WO2009074012A1

WO2009074012A1 - Skin layer of a sports ball

Info

Publication number: WO2009074012A1
Application number: PCT/CN2008/001943
Authority: WO
Inventors: Yung Pun Cheng
Original assignee: Yung Pun Cheng
Priority date: 2007-12-07
Filing date: 2008-11-28
Publication date: 2009-06-18
Also published as: CN201211416Y

Abstract

A skin layer of a sports ball is made of plurality of polygon pieces (10, 20) forming spherical shape, a hole (8) for insertion of an air valve is provided in the skin layer, wherein each edge of each polygon piece (10, 20) is a convex arcual edge.

Description

The skin of the sports ball

Technical field

The present invention relates to a skin layer of a sports ball, particularly a sewn skin layer of a soccer ball, a handball, a volleyball or the like.

Background technique

In the prior art, a sports ball typically comprises a skin layer, an intermediate layer and a bladder. Among them, the skin layer is generally made of natural leather or artificial leather such as polyurethane PU or polyvinyl chloride FVC.

The skin layer is generally formed by splicing a plurality of pieces of a predetermined shape. For example, the Chinese patent entitled "Glowing Ball Sports Ball" and the US Patent No. 5,772,245 entitled "Sportsball and Manufacturing Method Thereof" are disclosed in US Patent No. CN1917923A. Wherein the sports ball is 12 pieces of regular pentagon combined pieces and 20 pieces of regular hexagonal combined pieces are stitched together at the edges. U.S. Patent No. 5,772,245 entitled "Sportsball and Manufacturing Method Thereof^ also states that for volleyball, the standard volleyball is stitched together at the edges by 18 rectangular panels.

It is well known that the sports balls produced by the above method are basically polyhedrons because the skin layers are spliced by polygons, that is, they are not precise spherical shapes, which seriously affect the roundness of the sports balls and affect the sports balls. The trajectory and athletic performance, such as poor touch and poor ball control; on the other hand, the curvature of the epidermis is uneven, which will cause the ball to be unbalanced when supporting pressure and resisting impact pressure. The extent to which the life of the sports ball is affected.

Summary of the invention

The invention relates to the skin layer of a sports ball, in particular soccer, handball, volleyball or the like The sewn skin layer of the ball is used. The technical problem to be solved is to provide a skin layer of a sports ball whose shape has a better roundness and is closer to an ideal sphere.

In order to solve the above technical problem, the present invention provides a skin layer of a sports ball which is spliced into a spherical shape by a plurality of polygonal combination sheets, and a hole for passing a gas nozzle on the skin layer, wherein: each of the polygons Each side of the composite sheet is a convex curved side.

According to a further feature of the invention, the polygonal composite sheet is 12 regular pentagons and 20 regular hexagons. The pentagon composite sheet has a convex curved edge having a radius of curvature of between 180 and 186 mm, and the hexagonal combined piece has a convex curved edge having a radius of curvature between 175 and 180 awake. Each radius of curvature of a convex curved edge of the sheet is a combination of a regular pentagon 184. 8mm, 47mm distance between two adjacent vertices _of; convex radius of curvature of the arcuate edge of each sheet is a combination of regular hexagonal 177. 09mm, The distance between two adjacent vertices is 46 mm. The polygonal composite sheets are stitched together by stitching the two corresponding edges at a certain distance parallel to their convex arc edges. 5毫米。 The distance is 3.2 to 3. 5 mm. The composite sheet can be spliced into a spherical shape by hand sewing, machine sewing, or the like. The material of the skin layer may be artificial leather or natural leather.

The sports ball made by the ball skin provided by the present invention has a good sphericity, is closer to the ideal sphere, has a good feel and a good spherical shape.

DRAWINGS

The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of a composite sheet in a skin layer of a soccer ball improved in accordance with the present invention.

Fig. 2 is a schematic view showing a regular pentagon composite sheet of the present invention. Fig. 3 is a schematic view showing a regular hexagonal composite sheet of the present invention.

DETAILED DESCRIPTION OF THE INVENTION Referring to Figure 1, an embodiment of the present invention is an improved conventional soccer skin layer. The skin layer is formed by splicing a plurality of suitable polygonal combination pieces having convex curved edges, more specifically The description is composed of 32 combined sheets, 12 of which are regular pentagon combined sheets and 20 of which are regular hexagonal combined sheets. As shown in FIG. 2, the convex curved edge radius R' of the pentagonal combined piece is between 180 and 186 ram, as shown in FIG. 3, the convex curved edge curvature of the hexagonal combined piece The radius R" is between 175 and 180. In a preferred embodiment, as shown in Fig. 2, the radius of curvature of the convex curved side of the regular pentagon combination having a curved edge is about 184. The distance between the adjacent vertices of the regular pentagon is about 47 mm, and the distance between the two vertices of the regular pentagon is calculated to be 76. 01⁄2m, the radius of the circumcircle of the regular pentagon is 39. 98mm, the positive five sides The tangential distance from the apex to the opposite curved edge is about 73. 82. As shown in Fig. 3, in this embodiment, the radius of curvature of the convex curved edge of the regular hexagonal combined piece having the curved edge R "About 177. 09mm, the distance a" between adjacent vertices of the regular hexagon is 46mm, from which it can be calculated that the distance D" between the regular hexagons and the two vertices is 92mm, and the radius rt of the circumscribed circle of the regular hexagon is 46imi. The tangential distance L" of the regular hexagon with respect to the curved edge is 82. 67 legs. As shown in Fig. 1, a hole 8 for passing through the nozzle is provided on a piece of the composite sheet. The polygonal composite sheets 10 and 20 are stitched by a pair of corresponding sides 2, and 2" at a certain distance d (see Figs. 2 and 3) inwardly parallel to their convex curved edges, and the corresponding curved edges 1 ' and 1' are sewn together to splicing adjacent panels 10 and 20 together. The 32-piece combination piece adopts a combination of general sports balls such as soccer balls, and each of the regular pentagon-shaped combination pieces is spliced with five pieces of regular hexagonal combination pieces, and each piece of regular hexagonal combination pieces is surrounded by three pieces of alternating hexagonal pieces. The regular pentagon combination piece and the three regular hexagonal combination pieces are spliced together and finally spliced into a sphere. 5毫米。 In a specific embodiment, the distance d is about 3.2 to 3. 5 mm. The composite sheet can be spliced into a spherical shape by hand sewing, machine sewing, or the like. The material of the skin layer may be artificial leather or natural leather, so that the sewed sports ball is more round, has a better hand feeling, and has better sports performance and service life. In another embodiment, the skin layer of the sports ball may also be a plurality of polygons having a curved side such as a triangle, a quadrangle, and the like, and a combination therebetween is spliced in the above 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 a sports ball. It is also contemplated by those skilled in the art that the individual panels are spliced together by other means such as bonding using an adhesive. It will be readily apparent to those skilled in the art that the specific dimensions mentioned above may be enlarged or reduced as a whole. For example, those skilled in the art can change the curvature of the curved sides to achieve the effects of the present invention.

Although the present invention has been described with reference to the above specific embodiments, the present invention is not limited to the above embodiments, and any sports ball skin layer formed by splicing a polygonal combination piece having convex curved sides is within the scope of the present invention. . Based on the design structure disclosed in this specification, the shape, size, material selection, combination of combinations or other insubstantial improvements shall not be considered as affecting the substance without departing from the scope of the claims. improvement of. The scope of the invention is defined by the appended claims.

Claims

Claim

A skin layer of a sports ball, which is spliced into a spherical shape by a plurality of polygonal composite sheets, and has a hole for passing a gas nozzle on the skin layer, wherein: each side of the polygonal composite sheet is convex Curved edge.

2. The skin layer of a sports ball according to claim 1, wherein: said polygonal combination sheet is 12 regular pentagons and 20 regular hexagons.

3. The skin layer of the sports ball according to claim 2, wherein: the convex curved side of the regular pentagon combined sheet has a radius of curvature of between 180 and 186 mm, and the regular hexagonal combined piece The convex curved edge has a radius of curvature between 175 and 180 dishes.

The slanting edge of each of the regular pentagons has a radius of curvature of 184. 8 mm; the convexity of each of the regular hexagonal composite sheets is as follows: The radius of curvature of the curved side is 177. 09 mm.

5. The skin layer of a sports ball according to claim 2, wherein: the distance between two adjacent vertices of the regular pentagon is 47 匪; and the distance between adjacent vertices of the regular hexagon is 46 legs.

The skin layer of a sports ball according to any one of claims 1 to 5, wherein: the polygonal composite sheet corresponds to each other at a certain distance inward by an arcuate edge parallel to them The edges are stitched together and stitched together.

5毫米。 The distance of 3. 2 to 3. 5 mm.

8. The skin layer of a sports ball according to claim 1, wherein the material of the skin layer is artificial leather or natural leather.

9. The skin layer of a sports ball according to claim 2, wherein: said regular hexagonal composite sheet is spliced around said regular pentagon composite sheet, and said regular hexagonal composite sheet is surrounded. Three pieces of the alternating regular pentagonal combined piece and three pieces of the regular hexagonal combined piece are spliced together.