwing direction (vertical direction in the figure) of the cap part 26. The width center C of the longitudinal section of the contact ring 23 is inclined in a direction common to the perpendicular direction N with respect to the screwing direction.

  More specifically, in the case of this modification, the upper end surface 332 of the outer cylinder portion 32 is inclined downward inward. The perpendicular direction N of the upper end surface 332 and the width center C of the longitudinal section of the contact ring 23 are both inclined downward.

  That is, in the case of this modification, the wedge-shaped contact ring 23 tapered downward is formed so as to protrude in a skirt shape spreading from the lower surface 265 of the top plate portion 261. The upper surface 332 of the outer cylinder part 32 is inclined in the perpendicular direction N so as to be orthogonal to the protruding direction of the contact ring 23.

  By inclining the width center C of the contact ring 23 and the perpendicular direction N of the upper end surface 332 in a common direction, the outer cylindrical portion 32 that receives the axial force F from the female screw 264 moves in the protruding direction of the contact ring 23. On the other hand, the upper end surface 332 can be pressed substantially vertically.

  In particular, in the present modification, the width center C of the contact ring 23 is inclined downward together with the perpendicular direction N of the upper end surface 332 outward. With this configuration, coupled with the presence of the inner ring 24 that is erected on the inner peripheral side of the contact ring 23 and press-fitted into the outer cylinder portion 32, the direction of the reaction force R2 applied from the contact ring 23 to the outer cylinder portion 32 The direction of the width center C of the contact ring 23 can be made substantially coincident. For this reason, when the cap portion 26 is tightened, the contact ring 23 pressed against the upper end surface 332 does not bend in the radial direction of the inner cylinder member 20 (the left-right direction in FIG. 5), and in the surface perpendicular direction N of the upper end surface 332. It will be pushed straight. For this reason, favorable airtightness can be obtained between the top plate part 261 and the outer cylinder part 32.

<Opening operation of housing part>
FIG. 6 is a longitudinal sectional front view showing a state where the cap portion 26 is opened.
As shown in the figure, the beverage bottle 100 has an input that is stored in the storage portion 22 when a general consumer opens the cap portion 26 and removes the bottom cover member 40 from the storage portion 22. 94 and the liquid in the bottle main body 90 can be mixed and drunk.

  When the cap part 26 is rotated in the opening direction with respect to the male screw 331 of the outer cylinder part 32, the cap part 26 is screwed upward with respect to the outer cylinder member 30. Since the outer peripheral wall 44 of the bottom cover member 40 is locked to the lower end surface 39 of the outer cylinder member 30 and the upward movement is restricted, when the cap portion 26 is screwed by a certain length, the end surface of the housing portion 22 The engagement between the 224 and the in-groove protrusion 43 and the engagement between the lower end surface 39 of the outer cylinder member 30 and the protrusion 45 are released. For this reason, the bottom plate portion 42 of the bottom lid member 40 is dropped from the accommodating portion 22, and the input 94 accommodated in the accommodating portion 22 is thrown into the bottle body 90.

  The present invention is not limited to the above-described embodiment, and includes various modifications and improvements as long as the object of the present invention is achieved.

  For example, the contact ring 23 of the embodiment shown in FIG. 4 has the width center C in the axial direction, and the contact ring 23 of the modified example shown in FIG. 5 has the width center C inclined downward outward. It is not limited to these. That is, the contact ring 23 may be formed so as to protrude from the lower surface 265 of the top plate portion 261 so that the width center C is inclined downward inward.

  Moreover, in the said embodiment and modification, although the contact ring 23 is formed in the lower surface 265 only once, this invention is not limited to this. Two or more contact rings 23 may be formed on the lower surface 265 and pressed against the upper end surface 332 of the outer cylindrical portion 32.

  As shown in FIGS. 4 and 5, in the above-described embodiment and modification, the outer cylinder portion 32 in the mounted state has the upper end 33 held tightly between the spiral portion 262 of the cap portion 26 and the inner ring 24. However, the present invention is not limited to this. The upper end 33 of the outer cylinder part 32 may be loosely inserted into the spiral part 262 and the inner ring 24.

Moreover, in the said embodiment and modification, although the contact ring 23 is integrally molded by the same material as the cap part 26, this invention is not limited to this. The contact ring 23 may be made of a different material softer than the cap part 26 and the outer cylinder part 32, such as silicone rubber. Thereby, the adhesiveness of the contact ring 23 with respect to the upper end surface 332 of the outer cylinder part 32 can be improved.
Further, the contact ring 23 may be formed so as to protrude from the outer peripheral surface of the inner ring 24 or the inner peripheral surface of the spiral portion 262 in addition to protruding from the lower surface 265 of the cap portion 26.

DESCRIPTION OF SYMBOLS 10 Bottle cap 20 Inner cylinder member 22 Accommodating part 221 Upper end 222 Lower end 223 Thick part 224 End face 23 Contact ring 24 Inner ring 26 Cap part 261 Top plate part 262 Spiral part 263 Holding groove 264 Female screw 265 Lower face 30 Outer cylinder member 32 Outside Cylindrical portion 33 Upper end 331 Male screw 332 Upper end surface 333 Contact portion 34 Lower end 36 Mounting portion 361 Female screw 39 Lower end surface 40 Bottom cover member 41 Annular groove 42 Bottom plate portion 43 In-groove ridge 44 Outer peripheral wall 45 ridge 46 On Edge 47 Swelling portion 90 Bottle body 92 Bottle mouth portion 94 Input 96 Male screw 100 Beverage bottle C Center of width F Axial force N Surface direction

Claims (8)

An inner cylinder member having a cylindrical housing part having a lower end opened and capable of accommodating an input, and a cap part closing the upper end of the housing part;
The cap portion is detachably screwed to the open upper end, the housing portion is inserted therein, and the open lower end is inserted into the bottle mouth portion together with the housing portion. An outer cylinder member to be attached to the bottle mouth portion;
A bottom lid member that seals the accommodating portion by removably fitting the lower end of the accommodating portion;
And the cap part screwed and attached to the outer cylinder part is screwed in the opening direction with respect to the outer cylinder part, so that the bottom cover member is pushed down to the lower end of the outer cylinder part and the A bottle cap that is detached from the housing part,
Inside the cap portion, a contact ring that presses against the upper end surface of the outer cylinder portion in a state in which the cap portion is screwed to the outer cylinder portion, circulates around the housing portion. A bottle cap characterized by being formed to protrude. The cap portion is composed of a top plate portion that closes the upper end of the housing portion, and a spiral portion that is screwed into the outer cylinder portion,
2. The bottle cap according to claim 1, wherein the contact ring is erected on a lower surface of the top plate portion and has a tapered shape that becomes narrower toward a lower end. The direction perpendicular to the upper end surface of the outer cylinder portion is inclined with respect to the screwing direction of the cap portion, and
3. The bottle cap according to claim 1, wherein a width center of a longitudinal section of the contact ring is inclined in a direction common to the perpendicular direction with respect to the screwing direction.   The bottle cap according to claim 3, wherein the upper end surface is inclined downward inward, and the width direction of the vertical section of the upper end surface and the longitudinal section of the contact ring is inclined downward.   The lower surface of the top plate portion is further formed with an inner ring inserted into the upper end of the outer cylinder portion together with the housing portion in a state where the cap portion is screwed to the outer cylinder portion. The bottle cap according to claim 2.   The bottle cap according to claim 5, wherein the inner ring is press-fitted into the upper end of the outer cylinder part in a state where the cap part is screwed to the outer cylinder part.   The bottle cap according to claim 5 or 6, wherein the contact ring and the inner ring are integrally formed of the same material as the top plate portion of the cap portion. A bottle body in which a beverage is contained and a bottle mouth portion is formed at the upper end; and the bottle cap according to any one of claims 1 to 7 attached to the bottle mouth portion of the bottle body,
The beverage bottle is characterized in that the input is mixed with the beverage by screwing the cap portion in the opening direction and detaching the bottom lid member from the storage portion.

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