Electromagnetic Switching Device Lever Mechanism
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Solution Overview
Problem
Conventional electromagnetic switching devices require a separate tool for mounting and separating the relay from the junction box, leading to potential contact failures and deformation issues that result in unintentional separation and contact loss.
Innovation Solution
An electromagnetic switching device design featuring a junction box with protrusions and a lever mechanism that allows for easy mounting and separation of the relay without additional tools, utilizing a handle and arc-shaped slits to ensure secure contact and prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a remover tool is used to separate the relay from the junction box, then the relay can be separated for maintenance, but the hook recesses may be permanently deformed and gaps may occur between the relay and junction box
Solution Approach 1:
The relay is designed with a lever that enables users to separate the relay from the junction box using only the relay itself, without requiring an external remover tool. The lever engages with the hook protrusions to provide sufficient mechanical advantage for separation, eliminating the need for separate removal tools and preventing deformation of the hook recesses.
Solution Approach 2:
The lever mechanism transforms the static hook connection into a dynamic system where the lever can be rotated to alternately engage and disengage the hook protrusions. This dynamic mechanism allows controlled separation and mounting while maintaining secure contact during operation, resolving the contradiction between ease of repair and contact reliability.
2Reliability
If hook protrusions are used to fixedly mount the relay to the junction box, then the relay is securely mounted, but the relay cannot be separated without deforming the hook recesses
Solution Approach 1:
The lever mechanism transforms the static hook connection into a dynamic system where the lever can be rotated to alternately engage and disengage the hook protrusions. This dynamic mechanism allows controlled separation and mounting while maintaining secure contact during operation, resolving the contradiction between ease of repair and contact reliability.
Solution Approach 2:
The mounting mechanism is segmented into the lever and hook protrusions as separate components. The lever acts as an independent mechanical advantage element that can be operated separately from the hook connection, allowing the user to disengage the hooks without applying deforming forces to the recesses.
3Ease of repair
If a remover tool is required for separation, then the relay can be removed for maintenance, but additional tools and complexity are required
Solution Approach 1:
The relay is designed with a lever that enables users to separate the relay from the junction box using only the relay itself, without requiring an external remover tool. The lever engages with the hook protrusions to provide sufficient mechanical advantage for separation, eliminating the need for separate removal tools and preventing deformation of the hook recesses.
Solution Approach 2:
The removal function is merged into the relay structure itself through the integrated lever mechanism. The lever combines the functions of mechanical advantage provision and separation execution within the relay assembly, eliminating the need for external tools and reducing overall system complexity.
4Ease of operation
If the lever is hinge-coupled to the casing and caught by protrusions, then tool-free mounting and separation is enabled, but the lever mechanism adds structural complexity
Solution Approach 1:
The lever serves multiple functions: it provides mechanical advantage for separation, engages with the hook protrusions for mounting, and acts as a user interface for operation. This multi-functionality justifies the added structural elements, as the lever integrates several operations into a single component rather than requiring separate mechanisms for each function.
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
Enables secure and tool-free mounting and separation of the relay, preventing contact failures and deformation, ensuring reliable operation and easy maintenance.
Implementation Method 1
The lever may be configured to press the relay toward the bottom plate when rotating in one direction and press the relay in a direction to become distant from the bottom plate when rotating in an opposite direction.
Data Source
AI summary
An electromagnetic switching device is provided that includes a junction box having an accommodating space formed to be one side open by side plates and a bottom plate and a relay having fixed contacts and movable contacts within a casing and detachable to and from the accommodating space, where the junction box includes a pair of protrusions that protrude from the side plates to an opposite side to the accommodating space, the relay includes a lever hinge-coupled to the casing and engaged by the pair of protrusions and the lever is configured to press the relay toward the bottom plate when rotating in one direction and to press the relay away from the bottom plate when rotating in an opposite direction, thereby enabling the relay to be easily detachable from the junction box.