Forearm Crutch Holding Device with Elastic Clamping Plates
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Solution Overview
Problem
Conventional forearm crutches fail to stably hold the forearm due to deformation of holding plates and lack of adequate elasticity, leading to slippage and discomfort, and require inconvenient strap adjustments.
Innovation Solution
A forearm crutch design featuring two holding plates with elastic elements and pivots that provide a stable clamping force, adjustable length, and anti-slip features to securely hold the forearm, with metal coil springs for durability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional holding plates are used, then the structure is simple, but the forearm cannot be stably held and slips out
Solution Approach 1:
The holding plates are designed to be movable relative to the supporting rod through pivot connections, allowing dynamic adjustment of the holding plates' positions and angles. This dynamic structure enables the holding plates to adapt to different forearm sizes and positions, improving stability while maintaining reasonable structural complexity
Solution Approach 2:
The elastic elements change the physical state of the holding plates from rigid to flexible, enabling them to deform and apply variable clamping forces. This parameter change allows the holding plates to maintain stable contact with the forearm while accommodating variations in user anatomy
2Strength
If plastic cap is used for supporting rod, then manufacturing is easy, but supporting elasticity is not satisfactory
Solution Approach 1:
The supporting rod combines rigid materials (metal or rigid plastic) with elastic elements (spring components) to create a composite structure. This composite design provides both the structural strength needed for manufacturing and the elastic properties required for comfortable supporting, resolving the contradiction between ease of manufacture and supporting elasticity
3Reliability
If strap coupling is required, then forearm can be restrained, but user coupling is inconvenient
Solution Approach 1:
The elastic elements automatically apply clamping force to the holding plates without requiring user intervention to couple straps. The system serves itself by using the elastic deformation of the spring elements to maintain continuous contact and restraint of the forearm, eliminating the need for manual strap coupling while maintaining reliable forearm restraint
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 design ensures a stable, comfortable, and convenient holding of the forearm with improved durability, preventing slippage and allowing for easy length adjustment, enhancing user safety and comfort.
Implementation Method 1
Each of the two elastic elements is coupled between one of the two holding plates and the coupling portion to provide the two clamping plates with a holding force relative to the holding portion for holding a forearm of a user
Data Source
AI summary
A forearm crutch includes a supporting rod, a handle, and a holding device. The supporting rod is adapted to contact with ground. The supporting rod includes an upper end having a holding portion. The handle is mounted below the holding portion and extending forward. The holding device includes two holding plates and two elastic elements. The two holding plates are respectively mounted to two sides of the holding portion. Each of the two elastic elements is coupled between one of the two holding plates and the coupling portion to provide the two clamping plates with a holding force relative to the holding portion for holding a forearm of a user.