JPS6329875U

JPS6329875U -

Info

Publication number: JPS6329875U
Application number: JP12289786U
Authority: JP
Priority date: 1986-08-12
Filing date: 1986-08-12
Publication date: 1988-02-26

Description

[Brief explanation of drawings]

第１図は本考案の第１の実施例を示す断面図、
第２図は第１図の要部拡大図、第３図は本考案の
第２の実施例を示す断面図、第４図は第３図の要
部拡大図、第５図は第３図の要部斜視図である。１……圧電素子内蔵点火プラグ、３……圧力検
出器、１０……絶縁碍子、２……主体金具、３３
……圧電素子、３２，４２……導電体。 FIG. 1 is a sectional view showing a first embodiment of the present invention;
Fig. 2 is an enlarged view of the main part of Fig. 1, Fig. 3 is a sectional view showing the second embodiment of the present invention, Fig. 4 is an enlarged view of the main part of Fig. 3, and Fig. 5 is the main part of Fig. 3. FIG. 1... Spark plug with built-in piezoelectric element, 3... Pressure detector, 10... Insulator, 2... Metal shell, 33
... Piezoelectric element, 32, 42 ... Conductor.

Claims

[Scope of utility model registration request]

An insulator, a metal shell attached around the insulator, and a piezoelectric element provided in a space surrounded by an inner wall surface of the metal shell and a surface of the insulator with one electrode grounded to the metal shell. In the spark plug, a gap is provided between the inner edge of the upper end of the metal shell and the insulator, one end is connected to the other electrode of the piezoelectric element, and the other end reaches the outside of the space through the gap, and A spark plug with a built-in piezoelectric element, characterized in that a conductor is provided insulated from the metal shell so as to cover the surface of an insulator.