Connector Shell Case Retention via Interlocking Stopper
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Solution Overview
Problem
Conventional connectors face issues with the retention of the shell and case due to the degradation of the elastic protrusion force over time, leading to potential detachment, especially after repeated insertion and withdrawal operations.
Innovation Solution
A connector design that incorporates a stopper inserted into matching hole portions in both the case and shell, providing a stronger and more reliable connection, with the stopper's rectangular shape allowing for easy manufacturing and reliable retention through frictional force, and the use of a metal stopper for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a retaining protrusion of a lance formed integral with the case is engaged in an engaging hole of the shell, then the shell and case are connected, but the connection becomes loose after repeated operations or aging due to decreased protruding force
Solution Approach 1:
The connection system is divided into two independent parts: the integral lance with retaining protrusion and the separate stopper member. The stopper is inserted through aligned holes in the case and shell, creating a distinct retention mechanism that does not rely on the elastic protrusion force of the lance. This segmentation allows the stopper to bear the retention load independently, preventing the connection loosening problem that affects the integral lance design after repeated operations.
2Strength
If a stopper is inserted into hole portions of the case and shell, then the connection between case and shell is strengthened, but the device complexity increases
Solution Approach 1:
The stopper member is designed as a simple, inexpensive component that can be easily replaced. It is inserted through aligned holes in the case and shell, providing strong connection without requiring complex integral structures. The stopper can be individually replaced if loosening occurs, maintaining connection strength while keeping the overall device complexity low through the use of a simple, replaceable part rather than a complex integral design.
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 stopper effectively prevents relative movement between the shell and case, ensuring a firm connection that can withstand operational forces and maintain stability even after repeated use, with the ability to replace the stopper to address any looseness, providing a rational and durable solution.
Implementation Method 1
the inner end of the stopper comes into contact with the outer wall of the contact holder... by a frictional force generated at the time of face contact
Data Source
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AI summary
Provided is a connector having a shell and a case firmly connected to each other. The connector includes a contact (1), a contact holder (5) holding the contact (1), a metal shell (10) accommodating the contact holder (5) and a resin case (20) accommodating the shell (10). A stopper (25) is provided to be inserted into a first hole portion (H1) formed in the case (20) and a second hole portion (H2) formed in the shell (10). The second hole portion (H2) has a same shape as the first hole portion (H1) and is overlapped with the first hole portion (H1).