Keyboard device
AssigneePrimax Electronics Ltd.
InventorBo-An Chen
Life of this patent
Estimating the term…
Abstract
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.
Claims9
A keyboard device, comprising:
- plural key structures exposed outside the keyboard device;
- a switch circuit board located under the plural key structures, wherein when the switch circuit board is triggered by one of the plural key structures, a corresponding key signal is generated, wherein the switch circuit board comprises a hollow region;
- an elastic cover disposed on the switch circuit board, wherein the hollow region is covered by the elastic cover, so that a foreign liquid is prevented from entering the switch circuit board;
- and
- a seal element disposed on sidewalls of the switch circuit board, so that a sealed region is formed between the switch circuit board and the elastic cover to prevent the foreign liquid from entering the switch circuit board, wherein when a volume of an inner gas within the sealed region increases, the elastic cover is subjected to expansion in response to elasticity of the elastic cover and the volume of the inner gas, wherein when the volume of the inner gas within the sealed region decreases, the elastic cover is subjected to contraction in response to elasticity of the elastic cover and the volume of the inner gas;
- wherein the switch circuit board comprises:
- an upper writing plate comprising a first opening and a first contact;
- a lower wiring plate located under the upper wiring plate, and comprising a second contact corresponding to the first contact;
- and
- a separation layer arranged between the upper wiring plate and the lower wiring plate, and comprising a second opening and a third opening, wherein the hollow region is defined by the first opening and the second opening collaboratively, and a key intersection is defined by the first contact, the second contact and the third opening collaboratively.
A keyboard device, comprising:
- plural key structures exposed outside the keyboard device;
- a switch circuit board located under the plural key structures, wherein when the switch circuit board is triggered by one of the plural key structures, a corresponding key signal is generated, wherein the switch circuit board comprises a hollow region;
- an elastic cover disposed on the switch circuit board, wherein the hollow region is covered by the elastic cover, so that a foreign liquid is prevented from entering the switch circuit board;
- and
- a seal element disposed on sidewalls of the switch circuit board, so that a sealed region is formed between the switch circuit board and the elastic cover to prevent the foreign liquid from entering the switch circuit board, wherein when a volume of an inner gas within the sealed region increases, the elastic cover is subjected to expansion in response to elasticity of the elastic cover and the volume of the inner gas, wherein when the volume of the inner gas within the sealed region decreases, the elastic cover is subjected to contraction in response to elasticity of the elastic cover and the volume of the inner gas;
- wherein the switch circuit board comprises:
- a lower wiring plate comprising a first opening and a second contact;
- an upper wiring plate located over the lower wiring plate, and comprising a first contact corresponding to the second contact;
- and
- a separation layer arranged between the upper wiring plate and the lower wiring plate, and comprising a second opening and a third opening, wherein the hollow region is defined by the first opening and the second opening collaboratively, and a key intersection is defined by the first contact, the second contact and the third opening collaboratively.
Dependencies are inferred from the claim text.