CN216222871U

CN216222871U - Ball training device with variable space size

Info

Publication number: CN216222871U
Application number: CN202122769631.8U
Authority: CN
Inventors: 冷明军
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-04-08
Anticipated expiration: 2031-11-12

Abstract

The utility model provides a ball training device with variable space, which comprises a movable platform, a supporting component, a limiting protective net and a telescopic connecting frame, wherein the movable platform comprises a plurality of platform single bodies which are detachably connected with each other; a plurality of supporting components are arranged around the outer side of the movable platform; the limiting protective net is connected with the supporting component; the telescopic connection frame is connected with the limiting protection net, the telescopic connection frame is provided with a plurality of parts, and any telescopic connection frame is arranged between two adjacent supporting components and detachably connected with the two corresponding supporting components. The ball training device with the variable space size can freely change the size of the training space by adjusting the number of the platform monomers, the size and the number of the limiting protective nets and the length and the number of the telescopic connecting frames according to needs, and has a wider application range; the limiting protective net limits the movement range of the ball, reduces the time delay of ball picking, improves the training efficiency, avoids accidental injury to surrounding people or objects, and obviously improves the safety performance.

Description

Ball training device with variable space size

Technical Field

The utility model relates to the technical field of sports equipment, in particular to a ball training device with a variable space size.

Background

The football is a ball game which is widely liked, because the range of the football is far, the training standard field of the common football is in a wider outdoor area, but the football training of football fans can not be satisfied in special occasions such as snowy days and the like or nearby fields which are wide enough and do not satisfy the conditions; moreover, due to the particularity of the football, when the user plays the football, the user can roll far, the football is very troublesome to pick up, meanwhile, the space is not wide enough, the user can easily accidentally injure others when playing the football, and when a plurality of users train simultaneously, the user can also interfere with each other greatly, so that great inconvenience is caused for the football training.

The existing football field can not meet the requirement of football fans for kicking the football anytime and anywhere, can not solve the problem that the football is difficult to pick up in a larger field or the field is few, and the finding of a ball practicing field by teenagers is very difficult and expensive; the mutual interference of the multi-person ball practice is easy to generate; easily cause accidental injury.

SUMMERY OF THE UTILITY MODEL

To solve the above problems, an object of the present invention is to provide a ball training device with a variable space.

The embodiment of the utility model provides a ball training device with variable space size, which comprises:

the movable platform comprises a plurality of platform single bodies which are detachably connected with each other;

a plurality of supporting components are arranged around the outer side of the movable platform;

the limiting protective net is connected with the supporting component;

the flexible link, with spacing protecting wire net is connected, flexible link erects and is equipped with a plurality of, arbitrary flexible link erects and arranges in adjacent two between the supporting component, and with correspond two the connection can be dismantled to the supporting component.

Preferably, any of the support assemblies comprises:

the stabilizing bracket is used for supporting on the ground;

one end of the supporting cylinder is connected with the stabilizing bracket;

the telescopic sliding rod is connected with the supporting cylinder in a sliding manner and is arranged at the other end of the supporting cylinder;

and the first fastener is simultaneously connected with the telescopic slide bar and the support cylinder and is used for fixing the telescopic slide bar on the support cylinder.

Preferably, the stabilizing support comprises:

the supporting seat is connected with the supporting cylinder;

the adjusting seat is connected with the supporting cylinder in a sliding manner;

the second fastening piece is simultaneously connected with the adjusting seat and the supporting cylinder and penetrates through the adjusting seat to be abutted against the supporting cylinder;

the support group is hinged to the supporting seat and the adjusting seat, and a plurality of support groups are arranged along the circumferential direction of the supporting seat.

Preferably, the platform single bodies are of rectangular structures, and the platform single bodies are arranged side by side along the length and width directions of the platform single bodies respectively; the movable platform is of a rectangular structure; four support groups are arranged at equal intervals along the circumferential direction of the supporting seat, and the stabilizing supports are of a cross structure; the two collinear support groups are parallel to one edge of a right angle on the movable platform, and the other two collinear support groups are parallel to the other edge of the right angle on the movable platform; the supporting cylinder is arranged close to the vertex of the right angle on the movable platform.

Preferably, the supporting component is equipped with four, and follows the movable platform edge is named first support group, second support group, third support group and fourth support group in proper order, first support group with be equipped with two between the second support group the flexible link, two flexible link set up respectively in the both ends of first support group.

Preferably, the telescopic connecting frame is arranged at one end, far away from the ground, between the first supporting group and the fourth supporting group, and the telescopic connecting frame is also arranged at one end, far away from the ground, between the second supporting group and the third supporting group; or/and any telescopic connecting frame is horizontally arranged.

Preferably, both ends of any telescopic connection frame can be detachably connected with a connecting fastener, and the connecting fastener is detachably connected with the supporting component.

In the scheme provided by the embodiment of the utility model, the ball training device with the variable space size can freely change the size of the training space by adjusting the number of the platform monomers, the size of the limiting protection net and the length of the telescopic connecting frame according to requirements, and has wider adaptability range; the freely changed training area can adapt to different training requirements, a small space corresponds to single training, a large space corresponds to multi-person confrontation training, and the training spaces do not interfere with each other during single training and multi-person training; through the setting of spacing protecting wire net, can restrict the motion range of ball, reduce and pick up the ball and delay the time, improve training efficiency, also can not mutual interference between training space and the external world, do not have the restriction to service environment, also can build the use indoor, can not cause the accidental injury to people or thing around, and the security performance is showing and is improving. The utility model meets the requirement of football fans for kicking the football anytime and anywhere, and solves the problems of few and expensive football practice fields; the ball is difficult to pick up in a large field; the mutual interference of the multi-person ball practice is easy to generate; the problem of accidental injury is easily caused, the structure is simple, the effect is obvious, and the device is suitable for wide popularization.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating a spatial dimension variable ball training device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram illustrating structures of a ball training device with a variable space size, except for a limiting protective net, according to an embodiment of the present invention;

FIG. 3 is a schematic top view of a variable-size ball training device according to an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating a support assembly of a variable-size ball training device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram illustrating a stabilizing brace of a variable-size ball training device according to an embodiment of the present invention.

Icon:

1. a movable platform; 2. a support assembly; 3. limiting and protecting the net; 4. a telescopic connecting frame; 5. connecting fasteners; 11. a platform monomer; 21. a stabilizing support; 22. a support cylinder; 23. a telescopic slide bar; 24. a first fastener; 211. a supporting seat; 212. an adjusting seat; 213. a second fastener; 214. a bracket set; 221. a limiting chute; 251. a first support group; 252. a second support group; 253. a third support group; 254. a fourth support group; 2121. limiting clamping protrusions; 2141. a first support bar; 2142. a second support bar.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 5, an embodiment of a ball training device with a variable space size according to the present invention will now be described. The ball training device with the variable space size comprises a movable platform 1, a supporting component 2, a limiting protective net 3 and a telescopic connecting frame 4, wherein the movable platform 1 comprises a plurality of platform single bodies 11 which are detachably connected with each other; a plurality of supporting components 2 are arranged around the outer side of the movable platform 1; the limiting protective net 3 is connected with the supporting component 2; the telescopic connection frame 4 is connected with the limiting protection net 3, the telescopic connection frame 4 is provided with a plurality of, and any telescopic connection frame 4 is arranged between two adjacent supporting assemblies 2 and is detachably connected with the two corresponding supporting assemblies 2.

For convenience of explanation, please refer to fig. 1, a rectangular coordinate system is established with any point in space as an origin, the setting direction of the support assembly 2 as a Z-axis, the length direction of the movable platform 1 as an X-axis, and a linear direction perpendicular to both the X-axis and the Z-axis as a Y-axis, wherein an XY plane is a horizontal plane, a direction indicated on the horizontal plane is a horizontal direction, and a direction indicated on the Z-axis is a vertical direction.

In this embodiment, be the mode that can dismantle the connection between activity platform 1, supporting component 2, spacing protecting wire net 3 and the flexible link 4, this kind of changeable ball trainer dismouting of space size is simple, can build the use anytime and anywhere, and it is little to dismantle the occupation space of accomodating the back. Spacing protecting wire net 3 can be the latticed structure that twine formed for the rope made of hemp, and flexible link 4 can pass the realization from the mesh of spacing protecting wire net 3 and support fixed to spacing protecting wire net 3, also can be connected flexible link 4 with spacing protecting wire net 3 with the latch closure and support fixedly. The telescopic connection frame 4 can comprise an outer tube and an inner rod connected with the outer tube in a sliding mode, threaded holes are formed in the outer tube, bolts penetrate through the outer tube and the inner rod in a butt mode, and the bolts are loosened to adjust the position relation between the inner rod and the outer tube. The movable platform 1 can be in a rectangular, triangular or other polygonal structure; the support assembly 2 is provided with three or five or six etc.; the stabilizing support 21 is a triangular structure and is used for supporting the limiting protecting net 3, and the protection range of the application is within the protection range as long as the relevant performance functions of the movable platform 1 and the stabilizing support 21 can be realized.

As another embodiment of the present invention, the platform single body 11 of the ball training device with variable space size is a rectangular structure, and a plurality of platform single bodies 11 are respectively arranged side by side along the length and width directions of the platform single bodies 11; the movable platform 1 is a rectangular structure.

In this embodiment, the area formed between the movable platform 1 and the limiting protection net 3 is a training space, the platform single bodies 11 may be square ground mats, a plurality of platform single bodies 11 are divided into two parts, a convex buckle is arranged on one part of the platform single bodies 11, a groove clamped with the convex buckle is arranged on the other part of the platform single bodies 11, the convex buckle and the groove are clamped to realize the connection between the adjacent platform single bodies 11, and the disassembly and assembly are convenient; both sides of the platform single body 11 are provided with anti-slip lines, one side of the anti-slip lines is in contact with the ground, the anti-slip lines increase the friction force between the anti-slip lines and the ground, and the other side of the anti-slip lines is in contact with the soles of the users, so that the users can move on the movable platform 1 more easily and cannot slip.

Compared with the prior art, the ball training device with the variable space size can freely change the size of the training space by adjusting the number of the platform single bodies 11, the size of the limiting protective net 3 and the length of the telescopic connecting frame 4 according to requirements, and has wider adaptability range; the freely changed training area can adapt to different training requirements, a small space corresponds to single training, a large space corresponds to multi-person confrontation training, and the training spaces do not interfere with each other during single training and multi-person training; through the setting of spacing protecting wire net 3, can restrict the motion range of ball, reduce and pick up the ball and delay the time, improve training efficiency, also can not mutual interference between training space and the external world, do not have the restriction to service environment, also can build the use indoor or at home, can not cause the accidental injury to people or thing around, can not disturb adjacent, the security performance is showing and is improving.

As another embodiment of the utility model, any supporting component 2 of the ball training device with variable space size comprises a stabilizing bracket 21, a supporting cylinder 22, a telescopic sliding rod 23 and a first fastener 24, wherein the stabilizing bracket 21 is used for supporting on the ground; one end of the supporting cylinder 22 is connected with the stabilizing bracket 21; the telescopic sliding rod 23 is connected with the supporting cylinder 22 in a sliding manner and is arranged at the other end of the supporting cylinder 22; a first fastener 24 is connected to both telescopic slide 23 and support cylinder 22 for securing telescopic slide 23 to support cylinder 22.

In this embodiment, the first fastening member 24 may be a combined structure of an open fixing sleeve and a bolt, the opening of the fixing sleeve is parallel to the axial direction of the supporting cylinder 22, two sides of the opening on the fixing sleeve are provided with a protrusion, one of the protrusions is provided with a threaded hole, the other protrusion is provided with a circular through hole, the bolt penetrates through the two protrusions, and the rotation of the bolt drives the protrusion to move so as to change the size of the opening; one end of the fixing sleeve is sleeved on the supporting cylinder 22 in a penetrating mode, the other end of the fixing sleeve is sleeved on the telescopic sliding rod 23 in a penetrating mode, the bolt controls the size of an opening of the fixing sleeve, when the opening is large, the telescopic sliding rod 23 can slide up and down along the supporting cylinder 22, and when the opening is small, the telescopic sliding rod 23 is pressed tightly to limit displacement of the telescopic sliding rod 23.

As another embodiment of the present invention, the stabilizing frame 21 of the ball training device with variable space size comprises a supporting seat 211, an adjusting seat 212, a second fastening member 213 and a frame set 214, wherein the supporting seat 211 is fixedly connected with the supporting cylinder 22; the adjusting seat 212 is connected with the supporting cylinder 22 in a sliding way; the second fastening member 213 is connected to the adjusting seat 212 and the supporting cylinder 22, the second fastening member 213 penetrates through the adjusting seat 212 and abuts against the supporting cylinder 22, and the second fastening member 213 may be a bolt; the support set 214 is hinged to the support base 211 and the adjusting base 212, and a plurality of support sets 214 are arranged along the circumferential direction of the support base 211.

As another embodiment of the present invention, the bracket set 214 includes a first supporting rod 2141 and a second supporting rod 2142, wherein one end of the first supporting rod 2141 is hinged to the supporting seat 211, the other end of the first supporting rod 2141 abuts against the ground, the supporting seat 211 is provided with a limiting groove, the first supporting rod 2141 is disposed in the limiting groove, and the limiting groove is used for limiting the displacement of the first supporting rod 2141 in the circumferential direction of the supporting seat 211; one end of the second supporting rod 2142 is hinged to the adjusting seat 212, and the other end is hinged to the first supporting rod 2141. The second fastening member 213 is unscrewed, the adjusting base 212 is adjusted to a proper position by sliding up and down along the supporting cylinder 22, and the bracket set 214 extends or contracts along with the movement of the adjusting base 212 and simultaneously lowers or raises.

In this embodiment, the supporting cylinder 22 is provided with a limiting sliding groove 221, and the adjusting seat 212 is provided with a limiting protrusion 2121 engaged with the limiting sliding groove 221. The limiting sliding groove 221 limits the adjusting seat 212 to rotate along the circumferential direction of the supporting cylinder 22, so that the adjusting seat 212 only moves up and down along the axial direction of the supporting cylinder 22 during adjustment, and the movement is more stable.

As another embodiment of the utility model, four support groups 214 of the ball training device with variable space size are equidistantly arranged along the circumferential direction of the supporting seat 211, the stabilizing support 21 is of a cross-shaped structure, the cross-shaped structure is more stable and is not easy to topple over, the stabilizing support 21 can also be of a structure shaped like a Chinese character 'mi', but the cross-shaped structure is simpler in structure and lower in cost on the basis of stability, and is more suitable for popularization and application; the two collinear support groups 214 are parallel to one edge of the right angle on the movable platform 1, and the other two collinear support groups 214 are parallel to the other edge of the right angle on the movable platform 1; the supporting cylinder 22 is arranged close to the right-angled vertex on the movable platform 1, and the supporting component 2 is arranged close to the movable platform 1 as much as possible, so that the occupied area of the supporting component 2 is effectively reduced, and the stability is better.

As another embodiment of the present invention, the support assemblies 2 of the ball training device with variable space size are provided with four support assemblies, which are sequentially named as a first support group 251, a second support group 252, a third support group 253 and a fourth support group 254 along the edge of the movable platform 1, two telescopic connection frames 4 are arranged between the first support group 251 and the second support group 252, and the two telescopic connection frames 4 are respectively arranged at two ends of the first support group 251. The first support group 251, the second support group 252 and the two telescopic connecting frames 4 form a rectangle, namely four sides of one side surface of the limiting protection net 3 are fixed on four sides of the rectangle and are tensioned, the limiting protection net 3 has certain elasticity, and the ball can rebound more powerfully after tensioning.

In this embodiment, the telescopic connection frame 4 is disposed between the first support group 251 and the fourth support group 254 and at the end far from the ground, and the telescopic connection frame 4 is also disposed between the second support group 252 and the third support group 253 and at the end far from the ground; or/and any telescopic connecting frame 4 is horizontally arranged. This structure only sets up two flexible link 4 in a side, only sets up flexible link 4 at the top at both sides face and supports fixedly, is applicable to the condition that the ball was only played forward this moment, and the structure is simpler, and it is more convenient to load and unload.

As another embodiment of the present invention, a telescopic connecting frame 4 is also arranged between the first supporting group 251 and the fourth supporting group 254 of the ball training device with variable space size and at one end close to the ground; or/and between second support group 252 and the third support group 253, and the one end that is close to ground also is equipped with flexible link 4, sets up flexible link 4 like this in the one end that is close to ground as required, can restrict the ball in a plurality of directions, and the structure of whole device is more stable, and the user uses the limitation littleer, more convenient.

As another embodiment of the utility model, both ends of any telescopic connecting frame 4 of the ball training device with variable space size can be detachably connected with connecting fasteners 5, and the connecting fasteners 5 are detachably connected with the supporting component 2. The one end of flexible link 4 and the 5 fixed connection of the connection fastener that corresponds, the other end and the 5 sliding connection of another connection fastener that corresponds, when adjusting the height in training space, can adjust the height of one end supporting component 2 earlier, adjust the height of other end supporting component 2 again, because in the accommodation process, can form the difference in height between two supporting component 2, the change of adaptation difference in height that the fixed other end sliding connection's of flexible link 4 one end mode can be fine, the condition that the card pauses can not appear in accommodation process, it is more convenient to dismantle.

In this embodiment, the connecting fastener 5 is provided with a first through hole and a second through hole, and the first through hole is used for accommodating the supporting component 2 to pass through; the second through hole is used for accommodating the telescopic connecting frame 4 to pass through; two fastening bolts are arranged on the connecting fastener 5, and the two fastening bolts penetrate through the connecting fastener 5 and respectively extend into the first through hole and the second through hole.

As another embodiment of the utility model, the limiting protective net 3 of the ball training device with the variable space size comprises a plurality of net sheet units, and the net sheet units are detachably connected through fixing clamps. The fixing clamp can be a dovetail clamp, a spring clamp or a rope for binding and fixing the net sheet units, and the proper number of net sheet units are selected for splicing according to the size of the training space, so that the performance of the fixing clamp can be realized within the protection scope of the utility model. After the spacing protecting net 3 and the telescopic connection frame 4 are installed, an opening for a user to come in and go out of a training space is reserved between net piece units on one side of the spacing protecting net 3, the user can use the net piece unit connection on the two sides of the opening by using a fixing clamp after entering the training space, the structure is convenient to go in and out and can be installed along with the change adaptation of the training space, the adaptability is better, and the use is more convenient.

The specific installation and use steps of the ball training device with the variable space size comprise:

s1, calculating the size of the required movable platform 1 according to the requirement, and selecting a proper number of platform monomers 11 for splicing;

s2, inserting the telescopic slide rod 23 into the support cylinder 22, adjusting the adjusting seat 212 to a proper height, moving the whole support assembly 2 to a position close to the movable platform 1, and clamping the cross included angle of the stabilizing support 21 with the right angle of the movable platform 1;

s3, sequentially assembling and placing the other three supporting components 2 to the other three right angles of the movable platform 1 according to the steps in S2, and installing a proper number of connecting fasteners 5 on the supporting components 2;

s4, sleeving the limiting protective net 3 on the telescopic connecting frame 4, and installing the sleeved telescopic connecting frame 4 on the connecting fastener 5 to complete installation of the telescopic connecting frame 4 required by one end, far away from the ground, of the supporting component 2 (if the limiting protective net 3 with small meshes is used, the telescopic connecting frame 4 needs to be installed firstly, and then the limiting protective net 3 is fixed on the telescopic connecting frame 4 by using a ring fastener);

s5, adjusting the relative position relation between the telescopic slide bar 23 and the support cylinder 22, namely lifting the telescopic slide bar 23 to a proper position, screwing the first fastener 24 to fix the telescopic slide bar 23, and completing the adjustment of all the telescopic slide bars 23;

s6, the limiting protective net 3 is sleeved on the rest telescopic connecting frames 4, the sleeved telescopic connecting frames 4 are installed on the connecting fasteners 5, and installation of the telescopic connecting frames 4 required by one end, close to the ground, of the supporting component 2 is completed. Can get into the training space after the installation and carry out the exercise of ball, this kind of changeable ball trainer of space size can be applied to football training, volleyball training, basketball training and some bobbles like the training of golf, baseball etc. and the use limitation is little, and the security is high, is suitable for extensive popularization.

The limiting protective net 3 can be a net (such as about 10 cm) with a large net empty space, and also can be a net with small meshes (such as about 1 cm), when the limiting protective net 3 with the small meshes is used, the telescopic connecting frame 4 cannot penetrate into the meshes, and at the moment, the ring buckle is used for fixing the limiting protective net 3 and the telescopic connecting frame 4 at the corresponding place.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and the present invention shall be covered by the claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A ball training device with variable space size, comprising:

the movable platform (1) comprises a plurality of platform single bodies (11) which are detachably connected with each other;

a plurality of supporting components (2) are arranged around the outer side of the movable platform (1);

the limiting protective net (3) is connected with the supporting component (2);

the telescopic connection frame (4) is connected with the limiting protection net (3), a plurality of telescopic connection frame (4) is arranged, and the telescopic connection frame (4) is arranged between the two adjacent supporting assemblies (2) and corresponds to the two supporting assemblies (2) in a detachable mode.

2. A variable-size ball training device according to claim 1, wherein any one of said support members (2) comprises:

a stabilizing support (21) for supporting on the ground;

a support cylinder (22) with one end connected with the stabilizing bracket (21);

the telescopic sliding rod (23) is connected with the supporting cylinder (22) in a sliding manner and is arranged at the other end of the supporting cylinder (22);

and the first fastener (24) is simultaneously connected with the telescopic slide rod (23) and the support cylinder (22) and is used for fixing the telescopic slide rod (23) on the support cylinder (22).

3. A variable-size ball training device according to claim 2, wherein the stabilizing bracket (21) comprises:

the supporting seat (211) is connected with the supporting cylinder (22);

the adjusting seat (212) is connected with the supporting cylinder (22) in a sliding manner;

a second fastening member (213) connected to the adjusting seat (212) and the support cylinder (22), the second fastening member (213) extending through the adjusting seat (212) and abutting against the support cylinder (22);

the support group (214) is hinged to the supporting seat (211) and the adjusting seat (212), and a plurality of support groups (214) are arranged along the circumferential direction of the supporting seat (211).

4. A space-size-variable ball training device as claimed in claim 3, characterized in that said platform unit (11) is of a rectangular structure, and a plurality of said platform units (11) are arranged side by side along the length and width directions of said platform unit (11), respectively; the movable platform (1) is of a rectangular structure; four support groups (214) are arranged at equal intervals along the circumferential direction of the support seat (211), and the stabilizing supports (21) are of a cross structure; the two collinear support groups (214) are parallel to one edge of a right angle on the movable platform (1), and the other two collinear support groups (214) are parallel to the other edge of the right angle on the movable platform (1); the supporting cylinder (22) is arranged close to the vertex of a right angle on the movable platform (1).

5. A space-size-variable ball training device according to any one of claims 1-4, wherein said supporting members (2) are four and are sequentially named as a first supporting group (251), a second supporting group (252), a third supporting group (253) and a fourth supporting group (254) along the edge of said movable platform (1), two said telescopic links (4) are arranged between said first supporting group (251) and said second supporting group (252), and two said telescopic links (4) are respectively arranged at two ends of said first supporting group (251).

6. A space-size-variable ball training device according to claim 5, characterized in that the telescopic connecting frame (4) is arranged between the first support group (251) and the fourth support group (254) at the end far from the ground, and the telescopic connecting frame (4) is arranged between the second support group (252) and the third support group (253) at the end far from the ground; or/and any telescopic connecting frame (4) is horizontally arranged.

7. A space-size-variable ball training device according to claim 1, wherein both ends of any one of said telescopic links (4) are detachably connected with connecting fasteners (5), and said connecting fasteners (5) are detachably connected with said supporting member (2).