Patent ID: 7926606

Claim:
A fixing device for a foldable chassis of an electric walk-substituting vehicle, the vehicle comprising: a chassis including a main part and a footrest part pivoted to the main part; the main part of the chassis having a pivotal member; a steering mechanism pivoted on a front end of the footrest part; a seat assembly pivoted on an upper side of the main part of the chassis; and a fixing device; the fixing device being positioned next to a pivotal joint between the main part and the footrest part of the chassis to fasten the footrest part to the main part of the chassis when the chassis is in an unfolded in-use position; the fixing device including (a) a detaining protrusion formed on an upper end of the pivotal member of the main part of the chassis; (b) a pulling member; the pulling member having first and second pivotal holes thereon; the pulling member having a receiving recessed portion thereon; the pulling member being pivoted on the footrest part of the chassis at the second pivotal hole thereof; (c) a joining member pivoted on the first pivotal hole of the pulling member; the joining member having a hooked part on one end, and an embedding recessed portion on other end thereof; (d) a pushing member received in the receiving recessed portion of the pulling member; the pushing member being capable of being slid along the receiving recessed portion; the pushing member having an embedded portion on one end thereof; and (e) a returning elastic element joined on the pivotal joint between the pulling member and the footrest part of the chassis with two ends thereof exerting force on the pushing member and the joining member respectively; the fixing device being movable to a fastening position to fasten the footrest part to the main part of the chassis when the chassis is in said unfolded in-use position, wherein the hooked part of the joining member will be hooked over the detaining protrusion, and the embedded portion of the pushing member embedded in the embedding recessed portion of the joining member.