Seamless Touch Front Plate for Hygienic Waterproof Switch Units
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing switch units have front plates that only cover a limited area, leading to seams that can become soiled in dirty or hygienically sensitive environments, such as the food processing industry, and lack waterproofing without additional effort.
Innovation Solution
A switch unit design where the front plate extends over the entire device face, incorporating pressure-sensitive transducers and a processing unit to determine actuation location, allowing for a seamless, waterproof, and easy-to-clean surface, with optional transparent areas for displays or light sources and piezo-electric transducers for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the front plate extends over a larger area than the area covered by the transducers, then the seam between the front plate and the cover is eliminated improving cleanliness and hygiene, but the device complexity increases due to the need for a larger front plate structure
Solution Approach 1:
The front plate is merged with the display device and the housing structure, extending continuously from the actuation area to the edges of the device. This integration eliminates seams and gaps where dirt could accumulate, while the display device itself serves as part of the front plate structure, reducing the need for separate components.
Solution Approach 2:
The front plate serves multiple functions: it acts as the display surface, the protective cover, the actuation surface for touch input, and the sealing element for waterproofing. This multi-functionality reduces the number of separate components needed, thereby managing device complexity while achieving seamless construction.
2Reliability
If the front plate extends over a full face surface of the device, then waterproofing is achieved without extra efforts, but the manufacturing precision requirements increase
Solution Approach 1:
The front plate is integrated with the housing and sealing structures, creating a continuous waterproof barrier. The display device is merged into the front plate structure, eliminating gaps between separate components that would compromise waterproofing and reduce manufacturing precision requirements.
Solution Approach 2:
The front plate is designed as a flexible or semi-flexible structure that can conform to the housing contours and maintain waterproof sealing. This flexibility allows for easier manufacturing while ensuring reliable waterproofing, as the front plate can adapt to minor variations in assembly tolerances.
3Adaptability or versatility
If the processing unit determines the location within the actuation area where the front panel was actuated, then the control functionality is enhanced, but the number of transducers required increases
Solution Approach 1:
The actuation area is divided into multiple zones or regions, each associated with specific control functions. The processing unit determines which zone was actuated based on the location of the touch input, enabling enhanced control functionality without requiring a transducer for every possible control point. This segmentation allows sparse transducer placement while maintaining versatile control.
Solution Approach 2:
The processing unit acts as an intermediary that interprets the location and intensity of transducer signals to determine the intended control function. Rather than requiring direct one-to-one mapping between transducers and control functions, the processing unit mediates by analyzing the actuation location and translating it into appropriate control commands, reducing the number of transducers needed.
4Adaptability or versatility
If the front plate is made transparent to allow display or light source behind it, then the user interface versatility is improved, but the structural strength decreases
Solution Approach 1:
The front plate is constructed from composite materials that combine transparency with structural strength. This may include transparent plastics, glass-composite materials, or multi-layer structures where transparent layers are reinforced with structural layers, achieving both optical clarity for display functionality and mechanical strength for protective purposes.
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 provides a seamless, hygienic, and waterproof interface that simplifies cleaning and maintenance, while allowing for precise actuation location determination and versatile control panel configurations, suitable for various applications including food processing environments.
Implementation Method 1
piezo elements placed in special drillings made in a circuit board
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a switch unit comprising a substantially flat front plate, comprising an actuation area, a structure located behind the front plate, at least two pressure sensitive transducers located in the structure adjacent to the actuation area, the transducers being adapted to convert pressure exerted by the front plate to said at least one transducer into electrical signals and a processing unit adapted to process the signals from said at least two transducers and to determine whether the actuation area of the front plate was actuated, wherein the front plate extends over a larger area than the area covered by the transducers. This feature provides not only a cover without any seams, offering better cleanliness and hygienic circumstances, but also the possibility to make the device waterproof without much extra efforts. The invention also provides a device comprising a switch unit referred to above.