公开(公告)号：US11177092B1

公开(公告)日：2021-11-16

申请号：US17162403

申请日：2021-01-29

Applicant: Primax Electronics Ltd.

Inventor： Chien-Hung Liu ,  Chin-Sung Pan ,  Lei-Lung Tsai ,  Chia-Wei Chang

IPC: H01H13/12 ,  H01H13/7065 ,  H03K17/969 ,  H01H3/12

Abstract: A keyboard device includes plural key structures. Each key structure includes a plate assembly, a keycap assembly, an elastic element, a connecting member and a signal generator. The plate assembly includes a membrane switch. The keycap assembly is located over the plate assembly. The elastic element is arranged between the plate assembly and the keycap assembly. The connecting member is arranged between the plate assembly and the keycap assembly. The connecting member includes a triggering part. The signal generator is installed on the plate assembly. While the keycap assembly is moved toward the plate assembly through the connecting member, the triggering part is moved downwardly to trigger the signal generator to generate a first signal. After the signal generator is triggered, the keycap assembly is continuously moved downwardly and the membrane switch is triggered to generate a second signal.

公开(公告)号：US11120956B1

公开(公告)日：2021-09-14

申请号：US17031735

申请日：2020-09-24

Applicant: Primax Electronics Ltd.

Inventor： Chia-Wei Chang ,  Chin-Sung Pan ,  Lei-Lung Tsai

IPC: H01H3/12 ,  H01H13/7057 ,  H01H13/704 ,  H01H13/7073

Abstract: A keyboard device includes a key structure and a membrane circuit board. The membrane circuit board includes a membrane switch. The membrane switch is located under the key structure. The key structure includes a pedestal structure, a covering structure, a keycap, a connecting element, a dome-type elastomer and a knocking element. The keycap is installed on the covering structure. The connecting element is connected between the covering structure and the pedestal structure. The dome-type elastomer is arranged between the covering structure and the membrane circuit board. When the keycap is not depressed, the knocking element is supported on the connecting element. While the keycap is depressed, the knocking element knocks on the connecting element to generate an operating sound and provide the operating feedback to the user.

公开(公告)号：US20190221383A1

公开(公告)日：2019-07-18

申请号：US15962137

申请日：2018-04-25

Applicant: Primax Electronics Ltd.

Inventor： Bo-An Chen ,  Chih-Feng Chien ,  Yi-Guang Chen ,  Chin-Sung Pan

IPC: H01H13/704 ,  H01H13/705 ,  G06F3/02

CPC classification number: G06F3/0233 ,  G06F3/0202 ,  H01H13/704 ,  H01H13/705

Abstract: A keyboard device includes plural keys, a control unit and a membrane switch circuit member. The membrane switch circuit member includes a first upper key switch and a first lower key switch. When the first upper key switch is triggered by the first key, a first key code corresponding to the first key is generated by the first upper key switch. When the first lower key switch is triggered by the first key, a second key code corresponding to the first key is generated by the first lower key switch. The control unit is connected with the membrane switch circuit member. If both of the first key code and the second key code are received by the control unit, a key signal is outputted. If either the first key code or the second key code is received by the control unit, the key signal is not outputted.

公开(公告)号：US20190148091A1

公开(公告)日：2019-05-16

申请号：US15907885

申请日：2018-02-28

Applicant: Primax Electronics Ltd.

Inventor： Chin-Sung Pan ,  Bo-An Chen ,  Ying-Te Chiang ,  Chien-Hung Liu ,  Chen-Hsuan Hsu

IPC: H01H13/83 ,  F21V8/00 ,  H01H13/7065

Abstract: A luminous keyboard includes at least one key, a switch circuit board, a supporting plate, a backlight module, a reflecting plate and a light-sheltering plate. The backlight module emits a light beam. The backlight module is arranged between the reflecting plate and the light-sheltering plate. A periphery region of the reflecting plate and a periphery region of the light-sheltering plate are thermally laminated or laser welded to define a sealed structure. Since the periphery region of the backlight module is sealed by the sealed structure, the light beam is not leaked out through the periphery region of the backlight module. The space occupied by the sealed structure is not very large. Consequently, the volume of the luminous keyboard is reduced.

公开(公告)号：US20190131087A1

公开(公告)日：2019-05-02

申请号：US15878973

申请日：2018-01-24

Applicant: Primax Electronics Ltd.

Inventor： Bo-An Chen ,  Chin-Sung Pan

IPC: H01H13/705 ,  G06F3/02

Abstract: A keyboard device includes a base plate, a key structure and a membrane switch circuit member. The membrane switch circuit member includes a first board and a second board. The first board includes a first circuit pattern, a conductive paste mark and a first insulation layer. The conductive paste mark is dispensed or sprayed on the first board or the first circuit pattern to define an equivalent resistance. Consequently, a ghosting problem is avoided. The second board includes a second circuit pattern and a second insulation layer. Since the first contact and the second contact are separated from each other through the first insulation layer and the second insulation layer, it is not necessary to install the separation layer in the membrane switch circuit member.

公开(公告)号：US10242820B1

公开(公告)日：2019-03-26

申请号：US15865765

申请日：2018-01-09

Applicant: Primax Electronics Ltd.

Inventor： Ying-Te Chiang ,  Bo-An Chen ,  Chin-Sung Pan ,  Chen-Hsuan Hsu

IPC: H01H3/12 ,  H01H13/83 ,  H01H13/705

Abstract: A luminous keyboard includes plural keys, a membrane switch circuit member, a supporting plate and a backlight module. The membrane switch circuit member is located under the plural keys, and includes an upper wiring plate, a lower wiring plate and a separation plate. The supporting plate is located under the membrane switch circuit member and connected with the plural keys. The backlight module is located under the supporting plate to generate a light beam. A periphery region of at least one of the upper wiring plate, the lower wiring plate and the separation plate is bent to cover the supporting plate and the backlight module. Consequently, the light beam is not leaked out through the periphery region of the backlight module.

公开(公告)号：US10020140B2

公开(公告)日：2018-07-10

申请号：US15434147

申请日：2017-02-16

Applicant: PRIMAX ELECTRONICS LTD.

Inventor： Chin-Sung Pan ,  Ming-Han Wu

IPC: H01H13/14 ,  H01H13/7065 ,  H01H13/705 ,  H01H3/12 ,  H01H13/83

CPC classification number: H01H13/7065 ,  H01H3/125 ,  H01H13/14 ,  H01H13/705 ,  H01H13/83 ,  H01H2217/004 ,  H01H2221/062

Abstract: A keyboard device includes a base plate, plural keys and a membrane circuit board. The keys are connected with the base plate. The membrane circuit board is arranged between the keys and the base plate. The base plate includes at least one elastic vibration absorber corresponding to a keycap or a stabilizer bar of the corresponding key. While the keycap is moved downwardly relative to the base plate, the sound resulted from the collision between the keycap or the stabilizer bar and the membrane circuit board or the base plate is reduced. Consequently, the operating comfort to the user is enhanced.

公开(公告)号：US10020138B1

公开(公告)日：2018-07-10

申请号：US15627104

申请日：2017-06-19

Applicant: Primax Electronics Ltd.

Inventor： Chin-Sung Pan ,  Ming-Han Wu

IPC: H01H3/12 ,  H01H13/70

CPC classification number: H01H13/70 ,  H01H3/125 ,  H01H13/7065 ,  H01H2221/058 ,  H01H2221/062 ,  H01H2233/07

Abstract: A keyboard device includes a key structure, a switch circuit board, a base plate and a buffering sheath. The key structure includes a keycap and a stabilizer bar. The stabilizer bar is connected with the keycap. The base plate includes a connecting structure. The stabilizer bar is penetrated through the connecting structure and connected with the base plate. The buffering sheath is arranged around the stabilizer bar to cover the stabilizer bar. The stabilizer bar and the base plate are made of metallic material. Since the stabilizer bar and the base plate are separated by the buffering sheath, the keyboard device is capable of reducing noise.