CN201211416Y - Surface layer of sport ball - Google Patents

Abstract

The utility model provides a surface layer of a sports ball, which is composed of a plurality of polygonal combination pieces assembled into a spherical shape, and has a hole for a gas nozzle to pass through on the surface layer, and is characterized in that each side of each polygonal combination piece is an outwardly convex arc side. The design of the outwardly convex arc side can make the ball made according to the utility model more round, improve the use performance, feel and ball quality of the sports ball, and extend its service life.

Description

sports ball skin

technical field

The utility model relates to the epidermis of sports balls, in particular to the sewn epidermis of footballs, handballs, volleyballs or similar sports balls.

Background technique

In the prior art, sports balls generally comprise a skin layer, a middle layer and an inner bladder. Wherein, the skin layer is generally made of natural leather or artificial leather (such as polyurethane PU or polyvinyl chloride PVC).

The epidermis is usually spliced by a plurality of combined sheets of predetermined shape. For example, the Chinese patent named "luminous ball for sports ball" with the publication number CN1917923A and the U.S. patent named "Sportsball and Manufacturing Method Thereof" with the patent No. US5772545. Wherein said sports ball is that 12 pieces of regular pentagonal combined pieces and 20 pieces of regular hexagonal combined pieces are sewn together with thread at the edges. And the U.S. Patent No. US5772545 named "Sportsball and Manufacturing Method Thereof" also pointed out that for volleyball, a standard volleyball is made of 18 rectangular composite sheets stitched together at the edges with threads.

It is well known that the sports balls made by the above method are basically polyhedrons because the epidermis is spliced by polygons, which means that they are not exactly spherical, which seriously affects the roundness of the sports balls and affects the shape of the sports balls. The trajectory and performance of sports, such as poor touch, poor ball control and other problems; To a certain extent, it affects the service life of the sports ball.

Utility model content

The utility model relates to the epidermis of sports balls, in particular to the sewn epidermis of footballs, handballs, volleyballs or similar sports balls. The technical problem to be solved is to provide a skin layer of a sports ball, the shape of the skin layer has better roundness and is closer to an ideal sphere.

In order to solve the above-mentioned technical problems, the utility model provides a skin layer of a sports ball, which is assembled into a spherical shape by combining multiple polygonal composite pieces, and there are holes for the air nozzle to pass through on the skin layer, which is characterized in that: each of the Each side of the polygonal composite sheet is a convex arc side.

According to a further feature of the present utility model, the polygonal combination pieces are 12 pieces of regular pentagons and 20 pieces of regular hexagons. The radius of curvature of the convex arc sides of the pentagonal composite sheet is between 180 and 186 mm, and the curvature radius of the convex arc sides of the hexagonal composite sheet is between 175 and 180 mm. The radius of curvature of the convex arc side of each regular pentagonal composite sheet is 184.8mm, and the distance between two adjacent vertices is 47mm; the radius of curvature of the convex curved side of each regular hexagonal composite sheet is 177.09mm. The distance between the two vertices is 46mm. The polygonal composite sheets are spliced together by sewing two corresponding sides at a certain distance inward parallel to their outward convex arc sides. Said distance is 3.2 to 3.5 mm. The combination sheet can be spliced into a spherical shape by hand sewing, machine sewing and other methods. The material of the skin layer can be artificial leather or natural leather.

The sports ball manufactured by the ball cover provided by the utility model has good true sphericity, is closer to an ideal sphere, has good hand feeling and good sphericity.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is an exploded schematic diagram of the composite sheet in the skin layer of the football improved according to the present invention.

Figure 2 is a schematic diagram of a regular pentagonal composite sheet in the present invention.

Figure 3 is a schematic diagram of a regular hexagonal composite sheet in the present invention.

Detailed ways

Referring to Fig. 1, one embodiment of the present invention is an improved traditional football epidermis. The epidermis is spliced by a plurality of suitable polygonal composite sheets with convex arc edges. More specifically, it is composed of 32 composite sheets, of which 12 are regular pentagonal composite sheets and 20 are regular hexagonal composite sheets. Shaped combination piece. As shown in Figure 2, the radius of curvature R' of the convex arc edge of the pentagonal composite sheet is between 180 and 186mm, as shown in Figure 3, the curvature of the convex arc edge of the hexagonal composite sheet Radius R " is between 175 to 180mm. In a preferred embodiment, as shown in Figure 2, the radius of curvature R' of the outer convex arc edge of the regular pentagon composite sheet with arc edge is about 184.8mm, positive The distance a' between adjacent vertices of the pentagon is about 47mm, from which it can be calculated that the distance D' between the two vertices of the regular pentagon is 76.04mm, and the circumcircle radius r' of the regular pentagon is 39.98mm. Shape vertex is about 73.82mm to relative arc edge tangent line distance L '.As shown in Figure 3, in this specific embodiment, the radius of curvature R " of the protruding arc edge of the regular hexagon combination sheet of arc edge is arranged It is about 177.09mm, and the distance a" between the adjacent vertices of the regular hexagon is 46mm. From this, it can be calculated that the distance D" between the two vertices of the regular hexagon is 92mm, and the radius r" of the circumscribed circle of the regular hexagon is 46mm. The tangent distance L" of the shape relative to the arc edge is 82.67mm.

As shown in Fig. 1, the hole 8 for passing the air nozzle is provided on one composite sheet. The polygonal composite sheets 10 and 20 are sewed at two corresponding sides 2 ' and 2 " at a certain distance d (referring to Figs. ' and 1" are sewn together, thereby splicing adjacent combination sheets 10 and 20 together. The 32 combination sheets adopt the general combination of sports balls such as footballs. Five regular hexagonal combination sheets are spliced around each regular pentagonal combination sheet, and each regular hexagonal combination sheet is surrounded by alternating three pieces. The regular pentagonal composite sheet and three regular hexagonal composite sheets are spliced together, and are finally spliced into a sphere. In a specific embodiment, said distance d is about 3.2 to 3.5 millimeters. The combination sheet can be spliced into a spherical shape by hand sewing, machine sewing and other methods. The material of the skin layer can be artificial leather or natural leather, so that the sewn sports ball is more round, has better hand feeling, and has better sports performance and service life.

In another embodiment, the skin layer of the sports ball can also be a plurality of polygons with arc-shaped sides such as triangles and quadrilaterals and their combinations spliced in the above-mentioned manner.

The skin layer of the sports ball can be made of artificial leather (such as polyurethane PU or polyvinyl chloride PVC, etc.) or other materials suitable for making the skin layer of the sports ball.

Those skilled in the art can also conceive of splicing the individual composite sheets together by bonding or other means using an adhesive.

Those skilled in the art can easily imagine that the specific dimensions mentioned above can be enlarged or reduced as a whole. For example, those skilled in the art can change the radian of the arc side to achieve the effect of the present invention.

Although the utility model has been described with reference to the specific embodiments above, the utility model is not limited to the above-mentioned embodiments, and any sports ball skin layer spliced by polygonal composite sheets with convex arc edges is included in the utility model. within the scope of protection. Based on the design structure disclosed in this specification, without departing from the scope of the claims, any improvement to the shape, size, selection of materials, combination of combined pieces or other insubstantial improvements shall not be deemed to affect its essence. improvement of. The scope of protection of the utility model shall be determined by the appended claims.

Claims (9)

1. a kind of epidermis of sports ball, is spliced into spherical shape by the combination of many polygonal combination sheets, on the epidermis there is the hole that is used for air nozzle to pass through, it is characterized in that: each limit of each described polygonal combination sheet is outward convex curved edges. 2 . The skin layer of a sports ball according to claim 1 , characterized in that: the polygonal composite pieces are 12 pieces of regular pentagons and 20 pieces of regular hexagons. 3. The skin layer of a sports ball according to claim 2, characterized in that: the radius of curvature of the convex arc-shaped side of the regular pentagonal combined piece is between 180 and 186 mm, and the regular hexagonal combined piece The radius of curvature of the convex arc edge is between 175 and 180mm. 4. The epidermis of a sports ball according to claim 3, characterized in that: the radius of curvature of the convex arc side of each regular pentagonal composite sheet is 184.8mm; the convex arc of each regular hexagonal composite sheet The edge curvature radius is 177.09mm. 5. The skin layer of a sports ball according to claim 2, characterized in that: the distance between two adjacent vertices of the regular pentagonal composite sheet is 47 mm; the distance between two adjacent vertices of the regular hexagon is 46 mm. 6. The skin layer of a sports ball according to any one of claims 1 to 5, characterized in that: the polygonal composite pieces correspond to each other at a certain distance inward from the convex arc sides parallel to them The edges are sewn while stitching together. 7. The sports ball skin layer according to claim 6, wherein said distance is 3.2 to 3.5 mm. 8. The skin layer of a sports ball according to claim 1, characterized in that: the material of the skin layer can be artificial leather or natural leather. 9. The skin layer of a sports ball according to claim 2, characterized in that: five pieces of the regular hexagonal combination piece are spliced around the regular pentagonal combination piece, and the surroundings of the regular hexagonal combination piece It is spliced together with three alternating regular pentagonal composite sheets and three regular hexagonal composite sheets.

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