An electromagnetic actuator including a coil; a non-movable part constituted by a magnetic substance and disposed on one side relative to the coil; and a movable part including a permanent magnet on the other side relative to the coil. Applying a current to the coil alternately generates first and third driving forces to move the magnet and the movable part to one and the other sides in a first direction relative to the coil and the non-movable part. As the movable part moves from a neutral position to the one side in the first direction, a portion of the magnet positioned on the one side in the first direction relative to the first end of the first non-movable part gradually enlarges and is magnetically attracted toward the non-movable part. As the movable part moves from the neutral position to the other side in the first direction, a portion of the magnet positioned on the other side in the first direction relative to the second end of the first non-movable part gradually enlarges and is magnetically attracted toward the non-movable part.

An actuator device has at least one actuator element which at least in part is composed of a magnetically shape-shiftable material, and has a magnet unit which comprises at least one first magnetic element that is implemented as a coil unit and at least one second magnetic element that is implemented as a permanent magnet, at least the first magnetic element and the second magnetic element are configured for interacting in at least one operating state so as to cause a local deformation of the actuator element in a partial region of the actuator element.

The application relates to an electromagnetic control device, in particular for adjusting camshafts or a camshaft section of an internal combustion engine, comprising: an energizable coil unit, via which, in an energized state, an armature mounted for movement along a longitudinal axis of the control device can be moved relative to a pole core between a retracted position and an extended position; at least one tappet, which is mounted for movement along the longitudinal axis and, in an extended position, interacts with the camshaft via a free end in order to adjust the camshaft and is connected at an inner end to the armature, wherein the tappet has a first diameter in the region of the free end and has a second diameter in the region of the inner end, and the first diameter is greater than the second diameter.

Magnets are configured to generate absorption force for holding a movable member at each of first and second positions. A power generator includes a mover configured to move in conjunction with the movable member. The power generator is configured to convert kinetic energy of the mover into electrical energy. When an operator moves in a direction in which a first pressing part approaches a second holding part while the movable member is at the first position, a spring member is compressed by the first pressing part and the second holding part. The spring member then generates restoring force for moving the movable member to the second position. When the operator moves in a direction in which a second pressing part approaches a first holding part while the movable member is at the second position, the spring member is compressed by the second pressing part and the first holding part. The spring member then generates restoring force for moving the movable member to the first position.

In the actuator, the first end plate part of the first cover member in the support body is layered on one side in the first direction of the holder and faces the first yoke of the movable body from one side in the first direction. The second end plate part of the second cover member in the support body is layered on the other side in the first direction of the holder and faces the movable body from the other side in the first direction. Thus, the first viscoelastic member interposed between the movable body and the first end plate part in the first direction properly contacts with the movable body and the first end plate part. The second viscoelastic member interposed between the movable body and the second end plate part in the first direction properly contacts with the movable body and the second end plate part.

A haptic actuator may include a housing that includes first and second shells. The first shell may define a first tab and the second shell may define a second tab. The housing may also include a plastic end portion positioned between the first and second shells. The plastic end portion may define recesses that receive the first and second tabs. At least one coil may be carried by the housing. A field member may be movable within the housing responsive to the at least one coil. A flexure may be coupled to the plastic end portion and the field member.

The present invention provides a permanent magnet-electromagnet synergistic coupling-based high-speed solenoid valve with a high dynamic response and a low rebound, including a shell and an iron core. The iron core is installed in the shell, an axial center through hole is formed in a middle of the iron core, a spring limiting sleeve is installed in the axial center through hole, an armature and a reset spring cavity are sequentially formed below the iron core, an upper portion of a valve rod is located in the spring limiting sleeve, an upper disc permanent magnet, a lower disc permanent magnet and a spring washer are arranged in the spring limiting sleeve, and a giant magnetostrictor is installed between the upper disc permanent magnet and the lower disc permanent magnet. By means of the present invention, electromagnetic force generated during pickup of the armature can be effectively improved.

On-platform pumps provide greater flexibility and design freedom and are a key feature of organs-on-chip platforms. On-platform electromagnetic (EM) pumps have been developed for use with the organ-on-chip platforms. The EM pump uses electrical energy, which may be supplied by a battery, making the pump portable. The EM pump uses an EM actuator having a low energy consumption. The actuator's low energy consumption is achieved by a latching design which requires only a short pulse of energy to switch its state and where springs store some of the actuator kinetic energy, which is then recovered in the reverse stroke. This further reduces the energy consumption of the actuator. Also provided are injection-molded, single-use platforms with onboard diaphragm micro-pumps and various valve and pump geometries. The EM actuators easily integrate with these platforms, demonstrating pumping at a constant flowrate, no measurable temperature rise, and valve sealing against varying back-pressure.

In an electromagnetic actuator having a housing, two ferromagnetic pole shoes are distanced from each other and are rigidly connected to the housing. A mobile structure, which can be moved in the housing along an axis between two end positions, is arranged between the pole shoes, includes at least one magnet system, and is connected to a shaft that is axially displaceable in the housing. The magnet system includes at least one arrangement of at least one permanent magnet polarized radially with respect to the axis, and an annular coil connectable to a current source. The magnet system forms, together with the pole shoes, an air gap system having axially variable air gaps. The mobile structure is securable in each end position without excitation of the coil and is movable from one assumed end position into the opposite end position by excitation of the coil.

The invention relates to an optical zoom device (1) Optical zoom device (1), comprising a first lens assembly (2), and a second lens assembly (3) following the first lens assembly (2) in the direction of an optical axis (A) of the optical zoom device (1) so that light (L) can pass through the first lens assembly (2) and thereafter through the second lens assembly when travelling along the optical axis (A), wherein said lens assemblies each comprise a focus-adjustable lens (31, 32) as well as an electropermanent magnet (107, 207) or a shape memory alloy (120, 220) for actuating the respective lens (31, 32).