Trampoline Hook Recess for Cord Joint Wear Reduction
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Solution Overview
Problem
Existing trampolines with elastic cord rings have a visually unattractive joint that is the weakest point and prone to premature wear due to uneven stretching loads, leading to reduced service life and potential damage from rubbing against the frame.
Innovation Solution
The receiver of the trampoline hook incorporates a recess to center and secure the joint, ensuring uniform stretching of the cord segments and hiding the joint from view, thereby reducing wear and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cord ring is joined using clamps to form a joint, then the cord ring can be assembled, but the joint becomes visually unattractive and the weakest point in the loop
Solution Approach 1:
The joint is extracted from the visible cord segments and relocated to the receiver by engaging the joint with the receiver's recess. This hides the joint inside the receiver structure, making it invisible from the outside while maintaining the cord ring's functional integrity.
Solution Approach 2:
The joint is nested within the receiver structure by engaging with the recess. The joint becomes contained within the receiver's internal geometry, specifically utilizing the thinner wall section as a retention feature, which protects and secures the joint while hiding it from view.
2Ease of manufacture
If the joint is located in one of the cord segments between the frame and hook, then the cord ring can be assembled, but this segment is subjected to greater stretching loads and wears out more quickly
Solution Approach 1:
The joint is extracted from the cord segments and relocated to the receiver. By engaging the joint with the receiver's recess, the joint is removed from the stretching path of the cord segments, preventing the unequal load distribution that causes premature wear.
Solution Approach 2:
The receiver acts as an intermediary structure that receives and secures the joint. The recess in the receiver provides a dedicated engagement space with a thinner wall section that retains the joint, isolating it from the stretching loads experienced by the cord segments during trampoline operation.
3Device complexity
If the joint is exposed in the cord segment, then the cord ring structure is simple, but the joint is visible and can rub against the frame causing damage
Solution Approach 1:
The joint is extracted from the exposed cord segment and relocated inside the receiver structure. The recess in the receiver provides a protective enclosure that prevents the joint from contacting the frame, eliminating the rubbing and scratching damage while maintaining structural simplicity.
4Stability of the object's composition
If the cord ring joint is not centered, then the cord ring can slip during use, but centering the joint requires additional structural features
Solution Approach 1:
The receiver structure incorporates a localized feature (the recess with thinner wall section) specifically designed to engage and center the joint. This local modification provides centering functionality without requiring complex overall receiver redesign, maintaining simplicity while achieving stable joint positioning.
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 recessed joint design extends the service life of the trampoline by evenly distributing stretching loads, improving appearance, and preventing damage to the cord and frame.
Implementation Method 1
When the cord ring is looped over the frame and received in the respective hook, there are four segments of the cord between the frame and the hook, each of which stretches when in use.
Data Source
AI summary
The disclosure relates to a trampoline that has a circumferential frame and a bounce mat, which has numerous hooks. The hooks each have at least one receiver that is bordered on one side by a side wall. A cord ring with a joint is placed in each receiver in order to attach the bounce mat to the circumferential frame. The side wall has a first recess in which the joint engages. The joint is retained in the hook by the recess such that the cord ring does not slip while the trampoline is being used.