Electromagnetic Relay Press-Fitting Adjustment
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Solution Overview
Problem
Conventional electromagnetic relays require plastic deformation of fixed contact supports for adjusting operation characteristics, leading to low productivity and yield due to dispersion in component and assembly accuracy.
Innovation Solution
An electromagnetic relay design where operation characteristics are adjusted through a press-fitting amount of a fixed contact terminal into a spool of the electromagnet block, allowing for simultaneous assembly and adjustment, thereby improving productivity and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If plastic deformation of fixed contact supports is performed for adjusting operation characteristics, then operation characteristics can be adjusted, but productivity and yield decrease due to troublesome adjustment process and dispersion in component accuracy
Solution Approach 1:
The patent combines the assembly process and operation characteristics adjustment process into a single press-fitting operation. The fixed contact terminal is press-fitted into the spool with a specifically controlled press-fitting amount that simultaneously achieves both assembly and adjustment of operation characteristics, eliminating the need for separate plastic deformation adjustment steps and thereby improving productivity
Solution Approach 2:
The patent changes the adjustment parameter from plastic deformation (conventional method) to press-fitting amount (new method). By controlling the press-fitting amount during assembly, the operation characteristics are adjusted without requiring subsequent plastic deformation operations, reducing process complexity and improving both productivity and yield
2Manufacturing precision
If plastic deformation of fixed contact supports is performed for adjusting operation characteristics, then operation characteristics can be adjusted, but yield decreases due to dispersion in component and assembly accuracy
Solution Approach 1:
The patent performs the adjustment action during the assembly process itself rather than as a subsequent operation. The press-fitting operation preliminarily sets the operation characteristics in the correct range through controlled press-fitting amount, eliminating the need for post-assembly plastic deformation adjustment and reducing the impact of accuracy dispersion on yield
Solution Approach 2:
The patent changes the adjustment parameter from plastic deformation to press-fitting amount, which can be more precisely controlled and measured. This parameter change allows for better consistency in adjustment results and reduces dispersion, thereby improving yield
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 approach enables high productivity and good yield by allowing for easy adjustment of operation characteristics without the need for precise dimensional accuracy in internal components, resulting in an electromagnetic relay with improved alignment accuracy and reduced dispersion.
Implementation Method 1
a movable iron piece configured to rotate based on magnetization and demagnetization of an electromagnet block
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
This invention provides an electromagnetic relay capable of easily adjusting operation characteristics and having high productivity and good yield. The electromagnetic relay is one in which a movable touch piece is rotated by a movable iron piece configured to rotate based on magnetization and demagnetization of an electromagnet block, to make a movable contact that is provided on the movable touch piece come into contact with and separate from a fixed contact opposed to the movable contact. In particular, operation characteristics are made adjustable by means of a press-fitting amount at the time of press-fitting each of normally open / normally closed fixed contact terminals provided with normally open / normally closed fixed contacts into a spool of the electromagnet block along a moving direction of the movable contact.