Doorway Pull-up Bar Finger Hold Weight Distribution
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Solution Overview
Problem
Existing exercise devices, such as pull-up bars, often lack a secure and stable mechanism to distribute the user's weight evenly across a doorway, leading to instability during exercises and potential damage to the door frame.
Innovation Solution
A doorway engaging portion with a finger hold that includes a ridge or groove to securely support the user's fingertips, distributing the weight through a frame and providing a stable surface for arm exercises, combined with cushion members to prevent damage to the door casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pull-up bar is installed in a doorway to enable arm exercises, then exercise functionality is provided, but the door frame may be damaged due to concentrated weight loading
Solution Approach 1:
The weight-bearing function is segmented from the door frame contact points. The bar structure distributes the load across multiple contact points (lintel engagement and side bar contacts) rather than concentrating force at single points, reducing damage risk to the door frame while maintaining exercise functionality
Solution Approach 2:
The bar assembly acts as an intermediary structure between the user and the door frame. It transfers and distributes the user's weight through its structural components (lintel engaging portion, side bars, transverse bar) to multiple door frame contact points, preventing direct concentrated loading that could damage the door frame
2Reliability
If a traditional pull-up bar is used without specialized hand holds, then simple grip exercises are possible, but secure and stable weight distribution across the doorway is not achieved
Solution Approach 1:
The hand hold is segmented into distinct functional zones: the ridge for finger placement, the groove for finger reception, and the cushion member for palm support. This segmentation allows precise weight distribution across different parts of the user's hand, improving stability without requiring complex overall bar结构设计
Solution Approach 2:
Different portions of the bar structure are given different local qualities optimized for their specific functions: the lintel engaging portion for secure overhead attachment, the side bars with cushion members for protected door frame contact, and the transverse bar with ridge and groove for precise hand positioning. This local optimization achieves reliable weight distribution without unnecessary overall complexity
Data Source
AI summary
An exercise apparatus includes a doorway engaging portion configured to releasably secure the exercise apparatus in a doorway and distribute a weight of a user of the exercise apparatus through a frame of the doorway. The exercise apparatus also includes a finger hold mounted to the doorway engaging portion, the finger hold comprising a ridge or groove shaped and sized to receive the fingertips of the user. When the doorway engaging portion is releasably securing the exercise apparatus in the doorway, the user may insert the fingertips around the ridge or into the groove of the finger hold, and perform an exercise by supporting an entirety of the weight of the user through the frame of the doorway via the finger hold. A method of exercising using an exercise device having a doorway engaging portion and a finger hold configured to receive the fingertips of a user, is also disclosed.