Motorcycle Arm Rest Assembly with Dynamic Locking Mechanism
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Solution Overview
Problem
Existing passenger arm rest assemblies for motorcycles lack secure mechanisms to prevent unwanted rotation and vertical movement during operation, posing safety risks.
Innovation Solution
An adjustable arm rest assembly with a shaft, annular slots, and a locking mechanism that includes a user-operated button and a biasing element to control vertical and rotational movement, utilizing a groove and peg system to secure the arm rest in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the arm rest is made adjustable with rotation and vertical movement capability, then passenger comfort is improved, but safety deteriorates due to unwanted movement during operation
Solution Approach 1:
The arm rest assembly employs a dynamic locking mechanism that transitions between locked and unlocked states. The button-operated release mechanism allows the arm rest to be easily adjusted when needed, while automatically securing in position during normal operation, thus providing both adjustability and stability
Solution Approach 2:
The system changes the state parameter of the arm rest from fixed to movable and back to fixed through the locking mechanism. The button actuation changes the engagement state of the locking components, allowing parameter adjustment when needed and maintaining stability during operation
2Reliability
If a locking mechanism is added to prevent unwanted movement, then safety is improved, but device complexity increases
Solution Approach 1:
The locking mechanism is designed to be self-securing through spring-loaded components that automatically engage the locking positions. The button-operated release allows manual unlocking, but the system self-maintains its locked state without requiring additional actuators or complex control systems
Solution Approach 2:
The button serves as an intermediary element that simplifies the user interaction with the complex locking mechanism. By providing a simple push-button interface, the complex internal locking components can be engaged or disengaged with minimal user effort, masking the underlying complexity
3Reliability
If the arm rest is secured to prevent vertical movement, then safety is improved, but ease of adjustment deteriorates
Solution Approach 1:
The vertical adjustment mechanism employs dynamic locking positions along the shaft. The button-operated release allows temporary disengagement from these locked positions, enabling smooth vertical movement, after which the mechanism automatically locks into the next available position, providing both ease of adjustment and positional stability
Data Source
AI summary
An arm rest assembly for a motorcycle is provided having a housing that receives a shaft of the arm rest. A user-operated button is movable between a first position to prevent vertical movement of the support relative to the housing, and a second position to permit vertical movement of the support. A locking mechanism is operable to secure a second sleeve of the assembly to a first sleeve of the assembly to prevent relative movement between the first sleeve and the second sleeve.