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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
发明人： Sheng-Fan Chang , Che-An Li , Chang-Huan Shen , Chuang-Shu Jhuang
摘要： 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：US11145474B1
公开(公告)日：2021-10-12
申请号：US17004828
申请日：2020-08-27
发明人： Chin-Sung Pan , Chien-Hung Liu , Lei-Lung Tsai , Sheng-Fan Chang , Tsu-Yi Chen , Chun-Yuan Liu
摘要： A keyboard device includes plural key structures. Each key structure includes a supporting plate, a keycap, a connecting member and a hook element. The keycap is located over the supporting plate, and movable upwardly or downwardly relative to the supporting plate. The connecting member is connected between the supporting plate and the keycap. The hook element is installed on the supporting plate. The connecting member is connected with the supporting plate through the hook element. The supporting plate is made of a first material with a first specific gravity. The hook element is made of a second material with a second specific gravity. The second specific gravity is higher than the first specific gravity.
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公开(公告)号：US20190013161A1
公开(公告)日：2019-01-10
申请号：US15811632
申请日：2017-11-13
发明人： Sheng-Fan Chang
IPC分类号： H01H13/70
摘要： The present invention relates to a keyboard, including a base plate, a switch circuit board, a connecting element, a keycap, and a connecting shaft. The switch circuit board is disposed on the base plate, the connecting element is located on the switch circuit board and is separately connected to the keycap and the base plate, the connecting shaft is disposed on the connecting element and extends from the connecting element to be connected to the base plate. When the keycap is pressed and the connecting element swings, the connecting shaft rotates and is separately in contact with the base plate and the switch circuit board, so as to weaken the shake of the connecting element. Therefore, the operation stability of the keyboard can be improved.
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公开(公告)号：US20240242903A1
公开(公告)日：2024-07-18
申请号：US18111480
申请日：2023-02-17
发明人： Lei-Lung Tsai , Sheng-Fan Chang , Che-An Li , Chang-Huan Shen
摘要： 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
发明人： Che-An Li , Lei-Lung Tsai , Sheng-Fan Chang
IPC分类号： H01H13/7065 , H01H3/12
摘要： 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：US11342133B1
公开(公告)日：2022-05-24
申请号：US17211656
申请日：2021-03-24
发明人： Sheng-Fan Chang , Lei-Lung Tsai
摘要： A key structure includes a circuit board, a triggering part and an elastic element. The elastic element includes an upper support portion, a lower support portion, an upper elastic portion and a lower elastic portion. The lower support portion is located beneath the upper support portion and connected to a peripheral region of the circuit board. The upper elastic portion is connected between the triggering part and the upper support portion. The lower elastic portion is connected between the upper support portion and the lower support portion. The lower elastic portion includes a first section and a second section connected to each other. The first section is connected to the upper support portion. The second section is connected to the lower support portion. There is a vacant space between the second section and the circuit board.
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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
发明人： Che-An Li , Sheng-Fan Chang
摘要： 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：US20240242902A1
公开(公告)日：2024-07-18
申请号：US18124522
申请日：2023-03-21
发明人： Lei-Lung Tsai , Sheng-Fan Chang , Chang-Huan Shen
摘要： A keycap includes a lower plate, a first magnetic element, an upper cover and a second magnetic element. The lower plate has two first engaging portions, which are respectively disposed on two opposite sides of an upper surface of the lower plate. The first magnetic element is fixed on the lower plate. The upper cover is configured to be detachably assembled on the lower plate, in which the upper cover has two second engaging portions respectively disposed on two opposite sides of an inner top surface of the upper cover and respectively corresponding to the two first engaging portions. The second magnetic element is fixed on the inner top surface of the upper cover, and is configured to magnetically attract the first magnetic element.
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公开(公告)号：US11626259B1
公开(公告)日：2023-04-11
申请号：US17703320
申请日：2022-03-24
发明人： Lei-Lung Tsai , Sheng-Fan Chang , Chin-Sung Pan
IPC分类号： H01H1/06
摘要： A membrane circuit structure having a plurality of switch regions includes first, second and third membranes and a spacer layer. The second membrane is beneath the first membrane, and a lower surface of the second membrane is provided with a conductive pattern in at least one of the switch regions. The spacer layer is disposed between the first and second membranes. The third membrane is beneath the second membrane, and an upper surface of the third membrane is provided with first and second trigger portions separated from each other in the at least one of the switch regions, and the conductive pattern is able to be in contact with the first and second trigger portions, so that the first and second trigger portions are able to be electrically connected to each other through the conductive pattern.
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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
发明人： Lei-Lung Tsai , Sheng-Fan Chang , Che-An Li , Chang-Huan Shen
IPC分类号： H01H13/7065
摘要： 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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