Keyboard Substrate Segmentation for Assembly Precision
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Solution Overview
Problem
The manufacturing tolerance of keyboard devices can lead to difficulties in assembly and reduced precision due to the base plate's design, which affects the overall performance of the keyboard.
Innovation Solution
A keyboard device design featuring a substrate divided into movable plates connected by elastic bridge members with stopping members to adjust positions and prevent excessive deformation, allowing for precise assembly and alignment despite manufacturing tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the base plate is designed as a single rigid structure for assembling components, then the structural stability is improved, but the assembly precision deteriorates due to accumulated manufacturing tolerances
Solution Approach 1:
The base plate is divided into multiple separate plates (first plate, second plate, third plate) that are connected through elastic bridge components. This segmentation allows each plate to be manufactured independently with standard tolerances, while the elastic bridge components compensate for accumulated tolerances, thereby maintaining both structural stability and assembly precision.
Solution Approach 2:
The elastic bridge components are designed with specific elastic properties that allow them to deform and adjust the relative positions of the plates. By changing the physical state from rigid to elastic, the system can absorb manufacturing tolerances and achieve precise assembly without compromising structural integrity.
2Manufacturing precision
If the elastic bridge connecting member is made flexible to allow position adjustment, then the assembly precision is improved, but the risk of excessive elastic deformation increases
Solution Approach 1:
Stopping members are pre-installed on the plates to define the maximum movement range of the elastic bridge components. This preliminary constraint prevents the elastic bridges from undergoing excessive deformation during assembly or operation, ensuring both precision adjustment and structural reliability.
Solution Approach 2:
The stopping members act as intermediary elements between the plates and the elastic bridge components. They mediate the interaction by providing physical limits to the elastic deformation, allowing the system to achieve precise positioning while preventing damage from over-deformation.
3Manufacturing precision
If the substrate is divided into multiple movable plates, then the tolerance accumulation is eliminated and assembly precision is improved, but the device complexity increases
Solution Approach 1:
The elastic bridge components serve multiple functions: they connect the plates together, provide elastic deformation to compensate for tolerances, and work with the stopping members to limit deformation. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving precise assembly.
4Adaptability or versatility
If the elastic bridge component is allowed to deform freely, then the position adjustability is improved, but the structural integrity deteriorates due to excessive deformation
Solution Approach 1:
The stopping members are pre-positioned to define the safe deformation range of the elastic bridge components. This preliminary constraint ensures that the components can adjust positions freely within the allowed range while preventing deformation that would compromise structural integrity.
Solution Approach 2:
The stopping members provide beforehand cushioning by physically blocking excessive deformation of the elastic bridge components. This protective measure is built into the structure to prevent damage before it occurs, maintaining both adjustability and structural integrity.
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
This design enables adjustable assembly without affecting precision, preventing elastic deformation and ensuring accurate positioning of keycaps, thus enhancing the keyboard's assembly precision and performance.
Implementation Method 1
The elastic bridge connecting member is connected between the first side edge and the second side edge. The first plate is movable relative to the second plate... preventing the elastic bridge connecting member from exceeding the elastic deformation range
Data Source
AI summary
A keyboard device includes a substrate and several keycaps disposed on the substrate. The substrate includes a long slit and an elastic bridge connecting member. The long slit divides the substrate into a first plate having a first side edge and a second plate having a second side edge opposite to the first side edge. A gap is between the first side edge and the second side edge. The elastic bridge connecting member is connected between the first side edge and the second side edge. The first plate is movable relative to the second plate. The first side edge includes a first stopping member, the second side edge includes a second stopping member, and a certain interval is between the first stopping member and the second stopping member.