Bicycle Shifting Device with Nested Adjustment Mechanism
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Solution Overview
Problem
Current bicycle operating devices lack adjustable mechanisms that allow for precise positioning of operating members relative to the bicycle body, leading to suboptimal operation and potential structural complexity.
Innovation Solution
A bicycle operating device comprising a base member, cable control body, operating member, supporting structure, and adjusting structure, where the adjusting structure allows for the adjustable positioning of the supporting structure and operating member relative to the base member, enabling fine adjustments and simplifying the structure by integrating components like a pivot shaft and clamping mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an adjusting structure is added to enable precise positioning of the operating member, then the positioning precision is improved, but the device complexity increases
Solution Approach 1:
The adjusting structure is nested within the existing base member and cable control body assembly. The adjusting member integrates with the pivot shaft mechanism, allowing precise positioning functionality to be embedded within the existing structural framework rather than adding entirely separate components.
Solution Approach 2:
The pivot shaft serves multiple functions: it acts as both the rotation axis for the cable control body and as the element being adjusted by the adjusting structure. The adjusting member itself serves dual purposes as both an adjustment mechanism and a positioning element.
2Device complexity
If the cable control body is integrally provided with the operating member as a single unitary member, then the device complexity is reduced, but the reliability may worsen due to increased stress concentration
Solution Approach 1:
The cable control body and operating member are merged into a single unitary member that rotates about the pivot shaft. This integration eliminates the need for separate coupling mechanisms between these components, simplifying the overall structure while maintaining functional integrity through the shared rotation axis.
3Ease of operation
If the adjusting structure is made accessible from outside the housing, then the ease of operation is improved, but the structural integrity may worsen due to additional access points
Solution Approach 1:
The adjusting member extends through the housing to provide external accessibility, acting as an intermediary element that transmits adjustment forces from the external environment to the internal pivot shaft mechanism. This allows users to perform adjustments without disassembling the housing while maintaining the housing's protective function.
Data Source
AI summary
A bicycle operating device comprises a base member, a cable control body, an operating member, a supporting structure, and an adjusting structure. The cable control body is configured to be pivotably mounted to the base member about a pivot axis to control a control cable. The operating member is configured to be movably mounted to the base member from a rest position to an operated position to move the cable control body. The supporting structure is configured to pivotably support the cable control body relative to the base member. The supporting structure is provided to the base member so as to at least partly intersect with the pivot axis. The adjusting structure is configured to adjustably position the supporting structure relative to the base member such that the rest position of the operating member is adjusted relative to the base member.