Bicycle Operating Device with Dual Pivot Axes
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Solution Overview
Problem
Current bicycle operating devices lack efficient mechanisms for smoothly transitioning between different operational positions, leading to complex structures and reduced user control over bicycle components like seatpost adjustments.
Innovation Solution
A bicycle operating device comprising a base member, an operating member, and a movable member that utilizes a biasing structure and distinct pivot axes to manage an operation cable's movement in both pulling and releasing directions, allowing for seamless transitions between operational positions with varying amounts of movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional bicycle operating device is used, then the structure becomes complex, but the control precision and smoothness of operation cable management deteriorate
Solution Approach 1:
The operating device is divided into distinct functional segments: a base member with first and second pivot axes, an operating member that can pivot independently, and a movable member that manages the operation cable. This segmentation allows each component to perform its specific function efficiently, reducing overall structural complexity while maintaining precise control through defined pivot points and movement paths.
2Ease of operation
If the operating member moves between positions, then the bicycle component can be operated, but the transition between positions is not smooth
Solution Approach 1:
The operating member is designed to pivot dynamically between a first position and a second position relative to the base member, with the movable member facilitating smooth transitions. The biasing structure provides dynamic force to assist the operating member during position changes, ensuring smooth and controlled movement without abrupt transitions, thereby enhancing ease of operation.
3Manufacturing precision
If the movable member moves different amounts for different operations, then precise control is achieved, but the device complexity increases
Solution Approach 1:
The movable member is configured to change its movement parameters based on the operating member's position. When the operating member pivots to the first position, the movable member moves a first amount; when pivoted to the second position, it moves a second amount different from the first. This parameter change is achieved through the geometric relationship between the pivot axes and the biasing structure, providing precise control for different operations (e.g., seatpost height adjustments at different intervals) without requiring complex additional mechanisms.
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
Enables simplified and precise control over bicycle components by allowing smooth operation cable management, reducing structural complexity and enhancing user control through defined operational positions.
Implementation Method 1
a bicycle operating device according to the first aspect further comprises a biasing structure configured to bias the movable member relative to the base member so that the operation cable is moved relative to the base member in the releasing direction in response to the release of the operating member from each of the first operated position and the second operated position
Data Source
AI summary
A bicycle operating device comprises a base member, an operating member, and a movable member. The movable member is configured to move an operation cable in a pulling direction to operate a bicycle component in response to a first movement of the operating member. The movable member is configured such that the operation cable is movable in a releasing direction in response to a release of the operating member from a first operated position. The movable member is configured to move the operation cable in the pulling direction to operate the bicycle component in response to a second movement of the operating member. The movable member is configured such that the operation cable is movable in the releasing direction in response to a release of the operating member from a second operated position.