NOVELTY - An adjustable double spring pressing mechanism comprises back bracket (1), guide lever (2), operating handle (3), ejecting spring (4), front bracket (5), locking nut (6), pressing spring (7), pressing block (8), sliding pin (9), lead (10) and panel (11). The outer diameter of the guide lever is in clearance fit with the inner hole of the front bracket and the inner hole of the back bracket.    USE - Adjustable double spring pressing mechanism used in press welding panels, e.g. solar panels.    ADVANTAGE - The adjustable double spring pressing mechanism can tightly press panels of different thicknesses, and improve welding efficiency, safety, and reliability of the panels.    DETAILED DESCRIPTION - An adjustable double spring pressing mechanism comprises back bracket (1), guide lever (2), operating handle (3), ejecting spring (4), front bracket (5), locking nut (6), pressing spring (7), pressing block (8), sliding pin (9), lead (10) and panel (11). The outer diameter of the guide lever is in clearance fit with the inner hole of the front bracket and the inner hole of the back bracket. The pressing block has part (A) with an outer diameter that is in interference fit with the inner diameter of the ejecting spring; and part (B). The guide lever has part (C) with an outer hole that is in big clearance fit with the inner diameter of the ejecting spring; and part (D) with an inner hole that is in clearance fit with the outer diameter of part (B) of the pressing block and simultaneously in big clearance fit with the outer diameter of the ejecting spring. The guide lever can move in the guide slot formed by the back bracket and the front bracket to finish welding pressing on panels of different thicknesses.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic sectional view illustrating the adjustable double spring pressing mechanism.    Back bracket (1)    Guide lever (2)    Operating handle (3)    Ejecting spring (4)    Front bracket (5)    Locking nut (6)    Pressing spring (7)    Pressing block (8)    Sliding pin (9)    Lead (10)    Panel (11)