JPS62167392U

JPS62167392U -

Info

Publication number: JPS62167392U
Application number: JP5546086U
Authority: JP
Priority date: 1986-04-15
Filing date: 1986-04-15
Publication date: 1987-10-23

Description

[Brief explanation of the drawing]

第１図は、この考案の実施例の断面図であり、
第２図と第３図イ，ロはその他の実施例の断面図
である。１……点火プラグ、２……段座、３……発火部
、４……シリンダーヘツド、５……スリーブ、６
……ねじ部、８……プラグ孔、９……外側電極、
１０……先端脚部、１１……座面、１２……大径
胴部、１３……コルゲーシヨン、１４……突出部
、１９……肩部、２０……貫通孔。 FIG. 1 is a sectional view of an embodiment of this invention,
2 and 3A and 3B are sectional views of other embodiments. 1... Spark plug, 2... Step seat, 3... Ignition part, 4... Cylinder head, 5... Sleeve, 6
...Threaded part, 8...Plug hole, 9...Outer electrode,
10... Tip leg portion, 11... Seat surface, 12... Large diameter trunk, 13... Corrugation, 14... Projection, 19... Shoulder, 20... Through hole.

Claims

[Claims for Utility Model Registration] (1) In addition to holding the center electrode inside the shaft hole, the ignition leg is exposed inside the combustion chamber, and the insulator has a large-diameter body approximately in the center and a corrugation at the rear end. , the cylinder head is fitted into a plug hole which has a small diameter hole at the tip that penetrates into the combustion chamber via a step seat, and a large diameter hole provided with a female thread, and the seat surface of the body of the insulator is inserted into the step seat of the plug hole. A spark plug mounting structure comprising: a sleeve that locks and has a male thread on the outside; the sleeve is screwed into the plug hole; and the shoulder of the insulator body is pressed by the sleeve. (2) The above insulator body is made of Al, Fe. , a mounting structure for a spark plug according to claim 1, which is coated with Cu metal. (3) The spark plug mounting structure according to claim 1 or 2, wherein an annular outer electrode member is fitted to the inner circumference of the tip of the plug hole. (4) The spark plug according to claim 1 or 2 of the utility model registration claim, wherein an outer electrode material having a projecting piece extending into the combustion chamber is fitted to the inner wall of the stepped seat of the plug hole. Mounting structure.