An electromagnetic contactor capable of coupling either one of an alternating current (AC) electromagnet or a direct current (DC) electromagnet with an identical contact support is provided. The electromagnetic contactor includes an electromagnet including either one of the AC electromagnet (12AC) including a movable core or the DC electromagnet (12DC) including an armature, and a contact support (36) configured to hold plural movable contacts in alignment to be coupled with and driven by the electromagnet. The contact support includes a coupling portion (40) including a movable core contact portion (41), coupling spring edge accommodation portions (46), and armature contact portions (51) arranged on opposite sides with respect to the movable core contact portion of the coupling spring edge accommodation portion. The AC electromagnet (12AC) includes an AC electromagnet coupling spring (56) and the DC electromagnet (12DC) includes a DC electromagnet coupling spring (161).

A key structure is provided. The key structure comprises a substrate, a membrane circuit disposed on the substrate, a conduction switch disposed on the membrane circuit, a keycap, a bending portion fixed to the keycap, an elastic member disposed on the membrane circuit and abutting against the keycap, and a connecting rod disposed movably between the membrane circuit and the keycap. The connecting rod includes an operating arm and an engaging portion. The operating arm is connected to the engaging portion, and the engaging portion selectively engages with the bending portion. When the operating arm moves in a direction parallel to a surface of the keycap, the operating arm drives the engaging portion to disengage from the bending portion and the elastic member provides a force against the keycap to move the keycap away from the conduction switch.

A magnetic keyboard includes a base, a switch circuit board and plural keys. Each key includes a keycap, plural first magnetic elements and plural second magnetic elements. The switch circuit board is disposed on the base. The plural keys are connected with the base. The plural first magnetic elements of each key are fixed on an inner surface of the keycap. The plural second magnetic elements are disposed within the base. The first magnetic elements are partially inserted into the corresponding second magnetic elements. Consequently, the keys are connected with the base, and the function of returning the keycaps to their original positions are achievable.

A keyboard includes a circuit board module and a key module. The key module includes a keycap, a connecting seat, a connecting assembly and an elastic member. The connecting seat is disposed on the circuit board module. The connecting seat has an opening. One end of the connecting assembly connects to the keycap, and the other end connects to the connecting seat. The elastic member is disposed in the opening of the connecting seat, and the connecting seat presses against the elastic member.

The present invention provides a keycap, which includes a lower plate and an upper cover. The lower plate has at least two engaging holes recessed inwardly from an upper surface of the lower plate and separated from each other. The upper cover is configured to be detachably assembled on the lower plate, in which the upper cover has at least two buckle members disposed on an inner top surface of the upper cover and respectively corresponding to the at least two engaging holes, and each of the buckle members has two buckle portions separated from each other, and each of the buckle portions has a protrusion protruding laterally outward, and each of the protrusions is configured to engage with a portion of the corresponding engaging hole.

The invention relates to a user input unit comprising a housing configured to be attached to a base of a user input device, such as a keyboard. The input unit also has a first movable element coupled to the housing, the first movable element being movable along a first direction and user operable second movable element coupled to the housing, the second movable element being movable along a second direction, the second direction being different from the first direction. Further a transmission configured to transfer movement of the second movable element along the second direction into movement of the first movable element along the first direction is provided. The invention also relates to a user input device, such as a keyboard, comprising a base, such a user input unit, and a sensor configured to sense a movement or a position of the first movable element along the first direction.

The present invention relates to a switch control panel including a base provided with a mounting cavity provided with an electronic element integrated board, characterized in that the base is sleeved with an upper cover and is in a sealed connection with the upper cover, the upper cover is provided orderly and is provided with a key boss capable of being deformed and reset, each of the key bosses penetrates through the mounting cavity and is provided with a key slot with an opening, one end of the key slot opposite the opening is connected to the mounting cavity and is provided with an interlayer capable of being deformed and reset, and a switch key is embedded between the interlayer and the opening in the key slot to improve the sealing performance and prevent the inside of the mounting cavity from entering water vapor.