Abstract: An eyelets for a tarpaulin includes a female eyelet; and a male eyelet coupled to the female eyelet with a tarpaulin interposed therebetween, wherein the female eyelet and the male eyelet are coupled to each other through compression and bonding while the tarpaulin is inserted therebetween and are made of an olefin-based resin.

Abstract: An optical lens has a beam angle within 29-46 degrees, and includes: an output light region including a first output light surface, a second output light surface around the first output light surface, a buffer surface connecting the first and second output light surfaces, and an outer surface around the second output light surface; an incident light region including a planer incident light surface and an inner surface, the planer incident light surface opposing the first and second output light surfaces, the inner surface around the planer incident light surface and opposing the outer surface, the planer incident light surface and the inner surface connected to each other and forming a slot denting toward the first output light surface; and a mounting portion around and extending outside with respect to the output light region and the incident light region.

Abstract: An optical lens includes a first lens body having a first light exiting surface, a second light exiting surface, a first light incident surface, a second light incident surface, a third light incident surface, and a bottom surface connected to the light incident surfaces; a second lens body having an outer circumference surface, a first inner circumference surface, and an uneven second inner circumference surface; and a mounting body surrounding and connected to the first and second lens bodies, and extending outward with respect to the first and second lens bodies. The first, second and third light incident surfaces are sequentially connected to form on the bottom surface a groove for receiving a light emitting unit. The optical lens has a horizontal beam angle equal to 171.6 degrees ±10% and a vertical beam angle equal to 160 degrees ±10%.

Abstract: An optical lens includes a first lens body having a first light exiting surface, a second light exiting surface, a first light incident surface, a second light incident surface, a third light incident surface, and a bottom surface connected to the light incident surfaces; a second lens body having an outer circumference surface, a first inner circumference surface, and an uneven second inner circumference surface; and a mounting body surrounding and connected to the first and second lens bodies, and extending outward with respect to the first and second lens bodies. The first, second and third light incident surfaces are sequentially connected to form on the bottom surface a groove for receiving a light emitting unit. The optical lens has a horizontal beam angle equal to 171.6 degrees±10% and a vertical beam angle equal to 160 degrees±10%.

Abstract: An optical lens has a beam angle within 29-46 degrees, and includes: an output light region including a first output light surface, a second output light surface around the first output light surface, a buffer surface connecting the first and second output light surfaces, and an outer surface around the second output light surface; an incident light region including a planer incident light surface and an inner surface, the planer incident light surface opposing the first and second output light surfaces, the inner surface around the planer incident light surface and opposing the outer surface, the planer incident light surface and the inner surface connected to each other and forming a slot denting toward the first output light surface; and a mounting portion around and extending outside with respect to the output light region and the incident light region.

Abstract: A micro-nano fluid damper includes a sleeve, a piston assembly and a micro-nano fluid. The sleeve has an accommodating space. The piston assembly has a piston head and at least one piston rod. The piston assembly is movably disposed in the accommodating space. The piston rod extends out of the sleeve from a side of the piston head. The micro-nano fluid is filled between the sleeve and the piston assembly, and the micro-nano fluid flows in the accommodating space by the back-and-forth movement of the piston. When a shear strain rate of the micro-nano fluid is greater than 1s?1, an exponent of velocity of the micro-nano fluid damper is less than 1, and the micro-nano fluid has a shear thinning threshold and a shear thickening threshold.

Abstract: A micro-nano fluid damper includes a sleeve, a piston assembly and a micro-nano fluid. The sleeve has an accommodating space. The piston assembly has a piston head and at least one piston rod. The piston assembly is movably disposed in the accommodating space. The piston rod extends out of the sleeve from a side of the piston head. The micro-nano fluid is filled between the sleeve and the piston assembly, and the micro-nano fluid flows in the accommodating space by the back-and-forth movement of the piston. When a shear strain rate of the micro-nano fluid is greater than 1 s?1, an exponent of velocity of the micro-nano fluid damper is less than 1, and the micro-nano fluid has a shear thinning threshold and a shear thickening threshold.