Abstract: Disclosed is a coaxial tensionable automatic lock, including: a hollow connection rod (1), a top plate (3) and a bottom plate (4) respectively installed on two ends of the connection rod, a connection lock apparatus installed at a lower part of the connection rod and fixed on a surface of the bottom plate, wherein the connection lock apparatus includes: a flange (51) connected to a bottom end of the connection rod, a lock cover (52) sleeved onto an outer wall of the flange, a lock core (53) disposed inside an upper-end chamber of the flange, a lock washer (54) disposed between a lower end of the flange and an opened groove on a face of the bottom plate, and a lifting pin (2) installed in an upper-end hollow chamber of the connection rod, wherein a rotation handle (6) is sleeved onto an upper-end outer wall of the connection rod.

Abstract: The present invention discloses a high contrast water-proof LED lamp, including: a casing provided with a reflective cup (10), a PCB (12) disposed on the bottom surface of the casing, an LED chip (1) disposed inside the reflective cup (10), and a light-guiding packaging adhesive (4). The casing is composed of a light color layer (8) in the lower part and a dark color layer (9) in the upper part, and a top surface of the PCB (12) and an outer surface of the light color layer (8) of the casing are provided with black water-proof adhesive sealant (11). The lower part of the inner surface of the reflective cup is a light color layer and the upper part is a dark color layer.