CN111298416A - Automatic basketball serving device - Google Patents
Automatic basketball serving device Download PDFInfo
- Publication number
- CN111298416A CN111298416A CN202010144741.2A CN202010144741A CN111298416A CN 111298416 A CN111298416 A CN 111298416A CN 202010144741 A CN202010144741 A CN 202010144741A CN 111298416 A CN111298416 A CN 111298416A
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- ball
- serving
- ball collecting
- basketball
- automatic
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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
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
- A63B69/407—Stationarily-arranged devices for projecting balls or other bodies with spring-loaded propelling means
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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
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/0071—Training appliances or apparatus for special sports for basketball
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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
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0605—Decision makers and devices using detection means facilitating arbitration
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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
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/17—Counting, e.g. counting periodical movements, revolutions or cycles, or including further data processing to determine distances or speed
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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
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/80—Special sensors, transducers or devices therefor
- A63B2220/805—Optical or opto-electronic sensors
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/80—Special sensors, transducers or devices therefor
- A63B2220/83—Special sensors, transducers or devices therefor characterised by the position of the sensor
- A63B2220/833—Sensors arranged on the exercise apparatus or sports implement
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Toys (AREA)
Abstract
The invention discloses an automatic basketball serving device, and belongs to the technical field of serving equipment. The automatic ball serving mechanism of the ball serving device comprises a ball serving channel, an electromagnet in the ball serving channel is fixed on the left side wall of the ball serving channel, a blocking piece is fixedly connected with the inner wall of the ball serving channel, an iron component is arranged on one side, close to the electromagnet, of the blocking piece, one end of a connecting rod is fixedly connected with the iron component, the other end of the connecting rod penetrates through a through hole formed in the blocking piece to be connected with a ball pushing component, a spring is further sleeved outside the connecting rod between the blocking piece and the ball pushing component, and the electromagnet is electrically connected with a power supply through a controller; the ball collecting device is arranged above the ball serving channel. The ball serving device can accurately deliver the ball to the hands of a trainer, improves the training efficiency, skillfully utilizes the lever principle to adjust the ball serving angle by utilizing the impulsive force of the falling ball, meets the requirement of high difficulty in training, and counts the training result.
Description
Technical Field
The invention relates to the technical field of serving equipment, in particular to an automatic basketball serving device.
Background
Shooting is the main attack technique of basketball motion, and is the important link of constitution tactics, improve shooting skill and can effectively improve shooting hit rate and shooting stability, and shooting skill can only be promoted gradually through a large amount of shooting training, traditional shooting training is all accomplished by coach or training carry out artifical pass, along with the extension of training time, the physical power of training mate or coach descends, the quality of pass can not obtain the assurance, consequently workman passes the unsuitable long-time shooting training demand, consequently can replace artifical full-automatic service device and take place.
The most common wheeled service robot among the prior art is by motor drive friction pulley, because the passageway space of dress wheel is less than the basketball diameter, when the ball slided into the passageway from the track, the wheel extruded the ball then launches the ball, and this kind of service mode causes the extrusion to the ball, and the wearing and tearing of ball are great, and the basketball takes place to warp easily after long-time extrusion service.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides an automatic basketball serving device.
The invention provides an automatic basketball serving device, which comprises an automatic basketball serving mechanism and a basketball collecting device, wherein the automatic basketball serving mechanism comprises a basketball serving channel, an electromagnet, a blocking piece, a basketball pushing component and a basketball outlet are sequentially arranged in the basketball serving channel from left to right, the electromagnet is fixed on the left side wall of the basketball serving channel, the blocking piece is fixedly connected with the inner wall of the basketball serving channel, an iron component is arranged on one side, close to the electromagnet, of the blocking piece, the iron component is connected with a connecting rod, one end of the connecting rod is fixedly connected with the iron component, the other end of the connecting rod penetrates through a through hole formed in the blocking piece and is fixedly connected with the basketball pushing component, a spring is further sleeved outside the connecting rod between the blocking piece and the basketball pushing component, and the electromagnet is electrically connected with;
the ball collecting device is arranged above the ball serving channel and used for conveying the basketball to a position between the ball pushing component and the ball outlet.
Preferably, collection ball device includes first collection ball net, first collection ball section of thick bamboo, second collection ball section of thick bamboo, spheroid is thrown mouth and second collection ball net, first collection ball net is connected with the shooting ring on the backboard and is used for accepting the ball of throwing, the top of first collection ball section of thick bamboo and the bottom intercommunication of first collection ball net, the bottom and the second collection ball section of thick bamboo intercommunication of first collection ball section of thick bamboo, the spheroid is thrown the mouth and is established on the lateral wall of second collection ball section of thick bamboo, and second collection ball section of thick bamboo passes through second collection ball net with the passageway of serving.
Preferably, a first infrared counting unit used for counting the number of hit balls is arranged in the first ball collecting barrel, a second infrared counting unit used for counting the total number of sent balls is arranged in the second ball collecting barrel, the second infrared counting unit is arranged in the second ball collecting barrel and located below the ball throwing port, and the first infrared counting unit and the second infrared counting unit are electrically connected with the controller.
Preferably, a ball inlet is arranged above the ball serving channel, the second ball collecting net is connected with the ball inlet, and the second infrared counting unit is arranged at the ball inlet.
Preferably, the outer shell is arranged outside the service passage, a through hole for the second ball collecting barrel to pass through is formed above the outer shell, the service passage is hinged to the outer shell through a connecting piece, and the traveling mechanism is arranged at the bottom of the outer shell and connected with the outer shell through a rotating mechanism.
Preferably, a longitudinal opening is formed in the side face of the second ball collecting barrel, a pressing plate is arranged in the outer shell, the pressing plate is hinged to the outer shell, a hinged joint is located between two ends of the pressing plate, one end of the pressing plate penetrates through the longitudinal opening to enter the second ball collecting barrel, the other end of the pressing plate is fixedly connected with one end of the L-shaped connecting rod, and the other end of the L-shaped connecting rod is hinged to the ball serving channel.
Preferably, the ball pushing member is slidably connected to the inner wall of the ball serving channel.
Compared with the prior art, the invention has the beneficial effects that: the automatic ball serving device can realize high-quality ball passing on the premise of no damage to the ball, can accurately pass the ball to the hands of a trainer, improves the training efficiency, skillfully utilizes the lever principle to adjust the ball serving angle by utilizing the impulsive force of the falling ball, meets the requirement of high-difficulty training, can count the total number of the ball served and the number of the hit balls so as to count the hit rate, and displays the training result every time so as to track and evaluate the training effect.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic structural diagram of embodiment 3 of the present invention;
fig. 3 is a schematic structural view of the service passage of the present invention.
Description of reference numerals:
1. the automatic ball serving device comprises an automatic ball serving mechanism, 11 ball serving channels, 12 electromagnets, 13 blocking pieces, 14 ball pushing components, 2 traveling mechanisms, 3 ball collecting devices, 31 first ball collecting nets, 32 first ball collecting cylinders, 33 second ball collecting cylinders, 34 ball throwing openings, 35 second ball collecting nets, 4 iron components, 5 connecting rods, 6 springs, 7 ball inlet openings, 8 outer shells, 9 pressing plates and 10L-shaped connecting rods.
Detailed Description
Detailed description of the preferred embodimentsthe following detailed description of the present invention will be made with reference to the accompanying drawings 1-3, although it should be understood that the scope of the present invention is not limited to the specific embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
As shown in fig. 1 and 3, the present embodiment provides an automatic basketball serving device, which comprises an automatic basketball serving mechanism 1 and a basketball collecting device 3, the automatic ball serving mechanism 1 comprises a ball serving channel 11, an electromagnet 12, a blocking piece 13, a ball pushing component 14 and a ball outlet are sequentially arranged in the ball serving channel 11 from left to right, the electromagnet 12 is fixed on the left side wall of the ball serving channel 11, the blocking piece 13 is fixedly connected with the inner wall of the ball serving channel 11, the iron component 4 is arranged on one side of the blocking piece 13 close to the electromagnet 12, the iron member 4 is connected with a connecting rod 5, one end of the connecting rod 5 is fixedly connected with the iron member 4, the other end of the connecting rod 5 passes through a via hole arranged on the blocking piece 13 and is fixedly connected with a ball pushing member 14, a spring 6 is sleeved outside the connecting rod 5 between the blocking piece 13 and the ball pushing component 14, and the electromagnet 12 is electrically connected with a power supply through a controller;
the ball collecting device 3 is provided above the ball serving channel 11 for delivering the basketball between the ball pushing member 14 and the ball outlet. A ball outlet is provided on the right side wall of the service passage 11, and a ball pushing member 14 is provided for sending out a ball entering the service passage 11 from the ball inlet through the ball outlet.
In this embodiment, the automatic ball serving mechanism 1 has the following working principle: the ball collecting device 3 is used for collecting basketballs and conveying the basketballs into the ball serving channel 11, the controller controls the electromagnet 12 to be powered on and powered off intermittently, the ferrous member 4 moves towards the direction close to the electromagnet 12 under the attraction force of the electromagnet 12 when the electromagnet 12 is powered on and is adsorbed on the electromagnet 12, the ferrous member 4 is connected with the ball pushing member 14 through the connecting rod 5, so that the connecting rod 5 and the ball pushing member 14 fixed on the connecting rod 5 also move towards the electromagnet 12 in the moving process of the ferrous member 4, the electromagnet 12 is arranged at one end of the ball serving channel 11 far away from a ball outlet, therefore, after the ferrous member 4 is adsorbed on the electromagnet 12, the distance between the ball pushing member 14 and the ball outlet is maximum, the spring 6 on the connecting rod 5 between the blocking piece 13 and the ball pushing member 14 is in a compressed state, and when the basketballs fall into the ball serving channel 11, when the basketball is positioned between the ball pushing component 14 and the ball outlet, the electromagnet 12 is powered off, the ball pushing component 14 is reset under the action of the spring 6 and moves towards the direction close to the ball outlet, and the basketball between the ball pushing component 14 and the ball outlet is flicked, so that the automatic shooting of the basketball is completed. In the process, the basketball cannot generate external forces such as extrusion, friction and the like except for the thrust from the ball pushing component 14, so that compared with a wheel type service robot in the prior art, the basketball cannot deform and wear, is convenient to serve, and can replace manual passing to meet the requirements of a large number of shooting training.
Example 2
In order to facilitate the statistics of the total number of serve balls and the number of hit balls and realize the automatic control of the serve balls, the ball collecting device 3 comprises a first ball collecting net 31, a first ball collecting cylinder 32, a second ball collecting cylinder 33, a ball throwing port 34 and a second ball collecting net 35, wherein the first ball collecting net 31 is connected with a shooting ring on a backboard and used for receiving the thrown balls, the top of the first ball collecting cylinder 32 is communicated with the bottom of the first ball collecting net 31, the bottom of the first ball collecting cylinder 32 is communicated with the second ball collecting cylinder 33, the ball throwing port 34 is arranged on the outer side wall of the second ball collecting cylinder 33, and the second ball collecting cylinder 33 is connected with the serving channel 11 through the second ball collecting net 35;
be equipped with the first infrared ray count unit that is used for counting ball number of hits in first ball section of thick bamboo 32, be equipped with the second infrared ray count unit that is used for counting total service number in the second ball section of thick bamboo 33, and the second infrared ray count unit is established and is located spheroid input port 34 below department in second ball section of thick bamboo 33, first infrared ray count unit and second infrared ray count unit all are connected with the controller electricity.
First ball collecting net 31 is used for accepting the ball of throwing with the basketball hoop connection of backboard, first infrared technical unit is used for counting the number of hitting the ball, after the ball is thrown in mouthful 34 and is used for not throwing when the ball, throw into ball collecting device 3 from ball throwing mouthful 34 after picking up the ball, second infrared counting unit can count all balls that get into in service passageway 1 and count as total service number, and then calculate on this basis and locate the hit rate for show training result, the person of training of being convenient for carries out tactics adjustment.
Through a plurality of attempts, the inventor finds that as a preferable scheme, a ball inlet 7 is arranged above a ball serving channel 11, a second ball collecting net 35 is connected with the ball inlet 7, a second infrared counting unit is arranged at the ball inlet 7, when the second infrared counting unit is arranged at a position 40-45cm away from the bottom of the ball serving channel 11 and the horizontal distance between a ball pushing component 14 and the ball inlet is 30-40cm, effective shooting of a basketball can be realized, when the second infrared counting unit detects the basketball, a signal is sent to a controller, the controller controls the electromagnet 12 to be powered off, the ball pushing component 14 is reset to just hit the basketball entering the ball serving channel 11, the ball serving efficiency is improved, and the problems of ball blocking or ball miss serving caused by the fact that the ball does not enter the ball pushing component 14 of the ball serving channel to start to act are avoided.
Example 3
On embodiment 1's basis, the outside of service passageway 11 is equipped with shell body 8, the top of shell body 8 is equipped with the through-hole that supplies second ball section of thick bamboo 33 to pass, and service passageway 11 passes through the connecting piece and is articulated with shell body 8, and the bottom of shell body 8 is equipped with running gear 2, and running gear 2 passes through rotary mechanism and is connected with shell body 8. The rotating mechanism can be a motor which drives the rotating shaft to rotate, and the outer shell 8 is fixed on the rotating shaft and synchronously rotates along with the rotating shaft, so that the position change of the ball dispensing port is realized.
Example 4
As shown in fig. 2, on the basis of embodiment 1, a longitudinal opening is formed in a side surface of the second ball collecting barrel 33, a pressing plate 9 is arranged in the outer shell 8, the pressing plate 9 is hinged to the outer shell 8, a hinge point of the pressing plate 9 is located between two ends of the pressing plate 9, one end of the pressing plate 9 penetrates through the longitudinal opening to enter the second ball collecting barrel 33, the other end of the pressing plate 9 is fixedly connected with one end of an L-shaped connecting rod 10, and the other end of the L-shaped connecting rod 10 is hinged to the ball serving channel 11.
The basketball entering the ball collecting device 3 is a ball hit after shooting or a ball thrown from a ball throwing opening, the ball with a certain speed reaches the second ball collecting cylinder 33 under the action of gravity, firstly, the pressing plate 9 is hit, the pressing plate 9 is in a horizontal state under the normal condition by setting a load for the pressing plate 9, the pressing plate 9 is hinged on the outer shell 8, and a hinge point is positioned between two ends of the pressing plate 9, so the pressing plate 9 forms a lever structure, the end part of the pressing plate 9 positioned in the second ball collecting cylinder 33 is reduced under the action of the impulsive force of the basketball, and is reset after the ball passes through, the other end of the pressing plate 9 is also lifted and reset along with the pressing plate, and the end part of the pressing plate 9 is connected with the ball serving channel 1 through the L-shaped connecting rod, so the L-shaped connecting rod can also generate displacement change in a certain range, the angle of the ball sent out is changed.
Wherein the ball pushing member 14 is slidably connected to the inner wall of the ball launching channel 1.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an automatic device of serving of basketball, its characterized in that, including automatic mechanism of serving (1) and collection football shirt put (3), automatic mechanism of serving (1) is including serving passageway (11), be equipped with electro-magnet (12), block (13), push away ball component (14) and go out the ball mouth in proper order from the left hand right side in serving passageway (11), electro-magnet (12) are fixed on the left side wall of serving passageway (11), block the inner wall fixed connection of (13) and serving passageway (11), and one side that blocks (13) and be close to electro-magnet (12) is equipped with iron component (4), iron component (4) are connected with connecting rod (5), and the one end and the iron component (4) fixed connection of connecting rod (5), the other end of connecting rod (5) pass the via hole that is equipped with on blocking (13) and push away ball component (14) fixed connection, the outside of connecting rod (5) between blocking (13) and push away ball component (14) still overlaps and is equipped with the spring (6) The electromagnet (12) is electrically connected with a power supply through a controller; the ball collecting device (3) is arranged above the ball serving channel (11) and is used for conveying the basketball to a position between the ball pushing component (14) and the ball outlet.
2. The automatic basketball serving device as claimed in claim 1, characterized in that said ball collecting device (3) comprises a first ball collecting net (31), a first ball collecting cylinder (32), a second ball collecting cylinder (33), a ball putting opening (34) and a second ball collecting net (35), said first ball collecting net (31) is connected with a shooting ring on the backboard for receiving the ball being shot, the top of said first ball collecting cylinder (32) is communicated with the bottom of said first ball collecting net (31), the bottom of said first ball collecting cylinder (32) is communicated with said second ball collecting cylinder (33), said ball putting opening (34) is arranged on the outer side wall of said second ball collecting cylinder (33), said second ball collecting cylinder (33) is connected with said serving channel (11) through said second ball collecting net (35).
3. The automatic basketball serving device as claimed in claim 2, wherein a first infrared counting unit for counting the number of hit balls is provided in the first ball collecting barrel (32), a second infrared counting unit for counting the total number of hit balls is provided in the second ball collecting barrel (33), and the second infrared counting unit is provided in the second ball collecting barrel (33) below the ball putting opening (34), and both the first infrared counting unit and the second infrared counting unit are electrically connected with the controller.
4. The automatic basketball serving device as claimed in claim 3, wherein a ball inlet (7) is provided above said serving channel (11), a second ball collecting net (35) is connected to said ball inlet (7), and said second infrared counting unit is provided at said ball inlet (7).
5. The automatic basketball serving device as claimed in claim 1, characterized in that an outer shell (8) is arranged outside the serving channel (11), a through hole for the second ball collecting barrel (33) to pass through is arranged above the outer shell (8), the serving channel (11) is hinged with the outer shell (8) through a connecting piece, a walking mechanism (2) is arranged at the bottom of the outer shell (8), and the walking mechanism (2) is connected with the outer shell (8) through a rotating mechanism.
6. The automatic basketball serving device as claimed in claim 5, characterized in that the side of the second ball collecting barrel (33) is provided with a longitudinal opening, a pressing plate (9) is arranged in the outer shell (8), the pressing plate (9) is hinged with the outer shell (8) and the hinged point is located between two ends of the pressing plate (9), one end of the pressing plate (9) passes through the longitudinal opening to enter the second ball collecting barrel (33), the other end of the pressing plate (9) is fixedly connected with one end of the L-shaped connecting rod (10), and the other end of the L-shaped connecting rod (10) is hinged with the serving channel (11).
7. Basketball automatic serving device according to claim 1, characterized in that said pushing element (14) is slidingly connected to the inner wall of the serving channel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010144741.2A CN111298416B (en) | 2020-03-04 | 2020-03-04 | Automatic basketball serving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010144741.2A CN111298416B (en) | 2020-03-04 | 2020-03-04 | Automatic basketball serving device |
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| Publication Number | Publication Date |
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| CN111298416A true CN111298416A (en) | 2020-06-19 |
| CN111298416B CN111298416B (en) | 2021-05-14 |
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| CN202010144741.2A Active CN111298416B (en) | 2020-03-04 | 2020-03-04 | Automatic basketball serving device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112370761A (en) * | 2020-11-03 | 2021-02-19 | 西北民族大学 | Football launching device for Coriolis football device |
| CN112870662A (en) * | 2021-01-14 | 2021-06-01 | 湖南文理学院 | Formula basketball training is retrieved with launching service device to net interception |
| CN113209591A (en) * | 2021-05-11 | 2021-08-06 | 陆志骅 | Multistage intelligent tennis service robot that accelerates |
| CN114177591A (en) * | 2021-12-10 | 2022-03-15 | 甘肃农业大学 | Dribbling shooting training device for basketball teaching |
| CN114768218A (en) * | 2022-04-16 | 2022-07-22 | 青岛理工大学 | Basketball shooting training device |
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| CN103566573A (en) * | 2013-11-15 | 2014-02-12 | 兰州大学 | Automatic counting device based on comprehensive basketball shooting training system and counting method thereof |
| CN107088298A (en) * | 2017-06-13 | 2017-08-25 | 淄博职业学院 | A kind of shootaround system |
| US10182554B1 (en) * | 2017-02-16 | 2019-01-22 | Edwin Santiago | Ball-fetcher projection device |
| CN109603136A (en) * | 2018-12-20 | 2019-04-12 | 刘海龙 | A kind of table tennis ball serving device |
| CN209848283U (en) * | 2019-03-05 | 2019-12-27 | 乐山师范学院 | Angle-adjustable table tennis service robot |
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2020
- 2020-03-04 CN CN202010144741.2A patent/CN111298416B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103566573A (en) * | 2013-11-15 | 2014-02-12 | 兰州大学 | Automatic counting device based on comprehensive basketball shooting training system and counting method thereof |
| US10182554B1 (en) * | 2017-02-16 | 2019-01-22 | Edwin Santiago | Ball-fetcher projection device |
| CN107088298A (en) * | 2017-06-13 | 2017-08-25 | 淄博职业学院 | A kind of shootaround system |
| CN109603136A (en) * | 2018-12-20 | 2019-04-12 | 刘海龙 | A kind of table tennis ball serving device |
| CN209848283U (en) * | 2019-03-05 | 2019-12-27 | 乐山师范学院 | Angle-adjustable table tennis service robot |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112370761A (en) * | 2020-11-03 | 2021-02-19 | 西北民族大学 | Football launching device for Coriolis football device |
| CN112870662A (en) * | 2021-01-14 | 2021-06-01 | 湖南文理学院 | Formula basketball training is retrieved with launching service device to net interception |
| CN113209591A (en) * | 2021-05-11 | 2021-08-06 | 陆志骅 | Multistage intelligent tennis service robot that accelerates |
| CN114177591A (en) * | 2021-12-10 | 2022-03-15 | 甘肃农业大学 | Dribbling shooting training device for basketball teaching |
| CN114768218A (en) * | 2022-04-16 | 2022-07-22 | 青岛理工大学 | Basketball shooting training device |
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| CN111298416B (en) | 2021-05-14 |
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