Electronic Stylus Strain Structure for Compact, Stable Force Detection
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Solution Overview
Problem
The existing electronic stylus stress transmitting structures occupy a large amount of internal space due to their parallelogram frame design, leading to low space utilization and stability issues.
Innovation Solution
A strain piece with a fixed section, stress section, and detecting section, connected by a pen core bracket, is used, where the fixed section is welded to the pen casing, forming a double-layer frame structure with openings, and incorporating a strain gauge for deformation detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a parallelogram frame structure is used for stress transmitting, then sensitivity and stability are ensured, but internal space is occupied and space utilization rate is low
Solution Approach 1:
The strain piece is divided into three distinct sections: fixed section, stress section, and detecting section. Each section serves a specific function, allowing the structure to maintain stability while reducing overall size and improving space utilization.
Solution Approach 2:
The strain piece adopts a bent and extended configuration rather than a traditional parallelogram frame, transitioning from a two-dimensional frame structure to a three-dimensional bent structure that utilizes vertical and lateral spaces more efficiently.
2Measurement precision
If a parallelogram frame structure is used for stress transmitting, then sensitivity is ensured, but internal space is occupied and space utilization rate is low
Solution Approach 1:
The stress section is specifically designed with different properties from other sections - it is configured to be more flexible and deformable under stress, while the fixed section remains rigid for stable mounting. This localized differentiation maintains sensitivity without requiring a large overall structure.
Solution Approach 2:
The bent and extended configuration of the strain piece allows the detecting section to be positioned in a different spatial orientation, enabling sensitivity detection while minimizing the footprint within the pen casing.
3Volume of stationary object
If the size of quadrilateral frame structure is reduced, then space utilization is improved, but sensitivity and stability cannot be ensured
Solution Approach 1:
By segmenting the strain piece into fixed, stress, and detecting sections, the structure can be miniaturized while maintaining functional integrity. The fixed section provides a stable mounting base, allowing the overall structure to be smaller without compromising stability.
Solution Approach 2:
The strain piece may utilize composite material structures or varying material properties across different sections, allowing a compact design that maintains the necessary mechanical properties for stability and sensitivity without requiring a large quadrilateral frame.
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 improves space utilization and stability while maintaining sensitivity, allowing for more space within the electronic stylus for other components and enhancing the accuracy of force detection.
Implementation Method 1
the detecting section is provided with a strain gauge
Data Source
AI summary
Disclosed are an electronic stylus and an electronic device. The electronic stylus includes: a pen casing and a stress transmitting structure provided in the pen casing; the stress transmitting structure includes a strain piece and a pen core bracket connected to the pen core; the strain piece includes a fixed section, a stress section and a detecting section, and the stress section and the detecting section are respectively connected to two ends of the fixed section and are bent and extended; the pen core bracket is configured to run through the stress section and is connected to the stress section and the detecting section, and the detecting section is provided with a strain gauge; and the fixed section is configured to extend toward a stress direction of the pen core, and the fixed section is welded to an inner wall of the pen casing.