Electromechanical lock and method are disclosed. The lock includes: a movable permanent magnet to move between a first position and a second position; a stationary permanent semi-hard magnet; and an electrically powered magnetization coil positioned adjacent to the stationary permanent semi-hard magnet to switch a polarity of the stationary permanent semi-hard magnet between a first magnetization configuration and a second magnetization configuration. The first magnetization configuration of the stationary permanent semi-hard magnet moves the movable permanent magnet to the first position. The second magnetization configuration of the stationary permanent semi-hard magnet moves the movable permanent magnet to the second position. A magnetic axis of the movable permanent magnet is side by side with a magnetic axis of the stationary permanent semi-hard magnet.

A personal care product system is provided. The personal care product system has a stand that has a first stand permanent docking magnet. A stand inductive charging coil is also positioned within the stand. A handle that has a first handle permanent docking magnet is removably mounted to the stand. A handle inductive charging coil is positioned within the handle. A handle flux guiding member is in close proximity to a surface of the first handle permanent docking magnet to direct a magnetic field away from the inductive charging coils.

A rotation operation device using magnetic force, which is compact and enables a user to perform a proper operation. The rotation operation device includes a rotation operation member rotatable about a predetermined axis. A ring-shaped magnet is magnetized in a magnetization direction parallel to the predetermined axis such that magnetic poles alternate. The magnet rotates about the predetermined axis along with rotation of the rotation operation member. A first magnetic body have first tooth portions formed at predetermined intervals along a circumferential direction and extending in radial directions of the magnet. The magnet overlaps with the first tooth portions in a direction of the predetermined axis. An operating physical force is generated according to changes in positions of the magnetic poles and the first tooth portions, which are caused by rotation of the magnet.

A magnetic assembly structure has a main body and an inserting component. A first engagement slot of the main body receives a first magnetic component, and a first receiving slot of the main body penetrates a main body surface to form a main body opening on the main body surface. The first engagement slot and the first receiving slot are communicated with each other. The inserting component is inserted into the first receiving slot via the main body opening, and the first magnetic component moves into the first magnetic component receiving slot of the inserting component. The magnetic assembly is assembled with a less force, has higher safety, and is hard to be disassembled without allowance or explanations.

The present disclosure relates to the field of decor items, and more particularly relates to a pendulum unit and a wave pendulum assembly based on the pendulum unit, wherein the wave pendulum assembly comprises a frame and a plurality of first magnetic bodies, respective first magnetic bodies being connected to the frame via strings and being hung in the air; second magnetic bodies, the amount of which is identical to that of the first magnetic bodies, the second magnetic bodies being fixedly disposed below the first magnetic bodies in a one-to-one correspondence; in the first magnetic bodies and the second magnetic bodies, at least one party may generate magnetism when being energized, such that at least one of the first magnetic body and the second magnetic body may generate magnetism when being energized, such that the first magnetic body may swing periodically in the air under a magnetic action between the first magnetic body and the second magnetic body.. The wave pendulum assembly provided by the present disclosure has beneficial effects such as a simple structure, a good reliability, and an appeal for viewing.

A permanent magnet drive on-load tap-changing switch including a changing switch circuit and a high-speed mechanism. The circuit includes structurally identical odd and even-numbered tap-changing switch circuits. The mechanism includes a traveling mechanism used for bearing a moving contactor, a moving magnet group connected with the traveling mechanism, and a fixed magnet group producing an attracting/repelling force with respect to the moving magnet group. The moving magnet group includes a first and second permanent magnet connected at homonymic magnetic poles. An exposed homonymic magnetic pole of the first and the second permanent magnet face directly the fixed magnet group. The fixed magnet group includes a rotating permanent magnet that rotates to change a force applied to the moving magnet group, allowing the moving contactors to either come into contact with or be separated from working contactors and dual-contact synchronous transition contactors.

An external adjustment device for non-invasively adjusting an adjustable implant, the external adjustment device including a controller in communication with an actuator associated with the implant and a sensor configured to receive information from or about the implant. The external adjustment device may include a power source and a display. The external adjustment device may include a magnetic element configured to generate a rotating magnetic field; and a driver configured to drive the magnetic element to generate the rotating magnetic field and configured to rotate a permanent magnet of an implant. Upon placing the external adjustment device in proximity to the implant, the magnetic element is configured to magnetically couple with the permanent magnet. The external adjustment device may be configured to non-invasively determine one or more of a magnetic coupling state and a stalled state of the magnetic element and the permanent magnet disposed within the implant.

A mechanism for fixing together first and second parts and comprising first and second guides provided respectively in or attached to the first and second parts. The mechanism further comprises first and second magnetic components coupled respectively to the first and second guides such that the first magnetic component is rotatable with the first guide and the first part, and the second magnetic component cannot rotate relative to the second guide, the magnetic components being moveable axially and rotationally with respect to each other and having magnetic poles oriented such that rotation of said first magnetic component causes relative axial movement of the magnetic components between a locking position in which one of the magnetic components straddles the two guides and an unlocking position in which it does not straddle the two guides.

A passive magnetic constant-force apparatus comprises a geometry and arrangement of permanent magnets, ferromagnetic components, and non-magnetic structural components. The apparatus is easily and precisely adjustable, cost-effective, with a high load capacity, and with minimal parasitic forces. The apparatus is suitable for use as a counterbalance for vertical linear motion applications and may be integrated with or attached to a linear motion stage.

A system and method for perturbing a permanent magnet asymmetric field to move a body includes a rotating body configured to rotate about a rotation axis, a permanent magnet arrangement arranged on the rotating body containing two or more permanent magnets, and a perturbation element. The permanent magnet arrangement is configured such that an asymmetric magnetic field is generated by the permanent magnets about a perturbation point. Actuation of the perturbation element at or near the perturbation point causes a tangential magnetic force on the rotating body and/or the permanent magnet arrangement, thereby causing the rotating body to rotate about the rotation axis. The disclosure may also be used for linear motion of a body.