| CPC G03B 15/06 (2013.01) [G03B 2215/0589 (2013.01)] | 20 Claims |

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1. A quick-locking softbox chuck, comprising:
an umbrella disc seat (1) having an annular shape and a lower surface thereof being provided with at least one through groove (2);
a plurality of first support seats (31) and second support seats (32) movably connected to the umbrella disc seat (1), wherein the second support seat (32) is located in the through groove (2);
a locking unit (5) having a locked state in which the second support seat (32) is unfolded with respect to the umbrella disc seat (1), and an unlocked state in which the second support seat (32) is turned over to be below the umbrella disc seat (1) via the through groove (2); and
when the locking unit (5) is in the unlocked state, the second support seat (32) is turned over to be below the umbrella disc seat (1); and the plurality of first support seats (31) are automatically swung and folded in a direction vertically overlapping with the second support seat (32), so that the softbox is flat.
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