Movable seat unit and movable seat
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Solution Overview
Problem
Existing movable seats with reclining positions require significant rearward movement of the backrest, necessitating excessive installation space and often feature complex structures and high manufacturing costs.
Innovation Solution
A movable seat unit with a pair of armrest side plates, a mechanical extension device, and an electric drive unit, where the seat frame slides along guide rails, and the backrest assembly pivots to reduce rearward movement, allowing for flexible operation and reduced space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the backrest moves significantly rearward in the reclining state to achieve a reclining position, then the reclining comfort is improved, but the spatial requirements for furniture arrangement increase
Solution Approach 1:
The backrest motion is transformed from primarily rearward movement to a downward-forward tilting motion. The guide chute member with guide chute and the backrest mounting member with guide pin create a constrained tilting path that changes the dimension of backrest movement, allowing reclining comfort to be achieved with minimal rearward displacement and reduced installation space requirements.
2Adaptability or versatility
If a mechanical extension device with complex structure is used to enable multi-position transformation, then the functionality is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The guide chute member and backrest mounting member are designed to perform multiple functions: the guide chute member provides both guiding and supporting functions, while the backrest mounting member simultaneously enables pivoting motion and maintains structural connection. This multi-functionality reduces the need for separate complex mechanical components, thereby simplifying the overall device structure while maintaining multi-position transformation capabilities.
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
The solution enables simpler structure, more flexible operation, and reduced installation space by allowing the backrest to move forward and downward, while maintaining a tilting motion, thus minimizing spatial demands.
Implementation Method 1
a guide pin configured to slidably engage with the guide chute
Data Source
AI summary
A movable seat unit, including armrest side plates supported on the ground; a mechanical extension device including a seat frame configured to attach a seat portion and a backrest assembly disposed at a rear portion of the seat frame and configured to attach a backrest, where guide rails extending in a front-rear direction of the seat unit are provided on the armrest side plates, and the seat frame is slidably engaged with the guide rails; the backrest assembly includes a backrest mounting member and a guide chute member fixedly mounted relative to the armrest side plates, a lower end of the backrest mounting member is pivotally connected to a rear portion of the seat frame, and a middle portion of the backrest mounting member is provided with a guide pin configured to slidably engage with the guide chute.