초록 ▼

An electromagnetically controlled spring clutch mechanism comprising an output rotating element, an input rotating element, a first boss member rotating as a unit with the input rotating element, a second boss member rotating as a unit with the output rotating element, a coil spring means fitted ove

An electromagnetically controlled spring clutch mechanism comprising an output rotating element, an input rotating element, a first boss member rotating as a unit with the input rotating element, a second boss member rotating as a unit with the output rotating element, a coil spring means fitted over and across the first and second boss members, a rotation control member for hampering the contraction of the coil spring, a movably mounted armature, a biasing device for biasing the armature toward the rotation control member, and an electromagnetic device for magnetically attracting the armature. When the electromagnetic device is deenergized, the armature acts on the rotation control member by the action of the biasing device whereby the contraction of the coil spring is hampered. When the electromagnetic device is energized, the armature is moved away from the rotation control member by the magnetic attracting force of the electromagnetic device whereby the coil spring is contracted.

대표청구항 ▼

An electromagnetically controlled spring clutch mechanism comprising an output rotating element mounted rotatably, an input rotating element mounted on the output rotating element for free rotation relative to the output rotating element, a first boss member adapted to rotate as a unit with the inpu

An electromagnetically controlled spring clutch mechanism comprising an output rotating element mounted rotatably, an input rotating element mounted on the output rotating element for free rotation relative to the output rotating element, a first boss member adapted to rotate as a unit with the input rotating element, a second boss member provided adjacent to the first boss member and adapted to rotate as a unit with the output rotating element, a coil spring means fitted over and across the first and second boss members and drivingly connected said two boss members by its contraction, a rotation control member for hampering the contraction of the coil spring means, an armature mounted in proximity to the rotation control member for free rotation axially of the output rotating element, a biasing means for biasing the armature in a direction in which the armature approaches the rotation control member, and an electromagnetic means for magnetically attracting the armature away from the rotation control member against the biasing action of the biasing means; wherein when the electromagnetic means is deenergized, the armature is biased toward the rotation control member by the action of the biasing means and the rotation of the rotation control member is hampered whereby the contraction of the coil spring means is hampered, and when the electromagnetic means is energized, the armature is magnetically attracted in a direction away from the rotation control member by the action of the electromagnetic means and the rotation control member is free to rotate whereby the coil spring means is contracted, said electromagnetic means including a cylindrical field and a coil assembly, said field including an outside wall and having one open end surface, a coil assembly comprising a bobbin and a coil wound on the bobbin, said coil assembly being mounted within the field, said coil having a connecting wire portion, a protective member fitted to the connected wire portion of the coil, a mounting opening formed in the field and extending to said open end surface of the field, said protective member being mounted in the mounting opening from said open end surface, said field having shoulder portions extending in the mounting direction of the protective member, said shoulder portions being formed at positions of the field which define the mounting opening, said protective member having a main body portion and engaging portions, said main body portion projecting outwardly through the mounting opening and outwardly of the outside wall of the field, said engaging portions being engaged with the shoulder portions, said bobbin having a sleeve portion and flange portions, said coil being wound on said sleeve portion, said flange portions being provided at both ends of the sleeve portion, one of said flange portions being positioned at said open end surface of the field and being provided with a position setting protrusion, said position setting protrusion being positioned in the shoulder portions in the field.