Tennis trainer with adjustable guide plate

Abstract

The utility model relates to a kind of tennis trainer with adjustable guide plate, including upper guide plate, lower guide plate and two connectors, fixed rod is installed on connector, and upper guide plate and lower guide plate all include the elastic support rod of U type and the guide net board fixed on elastic support rod, the both ends of the elastic support rod of lower guide plate are respectively fixed and inserted in two connectors, the both ends of the elastic support rod of upper guide plate are respectively installed in two connectors, angle position adjusting structure is equipped on the connector, and the angle position adjusting structure is suitable for the angle position adjustment of upper guide plate relative to lower guide plate. Angle adjustable design is adopted to upper guide plate, which brings convenience and diversity to teaching and practice.

Description

Technical Field

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

[0002] In tennis training, tennis training devices are used to assist in teaching and practice. To provide a reference surface during the swing and shot, tennis training devices are generally equipped with guide plates. The connectors of the guide plates are connected to the support. To better standardize the shot, tennis training devices use an upper and lower guide plate design, which are connected by a connector. The guide plates are usually mesh components with elastic support.

[0003] When hitting a topspin shot, the tennis ball spins and then propels itself forward. The angle between the ball's forward trajectory and the ground often varies. This is due not only to the player's adjustments based on the situation but also to their habits, and the style of hitting a topspin shot differs between different countries and regions. Typical tennis training equipment has an angle of approximately 70-75 degrees between the top guide plate and the ground. Therefore, during teaching and practice, the ball can only be hit in this direction, which undoubtedly limits the variety of hitting motions and cannot simulate the needs of different match scenarios.

[0004] In addition, the existing guide plate uses fiberglass rods for elastic support. Under wear and impact, the fiberglass rods will separate into glass fibers, posing a safety hazard. In severe cases, the fiberglass rods may even burst and crack, which not only affects the use but also harms the human body and pollutes the environment. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology by providing a tennis trainer with an adjustable upper guide plate angle, which brings convenience and versatility to teaching and practice.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A tennis training device with an adjustable guide plate includes a support frame, an upper guide plate, and a lower guide plate. Two fixed rods are mounted on the top of the support frame, and each fixed rod is fitted with a connector. Both the upper and lower guide plates include a U-shaped elastic support rod and a guide mesh plate fixed to the elastic support rod. The two ends of the elastic support rod of the lower guide plate are respectively fixedly inserted into the two connectors, and the two ends of the elastic support rod of the upper guide plate are respectively mounted on the two connectors. The device is characterized in that the connectors are provided with an angle adjustment structure, which is suitable for adjusting the angle position of the upper guide plate relative to the lower guide plate.

[0008] Preferably, the connector includes an upper insertion arm and a lower insertion arm, a fixing rod is mounted on the lower insertion arm, the two ends of the elastic support rod of the upper guide plate are respectively inserted into the upper insertion arms of the two connectors, the two ends of the elastic support rod of the lower guide plate are respectively inserted into the lower insertion arms of the two connectors, and the angle position adjustment structure includes a hinge seat provided at the upper end of the lower insertion arm of the connector, a hinge part provided on the upper insertion arm, and a position locking assembly. The hinge part of the upper insertion arm is hinged to the hinge seat of the lower insertion arm, thereby enabling the upper insertion arm to be angularly adjustable relative to the lower insertion arm around a pivot center axis. The position locking assembly is used for locking and unlocking the relative position between the upper insertion arm and the lower insertion arm.

[0009] Preferably, the hinge base includes a base, and two oppositely arranged seat plates are provided on the left and right sides of the base, forming a positioning gap between the seat plates. The seat plates are provided with through holes, and the hinge part is inserted into the positioning gap and can rotate within the positioning gap to complete the position change. The hinge part has a shaft hole corresponding to the position of the through hole. The position locking assembly includes a locking shaft and a locking nut. The locking shaft serves as the hinge shaft for hinged to the hinge base. The locking shaft passes through the through hole of the seat plate and the shaft hole of the hinge part. One end of the locking shaft is provided with a pressing end, and the other end of the locking shaft is threaded with a locking nut. The pressing end and the locking nut work together on the two seat plates to realize the clamping, locking and unlocking of the hinge part within the positioning gap.

[0010] Preferably, a limiting structure is provided between the hinge portion and the hinge seat to limit the rotation angle range of the hinge portion relative to the hinge seat. The limiting structure includes an angle limiting protrusion formed on the base, a limiting groove provided on the hinge portion, the limiting groove extending along the rotation direction of the hinge portion, the limiting groove having two limiting end faces, the angle limiting protrusion protruding into the limiting groove, and the angle limiting protrusion being stopped by the two limiting end faces to limit the position of the hinge portion relative to the hinge seat at the limit rotation angle.

[0011] Preferably, a limiting structure is provided between the hinge portion and the hinge seat to limit the range of rotation angle of the hinge portion relative to the hinge seat.

[0012] Preferably, the elastic support rod includes a metal elastic core rod, and a plastic layer is cured on the outer surface of the metal elastic core rod.

[0013] By adopting the above technical solution, the lower guide plate is fixed to the connector, the fixing rod on the connector is installed on the support bracket, the support bracket is placed on the ground, the angle of the lower guide plate relative to the ground remains unchanged, while the upper guide plate is installed on the connector through the angle position adjustment structure. The angle position adjustment structure is suitable for adjusting the angle position of the upper guide plate relative to the lower guide plate, so the angle position of the upper guide plate relative to the ground can be adjusted; thus, different directions of ball hitting can be achieved under the guidance of the upper guide plate, realizing the diversity of ball hitting actions and better simulating the needs of different game scenarios.

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

[0015] Figure 1 This is a schematic diagram of the structure of the tennis training device of this utility model;

[0016] Figure 2 This is an exploded view of the guide plate assembly of this utility model;

[0017] Figure 3 This is a bottom view of the connector of this utility model;

[0018] Figure 4 for Figure 3 A sectional view cut along section AA.

[0019] Figure 5 for Figure 3 A sectional view cut along BB.

[0020] Figure 6 This is a cross-sectional view of the elastic support rod of this utility model;

[0021] Figure 7 This is a schematic diagram of the upper insertion arm of this utility model;

[0022] Figure 8 This is a schematic diagram of the lower insertion arm of this utility model;

[0023] Figure 9 This is another embodiment of the connector of this utility model. Detailed Implementation

[0024] See appendix Figures 1-8This utility model discloses a tennis training device with an adjustable guide plate, including a support 5, an upper guide plate 1, and a lower guide plate 2. Two fixing rods 4 are installed on the top of the support 5, and each fixing rod 4 is fitted with a connector 3. The fixing rods 4 are mounted on the support support 5. Both the upper guide plate 1 and the lower guide plate 2 include U-shaped elastic support rods 11 and 21, and guide mesh plates 12 and 22 fixed to the elastic support rods 11 and 21. Addressing the safety risks associated with traditional fiberglass rod-type elastic support rods 11 and 21, a safer and more reliable design for elastic support rods 11 and 21 is adopted. Specifically, the elastic... Support rods 11 and 21 include a metal elastic core rod I, with a plastic layer II cured on its outer surface. This combination of a metal elastic core rod encased in plastic maintains good elasticity and prevents metal oxidation. Furthermore, the flexible plastic surface is safer for the human body during use. The elastic support rod 21 of the lower guide plate 2 is fixedly inserted into two connectors 3 at both ends, and the elastic support rod 11 of the upper guide plate 1 is also installed on two connectors 3 at both ends. Each connector 3 has an angle adjustment structure suitable for adjusting the angle of the upper guide plate 1 relative to the lower guide plate 2. Figure 1 As shown, the support bracket 5 of the tennis training device is placed on the ground, and the lower guide plate 2 is fixed on the support bracket 5. The angle of the lower guide plate 2 relative to the ground is fixed, while the angle of the upper guide plate 1 relative to the lower guide plate 2 is adjustable. Thus, the angle of the upper guide plate 1 relative to the ground is adjustable, bringing convenience and versatility to teaching and practice.

[0025] In this specific embodiment, the connector 3 includes an upper insertion arm 31 and a lower insertion arm 32. A fixing rod 4 is installed on the lower insertion arm 32. The two ends of the elastic support rod 11 of the upper guide plate 1 are respectively inserted into the upper insertion arms 31 of the two connectors 3. The two ends of the elastic support rod 21 of the lower guide plate 2 are respectively inserted into the lower insertion arms 32 of the two connectors 3. The angle position adjustment structure includes a hinge seat 321 provided at the upper end of the lower insertion arm 32 of the connector 3, a hinge part 311 provided on the upper insertion arm 31, and a position locking component. The hinge part 311 of the upper insertion arm 31 is hinged to the hinge seat 321 of the lower insertion arm 32, thereby enabling the upper insertion arm 31 to be angularly adjustable relative to the lower insertion arm 32 around a pivot center axis. The position locking component is used for locking and unlocking the relative position between the upper insertion arm 31 and the lower insertion arm 32. The connector employs a design with a lower insertion arm and an upper insertion arm that can rotate relative to each other, thereby enabling the angle adjustment of the upper guide plate. The installation of the upper guide plate is secure and reliable, and it has the advantages of simple and convenient adjustment operation. The lower insertion arm 32 of the connector 3 has an insertion hole, into which the elastic support rod 21 of the lower guide plate 2 is inserted. The elastic support rod of the lower guide plate 2 can be pulled out of the insertion hole to achieve the detachment of the lower guide plate 2. Similarly, the upper insertion arm 31 of the connector 3 also has an insertion hole, and the upper guide plate can also be detached from the upper insertion arm 31 of the connector 3. As another feasible embodiment of this utility model, other angle adjustment structure designs can be adopted. For example, the connector end can be designed with multiple insertion stations at different angle positions, and the elastic support rods of the upper guide plate can be inserted into different insertion stations to achieve angle position adjustment; or the connector can adopt an upper insertion arm and a lower insertion arm design, with the lower insertion arm having positioning structures at different angle positions (such as toothed discs arranged along the angle change direction), and the upper insertion arm having toothed surfaces that mate with the toothed discs. By adjusting different meshing tooth positions, the different angle positions between the upper and lower insertion arms can be adjusted and determined; of course, other existing angle adjustment structures can also be used. However, relying on the upper insertion arm and lower insertion arm design of the connector, the installation of the upper guide plate is reliable; and the upper and lower insertion arms are hinged, allowing the upper insertion arm to rotate relative to the lower insertion arm to adjust the angle position. The adjustment operation is simple and convenient, and the structure is simple and reliable.

[0026] Furthermore, the hinge seat 321 includes a base 3211, with two opposing seat plates 3212 on its left and right sides, forming a positioning gap 3213 between the seat plates 3212. Each seat plate 3212 has a through hole. The hinge part 311 is inserted into the positioning gap 3213 and can rotate within the positioning gap 3213 to complete position changes. The hinge part 311 has a shaft hole 3111 corresponding to the position of the through hole. The position locking assembly includes a locking shaft 3. 3 and locking nut 34, locking shaft 33 serves as the hinge shaft for hinged part 311 to hinge seat 321. Locking shaft 33 passes through the through hole of seat plate 3212 and shaft hole 3111 of hinge part 311. One end of locking shaft 33 is provided with a pressing end 331, and the other end of locking shaft 33 is threaded to locking nut 34. Pressing end 331 and locking nut 34 work together on the two seat plates 3212 to realize the clamping, locking and unlocking of hinge part 311 within positioning interval 3213. The locking operation involves tightening the locking shaft 33 and locking nut 34, which clamps and fixes the hinge 311 located within the positioning interval 3213 on the two seat plates 3212, thus establishing the angular position of the upper insert arm 31 relative to the lower insert arm 32. Conversely, loosening the locking shaft 33 and locking nut 34 allows the upper guide plate 1 to be moved, causing the upper insert arm 31 to rotate relative to the lower insert arm 32, adjusting the upper guide plate 1 to the desired angular position. Then, the locking shaft 33 and locking nut 34 are tightened. Figures 1-4 As shown, the operating handwheel can be set to the abutting end of the locking shaft; or it can be as follows: Figure 9 As shown, the operating handwheel is mounted on the lock nut. The overall structure is simple and compact. A handwheel is formed on the pressing end of the locking shaft to facilitate the locking and unlocking of the position locking component. With the above design, stepless adjustment of the angle position is simultaneously implemented, making it more flexible and convenient to use. Of course, as a feasible solution of this utility model, the position locking component can also be a stop-type structure, or adopt a top-pressing bolt design (a bolt is set on the hinge seat, and the head of the bolt can press against the hinge to achieve locking), etc.

[0027] To facilitate use, a limiting structure is provided between the hinge portion 311 and the hinge seat 321 to limit the rotation angle range of the hinge portion 311 relative to the hinge seat 321. In this specific embodiment, the limiting structure includes an angle limiting protrusion 3214 formed on the base 3211, and a limiting groove 3112 provided on the hinge portion 311. The limiting groove 3112 extends along the rotation direction of the hinge portion 311 and has two limiting end faces III. The angle limiting protrusion 3214 protrudes into the limiting groove 3112, and the angle limiting protrusion 3214 is stopped by the two limiting end faces III to limit the extreme rotation angle position of the hinge portion 311 relative to the hinge seat 321. It has the advantages of simple and compact structure.

Claims

1. A tennis training device with an adjustable guide plate, comprising a support, an upper guide plate, and a lower guide plate. Two fixing rods are mounted on the top of the support, and each fixing rod is fitted with a connector. Both the upper and lower guide plates include a U-shaped elastic support rod and a guide mesh plate fixed to the elastic support rod. The two ends of the elastic support rod of the lower guide plate are respectively fixedly inserted into the two connectors, and the two ends of the elastic support rod of the upper guide plate are respectively mounted on the two connectors. The device is characterized in that: The connector is provided with an angle position adjustment structure, which is suitable for adjusting the angle position of the upper guide plate relative to the lower guide plate.

2. The tennis training device with an adjustable guide plate according to claim 1, characterized in that: The connector includes an upper insertion arm and a lower insertion arm. A fixing rod is mounted on the lower insertion arm. The two ends of the elastic support rod of the upper guide plate are respectively inserted into the upper insertion arms of the two connectors, and the two ends of the elastic support rod of the lower guide plate are respectively inserted into the lower insertion arms of the two connectors. The angle position adjustment structure includes a hinge seat at the upper end of the lower insertion arm of the connector, a hinge part on the upper insertion arm, and a position locking assembly. The hinge part of the upper insertion arm is hinged to the hinge seat of the lower insertion arm, thereby enabling the upper insertion arm to be angularly adjustable relative to the lower insertion arm around a pivot center axis. The position locking assembly is used for locking and unlocking the relative position between the upper insertion arm and the lower insertion arm.

3. The tennis trainer with an adjustable guide plate according to claim 2, characterized in that: The hinge base includes a base with two opposing seat plates on the left and right sides of the base. A positioning gap is formed between the seat plates, and the hinge can rotate within the positioning gap to complete the position change. The seat plates are provided with through holes, and the hinge part is inserted into the positioning gap. The hinge part has a shaft hole corresponding to the position of the through hole. The position locking assembly includes a locking shaft and a locking nut. The locking shaft serves as the hinge shaft for hinged to the hinge base. The locking shaft passes through the through hole of the seat plate and the shaft hole of the hinge part. One end of the locking shaft is provided with a pressing end, and the other end of the locking shaft is threaded with a locking nut. The pressing end and the locking nut work together on the two seat plates to clamp and lock the hinge part within the positioning gap and unlock it.

4. The tennis trainer with an adjustable guide plate according to claim 3, characterized in that: A limiting structure is provided between the hinge part and the hinge seat to limit the rotation angle range of the hinge part relative to the hinge seat. The limiting structure includes an angle limiting protrusion formed on the base and a limiting groove provided on the hinge part. The limiting groove extends along the rotation direction of the hinge part and has two limiting end faces. The angle limiting protrusion is inserted into the limiting groove. The angle limiting protrusion is stopped by the two limiting end faces to limit the position of the limit rotation angle of the hinge part relative to the hinge seat.

5. The tennis trainer with an adjustable guide plate according to claim 2, characterized in that: A limiting structure is provided between the hinge part and the hinge seat to limit the range of rotation angle of the hinge part relative to the hinge seat.

6. The tennis trainer with an adjustable guide plate according to claim 1, characterized in that: The elastic support rod includes a metal elastic core rod, and a plastic layer is cured on the outer surface of the metal elastic core rod.

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