JPH0323367U

JPH0323367U -

Info

Publication number: JPH0323367U
Application number: JP8358889U
Authority: JP
Priority date: 1989-07-18
Filing date: 1989-07-18
Publication date: 1991-03-11
Anticipated expiration: 2004-07-18
Also published as: JPH0650774Y2

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示す断面図、第
２図は配線シートを展開した状態を示す平面図、
第３図は配線シートを折曲した状態を示す正面図
、第４図は従来の水中加速度計を示す断面図であ
る。１……金属ケース、１ａ……ネジ溝、２……電
極、２ａ……段部、３……圧電子、３ａ……プラ
ス極面、３ｂ……マイナス極面、４……付加質量
部材、５……蓋押えネジ、６……ケーブル、７…
…リード線、１０……配線シート、１３……銅箔
（導電箔）。 Fig. 1 is a sectional view showing an embodiment of this invention, Fig. 2 is a plan view showing the wiring sheet in an expanded state;
FIG. 3 is a front view showing the wiring sheet in a bent state, and FIG. 4 is a sectional view showing a conventional underwater accelerometer. DESCRIPTION OF SYMBOLS 1...Metal case, 1a...Thread groove, 2...Electrode, 2a...Step part, 3...Piezoelectric, 3a...Positive pole surface, 3b...Minus polar surface, 4...Additional mass member, 5...Lid holding screw, 6...cable, 7...
... Lead wire, 10 ... Wiring sheet, 13 ... Copper foil (conductive foil).

Claims

[Scope of Claim for Utility Model Registration] A bottomed cylindrical metal case with a threaded groove on the inner circumferential surface of the opening, a disc-shaped electrode with steps on both sides of the periphery, and a periphery of the electrode that is the same from both sides. Two ring-shaped disk-shaped piezoelectric elements are disposed in a metal case, each sandwiched in polarity, positioned by a step on the periphery, and one of which is in contact with the inner surface of the bottom of the case. , a cylindrical mass adding member disposed within the metal case and disposed on the other piezoelectric element that does not contact the inner surface of the bottom of the case, and the free end of the mass adding member is fitted with the inner surface of the center portion,
An underwater acceleration device comprising a lid retaining screw screwed into a thread groove of a metal case, and a cable having lead wires passing through the lid retaining screw and respectively connected to two polarities of two piezoelectric elements in the metal case. In the meter, one side of a glasses-shaped wiring sheet consisting of a conductive foil soldered onto the surface of a flexible and insulating thin film is connected to the bottom of the case so that the conductive foil contacts the piezoelectric element. The other side of the wiring sheet is interposed between the additional mass member and the piezoelectric element so that its conductive foil contacts the piezoelectric element, and one of the lead wires of the cable is connected to the electrode in the case. An underwater accelerometer characterized in that the other lead wire is connected to a conductive foil of a wiring sheet.