Bicycle Shifting Device Selective Release Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bicycle operating devices lack a mechanism for efficient and precise control of bicycle components, particularly in shifting and braking operations, due to the complexity of coordinating multiple release members and select members, which can lead to mechanical interference and reduced operational efficiency.
Innovation Solution
A bicycle operating device comprising a support structure with movably supported first and second release members, a select member, and a control body with a biasing element, allowing for coordinated movement of these components to prevent mechanical interference and enhance operational efficiency, specifically through the use of pawls and maintaining members to manage cable release and pulling operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple release members and select members are coordinated for precise control, then control precision is improved, but device complexity increases
Solution Approach 1:
The operating device is segmented into distinct functional components: a first release member for releasing the first cable, a second release member for releasing the second cable, and a select member for choosing between them. Each component operates independently within its specific functional zone, allowing precise control while managing complexity through modular design.
Solution Approach 2:
The select member introduces a third dimension of control by being movable between a first select position and a second select position. This dimensional addition allows the system to select between different release members without increasing the complexity of individual release mechanisms, as the selection occurs in a separate operational dimension.
2Ease of operation
If release members are made movable for operational flexibility, then ease of operation is improved, but mechanical interference increases
Solution Approach 1:
Each release member is designed with localized engagement features that interact only with specific corresponding components: the first release member engages the first cable in a first engagement position, while the second release member engages the second cable in a second engagement position. This local specialization ensures that movement of one release member does not cause mechanical interference with the other, as each operates in its designated functional zone.
Solution Approach 2:
The select member acts as an intermediary that mediates between the first and second release members. When positioned in the first select position, it enables the first release member to operate while preventing the second release member from moving. Conversely, when positioned in the second select position, it enables the second release member while preventing the first. This intermediary mechanism allows operational flexibility while eliminating mechanical interference through selective engagement control.
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 solution enables smooth and precise control of bicycle components, reducing mechanical interference and improving operational efficiency by allowing selective movement of release members and preventing unintended engagement, thus enhancing the overall performance of shifting and braking operations.
Implementation Method 1
a biasing element operatively coupled between the control body and the select member and biases the select member and the control body in opposite directions relative to each other
Data Source
AI summary
A bicycle operating device is basically provided with a support structure, a first release member, a second release member and a select member. The first release member is movably supported on the support structure between a first non-releasing position and a first releasing position. The second release member is movably supported on the support structure between a second non-releasing position and a second releasing position. The select member is movably supported on the support structure between at least a first select position and a second select position. The select member permits movement of the first release member and prevents movement of the second release member while the select member is in the first select position. The select member permits movement of the second release member and prevents movement of the first release member while the select member is in the second select position.