Terminal Block Locking Handle Mechanism for Vibration-Resistant PCB Mounting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inferior connections between terminal blocks and circuit boards, often caused by vibrations, lead to loose or detached connections, resulting in broken circuits and unreliable signal transmission or power delivery.
Innovation Solution
A terminal block fastening device with a locking handle mechanism featuring a force arm, resilient arm, and inclined surface, allowing for automatic fastening and easy detachment with minimal effort and displacement, enhancing the anti-pull-out effect and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional terminal block connection is used, then the structure is simple, but the connection becomes loose or detached due to vibrations leading to broken circuits
Solution Approach 1:
The locking handle mechanism automatically fastens the circuit board when inserted, using the insertion motion itself to trigger the locking action through the force arm and resilient arm interaction, eliminating the need for separate manual fastening operations
Solution Approach 2:
The resilient arm provides dynamic response to vibrations and forces by flexing and restoring, maintaining continuous contact pressure between the fastening portion and the circuit board to prevent detachment while absorbing mechanical shocks
2Reliability
If a secure fastening mechanism is added to prevent detachment, then connection reliability improves, but the device size increases
Solution Approach 1:
The locking handle mechanism is integrated within the terminal block body structure, with the force arm and resilient arm nested within the housing, allowing the fastening mechanism to occupy minimal additional space while providing secure attachment
Solution Approach 2:
The locking handle combines multiple functions including fastening, locking, and releasing mechanisms into a single integrated component that interacts with the circuit board through its fastening portion, reducing the need for separate fastening devices
3Reliability
If manual fastening operations are required to secure the circuit board, then connection stability improves, but labor and time consumption increase
Solution Approach 1:
The locking handle is pre-configured in a locked state during assembly, and the circuit board insertion motion automatically triggers the fastening action through the force arm mechanism, performing the securing operation before final positioning is achieved
Solution Approach 2:
The insertion of the circuit board itself activates the fastening mechanism through the inclined surface interaction with the force arm, making the circuit board insertion process self-securing without requiring separate manual fastening operations
4Reliability
If a complex locking mechanism is used to prevent detachment, then connection reliability improves, but ease of operation deteriorates
Solution Approach 1:
The resilient arm provides automatic restoration force that maintains the locked state without requiring continuous manual pressure, while allowing easy release when force is applied to the locking handle, creating a dynamic system that is both secure and easy to operate
Solution Approach 2:
The locking mechanism is divided into distinct functional portions including the force arm for actuation, the resilient arm for maintaining lock state, and the fastening portion for circuit board engagement, allowing each segment to perform its specific function efficiently
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 device provides a reliable and labor-saving method to secure circuit boards, reducing the risk of disconnection and ensuring stable signal transmission or power delivery by requiring less effort and smaller space, while maintaining a compact design.
Implementation Method 1
the resilient arm is resiliently restored to drive the fastening portion of the locking handle to return to the locked state
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A terminal block fastening device (100) includes a body (110) and a locking handle (200). The body (110) includes a socket (124) for insertion of a printed circuit board (10) and two through holes (128) perpendicular to the socket (124). The locking handle (200) is installed in the body (110). The locking handle (200) has a force arm (230), a fastening portion (202) connected to one end of the force arm (230), a pivot point (220) connected to the other end of the force arm (230), and a resilient arm (210) disposed between the fastening portion (202) and the force arm (230). The fastening portion (202) is operatively associated with the resilient arm (210) to move between a locked state (L) and a released state (R), so that the anti-pull-out effect on the printed circuit board (10) is improved.