A keyboard device includes plural key structures, a switch circuit board, an elastic cover and a seal element. The switch circuit board includes a hollow region. The elastic cover is disposed on the switch circuit board. The hollow region is covered by the elastic cover, so that a foreign liquid is prevented from entering the switch circuit board. The seal element is disposed on sidewalls of the switch circuit board. Consequently, a sealed region is formed between the switch circuit board and the elastic cover. When the inner gas within the switch circuit board is changed, the elastic cover is subjected to expansion or contraction. Consequently, the switch circuit board is not subjected to deformation in response to the volume change of the inner gas.

A keyboard device includes plural key structures, a switch circuit board, an elastic cover and a seal element. The switch circuit board includes a hollow region. The elastic cover is disposed on the switch circuit board. The hollow region is covered by the elastic cover, so that a foreign liquid is prevented from entering the switch circuit board. The seal element is disposed on sidewalls of the switch circuit board. Consequently, a sealed region is formed between the switch circuit board and the elastic cover. When the inner gas within the switch circuit board is changed, the elastic cover is subjected to expansion or contraction. Consequently, the switch circuit board is not subjected to deformation in response to the volume change of the inner gas.

An electronic device including a waterproof structure is provided. The electronic device includes a housing, a window arranged in at least a part of the housing, a display module arranged in a rear surface of the window, a heat radiating member arranged in a rear surface of the display module, a polymer member arranged between a first surface of the heat radiating member and the rear surface of the display module, and a conductive member arranged in a second surface of the heat radiating member facing the first surface of the heat radiating member. A waterproof structure for the heat radiating member may be configured using at least one of the polymer member or the conductive member.

A dome switch includes a first release membrane, a dome, a shim, and a second release membrane, the dome is mounted at an underside of the first release membrane, the second release membrane seals one end of a through opening of the shim, when the dome switch is mounted on a circuit board, a sealed space can be formed, ensuring that in the manufacture process of a smart card, the glue will not flow into the dome and hence the second release membrane will not be connected and adhered to the glue within the card, which may otherwise result in poor hand-tactile impression of the switch. The dome switch and the smart card with the dome switch presents good hand-tactile impression; the production rate is high and the rejection rate and the production cost are low.

A keyboard includes a plurality of keyswitches, a plastic baseplate, and a membrane circuit board. Each keyswitch has a keycap, a lifting mechanism and an elastic member. The lifting mechanism is movably connected to the keycap. The elastic member abuts against the keycap. The plastic baseplate has a first hole formed corresponding to each elastic member and has a connecting structure corresponding to each lifting mechanism. The connecting structure is movably connected to the lifting mechanism to make the keycap movable relative to the plastic baseplate. The membrane circuit board is disposed under the plastic baseplate. Each elastic member passes through the first hole on the plastic baseplate to be disposed on the membrane circuit board. When the keycap is pressed, the elastic member deforms downward to trigger the membrane circuit board. When the keycap is released, the elastic member returns the keycap to its original position.

A backlight module is applied to providing light to a plurality of keyswitches of a keyboard. Each keyswitch has a keycap and an elastic member abutting against the keycap. The backlight module includes a membrane circuit board and a light guide plate. The membrane circuit board has a light emitting diode corresponding to the keyswitch. The light emitting diode is located at a side of the elastic member and emits light to the keycap. The light guide plate is disposed on the membrane circuit board. The light guide plate has a slot hole for containing the light emitting diode and has a hole corresponding to the elastic member. An optical microstructure is formed on the light guide plate for guiding light of the light emitting diode to be incident to the keycap. The elastic member passes through the hole to be disposed on the membrane circuit board.

There is provided a contact switching device which has high productivity and in which operation characteristics hardly vary. The contact switching device includes an electromagnetic unit, a holder, a movable shaft, a movable yoke, a movable contact piece having movable contacts at both ends, fixed contacts, and a fixed yoke. At the time of excitation of the electromagnetic unit, the movable shaft moves to the holder side along a direction of an axis center. A magnetic circuit is formed of the fixed yoke and the movable yoke due to a magnetic field generated by a current that flows into the movable contact piece as a result of the movable contacts coming into contact with the fixed contacts. The movable yoke is then attracted to the fixed yoke.

The present invention discloses a computer thin film switch keyboard, wherein the keyboard comprises keys/keycaps, a light guide film, a fixing film/air hole layer, metal domes, an air slot layer, a conductive film/PCB and a key plate, the key plate is disposed at the lowest layer, the conductive film/PCB is disposed above the key plate, the air slot layer is disposed above the conductive film/PCB, the metal domes are disposed on the conductive film/PCB, more than one metal dome is disposed corresponding to key configurations on the keyboard, the fixing film/air hole layer is disposed above the metal domes, and the keys/keycaps are disposed above the fixing film/air hole layer. The present invention has characteristics of being light, thin, and easy to carry, and having a Bluetooth function, a short stroke, and lower noises, etc.

An electronic device including a waterproof structure is provided. The electronic device includes a housing, a window arranged in at least a part of the housing, a display module arranged in a rear surface of the window, a heat radiating member arranged in a rear surface of the display module, a polymer member arranged between a first surface of the heat radiating member and the rear surface of the display module, and a conductive member arranged in a second surface of the heat radiating member facing the first surface of the heat radiating member. A waterproof structure for the heat radiating member may be configured using at least one of the polymer member or the conductive member.

A light emitting keyswitch includes a board, a cap, a lifting mechanism disposed between the board and the cap, a membrane switch including first and second substrates, an LED, and a transparent hollow elastic body. The first substrate has a first outer surface and a first inner surface. The second substrate has a second outer surface and a second inner surface. A switch circuit is disposed between the first and second inner surfaces. A copper circuit is formed on the second inner surface. A hole is formed on the first substrate. The LED is disposed on the second substrate, passes through the hole and is coupled to the copper circuit. The transparent hollow elastic body is attached to the first outer surface for covering the LED and the hole and is located under the cap. When the cap is pressed, the lifting mechanism or the cap triggers the switch circuit.