CN110170156A - A kind of table tennis rebound plate, support frame and its ping-pong table - Google Patents
A kind of table tennis rebound plate, support frame and its ping-pong table Download PDFInfo
- Publication number
- CN110170156A CN110170156A CN201910087922.3A CN201910087922A CN110170156A CN 110170156 A CN110170156 A CN 110170156A CN 201910087922 A CN201910087922 A CN 201910087922A CN 110170156 A CN110170156 A CN 110170156A
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- China
- Prior art keywords
- table tennis
- sensor
- display
- rebound plate
- processor
- 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
Links
- 238000010276 construction Methods 0.000 claims description 6
- 230000035939 shock Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B25/00—Card tables; Tables for other games
- A47B25/003—Card tables; Tables for other games for table tennis
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B67/00—Sporting games or accessories therefor, not provided for in groups A63B1/00 - A63B65/00
- A63B67/04—Table games physically beneficial for the human body, modelled on outdoor sports, e.g. table tennis
-
- 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
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application 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
- A63B2102/16—Table tennis
-
- 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
-
- 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
- A63B2220/50—Force related parameters
- A63B2220/56—Pressure
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The present invention relates to a kind of mechanical structure fields, more specifically, it is related to a kind of table tennis rebound plate, table tennis rebound plate include rebound plate main body, sensor, transmit for receiving sensor the processor of signal and signal processing, for the display of display, the display, sensor are electrically connected with processor, the supporting surface opposite with impact surface, the sensor cover entire supporting surface interior zone.The present invention provides a kind of table tennis rebound plate, the sensor is installed on supporting surface by the first detachable structure, the setting that the display, sensor are electrically connected with processor, so that being struck by table tennis, so that sending processor to using the electric signal that sensor generates, processor is transferred to display, and for the electric signal generated each time, it is primary that display carries out accumulated counts.Namely when rattle ball impact table tennis rebound plate when, table tennis rebound plate generate vibration, while stick table tennis rebound plate sensor also generate vibration, so that sensor can produce pulse signal, it is then transferred to processor, processor carries out data processing, then shown by display.
Description
Technical field
The present invention relates to a kind of mechanical structure fields, more particularly, to a kind of table tennis rebound plate, support frame and its table tennis
Pang ball table.
Background technique
National ball game of the table tennis as China, the whole people take much count of.So many players have been sportsman, sportsman is in order to more
Good promotion playing skill, needs largely to practice, and is all to have coach, but the quantity and energy trained are limited in the past.It therefore can
A kind of table tennis rebound demand of plate appellation of part substitution coach.
Table tennis rebound plate is to solve during table tennis practice unmanned training mate or in order to reach certain practice effect
Table tennis practising device.Because the ball of certain angle is difficult to control for a long time by people during the practice of table tennis, or
Person ladder player is difficult to carry out training for a long time together, and there is also an artificial counting not only fatigue but also is easy to remember mixed ask
Topic.
Summary of the invention
The present invention in order to overcome at least one of the drawbacks of the prior art described above, provides a kind of table tennis rebound plate, described
Sensor covers entire supporting surface interior zone, the setting that the display, sensor are electrically connected with processor, so that passing through
Table tennis impact, so that sending processor to using the electric signal that sensor generates, processor is transferred to display, for each
The electric signal of secondary generation, it is primary that display carries out accumulated counts.Namely when ball impact table tennis of rattling rebounds plate, table tennis
The plate that rebounds generates vibration, while the sensor for covering entire supporting surface interior zone also generates vibration, and sensor is produced
Raw pulse signal, is then transferred to processor, and single-chip microcontroller carries out data processing, then shown by display.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of table tennis rebound plate is provided, the table tennis rebound plate includes rebound plate main body, sensor, is used for receiving sensor
Processor, the display for display of signal and signal processing are transmitted, the display, sensor are electrically connected with processor
It connects, the rebound plate main body includes the impact surface and the supporting surface opposite with impact surface that back is connected, the sensor covering
Entire supporting surface interior zone.
The present invention provides a kind of table tennis rebound plate, and the sensor covers entire supporting surface interior zone, the display
The setting that device, sensor are electrically connected with processor, so that being struck by table tennis, so that the electric signal generated using sensor
Send processor to, processor is transferred to display, and for the electric signal generated each time, display carries out accumulated counts one
It is secondary.Namely when table tennis ball impact table tennis rebound plate, table tennis rebound plate generates vibration, while sticking in table tennis rebound plate
Sensor also generate vibration so that sensor can produce pulse signal, be then transferred to processor, processor carries out data
Processing, is then shown by display.
Preferably, the processor, display are mounted on rebound plate body top or side.Processor, display are equal
It is preferred for being installed on rebound plate body top or these settings of side, is not restrictive regulation, as long as display is installed on
The number of display can be seen clearly just, processor is mainly mounted to be not easy at the position destroyed.
Preferably, supporting surface is equipped with the card slot for installing display.Setting is aobvious for the ease of Fast Installation in this way
Show device.Preferably, the size that the size of card slot contacts installation with display matches.
Preferably, the sensor is piezoelectric transducer or shock sensor, and processor is processor of single chip computer, described aobvious
Show that device is four common-anode charactrons.Sensor is the setting of piezoelectric transducer or shock sensor primarily to making in table tennis
During pang ball strikes, vibration signal can accurately be more experienced.These settings are all preferred, are not restrictive rule
It is fixed.
Preferably, processor of single chip computer is 89C51 single-chip microcontroller, including pin P32, P33, P34, P35, P36, P21, pin
P32, P33, P34 are connect with three connecting pins of four common-anode charactrons respectively；Pin P35 and counter start key circuit
End connection, pin P36 are connect with display clear screen key circuit, and pin P21 is electrically connected with sensor.Setting is to mention in this way
For effectively controlling and connecting circuit.
Preferably, the rebound plate main body is an integral molding structure.Setting is in order to avoid repeatedly processing and connecing in this way
Mouth is so that degradation.
The present invention also provides a kind of support frame of the rebound plate of table tennis described in installation, the table tennis rebound plate passes through can
Detaching structure is connect with support frame.It is to provide for a kind of support frame that can arbitrarily place table tennis rebound plate in this way.Pass through
Setting has been to provide for convenience in this way.
Preferably, the detachable structure includes helicitic texture, inserting slot construction or buckle structure.Setting is in order to fast in this way
Speed installation table tennis rebound plate.Wherein, these structures of helicitic texture, inserting slot construction or buckle structure are only preferred, are not limit
The regulation of property processed.
The present invention also provides a kind of ping-pong table of the support frame of installation table tennis rebound plate, support frame as described above passes through fixture
Structure is detachably clamped with ping-pong table.Setting is in order to enable support frame and ping-pong table 7 are quickly clamped in this way.
Preferably, the clamp structure is equipped with card slot and the rotary screw for adjusting card slot openings of sizes.It sets in this way
It sets primarily to adapt to the ping-pong table of different-thickness, improves its versatility.
Compared with prior art, the beneficial effects of the present invention are:
The present invention provides a kind of table tennis rebound plate, support frame and ping-pong table, the sensor and covers inside entire supporting surface
Region, the setting that the display, sensor are electrically connected with processor, so that being struck by table tennis, so that utilizing sensing
The electric signal that device generates sends processor to, and processor is transferred to display, for the electric signal generated each time, display into
Row accumulated counts are primary.Namely when ball impact table tennis of rattling rebounds plate, table tennis rebound plate generates vibration, covers simultaneously
The sensor of entire supporting surface interior zone also generates vibration, so that sensor can produce pulse signal, is then transferred to place
Device is managed, single-chip microcontroller carries out data processing, then shown by display.By providing support frame and ping-pong table, thus
Provide preferably training device；Have the following advantages that 1. four LED show number of strokes automatically, real-time is good, and timeliness is good.
2. table tennis rebound plate facilitates installation to any place for having billiard table, assembly and disassembly are easy, practical.3. electronic digital information produces
Raw simple digital information feedback, ancillary table tennis practitioner are trained.4. counter and rebound plate can satisfy middle, it is remote
Director's ball and the practice killed have certain booster action to table tennis technical ability is improved.
Detailed description of the invention
Fig. 1 is a kind of schematic illustration of table tennis rebound plate of the present invention.
Fig. 2 is a kind of circuit diagram of table tennis rebound plate of the present invention.
Fig. 3 is the structural schematic diagram of table tennis rebound plate.
Fig. 4 is the structural schematic diagram of display.
Fig. 5 is the structural schematic diagram of support frame.
Fig. 6 is the structural schematic diagram for installing the ping-pong table of support frame of table tennis rebound plate.
Specific embodiment
The present invention is further illustrated With reference to embodiment.Wherein, attached drawing only for illustration,
What is indicated is only schematic diagram, rather than pictorial diagram, should not be understood as the limitation to this patent；Reality in order to better illustrate the present invention
Example is applied, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To those skilled in the art
For, the omitting of some known structures and their instructions in the attached drawings are understandable.
The same or similar label correspond to the same or similar components in the attached drawing of the embodiment of the present invention；It is retouched in of the invention
In stating, it is to be understood that if the orientation or positional relationship for having the instructions such as term " on ", "lower", "left", "right" is based on attached drawing
Shown in orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore positional relationship is described in attached drawing
Term only for illustration, should not be understood as the limitation to this patent, for the ordinary skill in the art, can
To understand the concrete meaning of above-mentioned term as the case may be.
Embodiment one
It is as shown in Figures 1 to 4 a kind of first embodiment of table tennis rebound plate of the present invention, the table tennis rebound plate includes rebound
Plate main body 1, sensor 2, the processor 3 for transmitting for receiving sensor 2 signal and signal processing, for the display 4 of display,
Display 4, sensor 2 are electrically connected with processor 3, and the rebound plate main body 1 includes the impact surface 11 and branch that back is connected
Support face 12, sensor 2 cover entire 12 interior zone of supporting surface.Sensor 2 covers entire 12 interior zone of supporting surface, display
The setting that device, sensor are electrically connected with processor, so that being struck by table tennis, so that the electric signal generated using sensor
Send processor to, processor is transferred to display, and for the electric signal generated each time, display carries out accumulated counts one
It is secondary.Namely when ball impact table tennis of rattling rebounds plate, table tennis rebound plate generates vibration, while covering entire supporting surface 12
The sensor of interior zone also generates vibration, so that sensor can produce pulse signal, is then transferred to processor, single-chip microcontroller
Data processing is carried out, is then shown by display.
Wherein, processor 3, display 4 are mounted on 1 top of rebound plate main body or side.Processor, display are respectively mounted
Being in rebound plate body top or these settings of side is not restrictive regulation, as long as display, which is installed on, to be seen preferably
Just, processor is mainly mounted at the position for being not easy to destroy the number that must be clearly showed that.
In addition, sensor 2 is piezoelectric transducer or shock sensor, processor 3 is processor of single chip computer, and display 4 is
Four common-anode charactrons.Sensor is the setting of piezoelectric transducer or shock sensor primarily to hit in table tennis
During beating, vibration signal can accurately be more experienced.These settings are all preferred, are not restrictive regulation.
Wherein, processor of single chip computer is 89C51 single-chip microcontroller, including pin P32, P33, P34, P35, P36, P21, pin
P32, P33, P34 are connect with three connecting pins of four common-anode charactrons respectively；Pin P35 and counter start key circuit
End connection, pin P36 are connect with 4 clear screen key circuit of display, and pin P21 is electrically connected with sensor 2.In this way setting be in order to
Effective control and connection circuit are provided.
In addition, rebound plate main body 1 is an integral molding structure.In this way setting be in order to avoid repeatedly process occur interface to
So that degradation.
Embodiment two
It is illustrated in figure 5 a kind of second embodiment of the support frame of table tennis rebound plate of the present invention, table tennis rebound plate passes through can
Detaching structure 5 is connect with support frame 6.It is to provide for a kind of support frame that can arbitrarily place table tennis rebound plate in this way.It is logical
It crosses setting in this way and has been to provide for convenience.
Wherein, detachable structure includes helicitic texture, inserting slot construction or buckle structure.Setting in this way is to realize quickly
Assembly and disassembly.Detachable structure 5 is inserting slot construction in the present embodiment, and inserting slot construction includes the plate 51 and peace set on table tennis rebound plate
Loaded on the slot 52 on support frame 6.
In addition, support frame 6 includes the adjusting joint for adjusting 52 angle of slot, adjusts 52 opposed jaw structure of slot, 8 front and back
The front and back adjusting rod 63 of distance and the height adjusting rod 64 for adjusting 52 opposed jaw structure of slot, 8 height.Adjusting joint includes phase
The horizontal direction first to connect adjusts joint 61 and tilt angle second adjusts joint 62, and first, which adjusts joint 61 and second, adjusts
Section joint 62 is disc-shaped structure, rotatably adjustable angle.First adjusting joint 61, second adjusts joint 62 and is all provided with angled show
Show that device, angular display unit include being set to angle index and theta alignment line.
Wherein, front and back adjusting rod 63 and height adjusting rod 64 are fixed by jockey, and jockey is equipped with pine
Tight knob can make front and back adjusting rod 63 and height adjusting rod 64 become free shape jockey release by rotating elastic knob
State regulates and tightens elastic knob again after length and can be fixed.Front and back adjusting rod 63 and height adjusting rod 64 are equipped with
Length display, length display include length scale and length alignment line on the body of rod.
First adjusts the adjusting joint 62 of joint 61, second, front and back adjusting rod 63 and height adjusting rod 64 can be to rebound plate 1
Angle position carries out comprehensive adjusting, improves suitability when training.Angular display unit and length display can be convenient for movements
Member's record and the angle position for adjusting rebound plate are trained, and keep training more accurate.
Embodiment three
It is illustrated in figure 6 the second embodiment of the ping-pong table of the support frame of table tennis rebound plate of the present invention, support frame passes through folder
Lamps structure 8 and ping-pong table 7 are detachably clamped.Setting is in order to enable support frame and ping-pong table 7 are quickly clamped in this way.
Wherein, clamp structure 8 is equipped with card slot 81 and the rotary screw 82 for adjusting 81 openings of sizes of card slot.It sets in this way
It sets primarily to adapt to the ping-pong table of different-thickness, improves its versatility.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (10)
- The plate 1. a kind of table tennis rebounds, which is characterized in that the table tennis rebound plate includes rebound plate main body (1), sensor (2), described aobvious for receiving sensor (2) transmission signal and processor (3), the display (4) for display of signal processing Show that device (4), sensor (2) are electrically connected with processor (3), rebound plate main body (1) includes the impact surface that back is connected The supporting surface (12) opposite with impact surface, the sensor (2) cover entire supporting surface (12) interior zone.
- The plate 2. table tennis according to claim 1 rebounds, which is characterized in that the processor (3), display (4) are pacified Loaded at the top of rebound plate main body (1) or side.
- The plate 3. table tennis according to claim 1 rebounds, which is characterized in that the supporting surface (12) is equipped with for installing The card slot (121) of display (4).
- The plate 4. table tennis according to claim 3 rebounds, which is characterized in that the sensor (2) be piezoelectric transducer or Shock sensor, processor (3) are processor of single chip computer, and the display (4) is four common-anode charactrons.
- The plate 5. table tennis according to claim 4 rebounds, which is characterized in that processor of single chip computer is 89C51 single-chip microcontroller, packet Pin P32, P33, P34, P35, P36, P21 are included, pin P32, P33, P34 are connect with three of four common-anode charactrons respectively End connection；Pin P35 starts key circuit end with counter and connect, and pin P36 is connect with display (4) clear screen key circuit, Pin P21 is electrically connected with sensor (2).
- The plate 6. table tennis according to claim 1 rebounds, which is characterized in that the rebound plate main body (1) is integrally formed Structure.
- 7. a kind of support frame for installing table tennis rebound plate as claimed in any one of claims 1 to 6, which is characterized in that the table tennis Pang ball rebound plate is connect by detachable structure (5) with support frame (6).
- 8. the support frame of table tennis rebound plate according to claim 7, which is characterized in that detachable structure (5) packet Include helicitic texture, inserting slot construction or buckle structure.
- 9. a kind of ping-pong table for the support frame for installing table tennis rebound plate according to any one of claims 8, which is characterized in that the branch Support is detachably clamped by clamp structure (8) and ping-pong table (7).
- 10. the ping-pong table of the support frame of table tennis rebound plate according to claim 9, which is characterized in that the fixture Structure (8) is equipped with card slot (81) and the rotary screw (82) for adjusting card slot (81) openings of sizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910087922.3A CN110170156A (en) | 2019-01-29 | 2019-01-29 | A kind of table tennis rebound plate, support frame and its ping-pong table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910087922.3A CN110170156A (en) | 2019-01-29 | 2019-01-29 | A kind of table tennis rebound plate, support frame and its ping-pong table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110170156A true CN110170156A (en) | 2019-08-27 |
Family
ID=67689291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910087922.3A Pending CN110170156A (en) | 2019-01-29 | 2019-01-29 | A kind of table tennis rebound plate, support frame and its ping-pong table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110170156A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414179A (en) * | 2022-01-20 | 2022-04-29 | 武汉理工大学 | Basketball elasticity testing arrangement |
| CN114949810A (en) * | 2022-05-20 | 2022-08-30 | 狄运河 | Table tennis rebound board with counter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5935024A (en) * | 1998-01-22 | 1999-08-10 | Lao; John A. | Ping pong rebound board |
| CN202387187U (en) * | 2011-11-08 | 2012-08-22 | 徐彦辉 | Table type pingpang trainer |
| CN205360521U (en) * | 2016-02-05 | 2016-07-06 | 王东升 | Vertical table tennis device with automatic counting function |
| CN205612991U (en) * | 2016-05-03 | 2016-10-05 | 陕西国际商贸学院 | Ping -pong ball drop point accurately practicing and ball collecting net rack |
| CN210473002U (en) * | 2019-01-29 | 2020-05-08 | 广东工业大学 | Table tennis rebound board, support frame and table tennis table thereof |
-
2019
- 2019-01-29 CN CN201910087922.3A patent/CN110170156A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5935024A (en) * | 1998-01-22 | 1999-08-10 | Lao; John A. | Ping pong rebound board |
| CN202387187U (en) * | 2011-11-08 | 2012-08-22 | 徐彦辉 | Table type pingpang trainer |
| CN205360521U (en) * | 2016-02-05 | 2016-07-06 | 王东升 | Vertical table tennis device with automatic counting function |
| CN205612991U (en) * | 2016-05-03 | 2016-10-05 | 陕西国际商贸学院 | Ping -pong ball drop point accurately practicing and ball collecting net rack |
| CN210473002U (en) * | 2019-01-29 | 2020-05-08 | 广东工业大学 | Table tennis rebound board, support frame and table tennis table thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414179A (en) * | 2022-01-20 | 2022-04-29 | 武汉理工大学 | Basketball elasticity testing arrangement |
| CN114949810A (en) * | 2022-05-20 | 2022-08-30 | 狄运河 | Table tennis rebound board with counter |
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