Pivotable Leg Mechanism for Compact Wheelchair Storage
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Solution Overview
Problem
Conventional mobile objects, such as electric wheelchairs, face challenges in convenience and appearance due to the seating part occupying a large area in the folded state, making them inefficient and difficult to operate, and the exposed changing mechanism giving a complicated impression.
Innovation Solution
A mobile object design featuring a moving base with pivotable leg parts and a frame that covers the seating and frame attaching regions, allowing the wheel base to expand and contract, enabling efficient use in both states and improving operability while hiding the changing mechanism for a better appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the seating part is designed to allow stable seating, then the user can be stably seated on the seat, but the seating part occupies a large area in the folded state making the mobile object difficult to operate and reducing convenience
Solution Approach 1:
The seat is designed with dynamic positioning capability through the leg part that can pivot relative to the frame. In the unfolded state, the seat provides stable seating support. In the folded state, the seat automatically repositions to a higher location, clearing the operational space. This dynamic adjustment resolves the contradiction between seating stability and ease of operation in folded state.
2Device complexity
If a single handle is used for operating the mobile object in both unfolded and folded states, then the structure is simplified, but the operation of the mobile object in the folded state becomes difficult reducing convenience
Solution Approach 1:
The mobile object incorporates a dynamic handle mechanism that automatically adjusts its position based on the vehicle state. In the unfolded state, the handle is positioned for standard operation. In the folded state, the handle automatically moves to a more accessible position, maintaining ease of operation without requiring additional handles or complex control systems.
3Device complexity
If the changing mechanism is exposed to the outside, then the structure is straightforward, but it gives a complicated impression on the user reducing appearance quality
Solution Approach 1:
The changing mechanism is nested within the frame structure of the mobile object. The mechanism components are integrated into the existing frame members, allowing the mechanism to function while remaining visually concealed. This nesting approach maintains the straightforward mechanical structure while presenting a clean, unified appearance without exposed mechanical elements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances convenience by allowing efficient use in the folded state and improves the appearance by hiding the changing mechanism, making the mobile object more user-friendly and aesthetically pleasing.
Implementation Method 1
the leg part includes a seating part attaching region to be attached to the seating part, a base attaching region to be attached to the front base so as to make the leg part pivotable with respect to the front base, a frame attaching region to be attached to the frame so as to make the leg part pivotable with respect to the frame
Data Source
AI summary
A mobile object according to the invention includes: a moving base including a front base and a rear base; a seat including a seating part and a leg part configured so as to support the seating part; and a frame disposed on the rear base, in which the leg part includes: the seating part attaching region to be attached to the seating part, the base attaching region to be attached to the front base so as to be pivotable, and a frame attaching region to be attached to the frame so as to be pivotable, the front and rear bases are movable relative to each other such that the moving base can change between the expanded state and the contracted state of the wheelbase, the pivotal movement of the leg part is interlocked with the relative movement between the front and rear bases, the frame is configured so as to cover the seating part attaching region and the frame attaching region from an outside of the mobile object in the width direction when the moving base is in the expanded state, and cover the base attaching region and the frame attaching region of the leg part from an outside of the mobile object in the width direction when the moving base is in the contracted state.