Staking Pin Radial Expansion for Fiber-Optic Connector Retention
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Solution Overview
Problem
Fiber-optic connectors face challenges in precision installation of retaining fixtures, leading to compromised integrity and performance due to poor installation methods, which are difficult to manufacture and secure within the connector body.
Innovation Solution
A connector design featuring a housing with an aperture and a retaining pin that includes a chamfered cavity and a projection, where a staking pin ball is inserted to radially expand and secure the pin within the connector body, facilitating easy and secure installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If retaining fixtures are manually inserted and secured within the connector body, then installation flexibility is maintained, but manufacturing precision and installation reliability deteriorate
Solution Approach 1:
The retaining fixture is pre-formed with an expandable structure that includes a cavity and projection. During installation, the fixture is first inserted into the aperture in a compact state, then expanded using a staking tool that applies force to the projection, causing radial expansion of the fixture walls to engage with the aperture interior surface. This preliminary preparation of the expandable structure enables both easy insertion and precise positioning.
Solution Approach 2:
The retaining fixture transitions from a static inserted state to a dynamic expanded state. The fixture includes an expandable body with a cavity that can radially expand when force is applied to the projection. This dynamic transformation allows the fixture to adapt its size and shape during installation, first fitting through the aperture easily, then expanding to achieve precise engagement with the aperture walls.
2Strength
If retaining fixtures are integrally formed with the connector body, then structural integrity is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The retaining fixture is separated from the connector body as a distinct component. The fixture includes a body with a cavity and a projection, allowing it to be manufactured separately and then installed into the aperture. This segmentation simplifies the overall manufacturing process while maintaining structural integrity through the expansion mechanism that creates a secure mechanical bond between the fixture and the connector body.
Solution Approach 2:
The retaining fixture is designed to be nested within the aperture of the connector body. The fixture's expandable structure allows it to be inserted in a compact form and then expanded to fit tightly within the aperture, creating a nested configuration where the fixture is contained within the connector body while maintaining structural strength through the expansion engagement.
3Adaptability or versatility
If manual installation methods are used for retaining fixtures, then installation adaptability is maintained, but installation reliability and environmental resistance deteriorate
Solution Approach 1:
The fixture is pre-configured with an expandable structure including a cavity and projection designed for controlled expansion. This preliminary preparation ensures that when the staking tool applies force to the projection, the fixture expands uniformly and reliably to engage with the aperture walls, creating a consistent and environmentally resistant connection that maintains reliability across different installation conditions.
4Ease of manufacture
If expanding structures are used to secure the pin, then installation ease is improved, but structural complexity of the pin increases
Solution Approach 1:
The pin incorporates a dynamic expandable structure with a cavity that can radially expand when force is applied to the projection. This dynamic capability allows the pin to transition from a compact insertion state to an expanded engagement state, simplifying installation while the expansion mechanism provides the necessary structural complexity to ensure secure retention within the aperture.
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
This method ensures a strong, environmentally resistant, and predictable optical performance by securely fastening the pin within the connector body, enhancing manufacturing ease and reducing installation errors.
Implementation Method 1
inserting an object within the cavity, the object having an outer dimension greater than an inner dimension the cavity, thereby expanding the external surface of the pin and securing the pin to the body
Data Source
AI summary
A body, such as a connector for use in cable assemblies, includes a staking pin or retaining body inserted and secured within an aperture extending from a first surface to a second surface of the body. A portion of the pin extends through the aperture and beyond one of the surfaces (which provides a pin function for a desire application). A plurality of projections or grooves positioned along the external surface of the staking pin are substantially flush with a surface of the aperture to retain its position in the body. The staking pin includes a cavity, a portion of which preferably has a chamfered surface to aid in disposing an object, such as a staking pin ball, within the cavity. The cavity is capable of radially expanding when the staking pin ball, having an outer dimension greater than an inner dimension the cavity, is inserted within the cavity of the pin.