A holder is used while attached to a chassis of a vibration generator that moves a vibrator to generate a vibration. The holder includes a vibrator retention unit retaining the vibrator, a fixed unit fixed to the chassis, and an arm. The arm connects the fixed unit and the vibrator retention unit, and the arm supports the vibrator retention unit while the vibrator retention unit can be displaced with respect to the fixed unit. The fixed unit, the arm, and the vibrator retention unit are integrally formed using resin.

A holder is used while attached to a chassis of a vibration generator that moves a vibrator to generate a vibration. The holder includes a vibrator retention unit retaining the vibrator, a fixed unit fixed to the chassis, and an arm. The arm connects the fixed unit and the vibrator retention unit, and the arm supports the vibrator retention unit while the vibrator retention unit can be displaced with respect to the fixed unit. The fixed unit, the arm, and the vibrator retention unit are integrally formed using resin.

In an actuator, damper members which connect a movable member and a fixed member are arranged at two places between the end portion of the shaft of the movable member on an L1 side and the opening portion of the first holder of the fixed member and between the end portion of the shaft of the movable member on an L2 side and the opening portion of a second holder. Each of the damper members includes a gel damper member serving as a connection member which is continuously arranged in a gap in a radial direction between the movable member and the fixed member over the entire circumference. In the gel damper member, an inner circumferential portion is fixed to the shaft through a cylindrical first member, and an outer circumferential portion is fixed to the fixed member through a cylindrical second member.

In an actuator, damper members which connect a movable member and a fixed member are arranged at two places between the end portion of the shaft of the movable member on an L1 side and the opening portion of the first holder of the fixed member and between the end portion of the shaft of the movable member on an L2 side and the opening portion of a second holder. Each of the damper members includes a gel damper member serving as a connection member which is continuously arranged in a gap in a radial direction between the movable member and the fixed member over the entire circumference. In the gel damper member, an inner circumferential portion is fixed to the shaft through a cylindrical first member, and an outer circumferential portion is fixed to the fixed member through a cylindrical second member.

A linear actuator for pumping comprising a stator having an inner opening, a shaft having a plurality of permanent magnets spaced linearly in the axial direction, the shaft disposed in the stator opening and configured to reciprocate linearly in the axial direction relative to the stator, the stator comprising a first stator assembly having a plurality of pole sections spaced linearly in the axial direction and a plurality of coils disposed therebetween, a second stator assembly having a plurality of pole sections spaced linearly in the axial direction and a plurality of coils disposed therebetween, a bearing assembly positioned axially between the first stator assembly and the second stator assembly, and the bearing assembly having a width that is a function of the spacing of the plurality of pole sections of the first stator assembly and the second assembly and the spacing of the plurality of permanent magnets of the shaft.

A linear actuator for pumping comprising a stator having an inner opening, a shaft having a plurality of permanent magnets spaced linearly in the axial direction, the shaft disposed in the stator opening and configured to reciprocate linearly in the axial direction relative to the stator, the stator comprising a first stator assembly having a plurality of pole sections spaced linearly in the axial direction and a plurality of coils disposed therebetween, a second stator assembly having a plurality of pole sections spaced linearly in the axial direction and a plurality of coils disposed therebetween, a bearing assembly positioned axially between the first stator assembly and the second stator assembly, and the bearing assembly having a width that is a function of the spacing of the plurality of pole sections of the first stator assembly and the second assembly and the spacing of the plurality of permanent magnets of the shaft.

A linear electric machine includes a mover and a stator. The mover includes permanent magnets, and the stator includes a ferromagnetic core-structure and windings for conducting electric currents. The linear electric machine includes support structures on both sides of the ferromagnetic core-structure and supporting the mover to be linearly movable with respect to the stator in the longitudinal direction of the linear electric machine. At least one of the support structures includes a support element arranged to keep the mover a distance away from solid metal constituting a frame-portion of the support structure. The support element includes material whose electrical conductivity is less than that of the solid metal. As the mover is kept the distance away from the solid metal, eddy currents induced by the moving permanent magnets to the solid metal are reduced.

High force and low noise linear fine-tooth motors are described herein. Such motors can include armatures having fine teeth separated by narrow slots such that a ratio of a pitch between teeth and a pitch between permanent magnet poles is less than that of a conventional iron-core linear motor. In one embodiment, such a linear motor can include a first component having an armature including a plurality of iron cores surrounded by coil windings, and a second component having a plurality of permanent magnets with alternating polarity. The plurality of iron cores can be spaced apart from one another by an iron core pitch distance and the plurality of permanent magnets can be spaced apart from one another by a permanent magnet pole pitch distance, and a ratio of the iron core pitch to the magnetic pole pitch can be less than 1.33.

High force and low noise linear fine-tooth motors are described herein. Such motors can include armatures having fine teeth separated by narrow slots such that a ratio of a pitch between teeth and a pitch between permanent magnet poles is less than that of a conventional iron-core linear motor. In one embodiment, such a linear motor can include a first component having an armature including a plurality of iron cores surrounded by coil windings, and a second component having a plurality of permanent magnets with alternating polarity. The plurality of iron cores can be spaced apart from one another by an iron core pitch distance and the plurality of permanent magnets can be spaced apart from one another by a permanent magnet pole pitch distance, and a ratio of the iron core pitch to the magnetic pole pitch can be less than 1.33.

The invention relates to the field of passive power generation devices, in particular to a toggle-type magnetic power generation device, which comprising a coil, a magnetic core, a coil bobbin and a coil support. A through groove allowing the magnetic core to penetrate through is formed in the coil bobbin. The coil is wound around the outer surface of a side wall of the through groove and corresponds to the magnetic core. An opening allowing part of the coil bobbin to be embedded therein is formed in the coil support. The opening is formed in the coil support and allows part of the coil bobbin to be embedded therein, so that the number of turns of the coil is increased under the precondition of maintaining the existing size, thus improving the power generation capacity and the stability of the electrical performance of the magnetic power generation device.