Module Latch Mechanism with Spring-Loaded Bolt Holder

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Solution Overview

Problem

Existing mechanisms for fixing and releasing modules in module mounting frames are inefficient, often requiring constant spring actuation to insert or remove modules, and do not easily accommodate modules of different dimensions or sizes.

Innovation Solution

A mechanism featuring a latch and spring system with a bolt holder that can move between holding and release positions, allowing the latch to be easily moved between locked and open positions using the spring's bias, facilitating module insertion and removal without constant spring actuation, and accommodating modules of varying dimensions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a spring-loaded plunger mechanism is used to fix modules, then modules can be automatically snapped into place during insertion, but constant spring actuation is required to insert or remove modules

Engineering Contradiction:
ImproveModule insertion and removal operationVSAvoidSpring actuation mechanism complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent extracts the spring mechanism from continuous operation and confines it to a single latching action. The spring-loaded plunger is held in a retracted position by a latch during insertion, then released to perform a single snapping action to secure the module. This eliminates the need for constant spring actuation while maintaining the automatic snap-in function.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The latch mechanism preliminarily restrains the spring-loaded plunger in a retracted position before module insertion. This preliminary action prepares the mechanism for the upcoming latching operation, allowing the module to be inserted without resistance from the spring, and then the latch is released to perform the securing action.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If a tool-operated plunger mechanism is used for module removal, then modules can be securely fixed, but the removal process becomes cumbersome and time-consuming

Engineering Contradiction:
ImproveModule fixation securityVSAvoidModule removal time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The latch mechanism is designed to be manually operable without requiring external tools. The latch can be directly actuated by hand to release the spring-loaded plunger, enabling quick module removal. This self-service design eliminates the need for tool-operated plungers while maintaining secure fixation through the spring mechanism.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The fixing mechanism is segmented into two independent functions: the spring-loaded plunger provides secure fixation, while the separate latch mechanism provides quick release capability. This segmentation allows each component to specialize in its function, with the latch enabling rapid tool-free operation for module removal.

Inventive Principle:
Principle #1Segmentation

3Strength

If conventional bolts or screws are used to fasten modules, then secure fixation is achieved, but the mechanism lacks flexibility for modules of different dimensions

Engineering Contradiction:
ImproveModule fixation strengthVSAvoidAccommodation of different module sizes
Core Design Contradiction:
StrengthVSAdaptability or versatility

Solution Approach 1:

The mechanism uses a dynamic spring-loaded plunger that can adapt its position and force application to modules of different dimensions. Unlike fixed-position bolts or screws, the spring allows the plunger to move and adjust, providing consistent securing force across various module sizes while maintaining strong fixation.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The spring-loaded plunger mechanism serves multiple functions: it provides secure fixation for different module sizes, enables automatic snap-in during insertion, and works with the latch to provide quick release. This universal mechanism replaces the need for dimension-specific fastening solutions like conventional bolts or screws.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 mechanism simplifies the insertion and removal of modules by reducing the need for constant spring actuation and allows for flexible accommodation of modules of different sizes, enhancing usability and installation space efficiency in module mounting frames.

Implementation Method 1

A spring is provided. The mechanism further includes a latch holder which can be reciprocated between a holding position in which it retains the latch against the bias of the spring

Methodology Applied
Scientific EffectSpring force: Spring

Data Source

PatentEP3477315B1Mechanism
Publication Date: 2020.10.14 ODU GMBH & CO KG
  • EP3477315B1 patent drawingFigure 1
  • EP3477315B1 patent drawingFigure 2
  • EP3477315B1 patent drawingFigure 3

AI summary

A mechanism (4) for fixing a module (5) inserted into a module receiving frame (1) to the module receiving frame (1) and releasing the module (5) for removal from the module receiving frame (1), comprising a latch (6) arranged on the module (5) or the module receiving frame (1) which can be moved back and forth between an open position and a locked position of the latch (6), and a spring (7) to bias the latch (6) into one of the two positions open position or locked position. The mechanism (4) also has a bolt holder (11) which can be moved back and forth between a holding position, in which it holds the bolt (6) against the preload of the spring (7), and a release position, in which it does not hold the bolt (6) against the preload of the spring (7), and is designed and arranged such that both the holding position and the release position are a rest position of the bolt holder (11).Furthermore, a module mounting frame (1) with the mechanism (4). A module (5) with the mechanism (4). In addition, a system comprising the mechanism (4), a module (5), and a module mounting frame (1). Finally, a receiver or an interchangeable test adapter for a mass interconnect, wherein the receiver or the interchangeable test adapter comprises the system.