Chair Frame with Modular Handle Assembly for Flexible Placement

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Solution Overview

Problem

Existing chairs with fixed handles lack flexibility and comfort, while chairs without handles inconvenience users, leading to resource wastage and limited usage, as users cannot easily assemble or customize the handle during chair assembly.

Innovation Solution

A chair design featuring a symmetrical frame with hollow assembly bars for handle insertion, rotatable handles, and a pivotal device allows for easy assembly and customization of handle placement on one or both sides, enabling users to assemble and maintain the chair conveniently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If handles are fixed to the chair frame during assembly, then the chair structure is stable and strong, but the chair lacks flexibility and user cannot customize handle placement

Engineering Contradiction:

Improvehandle placement flexibilityVSAvoidhandle fixedness

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The chair is divided into modular components: a chair frame with assembly bars, separate handles, and connection mechanisms. This segmentation allows the handle to be separated from the frame during assembly, enabling flexible placement while maintaining structural integrity when connected.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The connection between handle and frame transitions from static (fixed) to dynamic (adjustable during assembly). The assembly bar with hollow space and pivotal device allows the handle to be positioned dynamically at different locations before being secured, providing flexibility without compromising final stability.

Inventive Principle:

Principle #15Dynamics

2Productivity

If handles are pre-fixed during manufacturing, then production efficiency is high, but resource wastage occurs when multiple chair variants are needed

Engineering Contradiction:

Improveassembly efficiencyVSAvoidresource wastage

Core Design Contradiction:

ProductivityVSLoss of substance

Solution Approach 1:

The chair frame with standardized assembly bars serves multiple functions: it can accommodate handles at different positions (one-side or two-side configurations) using the same basic structure. This universality allows a single frame design to produce multiple chair variants without requiring separate tooling or causing material waste.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The handle configuration parameters (position, quantity) can be changed during assembly without altering the fundamental frame structure. Users can select to install handles at different locations or omit them entirely, allowing flexible customization from a single standardized frame design.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If handles are fixed during assembly, then manufacturing precision is maintained, but ease of operation for user assembly is reduced

Engineering Contradiction:

Improveuser assembly convenienceVSAvoidassembly accuracy

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The chair is designed to be easily assembled by the user without requiring specialized tools or expertise. The hollow space in the assembly bar and insertion mechanism allow users to intuitively connect handles to the frame, maintaining manufacturing precision through simple, foolproof assembly actions.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The assembly bar with hollow space acts as an intermediary component that simplifies the connection between handle and frame. This mediator structure guides the handle into the correct position and provides a clear assembly path, ensuring manufacturing precision is maintained while greatly improving ease of user assembly.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Adaptability or versatility

If multiple chair types (with/without handles) are manufactured, then user preference is accommodated, but production complexity and cost increase

Engineering Contradiction:

Improvechair configuration optionsVSAvoidproduction complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The chair frame is pre-configured with assembly bars and hollow spaces during manufacturing, preparing the structure to accommodate handles in various configurations. This preliminary preparation allows the same frame to support different handle arrangements (one-side, two-side, or no handles) without requiring separate production lines or complex tooling changes.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10441082B2Chair capable of installing a handle freely

Publication Date: 2019.10.15 SHIANG YE IND CO LTD

AI summary

A chair capable of installing a handle freely, comprising: a chair frame formed by two symmetrical sub-frame; each sub-frame including a supporting bar and an assembly bar bending from the supporting bar; one end of the assembly being formed with a hollow space for being inserted by a handle; a seat supported by the chair frame and installed between the two sub-frame. Each chair back has two sleeves at two sides thereof; each sleeve enclosing a respective one of the assembly bars; and a retainer for fixing the sleeve to the assembly bar of the frame. The chair further comprises at least one rotatable handle; for each chair frame, a shaft being inserted into a hollow space of the assembly bar of the frame; and a pivotal device is used to pivotally install the handle and the shaft, and a supporting plate is installed on the shaft.