Diaper sensor, disposable diaper, and disposable diaper kit

Abstract

To provide a paper diaper which can detect wet of a diaper by a diaper sensor with higher certainty.SOLUTION: A diaper sensor 100 has a wet detection sensor unit 90 in the shape of a sheet including a circuit 60 broken or damaged by becoming wet. The diaper sensor 100 includes: a water high-permeable sheet 85 forming a surface arranged on the body surface side of a user; and at least one of a first water absorption sheet 81 located between the water high-permeable sheet 85 and the wet detection sensor unit 90 and a second water absorption sheet 83 arranged in an opposite side to a side where the water high-permeable sheet 85 is arranged across the wet detection sensor unit 90.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a diaper sensor, a disposable diaper, and a disposable diaper kit. [Background technology]

[0002] Patent Document 1 describes a paper diaper body, paper The document describes a diaper sensor (referred to as a liquid detection sensor in the document) that is provided in a position on the diaper body corresponding to the external urethral meatus. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-38971 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the investigations of the present inventors, there is room for improvement in the diaper sensor of Patent Document 1 in terms of the reliability of detecting that the diaper sensor has been immersed in liquid.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a disposable diaper having a structure that enables a diaper sensor to more reliably detect that the diaper sensor has been immersed in liquid. [Means for solving the problem]

[0006] According to the present invention, there is provided a diaper sensor including a sheet-like wetness detection sensor portion including a circuit that is broken or damaged when wet with liquid, a highly water-permeable sheet that forms a surface of the diaper sensor that is placed on the user's body surface; a first water-absorbent sheet interposed between the highly water-permeable sheet and the wetness detection sensor unit; 、 a second water-absorbent sheet disposed on the opposite side of the wetness detection sensor from the highly water-permeable sheet; and, Equipped with The wetness detection sensor unit a substrate having a base material, a first conductive pattern formed on one surface of the base material, and a mounting component electrically connected to the first conductive pattern; a second conductive pattern that configures the circuit in a complementary manner to the first conductive pattern; Equipped with In a plan view, a portion of the base material that overlaps with the second conductive pattern is a missing portion, the missing portion penetrates the base material in a thickness direction of the base material, The second conductive pattern is soluble in liquid or becomes weak when wetted by liquid. is provided.

[0007] Further, according to the present invention, there is provided a disposable diaper body, a first diaper sensor provided at a position on the disposable diaper body corresponding to the external urethral meatus; a second diaper sensor provided at a location on the disposable diaper body different from the location of the first diaper sensor; Equipped with There is provided a disposable diaper, wherein each of the first diaper sensor and the second diaper sensor is a diaper sensor according to the present invention.

[0008] Further, according to the present invention, there is provided a disposable diaper of the present invention, Urinary incontinence pads and A paper diaper kit comprising: The urine leakage pad has a urine leakage pad main body and a pad side sensor part provided on the urine leakage pad main body, The pad-side sensor portion is a disposable diaper kit that is a diaper sensor according to the present invention. [Effects of the Invention]

[0009] According to the present invention, it is possible to more reliably detect that the diaper sensor has been immersed in liquid. [Brief explanation of the drawings]

[0010] [Figure 1]1 is an end view of a disposable diaper according to an embodiment, showing a diaper sensor and its surrounding structure. FIG. [Figure 2] 1 is an exploded end view of a disposable diaper according to an embodiment, showing a diaper sensor and its surrounding structure. FIG. [Figure 3] FIG. 2 is a plan view of the diaper sensor according to the embodiment. [Figure 4] FIG. 2 is a plan view of a substrate of the diaper sensor according to the embodiment. [Figure 5] FIG. 2 is a plan view of a soluble layer of the diaper sensor according to the embodiment. [Figure 6] 1 is a schematic development view of a disposable diaper according to an embodiment. FIG. [Figure 7] FIG. 10 is an end view of a disposable diaper according to a modified embodiment, showing a diaper sensor and its surrounding structure. [Figure 8] FIG. 10 is an exploded end view of a disposable diaper according to a modified embodiment, showing a diaper sensor and its surrounding structure. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to Figures 1 to 6. In all the drawings, similar components are denoted by the same reference numerals, and descriptions thereof will be omitted where appropriate. Figure 1 shows a cross-sectional end surface taken along line BB in region A (region surrounded by a two-dot chain line frame) shown in Figure 3, and Figure 2 is an exploded end view of a portion corresponding to Figure 1.

[0012] As shown in Figures 1 and 2, the diaper sensor 100 of this embodiment (in this embodiment, the first diaper sensor 110 and the second diaper sensor 120 described below) is a diaper sensor 100 equipped with a sheet-like wetness detection sensor unit 90 including a circuit 60 that breaks or is damaged when wet with liquid. The diaper sensor 100 comprises at least one of a highly water-permeable sheet 85 that forms the surface of the diaper sensor 100 that is placed on the side of the user's body, a first water-absorbent sheet 81 that is interposed between the highly water-permeable sheet 85 and a wetness detection sensor unit 90, and a second water-absorbent sheet 83 that is placed on the opposite side of the highly water-permeable sheet 85 from the wetness detection sensor unit 90. Furthermore, each of the first water absorbent sheet 81 and the second water absorbent sheet 83 has higher water absorbency than the highly water-permeable sheet 85 (excellent water absorbency).

[0013] According to this embodiment, the diaper sensor 100 includes at least either the first water absorbent sheet 81 or the second water absorbent sheet 83, and therefore the first water absorbent sheet 81 or the second water absorbent sheet 83 can quickly absorb liquid (urine) and supply it to the wetness detection sensor unit 90. This makes it possible to more reliably prevent the circuit 60 from being broken or damaged when the diaper sensor 100 is immersed in liquid. In other words, it becomes possible to more reliably detect that the diaper sensor 100 has been immersed in liquid. In addition, because the diaper sensor 100 is provided with the highly water-permeable sheet 85 that forms the surface that faces the user's body, when the user urinates, the highly water-permeable sheet 85 allows the user's urine to quickly pass through toward the circuit 60, which also makes it possible to more reliably detect that the diaper sensor 100 has been immersed in liquid. Moreover, because the highly water-permeable sheet 85 forms the surface that faces the user's body, even in a structure that includes the highly water-permeable sheet 85, the surface of the diaper sensor 100 facing the user's body can remain dry and comfortable, reducing discomfort to the user.

[0014] As shown in Figures 1 to 6, the disposable diaper 300 of this embodiment comprises a disposable diaper main body 301 (see Figure 6), a first diaper sensor 110 provided in a region 302 (see Figure 6) of the disposable diaper main body 301 corresponding to the external urethral meatus, and a second diaper sensor 120 provided in a region of the disposable diaper main body 301 different from the first diaper sensor 110. Each of the first diaper sensor 110 and the second diaper sensor 120 is the above-mentioned diaper sensor 100 is. 3, the first absorbent sheet 81, the second absorbent sheet 83, and the highly water-permeable sheet 85 are not shown. In addition, in FIG. 6, a portion 302 of the disposable diaper body 301 corresponding to the external urethral meatus is indicated by a two-dot chain line.

[0015] According to this embodiment, the disposable diaper 300 comprises a first diaper sensor 110 provided at a location on the disposable diaper body 301 corresponding to the external urethral meatus, and a second diaper sensor 120 provided at a location on the disposable diaper body 301 different from the first diaper sensor 110. As a result, when the user urinates into the disposable diaper 300, the first diaper sensor 110 can detect the user's urination. Furthermore, the second diaper sensor 120 can detect the presence of urine at a location on the disposable diaper 300 other than the location corresponding to the external urethral meatus. Therefore, for example, when the user's urine leaks or is about to leak from the disposable diaper body 301 (hereinafter simply referred to as "urine leakage"), the second diaper sensor 120 can detect the urine leakage. That is, according to this embodiment, urination by the user and leakage of urine from the disposable diaper body 301 can be detected separately.

[0016] In the following, when describing the positional relationship between the components of the disposable diaper 300, the upper side in Fig. 1 will be referred to as the upper side or upper direction, and the opposite side will be referred to as the lower side or lower direction. Also, a direction perpendicular to the up-down direction will be referred to as the horizontal direction. However, these direction specifications are for convenience only and do not limit the directions during the manufacture or use of the disposable diaper 300. 1 to 3 is referred to as the X direction, and the up-down direction in FIG. 3 is referred to as the Y direction. The X direction and the Y direction are parallel (horizontal) to the surface direction of the disposable diaper 300, and are the up-down direction in FIG. 0's It is perpendicular to the plane direction.

[0017] In the present embodiment, for example, the first diaper sensor 110 and the second diaper sensor 120 have the same configuration. The diaper sensor 100 (first diaper sensor 110 and second diaper sensor 120) is formed in a sheet shape. More specifically, the entire diaper sensor 100 (first diaper sensor 110 and second diaper sensor 120) is formed in a soft (flexible) sheet shape. The first diaper sensor 110 (second diaper sensor 120) is, for example, a laminate formed in a flat plate shape. The planar shape of the first diaper sensor 110 (second diaper sensor 120) is not particularly limited, but as an example, it can be a substantially rectangular shape (for example, a rectangular shape with rounded corners) that is elongated in one direction as shown in FIG. In this embodiment, the mounted component 50 is, for example, a chip for RFID use (generally also called an IC chip), and the first diaper sensor 110 (second diaper sensor 120) is an RFID tag.

[0018] More specifically, as shown in Figures 1 to 3, the wetness detection sensor unit 90 of each of the first diaper sensor 110 and the second diaper sensor 120 includes a substrate 10 having a base material 11, a first conductive pattern 30 formed on the base material 11, and a mounting component 50 electrically connected to the first conductive pattern 30, and a second conductive pattern 40 that forms a circuit 60 complementary to the first conductive pattern 30. The portions of the substrate 11 corresponding to the second conductive patterns 40 are missing portions 12. Furthermore, each of the second conductive patterns 40 is soluble in liquid or becomes weakened by contact with liquid. Here, the portion of the substrate 11 that corresponds to the second conductive pattern 40 is the portion that corresponds to (overlaps with) the second conductive pattern 40 in a planar view (when viewed in the direction perpendicular to the surface of the first diaper sensor 110 (second diaper sensor 120)). Furthermore, the second conductive pattern 40 being soluble in liquid means that the second conductive pattern 40 dissolves (melts) upon contact with a liquid, and more specifically, means that the second conductive pattern 40 dissolves upon contact with, for example, water (moisture). That is, the second conductive pattern 40 is, for example, water-soluble. When the second conductive pattern 40 is dissolved or weakened by sufficient contact with the liquid, it is expected that the circuit 60 will no longer be able to maintain its initial characteristics. For example, by detecting a disconnection in the circuit 60, it is possible to detect that the diaper sensor 100 has been immersed in liquid.

[0019] According to this embodiment, the diaper sensor 100 (first diaper sensor 110 and second diaper sensor 120) includes the substrate 10, thereby ensuring sufficient structural strength for the diaper sensor 100. Furthermore, the portion of the base material 11 corresponding to the second conductive pattern 40 is provided with the missing portion 12, which allows liquid (urine) to easily come into contact with the second conductive pattern 40 through the missing portion 12. This ensures that the second conductive pattern 40 dissolves more reliably when the diaper sensor 100 is immersed in liquid. This makes it possible to satisfactorily achieve both the structural strength of the diaper sensor 100 and the reliability of detecting that the diaper sensor 100 has been immersed in liquid.

[0020] Furthermore, in this embodiment, the wetness detection sensor unit 90 is disposed opposite the substrate 11 and includes a soluble layer 21 that is soluble in a liquid or that becomes weakened when wetted by a liquid. A second conductive pattern 40 is formed on the other surface 21b of the soluble layer 21. With this configuration, when the soluble layer 21 holding the second conductive pattern 40 is dissolved by sufficient contact with the liquid, if a slight external force is applied to the second conductive pattern 40, the second conductive pattern 40 will easily break or crack, and it is expected that the circuit 60 will not be able to maintain its initial characteristics. In other words, it is possible to more reliably detect that the diaper sensor 100 has been immersed in liquid.

[0021] However, the present invention is not limited to the above example, and for example, either the soluble layer 21 or the second conductive pattern 40 may be soluble in a liquid. If only the soluble layer 21 of the soluble layer 21 and the second conductive pattern 40 is soluble in liquid, and if a slight external force is applied to the second conductive pattern 40 in a state in which the soluble layer 21 holding the second conductive pattern 40 has dissolved due to sufficient contact with the liquid, the second conductive pattern 40 will easily break or crack, and it is expected that the circuit 60 will no longer be able to maintain its initial characteristics. Then, by detecting a change in the characteristics of the circuit 60 (for example, a break in the circuit 60), it can be detected that the first diaper sensor 110 (second diaper sensor 120) has been immersed in liquid. If only the second conductive pattern 40 of the soluble layer 21 and the second conductive pattern 40 is soluble in liquid, as described above, each of the second conductive patterns 40 will dissolve or become weakened by sufficient contact with the liquid, and the circuit 60 will be unable to maintain its initial characteristics. This makes it possible to detect that the first diaper sensor 110 (second diaper sensor 120) has been immersed in liquid.

[0022] 1 and 2, in the wetness detection sensor unit 90, a first conductive pattern 30 is directly laminated on one surface 11a of a substrate 11, and a second conductive pattern 40 is directly laminated on the first conductive pattern 30. In addition, a fusible layer 21 is laminated on the substrate 11 with the first conductive pattern 30 and the second conductive pattern 40 interposed therebetween.

[0023] As shown in FIGS. 3 and 4, in this embodiment, the base material 11 has, for example, a plurality of missing portions 12 that respectively correspond to a plurality of second conductive patterns 40, which will be described later. More specifically, the substrate 10 has, for example, a pair of left and right notches 12, and the left and right notches 12 have the same shape and are arranged symmetrically. More specifically, the notches 12 are formed, for example, in a substantially rectangular shape (e.g., a rectangular shape with rounded corners) that is elongated in the Y direction. However, the shape of the notches 12 is not particularly limited. Each of the notches 12 is an opening formed in the substrate 11. That is, each of the notches 12 penetrates the substrate 11 from the front to the back. In the area where each of the notches 12 exists, the first conductive pattern 30 is not formed. Each of the notches 12 may be slit-shaped.

[0024] In the present embodiment, the first conductive pattern 30 has, as an example, an antenna wiring portion and a component mounting wiring portion, which will be described below.

[0025] The antenna wiring portion has a first antenna wiring portion located on the left side in FIG. 4 and a second antenna wiring portion located on the right side. The first antenna wiring portion has, for example, a wide portion 31a formed in a generally rectangular shape elongated in the Y direction in a plan view, and a zigzag portion 32a formed narrower than the wide portion 31a and extending in the X direction while zigzagging in the Y direction. The left end of the zigzag portion 32a is connected to the wide portion 31a, and the right end of the zigzag portion 32a is connected to the component mounting wiring portion. The second antenna wiring portion is formed, for example, symmetrically with the first antenna wiring portion and has a wide portion 31b and a zigzag portion 32b. The right end of the zigzag portion 32b is connected to the wide portion 31b, and the left end of the zigzag portion 32b is connected to the component mounting wiring portion.

[0026] The component mounting wiring section has a straight line pattern component 33a connected to the right end of zigzag section 32a and extending in the X direction, a straight line pattern component 34a arranged on an extension of straight line pattern component 33a with missing section 12 on the left side sandwiched therebetween and extending in the X direction, a straight line pattern component 34b connected to the right side of straight line pattern component 34a and extending in the X direction, and a straight line pattern component 33b arranged on an extension of straight line pattern component 34b with missing section 12 on the right side sandwiched therebetween and extending in the X direction. The component mounting wiring portion further includes a connecting portion 35 and annular pattern components 36a, 37a, 38a, 39a, 301a, 36b, 37b, 38b, 39b, and 301b, which will be described below. One end of the connecting portion 35 is connected to the boundary between the linear pattern component 34a and the linear pattern component 34b, and the connecting portion 35 extends from the boundary in one direction in the Y direction (downward in Figure 4) (i.e., extends in the Y direction). The annular pattern component 36a is connected to the other end of the connecting portion 35 and extends leftward from the other end of the connecting portion 35 (i.e., extends in the X direction). The annular pattern component 37a is disposed on an extension of the annular pattern component 36a, with the missing portion 12 on the left side sandwiched therebetween, and extends in the X direction. One end of the annular pattern component 38a is connected to the left end of the annular pattern component 37a, and the annular pattern component 38a extends from the left end of the annular pattern component 37a in one direction in the Y direction (downward in FIG. 4 ) (i.e., extends in the Y direction). The annular pattern component 39a is connected to the other end of the annular pattern component 38a and extends rightward from the other end of the annular pattern component 38a (i.e., extends in the X direction). The annular pattern component 301a is disposed on an extension of the annular pattern component 39a, with the missing portion 12 on the left side sandwiched therebetween, and extends in the X direction. The annular pattern component 36b is connected to the other end of the connecting portion 35 and extends rightward from the other end of the connecting portion 35 (i.e., extends in the X direction). The annular pattern component 37b is disposed on an extension of the annular pattern component 36b, sandwiching the missing portion 12 on the right side, and extends in the X direction. One end of the annular pattern component 38b is connected to the right end of the annular pattern component 37b, and the annular pattern component 38b extends from the right end of the annular pattern component 37b to one side in the Y direction (downward in FIG. 4 ) (i.e., extends in the Y direction). The annular pattern component 39b is connected to the other end of the annular pattern component 38b and extends leftward from the other end of the annular pattern component 38b (i.e., extends in the X direction). The annular pattern component 301b is disposed on an extension of the annular pattern component 39b, sandwiching the missing portion 12 on the right side, and extends in the X direction. The annular pattern component 301a and the annular pattern component 301b are arranged on the extension of each other.

[0027] The soluble layer 21 is made of, for example, a material containing PVA (polyvinyl alcohol). By making the soluble layer 21 contain PVA, it is possible to realize a structure in which the soluble layer 21 dissolves well when the diaper sensor 100 comes into contact with moisture. However, when the soluble layer 21 is water-soluble, the material of the soluble layer 21 is not limited to PVA, but may be, for example, polyvinylpyrrolidone, water-soluble polyester, water-soluble paper material, or sheet material derived from starch components. Furthermore, in the case of the present embodiment, the fusible layer 21 contains a resin having hot-melt properties, and is hot-melt bonded to each of the base material 11 and the first conductive pattern 30. That is, the fusible layer 21 is fusion-bonded to each of the base material 11 and the first conductive pattern 30. However, the present invention is not limited to this example, and the soluble layer 21 may be bonded to each of the base material 11 and the first conductive pattern 30 by, for example, a water-soluble adhesive (not shown).

[0028] The second conductive pattern 40 is formed on the other surface 21b side of the fusible layer 21, for example. 5, the diaper sensor 100 has, for example, bridge portions 41a, 41b, 42a, 42b, 43a, and 43b extending in the X direction as the second conductive patterns 40. That is, the diaper sensor 100 has, for example, a plurality of second conductive patterns 40. 3, bridge portion 41a interconnects the right end of linear pattern component 33a and the left end of linear pattern component 34a. Bridge portion 41b interconnects the right end of linear pattern component 34b and the left end of linear pattern component 33b. As a result, linear pattern component 33a, bridge portion 41a, linear pattern component 34a, linear pattern component 34b, bridge portion 41b, and linear pattern component 33b form a linear pattern that extends linearly in the X direction and interconnects the first antenna wiring unit and the second antenna wiring unit. Bridge portion 42a interconnects the right end of annular pattern component 37a and the left end of annular pattern component 36a. Bridge portion 42b interconnects the right end of annular pattern component 36b and the left end of annular pattern component 37b. Bridge portion 43a interconnects the right end of annular pattern component 39a and the left end of annular pattern component 301a. Bridge portion 43b interconnects the right end of annular pattern component 301b and the left end of annular pattern component 39b. As a result, a circular pattern is formed by the circular pattern component 301a, bridge portion 43a, circular pattern component 39a, circular pattern component 38a, circular pattern component 37a, bridge portion 42a, circular pattern component 36a, circular pattern component 36b, bridge portion 42b, circular pattern component 37b, circular pattern component 38b, circular pattern component 39b, bridge portion 43b, and circular pattern component 301b. The circular pattern is formed, for example, in a substantially rectangular ring shape in a plan view. The circular pattern is discontinuous between the circular pattern component 301a and the circular pattern component 301b. In other words, the circular pattern has a shape with an opening (an open ring shape). The connecting portion 35 connects the linear pattern and the annular pattern to each other.

[0029] Here, bridge portion 41a, bridge portion 42a, and bridge portion 43a are each positioned across the missing portion 12 on the left side, and bridge portion 41b, bridge portion 42b, and bridge portion 43b are each positioned across the missing portion 12 on the right side. 1, the bridge portion 43a is provided between the annular pattern component 39a and the annular pattern component 301a to electrically connect the annular pattern component 39a and the annular pattern component 301a to each other. Similarly, the bridge portion 43b is provided between the annular pattern component 301b and the annular pattern component 39b to electrically connect the annular pattern component 301b and the annular pattern component 39b to each other. Similarly, bridge portion 41a is installed between linear pattern component 33a and linear pattern component 34a to electrically connect linear pattern component 33a and linear pattern component 34a to each other, bridge portion 41b is installed between linear pattern component 34b and linear pattern component 33b to electrically connect linear pattern component 34b and linear pattern component 33b to each other, bridge portion 42a is installed between annular pattern component 37a and annular pattern component 36a to electrically connect annular pattern component 37a and annular pattern component 36a to each other, and bridge portion 42b is installed between annular pattern component 36b and annular pattern component 37b to electrically connect annular pattern component 36b and annular pattern component 37b to each other.

[0030] In this way, the second conductive patterns 40 (each of the bridge portions 41a, 41b, 42a, 42b, 43a, and 43b) are arranged across the notched portion 12 and bridge between a first portion of the first conductive pattern 30 and a second portion of the first conductive pattern 30 that is separated from the first portion with the notched portion 12 in between, thereby electrically connecting the first portion and the second portion to each other. In other words, each of the second conductive patterns 40 forms a bridge wiring. In a plan view, the second conductive patterns 40 extend from a part of the peripheral edge of the notched portion 12, across the notched portion 12, and over the other part of the peripheral edge of the notched portion 12.

[0031] The diaper sensor 100 may have portions other than the bridge portions 41a to 43b as the second conductive pattern 40, but the bridge portions 41a to 43b are wiring portions that form the circuit 60. That is, the portions of the second conductive pattern 40 corresponding to the missing portions 12 (bridge portions 41a to 43b) are wiring portions that constitute the circuit 60, and are not electrodes or the like.

[0032] The second conductive pattern 40 (each of the bridge portions 41a, 41b, 42a, 42b, 43a, and 43b) is connected to the second conductive pattern 40 in the first conductive pattern 30 (straight line pattern components 33a, 33b, 34a, 34b, Circular pattern component It is preferable that the width of the fusible layer 21 is wider than the widths of the fusible layer 21 (36a, 36b, 37a, 37b, 39a, 39b, 301a, 301b). By doing so, when the substrate 10 and the fusible layer 21 are aligned and assembled to each other, and when the second conductive pattern 40 and the first conductive pattern 30 are electrically connected to each other, even if the substrate 10 and the fusible layer 21 are slightly misaligned relative to each other in the surface direction, the second conductive pattern 40 can be properly aligned and connected to the first conductive pattern 30. In addition, if the first conductive pattern 30 is, for example, a pattern derived from metal foil and has a low finished impedance, and the second conductive pattern 40 is a coating film formed by printing, it is expected that the impedance of the second conductive pattern 40 will be higher than the impedance of the pattern made of the metal foil. However, by forming the second conductive pattern 40 to be wider than the portion of the first conductive pattern 30 that is connected to the second conductive pattern 40, as described above, it is advantageous in that the impedances of the first conductive pattern 30 and the second conductive pattern 40 can be matched at a low level. However, the second conductive pattern 40 may be formed to have the same width as the portion of the first conductive pattern 30 that is connected to the second conductive pattern 40, or may be formed to have a width narrower than that portion.

[0033] The length of each second conductive pattern 40 is determined based on the length of the portion of the first conductive pattern 30 that is connected to the second conductive pattern 40 (linear pattern components 33a, 33b, 34a, 34b, Circular pattern component It is preferable that the length is longer than the width of each of the electrodes 36a, 36b, 37a, 37b, 39a, 39b, 301a, and 301b), preferably at least twice the width, and more preferably at least three times the width. In particular, it is preferable that the length (bridge length) of the portion of each second conductive pattern 40 that bridges between the first conductive patterns 30 (between the first portion and the second portion) is longer than the width dimension of the portion of the first conductive pattern 30 that is connected to the second conductive pattern 40, and it is preferable that the length is at least twice the width dimension, and more preferably at least three times the width dimension.

[0034] The second conductive pattern 40 is, for example, a water-soluble silver pattern. The thickness of the second conductive pattern 40 is not particularly limited, but is preferably, for example, 10 μm or more and 50 μm or less. When the thickness of the second conductive pattern 40 is 10 μm or more, stable characteristics of the circuit 60 can be obtained before the first diaper sensor 110 (second diaper sensor 120) comes into contact with liquid. When the thickness of the second conductive pattern 40 is 50 μm or less, the second conductive pattern 40 can be quickly dissolved or weakened when the first diaper sensor 110 (second diaper sensor 120) comes into contact with liquid.

[0035] In this embodiment, the second conductive patterns 40 are arranged as bridge wiring at multiple locations in the circuit 60, which increases the possibility that any of the second conductive patterns 40 will break, crack, or dissolve or become weakened when the first diaper sensor 110 (second diaper sensor 120) comes into contact with liquid.

[0036] In this embodiment, the base material 11 is insoluble in liquids. Therefore, even if the first diaper sensor 110 (second diaper sensor 120) unintentionally comes into contact with liquid during storage, etc., the base material 11 can be prevented from dissolving, thereby preventing the first conductive pattern 30 from breaking or cracking, which would otherwise cause changes in the characteristics of the circuit 60. The liquid-insoluble substrate 11 can be made of, for example, paper or a resin film. The resin material constituting this resin film is not particularly limited, but examples thereof include polyethylene terephthalate, polyethylene, polystyrene, polypropylene, and polyester. However, the present invention is not limited to this example, and the substrate 11 may be soluble in liquid. The thickness of the substrate 11 is not particularly limited, but is preferably, for example, 10 μm or more and 100 μm or less. When the thickness of the substrate 11 is 10 μm or more, the substrate 11 can stably support the first conductive pattern 30, and the first diaper sensor 110 (second diaper sensor 120) can have sufficient structural strength. By setting the thickness of the base material 11 to 100 μm or less, the first diaper sensor 110 (second diaper sensor 120) can have good flexibility.

[0037] In this embodiment, the first conductive pattern 30 is also insoluble in liquid. Therefore, even if the first diaper sensor 110 (second diaper sensor 120) unintentionally comes into contact with liquid during storage, etc., it is possible to prevent the characteristics of the circuit 60 from changing due to dissolution of the first conductive pattern 30. In particular, it is preferable that the majority of the circuit 60 is formed of the first conductive pattern 30 that is insoluble in liquid. However, the present invention is not limited to this example, and the first conductive pattern 30 may be soluble in liquid. The first conductive pattern 30 is, for example, a coating formed by printing or a metal foil. The first conductive pattern 30 is, for example, a coating film containing a conductive filler and a binder containing a thermoplastic resin. The conductive filler is made of, for example, gold, silver, copper, or carbon. Examples of the thermoplastic resin include polyester resin, acrylic resin, and urethane resin. The first conductive pattern 30 of metal foil can be formed, for example, by stamping or etching. The thickness of the first conductive pattern 30 is not particularly limited, but is preferably, for example, not less than 5 μm and not more than 30 μm.

[0038] The outer shape of the substrate 10 (base material 11) and the outer shape of the fusible layer 21 may be the same or different from each other. In the case of this embodiment, for example, the outer shape of the substrate 10 (base material 11) and the outer shape of the fusible layer 21 are the same and match each other in a plan view.

[0039] Although detailed illustrations are omitted, the mounting component 50 comprises, for example, a component body formed by resin-molding an element, and a mounting terminal provided along the underside of the component body, and the element and the mounting terminal are electrically connected to each other inside the resin mold. The number of mounting terminals provided on the mounting component 50 is not particularly limited, but in this embodiment, the mounting component 50 has two mounting terminals, each of which is electrically connected to the first conductive pattern 30. More specifically, one mounting terminal of the mounting component 50 is electrically connected to the right end of the annular pattern component 301a, and the other mounting terminal of the mounting component 50 is electrically connected to the left end of the annular pattern component 301b. In other words, the mounting component 50 is arranged across the annular pattern component 301a and the annular pattern component 301b. In this manner, the mounted component 50 is mounted on the component mounting wiring section.

[0040] The antenna wiring section transmits and receives signals to and from, for example, an external device (e.g., an RFID reader / writer) not shown. A signal or radio wave received by the antenna wiring section from the external device is input to the mounted component 50. The mounted component 50 transmits a signal to the external device via the component mounting wiring section and the antenna wiring section. Note that a part or the entire component mounting wiring section may also function as an antenna in cooperation with the antenna wiring section. The mounted component 50 is, for example, a passive type that operates by power excited from an external device via an antenna wiring portion.

[0041] In this embodiment, when the first diaper sensor 110 (or the second diaper sensor 120) comes into contact with a liquid, the second conductive pattern 40 dissolves (or weakens), causing the communication function of the first diaper sensor 110 (or the second diaper sensor 120) to be lost or deteriorated. When an external device detects the loss or deterioration of the communication function, it can detect that the first diaper sensor 110 (or the second diaper sensor 120) has come into contact with a liquid.

[0042] As shown in FIGS. 1 and 2, in this embodiment, the diaper sensor 100 (first diaper sensor 110 and second diaper sensor 120) includes both a first water absorbent sheet 81 and a second water absorbent sheet 83. This allows the first absorbent sheet 81 and the second absorbent sheet 83 to absorb liquid (urine), and therefore the liquid can be sufficiently supplied to the second conductive pattern 40 and the soluble layer 21. Moreover, the first absorbent sheet 81 and the second absorbent sheet 83 can prevent the second conductive pattern 40 and the soluble layer 21 that have dissolved in urine or liquid from seeping out, thereby reducing discomfort to the user. More specifically, in the first diaper sensor 110, the first water absorbent sheet 81 can sufficiently supply the urine of the user to the second conductive pattern 40 and the soluble layer 21. In the second diaper sensor 120, paper Diaper body 30 1 to The second absorbent sheet 83 can sufficiently supply the leaked urine to the second conductive pattern 40 and the soluble layer 21, and the first absorbent sheet 81 can absorb the urine dissolved in the urine or liquid from the second conductive pattern 40 and the soluble layer 21. 1 It is possible to prevent leakage of 。 Furthermore, the highly water-permeable sheet 85 allows the user's urine to be quickly supplied to the first water absorbent sheet 81, and therefore to the second conductive pattern 40 and the soluble layer 21. This allows the surface of the diaper sensor 100 facing the user's body (highly water-permeable sheet 85) to maintain a dry feel, thereby reducing discomfort to the user.

[0043] In the present embodiment, for example, the first water absorbent sheet 81 is laminated directly on one surface (one surface 21a) of the wetness detection sensor unit 90, and the second water absorbent sheet 83 is disposed directly below the other surface (other surface 11b) of the wetness detection sensor unit 90. In addition, the highly water-permeable sheet 85 is laminated directly on the first water absorbent sheet 81.

[0044] As described above, each of the first water absorbent sheet 81 and the second water absorbent sheet 83 has higher water absorbency than the highly water-permeable sheet 85 (is superior in water absorbency). More specifically, as an example, the absorbing ability of each of the first water absorbent sheet 81 and the second water absorbent sheet 83 is higher than the absorbing ability of the highly water-permeable sheet 85. Here, "wicking ability" can be evaluated, for example, by the test method specified in JIS L 1907 (Testing method for water absorbency of textile products). In this test method, a nonwoven fabric is cut to a sufficient length so that the fiber direction is the longitudinal direction, and the tip of the nonwoven fabric is immersed in colored water for 60 seconds in a suspended state, and then left to stand for 30 minutes. The height to which the water rises (wicked up height) in the longitudinal direction of the nonwoven fabric is then evaluated.

[0045] Although there are no particular limitations on the first water absorbent sheet 81 and the second water absorbent sheet 83, examples of the material include highly absorbent (highly water-retaining) nonwoven fabrics such as pulp, cotton, hemp, and rayon. The wicking capacity of each of the first water absorbent sheet 81 and the second water absorbent sheet 83 is preferably 100 mm or more and 200 mm or less, and more preferably 110 mm or more and 180 mm or less, for example. The highly water-permeable sheet 85 is not particularly limited, but may be made of polyester, polypropylene, or polyethylene terephthalate, and may have a basis weight of, for example, 5 g / m2 More than 100g / m 2 Less than or equal to 10 g / m 2 More than 50g / m 2 The nonwoven fabric is as follows: This ensures good water permeability of the highly water-permeable sheet 85.

[0046] As described above, the first diaper sensor 110 and the second diaper sensor 120 are each provided on the disposable diaper 300 (see FIG. 6). Note that FIG. 6 shows the surface of the disposable diaper 300 that comes into contact with the skin of the user.

[0047] 6, the disposable diaper body 301 includes a rear section 310 that is placed on the back side of the user, a front section 320 that is placed on the belly side of the user, a connecting section 330 that connects the rear section 310 and the front section 320, and a plurality of hook-and-loop fastener sections 340 formed on the sides of the rear section 310. By connecting both sides of the rear section 310 and the front section 320 via the hook-and-loop fastener sections 340, the disposable diaper 300 can be put on by the user. In the disposable diaper 300, an absorbent body 350 configured to be able to absorb liquid is formed on the surface that comes into contact with the skin of the user. The absorber 350 extends in the front-rear direction across the rear portion 310, the front portion 320, and the connecting portion 330, for example. When the disposable diaper 300 is worn by a user, the absorber 350 is positioned in contact with the user's external urethral meatus, and when the user urinates, the urine is absorbed by the absorber 350.

[0048] Each of the first diaper sensor 110 and the second diaper sensor 120 is preferably disposed, for example, on the surface of the disposable diaper body 301 that comes into contact with the skin of the user. In the present embodiment, as an example, each of the first diaper sensor 110 and the second diaper sensor 120 is adhered to the disposable diaper body 301 via a double-sided tape 88, a hook-and-loop fastener (not shown), or the like. In addition, each of the first diaper sensor 110 and the second diaper sensor 120 is arranged such that, for example, one surface (one surface 21a) of the wetness detection sensor unit 90 is disposed on the side that comes into contact with the user's skin, and the other surface (other surface 11b) of the wetness detection sensor unit 90 is disposed on the side opposite to the side that comes into contact with the user's skin (i.e. paper 1 and 2, the second absorbent sheet 83 is attached to the disposable diaper body 301 in a position where it is placed on the side of the disposable diaper body 301 that comes into contact with the user's skin via double-sided tape 88.

[0049] The first diaper sensor 110 is provided, for example, in the absorbent body 350 of the disposable diaper main body 301. The first diaper sensor 110 may be provided in a region of the absorbent body 350 corresponding to the connecting portion 330 or in a region corresponding to the front portion 320, as long as it is within the region 302 corresponding to the urethral meatus. In other words, the position of the first diaper sensor 110 can be changed as desired within the region 302 corresponding to the urethral meatus, making it suitable for use by users of all genders. In the example shown in FIG. 6, the first diaper sensor 110 is disposed in a position in which the longitudinal direction of the first diaper sensor 110 is the front-rear direction.

[0050] The second diaper sensor 120 is preferably arranged, for example, along the periphery of a part of the disposable diaper body 301 other than the part 302 corresponding to the external urethral meatus (for example, the upper edge 310a of the rear part 310 or the lower edge of the front part 320). In this embodiment, the second diaper sensor 120 is disposed, for example, on the outer periphery of the disposable diaper body 301 (for example, on the back side). This allows the second diaper sensor 120 to detect urine leaking from the disposable diaper body 301 more reliably. More specifically, the second diaper sensor 120 is provided, for example, along the upper edge 310a of the rear portion 310, which is located on the back side of the user. The second diaper sensor 120 is also disposed, for example, with its longitudinal direction aligned with the left-right direction.

[0051] However, in the present invention, the shape, orientation, placement, and posture of each of the first diaper sensor 110 and the second diaper sensor 120 are not particularly limited, and can be set appropriately depending on the size and purpose of the disposable diaper body 301, etc. More specifically, for example, each of the first diaper sensor 110 and the second diaper sensor 120 may be disposed such that one surface (one surface 21a) of the wetness detection sensor faces the disposable diaper body 301 and the other surface (other surface 11b) of the wetness detection sensor faces the user's skin. Alternatively, for example, the second diaper sensor 120 may be formed in a strip shape and provided along the upper edge 310a of the rear portion 310. In this case, the second conductive pattern 40 is preferably provided at a plurality of locations along the longitudinal direction of the second diaper sensor 120. Furthermore, in the present invention, the number of each of the first diaper sensors 110 and the second diaper sensors 120 that the disposable diaper 300 has is not particularly limited, and the number of each of the first diaper sensors 110 and the second diaper sensors 120 that the disposable diaper 300 has may be two or more. In this case, for example, a plurality of first diaper sensors 110 may be arranged side by side in the front-to-rear direction in the region 302 corresponding to the external urethral meatus. Also, a plurality of second diaper sensors 120 may be arranged side by side along the upper edge 310a of the rear portion 310.

[0052] Furthermore, the present invention is not limited to the above example, and may be, for example, a disposable diaper kit including the disposable diaper 300 and a urine leakage pad (not shown). In this case, the urine leakage pad has a urine leakage pad main body (not shown) and a pad side sensor part provided on the urine leakage pad main body, and the pad side sensor part is the diaper sensor 100. The disposable diaper 300 also includes a disposable diaper body 301 and a diaper sensor 100 provided in a location on the disposable diaper body 301 that is different from a location 302 corresponding to the external urethral meatus. The incontinence pad has, for example, an adhesive layer for attaching the incontinence pad to the disposable diaper body 301, and is used by attaching it to the disposable diaper body 301. With this configuration, when a user urinates into the incontinence pad, the pad sensor can detect the user's urination. Also, when the user's urine leaks from the incontinence pad, the diaper sensor 100 can detect the urine leakage. In other words, the user's urination and urine leakage from the incontinence pad can be detected separately.

[0053] Next, a method for manufacturing the first diaper sensor 110 in this embodiment will be described. The manufacturing method of the first diaper sensor 110 in this embodiment includes the steps of preparing a substrate 10, preparing a soluble layer 21 on which a second conductive pattern 40 is formed, and assembling the substrate 10 and the soluble layer 21 together. In the step of preparing the substrate 10, the substrate 10 (see FIG. 4) is prepared, which has a base material 11, a first conductive pattern 30 formed on the base material 11, and a mounting component 50 electrically connected to the first conductive pattern 30. In the step of preparing the fusible layer 21, the second conductive pattern 40 is formed on the other surface 21b of the fusible layer 21 by printing. In the process of assembling the substrate 10 and the fusible layer 21 to each other, the circuit 60 is configured complementarily by the first conductive pattern 30 and the second conductive pattern 40, and the substrate 10 and the fusible layer 21 are assembled to each other so that the portion of the base material 11 corresponding to the second conductive pattern 40 becomes the missing portion 12. That is, the substrate 10 and the fusible layer 21 are aligned so as to face each other, and then the substrate 10 and the fusible layer 21 are bonded to each other. This completes the first diaper sensor 110 of this embodiment. The second diaper sensor 120 can also be obtained by the same manufacturing method as above.

[0054] The substrate 10 and the fusible layer 21 can be bonded together by thermocompression bonding (thermal lamination) the substrate 10 and the fusible layer 21 to each other. For example, the step of thermocompression bonding the substrate 10 and the fusible layer 21 to each other is preferably carried out at a temperature of 80°C or higher and 150°C or lower, more preferably 100°C or higher and 120°C or lower. The heating time can be, for example, about 5 to 10 seconds. The thermocompression bonding step is preferably carried out under a pressure of 0.3 MPa or higher and 3.0 MPa or lower, and more preferably under a pressure of 1.0 MPa or higher and 2.0 MPa or lower. By bonding the substrate 10 and the fusible layer 21 together in this manner, the second conductive pattern 40 can be electrically connected to the first conductive pattern 30 in a satisfactory manner.

[0055] The method for forming the notched portion 12 in the substrate 10 is not particularly limited, but as an example, it is formed by punching, and a typical method is to mainly use a blade or punch. However, the present invention is not limited to this example, and for example, laser processing or the like can also be applied.

[0056] <Modification> Next, a modified example will be described with reference to FIGS. Book Variations The diaper sensor 100 according to the present invention differs from the diaper sensor 100 according to the above embodiment in the respects described below, but is otherwise configured in the same manner as the diaper sensor 100 according to the above embodiment.

[0057] In the above embodiment, an example was described in which the fusible layer 21 was laminated on the substrate 11 via the first conductive pattern 30 and the second conductive pattern 40, but in the case of this modified example, as shown in Figures 7 and 8, the substrate 11 is laminated directly on the fusible layer 21.

[0058] More specifically, in the case of this modified example, in the wetness detection sensor unit 90, the fusible layer 21 is disposed under the other surface 11b of the base material 11, while a portion of the second conductive pattern 40 is laminated on the first conductive pattern 30. In other words, the substrate 10 including the base material 11 and the first conductive pattern 30 is disposed between the portion of the second conductive pattern 40 and the fusible layer 21 in the vertical direction. That is, in this modified example, the surface of the wetness detection sensor 90 that comes into contact with the wearer's skin is formed by one surface 40a of the second conductive pattern 40, and the surface of the wetness detection sensor 90 opposite to the surface that comes into contact with the wearer's skin (i.e. paper The surface (on the diaper body 301 side) is formed by the other surface 21b of the soluble layer 21. This configuration allows urine leaking from the disposable diaper body 301 to easily come into contact with the soluble layer 21 and ultimately with the circuit 60. This allows the diaper sensor 100 to detect urine leakage more reliably.

[0059] More specifically, in this modified example, as in the above embodiment, Base material 11 In the figure, the portion corresponding to the second conductive pattern 40 is The substrate 11 A missing portion 12 is formed. A part of the second conductive pattern 40 enters the inside of the missing portion 12 and is connected to one surface 21a of the fusible layer 21 via the missing portion 12. In this way, the second conductive pattern 40 and the fusible layer 21 are connected to each other with the substrate 10 therebetween.

[0060] In the case of this modified example, when forming the second conductive pattern 40, first, the substrate 10 is laminated directly on one surface 21a of the fusible layer 21. Then, the second conductive pattern 40 is formed by printing on the first conductive pattern 30 and throughout the inside of the missing portion 12.

[0061] Although the embodiments have been described above with reference to the drawings, these are merely examples of the present invention, and various configurations other than those described above can also be adopted.

[0062] For example, in the above, the first diaper sensor 110 and the second Diaper Sensor 120 Although the first diaper sensor 110 and the second diaper sensor 111 are configured similarly to each other, the present invention is not limited to this example. Diaper Sensor 120 may have different configurations. In this case, a plurality of second conductive patterns are provided for at least one of the first diaper sensor 110 and the second diaper sensor 120. 40 The base material 11 has a plurality of missing portions 12 corresponding to the plurality of second conductive patterns 40, respectively.

[0063] Furthermore, in the above description, an example has been described in which the diaper sensor 100 is provided with both the first water-absorbent sheet 81 and the second water-absorbent sheet 83, but the present invention is not limited to this example, and the diaper sensor 100 may be provided with only one of the first water-absorbent sheet 81 and the second water-absorbent sheet 83. In this case, for example, it is preferable that the first diaper sensor 110 comprises a first absorbent sheet 81 interposed between the highly water-permeable sheet 85 and the wetness detection sensor unit 90, and a second absorbent sheet 83 arranged on the opposite side of the highly water-permeable sheet 85 with respect to the wetness detection sensor unit 90. By doing so, the urine of the user can be supplied to the circuit 60 more easily via the highly water-permeable sheet 85 and the first water-absorbent sheet 81. Furthermore, for example, it is preferable that the second diaper sensor 120 comprises a first absorbent sheet 81 interposed between the highly water-permeable sheet 85 and the wetness detection sensor unit 90, and a second absorbent sheet 83 arranged on the opposite side of the highly water-permeable sheet 85 with respect to the wetness detection sensor unit 90. By doing so, urine leaking from the disposable diaper body 301 side can be absorbed well by the second absorbent sheet 83, and the urine can be supplied to the circuit 60 more easily.

[0064] Furthermore, although the above describes an example in which the first absorbent sheet 81 is directly laminated on one side of the wetness detection sensor unit 90, the present invention is not limited to this example, and the diaper sensor 100 may have a sheet-like spacer (not shown) interposed between the first absorbent sheet 81 and one side of the wetness detection sensor unit 90, and the portion of the spacer corresponding to the second conductive pattern 40 may be missing. Similarly, although an example has been described in which the other surface of the wetness detection sensor unit 90 is directly laminated on the second absorbent sheet 83, the present invention is not limited to this example, and the diaper sensor 100 may have a sheet-like spacer (not shown) interposed between the second absorbent sheet 83 and the other surface of the wetness detection sensor unit 90, and the portion of the spacer corresponding to the second conductive pattern 40 may be a missing portion.

[0065] Furthermore, in the above description, an example has been given in which the mounted component 50 is an RFID chip, but the present invention is not limited to this example, and the mounted component 50 may be other electronic components, such as a capacitor or resistor.

[0066] Furthermore, in the above description, an example has been described in which the second conductive pattern 40 is provided between a first portion of the first conductive pattern 30 and a second portion of the first conductive pattern 30 that is separated from the first portion with the missing portion 12 sandwiched therebetween, but the present invention is not limited to this example, and the second conductive pattern 40 may not be provided between the first conductive patterns 30 but may simply be connected to the first conductive pattern 30. A simple example is one in which the left half of the circuit 60 shown in FIG. 1 is formed by the first conductive pattern 30 and the right half is formed by the second conductive pattern 40.

[0067] Furthermore, in the above description, an example has been described in which the substrate 10 has two notches 12, but the number of notches 12 that the substrate 10 has is not particularly limited, and may be, for example, three or more.

[0068] The present embodiment encompasses the following technical ideas. (1) A diaper sensor having a sheet-like wetness detection sensor portion including a circuit that breaks or is damaged by being wet with liquid, a highly water-permeable sheet that forms a surface of the diaper sensor that is placed on the user's body surface; At least one of a first water-absorbent sheet interposed between the highly water-permeable sheet and the wetness detection sensor unit, and a second water-absorbent sheet arranged on the opposite side of the wetness detection sensor unit from the highly water-permeable sheet side; A diaper sensor comprising: (2) The diaper sensor according to (1), which includes both the first water-absorbent sheet and the second water-absorbent sheet. (3) The wetness detection sensor unit a substrate having a base material, a first conductive pattern formed on the base material, and a mounting component electrically connected to the first conductive pattern; a second conductive pattern that configures the circuit in a complementary manner to the first conductive pattern; Equipped with a portion of the base material corresponding to the second conductive pattern is a missing portion; The diaper sensor according to (1) or (2), wherein the second conductive pattern is soluble in a liquid or becomes weak when wetted with a liquid. (4) A plurality of the second conductive patterns are provided, The diaper sensor according to (3), wherein the base material has a plurality of the missing portions corresponding to the plurality of second conductive patterns, respectively. (5) The diaper sensor according to any one of (1) to (4), wherein the diaper sensor is formed in a sheet shape. (6) A disposable diaper body; a first diaper sensor provided at a position on the disposable diaper body corresponding to the external urethral meatus; a second diaper sensor provided at a location on the disposable diaper body different from the location of the first diaper sensor; Equipped with A disposable diaper, wherein each of the first diaper sensor and the second diaper sensor is the diaper sensor according to any one of (1) to (5). (7) The disposable diaper according to (6), wherein the second diaper sensor is disposed on the peripheral edge of the disposable diaper body. (8) A disposable diaper body; The diaper sensor according to any one of (1) to (5), which is provided in a location on the disposable diaper body different from a location corresponding to the external urethral meatus; A disposable diaper equipped with: (9) The paper diaper according to (8), Urinary incontinence pads and A paper diaper kit comprising: The urine leakage pad has a urine leakage pad main body and a pad side sensor part provided on the urine leakage pad main body, A disposable diaper kit, wherein the pad-side sensor unit is a diaper sensor according to any one of (1) to (5). [Explanation of symbols]

[0069] 10 Substrate 11 Base material 11a One side 11b The other side 12 Missing parts 21 Soluble layer 21a One side 21b The other side 30 First conductive pattern 30a, 30b ends 31a, 31b wide section 32a, 32b zigzag section 33a, 33b, 34a, 34b Linear pattern components 35 Connecting part 36a, 36b, 37a, 37b, 38a, 38b, 39a, 39b, 301a, 301b Annular pattern component 40 Second conductive pattern 41a, 41b, 42a, 42b, 43a, 43b Bridge section 50 Mounting parts 60 circuits 81 First water absorption sheet 83 Second water absorption sheet 85 Highly permeable sheet 88 double-sided tape 90 Wetness detection sensor 100 Diaper Sensor 110 First diaper sensor 120 Second diaper sensor 300 disposable diapers 301 Disposable diaper body 302 Area corresponding to the external urethral meatus 310 rear 310a Upper edge 320 front 330 Connection section 340 hook-and-loop fastener 350 absorber

Claims

1. A diaper sensor having a sheet-like wetness detection sensor unit including a circuit that breaks or is damaged when wet with liquid, a highly water-permeable sheet that forms a surface of the diaper sensor that is placed on the user's body surface; a first water-absorbent sheet interposed between the highly water-permeable sheet and the wetness detection sensor; a second water-absorbent sheet disposed on the opposite side of the wetness detection sensor unit from the highly water-permeable sheet; Equipped with The wetness detection sensor unit a substrate having a base material, a first conductive pattern formed on one surface of the base material, and a mounting component electrically connected to the first conductive pattern; a second conductive pattern that configures the circuit in a complementary manner to the first conductive pattern; Equipped with In a plan view, a portion of the base material that overlaps with the second conductive pattern is a missing portion, the missing portion penetrates the base material in a thickness direction of the base material, The second conductive pattern is soluble in liquid or becomes weak when wetted with liquid.

2. A diaper sensor as described in claim 1, wherein the second conductive pattern is arranged across the missing portion and is bridged between a first portion in the first conductive pattern and a second portion in the first conductive pattern that is separated from the first portion with the missing portion in between, thereby electrically connecting the first portion and the second portion to each other.

3. a plurality of the second conductive patterns; The diaper sensor according to claim 1 , wherein the base material has a plurality of the notches corresponding to the plurality of second conductive patterns, respectively.

4. The diaper sensor according to any one of claims 1 to 3, wherein the diaper sensor is formed in a sheet shape.

5. The disposable diaper itself, a first diaper sensor provided at a position on the disposable diaper body corresponding to the external urethral meatus; a second diaper sensor provided at a location on the disposable diaper body different from the location of the first diaper sensor; Equipped with A disposable diaper, wherein each of the first diaper sensor and the second diaper sensor is the diaper sensor according to any one of claims 1 to 3.

6. The disposable diaper according to claim 5, wherein the second diaper sensor is disposed on a peripheral edge of the disposable diaper body.

7. The disposable diaper itself, The diaper sensor according to any one of claims 1 to 3, which is provided in a region of the disposable diaper body different from a region corresponding to the external urethral meatus; A disposable diaper equipped with:

8. The paper diaper according to claim 7; Urinary incontinence pads and A paper diaper kit comprising: The urine leakage pad has a urine leakage pad main body and a pad side sensor part provided on the urine leakage pad main body, The disposable diaper kit, wherein the pad-side sensor portion is the diaper sensor according to any one of claims 1 to 4.

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