Patents by Inventor Li-Qiang Chen
Li-Qiang Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11482387Abstract: A membrane circuit board includes a first film substrate, a second film substrate, an insulating spacer substrate and a waterproof structure. The first circuit layer is installed on the first film substrate. A second circuit layer is installed on the second film substrate. The insulating spacer substrate arranged between the first film substrate and the second film substrate. The first circuit layer is arranged between the first film substrate and the insulating spacer substrate. The second circuit layer is arranged between the second film substrate and the insulating spacer substrate. The waterproof structure includes a first welding layer and a second welding layer. The first welding layer is arranged between the first film substrate and the insulating spacer substrate. The second welding layer is arranged between the second film substrate and the insulating spacer substrate.Type: GrantFiled: September 24, 2020Date of Patent: October 25, 2022Assignee: PRIMAX ELECTRONICS LTD.Inventors: Liu-Bing Cai, Li-Xiong Deng, Fu-Zhou Wei, Li-Qiang Chen, Xiao-Ping Wang
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Patent number: 11450492Abstract: A key structure includes a switch circuit layer, a pedestal and a keycap. The pedestal includes a protrusion part and a hollow part. The keycap includes a buffering hook and a locking hook. The pedestal is disposed on the switch circuit layer. The keycap is disposed within the hollow part of the pedestal. The buffering hook and the locking hook of the keycap are aligned with the protrusion part of the pedestal. While the keycap is moved in a direction away from the switch circuit layer, the buffering hook is contacted with the protrusion part and then the locking hook is contacted with the protrusion part.Type: GrantFiled: September 23, 2021Date of Patent: September 20, 2022Assignee: PRIMAX ELECTRONICS LTD.Inventors: Xiao-Jun Chu, Li-Qiang Chen
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Publication number: 20220068575Abstract: A membrane circuit board includes a first film substrate, a second film substrate, an insulating spacer substrate and a waterproof structure. The first circuit layer is installed on the first film substrate. A second circuit layer is installed on the second film substrate. The insulating spacer substrate arranged between the first film substrate and the second film substrate. The first circuit layer is arranged between the first film substrate and the insulating spacer substrate. The second circuit layer is arranged between the second film substrate and the insulating spacer substrate. The waterproof structure includes a first welding layer and a second welding layer. The first welding layer is arranged between the first film substrate and the insulating spacer substrate. The second welding layer is arranged between the second film substrate and the insulating spacer substrate.Type: ApplicationFiled: September 24, 2020Publication date: March 3, 2022Inventors: Liu-Bing Cai, Li-Xiong Deng, Fu-Zhou Wei, Li-Qiang Chen, Xiao-Ping Wang
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Patent number: 11204651Abstract: A keyboard device includes a membrane circuit board and a key structure over the membrane circuit board. The key structure includes a keycap, a plunger structure, a key pedestal and an elastic element. The plunger structure is arranged between the keycap and the elastic element. At least a portion of the keycap is disposed within a pedestal dust-storage chamber of the key pedestal. At least a portion of the plunger structure is disposed within a guiding chamber of the key pedestal. Due to the relative location between the keycap, the plunger structure and the key pedestal, the path of the dust to enter the guiding chamber is extended or blocked. Consequently, the dust-proof efficacy is enhanced.Type: GrantFiled: February 24, 2020Date of Patent: December 21, 2021Assignee: PRIMAX ELECTRONICS LTD.Inventors: Liu-Bing Cai, Li-Qiang Chen
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Patent number: 11094479Abstract: A key structure includes a keycap, a pedestal and an elastic element. The keycap includes a main body and a coupling shaft. The pedestal includes a key slot. The key slot has an upper part and a lower part. The coupling shaft is penetrated through the upper part of the key slot and movable within the key slot upwardly or downwardly. The elastic element is installed in the lower part of the key slot. After an external force applied to the keycap is released, the elastic element is elastically restored, so that the keycap is returned to an original position. At the same time, the buffering elements in the key slot interfere with the coupling shaft. Consequently, an ascending speed of the keycap is reduced, and a click sound generated from the collision between keycap and the pedestal is reduced.Type: GrantFiled: May 28, 2020Date of Patent: August 17, 2021Assignee: PRIMAX ELECTRONICS LTD.Inventors: Xiao-Jun Chu, Li-Qiang Chen, Liu-Bing Cai, Sheng-An Tsai, Chun-Che Wu
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Publication number: 20210181861Abstract: A keyboard device includes a membrane circuit board and a key structure over the membrane circuit board. The key structure includes a keycap, a plunger structure, a key pedestal and an elastic element. The plunger structure is arranged between the keycap and the elastic element. At least a portion of the keycap is disposed within a pedestal dust-storage chamber of the key pedestal. At least a portion of the plunger structure is disposed within a guiding chamber of the key pedestal. Due to the relative location between the keycap, the plunger structure and the key pedestal, the path of the dust to enter the guiding chamber is extended or blocked. Consequently, the dust-proof efficacy is enhanced.Type: ApplicationFiled: February 24, 2020Publication date: June 17, 2021Inventors: Liu-Bing Cai, Li-Qiang Chen
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Patent number: 10903028Abstract: A rotary switch structure includes a sleeve, a seat body, an elastic ring, plural push elements and a fixing element. The seat body is accommodated within the sleeve. The elastic ring is disposed on the seat body. The plural push elements are disposed on the elastic ring, and provide a pushing force to the elastic ring. The fixing element is fixed in the sleeve and contacted with the plural push elements. The plural push elements are fixed on the elastic ring by the fixing element. The elastic ring absorbs the pushing force, so that a friction force between the at least one push element and the elastic ring is adjustable. Consequently, the rotating feel of the rotary switch structure is adjustable according to the practical requirements.Type: GrantFiled: June 24, 2019Date of Patent: January 26, 2021Assignee: PRIMAX ELECTRONICS LTD.Inventors: Liu-Bing Cai, Li-Xiong Deng, Li-Qiang Chen
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Publication number: 20200312589Abstract: A rotary switch structure includes a sleeve, a seat body, an elastic ring, plural push elements and a fixing element. The seat body is accommodated within the sleeve. The elastic ring is disposed on the seat body. The plural push elements are disposed on the elastic ring, and provide a pushing force to the elastic ring. The fixing element is fixed in the sleeve and contacted with the plural push elements. The plural push elements are fixed on the elastic ring by the fixing element. The elastic ring absorbs the pushing force, so that a friction force between the at least one push element and the elastic ring is adjustable. Consequently, the rotating feel of the rotary switch structure is adjustable according to the practical requirements.Type: ApplicationFiled: June 24, 2019Publication date: October 1, 2020Inventors: Liu-Bing Cai, Li-Xiong Deng, Li-Qiang Chen
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Patent number: D507254Type: GrantFiled: July 23, 2004Date of Patent: July 12, 2005Assignee: Benq CorporationInventor: Li-Qiang Chen
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Patent number: D514559Type: GrantFiled: June 10, 2004Date of Patent: February 7, 2006Assignee: Benq CorporationInventor: Li-Qiang Chen
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Patent number: D522506Type: GrantFiled: November 17, 2004Date of Patent: June 6, 2006Assignee: Benq CorporationInventor: Li-Qiang Chen