| 摘要 |
<p>PURPOSE:To improve the detecting accuracy and the sensitivity, and also to make an unbalanced output voltage extremely small by fixing a nonmagnetic conductive member to at least both end faces of a core so that an influence by a leakage flux is suppressed. CONSTITUTION:A nonmagnetic conductive member, for instance, annular members 15, 15 formed by copper are fixed to both end faces of a core 6. As for this annular member 15, its axial length is set to a length which has added about 1/2 of the axial length of secondary coils 2, 3 and a moving extent of the core 6. Also, a stepped part 15a which has been formed in the inside end face is pressed in, fitted and fixed to a stepped part 6c which has been formed in the opposed end face of the core 6. As a result, even in case the core 6 is displaced up to its maximum displacement quantity in any direction of the right and left in a bobbin 1, each annular member 15, 15 is lapped with the opposed secondary coils 2, 3, and an influence of a leakage flux by a shaft 5 to each secondary coil can be eliminated. In such a way, the detecting sensitivity and the detecting accuracy are improved, and a balance of output voltages of two secondary coils becomes good.</p> |
