Adjustable Bicycle Handlebar Switch Layout for Different Hand Sizes
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Solution Overview
Problem
Existing bicycle electric control devices lack adjustability to accommodate riders with varying hand sizes, making it difficult to position user interface switches effectively for comfortable and efficient operation.
Innovation Solution
The bicycle electric control device features rotatably and slidably adjustable user interface members, utilizing spherical recesses and protrusions, along with threaded fasteners and elongated bores, to allow for precise positioning of the user interface members relative to the base member, ensuring optimal placement and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electric user interface members are mounted fixedly on the handlebar, then the device structure is simple, but it cannot accommodate different hand sizes and provides poor adaptability
Solution Approach 1:
The patent implements adjustability mechanisms that allow the user interface members to be dynamically repositioned. The first and second electric user interface members can be adjusted relative to the base member along predetermined paths, enabling the device to adapt to different hand sizes and rider preferences while maintaining a relatively simple overall structure through guided motion constraints.
Solution Approach 2:
The base member serves multiple functions: it provides mounting for the user interface members, enables adjustment mechanisms, and allows rotation of the entire assembly on the handlebar. This multi-functionality increases adaptability without proportionally increasing device complexity, as the same structural elements perform multiple roles.
2Adaptability or versatility
If user interface members are made adjustable, then adaptability to different hand sizes is improved, but the device structure becomes more complex
Solution Approach 1:
The patent divides the adjustment functionality into separate, modular components. Each electric user interface member has its own adjustment mechanism independent of the others, allowing individual positioning without affecting the entire device. This segmentation enables adjustability while keeping each individual adjustment mechanism relatively simple.
Solution Approach 2:
The patent employs spherical recesses and protrusions to enable rotatable adjustment of the user interface members. The spherical geometry allows rotation in multiple directions while maintaining a compact adjustment mechanism, reducing overall complexity compared to linear or multi-axis adjustment systems.
3Adaptability or versatility
If spherical recesses and protrusions are used for adjustment, then rotatable positioning is enabled, but manufacturing precision requirements increase
Solution Approach 1:
The spherical adjustment mechanism is designed to work with controlled looseness rather than tight precision. The spherical protrusion fits within the spherical recess with intentional clearance, allowing easy manual adjustment without requiring high-precision machining. The adjustment is secured through friction or detent mechanisms rather than precision fits.
Solution Approach 2:
The patent uses threaded fasteners to secure the spherical protrusions in place after adjustment. This allows the spherical geometry to provide rotational freedom during adjustment while the threading mechanism provides precise securing, separating the adjustment function from the securing function and reducing overall manufacturing precision requirements.
Data Source
AI summary
An electric control device for a bicycle that includes a base member mountable to a bicycle handlebar, a first electric user interface member operatively coupled to the base member, and a second electric user interface member operatively coupled to the base member. The first electric user interface member and the second electric user interface member are adjustable relative to one another.