Single-Motor Height-Adjustable Desk with Automatic Position Stop
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Solution Overview
Problem
Conventional desks have fixed heights, failing to accommodate individuals of varying heights, and existing height-adjustable desks often require manual adjustments to prevent prolonged sitting.
Innovation Solution
A height-adjustable desk driven by a single motor, featuring a telescoping leg mechanism with screw and gear assemblies, and a switch device that automatically stops the motor when the work surface reaches a predetermined position, allowing for seamless height adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional fixed-height desk is used, then the structure is simple and stable, but it cannot accommodate users of different heights and prevents prolonged sitting
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed-height desk into a height-adjustable system. The telescoping leg mechanism with movable lower tubular members allows the desk height to be dynamically changed between sitting and standing positions, enabling adaptation to different user heights and preventing prolonged sitting.
Solution Approach 2:
The patent applies segmentation by dividing each leg into multiple segments: an upper tubular member and a movable lower tubular member. This segmentation allows independent adjustment of each leg section, providing height adaptability while maintaining structural integrity through the telescoping design.
2Adaptability or versatility
If multiple motors are used to drive height adjustment, then the work surface can be adjusted to any height, but the device complexity and cost increase
Solution Approach 1:
The patent applies the merging principle by combining multiple driving functions into a single motor. The first motor drives both the first and second telescoping legs through a shared transmission mechanism (first gear assembly and second gear assembly), reducing the number of motors from two to one while maintaining the ability to adjust the work surface to any desired height.
Solution Approach 2:
The patent applies universality by designing the single motor to perform multiple functions: it drives both left and right telescoping legs, controls height adjustment for multiple work surface positions, and integrates with the gear assemblies to provide synchronized movement. This multi-functional design reduces device complexity while maintaining full height adjustment capability.
3Ease of operation
If automatic height adjustment is implemented, then user comfort is enhanced, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent applies the self-service principle through the switch device that automatically detects when the lower tubular member reaches a predetermined position and autonomously turns off the motor. This self-service mechanism provides automatic height adjustment without requiring complex control systems, microprocessors, or sensors, thereby enhancing ease of operation while minimizing the increase in device complexity.
Solution Approach 2:
The patent applies feedback through the switch device mounted on the upper tubular member that detects the position of the lower tubular member and provides feedback to the motor control system. When the lower tubular member reaches the predetermined position, the switch device sends a signal to turn off the motor, creating a simple feedback loop that enables automatic height adjustment with minimal added complexity.
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 the work surface to be moved to any desired height, promoting ergonomic working by preventing prolonged sitting and enhancing user comfort and productivity.
Implementation Method 1
a first screw assembly including a first screw and a first nut, wherein the first nut is fixed to the first lower tubular member and is attached to the first screw
Implementation Method 2
a first gear assembly connected to the first screw of the first screw assembly
Data Source
AI summary
A height adjustable desk includes a work surface, a first telescoping leg, a second telescoping leg, a driving device, and a switch device. The first telescoping leg and the second telescoping leg are connected to the work surface, and are driven by the driving device to lift or low the work surface to any desired height. The switch device is mounted on the first telescoping leg to be activated when the work surface is moved to a predetermined position. The switch device will turn the motor off to stop the work surface when the switch device is activated.