Bicycle Shift Lever Rest Position Adjustment and Cable Retention
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Solution Overview
Problem
Conventional bicycle operating devices lack adjustability and ease of use, particularly in terms of rest position adjustment and cable management, which affects the usability and operability of bicycle components.
Innovation Solution
A bicycle operating device with a base, user-operated input, and cable actuator that allows for adjustable rest positions, pivotable and sliding components, and a positioning ratchet and holder system for reliable cable attachment and release, enabling improved usability and operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional bicycle operating device is used with a fixed rest position, then the structure is simple, but the usability is poor due to lack of adjustability
Solution Approach 1:
The positioning abutment is made movable between a first abutment position and a second abutment position, allowing the rest position of the user operated input to be dynamically adjusted. This enables the device to adapt to different usage scenarios while maintaining a relatively simple overall structure.
Solution Approach 2:
The positioning abutment acts as an intermediary component between the user operated input and the base. By moving the positioning abutment between different positions, the rest position of the user operated input is adjusted without requiring complex adjustment mechanisms.
2Ease of operation
If the positioning abutment is pivotally arranged, then the device allows operation in multiple directions improving ease of use, but the mechanism becomes more complex
Solution Approach 1:
The positioning abutment combines both pivotal and sliding movements into a single component. This merging of movement types allows the device to operate in multiple directions (pivoting) and adjust rest positions (sliding) without requiring separate mechanisms for each function.
Solution Approach 2:
The positioning abutment serves multiple functions: it positions the user operated input at different rest positions through sliding movement, and it enables multi-directional operation through pivotal movement. This multi-functionality reduces the need for additional components.
3Ease of operation
If the ratchet and cable holder are separate pieces, then the cable management is improved, but the reliability of cable attachment may be compromised
Solution Approach 1:
The positioning ratchet acts as an intermediary between the cable holder and the cable. It provides a reliable attachment point for the cable while maintaining the benefit of separate pieces for improved cable management. The ratchet mechanism ensures secure cable attachment.
Solution Approach 2:
The cable management system is segmented into separate components (cable holder and positioning ratchet) that work together. This segmentation allows for improved cable management while the interlocking mechanism between the segments ensures reliable cable attachment.
Data Source
AI summary
A bicycle operating device comprises a base, a user operated input, a cable actuator and a positioning abutment. The user operated input is movably arranged with respect to the base from a rest position towards an operated position. The cable actuator is movably arranged with respect to the base in response to movement of the user operated input between at least first and second cable holding positions. The positioning abutment is movably supported on the base between at least a first abutment position and a second abutment position. The positioning abutment selectively engages the user operated input to position the user operated input at an adjusted rest position in a state after the user operated input has been moved from the rest position to the operated position. The adjusted rest position is different from the rest position.