Football and training assembly

Abstract

The invention provides a football and training assembly. The football comprises a ball body and an identification area arranged on the surface of the ball body. And the identification area comprises a ball outlet guide line, a ball placing line and a ball hitting point group which are respectively arranged on the surface of the ball body. The ball outlet guide line and the ball placing line are located on different sections. And each section passes through the center of the sphere. The ball hitting point set comprises a plurality of ball hitting datum points distributed at intervals. The section where the distribution path of the ball hitting datum points is located coincides with the section where the ball outlet guide line is located. The horizontal midline section is defined as a section passing through the center of the sphere. When the section where the ball outlet guide line is located and the section where the ball placing line is located are both perpendicular to the ground, the section of the horizontal center line is parallel to the ground, and the ball hitting datum points are distributed downwards from the section of the horizontal center line. According to the football and training assembly provided by the invention, the training efficiency and the training effect of the place kick can be improved.

Description

Technical Field

[0001] This application relates to the technical field of sports equipment, and more particularly, to a football and a training component. Background Art

[0002] In football, set pieces are a high-level and important skill, including free kicks, penalty kicks, corner kicks, goal kicks, etc. People need to form movement habits and muscle memories through a large number of action attempts and practices to master set pieces. However, in the related art, there is a lack of training equipment for training set pieces to accurately and efficiently guide various elements such as angles and distances objectively required in the movement. It is difficult for people to keep the above elements correct and stable during training to accurately test the movement and conduct correct repeated training, resulting in low training efficiency and poor training effect. Summary of the Invention

[0003] In view of this, this application provides a football, a training component and a training device to improve the training efficiency and training effect of set pieces.

[0004] An embodiment of this application provides a football. The football has a spherical body and a marking area provided on the surface of the spherical body. The marking area includes a ball release guiding line, a ball placement line and a hitting point group respectively arranged on the surface of the spherical body. The ball release guiding line and the ball placement line are located in different cross-sections. Each cross-section is a cross-section passing through the center of the spherical body. The hitting point group includes a plurality of hitting reference points distributed at intervals. The cross-section where the distribution path of the plurality of hitting reference points is located coincides with the cross-section where the ball release guiding line is located. The horizontal median cross-section is defined as the cross-section passing through the center of the spherical body. When the cross-section where the ball release guiding line is located and the cross-section where the ball placement line are both perpendicular to the ground, the horizontal median cross-section is parallel to the ground, and the plurality of hitting reference points are distributed downward from the horizontal median cross-section.

[0005] In the above embodiments, the ball - guiding line, the ball - placing line, the distribution path of the hitting reference points, etc. are circumferential lines formed by the intersection of the cross - section passing through the center of the sphere and the spherical surface of the sphere. After the user rotates relative to the sphere, these lines in the visually marked area can overlap and present as a certain straight line. According to the angular relationship between the ball - guiding line and the ball - placing line relative to the ground, after the user rotates the sphere in place, when the cross - section where the ball - guiding line is located is perpendicular to the ground, the ball - guiding line visually presents as "perpendicular" to the ground for the user; when the cross - section where the ball - placing line is located is perpendicular to the ground, the ball - placing line visually presents as "perpendicular" to the ground for the user. And when the user faces the ball - guiding line "perpendicular" to the ground, the ball - guiding line can visually present as "a straight line" and can be used to indicate the direction. Therefore, by placing the sphere so that the cross - sections where the ball - guiding line and the ball - placing line are located are respectively perpendicular to the ground, and when the ball - guiding line is aligned with the preset target direction, the position of the marked area on the sphere relative to the ground can be positioned, thus completing "correct ball - placing", improving the ball - placing efficiency, and then improving the training efficiency. Multiple hitting reference points are all located in the cross - section where the ball - guiding line is located. By aligning the "straight line" presented by the ball - guiding line with the direction of the preset target, it can be used to guide the flying direction of the sphere when the user hits the ball through the hitting reference points. After correct ball - placing, the hitting reference points are distributed downward from the horizontal mid - line cross - section. When the user kicks the ball at the positions indicated by each hitting reference point and makes the sphere fly out along the direction indicated by the ball - guiding line, the farther away from the horizontal mid - line cross - section, that is, the lower the hitting reference point, the higher the flying angle of the sphere. Therefore, according to the required angle corresponding to the height of the ball to be practiced, the user can kick the ball at the corresponding hitting reference point for practice. When the user uses the football of the present application for free - kick training, the ball can be quickly placed correctly and quickly aimed at the hitting target through the ball - guiding line and the ball - placing line, thus quickly completing "correct ball - placing", making the positions of each hitting reference point relative to the ground, relative to the sphere, and relative to the preset hitting target correctly fixed. At this time, after correct running - up and hitting, the flying direction and trajectory of the sphere will also be the same and fixed. The user can judge whether the hitting contact point on the sphere that he hopes to hit is accurately and effectively hit under his full set of hitting actions according to the ball - leaving effect after his hitting, so as to further improve and finalize each element in the action, such as the running - up angle and route, the landing of the supporting foot, the hitting posture, the follow - through action, etc. After being familiar with the effective action, the user can form an action habit and muscle memory, so that when using a football without a marked area to kick the ball, the user can also apply the above - mastered action details to stably hit the specific hitting effect during training. Therefore, using the football with the above - mentioned marked area for practice can improve the training efficiency and effect of free - kicks.

[0006] In some embodiments of the present application, the central axis is defined as the intersection line of the cross-section where the ball release guiding line is located and the cross-section where the pendulum ball line is located. The marking area further includes a running-up guiding mark. The running-up guiding mark includes a plurality of running-up corner points. The included angles between different running-up corner points and the cross-section where the central axis is located and the cross-section where the ball release guiding line is located are different.

[0007] In the above embodiments, when the user kicks a stationary ball and runs up from different directions relative to the football, it will affect elements such as the acting force direction of the kicking foot when the user kicks the ball. Each included angle formed by the cross-section where the running-up corner point and the central axis are located and the cross-section where the ball release guiding line is located can be used to indicate the running-up angle of the user. After "correctly placing the ball", when the user stands at the exact side of the cross-section where the running-up corner point and the central axis are located, and when the ball release guiding line visually appears as "a straight line", it can be used to indicate the running-up included angle of the user relative to the ball release direction, so as to facilitate the user to repeatedly practice different running-up directions, improving the training efficiency and training effect.

[0008] In some embodiments of the present application, the running-up guiding mark further includes a plurality of running-up guiding lines. Each running-up corner point is provided on a running-up guiding line. When the cross-section where the ball release guiding line is located and the cross-section where the pendulum ball line is located are both perpendicular to the ground, the cross-section where each running-up guiding line is located is perpendicular to the ground.

[0009] In the above embodiments, the cross-section where the running-up guiding line is located is the cross-section where the running-up corner point and the central axis are located. After "correctly placing the ball", when the user stands at the exact side of the "cross-section where the running-up guiding line is located" corresponding to the running-up angle to be practiced, the running-up guiding line will visually appear as "a straight line" to indicate the direction, improving the user's recognition of the running-up direction, which is beneficial to improving the training efficiency and training effect of the user's running-up direction practice.

[0010] In some embodiments of the present application, the marking area further includes a penalty kick guiding mark. The penalty kick guiding mark includes a first penalty kick corner point, a second penalty kick corner point, a third penalty kick corner point, and a fourth penalty kick corner point, which are respectively used to indicate the four corners of the goal when the user takes a penalty kick.

[0011] In the above embodiments, the stationary ball includes a penalty kick kicked at the penalty kick spot in front of the goal. The relative positions of the first penalty kick corner point, the second penalty kick corner point, the third penalty kick corner point, and the fourth penalty kick corner point relative to the center of the ball can respectively correspond to the four corners of the goal, so that the user can repeatedly practice the action of kicking the ball towards the corner of the goal during the penalty kick, improving the training efficiency and training effect.

[0012] In some embodiments of the present application, the area formed by sequentially connecting the first penalty kick corner point, the second penalty kick corner point, the fourth penalty kick corner point, and the third penalty kick corner point is the range indicating the hitting point within the goal range when the user takes a penalty kick.

[0013] In the above embodiments, after connecting the corner points of the first ball, the corner points of the second ball, the corner points of the fourth ball, and the corner points of the third ball, the area within the four points corresponds to the range of the goal, so that the user can repeatedly practice the action of kicking the ball towards the position within the goal range when taking a penalty kick, improving the training efficiency and training effect.

[0014] In some embodiments of the present application, the hitting point group further includes a first side spin point. In the direction perpendicular to the cross-section where the ball exit guiding line is located, the first side spin point is spaced apart from one of the multiple hitting reference points.

[0015] In the above embodiments, when the user takes a stationary ball kick, by applying a force passing through the side of the ball center at the side of the target hitting position, a side spin ball is kicked. After "correctly placing the ball", regarding the horizontal center line cross-section as the "equator" position of the sphere, the first side spin point and the corresponding hitting reference point are located at similar "latitude" positions. Then, after "correctly placing the ball", the first side spin point is located at the side of the corresponding hitting reference point. When the user kicks the ball towards the first side spin point, a side spin ball with the same ball exit direction as the corresponding hitting reference point can be kicked, so that the user can repeatedly practice the side spin ball, improving the training efficiency and training effect.

[0016] In some embodiments of the present application, the hitting point group further includes a top spin point. The top spin point is spaced apart from the hitting reference point. The top spin point is located in the cross-section where the multiple hitting reference points are located. When the cross-section where the ball exit guiding line is located and the cross-section where the ball placing line is located are both perpendicular to the ground, the top spin point is located below one of the multiple hitting reference points.

[0017] In the above embodiments, when the user takes a stationary ball kick, by applying a force passing through the upper side of the ball center below the hitting position at the target height, a top spin ball is kicked. After "correctly placing the ball", the top spin point is located below the corresponding hitting reference point. When the user kicks the ball towards the top spin point, a top spin ball with the same ball exit direction as the corresponding hitting reference point can be kicked, so that the user can repeatedly practice the top spin ball, improving the training efficiency and training effect.

[0018] In some embodiments of the present application, the hitting point group further includes a second side spin point. In the direction perpendicular to the cross-section where the ball exit guiding line is located, the second side spin point is spaced apart from the top spin point.

[0019] In the above embodiments, when the user takes a stationary ball kick, by applying a force passing through the side of the ball center at the side of the target hitting position, a side spin ball is kicked. After "correctly placing the ball", regarding the horizontal center line cross-section as the "equator" position of the sphere, the second side spin point and the corresponding top spin point are located at similar "latitude" positions. Then, after "correctly placing the ball", the second side spin point is located at the side of the corresponding top spin point. When the user kicks the ball towards the second side spin point, a side top spin ball corresponding to the top spin point can be kicked, so that the user can repeatedly practice the side spin ball, improving the training efficiency and training effect.

[0020] In some embodiments of the present application, the identification area further includes a painting guide mark. The painting guide mark includes a hitting assist line and a painting hitting base point. When the cross-section where the ball exit guide line is located and the cross-section where the ball placement line is located are both perpendicular to the ground, the cross-section where the hitting assist line is located is perpendicular to the ground. The painting hitting base point is located at the intersection of the hitting assist line and the cross-section of the horizontal center line.

[0021] In the above embodiments, after "correct ball placement", the cross-section where the hitting assist line is located is also perpendicular to the ground, and the hitting assist line can also present as "a straight line" in the user's vision to guide the set target hitting direction. By using the hitting assist line and the intersection position of the hitting assist line and the cross-section of the horizontal center line, that is, the painting hitting base point as a reference, the user can draw points or lines by himself in the nearby area as needed as new hitting points to study and measure new hitting effects.

[0022] In some embodiments of the present application, the central axis is defined as the intersection line of the cross-section where the ball exit guide line is located and the cross-section where the ball placement line is located. The identification area further includes a first ball placement point and a second ball placement point. The first ball placement point and the second ball placement point are respectively located at both ends of the central axis.

[0023] In the above embodiments, after "correct ball placement", one of the first ball placement point and the second ball placement point should be located at the top of the sphere, and the other should be located at the bottom of the sphere. The user can use the positions of the first ball placement point and the second ball placement point relative to the ground to assist in adjusting the placement posture of the sphere, thereby improving the accuracy and efficiency of the sphere placement, which is beneficial to improving the training efficiency.

[0024] In some embodiments of the present application, the identification area is sprayed onto the sphere with paint or attached to the sphere with a sticker or printed on the sphere.

[0025] In the above embodiments, the methods of paint spraying, sticker pasting, and printing can improve the speed and accuracy of setting the identification area on the sphere, and improve the production efficiency of the football.

[0026] An embodiment of the present application provides a training component. The training component includes a support foot marker and a football as described in any of the above embodiments. The support foot marker includes a horizontal positioning section, a first marking part, and a second marking part. The horizontal positioning section is perpendicular to the cross-section where the ball exit guide line is located during use. The second marking part is located at the end of the horizontal positioning section. The first marking part is provided on the horizontal positioning section and can move freely on the horizontal positioning section to adjust the distance between the first marking part and the second marking part, for guiding the preset landing point of the user's support foot on the ground, and constituting the positional relationship between the support foot and the football.

[0027] In the above embodiments, first, the support foot marker is placed at an approximate position beside the ground penalty spot, with the horizontal positioning section perpendicular to the ball release line and maintained thereafter. After "correctly placing the ball", by translating the football left or right, the distance between the cross-section where the ball release guiding line is located and the second marking part is set to the length of the sphere radius and maintained thereafter. Then, by sliding the first marking part on the horizontal positioning section, the horizontal distance between the first marking part and the cross-section where the ball release guiding line is located and the second marking part is adjusted. Finally, by translating the football forward or backward in the cross-section where the ball release guiding line is located, the position of the horizontal positioning section relative to the orthographic projection of the hitting point group on the ground is determined, thereby adjusting the positional relationship between the support foot landing point and the actual hitting point, and giving the user a guide for the "correct standing position" of the support foot, facilitating the user to repeatedly practice the support foot standing position and improving the training effect.

[0028] In some embodiments of the present application, the support foot marker further includes a length reference section. The length reference section is connected to the horizontal positioning section and is connected at the position of the second marking part. The length of the length reference section is used as a dimension reference when adjusting the distance between the first marking part and the second marking part.

[0029] In the above embodiments, by bending the length reference section to be parallel and overlapping with the horizontal positioning section and sliding the first marking part by referring to the length of the length reference section to adjust its position, the position of the first marking part relative to the second marking part or the actual hitting point can be quickly adjusted, which is conducive to improving the training efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope.

[0031] Figure 1 Front view schematic diagram of a football provided in an embodiment of the present application;

[0032] Figure 2 For Figure 1 Top view schematic diagram of the football in

[0033] Figure 3 For Figure 1 Another form of front view schematic diagram of the football in

[0034] Figure 4 For Figure 1 Rear view schematic diagram of the football in

[0035] Figure 5 For Figure 1 Reference schematic diagram of the flight direction of the football in

[0036] Figure 6Schematic diagram of the cooperation between the training component and the user provided by an embodiment of the present application.

[0037] Description of main component symbols:

[0038] Football 100

[0039] Sphere 1

[0040] Identification area 2

[0041] Ball release guiding line 21

[0042] Ball placement line 22

[0043] Horizontal midline section 231

[0044] Central axis 232

[0045] Striking point group 24

[0046] Striking reference points 241, 241a, 241b, 241c

[0047] Topspin point 242

[0048] First side spin point 243

[0049] Second side spin point 244

[0050] Approach guiding mark 25

[0051] Approach corner points 251, 251a, 251b

[0052] Approach route 251A

[0053] Approach guiding line 252

[0054] Penalty kick guiding mark 26

[0055] First penalty kick corner point 261

[0056] Second penalty kick corner point 262

[0057] Third penalty kick corner point 263

[0058] Fourth penalty kick corner point 264

[0059] First dummy goal line 265

[0060] Second dummy goal line 266

[0061] Third dummy goal line 267

[0062] Fourth dummy goal line 268

[0063] Assistant drawing guiding mark 27

[0064] Striking assistance marking line 271

[0065] Base point assistance marking for striking 272

[0066] First ball placement point 281

[0067] Second ball placement point 282

[0068] Training component 200

[0069] Support foot marker 210

[0070] Length reference segment 2101

[0071] Lateral positioning segment 2102

[0072] First marking part 2103

[0073] Second marking part 2104

[0074] User 1000

[0075] Ball - striking foot 1001

[0076] Support foot 1002 Detailed implementation manners

[0077] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementation manners, and are not intended to limit this application.

[0079] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0080] The term "and / or" includes any and all combinations of one or more of the related listed items.

[0081] The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0082] In addition, the symbol "-" should be understood to include its endpoint values.

[0083] Embodiments of the present application provide a football, a training component and a training device. The football has a spherical body and an identification area provided on the surface of the spherical body. The identification area includes a ball-out guiding line, a ball-placement line and a hitting point group, which are respectively arranged on the surface of the spherical body. The ball-out guiding line and the ball-placement line are located in different cross-sections. Each cross-section is a cross-section passing through the center of the spherical body. The hitting point group includes a plurality of hitting reference points distributed at intervals. The cross-section where the distribution path of the plurality of hitting reference points is located coincides with the cross-section where the ball-out guiding line is located. The horizontal median cross-section is defined as the cross-section passing through the center of the spherical body. When the cross-section where the ball-out guiding line is located and the cross-section where the ball-placement line are both perpendicular to the ground, the horizontal median cross-section is parallel to the ground, and the plurality of hitting reference points are distributed downward from the horizontal median cross-section.

[0084] All points on the spherical surface are calculated and located by tools such as "spherical coordinate system", "latitude and longitude coordinate system", and "arc length".

[0085] The ball - throwing guiding line, the ball - placing line, the approach - running guiding line, and the distribution path of the hitting reference points, etc., are circular lines formed by the intersection of the cross - section passing through the center of the ball and the spherical surface of the ball. After the user rotates relative to the ball and stands directly to the side of these cross - sections (that is, one eye is in front of the cross - section and the other eye is behind the cross - section, and the nose passes through the cross - section), the lines of the relevant cross - sections within the visual marking area can overlap and appear as a certain straight line visually. According to the angular relationship between the ball - throwing guiding line and the ball - placing line relative to the ground, after the user rotates the ball in place, when the cross - section where the ball - throwing guiding line is located is perpendicular to the ground, the ball - throwing guiding line appears "perpendicular" to the ground visually for the user; when the cross - section where the ball - placing line is located is perpendicular to the ground, the ball - placing line appears "perpendicular" to the ground visually for the user. And when the user stands directly to the side of the cross - section where the ball - throwing guiding line that is "perpendicular" to the ground is located, the ball - throwing guiding line can appear as "a straight line" visually and can be used to indicate the direction. Therefore, by placing the ball so that the cross - sections where the ball - throwing guiding line and the ball - placing line are located are respectively perpendicular to the ground, and when the ball - throwing guiding line is aligned with the preset target direction, the positions of the marking area on the ball relative to the ground and the ball - throwing target can be positioned, thereby completing "correct ball - placing", improving the ball - placing efficiency, and thus improving the training efficiency. Multiple hitting reference points are all located in the cross - section where the ball - throwing guiding line is located. By aligning the "straight line" presented by the ball - throwing guiding line with the direction of the preset target, it can be used to guide the flying direction of the ball when the user hits the ball through the hitting reference points. After correct ball - placing, the hitting reference points are distributed downward from the horizontal mid - line cross - section. When the user kicks the ball at the positions indicated by each hitting reference point and makes the ball fly out along the direction indicated by the ball - throwing guiding line, the farther away from the horizontal mid - line cross - section, that is, the lower the hitting reference point, the higher the flying angle of the ball. Thus, according to the required angle corresponding to the height of the ball to be practiced, the user can kick the ball at the corresponding hitting reference point for practice. When the user uses the football of the present application for set - piece training, the ball can be quickly placed correctly and quickly aimed at the hitting target through the ball - throwing guiding line and the ball - placing line, thereby quickly completing "correct ball - placing", making the positions of each hitting reference point relative to the ground, relative to the ball, and relative to the preset hitting target correctly fixed. At this time, after correct approach - running and hitting, the flying direction and trajectory of the ball will also be the same and fixed. The user can judge whether they accurately and effectively hit the designated hitting point on the desired ball under their full set of hitting actions according to the ball - throwing effect after their own hitting, so as to adjust and finalize each element in the action, such as the approach - running angle and route, the landing of the supporting foot, the hitting posture, the follow - through action, etc. After effectively testing and getting familiar with the action, action habits and muscle memory can be formed. Thus, when using a football without a marking area to kick the ball, the details and skills in the above - mastered actions can also be applied to stably hit the specific hitting effect during training. Therefore, using a football with the above - mentioned marking area for practice can improve the training efficiency and hitting effect of set - pieces.

[0086] Mathematically defined: A geometric solid formed by rotating a semi - circle around the straight line where its diameter lies for one full revolution is called a sphere. A sphere is a three - dimensional figure with a continuous curved surface, and a geometric solid enclosed by a spherical surface is called a sphere. The football in this application belongs to the sphere described in this definition.

[0087] The following will describe in detail some embodiments of this application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0088] See Figure 1 , an embodiment of this application provides a football 100 for a user 1000 (as shown in combination Figure 6 ) to use when training free kicks. The user 1000 controls the flight trajectory of the sphere 1 when kicking a free kick by using the football 100 of this application. In some embodiments, the sphere 1 includes an inner bladder (not shown in the figure) and an outer skin that wraps the inner bladder. Both the outer skin and the inner bladder are spherical and have the same center of the sphere.

[0089] See Figure 1 and Figure 2 , in some embodiments, the football 100 has a sphere 1 and an identification area 2 provided on the surface of the sphere 1. The identification area 2 includes a ball - kicking guiding line 21, a ball - placing line 22, and a hitting - point group 24 that are respectively arranged on the surface of the sphere 1. It can be understood that in some embodiments, the identification area 2 is provided on the surface of the outer skin.

[0090] The football 100 has a sphere 1 and an identification area 2 provided on the surface of the sphere 1. The identification area 2 includes a ball - kicking guiding line 21, a ball - placing line 22, and a hitting - point group 24 that are respectively arranged on the surface of the sphere 1.

[0091] The ball - kicking guiding line 21 and the ball - placing line 22 are located in different cross - sections. Each cross - section is a cross - section passing through the center of the sphere 1. The hitting - point group 24 includes a plurality of hitting reference points 241 distributed at intervals. The cross - section where the distribution path of the plurality of hitting reference points 241 lies coincides with the cross - section where the ball - kicking guiding line 21 is located. Define the horizontal median cross - section 231 as the cross - section passing through the center of the sphere 1. Define the central axis line 232 as the intersection line of the cross - section where the ball - kicking guiding line 21 is located and the cross - section where the ball - placing line 22 is located.

[0092] When the cross - section where the ball - kicking guiding line 21 is located and the cross - section where the ball - placing line 22 are both perpendicular to the ground, the horizontal median cross - section 231 is parallel to the ground, the central axis line 232 is perpendicular to the ground, and the plurality of hitting reference points 241 are distributed downward from the horizontal median cross - section 231.

[0093] The ball release guiding line 21, the ball placement line 22, the distribution path of the hitting reference points 241, etc. are all circular lines formed by the intersection of the cross-section passing through the center of the sphere 1 and the spherical surface of the sphere 1. After the user 1000 rotates relative to the sphere 1, these lines in the visual identification area 2 can overlap and appear as a certain straight line. According to the angular relationship between the ball release guiding line 21 and the ball placement line 22 relative to the ground, after the user 1000 rotates the sphere 1 in place to adjust the touchdown point of the sphere 1 on the ground, when the cross-section where the ball release guiding line 21 is located is perpendicular to the ground, the ball release guiding line 21 can appear as "perpendicular" to the ground in the vision of the user 1000; when the cross-section where the ball placement line 22 is located is perpendicular to the ground, the ball placement line 22 can appear as "perpendicular" to the ground in the vision of the user 1000. And when the user 1000 stands on the positive side of the cross-section where the ball release guiding line 21 is located, the ball release guiding line 21 can appear as "a straight line" in the vision of the user 1000 and can be used to indicate the direction. Multiple hitting reference points 241 are all located in the cross-section where the ball release guiding line 21 is located. By aligning the "straight line" presented by the ball release guiding line 21 with the direction of the preset target, it can be used to guide the flight direction of the sphere 1 when the user 1000 hits the ball through the hitting reference point 241.

[0094] Therefore, by placing the sphere 1 so that the cross-sections where the ball release guiding line 21 and the ball placement line 22 are located are both perpendicular to the ground, and when the ball release guiding line 21 is aligned with the preset target direction, the position of the identification area 2 on the sphere 1 relative to the ground can be located, thereby completing "correct ball placement", improving the ball placement efficiency, and thus improving the training efficiency. Therefore, the steps referred to by "correct ball placement" are: 1. Make the ball release guiding line 21 "perpendicular" to the ground; 2. Make the ball placement line 22 "perpendicular" to the ground; 3. Rotate the football in place and align the ball release guiding line 21 with the direction of the preset hitting target.

[0095] After correct ball placement, the hitting reference points 241 are distributed downward from the horizontal midline cross-section 231. When the user 1000 kicks the ball at the positions indicated by the hitting reference points 241, making the sphere 1 fly out along the direction indicated by the ball release guiding line 21, when kicking the ball at the hitting reference point 241 that is farther from the horizontal midline cross-section 231, that is, the lower the point, the higher the flying angle of the sphere 1 (the angle between the ball release line and the ground). Therefore, according to the required angle corresponding to the height of the ball release to be practiced, the user can kick the ball at the corresponding hitting reference point 241 for practice.

[0096] When user 1000 conducts free kick training by using the football 100 of the present application, the football can be quickly aligned and the hitting target can be quickly aimed at through the ball delivery guiding line 21 and the ball placing line 22, so as to quickly complete the "correct ball placing", making the positions of each hitting reference point 241 relative to the ground, relative to the sphere 1, and relative to the preset hitting target correctly fixed. At this time, after correct running-up and hitting, the flying direction and trajectory of the sphere 1 will also be the same and fixed. User 1000 can judge whether the hitting point on the desired sphere 1 is accurately and effectively hit under his own complete hitting action according to the ball delivery effect after his hitting, so as to further improve and finalize each element in the action, such as the running-up angle and route, the landing of the supporting foot 1002, the hitting posture, the follow-through action, etc. After getting familiar with the effective action, action habits and muscle memories can be formed, so that when using the football 100 without the identification area 2 to kick the ball, the above-mentioned action details and skills that have been proficiently mastered can also be applied to stably hit the specific hitting effect during training. Therefore, practicing with the football 100 having the above-mentioned identification area 2 can improve the training efficiency and effect of free kicks.

[0097] See Figure 1 and Figure 2 In some embodiments, the included angle between the two ends of the ball delivery guiding line 21 relative to the center of the sphere 1 of the sphere 1 is 90°. The included angle between the two ends of the ball placing line 22 relative to the center of the sphere 1 of the sphere 1 is 90°. One end of the ball delivery guiding line 21 is connected to one end of the ball placing line 22 and is connected to one end of the central axis line 232. The other end of the ball delivery guiding line 21 and the other end of the ball placing line 22 are both located in the horizontal central line section 231. It can be understood that in some embodiments, the section where the ball delivery guiding line 21 is located and the section where the ball placing line 22 is located are perpendicular to each other.

[0098] In some embodiments, the ball delivery guiding line 21 can be a continuously extending line, or a non-continuously extending line such as a dotted line, a dash-dotted line, or a double dash-dotted line. The ball placing line 22 can be a continuously extending line, or a non-continuously extending line such as a dotted line, a dash-dotted line, or a double dash-dotted line. The hitting reference point 241 includes but is not limited to an intersection point of two lines, a circular point, an elliptical point, a triangular point, a square point, and a polygonal point with more sides, and can be a solid point or a hollow point.

[0099] See Figure 1 and Figure 5In some embodiments, the angle between two adjacent hitting reference points 241 and the center of the sphere 1 represents the angle between the trajectories of the sphere 1 when the sphere 1 hits the ball through the two hitting reference points 241. As an illustrative example, the hitting reference point 241a located at the horizontal midline section 231 is used to practice the positioning ball close to the ground, the hitting reference point 241b is used to practice the positioning ball with a flight elevation angle of 8.4°, and the hitting reference point 241c is used to practice the positioning ball with a flight elevation angle α of 14.7°. When the sphere 1 adopts a standard No. 5 ball with a circumference of 69 cm, the arc length between the hitting reference point 241b and the hitting reference point 241a is 1.61 cm, and the arc length between the hitting reference point 241c and the hitting reference point 241a is about 2.82 cm.

[0100] See also Figure 1 In some embodiments, the hitting point group 24 further includes a topspin point 242. The topspin point 242 is spaced apart from the hitting reference point 241. The topspin point 242 is located at a section where the plurality of hitting reference points 241 are located. When the section where the ball-exiting guide line 21 is located and the section where the ball-swinging line 22 is located are both perpendicular to the ground, the topspin point 242 is located at the lower side of one of the plurality of hitting reference points 241.

[0101] When the user 1000 kicks a set-piece, the user applies a force below the hitting point at the target height that passes above the center of the ball instead of the center of the ball, thereby kicking a ball with the same angle as the "hitting point at the target height" but with a topspin rotation. After "correctly swinging the ball", the topspin point 242 is located below the corresponding hitting reference point 241, and the user 1000 can kick the ball toward the topspin point 242 to kick a topspin ball corresponding to the hitting reference point 241, so that the user 1000 can repeatedly practice the topspin ball, thereby improving the training efficiency and training effect.

[0102] In some embodiments, there are multiple topspin points 242. Each topspin point 242 is located on a side of a ball hitting reference point 241 away from the ball exit guide line 21.

[0103] In some embodiments, the upward rotation point 242 includes but is not limited to a two-line intersection point, a circular point, an elliptical point, a triangular point, a square point, a polygonal point, or an irregular point, and can be a solid point or a hollow point.

[0104] See also Figure 1 In some embodiments, the ball hitting point group 24 further includes a first side spin point 243 and a second side spin point 244. In a direction perpendicular to the cross section where the ball exit guide line 21 is located, the first side spin point 243 is spaced apart from one of the plurality of ball hitting reference points 241. In a direction perpendicular to the cross section where the ball exit guide line 21 is located, the second side spin point 244 is spaced apart from the top spin point 242.

[0105] When user 1000 kicks a placement kick, by applying a force that does not pass through the center of the ball but through the side of the center of the ball to the side of the target hitting position, a ball with the same exit angle as the "hitting point at the target height" but with a side spin rotation mode is kicked. After "correctly placing the ball", taking the horizontal midline section 231 as the "equator" position of the sphere 1, the first side spin point 243 and the corresponding hitting reference point 241 are located at similar "latitude" positions, and the second side spin point 244 and the corresponding top spin point 242 are located at similar "latitude" positions. After "correctly placing the ball", the first side spin point 243 is located on the side of the corresponding hitting reference point 241, and the second side spin point 244 is located on the side of the corresponding top spin point 242. When user 1000 kicks the ball towards the first side spin point 243, a side spin ball corresponding to the hitting reference point 241 can be kicked, and when user 1000 kicks the ball towards the second side spin point 244, a "side top spin ball" corresponding to the top spin point 242 can be kicked, thereby enabling user 1000 to repeatedly practice side spin balls and improving the training efficiency and training effect.

[0106] See Figure 1 , in some embodiments, the distance between the first side spin point 243 and the horizontal midline section 231 is equal to the distance between the corresponding hitting reference point 241 and the horizontal midline section 231. The distance between the second side spin point 244 and the horizontal midline section 231 is equal to the distance between the corresponding top spin point 242 and the horizontal midline section 231. In other embodiments, the deviation between the angle between the first side spin point 243 and the horizontal midline section 231 relative to the center of the sphere 1 and the angle between the corresponding hitting reference point 241 and the horizontal midline section 231 relative to the center of the sphere 1 is within 5°; the deviation between the angle between the second side spin point 244 and the horizontal midline section 231 relative to the center of the sphere 1 and the angle between the corresponding top spin point 242 and the horizontal midline section 231 relative to the center of the sphere 1 is within 5°.

[0107] See Figure 1 , it can be understood that in some embodiments, after "correctly placing the ball", the first side spin points 243 are provided on both the left and right sides of the hitting reference point 241, and the second side spin points 244 are provided on both the left and right sides of the top spin point 242, so that user 1000 can practice side spin balls whether running from the left or right side and touching the ball with the left or right foot.

[0108] In some embodiments, the number of the first side spin points 243 is multiple. Every two first side spin points 243 are respectively located on both sides of a hitting reference point 241 in the direction of the section perpendicular to the ball exit guiding line 21. In some embodiments, the number of the second side spin points 244 is multiple. Every two second side spin points 244 are respectively located on both sides of a top spin point 242 in the direction of the section perpendicular to the ball exit guiding line 21.

[0109] In some embodiments, the first sidespin point 243 includes, but is not limited to, an intersection point of two lines, a circular point, an elliptical point, a triangular point, a square point, a polygonal point, or an irregular-shaped point, and can be a solid point or a hollow point. The second sidespin point 244 includes, but is not limited to, an intersection point of two lines, a circular point, an elliptical point, a triangular point, a square point, a polygonal point, or an irregular-shaped point, and can be a solid point or a hollow point.

[0110] See Figure 1 and Figure 2 , in some embodiments, the identification area 2 further includes a running-up guiding mark 25. The running-up guiding mark 25 includes a plurality of running-up corner points 251. The angles between the cross-sections where different running-up corner points 251 and the central axis 232 are located and the cross-section where the ball-release guiding line 21 is located are different. The cross-section where each running-up corner point 251 and the central axis 232 are located is called a "running-up cross-section".

[0111] When the user 1000 takes a penalty kick and runs up from different directions relative to the football 100, it will affect the acting force direction of the kicking foot 1001 when the user 1000 kicks the ball. Each "running-up cross-section" and the cross-section where the ball-release guiding line 21 is located form an angle, which can be used to indicate the running-up angle of the user 1000. After "correctly placing the ball", when the user 1000 stands directly to the side of the "running-up cross-section" (that is, one eye is in front of the cross-section, the other eye is behind the cross-section, and the nose passes through the cross-section), the "running-up cross-section" can visually appear as "a straight line", which can be used to indicate the running-up included angle of the user 1000 relative to the ball-release direction, so as to facilitate the user 1000 to repeat the practice of different running-up directions and improve the training efficiency and training effect.

[0112] See Figure 1 and Figure 2 , in some embodiments, the running-up guiding mark 2 also includes a plurality of running-up guiding lines 252. Each running-up corner point 251 is provided on a running-up guiding line 252. When the cross-sections where the ball-release guiding line 21 and the ball-placement line 22 are located are both perpendicular to the ground, the cross-section where each running-up guiding line 252 is located is perpendicular to the ground. The cross-section where each running-up guiding line 252 is located is the "running-up cross-section" corresponding to the running-up corner point 251.

[0113] The cross-section where the running-up guiding line 252 is located is the "running-up cross-section" corresponding to the running-up corner point 251 and the central axis 232. After "correctly placing the ball", when the user 1000 stands directly to the side of the "running-up cross-section" where the corresponding running-up corner point 251 is located, the running-up guiding line 252 can visually appear as "a straight line" to the user 1000 and can be used to indicate the included angle between the running-up and the ball-release directions, improving the user 1000's recognition of the running-up direction and being beneficial to improving the training efficiency and training effect of the user 1000's running-up direction practice.

[0114] See Figure 1 and Figure 2 In some embodiments, multiple running-up corner points 251 may be all arranged on the horizontal center line section 231. The multiple running-up corner points 251 may be located within a 90° range relative to the center of the sphere 1 on one side of the hitting reference point 241 arranged on the horizontal center line section 231, or may be located within a 90° range relative to the center of the sphere 1 on the other side of the hitting reference point 241 arranged on the horizontal center line section 231, or multiple running-up corner points 251 may be arranged on both sides of the hitting reference point 241 arranged on the horizontal center line section 231.

[0115] As an exemplary example, the running-up corner point 251a and the running-up corner point 251b are both located on the horizontal center line section 231. The included angle between the running-up corner point 251a and the hitting reference point 241 arranged on the horizontal center line section 231 relative to the center of the sphere 1 is 45°, and the included angle between the running-up corner point 251b and the hitting reference point 241 arranged on the horizontal center line section 231 relative to the center of the sphere 1 is 45°. The running-up corner point 251a is used to indicate the running-up angle direction of 45° on the left side, and the running-up corner point 251b is used to indicate the running-up angle direction of 45° on the right side. Other running-up corner points 251 may be respectively used to indicate running-up angle directions such as 30°, 60°, 70°, etc.

[0116] In some embodiments, the running-up corner point 251 includes but is not limited to an intersection of two lines, a circular point, an elliptical point, a triangular point, a square point, a polygonal point, or an irregular-shaped point, and may be a solid point or a hollow point.

[0117] See Figure 1 and Figure 2 In some embodiments, one end of each running-up guiding line 252 is connected to the running-up corner point 251, and the other end of each running-up guiding line 252 is connected to one end of the ball-out guiding line 21 and one end of the ball-placement line 22.

[0118] In some embodiments, the running-up guiding line 252 may be a continuously extending line, or may be a non-continuously extending line such as a dotted line, a dash-dotted line, or a double dash-dotted line.

[0119] In other embodiments, the running-up guiding line 252 is omitted at the location of some running-up corner points 251 used by left-foot players, reducing the difficulty for the user 1000 to identify the identification area 2 when using the football 100. At the same time, the running-up corner point 251 is retained to facilitate the user 1000 to draw the running-up guiding line 252 by himself according to actual needs.

[0120] See Figure 3, in some embodiments, the identification area 2 further includes a penalty kick guiding identification 26. The penalty kick guiding identification 26 includes a first penalty kick corner point 261, a second penalty kick corner point 262, a third penalty kick corner point 263, and a fourth penalty kick corner point 264, which are respectively used to indicate the user 1000 to aim at the four corners of the goal when taking a penalty kick.

[0121] A penalty kick includes a penalty kick taken at the penalty spot in front of the goal. The relative positions of the first penalty kick corner point 261, the second penalty kick corner point 262, the third penalty kick corner point 263, and the fourth penalty kick corner point 264 relative to the center of the sphere 1 of the ball can respectively correspond to the four corners of the goal, so that the user 1000 can repeatedly practice the action of kicking the penalty kick towards the corner of the goal, improving the training efficiency and training effect.

[0122] See Figure 3 , in some embodiments, the first penalty kick corner point 261 and the second penalty kick corner point 262 are located in the horizontal center line section 231. The first penalty kick corner point 261 and the second penalty kick corner point 262 are spaced apart. When in use, the ball release guiding line 21 is aligned with the exact middle of the goal. The distance between the first penalty kick corner point 261 and the ball release guiding line 21 is equal to the distance between the second penalty kick corner point 262 and the ball release guiding line 21. The included angle between the first penalty kick corner point 261 and the second penalty kick corner point 262 relative to the center of the sphere 1 of the ball is 35 - 39°. The section where the third penalty kick corner point 263, the first penalty kick corner point 261, and the center of the sphere 1 of the ball are located is perpendicular to the horizontal center line section 231. The included angle between the third penalty kick corner point 263 and the first penalty kick corner point 261 relative to the center of the sphere 1 of the ball is 10.4 - 12.4°. The section where the fourth penalty kick corner point 264, the second penalty kick corner point 262, and the center of the sphere 1 of the ball are located is perpendicular to the horizontal center line section 231. The included angle between the fourth penalty kick corner point 264 and the second penalty kick corner point 262 relative to the center of the sphere 1 of the ball is 10.4 - 12.4°. When the section where the ball release guiding line 21 is located and the section where the ball placement line 22 is located are both perpendicular to the ground, both the third penalty kick corner point 263 and the fourth penalty kick corner point 264 are located below the horizontal center line section 231.

[0123] Based on the distance between the penalty spot and the goal (usually 12 yards, approximately 10.97m), the size of the goal (usually 8 yards wide, approximately 7.32m, and 8 feet high, approximately 2.44m), and the size of the sphere 1 (taking a size 5 standard ball as an example, with a diameter of approximately 22cm), it can be calculated that after "correctly placing the ball", the angle between the lower left corner of the goal and the lower right corner of the goal relative to the penalty spot is approximately 36.9°, the angle between the upper left corner of the goal and the horizontal midline section 231 is approximately 11.4°, and the angle between the upper right corner of the goal and the horizontal midline section 231 is approximately 11.4°. Therefore, the relative positions of the first penalty corner point 261, the second penalty corner point 262, the third penalty corner point 263, and the fourth penalty corner point 264 relative to the center of the sphere 1 can roughly correspond to the four corners of the goal respectively, enabling the user 1000 to repeatedly practice kicking towards the corner positions of the goal during penalty kicks, thereby improving the training efficiency and training effect.

[0124] See Figure 3 , in some embodiments, after "correctly placing the ball", when the first penalty corner point 261 is located at the hitting reference point 241 provided on the horizontal midline section 231 of the sphere 1, the first penalty corner point 261 corresponds to the lower right corner of the goal, the second penalty corner point 262 corresponds to the lower left corner of the goal, the third penalty corner point 263 corresponds to the upper right corner of the goal, and the fourth penalty corner point 264 corresponds to the upper left corner of the goal.

[0125] As an exemplary example, the angle between the first penalty corner point 261 and the second penalty corner point 262 relative to the center of the sphere 1 is 35°, 36°, 36.9°, 37°, 37.5°, 38°, 38.5°, 39°, etc., the angle between the third penalty corner point 263 and the first penalty corner point 261 relative to the center of the sphere 1 is 10.4°, 11°, 11.4°, 12°, 12.4°, etc., and the angle between the fourth penalty corner point 264 and the second penalty corner point 262 relative to the center of the sphere 1 is 10.4°, 11°, 11.4°, 12°, 12.4°, etc.

[0126] See Figure 3 , in some embodiments, the area formed by sequentially connecting the first penalty corner point 261, the second penalty corner point 262, the fourth penalty corner point 264, and the third penalty corner point 263 is the range indicating the hitting contact points within the goal range when the user 1000 takes penalty kicks.

[0127] After connecting the first penalty corner point 261, the second penalty corner point 262, the fourth penalty corner point 264, and the third penalty corner point 263, the area within the four points corresponds to the range of the goal, enabling the user 1000 to repeatedly practice the actions of kicking towards the positions within the goal range during penalty kicks, thereby improving the training efficiency and training effect.

[0128] The penalty kick guiding sign 26 further includes a first imitation goal line 265, a second imitation goal line 266, a third imitation goal line 267, and a fourth imitation goal line 268. Two ends of the first imitation goal line 265 are respectively connected to a first penalty kick corner point 261 and a third penalty kick corner point 263. A section where the first imitation goal line 265 is located coincides with a section where the first penalty kick corner point 261 and the central axis line 232 are located. Two ends of the second imitation goal line 266 are respectively connected to a second penalty kick corner point 262 and a fourth penalty kick corner point 264. A section where the second imitation goal line 266 is located coincides with a section where the second penalty kick corner point 262 and the central axis line 232 are located. Two ends of the third imitation goal line 267 are respectively connected to the third penalty kick corner point 263 and the fourth penalty kick corner point 264. Two ends of the fourth imitation goal line 268 are respectively connected to the first penalty kick corner point 261 and the second penalty kick corner point 262.

[0129] A section where the fourth imitation goal line 268 is located coincides with a horizontal center line section 231.

[0130] See Figure 1 and Figure 3 , in some embodiments, there are multiple sets of the ball releasing guiding line 21, the ball placing line 22, and the approach guiding sign 25. The hitting point group 24 is related to the position of one set, and the penalty kick guiding sign 26 is related to the position of another set. In other embodiments, the hitting point group 24 and the penalty kick guiding sign 26 may be related to the position of the same set of the ball releasing guiding line 21, the ball placing line 22, and the approach guiding sign 25.

[0131] In some embodiments, the first penalty kick corner point 261, the second penalty kick corner point 262, the third penalty kick corner point 263, and the fourth penalty kick corner point 264 include, but are not limited to, intersection points of two lines, circular points, oval points, triangular points, square points, polygonal points, or irregular-shaped points, and may be solid points or hollow points. The first imitation goal line 265, the second imitation goal line 266, the third imitation goal line 267, and the fourth imitation goal line 268 may be continuously extending lines or non-continuously extending lines such as dotted lines, dash-dotted lines, and double dash-dotted lines.

[0132] See Figure 2 and Figure 4 , in some embodiments, the marking area 2 further includes a guiding sign for assisting in drawing 27. The guiding sign for assisting in drawing 27 includes a hitting assisting line 271. When sections where the ball releasing guiding line 21 and the ball placing line 22 are located are both perpendicular to the ground, a section where the hitting assisting line 271 is located is perpendicular to the ground.

[0133] After "correctly placing the ball", the cross-section where the hitting assist line 271 is located is also perpendicular to the ground, and the hitting assist line 271 can also appear as "a straight line" in the vision of the user 1000 to guide the set target hitting direction. By taking the hitting assist line 271 and the intersection position (the hitting center point) of the hitting assist line 271 and the horizontal center line cross-section 231 as references, the user 1000 can draw points or lines by himself in the nearby area as needed, such as the hitting point group 24, the approach guiding mark 25, and the penalty kick guiding mark 26, etc., and use the hitting assist line 271 with reference to the ball exit guiding line 21 to study and measure new hitting effects. Thus, the user 1000 can adjust the training target according to his own actual needs, improving the training efficiency and training effect.

[0134] In some embodiments, one end of the hitting assist line 271 is connected to one end of the ball exit guiding line 21. The cross-section where the hitting assist line 271 is located coincides with the cross-section where the ball exit guiding line 21 is located.

[0135] See Figure 2 and Figure 4 In some embodiments, the assisting drawing guiding mark 27 further includes an assisting drawing hitting base point 272. The assisting drawing hitting base point 272 is located at the intersection of the hitting assist line 271 and the horizontal center line cross-section 231. The assisting drawing hitting base point 272 is used as a reference for the hitting reference point 241 provided on the horizontal center line cross-section 231.

[0136] In some embodiments, when the cross-section where the ball exit guiding line 21 is located and the cross-section where the ball placing line 22 is located are both perpendicular to the ground, and both the ball exit guiding line 21 and the ball placing line 22 are above the horizontal center line cross-section 231, the hitting assist line 271 is below the horizontal center line cross-section 231.

[0137] In some embodiments, the hitting assist line 271 can be a continuously extending line, or a non-continuously extending line such as a dotted line, a dash-dotted line, or a double dash-dotted line. The assisting drawing hitting base point 272 includes but is not limited to the intersection of two lines, a circular point, an oval point, a triangular point, a square point, a polygonal point, or an irregular point, and can be a solid point or a hollow point.

[0138] See Figure 1 and Figure 2 In some embodiments, the marking area 2 further includes a first ball placing point 281 and a second ball placing point 282. The first ball placing point 281 and the second ball placing point 282 are respectively located at both ends of the central axis 232.

[0139] After "correctly placing the ball", one of the first ball placement point 281 and the second ball placement point 282 should be located at the top of the sphere 1, and the other should be located at the bottom of the sphere 1. The user 1000 can assist in adjusting the placement posture of the sphere 1 by means of the positions of the first ball placement point 281 and the second ball placement point 282 relative to the ground, thereby improving the accuracy and efficiency of placing the sphere 1, which is beneficial to improving the training efficiency.

[0140] In some embodiments, the first ball placement point 281 includes but is not limited to an intersection of two lines, a circular point, an oval point, a triangular point, a square point, a polygonal point, or an irregular-shaped point, and can be a solid point or a hollow point. The second ball placement point 282 includes but is not limited to an intersection of two lines, a circular point, an oval point, a triangular point, a square point, a polygonal point, or an irregular-shaped point, and can be a solid point or a hollow point.

[0141] In some embodiments, the ball release guiding line 21, the ball placement line 22, the hitting reference point 241, the topspin point 242, the first side spin point 243, the second side spin point 244, the running-up guiding mark 25, the penalty kick guiding mark 26, the assisting drawing guiding mark 27, the first ball placement point 281, and the second ball placement point 282 can be set to the same color or can be set to different colors respectively.

[0142] In some embodiments, the marking area 2 is sprayed onto the sphere 1 with paint or pasted onto the sphere 1 with a sticker or printed onto the sphere 1.

[0143] The methods of paint spraying, sticker pasting, and printing can improve the speed and accuracy of setting the marking area 2 on the sphere 1 and improve the production efficiency of the football 100.

[0144] See Figure 6 , in some embodiments, the usage method of the football 100 includes placing the ball, preparing for a running-up, and hitting the ball.

[0145] Placing the ball: Using the ball release guiding line 21 and the ball placement line 22 as visual references, making the ball release guiding line 21 "vertical" to the ground visually and making the ball placement line 22 "vertical" to the ground visually. Then rotate the sphere 1 to align the ball release guiding line 21 with the set target position.

[0146] Running-up preparation: According to the running-up angle to be practiced, select the corresponding running-up corner point 251 or running-up guiding line 252, and move away from the sphere 1 along the direction indicated by the running-up corner point 251 or running-up guiding line 252 to a set distance. In the vision of the user 1000, the cross-section where the running-up corner point 251 and the central axis 232 are located, i.e., the running-up cross-section, is "a straight line", and forms an intersection line with the ground. In the vision of the user 1000, the running-up guiding line 252 is "a straight line"; then, by translating the body left or right, select the applicable route parallel to the "intersection line of the ground and the running-up cross-section" as the final running-up route. As an exemplary example, refer to Figure 2 , the final running-up route corresponding to the running-up corner point 251a is the running-up route 251A, Figure 2 in which the running-up route 251A is parallel to the running-up cross-section corresponding to the running-up corner point 251a.

[0147] Hitting the ball: Aim at one of the hitting reference point 241, topspin point 242, first side-spin point 243, second side-spin point 244, and penalty kick guiding mark 26 to be practiced, run towards the sphere 1, and finally hit the position on the sphere 1 aimed at with the kicking foot 1001.

[0148] In the related art, when the user 1000 is practicing free kicks, in order to form a movement habit and muscle memory, at the moment of hitting the ball, the distance relationship between the position of the kicking foot 1001 used to hit the ball and the supporting foot 1002 of the user 1000 is basically fixed. And the position of the kicking foot 1001 of the user 1000 used to hit the ball (such as the metatarsal part of the dorsal side of the foot) at the position where the sphere 1 is touched is relatively fixed in each practice. If the position of the supporting foot 1002 relative to the sphere 1 changes during each practice, in order to maintain the specified position of the kicking foot 1001 to hit the ball and touch the specified position of the sphere 1, the body posture of the user 1000 needs to be forced to make corresponding adjustments, resulting in deformed movements and being unable to hit the ball naturally and powerfully, thus leading to poor ball delivery quality and reduced training effect. Therefore, during each practice, it is necessary to maintain the position of the supporting foot 1002 of the user 1000 relative to the sphere 1 fixed.

[0149] Refer to Figure 6 , an embodiment of the present application provides a training component 200. The training component 200 includes a supporting foot marker 210 and a football 100 as described in any of the above embodiments.

[0150] The supporting foot marker 210 includes a horizontal positioning section 2102, a first marking portion 2103, and a second marking portion 2104. The horizontal positioning section 2102 is configured to be deformed by an external force and is perpendicular to the cross-section where the ball release guiding line 21 is located during use. The second marking portion 2104 is located at the end of the horizontal positioning section 2102. The first marking portion 2103 is disposed on the horizontal positioning section 2102 and can slide freely on the horizontal positioning section 2102 to adjust the distance between the first marking portion 2103 and the second marking portion 2104, so as to guide the preset landing point of the supporting foot 1002 of the user 1000 on the ground, and constitute the positional relationship between the supporting foot 1002 and the football 100.

[0151] The football 100 can produce a mathematical "orthographic projection" on the ground (similar to the perspective of looking down at the football 100 with the eyes directly above the football 100), which is a perfect circle. The orthographic projections of all points on the spherical surface (including the hitting point) will also be at a certain fixed position within the orthographic projection of the sphere 1 on the ground. The positional relationship of the orthographic projections of all points on the spherical surface (such as the hitting reference points 241b and 241a) on the ground is also fixed. See Figure 6 , Figure 6 The structures shown in are the diagrams of the orthographic projections corresponding to the respective structures.

[0152] The actual hitting point is at a fixed height above the ground directly above the "orthographic projection of the hitting point" on the ground. Therefore, the positional relationship between the actual hitting point and its "orthographic projection of the hitting point" on the ground is fixed. By adjusting the two-dimensional positional relationship between the first marking portion 2103 on the ground (indicating the landing point of the supporting foot 1002) and the orthographic projection of a specific hitting point on the ground, the positional relationship between the landing point of the supporting foot 1002 and the actual hitting point can be adjusted.

[0153] First, place the supporting foot marker 210 at a rough position next to the penalty spot on the ground, and keep the horizontal positioning section 2102 perpendicular to the ball release line. After "correctly placing the ball", by translating the football left or right, set the distance between the cross-section where the ball release guiding line 21 is located and the second marking portion 2104 of the supporting foot marker 210 to the length of the radius of the sphere 1 and keep it. Then, by sliding the first marking portion 2103 on the horizontal positioning section 2102, adjust the horizontal distance of the first marking portion 2103 relative to the cross-section where the ball release guiding line 21 is located. Finally, by translating the football 100 forward or backward with the cross-section where the ball release guiding line 21 is located as the central axis to determine the position of the horizontal positioning section 2102 relative to the orthographic projection of the hitting point group 24 on the ground, thereby adjusting the positional relationship between the landing point of the supporting foot 1002 and the actual hitting point, and giving a guiding for the "correct standing position" of the supporting foot 1002 of the user 1000, which is convenient for the user 1000 to repeat the practice of the standing position of the supporting foot 1002 and improve the training effect.

[0154] As an exemplary example, the first marking portion 2103 is used to indicate the standing position at the middle of the inner side of the sole or the inner side of the ankle of the support foot 1002 of the user 1000.

[0155] See Figure 6 , in some embodiments, the support foot marker 210 further includes a length reference segment 2101. The length reference segment 2101 is connected to the lateral positioning segment 2102 and is connected at the position of the second marking portion 2104. The length of the length reference segment 2101 is used as a dimension reference when adjusting the distance between the first marking portion 2103 and the second marking portion 2104, or as a reference for the vertical distance between the orthographic projection of the hitting point group 24 in the extending direction of the lateral positioning segment 2102.

[0156] By bending the length reference segment 2101 to be parallel and overlapped with the lateral positioning segment 2102 and sliding the first marking portion 2103 to adjust its position by referring to the length of the length reference segment 2101, the position of the first marking portion 2103 relative to the second marking portion 2104 or the actual hitting point can be quickly adjusted, which is beneficial to improving the training efficiency.

[0157] See Figure 6 , in some embodiments, the length reference segment 2101 is configured to be deformable under an external force and be parallel to the plane of the ball exit guiding line 21 during use. When using the support foot marker 210, the length of the length reference segment 2101 can also be used as a reference for the vertical distance between the orthographic projection of the hitting point group 24 in the extending direction of the lateral positioning segment 2102, so as to position the relative position between the lateral positioning segment 2102 and the hitting point in the extending direction of the lateral positioning segment 2102.

[0158] In some embodiments, the length reference segment 2101 and the lateral positioning segment 2102 are rope-like structures that can be bent and deformed.

[0159] See Figure 6 , in some embodiments, the length reference segment 2101 and the lateral positioning segment 2102 are integrally formed structures. The integrally formed length reference segment 2101 and lateral positioning segment 2102 are convenient to carry and place, and make the connection between the length reference segment 2101 and the lateral positioning segment 2102 stable, reducing the possibility of separation during the training process of the user 1000 and improving the service life.

[0160] In other embodiments, the length reference segment 2101 and the lateral positioning segment 2102 are split structures and can be formed by a single rope or a combination of multiple ropes respectively.

[0161] See Figure 6 , in some embodiments, the length reference segment 2101 and the lateral positioning segment 2102 are formed by tying knots in ropes.

[0162] It is set by tying a knot, which is convenient for setting the length of the length reference section 2101 (for example, setting it to the diameter length of a standard No. 4 ball or a standard No. 5 ball), so as to adjust the position relative to the orthographic projection of the hitting point group 24 as needed.

[0163] See Figure 6 , in some embodiments, the first marking portion 2103 is tied to the lateral positioning section 2102 by another short rope in a way such as tying a knot. In other embodiments, the first marking portion 2103 can be formed by tying a knot with the lateral positioning section 2102 itself.

[0164] As an exemplary example, when the sphere 1 uses a standard No. 5 ball with a circumference of 69 cm, the vertical distance L1 between the extension line of the lateral positioning section 2102 and the orthographic projection of the hitting point group 24 ( Figure 6 shown in

[0165] See Figure 6 , in some embodiments, the usage methods of the training assembly 200 include swinging the rope, swinging the ball, moving the ball, taking a running start, dropping the supporting foot, and hitting the ball. Swinging the rope: First, place the support foot marker 210 at a general position next to the ground penalty kick point, and then place the lateral positioning section 2102 and the length reference section 2101 in the desired orientations. Keep the lateral positioning section 2102 perpendicular to the ball - leaving line and maintain it thereafter, and keep the length reference section 2101 parallel to the ball - leaving direction and maintain it thereafter. Adjust the position of the first marking portion 2103 and adjust the distance L2 between the first marking portion 2103 and the second marking portion 2104 to the proper position.

[0166] Swinging the ball: Make the ball - leaving guide line 21 "perpendicular" to the ground, make the ball - swinging line 22 "perpendicular" to the ground, rotate the football in place, and align the ball - leaving guide line 21 with the direction of the preset hitting target.

[0167] Ball movement: By horizontally translating the football 100 to the left or right, the vertical distance between the cross-section where the ball delivery guiding line 21 is located and the second marking part 2104 of the supporting foot marker 210 is set to the length of the radius of the sphere 1 and then maintained (at this time, the length reference segment 2101 and the circumferential line of the orthographic projection of the sphere 1 on the ground maintain a "tangent" relationship). Finally, by horizontally translating the sphere 1 in the direction indicated by the ball delivery guiding line 21 forward or backward, the position of the extension line of the lateral positioning segment 2102 relative to the orthographic projection of the hitting point group 24 on the ground is determined, thereby adjusting the positional relationship between the landing point of the supporting foot 1002 and the actual hitting point, and giving the user 1000 a guidance on the "correct stance" of the supporting foot 1002, facilitating the user 1000 to repeat the stance of the supporting foot 1002 for practice and improving the training effect.

[0168] Approach run: According to the approach run angle to be practiced, select the corresponding approach run corner point 251 or approach run guiding line 252, and move away from the sphere 1 along the direction indicated by the approach run corner point 251 or approach run guiding line 252 to a set distance. In the user 1000's vision, the cross-section where the approach run corner point 251 and the central axis 232 are located, i.e., the approach run cross-section, is "a straight line" and forms an intersection line with the ground, and the approach run guiding line 252 in the user 1000's vision is "a straight line"; then, by horizontally translating the body to the left or right, select an applicable line parallel to the "intersection line of the ground and the approach run cross-section" as the final approach run route. As an exemplary example, see Figure 2 , the final approach run route corresponding to the approach run corner point 251a is the approach run route 251A, Figure 2 where the approach run route 251A in is parallel to the approach run cross-section corresponding to the approach run corner point 251a.

[0169] Landing the supporting foot: After the approach run, overlap the designated position on the sole of the supporting foot 1002 (such as the middle part of the inner sole of the user 1000's supporting foot 1002 or the position of the inner ankle) on the position set by the first marking part 2103 of the supporting foot marker 210 on the ground.

[0170] Hitting the ball: Aim at one of the hitting reference point 241, topspin point 242, first side spin point 243, second side spin point 244, and penalty kick guiding mark 26 to be practiced, and finally hit the position on the sphere 1 aimed at with the ball-touching foot 1001.

[0171] In this application, various "lines" in the marking area 2 are linear areas with a certain width, and various "points" are point-shaped areas with a certain diameter.

[0172] In addition, those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate this application, rather than to limit this application. As long as it is within the scope of the essential spirit of this application, appropriate changes and variations made to the above embodiments fall within the scope of the disclosure of this application.

Claims

1. A football, characterized in that: The football has a spherical body and a marking area provided on the surface of the spherical body. The marking area includes a ball delivery guiding line, a ball placement line, and a hitting point group respectively arranged on the surface of the spherical body. The ball delivery guiding line and the ball placement line are located in different cross-sections, and each cross-section is a cross-section passing through the center of the spherical body. The hitting point group includes a plurality of hitting reference points distributed at intervals. The cross-section where the distribution path of the plurality of hitting reference points is located coincides with the cross-section where the ball delivery guiding line is located. The horizontal median cross-section is defined as the cross-section passing through the center of the spherical body. When the cross-section where the ball delivery guiding line is located and the cross-section where the ball placement line is located are both perpendicular to the ground, the horizontal median cross-section is parallel to the ground, and the plurality of hitting reference points are distributed downward from the horizontal median cross-section.

2. The football according to claim 1, characterized in that: The central axis is defined as the intersection line of the cross-section where the ball delivery guiding line is located and the cross-section where the ball placement line is located. The marking area further includes a running-up guiding mark, and the running-up guiding mark includes a plurality of running-up corner points. The included angles between different running-up corner points and the cross-section where the central axis is located and the cross-section where the ball delivery guiding line is located are different.

3. The football according to claim 2, characterized in that: The running-up guiding mark further includes a plurality of running-up guiding lines, and each running-up corner point is arranged on one of the running-up guiding lines. When the cross-section where the ball delivery guiding line is located and the cross-section where the ball placement line is located are both perpendicular to the ground, the cross-section where each running-up guiding line is located is perpendicular to the ground.

4. The football according to any one of claims 1 to 3, characterized in that: The marking area further includes a penalty kick guiding mark, and the penalty kick guiding mark includes a first penalty kick corner point, a second penalty kick corner point, a third penalty kick corner point, and a fourth penalty kick corner point, which are respectively used to indicate the four corners of the goal when the user takes a penalty kick.

5. The football according to claim 4, characterized in that: The area formed by connecting the first penalty kick corner point, the second penalty kick corner point, the fourth penalty kick corner point, and the third penalty kick point in sequence is the range indicating the hitting contact points within the range of aiming at the goal when the user takes a penalty kick.

6. The football according to any one of claims 1 to 3, characterized in that: The hitting point group further includes a first side spin point. In the direction perpendicular to the cross-section where the ball delivery guiding line is located, the first side spin point is distributed at intervals with one of the plurality of hitting reference points.

7. The football according to any one of claims 1 to 3, characterized in that: The hitting point group further includes an upper spin point, and the upper spin point is arranged at intervals with the hitting reference point. The upper spin point is located in the cross-section where the plurality of hitting reference points are located. When the cross-section where the ball delivery guiding line is located and the cross-section where the ball placement line is located are both perpendicular to the ground, the upper spin point is located below one of the plurality of hitting reference points.

8. The football according to claim 7, characterized in that: The hitting point group further includes a second side spin point. In the direction perpendicular to the cross-section where the ball delivery guiding line is located, the second side spin point is distributed at intervals with the upper spin point.

9. The football according to any one of claims 1 to 3, characterized in that: The marking area further includes a drawing assistance guiding mark, and the drawing assistance guiding mark includes a hitting assistance drawing line and a drawing assistance hitting base point. The drawing assistance hitting base point is located at the intersection of the hitting assistance drawing line and the horizontal median cross-section. When the cross-section where the ball delivery guiding line is located and the cross-section where the ball placement line is located are both perpendicular to the ground, the cross-section where the hitting assistance drawing line is located is perpendicular to the ground.

10. The football according to any one of claims 1 to 3, characterized in that: Define the central axis as the intersection line of the section where the ball release guiding line is located and the section where the pendulum ball line is located. The identification area further includes a first pendulum ball point and a second pendulum ball point, and the first pendulum ball point and the second pendulum ball point are respectively located at both ends of the central axis.

11. The football according to any one of claims 1 to 3, characterized in that: The identification area is applied to the sphere by paint spraying, or by pasting a sticker to the sphere, or by printing on the sphere.

12. A training component, characterized in that, It includes a support foot marker and a football as described in any one of claims 1 to 11. The support foot marker includes a horizontal positioning section, a first marking portion, and a second marking portion. The horizontal positioning section is perpendicular to the section where the ball release guiding line is located during use. The second marking portion is located at the end of the horizontal positioning section. The first marking portion is provided on the horizontal positioning section and can move freely on the horizontal positioning section to adjust the distance between the first marking portion and the second marking portion, so as to guide the preset landing point of the user's support foot on the ground and form the positional relationship between the support foot and the football.

13. The training component according to claim 12, characterized in that: The support foot marker further includes a length reference section. The length reference section is connected to the horizontal positioning section and is connected at the position of the second marking portion. The length of the length reference section is used as a dimension reference when adjusting the distance between the first marking portion and the second marking portion.

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