An angle-adjustable double panel shading assembly, comprising: a rotation component having an axial aperture, the axial aperture defining an inner circumferential surface about a hollow interior of the rotation component; a stopper including an axial shaft insertion hole therein; a fixing shaft extending through the axial shaft insertion hole of the stopper and the axial aperture of the rotation component; a spring disposed about the fixing shaft; and a cover operably rotatably engaging one of a pair of panels (111, 112) wound thereon; characterised in that: the inner circumferential surface of the rotation component includes at least one axial groove for holding a ball therein; the stopper is positioned within the hollow interior of the rotation component and includes an outer circumferential surface having a groove (333, 334) therein, wherein the groove is configured to cooperatively hold the ball in the at least one axial groove of the rotation component and includes a circumferential path with a locking position therein, and wherein the locking position prevents circumferential motion of the ball about the outer circumferential surface of the stopper; the angle-adjustable double panel shading assembly comprises a spring clutch including the fixing shaft and the spring wherein the spring includes a projection engaging a retaining fixture of the stopper; and the cover is disposed about the rotation component and wherein the rotation component is configured to move the ball through the groove (333, 334) of the stopper into the locking position therein, thereby rotating and engaging the rotation component with the stopper to expandingly twist the spring of the spring clutch about the fixing shaft, wherein expanding movement of the spring about the fixing shaft allows adjustment of an angle of engagement between the fixing shaft and the rotation component to adjust a light transmission through the double panel shading assembly. a rotation component having an axial aperture, the axial aperture defining an inner circumferential surface about a hollow interior of the rotation component; a stopper including an axial shaft insertion hole therein; a fixing shaft extending through the axial shaft insertion hole of the stopper and the axial aperture of the rotation component; a spring disposed about the fixing shaft; and a cover operably rotatably engaging one of a pair of panels (111, 112) wound thereon; characterised in that: the inner circumferential surface of the rotation component includes at least one axial groove for holding a ball therein; the stopper is positioned within the hollow interior of the rotation component and includes an outer circumferential surface having a groove (333, 334) therein, wherein the groove is configured to cooperatively hold the ball in the at least one axial groove of the rotation component and includes a circumferential path with a locking position therein, and wherein the locking position prevents circumferential motion of the ball about the outer circumferential surface of the stopper; the angle-adjustable double panel shading assembly comprises a spring clutch including the fixing shaft and the spring wherein the spring includes a projection engaging a retaining fixture of the stopper; and the cover is disposed about the rotation component and wherein the rotation component is configured to move the ball through the groove (333, 334) of the stopper into the locking position therein, thereby rotating and engaging the rotation component with the stopper to expandingly twist the spring of the spring clutch about the fixing shaft, wherein expanding movement of the spring about the fixing shaft allows adjustment of an angle of engagement between the fixing shaft and the rotation component to adjust a light transmission through the double panel shading assembly. the inner circumferential surface of the rotation component includes at least one axial groove for holding a ball therein; the stopper is positioned within the hollow interior of the rotation component and includes an outer circumferential surface having a groove (333, 334) therein, wherein the groove is configured to cooperatively hold the ball in the at least one axial groove of the rotation component and includes a circumferential path with a locking position therein, and wherein the locking position prevents circumferential motion of the ball about the outer circumferential surface of the stopper; the angle-adjustable double panel shading assembly comprises a spring clutch including the fixing shaft and the spring wherein the spring includes a projection engaging a retaining fixture of the stopper; and the cover is disposed about the rotation component and wherein the rotation component is configured to move the ball through the groove (333, 334) of the stopper into the locking position therein, thereby rotating and engaging the rotation component with the stopper to expandingly twist the spring of the spring clutch about the fixing shaft, wherein expanding movement of the spring about the fixing shaft allows adjustment of an angle of engagement between the fixing shaft and the rotation component to adjust a light transmission through the double panel shading assembly.