Motorcycle Handlebar Switch Assembly Zone Redesign
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Solution Overview
Problem
Existing handlebar switch assemblies for motorcycles require significant finger movement to operate shift-up and shift-down switches, with the shift-up switch being difficult to access with the forefinger and the shift-down switch being hard to operate with the thumb due to improper placement on the switch case.
Innovation Solution
The handlebar switch assembly is redesigned with the shift-up and shift-down switches positioned in specific zones on the switch case to minimize finger movement, where the shift-up switch is located in the front lower zone and the shift-down switch in the rear lower zone, both with swing-type mechanisms oriented to facilitate operation by the thumb and forefinger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shift-up switch is located at the same level as the handlebar's axis line, then the switch can be positioned on the switch case, but the forefinger must move a considerable extent to operate it
Solution Approach 1:
The shift-up switch is repositioned from the traditional horizontal arrangement (at handlebar axis line level) to a vertical arrangement in the lower zone of the switch case. This dimensional change allows the switch to be accessed by natural thumb movement while maintaining electrical functionality, thereby reducing forefinger movement distance and improving operability.
2Ease of operation
If the shift-down switch protrudes below the switch case to be closer to the thumb, then the switch is easier to operate, but the pushing surface becomes too remote from the thumb
Solution Approach 1:
The shift-down switch is repositioned from protruding below the switch case (vertical protrusion) to being integrated within the lower zone of the switch case (horizontal arrangement). This dimensional reconfiguration places the pushing surface at an optimal distance from the thumb, enabling easy operation without excessive reach.
3Adaptability or versatility
If separate shift-up and shift-down switches are provided on the switch case, then gear shift control is achieved, but the switches are difficult to operate without extensive finger movement
Solution Approach 1:
The gear shift control function is segmented into two separate switches (shift-up and shift-down), each positioned in distinct lower zones of the switch case. This segmentation allows each switch to be optimized for specific finger operation (thumb for shift-down, forefinger for shift-up) while maintaining overall gear shift control capability, thereby reducing the finger movement required for each individual switch.
Data Source
AI summary
A handlebar switch assembly for enhancing operability of a shift-up switch and a shift-down switch separately provided on a switch case. Viewing a switch case from an axis line direction of a handlebar, four zones are defined with the axis line, a rear upper zone and a rear lower zone, both located opposite to an occupant, and a front upper zone and a front lower zone, both located on the vehicle front side. A first shift switch and a second shift switch are swing-type switches in which operating elements swing when a pushing force is applied. The shift-up switch is located in the front lower zone so as to orient one end of its operating element outward in the vehicle transverse direction and the shift-down switch is located in the rear lower zone so as to orient one end of its operating element outward in the vehicle transverse direction.