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公开(公告)号：US20230014686A1
公开(公告)日：2023-01-19
申请号：US17412260
申请日：2021-08-26
Applicant: Primax Electronics Ltd.
Inventor： Lei-Lung Tsai , Sheng-Fan Chang , Che-An Li , Chang-Huan Shen
IPC: H01H13/7065
Abstract: A key structure includes a membrane circuit board, an elastic element and a high impedance layer. The membrane circuit board includes a lower plate, an upper plate, a spacer plate and a circuit layer. The upper plate is located over the lower plate. The upper plate has an opening through the upper plate. The spacer plate is arranged between the lower plate and the upper plate. The circuit layer is arranged between the spacer plate and the upper plate. The elastic element is disposed on the membrane circuit board and substantially aligned with opening. The high impedance layer is disposed on a bottom surface of a bottom part of the elastic element and disposed within the opening of the upper plate. The high impedance layer is in contact with a part of the circuit layer.
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公开(公告)号：US20190221385A1
公开(公告)日：2019-07-18
申请号：US16189861
申请日：2018-11-13
Applicant: Primax Electronics Ltd.
Inventor： Sheng-Fan Chang , Che-An Li , Ding-Hsiang Pan , Chia-Feng Lee
IPC: H01H13/88 , H01H3/12 , H01H13/7065 , H01H13/14
Abstract: The present invention provides a keyboard device, including a plurality of keys, thin film circuit boards, and key bottom plates. A connection component of the key is connected between a keycap of the key and a bottom plate connection portion of key bottom plate, and the bottom plate connection portion has a connection portion surface corresponding to the keycap and a raised portion formed on the connection portion surface. When the keycap moves downward relative to the thin film circuit board, a lower surface of the keycap knocks the raised portion.
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公开(公告)号：US20240266126A1
公开(公告)日：2024-08-08
申请号：US18123869
申请日：2023-03-20
Applicant: Primax Electronics Ltd.
Inventor： Sheng-Fan Chang , Che-An Li , Chang-Huan Shen , Chuang-Shu Jhuang
Abstract: The present invention provides a keycap, which includes a lower plate and an upper cover. The lower plate has at least two engaging holes recessed inwardly from an upper surface of the lower plate and separated from each other. The upper cover is configured to be detachably assembled on the lower plate, in which the upper cover has at least two buckle members disposed on an inner top surface of the upper cover and respectively corresponding to the at least two engaging holes, and each of the buckle members has two buckle portions separated from each other, and each of the buckle portions has a protrusion protruding laterally outward, and each of the protrusions is configured to engage with a portion of the corresponding engaging hole.
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公开(公告)号：US11624867B1
公开(公告)日：2023-04-11
申请号：US17956593
申请日：2022-09-29
Applicant: Primax Electronics Ltd.
Inventor： Che-An Li , Lei-Lung Tsai
Abstract: The present disclosure provides a keycap, including: a light-guiding microstructure layer made of a first material, the light-guiding microstructure layer including a base layer and a plurality of microstructures disposed on a lower surface of the base layer; and a light-transmitting layer disposed over the light-guiding microstructure layer and in contact with the base layer, the light-transmitting layer being made of a second material different from the first material. The present disclosure further provides a method of manufacturing the above-mentioned keycap and a key structure including the above-mentioned keycap.
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公开(公告)号：US10960587B2
公开(公告)日：2021-03-30
申请号：US16017192
申请日：2018-06-25
Applicant: Primax Electronics Ltd.
Inventor： Yi-Te Chou , Che-An Li
Abstract: A keycap forming method includes the following steps. Firstly, a stabilizer bar is fixed on a first male mold. Then, a keycap is formed through a second male mold and a female mold according to an injection molding process. Then, the second male mold and the female mold are separated from each other, so that the keycap is fixed on the female mold. Then, the first male mold and the female mold are stacked on each other, so that the stabilizer bar and the keycap are combined together. Then, the first male mold and the female mold are separated from each other. Consequently, the stabilizer bar is detached from the first male mold. By using the keycap forming method, it is not necessary to manually assemble the stabilizer bar with the keycap.
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Patent Agency Ranking
公开(公告)号：US20240242903A1
公开(公告)日：2024-07-18
申请号：US18111480
申请日：2023-02-17
Applicant: Primax Electronics Ltd.
Inventor： Lei-Lung Tsai , Sheng-Fan Chang , Che-An Li , Chang-Huan Shen
Abstract: The present invention provides a keycap, which includes a lower plate and an upper cover. The lower plate has two openings respectively through two opposite sides of the lower plate to respectively define two elastic arms. The upper cover is configured to be detachably assembled on the lower plate, in which the upper cover has two abutting portions and a protrusion, and the two abutting portions are respectively disposed on two opposite inner sides of the upper cover and respectively correspond to the two elastic arms, and each of the two abutting portions is configured to abut against a portion of the corresponding elastic arm, and the protrusion is disposed on an inner top surface of the upper cover and corresponds to one of the two openings.
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公开(公告)号：US20220399171A1
公开(公告)日：2022-12-15
申请号：US17388244
申请日：2021-07-29
Applicant: Primax Electronics Ltd.
Inventor： Che-An Li , Lei-Lung Tsai , Sheng-Fan Chang
IPC: H01H13/7065 , H01H3/12
Abstract: A keyboard device includes plural key structures. Each key structure includes a keycap, a membrane circuit board, a key frame, an elastic conduction element and a connecting member. The membrane circuit board is located under the keycap. The key frame is arranged between the keycap and the membrane circuit board. The key frame includes a frame body and a bottom plate. The bottom plate is arranged between the key frame and the membrane circuit board. The bottom plate includes a perforation. The elastic conduction element is arranged between the keycap and the bottom plate of the key frame. The perforation is covered by the elastic conduction element. The connecting member is arranged between the keycap and the bottom plate of the key frame. The keycap is movable upwardly or downwardly relative to the bottom plate of the key frame through the connecting member.
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公开(公告)号：US20190371545A1
公开(公告)日：2019-12-05
申请号：US16044746
申请日：2018-07-25
Applicant: Primax Electronics Ltd.
Inventor： Che-An Li , Sheng-Fan Chang
Abstract: A keycap forming method includes the following steps. Firstly, a stabilizer bar is formed through a first male mold and a first female mold according to an injection molding process, and a keycap is formed through a second male mold and a second female mold according to the injection molding process. Then, the stabilizer bar is fixed on the first male mold, and the keycap is fixed on the second female mold. Then, the first male mold and the second female mold are stacked on each other, so that the stabilizer bar and the keycap are combined together. Then, the first male mold and the second female mold are separated from each other, so that the stabilizer bar is detached from the first male mold. By using the keycap forming method, it is not necessary to manually assemble the stabilizer bar with the keycap.
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公开(公告)号：US20250063655A1
公开(公告)日：2025-02-20
申请号：US18368471
申请日：2023-09-14
Applicant: Primax Electronics Ltd.
Inventor： Lei-Lung Tsai , Che-An Li
Abstract: A membrane circuit board is provided, which has at least one switch region. The membrane circuit board includes first and second membranes, a spacer layer, a first carbon ink contact, and a corresponding contact. The second membrane is located over the first membrane. The spacer layer is located between the first and second membranes, and has an opening in the switch region. The first carbon ink contact is disposed on one of a portion of an upper surface of the first membrane corresponding to the opening and a portion of a lower surface of the second membrane corresponding thereto. The corresponding contact corresponds to the first carbon ink contact, and is disposed on the other thereof. The corresponding contact is a second carbon ink contact or a conductive contact, and resistance of the conductive contact is less than resistance of the first carbon ink contact.
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公开(公告)号：US11887792B1
公开(公告)日：2024-01-30
申请号：US18077103
申请日：2022-12-07
Applicant: Primax Electronics Ltd.
Inventor： Che-An Li , Lei-Lung Tsai
IPC: H01H13/7065 , H01H3/12 , H01H13/14
CPC classification number: H01H13/7065 , H01H3/12 , H01H13/14 , H01H2231/002
Abstract: A key structure includes a base plate, a keycap, a membrane circuit board and an elastic plate. The keycap is located over the base plate. The keycap includes a top wall and a skirt part. The membrane circuit board is arranged between the keycap and the base plate. The membrane circuit board includes a pressure sensing structure. The elastic plate is arranged between the keycap and the membrane circuit board. The elastic plate includes a triggering part. The triggering part is extended toward the membrane circuit board and aligned with the pressure sensing structure. While the keycap is moved downwardly toward the elastic plate, the skirt part of the keycap is correspondingly moved to press the elastic plate. Consequently, the triggering part is moved downwardly to press the pressure sensing structure.
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