CN115350461A - Auxiliary ball hitting device - Google Patents

Auxiliary ball hitting device Download PDF

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Publication number
CN115350461A
CN115350461A CN202210844376.5A CN202210844376A CN115350461A CN 115350461 A CN115350461 A CN 115350461A CN 202210844376 A CN202210844376 A CN 202210844376A CN 115350461 A CN115350461 A CN 115350461A
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CN
China
Prior art keywords
racket
face
rod
set forth
connecting plate
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Pending
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CN202210844376.5A
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Chinese (zh)
Inventor
张予涵
林勇翔
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Individual
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Individual
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Publication of CN115350461A publication Critical patent/CN115350461A/en
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    • 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

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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 auxiliary batting device, which comprises a bat body, wherein the bat body comprises a frame body and an elastic bat surface arranged in the frame body, the frame body at the rear side of the bat surface is connected with a support, and the support is provided with a pulling mechanism which pulls the bat surface backwards and loosens the bat surface. The racket body is fixed at one end of the table tennis table, such as the edge of the table top, a user can play a table tennis at the other end of the table tennis table, the table tennis is played on the racket face, the racket face is quickly and repeatedly pulled by the pulling mechanism and then loosened, so that the racket face has the force of the racket ball, the table tennis is reversely played, and the user can play the ball with the auxiliary ball playing device after the pulling mechanism is repeated, so that the auxiliary ball playing device can assist the user in practicing playing the ball. The invention can be used by being fixed on the ground or on the wall surface. The invention can also be used for playing tennis and badminton, for example, people play badminton or tennis towards the racket surface, the racket surface is opposite to the racket surface, people play the badminton again, and the badminton playing is repeated, so that the invention plays a role in assisting people in playing the badminton.

Description

Auxiliary ball hitting device
Technical Field
The invention belongs to the field of sports, and particularly relates to an auxiliary batting device.
Background
Various devices for assisting people in playing ball items exist at present, such as a table tennis robot for playing balls, but the robot has high scientific and technical requirements and high intelligence degree, so that the manufacturing cost is high, and even the robot for playing the table tennis is large in size or weight generally, and is not favorable for popularization in total.
Disclosure of Invention
In view of the above, the present invention provides an auxiliary device, which has low technical requirements and low intelligence, and has no large volume and weight when used for assisting table tennis.
In order to realize the purpose of the invention, the following technical scheme is adopted for realizing the purpose: the auxiliary batting device comprises a bat body, wherein the bat body comprises a frame body and an elastic bat surface arranged in the frame body, the frame body on the rear side of the bat surface is connected with a support, and the support is provided with a pulling mechanism which pulls the bat surface backwards and looses the bat surface.
Through the setting, fix the bat body in table tennis table one end, if desktop edge, the people is in the table tennis table other end and is played the table tennis, play the bat face on, pull the mechanism and pull the bat face fast repeatedly and then loosen for the bat face has the strength of bat ball, so get back the table tennis in reverse, so relapse, people just can play with supplementary device of playing, supplementary device of playing just so can assist people to practice playing. The invention can be used by being fixed on the ground or on the wall surface. The invention can also be used for playing tennis and badminton, for example, people play badminton or tennis towards the racket surface, the racket surface is opposite to the racket surface, people play the badminton again, and the badminton playing is repeated, so that the invention plays a role in assisting people in playing the badminton.
Further optimally: and a detection mechanism for detecting that the ball body is close to the racket face is arranged on the frame body at the front side of the racket face.
Through the setting, detection mechanism can detect that the ball is close to the face of clapping, so pull the mechanism and loosen the face of clapping for the face of clapping resets and removes to play the ball, so the face of clapping is played a ball, is pulled and then is let go once by the mechanism of pulling, need not constantly pull repeatedly and loosen, and the required ability of mechanism is pulled in the saving on the one hand to the pertinence of beating like this, and on the other hand reduces the face of clapping and pulls the fatigue of mechanism, makes them be difficult for because of tired breakage.
Further optimally: the middle part of the back side of the racket face is connected with a connecting plate capable of being attracted by magnetic substances, the pulling mechanism comprises an electromagnet for attracting the connecting plate, and the device further comprises a power supply for supplying electric energy to the electromagnet.
Through the setting, the circular telegram of the electromagnet body attracts the connecting plate to drag the face of a racket, after the electro-magnet outage, the electro-magnet no longer attracts the connecting plate, so the face of a racket resets under self elasticity, so can pat the ball, so drag the effect of mechanism and just reached.
Further optimally: the middle part of the rear side of the racket surface is connected with a connecting plate, the pulling mechanism comprises a pneumatic mechanism, the pneumatic mechanism comprises a cylinder body, a piston rod and a piston body, a piston cavity is arranged in the cylinder body, the piston rod enters the piston cavity from one end of the cylinder body, the outer end of the piston rod is connected with the connecting plate, and the inner end of the piston rod is connected with the piston body; the other end of the cylinder body is connected with an air inlet head and an electromagnetic air inlet valve; the air exhaust pump is connected with the air outlet head through an air pipe; the device also comprises a power supply and a controller.
Through the above setting: the air in the piston cavity is pumped out by the inflator pump, the piston rod can move towards the piston cavity under the action of atmospheric pressure, the connecting plate is driven to pull the racket face, when the air inlet valve is opened, the air enters the piston cavity, and under the elastic force of the racket face, the racket face can be reset to form the force of racket ball, so that the effect of the pulling mechanism is achieved.
Further optimally: the racket is characterized in that a connecting plate is connected to the middle of the rear side of the racket face, the pulling mechanism comprises a plurality of pushing mechanisms, each pushing mechanism comprises a control rod, a first electric push rod and two second electric push rods, one end of each control rod is connected with the connecting plate, the other end of each control rod is connected with a clamping plate, the first electric push rods push the clamping plates in the direction away from the racket face, and output shafts of the two second electric push rods extend out to be used for blocking the clamping plates and controlling the clamping plates to reset.
Through the aforesaid setting, first electric putter promotes the screens board to the direction of keeping away from the face of clapping, so make the control lever take the connecting plate to drag the face of clapping, after the screens board removed the settlement position, second electric putter's output shaft stretches out, block the screens board, then first electric putter's output shaft resets, in needs, second electric putter's output shaft resets, so make the screens board under the elasticity of face of clapping, the control lever, connecting plate and face of clapping reset, so the face of clapping has the power of clapping the ball under self elastic action, so play the effect of dragging the mechanism.
Further optimally: the detection mechanism is a radar or a distance sensor.
Through the arrangement, the radar and the distance sensor can detect whether an object is close to the racket, so that whether the ball is close to the racket face or not is judged, and the effect of the detection mechanism is achieved.
Further optimally: the racket comprises a first rotating mechanism for controlling the racket body to rotate left and right, wherein the first rotating mechanism comprises a first motor with an upward rotating shaft, the lower end of the frame body is connected with a connecting rod, and the rotating shaft of the first motor is connected with the lower end of the connecting rod.
Through the arrangement, the first motor rotates to control the racket body to rotate left and right, so that the racket body can bat a ball left or right, the ball rebounds in different left or right directions, the ball hitting difficulty is increased, and the auxiliary effect of the racket is not single and is richer.
Further optimally: the racket comprises a second rotating mechanism for controlling the racket body to rotate up and down, wherein the second rotating mechanism comprises a connecting ring, a second motor arranged on one side of the upper end of the connecting ring, an installation rod connected with the racket body, and a rotating head fixedly connected with the lower end of the installation rod, the rotating head is hinged with the connecting ring, and one end of the rotating head is connected with a rotating shaft of the second motor.
Through the arrangement, the second motor rotates to enable the racket body to rotate upwards or downwards, so that the ball rebounds in different directions obliquely upwards or obliquely downwards, the ball playing difficulty is increased, and the auxiliary effect of the racket is not single and is richer.
Further optimally: the bat surface is sheet-shaped or net-shaped.
Through the arrangement, the weight of the whole device can be reduced.
Compared with the prior art, the invention has the main beneficial effects that: the invention mainly comprises a bat body, a pulling mechanism and a detection mechanism, and compared with the prior ping-pong robot, the technical requirements are not high, and the robot is basically not intelligent, so the manufacturing cost is naturally much lower, the volume or the weight can be smaller than that of the prior ping-pong robot, and the popularization is more convenient. Although the invention does not have the function that the high-tech high-intelligent robot can play the ball in a targeted manner, the high-tech high-intelligent robot can bounce the ball and can play a certain role in accompanying.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is an exploded view of embodiment 1 of the present invention;
FIG. 3 is a schematic rear side view of a racket body according to embodiment 1 of the present invention;
FIG. 4 is a schematic bottom view of the racket body according to embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a first rotating mechanism and a second rotating mechanism in embodiment 1 of the present invention;
FIG. 6 is a schematic view of a pulling mechanism according to example 2 of the present invention;
FIG. 7 is a cross-sectional view of a pulling mechanism according to embodiment 2 of the present invention;
fig. 8 is a schematic structural view of a pulling mechanism in embodiment 3 of the present invention.
Reference numerals: 1. a racket body; 11. a frame body; 111. a detection mechanism; 12. patting; 121. a connecting plate; 13. a support; 14. a connecting rod; 141. a slot; 142. a jack; 2. a first motor; 22. inserting plates; 23. a screw; 3. a second rotating mechanism; 31. a support bar; 311. supporting legs; 32. a connecting ring; 321. a connecting cover; 33. a second motor; 331. a plug-in connector; 34. mounting a rod; 35. rotating the head; 351. inserting holes; 4. an electromagnet; 5. a pneumatic mechanism; 51. a cylinder body; 511. a piston cavity; 52. a piston rod; 53. a piston body; 54. an air outlet head; 55. an intake valve; 6. a plurality of pushing mechanisms; 61. a control lever; 611. a clamping plate; 62. a first electric push rod; 63. a second electric push rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 8 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 and 2: the auxiliary batting device comprises a bat body 1, wherein the bat body 1 comprises a square frame body 11 and an elastic bat surface 12 arranged in the frame body 11. The racket also comprises a first rotating mechanism for controlling the racket body 1 to rotate left and right and a second rotating mechanism 3 for controlling the racket body 1 to rotate up and down. The frame 11 at the back of the racket face 12 is fixedly connected with a bracket 13 (see figure 3), and the bracket 13 is provided with a pulling mechanism which pulls the racket face 12 backwards and loosens the racket face 12. The swatting surface 12 can be a metal sheet with the swatting surface 12 being a sheet shape, or a net shape woven by steel wires (or polyester wires or nylon wires), so that the swatting surface 12 is lighter without adding too much weight to the whole device. If the racket is used for playing ping-pong, the front side of the racket face 12 can be pasted with rubber so as to increase the elasticity. The invention can also be provided with a controller for controlling each mechanism.
A detection mechanism 111 for detecting the approach of the ball to the face 12 is attached to the frame 11 on the front side of the face 12. The detection mechanism 111 is a radar or a distance sensor electrically connected to the controller. Specifically, if a radar is adopted, a radar sensor can be installed at the upper end of the front side of the frame body 11 (see fig. 1), so that the front area of the racket face 12 is detected, if an object is close to the racket face 12, the radar can detect the object and feed the object back to the controller, and the controller controls the pulling mechanism correspondingly. If a distance sensor is adopted, a plurality of distance sensors, such as laser distance measuring sensors, can be arranged along one side of the front side of the frame 11, if an object is close to the front side area of the beat surface 12, the distance measuring sensors can detect the distance between the object and the sensors, if the distance is smaller than the corresponding width of the beat surface 12, the object is close to the beat surface 12, and the controller can perform corresponding control.
As shown in fig. 3, a connection plate 121 capable of being attracted by a magnetic substance is connected to the middle of the back side of the racket face 12, and the connection plate 121 may be made of metal such as iron, nickel, or an alloy thereof. The pulling mechanism comprises an electromagnet for attracting the connecting plate 121, and the electromagnet 4 is arranged on the bracket 13. The device also comprises a power supply for supplying electric energy to the electromagnet, and the power supply can adopt a household power supply or an external battery and the like. The electromagnet 4 and the power supply are respectively electrically connected with the controller.
The first rotating mechanism comprises a first motor 2 with an upward rotating shaft, and the lower end of the frame body 11 is connected with a connecting rod 14. The first motor 2 can be a servo motor and is electrically connected with the controller, and the servo motor can control the racket body 1 to rotate leftwards or rightwards within an angle range of 0-60 degrees. The pivot of first motor 2 is connected with connecting rod 14 lower extreme, specifically: referring to fig. 4 and 5, the upper end of the rotating shaft of the first motor 2 is fixedly connected with the inserting plate 22, the lower end of the connecting rod 14 is provided with a slot 141 with a downward opening, the side wall of the slot 141 is provided with a jack 142, the inserting plate 22 is inserted into the slot 141, then the screw 23 is in threaded connection with the jack 142, and the screw 23 is screwed down, so that the screw 23 is screwed into the threaded hole of the inserting plate 22, and the detachable connection of the rotating shaft and the connecting rod 14 is achieved. As shown in fig. 5, the second rotating mechanism 3 includes a connecting ring 32, a second motor 33 mounted on one side of the upper end of the connecting ring 32, a mounting rod 34 connected to the racket body 1 (specifically, the racket body 1 is connected to the mounting rod 34 through the first rotating mechanism and the connecting rod 14, and the first motor 2 is mounted on the mounting rod 34), and a rotating head 35 fixedly connected to the lower end of the mounting rod 34. The second motor 33 can also be a servo motor, and can control the upward or downward rotation of the racket body 1 within the range of 0-30 degrees. The other side of the connection ring 32 is fixedly connected with a connection cap 321, similar to a cap body without screw threads, so that the rotary head 35 can be partially inserted into the connection cap 321 and is hinged with the connection cap 321. The swivel head 35 is hinged to the connection ring 32. One end of the rotating head 35 is connected to the rotating shaft of the second motor 33, specifically, the end of the rotating head 35 is provided with an inserting slot, and the rotating shaft of the second motor 33 is fixedly connected to an inserting head 331 inserted into the inserting hole 351.
In this embodiment, the lower end of the connection ring 32 may be fixedly connected with the support rod 31, and the lower end of the support rod 31 is fixedly connected with the support leg 311, so as to enhance the stability of the whole device.
The approximate using method comprises the following steps: when the embodiment is placed at a proper position, the controller controls the power supply to supply power to the electromagnet 4 in advance, so that the electromagnet 4 attracts the connecting plate 121, then the racket face 12 is pulled to a certain extent, then a player plays a ball on the racket face 12, when the detection mechanism 111 detects that the ball approaches, the controller controls the first motor 33 and the second motor 33 to work to randomly rotate the racket body 1 to a certain position, meanwhile, the controller controls the electromagnet 4 to be powered off, then the racket face 12 resets under the self elasticity, the connecting plate 121 also resets, the racket face 12 also resets and simultaneously plays the ball, the ball is played to the side of the player, the player can play back again, after the electromagnet 4 is powered off for 1-3 seconds, the electromagnet 4 continues to be powered on, attracts the connecting plate 121, then the racket face 12 is pulled to a certain extent, and the ball is played next time.
Example 2
This embodiment is different from embodiment 1 in the difference of the pulling mechanism: as shown in fig. 6 and 7, the pulling mechanism includes a pneumatic mechanism 5, the pneumatic mechanism 5 includes a cylinder 51, a piston rod 52 and a piston body 53, a piston cavity 511 is provided in the cylinder 51, the piston rod 52 enters the piston cavity 511 from one end of the cylinder 51, the outer end of the piston rod 52 is connected to the connecting plate 121, and the inner end of the piston rod 52 is connected to the piston body 53; the other end of the cylinder body 51 is connected with an air inlet head and an electromagnetic air inlet valve 55; and the device also comprises an air suction pump which is connected with the air outlet head 54 through an air pipe. The intake valve 55 and the inflator are electrically connected to the controller. The air pump pumps the air in the piston cavity 511, the piston rod 52 moves in the piston cavity 511 under the action of the atmospheric pressure, so that the connecting plate 121 is driven to pull the racket face 12, when the air inlet valve 55 is opened, the air enters the piston cavity 511, the racket face 12 is reset under the elastic force of the racket face 12 to form the force of racket ball, and the mechanism is controlled by the controller to repeatedly execute the operation, so that the function of the pulling mechanism is achieved.
This embodiment is intended to provide a different pulling mechanism for the man making the invention.
Example 3
This embodiment is different from embodiment 1 in the difference of the pulling mechanism: as shown in fig. 8, the pulling mechanism includes a multi-pushing mechanism 6, the multi-pushing mechanism 6 includes a control rod 61, a first electric push rod 62 and two second electric push rods 63, one end of the control rod 61 is connected with the connecting plate 121, the other end is connected with a blocking plate 611, the first electric push rod 62 pushes the blocking plate 611 in a direction away from the racket face 12, and output shafts of the two second electric push rods 63 extend out to block the blocking plate 611 and control the blocking plate 611 to reset. The first electric push rod and the second electric push rod can also adopt air cylinders, and the reaction speed is faster when the control is carried out. The first electric push rod 62 pushes the blocking plate 611 to the direction far away from the racket face 12, so that the control rod 61 carries the connecting plate 121 to pull the racket face 12, after the blocking plate 611 moves to the set position, the output shaft of the second electric push rod 63 extends out to block the blocking plate 611, then the output shaft of the first electric push rod 62 resets, when needed, the output shaft of the second electric push rod 63 resets, so that the blocking plate 611, the control rod 61, the connecting plate 121 and the racket face 12 reset under the elastic force of the racket face 12, so that the racket face 12 has the force of beating a ball under the self elastic force, the pulling mechanism repeatedly executes the steps under the control of the controller, and thus the pulling mechanism plays the role of the pulling mechanism. This embodiment is intended to provide a different pulling mechanism for the man making the invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art should be able to make general changes and substitutions within the technical scope of the present invention.

Claims (9)

1. Supplementary batting device, its characterized in that: the racket comprises a racket body, wherein the racket body comprises a frame body and an elastic racket face arranged in the frame body, a support is connected to the frame body on the rear side of the racket face, and a pulling mechanism which pulls the racket face backwards and looses the racket face is installed on the support.
2. An auxiliary hitting device as set forth in claim 1, wherein: and a detection mechanism for detecting that the ball body is close to the racket face is arranged on the frame body at the front side of the racket face.
3. An auxiliary hitting device as set forth in claim 1, wherein: the middle part of the back side of the racket face is connected with a connecting plate capable of being attracted by magnetic substances, the pulling mechanism comprises an electromagnet for attracting the connecting plate, and the device further comprises a power supply for supplying electric energy to the electromagnet.
4. An auxiliary hitting device as set forth in claim 1, wherein: the middle part of the back side of the racket face is connected with a connecting plate, the pulling mechanism comprises a pneumatic mechanism, the pneumatic mechanism comprises a cylinder body, a piston rod and a piston body, a piston cavity is arranged in the cylinder body, the piston rod enters the piston cavity from one end of the cylinder body, the outer end of the piston rod is connected with the connecting plate, and the inner end of the piston rod is connected with the piston body; the other end of the cylinder body is connected with an air inlet head and an electromagnetic air inlet valve; the air extracting device also comprises an air extracting pump, wherein the air extracting pump is connected with the air outlet head through an air pipe; the device also comprises a power supply and a controller.
5. An auxiliary hitting device as set forth in claim 1, wherein: the racket is characterized in that a connecting plate is connected to the middle of the rear side of the racket face, the pulling mechanism comprises a plurality of pushing mechanisms, each pushing mechanism comprises a control rod, a first electric push rod and two second electric push rods, one end of each control rod is connected with the connecting plate, the other end of each control rod is connected with a clamping plate, the first electric push rods push the clamping plates in the direction away from the racket face, and output shafts of the two second electric push rods extend out to be used for blocking the clamping plates and controlling the clamping plates to reset.
6. An auxiliary hitting device as set forth in claim 2, wherein: the detection mechanism is a radar or a distance sensor.
7. An auxiliary hitting device as set forth in claim 1, wherein: the racket comprises a first rotating mechanism for controlling the racket body to rotate left and right, wherein the first rotating mechanism comprises a first motor with an upward rotating shaft, the lower end of the frame body is connected with a connecting rod, and the rotating shaft of the first motor is connected with the lower end of the connecting rod.
8. An auxiliary hitting device as set forth in claim 1, wherein: the racket comprises a second rotating mechanism for controlling the racket body to rotate up and down, wherein the second rotating mechanism comprises a connecting ring, a second motor arranged on one side of the upper end of the connecting ring, an installation rod connected with the racket body, and a rotating head fixedly connected with the lower end of the installation rod, the rotating head is hinged with the connecting ring, and one end of the rotating head is connected with a rotating shaft of the second motor.
9. An auxiliary hitting device as set forth in claim 1, wherein: the bat surface is sheet-shaped or net-shaped.
CN202210844376.5A 2021-12-24 2022-07-19 Auxiliary ball hitting device Pending CN115350461A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2021115962451 2021-12-24
CN202111596245 2021-12-24

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Publication Number Publication Date
CN115350461A true CN115350461A (en) 2022-11-18

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CN202210844376.5A Pending CN115350461A (en) 2021-12-24 2022-07-19 Auxiliary ball hitting device

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CN (1) CN115350461A (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200232877Y1 (en) * 2001-01-26 2001-09-29 최문현 A racket assisting apparatus for strengthening of arm muscles and preventing of an elbow
CN202478526U (en) * 2012-01-20 2012-10-10 程可欣 Badminton exercise auxiliary equipment
CN203458774U (en) * 2013-07-05 2014-03-05 杜建 Auxiliary exerciser for loop drive of table tennis
CN103949043A (en) * 2014-05-16 2014-07-30 广东海洋大学 Rod-flag combination type table tennis simulated training aid
CN205108972U (en) * 2015-11-12 2016-03-30 所俊悟 Table tennis training table
CN105727538A (en) * 2016-04-25 2016-07-06 内蒙古民族大学 Badminton training auxiliary device
US20170232323A1 (en) * 2016-02-17 2017-08-17 Shaoxing Kaijian Technology Co., Ltd. Racket-free tennis training device
CN109589578A (en) * 2019-01-28 2019-04-09 南京林业大学 A kind of exercise-equipment of swinging the bat for shuttlecock training
CN212016662U (en) * 2020-03-27 2020-11-27 卢帆 Swing rod assembly and table tennis training device
CN113813581A (en) * 2021-10-14 2021-12-21 陕西国际商贸学院 Tennis training device with rotatable tennis serving function

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200232877Y1 (en) * 2001-01-26 2001-09-29 최문현 A racket assisting apparatus for strengthening of arm muscles and preventing of an elbow
CN202478526U (en) * 2012-01-20 2012-10-10 程可欣 Badminton exercise auxiliary equipment
CN203458774U (en) * 2013-07-05 2014-03-05 杜建 Auxiliary exerciser for loop drive of table tennis
CN103949043A (en) * 2014-05-16 2014-07-30 广东海洋大学 Rod-flag combination type table tennis simulated training aid
CN205108972U (en) * 2015-11-12 2016-03-30 所俊悟 Table tennis training table
US20170232323A1 (en) * 2016-02-17 2017-08-17 Shaoxing Kaijian Technology Co., Ltd. Racket-free tennis training device
CN105727538A (en) * 2016-04-25 2016-07-06 内蒙古民族大学 Badminton training auxiliary device
CN109589578A (en) * 2019-01-28 2019-04-09 南京林业大学 A kind of exercise-equipment of swinging the bat for shuttlecock training
CN212016662U (en) * 2020-03-27 2020-11-27 卢帆 Swing rod assembly and table tennis training device
CN113813581A (en) * 2021-10-14 2021-12-21 陕西国际商贸学院 Tennis training device with rotatable tennis serving function

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