Yoke means, the yoke unit manufacturing method, the torque detection device and an electric power steering device

Yoke unit (50) comprising: a first yoke (60), a second yoke (70) and a resin portion (80). First yoke (60) having a first plurality of magnetic pole teeth (61). A second yoke (70) having a second plurality of magnetic pole teeth (71). A first plurality of magnetic pole teeth (61) and a second magnetic pole teeth (71) are alternately arranged. The resin portion (80) of the magnetic yoke (60, 70) integral. On the inner surface (81) of the resin portion (80) is formed with a recess (82) between the first magnetic pole tooth (61) and a second pole tooth (71).