Bicycle Shifter Bracket with Segmented Interior for Large Unit Insertion
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Solution Overview
Problem
Existing bicycle component operating devices face challenges in accommodating a large operating unit within a bracket without compromising the strength of the bracket structure.
Innovation Solution
The design incorporates a shift operating unit housed within the base member's interior space, with a removable access cover and secure attachment points that allow for the insertion of the shift operating unit without compromising the structural integrity of the bracket, utilizing a combination of pivot axes and biasing elements for operational functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a large operating unit is inserted into the bracket, then the functionality and size of the control mechanism is improved, but the strength of the bracket is reduced
Solution Approach 1:
The bracket is divided into multiple sections with strategic reinforcement zones. The interior space is segmented to accommodate the operating unit while maintaining structural integrity in critical load-bearing areas. This allows the bracket to house a larger operating unit without compromising overall strength.
Solution Approach 2:
Reinforcement features are applied locally at specific high-stress areas of the bracket rather than uniformly throughout the entire structure. This targeted approach strengthens the bracket where needed to support the larger operating unit while preserving material and weight efficiency in non-critical regions.
2Strength
If the bracket structure is reinforced to maintain strength, then the strength is improved, but the available interior space is reduced
Solution Approach 1:
The bracket structure is segmented into reinforcement zones and interior space zones. By strategically placing reinforcement features only where structurally necessary, the design maximizes the remaining interior space available for housing the operating unit, avoiding unnecessary material that would encroach on functional space.
Solution Approach 2:
Reinforcement is applied with local quality - concentrated precisely at high-stress areas rather than distributed uniformly. This ensures the bracket maintains required strength while minimizing the volume consumed by reinforcement features, thereby preserving maximum interior space for the operating unit.
Data Source
AI summary
A bicycle component operating device (12) is provided with a base member (27), an operating lever (31) and an operating unit (30). The base member includes an insertion opening (35) that is provided on one of a top surface (27c) and a bottom surface (27d) of the base member (27) to provide access to an interior space (33) within the base member (27). The operating lever (31) is pivotally mounted on the base member about a first pivot axis(P) extending transverse to the lateral surfaces. The operating unit (30) is disposed in the interior space (33) of the base member (27). The operating unit (30) has a dimension relative to the insertion opening (35) such that the operating unit (30) is insertable into the interior space (33) of the base member (27) through the insertion opening (35). The base member (27) is configured such that the insertion opening (35) continuously extends from the first pivot axis (P) toward the first end and the second end with respect to the first pivot axis.