Bistable Retractable Arm With Flexible Conductor Connectivity
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Solution Overview
Problem
Conventional retractable mechanisms face challenges in maintaining structural rigidity, compactness, and continuous electrical connectivity, particularly in telescoping systems with complex wiring and mechanical stress, limiting their adaptability for modular components.
Innovation Solution
A retractable arm configured with bistability and a flexible conductor, such as a flexible printed circuit (FPC), integrated with rotary joint assemblies and deployment rails, ensuring structural rigidity, compact storage, and uninterrupted electrical connectivity through mechanisms like tensioning, electroactive materials, and rotary joint assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If telescoping mechanisms are used to extend rigid surfaces, then structural rigidity is improved, but mechanical complexity and device complexity increase
Solution Approach 1:
The retractable arm is divided into multiple segments that can extend and retract independently. Each segment contains its own flexible conductor, allowing the arm to achieve extended rigid structures while maintaining compact retraction and reducing mechanical complexity through modular design
Solution Approach 2:
The arm transitions between static extended positions (providing rigidity) and dynamic retraction (providing compactness). The flexible conductor dynamically adapts to the arm's movement, maintaining electrical connectivity throughout the transformation between states
2Strength
If telescoping mechanisms are used for extension, then structural rigidity is improved, but wear at joints and reliability worsen
Solution Approach 1:
By segmenting the arm into multiple sections with flexible conductors in each, the patent eliminates complex interlocking joints and reduces wear points. The flexible conductor's continuous flexing design withstands repeated extension and retraction cycles better than conventional rigid wiring at mechanical joints
3Reliability
If conventional wiring solutions are used in retractable mechanisms, then electrical connectivity is maintained, but space efficiency and compactness worsen
Solution Approach 1:
The flexible conductor is integrated directly into the retractable arm structure itself, merging the electrical connectivity function with the mechanical structure. This eliminates separate cable routing channels and reduces the overall volume required for wiring, enabling compact design while maintaining continuous electrical connection during movement
4Stability of the object's composition
If rigid structures are used for stability, then structural rigidity is improved, but compactness and space utilization worsen
Solution Approach 1:
The retractable arm dynamically transitions between an extended rigid state (providing structural stability for modular components) and a retracted compact state (minimizing space usage). The flexible conductor enables this dynamic transformation by maintaining electrical connectivity through the full range of motion, allowing the structure to adapt its rigidity and volume as needed
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 solution provides a compact, durable, and adaptable design that maintains electrical connectivity and structural stability during extension and retraction, suitable for modular devices in consumer electronics and robotics.
Implementation Method 1
a flexible conductor (such as a flexible printed circuit (FPC)) for maintaining continuous electrical connectivity
Implementation Method 2
controlled friction interfaces, or voltage-activated materials such as electroactive polymers or shape-memory alloys, which adjust stiffness based on applied current
Implementation Method 3
an arm comprising a bistable strip configured to transition between two stable states: an extended rigid position and a compact retracted form
Data Source
AI summary
An apparatus and system for managing a retractable arm configured with a flexible conductor for continuous electrical connectivity are described. The apparatus includes a housing supporting the retractable arm, operable to extend and retract along a defined movement path. A support assembly guides the arm using curvature structures or other mechanisms for stable positioning. The retractable arm exhibits bistability to maintain rigid extended and compact retracted states. A flexible conductor maintains continuous electrical connectivity between a modular device and a controller via a rotary joint assembly, which permits rotational movement while preserving signal and power connections. A horizontal movement track provides structural guidance for lateral positioning, while deployment rails provide structural alignment. One or more sensors enable dynamic adjustment of arm operations based on environmental conditions or proximity information. The controller executes control signals to reposition the arm, enabling obstacle detection, clear path validation, and safety protocols.