Nested Housing Protects Stylus in Electronic Pen
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic pens are typically larger than conventional writing instruments and may be prone to damage or deformation due to external forces when used in multifunctional pens with rotary or knock-type mechanisms, which can affect their ability to accurately detect writing pressure.
Innovation Solution
A writing instrument design featuring a cylindrical outer housing with an inner housing that securely stores the stylus, allowing the pen tip to extend axially and retract without direct contact with the outer housing, protecting the stylus from damage and ensuring proper writing pressure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the electronic pen is made thin to fit inside the ballpoint pen housing, then it can be placed inside the housing like a refill, but the stylus becomes vulnerable to external force and damage
Solution Approach 1:
The patent implements a nested structure where the electronic pen body is placed inside the ballpoint pen housing, and the stylus is further protected within an inner housing. This multi-layer nesting allows the thin electronic pen to fit inside the outer housing while the inner housing provides additional protection to the stylus against external forces during extension and retraction operations.
2Ease of operation
If the pen tip-side part is extended using rotary or knock type mechanism, then the electronic pen can be deployed for use, but the stylus may come into contact with the housing opening and be damaged or deformed
Solution Approach 1:
The patent introduces an inner housing as an intermediary structure between the stylus and the outer housing opening. During extension operations, the inner housing extends first and contacts the opening, while the stylus remains protected inside. This intermediary structure prevents direct contact between the stylus and the housing opening, eliminating the risk of contact damage while maintaining ease of operation.
3Volume of moving object
If the stylus is made thin to reduce size, then it can fit inside the compact housing, but it may be vulnerable to deformation from external impact
Solution Approach 1:
The patent uses nested housing structures where the thin stylus is placed inside an inner housing that is itself placed inside the outer housing. This nested arrangement maintains the compact size of the stylus while providing multiple layers of protection against external impact, allowing the thin stylus to retain sufficient strength through structural nesting rather than increasing its own thickness.
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 allows for a thin, protected stylus that can accurately detect writing pressure without interference from the outer housing, enhancing the durability and functionality of the electronic pen function in multifunctional pens.
Implementation Method 1
a coil 31 wound around a ferrite core 32 constituting a magnetic material core, characterized in that the coil 31 and the ferrite core 32 are surrounded by the inner housing 33
Implementation Method 2
an electronic pen operated by the electromagnetic induction method or by the capacitive coupling method
Data Source
AI summary
A writing instrument includes a cylindrical outer housing, one end of the outer housing having an outer opening, and an electronic pen body stored in the outer housing. The electronic pen body includes a stylus, one end of the stylus in an axial direction of the stylus serving as a pen tip, and a cylindrical inner housing storing the stylus, the one end of the stylus serving as the pen tip extending from an inner opening at a distal end of the inner housing, the inner opening of the inner housing defining one axial end of a hole extending axially forming a stylus guide that enables the stylus to move axially. In operation, the pen tip of the stylus and a distal portion of the inner housing having the inner opening extend from the outer opening of the outer housing.