L-Shaped Doorway Frame with Telescoping Securing Member
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Solution Overview
Problem
Existing portable doorway recreation apparatuses fail to securely support equipment under both vertical and horizontal loads, particularly during dynamic movements like swinging, as they tend to disengage from the doorway trim, leading to instability.
Innovation Solution
A portable doorway recreation device featuring an L-shaped frame with a securing member that includes a locking bar or pad system, utilizing telescoping struts and turnbuckles to maintain contact with the doorway frame, ensuring stability under both vertical and horizontal forces by adjusting the distance between the locking bar and the pull-up bar to match the doorway thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a simple L-shaped frame with horizontal support and bar is used, then the device is easy to manufacture and install, but it cannot securely support equipment under horizontal loads like swinging
Solution Approach 1:
The device is divided into distinct functional segments: the L-shaped frame provides basic support, while the separate securing member with locking bar and telescoping struts provides horizontal load resistance. This segmentation allows each component to be optimized for its specific function without requiring complete redesign of the entire structure.
Solution Approach 2:
The telescoping struts provide dynamic adjustment capability, allowing the securing member to adapt to different doorway thicknesses and maintain optimal contact pressure. The struts can extend or compress to accommodate variations in installation conditions while maintaining secure engagement.
2Reliability
If the horizontal bar is designed to engage the doorway trim simply, then installation is easy, but the horizontal bar disengages during swinging motion
Solution Approach 1:
The securing member acts as an intermediary between the L-shaped frame and the doorway frame. It transfers and distributes loads more effectively, preventing direct disengagement of the horizontal bar while maintaining simple installation through the same basic engagement mechanism.
Solution Approach 2:
The securing member with locking bar engages the doorway frame in advance to prevent the horizontal bar from disengaging during swinging motion. By establishing this preliminary secure connection, the system proactively counteracts the disengagement force before it can cause failure.
3Reliability
If an adjustable safety lock is added to provide stability under horizontal loads, then engagement stability improves, but the device becomes more complex and difficult to install
Solution Approach 1:
The securing member combines multiple functions into a single integrated component: it provides horizontal load resistance, adjusts to doorway thickness variations, and maintains engagement stability all through one unified structure rather than multiple separate mechanisms.
Solution Approach 2:
The securing member serves multiple purposes: it acts as a horizontal support, a locking mechanism, and an adjustment device for different doorway configurations. This multi-functionality reduces the need for additional specialized components while achieving comprehensive engagement stability.
Data Source
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AI summary
A portable doorway recreation device for use on a doorway frame comprises an L-shaped frame. A first horizontal elongate bar is attached to a riser of the L-shaped frame and a second horizontal elongate bar is attached to a base of the L-shaped frame. A securing member is operatively associated with the second elongate bar, wherein with the first elongate bar sitting on a top of the doorway frame on a first wall side and the second elongate bar in contact with a second wall side, the securing member engages one of the first and second wall sides to prevent movement of the second elongate bar away from the second wall side.