Bicycle Shift Cable Guide Lateral Routing
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Solution Overview
Problem
Existing bicycle shift operating devices often cause discomfort due to the routing of control cables along the handlebar, leading to an uncomfortable grip for riders during operation.
Innovation Solution
A bicycle shift operating device with a bracket featuring a shift cable guide along its lateral side, allowing the shift cable to be routed non-parallel to the rotational plane of the spool, thereby guiding it along the handlebar in a manner that avoids the top surface and provides a more comfortable grip for the rider.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shift cable is routed along the top surface of the handlebar, then the cable routing is simple and direct, but the rider's hand grip becomes uncomfortable during operation
Solution Approach 1:
The patent applies dimensionality change by routing the shift cable along the lateral side of the handlebar (side dimension) rather than along the top surface (horizontal dimension). This spatial reconfiguration allows the cable to pass through a guide groove on the lateral side, directing it away from the rider's hand grip area while maintaining effective cable tension and operation. The cable guide groove structure enables this three-dimensional routing optimization.
2Ease of operation
If the shift cable guide is positioned to improve grip comfort, then rider comfort improves, but the cable routing path becomes more complex
Solution Approach 1:
The patent applies local quality by implementing a cable guide groove specifically at the lateral side of the handlebar where the cable needs to be directed. Rather than redesigning the entire handlebar structure, the solution focuses on adding a localized guiding feature (the groove with specific orientation) that modifies the cable path only in the critical area. This localized intervention improves grip comfort without requiring complex overall structural changes.
Data Source
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AI summary
A bicycle shift operating device basically comprises a bracket, a shift lever and a shift operating unit. The bracket includes a grip section having a lateral side with a shift cable guide portion. The lateral side faces towards a bicycle longitudinal center plane when the shift operating device is in an installed position. The shift lever is pivotally mounted to the bracket. The shift operating unit is mounted on the bracket. The shift operating unit includes a spool. The spool is rotated in a rotational plane in accordance with movement of the shift lever to wind a shift cable extending from the spool to the lateral side. The shift cable guide portion is arranged at the lateral side of the bracket such that the shift cable guide portion guides the shift cable along a guiding direction that is non-parallel to the rotational plane of the spool.