Electronic Pen Pressing Member Isolates Knocking Force
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Solution Overview
Problem
Electronic pens with writing-pressure detection mechanisms experience accelerated deterioration due to the frequent and higher pressures applied during knocking mechanisms, such as in knock-type ballpoint pens or mechanical pencils, which exceed the writing pressure on the pen tip.
Innovation Solution
An electronic pen design that includes a writing-pressure transmission member and a pressing member, where the force is applied to the core member without applying an axial force to the writing-pressure detector, ensuring that only writing pressures from the pen tip are transmitted to the detector, thereby preventing deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a knocking mechanism is integrated into the electronic pen to enable core extension, then the ease of operation is improved, but the reliability of the writing-pressure detector deteriorates due to accelerated deterioration from frequent and high-pressure knocking operations
Solution Approach 1:
The pressing member is divided into two functional zones: a knocking portion that transmits force to the core extension mechanism, and a writing-pressure detector portion that detects writing pressure. This segmentation allows the knocking function and writing-pressure detection function to operate independently, preventing knocking forces from damaging the detector while maintaining both functionalities.
Solution Approach 2:
Different portions of the pressing member have different functional properties: the knocking portion is designed to transmit high impact forces for core extension, while the writing-pressure detector portion is designed to be sensitive to light writing pressures. This local differentiation of functional quality allows each portion to optimize its performance without interfering with the other.
2Measurement precision
If the writing-pressure detector is positioned to detect pressure on the core member, then the measurement precision of writing pressure is improved, but the object-affected harmful factors increase due to exposure to both writing pressure and knocking pressure
Solution Approach 1:
The harmful knocking pressure is extracted from the detection path by routing it through the knocking portion of the pressing member, which is mechanically decoupled from the writing-pressure detector. Only the beneficial writing pressure is transmitted to the detector through the writing-pressure detector portion, eliminating the harmful factor while preserving measurement precision.
Solution Approach 2:
The pressing member acts as an intermediary structure with differentiated portions: the knocking portion mediates the high-force core extension operation, while the writing-pressure detector portion mediates the low-force writing pressure detection. This intermediary structure filters out harmful knocking forces while transmitting useful writing pressures to the detector.
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 reduces the deterioration of the writing-pressure detector by isolating it from pressures applied during knocking operations, ensuring that only pen tip pressures are detected, thus extending the detector's lifespan.
Implementation Method 1
a writing-pressure detector disposed in the hollow section on a first end of the core member, the first end being opposite to a second end of the core member serving as a pen tip, to detect a pressure exerted on the second end of the core member serving as the pen tip
Implementation Method 2
the writing-pressure transmission member includes a protrusion which, in operation, transmits a writing pressure, which has been exerted on the core member fitted in a fit-in portion included in the writing-pressure transmission member, to the writing-pressure detector
Implementation Method 3
a pressing member configured to apply, based on an operation by a user, a force to the core member from the second end, the second end being opposite to the first end serving as the side of the pen tip, to the first end serving as the pen tip
Data Source
AI summary
An electronic pen indicates a position to a position detection module by transmitting and receiving signals with the position detection module. A cylindrical casing, a core member, a writing-pressure detector, and a writing-pressure transmission member are accommodated in a interior portion of a cylindrical casing. A pressing member applies, based on a user operation, a displacement force to the core member from a first end, which is opposite to a second end serving a pen tip, to the second end serving as the pen tip. The writing-pressure transmission member includes a protrusion which, in operation, transmits a writing pressure, which has been exerted on the core member fitted in a fit-in portion included in the writing-pressure transmission member, to the writing-pressure detector. The pressing member is configured to apply a displacement force to the core member via the writing-pressure transmission member without applying an axial force to the writing-pressure detector.