JPS6130989U

JPS6130989U - spark plug

Info

Publication number: JPS6130989U
Application number: JP11677484U
Authority: JP
Inventors: 惠民王
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-07-30
Filing date: 1984-07-30
Publication date: 1986-02-25

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例の電極部の拡大縦断面図、
第２図は第１図の電極部の下面図、第３図は本考案の第
２実施例の電極部の下面図、第４図は本考案の第３実施
例の電極部の下面図、第５図は従来の点火プラグの部分
縦断面図と部分側面図である。２・・・中心電極、２Ａ・・・中心電極放電面、３・・
・放電部、４・・・接地電極、４Ａ・・・接地電極中心
穴、４Ｂ・・・接地電極切欠部、４Ｃ・・・接地電極穴
の山形突起部、４Ｄ・・・接地電極穴の矩形突起部。FIG. 1 is an enlarged longitudinal cross-sectional view of the electrode section of the first embodiment of the present invention;
2 is a bottom view of the electrode section of FIG. 1, FIG. 3 is a bottom view of the electrode section of the second embodiment of the present invention, and FIG. 4 is a bottom view of the electrode section of the third embodiment of the present invention. FIG. 5 is a partial vertical sectional view and a partial side view of a conventional spark plug. 2... Center electrode, 2A... Center electrode discharge surface, 3...
・Discharge part, 4... Ground electrode, 4A... Ground electrode center hole, 4B... Ground electrode notch, 4C... Chevron-shaped protrusion of ground electrode hole, 4D... Rectangle of ground electrode hole protrusion.

Claims

[Scope of utility model registration request]

(1) In a spark plug having a center electrode 2 and an L-shaped ground electrode 4, the part of the ground electrode 4 facing the discharge surface 2A of the center electrode 2 is formed into an annular shape, and the center hole 4 of the annular ground electrode
A spark plug characterized in that the diameter of A is slightly larger than the diameter of center electrode 2.

(2) The spark plug according to claim 1, wherein the annular ground electrode 4 has a notch 4B.

(3) A chevron-shaped protrusion 4C in the center hole 4A of the annular ground electrode 4
Scope of claim 1 for utility model registration characterized by having
A spark plug with a spark plug.

(4) Rectangular protrusion 4 in the center hole 4A of the annular ground electrode 4
The spark plug as set forth in claim 1 of the utility model registration claim, characterized in that it has D.

(5) The spark plug according to claim 1, wherein the discharge surface 2A of the center electrode 2 has knurling notches.