Seat-Backrest Linkage with Swing Bracket for Adaptive Posture Support
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Solution Overview
Problem
Existing seat-backrest linkage devices for ergonomic chairs cannot adapt to a user's left or right sitting posture, leading to prolonged pressure on the spine and discomfort.
Innovation Solution
A seat-backrest linkage device with a swing bracket hinged to the base, allowing the support plate seat to tilt and swing left and right relative to the base, thereby adapting to the user's weight and posture changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the chair seat is fixed in position, then the structure is simple, but it causes prolonged pressure on the spine and discomfort when sitting for a long time
Solution Approach 1:
The patent introduces dynamic movement capabilities to the chair seat through the swing bracket mechanism. The hinge connection allows automatic swinging motion that responds to user body tilt, creating dynamic posture adjustment without requiring complex active control systems, thus reducing spine pressure while maintaining reasonable structural complexity.
Solution Approach 2:
The swing bracket mechanism is designed to automatically respond to user body movements without requiring external control. When the user tilts their body to the left or right, the swing bracket naturally swings in the corresponding direction due to the hinge connection, providing self-service posture adjustment that relieves spine pressure without adding complex control systems.
2Adaptability or versatility
If a swing bracket hinged to the base is added to allow left/right swinging, then the chair seat can adapt to user posture changes, but the device complexity increases
Solution Approach 1:
The patent merges the swing bracket mechanism with the existing crank linkage system. The swing bracket is integrated into the overall linkage structure, sharing common components such as the hinge connections and structural members with the raising/lowering mechanism. This merging approach adds posture adaptability while minimizing the increase in device complexity through shared structural elements.
Data Source
AI summary
A seat-backrest linkage device includes a base, a bracket plate, a swing bracket and a connecting member. The connecting member includes a crank and a connecting plate connected as a whole. The swing bracket is provided between the base and the bracket plate. Two ends of the crank are respectively hinged to the bracket plate and the swing bracket. An slide groove guide mechanism is provided between the bracket plate and the swing bracket. The swing bracket and the base are hinged in middles, such that the swing bracket, the connecting member, and the bracket plate are capable of together tilting and swinging left and right relative to the base. The support plate seat can be raised and lowered relative to the base, and the swing bracket hinged to the base is arranged between the base and the support plate seat.