Waterproof Connector Rear Holder Segmentation for Wire Stability
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Solution Overview
Problem
Conventional waterproof connectors face issues where electric wires can be broken due to vibration within the rear holder, and increased friction leads to higher insertion forces, compromising workability.
Innovation Solution
A waterproof connector design featuring a rear holder composed of two separate holder bodies with locking projections and recesses, and draw-in chamfered parts, allowing for easy assembly and reduced friction, preventing wire swing and breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clearance between the inner peripheries of the recesses of the rear holder and the outer peripheries of the electric wires is reduced, then wire swing and breakage are prevented, but the frictional force between the rear holder and the electric wires is increased, requiring greater inserting force
Solution Approach 1:
The rear holder is divided into a pair of half bodies that can be assembled separately. Each half body contains recesses for the electric wires, allowing the wire-containing portions to be positioned and secured before final assembly. This segmentation enables the recesses to be precisely positioned to minimize clearance with the wire peripheries without requiring excessive inserting force, as the half bodies are assembled in a state where the wires are already positioned.
2Device complexity
If the rear holder is formed as a single integrated body, then assembly is simpler, but wire swing during vibration occurs leading to wire breakage
Solution Approach 1:
The rear holder is segmented into a pair of half bodies that are assembled together. Each half body has recesses that correspond to the electric wires, allowing the wires to be positioned and secured between the half bodies. This segmented structure prevents wire swing during vibration while maintaining manageable assembly complexity through the use of joining portions.
Solution Approach 2:
The half bodies are designed to be assembled together in a nested manner, with joining portions that connect the two half bodies to form the complete rear holder. This nested assembly approach allows the wire-containing recesses to be precisely positioned while keeping the overall structure compact and the assembly process manageable.
3Reliability
If the recesses of the rear holder are made tight-fitting for the electric wires, then wire swing is prevented, but the inserting work becomes more difficult due to increased friction
Solution Approach 1:
The rear holder is divided into two half bodies that are assembled separately. Each half body contains recesses for the electric wires, allowing the wires to be positioned and secured before the final assembly step. This segmentation reduces the inserting force required for each half body while ensuring precise wire positioning through the combined structure.
Solution Approach 2:
The electric wires are positioned and inserted into the recesses of the half bodies before the final assembly of the rear holder. This preliminary positioning action allows the wires to be securely held by the recesses without requiring excessive inserting force during the final assembly of the complete rear holder.
Data Source
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AI summary
There is provided a waterproof connector in which swing of electric wires inside a rear holder can be prevented, and insertion of the rear holder into a connector body can be easily performed with a small force. The waterproof connector includes a connector body 2 having a terminal containing room 21 in which a terminal metal fitting 9 of an electric wire 7 is contained, a waterproof plug 3 which is fitted to the electric wire 7 at a wire withdrawing side 23 of the connector body 2 and assembled to the wire withdrawing side 23 of the connector body 2, and a rear holder 5 which is mounted on the wire withdrawing side 23 of the connector body 2 thereby to prevent drop of the waterproof plug 3 from the connector body 2. The rear holder includes a pair of half bodies which are separated as a first holder body 51 and a second holder body 52, wire containing recesses 53, 54 which contain respective semi-circular portions of the electric wire are respectively formed in the first holder body 51 and the second holder body 52, and the first holder body 51 and the second holder body 52 are individually mounted on the wire withdrawing side 23 of the connector body 2 to be combined together.