Shielded Connector Wire Clamp for Vibration-Stable Holding
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Solution Overview
Problem
Existing connectors face issues with external forces transmitted to terminals due to wire rattling, especially with larger diameter wires, leading to contact wear and potential deformation under high-temperature environments, necessitating improved wire holding mechanisms without enlarging the connector.
Innovation Solution
A connector design featuring a wire holding portion made of synthetic resin externally fitted to the wire, sandwiched between a metal shield shell and a metal wire pressing portion, which is bolt-fastened to the shield shell, ensuring a stable hold even under vibration and high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rear holder made of resin is used to hold the wire, then the wire holding function is provided, but the connector housing must be enlarged to secure sufficient holding force for large diameter wires
Solution Approach 1:
The invention uses a composite structure combining resin (wire holding portion) and metal (shield shell and wire pressing portion). The resin provides flexibility and grip for the wire, while the metal components provide structural strength and rigidity. This composite approach enables sufficient wire holding force for large diameter wires without requiring the entire connector housing to be enlarged.
2Ease of manufacture
If a locking portion with resilient projecting piece is used to assemble rear holder, then the assembly function is provided, but a tiny gap is formed causing rattling and external force transmission
Solution Approach 1:
The invention extracts the wire holding function into a separate wire holding portion that is integrally formed with the shield shell. This eliminates the need for separate locking portions and resilient projecting pieces, thereby removing the source of gaps and rattling while maintaining assembly capability through the integral structure.
Solution Approach 2:
The wire holding portion is merged with the shield shell as an integral structure, eliminating the interface between separate components. This merging removes the tiny gaps that cause rattling and prevents external force transmission, while the assembly function is maintained through the overall connector assembly process.
3Ease of manufacture
If a resin rear holder is used, then the wire holding function is provided, but the holder may be deformed by creep under high-temperature environment causing gap formation
Solution Approach 1:
The invention uses a composite structure where the shield shell (metal) and wire pressing portion (metal) provide dimensional stability under high-temperature conditions. The metal components do not suffer from creep deformation like resin, ensuring that the wire holding structure maintains its shape and does not form gaps in high-temperature environments.
Solution Approach 2:
The invention applies different material properties to different parts: the shield shell and wire pressing portion use metal for high-temperature stability, while the wire holding function uses resin for flexibility and grip. This local differentiation of material quality allows the structure to resist creep deformation where needed while maintaining molding capability.
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 design effectively suppresses the transmission of external forces to terminals while maintaining a compact connector size, reducing wear and damage to wires, and ensuring a stable connection despite varying diameters.
Implementation Method 1
a wire holding portion (22) made of synthetic resin and holding a projecting part (20) of the wire (12) by being externally fit to the projecting part (20)
Implementation Method 2
a wire pressing portion (26) made of metal and sandwiching the wire holding portion (22) between the shield shell (24) and the wire pressing portion (26)
Data Source
AI summary
A connector is provided with a connector housing including a wire pull-out opening, a terminal accommodated in the connector housing, a wire connected to the terminal and to be pulled out to outside of the connector housing through the wire pull-out opening, a wire holding portion made of synthetic resin and configured to hold a projecting part of the wire by being externally fit to the projecting part adjacent to the wire pull-out opening and projecting outward through the wire pull-out opening, a shield shell made of metal and configured to cover the connector housing by being fixed to the connector housing, and a wire pressing portion made of metal and to be bolt-fastened to the shield shell while sandwiching the wire holding portion between the shield shell and the wire pressing portion in a first direction intersecting an axial direction of the wire.