Office Chair Support Base Layout for Stable Arm Attachment
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Solution Overview
Problem
Conventional office chairs with swivel mechanisms face issues of arm overhang and instability due to the size and shape of the support base, leading to interference with the seat and reduced operational efficiency.
Innovation Solution
A chair design featuring a support mechanism with a flexible configuration, including a leg, leg support pole, and a support base with separate left-right and front-rear support parts, allowing for adjustable arm attachment without overhanging, ensuring stability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support base is enlarged to provide stable arm attachment, then the arm attachment stability is improved, but the arm overhangs widely beyond the seat and interferes with the seat operation
Solution Approach 1:
The support base is divided into a main body portion and a projection portion. The projection portion extends from the main body to provide a dedicated arm attachment location that is positioned laterally outward, allowing the arm to be attached without requiring the entire support base to be enlarged. This segmentation enables stable arm attachment while preventing excessive overhang.
Solution Approach 2:
The arm attachment position is achieved by extending the support base laterally in the width direction through the projection portion, rather than enlarging the support base in the front-rear direction. This dimensional change allows the arm to be attached at an optimal position that provides stability without interfering with the seat's front-rear movement range.
2Length of moving object
If the support base is compact to avoid interference with the seat, then the arm overhang is reduced, but the arm attachment stability and strength are compromised
Solution Approach 1:
The support base is segmented into a compact main body and a laterally extending projection. The projection portion is specifically designed to provide a stable attachment location for the arm, concentrating the structural strength where needed while keeping the overall support base compact and non-interfering with the seat.
Solution Approach 2:
The projection portion of the support base is designed with enhanced local structural properties to provide strong arm attachment. This localized quality enhancement ensures adequate arm attachment strength without requiring the entire support base to be enlarged, thus avoiding interference with the seat.
3Ease of manufacture
If the support base is designed with fixed geometry to simplify manufacturing, then the manufacturing complexity is reduced, but the adaptability to different arm attachment requirements is limited
Solution Approach 1:
The support base is designed with a modular segmented structure consisting of a main body and a projection portion. This segmentation provides different attachment surfaces and geometries that can accommodate various arm attachment requirements while maintaining a relatively simple manufacturing process for each segment.
Solution Approach 2:
The projection portion of the support base serves multiple functions: it provides lateral extension for arm attachment, maintains structural strength, and prevents interference with the seat. This multi-functional design enhances adaptability to different arm attachment requirements while keeping the overall structure manufacturable.
Data Source
AI summary
A chair according to the present invention is a chair comprising a leg 1 arranged on a floor surface, a leg support pole 13 erected from the leg 1, a support base 4 fixed at an upper end of the leg support pole 13, a seat 2 arranged above the support base 4 and a support mechanism 5 interposed between the support base 4 and the seat 2 and configured to support the seat 2 movably in a front-rear direction and a left-right direction. Additionally, in the support mechanism 5, a left-right support part 51 is attached to the support base 4 movably in a left-right direction, a front-rear part 52 is attached to the left-right support part 51 movably in a front-rear direction, the seat 2 is attached to the front-rear support part 51, and the support base 4 has an arm attachment part 6.