Trampoline Cable Hook Structure for Longer Elastic Spring Travel
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Solution Overview
Problem
Mini trampolines face a challenge in balancing the minimum external frame diameter, maximum rebound mat diameter, and optimal spring travel length of elastic elements, while also ensuring user safety and maintenance-friendliness, as existing solutions compromise on these factors.
Innovation Solution
A cable hook design featuring a housing with four receivers, two elastic elements with clamping elements, and a flexible strap element, where the cable hook has a closed body with central receiving cavities and terminating pieces that form a visual and tactile warning, allowing for increased spring travel without reducing the exercise area and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring travel length of elastic elements is increased to improve damping and oscillation, then the oscillation quality improves, but the external diameter of the frame must be increased
Solution Approach 1:
The cable hook body is designed as a three-dimensional structure with receiving cavities that extend in multiple directions. The elastic elements are arranged diagonally within the housing, utilizing the vertical and lateral dimensions rather than only horizontal space. This allows the spring travel to occur in a three-dimensional path, achieving longer effective spring travel without increasing the horizontal frame diameter.
Solution Approach 2:
The elastic elements are nested within the cable hook housing structure. The receiving cavities are positioned to accommodate the elastic elements in a compact arrangement, with the elastic elements fitted inside the housing rather than extending externally. This nesting approach maximizes the use of internal volume, allowing longer spring travel within a compact external footprint.
2Device complexity
If conventional fixing methods are used, then the structure is simple, but the service life of elastic elements is reduced due to insufficient oscillation tolerance
Solution Approach 1:
The fixing system is segmented into distinct functional components: the cable hook housing, receiving cavities, elastic elements with clamping elements, and terminating pieces. This segmentation allows each component to be optimized for its specific function - the housing provides structural support, the receiving cavities guide the elastic elements, and the clamping elements secure the flexible strap. This modular segmentation enables better stress distribution and oscillation tolerance, extending service life.
3Duration of action of stationary object
If the cable hook design is made more complex to improve durability and oscillation tolerance, then the service life increases, but the ease of manufacture decreases
Solution Approach 1:
The cable hook housing integrates multiple functions into a single component: it provides structural support, contains the receiving cavities, guides the elastic elements, and houses the terminating pieces. This merging of functions into one molded housing simplifies manufacturing compared to assembling multiple separate parts, while still achieving the durability and oscillation tolerance required for extended service life.
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 new design achieves 50 to 600% more oscillation cycles, providing better durability and safety by clearly marking the exercise area and reducing the risk of injury, while maintaining a compact shape that allows for easy maintenance and increased user safety.
Implementation Method 1
two elastic elements with clamping elements at the free ends
Implementation Method 2
the length of the spring travel of the elastic elements
Implementation Method 3
clamping elements at the free ends... each has a clamping element enlarging the periphery of the elastic element
Data Source
AI summary
A cable hook for fixing a rebound mat to a trampoline frame by means of two elastic elements and at least one flexible strap element has a housing with four receivers, wherein each elastic element has two free ends, each of which has a clamping element enlarging the periphery of the elastic element. A clamping element is inserted in each receiver. The cable hook has a cable hook body which is closed in the peripheral direction transversely to the fixing direction, wherein in each case two receivers are separated centrally by a receiving cavity in the cable hook body through which a clamping element can be passed. The cable hook has two terminating pieces which can each be inserted in a respective receiving cavity, and each has a cover rounding pointing away from the cable hook housing and oriented towards each other.