Magnetic Trigger Mechanism Centering Ring Alignment
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Solution Overview
Problem
Conventional magnetic triggers face challenges in achieving a balance between short trigger time, low energy consumption, and high energy yield due to structural limitations such as armature tilt and high spring constants, which lead to increased metallic friction and buckling, resulting in inefficient energy release and unreliable trigger characteristics.
Innovation Solution
The magnetic trigger design features a centering ring made of highly permeable material that ensures precise alignment and contact between the armature and socket, reducing armature tilt and using a spring element with a larger diameter than the armature to enhance energy release, along with a bypass for magnetic flux commutation, which reduces trigger energy and increases energy yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the spring is guided directly on the armature, then the spring constant remains relatively high and the energy yield is relatively small, but the armature guidance becomes difficult and metallic friction increases
Solution Approach 1:
The patent introduces a guide sleeve as an intermediary component between the spring and the armature. The guide sleeve has a through-opening that guides the spring while maintaining a larger diameter than the armature, preventing direct contact between the spring and armature. This eliminates metallic friction and buckling while allowing the spring to maintain its guiding function, thereby improving reliability without compromising the spring constant.
2Manufacturing precision
If tighter guides are used to compensate for armature tilt, then alignment precision improves, but jamming occurs
Solution Approach 1:
The patent changes the dimensional parameter of the guide sleeve, specifically making its diameter larger than the armature diameter. This parameter change creates clearance that accommodates armature tilt and misalignment without causing jamming. The guide sleeve thus provides guidance while allowing for manufacturing tolerances and operational variations, maintaining both precision and reliability.
3Use of energy by moving object
If the spring constant is made small with large stroke, then mechanical energy release increases, but the spring becomes difficult to guide and may buckle
Solution Approach 1:
The guide sleeve acts as a mediator that supports the spring during its large-stroke motion. By providing a guided path with appropriate clearance, the guide sleeve prevents lateral buckling of the spring while allowing it to extend and compress freely along its axis. This enables the spring to maintain low stiffness with large stroke for high energy release while remaining stable throughout its 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
This design achieves a reliable and efficient trigger with reduced scatter in trigger parameters, lower trigger energy, and increased energy yield, effectively addressing the limitations of conventional solutions by minimizing armature tilt and friction while maintaining high production reliability.
Implementation Method 1
when no current flows through the excitation coil, the armature remains in a first end position due to the magnetic holding force of a permanent magnet
Implementation Method 2
The second end position of the armature is attained by briefly flowing a current through the excitation coil, accompanied by a reduction in the magnetic holding force
Implementation Method 3
an armature, which is coaxially encompassed by at least in one section of the coil body having at least one excitation coil and which is biased by the force of a pretensioned spring element
Data Source
AI summary
A magnetic trigger mechanism with a yoke with armature opening. The armature is coaxially surrounded by a coil having an excitation coil, which is acted on by a force of a preloaded spring and which remains in a first end position due to magnetic holding force of a permanent magnet when there is no current flowing through the excitation coil. The permanent magnet is arranged at a first end of the armature and the second end position of the armature being achieved by a brief flow of current through the excitation coil together with the accompanying lowering of the magnetic holding force and the spring force. The first end of the armature is guided in the coil body, and the second end position, which faces the armature opening, is guided by a centering ring, the highly permeable centering ring rests against the yoke at the armature opening and can move.