CN112774147B - Tennis ball collecting device for tennis court - Google Patents
Tennis ball collecting device for tennis court Download PDFInfo
- Publication number
- CN112774147B CN112774147B CN202110219680.6A CN202110219680A CN112774147B CN 112774147 B CN112774147 B CN 112774147B CN 202110219680 A CN202110219680 A CN 202110219680A CN 112774147 B CN112774147 B CN 112774147B
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- ball
- side plate
- tennis
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B47/00—Devices for handling or treating balls, e.g. for holding or carrying balls
- A63B47/02—Devices for handling or treating balls, e.g. for holding or carrying balls for picking-up or collecting
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B47/00—Devices for handling or treating balls, e.g. for holding or carrying balls
- A63B47/04—Devices for handling or treating balls, e.g. for holding or carrying balls for cleaning balls
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Refuse Collection And Transfer (AREA)
Abstract
The invention relates to a tennis ball collecting device for a tennis court, which effectively solves the problems that tennis balls near a blocking net are inconvenient to pick up and the training is influenced by picking up the tennis balls; the technical scheme for solving the problem is that the device comprises a flat car, wherein two side plates are arranged on the flat car, a scroll is arranged between the two side plates, a conveying belt is arranged on the scroll, and a magic tape is arranged on the upper end surface of the conveying belt; a ball receiving device is arranged between the two side plates and comprises two support rings, a ball receiving hopper is fixed between the two support rings, a rotating shaft in the front-back direction is installed in the ball receiving hopper, and a plurality of ball stirring sheets are uniformly distributed on the circumference of the rotating shaft; a bottom plate is fixed between the front support ring and the rear support ring, a box body is arranged above the bottom plate, the upper side and the front side of the box body are in an open shape, and a through hole is formed in the side wall of the box body; the box body can reciprocate left and right; the bottom of the box body is provided with a plurality of vertical guide rods, and the guide rods can move up and down and reset downwards; the box body moves left and right to drive the guide rods to move up and down, and the non-inductive ball picking and cleaning device is non-inductive.
Description
Technical Field
The invention relates to the field of sports training, in particular to a tennis ball collecting device for a tennis court.
Background
When tennis is performed, the tennis is often picked up manually due to a large field, and particularly, when tennis training is performed, a pitching machine is needed to perform fixed-point mass training. Especially when practicing controlling the spacing between tennis balls and the barrier, a large number of tennis balls are blocked by the barrier in the middle and fall near the barrier. The traditional ball picking machine generally adopts a hand-push type machine to pick balls, the machine is large in size and inconvenient to push, and the ball picking machine is operated near a block net, so that a movable part at the bottom of the ball picking machine can scratch the block net easily.
On the other hand, when the number of tennis balls is insufficient and the tennis balls need to be picked up in the training process, the training needs to be stopped, so that the training is interrupted, the hand feeling of the player is influenced, and the training effect is poor; meanwhile, in an outdoor place, dust floats on the ground and can adhere to the surface of the tennis ball, and if the tennis ball is not cleaned in time, dust can be generated at the moment of hitting the tennis ball and is sucked by athletes, so that physical and psychological health is affected.
Disclosure of Invention
In view of the above situation, in order to solve the problems in the prior art, the invention aims to provide a tennis ball collecting device for a tennis court, which can effectively solve the problems that tennis balls near a blocking net are inconvenient to pick up and the training is affected by picking up the tennis balls.
The technical scheme for solving the problem is that the device comprises a flat car, wherein a front side plate and a rear side plate are arranged on the flat car, a scroll is arranged between the front side plate and the rear side plate, a conveying belt is wound on the scroll, and a magic tape is arranged on the upper end surface of the conveying belt; a plurality of reversing rods in the front and back directions are arranged between the front side plate and the back side plate, and the free end of the conveying belt extends out of the left side after being reversed by the reversing rods;
a ball catching device is arranged between the front side plate and the rear side plate and is positioned right below the highest turning point of the conveyer belt; the ball receiving device comprises two support rings fixed on the front side plate and the rear side plate, and a ball outlet corresponding to the support rings is formed in the side plate in front of the ball receiving device; a ball receiving hopper is fixed between the two support rings, a rotating shaft in the front-back direction is arranged in the ball receiving hopper, and a plurality of ball poking sheets are uniformly distributed on the circumference of the rotating shaft; a bottom plate is fixed between the front support ring and the rear support ring, a box body is arranged above the bottom plate, the upper side and the front side of the box body are in an open shape, and a through hole is formed in the side wall of the box body; the box body can reciprocate left and right; the bottom of the box body is provided with a plurality of vertical guide rods, and the guide rods can move up and down and reset downwards; the box body moves left and right to drive the guide rods to move up and down;
a cleaning device is arranged below the ball receiving device and comprises a transmission shaft in the front-back direction, and a front section and a rear section of bidirectional screw rods are arranged on the transmission shaft; the front and the rear two-way screw rods are respectively provided with a nut, each nut is hinged with a cleaning rod, and the free ends of the front and the rear cleaning rods are hinged together.
In order to save the magic tape, the magic tape is transversely and longitudinally arranged on the conveyor belt in a staggered manner.
In order to conveniently realize the left-right reciprocating movement of the box body, support rods penetrating through the support rings are fixed on the left side and the right side of the box body, a spherical body is fixed at the end part of the support rod on one side, and a pressure spring positioned between the box body and the support rings is sleeved on each support rod; the outer side of the support ring is sleeved with a gear ring, and wedge blocks are uniformly distributed on the circumference of the inner edge surface of the gear ring; the gear ring can extrude the spherical body at the end part of the support rod through the wedge-shaped block in a rotating way.
In order to enable the box body to move left and right, a plurality of protruding strips in the front-back direction are fixed above the bottom of the guide rod which moves up and down; the lower end of each guide rod is contacted with the bottom plate.
In order to adjust the tightness degree of the winding of the conveyer belt on the reel, a tension wheel for pressing the reel is arranged on the flat car.
In order to conveniently realize the driving of each part, a motor is arranged on the flat car and drives a reel to rotate through a belt and a belt pulley; an intermediate gear is arranged between the front side plate and the rear side plate through a shaft, a pinion is arranged at the end part of the transmission shaft, the intermediate gear is driven by a motor to rotate, and the intermediate gear is simultaneously meshed with the gear ring and the pinion; and the end part of the rotating shaft is also provided with a gear meshed with the gear ring.
In order to facilitate cleaning, the cleaning rod is a solid soft rod, and brushes are uniformly distributed on the outer edge surface of the solid soft rod; a sliding rail in the front-back direction is arranged between the front side plate and the back side plate, and bulges arranged in the sliding rail are arranged on the front nut and the back nut.
In order to clean the lower end face of the conveying belt, a rolling brush rotating with the transmission shaft is arranged on the lower end face of the conveying belt.
The tennis ball picking device can automatically pick up and clean tennis balls under the condition of not invading a field; the work efficiency is improved, and the training continuity is not interrupted.
Drawings
Fig. 1 is a front view of the present invention.
FIG. 2 is a front sectional view of the present invention.
Fig. 3 is a perspective view of the ash ejecting device of the present invention.
Fig. 4 is a cross-sectional view taken along line a-a of fig. 2.
Fig. 5 is a diagram showing a state of use in which the present invention is placed on a field.
Detailed Description
The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1 to 5, the invention comprises a flat car 1, wherein a front side plate and a rear side plate 2 are arranged on the flat car 1, a scroll 3 is arranged between the front side plate and the rear side plate 2, a conveying belt 4 is wound on the scroll 3, and a magic tape 8 is arranged on the upper end surface of the conveying belt 4; a plurality of reversing rods 5 in the front and back directions are arranged between the front side plate 2 and the back side plate 2, and the free end of the conveying belt 4 extends out from the left side after being reversed by the reversing rods 5;
a ball receiving device 6 is arranged between the front side plate 2 and the rear side plate 2, and the ball receiving device 6 is positioned right below the highest turning point of the conveyer belt 4; the ball receiving device 6 comprises two support rings 601 fixed on the front side plate 2 and the rear side plate 2, and a ball outlet 602 corresponding to the support rings 601 is arranged on the front side plate 2; a ball receiving hopper 603 is fixed between the two support rings 601, a rotating shaft 604 in the front-back direction is installed in the ball receiving hopper 603, and a plurality of ball poking sheets 605 are uniformly distributed on the circumference of the rotating shaft 604; a bottom plate 606 is fixed between the front support ring 601 and the rear support ring 601, a box body 607 is arranged above the bottom plate 606, the upper side and the front side of the box body 607 are open, and a through hole 608 is formed in the side wall of the box body 607; the box 607 can reciprocate from side to side; the bottom of the box 607 is provided with a plurality of vertical guide rods 609, and the guide rods 609 can move up and down and reset downwards; the box 607 can move left and right to drive the guide rods 609 to move up and down;
a cleaning device 7 is arranged below the ball receiving device 6, the cleaning device 7 comprises a transmission shaft 701 in the front-back direction, and a front-back two-way screw rod is arranged on the transmission shaft 701; nuts 702 are arranged on the front and rear two-way screw rods, each nut 702 is hinged with a cleaning rod 703, and the free ends of the front and rear cleaning rods 703 are hinged together.
In order to save the magic tape 8, the magic tape 8 is arranged on the conveying belt 4 in a transversely and longitudinally staggered manner.
In order to facilitate the left-right reciprocating movement of the box 607, support rods 610 penetrating through the support rings 601 are fixed on the left side and the right side of the box 607, a spherical body is fixed at the end part of the support rod 610 on one side, and a pressure spring positioned between the box 607 and the support rings 601 is sleeved on each support rod 610; a gear ring 611 is sleeved on the outer side of the support ring 601, and wedge-shaped blocks 612 are uniformly distributed on the circumference of the inner edge surface of the gear ring 611; the ring gear 611 rotates to press the ball at the end of the support rod 610 through the wedge block 612.
In order to move the box 607 to the left and right, a plurality of front and rear direction protruding bars 613 are fixed above the bottom of the guide rod 609 which moves up and down; the lower end of each guide 609 is in contact with the bottom plate 606.
In order to adjust the tightness degree of the winding of the conveyer belt 4 on the reel 3, a tension wheel 9 for pressing the reel 3 is arranged on the flat car 1.
In order to conveniently drive all the components, a motor 10 is arranged on the flat car 1, and the motor 10 drives the reel 3 to rotate through a belt and a belt pulley; an intermediate gear 11 is arranged between the front side plate 2 and the rear side plate 2 through a shaft, a pinion 12 is arranged at the end part of the transmission shaft 701, the intermediate gear 11 is driven by a motor 10 to rotate, and the intermediate gear 11 is simultaneously meshed with the gear ring 611 and the pinion 12; and a gear engaged with the ring gear 611 is also mounted to the end of the rotating shaft 604.
For convenience of cleaning, the cleaning rod 703 is a solid soft rod, and brushes are uniformly distributed on the outer edge surface of the solid soft rod; a sliding rail 704 in the front-rear direction is installed between the front and rear side plates 2, and a protrusion arranged in the sliding rail 704 is arranged on the front and rear nuts 702.
In order to clean the lower end surface of the conveyor belt 4, the lower end surface of the conveyor belt 4 is provided with a rolling brush 705 rotating with the transmission shaft 701.
When the device is used, the device is moved to the middle position of a field, then the conveyer belt 4 is pulled out, and the device is paved along the blocking net of the field in the same direction and is generally paved on one side of a hitting ball; if the number of the devices is large, a plurality of devices can be used for paving the two sides of the blocking net and the end parts of the field; see fig. 5.
Because the upper end surface of the conveyer belt 4 is arranged on the magic tape 8, one side of the magic tape 8 of the conveyer belt 4 after being laid is placed upwards; the conveyer belt 4 is longer, so that the whole field can be covered with the conveyer belt; meanwhile, the conveyor belt 4 after being laid flatly does not occupy the space of the field like a carpet.
When a player trains, tennis balls hit on the blocking net can fall on the conveying belt 4 under the blocking effect of the blocking net, and due to the fact that the magic tape 8 is arranged on the conveying belt 4 and the surface of the tennis balls is in a fur shape due to the characteristics of the tennis balls, the tennis balls can be adhered by the magic tape 8, and the tennis balls are prevented from rolling and are limited on the conveying belt 4.
Meanwhile, for tennis balls which do not fall on the conveyer belt 4, the tennis balls can be hit on the conveyer belt 4 by using a racket or feet, so that the tennis balls are captured by the magic tapes 8 on the conveyer belt 4.
After a period of time, the number of tennis balls on the conveyer belt 4 increases, and when the number of tennis balls in the serve machine is insufficient, the motor 10 can be started to collect the tennis balls.
When collecting tennis balls, a basket is placed in the ball outlet 602 of the tennis apparatus in advance to contain the tennis balls.
After the motor 10 is started, the motor 10 drives the reel 3, the gear ring 611, the rotating shaft 604, the transmission shaft 701 and the rolling brush 705 to synchronously rotate.
After the reel 3 rotates, the conveyer belt 4 on the reel 3 is wound on the reel 3 at the moment, namely the conveyer belt 4 starts to be recovered; due to the design of the plurality of reversing rods 5, when a high point is arranged inside the conveying belt 4, and the high point is a turning point; meanwhile, since the ball catching device 6 is located right below the position, when tennis balls enter the device along with the conveyer belt 4, the tennis ball on the conveyer belt 4 is scraped down by the ball pushing sheet 605 located inside the ball catching hopper 603 and the tennis balls fall into the ball catching hopper 603; and rolls down along the ball receiving bucket 603; and enters the inside of the case 607 opened at both the front side and the upper side.
As the gear ring 611 rotates, the wedge-shaped block 612 on the inner edge surface of the gear ring 611 continuously presses the spherical body at the end of the support rod 610 on the box 607 and is matched with the pressure spring sleeved on the support rod 610, so that the box 607 has a tendency of reciprocating left and right; and because the bottom plate 606 is fixed, when the box 607 reciprocates left and right, the protruding strips 613 on the bottom plate 606 also press the guide rods 609 penetrating through the lower side plate 2 of the box 607; thus enabling the guide rod 609 to exhibit a tendency to reciprocate up and down.
Therefore, when tennis balls enter the box 607 from the ball catching hopper 603, the tennis balls swing left and right along with the box 607 and reciprocate up and down on the guide rod 609 on the lower side plate 2 of the box 607; the tennis ball can be hit fully in the box 607; the tennis ball is beaten by beating the tennis ball by utilizing the characteristic of good elasticity of the tennis ball, so that the dust on the surface of the tennis ball is knocked down, and the tennis ball is simply cleaned. And the generated dust is dissipated from the through hole 608 formed in the sidewall of the housing 607.
In practical use, the rear side of the device can be lifted; the device is tilted forward, and as the tennis ball is continuously beaten, the tennis ball gradually approaches the ball outlet 602, and falls out of the ball outlet 602 and is collected.
Meanwhile, a cleaning device 7 is arranged below the ball catching device 6; with the rotation of the transmission shaft 701, two sections of bidirectional screw rods arranged on the transmission shaft 701 can rotate, so that the two nuts 702 synchronously and reversely move back and forth in a reciprocating manner; then the front and the rear cleaning rods 703 can present a trend of combining one by one, so that the brush on the cleaning rods 703 cleans the magic tapes 8 on the conveyer belt 4, and the magic tapes 8 are prevented from adhering sundries; meanwhile, the two cleaning rods 703 are V-shaped and are continuously opened and closed, so that sundries on the conveying belt 4 can be pushed away to two sides and separated from the conveying belt 4; meanwhile, the other side of the conveying belt 4 is cleaned by the rolling brush 705; the cleaned conveyor belt 4 is finally wound on the reel 3.
In the whole tennis ball collecting and cleaning process, manual intervention is completely not needed, and tennis balls are automatically collected and cleaned; meanwhile, only the flat conveying belt 4 moves in the field, so that the whole field can be normally used; the personnel picking up the ball do not need to enter the inside of the field, and the whole training is not influenced; interruption of training is avoided; meanwhile, tennis balls can be collected and supplemented in time, and the pitching machine can work continuously conveniently.
In addition, the device is paved on two sides or one side of the barrier net, so that the device is not influenced by the barrier net in the moving process; can realize the non-inductive ball picking.
The device can be placed on two sides of the blocking net and can be reasonably distributed according to the change of the training form; when the edge ball needs to be exercised, the conveyer belt 4 can be laid at the sideline; when the fixed point is required to be connected, the conveyer belt 4 can be laid at the fixed point, and not only can be used as an identifier, but also automatic collection of tennis balls can be realized.
After the tennis ball collecting device is laid, the tennis ball is long in length, tennis balls which do not fall on the conveying belt 4 can be kicked and beaten, and the like, so that the tennis balls can conveniently fall on the conveying belt 4 to be collected.
This device through the rocking of box 607 and reciprocating of guide arm 609, pat the tennis, through making the tennis beat a lot of in box 607 inside, make the dust on tennis surface can be patted totally, avoid the big influence use of tennis dust.
In this device, through utilizing two modes that are the opening and closing of the cleaning rod 703 of "V" type to clear up magic subsides 8, can be with the magic subsides 8 on be stained with timely outside promotion of attached debris, break away from conveyer belt 4, improved the efficiency of clearance, avoided magic subsides 8 insensitive.
Claims (7)
1. A tennis court tennis ball collecting device comprises a flat car (1), and is characterized in that the flat car (1) is provided with a front side plate and a rear side plate (2), a scroll (3) is arranged between the front side plate and the rear side plate (2), a conveyer belt (4) is wound on the scroll (3), and a magic tape (8) is arranged on the upper end surface of the conveyer belt (4); a plurality of reversing rods (5) in the front and back directions are arranged between the front side plate and the back side plate (2), and the free end of the conveying belt (4) is reversed by the reversing rods (5) and then extends out from the left side;
a ball catching device (6) is arranged between the front side plate (2) and the rear side plate (2), and the ball catching device (6) is positioned right below the highest turning point of the conveyer belt (4); the ball receiving device (6) comprises two support rings (601) fixed on the front side plate (2) and the rear side plate (2), and a ball outlet (602) corresponding to the support rings (601) is formed in the side plate (2) positioned in front; a ball receiving hopper (603) is fixed between the two support rings (601), a rotating shaft (604) in the front-back direction is installed in the ball receiving hopper (603), and a plurality of ball poking sheets (605) are uniformly distributed on the circumference of the rotating shaft (604); a bottom plate (606) is fixed between the front support ring (601) and the rear support ring (601), a box body (607) is arranged above the bottom plate (606), the upper side and the front side of the box body (607) are open, and a through hole (608) is formed in the side wall of the box body (607); the box body (607) can reciprocate left and right; the bottom of the box body (607) is provided with a plurality of vertical guide rods (609), and the guide rods (609) can move up and down and reset downwards; the box body (607) moves left and right to drive the guide rods (609) to move up and down;
a cleaning device (7) is arranged below the ball receiving device (6), the cleaning device (7) comprises a transmission shaft (701) in the front-back direction, and a front section and a rear section of bidirectional screw rods are arranged on the transmission shaft (701); nuts (702) are arranged on the front and rear two-way screw rods, each nut (702) is hinged with a cleaning rod (703), and the free ends of the front and rear cleaning rods (703) are hinged together;
a plurality of protruding strips (613) in the front-back direction are fixed above the bottom; the lower end of each guide rod (609) is in contact with the bottom plate (606).
2. A tennis court tennis collection device as defined in claim 1, wherein said Velcro strips (8) are arranged on the conveyor belt (4) in a staggered manner.
3. The tennis court tennis ball collecting device as claimed in claim 1, wherein the box (607) is fixed at left and right sides with support rods (610) penetrating through the support ring (601), wherein a spheroid is fixed at the end of the support rod (610) at one side, and each support rod (610) is sleeved with a pressure spring between the box (607) and the support ring (601); a gear ring (611) is sleeved on the outer side of the support ring (601), and wedge blocks (612) are uniformly distributed on the circumference of the inner edge surface of the gear ring (611); the gear ring (611) rotates to press the ball at the end of the support rod (610) through the wedge block (612).
4. A tennis court tennis collection apparatus as defined in claim 1, wherein said platform cart (1) is provided with a tension wheel (9) for pressing against the reel (3).
5. A tennis court tennis ball collection device as defined in claim 1, wherein the platform cart (1) is provided with a motor (10), and the motor (10) drives the reel (3) to rotate through a belt and a belt pulley; an intermediate gear (11) is arranged between the front side plate and the rear side plate (2) through a shaft, a pinion (12) is arranged at the end part of the transmission shaft (701), the intermediate gear (11) is driven by a motor (10) to rotate, and the intermediate gear (11) is simultaneously meshed with the gear ring (611) and the pinion (12); meanwhile, a gear meshed with the gear ring (611) is also arranged at the end part of the rotating shaft (604).
6. The tennis court tennis ball collecting device as claimed in claim 1, wherein the sweeping rod (703) is a solid soft rod, and brushes are uniformly distributed on the outer edge surface of the solid soft rod; a sliding rail (704) in the front-back direction is arranged between the front side plate and the rear side plate (2), and bulges arranged in the sliding rail (704) are arranged on the front nut and the rear nut (702).
7. A tennis court tennis ball collection device as defined in claim 1, wherein the lower end surface of the conveyor belt (4) is provided with a rolling brush (705) rotating with the drive shaft (701).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110219680.6A CN112774147B (en) | 2021-02-27 | 2021-02-27 | Tennis ball collecting device for tennis court |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110219680.6A CN112774147B (en) | 2021-02-27 | 2021-02-27 | Tennis ball collecting device for tennis court |
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| Publication Number | Publication Date |
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| CN112774147A CN112774147A (en) | 2021-05-11 |
| CN112774147B true CN112774147B (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110219680.6A Active CN112774147B (en) | 2021-02-27 | 2021-02-27 | Tennis ball collecting device for tennis court |
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| CN (1) | CN112774147B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203564732U (en) * | 2013-12-04 | 2014-04-30 | 齐齐哈尔大学 | Tennis ball picking device |
| CN203777621U (en) * | 2014-03-21 | 2014-08-20 | 沈阳工业大学 | Remotely-controlled portable tennis ball picking machine |
| CN204092978U (en) * | 2014-10-03 | 2015-01-14 | 何华琼 | Wrap-up ball of picking up pastes |
| CN206535100U (en) * | 2017-01-17 | 2017-10-03 | 肖懿珂 | Tennis picks up ball cleaning all-in-one |
| CN108786042A (en) * | 2018-08-21 | 2018-11-13 | 华南理工大学 | A kind of tennis accommodating mechanism and accommodation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9339698B2 (en) * | 2013-06-21 | 2016-05-17 | Tiffany Tong Zhang | Tennis bag with ball retrieving and dispensing unit |
-
2021
- 2021-02-27 CN CN202110219680.6A patent/CN112774147B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203564732U (en) * | 2013-12-04 | 2014-04-30 | 齐齐哈尔大学 | Tennis ball picking device |
| CN203777621U (en) * | 2014-03-21 | 2014-08-20 | 沈阳工业大学 | Remotely-controlled portable tennis ball picking machine |
| CN204092978U (en) * | 2014-10-03 | 2015-01-14 | 何华琼 | Wrap-up ball of picking up pastes |
| CN206535100U (en) * | 2017-01-17 | 2017-10-03 | 肖懿珂 | Tennis picks up ball cleaning all-in-one |
| CN108786042A (en) * | 2018-08-21 | 2018-11-13 | 华南理工大学 | A kind of tennis accommodating mechanism and accommodation method |
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| CN112774147A (en) | 2021-05-11 |
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Effective date of registration: 20211019 Address after: 276300 in the Management Committee of Yinan Economic Development Zone, Linyi City, Shandong Province Applicant after: Shandong Yinan park development and Construction Co.,Ltd. Address before: 450053 No.2, Yinhe street, Huiji District, Zhengzhou City, Henan Province Applicant before: PHYSICAL EDUCATION COLLEGE OF ZHENGZHOU University |
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