Electric Magnet Device with Oscillatable Yoke for Impact Resistance
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Solution Overview
Problem
Conventional electric magnet devices face difficulties in smooth armature movement and maintaining attraction between the yoke and armature due to variations in working accuracy, leading to potential disengagement under external forces.
Innovation Solution
The electric magnet device incorporates a coil that oscillates the yoke and armature with a ratio of oscillation angles greater than 1:1 and less than or equal to 3:1, featuring square or circular attraction surfaces and assembly notches on the yoke for improved surface contact and stability, ensuring consistent attraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between centers of leg parts is made less than the distance between centers of bobbin holes, then the armature turns with a small angle and impact resistance improves, but the leg part has difficulty moving in the bobbin hole when working accuracy varies
Solution Approach 1:
The invention makes the yoke oscillatable relative to the bobbin, transforming a static structure into a dynamic one. The yoke can now adjust its position through oscillation to accommodate variations in working accuracy, allowing the armature to move smoothly without being constrained by the fixed distance relationship between leg parts and bobbin holes.
Solution Approach 2:
The invention changes the oscillation angle parameter of the yoke to optimize the distance relationship between the armature and bobbin. By controlling the yoke's oscillation angle, the system can maintain proper engagement between leg parts and bobbin holes even when working accuracy varies, resolving the contradiction between impact resistance and movement smoothness.
2Strength
If external force is applied to move the armature, then the armature turns about an end portion with small angle, but the attraction state between yoke and armature may be lost
Solution Approach 1:
The yoke is designed to oscillate dynamically in response to external forces, maintaining the attraction state between the yoke and armature. This dynamic adjustment allows the system to absorb external forces while preserving the magnetic attraction, preventing disengagement.
Solution Approach 2:
The oscillatable yoke structure provides a cushioning mechanism that absorbs external forces before they can cause disengagement. The yoke's ability to oscillate acts as a buffer, protecting the attraction state from being lost when external forces are applied.
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 configuration enables smooth armature movement and maintains a strong attraction state between the yoke and armature, enhancing impact resistance and preventing malfunction under vibrations or impacts.
Implementation Method 1
a coil adapted to insert through at least one armature and a yoke so as to attract surfaces of the yoke and the armature which are opposed to each other, to receive a voltage, to excite for separating the surfaces of the yoke and the armature
Data Source
AI summary
An aspect of the present invention provides an electric magnet device, in which a smooth movement of an armature is ensured and, even if a vibration or an impact is applied, an attraction state between a yoke and the armature is maintained to prevent a malfunction, and a switch provided therewith, where the electric magnet device includes: a coil adapted to insert through an armature and a yoke so as to attract surfaces of the yoke and the armature, which are opposed to each other, to receive a voltage, to excite for separating the surfaces of the yoke and the armature; the armature disposed on one end side of the coil; and the yoke disposed on the other end side of the coil and adapted to oscillate, such that an oscillation angle of the yoke is greater than that of the armature.