Detachable Snap-Fit Frame for Electric Lifting Desk

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Solution Overview

Problem

Existing electric lifting desks have large packaging and transportation costs due to complex welding processes and large frame sizes, and require complex welding fixtures, leading to high production costs and low efficiency.

Innovation Solution

A detachable connection structure for an assembled frame using snap-fit and undercut portions in cross beams, with locking inserts and sliding pieces, allowing tool-free assembly and disassembly, reducing welding and improving telescoping range.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If welding process is used to connect cross beams and connecting members, then joint strength is improved, but manufacturing complexity and cost increase

Engineering Contradiction:

Improvejoint strengthVSAvoidmanufacturing complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The frame structure is divided into separate modular components (cross beams and connecting members) that can be assembled independently. The connecting members with snap-fit portions can be attached to cross beams without welding, allowing for simplified manufacturing while maintaining structural integrity through the snap-fit connection mechanism.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The welding process is replaced with a mechanical snap-fit connection system. The undercut portions and retaining grooves create a mechanical interlock that substitutes for the metallurgical bond of welding, eliminating the need for complex welding fixtures and processes while maintaining joint strength.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If welding fixtures and gauges are used to ensure precision, then manufacturing precision is improved, but production efficiency decreases

Engineering Contradiction:

Improveframe assembly precisionVSAvoidproduction efficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The connecting members are pre-formed with specific snap-fit portions and undercut geometries that inherently guide their alignment with the cross beams. This preliminary precision in component manufacturing eliminates the need for complex assembly fixtures during final assembly, as the parts self-align through their geometric features.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The snap-fit connection mechanism is designed to self-align and self-lock the connecting members to the cross beams. The undercut portions automatically engage with the retaining grooves when brought together, providing self-positioning that eliminates the need for external positioning fixtures and gauges.

Inventive Principle:

Principle #25Self-service

3Strength

If frame components are welded together, then structural strength is improved, but packaging volume increases

Engineering Contradiction:

Improveframe structural strengthVSAvoidpackaging volume

Core Design Contradiction:

StrengthVSVolume of moving object

Solution Approach 1:

The frame is segmented into separate components (cross beams and connecting members) that can be packaged independently in a compact arrangement. This modular segmentation allows for more efficient space utilization in packaging compared to shipping pre-assembled welded frames, reducing overall packaging volume while maintaining structural strength through the snap-fit connections.

Inventive Principle:

Principle #1Segmentation

4Reliability

If complex welding processes are used, then joint reliability is improved, but ease of manufacture decreases

Engineering Contradiction:

Improvejoint reliabilityVSAvoidease of assembly

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The welding process is replaced with a mechanical snap-fit assembly system that is simpler to implement. The connecting members with snap-fit portions can be attached to cross beams through straightforward mechanical insertion and locking, eliminating the need for skilled welders, welding equipment, and complex manufacturing procedures while maintaining reliable joints.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP4644709A1Detachable connection structure of assembled frame, and height-adjustable platform

Publication Date: 2025.11.05 CHANGZHOU KAIDI ELECTRICAL INC

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AI summary

The present disclosure relates to the technical field of electric lifting desks, and in particular, to a detachable connection structure for an assembled frame, which is used to connect a lifting column and a desk top. The frame includes a cross beam assembly. The cross beam assembly includes two cross beams arranged in parallel, a first connecting member snapped in the middle of the two cross beams, and a second connecting member snapped at the ends of the two cross beams. The first connecting member and the second connecting member are respectively provided with a snap-fit portion and an undercut portion adapted to the cross beams. The cross beams are provided with retaining grooves adapted to the undercut portions. The snap-fit portions are snapped onto the cross beams, and the undercut portions are snapped into the retaining grooves, so as to detachably fix the first connecting member, the second connecting member, and the two cross beams together. The detachable connection structure for the assembled frame disclosed in the present disclosure is detachable as a whole and simple to assemble. The assembly of the desk frame can be completed without tools, which reduces the manufacturing difficulty and cost, reduces the defects caused by welding deformation, and improves the product quality.