Director chair

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Solution Overview

Problem

Existing director chairs lack adjustable armrests that can independently lateral-swing and adjust relative to the support frame, failing to meet the diverse needs of different users.

Innovation Solution

A director chair design featuring a chair frame with two support frames, a folding frame, and two armrest frames that can be hinged laterally, with a fixed assembly to control the armrest's position, including a locking assembly with a pressing key, gear sliding block, and elastic reset member for easy adjustment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the armrest frame is hinged to allow lateral swinging adjustment, then the adaptability for different users is improved, but the device complexity increases due to additional hinges and fixing mechanisms

Engineering Contradiction:

Improvearmrest adjustabilityVSAvoidhinge and fixing mechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The armrest frame is designed with a hinge connection to the support frame, enabling it to swing laterally between a horizontal extended position and a vertical folded position. This dynamic configuration allows the armrest to adapt between providing support and being stowed away, enhancing versatility without requiring multiple separate components.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The fixing assembly incorporates an elastic reset member that automatically returns the gear sliding block to its initial position after the pressing key is released. This self-service mechanism eliminates the need for additional actuators or manual repositioning, reducing overall device complexity while maintaining adjustability functionality.

Inventive Principle:

Principle #25Self-service

2Reliability

If a locking mechanism is added to fix the armrest frame in position, then the reliability of armrest positioning is improved, but the ease of operation deteriorates due to additional locking steps

Engineering Contradiction:

Improvearmrest positioning stabilityVSAvoidarmrest adjustment convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The locking function is segmented into distinct components: a pressing key for user activation, a gear sliding block for engagement, and an elastic reset member for automatic retraction. This segmentation allows each component to perform its specific function efficiently, maintaining ease of operation through simple key pressing while ensuring reliable positioning through the gear block's engagement mechanism.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The traditional multi-step locking mechanism is replaced with a simplified system where a single pressing action on the key triggers the gear sliding block to engage or disengage from the hinge pipe section. The elastic reset member automatically manages the disengagement phase, replacing what would otherwise require complex mechanical control systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If the armrest frame can be folded vertically against the support frame, then the portability is improved, but the manufacturing precision requirements increase to ensure proper folding alignment

Engineering Contradiction:

Improvefolding capabilityVSAvoidhinge alignment precision

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The armrest frame is designed with a hinge connection that enables dynamic folding movement. The hinge pipe section and second hinge pipe section are configured to rotate relative to each other, allowing the armrest to fold vertically against the support frame. This dynamic design accommodates normal manufacturing tolerances while achieving proper folding alignment through the rotational movement capability.

Inventive Principle:

Principle #15Dynamics

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

Enables adjustable armrest positions according to user needs with a simple and easy-to-operate mechanism, enhancing user comfort and flexibility.

Implementation Method 1

an elastic reset member arranged in the second hinge pipe section, wherein the elastic reset member applies elastic force to the gear sliding block

Methodology Applied

Scientific EffectElastic force: Elasticity

Data Source

PatentUS20260047681A1Director chair

Publication Date: 2026.02.19 ZHEJIANG SUNSHINE LEISURE PROD

AI summary

The present invention provides a director chair, including a chair frame and a chair surface, where the chair frame includes two support frames, a folding frame connected between the two support frames, and two armrest frames assembled on the two support frames, respectively; the armrest frame is hinged to the support frame, so as to be overturned in a lateral direction relative to the support frame; and a fixed assembly is arranged between the armrest frame and the support frame, and the fixed assembly fixes or releases the armrest frame and the support frame. A user can change a position of the armrest frame according to actual requirements, which has the characteristics of simple structure and easy operation.