Connector Packing Anchoring via Projection and Through-Hole
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Solution Overview
Problem
Conventional connectors with packings face issues with displacement or detachment when subjected to force, which compromises their waterproofing performance.
Innovation Solution
A connector design featuring a packing with an annular seal portion and a protruding piece portion having a through-hole, combined with a fitting portion that includes a cylindrical member, a projection, and an opening portion, where the projection is inserted into the through-hole to secure the packing in place, preventing detachment and displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a packing is provided between articles to seal space, then waterproofing is achieved, but displacement or detachment of the packing occurs when force acts on it
Solution Approach 1:
The packing is divided into functionally distinct segments: a seal portion for waterproofing and a piece portion with a through-hole for mechanical anchoring. This segmentation allows each part to specialize in its function, with the piece portion providing structural stability while the seal portion maintains the waterproof barrier.
Solution Approach 2:
The projection portion is pre-formed on the fitting portion before assembly, positioned to align with the through-hole in the piece portion. This preliminary positioning ensures that when the packing is installed, the projection automatically engages with the through-hole, preventing displacement before force is applied.
Solution Approach 3:
The projection portion acts as an intermediary mechanical anchor between the fitting portion and the piece portion of the packing. This intermediary structure transfers and distributes applied forces, preventing direct stress on the seal portion while maintaining the packing's positional stability through the piece portion's engagement with the projection.
2Stability of the object's composition
If the through-hole is located closer to the target to be fitted, then the projection can better secure the packing, but the seal portion may be more exposed to force
Solution Approach 1:
The projection portion serves as a force-distributing intermediary positioned near the target, anchoring the piece portion securely while shielding the seal portion from direct force exposure. The projection absorbs and distributes mechanical stresses, preventing concentrated forces from reaching the seal portion.
Solution Approach 2:
By separating the seal portion from the piece portion with the through-hole positioned strategically, the design creates a segmented structure where the piece portion near the target handles mechanical anchoring and force absorption, while the seal portion maintains its protective function away from direct force exposure.
Data Source
AI summary
A connector includes a packing that includes a seal portion having an annular shape and a piece portion protruding from the seal portion and having a through-hole, and a fitting portion that holds a terminal, is mounted with the packing, and is fitted to a target to be fitted so that a space between the fitting portion and the target to be fitted is sealed by the packing. The fitting portion includes a first member that includes a cylindrical portion having an outer surface on which the seal portion is mounted, a second member that is attached to the cylindrical portion, a projection portion provided in one member of the first and second members, is inserted into the through-hole, and includes a tip projecting from the through-hole, and an opening portion provided in the other member of the first and second members and into which the tip is inserted.