Tennis Training Device Pivotable Profile Bar
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Solution Overview
Problem
Existing tennis training devices are limited in their ability to practice a wide range of shots, particularly failing to effectively simulate forehand and backhand shots.
Innovation Solution
A tennis training device featuring a support rod articulated on a base, with a pivotable profile bar and a counterweight system that allows for deflection and braking, enabling simulation of various shots while incorporating adjustable components and sensors for data recording.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid support rod is used to support the ball, then the device structure is simple and stable, but the device cannot simulate the deflection and braking of real tennis shots
Solution Approach 1:
The support rod is replaced with a pivotable profile bar that can deflect and rotate dynamically during ball impact. The profile bar is articulated at multiple points (support rod connection, carrier bar connection) allowing it to simulate the natural deflection and braking motions of a real tennis racket during forehand and backhand shots.
Solution Approach 2:
The rigid support rod is segmented into multiple articulated components: the support rod itself, the profile bar, and the carrier bar. This segmentation allows each component to move independently, creating a multi-degree-of-freedom system that can simulate complex shot trajectories while maintaining structural stability through the articulated connections.
2Adaptability or versatility
If the device is designed to practice only slice and topspin shots, then the device structure is simple, but the device cannot practice forehand and backhand shots
Solution Approach 1:
The profile bar is designed with pivotable mounting that can be adjusted along the support rod, and the carrier bar can be pivoted between two plates. This universal mounting system allows the device to accommodate and simulate multiple shot types including forehand, backhand, slice, and topspin shots, making the device multi-functional rather than limited to specific shot types.
Solution Approach 2:
The dynamic articulation of the profile bar on the carrier bar, and the carrier bar on the support rod, creates a flexible system that can adapt its motion trajectory to simulate different shot types. The pivotable joints allow the device to transition between different shot simulations without requiring separate dedicated mechanisms for each shot type.
3Reliability
If the second stop is fixed to counteract the force, then the device structure is simple, but the device cannot allow deflection of the support rod in the direction of impact
Solution Approach 1:
The second stop is made pivotable rather than fixed, allowing it to move dynamically during ball impact. The pivotable stop can deflect along with the profile bar during the impact phase, then return to its counteracting position to provide braking force. This dynamic behavior enables both deflection simulation and force counteraction without requiring separate mechanisms.
Solution Approach 2:
The pivotable second stop is supported by a counterweight mechanism that provides the necessary force to counteract the impact direction after the ball is struck. The counterweight system allows the stop to pivot freely during impact while maintaining the ability to return to and exert the counteracting force needed for realistic shot simulation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the practice of all types of shots, including forehand and backhand, with precise simulation and data recording for improved training, enhancing the versatility and effectiveness of tennis practice.
Implementation Method 1
the second stop in the direction of impact being counteracted a force is pivotably supported, for example against a spring force
Implementation Method 2
the second stop in the direction of impact being counteracted a force is pivotably supported, for example against a spring force
Implementation Method 3
a ball bearing 2, on which the two half-shells 1a, 1b are supported rotatably
Implementation Method 4
magnets arranged at a distance from one another allowing the bearing block to swing between the magnets
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a tennis training device comprising a supporting bar (5) that is hinged to a base (B, 6), can be pivoted between a first stop (8) and a second stop (9), and pivotably supports a profiled rod (3) which projects from the support bar (5) and at the free end of which a ball (1) is rotatably mounted; the second stop (9) in the hitting direction is supported so as to be pivotable against a force.