Adjustable Tension Rebound Net for Variable Training Force
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Solution Overview
Problem
Existing ball rebound devices lack adjustability in return tension, making them unsuitable for players of varying skill levels and are inefficient for training passes along the ground, with unpredictable rebounds when the ball hits the frame and difficulty in replacing the net.
Innovation Solution
A ball rebound device with a detachable sheet attached to a frame structure, featuring adjustable tension via movable frame elements and a simple assembly method, allowing for customizable rebound force and easy sheet replacement, enabling training without frame contact and adjustable angles for varied play scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the rebound device has a tight nonadjustable return tension level appropriate for skilled players, then the rebound force is increased for skilled players, but the device becomes too dangerous for use by children or beginners
Solution Approach 1:
The rebound device incorporates adjustable tension mechanisms that allow the rebound force to be dynamically changed according to the skill level of the player. The tension can be increased for skilled players to provide challenging rebounds, and decreased for beginners or children to ensure safety. This dynamic adjustability resolves the contradiction by making the same device suitable for different user groups.
Solution Approach 2:
The device allows changing the physical parameter of tension in the rebound net or spring elements. By adjusting the tension parameter, the rebound force can be optimized for different skill levels - high tension for skilled players seeking intense practice, and low tension for beginners needing gentler rebounds. This parameter adjustment capability eliminates the need for multiple devices.
2Object-affected harmful factors
If the rebound device has a loose nonadjustable return tension level appropriate for beginners, then the safety is improved for inexperienced players, but the device becomes unacceptable to skilled players
Solution Approach 1:
The adjustable tension mechanism enables the device to adapt its rebound characteristics to match the skill level of any player. Beginners can use the device with low tension settings for safe practice, while skilled players can increase the tension to achieve the intense, fast rebounds they need for advanced training. This dynamic adaptability makes a single device universally suitable.
Solution Approach 2:
The rebound device is designed to serve multiple functions and user groups through its adjustable tension system. It can function as a gentle training aid for children and beginners, and as a challenging practice tool for skilled players and professionals. This multi-functionality resolves the contradiction by making the device universally applicable across different skill levels.
3Reliability
If the ball hits the frame structure, then the rebound is significantly reduced and becomes unpredictable, but this reduces the applicability for training ground passes
Solution Approach 1:
The invention extracts the ball-contact function from the frame structure and concentrates it entirely on the rebound net or spring elements. The frame is designed to minimize ball contact, while the net/springs are positioned and tensioned to provide the primary rebound action. This extraction ensures predictable, controlled rebounds that are ideal for training ground passes, eliminating the unpredictability of frame contact.
Solution Approach 2:
Different parts of the device have specialized functions: the frame provides structural support with minimal ball contact, while the net or spring elements provide the controlled rebound surface. This local specialization ensures that balls interact primarily with the designed rebound surface rather than the frame, creating consistent and predictable rebound behavior for training purposes.
4Strength
If the sheet is permanently attached to the frame structure, then the structural integrity is maintained, but replacing the net becomes difficult
Solution Approach 1:
The rebound device is segmented into separate components: the frame structure and the rebound net/spring elements. The net is attached through detachable connections rather than permanent fixation, allowing it to be easily removed and replaced when worn or damaged, while the frame remains intact. This segmentation resolves the contradiction by enabling simple maintenance without compromising overall structural integrity.
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
The device provides a high-intensity training experience with adjustable rebound force, allowing for realistic game situations, including ground passes, and is lightweight, easy to assemble, and maintain, suitable for all skill levels and easy to transport.
Implementation Method 1
a sheet (5) being detachably attached to a front of the frame structure (2), wherein a tension of the sheet (5) is adjustable
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A ball rebound device (1) for ball games comprising: a frame structure (2), a sheet (5) being detachably attached to the front of the frame structure (2) and adjusting means (6) connected to the frame structure (2), the adjusting means (6) being able to move part of the frame structure (2), whereby the tension of the sheet (5) can increase or decrease. By stretching the sheet (5), it is possible to increase the rebound force of the sheet (5) by ball impact. Similarly, the rebound force can be decreased when the sheet (5) is slackened.