US 12,451,305 B2
Button structure
Xu Feng, Jiansu (CN); Sun Kun, Jiansu (CN); Wang Shichao, Jiansu (CN); and Wei Xin, Jiansu (CN)
Assigned to Peratech IP Ltd, North Yorkshire (GB)
Appl. No. 17/919,315
Filed by Peratech IP Ltd., North Yorkshire (GB)
PCT Filed Jun. 11, 2021, PCT No. PCT/GB2021/000070
§ 371(c)(1), (2) Date Oct. 17, 2022,
PCT Pub. No. WO2021/209737, PCT Pub. Date Oct. 21, 2021.
Claims priority of application No. 202010292803.4 (CN), filed on Apr. 15, 2020; and application No. 202020553588.4 (CN), filed on Apr. 15, 2020.
Prior Publication US 2023/0170164 A1, Jun. 1, 2023
Int. Cl. H01H 13/14 (2006.01); H01C 10/10 (2006.01)
CPC H01H 13/14 (2013.01) [H01C 10/10 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A button structure, comprising:
a base layer;
a support structure arranged on the base layer;
an elastic film layer, the elastic film layer covering the support structure and connected to the support structure, the support structure and the elastic film layer defining a cavity above the base layer;
a first upper electrode arranged on a lower surface of the elastic film layer and located in the cavity;
a first lower electrode and a second lower electrode, both arranged on the base layer opposite said first upper electrode and located in the cavity, each said first lower electrode and said second lower electrode is connected to a key signal generation circuit; and
a first variable resistance elastic body between the first upper electrode and the first lower electrode, either arranged on a lower surface of the first upper electrode or arranged on an upper surface of the first lower electrode;
such that when the elastic film layer is elastically deformed in a direction of the base layer, the first variable resistance elastic body connects the first upper electrode with the first lower electrode so as to generate a first signal related to the elastic deformation of the first variable resistance elastic body, and the first upper electrode electrically contacts the second lower electrode to generate a second signal.