Integrated Brake Lever and Electrical Shift Switch
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Solution Overview
Problem
Existing bicycle shift control systems require inconvenient hand movements to operate both the brakes and shifting mechanisms, leading to inefficiencies in operation, particularly when using electric switches on the handlebar.
Innovation Solution
A bicycle operating component with an electrical shift control switch that includes a mounting portion and an operating member, allowing for movement in a single actuating direction to initiate both up and down shifts, with a controller determining the shift direction based on signal duration, integrated with the brake lever to streamline operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple electric switches are provided at different handlebar locations to enable quicker shifts, then shift responsiveness is improved, but device complexity and ease of operation deteriorate due to the need to move hands around the handlebar to operate both brakes and shifts
Solution Approach 1:
The patent combines the brake lever and electrical shift control switch into a single integrated operating component. The operating member is mounted on the brake lever bracket, allowing the rider to control both braking and gear shifting from one location on the handlebar, eliminating the need to move hands between separate controls while maintaining quick shift responsiveness
Solution Approach 2:
The operating member serves multiple functions: it can be actuated in a first direction to initiate up-shifting, in a second direction to initiate down-shifting, and the brake lever itself remains functional for braking. This multi-functionality is achieved within a single integrated component structure
2Device complexity
If a single operating member is used to control both up and down shifts, then device complexity is reduced, but measurement precision deteriorates in determining shift direction
Solution Approach 1:
The system uses dynamic characteristics (time-based response) to differentiate between up and down shift commands. The controller measures the duration of the electrical signal from the operating member: signals within a first time period trigger up-shifting, while signals exceeding this period trigger down-shifting. This temporal differentiation allows precise direction determination without requiring separate physical switches
Solution Approach 2:
The controller receives electrical signals from the operating member and uses feedback based on signal duration to determine the intended shift direction. This feedback mechanism allows the system to accurately interpret the rider's intent from a single operating member through intelligent signal processing
Data Source
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AI summary
A bicycle operating component includes an electrical shift control switch (36). The electrical shift control switch (36) includes a mounting portion (60) and an operating member (61). The operating member (61) is movably coupled to the mounting portion (60). The operating member (61) is arranged to move relative to the mounting portion (60) in an actuating direction from an original position. The electrical shift control switch (36) is configured to operate a bicycle shift mechanism in a first direction when the operating member (61) is moved from the original position in the actuating direction and also to operate the bicycle shift mechanism in a second direction when the operating member (61) is moved from the original position in the actuating direction. Preferably, a controller (24) is operatively coupled to the electrical shift control switch (36) in order to actuate the bicycle shift mechanism depending on the stroke of the operating member (61) or the amount of time moved in the actuating direction.