Title:
ノックセンサ
Document Type and Number:
Japanese Patent JP3983755
Kind Code:
B2
Abstract:
A stacked body constituted by a first insulating sheet, a first terminal plate, a piezoelectric element, a second terminal plate, a second insulating sheet, a weight, and a disk spring is fitted over a cylindrical portion of a base, clamped and held between a nut and a flange portion of the base, and resin-molded. Annular partial electrodes having a width narrower than a radial width of the piezoelectric element are formed on front and rear surfaces of the piezoelectric element. The first and second terminal plates have annular portions formed so as to have annular shapes having an outside diameter and an inside diameter substantially equal to those of the partial electrodes, and are stacked such that the annular portions are placed in close contact with entire surfaces of the partial electrodes.
Inventors:
Shibata Osamu
Yokoi Akito
Masao Takahashi
Yokoi Akito
Masao Takahashi
Application Number:
JP2004286916A
Publication Date:
September 26, 2007
Filing Date:
September 30, 2004
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
G01L23/22; F02D35/00
Domestic Patent References:
| JP2003517597A | ||||
| JP2002055013A | ||||
| JP2001041969A | ||||
| JP3259750A | ||||
| JP2002048634A | ||||
| JP2003017776A |
Attorney, Agent or Firm:
Michiteru Soga
Michiharu Soga
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order
Michiharu Soga
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order