Since the fixing member 35 and the protruding piece 33b of the bobbin 33 are arranged as described above, the bobbin 33 is prevented from moving to the outer side in the radial direction. Specifically, the claw portion 33c is caught by the annular protruding portion 35a of the fixing member 35, and thus, the bobbin 33 is prevented from moving to the outer side in the radial direction. That is, the protruding piece 33b of the bobbin 33 is fixed to the core back 31a by the fixing member 35 in the stator 30 of the present example embodiment. As a result, the movement of the bobbin 33 that can be attached to and detached from the teeth 31b is suppressed. According to this configuration, it is not necessary to provide a tubular member configured to prevent the bobbin 33 from coming off on the outer circumference of the stator 30, and manufacturing is facilitated.

Since the movement of the bobbin 33 in the radial direction is suppressed by using the claw portion 33c provided on the protruding piece 33b in the present example embodiment, the bobbin 33 does not have a complicated structure and can be easily manufactured. Since all the bobbins 33 are fixed together by the annular fixing member 35, the number of parts can be reduced, and the assembly work of the stator 30 can be made efficient.

As illustrated in FIGS. 8 and 11, the sensor S is provided in one of the bobbins 33 as an example. The sensor S is fixed to the coil 32 wound around the bobbin 33. The sensor S is bonded to the coil 32 using an adhesive.