Position Indicator Holder Isolates Chassis Stress
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Solution Overview
Problem
Conventional pen-type position indicators face issues with shock-induced component shift and stress application to the chassis, leading to circuit constant changes and potential damage, as well as challenges in miniaturization and assembly, particularly when modularizing components to prevent direct stress application.
Innovation Solution
A position indicator design featuring a cylindrical chassis with a holder that accommodates the core body and pressure-sensitive components, aligning their central positions to prevent direct stress on the chassis, allowing for easier assembly and maintaining alignment even under shock, and enabling a thinner form factor without the need for modularization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If components are directly accommodated in the chassis, then the structure is simple, but shock causes component position shift and circuit constant change
Solution Approach 1:
A holder is introduced as an intermediary component between the chassis and the internal components (ferrite core, ferrite chip, O ring). The holder accommodates these components and maintains their relative positions, preventing shock-induced position shifts while keeping the overall structure relatively simple. The holder acts as a mediator that isolates the components from direct shock impacts on the chassis.
2Ease of manufacture
If elastic components are directly biased against the chassis, then assembly is simple, but stress is applied to the chassis causing potential damage
Solution Approach 1:
The holder serves as a mediator that absorbs and distributes the biasing stress from elastic components (O ring) away from the chassis. The components are biased against the holder rather than directly against the chassis, preventing stress concentration on the chassis while maintaining assembly simplicity. The holder is designed to withstand these forces without transmitting them to the chassis.
3Object-affected harmful factors
If modularization is implemented to prevent stress application, then chassis stress is reduced, but device complexity and assembly difficulty increase
Solution Approach 1:
Instead of creating separate modular components, the invention merges the stress-isolation function into a single integrated holder structure. The holder combines multiple functions: accommodating components, maintaining positions, and absorbing biasing stresses. This integration achieves chassis stress reduction without the complexity of modularization, as the holder is a single piece that performs multiple protective functions simultaneously.
4Length of moving object
If component size is reduced for miniaturization, then the pen becomes thinner, but shock resistance and alignment maintenance become more difficult
Solution Approach 1:
The holder acts as a mediator that maintains precise relative positions of miniaturized components (ferrite core, ferrite chip) even under shock conditions. By providing a rigid reference structure, the holder enables miniaturization while maintaining alignment accuracy. The holder's structure compensates for the reduced margins for error that come with smaller component sizes, ensuring shock resistance is maintained despite miniaturization.
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 design effectively prevents stress from being applied directly to the chassis, maintains component alignment, and simplifies manufacturing, allowing for a thinner and more robust pen-type position indicator that withstands shocks and high-temperature use without requiring frequent adjustments.
Implementation Method 1
the O ring 103 is a ring-like elastic member which is obtained by forming an elastic material, such as a synthetic resin or a synthetic rubber, into an O-like shape
Implementation Method 2
the ferrite chip 102 comes close to the ferrite core 104 when a pressing pressure (pen pressure) is applied to a core body 101. It is noted that when the ferrite chip 102 with which the core body 101 composing the pen tip is brought in contact comes close to the ferrite core 104 in accordance with the pressing pressure applied to the core body 101, an inductance of the coil 105 is changed in response to this operation
Data Source
AI summary
A position indicator is provided, which includes a chassis that accommodates a holder therein, wherein the holder in turn accommodates various elements therein. The holder includes a core body engaging portion configured to hold a core body, a component disposing portion in which one or more pressure-sensitive components are disposed in an axial direction so as to receive a pressing pressure applied to the core body, and a printed wiring board mounting portion for being engaged with and mounting a printed wiring board with a longitudinal direction of the printed wiring board as the axial direction. The core body and the one or more pressure-sensitive components are held by the core body engaging portion and the component disposing portion in such a way that their central positions are aligned with each other in a predetermined position.