Non-Round Pen Assembly Using Elastic Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pens with special non-round tubular designs face high production costs and assembly challenges due to the need for precise thread alignment, which increases design and manufacturing complexity.
Innovation Solution
A pen design featuring a pen tube with a non-round tubular appearance, utilizing a connection structure with elastic units and a fastening pin to facilitate assembly, allowing for alignment without requiring precise thread calculations, thereby reducing production costs and enabling easy assembly into a special design form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional thread structures are used on non-round pen bodies, then the pen can be assembled, but the production cost and manufacturing complexity increase significantly due to the need for precise thread alignment
Solution Approach 1:
The connection structure is divided into multiple independent components: a pen body with external threads, a cap with internal threads, and separate positioning structures. This segmentation allows each component to be manufactured independently with standard tolerances, eliminating the need for high-precision thread alignment while ensuring proper assembly through the positioning structures.
Solution Approach 2:
The positioning structure acts as an intermediary element between the threaded connection and the non-round outer shapes. It provides the necessary alignment function without requiring the threads themselves to be precisely aligned, thus mediating between the threading mechanism and the special form requirements.
2Manufacturing precision
If precise thread calculations and hardware processing are used to align non-round pen body and cap, then accurate alignment is achieved, but design and production costs increase
Solution Approach 1:
The positioning structures are designed and manufactured in advance as integral parts of the pen body and cap. These positioning features pre-establish the correct alignment relationship before the threading operation, eliminating the need for complex post-assembly adjustments or high-precision thread calculations.
3Ease of operation
If conventional thread structures are used on non-round pens, then connection is possible, but assembly difficulty increases due to alignment requirements
Solution Approach 1:
The connection system is segmented into independent positioning features and threading features. The positioning structures guide the assembly process by providing physical alignment references, while the threads provide the securing function. This segmentation simplifies assembly by eliminating the need to coordinate thread alignment with non-round outer shapes.
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 reduced production costs and simplified assembly of pens with non-round tubular shapes, enabling accurate alignment of non-round pen bodies and caps without the need for precise thread matching, thus lowering design and manufacturing complexities.
Implementation Method 1
an elastic unit provided at the connection structure... The elastic unit is a spring... the elastic unit is capable of deforming elastically to push the connection structure and the cap towards each other
Implementation Method 2
a conductive elastic unit connected to the battery... the conductive elastic unit is electrically connected to the button and the battery
Data Source
AI summary
A pen includes a pen tube, a connection structure, a cap and an elastic unit. The pen tube includes a pen tube case and a thread portion provided at the pen tube case. The connection structure includes a main body, a corresponding thread portion and an elastic unit fastener. The corresponding thread fastener is located at the main body and is for joining with the thread portion. The elastic unit fastener is provided at the main body. The cap includes a cap case and an elastic unit corresponding fastener provided at the cap case. The two ends of the elastic unit are respectively fastened to the elastic unit fastener and the elastic unit corresponding fastener.