Spark plug and manufacturing method thereof

• Main Authors: LI YAO, YANG HUIMU
• Format: Patent
• Language: Chinese; English
• Published: 24.07.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CORONA DEVICES; ELECTRICITY; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARK GAPS; SPARKING PLUGS

The invention discloses a spark plug and a manufacturing method thereof. The spark plug comprises an insulator, a wiring screw, a central electrode, side electrodes and a shell. The insulator is provided with a stepped hole along the axis direction; at least one part of the central electrode is inserted into the front end side of the stepped hole; the wiring screw is provided with a terminal partand a rod-shaped part, and the rod-shaped part is inserted into the stepped hole of the insulator; the length of the rod-shaped part of the wiring screw extending into the insulator along the axis direction is less than 35mm, and a rod-shaped connecting piece is arranged between the front end of the rod-shaped part and the central electrode; the length of the rod-shaped part of the wiring screw isreduced by increasing the rod-shaped connecting piece, and the connection between the wiring screw and the central electrode is ensured. According to the invention, the rod-shaped part of the screw is limited below 35mm, and