Handlebar-End Turn Signal Actuation Without Releasing Bicycle Grip
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Solution Overview
Problem
Existing bicycle turn signal devices require the cyclist to remove their hand from the handlebar grip to operate, compromising stability and visibility, especially in low-light conditions, and are not easily retrofittable without additional wiring.
Innovation Solution
A handlebar-end indicator device with an external actuation mechanism, such as a ring or ring segments, allows operation without removing the hand from the grip, featuring sensors and a control unit for reliable activation and deactivation, and optionally includes a radio module for synchronization and learning functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the operating unit is mounted on the inner side of the grips away from the handlebar ends, then the turn signal device can be positioned for retrofittting, but the cyclist must remove their hand from the handlebar grip to operate it
Solution Approach 1:
The operating unit is moved from the inner side of the grip (radial dimension) to the outer side of the grip (different radial position), allowing operation with the hand still on the handlebar while maintaining retrofitting capability. The actuating means are positioned on the outer side of the grip, enabling activation without hand removal.
2Ease of operation
If the operating unit is positioned directly adjacent to the grip, then operation convenience is improved, but other controls like brakes and gearshift prevent proper positioning
Solution Approach 1:
The operating unit is segmented into separate actuating means that can be positioned independently on the outer side of the grip, away from other controls. This segmentation allows the operating unit to be positioned optimally for hand operation without interfering with brake or gearshift controls.
3Ease of operation
If the actuating means are positioned on the outer side of the housing, then operation without hand removal is enabled, but the device becomes more complex
Solution Approach 1:
The actuating means are designed to be activated directly by the cyclist's hand on the handlebar, eliminating the need for additional actuators or complex mechanisms. The simple actuating means can be directly engaged by the rider's finger or palm while maintaining grip.
Data Source
Figure 1~3
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Figure 6~7
AI summary
The invention relates to a direction indicator device for bicycles in the form of a handlebar end indicator, comprising a housing (1), a light unit (3), an operating unit (8), and a control unit (7). The operating unit (8) is formed by means (9) for actuation, which are arranged on the outside of the housing (1).