Rotating Arm Rest for Saddle Riding Vehicle
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Solution Overview
Problem
Saddle riding type vehicles with arm rests face issues of increased load on the arm rest during mounting or dismounting when the arm rest is not pivoted upward, and the supporting bracket protrudes, making it difficult for passengers to easily mount or dismount.
Innovation Solution
The arm rest is designed to rotate between a use position with the front end directed towards the vehicle body front and a retracted position with the front end directed upwards, with a rotation shaft positioned in the vehicle body front upper direction, allowing it to retract smoothly when a load is applied, reducing the load on the arm rest and preventing the supporting bracket from protruding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the arm rest is arranged at the side rear position of the seat with the rotation shaft along the vehicle width direction, then the arm rest can be positioned to support the passenger's arm, but the bracket protrudes in the vehicle front direction requiring passengers to keep away during mounting or dismounting
Solution Approach 1:
The arm rest is designed to be rotatable around a rotation shaft that is directed to the vehicle body front upper direction, allowing it to dynamically change position between a use position (directed forward) and a retracted position (directed upward). This dynamic positioning eliminates the need for a long fixed bracket extension, as the arm rest can be rotated out of the way during mounting or dismounting operations
Solution Approach 2:
The rotation shaft is oriented in the vehicle body front upper direction rather than along the vehicle width direction. This changes the rotation dimension from horizontal to a diagonal/vertical plane, allowing the arm rest to retract upward and forward simultaneously, clearing the vehicle front direction space needed for passenger access
2Ease of operation
If the arm rest is allowed to pivot frontward to be substantially horizontal for use, then the arm rest can support the passenger's arm effectively, but when the passenger mounts or dismounts while forgetting to pivot the arm rest upward, the passenger contacts the arm rest and a large load acts on it
Solution Approach 1:
The arm rest is designed with rotational freedom around the front-upper directed shaft, allowing it to dynamically respond to external forces. When a passenger contacts the arm rest during mounting or dismounting, the arm rest can rotate around the shaft to accommodate the contact, converting the impact force into rotational motion rather than transmitting a large load to the mounting structure
Solution Approach 2:
The potential harmful impact of passenger contact with the arm rest during mounting is converted into a beneficial feature. The rotation shaft oriented in the front upper direction allows the arm rest to rotate away from the passenger's path of entry, transforming what would be a damaging impact into a smooth rotational disengagement that protects both the passenger and the arm rest structure
Data Source
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AI summary
A saddle riding type vehicle includes: a seat which is supported by a vehicle body and on which a passenger is seated; and an arm rest (17) which is provided to protrude at a side rear position of the seat of the vehicle body and on which an arm of a passenger who is seated on the seat is rested. The arm rest (17) is supported by the vehicle body rotatably between a use position at which a front end part of the arm rest (17) is directed to a vehicle body front direction and a retracted position at which the front end part of the arm rest (17) is directed to a direction other than the vehicle body front direction. A rotation shaft (19) of the arm rest (17) is arranged to be directed to a vehicle body front upper direction from the side rear position of the seat of the vehicle body.