Magnetic Latching Relay Pushing Latch Mechanism
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Solution Overview
Problem
Conventional magnetic latching relays face issues with stability and reliability due to mechanical distortion, lack of contact pressure, and inadequate monitoring of connection and disconnection statuses, leading to inconsistent performance and difficulty in determining the operational state of the relay.
Innovation Solution
A magnetic latching relay design featuring a pushing latch mechanism with a position restoring bracket and a monitor switch, allowing for reliable connection and disconnection, and enabling external monitoring of the relay's status through a display device, ensuring consistent contact pressure and visibility of operational states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bent bracket is used to mechanically press the contact, then initial contact pressure is achieved, but the bracket distorts over time due to stress release and manufacturing variations, causing inconsistent contact pressure and product failure
Solution Approach 1:
The pushing latch is designed to automatically maintain contact pressure through its own structural elasticity and mechanical interaction with the bracket, without requiring external adjustment or intervention. The latch self-regulates pressure as the bracket moves between connected and disconnected states
Solution Approach 2:
The pushing latch changes the mechanical parameter of contact pressure dynamically by moving between inserted and retracted positions. This allows the system to maintain optimal contact pressure throughout the product lifecycle rather than relying on fixed bracket elasticity
2Reliability
If a conventional snap-on design is used for the pushing latch, then simple installation is achieved, but the latch cannot achieve very good contact or detachment after long time use
Solution Approach 1:
The pushing latch is designed with dynamic movement capability along the axial direction of the static plate, allowing it to adapt its position for optimal engagement. The tapered end geometry enables progressive insertion and reliable detachment through controlled mechanical interaction
Solution Approach 2:
The tapered end of the pushing latch is pre-configured to guide insertion between the reed assemblies, ensuring proper alignment and engagement before full operation. This preliminary geometric configuration prevents misalignment issues that would otherwise develop over time
3Ease of operation
If no monitoring function is provided, then device complexity is reduced, but users have difficulty determining whether the relay is connected or disconnected
Solution Approach 1:
The monitor switch provides real-time feedback on the relay's operational state by detecting the position of the pushing latch. This feedback mechanism uses the existing mechanical movement of the latch to trigger electrical contact changes, providing status information without adding independent monitoring actuators
Solution Approach 2:
The pushing latch serves multiple functions: it actuates the main relay contacts for connection/disconnection and simultaneously triggers the monitor switch to indicate status. This multi-functionality eliminates the need for separate monitoring mechanisms
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 solution ensures high reliability in connecting and disconnecting the relay and allows users to monitor its status, enhancing safety and ease of maintenance by providing clear indicators of connected or disconnected states.
Implementation Method 1
a magnetic latching relay, comprising: a casing, including a coil assembly (2), an electrically conductive plate (4) and a static plate (5) installed therein... the coil assembly includes a yoke (21), a ferrite core (22), a stop nail (23), a terminal pin (24), a magnet (25), an armature (26) and a framework (27), and a coil (28) is wound around an external wall of the framework (27)... excite a coil to induce the operation of a linkage component
Implementation Method 2
The magnetic latching relay is an electronic controller with a connected or disconnected status controlled by a magnetic force produced by a permanent magnet
Implementation Method 3
the reed assembly including a reed (6), a pull-to-disconnect plate (7) installed onto the reed (6), and a contact (8) installed onto the pull-to-disconnect plate (7)... the bracket may be distorted to change the elasticity
Data Source
AI summary
A magnetic latching relay includes a casing containing a coil assembly, an electrically conductive plate and a static plate. A reed assembly is installed on surfaces opposite to the electrically conductive plate and the static plate and includes a reed, a pull-to-disconnect plate installed onto the reed, and a contact formed on the pull-to-disconnect plate. The casing includes a pushing latch latched to the coil assembly. If the relay is connected, the contacts of the reed assemblies of the electrically conductive plate and the static plate will touch each other, or else the pushing latch will be moved axially along the static plate and inserted between the pull-to-disconnect plates of the reed assemblies of the electrically conductive plate and the static plate to separate the contacts, so as to monitor the connected/disconnected status of the relay. An external display device is provided for displaying the connected/disconnected status.