| 摘要 |
A self holding type connecting device comprising an armature which is disposed movably in an axial direction, a magnetic path member having a cross section formed along a closed loop and having an axial space wherein axial movement of the armature is permitted, a permanent magnet secured to the magnetic path member and forming two kinds of magnetic flux which pass through the armature and the magnetic path member, an electric magnetic coil which forms magnetic flux for moving the armature in an axial direction against the two kinds of magnetic flux, and switch for switching direction of the magnetic flux from the electric magnetic coil. In the device, decrease of connecting force due to abrasion of pads does not occur and power consumption can be remarkably reduced.
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