A sports ball includes an inflatable ball or a non-inflatable ball. A photosensitive layer is provided on an outer side of the non-inflatable ball. The inflatable ball includes an inner bladder. An outer side of the inner bladder is bonded to a patch layer through an adhesive layer. A valve core is fixed and penetrates from an inner side of the inner bladder to an outer side of the patch layer, such that the inner side of the inner bladder communicates with the outer side of the patch layer through the valve core. A spacer groove is formed between the outer side of the inner bladder and the patch layer. A sealing strip is bonded to an inner side of the spacer groove; and the photosensitive layer is provided on the outer side of the patch layer. The photosensitive layer includes UV photochromic powder.

A table tennis ball which has, on the spherical surface thereof, a marking to make a ball rotation measurable. The marking contains a number of marking points, which are distributed on the ball surface in such a way that the standard deviation of the lengths of the orthodromes between each of the marking points and the three nearest neighboring points thereof is at least 12% of the average value of these lengths, and the minimum length of the orthodromes between each of the marking points and the three nearest neighboring points thereof is at least 40% of the average value of these lengths.

A luminous safety ball including an inner glowing body and a foam sphere covering the inner glowing body is provided. The inner glowing body is not a perfect sphere, the foam sphere has a non-uniform thickness, and light emitted by the inner glowing body passes through the foam sphere and permeates through a surface of the foam sphere to form light with different brightness thereon.

A tennis ball including a spherical core. The spherical core including an outer surface and a raised wall integrally molded as part of the outer surface.

According to one embodiment, an assembly ball includes a plurality of strips having a circumferential length. The strips are assembled convexly outward as viewed in the radial direction so as to substantially form a sphere as a whole. The strips each overlap other strips at their respective strip overlapping portions where the strips intersect with one another. The strip overlapping portions are joined by a strip joining member.

According to one embodiment, an assembly ball includes a plurality of strips having a circumferential length. The strips are assembled convexly outward as viewed in the radial direction so as to substantially form a sphere as a whole. The strips each overlap other strips at their respective strip overlapping portions where the strips intersect with one another. The strip overlapping portions are joined by a strip joining member.

A toy water ball includes a plurality of petals each having a first edge portion and a second edge portion. Each first edge portion is provided with first magnetic members, and each second edge portion is provided with second magnetic members. When all petals are closed to form a spherical shape, an attraction force is generated between the first magnetic members of each petal and the second magnetic members of the adjacent petal so that the first edge portion of the petal tightly fit the second edge portion of the adjacent petal and a water-carrying cavity is formed. The toy water ball can be closed or opened repeatedly and can be reused. Thus, it is environmentally friendly and clean. Furthermore, the toy water ball can be filled with water in a common water source without a specific pressure, so it can be used in many occasions, and has strong applicability.

A heavy duty, repairable weighted ball used for exercising capable of being loaded to heavy weights and being used on uneven or rough surfaces. The shell of the ball being constructed by a plurality of pieces of material in two layers: an inner encompassing layer capable of holding the weighted material and an outer layer holding the inner layer together. The pieces are joined together such that on being damaged they can be replaced individually. The pieces can be composed of a variety of materials, including repurposed or recycled material.

According to one embodiment, an assembly ball includes a plurality of strips having a circumferential length. The strips are assembled convexly outward as viewed in the radial direction so as to substantially form a sphere as a whole. The strips each overlap other strips at their respective strip overlapping portions where the strips intersect with one another. The strip overlapping portions are joined by a strip joining member.

According to one embodiment, an assembly ball includes a plurality of strips having a circumferential length. The strips are assembled convexly outward as viewed in the radial direction so as to substantially form a sphere as a whole. The strips each overlap other strips at their respective strip overlapping portions where the strips intersect with one another. The strip overlapping portions are joined by a strip joining member.