Patent ID: 7100426
Filing Date: 2006-09-05
Classification: G01L

Abstract:
1. A knocking sensor comprising: a cylindrical body including a cylindrical portion and a supporting flange, the supporting flange being provided at an outer circumference of a lower end of the cylindrical portion; parts including an insulating member, an electrode plate and an annular piezoelectric element arranged and fixed on the supporting flange; and a fixing member including a tubular portion which comprises a holding portion protruding from an outer circumference of the tubular portion and is formed to insert into the cylindrical portion from an upper end of the cylindrical portion, the holding portion being elastically deformable to hold the parts, wherein the fixing member is fixed in the cylindrical portion by inserting the tubular portion of the fixing member into the cylindrical portion from the upper end of the cylindrical portion, and wherein the parts are clamped and fixed between the supporting flange and the holding portion by holding the parts elastically with the holding portion, while the fixing member is fixed in the cylindrical portion.