Spring Washer Stack for Electromagnetic Lock Strike Plate
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Solution Overview
Problem
Existing hinged door and window locking systems using electromagnetic attraction suffer from high costs due to numerous parts, and fixing screws loosen over time due to vibrations, leading to malfunctions.
Innovation Solution
A profile and immobilization device with a shock-absorbing and clamping mechanism using a stack of spring washers to secure the strike plate, preventing screw loosening and absorbing shocks, thereby maintaining effective clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple parts (clamping plate, damping element, fixing screws) are used to secure the strike plate, then the strike plate position is maintained, but the cost and assembly complexity increase
Solution Approach 1:
The patent combines the clamping plate and damping element into a single integrated component. The damping element is directly formed as part of the clamping plate structure, eliminating the need for separate parts. This integration reduces the total number of components while maintaining the functions of both clamping and shock absorption, thereby resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The integrated clamping plate serves multiple functions simultaneously: it provides clamping force to secure the strike plate, absorbs shocks and vibrations through its damping element, and maintains position stability. This multi-functionality eliminates the need for separate dedicated components for each function, reducing part count while ensuring reliable strike plate positioning.
2Reliability
If multiple fixing screws are used to secure the clamping plate, then screw loosening is prevented, but assembly time and cost increase
Solution Approach 1:
The patent merges the clamping plate and damping element into one piece, eliminating the need for separate fixing screws to secure the damping element to the clamping plate. Only one fixing screw is needed to secure the integrated component to the strike plate, reducing assembly time and complexity while maintaining reliable fixation through the combined structural integrity of the integrated component.
3Manufacturing precision
If a rigid fixing system is used to secure the strike plate, then positioning is precise, but vibration-induced loosening occurs
Solution Approach 1:
The patent incorporates a damping element as an integral part of the clamping plate, designed beforehand to cushion and absorb vibrations and shocks. This pre-built damping capability prevents vibration-induced loosening of the fixing screw while maintaining precise strike plate positioning. The damping element acts as a built-in protective mechanism that anticipates and mitigates vibrational effects before they can cause loosening.
Solution Approach 2:
The integrated clamping plate combines rigid materials for positioning precision with damping materials or structures to absorb vibrations. This composite approach allows the single component to provide both precise strike plate positioning and vibration resistance, preventing loosening while maintaining manufacturing precision.
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
Reduces costs, simplifies assembly, and ensures reliable tightening by preventing screw loosening, even under vibrations, while compensating for thermal and mechanical stresses.
Implementation Method 1
a shock-absorbing and clamping device interposed between the counter plate and the front side of the hooking wing... the damping and clamping device consists of a stack of spring washers
Implementation Method 2
at least one fixing screw passing through the counter plate engaging with the hooking wing and exerting clamping pressure on the counter plate to hold it in position
Implementation Method 3
an electromagnetic lock that immobilizes the sash (moving part) of the door or window, whether closed or open, by holding it against the frame (or chassis) of the door or window by electromagnetic attraction
Data Source
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AI summary
The present invention relates to a profile and immobilization device for a system for immobilizing a leaf, more particularly a door or window, by electromagnetic attraction, the device comprising a profile (1) having internally a hooking wing (12, 13), a counter plate (2), at least one fixing screw (3) passing through the counter plate (2) engaging with the hooking wing (12, 13) by exerting a clamping pressure on the counter plate (2) to hold it in position, and a shock-absorbing and clamping device interposed between the counter plate (2) and the hooking wing (12, 13).It is characterized in that the damping and clamping device consists of a stack of spring washers (4), preferably metallic, the damping and clamping device extending axially between a first end in contact with the front side of the attachment wing (12, 13) and a second end in contact with the counter plate (2).