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JP-2026075393-A - Body fluid detection device, body fluid detection connector, and body fluid detection method

JP2026075393AJP 2026075393 AJP2026075393 AJP 2026075393AJP-2026075393-A

Abstract

[Problem] To easily electrically connect a body fluid detection device to an absorbent article having a thread-like conductive member to detect leakage of body fluids. [Solution] The present disclosure relates to a body fluid detection device, wherein the light incontinence pad has at least one thread-like conductive member on one side and at least one thread-like conductive member on the other side, spaced apart from each other in the width direction, the conductive members on one side and the conductive members on the other side extend in the longitudinal direction of the light incontinence pad, and the connector of the body fluid detection device has a pair of terminal portions 107, the pair of terminal portions 107 have a plurality of square pyramidal protrusions 108 arranged in a grid, and the two directions constituting the grid arrangement of the plurality of protrusions 108 are inclined with respect to a reference direction perpendicular to the axial direction of the hinge axis. [Selection Diagram] Figure 7

Inventors

  • 黒須 一博
  • 高橋 桂子
  • 葭葉 椋子
  • 野正 竜太郎

Assignees

  • 日本製紙クレシア株式会社
  • Ｌａｓｉｉｎａ株式会社

Dates

Publication Date
20260508
Application Date
20241022

Claims (10)

  1. An absorbent article having a liquid-permeable skin-side sheet, a liquid-impermeable non-skin-side sheet, and an absorbent material disposed between the skin-side sheet and the non-skin-side sheet, A body fluid detection device comprising a power supply, a measuring unit, and a connector formed to be openable and closable around a hinge axis and detachable from the absorbent article, The absorbent article has, within the absorbent article, at least one thread-like conductive member on one side and at least one thread-like conductive member on the other side, spaced apart from each other in the width direction, with the center line in the width direction of the absorbent article in between. The conductive member on one side and the conductive member on the other side of the absorbent article extend in the longitudinal direction of the absorbent article. The connector of the bodily fluid detection device has a pair of terminals that are electrically connected to the power supply and are spaced apart from each other in the axial direction of the hinge shaft. The pair of terminal portions of the connector have a plurality of square pyramidal protrusions arranged in a grid pattern, The two directions that constitute the grid-like arrangement of the plurality of protrusions are inclined with respect to a reference direction perpendicular to the axial direction of the hinge axis. The pair of terminal portions of the connector are such that, when the connector is attached to the absorbent article, one terminal portion is electrically connected to the conductive member on one side, and the other terminal portion is electrically connected to the conductive member on the other side. The body fluid detection device is characterized in that the measurement unit of the body fluid detection device detects body fluid based on the time-series change in the degree of current flow between the conductive member on one side and the conductive member on the other side of the absorbent article.
  2. The length of the terminal portion in the reference direction is 1.5 mm or more and 6.0 mm or less. The axial length of the hinge shaft of the terminal portion is 5 mm or more and 25 mm or less. The angle of the vertices in the cross-section along the opposing side edges of the multiple square pyramidal protrusions of the terminal portion is 30 degrees or more and 60 degrees or less. The length of the base of the projection on the terminal portion is 0.2 mm or more and 1.0 mm or less. The distance between the vertices of adjacent protrusions is 100% or more and 150% or less of the length of the base of the protrusion. The bodily fluid detection device according to claim 1, characterized in that the angle of one of the two directions constituting the grid-like arrangement of the plurality of protrusions with respect to the reference direction is greater than 0 degrees and 45 degrees or less.
  3. The bodily fluid detection device according to claim 1 or 2, characterized in that the distance between at least one of the conductive members on one side of the absorbent article and at least one of the conductive members on the other side is 10 mm or more and less than 50 mm.
  4. The body fluid detection device according to claim 1 or 2, characterized in that the conductive member of the absorbent article is made by bundling together a plurality of fibers, each of which has a conductive metal plated on the surface of a nylon fiber, to form a single strand.
  5. The body fluid detection device according to claim 1 or 2, characterized in that the conductive member of the absorbent article is arranged substantially linearly parallel to the longitudinal direction.
  6. A body fluid detection device that is detachable from an absorbent article, comprising a liquid-permeable skin-side sheet, a liquid-impermeable non-skin-side sheet, an absorbent disposed between the skin-side sheet and the non-skin-side sheet, and at least one pair of thread-like conductive members disposed on both sides in the width direction and extending in the longitudinal direction, A power supply for supplying current to the pair of conductive members of the absorbent article, A measuring unit that detects bodily fluids based on the time-series change in the degree of current flow between one conductive member and the other conductive member of the pair of conductive members of the absorbent article, It comprises a connector formed to be openable and closable around a hinge axis and detachable from the absorbent article, The connector has a pair of terminals that are electrically connected to the power supply and are spaced apart from each other in the axial direction of the hinge shaft. The pair of terminal portions of the connector have a plurality of square pyramidal protrusions arranged in a grid pattern, The two directions that constitute the grid-like arrangement of the plurality of protrusions are inclined with respect to a reference direction perpendicular to the axial direction of the hinge axis. A body fluid detection device characterized in that, when the connector is attached to the absorbent article, one terminal portion of the connector is electrically connected to the conductive member on one side, and the other terminal portion is electrically connected to the conductive member on the other side.
  7. The bodily fluid detection device according to claim 6, characterized in that the current supplied from the power source to the conductive member on one side and the conductive member on the other side of the absorbent article is 1 mA or less.
  8. A connector for a device that electrically connects to a pair of conductive members laid on an absorbent article, The connector has a pair of terminals electrically connected to the power supply of the device, is formed to be openable and closable around a hinge axis, and is detachable from the absorbent article. The pair of terminal portions have multiple square pyramidal protrusions arranged in a grid pattern, The two directions that constitute the grid-like arrangement of the plurality of protrusions are inclined with respect to a reference direction perpendicular to the axial direction of the hinge axis. The connector is characterized in that, when the connector is attached to the absorbent article, one terminal portion is electrically connected to one of the pair of conductive members, and the other terminal portion is electrically connected to the other of the pair of conductive members.
  9. The length of the terminal portion in the reference direction is 1.5 mm or more and 6.0 mm or less. The axial length of the terminal portion is 5 mm or more and 25 mm or less. The angle of the vertex in the cross-section along the opposing side edges of the square pyramidal projection of the terminal portion is 30 degrees or more and 60 degrees or less. The length of the base of the projection on the terminal portion is 0.2 mm or more and 1.0 mm or less. The distance between the vertices of adjacent protrusions is 100% or more and 150% or less of the length of the base of the protrusion. The connector according to claim 8, characterized in that the angle of one of the two directions constituting the grid-like arrangement of the plurality of protrusions with respect to the reference direction is greater than 0 degrees and 45 degrees or less.
  10. A body fluid detection method for detecting body fluids in an absorbent article, which has a liquid-permeable skin-side sheet, a liquid-impermeable non-skin-side sheet, and an absorbent material disposed between the skin-side sheet and the non-skin-side sheet, wherein a body fluid detection device is attached to the absorbent article, which has a power supply, a measuring unit, and a connector formed to be openable and closable around a hinge axis and detachable from the absorbent article, The absorbent article has, within the absorbent article, at least one thread-like conductive member on one side and at least one thread-like conductive member on the other side, spaced apart from each other in the width direction, with the center line in the width direction of the absorbent article in between. The conductive member on one side and the conductive member on the other side of the absorbent article extend in the longitudinal direction of the absorbent article. The connector of the bodily fluid detection device has a pair of terminals that are electrically connected to the power supply and are spaced apart from each other in the axial direction of the hinge shaft. The pair of terminal portions of the connector have a plurality of square pyramidal protrusions arranged in a grid pattern, The two directions that constitute the grid-like arrangement of the plurality of protrusions are inclined with respect to a reference direction perpendicular to the axial direction of the hinge axis. By attaching the connector to the absorbent article, one of the pair of terminals of the connector is electrically connected to the conductive member on one side, and the other terminal is electrically connected to the conductive member on the other side. A method for detecting body fluids, characterized by detecting body fluids based on the time-series change in the degree of current flow between the conductive member on one side and the conductive member on the other side of the absorbent article.

Description

This disclosure relates to a device for detecting bodily fluids such as urine, a bodily fluid detection device, a connector, and a method for detecting bodily fluids. Patent Document 1 discloses a wearable article with a sensor. This wearable article has a urination sensor attached to one of several sheets that make up the article. The urination sensor comprises a printed substrate made of a resin film, multiple printed electrodes forming a sensor element using conductive ink applied to the surface of the printed substrate, a conductive wire portion connecting these printed electrodes, and a terminal portion to which the conductive wire portion is connected. The printed substrate has ventilation openings that function as ventilation areas. The urination sensor has printed electrodes in close contact with the surface of the back sheet of the urine pad, and is covered with a coating sheet coated with adhesive, and attached to the back sheet of the urine pad. Japanese Patent Publication No. 2017-189348 This diagram schematically shows the overall configuration of the body fluid detection device in the embodiment.This is a cross-sectional view taken along the line I-I in Figure 1(A) of a light incontinence pad for a bodily fluid detection device, according to an embodiment of the present invention.This is a schematic plan view showing how the conductive portion is formed on the surface of the non-skin side sheet of the light incontinence pad according to the embodiment.This is a plan view illustrating the spacing between the conductive parts (conductive threads) of the light incontinence pad according to the embodiment.Figure 1 is a side view of the connector of the bodily fluid detection device, where (A) shows the closed state and (B) shows the open state.This is a perspective view of the open connector of a bodily fluid detection device.This is a plan view of the terminal section of a body fluid detection device.This is a cross-sectional view taken along the line VIII-VIII in Figure 7.This is an enlarged view of section IX in Figure 7.This is a schematic plan view showing the state in which the connector shown in Figure 5 is attached to the longitudinal end of the light incontinence pad according to the embodiment. The embodiments of the present invention will be described below with reference to the accompanying drawings. In the embodiments described below, a body fluid detection device 100 according to one embodiment of the present invention is incorporated into a body fluid detection device 1 according to one embodiment of the present invention shown in Figure 1. Furthermore, in the embodiments described below, a body fluid detection method according to one embodiment of the present invention is applied to the detection of body fluid in an absorbent article (specifically, a light incontinence pad 2) of the body fluid detection device 1 according to one embodiment of the present invention shown in Figure 1. Note that the figures do not define the relative sizes or shapes of the components. In the following explanation, the following definitions apply: Wearing the light incontinence pad 2 means the state in which the light incontinence pad 2 is attached to the body (specifically, the lower body, lower abdomen), regardless of whether or not bodily fluids have been absorbed. The light incontinence pad 2 is attached to the body inside clothing, but it may also be attached to the body so that at least a part of it is exposed to the outside. The longitudinal direction is the direction that runs from the front to the back of the body through the wearer's crotch when the light incontinence pad 2 is worn, and is the X-axis direction in each figure. The width direction is the direction perpendicular to the longitudinal direction, and is the Y-axis direction in each figure. The thickness direction is the direction perpendicular to the longitudinal and width directions, and is the direction in which each component is stacked, and is the Z-axis direction in each figure. A plane is the X-Y plane along the X-axis and Y-axis in each figure. A longitudinal side is a side along the longitudinal direction, and is the X-Z plane along the X-axis and Z-axis in each figure. The longitudinal section is a cross-section along the longitudinal direction, specifically the X-Z section along the X and Z axes in each figure. The width side is a side along the width direction, specifically the Y-Z plane along the Y and Z axes in each figure. The skin side is the surface that contacts the wearer's skin or faces the skin when the light incontinence pad 2 is worn, and is the side in the direction of the Z-axis arrow in each figure. The non-skin side is the surface that contacts the wearer's clothing or faces the clothing when the light incontinence pad 2 is worn, and is the side opposite to the direction of the Z-axis arrow in each figure. Body fluids refer to liquids expelled from the body, such as urine, blood, and water in loose stools.