Door Guardrail with Internal Support Rod for Compact Storage
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Solution Overview
Problem
Existing door guardrails have an overall size that cannot be further reduced, leading to high packaging and transportation costs.
Innovation Solution
A door guardrail design without exposed support rods, featuring a fabric winding tube, a handlebar, a mesh fabric, a spring device for automatic retraction, and a lock device to control the fabric length, all housed within a compact shell and base.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the support rod is exposed on the exterior of the door guardrail, then the structural strength and stability are improved, but the overall size increases leading to higher packaging and transportation costs
Solution Approach 1:
The support rod is nested inside the fabric winding tube, with the fabric wound around the support rod. This nesting arrangement allows the support rod to provide structural strength while being contained within the tube, reducing the overall exterior dimensions and eliminating exposed support rods.
Solution Approach 2:
The support rod is repositioned from an external longitudinal element to an internal element along the longitudinal axis of the fabric winding tube. This dimensional repositioning maintains the support function while consolidating the structure within the tube's volume, reducing packaging footprint.
2Volume of moving object
If the support rod is placed inside the fabric winding tube, then the overall size is reduced, but the structural stability may be compromised
Solution Approach 1:
The support rod is nested within the fabric winding tube with the mesh fabric wound around it, creating a concentric nested structure. This arrangement ensures the support rod remains internally positioned while maintaining structural stability through the layered construction of tube-fabric-support rod assembly.
Solution Approach 2:
The support rod, fabric winding tube, and mesh fabric are merged into an integrated assembly where the support rod serves as the central core, the fabric is wound around it, and the tube encloses both. This merging creates a unified structure that maintains stability while minimizing overall dimensions.
3Volume of moving object
If the door guardrail components are compacted to reduce size, then packaging and transportation costs decrease, but the complexity of the locking mechanism increases
Solution Approach 1:
The locking mechanism uses a dynamic swing rod that can pivot between locked and unlocked positions, controlled by spring forces. This dynamic design allows compact storage while maintaining functionality through mechanical motion rather than complex multi-component systems.
Solution Approach 2:
The spring-loaded swing rod automatically returns to the locked position after fabric extension, and the tooth portion automatically engages with the swing rod's protrusion. This self-service locking mechanism reduces complexity by eliminating the need for manual resetting or complex control systems.
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 allows for strict control of the storage size of the door guardrail, effectively reducing packaging and transportation costs while maintaining functionality.
Implementation Method 1
a spring device allowing the mesh fabric to retract automatically after being pulled out is disposed around the support rod
Implementation Method 2
the mesh fabric pushed out is kept in a tensioned state under the action of the force of a spring
Implementation Method 3
a second return spring is arranged on a side face perpendicular to the swing rod, and the swing rod is in snap fit with the tooth portion under the action of the second return spring
Data Source
AI summary
A door guardrail without exposed support rods, comprising a fabric winding tube and a handlebar arranged on an outer side of the fabric winding tube, a mesh fabric being arranged between the fabric winding tube and the handlebar, a support rod is arranged in the fabric winding tube, a spring device allowing the mesh fabric to retract automatically after being pulled out is disposed around the support rod, a lock device used for controlling a length of the mesh fabric pulled out is arranged at an end of the support rod. The support rod is arranged in the fabric winding tube, and the spring device is disposed around the support rod to allow the mesh fabric to retract automatically after being pulled out, such that the storage size of the door guardrail can be strictly controlled, thus effectively controlling packaging and transportation costs.