Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 3, 2019
Patent Application Number
15598531
Date Filed
May 18, 2017
Patent Citations Received
Patent Primary Examiner
Patent abstract
A back frame structure of a vehicle seat including: first and second side frames; and an upper frame that connects the first and second side frames, wherein the first side frame has a constant cross section and the second side frame has a constant cross section, wherein an outline shape of the cross section of the first side frame and an outline shape of the cross section of the second side frame are in line symmetry with respect to a centerline of the back frame in a left and right direction, and wherein a geometrical moment of inertia of the cross section of the first side frame is larger than a geometrical moment of inertia of the cross section of the second side frame.
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