Male Terminal Level Difference Scrapes Oxidized Films
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Solution Overview
Problem
Existing electric power tools and battery packs face issues with oxidized films forming on terminals, which can disrupt electrical connections and increase user burden when trying to remove these films, leading to potential connection interruptions.
Innovation Solution
The design incorporates a male terminal with a level difference portion on its side surface, allowing oxidized films to be scraped off during sliding contact, maintaining electrical connections without increasing user burden and ensuring reliable contact points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oxidized films are removed by individual user action, then electrical connection reliability is improved, but user burden and operational complexity increase
Solution Approach 1:
The male terminal automatically removes oxidized films from the female terminal through its own sliding motion during connection. The level difference portion on the male terminal acts as a scraping element that cleans the female terminal surface during the sliding insertion process, eliminating the need for separate user actions to remove oxidation.
Solution Approach 2:
The scraping action occurs during the sliding insertion process itself, before electrical connection is established. The level difference portion removes oxidized films in advance during the sliding motion, ensuring clean contact surfaces are prepared before the terminals make full electrical contact.
2Reliability
If a level difference portion is added to the male terminal, then oxidized film removal capability is improved, but terminal structure complexity increases
Solution Approach 1:
The level difference portion is localized to a specific area on the male terminal rather than changing the entire terminal structure. This localized modification creates the necessary scraping function while minimizing overall structural complexity and maintaining compatibility with existing terminal designs.
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
This configuration effectively removes oxidized films, maintaining stable electrical connections over a long period without complicating user management, ensuring consistent performance of electric power tools, chargers, and adapters.
Implementation Method 1
the female terminal comes into sliding contact with the male terminal... oxidized films formed on the surfaces of the female terminal can be removed
Data Source
AI summary
A female and male connecting structure is provided between a battery pack and a tool main body such that the battery is slidably attached and electrically connected to the tool main body. The female and male connecting structure includes male terminals provided on the tool main body and female terminals provided on the battery pack. A level difference is formed by a concave portion on a sliding surface of terminal portions of the male terminal in a thickness direction of the plate-shaped male terminal. The level difference is made at a plurality of positions to form concavo-convex portions. The sliding surface corresponds to an area with which a contact point of the female terminal comes into sliding contact, and oxidized films formed on the surfaces of the terminal portions can be removed and/or scraped by the concavo-convex portions.