JPS61199867U

JPS61199867U -

Info

Publication number: JPS61199867U
Application number: JP8254285U
Authority: JP
Priority date: 1985-06-03
Filing date: 1985-06-03
Publication date: 1986-12-13

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例によるボタン型ア
ルカリ電池の封口構造を示す部分断面図、第２図
は第１図における封口ガスケツトの単品形状を示
す詳細図、第３図は従来のボタン型アルカリ電池
の封口構造を示す部分断面図である。１０……正極缶（金属製電池ケース）、１８…
…負極端子板（皿状蓋）、１８ａ……外周縁部、
１８ｂ……平面部、１８ｃ……曲面傾斜部、２０
……封口ガスケツト、２０ａ……円筒壁部、２０
ｂ……座部、２０ｃ……環状突起。 Fig. 1 is a partial sectional view showing the sealing structure of a button-type alkaline battery according to an embodiment of this invention, Fig. 2 is a detailed view showing the shape of the sealing gasket in Fig. 1, and Fig. 3 is a conventional button-type alkaline battery. FIG. 2 is a partial cross-sectional view showing a sealing structure of an alkaline battery. 10... Positive electrode can (metal battery case), 18...
... Negative terminal plate (dish-shaped lid), 18a ... outer peripheral edge,
18b...Plane part, 18c...Curved inclined part, 20
...Sealing gasket, 20a...Cylindrical wall part, 20
b... seat, 20c... annular projection.

Claims

[Scope of Claim for Utility Model Registration] (1) A synthetic resin annular sealing gasket is fitted to the inner periphery of the open end of the cylindrical part of the metal battery case,
A metal dish-shaped lid is fitted to the inner periphery of the sealing gasket, and the open end of the battery case is curled inward so that the sealing gasket is compressed between the battery case and the dish-shaped lid. A sealing structure for a dry cell battery comprising: a cylindrical wall portion disposed along the inner peripheral surface of the open end of the battery case; and an annular protrusion provided on the inner circumferential surface near the upper end of the cylindrical wall, the annular protrusion connecting the outer circumferential edge of the dish-shaped lid and the flat surface. A sealing structure for a dry battery, characterized in that the annular protrusion is in pressure contact with the outer surface of the curved inclined portion, and the upper and lower adjacent portions of the annular protrusion are not in pressure contact with the dish-shaped lid. (2) The dry battery sealing structure according to claim 1, wherein the protrusion amount of the annular projection is 10 to 20% of the thickness of the cylindrical wall.