| 摘要 |
A seat back frame assembly comprising side frame members (17, 17), an upside frame member (18), a downside frame member (19), and a zigzag spring (15) installed between the side frame members (17, 17), wherein the side portion (27) of the downside frame member has a main connector (28)to be fixed to a side frame member (17) and a sub-connector (29). The main connector (28) is positioned below the zigzag spring (15), and the sub-connector (29) is inclined front-upward to allow the sub-connector and the zigzag spring to at least partially overlap each other in a longitudinal direction.
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