CN108992880B

CN108992880B - Foldable tennis post

Info

Publication number: CN108992880B
Application number: CN201810912830.XA
Authority: CN
Inventors: 李菊红
Original assignee: Taizhou Huangyan Chenming Plastic Industry Co Ltd
Current assignee: Taizhou Huangyan Chenming Plastic Industry Co., Ltd
Priority date: 2018-08-13
Filing date: 2018-08-13
Publication date: 2020-09-25
Anticipated expiration: 2038-08-13
Also published as: CN108992880A

Abstract

The invention provides a foldable tennis post, which belongs to the field of sports equipment and comprises a post body, wherein a blocking net is wound on the outer side of the post body, and one end of the blocking net is connected to the post body; the outer side of the column body is further provided with a supporting rod, one end of the supporting rod is hinged to the bottom of the column body, and the supporting rod is of a telescopic structure. The external part of the tennis post is provided with a blocking net which can be unfolded for use; the outside of the column body is also provided with a support rod which can be matched with the blocking net for use; the tennis posts with the structures are matched, so that a tennis court can be quickly formed. Its structural design is reasonable, can fold, convenient storage.

Description

Foldable tennis post

Technical Field

The invention relates to the field of sports equipment, in particular to a foldable tennis post.

Background

Tennis is a popular sport at present, and is also a relatively professional sport, and the practice of mastering the tennis needs a certain period of time. Meanwhile, the tennis court is large, so that the use cost of the tennis court is high, so that a beginner needs to pay more learning cost when contacting tennis, and the enthusiasm of people in playing tennis is restricted to a certain extent.

Therefore, at present, some portable tennis stands are available, and users can support the stands on the open ground to practice tennis, so that less learning cost can be paid in the practice process, and convenience is brought to the users. However, the existing tennis stand is simple in structure and inconvenient to use.

Disclosure of Invention

The invention provides a foldable tennis post, which aims to solve the problems in the prior art.

The invention is realized by the following steps:

a foldable tennis column comprises a column body, wherein a barrier net is wound on the outer side of the column body, and one end of the barrier net is connected to the column body; the outer side of the column body is further provided with a supporting rod, one end of the supporting rod is hinged to the bottom of the column body, and the supporting rod is of a telescopic structure.

Further, the tip of bracing piece is provided with the connector, the connector can be dismantled with the bracing piece and be connected, the connector is both ends open-ended structure.

Further, the inside two annular spread grooves that are provided with of connector, the tip of bracing piece is provided with a bulge loop, the bulge loop is connected one in the spread groove, distance between two spread grooves is greater than the bulge loop extremely distance between the tip of bracing piece.

Furthermore, a sleeve is sleeved outside the column body, the blocking net is covered inside the sleeve, an annular supporting table is arranged outside the column body, and the bottom of the sleeve is placed on the supporting table; the support rod is located outside the sleeve.

Furthermore, a pedal is arranged at the bottom of the column body, one end of the pedal is hinged with the column body, a return spring is arranged between the middle of the pedal and the column body, and a pawl is arranged on one side of the pedal; the bottom of the column body is also provided with a driving wheel, one side of the driving wheel, which faces the pedal, is provided with a plurality of tooth sockets, and the pawl is clamped in the tooth sockets; the transmission wheel is connected with a rotating shaft, the top of the column body is provided with a driven shaft parallel to the rotating shaft, and the rotating shaft and the driven shaft are connected through a transmission chain;

a lifting table is arranged in the accommodating cavity, sliding holes and straight teeth are respectively arranged on two opposite sides of the lifting table, a sliding rod is vertically arranged in the column body and penetrates through the sliding holes, and transmission teeth are arranged on the outer side of the transmission chain and meshed with the straight teeth; an adjusting rod is arranged at the bottom of the column body and is positioned above the space between the pedal and the driving wheel, one end of the adjusting rod is hinged with the column body, and a tension spring is connected between the middle part of the adjusting rod and the column body; the adjusting rod is stirred downwards to enable the adjusting rod to be in contact with the pawl and enable the pawl to be separated from the tooth groove.

Furthermore, the extension spring is located the top of adjusting the pole, the spring that resets is located the below of footboard.

Furthermore, a bottom cover is arranged at the position, close to the bottom, of the side portion of the column body, a groove is formed in one side of the bottom cover, and the pedal, the reset spring and the adjusting rod are located in the groove.

Further, the top of the pedal is spaced from the top of the groove, and one end of the pedal extends to the outside of the groove.

The foldable tennis post provided by the invention is provided with the blocking net outside, and can be unfolded for use; the outside of the column body is also provided with a support rod which can be matched with the blocking net for use; the tennis posts with the structures are matched, so that a tennis court can be quickly formed. Its structural design is reasonable, can fold, convenient storage.

Drawings

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

Fig. 1 is a schematic front view of a multifunctional tennis post provided in an embodiment of the present invention;

fig. 2 is a schematic bottom view of a multifunctional tennis ball stand provided in an embodiment of the present invention;

fig. 3 is a schematic top view of a column in a multifunctional tennis post provided in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a transmission mechanism in a multifunctional tennis ball stand provided by an embodiment of the invention;

fig. 5 is a schematic structural view of a column bottom in the multifunctional tennis column provided in the embodiment of the present invention;

fig. 6 is a schematic front view of a driving wheel in the multifunctional tennis upright provided by the embodiment of the invention;

fig. 7 is a schematic structural view illustrating the connection between the end of the support rod and the connector in the multifunctional tennis post according to the embodiment of the present invention;

fig. 8 is a schematic structural view of the multifunctional tennis post provided by the embodiment of the invention after the barrier net is pulled out.

Summary of reference numerals: the device comprises a column 11, a sleeve 12, a pedal 13, a support rod 14, a surrounding cylinder 15, an accommodating groove 16, a support foot 17, a barrier net 18, a through groove 19, a connecting sleeve 20, a support table 21, a connecting strip 22, a magnetic block 23, an accommodating cavity 24, a cover plate 25, a lifting table 26, a sliding rod 27, a transmission chain 28, a sliding hole 29, straight teeth 30, a return spring 31, a pawl 32, a transmission wheel 33, a tooth groove 34, a rotating shaft 35, a driven shaft 36, an adjusting rod 37, a tension spring 38, a groove 39, a damping block 40, a connecting head 41, a connecting groove 42, a convex ring 43, a bottom cover 44, a lug 45 and a.

Detailed Description

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 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.

Please refer to fig. 1-8.

The embodiment provides a foldable tennis post, which is provided with a blocking net outside and can be unfolded for use; the outside of the column body is also provided with a support rod which can be matched with the blocking net for use; the tennis posts with the structures are matched, so that a tennis court can be quickly formed. Its structural design is reasonable, can fold, convenient storage.

As shown in fig. 1, the multifunctional tennis upright comprises a column body 11, wherein a surrounding tube 15 is arranged at the bottom of the column body 11, a receiving groove 16 is formed inside the surrounding tube 15, a plurality of supporting feet 17 are arranged in the receiving groove 16, and one end of each supporting foot 17 is hinged to the bottom of the column body 11; the outside of the column 11 is provided with a barrier net 18, one end of the barrier net 18 being attached to the column 11.

As shown in fig. 2, the number of the supporting legs 17 is three, three through slots 19 adapted to the supporting legs 17 are formed on the enclosure tube 15, and the supporting legs 17 are of a telescopic structure. A support rod 14 is arranged on the outer side of the column body 11, and one end of the support rod 14 is hinged to the bottom end of the column body 11; the support rod 14 is a telescopic structure and has a plurality of telescopic rod bodies connected with each other. The end of the supporting rod 14 is provided with a connector 41, the connector 41 has a structure with two open ends, two annular connecting grooves 42 are arranged inside the connector 41, the end of the supporting rod 14 is provided with a convex ring 43, and the convex ring 43 is connected inside one connecting groove 42. The distance between the two connecting grooves 42 is greater than the distance between the collar 43 and the end of the support bar 14.

As shown in fig. 8, the barrier net 18 is wound around the outside of the column 11, the column 11 is sleeved with the sleeve 12, and the sleeve 12 covers the barrier net 18 inside. The barrier net 18 is provided with a first end and a second end, the first end is provided with a connecting sleeve 20, the outer side of the column body 11 is provided with an insert rod, and the insert rod is inserted into the connecting sleeve 20; the second end is provided with a connecting bar 22, and a plurality of magnetic blocks 23 are distributed in the connecting bar 22 at intervals.

The outer side of the column 11 forms a support platform 21, the barrier net 18 is located above the support platform 21, and the bottom of the sleeve 12 rests on the support platform 21.

As shown in fig. 3-5, the cylinder 11 is internally provided with a containing cavity 24, the top of the cylinder 11 is provided with an opening, and the top of the sleeve 12 is provided with a cover plate 25 which is detachably connected with the sleeve; a lifting platform 26 is arranged in the accommodating cavity 24, the lifting platform 26 is disc-shaped, and a circular groove 46 is formed in the middle of the lifting platform 26 and used for placing tennis balls; a slide rod 27 and a transmission chain 28 are vertically arranged in the column body 11, the slide rod 27 and the transmission chain 28 are respectively arranged on two sides of the lifting platform 26, one side of the lifting platform 26 is provided with a slide hole 29, the slide rod 27 passes through the slide hole 29, the other side of the lifting platform 26 is provided with a straight tooth 30, the outer side of the transmission chain 28 is provided with a transmission tooth, and the transmission tooth is meshed with the straight tooth 30; the two lugs 45 are provided on both sides of the lifting table 26, the slide hole 29 is provided on one lug 45, and the spur 30 is provided on the other lug 45.

A pedal 13 is arranged at the bottom of the column body 11, one end of the pedal 13 is hinged with the column body 11, a return spring 31 is arranged between the middle part of the pedal 13 and the column body 11, the return spring is positioned below the pedal 13, and a pawl 32 is arranged at one side of the pedal 13; the bottom of the column body 11 is also provided with a transmission wheel 33, one side of the transmission wheel 33 facing the pedal 13 is provided with a plurality of tooth sockets 34, and the pawls 32 are clamped in the tooth sockets 34; the transmission wheel 33 is connected with a rotating shaft 35, a driven shaft 36 parallel to the rotating shaft 35 is arranged at the top of the column body 11, and the transmission chain 28 is sleeved on the rotating shaft 35 and the driven shaft 36.

At least 12 of the tooth grooves 34 are arranged, and the tooth grooves 34 are obliquely arranged. The rotation axis of the pedal 13 is horizontal, the rotating shaft 35 is also arranged along the horizontal direction, and the rotating shaft 35 is engaged with the transmission chain 28.

As shown in fig. 5, an adjusting rod 37 is disposed at the bottom of the column 11, the adjusting rod 37 is located above the space between the pedal 13 and the driving wheel 33, one end of the adjusting rod 37 is hinged to the column 11, and a tension spring 38 is connected between the middle of the adjusting rod 37 and the column 11; turning the adjustment lever 37 down causes the adjustment lever 37 to contact the pawl 32 and disengage the pawl 32 from the slot 34. The bottom of the column 11 is provided with a bottom cover 44, a groove 39 is arranged in the bottom cover 44, and the pedal 13 and the adjusting rod 37 are positioned in the groove 39. A space is provided between the top of step 13 and the top of recess 39, and one end of step 13 extends outside recess 39.

As shown in fig. 4, the middle of the rotating shaft 35 is rotatably connected to the column 11, a damping block 40 is disposed between one end of the rotating shaft 35 away from the driving wheel 33 and the column 11, and the damping block 40 is attached to the rotating shaft 35.

The two columns 11 can be used together to form a tennis ball stand. A single post 11 may be used to attach the free end of the barrier net 18 to a wall or elsewhere, and also as a tennis net.

The surrounding tube 15 is a part of the bottom of the column body 11, a receiving groove 16 is arranged inside the surrounding tube 15, a supporting leg 17 is arranged in the receiving groove 16, and the column body 11 can be supported through the supporting leg 17. The support legs 17 are accommodated in the accommodation grooves 16 when not in use, and when in use, the support legs 17 are rotated to open the support legs 17 in different directions to support the support legs 17 on the ground, and the plurality of support legs 17 are engaged with each other to stably support the column 11 on the ground.

The outside of the column body 11 is provided with a barrier net 18, and the barrier net 18 is made of flexible materials, has small thickness, is wound outside the column body 11 and occupies small volume.

When the tennis net is used, the two columns 11 are matched, the barrier nets 18 are unfolded from the outer sides of the columns 11 and stretched, and the barrier nets 18 outside the two columns 11 are connected to form a long net, so that tennis can be performed.

Supporting legs 17 are provided with threely, and three supporting legs 17 are the annular and distribute, and supporting legs 17 accomodates in holding tank 16 when not using, and supporting legs 17 outwards overturns during the use, has great laminating area with ground, plays good support to column 11. Three through grooves 19 matched with the supporting legs 17 are formed in the surrounding barrel 15, and when the supporting legs 17 are turned over, the supporting legs 17 can penetrate through the through grooves 19 and can be turned over to the outside of the column 11.

The columns 11 are provided with support bars 14 on the outer sides thereof, and the support bars 14 of the two columns 11 are connected when in use, so that the two columns 11 are restrained by the support bars 14, and the columns 11 are prevented from approaching or falling down under the tensile force of the barrier net 18, so that the columns 11 are kept stable.

The supporting rod 14 is in a strip shape and is provided with a plurality of rod bodies which can be connected in a telescopic mode, the supporting rod 14 is shorter after being contracted, and the supporting rod is longer after being expanded. The support bar 14 is in an upright position when not in use, substantially parallel to the column 11. In use, the support pole 14 is turned to a horizontal state, and the support pole 14 is stretched to the longest.

The ends of the support rods 14 are provided with connectors 41 to enable the ends of the two support rods 14 to be connected. The connector 41 is a hollow structure, and both ends of the connector 41 have openings, and the end of the support rod 14 can be inserted into either end of the connector 41. And two connecting grooves 42 are arranged inside the connecting head 41, so that the convex ring 43 at the end of the supporting rod 14 is connected inside the connecting grooves 42, and the connecting head 41 and the supporting rod 14 can be stably connected.

When connecting two support rods 14, only one connector 41 is used. The ends of the two support rods 14 are inserted into the two ends of the connector 41, and the protruding rings 43 at the ends of the support rods 14 are inserted into the connecting grooves 42 of the connector 41, so that the connector 41 is connected to the support rods 14.

Figure 8 shows the barrier net 18 and the support rods 14 of one column 11 deployed. During the specific use, two cylinders 11 cooperate, link to each other the tip of two bracing pieces 14, make bracing piece 14 play the supporting role to two cylinders 11 in the bottom, make two cylinders 11 can bear and overcome the gravity of block 18, make cylinder 11 can stably stand subaerial.

The post 11 is externally provided with a sleeve 12, and the sleeve 12 covers the barrier net 18 therein, so that the barrier net 18 can be protected, and the barrier net 18 does not fall off from the post 11 when not in use, and cannot be scraped by other objects when in transportation.

The barrier net 18 has two ends, one end of which is attached to the side of the column 11 and the other end of which is adapted to be attached to another barrier net 18. The barrier net 18 has a connector 20 at a first end and a spigot (not shown) is provided on the outside of the column 11 and inserted into the connector 20 to connect the barrier net 18 to the column 11. The second end of the barrier net 18 is provided with a connecting strip 22, a plurality of magnetic blocks 23 are arranged in the connecting strip 22, and when the end parts of the two barrier nets 18 are connected, the magnetic blocks 23 attract each other, so that the end parts of the two barrier nets 18 can be quickly connected. In addition, the column 11 is made of metal, and when the barrier net 18 is wound outside the column 11, the barrier net 18 can be stably wound outside the column 11 by the suction force of the magnetic blocks 23 and is not easy to fall off. The barrier net 18 is further stabilized by the protective action of the sleeve 12.

The cylinder 11 is provided with a hollow structure so that tennis balls can be accommodated therein. The components such as the pedal 13, the transmission chain 28 and the lifting platform 26 are arranged on the column body 11, so that the tennis balls contained in the column body 11 can be conveniently taken out, and convenience can be provided during tennis.

The column 11 has a cylindrical inner cavity inside, and the top of the cylindrical inner cavity is provided with an opening, so that tennis balls loaded in the cylindrical inner cavity can be taken out from the top of the cylindrical inner cavity. When tennis is played in a formal tennis court, the tennis upright post can be used as a container for loading tennis balls, so that the tennis balls are provided for a user, and the number of times for picking up the tennis balls is reduced.

The top of the sleeve 12 is provided with a cover plate 25, the cover plate 25 is detachably connected with the sleeve 12, when the blocking net 18 is not used and the column body 11 is required to be used as a tennis ball container, the cover plate 25 at the top of the sleeve 12 is opened, so that the sleeve 12 can still be sleeved outside the column body 11 to protect the blocking net 18, and tennis balls in the column body 11 can be taken out from the top.

The accommodating cavity 24 is internally provided with a lifting platform 26, and the middle part of the lifting platform 26 is provided with a round groove 46 for conveniently placing tennis balls thereon. The lift table 26 is movable up and down inside the housing cavity 24 so that tennis balls in the housing cavity 24 can be taken out. The lifting platform 26 is provided with lugs 45 at both sides thereof, and the two lugs 45 are respectively provided with a slide hole 29 and a straight tooth 30, so that the lifting platform 26 can be connected with the slide rod 27 and the transmission chain 28. The transmission chain 28 is engaged with the straight teeth 30 arranged at the side part of the lifting platform 26, the lifting platform 26 is driven to move upwards through the engagement relation during the operation process of the transmission chain 28, and the lifting platform 26 can stably carry out lifting motion due to the connection relation of the sliding rod 27 and the sliding hole 29, and is not easy to be clamped in the accommodating cavity 24.

The pedal 13, the transmission wheel 33 and the rotating shaft 35 arranged at the bottom of the column body 11 are matched with the transmission chain 28 to form a transmission mechanism, and the transmission chain 28 works through the transmission mechanism. One end of the pedal 13 is hinged on the column 11 to enable the pedal to rotate, and the middle part of the pedal 13 is connected with the column 11 through a return spring 31 to enable the pedal 13 to automatically return upwards after being stepped.

The edge of the pedal 13 is provided with a pawl 32, a transmission wheel 33 is arranged beside the pedal 13, the axis of the transmission wheel 33 is in the horizontal direction, the side part of the transmission wheel 33 is provided with a plurality of tooth sockets 34, and the end part of the pawl 32 can be clamped into the tooth sockets 34. When the pedal 13 is depressed, the pawl 32 rotates the transmission wheel 33. After the pedal 13 is released, the pedal 13 is reset, the pawl 32 is disengaged from the tooth slot 34, and after the pedal 13 is reset to the highest position, the pawl 32 is re-engaged in the tooth slot 34, and the transmission wheel 33 is kept still in the process. Forming a ratchet mechanism.

The transmission wheel 33 is connected with a rotating shaft 35, the rotating shaft 35 is rotatably connected to the column body 11, and the rotating shaft 35 can be driven to rotate when the transmission wheel 33 rotates. The shaft 36 is provided at the top of the column 11, and both ends of the shaft 36 are connected to the column 11 so that the shaft 36 does not rotate. The transmission chain 28 is sleeved on the rotating shaft 35 and the driven shaft 36, and when the rotating shaft 35 rotates, the transmission chain 28 can be driven to rotate. The rotating shaft 35 and the transmission chain 28 may be engaged by teeth, so that the two are not slipped, and the rotation of the rotating shaft 35 can stably drive the transmission chain 28 to rotate.

When the transmission mechanism is used, the pedal 13 is stepped, the pedal 13 drives the transmission wheel 33 to rotate, the transmission wheel 33 drives the rotating shaft 35 to rotate, the rotating shaft 35 drives the transmission chain 28 to rotate, and the transmission chain 28 drives the lifting platform 26 to move upwards, so that tennis balls placed on the lifting platform 26 can be jacked upwards, and the tennis balls can be taken out one by one.

During the use, the user can be with post 11 standing aside, when needing with the ball, steps on footboard 13 once or many times, makes elevating platform 26 ejecting with a tennis.

After all tennis balls in the accommodation cavity 24 are taken out, the pawl 32 is adjusted to separate the pawl 32 from the tooth socket 34, so that the pawl 32 and the pedal 13 do not obstruct the reverse rotation of the driving wheel 33, the driving wheel 33 can rotate reversely, the driving chain 28 can rotate reversely, the lifting platform 26 can descend to the lowest position, and the ball on the court can be picked up and thrown into the column 11 for reuse.

An adjustment lever 37 is provided at the bottom of the column 11, and the pawls 32 can be quickly disengaged from the teeth grooves 34 by the adjustment lever 37, so that the elevating platform 26 can be quickly lowered.

The end of the adjusting rod 37 is hinged with the column 11, a tension spring 38 is arranged between the middle of the adjusting rod 37 and the column 11, and the adjusting rod 37 is at a higher position, is positioned right above the pawl 32 and is positioned between the pedal 13 and the transmission wheel 33 under the normal state. When the adjustment lever 37 is required to be used, the adjustment lever 37 is pushed down to bring the adjustment lever 37 into contact with the ratchet 32, and the ratchet 32 can be disengaged from the tooth groove 34. After use, the adjustment lever 37 is released and the adjustment lever 37 can be returned to its original position by the tension spring 38. The pawl 32 can also be repositioned to snap into the socket 34.

The detent 32 is a common component. In this embodiment, the pawl 32 is an arc structure, one end of which is hinged to the bottom of the pedal 13, and a spring is connected between the middle of the pawl 32 and the pedal 13. When the pedal 13 moves downwards, the end of the pawl 32 is caught in the tooth groove 34 and drives the transmission wheel 33 to rotate.

The bottom of the column body 11 is provided with a housing which is connected on the column body 11, a groove 39 is formed in the housing, so that the pedal 13 and the adjusting rod 37 can be arranged in the groove 39, and the housing can protect all parts. The size of the column 11 can be made smaller, and the bottom of the column 11 can have a larger fit area with the ground, so that the column 11 is more stable.

In order to prevent the transmission wheel 33 from reversely rotating during the process of restoring the pedal 13 to the original position after the pedal 13 is released, a damping block 40 is provided at the end of the rotating shaft 35. The damping block 40 is attached to the rotating shaft 35, and the damping block 40 has a certain damping effect on the rotation of the rotating shaft 35. The entire process of returning the pedal 13 upward to its original position after releasing the pedal 13 takes a short time, on the order of a fraction of a second, during which the force of the damping mass 40 on the rotary shaft 35 allows the rotary shaft 35 to be temporarily held in this state, ensuring that the rotary shaft 35 does not reverse.

It can be seen that the tennis post with the structure has various functions, can be used as a tennis net and also can be used as a container for containing tennis balls, and a user can select the function according to actual conditions, thereby bringing great convenience to the user.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A foldable tennis column is characterized by comprising a column body, wherein a barrier net is wound on the outer side of the column body, and one end of the barrier net is connected to the column body; the outer side of the column body is also provided with a supporting rod, one end of the supporting rod is hinged to the bottom of the column body, the supporting rod is of a telescopic structure, the end part of the supporting rod is provided with a connector, the connector is detachably connected with the supporting rod, the connector is of a structure with openings at two ends, two annular connecting grooves are arranged inside the connector, the end part of the supporting rod is provided with a convex ring, the convex ring is connected into one connecting groove, and the distance between the two connecting grooves is greater than the distance between the convex ring and the end part of the supporting rod;

a pedal is arranged at the bottom of the column body, one end of the pedal is hinged with the column body, a reset spring is arranged between the middle part of the pedal and the column body, and a pawl is arranged on one side of the pedal; the bottom of the column body is also provided with a driving wheel, one side of the driving wheel, which faces the pedal, is provided with a plurality of tooth sockets, and the pawl is clamped in the tooth sockets; the transmission wheel is connected with a rotating shaft, the top of the column body is provided with a driven shaft parallel to the rotating shaft, and the rotating shaft and the driven shaft are connected through a transmission chain;

an accommodating cavity is formed in the cylinder body, a lifting platform is arranged in the accommodating cavity, sliding holes and straight teeth are respectively formed in two opposite sides of the lifting platform, a sliding rod is vertically arranged in the cylinder body and penetrates through the sliding holes, transmission teeth are arranged on the outer side of the transmission chain and are meshed with the straight teeth; an adjusting rod is arranged at the bottom of the column body and is positioned above the space between the pedal and the driving wheel, one end of the adjusting rod is hinged with the column body, and a tension spring is connected between the middle part of the adjusting rod and the column body; the adjusting rod is stirred downwards to enable the adjusting rod to be in contact with the pawl and enable the pawl to be separated from the tooth groove;

the outer part of the column body is sleeved with a sleeve, the blocking net is covered in the sleeve, an annular supporting table is arranged on the outer side of the column body, and the bottom of the sleeve is placed on the supporting table; the support rod is located outside the sleeve.

2. Foldable tennis post according to claim 1, wherein said tension spring is located above said adjustment lever and said return spring is located below said pedal.

3. Foldable tennis post according to claim 1, wherein a bottom cover is provided at a position close to the bottom of the side of the post, a groove is formed at one side of the bottom cover, and the pedal, the return spring and the adjustment lever are all located in the groove.

4. Foldable tennis post according to claim 3, wherein said footplate has a distance between its top and the top of the groove, one end of said footplate extending outside said groove.