Electromagnetic relay

An electromagnetic relay, comprising:

• a case having a terminal base and a cover fitted thereon;
• a pair of contact units arranged laterally on said terminal base;
• an electromagnetic unit arranged in said case on a longitudinal end of said contact units;
• an upper longitudinal insulating wall projecting from an upper inner wall surface of said cover between different ones of said contact units;
• a lower longitudinal insulating wall projecting from an inner surface of said terminal base so as to correspond to said upper longitudinal insulating wall;
• and
• an actuating member made of electrically insulating material for transmitting a drive force of an armature of said electromagnet unit to said contact units;
• a guide structure being defined between a lower end of said upper longitudinal insulating wall and an upper end of said lower longitudinal insulating wall so as to guide movement of said actuating member along a longitudinal direction as it is actuated by an armature of said electromagnet unit to actuate said contact units between two different states thereof;
• wherein said guide structure comprises a longitudinal slot provided in said actuating member to receive a free end of one of said longitudinal insulating walls;
• and
• wherein each of said contact units comprises an electrically insulated member carrying a moveable contact piece, and said actuating member is provided with a pair of lateral wings whose lower surfaces are guided by shoulder portions of said electrically insulated members.

An electromagnetic relay, comprising:

• a case having a terminal base and a cover fitted thereon;
• a pair of contact units arranged laterally on said terminal base;
• an electromagnet unit arranged in said case on a longitudinal end of said contact units;
• an upper longitudinal insulating wall projecting from an upper inner wall surface of said cover between different ones of said contact units;
• a lower longitudinal insulating wall projecting from an inner surface of said terminal base so as to correspond to said upper longitudinal insulating wall;
• and
• an actuating member made of electrically insulating material for transmitting a drive force of an armature of said electromagnet unit to said contact units;
• a guide structure being defined between a lower end of said upper longitudinal insulating wall and an upper end of said lower longitudinal insulating wall so as to guide movement of said actuating member along a longitudinal direction as it is actuated by an armature of said electromagnet unit to actuate said contact units between two different states thereof;
• wherein said guide structure comprises a slot provided in a free end of one of said longitudinal walls to receive a longitudinal ridge provided in an associated part of said actuating member;
• and
• wherein each of said contact units comprises an electrically insulated member carrying a moveable contact piece, and said actuating member is provided with a pair of lateral wings whose lower surfaces are guided by shoulder portions of said electrically insulated members.

An electromagnetic relay, comprising:

• a case having a terminal base and a cover fitted thereon;
• a pair of contact units arranged laterally on said terminal base;
• an electromagnetic unit arranged in said case on a longitudinal end of said contact units;
• an upper longitudinal insulating wall projecting from an upper inner wall surface of said cover between different ones of said contact units;
• a lower longitudinal insulating wall projecting from an inner surface of said terminal base so as to correspond to said upper longitudinal insulating wall;
• and
• an actuating member made of electrically insulating material for transmitting a drive force of an armature of said electromagnet unit to said contact units;
• and
• a guide structure being defined between a lower end of said upper longitudinal insulating wall and an upper end of said lower longitudinal insulating wall so as to guide movement of said actuating member along a longitudinal direction as it is actuated by an armature of said electromagnet unit to actuate said contact units between two different states thereof;
• further comprising a pair of intermediate terminal pieces which are securely attached to said electromagnet unit and electrically connected between a coil of said electromagnet unit and a circuit board, said intermediate terminal pieces mechanically supporting said circuit board.