Electrolyte measuring structure, flow-type ion-selective electrode using the same, and electrolyte measuring device

An electrolyte measuring structure comprising a housing and a sealing material, and being connectable to another electrolyte measuring structure via the sealing material, wherein

• the housing includes a main body having a flow path therethrough and a fixing structure for fixing the sealing material to the main body, wherein
• the fixing structure includes a first protrusion having a first hole connected to the flow path, a second protrusion formed on an outer periphery of the first protrusion, and a fixing recess for detachably fixing the sealing material formed by the first protrusion and the second protrusion, wherein
• the sealing material includes a front surface designed to be in contact with the other electrolyte measuring structure, and a back surface designed to be in contact with the fixing structure, and is an elastic body in which a sheet region that is a sheet-like region, and a protrusion region provided on an outer peripheral side surface of the sheet region and embedded in the fixing recess are integrally molded, wherein
• the sheet region has a second hole arranged at a position corresponding to the first hole in a state where the sealing material is fixed to the fixing structure, and wherein
• in a state where the sealing material is fixed to the fixing structure and is not in contact with the other electrolyte measuring structure, a first protrusion amount defined below is larger than a second protrusion amount:
• the first protrusion amount protrudes from a front surface of the sheet region, and
• the second protrusion amount protrudes from a front surface of the protrusion region, and
• when viewed in a cross-section passing through a central axis of the second hole in a state where the sealing material is removed from the fixing structure:
• (i) a first slope defined below is smaller than a second slope:
• (ii) the first slope is an average slope of the front surface of the sheet region, and
• (iii) the second slope is an average slope of the front surface of the protrusion region.