A keyswitch structure includes a base plate, a keycap, a scissors support connecting the keycap and the base plate, a linking support rotatably disposed on the base plate, a movable part movably disposed relative to the base plate, and a magnetic part on the movable part. The linking support includes a magnetic portion and a driving portion. The magnetic part and the magnetic portion produce a magnetic attraction force therebetween. When the movable part is located at a first position, the magnetic part is located under the magnetic portion, and the magnetic attraction force drives the keycap through the linking support to move away relative to the base plate. When the movable part moves from the first position to a second position, the magnetic part moves away relative to the magnetic portion, so that the magnetic attraction force decreases so as to make the keycap move toward the base plate.

A keyswitch structure includes a base plate, a keycap, a lift mechanism connecting the keycap and the base plate, a movable part movably disposed relative to the base plate, a linking support, and a magnetic part on the base plate. The linking support has a pivotal connection portion, a magnetic portion, and a driving portion. The magnetic part and the magnetic portion produce a magnetic attraction force therebetween. When the movable part is located at a first position, the pivotal connection portion is rotatably disposed on a protruding portion of the movable part, and the magnetic attraction force drives the keycap through the linking support to move away relative to the keycap. When the movable part moves from the first position to a second position, the protruding portion moves away, so that the pivotal connection portion falls down and the keycap moves toward the base plate.

An electropermanent magnet key assembly of an information handling system comprising an electropermanent magnet (EPM) having a low-coercivity magnet and a high-coercivity magnet, wherein the EPM is capable of an on state generating a magnetic field and an off state disabling the magnetic field, a key cap, situated atop a pair of scissor plates, capable of downward movement, via action of the scissor plates, from a raised, neutral position in which a surface of the key cap is moved to a depressed position below the neutral position, wherein the downward movement of the key assembly may record a keystroke, a flange operably connected a first scissor plate of the pair of scissor plates and extending opposite of a hinge of the first scissor plate, such that the flange is attracted toward the magnetic field of the EPM situated beneath the pair of scissor plates to urge the first scissor plate to push the key cap to the neutral position in an on state, and a spring exerting a biasing force to rotate a rocker arm toward the flange for urging the flange away from the EPM opposite to the attraction of the magnetic field of the EPM, wherein the effect of the biasing force on movement of the flange is lesser than the effect of the magnetic field generated by the EPM on movement of the flange in the on state.

A key switch includes a key cap, a base, a support device and a bracket. The base has a first magnetic area. The support device is disposed between the key cap and the base. The bracket is movably connected to the support device. The bracket has a second magnetic area corresponding to the first magnetic area. When the key cap is not pressed, a magnetic attraction force between the first and second magnetic areas keeps the key cap at a non-pressed position. When the key cap is pressed by an external force, the key cap moves with the support device from the non-pressed position to a pressed position. When the external force is released, the second magnetic area moves toward the first magnetic area due to the magnetic attraction force, such that the key cap moves with the support device from the pressed position to the non-pressed position.

A keyswitch structure includes a keycap, a baseplate having a buffer space, a support movably disposed between the baseplate and the keycap, a magnetic member having a front section coupling the support, a middle section and a tail end, a magnetic unit disposed below the magnetic member, a switch film having a flexible portion extending over the buffer space. When the keycap is pressed, the support enables the magnetic member to move away from the magnetic unit, so the tail end is away from the flexible portion. When the keycap is released, a magnetic attraction force between the magnetic member and the magnetic unit enables the magnetic member to move toward the magnetic unit, so the tail end firstly contacts and pushes the flexible portion to deform toward the buffer space, and then the middle section contacts the magnetic unit to drive the support to support the keycap upward.

An electro-permanent magnet (EPM) key assembly of an information handling system may comprise a pair of scissor plates operably connected to a base contact assembly including an EPM such that each of the pair of scissor plates may rotate away from one another in the presence of downward force on a key cap situated atop the pair of scissor plates for actuation of the EPM key assembly; the EPM comprising a low-coercivity magnet and a high-coercivity magnet; wherein an application of a first current pulse applied to an electrically conductive wire coiled around the low-coercivity magnet places the EPM in a first on state to assert a first magnetic field on a ferromagnetic flange operatively coupled to rotate with at least one scissor plate about a hinge; and wherein an application of a second current pulse applied to the electrically conductive wire places the EPM in a second on state to increase the magnetic field on the ferromagnetic flange.

An electro-permanent magnet key assembly may comprise an electro-permanent magnet generating a magnetic field when a direction of current applied to an electrically conductive wire coiled around a low-coercivity magnet, and a pair of scissor plates operably connected to the electropermanent magnet, such that the scissor plates rotate away from one another in the presence of downward force on a key cap situated atop the scissor plates. The top surface of the key cap may lie flush with adjacent keys of a keyboard when the key cap is in a neutral position. The electro-permanent magnet key assembly may further comprise a ferromagnetic flange operably connected to one of the scissor plates having angled overlap protrusions situated adjacent to the electropermanent magnet when the key cap is not in the neutral position, such that the angled overlap protrusions are attracted toward the magnetic field to return the key cap to the neutral position.

An electropermanent magnet key assembly of an information handling system comprising an electropermanent magnet (EPM) having a low-coercivity magnet and a high-coercivity magnet, wherein the EPM is capable of an on state generating a magnetic field and an off state disabling the magnetic field, a key cap, situated atop a pair of scissor plates, capable of downward movement, via action of the scissor plates, from a raised, neutral position in which a surface of the key cap is moved to a depressed position below the neutral position, wherein the downward movement of the key assembly may record a keystroke, a flange operably connected a first scissor plate of the pair of scissor plates and extending opposite of a hinge of the first scissor plate, such that the flange is attracted toward the magnetic field of the EPM situated beneath the pair of scissor plates to urge the first scissor plate to push the key cap to the neutral position in an on state, and a spring exerting a biasing force to rotate a rocker arm toward the flange for urging the flange away from the EPM opposite to the attraction of the magnetic field of the EPM, wherein the effect of the biasing force on movement of the flange is lesser than the effect of the magnetic field generated by the EPM on movement of the flange in the on state.

A method for assembling an electro-permanent magnet (EPM) key assembly of an information handling system may comprise disposing a pair of scissor plate mounts framed onto a base contact assembly upward through a cap support plate opening within a cap support plate comprising a printed circuit board with pressure sensors to record keystrokes for mounting the EPM key assembly, operably connecting the base contact assembly to the cap support plate, disposing a ferromagnetic flange operably coupled to rotate with at least one scissor plate about a hinge downward through the cap support plate opening, operably connecting the pair of scissor plates to the base contact assembly such that each of the pair of scissor plates may rotate away from one another in the presence of downward force on a key cap, and situating the key cap atop the pair of scissor plates.

A touchpad module for an electronic device is provided. The touchpad module includes a fixing frame, a touch member, a switch member and an adjusting element. The touch member is installed within an opening of the fixing frame. The switch member is installed on the touch member. The switch member includes a first magnetic element. The adjusting element is accommodated within an adjusting hole of the fixing frame. The adjusting element includes a second magnetic element corresponding to the first magnetic element. Moreover, like poles of the first magnetic element and the second magnetic element face each other. Consequently, a travelling distance of the touch member is adjusted according to a repulsive force between the first magnetic element and the second magnetic element.