Height adjustable desk
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Solution Overview
Problem
Existing height adjustable desks have complex structures, making them costly and difficult to manufacture, and require significant user effort to adjust the desktop height.
Innovation Solution
A height adjustable desk design featuring X-shaped frames with torsion and coil springs that bias the arms to facilitate easy lifting and adjustment, combined with a handle and linkage mechanism for precise height control, allowing for simple assembly and low production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If hydraulic cylinders are used to reduce lifting force, then the force required to lift the desktop is reduced, but the device complexity increases and manufacturing costs increase
Solution Approach 1:
The patent extracts the hydraulic cylinder component from the system and replaces it with a simplified mechanical linkage system consisting of X-shaped frames and biasing means. This removal of complex hydraulic components directly reduces device complexity while maintaining the force reduction function through mechanical advantage provided by the X-shaped frame geometry and spring/biasing mechanisms.
Solution Approach 2:
The patent employs inexpensive biasing means such as springs or elastic elements instead of costly hydraulic cylinders. These simpler mechanical components are easier to manufacture, require less maintenance, and can be replaced more easily, thereby reducing both initial manufacturing costs and long-term operational costs.
2Force
If hydraulic cylinders are used to reduce lifting force, then the force required to lift the desktop is reduced, but the ease of manufacture deteriorates
Solution Approach 1:
By removing hydraulic cylinders from the design, the patent eliminates complex manufacturing processes associated with hydraulic systems (sealing, fluid handling, precision machining). The replacement X-shaped frame structure with biasing means can be manufactured using simpler fabrication methods, improving ease of manufacture.
Solution Approach 2:
The patent divides the height adjustment function into separate modular components: the X-shaped frames and the biasing means. This segmentation allows each component to be manufactured independently using optimized processes and then assembled, greatly improving ease of manufacture compared to integrated hydraulic systems.
3Device complexity
If a simple structure is used to reduce manufacturing costs, then the manufacturing cost is reduced, but the force required to lift the desktop increases
Solution Approach 1:
The patent incorporates biasing means (springs or elastic elements) that provide counterbalancing forces to offset the weight of the desktop. This counterweight mechanism reduces the net lifting force required from the user while maintaining a simple mechanical structure without hydraulic components.
Solution Approach 2:
The X-shaped frames are designed to dynamically change their configuration during height adjustment, transforming the user's input force more effectively. The geometric transformation of the X-shaped structure provides mechanical advantage that reduces lifting force requirements while keeping the overall structure simple and inexpensive.
4Ease of operation
If hydraulic cylinders are used, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent removes hydraulic cylinders and replaces them with a mechanically intuitive X-shaped frame system with biasing means. This simpler mechanical system provides equally easy operation through natural leverage and spring assistance, eliminating the need for complex hydraulic control mechanisms while maintaining ease of use.
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 design reduces the force required to lift the desktop, simplifies manufacturing, and enables easy adjustment to various heights, enhancing user convenience while maintaining structural integrity.
Implementation Method 1
each of the first biasing means is in form of a torsion spring with a first leg engaging the second bottom end of the corresponding second arm and a second leg abutting against an inner side of the corresponding base support
Implementation Method 2
each of the second biasing means is in form of a coil spring with the second end thereof engaging the corresponding base support
Data Source
AI summary
A height adjustable desk including a desktop which engages with a pair of base supports by a pair of X-shaped frames and is adjustable between a fully raised position and a fully lowered position. The pair of X-shaped frames each has a first arm and a second arm. The pair of base supports each has a first biasing member which is configured to bias the corresponding second arm upwards to move the desktop towards the fully raised position, and a second biasing member which is configured to bias the corresponding first arm upwards to move the desktop towards the fully raised position. A pair of height adjustment members is provided on an underside of the desktop, each of which includes a handle, a guiding member, a connecting piece connected to the handle via a linkage mechanism and a biasing member.