Keyboard Substrate Elastic Bridge Wedge Stress Distribution
Find Innovative SolutionsGenerate Solutions
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 wedge portions, allowing for adjustable assembly and reducing stress on critical corners to prevent damage and maintain precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the substrate is designed as a single base plate for assembling components, then the structure is simple, but the assembly precision deteriorates due to manufacturing tolerance accumulation
Solution Approach 1:
The substrate is divided into multiple separate plates (first plate, second plate, third plate) instead of using a single base plate. Each plate can be manufactured independently with smaller tolerances, and they are connected through elastic bridge members. This segmentation allows each component to be manufactured with higher precision while maintaining overall structural simplicity.
2Device complexity
If the elastic bridge member is connected directly at inner corners of bridge seats, then the connection is simple, but the stress concentration causes the bridge member to break easily
Solution Approach 1:
A wedge portion is added at the inner corner of the bridge seat before the stress can concentrate at that critical point. This wedge portion acts as a stress-distributing element that prevents stress concentration, thereby preventing the elastic bridge member from breaking easily or exceeding its elasticity limit during assembly and operation.
3Manufacturing precision
If the substrate is divided into movable plates connected by elastic bridge members, then the assembly precision is improved by eliminating tolerance accumulation, but the device complexity increases
Solution Approach 1:
The substrate structure transitions from a static single plate to a dynamic assembly of multiple movable plates connected by elastic bridge members. This allows the plates to move relative to each other during assembly, enabling tolerance compensation and adjustment, while the elastic bridge members provide the necessary flexibility and stress distribution.
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 precise assembly by eliminating manufacturing tolerance issues and preventing damage to the elastic bridge members, ensuring accurate and durable keyboard performance.
Implementation Method 1
The elastic bridge member is connected between the first side edge and the second side edge. The first plate is movable relative to the second plate.
Implementation Method 2
The elastic bridge member further comprises a wedge portion connected to an inner corner between the elastic bridge member and the first bridge seat. Therefore, the stress is not focused at the inner corner when the elastic bridge member is forced and moved, thereby greatly reducing the stress suffered by the inner corner
Data Source
AI summary
A keyboard device includes a substrate and keycaps disposed on the substrate. The substrate includes a long slit and an elastic bridge 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 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 bridge seat. The second side edge includes a second bridge seat. The elastic bridge member is connected between the first bridge seat and the second bridge seat. The elastic bridge member includes a wedge portion connected to an inner corner between the elastic bridge member and the first bridge seat.