JP5984636B2 - Container lid composed of inner stopper and lid body - Google Patents

Description

  The present invention relates to a container lid composed of a synthetic resin inner stopper attached to the mouth and neck of the container and a synthetic resin lid main body attached to the inner stopper.

Patent Document 1 below discloses a container lid that is composed of a synthetic resin inner stopper attached to the mouth and neck of the container and a synthetic resin lid main body attached to the inner stopper. The inner plug includes a circular obstruction wall and a cylindrical attachment wall connected to the outer peripheral edge of the obstruction wall, and is attached to the mouth and neck of the container by fitting the attachment wall to the outer peripheral surface of the mouth and neck of the container. The obstruction wall occludes the mouth and neck of the container. The lid body includes a circular cover wall and a fitting wall connected to the outer peripheral surface of the cover wall, and female threads formed on the inner peripheral surface of the fitting wall are formed on the outer peripheral surface of the inner plug mounting wall. It is attached to the inner plug by being screwed into the male thread, and the covering wall is located above the closing wall of the inner plug. A breakable thin line that defines a ball-shaped removal area is formed on the closing wall of the inner plug, and a key-like locked piece that extends upward from the removal area is formed. On the lower surface of the cover wall of the lid body, a key-like locking piece that is locked to the locking piece of the inner plug is formed. When the lid body is attached to the inner plug as required, when the lid body is rotated counterclockwise (in the direction to remove the lid body from the inner plug) when viewed from above, the lid body force removal region of the inner plug is applied via the engaging piece of the engaging pieces and the inside plug is broken frangible thin line removed region is removed from the closing wall, the closing wall it's thereto A passage opening is generated.

JP 2005-59933 A

  The above-described container lid disclosed in Patent Document 1 simply rotates the lid body with respect to the inner plug without causing a sanitary problem by bringing a finger into contact with the closing wall of the inner plug. Thus, the breakable thin line formed on the closed wall of the inner plug can be broken to remove the removal region from the closed wall, thereby generating a passage opening. However, it is still not fully satisfactory, and the removal region is separated from the closed wall to become so-called waste pieces, and such waste pieces enter the container, or the complicated process of taking out and discarding the waste pieces is performed. It is necessary to carry out. Further, there is a possibility that the breakable thin line cannot be broken as required because the locking of the locking piece and the locked piece is not always sufficient.

  The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is a new and improved container capable of generating a passage opening in the closed wall of the inner plug without generating so-called scrap pieces. To provide a lid.

  Another technical problem of the present invention is to provide a new and improved container lid capable of sufficiently breaking a breakable thin-wall line as required, in addition to solving the above-mentioned main technical problems. is there.

  According to the present invention, the main technical problem is achieved by making the breakable thin line formed on the closed wall of the inner plug into a unique shape.

That is, according to the present invention, as a container lid capable of achieving the main technical problem, a synthetic resin inner plug attached to the mouth and neck of the container and a synthetic resin lid main body attached to the inner plug And consists of
The inner plug includes a circular blocking wall and a cylindrical mounting wall connected to the outer peripheral edge of the blocking wall, and is fitted to the mouth and neck of the container by fitting the mounting wall to the outer peripheral surface of the mouth and neck of the container The occlusion wall occludes the mouth and neck of the container;
The lid body includes a circular covering wall and a cylindrical fitting wall connected to the outer peripheral edge of the covering wall, and the inner plug is fitted to the outer peripheral surface of the mounting wall of the inner plug. The cover wall is located above the blocking wall of the inner plug,
At least one breakable thin line is formed on the closing wall of the inner plug, and the breakable thin line includes an outer arcuate portion extending from the break start end and an inner arcuate portion extending from the break start end. have, arc-shaped deformed region is defined between the outer arc-shaped portion and the inner arcuate portion,
Locked means is disposed on the upper surface near the break start end in the deformation region,
At least one discharge opening is formed in the cover wall of the lid body. When the lid body is attached to the inner plug on the lower surface of the cover wall, the cover body is locked to the locked means. A locking means is provided,
When the lid body is rotated in a predetermined direction with respect to the inner plug while the lid body is mounted on the inner plug, a force is applied to the deformation region via the locking means and the locked means. The breakable thin line of the inner plug is broken and the deformation region is deformed, thereby creating a passage opening in the closure wall of the inner plug;
A container lid is provided.

  The other technical problem is that the locking means of the inner plug includes a column extending upward from the deformation region and a ring attached to the column, and the locking means of the lid body is covered with the cover. This is accomplished by constructing a hook-shaped piece depending from the wall.

Preferably, two to three breakable thin lines are formed at equal intervals in the circumferential direction on the closing wall of the inner plug, and the two or three deformation regions are spaced at equal intervals in the circumferential direction. It is specified individually. At least one positioning groove is formed on one of the outer peripheral surface of the mounting wall of the inner plug and the inner peripheral surface of the fitting wall of the lid body, and at least one positioning protrusion is formed on the other. By inserting the positioning projection into the positioning groove and mounting the lid body on the inner plug, the relative angular position of the lid body with respect to the inner plug is regulated, and the inner plug Each of the locking means of the lid body is preferably locked to each of the locked means. The outer arc-shaped portion and the inner arc-shaped portion of the breakable thin line formed on the closing wall of the inner plug extend from the break starting end in a counterclockwise direction when viewed from above, and the predetermined direction is upward. The counterclockwise direction is advantageous when viewed from the side. The outer peripheral surface of the mounting wall of the inner plug and the inner peripheral surface of the fitting wall of the lid body cooperate with each other so that the lid body is opposite to the predetermined direction with respect to the inner plug. A rotation preventing means for preventing rotation in a direction is formed, and a rotation limiting means for limiting the rotation of the lid body in the predetermined direction relative to the inner plug to a predetermined angle is formed, and When the lid body is rotated relative to the inner plug in the predetermined direction until it is limited by the rotation restricting means, the lid body rotates relative to the inner plug in the direction opposite to the predetermined direction. It is preferable that reverse blocking means for blocking is formed. Preferably, the deformation region defined in the closing wall of the inner plug is inclined downward from the break starting end toward the breaking direction of the breakable thin line.

  In the container lid of the present invention, the inner plug is closed by simply rotating the lid body in a predetermined direction with respect to the inner plug without causing a sanitary problem by bringing a finger into contact with the closing wall of the inner plug. In addition to being able to create a passage opening in the wall, the passage opening of the inner plug is created by deforming the deformation area (without separating it from the closure wall), so that so-called debris is not generated. When the locking means of the inner plug is composed of a column extending upward from the deformation area and a ring attached to the column, and the locking means of the lid body is composed of a hook-shaped piece hanging from the cover wall, the ring The interlocking of the hook-shaped pieces is sufficiently strong, and there is virtually no risk of the interlocking being damaged, and the breakable thin line is sufficiently reliably broken.

FIG. 3 is a cross-sectional view of the inner stopper in a preferred embodiment of a container lid constructed in accordance with the present invention along line AA in FIG. The top view of the inner stopper shown in FIG. The front view of the inner stopper shown in FIG. Sectional drawing of the lid body in the preferred embodiment of the container lid comprised according to this invention. The bottom view of the lid body shown in FIG. Sectional drawing of the state attached to the container in the state which combined the internal stopper comprised according to this invention, and the lid | cover main body. The front view of the state with which the container was mounted | worn in the state which combined the internal stopper comprised according to this invention and the lid | cover main body. The front view shown in the state which attached to the container in the state which combined the internal stopper and lid main body which were comprised according to this invention, and rotated about 180 degree | times to the opening direction with respect to the internal stopper. Sectional drawing shown in the state which attached to the container in the state which combined the internal stopper and cover main body comprised according to this invention, and rotated the cover main body about 180 degree | times with respect to the internal stopper. Shown in a state where the inner cap and the lid main body constructed according to the present invention are combined and attached to the container, the lid main body is rotated about 180 degrees in the opening direction with respect to the inner plug, and the outer lid is rotated and opened. Front view. Sectional drawing of other embodiment of the inner stopper in the container lid of this invention. FIG. 12 is a cross-sectional view showing the container lid of the present invention provided with the inner plug shown in FIG. 11 attached to the container in a state where the inner plug and the lid main body are combined, and the lid main body rotated approximately 180 degrees in the opening direction.

  The invention will be described in more detail below with reference to the accompanying drawings, in which embodiments of the invention are shown.

  A container lid constructed in accordance with the present invention comprises an inner stopper 4 shown in FIGS. 1 to 3 and a lid body 6 shown in FIGS. 4 and 5, both of which are made of polyethylene or polypropylene. It is integrally formed from a synthetic resin.

Referring to FIGS. 1 to 3, the inner plug 4 includes a blocking wall 8 and a cylindrical mounting wall 10. Although the outer peripheral edge of the blocking wall 8 is inclined radially outward and upward, it extends horizontally as a whole, and a cylindrical seal that extends downward on the lower surface of the outer peripheral edge of the blocking wall 8. A wall 12 is formed. The inner peripheral surface of the mounting wall 10 is connected to the outer peripheral edge of the blocking wall 8 at a substantially intermediate portion in the axial direction. At the upper end of the outer peripheral surface of the mounting wall 10 is formed an annular locking ridge 14 projecting radially outward to engage with an annular locked ridge formed on the fitting wall of the lid body 6 described later. An annular locking ridge 16 is formed at the lower end of the inner peripheral surface of the wall 10 and protrudes inward in the radial direction to engage with a locking jaw portion of a container mouth neck portion described later. As shown in FIG. 3, it is preferable that at least one positioning groove 18 is formed on the outer peripheral surface of the mounting wall 10 to cooperate with a positioning protrusion formed on the fitting wall described later. In the illustrated embodiment, four positioning grooves 18 are formed in the locking protrusion 14 at intervals. On the outer peripheral surface of the mounting wall 10, the lid body 6 rotates clockwise as viewed from above with respect to the inner plug 4 by cooperating with a protrusion formed on the fitting wall described later. Rotation preventing means for blocking, rotation restricting means for restricting rotation in the counterclockwise direction when viewed from above the lid main body 6 with respect to the inner plug 4, and lid body 6 clockwise with respect to the inner plug 4 It is preferable that reverse rotation preventing means for preventing the lid body 6 from rotating clockwise with respect to the inner plug 4 when viewed from above is formed. is there. In the illustrated embodiment, as clearly shown in FIGS. 2 and 3, one rectangular protrusion 26 projecting radially outward as a rotation preventing means and projecting radially outward as a rotation restricting means. One rectangular protrusion 28 and two ratchet claws 30 protruding outward in the radial direction are formed as reverse rotation preventing means. The protruding portion 26 and the protruding portion 28 are formed at a substantially intermediate portion in the axial direction of the mounting wall 10 at a position substantially opposite to the diameter direction. The two ratchet claws 30 are sharply cut outward in the radial direction at a position opposite to each other in the diametrical direction, which is a substantially intermediate portion in the axial direction of the mounting wall 10, slightly below the protruding portions 26 and 28. 2 is formed facing the counterclockwise direction. Further, the lower end portion of the outer peripheral surface of the mounting wall 10 is made relatively thick, and an annular gap 32 and a knob 34 are formed. Such a configuration of the lower end portion of the mounting wall 10 is for making it possible to easily remove the inner stopper from the container mouth portion when separating and discarding the container lid , and has a well-known shape in itself. For details, refer to, for example, JP-A-10-59400 and JP-A-2004-83092.

Referring to FIG. 2 together with FIG. 1, it is important that at least one breakable thin line 36 is formed in the closing wall 8 . In the illustrated embodiment, two thin-walled lines 36 are formed and are positioned point-symmetrically with respect to the center of the blocking wall 8. The thin-walled line 36 includes an outer arcuate portion 38 extending counterclockwise from a semicircular fracture starting end portion 37 having a relatively small radius of curvature and spaced from the center of the blocking wall 8 by a predetermined distance radially outward. And an inner arc portion 40 that is radially inward of the outer arc portion 38 and extends counterclockwise from the fracture start end portion 37. More specifically, in the illustrated embodiment, the outer arc 38 is generally arcuate from the radially outer end of the break start end 37 and the inner arc 40 is from the radially inner end of the break start end 37. extending in an arc shape after extending a predetermined distance in a straight line, an overall and to arc shape. An arcuate deformation region 42 is defined between the outer arcuate part 38 and the inner arcuate part 40. Furthermore, it is important that a locking means 44 to be locked with a locking means formed on the cover wall of the lid body 6 described later is disposed on the upper surface of the deformation region 42 in the vicinity of the break start end portion 37. It is. In the illustrated embodiment, the locked means 44 is composed of a column 46 and a ring 48. The support column 46 is located slightly on the counterclockwise side of the break start end portion 37 in the clockwise direction in FIG. 2 and has a substantially rectangular cross-sectional shape. The ring 48 has a substantially oval shape in plan view, and is attached to the upper end of the column 46 radially outward. The outer peripheral surface of the ring 48 is gradually inclined downward.

  Referring to FIGS. 4 and 5, the lid body 6 includes a circular covering wall 50 and a cylindrical fitting wall 52 that is suspended from the outer peripheral edge of the covering wall 50. A cylindrical seal wall 58 that is in close contact with the inner peripheral surface of the mounting wall 10 in a state where the inner plug 4 and the lid main body 6 are combined is formed on the peripheral surface of the lower surface of the cover wall 50 in a suspended manner. A relatively low cylindrical locking wall 60 that extends upward, and a higher height than the locking wall 60 inward in the radial direction of the locking wall 60, are provided at the peripheral edge of the upper surface of the cover wall 50. A cylindrical pouring wall 62 is formed. The center positions of the seal wall 58, the locking wall 60, and the pouring wall 62 are all the same as the center position of the cover wall 50. At the upper end of the locking wall 60, an annular locking ridge 64 protruding outward in the radial direction is formed, which is engaged with a locked groove formed in the outer lid described later. The right side in FIG. 4 of the pouring wall 62 has a lower extension height from the cover wall 50 than the left side in FIG. 4, and the upper end of the pouring wall 62 is inclined radially outward and upward. It has been. On the other hand, the left side of the pouring wall 62 in FIG. 4 has a lip shape in which the upper end of the pouring wall 62 is curved outward in the radial direction. Two saddle-shaped discharge openings 66 are formed in the central region of the cover wall 50, and each of the straight openings of the discharge openings 66 is positioned symmetrically with a slight gap so as to be parallel to the hinge means described later. I'm hurt. As clearly understood from FIGS. 4 and 5, the fitting wall 52 has an upper end portion and a lower end portion in FIG. 5 (from the hinge means described later, approximately 90 degrees counterclockwise and clockwise in FIG. 5, respectively). Are formed in a substantially rectangular notch 68 at each angular interval). In the illustrated embodiment, in the axially substantially intermediate portion on the inner peripheral surface of the fitting wall 52, a plurality of engagement with the locking protrusion 14 of the inner plug 4 when the inner plug 4 and the lid body 6 are combined. Each has four wide locked ridges 70a and narrow locked ridges 70b. Further, it is preferable that at least one positioning projection 72 that cooperates with the positioning groove 18 formed in the mounting wall 10 is formed on the inner peripheral surface of the fitting wall 52. In the illustrated embodiment, the four positioning protrusions 72 are at intermediate positions in the circumferential direction between the adjacent locked protrusions 70a and the locked protrusions 70b, and are adjacent to the locked protrusions 70a and 70a. It is formed at a slightly lower position in the axial direction of the locked protrusion 70b. If desired, positioning grooves may be formed on the outer peripheral surface of the fitting wall 52 and positioning protrusions may be formed on the mounting wall 10. It is preferable that rotation preventing means, rotation restricting means, and reverse rotation preventing means are formed on the inner peripheral surface of the fitting wall 52. In the illustrated embodiment, the rotation prevention means, the rotation restriction means, and the reverse rotation prevention means are a rectangular protrusion 74 protruding radially inward, and the protrusion 74 is slightly clockwise relative to the vicinity of the left end in FIG. Thus, it is positioned slightly below the positioning protrusion 72.

  4 and 5, the description will be continued with reference to FIG. 4 and FIG. It is important that the is disposed. In the illustrated embodiment, the locking means 86 is composed of two hook-shaped pieces 88 depending from the covering wall 50. The hook-shaped piece 88 is radially outward from the discharge opening 66 and its center is positioned in the same straight line connecting the center of the notch 68 and the center of the cover wall 50 in FIG. Further, the hook-shaped piece 88 is positioned so that the tip end of the hook faces in the clockwise direction in FIG. .

  The outer lid 56 connected via the hinge means 54 at the upper end of the fitting wall 52 is suspended from a substantially circular top wall 76 whose center part is slightly expanded (downward in FIG. 4) and the outer peripheral edge of the top wall 76. A cylindrical skirt wall 78. A substantially cylindrical sealing wall 80 is formed at the center of the inner surface of the top wall 76, and the extending length of the sealing wall 80 is gradually shortened as the distance from the portion adjacent to the hinge means 54 increases. Further, a flange 82 protruding radially outward is formed at a position opposite to the diametrical direction of the hinge means 54 of the top wall 76, and the consumer shows the outer lid 56 from the closed position shown in FIG. 8 to FIG. When turning to the open position, a finger can be easily applied. An annular locked groove 84 is formed at the lower end of the inner peripheral surface of the skirt wall 78 to engage with the locking protrusion 64 of the locking wall 60 when the outer lid 56 is closed.

When the description is continued with reference to FIG. 6, the inner plug 4 and the lid body 6 as described above are combined and distributed as shown in FIG. More specifically, the lid main body 6 is aligned with the inner plug 4, that is, the positioning projection 72 of the lid main body 6 is aligned with the positioning groove 18 of the inner plug 4 in the circumferential direction, and the lid main body 6 is fitted to the inner plug 4. . Thus, the locked protrusions 70a and 70b and the protrusion 74 formed on the lid body 6 elastically overcome the locking protrusion 14 of the inner plug 4 and are locked with the locked protrusions 70a and 70b. The inner plug 4 and the lid body 6 are fixed by cooperation with the protrusion 14. The hook-shaped piece 88 of the lid body 6 passes through the ring 48 of the inner plug 4 so that the tip of the hook-shaped piece 88 is locked to the ring 48. At this stage, the hook-shaped piece 88 is viewed from above the hook-shaped piece 88. The tip in the counterclockwise direction is not brought into contact with the inner peripheral surface of the ring 48. The protrusion 74 is located on the counterclockwise side of the protrusion 26 in FIG. 2, and the side edge of the notch 68 on the counterclockwise side is the opposite of the surface of the ratchet pawl 30 that is sharply cut outward in the radial direction in FIG. Located on the clockwise side. This reliably prevents the lid body 6 from rotating in the direction opposite to the predetermined direction with respect to the inner plug 4 in the combined state, that is, in the clockwise direction. In this state, the inner plug 4 and the lid main body 6 are attached to the mouth-and-neck portion 90 of an appropriate container such as glass or polyethylene terephthalate, which is illustrated by a two-dot chain line in FIG. The mouth-and-neck portion 90 has a substantially cylindrical shape with an upper surface opened, and an annular locking jaw portion 92 is formed at the upper end portion of the outer peripheral surface. The inner plug 4 and the lid main body 6 are attached to the mouth / neck part 90 by inserting the sealing wall 12 of the inner stopper 4 into the mouth / neck part 90 and fitting the attachment wall 10 on the outer periphery of the mouth / neck part 90. . The outer peripheral surface of the seal wall 12 is brought into close contact with the inner peripheral surface of the mouth / neck portion 90. The locking protrusion 16 formed on the inner peripheral surface of the mounting wall 10 elastically climbs over the locking jaw portion 92 of the mouth-and-neck portion 90 and is locked to this, and is attached to the mouth-and-neck portion 90 of the container. The inner plug 4 and the lid body 6 are held.

  When the contents contained in the container are consumed, first, for example, the lid body 6 is illustrated in FIG. 7 with respect to the inner plug 4 by placing a finger on the outer peripheral surface of the fitting wall 52 of the lid body 6. From the state to the state shown in FIG. 8, it is rotated over an angle range of about 180 degrees in a predetermined direction, that is, counterclockwise as viewed from above. Such rotation is performed while maintaining the close contact between the inner peripheral surface of the mounting wall 10 in the inner plug 4 and the outer peripheral surface of the seal wall 58 in the lid body 6. At this time, the hook-shaped piece 88 formed on the lower surface of the cover wall 50 is also rotated counterclockwise as viewed from above, but the hook-shaped piece 88 is engaged with the ring 48 of the inner plug 4. A counterclockwise reaction force is generated in the rotation. When the lid main body 6 is rotated against the reaction force, stress concentrates on the fracture start end portion 37 of the deformation region 42, and the thin line 36 starts to break. When the rotation is continued, the hook-shaped piece 88 and the ring 48 are rotated counterclockwise as viewed from above along with the rotation while maintaining the engaged state. At that time, the ring 48 is connected to the deformation region 42 via the support column 46, and the deformation region 42 is sandwiched between the breakable outer arc-shaped portion 38 and the inner arc-shaped portion 40. To do. However, as shown in FIG. 9, the deformation region 42 is appropriately folded below the column 46 with the downstream end of the deformation region 42 (shown by a two-dot chain line in FIG. 2) connected to the blocking wall 8, and thus the passage opening 94 Is formed. When the rotation reaches approximately 180 degrees, the projecting portion 74 comes into contact with the projecting portion 28, and the subsequent rotation is prevented, so that the consumer can recognize the completion of the rotation. Further, when the lid body 6 is rotated counterclockwise with respect to the inner plug 4 as described above, the side edge portion of the notch 68 on the counterclockwise side elastically climbs over the inclined surface of the ratchet pawl 30, The side edge of the notch 68 on the counterclockwise side is positioned on the counterclockwise side of the surface of the ratchet pawl 30 that is sharply cut outward in the radial direction, so that the lid body 6 is clockwise with respect to the inner plug 4. It is prevented from rotating in the direction.

  Next, when the outer lid 56 is forced upward by placing a finger on the collar 82, the outer lid 56 is pivoted from the closed position shown in FIG. 8 to the open position shown in FIG. Is exposed. Next, if the container is tilted appropriately, the contents in the container are guided to the dispensing wall 62 through the passage opening 94 and the discharge opening 66 and discharged. After a predetermined amount of content has been poured out, when the outer lid 56 is pivoted and closed with the hinge means 54 as the pivot center, the outer lid 56 is covered with the cover wall 50 of the lid body 6 and the pouring wall formed on the upper surface thereof. 62 is covered. The sealing wall 80 of the outer lid 56 is caused to enter the pouring wall 62, and the outer peripheral surface of the sealing wall 80 is brought into close contact with the inner peripheral surface of the pouring wall 62 and sealed.

  FIG. 11 illustrates another embodiment of a container lid constructed in accordance with the present invention. In the inner plug 104 illustrated in FIG. 11, the two deformation regions 142 formed in the blocking wall 108 are gradually inclined downward along the outer arc-shaped portion 138 and the inner arc-shaped portion 140. Accordingly, when the passage opening 194 is formed as shown in FIG. 12, the deformation region 142 that is broken and deformed upward is prevented from interfering with the blocking wall 108 below the column 146, and the column. By applying a downward force in the axial direction to 146, it becomes possible to easily form a large passage opening 194 sufficiently larger than that in which the blocking wall is leveled. The configuration other than the above-described configuration in the embodiment illustrated in FIG. 11 is substantially the same as the above-described embodiment illustrated in FIGS.

4: Inner plug 6: Lid main body 8: Blocking wall 10: Mounting wall 18: Positioning groove 26: Protruding part 28: Protruding part 30: Ratchet claw 36: Thin line 38: Outer arcuate part 40: Inner arcuate part 42: Deformation region 44: Locked means 46: Support column 48: Ring 50: Cover wall 52: Fitting wall 56: Outer lid 66: Outlet opening 68: Notch 72: Positioning protrusion 74: Protruding part 76: Top wall 78: Skirt wall 86: Locking means 88: Hook-shaped piece 90: Mouth neck part 92: Locking jaw part 94: Passing opening 104: Inner plug 108: Blocking wall 138: Outer arcuate part 140: Inner arcuate part 142: Deformation area 146: Post 194: Passing opening

Claims (9)

It is composed of a synthetic resin inner stopper attached to the mouth and neck of the container and a synthetic resin lid body attached to the inner stopper,
The inner plug includes a circular blocking wall and a cylindrical mounting wall connected to the outer peripheral edge of the blocking wall, and is fitted to the mouth and neck of the container by fitting the mounting wall to the outer peripheral surface of the mouth and neck of the container The occlusion wall occludes the mouth and neck of the container;
The lid body includes a circular covering wall and a cylindrical fitting wall connected to the outer peripheral edge of the covering wall, and the inner plug is fitted to the outer peripheral surface of the mounting wall of the inner plug. The cover wall is located above the blocking wall of the inner plug,
At least one breakable thin line is formed on the closing wall of the inner plug, and the breakable thin line includes an outer arcuate portion extending from the break start end and an inner arcuate portion extending from the break start end. has, arc-shaped deformed region is defined between the outer arc-shaped portion and the inner arcuate portion,
Locked means is disposed on the upper surface near the break start end in the deformation region,
At least one discharge opening is formed in the cover wall of the lid body. When the lid body is attached to the inner plug on the lower surface of the cover wall, the cover body is locked to the locked means. A locking means is provided,
When the lid body is rotated in a predetermined direction with respect to the inner plug while the lid body is mounted on the inner plug, a force is applied to the deformation region via the locking means and the locked means. The breakable thin line of the inner plug is broken and the deformation region is deformed, thereby creating a passage opening in the closure wall of the inner plug;
A container lid characterized by that.   Two to three breakable thin lines are formed at equal intervals in the circumferential direction on the closing wall of the inner plug, and two to three deformation regions are defined at equal intervals in the circumferential direction. The container lid according to claim 1.   At least one positioning groove is formed on one of the outer peripheral surface of the mounting wall of the inner plug and the inner peripheral surface of the fitting wall of the lid body, and at least one positioning protrusion is formed on the other. By inserting the positioning projection into the positioning groove and mounting the lid body on the inner plug, the relative angular position of the lid body with respect to the inner plug is regulated, and the inner plug The container lid according to claim 1 or 2, wherein each of the locking means of the lid body is locked to each of the locked means.   The locked means of the inner plug is composed of a column extending upward from the deformation region and a ring attached to the column, and the locking unit of the lid body is suspended from the cover wall. The container lid in any one of Claim 1 to 3 comprised from the hook-shaped piece.   The outer arc-shaped portion and the inner arc-shaped portion of the breakable thin line formed on the closing wall of the inner plug extend from the break starting end in a counterclockwise direction when viewed from above, and the predetermined direction is upward. The container lid according to claim 1, which is counterclockwise when viewed from the top.   The outer peripheral surface of the mounting wall of the inner plug and the inner peripheral surface of the fitting wall of the lid body cooperate with each other so that the lid body is opposite to the predetermined direction with respect to the inner plug. The container lid according to any one of claims 1 to 5, wherein rotation preventing means for preventing rotation in a direction is formed.   The outer peripheral surface of the mounting wall of the inner plug and the inner peripheral surface of the fitting wall of the lid body are restricted to a predetermined angle of rotation in the counterclockwise direction when viewed from above the lid body with respect to the inner plug. The container lid according to claim 1, wherein rotation limiting means is formed.   On the outer peripheral surface of the mounting wall of the inner plug and the inner peripheral surface of the fitting wall of the lid body, the lid body is restricted by the rotation restricting means in the counterclockwise direction with respect to the inner plug. The container lid according to claim 7, wherein reverse rotation preventing means is formed for preventing the lid body from rotating in the opposite direction to the predetermined direction with respect to the inner stopper when the lid is rotated to a maximum. The deformation region defined in the closed wall of the inner plug is gradually inclined downward from the breaking start end toward the breaking direction of the breakable thin line. The container lid according to 1.

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