CN116370934A

CN116370934A - Tennis training device

Info

Publication number: CN116370934A
Application number: CN202310495353.2A
Authority: CN
Inventors: 彭峻
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-05-04
Filing date: 2023-05-04
Publication date: 2023-07-04

Abstract

The application relates to tennis training device, include: a support frame assembly; the ball receiving assembly is arranged adjacent to the ball sending side of the supporting frame assembly; the ball inlet of the ball passing assembly is connected with the ball collecting assembly; the elastic ball feeding assembly is connected with the ball outlet of the ball passing assembly, and the elastic ball feeding assembly can eject tennis balls to one side far away from the supporting frame assembly. According to the technical scheme, the problem that not only is manpower wasted but also experience of practitioners is affected when tennis training in the prior art is effectively solved.

Description

Tennis training device

Technical Field

The application relates to the technical field of tennis training devices, in particular to a tennis training device.

Background

Tennis is popular with more and more people as a sports with strong fitness and competitive properties.

In daily training, a large number of tennis balls are needed, after training, the tennis balls are scattered in all corners of a training field, and the tennis ball picking work is needed to be completed by special staff, so that the staff can collect the tennis balls with time and labor. In addition, after tennis is collected together, training personnel are required to throw the tennis, so that a great deal of manpower is wasted, and the experience of the training personnel can be influenced.

Disclosure of Invention

The application provides a tennis trainer for when solving the tennis training among the prior art, not only extravagant manpower still influences the problem of practicing personnel's experience.

To solve the above problems, the present application provides a tennis training device, including: a support frame assembly; the ball receiving assembly is arranged adjacent to the ball sending side of the supporting frame assembly; the ball inlet of the ball passing assembly is connected with the ball collecting assembly; the elastic ball feeding assembly is connected with the ball outlet of the ball passing assembly, and the elastic ball feeding assembly can eject tennis balls to one side far away from the supporting frame assembly.

Further, the elastic ball feeding assembly comprises a ball feeding shell, a rotary ball throwing arm, a rotary frame and a first driving part, the rotary frame is arranged in the ball feeding shell, the middle part of the rotary ball throwing arm is rotatably connected with the rotary frame, the ball throwing end of the rotary ball throwing arm is located at one side of the rotary frame, which is far away from the supporting frame assembly, the first driving part is matched with the force application end of the rotary ball throwing arm, and the force application end is located at one side of the rotary frame, which is far away from the ball throwing end.

Further, the first driving part comprises an electromagnetic coil, a ferromagnetic body and an elastic piece, wherein the ferromagnetic body is fixed at the force application end, the electromagnetic coil is fixed on the ball feeding shell, the first end of the elastic piece is connected at the force application end between the ferromagnetic body and the rotating frame, and the second end of the elastic piece is connected with the ball feeding shell.

Further, the first driving part further comprises a spring force adjuster, the spring force adjuster comprises an adjuster shell, a rotating shaft and a pressing block, the adjuster shell is connected with the ball feeding shell, the pressing block is fixedly connected with the rotating shaft, the rotating shaft is rotatably fixed on the adjuster shell, the pressing block abuts against the second end of the elastic piece, and the distances from the circumferential outer wall of the pressing block to the rotating shaft are different.

Further, the ball throwing end is provided with a groove.

Further, the elastic ball feeding assembly further comprises a ball storage box and a ball falling pipe, the upper end of the ball falling pipe is communicated with the ball storage box, and the lower end of the ball falling pipe is communicated with the ball feeding shell.

Further, the inner diameter of the drop tube is larger than the outer diameter of the tennis ball and smaller than twice the outer diameter of the tennis ball.

Further, the elastic ball feeding assembly further comprises a first limiting part, the first limiting part is fixed on the inner wall of the ball feeding shell, the rotary ball throwing arm is in a ball throwing state and a ball throwing state to be thrown, when the rotary ball throwing arm is in the ball throwing state, the distance between the lower end of the first limiting part and the rotary ball throwing arm is smaller than the outer diameter of the tennis ball, and when the rotary ball throwing arm is in the ball throwing state, the distance between the lower end of the first limiting part and the rotary ball throwing arm is larger than the outer diameter of the tennis ball.

Further, the rotary ball throwing arm is provided with a ball falling point, the ball falling point is positioned between the ball throwing end and the rotating shaft of the rotary ball throwing arm, and the lower end of the first limiting part is positioned between the ball falling point and the ball throwing end

Further, the elastic ball feeding assembly further comprises a second limiting part, the second limiting part is located on the rotary ball throwing arm, when the rotary ball throwing arm is in a ball throwing state, the second limiting part is located at an avoiding position avoiding the lower end of the ball falling pipe, and when the rotary ball throwing arm is in a ball to be thrown state, the second limiting part is located at a limiting position of the lower end of the ball falling pipe.

Further, the second limiting part is a limiting arm, the first end of the limiting arm is connected with the rotary ball throwing arm, and the second end of the limiting arm extends to the lower end far away from the ball dropping pipe.

Further, the elastic ball feeding assembly further comprises a second driving part and a mounting seat, the second driving part is fixed on the mounting part, the ball feeding shell is rotatably mounted on the mounting seat, and the second driving part can drive the mounting seat to rotate.

Further, the second driving part comprises a rotating motor and a first gear, the elastic ball feeding assembly further comprises a second gear, the second gear is rotatably arranged on the mounting seat, the ball feeding shell is fixed on the second gear, the output end of the rotating motor is connected with the first gear, and the first gear is meshed with the second gear.

Further, pass ball subassembly includes transmission casing, action wheel, annular transmission belt, from driving wheel and a plurality of baffle all are located transmission casing, action wheel and from the both ends that the driving wheel is located annular transmission belt respectively, a plurality of baffle set up the outer wall at annular transmission belt with interval, transmission casing's bottom has into the ball mouth, transmission casing's upper portion has out the ball mouth, transmission casing's into the ball mouth and receive ball subassembly and link to each other, transmission casing's out the ball mouth and elasticity give ball subassembly and link to each other.

Further, two ball inlets are respectively positioned on the wall surfaces of the transmission shells at two sides of the annular transmission belt, and the two ball inlets are arranged in a staggered mode.

Further, the ball collecting assembly is fixed on the supporting frame assembly.

Further, the tennis training device further comprises a control component, wherein the control component is arranged on the supporting frame component.

Compared with the prior art, the technical scheme provided by the application has the following advantages:

according to the technical scheme, the supporting frame assembly plays a supporting role on the ball collecting assembly, after a training person hits a tennis ball to the ball collecting assembly, the ball collecting assembly receives the tennis ball and then enters the ball passing assembly, and the ball passing assembly passes the tennis ball to the elastic ball feeding assembly to feed the tennis ball. Therefore, the ball picking and throwing of the staff can be reduced, the ball picking and throwing workload of the staff is greatly reduced, and the experience of the training staff is improved. According to the technical scheme, the problem that not only is manpower wasted but also experience of practitioners is affected when tennis training in the prior art is effectively solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic diagram showing the overall structure of a tennis training device according to a first embodiment of the present application;

FIG. 2 shows a schematic top view of the tennis training device of FIG. 1;

FIG. 3 shows a schematic cross-sectional view of A-A of a ball receiving assembly of the tennis training device of FIG. 2;

FIG. 4 shows a schematic diagram of the ball passing assembly of the tennis training device of FIG. 1;

FIG. 5 shows an A-direction schematic view of the pass assembly of FIG. 4;

FIG. 6 shows a schematic view of the resilient ball-feeding assembly of the tennis training device of FIG. 1;

FIG. 7 shows an enlarged partial schematic view of the elastomeric ball feed assembly of FIG. 6;

FIG. 8 shows a schematic view of a partial construction of a support frame assembly of the tennis training device of FIG. 1;

fig. 9 is a schematic structural diagram of a tennis training device according to a second embodiment of the present application;

fig. 10 shows a schematic of the mating structure of the support frame assembly and the ball receiving assembly of the tennis training device of fig. 9.

Wherein the above figures include the following reference numerals:

10. a support frame assembly; 20. a ball receiving assembly; 21. a high-speed camera; 22. a projector; 30. a pass assembly; 31. a transmission housing; 32. a driving wheel; 33. an endless conveyor belt; 34. driven wheel; 35. a ball baffle plate; 40. an elastic ball feeding assembly; 41. a ball feeding shell; 42. rotating the ball throwing arm; 43. a rotating frame; 44. an electromagnetic coil; 45. a ferromagnetic body; 46. an elastic member; 47. a spring force regulator; 48. a first limit part; 49. a second limit part; 50. a second driving section; 60. a mounting base; 70. a control assembly; 100. training personnel; 200. tennis racket; 300. tennis ball; 14.1 parts of wire drawing, 14.2 parts of wire coiling wheel, 14.3 parts of long shaft, 14.4 parts of driven gear, 14.5 parts of transmission gear and 14.6 parts of ball collecting groove folding motor; 14.7, a goal hard board; 13. the device comprises a side net rotating shaft, 14, inclined bevel gears A and 15, inclined bevel gears B and 16, a top net rotating shaft, 17, a tubular motor, 18, an external power line, 19, a motor shaft and a shaft sleeve, 50.1, a side net frame, 50.2, a side net frame long groove, 50.3, a top net front beam, 50.4, a top net front beam long groove, 50.5 and a sliding pin.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

As shown in fig. 1 to 8, a tennis training device according to a first embodiment includes: support frame assembly 10, ball receiving assembly 20, pass assembly 30, and elastic ball feeding assembly 40. The ball receiving assembly 20 is disposed adjacent to the ball delivery side of the support frame assembly 10. The ball inlet of the pass assembly 30 is connected to the ball receiving assembly 20. The elastic ball feed assembly 40 is connected to the ball outlet of the pass assembly 30, and the elastic ball feed assembly 40 ejects the tennis ball to a side away from the support frame assembly 10.

According to the technical scheme of the embodiment, the supporting frame assembly 10 plays a role in supporting the ball collecting assembly 20, after a training person hits the tennis ball 300 to the ball collecting assembly 20, the tennis ball collecting assembly 20 receives the tennis ball and then enters the ball passing assembly 30, and the ball passing assembly 30 passes the tennis ball 300 to the elastic ball feeding assembly 40 to feed the tennis ball. Therefore, the ball picking and throwing of the staff can be reduced, the ball picking and throwing workload of the staff is greatly reduced, and the experience of the training staff is improved. The technical scheme of the embodiment effectively solves the problems that not only is manpower wasted but also experience of practitioners is affected when tennis training in the prior art is performed.

It should be noted that the ball collecting assembly 20 includes a ball blocking curtain, ball blocking nets on both sides, and a lower folding ball collecting groove. The training personnel hit the tennis 300 to the ball blocking curtain, the ball blocking net on two sides can prevent the tennis 300 from being ejected out, the tennis 300 falls into the folding ball receiving groove, the folding ball receiving groove is obliquely arranged, and the tennis 300 rolls into the ball passing assembly 30 under the action of gravity. The folding ball receiving groove comprises a plurality of inclined plates, and the inclined plates can be folded or unfolded.

As shown in fig. 6 and 7, in the technical solution of this embodiment, the elastic ball feeding assembly 40 includes a ball feeding housing 41, a rotary ball throwing arm 42, a rotary frame 43 and a first driving part, the rotary frame 43 is installed in the ball feeding housing 41, the middle part of the rotary ball throwing arm 42 is rotatably connected with the rotary frame 43, the ball throwing end of the rotary ball throwing arm 42 is located at one side of the rotary frame 43 away from the supporting frame assembly 10, the first driving part is matched with the force applying end of the rotary ball throwing arm 42, and the force applying end is located at one side of the rotary frame 43 away from the ball throwing end. The setting of elasticity for ball subassembly 40 can save artifical throwing ball, can play the effect of protection internal part for ball casing 41, rotates the setting of throwing ball arm 42, rotating turret 43 and first drive portion and makes throwing ball effect better, and the simulation is more lifelike. The above description of the position refers to the mating portion of the rotating frame 43 and the rotating ball-throwing arm 42, and the rotating frame 43 may be a support or a rotating shaft.

As shown in fig. 6 and 7, in the technical solution of the present embodiment, the first driving portion includes an electromagnetic coil 44, a ferromagnetic body 45 and an elastic member 46, the ferromagnetic body 45 is fixed at a force application end, the electromagnetic coil 44 is fixed on the ball feeding housing 41, a first end of the elastic member 46 is connected at the force application end between the ferromagnetic body 45 and the rotating frame 43, and a second end of the elastic member 46 is connected with the ball feeding housing 41. When the electromagnetic coil 44 is electrified, the electromagnetic coil 44 attracts the ferromagnetic body 45, when the electromagnetic coil 44 is deenergized, no attraction force exists between the electromagnetic coil 44 and the ferromagnetic body 45, at the moment, the elastic piece 46 applies elastic force to the rotary ball throwing arm 42, the tennis ball 300 positioned at the ball throwing end is suddenly thrown out, and a training person can hit the tennis ball 300 for training. The elastic member 46 is a spring, and the spring is in a compressed state. The second end of the elastic member 46 is connected to the ball-feeding housing 41 either directly or indirectly. The elastic ball feeding assembly 40 is located in the middle of the supporting frame assembly 10 in the left-right direction, and the ball-blocking curtain is provided with ball throwing holes. As other practical embodiments, the elastic ball feeding assembly 40 may be disposed on the side of the ball receiving assembly 20 near the practicer 100, and the practicer 100 can hit the tennis ball 300 by holding the tennis racket 200, so that the ball throwing holes on the ball screen may not be disposed.

As shown in fig. 6 and 7, in the technical solution of the present embodiment, the first driving portion further includes a spring force adjuster 47, the spring force adjuster 47 includes an adjuster housing, a rotating shaft, and a pressing block, the adjuster housing is connected to the ball feeding housing 41, the pressing block is fixedly connected to the rotating shaft, the rotating shaft is rotatably fixed to the adjuster housing, the pressing block abuts against the second end of the elastic member 46, and distances from the circumferential outer wall of the pressing block to the rotating shaft are different. The arrangement of the spring force regulator 47 can effectively change the speed, height and force of ball throwing. The circumferential outer wall of the pressing block is a wall surface that abuts against the elastic member 46, and the engagement position between the pressing block and the elastic member 46 changes as the rotation shaft rotates.

As shown in fig. 6 and 7, in the technical solution of this embodiment, the ball-throwing end has a groove. Tennis ball 300 will automatically slide into the groove, and the setting of the groove easily positions tennis ball 300.

As shown in fig. 6 and 7, in the technical solution of the present embodiment, the elastic ball feeding assembly 40 further includes a ball storage box and a ball drop tube, the upper end of the ball drop tube is communicated with the ball storage box, and the lower end of the ball drop tube is communicated with the ball feeding housing 41. The ball storage box can accommodate a plurality of tennis balls 300 at the same time, and the ball dropping pipe can enable the tennis balls 300 to slide into the ball feeding housing 41 from the ball storage box.

As shown in fig. 6, in the technical solution of this embodiment, the inner diameter of the drop tube is larger than the outer diameter of the tennis ball and smaller than twice the outer diameter of the tennis ball. Such that only one tennis ball 300 can be slid down at a time.

As shown in fig. 6, in the technical solution of the present embodiment, the elastic ball feeding assembly 40 further includes a first limiting portion 48, the first limiting portion 48 is fixed on the inner wall of the ball feeding housing 41, the rotating ball throwing arm 42 has a ball throwing state and a ball to be thrown state, when the rotating ball throwing arm 42 is in the ball throwing state, the distance between the lower end of the first limiting portion 48 and the rotating ball throwing arm 42 is smaller than the outer diameter of the tennis ball, and when the rotating ball throwing arm 42 is in the ball to be thrown state, the distance between the lower end of the first limiting portion 48 and the rotating ball throwing arm 42 is larger than the outer diameter of the tennis ball. The arrangement of the first limiting part 48 ensures that only one tennis ball 300 is arranged in the groove, and according to the matching relationship between the first limiting part 48 and the rotary ball throwing arm 42, after one tennis ball 300 is thrown out, the other tennis ball 300 can slide into the groove.

As shown in fig. 6, in the technical solution of the present embodiment, the rotary ball-throwing arm 42 has a ball drop point located between the ball-throwing end and the rotation axis of the rotary ball-throwing arm 42, and the lower end of the first limiting part 48 is located between the ball drop point and the ball-throwing end. The structure is ingenious in arrangement, and the tennis balls 300 are better output into the grooves one by one.

As shown in fig. 6, in the technical solution of the present embodiment, the elastic ball feeding assembly 40 further includes a second limiting portion 49, where the second limiting portion 49 is located on the rotating ball throwing arm 42, and when the rotating ball throwing arm 42 is in the ball throwing state, the second limiting portion 49 is located at a avoiding position that avoids the lower end of the ball dropping pipe, and when the rotating ball throwing arm 42 is in the ball to be thrown state, the second limiting portion 49 is located at a limiting position of the lower end of the ball dropping pipe. The second limiting portion 49 is arranged to enable the tennis balls 300 to slide into the ball feeding housing 41 one by one from the ball falling pipe, so that the clamping phenomenon between the tennis balls 300 is avoided.

As shown in fig. 6, in the technical solution of the present embodiment, the second limiting portion 49 is a limiting arm, a first end of the limiting arm is connected to the rotating ball throwing arm 42, and a second end of the limiting arm extends away from the lower end of the ball dropping pipe. The limiting arm has the advantages of simple structure, lower processing cost and convenient use.

As shown in fig. 6 and 7, in the technical solution of the present embodiment, the elastic ball feeding assembly 40 further includes a second driving portion 50 and a mounting seat 60, the second driving portion 50 is fixed on the mounting portion, the ball feeding housing 41 is rotatably mounted on the mounting seat 60, and the second driving portion 50 can drive the mounting seat 60 to rotate. The ball throwing scope of the structure is enlarged, namely, the elastic ball throwing assembly 40 throws tennis balls obliquely forwards in addition to throwing the tennis balls 300 directly forwards, so that the universality of the tennis training device is enlarged.

As shown in fig. 6 and 7, in the technical solution of the present embodiment, the second driving part 50 includes a rotating motor and a first gear, the elastic ball feeding assembly 40 further includes a second gear rotatably mounted on the mounting base 60, the ball feeding housing 41 is fixed on the second gear, the output end of the rotating motor is connected to the first gear, and the first gear is meshed with the second gear. The structure is compact, and the transmission precision is high.

As shown in fig. 4 and 5, in the technical solution of this embodiment, the ball passing assembly 30 includes a transmission housing 31, a driving wheel 32, an annular transmission belt 33, a driven wheel 34 and a plurality of ball blocking plates 35, where the driving wheel 32, the annular transmission belt 33, the driven wheel 34 and the plurality of ball blocking plates 35 are all located in the transmission housing 31, the driving wheel 32 and the driven wheel 34 are located at two ends of the annular transmission belt 33 respectively, the plurality of ball blocking plates 35 are arranged on the outer wall of the annular transmission belt 33 at intervals, a ball inlet is formed at the bottom of the transmission housing 31, a ball outlet is formed at the upper part of the transmission housing 31, the ball inlet of the transmission housing 31 is connected with the ball collecting assembly 20, and the ball outlet of the transmission housing 31 is connected with the elastic ball feeding assembly 40. The function of automatically transmitting tennis balls 300 is realized by the aid of the ball transmission assembly 30, and the degree of automation of the tennis training device is improved. The tennis ball 300 can be continuously transmitted by the aid of the transmission shell 31, the driving wheel 32, the annular transmission belt 33, the driven wheel 34 and the plurality of ball baffle plates 35, and continuity of tennis ball transmission is guaranteed.

As shown in fig. 4, in the technical solution of this embodiment, there are two ball inlets, and the two ball inlets are respectively located on the wall surfaces of the transmission housing 31 at two sides of the annular transmission belt 33, and the two ball inlets are staggered. Thus, two tennis balls 300 can enter the transmission housing 31 at the same time, and the above structure improves the efficiency of the transmission of the tennis balls 300.

As shown in fig. 1, in the technical solution of the present embodiment, a ball collecting assembly 20 is fixed on a supporting frame assembly 10. The structure is stable and the integrated effect is good.

As shown in fig. 1, in the technical solution of the present embodiment, the tennis training device further includes a control component 70, where the control component 70 is disposed on the support frame assembly 10. The control component 70 is further provided to increase the degree of intelligence, and the control component 70 may be a cloud server, a mobile phone, and/or a computer.

As shown in fig. 2 and 3, the supporting frame assembly 10 further includes 13, a side net rotating shaft, 14, bevel gears a,15, bevel gears B,16, a top net rotating shaft, 17, a tubular motor, 18, an external power line, 19, a motor shaft and a shaft sleeve. 14.1 of wiredrawing, 14.2 of wire coiling wheel, 14.3 of long shaft, 14.4 of driven gear, 14.5 of transmission gear, 14.6 of folding motor of ball collecting groove and 14.7 of hard plate of goal.

From the above, it can be seen that: the intelligent tennis basic training device comprises a main frame body, a batting curtain, a folding ball collecting groove, a ball lifting system, a ball throwing system (an elastic ball feeding component 40), a special tennis racket with an inductor, a telescopic blocking net (cloth), a high-speed camera, a projector, an electric cabinet, an operation button box, a cloud server and the like.

The main frame body (supporting frame assembly 10) is composed of an aluminum alloy profile frame and a closing plate. The width dimension and the thickness dimension of the material are respectively as follows: 3000 x 300mm. The front of the main frame body is provided with a shooting ball screen, a folding ball collecting groove and a telescopic blocking net (cloth); the middle part of the lower part of the frame body is provided with a ball lifting system and a ball throwing system; the front rod of the top telescopic barrier net is provided with a high-speed camera and a projector, and the electric control and operation system is arranged on the side edge in the main frame body. Can be arranged on various places with hard ground outdoors or indoors, and is suitable for tennis practitioners from beginner to advanced stage.

The tennis training device is integrally delivered from a factory, is arranged or hung on the ground in a flat manner when being found on site, and can be put into use after being connected with a power supply. During training, the power switch is turned on firstly, the mobile phone scans codes and logs in, the tennis training device is turned on by one key, the front telescopic blocking net (blocking nets on two sides of the ball collecting assembly) automatically stretches out, and the ball lifting system, the ball throwing system, the high-speed camera 21, the projector 22 and the like are automatically put into operation. The ball serving exercise can be performed first by taking out the ball and a certain number of tennis balls (e.g., 20, no ball is required for the initial exercise, and the ball is pre-stored in the exercise device) at the receiving box of the ball (tennis ball 300) and the ball (tennis racket 200). When the ball is played, the ball lifting system and the ball throwing system can be closed firstly, the played ball falls into the lower folding ball receiving groove on the ball striking screen, and the played ball is concentrated and stored in the front part of the ball inlet of the ball lifting system, and tennis in the ball receiving groove can be picked up and placed in the tennis basket after the basketball is played, and the ball is played continuously after the basketball returns.

When the ball is shot, the ball lifting system and the ball throwing system are sequentially opened, the ball throwing force and the ball throwing angle are selected (or the ball is shot on the left side or the right side), and tennis balls in the ball receiving groove can enter the ball throwing system through the ball lifting system and are thrown to a designated position according to the set direction and force, so that a practitioners can practice the ball throwing. The hit tennis ball falls into the ball receiving groove after being hit on the ball hitting curtain, and the ball hitting exercise is performed in a circulating and reciprocating mode.

In the practice of serving and batting, the high-speed camera of the device can record the limb actions, batting moment, initial flight track of the ball and the like during each serving/batting, identify the flight track and drop point of the batting tennis on a standard tennis court through a built-in specific algorithm, automatically compare the built-in evaluation standard of the device and give a clear score to a practitioner. And projecting the evaluation result on the batting screen.

When the training is stopped, the ball throwing system is turned off, the ball lifting system is enabled to continue to run for a certain time, after all tennis balls in the ball receiving groove enter the ball storage box of the ball throwing system through the ball lifting system, the ball lifting system is turned off, the telescopic blocking net is retracted and reset, and the whole power supply is turned off. The practitioners can settle accounts on the mobile phones and check the statistical results of the training.

As shown in fig. 10, the second embodiment is different from the first embodiment in that the tennis training device has no control unit 70. Thus, different tennis training devices can be selected according to the personal conditions.

As shown in fig. 9, the detail structure of the ball receiving assembly 20 is: the side net frame 50.1, the side net frame long groove 50.2, the top net front beam 50.3, the top net front beam long groove 50.4 and the sliding pin 50.5 are used for retracting or expanding the side net frame 50.1 through sliding of the sliding pin 50.5.

The tennis training device is provided with a telescopic blocking net (cloth) at the top and at two sides of a main frame body, a high-speed camera is arranged on a cross rod at the upper edge of the main frame body, a projector is not arranged, and an LED electronic display screen is arranged at the upper part of a batting curtain and used for immediately displaying the evaluation result of each batting, a lamp tube or a lamp belt is also arranged in the main frame body, and the lamp tube or the lamp belt and the batting curtain form a lamp box capable of clearly displaying, so that the position of a drop point of the tennis ball on the batting curtain can be clearly seen during exercise at night conveniently. The embodiment is suitable for being installed on a side net and an end net in the existing standard tennis court, and is hung by adopting a special hanging bracket, so that the occupied space is very small when not being practiced, and the training on playing and the court is not influenced.

The method of use and the training procedure are the same as in the first embodiment, except that the simulation and evaluation results are not projected on the batting screen during the exercise, but the evaluation results are displayed on the LED display screen.

The technical scheme of the third embodiment is different from that of the first embodiment in that on the basis of the first embodiment, a high-speed camera and a projector are not installed, an LED display screen is not installed, evaluation and simulation software is not configured, the batting curtain is divided into different scoring areas through scribing and color distinction instead, tennis balls hit in a certain batting area to indicate that the tennis balls fall into the corresponding scoring areas on a standard tennis court, and the quality of each batting is roughly judged through human eyes observation. The main frame body is also internally provided with a lamp tube or a lamp belt, and the lamp tube or the lamp belt and the batting curtain form a lamp box capable of clearly displaying, so that the tennis ball can be clearly seen at the position of the drop point on the batting curtain when practising in the period of poor light. The embodiment is suitable for schools and other places in relatively backward places (such as remote mountain areas), and has low cost, less maintenance and simplicity. In order to prevent outdoor tennis balls from flying out and being difficult to pick up, the top surface of the main frame body and the telescopic nets (cloth) on two sides are reserved. The main frame body adopts a floor mounting mode, and four floor feet are fixed on foundation embedded iron through bolts or expansion bolts are fixed on the leveled hardened ground.

The method of use and training procedure are also substantially the same as in example one, but do not identify and simulate each shot or strike, nor do the computer software evaluations. A simple determination is made by observing the ball falling position on the ball striking screen only by the human eye.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the 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 tennis training device, comprising:

a support frame assembly (10);

the ball receiving assembly (20), the ball receiving assembly (20) is arranged adjacent to the ball serving side of the supporting frame assembly (10);

the ball conveying assembly (30), the ball inlet of the ball conveying assembly (30) is connected with the ball receiving assembly (20);

the elastic ball feeding assembly (40), the elastic ball feeding assembly (40) is connected with the ball outlet of the ball passing assembly (30), and the elastic ball feeding assembly (40) can be used for ejecting tennis balls to one side far away from the supporting frame assembly (10).

2. Tennis training device according to claim 1, wherein the elastic ball feeding assembly (40) comprises a ball feeding housing (41), a rotary ball-throwing arm (42), a rotary frame (43) and a first driving part, wherein the rotary frame (43) is arranged in the ball feeding housing (41), the middle part of the rotary ball-throwing arm (42) is rotatably connected with the rotary frame (43), the ball-throwing end of the rotary ball-throwing arm (42) is positioned on the side of the rotary frame (43) facing away from the supporting frame assembly (10), and the first driving part is matched with the force-applying end of the rotary ball-throwing arm (42), and the force-applying end is positioned on the side of the rotary frame (43) facing away from the ball-throwing end.

3. Tennis training device according to claim 2, wherein said first driving part comprises an electromagnetic coil (44), a ferromagnetic body (45) and an elastic member (46), said ferromagnetic body (45) being fixed at said force application end, said electromagnetic coil (44) being fixed on said ball feeding housing (41), said elastic member (46) having a first end connected at said force application end between said ferromagnetic body (45) and said turret (43), said elastic member (46) having a second end connected with said ball feeding housing (41).

4. A tennis training device according to claim 3 wherein said first drive portion further comprises a spring force adjuster (47), said spring force adjuster (47) comprising an adjuster housing, a spindle and a pressing block, said adjuster housing being connected to said ball feed housing (41), said pressing block being fixedly connected to said spindle, said spindle being rotatably fixed to said adjuster housing, said pressing block being in abutment with said second end of said spring member (46), the circumferential outer walls of said pressing blocks being at different distances from said spindle.

5. Tennis training device according to claim 2, wherein the ball throwing end has a recess.

6. Tennis training device according to claim 2, wherein the elastic ball feeding assembly (40) further comprises a ball storage box and a ball drop tube, the upper end of the ball drop tube being in communication with the ball storage box, the lower end of the ball drop tube being in communication with the ball feeding housing (41).

7. The tennis training device according to claim 6, wherein said drop tube has an inner diameter greater than the outer diameter of the tennis ball and less than twice the outer diameter of the tennis ball.

8. The tennis training device according to claim 6, wherein the elastic ball feeding assembly (40) further comprises a first limiting portion (48), the first limiting portion (48) is fixed on the inner wall of the ball feeding housing (41), the rotating ball throwing arm (42) has a ball throwing state and a ball to be thrown state, when the rotating ball throwing arm (42) is in the ball throwing state, a distance between a lower end of the first limiting portion (48) and the rotating ball throwing arm (42) is smaller than an outer diameter of a tennis ball, and when the rotating ball throwing arm (42) is in the ball to be thrown state, a distance between a lower end of the first limiting portion (48) and the rotating ball throwing arm (42) is larger than the outer diameter of the tennis ball.

9. Tennis training device according to claim 8, wherein the rotating ball-throwing arm (42) has a ball-drop point located between the ball-throwing end and the rotational axis of the rotating ball-throwing arm (42), the lower end of the first limit part (48) being located between the ball-drop point and the ball-throwing end.

10. Tennis training device according to claim 8, wherein the elastic ball feeding assembly (40) further comprises a second limit part (49), the second limit part (49) is located on the rotating ball throwing arm (42), when the rotating ball throwing arm (42) is in the ball throwing state, the second limit part (49) is located at a avoiding position avoiding the lower end of the ball dropping pipe, and when the rotating ball throwing arm (42) is in the ball to be thrown state, the second limit part (49) is located at a limit position of the lower end of the ball dropping pipe.

11. Tennis training device according to claim 10, wherein the second stop (49) is a stop arm, the first end of which is connected to the rotating ball-throwing arm (42), the second end of which extends away from the lower end of the drop tube.

12. Tennis training device according to claim 2, wherein the elastic ball feeding assembly (40) further comprises a second driving part (50) and a mounting seat (60), the second driving part (50) being fixed to the mounting part, the ball feeding housing (41) being rotatably mounted on the mounting seat (60), the second driving part (50) being capable of driving the mounting seat (60) to rotate.

13. Tennis training device according to claim 12, wherein said second drive part (50) comprises a rotary motor and a first gear, said elastic ball feeding assembly (40) further comprises a second gear rotatably mounted on said mounting (60), said ball feeding housing (41) being fixed on said second gear, an output of said rotary motor being connected to said first gear, said first gear being in mesh with said second gear.

14. Tennis training device according to any of claims 1 to 13, wherein the ball transfer assembly (30) comprises a transmission housing (31), a driving wheel (32), an annular transmission belt (33), a driven wheel (34) and a plurality of ball baffle plates (35), wherein the driving wheel (32), the annular transmission belt (33), the driven wheel (34) and the plurality of ball baffle plates (35) are all located in the transmission housing (31), the driving wheel (32) and the driven wheel (34) are respectively located at two ends of the annular transmission belt (33), the plurality of ball baffle plates (35) are arranged on the outer wall of the annular transmission belt (33) at intervals, the bottom of the transmission housing (31) is provided with ball inlets, the upper part of the transmission housing (31) is provided with ball outlets, the ball inlets of the transmission housing (31) are connected with the ball collecting assembly (20), and the ball outlets of the transmission housing (31) are connected with the elastic ball feeding assembly (40).

15. Tennis training device according to claim 14, wherein there are two ball inlets, which are respectively located on the wall surfaces of the transmission housing (31) on both sides of the endless transmission belt (33), and the two ball inlets are staggered.

16. Tennis training device according to any of claims 1 to 13, wherein the ball receiving assembly (20) is fixed to the support frame assembly (10).

17. Tennis training device according to any of claims 1 to 13, further comprising a control assembly (70), said control assembly (70) being arranged on said support frame assembly (10).