Door Frame Exercise System with Retractable Pin Cross Bars
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Solution Overview
Problem
Existing home exercise systems that attach to door frames often interfere with the door's functionality, preventing it from closing and compromising visual privacy and sound exclusion, and are difficult to install and uninstall without causing damage.
Innovation Solution
A door frame exercise system featuring elongated brackets that attach to the door frame's vertical jambs without obstructing the door's closure, using cross bars with retractable pins and apertures to securely hold exercise equipment at various heights, allowing for easy installation and removal without damaging the door frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If exercise equipment is installed at a door threshold, then exercise functionality is provided, but the door cannot be closed and door functions are compromised
Solution Approach 1:
The exercise equipment is divided into separate components: a door-mounted support structure and removable exercise elements (bars, ropes, etc.). This segmentation allows the support to remain installed on the door frame while exercise components can be attached or removed based on usage needs, enabling door closure when exercise equipment is not in use.
Solution Approach 2:
The exercise equipment incorporates movable and adjustable components including bars that can be inserted or removed from the door frame, and exercise elements that can be attached or detached. This dynamic design allows the system to transition between providing exercise functionality and allowing normal door operation.
2Adaptability or versatility
If exercise equipment is installed at a door threshold, then exercise functionality is provided, but visual privacy and sound exclusion are compromised
Solution Approach 1:
The exercise components (bars, ropes, etc.) are extracted as separate removable elements from the door structure itself. When not in use, these components can be removed or stored, allowing the door to maintain its full privacy and sound exclusion capabilities. Only the minimal necessary support structure remains mounted on the door frame.
Solution Approach 2:
The system transitions between having exercise components installed and having them removed, allowing the door to dynamically switch between providing exercise functionality and maintaining full privacy/sound exclusion properties.
3Adaptability or versatility
If exercise equipment is installed on a door frame, then exercise functionality is provided, but installation and uninstallation are difficult and may cause damage
Solution Approach 1:
The support structure is divided into modular components that can be independently assembled and disassembled. The door-mounted supports are separate from the exercise bars and other exercise elements, allowing each component to be installed and removed without affecting the others, simplifying both installation and uninstallation processes.
Solution Approach 2:
The door-mounted support structures are pre-assembled and designed with pre-drilled holes and attachment points, allowing for straightforward installation without requiring complex on-site assembly or modifications to the door frame.
Data Source
AI summary
An exercise apparatus for attachment and use within a door frame includes a pair of elongated frame elements with each having apertures configured to receive various types of cross bars. The frame elements are designed to be secured to vertical portions of a door frame without interfering with passing through the doorway or closing the door. A cross bar having a length greater than the door width is configured to be received within corresponding apertures among the frame elements. A cross bar has a retractable spring pin protruding from the bar so that the spring pin may engage a frame element to limit axial excursion of the bar. Two such spring pins may be included in the bar, so that with the frame elements including apertures having pin-receiving pockets, one type of bar may rotate freely while another type of bar is prevented from rotation.