Electronic Pen Split Pressure Transmitter 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 other than the axial direction, leading to inaccurate input detection and unnecessary drawing.

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 intersecting the axial direction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the core body and pressing component are connected through a single continuous conductive elastic component, then electrical conductivity is maintained, but the pressing component tilts when pressure is applied in directions intersecting the axial direction

Engineering Contradiction:

Improveelectrical conductivityVSAvoidpressing component stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The conductive elastic component is divided into two separate components: a first conductive elastic component connecting the core body to the circuit board, and a second conductive elastic component connecting the pressing component to the circuit board. This segmentation allows each component to independently perform its function without interfering with the other, preventing tilting while maintaining conductivity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The circuit board serves as an intermediary element between the core body and the pressing component. Both components connect to the circuit board separately, allowing the circuit board to mediate the electrical connection while preventing direct mechanical coupling that would cause tilting when lateral pressure is applied.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If the core body is allowed to slide without stress in the axial direction, then writing pressure detection is improved, but the pressing component tilts when lateral pressure is applied

Engineering Contradiction:

Improvewriting pressure detection precisionVSAvoidpressing component orientation

Core Design Contradiction:

Measurement precisionVSStability of the object's composition

Solution Approach 1:

By separating the conductive elastic components, the pressing component is decoupled from the core body's lateral movements. The pressing component can maintain its orientation while the core body slides freely in the axial direction for accurate pressure detection.

Inventive Principle:

Principle #1Segmentation

3Device complexity

If a single conductive elastic component is used, then device complexity is reduced, but manufacturing precision is compromised due to tilting issues

Engineering Contradiction:

Improvecomponent structure complexityVSAvoidpressure transmission accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The conductive elastic component is segmented into two separate components, which increases structural complexity but significantly improves pressure transmission accuracy by preventing tilting of the pressing component during operation.

Inventive Principle:

Principle #1Segmentation

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 configuration ensures accurate and precise pressure detection by preventing tilting of the pressing component, maintaining appropriate pressure application to the pressure detector, and preventing ink leakage, ensuring consistent and delicate input detection.

Implementation Method 1

a first conductive elastic component, which, in operation, connects the core body and the circuit board

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

a second conductive elastic component, which, in operation, connects the pressing component and the circuit board

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 3

a transmitting component which is located between the core body and the pressure detector and which, in operation, transmits the pressure applied to the core body to the pressure detector

Methodology Applied

Scientific EffectMechanical force transmission: Mechanical Force

Data Source

PatentUS12461609B2Electronic pen

Publication Date: 2025.11.04 WACOM CO LTD

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, and a transmitting component which is located between the core body and the pressure detector and which, in operation, transmits the pressure applied to the core body to the pressure detector, in which the transmitting component includes two separate components including a core body holding component which holds the core body and a pressing component which, in operation, presses the pressure detector, and a rear end surface of the core body holding component and a front end surface of the pressing component are opposed to each other.