PACKAGING MATERIAL, BLANK SHEET, AND PACKAGING METHOD

Description

CROSS REFERECE TO RELATED APPLICATION

This application claims benefit of priority to Japanese Patent Application 2024-200075, filed November 15, 2024, the entire content of which is incorporated herein by reference.

BACKGROUND

Technical Field

The present disclosure relates to a packaging material, a blank sheet, and a packaging method.

Background Art

For example, JP 2013-67416 A discloses a packaging material including an opening and closing lid in which a slit is provided and an insertion portion that can be inserted into the slit.

SUMMARY

In the packaging material described in JP 2013-67416 A, there is room for improvement in terms of easily locking the opening and closing lid.

Therefore, the present disclosure provides a packaging material including a lid that can be easily locked, a blank sheet with which the packaging material can be assembled by being folded, and a packaging method for packaging an object with the packaging material.

An aspect of the present disclosure provides a packaging material including:

a body;

a lid that is provided to be openable and closable on the body, has a first main surface and a second main surface opposite to the first main surface, and is provided with a through-hole penetrating in a first direction from the first main surface toward the second main surface; and

a lock tab provided on the body and having an outer shape at least partially larger than the through-hole, and

in a state where the lid is closed with respect to the body and the lock tab is disposed on the first main surface side, when the lock tab moves in the first direction, at least one of the lock tab or the through-hole is deformed, and the lock tab is inserted into the through-hole, and the lock tab is disposed on the second main surface side.

An aspect of the present disclosure provides a blank sheet with which the above-described packaging material can be assembled by being folded.

An aspect of the present disclosure provides a method for packaging an object with the above-described packaging material, the method including:

storing the object in the packaging material; and

locking the lid, in which

in the locking the lid,

in a state where the lid is closed with respect to the body and the lock tab is disposed on the first main surface side, the lock tab is moved in the first direction,

at least one of the lock tab or the through-hole is deformed, and the lock tab is inserted the lock tab into the through-hole, and

after the lock tab is inserted into the through-hole, the lock tab is disposed on the second main surface side.

According to the present disclosure, it is possible to provide a packaging material including a lid that can be easily locked, a blank sheet for assembling the packaging material by being folded, and a packaging method for packaging an object with the packaging material.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view of an example of a blank sheet that is folded to assemble a packaging material according to a first embodiment;

FIG. 2 is a perspective view of an example of the packaging material according to the first embodiment;

FIG. 3 is a perspective view of an example of the packaging material according to the first embodiment;

FIG. 4 is a plan view of an example of the packaging material illustrated in FIG. 3;

FIG. 5 is an enlarged cross-sectional perspective view of the packaging material illustrated in FIG. 3 taken along a line A-A;

FIG. 6 is a plan view of an example of a blank sheet with which a packaging material according to a second embodiment can be assembled;

FIG. 7 is a perspective view of an example of the packaging material according to the second embodiment;

FIG. 8 is a perspective view of an example of the packaging material according to the second embodiment;

FIG. 9 is a plan view of an example of the packaging material illustrated in FIG. 8;

FIG. 10 is a perspective view of a packaging material of a first modification;

FIG. 11 is a plan view of a packaging material of a second modification;

FIG. 12 is a plan view of a lid of a packaging material of a third modification; and

FIG. 13 is a plan view of a packaging material of a fourth modification.

DETAILED DESCRIPTION

Background to the Present Disclosure

In the packaging material described in JP 2013-67416 A, the lid is connected to an opening side of a body, and an insertion piece protrudes from the lid. A slit is provided on the insertion piece side at a connection portion between the lid and the insertion piece. Further, a lock piece having an insertion portion is formed in the body. In a state that the lid is closed and the insertion piece is inserted into the body, the lid is locked to a closed position by the insertion portion of the lock piece being inserted into the slit.

For example, in the packaging material described JP 2013-67416 A, the insertion portion is inserted into the slit in a state where the insertion portion is aligned with the slit. The slit is a relatively small hole with respect to the packaging material. In a state where the insertion is inserted into the slit, the insertion is smaller than the slit in a view in a direction in which the insertion portion is inserted into the slit.

However, in the packaging material described in JP 2013-67416 A, the slit is provided on the insertion piece side at the connection portion between the lid and the insertion piece, and thus, it is difficult to align the insertion portion with the slit. It is therefore difficult to insert the insertion portion into the slit in a state where the insertion portion is aligned with the slit. In addition, it is troublesome for a user to insert the insertion portion into the slit after moving the insertion portion in the direction away from the slit.

Further, in the packaging material described in JP 2013-67416 A, the insertion portion is smaller than the slit, but the slit is a hole relatively small with respect to the packaging material, and thus, it is difficult to insert the insertion portion into the slit.

Thus, in order to solve the above problems, the present inventors have studied a packaging material including a lid that can be easily locked, and have reached the present disclosure.

A first embodiment of the present disclosure is described below with reference to the drawings. Furthermore, in each drawing, each element is exaggerated in order to facilitate the description.

First Embodiment

A packaging material of the present embodiment can be assembled by a blank sheet being folded.

FIG. 1 is a plan view of an example of a blank sheet 1A with which a packaging material according to a first embodiment can be assembled. FIG. 2 is a perspective view of an example of a packaging material 2A according to the first embodiment. In the drawing, an X-axis direction and a Y-axis direction indicate a horizontal direction, and a Z-axis direction indicates a vertical direction. In the drawing, a first direction Z1 and a second direction Z2 are parallel to the Z-axis direction, a third direction X1 and a fourth direction X2 are parallel to the X-axis direction and a fifth direction Y1 and a sixth direction Y2 are parallel to the Y-axis direction.

Blank Sheet

The blank sheet 1A illustrated in FIG. 1 can be folded to assemble the packaging material 2A illustrated in FIG. 2. The blank sheet 1A is folded along a folding line 71 or a cut 75 to assemble the packaging material 2A. In FIG. 1, the outside of the blank sheet 1 can be seen. The folding line 71 may be a ruled line formed by pushing a surface of the blank sheet 1A on a line, or an intermittent notch may be formed on the ruled line. For example, the blank sheet 1A may be made of cardboard.

Packaging Material

The packaging material 2A according to the first embodiment is described.

FIG. 3 is a perspective view of an example of the packaging material 2A according to the first embodiment. FIG. 3 is a perspective view of an example of the packaging material 2A in a state where a lid 6A is locked. FIG. 4 is a plan view of an example of the packaging material 2A illustrated in FIG. 3. FIG. 5 is an enlarged cross-sectional perspective view of the packaging material 2A illustrated in FIG. 3 taken along a line A-A.

As illustrated in FIGS. 2 and 3, the packaging material 2A includes a body 3, the lid 6A, a lock tab 7A and an arm 8. A space is provided inside the packaging material 2A to package an object.

The body 3 has a box shape. An outer shape of the body 3 has a rectangular parallelepiped shape.

The lid 6A is provided to be openable and closable on the body 3. The lid 6A has a rectangular shape. The lid 6A has a first main surface 81 and a second main surface 82 opposite to the first main surface 81. The lid 6A is provided with a through-hole 20A penetrating in the first direction Z1 from the first main surface 81 toward the second main surface 82. In viewing the lid 6A toward the first direction Z1, the first main surface 81can be seen. In other words, viewing the lid 6A toward the first direction Z1 means viewing the lid 6A in a direction along the direction from the first main surface 81 toward the second main surface 82.

As illustrated in FIG. 4, in a state where the lid 6A is closed with respect to the body 3, in viewing the packaging material 2A toward the first direction Z1, the through-hole 20A is provided in the lid 6A on a first side positioned on the body 3 side provided the lock tab 7A. The through-hole 20A has a semicircular shape in a view toward the first direction Z1. In the view toward the first direction Z1, a length L1 is larger than a length L2. The length L1 is a maximum length of the through-hole 20A in the X-axis direction. The length L2 is a maximum length of the through-hole 20A in the Y-axis direction. The length L1 is 1.2 times or more and 2.5 times or less the length L2. The length L1 is preferably 1.5 times or more and 2.2 times or less the length L2. More preferably, the length L1 is 1.8 times or more and 2.0 times or less the length L2.

The through-hole 20A is defined by an outer shape line 30A. The outer shape line 30A includes a first outer shape line 31A and a second outer shape line 32A. The first outer shape line 31A is provided in the lid 6A on the first side positioned on the body 3 side provided the lock tab 7A. The second outer shape line 32A is connected to each of both ends of the first outer shape line 31A. A portion of the second outer shape line 32A is provided at a position away from the first outer shape line 31A in a direction from the first side toward the second side opposite to the first side. The portion of the second outer shape line 32A is provided at a position away from the first outer shape line 31A in the fifth direction Y1. In the second outer shape line 32A, the second outer shape line 32A is separated from the first outer shape line 31A in the fifth direction Y1 as being separated from a portion connected to the first outer shape line 31A. The second outer shape line 32A is provided on the lid 6A so as to draw a semicircle in the view toward the first direction Z1.

As illustrated in FIGS. 2 and 3, the lock tab 7A is provided on the body 3. The lock tab 7A is foldable in the fifth direction Y1 from the body 3. As illustrated in FIG. 4, the lock tab 7A has a rectangular shape in the view toward the first direction Z1. The lock tab 7A has an outer shape larger than the through-hole 20A. In the view toward the first direction Z1, an area of the lock tab 7A is 1.1 times or more and 1.5 times or less an area of the through-hole 20A.

A length L11 is longer than a length L12. The length L11 is a maximum length of the lock tab 7A in the X-axis direction. The length L12 is a maximum length of the lock tab 7A in the Y-axis direction. The length L11 is 1.2 times or more and 2.5 times or less the length L12. Preferably, the length L11 is 1.5 times or more and 2.2 times or less the length L12. More preferably, the length L11 is 1.8 times or more and 2.0 times or less the length L12.

In the first embodiment, the length L11 of the lock tab 7A is substantially equal to the length L1 of the through-hole 20A, and the length L12 of the lock tab 7A is substantially equal to the length L2 of the through-hole 20A. In the present disclosure, "substantially" includes an error of 5% or more and 10% or less.

As illustrated in FIGS. 2 and 4, the lock tab 7A has a plurality of folds 60. As illustrated in FIG. 4, the plurality of folds 60 has a linear shape. The plurality of folds 60 is provided in directions intersecting with each other. In a state where the lock tab 7A locks the lid 6A, the plurality of folds 60 is disposed inside the outer shape line 30A. As illustrated in FIG. 2, the lock tab 7A is foldable in the second direction Z2 opposite to the first direction Z1 and is foldable along the plurality of folds 60. As illustrated in FIG. 4, the lock tab 7A folded along the plurality of folds 60 has a trapezoidal shape in the view toward the first direction Z1. The lock tab 7A folded along the plurality of folds 60 is smaller than the through-hole 20A in the view toward the first direction Z1.

In a state where the lid 6A is closed with respect to the body 3 and the lock tab 7A is disposed on the first main surface 81 side, the lock tab 7A is movable in the first direction Z1. When the lock tab 7A moves in the first direction Z1, the lock tab 7A can be deformed. For example, when the lock tab 7A moves in the first direction Z1, the lock tab 7A is folded in the second direction Z2 at 90 degrees or more along the plurality of folds 60. The lock tab 7A can be inserted into the through-hole 20A, by deforming the lock tab 7A.

As illustrated in FIG. 5, when the lock tab 7A is inserted into the through-hole 20A, the lock tab 7A is disposed on the second main surface 82 side. In a state where the lock tab 7A is inserted into the through-hole 20A, the lock tab 7A moves in the first direction Z1 to return to a state before the lock tab 7A is inserted into the through-hole 20A. In a state where the lock tab 7A is inserted into the through-hole 20A, when the lock tab 7A moves in the first direction Z1, at least a portion of the lock tab 7A can come into contact with the second main surface 82. In other words, when the lock tab 7A is inserted into the through-hole 20A, at least a portion of the lock tab 7A is disposed so as to be contactable with the second main surface 82.

As illustrated in FIG. 4, in a state where the lock tab 7A is disposed on the second main surface 82 side, the through-hole 20A is closed by the lock tab 7A in the view toward the first direction Z1. In a state where the lock tab 7A is inserted into the through-hole 20A, the through-hole 20A is closed by a portion of the lock tab 7A positioned within the outer shape line 30A in viewing the lid 6A toward the first direction Z1. In the present disclosure, a state in which the through-hole 20A is closed by the lock tab 7A means a state in which the inside of the packaging material 2A cannot be seen from the through-hole 20A in the view toward the first direction Z1.

The arm 8 makes the lock tab 7A movable in the sixth direction Y2 intersecting the first direction Z1. When the lock tab 7A moves in the sixth direction Y2, the lock tab 7A can be pulled out from the through-hole 20A in a state where the lid 6A is locked. In the locked lid 6A, lock of the lid 6A is released by pulling out the lock tab 7A from the through-hole 20A.

The arm 8 is provided in the body 3. The arm 8 is a portion of the body 3. The arm 8 is connected to the lock tab 7A and is foldable in the sixth direction Y2 intersecting the first direction Z1. The arm 8 is foldable from the body 3 in the sixth direction Y2. The lock tab 7A is movable in the sixth direction Y2 by the arm 8 being folded in the sixth direction Y2.

A packaging method for packaging an object with the packaging material 2A according to the present embodiment is described.

The packaging method includes storing an object in the packaging material 2A and locking the lid 6A.

In the storing the object in the packaging material 2A, the object is stored in the packaging material 2A in a state where the lid 6A is opened. For example, an electronic device is stored in the packaging material 2A.

After the storing the object in the packaging material 2A is completed, the locking the lid 6A is performed. In the locking the lid 6A, the lid 6A is locked by the lock tab 7A. The locking the lid 6A is described.

In the locking the lid 6A, the lid 6A is closed with respect to the body 3. The lid 6A is closed with respect to the body 3 in a state where the arm 8 is folded in the sixth direction Y2.

Subsequently, the lock tab 7A is disposed on the first main surface 81 side. The lock tab 7A is disposed on the first main surface 81 side by bringing the arm 8 from a state of being folded in the sixth direction Y2 to a state of not being folded in the sixth direction Y2 in a state where the lid 6A is closed with respect to the body 3. The lock tab 7A is disposed on the first main surface 81 side such that the outer shape line 30A intersects the lock tab 7A.

Subsequently, in a state where the lid 6A is closed with respect to the main body 3 and the lock tab 7A is disposed on the first main surface 81, the lock tab 7A is moved in the first direction Z1. When the user pushes the lock tab 7A in the first direction Z1, the lock tab 7A moves in the first direction Z1.

Subsequently, the lock tab 7A is deformed to insert the lock tab 7A into the through-hole 20A. The lock tab 7A is deformed into a size that can be inserted into the through-hole 20A, and the lock tab 7A is inserted into the through-hole 20A. For example, the lock tab 7A is deformed by coming into contact with a portion of the lid 6A and receiving force for moving in the first direction Z1 from the outside. The lock tab 7A is folded in the second direction Z2 along the plurality of folds 60 by coming into contact with a portion of the lid 6B and receiving force for moving in the first direction Z1 from the outside.

After the lock tab 7A is inserted into the through-hole 20A, the lock tab 7A is disposed on the second main surface 82 side. When the lock tab 7A is disposed on the second main surface 82 side, the lock tab 7A deformed when inserted into the through-hole 20A, returns to the original shape. For example, when the lock tab 7A is inserted into the through-hole 20A, the lock tab 7A folded in the second direction Z2 along the plurality of folds 60 is deformed in a direction to return to the original shape from the state of being folded in the second direction Z2 when disposed on the second main surface 82 side

When the lock tab 7A is disposed on the second main surface 82 side, a portion of the lock tab 7A comes into contact with the second main surface 82. When a portion deformed when the lock tab 7A is inserted into the through-hole 20A, returns to the original shape, a portion of the lock tab 7A comes into contact with the second main surface 82. The portion deformed when the lock tab 7A is inserted into the through-hole 20A, comes into contact with the second main surface 82. The portion deformed when the lock tab 7A is inserted into the through-hole 20A comes into contact with the second main surface 82, the lid 6A is locked.

Note that the object may be transported in a state of being packaged in the packaging material 2A. For example, the electronic device may be transported in a state of being packaged in the packaging material 2A.

An effect of the packaging material 2A according to the present embodiment is described.

The packaging material 2A includes the body 3, the lid 6A provided to be openable and closable on the body 3, and the lock tab 7A provided on the body 3. The lid 6A has the first main surface 81 and the second main surface 82 opposite to the first main surface 81. The lid 6A is provided with the through-hole 20A penetrating in the first direction Z1 from the first main surface 81 toward the second main surface 82. The lock tab 7A has an outer shape larger than the through-hole 20A. In a state where the lid 6A is closed with respect to the body 3 and the lock tab 7A is disposed on the first main surface 81 side, when the lock tab 7A moves in the first direction Z1, the lock tab 7A is inserted into the through-hole 20A. The lock tab 7A is disposed on the second main surface 82.

With such a configuration, in the packaging material 2A, the lid 6A can be easily locked. The through-hole 20A is provided in the lid 6A, and thus, in a state where the lid 6A is closed with respect to the body 3, the lock tab 7A is easily disposed on the first main surface 81 side such that the outer shape line 30A intersects with the lock tab 7A. Further, the lock tab 7A is provided on the body 3, and thus, when the lock tab 7A is disposed on the first main surface 81 side, the outer shape line 30A intersects with the lock tab 7A. Thus, the lock tab 7A can be aligned with the position intersecting with the through-hole 20A by simple operation.

Although the lock tab 7A has an outer shape larger than the through-hole 20A, but, the lock tab 7A is deformed when the lock tab 7A is inserted into the through-hole 20A, and thus, the lock tab 7A can be easily inserted into the through-hole 20A. Further, the lock tab 7A is positioned on the second main surface 82 side by being inserted into the through-hole 20A, and can lock the lid 6A.

As described above, in the packaging material 2A, the lid 6A can be easily locked by simple operation. Thus, the operation of locking the lid 6A can also be implemented by machine. Work efficiency can be improved by locking the lid 6A by machine.

In a state where the lock tab 7A is disposed on the second main surface 82 side, the through-hole 20A is closed by the lock tab 7A in viewing the lid toward the first direction Z1.

With such a configuration, the inside of the packaging material 2A cannot be seen from the through-hole 20A by the lock tab 7A.

The lock tab 7A has a plurality of folds 60 and is foldable in the second direction Z2 opposite to the first direction Z1 along the plurality of folds 60.

With such a configuration, the lock tab 7A is easily inserted into the through-hole 20A. In addition, by folding the plurality of folds 60 in the second direction Z2, when the lock tab 7A is positioned on the second main surface 82 side, a portion of the lock tab 7A comes into more contact with the second main surface 82, and the lid 6A can be locked more firmly.

The lock tab 7A folded along the plurality of folds 60 is smaller than the through-hole 20A in the view toward the first direction Z1.

With such a configuration, when the lock tab 7A is moved in the first direction Z1 in a state where the lock tab 7A is positioned on the first main surface 81 side, the lock tab 7A is easily inserted into the through-hole 20A.

When the lock tab 7A moves in the first direction Z1, the lock tab 7A is folded in the second direction Z2 at 90 degrees or more along the plurality of folds 60.

When the lock tab 7A moves in the first direction Z1, the lock tab 7A is folded in the second direction Z2 at 90 degrees or more along the plurality of folds 60, so that the lock tab 7A is more easily inserted into the through-hole 20A.

In a state where the lid 6A is closed with respect to the body 3, in the view toward the first direction Z1, the through-hole 20A is provided in the lid 6A on the first side positioned on the body 3 side provided the lock tab 7A.

With such a configuration, in the packaging material 2A in a state where the lid 6A is locked, the lock tab 7A can be made difficult to come off from the through-hole 20A by an impact from the outside of the packaging material 2A.

In the view toward the first direction Z1, the through-hole 20A is defined by the outer shape line 30A. The outer shape line 30A includes the first outer shape line 31A and the second outer shape line 32A. The first outer shape line 31A is provided in the lid 6A on the first side positioned on the body 3 side provided the lock tab 7A. At least part of the second outer shape line 32A is provided at a position away from the first outer shape line 31A in a direction from the first side toward the second side opposite to the first side.

With such a configuration, the lock tab 7A is more easily inserted into the through-hole 20A defined by the outer shape line 30A. Further, the lock tab 7A is more easily inserted, and thus, when the lock tab 7A is inserted into the through-hole 20A, a portion of the lid 6A provided with the through-hole 20A is less likely to be broken due to the insertion of the lock tab 7A.

The packaging material 2A further includes the arm 8 that is provided on the body 3, is connected to the lock tab 7A, and is foldable in the sixth direction Y2 intersecting the first direction Z1.

With such a configuration, the lock tab 7A can be easily pulled out from the through-hole 20A when the lock tab 7A is pulled out from the through-hole 20A to release the lock of the lid 6A locked by the lock tab 7A. In addition, the packaging material 2A has the arm 8, and thus, the lock tab 7A can be moved in a direction away from the lid 6A, that is, in the sixth direction Y2, so that the lid 6A can be easily opened and closed with respect to the body 3.

The blank sheet 1A can be folded to assemble the above-described packaging material 2A.

With such a configuration, the packaging material 2A including the lid 6A that can be easily locked can be assembled by the blank sheet 1A being folded.

The packaging method is a method for packaging an object with the above-described packaging material 2A. The packaging method includes storing an object in the packaging material 2A and locking the lid 6A. In the locking the lid 6A, the lock tab 7A is moved in the first direction Z1 in a state where the lid 6A is closed with respect to the body 3 and the lock tab 7A is positioned on the first main surface 81 side A. At least one of the lock tab 7A or the through-hole 20A is deformed to insert the lock tab 7A into the through-hole 20A. After the lock tab 7A is inserted into the through-hole 20A, the lock tab 7A is disposed on the second main surface 82 side.

As a result of the object being packaged by the packaging material 2A, work for packaging the object can be efficiently performed. Further, the locking the packaging material 2A can also be performed by machine. For example, in a case where an electronic device is packaged with the packaging material 2A by machine, the entire work from manufacturing the electronic device to a storing the electronic device with the packaging material 2A and locking the lid 6A of the packaging material 2A can be performed by the machine. It is therefore possible to efficiently distribute the electronic device to the market.

Note that in the present embodiment, it has been described that the blank sheet 1A is made of cardboard, but the blank sheet 1A is not limited thereto. For example, the blank sheet 1A may be heavy paper, a polypropylene sheet, or the like.

Although it has been described that the packaging material 2A includes the arm 8, the packaging material 2A does not have to include the arm 8.

Note that the body 3 may have an opening or does not have to have an opening.

Note that the lid 6A may be capable of opening and closing the opening of the body 3 having the opening.

Although the outer shape of the body 3 has been described as a rectangular parallelepiped shape, the outer shape is not limited thereto. For example, the body 3 may have a pentagonal prism shape.

Note that in a state where the lid 6A is closed with respect to the body 3, the through-hole 20A is provided in the lid 6A on the first side positioned on the body 3 side provided the lock tab 7A in the view toward the first direction Z1. However, the present disclosure is not limited to this. For example, in a state where the lid 6A is closed with respect to the body 3 in the view toward the first direction Z1, the through-hole 20A may be provided on the second side opposite to the first side.

Although it has been described that the through-hole 20A has a semicircular shape when viewed in the direction toward the first direction Z1, the shape is not limited thereto. For example, the through-hole 20A may have a trapezoidal shape.

Although it has been described that the length L1 of the through-hole 20A is longer than the length L2 of the through-hole 20A, the length L1 does not have to be longer than the length L2.

Although it has been described that the outer shape line 30A includes the first outer shape line 31A and the second outer shape line 32A, the outer shape line 30A is not limited thereto. For example, the outer shape line 30A may include the first outer shape line 31A, the second outer shape line parallel to the first outer shape line 31A, and a plurality of third outer shape lines intersecting both ends of each of the first outer shape line 31A and the second outer shape line.

Although it has been described that the lock tab 7A has a rectangular shape in the view toward the first direction Z1, the shape is not limited thereto. For example, the lock tab 7A may have a semicircular shape, a triangular shape, or the like, when viewed in the direction toward the first direction Z1.

Although it has been described that the lock tab 7A has an outer shape larger than the through-hole 20A, the lock tab 7A is not limited thereto. For example, a portion of the lock tab 7A may have an outer shape larger than that of the through-hole 20A.

Although it has been described that the length L11 of the lock tab 7A is longer than the length L12 of the lock tab 7A, the length L11 does not have to be longer than the length L12.

Although it has been described that the length L11 of the lock tab 7A is substantially equal to the length L1 of the through-hole 20A, the lengths are not limited thereto. For example, the length L11 may be longer than the length L1.

Although it has been described that the length L12 of the lock tab 7A is substantially equal to the length L2 of the through-hole 20A, the lengths are not limited thereto. For example, the length L12 may be shorter than the length L2.

Although it has been described that the lock tab 7A has the plurality of folds 60, the present disclosure is not limited thereto. The lock tab 7A does not have to have the plurality of folds 60, and the lock tab 7A may have a fold 60.

Although it has been described that the lock tab 7A folded along the plurality of folds 60 has a trapezoidal shape in the view toward the first direction Z1, the present disclosure is not limited thereto. For example, the lock tab 7A folded along the plurality of folds 60 may have a triangular shape in the view toward the first direction Z1.

Although an example has been described where the lock tab 7A is folded in the second direction Z2 at 90 degrees or more along the plurality of folds 60 when the lock tab 7A moves in the first direction Z1, the present disclosure is not limited thereto. For example, when the lock tab 7A moves in the first direction Z1, the lock tab 7A may be folded in the second direction Z2 at less than 90 degrees along the plurality of folds 60.

Although it has been described that the through-hole 20A is closed by the lock tab 7A in viewing the lid 6A toward the first direction Z1 in the state where the lock tab 7A is positioned on the second main surface 82 side, the present disclosure is not limited thereto. For example, in a state where the lock tab 7A is positioned on the second main surface 82 side, the through-hole 20A does not have to be closed by the lock tab 7A in viewing the lid 6A in the direction toward the first direction Z1.

Although an example has been described where an electronic device is packaged with the packaging material 2A, the present disclosure is not limited thereto. For example, a book may be packaged with the packaging material 2A.

Although it has been described that the lock tab 7A is deformed by coming into contact with a portion of the lid 6A and receiving force for moving in the first direction Z1 from the outside, the present disclosure is not limited thereto. For example, the lock tab 7A may be deformed by the user folding the lock tab 7A in the second direction Z2 along the plurality of folds 60.

Note that the lid 6A may be provided with an insertion piece foldable from the lid 6A in the first direction Z1. In addition, a slit portion may be opened on the insertion piece side at a connection portion between the lid 6A and the insertion piece. In the lid 6A locked by the lock tab 7A, the lock of the lid 6A may be released by pulling out the lock tab 7A from the slit portion.

Second Embodiment

FIG. 6 is a plan view of an example of a blank sheet 1B with which the packaging material according to a second embodiment can be assembled. FIG. 7 is a perspective view of an example of a packaging material 2B according to the second embodiment.

In the second embodiment, a configuration different from that of the first embodiment is described.

The packaging material 2B according to the second embodiment is different from the packaging material 2B according to the first embodiment in that a through-hole 20B is deformed when the lock tab 7B is inserted into the through-hole 20B.

Blank Sheet

The packaging material 2B illustrated in FIG. 7 can be assembled by the blank sheet 1B illustrated in FIG. 6 being folded. The blank sheet 1B is folded along the folding line 71 or the cut 75 to assemble the packaging material 2B.

Packaging Material

FIG. 8 is a perspective view of an example of the packaging material 2B according to the second embodiment. FIG. 8 is a perspective view of an example of the packaging material 2B in a state where the lid 6B is locked. FIG. 9 is a plan view of an example of the packaging material 2B illustrated in FIG. 8.

As illustrated in FIG. 9, the through-hole 20B has a trapezoidal shape in the view toward the first direction Z1. The through-hole 20B is defined by an outer shape line 30B. The outer shape line 30B includes a first outer shape line 31B, a second outer shape line 32B, a third outer shape line 33B, and a fourth outer shape line 34B in the view toward the first direction Z1. The second outer shape line 32B is substantially parallel to the first outer shape line 31B. A length of the second outer shape line 32B in the X-axis direction is shorter than a length of the first outer shape line 31B in the X-axis direction. The third outer shape line 33B intersects the first outer shape line 31B and the second outer shape line 32B. The fourth outer shape line 34B intersects the first outer shape line 31B and the second outer shape line 32B.

In the view toward the first direction Z1, a plurality of cuts from the outer shape line 30B toward a direction away from the outer shape line 30B is provided in the lid 6B. In the view toward the first direction Z1, each of the plurality of cuts is linear. In the view the first direction Z1, the inside of the packaging material 2B cannot be seen from the plurality of cuts. The plurality of cuts includes a first cut 41B and a second cut 42B adjacent to the first cut 41B. Each of the first cut 41B and the second cut 42B has a first end 45 to be connected to the outer shape line 30B and a second end 46 opposite to the first end 45. The first cut 41B is provided in a direction away from the outer shape line 30B from a portion where the second outer shape line 32B intersects the third outer shape line 33B. In addition, the second cut 42B is also provided in a direction away from the outer shape line 30B from a portion where the second outer shape line 32B intersects the fourth outer shape line 34B.

The lid 6B has a plurality of folds. Each of the plurality of folds is linear. The plurality of folds is provided around the through-hole 20B in the view toward the first direction Z1. The plurality of folds is provided at positions away from the outer shape line 30B from the outer shape line 30B. The plurality of folds includes a linear first fold 51 extending in the X-axis direction and linear second and third folds 52 and 53 extending in the Y-axis direction. The second fold 52 and the third fold 53 face each other with the through-hole 20B interposed therebetween. The opening defined by the first outer shape line 31B, the first fold 51, the second fold 52, and the third fold 53 is larger than the outer shape of the lock tab 7B. A portion of the lid 6B can be folded in the first direction Z1 along each of the first fold 51, the second fold 52, and the third fold 53. A portion of the lid 6B can be folded at 90 degrees or less in the first direction Z1 along the first fold 51, the second fold 52, and the third fold 53.

The first fold 51 is provided at a position away from the second outer shape line 32B. The first fold 51 is provided at a position away from the second outer shape line 32B in the fifth direction Y1. The first fold 51 is provided between the first cut 41B and the second cut. The first fold 51 intersects the first cut 41B and the second cut 42B along the through-hole 20B. The first fold 51 is provided from the second end 46 of the first cut 41B to the second end 46 of the second cut 42B. The first fold 51 is substantially parallel to the second outer shape line 32B.

The second fold 52 is provided at a position away from the third outer shape line 33B. The second fold 52 is provided at a position where a portion of the second fold 52 is separated from the third outer shape line 33B in the third direction X1. The second fold 52 intersects the first cut 41B and the first outer shape line 31B provided on a first side adjacent to a body 3B side where the lock tab 7B is provided. The second fold 52 intersects the second end 46 of the first cut 41B. The second fold 52 intersects the first outer shape line 31B and the third outer shape line 33B at a portion where the first outer shape line 31B intersects the third outer shape line 33B.

As a result of the first fold 51 and the second fold 52 being folded in the first direction Z1, the first cut 41B is opened.

The third fold 53 is provided at a position away from the fourth outer shape line 34B, and the third fold 53 is provided at a position where a portion of the third fold 53 is away from the fourth outer shape line 34B in the fourth direction X2. The third fold 53 intersects the second cut 42B and the first outer shape line 31B provided on the first side positioned the body 3 side provided the lock tab 7B. The third fold 53 intersects the second end 46 of the second cut 42B. The third fold 53 intersects the first outer shape line 31B and the fourth outer shape line 34B at a portion where the first outer shape line 31B intersects the fourth outer shape line 34B.

As a result of the first fold 51 and the third fold 53 being folded in the first direction Z1, the second cut 42B expands.

Operation for locking the lid 6B of the packaging material 2B according to the second embodiment is described.

In a state where the lock tab 7B is positioned on the first main surface 81 side, the lock tab 7B is moved in the first direction Z1. When the lock tab 7B moves in the first direction Z1, the through-hole 20B is deformed. The lock tab 7B is inserted into the through-hole 20B. When the lock tab 7B moves in the first direction Z1, the through-hole 20B becomes larger than that before the lock tab 7B is inserted into the through-hole 20B in the view toward the first direction Z1. The through-hole 20B becomes large as a result of a portion of the lid 6B being folded in the first direction Z1.

When the lock tab 7B is inserted into the through-hole 20B, a portion of the lid 6B provided with the plurality of cuts is folded in the first direction Z1. When the lock tab 7B is inserted into the through-hole 20B, the lock tab 7B is folded at a larger angle in the first direction Z1 along the first fold 51, the second fold 52, and the third fold 53 in the lid 6B than before the lock tab 7B is inserted into the through-hole 20B. For example, when the lock tab 7B is inserted into the through-hole 20B, the lock tab 7B is folded at 90 degrees or more in the first direction Z1 along the first fold 51, the second fold 52, and the third fold 53 in the lid 6B. The plurality of cuts, that is, the first cut 41B and the second cut 42B are further opened by inserting the lock tab 7B into the through-hole 20B.

When the lock tab 7B is inserted into the through-hole 20B, the lock tab 7B is disposed on the second main surface 82 side. When a portion of the lock tab 7B comes into contact with the second main surface 82, the lid 6B is locked. Further, as a result of a portion of the lock tab 7B coming into contact with the second main surface 82, the first cut 41B and the second cut 42B are closed.

An effect of the packaging material 2B according to the present embodiment described.

The packaging material 2B includes the body 3, the lid 6B provided on the body 3 so as to be openable and closable, and the lock tab 7B provided on the body 3. The lid 6B has the first main surface 81 and the second main surface 82 opposite to the first main surface 81. The lid 6B is provided with the through-hole 20B penetrating in the first direction Z1 from the first main surface 81 toward the second main surface 82. In the view toward the first direction Z1, the first cut 41B and the second cut 42B directed in a direction away from the outer shape line 30B from the outer shape line 30B defining the through-hole 20B are provided in the lid 6B. The lock tab 7B has an outer shape larger than the through-hole 20B. In a state where the lid 6B is closed with respect to the body 3 and the lock tab 7B is positioned on the first main surface 81 side, when the lock tab 7B moves in the first direction Z1, the through-hole 20B is deformed, and the lock tab 7B is inserted into the through-hole 20B. When the lock tab 7B is inserted into the through-hole 20B, the lock tab 7B is disposed on the second main surface 82 side.

With such a configuration, in the packaging material 2B, the lid 6B can be easily locked. In addition, as a result of the first cut 41B and the second cut 42B being provided in the lid 6B, the through-hole 20B is easily deformed when the lock tab 7A is moved in the first direction Z1 in a state where the lock tab 7B is positioned on the first main surface 81 side. As a result of the through-hole 20B being easily deformed, the lock tab 7B can be easily inserted into the through-hole 20B.

The outer shape line 30Bincludes the second outer shape line 32B and the third outer shape line 33B intersecting the second outer shape line 32B in the view toward the first direction Z1. The first cut 41B is provided in a direction away from the outer shape line 30B from a portion where the second outer shape line 32B intersects the third outer shape line 33B.

With such a configuration, when the lock tab 7B is moved in the first direction Z1 in a state where the lock tab 7B is positioned on the first main surface 81 side, the through-hole 20B is more easily deformed, so that the lock tab 7B can be easily inserted into the through-hole 20B.

When the lock tab 7B is inserted into the through-hole 20B, a portion of the lid 6B where the first cut 41B and the second cut 42B are provided is folded in the first direction Z1.

With such a configuration, when the lock tab 7B is inserted into the through-hole 20B and positioned on the second main surface 82 side, a portion of the lock tab 7B comes more contact with the second main surface 82, and the lid 6B can be locked more firmly.

In a state where the lid 6B is closed with respect to the body 3, in the view toward the first direction Z1, the through-hole 20B is provided in the lid 6B on the first side positioned on the body 3 side provided the lock tab 7B. The lid 6B has the first fold 51. The first fold 51 is provided at a position away from the outer shape line 30B. The first fold 51 intersects the first cut 41B and the second cut 42B along the through-hole 20B. A portion of the lid 6B can be folded in the first direction Z1 along the first fold 51.

With such a configuration, when the lock tab 7B is moved in the first direction Z1 in a state where the lock tab 7B is positioned on the first main surface 81 side, the through-hole 20B is easily deformed, so that the lock tab 7B can be easily inserted into the through-hole 20B.

A portion of the lid 6B can be folded at 90 degrees or less in the first direction Z1 along the first fold 51.

With such a configuration, when the lock tab 7B is inserted into the through-hole 20B and the lock tab 7B moves in the first direction Z1, the lock tab 7B is less likely to come off from the through-hole 20B. As a result of the lock tab 7B being less likely to come off from the through-hole 20B, the lid 6B can be maintained in a locked state.

The first fold 51 is provided between two adjacent cuts, that is, between the first cut 41B and the second cut 42B.

With such a configuration, when the lock tab 7B is moved in the first direction Z1 in a state where the lock tab 7B is positioned on the first main surface 81 side, the through-hole 20B is easily deformed to be larger than the outer shape of the lock tab 7B. As a result of the through-hole 20B being easily deformed to be larger than the outer shape of the lock tab 7B, the lock tab 7B can be easily inserted into the through-hole 20B.

Each of the first cut 41B and the second cut 42B has a first end 45 to be connected to the outer shape line 30B and a second end 46 opposite to the first end 45. The first fold 51 is provided from the second end 46 of the first cut 41B to the second end 46 of the second cut 42B.

With such a configuration, when the lock tab 7B is moved in the first direction Z1, a portion of the lid 6B is folded in the first direction Z1 along the first fold 51, so that the through-hole 20B is deformed to be large. As a result of the through-hole 20B becoming large, the lock tab 7B can be easily inserted into the through-hole 20B.

The lid 6B has the second fold 52 and the third fold 53. The second fold 52 and the third fold 53 are provided at positions away from the outer shape line 30B. The second fold 52 intersects the first cut 41B and the outer shape line 30B in the lid 6B provided on the first side positioned on the body 3 side provided the lock tab 7B. The third fold 53 intersects the second cut 42B and the outer shape line 30B provided on the first side. A portion of the lid 6B can be folded in the first direction Z1 along the second fold 52 and the third fold 53.

With such a configuration, when the lock tab 7B is moved in the first direction Z1 in a state where the lock tab 7B is positioned on the first main surface 81 side, the through-hole 20B is more easily deformed, so that the lock tab 7B can be easily inserted into the through-hole 20B.

Although FIG. 6 illustrates that the blank sheet 1B has the first fold 51, the second fold 52, and the third fold 53, the present disclosure is not limited thereto. For example, the blank sheet 1B does not have to have the second fold 52 and the third fold 53.

Although it has been described that the plurality of cuts, that is, the first cut 41B and the second cut 42B are provided in the lid 6B, the present disclosure is not limited thereto. For example, the lid 6B may be provided with one cut, for example, the first cut 41B.

Although it has been described that the inside of the packaging material 2B cannot be seen from the plurality of cuts in the view toward the first direction Z1, the inside of the packaging material 2B may be seen from the plurality of cuts in the view toward the first direction Z1. When the lock tab 7B is not inserted into the through-hole 20B, the inside of the packaging material 2B does not have to be able to be seen from the plurality of cuts in the view toward the first direction Z1. When the lock tab 7B is inserted into the through-hole 20B, the inside of the packaging material 2B does not have to be able to be seen from the plurality of cuts in the view toward the first direction Z1.

Although it has been described that the lid 6B has a plurality of folds, the lid 6B does not have to have a plurality of folds. For example, the lid 6B does not have to have the first fold 51, the second fold 52, and the third fold 53.

Although it has been described that the lid 6B has the first fold 51, the second fold 52, and the third fold 53, the present disclosure is not limited thereto. For example, the lid 6B does not have to have the second fold 52 and the third fold 53.

Although it has been described that the length of the second outer shape line 32B in the X-axis direction is shorter than the length of the first outer shape line 31B in the X-axis direction, the lengths are not limited thereto. For example, the length of the second outer shape line 32B in the X-axis direction may be longer than the length of the first outer shape line 31B in the X-axis direction.

Although it has been described that a portion of the lid 6B is folded at 90 degrees or less in the first direction Z1 along the first fold 51, the second fold 52, and the third fold 53, the present disclosure is not limited thereto. For example, a portion of the lid 6B may be folded at an angle more than 90 degrees in the first direction Z1 along the first fold 51, the second fold 52, and the third fold 53.

Although it has been described that the first fold 51 intersects the first cut 41B and the second cut 42B along the through-hole 20B, the first fold 51 does not have to be along the through-hole 20B.

Although it has been described that the first fold 51 is substantially parallel to the second outer shape line 32B, the first fold 51 does not have to be substantially parallel to the second outer shape line 32B.

Although it has been described that the first cut 41B is opened by the first fold 51 and the second fold 52 being folded in the first direction Z1, the present disclosure is not limited thereto. For example, the first cut 41B may be opened in a state where the first fold 51 and the second fold 52 are not folded in the first direction Z1.

Although it has been described that the second cut 42B is opened by the first fold 51 and the third fold 53 being folded in the first direction Z1, the present disclosure is not limited thereto. For example, the second cut 42B may be opened in a state where the first fold 51 and the third fold 53 are not folded in the first direction Z1.

First Modification

FIG. 10 is a perspective view of a packaging material 2C of a first modification.

As illustrated in FIG. 10, a structure of a lock tab 7A of the packaging material 2C of the first modification is the same as that of the packaging material 2A and the lock tab 7A of the first embodiment, and a structure of a lid 6B of the packaging material 2C of the first modification is the same as that of the lid 6B of the packaging material 2B of the second embodiment.

In a state where the lid 6B is closed with respect to the body 3 and the lock tab 7A is positioned on the first main surface 81 side of the lid 6B, when the lock tab 7A moves in the first direction Z1, the lock tab 7A and the through-hole 20B are deformed.

When the lock tab 7A moves in the first direction Z1, at least one of the lock tab 7A or the through-hole 20B is deformed, so that the lock tab 7A can be easily inserted into the through-hole 20B.

Second Modification

FIG. 11 is a plan view of a packaging material 2D of a second modification.

The second modification is different from the first embodiment in that the lock tab 7C of the packaging material 2D has a protrusion 62.

As illustrated in FIG. 11, the lock tab 7C of the packaging material 2B is provided with the protrusion 62. The protrusion 62 is provided at a distal end portion of the lock tab 7C. When the lock tab 7C is inserted into the through-hole 20A, the protrusion 62 is folded in the second direction Z2 from the lock tab 7C. In a state where the lock tab 7C is disposed on the second main surface 82 side, the protrusion 62 is disposed on the second main surface 82.

As a result of the lock tab 7C having the protrusion 62, the lid 6A is more firmly locked by the lock tab 7C.

Third Modification

FIG. 12 is a plan view of a lid 6C of a packaging material of a third modification.

The third modification is different from the first embodiment in that the lid 6A of the packaging material is provided with a plurality of cuts 43.

As illustrated in FIG. 12, the plurality of cuts 43 directed in a direction away from the second outer shape line 32A from the outer shape line 30A defining the through-hole 20A when in the view toward the first direction Z1 is provided in the lid 6A. The plurality of cuts 43 is provided at intervals along the second outer shape line 32A.

With such a configuration, when the lock tab 7A is inserted into the through-hole 20A, the lock tab 7A and the through-hole 20A are deformed, so that the lock tab 7A can be easily inserted into the through-hole 20A.

Fourth Modification

FIG. 13 is a plan view of a packaging material 2E of a fourth modification.

The fourth modification is different from the second embodiment in that the second fold 52 and the third fold 53 are not provided on a lid 6E of the packaging material 2E of the fourth modification, and that the inside of the packaging material 2E can be seen in viewing the plurality of cuts toward the first direction Z1.

As illustrated in FIG. 13, the lid 6E has a first cut 41E and a second cut 42E. In viewing the first cut 41E and the second cut 42E toward the first direction Z1, the inside of the packaging material can be seen. Each of the first cut 41E and the second cut 42E has a first end 45 to be connected to the outer shape line 30B and a second end 46 opposite to the first end 45.

The first cut 41E has a width in a direction intersecting a direction from the first end 45 toward the second end 46 of the first cut 41E. For example, the first cut 41E has a width of 0.5 mm or more and 10.0 mm or less in the direction intersecting the direction from the first end 45 toward the second end 46 of the first cut 41E. Preferably, the first cut 41E has a width of 0.8 mm or more and 6.0 mm or less in the direction intersecting the direction from the first end 45 toward the second end 46 of the first cut 41E. More preferably, the first cut 41E has a width of 1.0 mm or more and 3.0 mm or less in the direction intersecting the direction from the first end 45 toward the second end 46 of the first cut 41E.

The second cut 42E has a width in a direction intersecting a direction from the first end 45 toward the second end 46 of the second cut 42E. For example, the second cut 42E has a width of 0.5 mm or more and 10 mm or less in the direction intersecting the direction from the first end 45 toward the second end 46 of the second cut 42E. Preferably, the second cut 42E has a width of 0.8 mm or more and 6.0 mm or less in the direction intersecting the direction from the first end 45 toward the second end 46 of the second cut 42E. More preferably, the second cut 42E has a width of 1.0 mm or more and 3.0 mm or less in the direction intersecting the direction from the first end 45 toward the second end 46 of the second cut 42E.

When the lock tab 7B moves in the first direction Z1 in a state where the lock tab 7B is positioned on the first main surface 81 side, a portion of the lid 6E is deformed. For example, in each of the first cut 41E and the second cut 42E, a portion of the lid 6E is deformed in a direction in which a width in the direction intersecting the direction from the first end 45 toward the second end 46 of each of the first cut 41E and the second cut 42E is widened.

As a result of each of the first cut 41E and the second cut 42E having a width in the direction intersecting with the direction from the first end 45 toward the second end 46 of the first cut 41E, a portion of the lid 6E is less likely to be broken when the lock tab 7B is inserted into the through-hole 20B.

Outline of Embodiments

(1) A packaging material of the present disclosure includes a body, a lid provided to be openable and closable on the body and a lock tab provided on the body. The lid has a first main surface and a second main surface opposite to the first main surface. The lid is provided with a through-hole penetrating in a first direction from the first main surface toward the second main surface. The lock tab has an outer shape at least partially larger than the through-hole. In a state where the lid is closed with respect to the body and the lock tab is disposed on the first main surface side, when the lock tab moves in the first direction, at least one of the lock tab or the through-hole is deformed, and the lock tab is inserted into the through-hole, and the lock tab is disposed on the second main surface side.

(2) In the packaging material according to (1), in a state where the lock tab is disposed on the second main surface side, the through-hole may be closed by the lock tab in viewing the lid toward the first direction.

(3) In the packaging material according to (1) or (2), the lock tab may have at least one fold and may be foldable along the at least one fold in a second direction opposite to the first direction.

(4) In the packaging material according to (3), the lock tab folded along the at least one fold may be smaller than the through-hole in a view toward the first direction.

(5) In the packaging material according any one of (1) to (4), in a state where the lid is closed with respect to the body, the through-hole may be provided in the lid on a first side positioned on the body side provided the lock tab, in a view toward the first direction.

(6) In the packaging material according any one of (1) to (5), in a view toward the first direction, the through-hole is defined by an outer shape line. The outer shape line may include a first outer shape and a second outer shape. The first outer shape line may be provided in the lid on a first side positioned on the body side provided the lock tab. At least part of the second outer shape line may be provided at a position away from the first outer shape line in a direction from the first side toward a second side opposite to the first side.

(7) In the packaging material according to (6), in a view toward the first direction, the lid may be provided a at least one cut extending from the outer shape line in a direction away from the outer shape line.

(8) In the packaging material according to (7), the outer shape line further may include a third outer shape line intersecting the second outer shape line. The at least one cut may extend from a portion where the second outer shape line intersects the third outer shape line toward a direction away from the outer shape line.

(9) In the packaging material according to (7), the at least one cut may include a plurality of cuts, and the plurality of cuts is provided at intervals along the outer shape line.

(10) In the packaging material according to (7), when the lock tab may be inserted into the through-hole, a portion of the lid having the at least one cut is folded in the first direction.

(11) In the packaging material according to (10), in a state where the lid is closed with respect to the body, the through-hole may be provided on the first side in the view toward the first direction. The lid may be provided at a position away from the outer shape line, and have at least one fold intersecting the at least one cut along the outer shape line. A portion of the lid may be foldable in the first direction along the at least one fold.

(12) In the packaging material according to (11), the at least one cut may include a first cut and a second cut adjacent to the first cut. The at least one fold is provided between the first cut and the second cut.

(13) In the packaging material according to (11), the at least one fold may intersect a at least one cut and the outer shape line provided on the lid and provided on the body side having the lock tab.

(14) In the packaging material according any one of (1) to (13) may comprise an arm that is provided on the body, is connected to the lock tab, and is foldable in a direction intersecting the first direction.

(15) A blank sheet of the present disclosure is folded to assemble the packaging material according to any one of (1) to (14).

(16) A method of the present disclosure is a method for packaging an object with the packaging material according to any one of (1) to (14). the method comprises disposing the object in the packaging material and locking the lid. In the locking the lid, in a state where the lid is closed with respect to the body and the lock tab is disposed on the first main surface side, the lock tab is moved in the first direction. At least one of the lock tab or the through-hole is deformed and the lock tab is inserted into the through-hole. After the lock tab is inserted into the through-hole, the lock tab is disposed on the second main surface side.