Terminal Block Hole Layout for Accurate Insert Molding
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Solution Overview
Problem
The existing terminal block manufacturing process through insert molding faces challenges in ensuring positional accuracy of holes when they are oriented in an inclined direction, as positioning pins cannot be passed through holes extending in such directions, affecting assembly and liquid tightness.
Innovation Solution
A terminal block design featuring a resin main body with a terminal having a first hole extending outward in an inclined direction and a second hole spanning from the inside to the first hole, allowing the positioning pin to pass through the second hole for accurate positioning, even when the first hole is inclined, and incorporating additional holes for improved assembly and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the hole of the terminal is oriented in an inclined direction to meet assembly requirements, then the adaptability of the terminal block is improved, but the positioning pin cannot be passed through the hole, resulting in worsened manufacturing precision
Solution Approach 1:
The patent divides the hole system into two separate holes: a first hole with inclined orientation for assembly adaptability, and a second hole with vertical or horizontal orientation for positioning pin passage. This segmentation allows each hole to fulfill its specific function independently, resolving the contradiction between adaptability and manufacturing precision
Solution Approach 2:
The second hole acts as an intermediary element that enables the positioning pin to pass through the terminal block during insert molding, thereby ensuring manufacturing precision. The positioning pin uses the second hole as a mediator to achieve accurate positioning, while the first hole maintains its inclined orientation for assembly requirements
2Manufacturing precision
If the positioning pin is passed through the first inclined hole, then the positional accuracy can be ensured, but the positioning pin cannot physically pass through due to the inclined orientation
Solution Approach 1:
The patent segments the positioning function from the assembly function by creating two separate holes. The second hole is specifically designed for positioning pin passage with appropriate orientation, while the first hole maintains its inclined orientation for assembly adaptability. This segmentation resolves the conflict between positioning requirements and hole orientation
Solution Approach 2:
The second hole serves as a copy or alternative pathway for the positioning function. Instead of requiring the positioning pin to pass through the inclined first hole, the second hole provides a parallel solution with suitable orientation, allowing the positioning pin to pass through easily while achieving the same positioning objective
Data Source
AI summary
A terminal block that includes: a main body made of resin; and a terminal partly molded into the main body, wherein the terminal includes: a first hole extending through a first portion that protrudes outward from one surface of the main body in an inclined direction intersecting both a vertical direction and a horizontal direction; and a second hole extending through a second portion that spans from an inside of the main body to the first hole in one of the vertical direction and the horizontal direction.