Resin Housing Nut Press-Fit Rib Recess Design
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Solution Overview
Problem
Existing electric connection parts face issues with resin piece scattering during the press-fitting of metal nuts into resin housings, which can interfere with bolt fastening and proper electrical connections, leading to defects in circuits and devices.
Innovation Solution
The electric connection part incorporates a rib protruding from the inner surface of the press-fit groove that extends along the press-fitting direction, pressing the nut and guiding any generated resin pieces into a recess, thereby controlling the generation and accumulation of resin pieces, preventing scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the nut is press-fitted into the housing, then the nut is securely fixed in the housing, but resin pieces are generated and scattered around, interfering with bolt fastening and electrical connections
Solution Approach 1:
The invention converts the harmful resin pieces generated during press-fitting into a beneficial containment scenario by designing a groove that specifically captures and accumulates these resin pieces. The groove transforms the harmful scattering effect into a controlled accumulation within a designated space, preventing interference with bolt fastening and electrical connections while maintaining the securing function of the press-fitting process
2Strength
If the inner wall surface of the press-fit groove is contacted by the nut during press-fitting, then the nut is secured in the housing, but the low-strength inner wall surface is scraped to generate resin pieces
Solution Approach 1:
The groove design accepts the inevitable resin material loss during press-fitting by providing a dedicated containment space. Instead of trying to eliminate the scraping effect, the invention channels the generated resin pieces into the groove, converting the material loss into a controlled scenario where the resin accumulates in a non-interfering location
3Ease of manufacture
If resin pieces scatter around the press-fit groove, then various defects occur including interference with bolt fastening and electrical connections, but the press-fitting process itself remains simple
Solution Approach 1:
The groove structure converts the harmful scattering effect into a beneficial containment mechanism without complicating the press-fitting process. The same simple press-fitting action that generates resin pieces now simultaneously directs them into the groove, maintaining manufacturing simplicity while improving electrical connection reliability by preventing resin interference
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 design effectively prevents resin piece scattering and enhances the positional accuracy of the nut within the housing, improving the workability and reliability of the electrical connections.
Implementation Method 1
a rib (33) that protrudes from an inner side surface (28) of the press-fit groove (27) and extends along a press-fitting direction in which the nut (3) is press-fitted into the press-fit groove (27), and presses the nut (3) to be in contact with the nut (3)
Data Source
AI summary
There is provided an electric connection part including: a nut made of a metal, the nut being used for fixing a conductor; and a housing made of a resin, the housing having a press-fit groove into which the nut is press-fitted. The housing includes: a rib that protrudes from an inner side surface of the press-fit groove and extends along a press-fitting direction in which the nut is press-fitted into the press-fit groove, such that the rib presses the nut to be in contact with the nut; and a recess that is disposed on an extension line in which the rib extends, the recess being recessed in the press-fitting direction.