Single-action DIN rail latch with dual spring biasing
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Solution Overview
Problem
Existing latch systems for electronics modules on DIN rails are not convenient and effective for single-action operation, requiring tools and complex mechanisms.
Innovation Solution
A latch assembly with first and second latch portions and springs that allow for selective and releasable securing of DIN rail flanges, enabling one-handed operation with linear movement and positive tactile feedback, eliminating the need for tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing latch systems are used for securing electronics modules to DIN rails, then the modules can be securely mounted, but the operation requires tools and complex mechanisms reducing convenience
Solution Approach 1:
The latch assembly is divided into two separate latch portions (first latch portion with first locking tab, second latch portion with second locking tab) that can move independently relative to each other. This segmentation allows each latch portion to be actuated separately while working together to secure the DIN rail flanges, simplifying the overall operation while maintaining security.
Solution Approach 2:
The latch portions are designed to be movable relative to the housing and to each other, transitioning between latched and unlatched configurations. This dynamic design allows the locking tabs to project beyond the recess edges when latched, and retract when unlatched, enabling tool-free operation with simple manual actuation.
2Productivity
If existing latch systems require tool operation, then secure locking can be achieved, but the operation time and complexity increase
Solution Approach 1:
The latch system is designed to be self-actuating through the interaction of the two latch portions and their respective springs. When one latch portion is actuated, it triggers the other latch portion to move accordingly through their movable connection, allowing the system to service itself without external tools or complex actuation mechanisms.
Solution Approach 2:
The two latch portions are merged through a movable connection that allows them to act in coordination. This combining of functions enables a single actuation action to control both latch portions simultaneously, reducing the time and steps required for mounting and dismounting operations.
3Ease of operation
If a single-action latch is implemented, then operation convenience is improved, but the reliability of securing both DIN rail flanges may be compromised
Solution Approach 1:
The movable connection between the two latch portions provides mechanical feedback that ensures both latch portions are properly actuated. When one latch portion moves to the unlatched position, it triggers the other latch portion to move accordingly, providing inherent verification that both locking tabs are properly engaged or disengaged, thus maintaining reliability while simplifying operation.
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 latch system simplifies the mounting and dismounting process, providing a more convenient and effective solution for securing and releasing electronics modules on DIN rails with single-point actuation and secure locking.
Implementation Method 1
a first spring that exerts a biasing force on said first latch portion that urges both the first and second latch portions in a first direction relative to the housing when the first and second latch portions are located in the unlatched configuration
Implementation Method 2
a second spring that exerts a biasing force that urges said first latch portion in said first direction and urges said second latch portion in a second direction that is opposite said first direction
Data Source
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AI summary
An electronics module includes a latch with a first latch portion and a second latch portion. The latch portions move between a latched position and an unlatched position. A spring is located between the first and second latch portions and biases the first and second latch portions in first and second directions. The first latch portion comprises an actuation portion located externally from the housing and that is adapted to be manually engaged and moved linearly in the second direction to move the first latch portion from its latched position toward its unlatched position. The second latch portion includes a resilient tail with a locator tab that seats in either a first receiving location or a second receiving location of the first latch portion and that is selectively deflectable to disengage the locator tab from the second receiving location so that the spring moves the latch to the latched configuration.