Motorcycle Storage Box Projection for Seat Width Reduction
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Solution Overview
Problem
Existing two-wheeled motor vehicles face challenges in increasing storage box capacity without widening the seat, and in preventing visibility and intrusion of foreign matters through the space between the storage box and its cover.
Innovation Solution
A two-wheeled motor vehicle design featuring a storage box with a projection below its upper edge, positioned to overlap the cover, allowing the storage box to be positioned closer to the seat and reducing seat width, while the projection prevents visibility of underlying components and foreign matter intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flange spreading outward is formed on the upper edge of the storage box to prevent foreign matter intrusion, then reliability is improved, but the seat width must be widened to accommodate the flange, increasing the area occupied by the vehicle components
Solution Approach 1:
The invention moves the protective projection from the horizontal plane (flange spreading outward) to a vertical arrangement (projection on the lateral surface at a lower position). This dimensional change allows the projection to overlap the cover in plan view without requiring horizontal space, thus preventing foreign matter intrusion while maintaining compact seat width.
Solution Approach 2:
Instead of placing the protective element at the upper edge of the storage box (conventional approach), the invention places it at a lower position on the lateral surface. This inverted positioning allows the projection to serve its protective function while overlapping the cover, eliminating the need for a spreading flange.
2Volume of moving object
If the lateral wall of the storage box is positioned outward to increase storage capacity, then volume of the storage box is improved, but the seat width must be widened to maintain adequate space between the storage box and seat
Solution Approach 1:
The protective function is achieved in the vertical dimension through the projection on the lateral surface, rather than in the horizontal dimension through a spreading flange. This allows the storage box to be positioned more outward (increasing capacity) without requiring additional horizontal clearance between the storage box and seat.
3Device complexity
If no flange is formed on the upper edge of the storage box to reduce structural complexity, then device complexity is reduced, but members placed below may be seen through the space between the storage box and cover, and foreign matters may be introduced
Solution Approach 1:
The invention extracts the protective function from the upper edge flange structure and relocates it to a projection on the lateral surface. This separation allows the upper edge to remain simple (no spreading flange) while the lower projection provides the necessary protection against foreign matter intrusion and visibility shielding.
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
To provide a two-wheeled motor vehicle having an increased capacity of a storage box while reducing increase of the seat width, and having a member mounted below be hardly seen through the space between the storage box and the cover, and preventing introduction of foreign matters and a hand through the space. In a two-wheeled motor vehicle according to the present invention, a lateral part (72) of the seat (7) is bent downward being opposed to the lateral surface (23) of the storage box (2) so as to go farther away from the lateral surface (23) of the storage box (2) as it goes downward. In a side view, the upper edge (37) of the cover (30) is positioned higher than the lower edge (721) of the lateral part (72) of the seat (7) lower than the upper edge (22) of the storage box (20). The lateral surface (23) of the storage box (20) has a projection (21) formed at a position lower than the upper edge (22) and overlapping, in a plan view, the upper edge (37) of the cover (30). A part of the lateral surface (23) above the projection (21) is formed as a flat surface up to the upper edge (22) of the storage box (20).