JPS6230284Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a button type battery such as a silver oxide battery, and particularly to a gasket for sealing between a sealing plate and a battery container.

1 to 3 are diagrams showing the structure and assembly of a conventional battery of this type. A molded anode 2, which also serves as an anode terminal, is inserted into the bottom of the battery container 1, and a separator 3 and a liquid absorbent 4 are sequentially inserted and placed thereon.

Apart from this, a cylindrical part 8 made of synthetic resin,
A sealing plate 7 which also serves as a cathode terminal is connected to a gasket 5 having a substantially L-shaped vertical cross section, which is integrally provided with a horizontal ring part 9 extending radially inward from the lower end of the cylindrical part 8.
Fits around the outer periphery of the Then, with the lower opening of the sealing plate 7 facing upward, predetermined amounts of zinc powder and alkaline electrolyte are respectively put into the sealing plate 7 to form a cathode agent 6. Sealing plate 7
has an upper surface part 10 and an outer peripheral part 11, and the upper surface part 1
A step of about one or two steps is provided between the gasket 5 and the outer peripheral part 11, and the outer peripheral part 11 is connected to the gasket 5.
It is fitted inside the cylindrical part 8 of.

As shown in FIG. 2, the battery container 1 loaded with the anode 2 and the like is fitted into the sealing plate 7 with the gasket 5 externally fitted and the cathode 6 filled with the opening facing down. Then, by curling the open end of the battery container 1 inward, the gasket 5 is compressed and the battery is sealed.

In this conventional button-type battery, as shown in FIG.
It is designed to be larger than 2. Therefore, when a large number of sealing plates 7 with gaskets 5 fitted on the outside are sequentially supplied to the battery assembly line by a parts feeder, the third
As shown in the figure, an adjacent gasket 5 fits into the upper surface 10 of the sealing plate 7, and the sealing plates 7 often overlap each other. When this happens, the sealing plate 7
supply channels become clogged, which requires the flow of battery assembly lines to be stopped, resulting in a decrease in productivity.

In order to improve this, it is conceivable to make the diameter D1 of the opening of the horizontal ring part 9 in the gasket 5 smaller than the outer diameter D2 of the upper surface part 10 in the sealing plate 7. However, if the entire horizontal ring portion 9 is extended, the diameter D
Reducing 1 is not preferable in terms of battery performance because it will drastically reduce the filling amount of the cathode material 6, the amount of electrolyte held in the liquid absorber 4, the reaction area, etc.

An object of the present invention is to provide a button-type battery that eliminates the drawbacks of the prior art described above, suppresses deterioration of battery performance as much as possible, and eliminates overlapping of sealing plates.

To achieve this objective, the present invention provides a gasket with a relatively large diameter hole in the center of the horizontal ring.
The present invention is characterized in that two openings are formed, and a protrusion is provided on the periphery of the opening to prevent the protruding upper surface portion formed on the sealing plate from being inserted into the opening.

Next, an embodiment of the present invention will be described with reference to the drawings. 4 to 6 are diagrams showing a first embodiment of the present invention. Since the overall configuration and assembly order of the button type battery are the same as those of the conventional battery described above, a description thereof will be omitted.

In the case of this embodiment, one or more protrusions 12 extending inward are provided on the inner circumference of the horizontal ring part 9 in the gasket 5, and the shape of the lower opening of the horizontal ring part 9 is irregular. It is circular. and the fifth
As shown in the figure, the diameter D3 of the virtual circle C inscribed in this non-circular opening is designed to be smaller than the outer diameter D2 of the upper surface portion 10 of the sealing plate 7.

7 and 8 are diagrams showing a gasket 5 according to a second embodiment of the present invention. In the case of this embodiment, the horizontal ring portion 9 of the gasket 5 is located at E in the figure.
A plurality of inwardly extending protrusions 12 are provided in the virtual circle represented by , and the lower opening of the horizontal ring part 9 has a hexagonal shape. The diameter of the above virtual circle E is
Although it is designed to be larger than the outer diameter D2 of the upper surface part 10 of the sealing plate 7, the diameter D3 of the virtual circle C inscribed in the hexagonal opening is designed to be smaller than the outer diameter D2 of the upper surface part 10.

In the present invention, the reason why the protrusion 12 is provided on the horizontal ring portion 9 of the gasket 5 and the opening thereof is made polygonal is to prevent the sealing plates 7 from overlapping each other as described above. Therefore, to the extent that overlapping can be prevented, reducing the number of protrusions 12, increasing the diameter D3 of the imaginary circle C, or decreasing the number of corners in the case of a polygon will reduce the deterioration of battery performance. This can be suppressed as much as possible.

As mentioned above, according to the present invention, it is possible not only to suppress the deterioration of battery performance as much as possible, but also to prevent the sealing plates from overlapping each other during the assembly process. We can provide batteries.

[Brief explanation of the drawing]

Figure 1 is a partially cut-away front view of a conventional button-type battery, Figure 2 is a partially cut-away front view showing the assembled state of the battery, and Figure 3 is a partially cut-away front view of the battery during its assembly process. A diagram for explaining the overlapping of the sealing plates, FIG. 4 is a partially sectional front view of a button-type battery according to the first embodiment of the present invention, and FIGS. 5 and 6 are gaskets used in the battery. FIGS. 7 and 8 are a plan view and a sectional view of a gasket according to a second embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Battery container, 5... Gasket, 7... Sealing plate, 8... Cylindrical part, 9... Horizontal ring part, 10...
Upper surface part, C...virtual circle, D2...outer diameter of the upper surface part of the sealing plate, D3...diameter of the virtual circle.

Claims (1)

[Scope of utility model registration request] A gasket having a substantially L-shaped vertical cross section, which integrally includes a cylindrical part and a horizontal ring part extending radially inward from the lower end of the cylindrical part, the gasket having a protruding upper surface part. In a button type battery which is interposed in a sealed state between the outer periphery of a plate and the inner periphery of a battery container, one relatively large diameter opening is bored in the center of the horizontal ring part of the gasket, A button-type battery, characterized in that a protrusion is provided on the peripheral edge of the opening to prevent the upper surface of the sealing plate from being inserted into the opening.