Compact Electromagnetic Switch Design for Starter Systems
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Summary
Problems
Conventional electromagnetic switch devices for starters in large-displacement engines face challenges with increased coil resistance due to larger solenoid coil development length, leading to insufficient current supply and increased manufacturing costs, while protruding auxiliary relays compromise vehicle mountability and vibration resistance.
Innovation solutions
An electromagnetic switch device with a connector assembly formed by stamping conductive material, integrating connectors to form motor and electric circuits, and a resin member to fix these connectors, which reduces the device's size and improves assembly, mountability, and vibration resistance.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the auxiliary relay is provided with the solenoid coil wound around the outer circumference of the movable contact, then the auxiliary relay can be integrated into the electromagnetic switch device, but the development length of the coil is increased causing increased coil resistance and insufficient current supply
Why choose this principle:
The patent changes the spatial arrangement by providing the auxiliary relay in the axial direction of the movable contact rather than wrapping around its outer circumference. This dimensional change reduces the coil's development length and resistance while maintaining integration within the electromagnetic switch device structure.
Principle concept:
If the auxiliary relay is provided with the solenoid coil wound around the outer circumference of the movable contact, then the auxiliary relay can be integrated into the electromagnetic switch device, but the development length of the coil is increased causing increased coil resistance and insufficient current supply
Why choose this principle:
The patent modifies the geometric parameters of the solenoid coil by reducing its development length through the axial placement configuration. This parameter change directly addresses the coil resistance issue while preserving the auxiliary relay's current supply function.
Application Domain
Data Source
AI summary:
An electromagnetic switch device with a connector assembly formed by stamping conductive material, integrating connectors to form motor and electric circuits, and a resin member to fix these connectors, which reduces the device's size and improves assembly, mountability, and vibration resistance.
Abstract
An electromagnetic switch device for starter includes a connector assembly which has a plurality of connectors formed by stamping a conductive material and which forms a motor electric circuit and an electric circuit for supplying power to an attraction coil and a holding coil, wherein the connector assembly includes: a connector (A) connecting one of a pair of sub fixed contacts and a battery terminal; a connector (B) connecting the other one of the pair of sub fixed contacts, and one end of the attraction coil and one end of the holding coil; a connector (C) connecting the other end of the attraction coil and a motor terminal; a connector (D) connecting one end of a sub coil and an S terminal; and a resin member integrally fixing at least one pair of the connector (A), the connector (B), the connector (C), and the connector (D).