Board Connector Chained Terminals Burr-Free Cutting
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Solution Overview
Problem
Chained terminals with burrs on cutting surfaces pose a risk of debris falling onto circuit boards when mounted, causing operational issues.
Innovation Solution
The terminals are designed with recesses on one side edge, allowing for burr-free cutting surfaces to be positioned inside the housing, and exposed surfaces for easy tool access, ensuring secure mounting and preventing debris from falling onto the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If terminals are cut at carrier connecting/cutting positions, then terminals are separated from the carrier for mounting, but burrs are formed on the cutting surfaces that may fall onto the circuit board
Solution Approach 1:
The carrier is segmented into multiple sections by recesses positioned between adjacent terminals. These recesses create natural separation zones that allow cutting to occur at locations that minimize burr formation risks. The recesses divide the carrier structure so that cutting surfaces are contained within or near the recess areas, preventing burrs from falling onto the circuit board.
Solution Approach 2:
The recesses act as intermediary structures between the cutting surfaces and the circuit board. By positioning recesses at cutting locations, they serve as buffer zones that catch or contain any burrs generated during cutting, preventing direct contact between burrs and the circuit board surface.
2Ease of manufacture
If recesses are provided on both sides across the projections, then cutting surfaces are easily positioned inside the housing, but carrier strength may be reduced
Solution Approach 1:
Resses are provided only on one side edge of the carrier rather than both sides, creating local structural modifications only where necessary for cutting surface positioning. This localized approach maintains carrier strength in unaffected areas while still achieving the goal of positioning cutting surfaces inside the housing for easier manufacturing.
Data Source
AI summary
Chained terminals include a strip-like carrier and terminals arranged side by side in a longitudinal direction of the carrier. The terminal includes a base portion constituting a part of the carrier and projecting portions respectively connected to the base portion and projecting in opposite directions from both side edges of the carrier. The carrier includes notches at positions distant from the projecting portions at least on one side edge. The terminals are cut off from the carrier along cutting surfaces passing through the notches.