| 摘要 |
A collapsible baby jumper includes a base frame, and a seat frame disposed above the base frame movable to and from an upright or erected position and a collapsed position, supported on the base frame by a main diagonal brace member, arranged at each side of the seat and base frames, extending diagonally upwardly from the base frame, and having its upper end pivotally connected to the seat frame; each brace member has a pivot pin projecting therefrom at a position between its ends, and there is secured to each side of the base frame adjacent the pivot pins a pivot support means having two pivot support surfaces, one for upright position and the other for collapsed position, with a guide in which the adjacent pivot pin is engaged for controlling movement of the pin to and from the two support surfaces; and the forward end of each brace member is connected to the base frame by a downwardly extending tension spring which in its collapsed position forms a rigid link pivotally connecting the forward end of the brace member to the base frame.
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