CN109224409B

CN109224409B - Table tennis exerciser

Info

Publication number: CN109224409B
Application number: CN201811259024.3A
Authority: CN
Inventors: 陈志凌
Original assignee: University of South China
Current assignee: University of South China
Priority date: 2018-10-26
Filing date: 2018-10-26
Publication date: 2020-03-10
Anticipated expiration: 2038-10-26
Also published as: CN109224409A

Abstract

The utility model provides a table tennis exerciser, comprising a base plate, the bottom surface of the top surface front side fixed connection riser of bottom plate, bottom plate and riser structure as an organic whole, the top of bottom plate is equipped with the fly leaf, the fly leaf is parallel to each other with the bottom plate, the first gyro wheel of bottom surface four corners difference fixed mounting of fly leaf, the periphery of first gyro wheel all cooperates with the top surface contact of bottom plate, the front end of the back fixed connection several extension spring of riser, the rear end of extension spring all with the preceding fixed connection of fly leaf, the spout is seted up to the top surface of fly leaf, the top surface and the both ends of spout all communicate with each other with the external world, be equipped with the draw runner in the spout, the draw runner can follow the horizontal slip of spout, the bottom surface of the top surface fixed connection floor of draw runner, the bottom surface of the. The invention has more possibilities and more diversified training modes, and the user is about to face more complex motion relation, thereby being beneficial to training the on-site strain ability of the user and especially being capable of training the serve level of the user.

Description

Table tennis exerciser

Technical Field

The invention belongs to the field of sports facilities, and particularly relates to a table tennis trainer.

Background

Table tennis originates in the united kingdom. It soon appeared to be a devastating hot exercise. As chinese players have been excellent in table tennis programs for many years, table tennis has gradually become a chinese ball in china. In the process of practice, an object needs to be matched with the ball dispenser, and along with the development of science and technology, the ball dispenser gradually walks into a training field to supply balls to the ball dispenser, but the ball dispenser is rigid in ball supply mode and low in flexibility, and is not beneficial to actual combat confrontation of the ball dispenser.

Disclosure of Invention

The invention provides a table tennis trainer which is used for solving the defects in the prior art.

The invention is realized by the following technical scheme:

a table tennis exerciser comprises a bottom plate, wherein the front side of the top surface of the bottom plate is fixedly connected with the bottom surface of a vertical plate, the bottom plate and the vertical plate are of an integral structure, a movable plate is arranged above the bottom plate and is parallel to the bottom plate, four corners of the bottom surface of the movable plate are respectively and fixedly provided with first rollers, the peripheries of the first rollers are in contact fit with the top surface of the bottom plate, the back surface of the vertical plate is fixedly connected with the front ends of a plurality of tension springs, the rear ends of the tension springs are fixedly connected with the front surface of the movable plate, the top surface of the movable plate is provided with a sliding groove, the top surface and two ends of the sliding groove are communicated with the outside, a sliding strip is arranged in the sliding groove and can horizontally slide along the sliding groove, the top surface of the sliding strip is fixedly connected with the bottom surface of a rib plate, the top surface of the rib plate is fixedly connected with the bottom surface, the back of a U-shaped rod is connected with the front ends of a plurality of rotating shafts through bearings, the distance between every two adjacent rotating shafts is equal, the rear end of one rotating shaft is fixedly connected with an output shaft of a power device, a first gear and a belt wheel are fixedly installed on the periphery of each rotating shaft, the belt wheels are positioned behind the first gears and are connected through a conveying belt, a plurality of sliding seats with fixing devices are detachably installed on the periphery of the U-shaped rod, the sliding seats are of U-shaped structures, the U-shaped rod penetrates through the sliding seats, openings of the sliding seats face backwards, square plates are fixedly installed on the inner sides of the sliding seats respectively and are positioned in the U-shaped rod, through holes are formed in the front of the square plates respectively, the inner walls of the through holes are connected with the periphery of connecting shafts through bearings respectively, second gears are fixedly installed at the rear ends of the connecting shafts respectively, the second gears can be meshed with the corresponding first gears respectively, the top surface fixed mounting motor of fly leaf, the motor is the biax motor, and the lower output shaft of motor passes from the bottom plate, and the top surface of cam is fixed connection to the lower output shaft bottom surface of motor, and the back of riser passes through wheel carrier installation pulley, and the periphery of pulley and the periphery contact cooperation of cam, the last output shaft top surface fixed mounting reciprocating motion device of motor.

As above a table tennis exerciser, reciprocating motion device include the carousel, the projection, driving lever and arc rack, the bottom surface of the last output shaft top surface fixed connection carousel of motor, the central line collineation of the last output shaft of carousel and motor, the lower extreme of the eccentric department fixed connection projection of top surface of carousel, the articulated bottom surface of connecting the driving lever is passed through to the top surface of fly leaf, the driving lever is located the top of motor, the concave surface of the front end fixed connection arc rack of driving lever, the tooth's socket is seted up to the convex surface of arc rack, arc rack and rack toothing, the top surface of driving lever is seted up the strip and is passed through the groove, the projection is located the strip and passes through the inslot, and the periphery of projection and the contact cooperation of the inner.

According to the table tennis trainer, the fixing device is a bolt, the outer sides of the sliding seats are respectively provided with screw holes, the screw holes are respectively communicated with the inner parts of the corresponding sliding seats, the screw holes are internally provided with the bolts in a threaded manner, and the inner ends of the bolts are in close contact fit with the periphery of the U-shaped rod.

According to the table tennis trainer, the bolt is a butterfly bolt.

According to the table tennis trainer, the belt wheels are V-shaped belt wheels, and the conveying belt is a V-shaped conveying belt.

According to the table tennis trainer, the four corners of the bottom surface of the bottom plate are respectively and fixedly provided with the second rollers with the locking devices.

According to the table tennis trainer, the two sides of the top surface of the bottom plate are respectively provided with the longitudinal guide grooves, and the bottom of the periphery of the first roller is respectively positioned in the corresponding guide grooves.

According to the table tennis trainer, the sliding groove is an inverted T-shaped groove, and the sliding strip is an inverted T-shaped strip.

According to the table tennis trainer, the front surface and the rear surface of the rib plate are respectively provided with the supporting wheels through the wheel carrier, and the peripheries of the supporting wheels are in contact fit with the top surface of the movable plate.

According to the table tennis trainer, the sponge pads are fixedly arranged in front of the baffle plates respectively, and the rubber is fixedly arranged in front of the sponge pads respectively.

The invention has the advantages that: according to the invention, the position of the sliding seat is adjusted by the user, so that the sliding seat is irregularly placed, the U-shaped rod horizontally and longitudinally moves while the baffle plate rotates, the difficulty of playing balls by the user is further improved, and the ball skill of the user is effectively trained. The user starts the motor and the positive and negative rotation motor simultaneously, the motor drives the cam and the reciprocating motion device to rotate simultaneously, the periphery of the cam is contacted and matched with the periphery of the pulley all the time, so as to drive the movable plate to reciprocate back and forth, meanwhile, the reciprocating motion device can drive the rack to reciprocate horizontally, the rack drives the U-shaped rod to reciprocate horizontally, meanwhile, the positive and negative rotation motor drives the corresponding belt wheel to rotate, all the belt wheels synchronously rotate through the transmission of the conveyor belt, the belt wheel drives the rotating shaft to rotate, the rotating shaft drives the first gear to rotate, the first gear drives the second gear to rotate, so as to drive the connecting shaft to rotate, further, the purpose of rotating the baffle plates is realized, the baffle plates are matched in a staggered mode so as to avoid mutual collision, gaps are reserved among a plurality of rotating baffle plates, the user trains a ball to pass through the gaps, or the ball to strike the, the ball skill of the user can be effectively improved. The pulley and the cam are mutually matched, and the friction force between the pulley and the cam is extremely small, so that the movable plate can move smoothly; on the premise that the first roller effectively supports the movable plate, the friction force between the movable plate and the bottom plate can be reduced, and the movable plate can move smoothly; the tension spring always gives the movable plate a tension towards the vertical plate so that the movable plate can move forwards; the invention has the advantages that the slide bar is matched with the sliding groove, the reciprocating movement of the rack can be stabilized, the rib plate is used for connecting the slide bar and the rack, the U-shaped rod is used for installing the rotating shaft, the first gear and the belt wheel, the sliding seat can be moved freely from the U-shaped rod, the position of the sliding seat can be fixed through the fixing device, only the second gear can be meshed with the first gear, the situation that a user is accustomed to the position of the baffle plate to form a dead plate loop type response is prevented, the rotating baffle plate can rotate the ball after rebounding the ball, the 'spin ball' effect is generated, the training mode is more flexible and changeable, the user can adjust the training difficulty according to the increase and decrease of the sliding seat and the baffle plate on the sliding seat, compared with the traditional ball dispenser, the invention has more possibilities and more diversified training modes, the user can face more complex motion relation, and the training ability of the user, especially, the pitching level of the user can be trained, the pitching angle and the skill of the user can be better drilled, the user can have the advantages of forehand in real time to a great extent, and then the foundation is laid for winning the match.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention; FIG. 2 is an enlarged view of the view from the direction A of FIG. 1; FIG. 3 is an enlarged view of the view of FIG. 1 taken along line B; FIG. 4 is an enlarged view of the view of FIG. 2 in the direction C; fig. 5 is an enlarged view of the view from direction D of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.

A table tennis trainer comprises a bottom plate 1, wherein the front side of the top surface of the bottom plate 1 is fixedly connected with the bottom surface of a vertical plate 2, the bottom plate 1 and the vertical plate 2 are of an integral structure, a movable plate 3 is arranged above the bottom plate 1, the movable plate 3 is parallel to the bottom plate 1, four corners of the bottom surface of the movable plate 3 are respectively and fixedly provided with a first roller 4, the periphery of the first roller 4 is in contact fit with the top surface of the bottom plate 1, the back surface of the vertical plate 2 is fixedly connected with the front ends of a plurality of tension springs 5, the rear ends of the tension springs 5 are fixedly connected with the front surface of the movable plate 3, the top surface of the movable plate 3 is provided with a chute 6, the top surface and two ends of the chute 6 are communicated with the outside, a slide bar 7 is arranged in the chute 6, the slide bar 7 can horizontally slide along the chute 6, the top surface of the slide bar 7 is fixedly connected with the bottom surface of a rib, the opening of a U-shaped rod 10 faces downwards, two ends of the U-shaped rod 10 are fixedly connected with the top surface of a rack 9, the back surface of the U-shaped rod 10 is connected with the front ends of a plurality of rotating shafts 11 through bearings, the distance between every two adjacent rotating shafts 11 is equal, the rear end of one rotating shaft 11 is fixedly connected with an output shaft of a power device, the power device is a forward and reverse rotating motor, a first gear 12 and a belt wheel 13 are fixedly installed on the periphery of each rotating shaft 11, the belt wheel 13 is positioned behind the first gear 12, the belt wheels 13 are connected through a conveyor belt 31, a plurality of sliding seats 14 with fixing devices are detachably installed on the periphery of the U-shaped rod 10, the sliding seats 14 are of a U-shaped structure, the U-shaped rod 10 penetrates through the sliding seats 14, the opening of the sliding seats 14 faces backwards, square plates 15 are fixedly installed on the inner sides of the sliding seats 14 respectively, the square plates 15 are positioned in the U-shaped rod 10, through holes 16 are formed in, the rear end of the connecting shaft 17 is fixedly provided with a second gear 18, the second gear 18 can be meshed with the corresponding first gear 12, the front end of the connecting shaft 17 is fixedly connected with the back eccentric position of the baffle 19, the top surface of the movable plate 3 is fixedly provided with a motor 20, the motor 20 is a double-shaft motor, the lower output shaft of the motor 20 penetrates through the bottom plate 1, the bottom surface of the lower output shaft of the motor 20 is fixedly connected with the top surface of a cam 21, the back surface of the vertical plate 2 is provided with a pulley 22 through a wheel carrier, the periphery of the pulley 22 is in contact fit with the periphery of the cam 21, the top surface of the upper output shaft of the motor 20 is fixedly provided with a reciprocating device, and the reciprocating device. According to the invention, the position of the sliding seat 14 is adjusted by the user, so that the sliding seat 14 is irregularly placed, the U-shaped rod 10 horizontally and longitudinally moves while the baffle plate 19 rotates, the difficulty of playing balls by the user is further improved, and the ball skill of the user is effectively trained. A user starts the motor 20 and the forward and reverse rotating motor simultaneously, the motor 20 drives the cam 21 and the reciprocating device to rotate simultaneously, the periphery of the cam 21 is in contact fit with the periphery of the pulley 22 all the time, so as to drive the movable plate 3 to reciprocate back and forth, the reciprocating device can drive the rack 9 to reciprocate horizontally, the rack 9 drives the U-shaped rod 10 to reciprocate horizontally, meanwhile, the forward and reverse rotating motor drives the corresponding belt wheel 13 to rotate, all the belt wheels 13 synchronously rotate through the transmission of the conveyor belt 31, the belt wheel 13 drives the rotating shaft 11 to rotate, the rotating shaft 11 drives the first gear 12 to rotate, the first gear 12 drives the second gear 18 to rotate, so as to drive the connecting shaft 17 to rotate, and further, the purpose of rotating the baffle plates 19 is realized, the baffle plates 19 should be in staggered fit to avoid mutual collision, the effect can be realized by adjusting the length of the connecting shaft 17, and gaps, the user can train the ball to pass through the gap or hit the rotating baffle 19, which can effectively improve the ball skill of the user. The pulley 22 and the cam 21 are mutually matched, and the friction force between the two is extremely small, so that the smooth movement of the movable plate 3 is facilitated; on the premise that the first roller 4 effectively supports the movable plate 3, the friction force between the movable plate 3 and the bottom plate 1 can be reduced, and smooth movement of the movable plate 3 is facilitated; the tension spring 5 always gives the movable plate 3 a pulling force towards the vertical plate 2 so as to facilitate the movable plate 3 to move forwards; the sliding strip 7 and the sliding groove 6 are matched with each other, the rack 9 can be moved stably in a reciprocating manner, the rib plate 8 is used for connecting the sliding strip 7 and the rack 9, the U-shaped rod 10 is used for installing the rotating shaft 11, the first gear 12 and the belt wheel 13, the sliding seat 14 can be moved freely from the U-shaped rod 10, the position of the sliding seat 14 can be fixed through the fixing device, as long as the second gear 18 can be meshed with the first gear 12, the user can be prevented from forming a dead plate loop type response after being accustomed to the position of the baffle plate 19, the ball can be rotated after being rebounded by the rotating baffle plate 19, the 'spin ball' effect is generated, the training mode is more flexible and changeable, the user can increase or decrease the training difficulty according to the sliding seat 14 and the baffle plate 19 on the sliding seat, compared with the traditional ball dispenser, the invention has more possibilities and more diversified training modes, and the user is about to face more complicated motion relations, the training device is beneficial to training the on-site strain capacity of the user, especially can train the serve level of the user, can make the serve angle and the skill of the user more accurate, and can make the user have the advantages of forehand in real war to a great extent, thereby laying the foundation for winning the match.

Specifically, as shown in fig. 4, the reciprocating device described in this embodiment includes a rotary table 23, a protruding column 24, a shift lever 25 and an arc-shaped rack 26, the top surface of the upper output shaft of the motor 20 is fixedly connected to the bottom surface of the rotary table 23, the central line of the upper output shaft of the rotary table 23 and the central line of the upper output shaft of the motor 20 are collinear, the eccentric position of the top surface of the rotary table 23 is fixedly connected to the lower end of the protruding column 24, the top surface of the movable plate 3 is hinged to the bottom surface of the shift lever 25 through a hinge shaft, the shift lever 25 is located above the motor 20, the front end of the shift lever 25 is fixedly connected to the concave surface of the arc-shaped rack 26, the convex surface of the arc-shaped rack 26 is provided with a tooth space, the arc-shaped rack 26 is engaged with the. When the motor 20 drives the turntable 23 to rotate, the turntable 23 drives the convex column 24 to rotate, and the convex column 24 is located at the eccentric position of the turntable 23, and the convex column 24 is located in the strip-shaped through groove 28, so that when the convex column 24 rotates by taking the turntable 23 as the center, the driving rod 25 can be driven to turn over by taking the hinge shaft as the center, the arc-shaped rack 26 is always meshed with the rack 9, the rack 9 can be driven to reciprocate, the structure can effectively drive the rack 9 to move, the structure is simplified, and the production and manufacturing cost of the invention can be effectively controlled.

Specifically, as shown in fig. 5, the fixing device in this embodiment is a bolt 29, the outer sides of the sliding seats 14 are respectively provided with screw holes 30, the screw holes 30 are respectively communicated with the inner portions of the corresponding sliding seats 14, the bolt 29 is respectively installed in the screw holes 30 in a threaded manner, and the inner ends of the bolts 29 are respectively in close contact fit with the outer periphery of the U-shaped rod 10. The user can fix the sliding seat 14 on the U-shaped rod 10 by screwing the bolt 29, the structure is simple, the user can operate the U-shaped rod conveniently, the design cost is low, and the manufacturing cost of the U-shaped rod can be reduced.

Further, as shown in fig. 1 or 5, the bolt 29 according to the present embodiment is a butterfly bolt. This structure can give the user a point of being convenient for to have an effect, and the user can screw up bolt 29 with the hand, need not with the help of the instrument, and is more convenient, nimble.

Further, as shown in fig. 2, the pulleys 13 of the present embodiment are all V-shaped pulleys, and the transmission belt 31 is a V-shaped transmission belt. The larger contact area between the V-shaped belt and the V-shaped pulley, i.e. the larger friction force between the pulley 13 and the belt 31, means that the pulley 13 and the belt 31 do not slide relatively, and the operation stability of the present invention can be further improved.

Furthermore, as shown in fig. 1, the bottom plate 1 of the present embodiment is fixedly provided with second rollers 32 having locking devices at four corners of the bottom surface. The structure can facilitate the movement of the invention, thereby enhancing the movement flexibility of the invention, and the locking device can prevent the invention from moving under the non-manual action, so as to ensure the invention to have enough stability when in use.

Furthermore, as shown in fig. 2, longitudinal guide grooves 33 are respectively formed on two sides of the top surface of the bottom plate 1, and the bottom of the outer periphery of the first roller 4 is respectively located in the corresponding guide grooves 33. The first roller 4 is always located in the guide groove 3 to prevent the movable plate 3 from being laterally displaced, so that the operation stability of the present invention can be further enhanced.

Further, as shown in fig. 2, the sliding groove 6 of the present embodiment is an inverted T-shaped groove, and the sliding strip 7 is an inverted T-shaped strip. The periphery of the inverted T-shaped strip is in contact fit with the inner wall of the inverted T-shaped groove, and the inverted T-shaped strip horizontally slides along the inverted T-shaped groove, so that the connection stability between the sliding groove 6 and the sliding strip 7 can be further enhanced, the structural stability of the invention is enhanced, and the U-shaped rod 10 is prevented from shaking.

Further, as shown in fig. 2, the front and rear surfaces of the rib plate 8 of the present embodiment are respectively provided with supporting wheels 27 by wheel carriers, and the outer peripheries of the supporting wheels 27 are in contact fit with the top surface of the movable plate 3. The structure can avoid the rib plate 8 from shaking back and forth, thereby further enhancing the running stability of the invention.

Furthermore, in order to prevent the table tennis from damaging the baffle 19, sponge pads are fixedly arranged in front of the baffle 19 respectively, and rubber is fixedly arranged in front of the sponge pads respectively. This structure imitates the table tennis bat structure and makes, rebounds after the table tennis strikes baffle 19, and because the effect of foam-rubber cushion and rubber, the table tennis can not damage.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A table tennis exerciser which is characterized in that: comprises a bottom plate (1), the front side of the top surface of the bottom plate (1) is fixedly connected with the bottom surface of a vertical plate (2), the bottom plate (1) and the vertical plate (2) are of an integral structure, a movable plate (3) is arranged above the bottom plate (1), the movable plate (3) and the bottom plate (1) are parallel to each other, four corners of the bottom surface of the movable plate (3) are respectively and fixedly provided with first rollers (4), the periphery of each first roller (4) is in contact fit with the top surface of the bottom plate (1), the back surface of the vertical plate (2) is fixedly connected with the front ends of a plurality of tension springs (5), the rear ends of the tension springs (5) are respectively and fixedly connected with the front surface of the movable plate (3), the top surface of the movable plate (3) is provided with a sliding groove (6), the top surface and two ends of the sliding groove (6) are communicated with the outside, a sliding strip (7) is arranged in the sliding groove (6), the sliding, the top surface of a rib plate (8) is fixedly connected with the bottom surface of a rack (9), the tooth grooves of the rack (9) face backwards, a U-shaped rod (10) is arranged above the rack (9), the opening of the U-shaped rod (10) faces downwards, two ends of the U-shaped rod (10) are fixedly connected with the top surface of the rack (9), the back surface of the U-shaped rod (10) is connected with the front ends of a plurality of rotating shafts (11) through bearings, the distance between every two adjacent rotating shafts (11) is equal, the rear end of one rotating shaft (11) is fixedly connected with an output shaft of a power device, a first gear (12) and a belt wheel (13) are fixedly arranged on the periphery of each rotating shaft (11), the belt wheels (13) are positioned behind the first gear (12), the belt wheels (13) are connected through a conveyor belt (31), a plurality of sliding seats (14) with fixing devices are detachably arranged on the periphery of the U-shaped rod (10), and the sliding, the U-shaped rod (10) penetrates through the sliding seat (14), the openings of the sliding seat (14) face backwards, a square plate (15) is fixedly installed on the inner side of the sliding seat (14) respectively, the square plate (15) is located in the U-shaped rod (10), through holes (16) are formed in the front of the square plate (15) respectively, the inner walls of the through holes (16) are connected with the periphery of a connecting shaft (17) through bearings respectively, a second gear (18) is fixedly installed at the rear end of the connecting shaft (17) respectively, the second gear (18) can be meshed with a corresponding first gear (12) respectively, the front end of the connecting shaft (17) is fixedly connected with the back eccentric position of a baffle plate (19) respectively, a motor (20) is fixedly installed on the top surface of the movable plate (3), the motor (20) is a double-shaft motor, the lower output shaft of the motor (20) penetrates through the bottom plate (1), the bottom surface of the lower output shaft of the motor, the back of the vertical plate (2) is provided with a pulley (22) through a wheel carrier, the periphery of the pulley (22) is in contact fit with the periphery of the cam (21), and the top surface of an upper output shaft of the motor (20) is fixedly provided with a reciprocating motion device.

2. The table tennis exerciser of claim 1, wherein: the reciprocating motion device comprises a turntable (23), a convex column (24), a shifting rod (25) and an arc-shaped rack (26), the top surface of an upper output shaft of a motor (20) is fixedly connected with the bottom surface of the turntable (23), the center line of the upper output shaft of the turntable (23) and the center line of the upper output shaft of the motor (20) are collinear, the eccentric position of the top surface of the turntable (23) is fixedly connected with the lower end of the convex column (24), the top surface of a movable plate (3) is hinged with the bottom surface of the shifting rod (25) through a hinge shaft, the shifting rod (25) is positioned above the motor (20), the front end of the shifting rod (25) is fixedly connected with the concave surface of the arc-shaped rack (26), a tooth groove is formed on the convex surface of the arc-shaped rack (26), the arc-shaped rack (26) is meshed with a rack (9), a strip-, and the periphery of the convex column (24) is in contact fit with the inner wall of the strip-shaped through groove (28).

3. The table tennis exerciser of claim 1, wherein: the fixing device is a bolt (29), the outer side of each sliding seat (14) is provided with a screw hole (30), the screw holes (30) are communicated with the inner parts of the corresponding sliding seats (14), the bolt (29) is installed in each screw hole (30) in a threaded mode, and the inner end of each bolt (29) is in close contact fit with the periphery of the U-shaped rod (10).

4. The table tennis exerciser of claim 3, wherein: the bolt (29) is a butterfly bolt.

5. The table tennis exerciser of claim 1, wherein: the belt wheels (13) are V-shaped belt wheels, and the conveying belt (31) is a V-shaped conveying belt.

6. The table tennis exerciser of claim 1, wherein: and four corners of the bottom surface of the bottom plate (1) are respectively and fixedly provided with second rollers (32) with locking devices.

7. The table tennis exerciser of claim 1, wherein: longitudinal guide grooves (33) are formed in two sides of the top surface of the bottom plate (1) respectively, and the bottom of the periphery of the first roller (4) is located in the corresponding guide grooves (33) respectively.

8. The table tennis exerciser of claim 1, wherein: the sliding groove (6) is an inverted T-shaped groove, and the sliding strip (7) is an inverted T-shaped strip.

9. The table tennis exerciser of claim 1, wherein: the front and back surfaces of the ribbed plate (8) are respectively provided with a supporting wheel (27) through a wheel carrier, and the periphery of the supporting wheel (27) is in contact fit with the top surface of the movable plate (3).

10. The table tennis exerciser of claim 1, wherein: sponge cushions are respectively and fixedly arranged in front of the baffle plates (19), and rubber is respectively and fixedly arranged in front of the sponge cushions.