Contactor Width Reduction via Coil Bobbin Dimensional Shift
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Solution Overview
Problem
Existing contactors with widths of 45 millimeters are unsuitable for narrow installation spaces due to their large size.
Innovation Solution
A contactor design with a housing comprising side plates, a static iron core, a movable iron core, a coil bobbin, and an elastic device, where the coil bobbin has fixing parts connected to the side plates and an auxiliary wiring module, allowing for a narrower width and efficient space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the contactor uses a traditional wide structure, then the electromagnetic mechanism can function properly, but the installation space requirement increases
Solution Approach 1:
The patent repositions the coil bobbin fixing parts from a horizontal arrangement (increasing width) to a vertical arrangement along the length direction. The first and second fixing parts are positioned at opposite ends of the coil bobbin in the length direction, allowing the contactor to achieve stable electromagnetic function while reducing the width dimension to 36mm, thus solving the space constraint problem.
2Area of stationary object
If the coil bobbin width is reduced to fit narrow spaces, then installation space is saved, but the fixing stability may be compromised
Solution Approach 1:
The patent compensates for the reduced width by extending the fixing parts along the length dimension. The first fixing part is positioned at one end of the coil bobbin and the second fixing part at the other end, both extending in the length direction. This dimensional redistribution maintains fixing stability while achieving a compact 36mm width for narrow space installation.
Solution Approach 2:
The first and second fixing parts are pre-positioned at opposite ends of the coil bobbin in the length direction, creating a stable fixing structure before installation. This preliminary arrangement ensures that when the contactor is installed in narrow spaces, the coil bobbin remains securely fixed despite the reduced width dimension.
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 contactor achieves a narrower width of 36 millimeters, making it suitable for narrow installations while maintaining functionality in connecting and disconnecting circuits.
Implementation Method 1
when the coil of the contactor is energized, a strong magnetic field is created, such that the static iron core generates a magnetic force to attract the movable iron core
Implementation Method 2
The movable iron core is released under the action of the spring, causing the contacts to recover
Data Source
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AI summary
The present utility model provides a contactor, comprising: a housing, including a first side plate and a second side plate disposed opposite to each other; a static iron core and a movable iron core located inside the housing, a coil bobbin fitted on the static iron core, a coil wound on the coil bobbin, an elastic device located between the coil bobbin and the movable iron core, and a moving contact and a static contact disposed opposite to each other, wherein the coil bobbin includes a contact end surface facing the movable iron core and a first fixing part and a second fixing part fixed to edges of the contact end surface, length directions of the first fixing part and the second fixing part are parallel to the first side plate and the second side plate, the first fixing part is in contact with and connected to the first side plate, and the second fixing part is in contact with and connected to the second side plate. The contactor according to the present utility model has a narrower width and saves installation space.