Inclined Deck Floor for Personal Watercraft Monitoring Stability
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Solution Overview
Problem
Existing personal watercraft designs complicate the seating structure for a monitoring person who needs to see the rearward side, making it difficult to maintain stability during acceleration, deceleration, or operation, especially during water sports like wakeboarding.
Innovation Solution
A personal watercraft design featuring a deck with inclined parts on the deck floor that support the feet of the monitoring person seated behind the center, allowing them to maintain a stable posture while viewing the rearward side, with a simple structure that includes a rear grip and inclined deck floor sections that increase in width from front to rear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a structure is provided at the seat to allow the monitoring person to be stably seated according to acceleration or deceleration, then the monitoring person can maintain stable posture, but the structure becomes complicated
Solution Approach 1:
The patent applies dimensionality change by creating an inclined surface on the deck floor rather than modifying the vertical seat structure. The inclined part extends in the forward-rearward direction, adding a dimensional element that provides stability through gravitational force component along the incline, thereby avoiding complex mechanical adjustments while achieving stable seating during acceleration and deceleration
Solution Approach 2:
The inclined deck floor structure enables the monitoring person to maintain stable posture through gravitational force alone, without requiring additional mechanical stabilization mechanisms. The self-service principle is embodied in how the inclined surface automatically provides stabilizing force to the monitoring person's feet during acceleration and deceleration phases, eliminating the need for complex active control systems
2Ease of operation
If the monitoring person is seated on the rear portion of the seat to see the rearward side, then the monitoring person can observe the player during water sports, but the monitoring person's feet cannot be firmly supported
Solution Approach 1:
The patent resolves this contradiction by introducing an inclined surface dimension on the deck floor at the rear portion where the monitoring person sits. This inclined part extends forward-sloping toward the rear, providing a natural footrest that supports the monitoring person's feet firmly while allowing them to sit at the rear of the seat with unobstructed rearward viewing capability
Solution Approach 2:
The inclined part is localized specifically at the rear portion of the deck floor where the monitoring person's feet would naturally rest. This local quality change provides targeted support exactly where needed - at the rear seating area - without affecting the overall seat structure or viewing angles, thereby simultaneously achieving stability and ease of operation
Data Source
AI summary
A personal watercraft comprises a body including a deck; and a seat disposed on the deck at a location that is forward of a rear end of the deck, wherein the deck includes a deck floor extending in a forward and rearward direction and in a rightward and leftward direction, at a location that is lateral of the seat, and wherein when viewed from a side, inclined parts which are inclined in an upward direction from a front to a rear, are provided in regions of the deck floor, the regions vertically overlapping with a portion of the seat, the portion being rearward of a center of the seat in the forward and rearward direction.