Abstract: A cord adjusting assembly for a cover includes an affixing body including a front receiving slot and a rear receiving slot; a rotatable shaft coupled to the affixing body; a cord attached to the cover; wherein the front receiving slot, the rear receiving slot, and the rotatable shaft are cooperated with the cord to tighten or loosen the cord.

Abstract: A multi-functional fence system includes a plurality of vertical supporting frames; a plurality of horizontal supporting frames; and a plurality of connector assemblies configured to connect the vertical supporting frames and the horizontal supporting frames; wherein the vertical supporting frame is rotated with respect to the horizontal supporting frame via the connector assembly.

Abstract: A swimming pool cover system includes at least one retaining assembly configured for attachment of a flexible pool cover with a pool deck; at least one adjusting assembly configured for extending and retracting the flexible pool cover, and at least one rolling support assembly attached along edges of the flexible pool cover and configured for tightening the flexible pool cover.

Abstract: A height-adjustable and detachable fence system includes a plurality of fence sections pivotally coupled with each other; and a plurality of height adjustable units detachably coupled to the fence sections; wherein the fence section includes at least one horizontal rail, and a plurality of picket members uprightly coupled on the horizontal rail; wherein the height adjustable unit includes a base body supported on a ground and a post body detachably connected to the base body.

Abstract: A height-adjustable and detachable fence system includes a plurality of fence sections pivotally coupled with each other; and a plurality of height adjustable units detachably coupled to the fence sections; wherein the fence section includes at least one horizontal rail, and a plurality of picket members uprightly coupled on the horizontal rail; wherein the height adjustable unit includes a base body supported on a ground and a post body detachably connected to the base body.