JPH09124065A - Easy-to-separately-disposable container-lid made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispose of a container and its lids separately, by connecting the outer lid and inner lid by means of a first hinge and connecting the inner lid and an outer cylindrical member by means of a second hinge, by breaking the second hinge, and by enabling the outer cylindrical member to be separated from the container by the operation of rotating or moving down the outer cylindrical member. SOLUTION: In this container lid 1, an outer lid 2 and an inner lid 3 are connected by means of a hinge 5, and the inner lid 3 and an outer cylindrical member 4 are connected by means of a hinge 6. To attach the container lid 1 onto a container mouth 11 by drive fit, the outer lid 2 is superimposed on the inner lid 3, then the outer cylindrical member 4 is put on the skirt 10 of the inner lid 3, thereby fitting together the three lids, inner lid 3, outer lid 2, and outer cylindrical member 4, on the same axis, and they are driven and fitted onto the mouth. In the separate disposal of used containers, the weak part of the hinge 6 is broken by rotating or pushing down the outer cylindrical member 4. And, in this state, the inner lid 3 is pulled up, thereby detaching the inner lid 3 and outer lid 2 from the container mouth 11, and then the outer cylindrical member 4 remaining on a container neck 11 is removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin container lid that is easy to separate and discard, and more specifically, to prevent breakage of a weakened portion in a capping process, and moreover, a lid container after a capping operation or after use. The present invention relates to a container lid that can be easily removed from the container.

[0002]

2. Description of the Related Art In general, a plastic cap having an opening portion and an opening tab in a container closing portion is tightly fitted and fixed to the mouth portion of the container by tapping in view of hermeticity.

On the other hand, synthetic resin container lids are often made of different materials from glass bottles, PET bottles, etc. In order to reuse resources and respond to requests for separate disposal of each material, It is desired that the contents can be easily removed from the container mouth without using a tool such as a cutter after using the contents.

In a container lid which is hermetically sealed and is easily removable, a container lid side wall portion such as a flange portion which is firmly fitted and fixed to a container mouth portion is provided with a weakened portion which is ruptured by an external force and used in the container. Later, by breaking this weakened part and releasing the container mouth from the fitted and fixed state of the container lid side wall,
The container lid can be removed from the container mouth.

For example, as shown in FIG. 5 (known example), an inner lid 30, an outer lid 31, and a hinge 32 are provided.
A container lid having a weakened portion 33 near the hinge 32 is proposed in Japanese Utility Model Laid-Open No. 5-34151. To remove the container lid from the container, the outer lid 31 to the hinge 32 are grasped. The weakened portion 33 near the hinge 32 is broken and the inner lid 30 is released.

In addition, similarly, a container lid in which a gripping piece is provided in the vicinity of the weakened portion of the side wall portion of the container lid to facilitate the breaking operation of the weakened portion is disclosed in Japanese Utility Model Laid-Open No. 4-118348 and Japanese Utility Model Publication No.
No. 32351, No. 6-32353, No. 6-42712, No. 7-846.
It is proposed in Japanese Utility Model Publication 7-11559, Japanese Utility Model Publication 7-8253, and the like.

On the other hand, as another example of a synthetic resin container lid that can be separately disposed of, as shown in FIGS. 6 (a) and 6 (b), a container lid composed of an outer lid 40 and an inner plug 41 has been proposed. (Japanese Utility Model Publication No. 7-2250). Outer lid 40 of this container lid
Is composed of a cap 42, a holding cylinder 43, and a connector 45 connecting the cap 42 and the holding cylinder 43. As shown in FIG. 6B, the container lid is attached to the mouth of the container by screwing the outer lid 40 onto the inner plug 41. Cap 4 when using container
2 is rotated to break the connector 45, the cap 42 is removed, and the contents of the container are poured out. After the container is used, the holding cylinder 43 is moved upward, and the inner plug side wall portion 44 is curved and deformed in the radially outward direction so that the inner plug can be removed.

[0008]

However, in the former container lid of which the side wall portion is broken, the side wall portion of the container lid is destroyed when the container lid is removed, so it is a glance at the container lid after use. Although it has an excellent TE (tamper evidence) property that can be identified by, the weakened portions are provided in the vertical direction, that is, in the stopper direction, and the weakened portions are broken by the pressure at the time of stoppering. There was a problem.

Further, the latter connector break type container lid also has the same drawback that the connector 45 is easily broken by an impact before or during the assembly process of the outer lid 40 and the inner plug 41, Further, in this container lid, the assembly step of the outer lid 40 and the inner stopper 41 is required as a pre-step or a post-step of the capping step due to its structure, and the capping step becomes complicated.

Therefore, the present invention eliminates the above-mentioned defects in the above-mentioned separate disposal container lid, prevents the weakened portion from being broken in the stoppering process, etc., and further removes the lid from the container after the stoppering operation or after use. An object of the present invention is to provide a separation and disposal type synthetic resin container lid that can be easily removed.

[0011]

According to the present invention, a flange portion, a portion to be opened inside the flange portion, an opening tab in the portion to be opened, and a vertical cutout provided below the flange portion are provided. A skirt portion arranged as a large number of divided pieces in the circumferential direction, and an inner lid provided with an inward protrusion arranged on the inner circumference of the skirt portion and engaging with the outer peripheral ring of the container mouth, and the upper outer circumference of the flange portion. An outer lid that is openable and closable with respect to the flange portion via a first hinge, and an outer cylinder that is provided via a rupturable second hinge on the lower outer periphery of the flange portion and that engages with the outer periphery of the skirt portion. There is provided a synthetic resin container lid which is composed of a member and is easy to separate and discard.

[0012] In this container lid, it is preferable that the lower end of the flange portion of the inner lid is connected to the skirt portion with an outer peripheral side step portion that can engage with the upper end of the outer tubular member. It is preferable that the notch provided in the skirt portion extends a small distance above the lower end of the flange portion and on the inner peripheral side.

In the synthetic resin container lid, it is preferable that a convex portion or a concave portion for rotating or pushing down the outer tubular member is formed on at least a part of the outer periphery of the outer tubular member.

The synthetic resin container lid has a first hinge-
The angle between the inner lid and the second hinge may be arbitrary, but it is preferable that the angle is substantially right.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The synthetic resin container lid of the present invention roughly comprises three members, an inner lid, an outer lid and an outer cylinder member. The inner lid and the outer cylinder member are connected to each other via a second hinge.

The inner lid is composed of a flange portion, a portion to be opened inside the flange portion, an opening tab in the portion to be opened, a skirt portion provided below the flange portion, and an inward projection on the inner circumference of the skirt portion. There is.

The outer lid is provided so as to be openable and closable with respect to the flange portion via a first hinge on the outer periphery of the upper portion of the flange portion.

In the container lid of the present invention, the skirt portion is arranged in the circumferential direction as a large number of divided pieces through the notches in the vertical direction, and the outer cylinder member is a breakable first outer peripheral portion of the flange portion. It is a remarkable feature that it is provided so as to engage with the outer circumference of the skirt through the second hinge.

First, in this container lid, since the inner lid, the outer lid and the outer cylinder member are connected via the first and second hinges, they can be integrally formed by injection molding or compression molding.

When the container lid is capped at the mouth of the container, the outer lid is overlaid on the inner lid, the outer cylinder member is covered on the skirt portion of the inner lid, and the inner lid, the outer lid and the outer cylinder member are provided. It is assumed that the three members are coaxially assembled.

In this state, the container lid is plugged into the container mouth. In the inner lid of the present invention, since the skirt portion is provided as a large number of divided pieces through the vertical cutouts, when the inward protrusion of the inner circumference of the skirt passes downward through the outer peripheral ring of the container mouth, It easily spreads outward, and at the position where this inward projection passes through the outer ring, it is securely engaged with the outer ring by the inward repulsive force of the split piece. Thus,
Not only the tapping operation is performed smoothly, but also reliable sealing is possible.

Further, in the container lid of the present invention, no weakening portion is provided on the inner lid or the outer tubular member, and the weakening portion is provided only on the second hinge connecting the inner lid and the outer tubular member. In addition, since the weakened portion of this second hinge is located outside the inner lid, the pressure at the time of stoppering does not directly act on the weakened portion, and the weakened portion at the time of stoppering is not destroyed. It can be effectively prevented. Further, if the weakened portion of the second hinge is provided long in the circumferential direction instead of in the stopper direction, the weakened portion is more effectively prevented from being broken.

When the used container is sorted and discarded, the outer cylinder member is rotated or pushed down to break the breakable portion of the second hinge, that is, the weakened portion, and the outer cylinder member is pushed down to It is possible to release the engagement state with the skirt portion of the lid. When the skirt of the inner lid is pulled up in this state, when the inward projection on the inner circumference of the skirt passes upwards on the outer peripheral ring of the container mouth, the split piece easily spreads outward in the radial direction, and the inward projection extends outward. The inner lid and the outer lid are easily removed from the container opening through the ring. With the inner lid and outer lid removed, the outer tubular member remaining on the neck of the container can be easily taken out of the mouth of the container. Thus, in the container lid of the present invention, the lid can be easily removed from the container after use.

In the present invention, it is particularly preferable that the lower end of the flange portion of the inner lid is connected to the skirt portion with an outer peripheral step portion that can engage with the upper end of the outer tubular member. That is, in the above structure, the position of the outer cylinder member is restricted by the outer peripheral side step portion and the skirt portion, so that the outer cylinder member is prevented from being displaced and the outer cylinder member from rotating during the tapping operation. be able to.

Further, in the container lid of the present invention, it is particularly preferable that the notch provided in the skirt portion of the inner lid extends above the lower end of the flange portion and at the inner peripheral side by a small distance. That is, the notch in the vertical direction allows the split piece serving as the skirt portion to be flexibly deformed in the radially outward direction and the radially inward direction,
It also allows a slight deformation in the circumferential direction,
By extending this notch above the lower end of the flange part and by a small distance to the inner peripheral side, further flexibility and flexibility is imparted to the divided piece, and tapping operation and removal operation from the container mouth part are performed. It will be easier.

Further, it is preferable that at least a part of the outer circumference of the outer tubular member is provided with a convex portion or a concave portion for rotating or pushing down the outer tubular member which engages with the fingertip. It is preferable for facilitating the breaking of the hinge and for facilitating the detachment from the inner lid skirt portion of the outer tubular member.

The synthetic resin container lid has a first hinge-
The angle between the inner lid and the second hinge may be arbitrary, but it is preferable that the angle is substantially right. This is because it is customary to provide the pouring port of the container lid on the opposite side of the first hinge (at a position of about 180 degrees), and providing the second hinge at this position is an aesthetic effect of the container lid. This is also not preferable from the point of view of the above, and also from the point of causing finger stains due to dripping or the like during removal.

In the synthetic resin container lid of the present invention, the inner lid and the outer cylinder member are completely separated after being removed from the container. Therefore, it can be recognized at a glance that it is a used container lid, and the TE property is also excellent.

The second hinge is usually designed to be rupturable by an external force. For example, the thickness of the hinge may be thinner than that of the first hinge, or the hinge may be perforated.

In the container lid of the present invention, the outer lid, the inner lid and the outer tubular member are integrally manufactured by injection molding, compression molding or the like.
At this time, a vertical cutout may be simultaneously formed in the skirt portion of the inner lid. In addition, after molding the container lid as a primary molded product in which the outer lid, the inner lid, and the outer tubular member are integrated,
Then, the skirt portion of the inner lid of the primary molded product may be manufactured by providing a vertical notch with a cutter or the like.

As the resin used for molding, various plastics such as low-, medium- or high-density polyethylene,
Examples thereof include linear low density polyethylene, polypropylene, thermoplastic polyester, polyamide, styrene resin, ABS resin and the like.

The container lid of the present invention can be modified in various ways. For example, in order to further improve the hermeticity of the container, a conventionally known liner made of an olefin resin, vinyl chloride plastisol, or the like may be provided on the inner surface of the outer lid or the inner surface of the flange portion of the inner lid.

[0033]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of the container lid of the present embodiment, which is attached to the container mouth and the outer lid is closed, and FIG. 2 is a container lid of the present embodiment before being attached to the container mouth. Is a three-sided view of
FIG. 3 is a perspective view of the container lid of the present embodiment in an assembled state or a state in which the container lid is attached to the container mouth. FIG. 4 is a sectional view of the container lid of the present embodiment with the second hinge portion broken to show the outer cylinder member. It is a perspective view of the state which moved to the downward direction.

1 to 3, the container lid 1 has a substantially cylindrical shape according to the shape of the container mouth, and is composed of an outer lid 2, an inner lid 3 and an outer tubular member 4, and the outer lid 2 and the inner lid 2 The lid 3 is connected to the first hinge 5, and the inner lid 3 and the outer cylinder member 4 are connected to each other by a rupturable second hinge 6.
In this example, the outer lid 2 and the outer cylinder member 4 are provided in a positional relationship of being perpendicular to each other with respect to the inner lid 3.

The inner lid 3 is divided into a large number of parts through a flange portion 7, a planned opening portion 8 inside the flange portion, an opening tab 9 in the planned opening portion, and a vertical cutout 16 provided below the flange portion. A skirt portion 10 arranged as a piece in the circumferential direction, and an inward projection 1 arranged on the inner circumference of the skirt portion 10 and firmly adhered to an outer peripheral ring 12 of a container mouth portion 11.
3 is provided. The skirt portion 10 is divided by a notch 16 into a plurality of divided pieces (skirt pieces) 17.

More specifically, inside the flange portion 7,
An inner cylinder 20 that is smaller in diameter than the skirt portion 10 and that engages with the inner peripheral surface of the container mouth portion 11 is provided, and a portion surrounded by the flange portion 7, the skirt portion 10 and the inner cylinder 20 accommodates the container mouth portion. It is a space 21. A score 22 is formed inside the inner cylinder 20, and the score 22 defines the planned opening portion 8. Further, a cylindrical spout 23 is formed above the outside of the planned opening portion 8.

The outer lid 2 is provided to be openable and closable with respect to the flange portion 7 via a first hinge 5 on the outer periphery of the upper portion of the flange portion 7. The outer lid 2 includes a top plate portion 24 and a skirt portion 25.
And a cylindrical projection 26 having a small height is formed on the inner surface side of the top plate portion 24, and when the outer lid 2 is closed with respect to the inner lid 3, the cylindrical projection 26 serves as the spout 23. It can be engaged and locked. The outer diameter of the skirt portion 25 of the outer lid 2 is substantially equal to the outer diameter of the flange portion 7 of the inner lid 3, and its height must be sufficient to accommodate the opening tab of the inner lid 3 and the like. On the lower portion of the skirt portion 25 of the outer lid 2, there is provided a convex portion 14 that serves as a clue for opening and closing the outer lid.

FIG. 1 shows a cross section passing through the notch 16, in which the lower end of the flange portion 7 of the inner lid 3 is provided with a skirt portion through an outer peripheral step portion 19 capable of engaging with the upper end of the outer tubular member 4. Connected to 10. That is, the outer diameter of the skirt portion 10 is smaller than the outer diameter of the flange portion 7, while the inner diameter of the outer tubular member 4 is larger than the inner diameter of the skirt portion 10 and smaller than the outer diameter of the flange portion 7. . As a result, the position of the outer cylinder member 4 is regulated by the outer peripheral side step portion 19 and the skirt portion 10, and it is possible to prevent the outer cylinder member from being displaced and the outer cylinder member from rotating during the tapping operation. You can

Further, as shown in FIGS. 1 and 2, the notch 16 provided in the skirt portion 10 of the inner lid 3 extends above the lower end of the flange portion and at the inner peripheral side by a small distance, and the notch extension portion 18 is provided. Is formed. Vertical cutout 16
Allows the split piece 17 serving as the skirt portion to be flexibly deformed in the radially outward direction and the radially inward direction, and further allows a slight deformation in the circumferential direction. By forming the extension portion 18 by extending a small distance above and on the inner peripheral side, the divided piece 17 is provided with further flexibility and flexibility, and the tapping operation and the removal from the container mouth portion are performed. The operation becomes easier.

The outer cylinder member 4 is provided on the outer periphery of the lower portion of the flange portion 7 via a rupturable second hinge 6. On the outer periphery of the upper portion of the outer cylinder member 4, a convex portion 15 is provided, which serves as a clue for the operation of breaking the second hinge. The outer diameter of the outer cylinder member 4 is substantially equal to the outer diameter of the flange portion 7 of the inner lid 3, and the height of the outer cylinder member 4 is preferably substantially equal to the height of the skirt portion 10.

The width of the notches 16, the number of the notches and the thickness of the divided pieces are determined from the viewpoints of sealing property, plugging workability and easy removal, but the notch width is 0.5 to 3 mm, particularly 1.0. To 2.0 mm, the width of the segment (arc length) is 3 to 15 mm, especially 5 to 10 m.
m is preferable. Furthermore, the thickness of the divided pieces is 0.5.
It is desirable that the distance is from 2.5 mm to 2.5 mm, particularly from 1.0 mm to 1.5 mm.

The thickness of the outer cylinder member 4 in the radial direction is preferably 0.5 to 2.5 mm, particularly preferably 0.7 to 1.5 mm in consideration of the impact at the time of tapping.

In this container lid, the weakened portion 27 has the second hinge 6 unlike the conventional synthetic resin container lid which can be separated and discarded.
Since it is provided in the container, damage to the container lid due to tapping can be prevented. It is preferable that the second hinge has a substantially rectangular shape that is wide in the horizontal direction from the viewpoint of the strength against the impact at the time of stoppering. The thickness of the weakened portion 27 in the second hinge is
Usually 0.05 to 0.3 mm, especially 0.1 to 0.2
The thickness of mm is preferable for facilitating removal while preventing accidental breakage.

As shown in FIG. 2, the container lid 1 is expanded while the inner lid 3, the outer lid 2 and the outer tubular member 4 are connected via the first hinge 5 and the second hinge 6. In this state, it is integrally molded by injection molding or compression molding.

When the container lid 1 is plugged into the container mouth 11, the outer lid 2 is placed on the inner lid 3 and the outer cylinder member 4 is placed on the skirt portion 10 of the inner lid 3, as shown in FIG. The inner lid 3, the outer lid 2, and the outer tubular member 4 are coaxially assembled.

In this state, the container lid assembly 1 is attached to the container mouth 1.
Plug in 1. In the inner lid 3, the skirt portion 10 is provided as a large number of divided pieces 17 through the vertical cutouts 16, so that the inward protrusions 13 on the inner circumference of the skirt portion pass downward through the outer peripheral ring 12 of the container mouth portion 11. When this is done, it easily spreads outward in the radial direction, and the inward projections 13 form the outer ring 12.
At the position after passing through, the inward repulsive force of the split piece 17 securely engages the lower portion of the outer peripheral ring 13 (see FIG. 1). Thus, not only the tapping operation can be performed smoothly, but also reliable sealing is possible.

In this container lid 1, the inner lid 3 and the outer tubular member 4 are not provided with any weakened portions, and the inner lid 3 and the outer tubular member 4 are not provided.
Since the weakened portion 27 is provided only on the second hinge 6 connecting the and, and the weakened portion 27 of the second hinge 6 is located outside the inner lid 3, the weakened portion is further formed. Since it is provided long in the circumferential direction, not in the stoppering direction, the pressure at the time of stoppering does not directly act on the weakened portion 27, and the weakening portion at the time of stoppering can be effectively prevented from breaking.

When the used container is sorted and discarded, a finger is placed on the convex portion 15 of the outer tubular member 4 to rotate or push the outer tubular member 4 downward, whereby the second hinge 6 is released.
It becomes possible to release the weakened portion 27 of the inner cover 3 and push down the outer cylinder member 4 to release the engagement state of the inner lid 3 with the skirt portion 10. When the inner lid 3 is pulled up in this state, when the inward projection 13 on the inner circumference of the skirt passes upward through the outer peripheral ring 12 of the container mouth, the split piece 17 easily spreads radially outward, and the inward projection 13 Passes through the outer ring 12,
The inner lid 3 and the outer lid 2 can be easily removed from the container opening 11. With the inner lid 3 and the outer lid 2 removed, the outer tubular member 4 remaining on the container neck 11 can be easily taken out of the container mouth.

The removed container lid is separated into two members, the inner lid 3 and the outer lid 2 and the outer cylinder member 4, and at first glance it is possible to identify the container lid after use. It is also possible and has excellent TE property.

[0051]

According to the present invention, the outer lid, the inner lid and the outer tubular member are constituted by the first hinge portion for the outer lid and the inner lid and the second hinge portion for the inner lid and the outer tubular member. A connected synthetic resin container lid, which is separated from the container by a very simple operation of breaking the second hinge part connecting the inner lid and the outer cylinder member and rotating or moving the outer cylinder member downward. However, there is provided a synthetic resin container lid that can be separated and discarded from the container. In the synthetic resin container lid of the present invention, no weakened portion is provided on the inner lid or the outer tubular member, and only the second hinge connecting the inner lid and the outer tubular member is provided with the weakened portion. At the same time, since the weakened portion of this second hinge is located outside the inner lid, the pressure at the time of stoppering does not directly act on the weakened portion, and the destruction of the weakened portion at the time of stoppering is effective. It can be prevented. Therefore, defective products are less likely to occur and the productivity is high. Also, in this container lid, since the skirt portion that engages with the container mouth is provided as a large number of divided pieces through the vertical notches, not only the tapping operation is performed smoothly, but also a reliable sealing is performed. Is also possible. Further, after the container lid is removed from the container, the outer lid and the inner lid and the outer tubular member are completely separated. Therefore, since the container lid before and after use can be identified at a glance, this container lid is also excellent in TE property. Further, in this container lid, the outer lid, the inner lid, and the outer cylinder member are connected by the hinge portion, and since they are integrated as a whole, compared with a container lid in which a plurality of members are individually separated. Also, the labor of assembling work is saved and workability is good.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a container lid of the present embodiment, which is attached to a container mouth and an outer lid is closed.

FIG. 2 is a three-sided view of the container lid of this embodiment before being attached to the container mouth.

FIG. 3 is a perspective view of the container lid of the present embodiment in an assembled state or a state in which the container lid is attached to the container mouth.

FIG. 4 is a perspective view showing a state where the second hinge of the container lid of this embodiment is broken and the outer peripheral member is moved downward.

FIG. 5 is a perspective view showing an example of a conventional synthetic resin container lid that can be separated and discarded.

FIG. 6 is a view showing another example of a conventional synthetic resin container lid that can be separated and discarded.

[Explanation of symbols]

 1 Container Lid 2 Outer Lid 3 Inner Lid 4 Outer Cylinder Member 5 First Hinge 6 Second Hinge 7 Flange Part 8 Flange Inner Opening Planned Area 9 Inner Opening Tab 10 Skirt Part 11 Container Portion 12 Outer peripheral ring 13 Inward protrusion that engages with outer peripheral ring 14 Convex portion of outer lid 15 Convex portion of outer cylinder member 16 Notch 17 Skirt piece 18 Inner notch at lower flange portion 19 Step portion 20 Medium cylinder 21 Container mouth portion Storage space 22 Score 23 Spout 24 Top plate portion 25 Skirt portion 26 Cylindrical protrusion 27 Weakened portion 30 Inner lid 31 Outer lid 32 Hinge 33 Weakened portion 40 Outer lid 41 Inner stopper 42 Cap 43 Holding tube 44 Inner stopper side wall portion 45 Connection Child

Claims (5)

[Claims] 1. A flange portion, a portion to be opened inside the flange portion, a tab for opening in the portion to be opened, a flange provided below the flange portion, and arranged in the circumferential direction as a large number of divided pieces through vertical cutouts. A skirt portion, and an inner lid provided on the inner periphery of the skirt portion and having an inward projection that engages with the outer peripheral ring of the container mouth portion, and the flange portion via the first hinge on the upper outer periphery of the flange portion. And an outer cylinder member that is openable and closable with respect to the outer peripheral surface of the flange portion, and an outer cylinder member that is provided via a rupturable second hinge on the outer periphery of the lower portion of the flange portion and that engages with the outer periphery of the skirt portion. Synthetic resin container lid for easy disposal. 2. The container lid according to claim 1, wherein the lower end of the flange portion of the inner lid is connected to the skirt portion with an outer peripheral side step portion that can engage with the upper end of the outer tubular member. 3. The container lid according to claim 1 or 2, wherein the notch provided in the skirt portion of the inner lid extends above the lower end of the flange portion and at the inner peripheral side by a small distance. 4. The container lid according to claim 1, wherein a convex portion or a concave portion for rotating or pushing down the outer cylinder member is formed on at least a part of the outer circumference of the outer cylinder member. 5. The container lid according to claim 1, wherein an angle formed by the first hinge, the inner lid and the second hinge is substantially a right angle.