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公开(公告)号：US11289283B1
公开(公告)日：2022-03-29
申请号：US17137476
申请日：2020-12-30
Applicant: Primax Electronics Ltd.
Inventor： Chia-Wei Chang , Chin-Sung Pan , Lei-Lung Tsai
Abstract: A key structure includes a keycap, a membrane circuit board, and a rubber dome between the keycap and the membrane circuit board. The rubber dome includes a ring-shaped structure, a lower foundation structure, a contacting post, a first inclined wall and a second inclined wall. The ring-shaped structure includes a first top surface. The first top surface is upwardly pushed against the keycap. The lower foundation structure includes a first bottom surface. The first bottom surface is pushed downwardly pushed against the membrane circuit board. The contacting post is connected with the ring-shaped structure. The first inclined wall is connected with the ring-shaped structure and the lower foundation structure. The second inclined wall is connected with the ring-shaped structure and the contacting post. There is a first included angle θ1 between the second inclined wall and the first bottom surface. Preferably, 30°≤θ1≤85°.
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公开(公告)号：US11175444B1
公开(公告)日：2021-11-16
申请号：US17183885
申请日：2021-02-24
Applicant: Primax Electronics Ltd.
Inventor： Chin-Sung Pan , Lei-Lung Tsai
Abstract: A luminous keyboard includes a keyboard module and a backlight module. The backlight module is located under the keyboard module. The backlight module includes a light source, a light guide plate and a reflecting plate. The light source includes a conductive substrate and plural light-emitting elements. The light guide plate includes a light input surface, a light exit surface, a bottom surface and a first slot. The light input surface is disposed within the first slot. The reflecting plate is disposed on the bottom surface of the light guide plate. The reflecting plate includes a second slot. The second slot is in communication with the first slot. The conductive substrate is penetrated through the second slot and the first slot. Consequently, the plural light-emitting elements are accommodated within the first slot and aligned with the light input surface.
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公开(公告)号：US10656727B2
公开(公告)日：2020-05-19
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: G06F3/023 , H01H13/704 , G06F3/02 , 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.
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公开(公告)号：US10275041B2
公开(公告)日：2019-04-30
申请号：US15701647
申请日：2017-09-12
Applicant: Primax Electronics Ltd.
Inventor： Bo-An Chen , Chin-Sung Pan
IPC: G06F3/02 , H01H13/86 , H01H13/88 , H01H13/78 , H01H13/81 , H01H3/12 , H01H13/85 , H01H3/42 , H01H15/10
Abstract: A keyboard device includes a circuit board and plural key structures. Each key structure includes a keycap, a hinge element and a base. The hinge element includes a first lateral wing part, a second lateral wing part and a bendable part. The first lateral wing part is connected between the keycap and the base. The second lateral wing part is connected between the keycap and the base. The bendable part is connected between the first lateral wing part and the second lateral wing part. The bendable part is thinner than the first lateral wing part and the second lateral wing part. While the keycap is moved upwardly or downwardly relative to the base, a bending angle of the hinge element and a relative position between the first base shaft and the first receiving hole are changed.
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公开(公告)号：US10199186B1
公开(公告)日：2019-02-05
申请号：US15879874
申请日：2018-01-25
Applicant: Primax Electronics Ltd.
Inventor： Bo-An Chen , Chin-Sung Pan
IPC: H01H13/702 , H01H13/7073 , G06F3/02
Abstract: A keyboard device includes a base plate, a key structure and a membrane wiring board. The key structure is connected with the base plate. The membrane wiring board includes a membrane switch. The membrane wiring board is arranged between the key structure and the base plate. When the keycap of the key structure is moved upwardly or downwardly relative to the base plate, the connecting element between the keycap and the base plate interferes with the membrane wiring board or the base plate. Consequently, a click sound is generated, and a feedback feel is provided.
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Patent Agency Ranking
公开(公告)号：US09941072B1
公开(公告)日：2018-04-10
申请号：US15450437
申请日：2017-03-06
Applicant: Primax Electronics Ltd.
Inventor： Bo-An Chen , Hsien-Tsan Chang , Yi-Chen Wang , Chen-Hsuan Hsu , Chin-Sung Pan , Ming-Han Wu
IPC: H01H13/83 , H01H13/70 , H01H13/14 , H01H3/12 , H01H13/705
CPC classification number: H01H13/70 , H01H3/122 , H01H3/125 , H01H13/14 , H01H13/705 , H01H13/83 , H01H2219/044 , H01H2219/062 , H01H2221/062 , H01H2233/01
Abstract: A keyboard device includes a key structure, a switch circuit board, a base plate, a soft covering element and a buffering pad. The key structure includes a keycap and a stabilizer bar. The stabilizer bar is connected with the keycap and the soft covering element. The soft covering element is disposed on the base plate. An accommodation space is defined by the soft covering element and the base plate collaboratively. The stabilizer bar is inserted into the accommodation space, so that the stabilizer bar is connected with the base plate. The buffering pad is disposed on the base plate and partially received within the accommodation space. The stabilizer bar and the base plate are made of metallic material. Since the stabilizer bar and the base plate are separated by the soft covering element and the buffering pad, the keyboard device is capable of reducing noise.
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公开(公告)号：US20240015892A1
公开(公告)日：2024-01-11
申请号：US17877474
申请日：2022-07-29
Applicant: Primax Electronics Ltd.
Inventor： Yi-Te Chou , Lei-Lung Tsai , Chin-Sung Pan
CPC classification number: H05K3/1216 , H05K3/207 , H05K3/4664 , H05K3/4679 , H05K3/4673
Abstract: A manufacturing method of a membrane circuit board includes the following steps. Firstly, a screen plate, a first substrate body and a second substrate body are provided. Then, a conductive paste and a first circuit pattern are formed on the screen plate. Then, the conductive paste and the first circuit pattern are simultaneously printed on the first substrate body by a screen printing process. The first substrate body, the first circuit pattern and the conductive paste are collaboratively formed as a first membrane substrate. Then, a second circuit pattern is formed on the screen plate. Then, the second circuit pattern is printed on the second substrate body by the screen printing process. The second substrate body and the second circuit pattern are collaboratively formed as a second membrane substrate. Then, the second membrane substrate is aligned with the first membrane substrate.
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公开(公告)号：US20210066004A1
公开(公告)日：2021-03-04
申请号：US16662596
申请日：2019-10-24
Applicant: Primax Electronics Ltd.
Inventor： Bo-An Chen , Chin-Sung Pan
IPC: H01H13/704
Abstract: A membrane circuit structure includes a first film substrate and a first circuit layer. The first circuit layer is disposed on the first film substrate. The first circuit layer contains first conductive silver paste and second conductive silver paste. The first conductive silver paste has a first impedance value. The second conductive silver paste has a second impedance value. The first impedance value is 10 to 15 times the second impedance value.
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公开(公告)号：US10755873B2
公开(公告)日：2020-08-25
申请号：US16395007
申请日：2019-04-25
Applicant: Primax Electronics Ltd.
Inventor： Bo-An Chen , Chien-Hung Liu , Lei-Lung Tsai , Chin-Sung Pan
IPC: H05K1/03 , H01H13/10 , H05K1/11 , H01H13/704 , H01H13/14 , H01H13/7065 , H05K1/09
Abstract: A membrane circuit board includes a first flexible circuit board, a second flexible circuit board and a nanomaterial layer. The nanomaterial layer includes plural polymeric structures. The nanomaterial layer is formed on the first flexible circuit board, the second flexible circuit board and/or a junction region between the edge of the first flexible circuit board and the second flexible circuit board to prevent at least one of the upper metallic conductor line and the lower metallic conductor line from contacting with a specified chemical element. Consequently, the conductive impedance of the upper metallic conductor line and the lower metallic conductor line is not affected by the specified chemical element. Moreover, the present invention also provides a keyboard device with the membrane circuit board.
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公开(公告)号：US10242819B1
公开(公告)日：2019-03-26
申请号：US15865652
申请日：2018-01-09
Applicant: Primax Electronics Ltd.
Inventor： Chia-Feng Lee , Chin-Sung Pan , Lei-Lung Tsai
IPC: H01H13/14 , H01H13/7065 , H01H3/12
Abstract: A key structure includes a supporting plate, a triggering switch, a keycap and a soft element. The triggering switch is located over the supporting plate. The keycap is located over the triggering switch. When an external force is received by the keycap, the triggering switch is pushed by the keycap. The soft element is disposed on an inner surface of the keycap. When the soft element is contacted with the triggering switch, the soft element is subjected to deformation. When the soft element is contacted with the triggering switch, a portion of the triggering switch is inserted into the deformed soft element to limit a sliding action of the triggering switch. Consequently, the mechanical key switch provides enhanced tactile feel.
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