Extendable Level Braking Mechanism for Coplanar Working Surfaces
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Solution Overview
Problem
Existing extendable levels face challenges in maintaining a continuous coplanar working surface while providing a robust and easy-to-use extendable body design and locking/braking mechanism.
Innovation Solution
The level features a frame with a braking mechanism that includes bushings with springs to maintain contact and provide adjustable friction, ensuring smooth and stable motion between level sections, and a design that keeps the working surfaces coplanar regardless of the level's adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a braking mechanism is added to control friction between frame and extension, then ease of operation is improved, but device complexity increases
Solution Approach 1:
A braking mechanism is introduced as an intermediary component between the frame and extension. This brake includes a friction surface that contacts the extension and can be adjusted via a screw mechanism, providing controlled friction to maintain the extension at desired positions without requiring complex locking mechanisms
Solution Approach 2:
The braking mechanism allows adjustment of the friction parameter between the frame and extension. By varying the brake engagement through the screw adjustment, the user can control the amount of friction, enabling easy positioning at any extension length rather than being constrained to fixed positions
2Reliability
If bushings with springs are used to maintain contact between frame and extension, then reliability is improved, but device complexity increases
Solution Approach 1:
Spring-loaded bushings are positioned at multiple locations between the frame and extension to provide continuous contact force. The springs act as counterbalancing elements that maintain constant pressure on the friction surfaces, ensuring reliable contact and friction control throughout the extension range
Solution Approach 2:
The braking and contact maintenance system is divided into multiple independent bushing units distributed along the extension path. Each bushing with its spring operates independently, allowing the system to maintain reliability through distributed contact points rather than relying on a single complex mechanism
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 allows for a wide range of adjustable lengths, maintaining a continuous coplanar working surface, and provides a robust and user-friendly mechanism for adjusting the level's length and controlling friction.
Implementation Method 1
The level comprises one or more bushings that comprise a spring exerting a force between the frame and the extension
Implementation Method 2
The level comprises a braking mechanism that frictionally resists movement between the frame and the extension
Data Source
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AI summary
An extendible or adjustable length is provided. The level includes a frame, a slidable body member, a bushing and a braking mechanism. The slidable body member is coupled to the frame and extends and retracts along the frame's longitudinal axis. The bushing is coupled to one of the frame or the slidable body member and couples the frame and the slidable body member.