The invention relates to an electromagnetic actuator having a magnetic circuit comprising at least two, preferably three, magnetic circuit elements, wherein the magnetic circuit elements exert an attracting or repelling force on one another such that the actuator effects a movement, wherein the position of at least one of the magnetic circuit elements relative to another magnetic circuit element can be adjusted in order to influence the actuator rigidity.

An electromagnetic energy converter including two plates each having an inner face; a flux variation device arranged between the inner faces, and which includes a first prismatic part, a magnet and a second prismatic part, and is arranged to pivot about an axis between two equilibrium positions, and for which the first and second prismatic parts each come into contact with an inner face; and a coil designed to be crossed by a magnetic flux generated by the magnet and guided by the two plates in a first direction when the device is in one equilibrium position, and in a second direction when said device is in the other equilibrium position.

A support structure for supporting a flexible display screen includes: a plurality of electromagnets and a controller electrically coupled to the plurality of electromagnets. Each electromagnet has a first surface and a second surface. The first surface is configured to be attached and secured to a flexible display screen so as to support the flexible display screen, and the second surface is at an acute angle to the first surface. When the flexible display screen is extended, the controller controls two adjacent electromagnets to repel each other. When the flexible display screen is bent, the controller controls two adjacent electromagnets to attract each other.

The present disclosure relates to the technical field of unmanned aerial vehicle (UAV) tests, and more particularly, to an electromagnetic release device for use in vertical falling tests of tri-rotor UAVs and including a mounting frame and multiple clamping and release modules arranged on the mounting frame. movable kits, which include a ferromagnetic plate matching and connected with the electromagnetic adsorption assembly, one end of the ferromagnetic plate is hinged with the electromagnet mounting frame, and the other end of the ferromagnetic plate is connected with the UAV connecting plate; The present disclosure uses electromagnetic control to accurately control the simultaneous opening of three clamping and release modules of a UAV, realizes the release and landing of the UAV in a horizontal status, and is characterized by simple structure and easy operation.

A camera module includes: a housing; a rotation holder configured to tilt about an axis perpendicular to an optical axis with respect to the housing, and accommodating a reflective member; a first magnetic member disposed in the rotation holder; a middle guide disposed between the housing and the rotation holder; and a first ball group including three ball members disposed between the rotation holder and the middle guide. An inner region of a triangle connecting the three ball members of the first ball group to one another and the first magnetic member overlap each other in a direction of the optical axis.

A portable electronic device and a movable lens-shutting module thereof are provided. The movable lens-shutting module includes a magnetic field generator, a rotatable driving assembly and a movable shutter assembly. The rotatable driving assembly includes a rotatable magnetic element and a rotatable driving element fixed on the rotatable magnetic element. The rotatable driving element includes at least one driving rod. The movable shutter assembly includes at least one shutter element. The shutter element includes a lens opening corresponding to a lens and a receiving groove for receiving the driving rod. When the rotatable magnetic element and the rotatable driving element are concurrently moved by a magnetic force generated by the magnetic field generator, the shutter element is moved in a linear direction by moving the driving rod, so that the lens is exposed by the lens opening or is blocked by the shutter element.

Disclosed is a magnetic force control device improved to be installed even in a narrow space having a small height. The magnetic force control device includes a first pole piece having a first interaction surface, a second pole piece having a second interaction surface, a third pole piece connected to the second pole piece, a coil wound around at least one of the second pole piece and the third pole piece, a stationary magnet fixed between the first pole piece and the second pole piece and a rotary magnet disposed between the first pole piece and the third pole piece and configured to be rotatable by controlling a current flowing through the coil.

Disclosed is a magnetic force control device improved to be installed even in a narrow space having a small height. The magnetic force control device includes a first pole piece having a first interaction surface, a second pole piece having a second interaction surface, a third pole piece connected to the second pole piece, a coil wound around at least one of the second pole piece and the third pole piece, a stationary magnet fixed between the first pole piece and the second pole piece and a rotary magnet disposed between the first pole piece and the third pole piece and configured to be rotatable by controlling a current flowing through the coil.

An optical element driving mechanism is provided, including a movable part, a fixed part, a driving assembly, a circuit assembly, and a connecting element. The movable part is for connecting an optical element. The fixed part includes an outer frame and a base, wherein the movable part is movable relative to the fixed part. The driving assembly is for generating a driving force to drive the movable part to move relative to the fixed part. The circuit assembly is for connecting to an external circuit. The circuit assembly includes a first terminal. The outer frame is fixedly connected to the base via the connecting element.

The present disclosure provides an optical element driving mechanism, which includes a movable part, a fixed assembly, a first driving assembly and a guiding assembly. The movable part is configured to be connected to an optical element. The fixed assembly has an accommodating space, and the movable part is partially disposed in the accommodating space and is movable relative to the fixed assembly. The first driving assembly is configured to drive the movable part to move relative to the fixed assembly. The guiding assembly is configured to guide the movable part to move along a first axis relative to the fixed assembly. There is no elastic element disposed between the movable part and the fixed assembly.