Composite Core Body for Position Pointing Device
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Solution Overview
Problem
Position pointing devices used in portable devices face challenges in maintaining strength while minimizing thickness, leading to potential detachment issues and risk of damaging input surfaces due to hard materials, and existing configurations have poor joint affinity and low joint strength between components.
Innovation Solution
A position pointing device with a core body design featuring a leading end part made of elastic material, a pedestal part made of a harder material, and a core body main body part with reduced thickness, where the pedestal part is securely joined to the core body main body part, enhancing joint strength and preventing detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the core body is made thinner to reduce device thickness, then the device becomes more suitable for portable devices, but the joint strength between components deteriorates leading to detachment
Solution Approach 1:
The core body is constructed as a composite structure with a pedestal part made of elastic material and a core body main body part made of harder material. This composite construction allows the thinner core body to maintain sufficient joint strength through the combination of different material properties, preventing detachment while achieving reduced thickness suitable for portable devices.
2Strength
If a hard material is used for the core body to ensure strength, then joint strength is improved, but the risk of damaging input surfaces increases
Solution Approach 1:
Different parts of the core body are made from different materials with different properties. The pedestal part is made of elastic material to prevent damage to input surfaces during contact, while the core body main body part is made of harder material to ensure structural strength and resistance to detachment. This local differentiation of material quality resolves the contradiction between strength and harmlessness.
3Volume of moving object
If the core body thickness is reduced for portability, then device compactness is improved, but the affinity and joint strength between components deteriorate
Solution Approach 1:
The composite construction with elastic material for the pedestal part and harder material for the core body main body part enables the core body to maintain sufficient joint affinity and structural stability even when the overall thickness is reduced. The different material properties compensate for the reduced size, ensuring reliable connection between components in the compact design.
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 solution ensures reliable transmission of writing pressure without risking damage to input surfaces, by improving joint strength and affinity between components, thus preventing detachment and ensuring effective operation in thin, portable devices.
Implementation Method 1
a leading end part formed of an elastic material
Data Source
AI summary
A position pointing device includes a pressure detecting part which detects a pressure applied in an axial direction of a core body. The core body includes: a leading end part formed from an elastic material; a pedestal part which is formed from a material harder than the material of the leading end part and is joined to the leading end part; and a core body main body part which is joined to the pedestal part, is smaller than the pedestal part in thickness in a direction orthogonal to the axial direction, and is formed from a hard material. The core body is housed in a casing and is movable in the axial direction, such that the leading end part is exposed via an opening of the casing, and a pressure exerted on the leading end part in the axial direction is transmitted to the pressure detecting part.