Temperature sensor and rotary electric machine

1 . A temperature sensor comprising:

a sensor element including a heat-sensitive body, a pair of lead wires that is electrically connected with the heat-sensitive body, a sealing layer made of glass that covers the heat-sensitive body and a part of the pair of lead wires, and a pair of lead terminals that is electrically connected with the pair of lead wires; and

a holder that holds the sensor element, wherein the holder includes

a heat-sensitive surface configured to receive heat from a measurement object,

a reference surface provided on a back side of the heat-sensitive surface, and

a pressing body that is provided on the reference surface and presses the heat-sensitive body against the reference surface through the sealing layer, and

wherein the sensor element is accommodated inside the holder such that the sealing layer made of glass abuts against the reference surface.

2 . The temperature sensor according to claim 1 , wherein

the holder includes a forward side on which the heat-sensitive body is arranged and a rearward side on which the pair of lead wires is drawn out,

the pressing body includes a pair of pressing pieces in a width direction in which the heat-sensitive body is sandwiched,

each of the pair of pressing pieces includes a flange that presses the heat-sensitive body against the reference surface, and

a dimension of the flange from the reference surface is decreased from the rearward side toward the forward side of the heat-sensitive body.

3 . The temperature sensor according to claim 2 , wherein

a gap between the pair of pressing pieces is narrowed from the rearward side toward the forward side of the heat-sensitive body.

4 . The temperature sensor according to claim 2 , comprising a pair of positioning pieces provided on the rearward side relative to the pair of pressing pieces, with a predetermined gap therebetween.

5 . The temperature sensor according to claim 1 , wherein

the holder includes an accommodating space that is provided so as to face the reference surface and accommodates the sensor element, and

the sensor element is sealed by a resin mold with which the accommodating space is filled.

6 . The temperature sensor according to claim 5 , wherein

the holder includes a facing surface that opposes a support body on which the holder is placed when a temperature of the measurement object is detected,

the facing surface includes a first facing surface of the resin mold and a second facing surface of an accommodating frame that encloses a circumference of the resin mold, and

the first facing surface is dented to a side of the heat-sensitive surface relative to the second facing surface.

7 . The temperature sensor according to claim 5 , wherein

the holder includes a partition that serves for positioning of the pair of lead terminals in an interior of the accommodating space, and

the partition includes

a base that stands from the reference surface and extends in a length direction orthogonal to a width direction in which the heat-sensitive body is sandwiched, and

a terminal pressing member that projects from a top portion of the base in the width direction.

8 . A rotary electric machine comprising the temperature sensor according to claim 1 .

9 . The temperature sensor according to claim 3 , comprising a pair of positioning pieces provided on the rearward side relative to the pair of pressing pieces, with a predetermined gap therebetween.

10 . The temperature sensor according to claim 6 , wherein

the holder includes a partition that serves for positioning of the pair of lead terminals in an interior of the accommodating space, and

the partition includes

a base that stands from the reference surface and extends in a length direction orthogonal to a width direction in which the heat-sensitive body is sandwiched, and

a terminal pressing member that projects from a top portion of the base in the width direction.