Opening detection sheets, packaging materials

Abstract

To provide an opening detection sheet which can suppress error breaking, and a packaging material comprising the same.SOLUTION: An opening detection sheet 30, which is bonded to a packaging material 20 having a plurality of storage parts 22, comprises: a base material layer 31; and a circuit pattern 32 which is provided on the base material layer 31, and has a plurality of wiring paths 32A to 32J. The plurality of wiring paths 32A to 32J is provided for each storage part 22, and on one end side of each of the wiring paths 32A to 32J, a first terminal part 32Z1 connected to external equipment is provided. The first terminal part 32Z1 is provided at the same position in different wiring paths 32A to 32J.SELECTED DRAWING: Figure 18

Description

[Technical Field]

[0001] The present technology relates to an opening detection sheet and a packaging material. [Background technology]

[0002] Conventionally, in a packaging material (for example, a press-through package (PTP)) having a storage section for storing tablets or the like, there is known a technology for detecting whether the storage section has been opened, and one example of this is disclosed in Patent Document 1. The packaging material described in Patent Document 1 has a plurality of storage sections and an opening detection sheet on which a circuit pattern is formed. When the contained items are removed from the storage sections, the circuit pattern on the opening detection sheet is broken, and this break is detected by an external opening detector, thereby detecting whether the storage section has been opened. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-189636 Summary of the Invention [Problem to be solved by the invention]

[0004] The circuit pattern of the tamper detection sheet is formed so that a different wiring path is used for each storage compartment, enabling tamper detection for each storage compartment. Therefore, the more storage compartments there are, the greater the number of wiring paths in the circuit pattern. For example, a PTP for tablets generally has 10 or more storage compartments, so 10 or more wiring paths are required for the circuit pattern. However, increasing the number of wiring paths makes it easier for other wiring paths that are not used to detect the tampering of a storage compartment to be accidentally broken when the storage compartment is opened. On the other hand, if the spacing between the wiring paths is increased to prevent erroneous breakage, the planar size of the tamper detection sheet must be increased.

[0005] The present technology was developed based on the above-described circumstances, and aims to realize an opening detection sheet that can prevent accidental tearing, and a packaging material that includes the same. [Means for solving the problem]

[0006] The means for solving the above problems are as follows.

[0007] <1> An opening detection sheet that is attached to a packaging material having a plurality of storage sections, comprising a base layer and a circuit pattern provided on the base layer and having a plurality of wiring paths, the plurality of wiring paths being provided for each of the storage sections, and a first terminal portion that is connected to an external device being provided on one end side of each of the wiring paths, the first terminal portion being provided at the same position on different of the wiring paths.

[0008] <2> The wiring paths extend from the first terminal portion in a predetermined direction, and include a common wiring path that is the same path among different wiring paths. <1> The tamper detection sheet described in .

[0009] <3> The first terminal portion is provided at the same position for all of the wiring paths, and the common wiring path is the same path for all of the wiring paths. <2> The tamper detection sheet described in

[0010] <4> A second terminal portion to be connected to an external device is provided on the other end side of each of the wiring paths, and the second terminal portion is provided for each of the wiring paths. <1> from <3> An opening detection sheet according to any one of the above.

[0011] <5> The second terminal portion is provided at a different position for each of the wiring paths. <4> The tamper detection sheet described in

[0012] <6> The base material layer has a rectangular shape in a plan view, and the first terminal portion and the second terminal portion are provided on one side of the rectangular shape. <4> or <5> The tamper detection sheet described in

[0013] <7> The base material layer has an elongated rectangular shape, and the first terminal portion and the second terminal portion are provided on one short side of the rectangular shape. <4> from <6> An opening detection sheet according to any one of the above.

[0014] <8> The length of the wiring path is such that the wiring path provided in the housing section has a greater distance from the one short side. <7> The tamper detection sheet described in

[0015] <9> Each of the wiring paths is substantially U-shaped from the first terminal portion to the second terminal portion. <7> or <8> The tamper detection sheet described in

[0016] <10> a cover member that seals the storage portion; and a cover member that is attached to the cover member. <1> from <9> and an opening detection sheet according to any one of the preceding items, wherein an item contained in the storage section can be removed by pushing and tearing the lid and the opening detection sheet.

[0017] <11> Each of the wiring paths overlaps with the center of any one of the plurality of housing portions in a plan view. <10> The packaging material described in [Effects of the Invention]

[0018] According to the present technology, it is possible to realize an opening detection sheet that can prevent accidental tearing, and a packaging material including the same. [Brief explanation of the drawings]

[0019] [Figure 1] Schematic diagram of an opening management system according to the first embodiment. [Figure 2] A perspective view of an opening detector attached to a packaging material [Figure 3] Perspective view of the tamper detector [Figure 4] Perspective view of the internal components of the tamper detector [Figure 5] A perspective view of the opening detector in which the second housing is displaced upward. [Figure 6] Enlarged perspective view of the right part of the first housing [Figure 7] Cross section of line II in Figure 3 [Figure 8] Cross section of line II-II in Figure 5 [Figure 9] Bottom view of the tamper detector [Figure 10] Perspective view of the tamper detector [Figure 11] A perspective view of the opening detector in which the second housing is displaced upward. [Figure 12] FIG. 12 is an enlarged perspective view of the first protrusion and the second protrusion of FIG. 11 ; [Figure 13] Exploded perspective view of packaging material [Figure 14] Cross-sectional view of the main body of the packaging material (cross-sectional view taken along line III-III in Figure 13) [Figure 15] Plan view of the tamper detection sheet [Figure 16] Plan view of the tamper detection sheet [Figure 17] Cross section of line IV-IV in Figure 15 [Figure 18] Plan view of packaging material [Figure 19] Enlarged plan view of the upper left corner of Figure 18 [Figure 20] Cross section of line VV in Figure 19 [Figure 21] An enlarged perspective view showing the packaging being opened. [Figure 22] FIG. 10 is a plan view showing a break line according to a comparative example. [Figure 23A] Flowchart showing the processing of the opening management system [Figure 23B] Flowchart showing the processing of the opening management system [Figure 24A] Flowchart showing the processing of the opening management system [Figure 24B] Flowchart showing the processing of the opening management system [Figure 25] Schematic diagram of an opening management system according to a second embodiment. [Figure 26] 10 is a plan view of a packaging material according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] <Embodiment 1> An opening management system 10 according to a first embodiment will be described with reference to Figs. 1 to 24B. Some of the figures show X-axis, Y-axis, and Z-axis, and are drawn so that each axial direction is a common direction in each figure. The directions along the X-axis, Y-axis, and Z-axis are defined as the left-right direction, the front-rear direction, and the up-down direction, respectively. However, these directions are merely defined for convenience and should not be interpreted in a limiting sense.

[0021] The opening management system 10 is a system for managing the administration of a tablet drug T (an example of a contained item) based on the opening state of a packaging material 20 that contains the drug T. In this embodiment, an opening management system for drugs is exemplified as the opening management system 10, but the contained items may be items other than the drug T, and the opening management system 10 is widely applicable to the opening management of packaging materials. As shown in FIG. 1 , the opening management system 10 includes an opening detector 40 attached to the packaging material 20, a management server (application server) 60, and an information processing terminal 70. The management server 60 and the information processing terminal 70 are connected to a communication network 80.

[0022] As shown in FIG. 1 , one opening detector 40 is attached to each packaging material 20. The opening detector 40 is connected to a communication network 80 via low-power wide-area (LPWA) wireless communication. LPWA is a wireless communication technology that achieves long-distance transmission while reducing power consumption (e.g., a transmission distance of 10 km or more with a transmission power of 1 W or less) and is also known as a fundamental technology for the Internet of Things (IoT). LPWA communication services are provided by multiple communication carriers, such as Sigfox (registered trademark), LoRa (registered trademark), and NB-IoT. The opening detector 40 is wirelessly connected to an LPWA base station 85, which is connected to an LPWA communication server (LPWA cloud server) 86. The communication server 86 is also connected to the communication network 80. Therefore, the opening detector 40 can communicate with a management server 60 connected to the communication network 80 via the communication server 86. Each opening detector 40 has unique ID information, and the management server 60 can communicate with each opening detector 40.

[0023] The opening detector 40 only needs to be communicatively connected to at least one of the management server 60 and the information processing terminal 70, and a communication technology other than LPWA may be adopted as the communication means of the opening detector 40. For example, a low-power wireless communication technology such as BLE (Bluetooth Low Energy (registered trademark)) is preferable, but more common technologies such as Wi-Fi and LTE may also be used.

[0024] As shown in FIG. 1 , the information processing terminal 70 is a general-purpose information processing device such as a smartphone or computer. The information processing terminal 70 is intended for use by patients and medical professionals at hospitals or pharmacies that prescribe the drug T, but the user is not particularly limited (hereinafter, the user of the information processing terminal 70 will be simply referred to as the user). Multiple information processing terminals 70 may be provided, each used by a different user. The information processing terminal 70 executes a program that allows the user to input registration information such as the time of taking the drug T and to display the opening status of the drug T. In this embodiment, the program is installed on the information processing terminal 70 as application software (hereinafter, referred to as an app). However, the program may not be installed and may be executed via browser software, for example. The information processing terminal 70 embodies the input means and display means of the opening management system 10, thereby eliminating the need for these functions in the opening detector 40. This allows the opening detector 40 to be miniaturized and its power consumption to be reduced.

[0025] The management server 60 provides information and processing results in response to requests from the information processing terminal 70 or the opening detector 40. The management server 60 refers to a means for realizing server functions that executes programs that realize these functions. In this embodiment, the management server 60 is exemplified as a server computer as shown in FIG. 1, but it may also be a server that exists virtually in a network space using distributed computing or the like. The management server 60 may also perform processing using artificial intelligence.

[0026] 1, the management server 60 includes at least a communication unit 61 for connecting to the communication network 80, and an information generation unit 62. The management server 60 is capable of communicating with the information processing terminal 70 via the communication unit 61, and is also capable of communicating with the opening detector 40 via the communication server 86. The information generation unit 62 generates setting information for causing the opening detector 40 to perform predetermined processing related to opening detection based on the registration information from the information processing terminal 70. The processing of the management server 60 will be described in detail below.

[0027] 2 to 4, the opening detector 40 includes a plurality of (12 in this embodiment) connection units 41, an LPWA communication module 42, an LED 45 (an example of a notification unit), a reset button 46 (an example of an operation unit), a rechargeable battery 47 (an example of a power supply unit), a circuit board 49, and a housing 50. The circuit board 49 is mounted with the connection units 41, the communication module 42, the LED 45, the reset button 46, and a connector insertion portion 37A for connecting an external power source to the rechargeable battery 47. The housing 50 houses the circuit board 49 on which the various units are mounted, and the rechargeable battery 47, and also serves as an attachment portion that detachably clamps and holds the packaging material 20.

[0028] As shown in Fig. 4, the connection portion 41 includes a support 41A and a contact 41B. The support 41A is mounted on a substrate 49 and is generally cylindrical in this embodiment, but the shape is not limited thereto. The contact 41B protrudes upward from the upper surface of the support 41A (the surface opposite the substrate 49), and at least the protruding end thereof is conductive. When the packaging material 20 is attached to the opening detector 40 (Fig. 2), the contact 41B comes into contact with a circuit pattern 32 (described later) of the packaging material 20, and becomes conductive.

[0029] 4, the communication module 42 includes a communication unit 43 (specifically, an antenna), a control unit 44 (specifically, a microcomputer), and a storage unit 48 (specifically, a ROM and a RAM). The communication unit 43 is wirelessly connected to a base station 85 and can communicate with the management server 60 via a communication server 86. The storage unit 48 stores a control program for the opening detector 40, ID information, etc.

[0030] The control unit 44 controls each unit of the opening detector 40 based on the control program in the storage unit 48 and setting information transmitted from the management server 60. The control unit 44 also includes a timer with a timekeeping function, and also serves as a detection unit that detects whether the packaging material 20 has been opened. The control unit (detection unit) 44 passes a current through the connection unit 41 and detects the voltage generated in the circuit pattern 32 of the packaging material 20. The control unit 44 then compares the detected voltage value with a predetermined threshold value, and if the detected voltage value is equal to or less than the threshold value, determines that the circuit pattern 32 is not broken and is in an unopened state, and if the detected voltage value is greater than the threshold value, determines that the circuit pattern 32 is broken and is in an opened state. The control unit 44 may determine the opening state based on the resistance value of the circuit pattern 32, which changes due to the break, or may determine the opening state based on the current value when a predetermined voltage is applied.

[0031] The LED 45 lights up (blinks) in a predetermined pattern when the detection result (determination result) of the control unit 44 is an unopened state, thereby notifying the user of a missed dose. The LED 45 also lights up when the opening detector 40 is connected to an external power source, etc. The LED 45 is built into the housing 50, and the light emitted from the LED 45 is transmitted through the housing 50. More specifically, the housing 50 is formed of a material and with a thickness that allows the light emitted from the LED 45 to transmit through. The LED 45 is merely one example of a notification unit, and the notification unit may be a light-emitting means other than an LED, a sound-generating means such as a buzzer, a display means that displays a message, or a combination of these.

[0032] The housing 50 is made of a resin material and has a rounded, horizontally elongated rectangular parallelepiped shape as shown in FIGS. 3 and 5 . The housing 50 includes a first housing 51 and a second housing 52. The first housing 51 occupies the majority of the housing 50 and has a recessed upper front portion. The second housing 52 is a lid that covers the recessed upper front portion of the first housing 51. The second housing 52 is attached to the first housing 51 so as to be displaceable in the vertical direction (Z-axis direction). As the second housing 52 displaces, the packaging material 20 is sandwiched and held between the first housing 51 and the second housing 52, as shown in FIG. 2 . In other words, the housing 50 has a clamping structure consisting of the first housing 51 and the second housing 52 as an attachment portion for the packaging material 20. Each part of the housing 50 will be described in detail below. However, except for FIG. 2 , the packaging material 20 is not shown in order to clearly show the structure of the housing 50.

[0033] As shown in Figures 5 to 8, the first housing 51 has a tray-shaped bottom 51A that opens upward, and an upper part 51B that covers the opening of the bottom 51A from above. The bottom 51A houses a rechargeable battery 47, and a board 49 is placed on the rechargeable battery 47. The board 49 is covered from above by the upper part 51B. The upper part 51B is provided with a through-hole 51B1 through which the connection part 41 attached to the board 49 passes, and the contact 41B of the connection part 41 protrudes from the through-hole 51B1 and is exposed to the outside (Figures 6 and 11).

[0034] As shown in FIGS. 7 to 9, the bottom 51A of the first housing 51 is provided with two first communication holes 51C that respectively communicate with two engagement portions 52B of the second housing 52 (described later). The first communication holes 51C are provided so as to overlap the engagement portions 52B in a plan view. Furthermore, a portion of the opening edge of the first communication holes 51C of the bottom 51A of the first housing 51 protrudes upward, and a protrusion 51A1 is formed on the protruding end. The protrusion 51A1 engages (fits) with a convex portion 52B1 of the engagement portion 52B of the second housing 52 (FIGS. 7 and 8).

[0035] 5, an alignment mark 51A2 (an example of an alignment portion) is provided on the front surface of the bottom 51A. In this embodiment, the alignment mark 51A2 is formed as a convex portion at the center in the left-right direction (X-axis direction) on the front surface of the bottom 51A. The alignment mark 51A2 serves as an index for aligning with a predetermined position on the packaging material 20 (for example, an end 32A of the circuit pattern 32 of the packaging material 20). This makes it easier to align the packaging material 20 when attaching it to the opening detector 40, and ensures that the circuit pattern 32 of the packaging material 20 and the contactor 41B of the opening detector 40 come into reliable contact and are electrically conductive.

[0036] 5, an insertion hole 51D for inserting a connector into the connector insertion portion 37A is provided on the right side of the first housing 51, and a second communication hole 51E that communicates with the space in which the reset button 46 is located is provided on the back side of the first housing 51, as shown in Fig. 10. By inserting an operating pin or the like from the outside into the second communication hole 51E and pressing the reset button 46, it is possible to cause the control unit 44 to perform a reset process that returns the control unit 44 to its initial state.

[0037] As shown in FIGS. 7 and 8, 11, and 12, the second housing 52 includes a cover 52A, two engaging portions 52B, two first protrusions 52C, and a second protrusion 52D. The cover 52A extends above the exposed portion of the contacts 41B. The cover 52A includes a ceiling wall 52A1 that covers the contacts 41B from above and a right side wall 52A2 (another example of an alignment portion) that covers the contacts 41B from the right. The cover 52A does not cover the contacts 41B from the front or left, but has a substantially L-shaped opening 52A3 that opens to the front and left. By providing the right side wall 52A2 and the opening 52A3 in the cover 52A, when attaching the packaging material 20, the packaging material 20 can be inserted through the opening 52A3 and aligned in a state where it abuts against the right side wall 52A2. Furthermore, the left side of the lid portion 52A is open by the opening 52A3, so that it can be used for packaging materials 20 of different sizes (lengths in the short side direction).

[0038] As shown in FIGS. 7 and 8, the engaging portion 52B extends downward from the cover portion 52A and engages (fits) with the bottom portion 51A of the first housing 51. A protrusion 52B1 is formed on the extending end of the engaging portion 52B, and the protrusion 52B1 is adapted to engage with the protrusion 51A1 of the bottom portion 51A. When the protrusion 52B1 of the engaging portion 52B is positioned below the protrusion 51A1 (FIG. 7, hereinafter referred to as the first position), the second housing 52 is in a state where it is displaced downward, and the packaging material 20 is sandwiched and held between the first housing 51 and the second housing 52. On the other hand, when the protrusion 52B1 of the engaging portion 52B is positioned above the protrusion 51A1 (FIG. 8, hereinafter referred to as the second position), the second housing 52 is in a state where it is displaced upward, and the packaging material 20 is not held between the first housing 51 and the second housing 52. The engaging portion 52B engages with and is connected to the bottom portion 51A of the first housing 51 in both the first position and the second position.

[0039] When the cover portion 52A is pushed downward from above, the protrusion 52B1 of the engaging portion 52B slides downward from above the projection 51A1, displacing the engaging portion 52B from the second position to the first position. Furthermore, when an operating pin or the like is inserted through the first communicating hole 51C from the outside and the protrusion 52B1 is operated with the operating pin or the like, the engaging portion 52B is displaced from the first position to the second position. More specifically, as shown in FIG. 9, the opening detector 40 is positioned so that the bottom 51A faces upward. In this state, an operating pin or the like is inserted through the first communicating hole 51C from the outside, and the protrusion 52B1 is pushed downward (toward the upper portion 51B) while moving the protrusion 52B1 left and right (for example, in the direction of the hollow arrows in FIG. 7). This causes the protrusion 52B1 to slide along the inclined surface 51A1S of the projection 51A1. This allows the engaging portion 52B to easily displace from the first position to the second position. In this way, to change the packaging material 20 from the clamped state (first position) to the non-clamped state (second position), it is necessary to move the protrusion 52B1 using an operating pin or the like. Direct operation by hand or the like is not possible, making it easier to prevent erroneous operation. Furthermore, in the clamped state, the packaging material 20 can be held more stably. Furthermore, in the non-clamped state (second position), the inclined surface 51A1S of the protrusion 51A1 is covered by the protrusion 52B1. Therefore, it is difficult to completely remove the second housing 52 from the first housing 51 by displacing the protrusion 52B1 from the outside using an operating pin or the like. This allows the second housing 52 to be displaceable in the vertical direction (Z-axis direction) relative to the first housing 51, but is connected so as not to be completely removed. The communication of the first communication hole 51C with the engaging portion 52B means that the first communication hole 51C is connected to the space (first position) in which the engaging portion 52B exists in the clamped state.

[0040] The first protrusion 52C is made of a flexible soft material and is provided so as to protrude downward from the lid portion 52A as shown in Figures 11 and 12. The first protrusion 52C has a horizontally elongated rectangular parallelepiped shape and two first protrusions 52C are provided with a gap in the left-right direction (X-axis direction). The second protrusion 52D is made of a hard material and has a rod shape with a tapered tip and is provided between the two second protrusions 52D. When the packaging material 20 is attached to the opening detector 40 (Figure 2), the protruding surface (lower surface) of the first protrusion 52C and the tip of the second protrusion 52D are pressed against the surface of the main body 21 of the packaging material 20.

[0041] The provision of the first protrusion 52C and the second protrusion 52D improves the holding force when sandwiching and holding the packaging material 20. The first protrusion 52C and the second protrusion 52D do not contact the circuit pattern 32 of the packaging material 20 and are non-conductive, thereby improving the holding force while not affecting the opening detection. Note that the material and shape of the first protrusion 52C and the second protrusion 52D can be changed as appropriate as long as they can improve the holding force by providing an anti-slip effect, and they may be made of, for example, an elastic material, an adhesive material, a high-friction material, etc. Also, only one of the first protrusion 52C and the second protrusion 52D may be provided, rather than both.

[0042] According to the housing 50 having the above-described configuration, the opening detector 40 and the packaging material 20 can be easily and firmly attached without using a separate fastener. In addition, the displacement of the second housing 52 makes it easy to realize the attachment / detachment function.

[0043] Next, the packaging material 20 will be described in detail with reference to FIGS. 13 to 22. As shown in FIG. 13, the packaging material 20 comprises a main body 21 that accommodates a tablet drug T, and an opening detection sheet 30 attached to the main body 21. The main body 21 is a PTP (press-through package), and as shown in FIG. 14, comprises a sheet-like container 23 having a storage section 22 that accommodates the drug T, and a lid member 24. The lid member 24 is attached to the sheet-like container 23 to cover an opening 22A of the storage section 22, sealing the storage section 22. The main body 21 has a rectangular (oblong) planar shape, and the opening detection sheet 30 also has a similar planar shape. The planar size of the opening detection sheet 30 is large enough to cover the entire main body 21, and in this embodiment, the planar sizes of the two sheets are substantially the same.

[0044] As shown in FIGS. 13 and 14 , the sheet-like container 23 has a plurality of recessed storage sections 22 formed on the side opposite the lid member 24. The sheet-like container 23 is formed by processing a flat sheet made of resin or the like into a predetermined shape. The planar shape of each storage section 22 follows the shape of the drug T. In this embodiment, each storage section 22 is circular in plan view, and a total of ten storage sections 22 are formed, with five storage sections 22 arranged at predetermined intervals in the longitudinal direction (Y-axis direction) and two storage sections 22 arranged at predetermined intervals in the lateral direction (X-axis direction). Furthermore, the five storage sections 22 arranged in the longitudinal direction are formed near one short side 23A of the sheet-like container 23. As a result, a margin area 23S that is wider is formed between the other short side 23B of the sheet-like container 23 and the storage sections 22 than between one short side 23A and the storage sections 22. In known PTPs, the blank area 23S is generally used to print the name of the drug T or the like, or as a gripping area.

[0045] The lid material 24 is a flat sheet-like member made of a press-through material. The lid material 24 is bonded to the sheet-like container 23 except for the portion covering the opening 22A of the storage section 22. As shown in FIG. 14 , the lid material 24 is configured, for example, by laminating a heat-sealable adhesive layer 25, an aluminum foil 26, and an overcoat layer 28 in this order from the sheet-like container 23 side, but the layer configuration is not limited thereto. The heat-sealable adhesive layer 25 is made of a known thermal adhesive for PTPs and bonds the aluminum foil 26 to the sheet-like container 23. The overcoat layer 28 is a protective layer made of transparent resin and protects the aluminum foil 26.

[0046] 13, by peeling off the release paper 50, the opening detection sheet 30 is attached to the main surface of the lid member 24, exposing an adhesive layer 38 (described later) of the opening detection sheet 30. By providing the release paper 50, the opening detection sheet 30 can be stored and distributed as a single unit (separate body) before being attached to the main body 21.

[0047] As shown in Figures 15 to 17, the tamper detection sheet 30 is a sheet-like composite material in which a base layer 31, a circuit pattern 32, and a protective layer 33 are laminated. The base layer 31 is a laminate in which an adhesive layer 38, a metal layer 37, and an insulating layer 36 are laminated in this order from the side of the main body 21, but the layer configuration is not limited as long as the surface in contact with the circuit pattern 32 is insulating. The adhesive layer 38 is an adhesive or adhesive tape made of, for example, an acrylic, urethane, silicone, or rubber material, and adheres to the lid member 24 of the main body 21. The metal layer 37 is, for example, aluminum foil. The insulating layer 36 is made of a resin such as PET (polyethylene terephthalate), polystyrene, polyurethane, polypropylene, or polyimide.

[0048] As shown in FIGS. 15 and 17 , the circuit pattern 32 is a plurality of wiring patterns formed by printing a conductive ink or the like on the base layer 31. The circuit pattern 32 is formed, for example, by supplying a conductive ink in a predetermined pattern shape to the surface of the base layer 31 and then curing it. The conductive ink is a conductive composition in which conductive particles are dispersed in a vehicle containing a binder. For example, various particles made of materials exhibiting good conductivity, such as gold, silver, copper, platinum, aluminum, and alloys thereof, as well as carbon black, are used. The conductive ink can be supplied by various printing methods, such as supplying using a dispenser, gravure printing, and inkjet printing. The conductive composition can be cured by a drying curing method, a heat curing method, or the like, depending on the type of conductive ink used.

[0049] 13, the circuit pattern 32 is a wiring pattern including wiring paths in the same number as the number of the accommodation sections 22. In this embodiment, the circuit pattern 32 includes ten wiring paths 32A, 32B, 32C, 32D, 32E, 32F, 32G, 32H, 32I, and 32J (hereinafter referred to as 32A-32J). Each of the wiring paths 32A-32J is provided for each accommodation section 22 so that each accommodation section 22 has a different path.

[0050] 15, both ends of each of the wiring paths 32A-32J are provided on one side (the short side 31B side) of the two short sides 31A, 31B of the base layer 31. The short side 31B is the short side on which the marginal area 23S of the sheet-like container 23 of the main body 21 is formed, and both ends of each of the wiring paths 32A-32J are formed in an area of ​​the base layer 31 that overlaps with the marginal area 23S in a plan view. Terminal portions that come into contact with and are connected to contactors 41B of the opening detector 40 are provided at both ends of each of the wiring paths 32A-32J. More specifically, a first terminal portion 32Z1 is provided at one end of each wiring path 32A-32J, and second terminal portions 32A1, 32B1, 32C1, 32D1, 32E1, 32F1, 32G1, 32H1, 32I1, and 32J1 (hereinafter referred to as 32A1-32J1) are provided at the other end.

[0051] The first terminal 32Z1 is provided at the same position for all of the wiring paths 32A-32J and is a terminal common to all of the wiring paths 32A-32J. The first terminal 32Z1 is connected to one of the contacts 41B, and a predetermined reference potential (specifically, GND potential) is supplied from the contact 41B. The second terminals 32A1-32J1 are provided at different positions for each of the wiring paths 32A-32J. Each of the second terminals 32A1-32J1 is connected to one of the contacts 41B, and a predetermined potential is supplied from the contact 41B. When a predetermined potential difference occurs between the first terminal 32Z1 and the second terminals 32A1-32J1 (when a voltage is applied), a current flows through each of the wiring paths 32A-32J.

[0052] 15, each of the wiring paths 32A-32J is formed to connect the first terminal portion 32Z1 and the second terminal portions 32A1-32J1 in a substantially U-shape. More specifically, each of the wiring paths 32A-32J extends longitudinally from the first terminal portion 32Z1 through substantially the center in the short direction of the base layer 31, then bends in the short direction, branches, and bends again to form a U-shape leading to each of the second terminal portions 32A1-32J1 along the long side 31C or 31D of the base layer 31. The lengths of the wiring paths 32A-32J are greater for wiring paths 32A-32J provided in accommodation portions 22 that are farther away from the short side 31B of the base layer 31.

[0053] Each of the wiring paths 32A-32J includes a common wiring path 32Z and overlapping wiring paths 32A2, 32B2, 32C2, 32D2, 32E2, 32F2, 32G2, 32H2, 32I2, and 32J2 (hereinafter referred to as 32A2-32J2). The common wiring path 32Z is ​​the same for all of the wiring paths 32A-32J, is provided at approximately the center in the short-side direction of the base layer 31, and extends from the first terminal portion 32Z1 along the long-side direction of the base layer 31. By providing the common wiring path 32Z, a portion of the wiring paths 32A-32J can be shared, making it easier to layout the circuit pattern 32 more compactly.

[0054] Each of the overlapping wiring paths 32A2-32J2 extends along the short side direction of the base layer 31 and has a different path for each storage section 22. As shown in FIG. 18, each of the overlapping wiring paths 32A2-32J2 is formed to overlap with the opening 22A of each storage section 22 in a planar view. As a result, when the drug T is pushed out of the storage section 22, the opening detection sheet 30 is broken together with the lid material 24, as shown in FIG. 21, and the overlapping wiring paths 32A2-32J2 are torn. Furthermore, each of the overlapping wiring paths 32A2-32J2 preferably passes through a position that overlaps with the center 22A1 of the opening 22A of the storage section 22 (i.e., the center 22A1 of the storage section 22 in a planar view) in a planar view. This ensures that the overlapping wiring paths 32A2-32J2 are torn more reliably when the opening detection sheet 30 is broken.

[0055] According to the circuit pattern 32 described above, even when the number of storage sections 22 is as large as 10 as in this embodiment, it is possible to realize an opening detection sheet 30 in which the wiring paths 32A-32J can be broken for each storage section 22 without increasing the planar size of the opening detection sheet 30, while maintaining substantially the same size as the planar size of the main body section 21. Furthermore, when opening a storage section 22, it is possible to prevent a situation in which a wiring path other than that for opening detection of that storage section 22 is accidentally broken.

[0056] The protective layer 33 is formed of an insulating material and covers and protects the circuit pattern 32, as shown in FIG. 17. In this embodiment, the protective layer 33 is formed by printing a mat-on-printing (MOP) transparent resin material having a non-glossy finish. However, the material and method of formation are not limited as long as the protective layer 33 has insulating properties. The protective layer 33 is printed on the main surface of the base layer 31, covering the areas other than the first terminal portion 32Z1 and the second terminal portions 32A1-32J1 of each wiring path 32A-32J. Therefore, the protective layer 33 does not cover the first terminal portion 32Z1 and the second terminal portions 32A1-32J1. When the packaging material 20 is attached to the opening detector 40 (FIG. 2), the terminal portions 32Z1, 32A1-32J1 come into contact with the contacts 41B of the opening detector 40 and are electrically connected.

[0057] 15 to 19, the opening detection sheet 30 is provided with a plurality of break lines 39 to assist in breaking the overlapping wiring paths 32A2-32J2 of the wiring paths 32A-32J. Each break line 39 is provided for each overlapping wiring path 32A2-32J2 (and thus for each storage section 22). In this embodiment, four break lines 39 are provided for each storage section 22 so as to surround the center 22A1 of the storage section 22, but the number is not limited to four.

[0058] As shown in FIG. 19 , the break lines 39 extend longitudinally as a whole so that the overlapping wiring paths 32A2-32J2 are cut along the longitudinal direction. The break lines 39 do not overlap the overlapping wiring paths 32A2-32J2 in a plan view, and two break lines 39 are arranged opposite each other with the overlapping wiring paths 32A2-32J2 sandwiched between them. The break lines 39 are curved, and at least one end 39A is curved toward the center 22A1 of the storage section 22. It is preferable that at least a portion of the break line 39 is formed so as to overlap, in a plan view, with a position that the drug T comes into contact with when the drug T is extruded. In this way, a portion of the break line 39 is reliably pressed by the extruded drug T, enhancing the effect of assisting breaking.

[0059] 17 and 20, the fracture lines 39 are through-holes (slits) that penetrate the base material layer 31, the protective layer 33, and the adhesive layer 38, but they do not have to penetrate all of these layers. The fracture lines 39 may be formed in a groove shape, such as a so-called half slit, so that the thickness of the base material layer 31, the protective layer 33, and the adhesive layer 38 in the layer direction (Z-axis direction) is smaller than other parts. Furthermore, the fracture lines 39 do not have to be formed entirely as through-holes or half slits, and may be formed, for example, in a perforated (dotted) line shape so that a through-hole or half slit is partially included.

[0060] The above-described break lines 39 ensure that the overlapping wiring paths 32A2-32J2 are broken more reliably when the drug T is pushed out of the container 22, as shown in FIG. 21 . Furthermore, because the end 39A of each break line 39 is curved toward the center 22A1 of the container 22, it is possible to prevent the erroneous rupture of the wiring paths 32A-32J for opening detection in another container 22 when the lid member 24 and the opening detection sheet 30 are pierced. If the end 939A of the break line 939 according to the comparative example shown in FIG. 22 were not curved, there is a concern that when the container 22 overlapping with the overlapping wiring path 32J2 is opened, not only the overlapping wiring path 32J2, which should have been opened, but also part of the wiring path 32I may be broken. As a result, there is a concern that an unopened container 22 may be erroneously detected as being opened. In contrast, according to the breaking line 39 of this embodiment, the direction in which the tamper detection sheet 30 is broken is restricted (controlled), so that erroneous breaking of the wiring paths 32A-32J can be suppressed, and therefore erroneous detection can be suppressed.

[0061] Next, specific processing of the opening management system 10 configured as described above will be described with reference to Figures 23A, 23B, 24A, and 24B. Hereinafter, the flow of information from the information processing terminal 70 to the management server 60, the communication server 86, and the opening detector 40 in this order will be referred to as downstream communication (downlink), and conversely, the flow of information from the opening detector 40 to the communication server 86, the management server 60, and the information processing terminal 70 in this order will be referred to as upstream communication (uplink).

[0062] The user launches the app on the information processing terminal 70 and inputs the registration information for the opening detector 40. When inputting the registration information, the user reads the ID information attached to the housing 50 of the opening detector 40 and inputs it into the information processing terminal 70, or the information processing terminal 70 reads it directly, and the management server 60 records the correspondence between the ID information of the opening detector 40 and the identification information of the information processing terminal 70. An encrypted cryptographic code, rather than plaintext ID information, may be attached to the housing 50 of the opening detector 40, and the cryptographic code may be decrypted into ID information by the management server 60. The ID information of the opening detector 40 may be device-specific information for the opening detector 40 or the information processing terminal 70. The identification information of the information processing terminal 70 may be device-specific information for the information processing terminal 70, or may be information specific to the user who uses the information processing terminal 70.

[0063] 23A, the input registration information is transmitted by the information processing terminal 70 via downlink to the management server 60 (S100). Specifically, the registration information includes the time of taking the drug T (an example of the detection time), the opening detection frequency of the opening detector 40, the notification settings of the opening detector 40, the transmission frequency of the opening detection result from the opening detector 40, and the frequency of requests for transmission of setting information from the management server 60. Furthermore, the registration information transmitted via downlink to the management server 60 associates the ID information of the opening detector 40 with the identification information of the information processing terminal 70.

[0064] When medication is taken multiple times a day, the medication time includes the time of each dose. For example, if medication is taken three times a day after meals, the medication times include the times after breakfast, lunch, and dinner. The frequency of opening detection is set to whether detection is performed periodically at regular intervals (hereinafter referred to as periodic detection) or continuously (hereinafter referred to as real-time detection), and further to the time interval for periodic detection (e.g., 5, 10, 15, 20, 30, 60, or 120 minutes). Setting periodic detection can save more power than real-time detection, and the longer the time interval for periodic detection is set, the more power can be saved. In this embodiment, the case where periodic detection is set will be specifically described.

[0065] The notification setting of the opening detector 40 is a setting for the lighting pattern of the LED 45 when the medication is forgotten (unopened), and can be selected from a plurality of patterns with different lighting (flashing) times. The transmission frequency of the opening detection result from the opening detector 40 is a setting for whether or not information transmission (uplink) from the opening detector 40 is performed only when there is a change in the opening detection result. If it is set to only when there is a change in the opening detection result, the data transmission frequency of the opening detector 40 can be reduced, thereby saving power. In this embodiment, a case where it is set to transmit data only when there is a change in the opening detection result will be specifically described.

[0066] The frequency of requests for transmission of setting information from the management server 60 (hereinafter referred to as the periodic downlink frequency) can be set to either once a day (for example, after the medication time after dinner) or multiple times (for example, after breakfast, lunch, and dinner). By adjusting the periodic downlink frequency, it is possible to update the setting information of the opening detector 40 while minimizing the power consumption of the opening detector 40 associated with the updates. In this embodiment, a specific description will be given of a case where the periodic downlink frequency is set after each medication time.

[0067] As shown in Fig. 23A, when the opening detector 40 is activated, it transmits initial data via uplink (S200). The data (uplink data) transmitted from the opening detector 40 via uplink includes ID information, the time of opening, the opening detection result (the determination result by the control unit 44 regarding the opening state of each storage section 22), the remaining charge of the rechargeable battery 47, whether or not the circuit pattern 32 of the packaging material 20 is connected to the connection section 41, and whether or not the standalone mode is activated. The initial data is uplink data when the opening detector 40 is activated or when the reset button 46 is turned on. Since the uplink data includes the ID information of the opening detector 40, even if there are multiple opening detectors 40 (even if there are multiple packaging materials 20 (and therefore pharmaceuticals T)), opening detection can be performed for each opening detector 40, and each opening detector 40 can issue a notification based on the opening state.

[0068] The independent mode is an operating mode that is activated when radio wave conditions are poor and downlink data, which will be described later, is not transmitted to the opening detector 40. In the independent mode, uplink data is transmitted at regular intervals based on a timer provided in the control unit 44 of the opening detector 40, rather than at the data transmission frequency (frequency of transmitting the opening detection result) set in the registration information entered in the app. According to the independent mode, even when radio wave conditions are poor and the downlink data is not transmitted normally to the opening detector 40, uplink data is transmitted from the opening detector 40. However, since the current time included in the downlink data is not transmitted to the opening detector 40, the process of flashing the LED 45 to issue an alert to notify the user of a missed dose is not executed when the independent mode is activated.

[0069] 23A, when the communication server 86 receives the uplink data from the opening detector 40, it transfers the uplink data to the management server 60 and also makes a callback request (transmission request) for setting information to the management server 60 (S300). The management server 60 receives the uplink data transferred from the communication server 86 (S400). Furthermore, the information generation unit 62 of the management server 60 generates setting information for causing the opening detector 40 to perform predetermined processing related to opening detection based on the registration information transmitted from the information processing terminal 70 in step S100, and outputs (transmits) this setting information (hereinafter referred to as downlink data) in response to the callback request from the communication server 86 (S402). In this embodiment, the downlink data is setting information generated as 64-bit data, and includes the registration information described above and the current time.

[0070] 23A, the communications server 86 receives downlink data from the management server 60 and transfers it to the opening detector 40 (S302). The downlink data is overwritten in the storage unit 48 of the opening detector 40, and the setting information of the opening detector 40 is updated (S202). Therefore, after the update, the control unit 44 of the opening detector 40 will execute a predetermined process related to opening detection based on the updated setting information.

[0071] Next, as shown in FIG. 23B, the control unit 44 of the opening detector 40 determines whether or not this is the final dose of the day (for example, the third dose if the dose is taken three times a day) (S204). If this is the final dose (YES in S204), the control unit 44 sets a timer to switch the operation mode of the opening detector 40 to a power-saving mode (night mode) after a certain period of time has elapsed (for example, after four hours have elapsed) (S208). The night mode is a type of power-saving mode, and is an operation mode that stops periodic detection in addition to the operation of the standby mode described below. In the power-saving mode, the opening detector 40 is in a standby state during times when no medication is being taken and opening detection is not necessary, such as at night, and power consumption can be reduced by not performing opening detection.

[0072] After the timer is set, when the opening detector 40 requests downlink data for the next day (S210), a callback request is issued from the communication server 86 (S304), and the downlink data is output (transmitted) from the management server 60 (S404). The downlink data is transmitted to the opening detector 40 via the communication server 86 (S306). The downlink data is overwritten in the memory unit 48 of the opening detector 40, and the setting information of the opening detector 40 is updated (S212). Then, after the timer set time in step S206 has elapsed, the opening detector 40 is switched to power-saving mode and enters a standby state (S214). On the other hand, if it is not the final dose in step S204 (NO in S204), the control unit 44 switches the operating mode of the opening detector 40 to power-saving mode (standby mode) (S214). Standby mode is a type of power saving mode, and is an operating mode in which opening detection (current is passed through connection portion 41 of opening detector 40, the voltage generated in circuit pattern 32 of packaging material 20 is detected, and the opening state is determined) is not performed.

[0073] After being switched to the power-saving mode (S214 in FIG. 23B), the opening detector 40 is activated from the power-saving mode at a predetermined timing (for example, in the case of periodic detection, the timing is activated by a timer of the control unit 44 based on the detection interval included in the downlink data) as shown in FIG. 24A (S220). Then, the control unit 44 performs opening detection for each container 22 to determine the opening state (S222), and if the opening state is found, outputs (transmits) uplink data (S238). The uplink data is transmitted to the management server 60 via the communication server 86 (S320) (S420), and the opening status is displayed on the information processing terminal 70 (S120). On the other hand, if the opening state is found to be unopened in step S222, the control unit 44 switches the opening detector 40 to the power-saving mode (standby mode) (S226).

[0074] Next, when the current time is after the medication time (YES in S228), the control unit 44 cancels the power saving mode (standby mode) (S229) and executes the opening detection again (S230). If the packaging material 20 is unopened (NO in S230), the packaging material 20 has not been opened (and thus the drug T has not been taken out) even after the medication time has passed, so an alert is issued by flashing the LED 45 (S232). On the other hand, if the packaging material 20 is opened (YES in S230), the process returns to step S222.

[0075] Next, the control unit 44 waits the set periodic detection time interval and performs opening detection again (S234). If the package is in an unopened state (NO in S234), there is no change from the unopened state (NO in S230), which was the result of the previous opening detection, so uplink data is not output (sent), and the alert is stopped after a certain time has passed (S236), and the process returns to step S222. On the other hand, if the package is in an opened state (YES in S234), there is a change from the unopened state (NO in S230), which was the result of the previous opening detection, so uplink data is output (sent) to the communication server 86 (S238). The uplink data includes data indicating the opening time, which is the current time when the control unit 44 of the opening detector 40 detected the opening state. As described above, the uplink data is sent to the management server 60 via the communication server 86 (S320) (S420), and the opening status is displayed on the information processing terminal 70 (S120). The management server 60 transfers the uplink data to the information processing terminal 70, and the information processing terminal 70 displays the opening status including at least the opening time based on the uplink data. The management server 60 also acquires the ID information of the opening detector 40 included in the uplink data, and transfers the uplink data to the information processing terminal 70 that has entered the registration information associated with this ID information.

[0076] After outputting the uplink data (S238), the control unit 44 of the opening detector 40 determines whether the current time is after the final administration time (S240). The final administration time is the latest of the multiple administration times included in the downlink data. The final administration time is the latest time after the administration time at which the drug T should be taken. Since the drug T is required to be taken after the administration time and by the final administration time at the latest, the packaging material 20 is required to be opened after the administration time and by the final administration time. If the current time is not after the final administration time (NO in S240), the process returns to step S222 and the above-described opening detection process is repeated.

[0077] If the current time is after the last medication time (YES in S240), as shown in FIG. 24B, the opening detector 40 requests downlink data (S242), a callback request is issued from the communication server 86 (S322), and the downlink data is output (transmitted) from the management server 60 (S422). The downlink data is transmitted to the opening detector 40 via the communication server 86 (S324). The downlink data is overwritten in the memory unit 48 of the opening detector 40, and the setting information of the opening detector 40 is updated (S244). After the update, the opening detector 40 switches to power-saving mode (S246).

[0078] <Embodiment 2> An opening management system 110 according to the second embodiment will be described with reference to Fig. 25. In the second embodiment, the same configurations, actions, and effects as those in the first embodiment will not be described again.

[0079] In the opening management system 110, the opening detector 140 is communicatively connected to the information processing terminal 170 via BLE (Bluetooth Low Energy (registered trademark)). The opening detector 140 is equipped with a communication module for BLE, and the information processing terminal 170 has a BLE function. As a result, the opening detector 140 is paired and connected to the information processing terminal 170, and can communicate with the management server 60 connected to the communication network 80 via the information processing terminal 170. In this way, even in a situation where LPWA communication is not available (for example, in an area where a base station 85 is not installed), it becomes possible to detect opening and issue a notification based on the opening status.

[0080] <Embodiment 3> A packaging material 120 according to the third embodiment will be described with reference to Fig. 26. In the second embodiment, the same configurations, actions, and effects as those in the first and second embodiments will not be described again.

[0081] In the packaging material 120, the drug T is, for example, an elongated capsule tablet, and each storage section 122 has an elongated oval shape in plan view in accordance with this. Furthermore, the dimension of the storage section 122 in the X-axis direction is larger than that of the first embodiment, and the planar shape and planar size of the packaging material 120 are different from those of the first embodiment. The positions of the first terminal portion 32Z1 and the second terminal portions 32A1-32J1 of the opening detection sheet 130 are provided at the same intervals as in the first embodiment and correspond to the positions of the contacts 41B of the opening detector 40. This allows opening detection to be performed by an opening detector 40 of the same specifications for packaging materials 120 of different planar sizes. Furthermore, the position of the breaking line 139 is provided according to the shape of the drug T and is formed so as to overlap, in plan view, with the position of the drug T that comes into contact with the drug T when the drug T is pushed out.

[0082] <Other embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope of the present invention.

[0083] (1) The shape of the main body 21 shown in the illustration, as well as the shape, number, and interval of the accommodation parts 22 and 122, etc. are examples and can be changed as appropriate. Also, the shape and size of the unsealing detection sheets 30 and 130, the number of wiring paths of the circuit pattern 32, and the number of break lines 39 and 139, etc. can also be changed as appropriate according to these.

[0084] (2) The shape of the housing 50 shown in the illustration is an example and can be changed as appropriate.

[0085] <Examples of utilization of uplink data> As described above, the management server 60 may transfer the uplink data to the information processing terminal 70 as it is, or may transmit various processed data generated by information processing based on the uplink data to the information processing terminal 70. Furthermore, the management server 60 may transmit the uplink data or the processed data to terminals other than the information processing terminal 70 that has input the registration information.

[0086] The uplink data or the processed data may be transmitted to the terminal used by the person taking the pharmaceutical product T packaged in the packaging material 20, or may be the terminal of the medical institution that prescribed the pharmaceutical product T, or may be the terminal of the pharmaceutical manufacturer that manufactures the pharmaceutical product T, or may be the terminal of the packaging material manufacturer that manufactures the packaging material 20, or may be the terminal of the distributor on the distribution route of the pharmaceutical product T. It is desirable that the management server 60 be configured to make the uplink data and the processed data inaccessible from the outside and transmit the uplink data and the processed data only to the legitimate destination. The management server 60 may encrypt and record the uplink data and the processed data so that only the legitimate destination can decrypt them.

[0087] As described above, the management server 60 may perform the following information processing based on the uplink data. The management server 60 may create an opening time database that stores the registration information entered at the information processing terminal 70 and the opening time indicated by the uplink data. Furthermore, the management server 60 may determine whether the medication is being taken appropriately by comparing the medication taking time indicated in the registration information with the opening time, and may transmit processed data indicating the determination result to various terminals. Such processed data is useful not only to the prescriber of the drug T, such as a doctor or pharmacist, but also to the person taking the drug T.

[0088] The management server 60 may generate processed data by statistically processing the opening times stored in the opening time database. Specifically, the management server 60 may statistically process the opening times for each attribute (e.g., age, gender, etc.) of the person taking the medicine T, or may statistically process the opening times for each type of medicine T. Furthermore, the management server 60 may generate a prediction model that predicts the medication status of the medicine T by performing machine learning using the opening times stored in the opening time database as training data. The management server 60 may transmit data indicating the medication status predicted by the prediction model to each terminal as processed data.

[0089] The packaging material 20 is not necessarily limited to packaging pharmaceutical products T, but may be used to package any package that is opened and consumed. Furthermore, the packaging material need not necessarily be sealed as long as it can accommodate the opening detector 40. The packaging material may also be a sticker affixed to both the container that contains the package and the package, and may be broken when the package is removed from the container. For example, the packaging material may be a sticker affixed to both a file container and a book or booklet. For example, when the present invention is applied to a package with a fixed expiration date, such as food, it is possible to verify whether the product is being consumed at the appropriate time based on the opening time indicated by the uplink data. Even when the present invention is applied to a package with an indefinite expiration date, the consumption status of the package can be ascertained based on the opening time indicated by the uplink data, thereby providing useful information to package suppliers and producers. [Explanation of symbols]

[0090] 20, 120: packaging material, 22, 122: storage section, 24: lid material, 30, 130: opening detection sheet, 31: base layer, 32: circuit pattern, 32A, 32B, 32C, 32D, 32E, 32F, 32G, 32H, 32I, 32J: wiring path, 32A1, 32B1, 32C1, 32D1, 32E1, 32F1, 32G1, 32H1, 32I1, 32J1: second terminal section, 32Z: common wiring path, 32Z1: first terminal section, 40, 140: opening detector (external device), T: medicine (contained item)

Claims

1. An opening detection sheet that is attached to a packaging material having a plurality of storage sections, a substrate layer; a circuit pattern provided on the base layer and having a plurality of wiring paths; the plurality of wiring paths are provided for each of the accommodation sections, a first terminal portion connected to an external device that detects the opening of the housing portion based on the electrical resistance of the circuit pattern is provided on one end side of each of the wiring paths; the first terminal portions are provided at the same positions in the different wiring paths, the wiring paths extend from the first terminal portion in a predetermined direction and include a common wiring path that is the same path among different wiring paths; the first terminal portion is provided at the same position for all of the wiring paths, the common wiring path is the same for all of the wiring paths, and a predetermined reference potential is supplied from the external device via the first terminal portion; An opening detection sheet in which the width of the common wiring path to which the reference potential is supplied is larger than the width of other parts of the wiring path.

2. a second terminal portion for connection to an external device is provided on the other end side of each of the wiring paths, The opening detection sheet according to claim 1 , wherein the second terminal portion is provided for each of the wiring paths.

3. The opening detection sheet according to claim 2 , wherein the second terminal portion is provided at a different position for each of the wiring paths.

4. The base material layer has a rectangular shape in a plan view, The opening detection sheet according to claim 2 or 3, wherein the first terminal portion and the second terminal portion are provided on one side of the rectangular shape.

5. The base layer has an elongated rectangular shape, The opening detection sheet according to claim 4 , wherein the first terminal portion and the second terminal portion are provided on one short side of the rectangular shape.

6. The opening detection sheet according to claim 5 , wherein the length of the wiring path is greater in the housing section that is located at a greater distance from the one short side.

7. The opening detection sheet according to claim 3 , wherein each of the wiring paths is substantially U-shaped from the first terminal portion to the second terminal portion.

8. A lid material that seals the storage section; and the opening detection sheet according to any one of claims 1 to 7 attached to the lid material, The package material allows the contents contained in the storage section to be removed by pushing and tearing the lid material and the opening detection sheet.

9. The packaging material according to claim 8 , wherein each of the wiring paths overlaps with the center of one of the plurality of storage sections in a plan view.

Images