Handlebar Operating Device With Angled Biasing and Axial Control
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Solution Overview
Problem
Existing bicycle operating devices are often bulky and complex, making them difficult to assemble and operate efficiently, particularly when integrated with handlebars.
Innovation Solution
A compact operating device for human-powered vehicles, featuring a base member and an operating member with a biasing mechanism that allows for easy assembly and restricted axial movement, utilizing a snap-fit connection and biasing members to facilitate smooth rotation and precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional bicycle operating device is used, then the device can operate bicycle components, but the device becomes bulky and complex
Solution Approach 1:
The operating device is divided into distinct functional segments: a base member for mounting, an operating member for user input, and a biasing member for positioning. This segmentation allows each component to be optimized independently, reducing overall complexity while maintaining operational reliability through specialized function distribution.
Solution Approach 2:
The biasing member is positioned within the space between the base member and operating member, effectively nesting components within each other's spatial envelope. This nesting arrangement reduces the overall device footprint and complexity while ensuring reliable operation through compact integration of all necessary elements.
2Volume of moving object
If the operating device is made compact, then the radial and axial dimensions are reduced, but the assembly becomes more difficult
Solution Approach 1:
The biasing member is pre-configured with engagement features that align with corresponding features on the operating member and base member. This preliminary configuration of engagement interfaces allows for simplified assembly despite the compact dimensions, as components are designed to fit together intuitively without complex alignment procedures.
Solution Approach 2:
Specific regions of the components are designed with localized engagement features such as abutments and contact surfaces positioned at precise locations. This local quality approach ensures that the compact device can be easily assembled through targeted engagement points rather than requiring complex overall alignment, maintaining ease of manufacture despite reduced dimensions.
3Ease of operation
If the operating member rotates freely, then the operation is smooth, but the axial movement cannot be restricted
Solution Approach 1:
The biasing member is designed with an asymmetric configuration where the biasing force is applied at an angle non-perpendicular to the axial direction. This asymmetric force application creates a mechanical interaction that naturally restricts axial movement while preserving rotational freedom, as the angled biasing force generates stabilizing moment components without impeding rotation about the axis.
Solution Approach 2:
The biasing member acts as an intermediary element between the operating member and base member, mediating the mechanical interaction to simultaneously achieve rotational freedom and axial restriction. Through its specific engagement geometry, the biasing member translates rotational motion into controlled operation while preventing unwanted axial displacement, effectively decoupling these two degrees of freedom.
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 device is more compact, easier to assemble, and provides reliable operation with reduced friction, allowing for precise control of bicycle components through a simplified mechanism.
Implementation Method 1
The biasing member biases the operating member in a direction that is non-perpendicular to the axial direction
Implementation Method 2
The first contact surface annularly contacts the first axial abutment
Data Source
AI summary
An operating device is provided for a human-powered vehicle. The operating device basically includes a base member, an operating member and a biasing member. The base member is configured to be provided to a handlebar and having a center axis defining an axial direction and a radial direction. The operating member is configured to rotate relative to the base member about the center axis. The biasing member biases the operating member in a direction that is non-perpendicular to the axial direction. The operating member includes a plurality of positioning abutments. The biasing member is configured to selectively engage the positioning abutments.