Electromagnetic Relay Guard Portion Alignment
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Solution Overview
Problem
Conventional electromagnetic relays are unable to effectively utilize inner space, leading to inefficiencies and larger size due to the alignment of the base and body receiving portions within the casing.
Innovation Solution
The electromagnetic relay design features an electromagnet block with a spool wound coil and iron core mounted on the base, where guard portions on the spool are held between the base and casing, allowing for precise alignment and efficient use of space, with engaging receiving portions and position-regulating projections to ensure accurate assembly and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the base receiving portion and the body receiving portion are projectingly provided in the casing to align the coil bobbin, then the alignment accuracy is improved, but the inner space for arranging the electromagnet portion cannot be ensured and the device size cannot be reduced
Solution Approach 1:
The patent changes the alignment mechanism from using projecting portions extending into the inner space to using recesses formed in the inner wall surfaces of the casing. This dimensional change allows alignment features to be located on the boundary surfaces rather than occupying internal volume, thereby maintaining alignment accuracy while preserving inner space for the electromagnet portion.
Solution Approach 2:
The patent uses recesses in the casing inner wall that correspond to and receive the guard portions of the spool. This creates a complementary fitting relationship where the alignment function is achieved through the negative space (recess) rather than positive projecting features, effectively using the casing wall itself as the alignment reference without encroaching on internal space.
2Volume of moving object
If the guard portions are held between the base and the casing, then the space utilization is improved and device size is reduced, but the alignment accuracy and supporting strength must be maintained
Solution Approach 1:
The patent nests the guard portions of the spool within recesses formed in the inner wall surfaces of the casing. The guard portions fit into these recesses, creating a nested relationship where the alignment features are contained within the casing wall structure itself. This nesting approach maintains precise alignment while maximizing the use of available space within the device envelope.
Solution Approach 2:
The patent provides recesses at specific locations on the inner wall surfaces of the casing where alignment is needed, rather than using a uniform structure throughout. This localized approach to creating alignment recesses ensures precise positioning of the electromagnet block where required, while maintaining overall space efficiency in the device design.
3Strength
If the guard portions are held between the base and the casing, then the supporting strength is improved, but wrong assembly must be prevented
Solution Approach 1:
The patent employs asymmetric positioning of the recesses in the casing inner wall relative to the guard portions of the spool. This asymmetric arrangement creates a unique fitting relationship that allows correct assembly in only one orientation, thereby preventing wrong assembly. The asymmetric design maintains strong supporting strength through the recess-guard portion fitting while ensuring assembly correctness through its non-symmetric geometry.
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 results in a smaller-sized electromagnetic relay with improved alignment accuracy and supporting strength, preventing wrong assembly and allowing for adjustments in operation characteristics, thereby optimizing space usage and manufacturing efficiency.
Implementation Method 1
an electromagnet block, formed by inserting an iron core through a through hole of a spool wound with a coil
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
This invention provides an electromagnetic relay which can be reduced in size by effectively using an inner space in a housing thereof. The electromagnetic relay is one in which an electromagnet block, formed by inserting an iron core through a through hole of a spool wound with a coil, is mounted on the upper surface of a base such that a shaft center of the iron core is in parallel with the base, and a casing is fitted to the base to cover the electromagnet block. In particular, the electromagnetic relay is structured to hold guard portions, provided on both sides of the spool, between the base and the casing.