Connector Packing Notch Prevents Biting
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Solution Overview
Problem
Connectors with resin ring portions at the base of the packing main body often experience biting issues during fitting, leading to compromised waterproof performance, which can result in product defects.
Innovation Solution
Incorporating a notch portion in the resin ring portion and a tapered thick portion at the distal end of the packing main body to enhance the connector's waterproofing capabilities without altering the number of parts or configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin ring portion is provided at the base end of the packing main body to retain the packing in the fitting portion, then the packing can be locked to the housing, but biting of the packing during fitting to the counterpart connector may occur
Solution Approach 1:
The patent applies local quality by providing a tapered thick portion at the distal end of the packing main body. This localized structural modification increases rigidity specifically at the distal end where biting occurs during fitting, while maintaining the elastic properties of the rest of the packing main body for effective sealing. The different material distribution (thicker at distal end, thinner at base end) creates varying local properties to simultaneously prevent biting and ensure waterproofing.
2Reliability
If the packing is compressed between the resin ring portion and the fitting portion, then the packing seals the space, but the distal end side of the packing may rise
Solution Approach 1:
The patent applies parameter changes by modifying the cross-sectional dimensions of the packing main body along its length. The tapered thick portion at the distal end increases the local thickness parameter, which provides sufficient material to prevent rising when compressed during assembly. This dimensional parameter change ensures that the packing maintains its shape and position under compression while achieving effective sealing.
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
The notch and tapered features prevent the distal end of the packing from rising, ensuring a secure, waterproof fit between the connector and the counterpart connector, thus resolving biting issues and maintaining satisfactory waterproof performance.
Implementation Method 1
when the elastic member of the main body is compressed between the resin ring portion and the fitting portion
Data Source
AI summary
According an aspect of the invention, a connector includes a housing that includes a fitting portion having an outer periphery to which a cylindrical counterpart fitting portion of a counterpart connector is loosely fitted, a ring-shaped packing that includes a main body that is formed of an elastic member and is externally inserted in a tightly fitted manner to the outer periphery of the fitting portion so as to water-tightly seal a space between the fitting portion and the counterpart fitting portion, a ring-shaped resin ring portion that is provided at a base end of the packing, is formed of resin having a higher rigidity than the main body, and is locked to an engagement portion provided in the housing, and a notch portion that is provided in a part of an inner periphery of the resin ring portion.