The awning is a commercial product. The system uses the motor to drive the aluminum alloy coil to rotate, so that the fabric wound on the coil can rise and fall. At the same time, the fabric is tightened by the spring force in the arm support rod. The maximum opening angle of the system is 0~130 degrees, which can be operated by various control methods such as switch, remote control, and wind control. The awning has a comprehensive external shading function, which can completely block ultraviolet radiation, reduce indoor temperature, and reduce air conditioning load; it has energy-saving effect, which is of great significance from the perspective of energy saving and environmental protection; The strong sunlight is reflected into the interior in the form of diffused light, so that the interior light is bright and not dazzling, and it does not affect the landscape outside the window seen from the interior, extending people's living space from indoors to outdoors, creating a new living space; the special anti-ultraviolet function of 4×4 awning not only protects human skin from ultraviolet rays, but also greatly prolongs the service life of interior decoration and furniture. The sunshade has a variety of cloth patterns and colors. Users can choose according to their needs.
A winch is a mechanical device that is used to pull in (wind up) or let out (wind out) or otherwise adjust the tension of a rope or wire rope (also called "cable" or "wire cable"). In its simplest form, it consists of a spool (or drum) attached to a hand crank. Traditionally, winches on ships accumulated wire or rope on the drum; those that do not accumulate, and instead pass on the wire/rope (see yacht photo above), are called capstans. Despite this, sailboat capstans are most often referred to as winches. Winches are the basis of such machines as tow trucks, steam shovels and elevators. More complex designs have gear assemblies and can be powered by electric, hydraulic, pneumatic or internal combustion drives. It might include a solenoid brake and/or a mechanical brake or ratchet and pawl which prevents it unwinding unless the pawl is retracted. The rope may be stored on the winch. When trimming a line on a sailboat , the crew member turns the winch handle with one hand, while tailing (pulling on the loose tail end) with the other to maintain tension on the turns. Some winches have a "stripper" or cleat to maintain tension. These are known as " self-tailing" winc hes.