Patent ID: 9437375
Filing Date: 2016-09-06
CPC Classification: H01H

Claim Text:
1. An electromagnetic relay assembly comprising: a housing; an electromagnetic unit disposed in said housing and including a magnetic spool, a coil wound on said magnetic spool, and an armature pivotally disposed on said magnetic spool; a switch assembly including first and second conductive plates mounted to said housing, and a switching unit disposed in said housing to switch said first and second conductive plates between electrically connected and disconnected states; and a switch control unit disposed between said switching unit and said armature, and including a sliding member that is slidably disposed in said housing to move between first and second positions, and a locking member, said sliding member being connected to said switching unit and having a guide groove formed with a first locking site and a second locking site, and an elongate opening spaced apart from said guide groove, said locking member being movably mounted to said housing; and having a locking portion that is inserted into said guide groove to move between said first and second locking sites, and a pivot portion inserted movably into said elongate opening; wherein said guide groove is annular and has a groove wall along which said locking portion slides, said groove wall being formed with a plurality of inclined tooth-like portions that are arranged annularly, each of said inclined tooth-like portions having a slanting surface and a shoulder surface adjoining said slanting surface of an adjacent one of said inclined tooth-like portions, each of said first and second locking sites being situated on said shoulder surface of one of said inclined tooth-like portions; wherein said switch control unit further includes a retaining plate that urges said locking portion to contact against said groove wall; wherein said switching unit provides a resilient force to push said sliding member to the first position and to place said locking portion in said first locking site such that said sliding member is locked in the first position where said switching unit switches said first and second conductive plates to the electrically disconnected state; and wherein, when said coil is energized, said sliding member is moved by said armature to the second position, and said locking portion is placed in said second locking site such that said sliding member is locked in the second position where said switching unit is actuated by said sliding member to switch said first and second conductive plates to the electrically connected state.