Wheelchair Height Adjustment Mechanism with Sliding Pole
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Solution Overview
Problem
Conventional wheelchairs lack an efficient mechanism for adjusting the height of the seat relative to the grounding frame, requiring separate adjustments for the front and rear wheels, which is time-consuming and labor-intensive.
Innovation Solution
A height adjustment mechanism comprising an adjustment pole and a pole reception, allowing the body frame to slide vertically relative to the grounding frame, with a fixing mechanism to secure the adjustment pole, enabling easy adjustment of the seat height without altering the position of the wheels or brakes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional wheelchairs use separate adjustments for front and rear wheels to change seat height, then the seat height can be adjusted, but the adjustment process becomes time-consuming and labor-intensive
Solution Approach 1:
The patent combines the adjustment mechanisms for front and rear wheels into a single integrated height adjustment mechanism. The adjustment pole with multiple hole positions allows simultaneous adjustment of both wheel heights by moving the body frame relative to the grounding frame, eliminating the need for separate adjustments and reducing time and effort required.
Solution Approach 2:
The patent introduces a dynamic height adjustment mechanism where the body frame can slide vertically along the adjustment pole. This dynamic structure allows the seat height to be easily changed by moving the body frame to different hole positions on the adjustment pole, making the adjustment process flexible and efficient.
2Stability of the object's composition
If the wheelchair frame is designed as a single integrated structure, then structural integrity is maintained, but replacement or modification of the grounding frame affects wheel positions
Solution Approach 1:
The patent divides the wheelchair frame into two separate components: a grounding frame and a body frame. The body frame is mounted on the grounding frame through the height adjustment mechanism, allowing the body frame to be replaced or modified independently without affecting the grounding frame or wheel positions. This segmentation provides flexibility while maintaining overall structural integrity.
Solution Approach 2:
The grounding frame is designed as a universal base that can accommodate different body frames through the standardized height adjustment mechanism. The adjustment pole with multiple hole positions serves multiple functions: providing structural support, enabling height adjustment, and allowing easy attachment/detachment of the body frame, thus supporting both structural integrity and adaptability.
3Adaptability or versatility
If the wheelchair lacks a height adjustment mechanism, then the structure remains simple, but the seat height cannot be adjusted to suit different users
Solution Approach 1:
The patent introduces a dynamic height adjustment mechanism with minimal added complexity. The adjustment pole with hole positions and the slidable body frame create a simple yet effective system that provides adjustable seat height. The mechanism adds only essential components needed for height adjustment without over-complicating the overall frame structure.
Solution Approach 2:
The patent enables height adjustment by changing the vertical position parameter of the body frame relative to the grounding frame. The adjustment pole provides discrete height positions through hole placements, allowing the seat height to be modified to suit different users while keeping the structural design relatively simple and straightforward.
Data Source
AI summary
A front wheel and a rear wheel are to be provided at a grounding frame. A body frame is mounted on the grounding frame and includes a mount at which a seat is to be provided. A relative position between the grounding frame and the body frame in a height direction of a wheelchair is changed via a height adjustment mechanism. The height adjustment mechanism includes an adjustment pole, a pole reception, and a holding portion. The adjustment pole extends along the height direction and is mounted on one of the body frame and the grounding frame. The pole reception is mounted on another of the body frame and the grounding frame and is engaged with the adjustment pole slidably in the height direction. The holding portion is to hold not to relatively move the adjustment pole with respect to the pole reception.