Elastomeric Stylus Grip with Conductive Inner Structure
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Solution Overview
Problem
Handheld stylus devices for capacitive screens often have an elongated shape that makes them cumbersome when used with other writing instruments, leading to size and ergonomic issues for users.
Innovation Solution
A handheld device with an electrically conductive pad that can be easily attached to the rear end of a writing instrument, featuring an elastomeric outer part around a conductive internal structure, allowing for radial flexibility and compatibility with various diameters and sections, and providing enhanced ergonomic grip and electrostatic field interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated handheld stylus device is designed with an elongated shape to include a gripping part and conductive elements, then electrical connection with capacitive screens is achieved, but the device size increases and creates ergonomic issues when used with other writing instruments
Solution Approach 1:
The device is divided into two functional segments: a reusable conductive tip component and a removable gripping component. The gripping component can be detached and reattached to different writing instruments, allowing the electrical connection functionality to be segmented from the overall device structure, thus reducing the need for a permanently elongated design.
Solution Approach 2:
The gripping component is designed to be universal and compatible with multiple writing instrument types (pens, pencils, styluses). This multi-functionality allows users to attach the same gripping component to different instruments, eliminating the need for dedicated elongated stylus devices for each writing instrument type.
2Ease of operation
If multiple writing instruments are carried separately, then each instrument maintains its original ergonomic properties, but the user must manage multiple devices which increases overall size and complexity
Solution Approach 1:
The gripping component combines multiple functions into a single attachable unit: it provides ergonomic grip, houses the conductive elements for capacitive screen interaction, and serves as a universal adapter for different writing instruments. This merging reduces the number of separate devices users need to carry and manage.
Solution Approach 2:
The gripping component can be nested onto various writing instruments like a doll inside a doll, creating a compact assembly. When not in use, the gripping component can be stored separately or attached to one instrument, allowing users to have a compact set rather than multiple separate elongated devices.
3Ease of operation
If the gripping part is made entirely of elastomeric material for comfort, then ergonomic grip is improved, but electrical conductivity to the capacitive screen cannot be established
Solution Approach 1:
The gripping component uses local quality by incorporating conductive elements (such as conductive rubber, carbon particles, or metal traces) only in the specific regions that contact the capacitive screen, while the rest of the gripping surface remains soft elastomeric material for comfort. This allows different parts of the same component to have different material properties optimized for their specific functions.
Solution Approach 2:
The gripping component is constructed as a composite material system, combining soft elastomeric material for grip comfort with conductive materials (such as conductive rubber compounds, carbon-loaded polymers, or metal-coated elastomers) to achieve both ergonomic comfort and electrical conductivity simultaneously.
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
Enables the creation of an ergonomic multifunctional assembly that can accommodate different writing instruments, offering improved grip and ease of use while maintaining electrical contact with capacitive screens, thus addressing the ergonomic and size drawbacks of traditional stylus designs.
Implementation Method 1
an elastomeric outer part around an electrically conductive internal structure
Implementation Method 2
said internal structure forming an electrical connection between said pad and at least one conductive surface
Implementation Method 3
an electrically conductive pad... can create a local distortion of the electrostatic field of this screen, which distortion can be detected and located
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
The invention concerns the field of manual devices designed to act with capacitive screens, and more particularly a manual device (1) with a first open end, designed to receive a rear end of a writing instrument in the longitudinal direction, and a second end, opposite the first end in the longitudinal direction and provided with an electrically conductive pad (5). This manual device comprises, between the first and second ends, an outer part (6) made from elastomer and an electrically conductive inner structure (7), said inner structure (7) forming an electrical connection between said pad (5) and at least one conductive surface (9) of the inner structure (7) that is flush through an opening in a gripping surface of said outer part (6).