Center Pull Cable Handle Hollow Tube Design
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Solution Overview
Problem
Existing cable handles for exercise devices are heavy due to solid steel construction, generate metal-on-metal contact noise, and restrict movement due to fixed attachment points, limiting optimal grip control and freedom of movement during exercises.
Innovation Solution
A center pull cable handle design featuring a hollow cylindrical steel tube with a rubberized grip and flexible aircraft cable, where the cable is secured within the tube and surrounded by soft tubing, providing a lightweight, noise-free, and flexible attachment system that centers resistance in the palm for improved grip control and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solid steel construction is used for cable handles, then strength and durability are improved, but weight increases significantly
Solution Approach 1:
The handle is divided into multiple components: a hollow cylindrical body, a separate cable assembly, and attachment points. This segmentation allows each part to be optimized independently - the hollow body reduces weight while the cable provides the necessary strength, resolving the contradiction between strength and weight.
Solution Approach 2:
The patent uses a hollow cylindrical body instead of solid steel, and incorporates flexible cable elements within the handle structure. This flexible shell approach maintains structural integrity and strength while significantly reducing the overall weight of the handle assembly.
2Stability of the object's composition
If fixed attachment points are used in cable handles, then structural stability is improved, but freedom of movement during exercise is restricted
Solution Approach 1:
The patent incorporates movable and adjustable attachment points that can adapt to different exercise positions and user needs. The handle includes swiveling mechanisms and adjustable components that maintain stable attachment while allowing dynamic movement, resolving the contradiction between stability and movement freedom.
3Device complexity
If metal-on-metal contact is used in spinning handles, then mechanical simplicity is maintained, but noise generation increases
Solution Approach 1:
The patent introduces intermediate elements such as rubber grips, plastic components, or lubricated surfaces between metal parts that contact during spinning motion. These intermediaries reduce friction and noise while maintaining the simple mechanical structure, resolving the contradiction between mechanical simplicity and noise reduction.
4Strength
If attachment points are located away from the gripping point, then structural integrity is improved, but grip control is reduced
Solution Approach 1:
The patent employs an asymmetric design where the cable attachment point is positioned centrally within the handle structure, close to the gripping area, while the overall handle maintains structural integrity through its asymmetric geometry and material distribution. This asymmetric configuration improves grip control without compromising structural strength.
Data Source
AI summary
A center pull cable handle apparatus includes a length of hollow cylindrical steel tube. An outer grip layer is provided on the cylindrical tube. The grip layer and the tube each have a wall opening. A length of aircraft cable having a first cable end extends through the wall opening and is crimped in position inside the steel tube with a cable nut. A connector is provided on an opposite cable end. A length of a soft flexible tubing surrounds the cable between the grip layer and the connector. When a user grasps the handle the first cable end is located inside the grasp of the user and said cable and tubing pass between two fingers of the user.