Silent elevation structure for desk frame

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Solution Overview

Problem

Conventional desk frames with adjustable height generate significant noise and shock during vertical movement due to rapid elevation and excessive downward force, affecting stability and operational quality.

Innovation Solution

A silent elevation structure comprising a base unit, elevation unit with telescopic tubes, a movement control unit with a telescopic rod and control board, and a shock absorbing unit with upper and lower buffer pads to absorb impacts and reduce noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the pneumatic rod continuously extends to elevate the desk board, then the desk board reaches the desired height, but large impact noise is generated when the stop block abuts against the upper stop edge

Engineering Contradiction:

Improveelevation speed of desk boardVSAvoidimpact noise from stop block

Core Design Contradiction:

SpeedVSObject-generated harmful factors

Solution Approach 1:

A buffer pad is provided at the upper end of the outer tube to cushion the impact between the stop block and the upper stop edge. The buffer pad absorbs the shock when the desk board reaches its maximum height, preventing direct contact and noise generation between the hard surfaces of the stop block and stop edge.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The buffer pad acts as an intermediary element between the stop block and the upper stop edge. Instead of allowing direct impact between these two components, the buffer pad mediates the interaction by deforming under compression to absorb impact energy, thereby eliminating the harmful noise.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If excessive downward force is applied to the control device, then the desk board descends rapidly, but larger impact noise is generated at the bottom end of the inner tube and bottom plate

Engineering Contradiction:

Improvecontrol responsivenessVSAvoidimpact noise at bottom end

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

A buffer pad is provided at the bottom end of the inner tube to cushion the impact when the desk board descends. The buffer pad absorbs the shock from excessive downward force, preventing direct impact noise between the inner tube bottom end and the bottom plate.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The buffer pad serves as an intermediary between the inner tube and the bottom plate, absorbing excessive downward forces and preventing direct harmful impacts. This intermediary element protects the system from noise and potential damage while maintaining operational control.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the telescopic rod extends rapidly to adjust height, then the elevation response is fast, but the stability of vertical movement is reduced

Engineering Contradiction:

Improveheight adjustment speedVSAvoidvertical movement stability

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The buffer pad is positioned in advance at the extreme positions to cushion rapid movements. When the telescopic rod extends or retracts quickly, the buffer pad absorbs the resulting shocks, maintaining stability during the elevation process while preserving fast response capability.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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

The solution effectively reduces impact noise and improves stability by absorbing shocks and controlling the telescopic rod's extension, ensuring smooth and quiet vertical movement of the desk board.

Implementation Method 1

The upper buffer pad is disposed below the first top plate of the outer tube... The lower buffer pad is disposed above the bottom plate of the outer tube

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS11497304B1Silent elevation structure for desk frame

Publication Date: 2022.11.15 PAN DOUGLAS

AI summary

An elevation structure for a desk frame includes an inner tube telescopically received in an outer tube fixed to a base. The outer tube includes a bottom plate and a first top plate. A desk board unit is fixed to the inner tube. A telescopic rod is received in the inner tube and has top and bottom ends coupled to the outer and inner tubes, respectively. The inner tube extends through an upper buffer pad disposed below the first top plate. The upper buffer pad has an upper face abutting the first top plate and a lower face for abutting an abutting edge of the inner tube in the highest position. A lower buffer pad is disposed above the bottom plate and includes a lower face abutting the bottom plate and an upper face for abutting a bottom end of the inner tube in the lowest position.