Water intrusion detector for a touch sensor device

A touch sensor device comprising:

• a touch sensor unit having a sealed tubular hollow member constituted by an elastically deformable insulator and having first and second sensing electrodes extending in a longitudinal direction of the hollow member and spaced apart from each other on an inner side of the hollow member, wherein
• the touch sensor unit is configured such that the first sensing electrode and the second sensing electrode contact and electrically connect with each other based on an elastic deformation of the hollow member,
• a water intrusion detection section is provided at a position located at a lower end portion of the touch sensor unit extending in a vertical direction and, in a case where water has intruded into the hollow member, the first sensing electrode and the second sensing electrode are electrically connected via the intruding water in the water intrusion detection section,
• the water intrusion detection section is formed by disposing a first water intrusion detection electrode extending from the first sensing electrode and a second water intrusion detection electrode extending from the second sensing electrode at the position located at the lower end portion of the touch sensor unit, and
• a first interval between the first water intrusion detection electrode and the second water intrusion detection electrode is narrower than a second interval between the first sensing electrode and the second sensing electrode.