Articulated Support Arm With Friction-Held Parallelogram Motion
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Solution Overview
Problem
Existing articulated supporting arms lack the ability to perform a parallelogram-type movement, which would allow for horizontal or vertical displacement of the end while maintaining the angular position relative to vertical or horizontal references, limiting their adjustability and functionality.
Innovation Solution
The proposed articulated supporting arm uses a combination of rigid and flexible sections with overlapping flat strips and a compressive covering to create a system where the flexible sections can bend in a plane perpendicular to their sides, utilizing static and dynamic friction to maintain position changes, allowing for a parallelogram-type movement by linking multiple flexible sections to achieve linear displacement without altering the angle of rigid sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If overlapping flat strips with compressive covering are used to create flexible sections, then the arm can maintain adjusted positions through friction, but the structure becomes more complex
Solution Approach 1:
The supporting arm is divided into multiple flexible sections, each composed of overlapping flat strips. This segmentation allows each section to independently contribute to friction-based position holding while maintaining overall arm functionality.
Solution Approach 2:
The flexible sections use a composite structure combining multiple flat strips with a compressive covering layer. This composite design creates sufficient friction between layers to maintain position stability without requiring additional complex locking mechanisms.
2Stability of the object's composition
If flexible sections are made from overlapping flat strips with compressive covering, then lateral displacement is prevented, but the manufacturing process becomes more difficult
Solution Approach 1:
The compressive covering acts as a thin film layer that wraps around the overlapping flat strips, preventing lateral displacement while allowing longitudinal flexibility. This thin-film approach simplifies manufacturing compared to rigid constraint structures.
3Adaptability or versatility
If the arm is designed to perform parallelogram-type movement, then adjustability is improved, but the mechanism becomes more complex
Solution Approach 1:
The arm incorporates flexible sections that can dynamically bend and deform to enable parallelogram-type movement. This dynamic flexibility allows the arm to achieve complex motion patterns without requiring additional rigid joints or mechanical linkages.
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
This configuration enables the supporting arm to maintain adjusted positions without returning to its original state, allowing for precise linear displacement of the end while maintaining the angle of the rigid sections, thus enhancing adjustability and functionality.
Implementation Method 1
a compressive covering pressing the plurality of mutually overlapping flat strips in a radial direction, pressing the flat sides together, increasing the friction therebetween
Implementation Method 2
Each flat strip may be elastically bent by applying a force in a direction normal to its flat sides greater than the elastic force applied by the flat strip
Data Source
AI summary
A articulated supporting arm, comprising rigid sections articulated by means of flexible sections, the flexible sections comprising: a plurality of flat strips elongated in a longitudinal direction, each having two flat sides parallel to the longitudinal direction, said flat strips being mutually overlapping and in close contact through said flat sides; a compressive covering that presses the plurality of mutually overlapping flat strips in a radial direction, pressing the flat sides together, increasing the friction therebetween and preventing their lateral displacement; the arm comprising at least one first, second, and third rigid sections and one first and second alternating flexible sections; and each of the flat strips other than an anchoring strip being attached to the entirety of the remaining flat strips at a first end of said flat strips comprised on the first rigid section.