CN108654032A - A kind of table tennis auxiliary training device - Google Patents

A kind of table tennis auxiliary training device Download PDF

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Publication number
CN108654032A
CN108654032A CN201810480806.3A CN201810480806A CN108654032A CN 108654032 A CN108654032 A CN 108654032A CN 201810480806 A CN201810480806 A CN 201810480806A CN 108654032 A CN108654032 A CN 108654032A
Authority
CN
China
Prior art keywords
desktop
montant
box body
racket
table tennis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810480806.3A
Other languages
Chinese (zh)
Inventor
李世军
王焕盛
李世珍
张迎军
刘衍勇
王汝尧
代坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong University of Science and Technology
Original Assignee
Shandong University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong University of Science and Technology filed Critical Shandong University of Science and Technology
Priority to CN201810480806.3A priority Critical patent/CN108654032A/en
Publication of CN108654032A publication Critical patent/CN108654032A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B67/00Sporting games or accessories therefor, not provided for in groups A63B1/00 - A63B65/00
    • A63B67/04Table games physically beneficial for the human body, modelled on outdoor sports, e.g. table tennis
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47BTABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B25/00Card tables; Tables for other games
    • A47B25/003Card tables; Tables for other games for table tennis
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00Training appliances or apparatus for special sports
    • A63B69/40Stationarily-arranged devices for projecting balls or other bodies
    • A63B69/409Stationarily-arranged devices for projecting balls or other bodies with pneumatic ball- or body-propelling means
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/06Indicating or scoring devices for games or players, or for other sports activities
    • A63B71/0619Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/06Indicating or scoring devices for games or players, or for other sports activities
    • A63B71/0619Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
    • A63B71/0622Visual, audio or audio-visual systems for entertaining, instructing or motivating the user
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/06Indicating or scoring devices for games or players, or for other sports activities
    • A63B71/0619Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
    • A63B2071/0647Visualisation of executed movements
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/16Table tennis
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00Measuring of physical parameters relating to sporting activity
    • A63B2220/17Counting, e.g. counting periodical movements, revolutions or cycles, or including further data processing to determine distances or speed
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00Measuring of physical parameters relating to sporting activity
    • A63B2220/50Force related parameters
    • A63B2220/56Pressure
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00Measuring of physical parameters relating to sporting activity
    • A63B2220/80Special sensors, transducers or devices therefor
    • A63B2220/806Video cameras

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Rehabilitation Tools (AREA)

Abstract

The invention discloses a kind of table tennis auxiliary training devices,Its structure includes desktop,Touch display screen,Racket storage pocket and racket,The bottom of the table is equipped with montant,The montant is fixedly connected with desktop,The montant side is equipped with cross bar,It is fixedly connected between the cross bar and montant,The montant lower part is equipped with damping base,The damping base is fixedly connected with montant,The desktop side is equipped with holder,The frame upper is equipped with touch display screen,The desktop surface is equipped with net,Racket storage pocket is equipped on the left of the desktop,The racket storage pocket is internally provided with racket,Support base is equipped on the right side of the desktop,The support base top is equipped with box body,The box body top is equipped with collection ball bucket,The collection ball bucket is fixedly connected with box body,The stone frog's egg harvester is simple in structure,It is easy to operate,The motion state that video camera records sportsman in real time is captured by the way that dynamic is arranged on service robot,Sportsman can be according to data point reuse motion state.

Description

A kind of table tennis auxiliary training device
Technical field
The present invention relates to sports equipment technical field, specially a kind of table tennis auxiliary training device.
Background technology
Table tennis is the national ball game of China, has a preferable basis civil, table tennis national team also on international market repeatly It produces excellent results.Usually when there are training ball for table tennis, two people is needed to carry out air exercise formula training, to improve sportsman the feel of the ball and Respond, but sometimes limited by condition, it cannot train, i.e., can only individually be instructed together there are two people regularly Practice.
Currently, sportsman, during carrying out table tennis training, general is difficult to find lacking for itself by repeating Sunken and weak link.Such as in practicing impact, sportsman strikes the table tennis sent out from service robot repeatedly, it is difficult to find The stroke imperfections and weak link of itself, not only bad for the promotion of motor skill, nor energy science Geostatistics analysis goes out Corresponding data.
Invention content
To achieve the above object, the present invention provides the following technical solutions:A kind of table tennis auxiliary training device, structure packet Desktop, touch display screen, racket storage pocket and racket are included, the bottom of the table is equipped with montant, and the montant is fixed with desktop to be connected It connecing, the montant side is equipped with cross bar, is fixedly connected between the cross bar and montant, and the montant lower part is equipped with damping base, The damping base is fixedly connected with montant, and the desktop side is equipped with holder, and the frame upper is equipped with touch display screen, institute It states desktop surface and is equipped with net, be equipped with racket storage pocket on the left of the desktop, the racket storage pocket is internally provided with racket, described Support base is equipped on the right side of desktop, the support base top is equipped with box body, and the box body top is equipped with collection ball bucket, the collection ball Bucket is fixedly connected with box body.
As a kind of preferred embodiment of the present invention, the support base is internally provided with motor, and the motor top is set There are connecting pole, the connecting pole to be fixedly connected with motor.
As a kind of preferred embodiment of the present invention, the tray interior is equipped with out bulb, it is described go out bulb bottom set Have a support column, it is described go out bulb on the right side of be equipped with air pump.
As a kind of preferred embodiment of the present invention, the box body bottom is equipped with rotary shaft, the rotary shaft and box body Rotation connection, the rotary shaft are fixedly connected with connecting pole.
As a kind of preferred embodiment of the present invention, the box body medial surface is equipped with dynamic and captures video camera, described dynamic State captures video camera and is electrically connected by conducting wire and touch display screen.
As a kind of preferred embodiment of the present invention, the racket top is equipped with upper ball plate, and the upper ball plate side is set There are handle, the grip surface to be equipped with display, the upper ball plate lower part is equipped with middle ball plate, and the middle ball plate lower part is equipped with lower ball Plate.
As a kind of preferred embodiment of the present invention, the middle ball plate side is equipped with middle ball plate handle, the middle ball plate Surface is equipped with diaphragm pressure inductor, and the middle ball plate grip surface is equipped with remote transmitter, the remote transmitter and touch Display screen is wirelessly connected.
Compared with prior art, beneficial effects of the present invention are as follows:
A kind of table tennis auxiliary training apparatus structure is simple, easy to operate, by installing service robot in one end of ball table, Emit table tennis to sportsman, video camera is captured by the dynamic installed on service robot, the athletic posture of sportsman is caught Record is caught, and is shown in touch display screen, sportsman can observe the motion state of oneself at any time, and device cooperation racket makes With the impact dynamics of sportsman can be recorded at any time by diaphragm pressure inductor by remote transmitter by being installed in racket, be shown Show in touch display screen, sportsman can be according to data point reuse motion state.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention, Objects and advantages will become more apparent upon:
Fig. 1 is a kind of overall structure diagram of table tennis auxiliary training device of the present invention;
Fig. 2 is a kind of internal structure schematic diagram of table tennis auxiliary training device of the present invention;
Fig. 3 is a kind of racket schematic internal view of table tennis auxiliary training device of the present invention.
In figure:Desktop -1, montant -2, damping base -3, net -4, touch display screen -5, racket storage pocket -6, racket - 7, support base -8, dynamic capture video camera -9, cross bar -10, rotary shaft -11, ball mouth -12, box body -13, collection ball bucket -14, Holder -15, go out bulb -16, air pump -17, connecting pole -18, motor -19, handle -20, display -21, remote transmitter -22, Lower ball plate -23, diaphragm pressure inductor -24, upper ball plate -25, support column -26, middle ball plate -27, middle ball plate handle -28.
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to Specific implementation mode, the present invention is further explained.
- 3 are please referred to Fig.1, the present invention provides a kind of technical solution:A kind of table tennis auxiliary training device, structure include Desktop 1, touch display screen 5, racket storage pocket 6 and racket 7,1 bottom of the desktop are equipped with montant 2, the montant 2 and desktop 1 It is fixedly connected, 2 side of the montant is equipped with cross bar 10, is fixedly connected between the cross bar 10 and montant 2,2 lower part of the montant Equipped with damping base 3, the damping base 3 is fixedly connected with montant 2, and 1 side of the desktop is equipped with holder 15, the holder 15 Top is equipped with touch display screen 5, and 1 surface of the desktop is equipped with net 4, and 1 left side of the desktop is equipped with racket storage pocket 6, described Racket storage pocket 6 is internally provided with racket 7, and 1 right side of the desktop is equipped with support base 8, and 8 top of the support base is equipped with box body 13,13 top of the box body is equipped with collection ball bucket 14, and the collection ball bucket 14 is fixedly connected with box body 13.
Referring to Fig. 2, the support base 8 is internally provided with motor 19,19 top of the motor is equipped with connecting pole 18, described Connecting pole 18 is fixedly connected with motor 19, is rotated by motor 19 and connecting pole 18 is driven to rotate.
Referring to Fig. 2, the box body 13 is internally provided with out bulb 16, it is described go out 16 bottom of bulb be equipped with support column 26, institute It states out 16 right side of bulb and is equipped with air pump 17, the table tennis inside bulb 16 is released out by air pump 17.
Referring to Fig. 2,13 bottom of the box body is equipped with rotary shaft 11, the rotary shaft 11 is rotatablely connected with box body 13, institute It states rotary shaft 11 to be fixedly connected with connecting pole 18, connecting pole 11 is rotated by motor 19 drives box body 13 to rotate simultaneously, realizes hair The multi-direction service of ball machine.
Referring to Fig. 1,13 medial surface of the box body, which is equipped with dynamic, captures video camera 9, the dynamic captures video camera 9 and passes through Conducting wire is electrically connected with touch display screen 5, and the athletic posture of the real-time record sportsman of video camera 9 is captured by dynamic, and is shown In touch display screen 5, sportsman is facilitated to observe the exercise data of oneself.
Referring to Fig. 3,7 top of the racket is equipped with upper ball plate 25, upper 25 side of ball plate is equipped with handle 20, described to hold 20 surfaces are equipped with display 21, upper 25 lower part of ball plate is equipped with middle ball plate 27, and middle 27 lower part of ball plate is equipped with lower ball plate 23, the recordable number of swinging the bat of display 21.
Referring to Fig. 3, middle 27 side of ball plate is equipped with middle ball plate handle 28, middle 27 surface of ball plate is equipped with film pressure Power inductor 24, middle 28 surface of ball plate handle are equipped with remote transmitter 22, the remote transmitter 22 and touch display screen 5 It is wirelessly connected, diaphragm pressure inductor 24 is set among ball plate, records the impact dynamics of sportsman in real time, and passes through remote transmission Device 22 is shown in touch display screen 5, and sportsman adjusts motion state according to the data of oneself.
A kind of table tennis auxiliary training apparatus structure of the present invention is simple, easy to operate, and table tennis is put into collection ball bucket 14 Pang ball, by air pump 17 table tennis from going out in bulb 16 to release, 13 lower part of box body is equipped with rotary shaft 11, inside support base 8 Equipped with motor 19, connecting pole 18 is fixedly connected with motor 19, and the rotation of motor 19 drives connecting pole 18 to rotate, and connecting pole 18 rotates band Dynamic rotary shaft 11 rotates, when box body 13 can rotate, dynamic is equipped in box body 13 and captures video camera 9, can record the reality of sportsman When motion state, and be recorded in touch display screen 5, diaphragm pressure inductor 24 be equipped in matching used racket 7, is remembered in real time The impact dynamics of sportsman is recorded, and by remote transmitter 22, is transferred in touch display screen 5, racket handle is equipped with display Device 21 records number of swinging the bat.
The desktop 1 of the present invention, montant 2, damping base 3, net 4, touch display screen 5, racket storage pocket 6, racket 7, branch Support pedestal 8, dynamic capture video camera 9, cross bar 10, rotary shaft 11, ball mouth 12, box body 13, collection ball bucket 14, holder 15, go out ball Pipe 16, air pump 17, connecting pole 18, motor 19, handle 20, display 21, remote transmitter 22, lower ball plate 23, diaphragm pressure sense Device 24, upper ball plate 25, support column 26, middle ball plate 27, middle ball plate handle 28 are answered, component is universal standard part or art technology The component that personnel know, structure and principle, which are all this technology personnel, can be learnt by technical manual or by routine experiment side Method knows, problems solved by the invention is sportsman during carrying out table tennis training, it is general be difficult by repeat come It was found that itself defect and weak link.Such as in practicing impact, sportsman strikes the table tennis sent out from service robot repeatedly Pang ball, it is difficult to find the stroke imperfections and weak link of itself, not only bad for the promotion of motor skill, nor can science Geostatistics analysis goes out corresponding data, and the present invention is combined with each other by above-mentioned component, a kind of table tennis auxiliary training device It is easy to operate, it is simple in structure, by installing service robot in one end of ball table, emit table tennis to sportsman, by service robot The dynamic of installation captures video camera, carries out capture record to the athletic posture of sportsman, and be shown in touch display screen, moves Member can observe the motion state of oneself at any time, which coordinates racket to use, and installs by diaphragm pressure inductor, passes through in racket Remote transmitter can record the impact dynamics of sportsman, be shown in touch display screen at any time, and sportsman can be according to data tune Whole motion state.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from the present invention spirit or In the case of essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state Bright restriction, it is intended that including all changes that come within the meaning and range of equivalency of the claims in the present invention It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the embodiments can also be through suitably closing, and group forms those skilled in the art The other embodiment being appreciated that.

Claims (7)

1. a kind of table tennis auxiliary training device, structure include desktop (1), touch display screen (5), racket storage pocket (6) and Racket (7), it is characterised in that:Desktop (1) bottom is equipped with montant (2), and the montant (2) is fixedly connected with desktop (1), institute It states montant (2) side and is equipped with cross bar (10), be fixedly connected between the cross bar (10) and montant (2), montant (2) lower part is set There are damping base (3), the damping base (3) to be fixedly connected with montant (2), desktop (1) side is equipped with holder (15), institute It states holder (15) top and is equipped with touch display screen (5), desktop (1) surface is equipped with net (4), is set on the left of the desktop (1) There are racket storage pocket (6), the racket storage pocket (6) to be internally provided with racket (7), support base is equipped on the right side of the desktop (1) (8), support base (8) top is equipped with box body (13), and box body (13) surface is equipped with ball mouth (12), the box body (13) top is equipped with collection ball bucket (14), and the collection ball bucket (14) is fixedly connected with box body (13).
2. a kind of table tennis auxiliary training device according to claim 1, it is characterised in that:In the support base (8) Portion is equipped with motor (19), and motor (19) top is equipped with connecting pole (18), the connecting pole (18) and the fixed company of motor (19) It connects.
3. a kind of table tennis auxiliary training device according to claim 1, it is characterised in that:It is set inside the box body (13) Have a bulb (16), it is described go out bulb (16) bottom be equipped with support column (26), it is described go out bulb (16) on the right side of be equipped with air pump (17).
4. a kind of according to claim a kind of table tennis auxiliary training device, it is characterised in that:Box body (13) bottom Equipped with rotary shaft (11), the rotary shaft (11) is rotatablely connected with box body (13), and the rotary shaft (11) is solid with connecting pole (18) Fixed connection.
5. a kind of according to claim a kind of table tennis auxiliary training device, it is characterised in that:On the inside of the box body (13) Face is equipped with dynamic and captures video camera (9), and the dynamic captures video camera (9) and is electrically connected by conducting wire and touch display screen (5).
6. a kind of according to claim a kind of table tennis auxiliary training device, it is characterised in that:Racket (7) top Equipped with upper ball plate (25), upper ball plate (25) side is equipped with handle (20), and handle (20) surface is equipped with display (21), Upper ball plate (25) lower part is equipped with middle ball plate (27), and middle ball plate (27) lower part is equipped with lower ball plate (23).
7. a kind of according to claim 6 kind of table tennis auxiliary training device, it is characterised in that:Middle ball plate (27) side Face is equipped with middle ball plate handle (28), and middle ball plate (27) surface is equipped with diaphragm pressure inductor (24), the middle ball plate handle (28) surface is equipped with remote transmitter (22), and the remote transmitter (22) is wirelessly connected with touch display screen (5).
CN201810480806.3A 2018-05-18 2018-05-18 A kind of table tennis auxiliary training device Pending CN108654032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810480806.3A CN108654032A (en) 2018-05-18 2018-05-18 A kind of table tennis auxiliary training device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810480806.3A CN108654032A (en) 2018-05-18 2018-05-18 A kind of table tennis auxiliary training device

Publications (1)

Publication Number Publication Date
CN108654032A true CN108654032A (en) 2018-10-16

Family

ID=63776921

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810480806.3A Pending CN108654032A (en) 2018-05-18 2018-05-18 A kind of table tennis auxiliary training device

Country Status (1)

Country Link
CN (1) CN108654032A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109692454A (en) * 2019-02-25 2019-04-30 安徽理工大学 Shared ping-pong table based on Internet of Things
CN113797515A (en) * 2021-08-31 2021-12-17 海南翔睿德科技有限公司 Table tennis service robot capable of automatically counting
CN114028790A (en) * 2021-11-10 2022-02-11 上海创屹科技有限公司 Table tennis service robot

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104353229A (en) * 2014-11-25 2015-02-18 钟小强 Intelligent table tennis racket based on bluetooth
CN205108972U (en) * 2015-11-12 2016-03-30 所俊悟 Table tennis training table
CN105833493A (en) * 2016-04-24 2016-08-10 徐伟明 Table tennis racket for teaching training
CN106730715A (en) * 2017-01-20 2017-05-31 南京晓庄学院 Table tennis intelligent training equipment
CN107773939A (en) * 2017-11-30 2018-03-09 河南理工大学 A kind of table tennis auxiliary training device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104353229A (en) * 2014-11-25 2015-02-18 钟小强 Intelligent table tennis racket based on bluetooth
CN205108972U (en) * 2015-11-12 2016-03-30 所俊悟 Table tennis training table
CN105833493A (en) * 2016-04-24 2016-08-10 徐伟明 Table tennis racket for teaching training
CN106730715A (en) * 2017-01-20 2017-05-31 南京晓庄学院 Table tennis intelligent training equipment
CN107773939A (en) * 2017-11-30 2018-03-09 河南理工大学 A kind of table tennis auxiliary training device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109692454A (en) * 2019-02-25 2019-04-30 安徽理工大学 Shared ping-pong table based on Internet of Things
CN113797515A (en) * 2021-08-31 2021-12-17 海南翔睿德科技有限公司 Table tennis service robot capable of automatically counting
CN114028790A (en) * 2021-11-10 2022-02-11 上海创屹科技有限公司 Table tennis service robot

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Application publication date: 20181016