Temperature sensor

A temperature sensor comprising:

• a thermistor;
• a first lead-out wire having a front end connected to the thermistor;
• a second lead-out wire having a front end connected to the thermistor;
• a glass body for sealing the thermistor, a front end portion of the first lead-out wire and a front end portion of the second lead-out wire;
• a first lead wire having a front end connected to a rear end of the first lead-out wire;
• a second lead wire having a front end connected to a rear end of the second lead-out wire;
• a first connecting section for connecting the rear end of the first lead-out wire to the front end of the first lead wire;
• a second connecting section for connecting the rear end of the second lead-out wire to the front end of the second lead wire;
• and
• a synthetic resin cover layer,
• wherein:
• the synthetic resin cover layer is formed of a laminate of an inner layer and a tubular outer layer;
• the glass body has a cylindrically-shaped peripheral surface;
• the tubular outer layer covers the cylindrically-shaped peripheral surface of the glass body such that the cylindrically-shaped peripheral surface of the glass body is in direct contact with an inner surface of the tubular outer layer;
• the inner layer covers the first lead-out wire except for the front end portion of the first lead-out wire;
• the inner layer covers the second lead-out wire except for the front end portion of the second lead-out wire;
• the inner layer covers a front end portion of the first lead wire;
• the inner layer covers a front end portion of the second lead wire;
• the first connecting section is positioned longitudinally forward of the second connecting section;
• the synthetic resin cover layer has:
• (i) a front section;
• (ii) a first diameter-increasing section which extends from the front section and increases backward in outer diameter;
• (iii) an intermediate section which extends from the first diameter-increasing section;
• (iv) a second diameter-increasing section which extends from the intermediate section and increases backward in outer diameter;
• and (v) a rear section which extends from the second diameter-increasing section;
• an outer diameter of the front section is smaller than an outer diameter of the rear section;
• the first connecting section is positioned so as to bridge a rear end portion of the first diameter-increasing section and a front end portion of the intermediate section;
• and
• the second connecting section is positioned so as to bridge a rear end portion of the second diameter-increasing section and a front end portion of the rear section.