Electronic Pen Button Assembly with Sliding Rod and Limiting Engagement
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Solution Overview
Problem
Existing electronic pen button structures face limitations in shape design due to internal assembly, leading to poor safety and larger exposed portions that are not freer, and they often require smaller sizes for assembly, which restricts design flexibility and increases the risk of sharp edges.
Innovation Solution
An electronic pen button assembly with a pen core having a rod body and a pen tip, where the rod body features a first limiting portion, such as a groove, that mates with a second limiting portion in the housing, allowing sliding fit and preventing rotation, enabling a triggerable button mechanism with improved safety and design flexibility by allowing external assembly and preventing the pen core from dropping out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the electronic pen button structure uses internal assembly to imitate traditional writing pens, then the hand feeling and shape resemblance are improved, but the design flexibility is reduced and the exposed portion size is constrained
Solution Approach 1:
The pen core is divided into separate components: the rod body with limiting portion and the housing with corresponding limiting structure. This segmentation allows independent design and assembly, freeing the pen tip shape from constraints of traditional internal assembly while maintaining the desired hand feeling.
Solution Approach 2:
Instead of assembling the button structure internally from the pen tip inward, the invention inverts the assembly approach by using external assembly where the rod body is inserted into the housing from the opposite direction. This inversion resolves the contradiction by enabling design freedom without increasing overall complexity.
2Object-affected harmful factors
If the exposed portion is made smaller to improve safety, then the risk of sharp edges is reduced, but the button triggering mechanism becomes more constrained
Solution Approach 1:
The limiting portion and limiting structure are designed in advance to guide the rod body during insertion, ensuring proper positioning before button engagement. This preliminary action allows the exposed portion to be optimized for safety while maintaining easy button triggering through pre-established geometric constraints.
3Adaptability or versatility
If traditional internal assembly is used, then the button can be triggered, but the design is restricted and safety is compromised due to larger exposed portions
Solution Approach 1:
The limiting portion on the rod body and the corresponding limiting structure in the housing use asymmetric geometric shapes that provide both design flexibility and reliable connection. The asymmetric design prevents rotation and ensures proper orientation while allowing freedom in the overall pen tip shape design.
Data Source
AI summary
An electronic pen button assembly includes a pen core, a housing, and a button. The pen core includes a rod body and a pen tip disposed at a first end of the rod body. A first limiting portion is disposed on the rod body. The housing includes a pen head with a via hole, and a second limiting portion is disposed in the housing. The rod body extends into the housing through the via hole, and the first limiting portion is matably connected to the second limiting portion. The pen core is in sliding fit relative to the housing in an extension direction of the rod body. The button is disposed in the housing, and the bottom is triggerable by a second end of the rod body during sliding of the pen core along the extension direction of the rod body.