Bracket-Free Pressure Detection Module for Thin Electronic Housings
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Solution Overview
Problem
Existing pressure detection modules in electronic devices occupy significant internal space and thickness, making it challenging to miniaturize these devices while maintaining accurate pressure sensing.
Innovation Solution
A pressure detection module comprising a first and second electrode, circuit boards, and solder fixing parts, where the electrodes form a capacitor with a compressible insulating layer, allowing for external pressure detection without a bracket, reducing thickness, and improving sensing accuracy by optimizing the arrangement and adhesion of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a traditional pressure detection module with bracket is used, then structural support and stability are improved, but the thickness and internal space occupied by the module increases
Solution Approach 1:
The patent removes the bracket component from the pressure detection module, extracting only the essential elements (electrodes, circuit boards, solder fixing parts) needed for pressure sensing functionality. This elimination of unnecessary structural support elements directly reduces module thickness while maintaining operational stability through the housing's force input area.
Solution Approach 2:
The patent integrates the pressure detection functionality directly into the housing structure by utilizing the force input area of the housing as part of the sensing mechanism. The first circuit board is fixed to the inner surface of the force input area, merging the housing structure with the detection module, thereby eliminating separate bracket components and reducing overall thickness.
2Measurement precision
If the first electrode and second electrode are arranged in a larger area, then pressure sensing accuracy is improved, but the internal space occupied by the module increases
Solution Approach 1:
The patent optimizes electrode arrangement by utilizing the third dimension (thickness direction) through the compressible insulating layer, allowing the electrodes to be positioned closely while maintaining effective sensing area. The force input area of the housing provides structural support that enables accurate pressure distribution across the electrodes without requiring excessive lateral space.
3Length of stationary object
If the pressure detection module is designed with minimal thickness, then device miniaturization is improved, but assembly complexity and manufacturing difficulty increase
Solution Approach 1:
The patent divides the pressure detection module into distinct functional segments: first circuit board with first electrode, second circuit board with second electrode, compressible insulating layer, and solder fixing parts. This segmentation allows each component to be manufactured and positioned independently, then assembled in a straightforward sequence, reducing assembly complexity despite the compact thickness.
Solution Approach 2:
The force input area of the housing serves multiple functions: it provides structural support for the first circuit board, acts as part of the pressure sensing mechanism, and eliminates the need for separate bracket components. This multi-functionality simplifies the overall assembly process while maintaining minimal thickness.
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 enables compact installation of the pressure detection module within electronic devices, enhances pressure sensing accuracy, and simplifies assembly and production, while reducing interference with other components, thus facilitating the miniaturization of electronic devices.
Implementation Method 1
a compressible insulating layer is provided between a second surface of the first electrode and a first surface of the second electrode so that the first electrode and the second electrode form a capacitor
Implementation Method 2
the force input area of the housing drives the first electrode to move towards the second electrode based on received external pressure, so that the capacitance between the first electrode and the second electrode changes to determine a pressure detection result on the external pressure
Data Source
AI summary
A pressure detection module and an electronic device are provided. The pressure detection module includes: a first electrode, a second electrode, a first circuit board, a second circuit board, and at least two solder fixing parts. A first surface of the first circuit board is fixed to an inner surface of a force input area of the housing. A second surface of the first circuit board is fixed to a first surface of the first electrode. A first surface of the second circuit board is fixed to a second surface of the second electrode. Two end sides of the second surface of the first circuit board and two end sides of the first surface of the second circuit board are disposed opposed to each other through the at least two solder fixing parts. Thereby, the pressure detection module does not require a bracket and has a small thickness.