Hand Tool Marking Unit with Stepped Embossed Character
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Solution Overview
Problem
Conventional hand tools with embossed markings suffer from unclear indications due to surface collapse during die pressing, difficulty in electroplating, and wear over time, leading to dirt accumulation and reduced durability.
Innovation Solution
A hand tool design featuring a body with a groove and embossed characters that have a stepped portion, providing an obvious height difference between sections to prevent collapse and facilitate electroplating, ensuring clear markings and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a die presses the handle surface to form a marking unit, then the marking unit is created, but the peripheral edge area collapses and the groove depth is insufficient
Solution Approach 1:
The marking unit is segmented into two distinct parts: a groove portion extending into the handle surface and an embossed character portion protruding from the groove bottom. This segmentation allows the groove to provide depth for clear marking while the embossed character prevents peripheral edge collapse by creating a structural support element
Solution Approach 2:
The marking unit transitions from a two-dimensional surface marking to a three-dimensional structure with the groove extending downward and the embossed character protruding upward from the groove bottom. This dimensional change creates sufficient groove depth for clear indication while the embossed character provides structural support to prevent surface collapse
2Manufacturing precision
If the groove depth is increased to improve marking clarity, then indication effect improves, but electroplating becomes difficult and dirt accumulates
Solution Approach 1:
Instead of making the entire marking unit as a deep groove that is difficult to electroplate, the invention inverts the approach by placing the embossed character at the groove bottom that protrudes upward. This allows the groove to be deep enough for clear indication while the protruding embossed character provides access for electroplating and prevents dirt accumulation
3Reliability
If the marking unit is pressed deeply to prevent wear, then durability improves, but surface collapse occurs and marking clarity decreases
Solution Approach 1:
The marking unit is divided into a groove portion for clear indication and an embossed character portion for durability. The embossed character protruding from the groove bottom provides wear resistance while the groove maintains clear marking visibility without requiring excessive pressing depth
4Manufacturing precision
If the peripheral edge area is pressed to form the marking unit, then the marking is created, but the area collapses and groove depth is reduced
Solution Approach 1:
The marking unit utilizes vertical dimension by creating a groove that extends downward from the surface, then placing an embossed character at the groove bottom that protrudes upward. This vertical development provides sufficient groove depth for clear marking without collapsing the peripheral edge area during pressing
Data Source
AI summary
A hand tool includes a body having first and second surfaces spaced from each other in a height direction. A marking unit is formed on the first surface and includes a groove formed in the first surface of the body. The groove includes a bottom face spaced from the first surface of the body in the height direction. An embossed character protrudes from the bottom face towards the first surface and has a stepped portion to provide a clear indication effect.