Patent Description:
There has been conventionally proposed a packaging container in which a medical device is stored in a recess formed on a resin sheet and the recess is sealed with a flat sealing film such as a resin film (<CIT>). Such a packaging container is also called a blister package or a blister case, and is used for packaging of, for example, a prefilled syringe, a drug solution administration device used by attaching to a body, and the like.

In some medical devices, the function is impaired if the medical device is touched when taken out from the packaging container. However, in the current packaging container, the entire area around the recess of the sealing film can be opened with a uniform force, and the user can peel off the sealing film all at once. In this case, all the accommodated medical devices are exposed at a time, and the user can touch all the parts of the medical devices. Therefore, there is a risk that the user grasps the wrong part, which may deteriorate the function of the medical device.

In addition, the recent spread of home treatment has increased an opportunity for patients themselves to operate medical devices. There is a concern about an increase in erroneous handling when users unfamiliar with handling of the medical devices take out the medical devices from packaging containers. Also in some products other than medical devices, the function may deteriorate if an inappropriate part is touched when taken out from packaging containers.

Therefore, there is a demand for a packaging container in which the user can take out the stored object without touching a wrong part.

In order to solve this problem, the invention provides a packaging container according to independent claim <NUM>. The dependent claims relate to advantageous embodiments.

According to the packaging container of the invention the protection target portion is protected by providing the part surrounding the protection target portion of the stored object with a difficult-to-peel portion, which is difficult to peel off the sealing film, and hence it is possible to take out the stored object without the user touching a wrong portion.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Note that, for convenience of description, some dimension ratios in the drawings are exaggerated and different from actual ratios.

The packaging container <NUM> according to the present embodiment illustrated in <FIG> is used to accommodate a small drug solution administration device <NUM> (medical device) of a patch type to be attached to the body of a patient. The packaging container <NUM> has a container body <NUM> in which a recess <NUM> capable of accommodating the drug solution administration device <NUM> is formed on a transparent thick resin sheet, and a sealing film <NUM> stuck to the container body <NUM> and sealing the drug solution administration device <NUM> accommodated in the recess <NUM>. In the present embodiment, the drug solution administration device <NUM>, which is a type of medical devices, is described as a stored object accommodated in the packaging container <NUM>. However, the present invention is not limited thereto. The packaging container <NUM> may target various types of devices having portions that may deteriorate in function when touched such as various types of sensors and fragile structures (needle tubes).

As shown in <FIG>, the drug solution administration device <NUM> has a box-shaped housing <NUM>. The inside of the housing <NUM> is provided with a cylindrical body accommodating a drug solution, a pusher that sends out the drug solution, and a drive mechanism that drives the pusher. The drug solution administration device <NUM> is used for continuously or intermittently administering a drug solution into a living body for a relatively long time (e.g., about several minutes to several hours).

As shown in <FIG>, the housing <NUM> has a rectangular front surface 20a and a rear surface 20b, and four side surfaces 20c to 20f. The front surface 20a and the rear surface 20b are formed to have an area larger than the side surfaces 20c and 20d. The side surface 20c is protrusively provided with a connection port <NUM> for connecting a patch type needle tube or the like. The rear surface 20b of the housing <NUM> is provided with a power switch <NUM>. The power switch <NUM> is a switch for starting the administration operation of the drug solution administration device <NUM>, and is disposed facing the body of the patient after the power switch <NUM> is depressed.

A housing attachment material <NUM> is configured such that one joining surface 24a is joined to the housing <NUM> and the other adhesion surface 24b can be stuck to the skin. The housing attachment material <NUM> is formed to have a shape identical to or larger than the rear surface 20b of the drug solution administration device <NUM> in order to secure the peeling strength with the skin.

A protection sheet <NUM> is attached to the housing attachment material <NUM> in order to protect the adhesion surface 24b until immediately before the use and to prevent the adhesiveness of the adhesion surface 24b from deteriorating. The protection sheet <NUM> is formed in a shape covering the entire area of the adhesion surface 24b. The protection sheet <NUM> is removed from the housing attachment material <NUM> immediately before the use of the drug solution administration device <NUM>, and one end 28a (end on the side surface 20f side) of the protection sheet <NUM> is provided with a peeling start portion <NUM> separated from the housing attachment material <NUM>.

The peeling start portion <NUM> is formed integrally with the protection sheet <NUM>, and is formed as a portion where the protection sheet <NUM> bulges outward relative to the housing attachment material <NUM>. The peeling start portion <NUM> is separated from the adhesion surface 24b of the housing attachment material <NUM>, and is not in contact with the adhesion surface 24b. The user can easily peel the protection sheet <NUM> from the housing attachment material <NUM> by pinching the peeling start portion <NUM> and pulling the protection sheet <NUM> in the direction of peeling off the protection sheet <NUM> from the housing attachment material <NUM>.

The rear surface 20b of the housing <NUM> is provided with the power switch <NUM> for starting drive of the drug solution administration device <NUM>. The housing attachment material <NUM> and the protection sheet <NUM> in a part corresponding to the power switch <NUM> is provided with a circular notch hole <NUM> for enabling visual recognition and operation of the power switch <NUM>.

On the other hand, as shown in <FIG>, the container body <NUM> is provided with the recess <NUM>, a planar sticking portion <NUM> surrounding the periphery of the recess <NUM>, and an intermediate portion <NUM> formed between the recess <NUM> and the sticking portion <NUM>. The recess <NUM> has a body accommodation portion <NUM> that accommodates the housing <NUM> of the drug solution administration device <NUM> and a port accommodation portion <NUM> that accommodates the connection port <NUM>.

The body accommodation portion <NUM> is formed in a rectangular shape surrounded by four side surfaces 36a to 36d and a bottom surface 36e. The plane dimension of the body accommodation portion <NUM> is formed larger than the plane dimensions of the front surface 20a and the rear surface 20b of the housing <NUM>. The depth of the body accommodation portion <NUM> (the depth from the intermediate portion <NUM> to the bottom surface 36e) is formed larger than the thickness of the housing <NUM> (the distance between the front surface 20a and the rear surface 20b), and the entire housing <NUM> is accommodated in the body accommodation portion <NUM>.

The body accommodation portion <NUM> is provided with a plurality of protrusions <NUM> protruding from the side surfaces 36a and 36b and the bottom surface 36e toward the housing <NUM>. The housing <NUM> is retained in the body accommodation portion <NUM> by being held between four protrusions <NUM> protruding from the side surfaces 36a and 36b. The housing <NUM> is retained in a state of coming off from the side surfaces 36a and 36b and the bottom surface 36e by abutting on the protrusion <NUM>.

On the side surfaces 36a and 36b of the body accommodation portion <NUM>, grasping recesses <NUM> are formed so as to make it easy to pinch the housing <NUM> of the drug solution administration device <NUM> when the housing <NUM> is taken out of the container body <NUM>. The grasping recess <NUM> forms a gap into which the user can insert his fingertip. In a part other than the grasping recess <NUM>, the gap between the body accommodation portion <NUM> and the drug solution administration device <NUM> is formed to have a width in which the user's finger cannot be inserted.

The port accommodation portion <NUM> is formed in a part of the recess <NUM> where the side surface 20c of the housing <NUM> is disposed. The port accommodation portion <NUM> is formed in a shape larger than the connection port <NUM>, and the connection port <NUM> is accommodated in the port accommodation portion <NUM> in a state of being separated from the surface of the port accommodation portion <NUM>. In order to prevent the user from touching the connection port <NUM> and damaging the connection port <NUM> when taking out the drug solution administration device <NUM>, it is preferable that the gap between the port accommodation portion <NUM> and the connection port <NUM> has a width that does not allow the user's fingertip to enter.

The intermediate portion <NUM> is a part formed so as to surround the periphery of the recess <NUM>, and has a plane parallel to the sticking portion <NUM>. The inner peripheral edge of the intermediate portion <NUM> is connected to the recess <NUM>. The outer peripheral edge of the intermediate portion <NUM> is connected to the sticking portion <NUM> via a step portion 34a. The intermediate portion <NUM> is formed lower than the sticking portion <NUM> via the step portion 34a. The intermediate portion <NUM> forms a space that accommodates the housing attachment material <NUM> and the protection sheet <NUM> of the drug solution administration device <NUM> between the intermediate portion <NUM> and the sealing film <NUM>.

The sticking portion <NUM> is formed in a rectangular shape along the outer periphery of the container body <NUM>. The distance between the step portion 34a and an outer peripheral edge 32a, which is the width of the sticking portion <NUM>, is substantially constant throughout the entire circumference. A separation portion <NUM> is formed at an end of the sticking portion <NUM> on the port accommodation portion <NUM> side. The separation portion <NUM> is connected to the sticking portion <NUM> via the step portion 33a, and is formed at a position lower than the sticking portion <NUM>. The separation portion <NUM> is separated from the sealing film <NUM> when the sealing film <NUM> described later is bonded to the sticking portion <NUM>, and becomes a portion easily graspable of the sealing film <NUM> when the user starts peeling the sealing film <NUM>.

In the container body <NUM>, the recess <NUM>, the sticking portion <NUM>, and the intermediate portion <NUM> are integrally formed by the resin sheet. As the resin sheet, for example, a transparent sheet body made of PET resin can be used. In this case, the thickness of the resin sheet can be, for example, as thick as about <NUM>.

In the recess <NUM> of the container body <NUM>, the drug solution administration device <NUM> is accommodated with the front surface 20a of the housing <NUM> facing the bottom surface 36e of the recess <NUM>. The housing attachment material <NUM> and the protection sheet <NUM> of the drug solution administration device <NUM> are spread and accommodated in the intermediate portion <NUM> of the container body <NUM>. At this time, as shown in <FIG>, the peeling start portion <NUM> of the protection sheet <NUM> is disposed so as to extend to the intermediate portion <NUM> of the body accommodation portion <NUM> on the side surface 36d side.

The peeling start portion <NUM> of the protection sheet <NUM> is a portion easily peeled off when the drug solution administration device <NUM> is taken out from the packaging container <NUM>, and is a protection target portion that requires protection when the drug solution administration device <NUM> is opened. If the protection sheet <NUM> is peeled off at the time of opening, the adhesion surface 24b is not protected and the adhesive power is lowered, and there is a risk that the drug solution administration device <NUM> falls off from the patient's skin during use. The peeling start portion <NUM> is a portion that is likely to be pulled by the user when taking out the drug solution administration device <NUM> from the packaging container <NUM>. The protection sheet <NUM> is bonded to the housing attachment material <NUM> with a relatively weak bonding power. Hence, when the user pulls the peeling start portion <NUM>, the protection sheet <NUM> is peeled off before the drug solution administration device <NUM> is taken out of the packaging container <NUM>. Therefore, the peeling start portion <NUM> is a portion that needs protection when the drug solution administration device <NUM> is taken out of the packaging container <NUM>.

As shown in <FIG>, the sealing film <NUM> is formed in a rectangular shape having the dimensions same as the container body <NUM>. The sealing film <NUM> is made of, for example, a thin transparent film made of polyethylene resin or the like. The sealing film <NUM> is peelably bonded to the sticking portion <NUM> of the container body <NUM>.

As shown in <FIG>, the sealing film <NUM> extends along the sticking portion <NUM> and is bonded to the sticking portion <NUM> at a seal portion <NUM> formed so as to surround the entire periphery of the recess <NUM>. The seal portion <NUM> can be formed by sandwiching the sealing film <NUM> and the sticking portion <NUM> with a mold of a predetermined shape, locally heating, and fusing in a state where the sealing film <NUM> is superposed on the sticking portion <NUM>.

The seal portion <NUM> has a constant bonding power per unit area. However, the seal portion <NUM> of the present embodiment is provided with a difficult-to-peel portion <NUM> formed wide throughout the entire area of the width of the sticking portion <NUM> (the distance between the step portion 34a and the outer peripheral edge 32a), and an easy-to-peel portion <NUM> formed in linear patterns 48a and 48b having a width narrower than the width of the sticking portion <NUM>.

Since the difficult-to-peel portion <NUM> is bonded to the sticking portion <NUM> with a wide bonding area, the peelable portion is bonded by a bonding power higher than that of the easy-to-peel portion <NUM>, and the difficult-to-peel portion <NUM> is more difficult to peel compared with the easy-to-peel portion <NUM>. The difficult-to-peel portion <NUM> is formed in a C-shape along the sticking portion <NUM> of the part surrounding the peeling start portion <NUM> of the protection sheet <NUM> of the drug solution administration device <NUM>.

The easy-to-peel portion <NUM> is bonded to the sticking portion <NUM> with a width narrower than the width of the sticking portion <NUM>, has a smaller bonding area than that of the difficult-to-peel portion <NUM>, and is bonded by a relatively weak bonding power. Therefore, the easy-to-peel portion <NUM> can be peeled off more easily than the difficult-to-peel portion <NUM>. The easy-to-peel portion <NUM> includes the two parallel linear patterns 48a and 48b. The linear patterns 48a and 48b include a straight part 49a and a bent portion 49b connecting adjacent straight parts 49a.

Of the two linear patterns 48a and 48b, the linear pattern 48a is a pattern formed inside and the linear pattern 48b is a pattern formed outside. The two linear patterns 48a and 48b are disposed so as to be separated from each other with a gap of a fixed width so as not to affect the other even if one is peeled off. The width of each of the linear patterns 48a and 48b can be <NUM> to <NUM>, for example.

The bent portion 49b of the outer linear pattern 48b is formed with a bulging portion <NUM> curved and bulging outward in an arc shape. The bulging portion <NUM> is formed as a bonding part similar to the linear pattern 48b, but is a portion where tensile force acting on the sealing film <NUM> is locally concentrated when the sealing film <NUM> is peeled off from the edge of the packaging container <NUM>. Since the bulging portion <NUM> is curved in a circular arc shape, a part where tensile force is locally concentrated appears even when the sealing film <NUM> is pulled from various directions. Hence, it is possible to peel off the sealing film <NUM> more easily than in a case of not providing the bulging portion <NUM>.

The packaging container <NUM> of the present embodiment is configured as described above, and its operations will be described below.

The packaging container <NUM> of the present embodiment is provided to the user in a state where the drug solution administration device <NUM> is accommodated in the recess <NUM> of the container body <NUM>, and the recess <NUM> and the drug solution administration device <NUM> are sealed by the sealing film <NUM>.

The user opens the packaging container <NUM> immediately before use and takes out the drug solution administration device <NUM> from the container body <NUM>. When opening the packaging container <NUM>, first, an operation for peeling off the easy-to-peel portion <NUM> of the seal portion <NUM> of the sealing film <NUM> from the sticking portion <NUM> of the container body <NUM> is performed.

In the prior art, the entire area of the sealing film <NUM> is bonded with a uniform peeling strength, and hence the entire sealing film <NUM> can be peeled off at once. In this case, the entire area of the protection sheet <NUM> of the drug solution administration device <NUM> accommodated in the packaging container <NUM> is exposed. In this case, the peeling start portion <NUM> of the protection sheet <NUM> is exposed as a portion easy to pinch when pulling out the drug solution administration device <NUM>. Therefore, there is a risk that the user pulls the peeling start portion <NUM> in order to pull out the drug solution administration device <NUM> from the container body <NUM>. Since the protection sheet <NUM> can be peeled off from the housing attachment material <NUM> with a weak peeling strength, there is a risk that the protection sheet <NUM> is peeled off before the drug solution administration device <NUM> is taken out of the container body <NUM>, and the protection function of the adhesion surface 24b is impaired.

On the other hand, according to the packaging container <NUM> of the present embodiment, the seal portion <NUM>, by which the sealing film <NUM> is bonded to the sticking portion <NUM> of the container body <NUM>, is provided with the difficult-to-peel portion <NUM> and the easy-to-peel portion <NUM>. In the difficult-to-peel portion <NUM>, the sealing film <NUM> is bonded to the sticking portion <NUM> throughout the entire area in the width direction of the sticking portion <NUM>, and hence the difficult-to-peel portion <NUM> is bonded with a relatively strong peeling strength, and has no pinch margin of the sealing film <NUM> for starting peeling. Therefore, the user pinches the end of the sealing film <NUM> from the easy-to-peel portion <NUM> to start peeling of the sealing film <NUM>.

The separation portion <NUM> is provided at an end of the container body <NUM> on the side separated from the difficult-to-peel portion <NUM>. The separation portion <NUM> is separated from the sealing film <NUM> and coming off, and hence the user can easily grasp the sealing film <NUM>. Therefore, the packaging container <NUM> can prompt the user to start peeling the sealing film <NUM> from a part away from the difficult-to-peel portion <NUM>.

When the user pinches the end of the sealing film <NUM> and peels it off from the container body <NUM>, the easy-to-peel portion <NUM> of the sealing film <NUM> peels along the linear patterns 48a and 48b. The peeling of the sealing film <NUM> stops when the peeling proceeds to the difficult-to-peel portion <NUM>. In the difficult-to-peel portion <NUM>, since the sealing film <NUM> and the sticking portion <NUM> are bonded with a strong peeling strength, the peeling of the difficult-to-peel portion <NUM> does not proceed any more in normal operation. Therefore, the peeling of the sealing film <NUM> ends in a state where the sealing film <NUM> covers the peeling start portion <NUM> of the protection sheet <NUM> of the drug solution administration device <NUM>.

This can protect the peeling start portion <NUM>, which is a protection target portion of the drug solution administration device <NUM>. Note that even in a state where the sealing film <NUM> is not completely peeled off, the user can grasp the housing <NUM> of the drug solution administration device <NUM> through the grasping recess <NUM>, and hence the user can remove the drug solution administration device <NUM> from the recess <NUM> of the container body <NUM>.

The packaging container <NUM> of the present embodiment achieves the following effects.

The present embodiment relates to the packaging container <NUM> for accommodating the drug solution administration device <NUM> (medical device/stored object) having the peeling start portion <NUM> (protection target portion) to be avoided from contact when taken out and a graspable portion that can be grasped. The packaging container <NUM> has: the container body <NUM> having the recess <NUM> formed in a shape corresponding to the drug solution administration device <NUM> and accommodating the drug solution administration device <NUM>, and the sticking portion <NUM> formed in a plane shape in a part surrounding the periphery of the recess <NUM>; and the sealing film <NUM> peelably stuck to the sticking portion <NUM> and sealing the recess <NUM>, in which the sealing film <NUM> is bonded to the sticking portion <NUM> via the seal portion <NUM> extending along the periphery of the recess <NUM>, and the seal portion <NUM> has the difficult-to-peel portion <NUM> formed in the part surrounding the peeling start portion <NUM> (protection target portion) of the drug solution administration device <NUM> (medical device/stored object) accommodated in the recess <NUM>, and bonded with a strength relatively strong, and the easy-to-peel portion <NUM> formed in the part surrounding the graspable portion of the drug solution administration device <NUM> accommodated in the recess <NUM>, and bonded with a strength relatively weaker than that with the difficult-to-peel portion <NUM>.

According to the packaging container <NUM> described above, when the sealing film <NUM> is peeled to open the packaging container <NUM>, the peeling of the sealing film <NUM> is stopped by the difficult-to-peel portion <NUM>. Therefore, it is possible to maintain a state in which the sealing film <NUM> covers and protects the peeling start portion <NUM> of the drug solution administration device <NUM>. This can prevent the user from touching the peeling start portion <NUM> as a protection target portion when the user takes out the drug solution administration device <NUM> from the container body <NUM>.

In the packaging container <NUM> described above, the easy-to-peel portion <NUM> is formed as the thin linear patterns 48a and 48b, and the difficult-to-peel portion <NUM> may be formed on the entire surface of the sticking portion <NUM> in a part surrounding the peeling start portion <NUM> (protection target portion).

This, by separately producing the difficult-to-peel portion <NUM> and the easy-to-peel portion <NUM> in accordance with the shape of the seal portion <NUM>, it is possible to simultaneously produce them in one bonding process. This can reduce the number of manufacturing process, and the productivity is excellent.

In the packaging container <NUM> described above, the easy-to-peel portion <NUM> has the two parallel linear patterns 48a and 48b as the seal portion <NUM>. According to this configuration, even when the sealing film <NUM> is about to be peeled off due to an impact or the like, the peeling stops in any one of the linear patterns 48a and 48b, and hence the risk of unintended opening can be reduced.

In the packaging container <NUM> described above, the linear patterns 48a and 48b have the plurality of straight parts 49a and the bent portion 49b connecting the straight parts 49a, and the bent portion 49b of the linear pattern 48b may be formed with the bulging portion <NUM> curved and bulging outward. According to this configuration, since the load when the sealing film <NUM> is pulled in the peeling direction is concentrated on the bulging portion <NUM>, the peeling of the sealing film <NUM> can be started with a small force.

In the packaging container <NUM> described above, the bulging portion <NUM> may be provided in the bent portion 49b farthest apart from the difficult-to-peel portion <NUM>. This can start the peeling of the sealing film <NUM> from a part away from the difficult-to-peel portion <NUM>, and the peeling operation of the easy-to-peel portion <NUM> becomes easy.

The packaging container <NUM> described above may be provided with the separation portion <NUM> that extends from the sticking portion <NUM> in the vicinity of the bulging portion <NUM> and lowers in a direction away from the sealing film <NUM>. According to this configuration, when the sealing film <NUM> is peeled off, the user can easily grasp the sealing film <NUM>, and can easily peel off the sealing film <NUM>.

The stored object accommodated in the packaging container <NUM> is the drug solution administration device <NUM> used by attaching to the body, and the drug solution administration device <NUM> may have the box-shaped housing <NUM>, a housing attachment material <NUM> formed to have an outer shape larger than the housing <NUM> and having the adhesion surface 24b for attaching the housing <NUM> to the patient's body, and the protection sheet <NUM> covering the adhesion surface 24b of the housing attachment material <NUM> and having the peeling start portion <NUM> separated from the housing attachment material <NUM> at one end. The drug solution administration device <NUM> may be accommodated in the recess <NUM> of the container body <NUM> of the packaging container <NUM> in an orientation in which the protection sheet <NUM> faces the sealing film <NUM>, and the difficult-to-peel portion <NUM> may be formed in the sticking portion <NUM> of a part surrounding the peeling start portion <NUM> of the protection sheet <NUM>.

According to the above configuration, it is possible to protect the peeling start portion <NUM> of the protection sheet <NUM> when the drug solution administration device <NUM> is taken out from the container body <NUM>.

As shown in <FIG>, the packaging container <NUM> of the present embodiment is a container that packs a prefilled syringe <NUM> (medical device). The packaging container <NUM> includes a container body <NUM> made of a resin sheet and a sealing film <NUM> that seals the container body <NUM>. The container body <NUM> is made of a transparent thick resin sheet made of PET resin or the like, and a recess <NUM> formed by vacuum molding or the like is formed in the center part thereof. The recess <NUM> is formed in a shape corresponding to the prefilled syringe <NUM>, and the entire prefilled syringe <NUM> can be accommodated in the recess <NUM>. A planar sticking portion <NUM> for bonding the sealing film <NUM> is formed on the outer peripheral part of the container body <NUM>.

The sealing film <NUM> and the sticking portion <NUM> are peelably bonded to each other in a seal portion <NUM> having a predetermined shape. In the present embodiment, the tip of the prefilled syringe <NUM> is a protection target portion. Therefore, in the seal portion <NUM>, a difficult-to-peel portion <NUM> is formed in the sticking portion <NUM> in a part surrounding the tip of the prefilled syringe <NUM>, and an easy-to-peel portion <NUM> is formed at another part. The difficult-to-peel portion <NUM> is formed by bonding the sealing film <NUM> to the entire surface of the sticking portion <NUM> of the part surrounding the tip of the prefilled syringe <NUM>. The easy-to-peel portion <NUM> is formed as a linear pattern <NUM> with a thin width.

Also in the packaging container <NUM> of the present embodiment, the user can peel off the sealing film <NUM> from the easy-to-peel portion <NUM>. The peeling of the sealing film <NUM> by the user is stopped at the difficult-to-peel portion <NUM>. Thus, the sealing film <NUM> is kept in a state of covering the tip (protection target portion) of the prefilled syringe <NUM>. It is possible to prevent the user's hand from touching the tip of the prefilled syringe <NUM> when the user removes the prefilled syringe <NUM> from the container body <NUM>.

Claim 1:
A packaging container (<NUM>) for accommodating a stored object having a protection target portion to be avoided from contact when taken out and a graspable portion that can be grasped, the packaging container (<NUM>) comprising:
a container body (<NUM>) having a recess (<NUM>, <NUM>, <NUM>) formed in a shape corresponding to the stored object and configured to accommodate the stored object and a sticking portion (<NUM>) formed in a plane shape in a part surrounding a periphery of the recess (<NUM>); and
a sealing film (<NUM>) peelably stuck to the sticking portion (<NUM>) to seal the recess (<NUM>, <NUM>, <NUM>), wherein
the sealing film (<NUM>) is bonded to the sticking portion (<NUM>) via a seal portion (<NUM>) extending along a periphery of the recess (<NUM>), and
the seal portion (<NUM>) has
a difficult-to-peel portion (<NUM>, <NUM>) formed in a part surrounding a part of the recess foreseen for the protection target portion of the stored object to be accommodated in the recess (<NUM>, <NUM>, <NUM>), and bonded with a strength relatively strong, and
an easy-to-peel portion (<NUM>, <NUM>) formed in a part surrounding a part of the recess foreseen for the graspable portion of the stored object to be accommodated in the recess (<NUM>, <NUM>, <NUM>), and bonded with a strength relatively weaker than that with the difficult-to-peel portion (<NUM>, <NUM>),
characterized in that
the easy-to-peel portion (<NUM>, <NUM>) has two parallel linear patterns (48a, 48b) as the seal portion (<NUM>).