ELECTROMAGNETIC RELAY WITH PRESSURE SPRING

摘要

The electromagnetic relay (10) has a motor assembly (12) with a bobbin (14) secured to a housing (31). A core (22) is adjacently connected below the bobbin (14) except for a core end (24), which extends from the bobbin (4). An armature end (36, 38) magnetically engages the core end (24) when the coil (18) is energized. An actuator (44) engages the armature (34) and a plurality of center contact spring assemblies (52). The center contact spring assembly is comprised of a center contact spring (54) which is not pre bent and is ultrasonically welded onto a center contact terminal (56). A normally open spring (70) is positioned relatively parallel to a center contact spring (54). The normally open spring (70) is ultrasonically welded onto a normally open terminal (76) to form a normally open outer contact spring assembly (68). A normally closed outer contact spring (90) is vertically positioned with respect to the center contact spring (54) so that the normally closed outer contact spring assembly (84) is in contact with the center contact spring assembly (52), when the center contact spring (54) is not being acted upon by the actuator (44). The normally closed spring (90) is ultrasonically welded onto a normally closed terminal (88) to form a normally closed assembly (84). A pressure spring (100) pressures the center contact spring (54) above the actuator (44) when the actuator (44) is not in use.