| 摘要 |
PROBLEM TO BE SOLVED: To provide a bobbin with few measurement errors, and a magnetic field sensor.SOLUTION: A first bobbin member 12, a second bobbin member 22, and a third bobbin member 32 dispose colar portions 14, 24, and 34 on column portions 13, 23, and 33 for a coil. The collar portion 13 of the first bobbin member 12 is formed to have a diameter smaller than a diameter of the column portion 23 of the second bobbin member 22, and the collar portion 24 of the second bobbin member 22 is formed to have a diameter smaller than a diameter of the column portion 33 of the third bobbin member 32, respectively. In one diameter direction of the column portion 23 of the second bobbin member 22, a rectangular hole 25 for introducing the first bobbin member 12 is provided. In intersecting two diameter directions of the column portion 33 of the third bobbin member 32, a cross hole 35 for simultaneously introducing the first bobbin member 12 and the second bobbin member 22 which are combined is provided. Those bobbin members 12, 22, 32 are formed to enable a combination by a layout relationship in which those bobbin members intersect in three axial directions through the rectangular hole 25 and the cross hole 35. |
