BATTERY STORAGE CASE AND ELECTRONIC DEVICE

1 . A battery storage case comprising:

a case body having a storage section capable of having a battery accommodated therein; and

a contact terminal attached to the storage section to be in contact with a positive or negative electrode of the battery to be stored in the storage section,

the contact terminal including:

a spiral spring portion including a plurality of turns from a first turn which is located on the side of the inner surface of the case body to a final turn which is located on the side of the electrode of the battery; and

an extension extending from the end of the final turn, wherein, in a first plane seen toward the first turn side from the final turn side, the extension extends through a center portion of a circular coil shape formed by the plurality of turns such that the tip of the extension is located outside the final turn.

2 . The battery storage case according to claim 1 , wherein

the tip of the extension is located at a position shifted from the final turn toward the first turn side, as seen in a second plane orthogonal to the first plane.

3 . The battery storage case according to claim 1 , wherein

the extension curves convexly toward the electrode of the battery.

4 . The battery storage case according to claim 1 , wherein

the tip of the extension inclines toward the first turn side.

5 . The battery storage case according to claim 1 , wherein

the case body includes a bottom side and an opening side opposed to the bottom, and

the extension extends toward the bottom side of the case body from the opening side of the case body.

6 . An electronic device, comprising:

a housing;

a storage recess formed in the housing to accommodate therein a battery; and

a contact terminal attached to the storage recess to be in contact with a positive or negative electrode of the battery to be stored in the storage recess,

the contact terminal including:

a spiral spring portion including a plurality of turns from a first turn which is located on the side of an inner surface of the storage recess to a final turn which is located on the side of the electrode of the battery; and

an extension extending from the end of the final turn, wherein, in a first plane seen from the final turn side toward the first turn side, the extension extends through a center portion of a circular coil shape formed by the plurality of turns such that the tip of the extension is located outside the final turn.

7 . The electronic device according to claim 6 , wherein

the tip of the extension is located at a position shifted from the final turn toward the first turn side, in a second plane which is orthogonal to the first plane.

8 . The electronic device according to claim 6 , wherein

the extension curves convexly toward the electrode of the battery.

9 . The electronic device according to claim 6 , wherein

the tip of the extension inclines toward the first turn side.

10 . The electronic device according to claim 6 , wherein

the storage recess is formed with a bottom side and an opening side opposed to the bottom, and

the extension extends toward the bottom side of the storage recess from the opening side of the storage recess.

11 . A battery storage case comprising:

a case body having a storage section capable of having a battery accommodated therein; and

a contact terminal attached to the storage section to be in contact with a positive or negative electrode of the battery to be stored in the storage section,

the contact terminal including:

a spiral spring portion including a plurality of turns from a first turn which is located on the side of an inner surface of the case body to a final turn which is located on the side of the electrode of the battery; and

an extension extending from the end of the final turn, wherein, as seen in a first plane orthogonal to the axis of the spiral spring portion, the extension extends through about the axis of the spiral spring portion such that the tip of the extension is located outside the final turn.