Portable tennis training device

Abstract

The utility model relates to a portable tennis training device which comprises a supporting frame and a ball hitting state monitoring device, a swing reset mechanism and a guide plate assembly are installed on the top of the supporting frame, the swing reset mechanism comprises a rotary swing arm, a supporting arm is fixed to a rotary swing installation base of the rotary swing arm, and the rotary swing installation base can rotate on the top of the supporting frame. The elastic reset piece provides reset force for resetting the rotary swing arm to the initial position, a simulated tennis ball is sleeved on a horizontal ball shaft at the swing end of the supporting arm, the ball hitting state monitoring device comprises a rotating speed sensor used for detecting the rotating speed of the simulated tennis ball and a controller installed on the supporting frame, and the rotating speed sensor is installed on the horizontal ball shaft. The supporting arm is provided with a hollow pipe cavity, the rotary swing installation base is provided with a containing cavity with a wire outlet, the hollow pipe cavity leads to the containing cavity, and a communication wire connected to the rotating speed sensor is arranged along the hollow pipe cavity and the containing cavity, penetrates out of the containing cavity through the wire outlet and then is connected to the controller. And the rotating speed of the hit upper rotating ball can be accurately and reliably known.

Description

Technical Field

[0001] This utility model relates to sports equipment, specifically a portable tennis trainer for assisting tennis training. Background Technology

[0002] Mastering topspin is a crucial fundamental skill in tennis learning and training. To improve learning and practice efficiency, tennis training machines are often used as auxiliary equipment. A tennis training machine has a swing arm mounted on its stand, which can swing relative to the support frame. At the top of the swing arm is a horizontally positioned tennis axis, on which a simulated tennis ball with a hole in the center can rotate. When the player hits the simulated tennis ball with a racket, the simulated tennis ball experiences friction and spins on the tennis axis, while simultaneously experiencing forward momentum upon impact, which drives the swing arm. A high-quality topspin shot often possesses both strong spin and forward momentum, and in different situations, the player needs to adjust the ratio between spin and momentum to produce a better topspin effect.

[0003] With the existing tennis training equipment, trainees can only visually observe the ball to roughly determine its spin speed and thus assess the quality of their topspin shot. However, in dynamic situations, it is difficult to accurately judge the ball's motion, and the results of multiple shots cannot be easily compared. Furthermore, it is not easy for instructors and trainees to effectively communicate the results, thus affecting the quality of training. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technology and provide a portable tennis training device that can effectively measure the spin speed of a hit topspin ball.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A portable tennis trainer includes a support frame, a swing reset mechanism and a guide plate assembly mounted on the top of the support frame. The swing reset mechanism includes a rotating swing arm and an elastic reset member. The bottom of the rotating swing arm has a swing mounting seat, on which a support arm is fixed. The rotating swing arm is rotatably mounted on the top of the support frame via the swing mounting seat. The rotating swing arm has an initial position. The elastic reset member provides a reset force to reset the rotating swing arm to the initial position. The swing end of the support arm has a horizontal ball shaft, on which a self-rotating simulated tennis ball is mounted. The trainer is characterized by further including a hitting state monitoring device. The hitting state monitoring device includes a speed sensor for detecting the rotational speed of the simulated tennis ball and a controller for processing the speed signal from the speed sensor. The speed sensor is mounted on the horizontal ball shaft, and the controller is mounted on the support frame. The support arm has a hollow cavity, and the swing mounting seat has a receiving cavity. The hollow cavity leads to the receiving cavity, which has an outlet. A communication line connected to the speed sensor is arranged along the hollow cavity and the receiving cavity, passes through the outlet, exits the receiving cavity, and connects to the controller.

[0007] Preferably, the ball-hitting state monitoring device further includes an angle sensor for detecting the swing amplitude of the rotating arm. The angle sensor is placed inside the accommodating cavity, and the communication line connected to the angle sensor passes through the outlet of the accommodating cavity and is connected to the controller, which processes the angle signal from the angle sensor.

[0008] Preferably, the controller is mounted on the top of the support frame, and the controller is located on the side of the rotation direction of the cable outlet when the rotating arm is in the initial position, and there is a buffer gap between the terminal of the controller and the cable outlet when the rotating arm is in the initial position.

[0009] Preferably, the support frame includes a tripod, an adjusting tube, and a top bracket. The tripod includes a tubular main support rod and two diagonal braces connected to the main support rod. The main support rod has a hollow cavity. The adjusting tube is inserted into the hollow cavity and can slide along the hollow cavity to adjust the length of the adjusting tube extending out of the hollow cavity. The top bracket is installed on the top of the adjusting tube and has two spaced mounting ears. A swivel mounting seat is placed between the two mounting ears and is rotatably mounted on the mounting ears. A controller mounting plate is fixed to the top of the adjusting tube, and the controller is mounted on the controller mounting plate.

[0010] Preferably, the top end of the regulating tube has an insertion port, and an installation block is fixedly inserted into the insertion port. The installation block has an insertion hole. The controller mounting plate includes a main seat plate and an insertion tongue plate. The controller is fixed on the main seat plate, and the insertion tongue plate is inserted into the insertion hole of the mounting block.

[0011] Preferably, the guide plate assembly includes a pair of guide plates arranged at an angle, and a guide plate mounting frame for mounting the guide plates. The guide plate includes a guide plate body with a mounting side extending from it. A mounting rod is provided on each side of the guide plate body in the width direction. The guide plate mounting frame includes two mounting arms arranged left and right at the top, and a support rod fixed to a support frame. The mounting arms are mounted on the support rods. The two mounting rods of the two guide plates are correspondingly mounted on the upper and lower ends of the mounting arms, thereby forming a clearance window between the two guide plates to avoid the swing end of the rotating arm. The guide plate body includes a guide plate sheet made of elastic plastic sheet and a plate mounting seat located on the mounting side. The edge of the guide plate sheet corresponding to the mounting side is fixed to the plate mounting seat. The mounting rod is fixedly connected to the plate mounting seat. The guide plate sheet is provided with several ventilation holes.

[0012] Preferably, the guide plate is transparent.

[0013] By adopting the above technical solution, the rotation speed sensor acquires the spin speed of a simulated tennis ball after it has been hit, which is then processed by the controller (e.g., displaying the rotation speed, or / and obtaining a shot quality evaluation based on a comparison of rotation speed values). This allows the trainee to intuitively understand the shot's trajectory. Furthermore, the support arm is designed with a hollow cavity and a swing arm mounting base, ensuring that the transmission line between the rotation speed sensor and the controller is internally routed. This not only protects the transmission line but also allows the tennis trainer to conveniently and reliably detect the spin speed of a simulated tennis ball after a hit. An angle sensor provides another shot data point, acquiring the swing amplitude of the rotating arm after the shot, thus providing a more comprehensive reference for the trainee's shot quality. The housing also houses the angle sensor and its internal wiring. Simultaneously, the placement of the cable outlet and the controller ensures that the transmission line is pushed back when the rotating arm begins to swing from its initial position during a shot, preventing damage to the transmission line. The guide plate body is made of a thin, elastic plastic sheet, eliminating the need for a support elastic tension rod. The guide plate is also transparent, offering aesthetic appeal, weather resistance, durability, clear visibility, and enhanced safety. The transparent plastic guide plate can be perforated with several through holes as needed; different arrangements of holes can achieve both aesthetic appeal and reduced wind pressure. The shape design of the plate mounting base not only provides a more secure and reliable fixation to the guide plate, but the longitudinal side supports also make the installation of the mounting rod more convenient and secure.

[0014] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a perspective view of the portable tennis trainer of this utility model from the rear side.

[0016] Figure 2 This is a perspective view of the portable tennis trainer of this utility model from the front side.

[0017] Figure 3 This is a schematic diagram of the cooperative structure of the swing reset mechanism and the ball hitting status monitoring device of this utility model;

[0018] Figure 4 This is an exploded view of the mounting portion of the controller in this utility model;

[0019] Figure 5 This is an exploded view of the guide plate of this utility model. Detailed Implementation

[0020] See appendix Figures 1-5 This utility model discloses a portable tennis training device, including a support frame 1. A swing reset mechanism 2 and a guide plate assembly 3 are mounted on the top of the support frame 1. The swing reset mechanism 2 includes a rotating swing arm 21 and an elastic reset component (not shown in the figure; the elastic reset component can be a torsion spring, tension spring, compression spring, or rubber band, etc.). The bottom of the rotating swing arm 21 has a swing mounting base 211, and a support arm 212 is fixed on the swing mounting base 211. The rotating swing arm 21 is rotatably mounted on the top of the support frame 1 via the swing mounting base 211. The rotating swing arm 21 has an initial position (e.g., ...). Figure 1 and Figure 2As shown), the elastic reset member provides the reset force for the rotating swing arm 21 to return to its initial position. The swing end of the support arm 212 has a horizontal ball shaft 2121, on which a self-rotating simulated tennis ball 4 is mounted. It also includes a ball-hitting state monitoring device, which includes a speed sensor 51 for detecting the rotational speed of the simulated tennis ball 4, and a controller 52 for processing the speed signal from the speed sensor 51. The controller 52 can process the speed signal from the speed sensor 51 by sending the speed signal (e.g., outputting it via Bluetooth or wireless signals) to a corresponding terminal, such as a mobile phone or display. In other words, the controller is a device with a built-in transceiver. The rotational speed signal is compared with a preset rotational speed (the controller has a built-in comparison circuit), thereby providing a corresponding evaluation result according to preset evaluation rules. In other words, the controller also has a comparison circuit. The rotational speed sensor 51 is mounted on the horizontal ball shaft 2121, and the controller 52 is mounted on the support frame 1. The support arm 212 has a hollow tube 2120, and the pendulum mounting base 211 has a receiving cavity 2111. The hollow tube 2120 leads to the receiving cavity 2111, and the receiving cavity 2111 has an outlet 21110. The communication line 50 connected to the rotational speed sensor 51 is arranged along the hollow tube 2120 and the receiving cavity 2111, passes through the outlet 21110, exits the receiving cavity 2111, and then connects to the controller 52. With the above configuration, the tennis trainer can be equipped with a rotational speed sensor. The rotational speed sensor acquires the spin speed of the simulated tennis ball after it is hit, and then the controller processes this information (such as sending a signal, and / or obtaining shot quality evaluation information based on a rotational speed comparison value), allowing the trainee to intuitively obtain the shot's condition. In this specific embodiment, the speed sensor is a magnetic induction type. The speed sensor 51 is installed inside the horizontal ball shaft 2121 and fixed with resin. The magnetic element 51-1 that cooperates with the speed sensor 51 is fixed on the simulated tennis ball 4 and rotates with the simulated tennis ball 4. The speed sensor 51 receives a magnetic induction signal every time it rotates once.

[0021] To further facilitate objective judgment of the quality of the shot by the practitioner, the shot status monitoring device also includes an angle sensor 53 for detecting the swing amplitude of the rotating arm 21. The angle sensor 53 is placed inside the accommodating cavity 2111. The communication cable 50 connected to the angle sensor 53 passes through the outlet 21110 and exits the accommodating cavity 2111 before connecting to the controller 52. The controller 52 processes the angle signal from the angle sensor 53. The rotating shaft of the angle sensor is fixed on the support frame. The base of the angle sensor and the rotating arm rotate synchronously. When the rotating arm rotates, it drives the angle sensor to generate an angle signal. The controller 52 processes the signal from the angle sensor 53 by sending the angle signal (such as Bluetooth or wireless signal output) to transmit the rotation speed to the corresponding terminal, such as a mobile phone or display. That is, the controller is a device with a built-in signal transceiver. Alternatively, it can compare the angle signal with a preset angle value (the controller has a built-in comparison circuit) to give a corresponding evaluation result according to the preset evaluation rules. That is, the controller also has a comparison circuit. In this utility model, the functions of the speed sensor, angle sensor and controller are set as conventional settings in the electronic field. The speed sensor, angle sensor and controller are conventional devices in the electronic field, so the specific structure of the above electronic devices themselves will not be described in detail.

[0022] Because the rotating arm 21 swings, and the communication line 50 connects two relatively moving parts, for communication protection, please refer to the appendix. Figure 2 and 3 The controller 52 is mounted on the top of the support frame 1. The controller 52 is located on the side where the cable outlet 21110 rotates in the same direction as the rotating arm 21 when it is in its initial position, and there is a buffer gap between the terminal of the controller 52 and the cable outlet 21110 when the rotating arm 21 is in its initial position. With this configuration, when the user hits a simulated tennis ball and the rotating arm swings backward from its initial position, the cable outlet moves towards the controller, and the communication cable is pushed down, thus preventing it from being pulled and protecting the communication cable.

[0023] In this specific embodiment, the support frame 1 includes a tripod 11, an adjusting tube 12, and a top bracket 13. The tripod 11 includes a tubular main support rod 111 and two diagonal braces 112 connected to the main support rod 111. The two diagonal braces 112 and the main support rod 111 can be connected in a traditional detachable plug-in manner, or they can be hinged and folded for storage. The main support rod 111 has a hollow cavity, and the adjusting tube 12 is inserted into the hollow cavity and can slide along the hollow cavity to adjust the extension of the adjusting tube. The length of the empty tube is shown in the figure. The adjusting tube adopts a design with multiple positioning holes. Positioning pins are inserted into the positioning holes to fix the main support rod 111 and the adjusting tube 12. The top bracket 13 is installed on the top of the adjusting tube 12. The top bracket 13 has two spaced-apart mounting ears 131. The swivel mounting seat 211 is placed between the two mounting ears 131 and rotatably mounted on the mounting ears 131. A controller mounting plate 14 is fixed to the top of the adjusting tube 12, and the controller 52 is mounted on the controller mounting plate 14. The communication line passes through the gap between the two mounting ears, thus protecting the communication line.

[0024] To ensure convenient and reliable mounting of the controller, the cavity of the regulating tube is typically through-hole. Therefore, the top of the regulating tube 12 has an insertion port 121. A mounting block 15 is fixedly inserted into the insertion port 121. The mounting block 15 has an insertion hole 151. The controller mounting plate 14 includes a main base plate and an insertion tongue plate 142. The controller 52 is fixed to the main base plate, and the insertion tongue plate 142 is inserted into the insertion hole 151 of the mounting block 15. This design not only facilitates and securely mounts the controller but also allows for the sealing of the top port of the regulating tube, eliminating the need for a separate sealing procedure.

[0025] In one embodiment of this utility model, the guide plate assembly 3 includes a pair of guide plates 31 arranged at an angle, and a guide plate mounting bracket 32 ​​for mounting the guide plates 31. The guide plate 31 includes a guide plate body 311, which has a mounting side with mounting rods 312 extending from it. A mounting rod 312 is provided on each side of the guide plate body 311 in the width direction. The guide plate mounting bracket 32 ​​includes two mounting arms 321 located at the top and arranged laterally, and a support rod 322 fixed to the support frame 1. The mounting arms 321 are mounted on the support rod 322, and the two mounting rods 312 of the two guide plates 31 correspond one-to-one. Mounted on the upper and lower ends of the mounting arm 321, thus forming a clearance window 6 between the two guide plates 31 to avoid the swing end of the rotating arm 21. The guide plate body 311 includes a guide plate 3111 made of an elastic plastic sheet and a plate mounting seat 3112 located on the mounting side. The specific material of the elastic plastic sheet can be selected by those skilled in the art as needed, such as PC, PETG, PVC, etc. The edge of the guide plate 3111 corresponding to the mounting side is fixed on the plate mounting seat 3112, and the mounting rod 312 is fixedly connected to the plate mounting seat 3112. The guide plate 3111 is provided with several ventilation holes 31111. The plate mounting seat 3112 has a positioning slot 31120. After the guide plate 3111 is inserted into the positioning slot 31120, it is fixed on the plate mounting seat 3112. This achieves a firm and reliable fixation of the guide plate. The fixing method for the guide plate is selected according to the material. For example, it can be fixed by ultrasonic welding, resin glue, or fasteners.

[0026] Furthermore, the plate mounting base 3112 is U-shaped, including a transverse side base 31121 and two longitudinal side bases 31122 located at the two ends of the transverse side base 31121. The longitudinal side bases 31122 are provided with longitudinal insertion holes, into which the mounting rod 312 is inserted. This not only ensures reliable fixing of the guide plate, making the guide plate more robust and reliable, but also facilitates the installation of the mounting rod via the longitudinal side bases of the plate mounting base. The mounting rod can be made of metal.

[0027] The guide plate 3111 is made transparent. The elastic plastic sheet is designed to be transparent to avoid obstructing the view and to ensure unobstructed vision.

[0028] This portable tennis trainer simulates the motion of a tennis ball after it has been hit, capturing data such as the ball's spin speed as an evaluation of spin intensity. An angle sensor detects the swing amplitude of the rotating arm, simulating the angle of the ball's movement to evaluate its forward momentum. This allows trainees to more intuitively understand and assess the quality of their shots.

Claims

1. A portable tennis trainer, comprising a support frame, a swing reset mechanism and a guide plate assembly mounted on the top of the support frame, the swing reset mechanism comprising a rotating swing arm and an elastic reset member, the bottom of the rotating swing arm having a swing mounting seat, a support arm fixed on the swing mounting seat, the rotating swing arm being rotatably mounted on the top of the support frame via the swing mounting seat, the rotating swing arm having an initial position, the elastic reset member providing a reset force to reset the rotating swing arm to the initial position, the swing end of the support arm having a horizontal ball shaft, and a self-rotating simulated tennis ball mounted on the horizontal ball shaft, characterized in that: It also includes a ball-hitting status monitoring device, which includes a speed sensor for detecting the rotational speed of a simulated tennis ball, and a controller for processing the speed signal from the speed sensor. The speed sensor is mounted on a horizontal ball axis, and the controller is mounted on a support frame. The support arm has a hollow cavity, and the pendulum mounting base has a receiving cavity. The hollow cavity leads to the receiving cavity, and the receiving cavity has a wire outlet. The communication line connected to the speed sensor is arranged along the hollow cavity and the receiving cavity, passes through the wire outlet, exits the receiving cavity, and is connected to the controller.

2. The portable tennis trainer according to claim 1, characterized in that: The ball-hitting state monitoring device also includes an angle sensor for detecting the swing amplitude of the rotating arm. The angle sensor is placed inside the accommodating cavity, and the communication line connected to the angle sensor passes through the outlet of the accommodating cavity and is connected to the controller. The controller processes the angle signal from the angle sensor.

3. The portable tennis trainer according to claim 1 or 2, characterized in that: The controller is installed on the top of the support frame. The controller is located on the side of the rotation direction of the cable outlet when the rotating arm is in the initial position, and there is a buffer gap between the controller's terminal and the cable outlet when the rotating arm is in the initial position.

4. The portable tennis trainer according to claim 1 or 2, characterized in that: The support frame includes a tripod, an adjusting tube, and a top bracket. The tripod includes a tubular main support rod and two diagonal braces connected to the main support rod. The main support rod has a hollow cavity. The adjusting tube is inserted into the hollow cavity and can slide along the hollow cavity to adjust the length of the adjusting tube extending out of the hollow cavity. The top bracket is installed on the top of the adjusting tube and has two spaced mounting ears. A swivel mounting seat is placed between the two mounting ears and is rotatably mounted on the mounting ears. A controller mounting plate is fixed to the top of the adjusting tube, and the controller is mounted on the controller mounting plate.

5. The portable tennis trainer according to claim 4, characterized in that: The top of the regulating tube has an insertion port, and an installation block is fixedly inserted into the insertion port. The installation block has an insertion hole. The controller mounting plate includes a main base plate and an insertion tongue plate. The controller is fixed on the main base plate, and the insertion tongue plate is inserted into the insertion hole of the mounting block.

6. The portable tennis trainer according to claim 1, characterized in that: The guide plate assembly includes a pair of guide plates arranged at an angle and a guide plate mounting frame for mounting the guide plates. Each guide plate includes a guide plate body with a mounting side extending from it. A mounting rod is provided on each side of the guide plate body in the width direction. The guide plate mounting frame includes two mounting arms located at the top and arranged to the left and right, and a support rod fixed to a support frame. The mounting arms are mounted on the support rods. The two mounting rods of the two guide plates are correspondingly mounted on the upper and lower ends of the mounting arms, thereby forming a clearance window between the two guide plates to avoid the swing end of the rotating arm. The guide plate body includes a guide plate sheet made of elastic plastic sheet and a plate mounting seat located on the mounting side. The edge of the guide plate sheet corresponding to the mounting side is fixed to the plate mounting seat. The mounting rod is fixedly connected to the plate mounting seat. The guide plate sheet has several ventilation holes.

7. The portable tennis trainer according to claim 6, characterized in that: The guide plate is transparent.

8. The portable tennis trainer according to claim 6, characterized in that: The plate mounting base has a positioning slot. After the guide plate is inserted into the positioning slot, it is fixed on the plate mounting base. The plate mounting base is U-shaped and includes a transverse side seat and two longitudinal side seats located at the two ends of the transverse side seat. A longitudinal insertion hole is provided on the longitudinal side seat, and the mounting rod is inserted into the longitudinal insertion hole.

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