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公开(公告)号：US20190387887A1
公开(公告)日：2019-12-26
申请号：US16299092
申请日：2019-03-11
发明人： HENG YAN , BAISONG YAO
摘要： A folding locking mechanism used for a step stool is disclosed. The step stool includes a stool plate, stool legs rotatably arranged on the stool plate and a locking mechanism used for locking the stool legs. The locking mechanism includes a first connecting piece and a pin, wherein the first connecting piece is fixedly connected with the stool plate and is provided with a limiting hole allowing the pin to fall therein, and the pin is limited in the radial direction and is movable in the axial direction, relative to the stool legs.
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公开(公告)号：US20200378183A1
公开(公告)日：2020-12-03
申请号：US16885279
申请日：2020-05-28
发明人： CHEN HUI ZHU , BAISONG YAO
摘要： An assembled ladder includes two supporting leg assemblies, at least one rung and a bridging part, wherein each supporting leg assembly of the two supporting leg assemblies includes a front supporting leg and a rear supporting leg rotatably connected to the front supporting leg, and the at least one rung and the bridging part are detachably connected between the two supporting leg assemblies. During logistics transportation, the at least one rung is detached from the two supporting leg assemblies, the bridging part is also detached from the two supporting leg assemblies, and the two supporting leg assemblies are stacked. In use, two ends of the bridging part are fixedly connected to the two supporting leg assemblies, and two ends of the at least one rung are also fixedly connected to the two supporting leg assemblies.
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公开(公告)号：US20200240208A1
公开(公告)日：2020-07-30
申请号：US16296226
申请日：2019-03-08
发明人： CHEN HUI ZHU , BAISONG YAO
IPC分类号： E06C7/08
摘要： A rung mounting structure used for a ladder includes supporting legs, a rung and a connecting plate, wherein upper ends of the two supporting legs are connected through the connecting plate, the rung is arranged between the supporting legs, the supporting legs are made of metal sections, concave parts are arranged on inner sides of the supporting legs and each are provided with an opening allowing the rung to be inserted therein, and the sides, opposite to the openings, of the concave parts are sealed; and after the rung is inserted into the concave parts, the rung and the supporting legs are circumferentially limited and are fixedly connected.
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