Electronic Pen Pressure Transmission Structure for Tilt-Free Detection
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Solution Overview
Problem
Existing electronic pens face issues with tilting and ink leakage when pressure is applied in directions intersecting the axial direction, leading to inaccurate writing pressure detection and unnecessary input.
Innovation Solution
The electronic pen features a transmitting component with two separate components: a core body holding component and a pressing component, where the rear end surface of the holding component and the front end surface of the pressing component are opposed to each other, allowing for precise pressure transmission even when forces are applied in directions other than the axial direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single continuous core body is used to connect the pen tip and electronic circuit, then electrical conductivity is maintained, but the core body tilts when pressure is applied in directions intersecting the axial direction
Solution Approach 1:
The core body is divided into two separate components: a first core body portion (conductive) that maintains electrical connection, and a second core body portion (non-conductive) that provides structural stability. This segmentation allows the conductive portion to maintain electrical continuity while the non-conductive portion resists tilting under lateral pressure, solving both the conductivity and stability issues simultaneously.
2Measurement precision
If the core body is allowed to slide freely in the axial direction, then writing pressure detection is improved, but ink leakage occurs when no writing pressure is applied
Solution Approach 1:
Different sections of the core body structure are assigned different properties: the first core body portion is made conductive to maintain electrical connection for pressure detection, while the second core body portion is made non-conductive to provide structural support and prevent ink leakage. This local differentiation of material properties allows the system to achieve both precise pressure detection and leak prevention.
3Reliability
If a conductive elastic component connects the pen tip and shaft part, then electrical connection is maintained, but the core body tilts under intersecting pressure
Solution Approach 1:
The connection structure is segmented into a conductive elastic component for electrical connection and a separate non-conductive structural component for stability. This segmentation allows the elastic component to maintain electrical continuity while the structural component provides rigidity to prevent tilting under lateral pressure.
Data Source
AI summary
Provided is an electronic pen including a core body; a pressure detector which, in operation, detects a pressure applied to the core body; a transmitting component located between the core body and the pressure detector, wherein the transmitting component includes two separate components including a first holding component and a pressing component, wherein the first holding component holds the core body, and wherein the pressing component, in operation, presses the pressure detector and transmits the pressure applied to the core body to the pressure detector; and a second holding component having an inner space in which the transmitting component is disposed, wherein at least part of the first holding component protrudes from an opening on a front end of the second holding component, and wherein at least part of the pressing component protrudes from an opening on a rear end of the second holding component.