Pressure Touch Pad Bracket Design for Sensitivity and Rigidity
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Solution Overview
Problem
Conventional touch pads have limited pressure detection capabilities, allowing user interactions only in a restricted region below half of the touch pad, and lack the structural design to enhance user experience.
Innovation Solution
A pressure touch pad design featuring a printed circuit board, pressure sensor, pressure sensor bracket, and touch controller, with a reinforced region, non-reinforced region, and flexible arm in the pressure sensor bracket to improve strength, rigidity, and pressure detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a physical button is used to detect user pressing action, then the touch pad can detect pressure, but the user's pressing action can only be executed in a region below 1/2 of the touch pad
Solution Approach 1:
The touch pad is divided into multiple pressure detection regions, with each region having its own pressure sensor and detection mechanism. This segmentation allows the entire surface of the touch pad to be divided into functional zones that can independently detect pressure, enabling users to press any region for different functions.
Solution Approach 2:
The touch pad is designed to support multiple operation types across its entire surface. Any region of the touch pad can serve as a pressure detection zone, making the entire surface universal for executing operations rather than being limited to a specific button region.
2Strength
If the touch pad structure is made more rigid to improve strength, then the sinkage amount increases, but pressure detection sensitivity decreases
Solution Approach 1:
The touch pad structure incorporates different material properties in different regions. The cover plate and base plate are designed with specific thicknesses and material characteristics to provide localized support and flexibility. The pressure sensor region allows for controlled deformation while other areas provide structural support, creating a balance between strength and sensitivity.
Solution Approach 2:
The touch pad uses composite construction with multiple layers including cover plate, pressure sensor, and base plate. Each layer is made from materials with specific mechanical properties that complement each other, allowing the structure to be both strong and sensitive to pressure changes.
3Shape
If the touch pad sinkage amount is reduced to improve hardness, then the structural rigidity increases, but the comfort of pressing action decreases
Solution Approach 1:
The touch pad structure is designed to be dynamically responsive to pressure input. The pressure sensor and associated mechanisms are positioned and configured to detect and respond to pressing actions with appropriate feedback. This dynamic design allows the touch pad to maintain its shape under normal conditions while providing comfortable pressing feedback when activated.
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 enhances pressure detection sensitivity, improves user experience by providing a more comfortable operating experience, and reduces sinkage when pressed, ensuring high hardness and preventing collapse.
Implementation Method 1
the pressure sensor is arranged between the printed circuit board and the pressure sensor bracket, and is configured to, when the finger presses the pressure touch pad, deform and output a corresponding pressure sensing signal
Implementation Method 2
the cantilever beam is connected to the printed circuit board through an elastic gasket
Data Source
AI summary
A pressure touch pad, a pressure touch pad assembly, and an electronic device are provided. The pressure touch pad includes a printed circuit board, a pressure sensor, a pressure sensor bracket, and a touch controller. The printed circuit board is stacked on the pressure sensor bracket, a touch electrode layer is provided on the printed circuit board, the touch electrode layer is configured to output a touch sensing signal when a finger touches the touch pad; the pressure sensor is configured to deform and output a pressure sensing signal when the finger presses the pressure touch pad; and the pressure sensor bracket includes a reinforced region, a non-reinforced region, and a flexible arm, the reinforced region is fixedly connected to the printed circuit board, the non-reinforced region is fixedly connected to an outer case, and the flexible arm is connected to the reinforced region and the non-reinforced region.