Writing Instrument With Triangular Hinge Body
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Solution Overview
Problem
Common writing instruments with cylindrical bodies are prone to instability during use due to the way they are grasped, leading to undesirable rolling and discomfort.
Innovation Solution
A writing instrument with a specially configured body featuring pivotable hinge leaves and hollow bored knuckles that allow the scribing means to extend and retract, providing a triangular cross-sectional shape for ergonomic holding and secure grip, and a mechanism for counter-rotating movements to facilitate secure holding and compact storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cylindrical body is used for the writing instrument, then the manufacturing is simple and the structure is compact, but the instrument becomes unstable and rolls during use due to the grasping method
Solution Approach 1:
The writing instrument body is divided into multiple segments (first body portion, second body portion, third body portion) connected by hinge joints. This segmentation allows the body to change configuration from a compact cylindrical shape to an extended triangular shape, providing both manufacturing simplicity and writing stability.
Solution Approach 2:
The writing instrument incorporates hinge joints that allow dynamic reconfiguration between a compact state (for storage) and an extended state (for writing). The hinge mechanism enables the body to adapt its shape based on usage requirements, resolving the contradiction between compactness and stability.
2Device complexity
If a cylindrical body is used for the writing instrument, then the structure is simple, but the ergonomic holding is poor and causes discomfort during use
Solution Approach 1:
The body is segmented into multiple portions with hinge joints, allowing the formation of a triangular cross-sectional configuration during writing. This triangular shape provides superior ergonomic holding compared to a cylindrical shape, while the segmented structure maintains relative simplicity.
Solution Approach 2:
The writing instrument changes its geometric parameters (shape, cross-section) based on usage state. During writing, the body forms a triangular configuration for ergonomic holding; during storage, it returns to a compact form. This dynamic parameter change resolves the contradiction between structural simplicity and ergonomic performance.
3Device complexity
If the writing element is fixed in position, then the structure is simple, but the writing element cannot be easily accessed or stored
Solution Approach 1:
The writing element is mounted on a movable carriage that can slide along the body and be retracted. This dynamic mounting allows the writing element to be easily accessed when needed and securely stored when not in use, while maintaining relative structural simplicity through the sliding mechanism.
Solution Approach 2:
A movable carriage acts as an intermediary mechanism between the writing element and the body. The carriage provides a smooth interface for extending and retracting the writing element, facilitating easy access and storage without complicating the overall structure.
4Volume of moving object
If the writing instrument is designed for compact storage, then the portability is improved, but the writing stability and ergonomic holding are compromised
Solution Approach 1:
The writing instrument employs a dynamic hinge mechanism that allows the body to transition between a compact configuration (for storage and portability) and an extended triangular configuration (for writing stability and ergonomics). This dynamic adaptability resolves the contradiction between compact storage and writing performance.
Solution Approach 2:
The segmented body structure with hinge joints enables the instrument to collapse into a compact form for storage while maintaining the ability to extend into a stable triangular configuration during writing. The segmentation provides the necessary degrees of freedom for this transformation.
Data Source
AI summary
A writing instrument incorporating a plurality of knuckles arranged in a longitudinal series; a tube member and scribing pen combination extending through the knuckles wherein the scribing pen is mounted within the tube member and has a longitudinal scribing end; and incorporating first and second leaves, each leaf among the first and second leaves having proximal and distal ends, the first and second leaves being connected operatively to the knuckles for movement between closed and opened positions, the distal ends being adjacent each other upon movements of the first ad second leaves to their closed positions, the distal ends being displacing circumferentially from each other upon movements of the first and second leaves toward their opened positions.