Swimming pool cover

A swimming pool cover, comprising:

• a flexible covering layer configured to enclose and cover a swimming pool;
• a tightening strap disposed around the flexible covering layer;
• a tensioning device, comprising:
• a retaining support and a tensioning support pivotally connected to each other, wherein a first elastic limiting member is disposed on the retaining support, and a second elastic limiting member is disposed on the tensioning support;
• a winding shaft portion extending through a pivot connection between the retaining support and the tensioning support;
• and
• a one-way ratchet disposed on the winding shaft portion, wherein the tightening strap is wound around the winding shaft portion;
• wherein the tensioning support comprises:
• a tensioning bracket rotatably disposed on the winding shaft portion;
• and
• a rubber-coated handle fixedly disposed on the tensioning bracket at one end distal from the winding shaft;
• wherein the second elastic limiting member comprises:
• a second locking block slidably disposed within second guide slots of the tensioning bracket;
• a second spring connected respectively to the second locking block and the tensioning bracket, wherein the second spring applies elastic force to the second locking block, causing the second locking block to engage with teeth of the one-way ratchet;
• and
• a rubber-coated grip disposed on the second locking block, wherein the rubber-coated grip forms a handle portion facing outward an outer side of the tensioning bracket;
• wherein the rubber-coated handle comprises:
• a rubber coating layer encasing the second locking block;
• a protruding rubber block connected to a top of the rubber coating layer, with the handle portion having a step shape being formed between the protruding rubber block and the rubber coating layer;
• a cushioning layer disposed on a surface of the handle portion;
• and
• a first convex-concave anti-slip portion disposed on the surface of the handle portion or on a surface of the cushioning layer;
• wherein the winding shaft portion has a locked state and a winding state by rotating the tensioning support;
• wherein, in the locked state, the tensioning support is pulled to rotate toward the retaining support, the second elastic limiting member disengages from the one-way ratchet, and the one-way ratchet is locked by the first elastic limiting member to prevent rotation of the winding shaft portion;
• wherein, in the winding state, the tensioning support is pulled to rotate away from the retaining support, the first elastic limiting member disengages from the one-way ratchet, and the one-way ratchet is locked by the second elastic limiting member and rotates with the tensioning support, causing the winding shaft portion to rotate;
• and
• wherein the tightening strap is wound by the rotation of the winding shaft portion to tighten the flexible covering layer around an outer side wall of the pool.

A swimming pool cover, comprising:

• a flexible covering layer configured to enclose and cover a swimming pool, and comprising a central portion and a peripheral portion, wherein the peripheral portion is connected to the central portion, the central portion is configured to cover a pool opening, and the peripheral portion is configured to enclose the outer side wall of the pool;
• a tightening strap disposed around the flexible covering layer;
• and
• a tensioning device, comprising:
• a retaining support and a tensioning support pivotally connected to each other, wherein a first elastic limiting member is disposed on the retaining support, and a second elastic limiting member is disposed on the tensioning support;
• a winding shaft portion extending through a pivot connection between the retaining support and the tensioning support;
• and
• a one-way ratchet disposed on the winding shaft portion, wherein the tightening strap is wound around the winding shaft portion;
• wherein a lug is disposed on the peripheral portion, the lug forms a rope passage, and the tightening strap passes through the rope passage;
• wherein the lug further forms a mounting opening located below the rope passage, the mounting opening being configured for connection to a weight or a ground stake;
• wherein a cover shroud is further disposed on the peripheral portion, the cover shroud being attached to the peripheral portion via a hook-and-loop fastener and configured to cover the tensioning device;
• wherein the winding shaft portion has a locked state and a winding state by rotating the tensioning support;
• wherein, in the locked state, the tensioning support is pulled to rotate toward the retaining support, the second elastic limiting member disengages from the one-way ratchet, and the one-way ratchet is locked by the first elastic limiting member to prevent rotation of the winding shaft portion;
• wherein, in the winding state, the tensioning support is pulled to rotate away from the retaining support, the first elastic limiting member disengages from the one-way ratchet, and the one-way ratchet is locked by the second elastic limiting member and rotates with the tensioning support, causing the winding shaft portion to rotate;
• and
• wherein the tightening strap is wound by the rotation of the winding shaft portion to tighten the flexible covering layer around an outer side wall of the pool.