# US 2014/0151204 A1 · Keyswitch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151204 A1 - Document ID: US20140151204A1 - Status: Published application - Kind: A1 - Application number: 14/084,618 - Filed: 2013-11-20 - Published: 2014-06-05 - Earliest claimed: 2012-12-04 - Assignees: Darfon Electronics Corp.; Darfon Electronics (Suzhou) Co., Ltd. - Applicants: Darfon Electronics Corp.; Darfon Electronics (Suzhou) Co., Ltd. - Inventors: Ji-Huang Chen - Web page: https://patentgrep.com/patent/US20140151204A1 ## CPC - H01H 13/02: Details - H01H 13/14: Operating parts, e.g. push-button - H01H 13/85: characterised by tactile feedback features - H01H 13/83: characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements - H01H 2219/044: Edge lighting of layer - H01H 2221/04: magnetic - H01H 2237/00: Mechanism between key and laykey - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) ## Abstract A keyswitch includes a base, a first magnetic area, a key cap, a second magnetic area, a first linking bar and a second linking bar. The first magnetic area is disposed on the base. The second magnetic area is disposed on the key cap. A position of the second magnetic area is corresponding to a position of the first magnetic area. The first and second linking bars are disposed between the base and the key cap. The first and second linking bars are movably connected to the base and the key cap, so as to drive the key cap to move with respect to the base between a non-pressed position and a pressed position. ## Claims ### Claim 1 A keyswitch comprising: a base; a first magnetic area disposed on the base; a key cap; a second magnetic area disposed on the key cap, a position of the second magnetic area being corresponding to a position of the first magnetic area; and a first linking bar and a second linking bar disposed between the base and the key cap, the first and second linking bars being movably connected to the base and the key cap, so as to drive the key cap to move with respect to the base between a non-pressed position and a pressed position; wherein when the keycap is not pressed, a magnetic attraction force between the first magnetic area and the second magnetic area keeps the key cap at the non-pressed position; when the key cap is pressed by an external force such that the second magnetic area moves away from the first magnetic area, the key cap moves with the first and second linking bars from the non-pressed position toward the pressed position; when the external force is removed, the second magnetic area moves toward the first magnetic area due to the magnetic attraction force such that the key cap moves with the first and second linking bars from the pressed position toward the non-pressed position. ### Claim 2 (depends on 1) The keyswitch of claim 1, wherein the first and second linking bars are parallel to each other and capable of rotating in an identical direction, so as to drive the key cap to move with respect to the base between the non-pressed position and the pressed position. ### Claim 3 (depends on 1) The keyswitch of claim 1, wherein the first and second linking bars are perpendicular to each other, so as to drive the key cap to move with respect to the base between the non-pressed position and the pressed position. ### Claim 4 (depends on 3) The keyswitch of claim 3, wherein the first linking bar is rotatably connected to the base and the second linking bar is slidably connected to the base. ### Claim 5 (depends on 1) The keyswitch of claim 1, wherein one of the first magnetic area and the second magnetic area is a magnetic object and the other one of the first magnetic area and the second magnetic area is a magnetic object or a magnetic induction material. ### Claim 6 (depends on 1) The keyswitch of claim 1, wherein a side plate is bent from the base so as to form the first magnetic area. ### Claim 7 (depends on 1) The keyswitch of claim 1, wherein the second magnetic area is disposed on four corners or a center of a bottom of the key cap. ### Claim 8 (depends on 1) The keyswitch of claim 1, further comprising a casing disposed on a bottom of the key cap and used for accommodating the second magnetic area. ### Claim 9 (depends on 1) The keyswitch of claim 1, wherein a moving trajectory of the key cap is arc-shaped while the key cap moves with respect to the base between the non-pressed position and the pressed position. ### Claim 10 (depends on 1) The keyswitch of claim 1, wherein the base has a hole formed thereon, the keyswitch further comprises a backlight device disposed below the base, and the backlight device provides light for the key cap. ### Claim 11 (depends on 1) The keyswitch of claim 1, wherein the base is transparent, the keyswitch further comprises a backlight device disposed below the base, and the backlight device provides light for the key cap. ### Claim 12 (depends on 1) The keyswitch of claim 1, wherein the base is plastic, the keyswitch further comprises a capacitance sensing device disposed below the base, and the capacitance sensing device is used for providing a cursor signal or a key-on signal. ### Claim 13 A keyswitch comprising: a base; a first magnetic area disposed on the base; a key cap having a main body, a first extending arm and a second extending arm, the first and second extending arms being rotatably connected to the base and capable of rotating in an identical direction, so as to drive the key cap to move with respect to the base between a non-pressed position and a pressed position; and a second magnetic area disposed on the key cap, a position of the second magnetic area being corresponding to a position of the first magnetic area; and wherein when the keycap is not pressed, a magnetic attraction force between the first magnetic area and the second magnetic area keeps the key cap at the non-pressed position; when the key cap is pressed by an external force such that the second magnetic area moves away from the first magnetic area, the key cap moves with the first and second extending arms from the non-pressed position toward the pressed position; when the external force is removed, the second magnetic area moves toward the first magnetic area due to the magnetic attraction force such that the key cap moves with the first and second extending arms from the pressed position toward the non-pressed position. ### Claim 14 (depends on 13) The keyswitch of claim 13, wherein one of the first magnetic area and the second magnetic area is a magnetic object and the other one of the first magnetic area and the second magnetic area is a magnetic object or a magnetic induction material. ### Claim 15 (depends on 13) The keyswitch of claim 13, wherein a side plate is bent from the base so as to form the first magnetic area. ### Claim 16 (depends on 13) The keyswitch of claim 13, wherein the second magnetic area is disposed on four corners or a center of a bottom of the key cap. ### Claim 17 (depends on 13) The keyswitch of claim 13, further comprising a casing disposed on a bottom of the key cap and used for accommodating the second magnetic area. ### Claim 18 (depends on 13) The keyswitch of claim 13, wherein a moving trajectory of the key cap is arc-shaped while the key cap moves with respect to the base between the non-pressed position and the pressed position. ### Claim 19 (depends on 13) The keyswitch of claim 13, wherein the base has a hole formed thereon, the keyswitch further comprises a backlight device disposed below the base, and the backlight device provides light for the key cap. ### Claim 20 (depends on 13) The keyswitch of claim 13, wherein the base is transparent, the keyswitch further comprises a backlight device disposed below the base, and the backlight device provides light for the key cap. ### Claim 21 (depends on 13) The keyswitch of claim 13, wherein the base is plastic, the keyswitch further comprises a capacitance sensing device disposed below the base, and the capacitance sensing device is used for providing a cursor signal or a key-on signal. ### Claim 22 (depends on 13) The keyswitch of claim 13, wherein the main body, the first extending arm and the second extending arm are formed integrally.