Full-Area Touch Mechanism With Resilient Sheet Noise Damping
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Solution Overview
Problem
Conventional full-area touch devices face issues such as manufacturing precision requirements due to discrepancies in resilient angles, noise generation from resonating resilient sheets, and long pressing strokes, leading to increased costs and negative user experience.
Innovation Solution
A full-area touch device with a supporting unit featuring resilient sheet sets connected to extended rod portions and transverse rod portions, along with an adjustment unit to control the pressing stroke, reducing angle discrepancies and noise, and integrating resilient sheets made of stainless steel for improved structural stability and reduced resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If slender resilient sheets are used with inclined resilient angles to connect the floating board to the base plate, then the touch device achieves full-area touch functionality, but manufacturing precision requirements increase due to angle discrepancies causing height differences at corners
Solution Approach 1:
The resilient sheet is divided into multiple segments: a first resilient sheet extending from the middle portion to the blocking plate, and a second resilient sheet extending from the blocking plate to the floating board. This segmentation allows independent optimization of each segment's geometry, reducing the impact of angle discrepancies on overall corner height uniformity.
Solution Approach 2:
The blocking plate with protrusions serves as an intermediary component between the resilient sheets and the floating board. It provides fixed reference points that stabilize the resilient sheets, reducing height variations caused by angle discrepancies and lowering manufacturing precision requirements.
2Device complexity
If slender resilient sheets are used to connect the floating board to the base plate, then the touch device achieves compact structure, but noise increases due to resonance of the resilient sheets when the tact switch is actuated
Solution Approach 1:
The blocking plate integrates multiple functions: it connects the resilient sheets, provides structural support, and dampens vibrations through its mass and geometry. By combining these functions into a single component, the design reduces noise while maintaining compactness.
Solution Approach 2:
The blocking plate with protrusions converts the potential harm of resilient sheet vibrations into a beneficial damping effect. The protrusions make contact with the base plate during actuation, dissipating vibration energy and reducing resonance noise.
3Device complexity
If the blocking plate is positioned far from the middle portion with a long resistance arm, then the resilient sheet structure is simplified, but the pressing stroke increases resulting in poor user experience
Solution Approach 1:
The resilient sheet configuration allows dynamic adjustment of the effective resistance arm length during actuation. As the floating board moves downward, the geometry of the resilient sheets changes, optimizing the mechanical advantage and reducing the perceived pressing stroke for the user.
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 reduces manufacturing costs by lowering precision requirements, minimizes noise, and enhances user experience through shorter pressing strokes and reduced structural resonance.
Implementation Method 1
Each resilient sheet set has a floating plate and two resilient sheets. The resilient sheets are connected to the floating plate, are spaced apart in the front-rear direction, and are respectively secured to the respective pair of the extended rod portions
Data Source
AI summary
A full-area touch device includes a supporting unit and a touch control unit. The supporting unit includes a base plate having an intermediate portion, two side frame portions, and two pairs of extended rod portions respectively connected to opposite sides of the side frame portions, and two resilient sheet sets. Each resilient sheet set has a floating plate that is connected to a respective pair of the extended rod portions, and two resilient sheets that are connected to the floating plate, and that are respectively secured to the respective pair of the extended rod portions, to which the floating plate is connected. The touch control unit is disposed on the floating plates of the resilient sheet sets, and is downwardly pressable from a starting position to a pressed position for driving a resilient movement of at least one of the floating plates of the resilient sheet sets.