JP2008084674A - Manganese dry cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manganese dry cell of a low cost having superior preservation characteristics even when a paper cylinder is used for the armor member. <P>SOLUTION: The manganese dry battery is equipped with a negative electrode zinc can, a separator arranged inside the negative electrode zinc can, a positive electrode binder arranged inside the separator, a positive electrode carbon rod, flange paper which has a hole to insert the positive electrode carbon rod in the center part and which covers the upper face of the positive electrode binder, a sealing body which has a hole to insert the positive electrode carbon rod in the center part and which seals an opening of the negative electrode zinc can, and the outer armor member consisting of the paper cylinder arranged outside the negative electrode zinc can. The sealing body has a first annular protruding part in an outer peripheral part of a face of the negative electrode zinc can side. In the opening end part of the negative electrode zinc can, its outside side face contacts an inside side face of the first annular protruding part and is arranged by pressing the first annular protruding part to the outside. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a manganese dry battery using a paper tube as an exterior member.

Conventionally, in a manganese dry battery, a metal can is generally used as an exterior member in order to ensure storage stability and leakage resistance.
An example of a manganese dry battery using a metal can as a conventional exterior member is shown in FIG. As shown in FIG. 6, a separator 7 and a bottom paper 9 are arranged inside the negative electrode zinc can 4, a positive electrode mixture 6 is inserted inside the separator 7, and a positive electrode carbon rod 2 is inserted into the center portion. The upper surface of the positive electrode material mixture 6 is covered with the paper 10 provided with the. And the positive electrode carbon rod 2 is inserted in the center part. A negative electrode terminal plate 18 is disposed below the negative electrode zinc can 4, and a positive electrode terminal plate 21 is disposed above the negative electrode zinc can 4. The outer surface of the negative electrode zinc can 4 is covered with a heat-shrinkable tube 15, and the outer surface is further covered with a metal can 16.

  A sealing body 23 shown in FIG. 7 made of a thermoplastic resin such as polyethylene is disposed in the opening of the negative electrode zinc can. The positive electrode carbon rod 2 is inserted into the hole 3d of the sealing body 23 to hold both firmly and airtightly, and the opening end portion of the negative electrode zinc can 4 is bitten into the sealing body 3 so that the both are fitted. Further, a sealing agent 11 such as asphalt or polybutene is applied to a portion where the sealing body 23 holds the positive electrode carbon rod 2 and a portion where the sealing body 23 is fitted to the negative electrode zinc can 4.

  Here, FIG. 8 is a fragmentary cross-sectional view of the sealing portion of FIG. As shown in FIG. 8, the upper end portion of the metal can 16 is bent inward, and the peripheral edge portion of the positive terminal plate 21 disposed on the upper surface of the sealing body 23 is tightened via the insulating ring 17. Further, the lower end portion of the metal can 16 is bent inward, and the peripheral portion of the negative electrode terminal plate 18 disposed on the bottom surface of the negative electrode zinc can 4 is connected to the lower end portion of the heat shrinkable tube 15 and the seal ring 14. Tightened. In this way, the opening of the negative electrode zinc can 4 is sealed with the sealing body 23.

Conventionally, in order to reduce the material cost, it has been proposed to use a paper tube instead of a metal can for the exterior member (for example, Patent Document 1). And since the manganese dry battery which used the paper cylinder for such an exterior member is cheap, it has spread in regions, such as China and Africa.
An example of a manganese dry battery using a paper tube as a conventional exterior member is shown in FIG. As shown in FIG. 9, a separator 7 and a bottom paper 9 are arranged inside the negative electrode zinc can 4, a positive electrode mixture 6 is inserted inside the separator 7, and a positive electrode carbon rod 2 is inserted into the center portion. The upper surface of the positive electrode material mixture 6 is covered with the paper 10 provided with the. And the positive electrode carbon rod 2 is inserted in the center part. A negative electrode terminal plate 8 is disposed under the negative electrode zinc can 4, and a positive electrode terminal plate 1 is disposed above the negative electrode zinc can 4. The outer surface of the negative electrode zinc can 4 is covered with a paper tube 5.

  Then, the positive electrode carbon rod 2 is inserted into the hole 3d of the sealing body 23 made of a thermoplastic resin such as polyethylene to hold both firmly and airtightly, and the opening end of the negative electrode zinc can 4 is bitten into the sealing body 23. Are fitted together. Further, a sealing agent 11 such as asphalt or polybutene is applied to a portion where the sealing body 23 holds the positive electrode carbon rod 2 and a portion where the sealing body 23 is fitted to the negative electrode zinc can 4.

  The upper end portion of the paper tube 5 is bent inward together with the peripheral portion of the positive electrode terminal plate 1 so as to wind up the peripheral portion of the positive electrode terminal plate 1 disposed on the upper surface of the sealing body 23. Further, the lower end portion of the paper tube 5 is bent inward together with the peripheral portion of the negative electrode terminal plate 8 so as to wind up the peripheral portion of the negative electrode terminal plate 8 disposed on the bottom surface of the negative electrode zinc can 4. In this way, the opening of the negative electrode zinc can 4 is sealed with the sealing body 23.

  The manganese dry battery of FIG. 9 using the paper tube 5 as the exterior member is similar to the manganese dry battery of FIG. 6 using the metal can 16 as the exterior member, and the constituent members are the seal ring 14, the insulating ring 17, and the heat shrinkable tube. Since 15 is not used, it is less expensive than a manganese dry battery using a metal can 16. Further, since the paper cylinder 5 is used instead of the metal can 16 as the exterior member, there are advantages such as being inexpensive and friendly to the environment.

However, the manganese dry battery of FIG. 9 using the paper tube 5 as the exterior member is sealed by tightening from above and below at the upper and lower ends of the metal can 16 like the manganese dry battery of FIG. 6 using the metal can 16. Has no structure. For this reason, in the manganese dry battery using the paper tube 5, compared to the manganese dry battery using the metal can 16, the tightening force from the vertical direction is weak, and the opening end of the negative electrode zinc can 4 is located above the lower surface of the sealing body 23. It is difficult to ensure a sufficient sealing property only by biting in. For this reason, the manganese dry battery using a paper tube as the exterior member has a problem that the storage characteristics are inferior to the manganese dry battery using a metal can as the exterior member.
JP 52-128526 A

  Therefore, in order to solve the above-described conventional problems, an object of the present invention is to provide a low-cost manganese dry battery having excellent storage characteristics even when a paper tube is used as an exterior member.

  The present invention includes a negative electrode zinc can, a separator disposed inside the negative electrode zinc can, a positive electrode mixture disposed inside the separator, a positive carbon rod, and a hole for inserting the positive carbon rod in a central portion. And a paper covering the upper surface of the positive electrode mixture, a sealing body having a hole for inserting the positive carbon rod in the center and sealing the opening of the negative electrode zinc can, and an outer side of the negative electrode zinc can A manganese dry battery having an exterior member made of a paper tube, wherein the sealing body has a first annular protrusion on its lower side, and the open end of the negative electrode zinc can The first annular projection is in contact with the inner side surface of the first annular projection and presses the first annular projection outward.

The sealing body further includes a second annular projection provided inside the first annular projection, and the negative electrode is provided between the first annular projection and the second annular projection. It is preferable that the opening end portion of the zinc can is fitted, and a sealant is applied between the first annular protrusion and the second annular protrusion.
The sealing body further includes a third annular protrusion provided in the vicinity of the positive electrode carbon rod inside the second annular protrusion, and the positive electrode carbon rod and the third annular protrusion are It is preferable that a sealing agent is applied between them.

  According to the present invention, it is possible to provide a low-cost manganese dry battery having excellent storage characteristics even when a paper tube is used as an exterior member.

(Embodiment 1)
A manganese dry battery of the present embodiment according to the present invention is shown in FIG. FIG. 1 is a front view with a cross section of a part of a manganese dry battery according to Embodiment 1 of the present invention.
As shown in FIG. 1, the separator 7 and the bottom paper 9 are arranged inside the negative electrode zinc can 4, the positive electrode mixture 6 is inserted inside the separator 7 and the bottom paper 9, and the positive electrode carbon rod 2 is inserted in the center part. The upper surface of the positive electrode mixture 6 is covered with a paper 10 provided with holes to be formed. And the opening part of the negative electrode zinc can 4 is sealed by the sealing body 3 in the state by which the positive electrode carbon rod 2 was inserted in the center part. And the outer surface of the negative electrode zinc can 4 is covered with the paper cylinder 5 which is an exterior member.

  The upper end portion of the paper tube 5 is bent inward together with the peripheral portion of the positive electrode terminal plate 1 so as to wind up the peripheral portion of the positive electrode terminal plate 1 disposed on the upper surface of the sealing body 3. Further, the lower end portion of the exterior member 5 is bent inward together with the peripheral portion of the negative electrode terminal plate 8 so as to wind up the peripheral portion of the negative electrode terminal plate 8 disposed on the bottom surface of the negative electrode zinc can 4. In this way, by tightening from above and below, the open end of the negative electrode zinc can 4 is caused to bite between a first annular protrusion 3a and a second annular protrusion 3b described later of the sealing body 3. Both are fitted.

  Here, in FIG. 2, the longitudinal cross-sectional view of the sealing body 3 used for the manganese dry battery of FIG. 1 is shown. As shown in FIG. 2, the sealing body 3 has a first annular protrusion 3 a and a second annular protrusion 3 b that are sequentially provided from the outer peripheral portion toward the center portion on the lower surface thereof. That is, the sealing body 3 has a first annular protrusion 3a on the outer edge of the surface on the negative electrode zinc can 4 side, and further has a second annular protrusion 3b on the inner side of the first annular protrusion. Further, a hole 3 d into which the positive carbon rod 2 is inserted is provided at the center of the sealing body 3.

  As shown in FIG. 1, the open end of the negative electrode zinc can 4 has its outer side surface in contact with the inner side surface of the first annular protrusion 3a and presses the first protrusion 3a outward. Are arranged. Thereby, the outer side surface of the open end portion of the negative electrode zinc can 4 is firmly adhered to the inner side surface of the first annular protrusion 3 a of the sealing body 3. Not only the upper and lower ends of the paper tube 5 are bent in the vertical direction but also the outer side surface of the open end of the negative electrode zinc can 4 is formed of the first annular protrusion 3a of the sealing body 3 as described above. It is in close contact with the inner side surface. For this reason, the sealing property of a battery improves and the manganese dry battery which has the outstanding storage characteristic is obtained.

  The contact surface between the outer side surface of the open end of the negative electrode zinc can 4 and the inner side surface of the first annular protrusion 3a of the sealing body 3 is lower than the tightening vertical direction (the axial direction of the positive electrode carbon rod 2). It is preferable to incline inward from the top to the top. The inclination of the outer side surface of the open end portion of the negative electrode zinc can 4 is obtained by inclining the open end portion itself of the negative electrode zinc can 4. In order to make the outer side surface of the opening end portion of the negative electrode zinc can 4 easily adhere to the inner side surface of the first annular protrusion 3 a of the sealing body 3, the outer side surface of the opening end portion of the negative electrode zinc can 4 and the sealing body 3. It is preferable that the inclination angle of the inner side surface of the first annular protrusion 3a is the same. Moreover, since the opening edge part of the negative electrode zinc can 4 presses the 1st cyclic | annular projection part 3a of the sealing body 3 outside, since the clamping force from an up-down direction is added to the said contact surface, the negative electrode zinc can 4 And the sealing portion 3 can be more firmly adhered to each other at the contact portion.

  In order to further improve the hermeticity of the battery, it is preferable to apply a sealant 11 to the portion of the sealing body 3 that holds the positive carbon rod 2 and the portion that contacts the negative electrode zinc can 4 as shown in FIG. . Moreover, as shown in FIG. 3, the opening end of the negative electrode zinc can 4 is applied by applying a sealant 11 to a groove formed between the first annular protrusion 3a and the second annular protrusion 3b. The sealing agent 11 can be reliably applied to the contact portion between the portion and the sealing body 3.

  The thickness of the negative electrode zinc can 4 is, for example, 0.2 to 0.5 mm. Moreover, the groove | channel formed between the 1st annular projection part 3a and the 2nd annular projection part 3b in the sealing body 3 is width 0.2-2.0 mm, for example, and depth 0.3-1 .5 mm.

The manganese dry battery using a paper tube as the exterior member according to the present invention is particularly characterized by the shape of the sealing body 3 and can be manufactured by a conventional method. In particular, examples of the material constituting the sealing body 3 include polyamides such as polyethylene, polypropylene, and nylon, or mixtures thereof. As other battery components, conventional materials may be used.
In the present embodiment, an example of the manganese dry battery using the sealing body 3 having the first annular protrusion 3a and the second annular protrusion 3b has been shown. However, the sealing body 3 is at least the first annular protrusion. If it has the part 3a, the sealing property of a battery will improve as mentioned above, and the battery which has the outstanding storage characteristic will be obtained.

(Embodiment 2)
A manganese dry battery of this embodiment according to the present invention is shown in FIG. FIG. 4 is a front view with a cross section of a part of the manganese dry battery according to the second embodiment of the present invention. The manganese dry battery of the present embodiment has the same configuration as the manganese dry battery of the first embodiment except that the sealing body 13 is used instead of the sealing body 3.
Here, the longitudinal cross-sectional view of the sealing body 13 is shown in FIG. As shown in FIG. 5, the sealing body 13 has a configuration in which a third annular protrusion 3 c is provided in the vicinity of the positive electrode carbon rod 2 further inside the second annular protrusion 3 b of the sealing body 3 of FIG. 2. .

As shown in FIG. 4, the third annular protrusion 3 c is provided in the vicinity of the hole 3 d for inserting the positive electrode carbon rod 2, and a vertical cross-sectional shape is provided between the third annular protrusion 3 c and the positive electrode carbon rod 2. A substantially rectangular groove is formed. And the sealing agent 11 is apply | coated to this groove | channel. Thus, by forming a groove between the positive electrode carbon rod 2 and the third annular protrusion 3c of the sealing body 13, a larger amount of sealing agent can be applied than before, and the sealing performance of the battery is increased. Can be further improved.
Examples of the present invention will be described in detail below, but the present invention is not limited to these examples.

Example 1
An R20 (single 1 type) manganese dry battery according to the present invention having the structure shown in FIG. 1 was produced. First, the sealing body 3 having the structure shown in FIG. 2 was produced by injection molding using polyethylene. The depth of the annular groove formed by the first annular protrusion 3a and the second annular protrusion 3b was 1.0 mm, the width of the bottom was 0.8 mm, and the width of the opening was 1.0 mm.
Next, a bottom paper 9 made of kraft paper is placed on the bottom of the negative electrode zinc can 4 having a thickness of 0.3 mm, and then a paste mainly composed of starch having a good liquid retention property is applied to the inside of the kraft paper. The separator 7 obtained in this way was arranged. Further, the positive electrode mixture 6 was inserted inside the separator 7. In the positive electrode mixture 6, manganese dioxide, conductive carbon black, and an electrolytic solution containing 30 parts by weight of zinc chloride and 70 parts by weight of water are mixed at a weight ratio of 50:10:40, and this mixture is added. What was obtained by pressure molding was used. Then, the upper surface of the positive electrode mixture 6 was covered with a paper 10 made of kraft paper provided with a hole for inserting the positive electrode carbon rod 2 in the center.

  On the other hand, the positive electrode carbon rod 2 was inserted into the sealing body 3. Then, the sealing body 3 with the positive electrode carbon rod 2 inserted in the center is inserted into the negative electrode zinc can 4, and the negative electrode zinc is interposed between the first annular protrusion 3 a and the second annular protrusion 3 b of the sealing body 3. The opening end portion of the can 4 was fitted, and the outer side surface of the opening end portion of the negative electrode zinc can 4 was brought into close contact with the inner side surface of the first annular protrusion 3 a of the sealing body 3. At this time, the portion of the positive electrode carbon rod 2 protruding from the sealing body 3 was connected to the positive terminal plate 1 covering the upper surface of the sealing body 3. On the other hand, a negative electrode terminal plate 8 was connected to the lower part of the negative electrode zinc can 4.

  The outer surface of the negative electrode zinc can 4 was covered with a paper tube 5. The upper end portion of the paper tube 5 was bent inward together with the peripheral edge portion of the positive electrode terminal plate 1 so as to wind the peripheral edge portion of the positive electrode terminal plate 1 disposed on the upper surface of the sealing body 3. In addition, the lower end portion of the paper tube 5 was bent inward together with the peripheral portion of the negative electrode terminal plate 8 so as to wind up the peripheral portion of the negative electrode terminal plate 8 disposed on the bottom surface of the negative electrode zinc can 4. In this way, the opening of the negative electrode zinc can 4 was sealed with the sealing body 3. Thus, an R20 (single 1 type) manganese dry battery according to the present invention was produced.

Example 2
As shown in FIG. 3, the portion of the sealing body 3 that holds the positive carbon rod 2 and the portion that contacts the negative electrode zinc can 4 (formed between the first annular protrusion 3a and the second annular protrusion 3b). The R20 (single 1 type) manganese dry battery was produced in the same manner as in Example 1 except that asphalt was applied as the sealant 11 to the groove).

Example 3
The same sealing body 13 as in FIG. 5 is used instead of the sealing body 3, and as shown in FIG. 4, a groove formed between the first annular protrusion 3a and the second annular protrusion 3b, and a third In the same manner as in Example 1, except that asphalt was applied as a sealant 11 to a groove having a longitudinal cross-sectional shape formed between the annular projection 3c and the positive electrode carbon rod 2 and having a substantially square shape, R20 (single Type 1) Manganese dry batteries were prepared.

<< Comparative Example 1 >>
An R20 (single 1 type) manganese dry battery having the structure shown in FIG. 10 was produced by the following procedure.
Without using the sealing body 3, the lower paper 12 b is arranged on the paper 10, and then asphalt is poured as a sealant 11 on the paper 10, and further the upper paper is placed on the open end of the negative electrode zinc can 4. The negative electrode terminal plate 1 was arranged through the paper 12a. Except for the above, an R20 (single 1 type) manganese dry battery was produced in the same manner as in Example 1.

<< Comparative Example 2 >>
The sealing body 23 shown in FIG. 7 used for the conventional R20 (single 1 type) manganese dry battery was produced by injection molding using polyethylene. Then, as shown in FIG. 9, instead of the sealing body 3, the sealing body 23 is used, and the sealing body 23 holds the positive carbon rod 2 and the sealing body 23 is fitted to the negative electrode zinc can 4. An R20 (single 1 type) manganese dry battery was produced in the same manner as in Example 1 except that asphalt was applied as the sealant 11.

<< Comparative Example 3 >>
The conventional R20 (single 1 type) manganese dry battery shown in FIG. 6 using a metal can as the exterior member was produced by the following procedure.
First, the sealing body 23 shown in FIG. 7 was produced by injection molding using polyethylene.
Next, a bottom paper 9 was disposed on the bottom of the negative electrode zinc can 4 and then a separator 7 was disposed on the inside thereof. Further, the positive electrode mixture 6 was inserted inside the separator 7. And the upper surface of the positive mix 6 was covered with the paper 10 which provided the hole for inserting the positive electrode carbon rod 2 in the center part. The same negative electrode zinc can 4, bottom paper 9, separator 7, positive electrode mixture 5, and reverse paper 10 were used as in Example 1.

  On the other hand, the positive electrode carbon rod 2 is inserted into the sealing body 23, and asphalt is used as the sealing agent 11 in the portion where the sealing body 23 holds the positive carbon rod 2 and the portion where the sealing body 23 fits the negative electrode zinc can 4. Applied. And the sealing body 23 in which the positive electrode carbon rod 2 was inserted in the center part was inserted in the negative electrode zinc can 4, and the opening end part of the negative electrode zinc can 4 was bite and fitted in the lower surface of the sealing body 23. At this time, the portion of the positive electrode carbon rod 2 protruding from the sealing body 23 was connected to the positive terminal plate 21 covering the upper surface of the sealing body 23. On the other hand, a negative electrode terminal plate 18 was connected to the lower part of the negative electrode zinc can 4.

The outer surface of the negative electrode zinc can 4 was covered with an insulating heat-shrinkable tube 15 made of polyvinyl chloride. The heat-shrinkable tube 15 also covers the outer peripheral edge of the sealing body 23 and the seal ring 14, and at the same time plays a role of fixing the sealing body 23, the negative electrode terminal plate 18 and the seal ring 14.
Further, the exposed surface of the heat-shrinkable tube 15 was covered with a metal can 16. The upper end of the metal can 16 is caulked to the peripheral edge of the positive terminal plate 21 via the insulating ring 17, and the lower end of the metal can 16 is connected to the negative end terminal plate via the lower end of the heat-shrinkable tube 15 and the seal ring 14. It caulked to the peripheral part of 18. Thus, the conventional R20 (single 1 type) manganese dry battery which used the metal can for the exterior member was produced.

  40 R20 (single type) manganese dry batteries of Examples 1 to 3 and Comparative Examples 1 to 3 obtained above were prepared. Then, the battery voltage was measured when left at room temperature for 1 day and when left for 1 week. Moreover, the battery voltage after storing for 3 months at 45 ° C. was measured. The evaluation results are shown in Table 1.

  In Comparative Example 1, there was a battery in which the battery voltage was significantly lowered after being left for one week. As shown in FIG. 11, in the battery in which the battery voltage is greatly lowered, the lower cover paper 12b is inclined with respect to the direction perpendicular to the axial direction of the positive electrode carbon rod 2, and the entire upper surface of the lower cover paper 12b is It is considered that the sealing property of the battery was lowered by not being covered with the sealing agent 11. Therefore, even when left at 45 ° C. for 3 months, the battery of Comparative Example 1 showed a large standard deviation with a large decrease in battery voltage when left as compared with other batteries.

  It was found that the battery of Example 1 had a higher battery voltage and a smaller standard deviation than the battery of Comparative Example 2 in which a paper tube was used as a conventional exterior member. That is, the battery of Example 1 had higher reliability than the battery of Comparative Example 2 and exhibited excellent storage characteristics. Further, in the batteries of Examples 2 and 3, the storage characteristics were further improved, and in the battery of Example 3, the storage characteristics equivalent to those of the battery of Comparative Example 3 using a metal can as a conventional exterior member were obtained.

  The manganese dry battery of the present invention is suitably used as a power source for electronic devices such as information devices and portable devices.

It is the front view which made a part of manganese dry battery of Embodiment 1 of the present invention a section. It is a longitudinal cross-sectional view of the sealing body 3 of FIG. It is the front view which made a part of other manganese dry battery of Embodiment 1 of the present invention a section. It is the front view which made a part of manganese dry battery of Embodiment 2 of the present invention a section. It is a longitudinal cross-sectional view of the sealing body 13 of FIG. It is the front view which made a part of manganese dry battery which used the metal can for the conventional exterior member the section. It is a longitudinal cross-sectional view of the sealing body 23 of FIG. It is principal part sectional drawing of the sealing part of FIG. It is the front view which made the cross section the part of the manganese dry battery which used the paper cylinder for the conventional exterior member. It is the front view which made a part of manganese dry battery of comparative example 1 a section. It is the front view which made the cross section the part which shows the state in which the lower cover paper 12b of the manganese dry battery of FIG. 10 inclined.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,21 Positive electrode terminal board 2 Positive electrode carbon rod 3, 13, 23 Resin sealing body 3a 1st cyclic | annular projection part 3b 2nd cyclic | annular projection part 3c 3rd cyclic | annular projection part 3d hole 4 Negative electrode zinc can 5 Paper cylinder 6 Positive electrode mixture 7 Separator 8, 18 Negative terminal board 9 Bottom paper 10 Paper 11 Sealant 12a Upper paper 12b Lower paper 14 Seal ring 15 Heat-shrinkable resin tube 16 Metal can 17 Insulating ring

Claims (3)

A negative electrode zinc can, a separator disposed inside the negative electrode zinc can, a positive electrode mixture disposed inside the separator, a positive electrode carbon rod, a hole for inserting the positive electrode carbon rod in a central portion, and the positive electrode combination A paper covering the upper surface of the agent, a sealing body having a hole for inserting the positive carbon rod at the center and sealing the opening of the negative electrode zinc can, and a paper tube disposed outside the negative zinc can A manganese dry battery having an exterior member comprising:
The sealing body has a first annular protrusion on the outer edge of the surface on the negative electrode zinc can side,
The open end portion of the negative electrode zinc can is arranged such that an outer side surface thereof is in contact with an inner side surface of the first annular projection and the first annular projection is pressed outward. Manganese dry battery. The sealing body further includes a second annular protrusion provided inside the first annular protrusion,
The open end of the negative electrode zinc can fits between the first annular protrusion and the second annular protrusion,
The manganese dry battery according to claim 1, wherein a sealant is applied between the first annular protrusion and the second annular protrusion. The sealing body further includes a third annular protrusion provided in the vicinity of the positive electrode carbon rod inside the second annular protrusion,
The manganese dry battery according to claim 2, wherein a sealing agent is applied between the positive carbon rod and the third annular protrusion.

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