Tiltable Armrest Assembly With Gap-Covered Sliding Support
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Solution Overview
Problem
In existing chair designs, the integral armrest assembly causes user discomfort when the backrest tilts, as the armrest's angle and position do not adjust correspondingly, leading to misalignment and potential injury from gaps between components during tilting.
Innovation Solution
A tiltable and slidable armrest assembly with a safety cover that links only during tilting, featuring a tilting arm pad that adjusts its angle and position in the front-rear direction, and a safety cover that covers gaps between components, preventing user injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the armrest assembly is integrally assembled to the seat plate part, then the structure is simple and stable, but the user experiences discomfort when the backrest tilts because the armrest angle does not adjust correspondingly
Solution Approach 1:
The armrest assembly is divided into separate functional components: the fixing bracket part attached to the seat plate, the lifting part for height adjustment, and the tilting arm pad part that can independently tilt and slide. This segmentation allows each component to perform its specific function while maintaining overall structural stability.
Solution Approach 2:
The tilting arm pad part is designed to dynamically adjust its position and angle in response to backrest tilting. It can slide in the front-rear direction and tilt to maintain the correct angle relative to the user's arm, ensuring comfort during dynamic use while the fixed fixing bracket maintains structural stability.
2Ease of manufacture
If the armrest assembly is fixed to the seat plate part, then manufacturing and assembly are simple, but the distance between the armrest and backrest changes when tilting, causing user discomfort or injury
Solution Approach 1:
The armrest assembly separates the fixed fixing bracket part from the movable tilting arm pad part through the lifting part mechanism. This allows simple attachment of the bracket to the seat plate while enabling complex adjustments of the arm pad position and angle to maintain safety and comfort during tilting.
Solution Approach 2:
The tilting arm pad part dynamically adjusts its position in the front-rear direction and its tilting angle to compensate for backrest tilting movements. This dynamic adjustment ensures the armrest maintains proper distance and angle relative to the user's arm, preventing gaps that could cause injury while keeping the overall assembly simple.
3Ease of operation
If the tilting arm pad part tilts and slides, then user comfort is improved, but gaps may occur between components that could cause user injury
Solution Approach 1:
The tilting arm pad part is designed with coordinated tilting and sliding movements that maintain continuous contact between components. The dynamic adjustment mechanism ensures that as the arm pad tilts and slides to match backrest angles, gaps between components are minimized or eliminated, preventing user injury while maintaining comfort.
Data Source
AI summary
An armrest assembly includes: a fixation bracket part which is fixed to both of left and right ends of a seat plate part and has an inner space having an open upper side; a lifting part provided at the upper part of the fixation bracket part to be movable in an upward/downward direction; a tilting arm pad part provided at the upper end of the lifting part to be tiltable and slidable in a forward/backward direction; and a safety cover part which inter-operates when the tilting arm pad part is tilted and does not inter-operate when the tilting arm pad is slid, and covers a part between the lifting part and the tilting arm pad part. The tilting arm pad part has a sliding guide slot formed therein to enable a sliding movement thereof in the forward/backward direction with respect to the safety cover part.