Electromagnetic relay with solder flux penetration preventing structure

摘要

An electromagnetic relay has an iron core (1), an armature (2), a coil (12) wound around the iron core (1), a yoke (3), a hinge spring (6), and a joining structure. The yoke (3) is fastened rigidly to the iron core (1) and has an engaging hole (3b) and a fitting portion (3a),3d).;To prevent solder flux penetration of the electromagnetic relay, the coil bobbin (4) is formed, integral with or separate from a base block (9), and a venting portion (4c), for allowing air trapped in a center hole in the coil bobbin (4) to be vented therethrough, is formed in an upper flange (4b) of the coil bobbin (4). Therefore, sealing of the base block of the electromagnetic relay with sealant (13) can be performed smoothly and pinhole-free sealing thereof can be provided.