JPH09180692A - Spacer for cylindrical battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make combined use of an AAA size battery so that it can be used as an AAA size itself and also as an AA size, obtain convenience and an economical effect generated therefore, and perform the charging or taking out of a battery storage case and a charger smoothly, easily and efficiently. SOLUTION: In a hollow cylindrical unit 4 constituted by an internal peripheral part 2 having the dimension of external diameter of an AAA size battery and an external peripheral part 3 having the dimension of external diameter of an AA size battery to be formed by receiving an AAA size battery B in this internal peripheral part 2, a conductive spherical unit 7, with which a plus electrode 6a of the AAA size battery comes into contact, is rotatably pivotally supported to one end part of the hollow cylindrical unit 4, a minus electrode of the AAA size battery is disclosed in the other end part, so as to make combined use of the AA size battery, and the AAA size the charging or taking out of a battery storage case and a charging is facilitate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical battery spacer in which the outer diameter of a battery is changed and which can be easily loaded and unloaded in a battery housing case and a charger.

[0002]

2. Description of the Related Art Recently, many cylindrical batteries have been supplied to the market and consumed by using portable electric appliances, games, electric toys and the like. Cylindrical batteries include AA1, AA2, AA3, AA4, AA5, etc., but especially AA type batteries are widely used. In addition, as this type of battery, there is a rechargeable battery that is commercially available in the same manner as a non-rechargeable dry battery, and as the rechargeable battery, a nickel-cadmium battery, a nickel-hydrogen battery, and the like have been commercially available and are often used. In general, among rechargeable batteries, the AA rechargeable batteries are cheaper than those corresponding to the dry batteries AA, AA2, AA. However, as described above, in reality, more electric devices use the AA rechargeable battery than the AA rechargeable battery.

[0003]

By the way, in the battery housing case of this electric device, a concave fitting portion corresponding to the outer diameter of the battery is formed, and at the same time, it corresponds to the positive electrode and the negative electrode of the battery. There is one in which an electrode is attached, and generally, the electrode is formed in a spring shape so that both electrodes of the battery are surely brought into contact with each other with a biasing force to load the battery. In particular, the positive electrode of the battery has a protruding shape, and when the battery is loaded in or taken out of the storage case, the protruding part is caught by the electrode, and the resistance due to the biasing force of the spring-like electrode and sliding contact friction. However, since it is necessary to load or unload the spring-shaped electrode against the biasing force and sliding contact friction of the spring-shaped electrode, the handling thereof is troublesome. Also,
In this way, due to the influence of the biasing force and the sliding friction generated by the positive electrode side projection shape of the battery, the batteries are successively stored in parallel in the charger in parallel and continuously loaded and unloaded. It was inefficient for use in a structured continuous battery charger.

The present invention has been made in view of the problems of the prior art, and its purpose is to allow a AAA battery to be used as a AAA battery itself and also as an AA battery. Type battery for dual use, obtaining convenience and economic effect resulting therefrom, and cylindrical battery spacer capable of smoothly and easily and efficiently loading or unloading in a battery storage case of electric equipment or a continuously chargeable charger Is to provide.

[0005]

In order to achieve the above-mentioned object, in the cylindrical battery spacer according to the present invention,
It is composed of an inner peripheral portion having the outer dimensions of the AAA battery and an outer peripheral portion having the outer dimension of the AA battery, and the AAA is provided in the inner peripheral portion.
In a hollow cylindrical body that is designed to house a battery
An electrically conductive sphere is rotatably pivotally supported at one end thereof so that the positive electrode of the AAA battery projects to the inner circumference and abuts to the outside and contacts the positive electrode. In addition, the negative electrode of the AAA battery contacts the negative electrode. In the invention according to claim 2, at least three guides are formed on the inner peripheral portion of the hollow cylindrical body along the forming direction.

Next, the operation of the present invention will be described. In the present invention, when charging a discharged AAA type rechargeable battery in a charger, first, the inner peripheral portion having the outer diameter dimension of the AAA type rechargeable battery and the external dimensions of the AA type rechargeable battery are set. The AAA rechargeable battery is housed in the inner peripheral part of the cylindrical battery spacer formed of the hollow cylindrical body formed by the outer peripheral part and the outer peripheral part. Next, in order to efficiently load the cylindrical battery spacer accommodating the AAA type rechargeable battery into the charger, the cylindrical battery spacer is pushed vertically downward parallel to both electrodes in the charger. At this time, both electrodes of the AAA rechargeable battery in the cylindrical battery spacer are provided on one end of the hollow cylindrical body with one positive electrode side (having a protrusion) covered with the cylindrical battery spacer. The other negative electrode side is exposed to the other end of the hollow cylindrical body that forms the opening of the cylindrical battery spacer.

When the cylindrical battery spacer containing the AAA type rechargeable battery is loaded on both electrodes of the charger,
The sphere on the positive electrode side of the battery contacts one spring-shaped positive electrode and moves while rotating against the biasing force and friction of that electrode. The sphere that moves against the urging force and sliding contact friction and then conducts to the positive electrode side of the AAA rechargeable battery is urged and supported by the spring-shaped positive electrode, The negative electrode side is supported by the biasing force and friction of the spring-shaped negative electrode, and is loaded in the charger horizontally in parallel with each other.

As described above, the cylindrical battery spacer has the same structure as that of the positive electrode of the AAA rechargeable battery even though the spherical body on the positive electrode side of the battery receives the biasing force and the sliding contact friction by the spring-shaped positive electrode. A slight projection-shaped spherical head that covers the projection and replaces the positive pole avoids the biasing force and sliding friction due to the spring-shaped positive electrode, and also smoothes the contact with the spring-shaped positive electrode by the spherical body. Since the sliding contact friction is reduced by rotational movement, loading and unloading of the charger can be easily and efficiently performed. Further, the cylindrical battery spacer is vertically lowered while maintaining its parallel state by the rotational movement of the sphere of the spring-shaped positive electrode and the movement of the spring-shaped negative electrode accompanied by the urging force and the sliding contact friction, and is uniformly lowered. Since loading is performed, even in a continuous battery charger that continuously charges a plurality of batteries, the batteries can be stored horizontally in the charger in a parallel state and loaded in parallel, and can be sequentially taken out efficiently. You can do it.

According to a second aspect of the present invention, the cylindrical battery spacer accommodating the AAA type rechargeable battery along the guide on the inner peripheral portion is perpendicular to the spring-like electrode in the charging chamber of the charger. It is pushed downward and the cylindrical battery spacers are sandwiched and supported by the biasing force and sliding contact friction by the spring-shaped electrodes on both sides.
Then charge. The AAA rechargeable battery inside the charged cylindrical battery spacer is heat resistant. However, the heat of the battery is radiated from the hollow cylindrical body due to the gap between the battery and the hollow cylindrical body formed by the guide in the inner peripheral portion of the cylindrical battery spacer. Therefore, the rechargeable battery is protected from heat resistance during charging. Moreover, the sphere is rotatably pivotally supported by the spherical receiving portion of the support piece, and the protrusions that are exposed to the outside are few, so that the sphere slides between the positive electrode of the battery storage case or the charger and the positive electrode of the battery. A cylindrical battery spacer is smoothly loaded or unloaded with little influence of resistance or urging force.

Further, according to the present invention, not only is a discharged AAA type rechargeable battery used for charging, but also a AAA type non-rechargeable dry battery is housed in a cylindrical battery spacer, which is used as an electric device such as an electric toy. Can also be used as a power supply for moving an electric toy. Further, according to the present invention, by using the spacer for the cylindrical battery, the AAA battery can also be used as the AA battery, so that the range of use of the battery can be expanded and the economy can be improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in detail with reference to the drawings shown in Examples. 1 to 5
1 shows a preferred embodiment of the cylindrical battery spacer according to the present invention, FIG. 1 is a longitudinal sectional view of a cylindrical battery spacer having a support piece divided into three equal parts, and FIG. FIG. 3 is a right side view of FIG. 3, FIG. 3 is a vertical cross-sectional view of a cylindrical battery spacer having a support piece divided into six equal parts, FIG. 4 is a right side view of FIG. 3, and FIG. FIG. 6 is a front view of a continuous battery charger accommodating a spacer for use, FIG. 6 is a side view of FIG. 5, and FIG. 7 is a plan view of FIG.

The cylindrical battery spacer 1 of the present invention, as shown in FIGS. 1 and 2, has an inner peripheral portion 2 and an AA which are suitable for accommodating a AAA type rechargeable battery B. Molded into a hollow cylindrical body 4 composed of an outer peripheral portion 3 having the outer dimensions of a rechargeable battery (not shown). The hollow cylindrical body 4 is molded from an insulating material, such as ABS resin. The inner peripheral surface 2 has a hollow cylindrical body 4 on the inner peripheral surface thereof.
The three guides 5 are integrally formed in the forming direction, and the inner diameter portion formed by the guides 5 is formed so as to correspond to the outer size of the AAA rechargeable battery B. The three guides 5 are divided into three equal parts on the inner peripheral surface of the circumferential portion 2.

Further, the hollow cylindrical body 4 is open at one end thereof, and when the AAA type rechargeable battery B is stored,
The negative electrode of the AAA rechargeable battery B is formed so as to be exposed to the outside. The end of the guide 5 near the opening side of the hollow cylindrical body 4 is cut out. Further, at the other end of the hollow cylindrical body 4, a spherical body 7 made of a conductive steel ball with which the positive electrode 6 of the AAA rechargeable battery B contacts is located on the central axis O of the hollow cylindrical body 4. It is rotatably and pivotally supported. On the inner peripheral edge 8 at the other end of the hollow cylinder 4, a support piece 9 divided into three equal parts extends toward the center of the circle formed by the hollow cylinder 4, that is, the sphere 7, and at the end of the support piece 9. The spherical surface receiving portion 10 is provided and integrally formed.

That is, the spherical surface receiving portions 10, 10, 10 of the respective support pieces 9, 9, 9 have a bowl shape corresponding to the peripheral side of the spherical surface of the spherical body 7, and are directed in three directions toward the peripheral side surface of the spherical body 7. To abut the peripheral side surface so as to surround the peripheral side surface, and rotatably support the sphere 7 rotatably. The sphere 7 has its top portion 7a projected slightly outward from the spherical surface receiving portions 10, 10, 10 to be exposed to the outside, and the lower bottom portion 7b immediately below the top portion of the sphere is a hollow cylindrical body from its inner peripheral edge 8. 4 is projected inward. In addition,
The support pieces 9, 9, 9 are not limited to dividing the inner peripheral edge 8 into three equal parts.
May be disposed on the inner peripheral edge 8 so as to face each other in the diametrical direction, and therefore the inner peripheral edge 8 may be divided into two equal parts, four equal parts, and six equal parts. Incidentally, the spherical receiving portion 10 'of the support piece 9'divided into six equal parts is half the spherical receiving portion 10 of the support piece 9 divided into three equal parts as shown in FIGS. It can be formed in a bowl shape, and the semi-bowl shaped spherical surface receiving portions 10 ′ can be alternately arranged on the upper and lower sides.

That is, the half bowl-shaped spherical surface receiving portion 10 'is shown in FIG.
As shown in FIG. 4, the upper and lower portions of the peripheral side surface of the spherical body 7 are rotatably and pivotally supported in a staggered manner with the center line o ′ of the spherical body 7 orthogonal to the central axis O of the hollow cylindrical body 4 as a boundary. You can The cylindrical battery spacer 1 of the present invention having such a configuration can be efficiently loaded into the battery charger 20 shown below, and the stored AAA rechargeable battery is charged. In FIG. 5, a front cover 22 of the charger 20 is attached to a front surface of a case body 21 so that the front cover 22 can be pulled up. Also,
A rear cover 23 is fixed to the rear surface of the case body 21. A battery insertion port 24 is provided in the upper portion of the front cover 22, and the battery insertion port 24 is an inlet of a battery insertion chamber 25 (FIG. 6) provided in the upper portion of the case body 21. A lever 26 is attached to the upper part of the case body 21 so as to be pushed down.

Below the battery insertion opening 24 of the front cover 22, a cylindrical battery spacer 1 (hereinafter referred to as a spacer) accommodating an AAA rechargeable battery B (hereinafter referred to as a battery) can be seen. A window 27 is provided to do this. A storage chamber 28 for storing the spacer 1 storing the charged battery B ′ is formed in the lower part of the case body 21, and a swivel drawer 29 is rotatably provided by a shaft 30 in the storage chamber 28. .

5 and 6, the lever 26 is rotatably attached to a shaft 31 fixed to the case body 21, is urged clockwise by a leaf spring 32 in FIG. 6, and is stopped at the position in FIG. doing. At the tip of the lever 26, a push-down portion 33a that comes into contact with the spacer 1 inserted from the outside into the battery insertion chamber 25 is formed. A charging chamber 33 partitioned by a partition wall 34 is formed below the battery insertion chamber 25,
The charging chamber 33 has a space in which the inlet side (upper side) communicates with the battery insertion chamber 25 and extends vertically downward. In the charging room 33,
As shown in FIG. 6, a plurality of pairs of plus electrodes 35 and minus electrodes 36 are vertically aligned in a line at the same intervals as the diameter of the battery B. The plus electrode 35 and the minus electrode 36 are attached to the case body 21 by an electrode attachment member 37.

The positive electrode 35 is made of a conductive leaf spring material and has a vertical recess (not shown). The head of the sphere 7 of the spacer 1 abuts against this recess against the biasing force, and the recess is slidably moved to move the spacer 1
Is guided to move vertically downwards. That is, the positive electrode 3
5. The minus electrode 36 has not only the function of charging the battery B in the spacer 1 but also the function of guiding the spacer 1 movably by the spherical movement of the sphere while resisting the biasing force on the recess. There is.

In order to stabilize the loading position of the spacer 1, two sets of leaf springs 38 are attached to the recessed central portion of the partition wall 34. As shown in FIGS. 5 and 6, the leaf spring 38 pushes the spacer 1 toward the front cover 22 while slightly pushing it up, so that the position of the spacer 1 is stable during charging of the battery B. A charging circuit unit 39 that supplies a charging voltage to the electrodes 35 and 36 is arranged in the space behind the charging chamber 33. The output terminals of the charging circuit section 39 are electrodes 35, 36.
Are provided by the number of pairs and are connected to the electrodes 35 and 36 by lead wires (not shown).

The charged battery accommodating chamber 28 formed below the charging chamber 33 communicates with the outlet side 41 (lower side) of the charging chamber 33. A swivel drawer 29 provided in the charged battery storage chamber 28 is attached to a shaft 30 so as to rotate between a closed position and an open position. In the cylindrical battery spacer 1 of the present invention which is housed and loaded in such a battery charger 20, first, the discharged battery B is housed in the inner peripheral portion 2 along the guide 5. The battery B housed in the inner peripheral portion 2 has a guide 5
The positive electrode 6 supported by the spacer 1 and covered by the spacer 1.
a contacts the sphere 7 inside the inner peripheral portion 2, and the negative electrode 6b is exposed from the hollow cylindrical body 4.

The spacer 1 accommodating the battery B is inserted into the battery insertion chamber 25 through the battery insertion port 24 for loading into the charger 20, and then the lever 26 is pushed down against the leaf spring 32. , The push-down part 26 of the lever 26
a pushes the spacer 1 downward. At this time, the spacer 1
The electrodes 35, 3 in the push-down part 26a and the charging chamber 33
It is moved in a state parallel to 6. The lever 26 strokes until it hits a lever stopper 26b formed integrally with the partition wall 34, and this stroke is equal to one spacer 1 (diameter). As a result, the spacer 1 accommodating the battery B is rotated against the biasing force of the electrode 35 by the stroke of the lever 26 causing the sphere 7 on the one positive electrode 6a side to contact the positive electrode 35 in the charging chamber 33. At the same time, the concave portion of the electrode 35 slides in contact with the negative electrode 6b, and the other negative electrode 6b comes into contact with the negative electrode 36 to move against the biasing force and sliding friction of the electrode 36.

The spacer 1 is supported by the sphere 7 which is electrically connected to the positive electrode 6a side of the battery B and is urged by the positive electrode 35, and the negative electrode 6b side of the battery B is urged by the negative electrode 36. It is supported, locked in an appropriate position, and loaded in the charging chamber 33 in parallel.
The battery B in the spacer 1, which is charged by the electrodes 35 and 36, is gradually heated in the hollow cylindrical body 4. However, the heat of the battery B has a heat radiation effect due to the gap 5a formed by the guide 5 between the outer peripheral surface of the battery B and the hollow cylindrical body 4.

In this way, the spacer 1 is slidably moved between the first electrodes 35 and 36 of the charging chamber 33, and the spacers 1 already present between the electrodes 35 and 36 of the charging chamber 33 are next electrodes 35 'and 36', respectively. The spacer 1 which is slidably moved between them and which is already present between the lowermost electrodes 35 ″ and 36 ″ of the charging chamber 33 passes through the outlet side 41 and drops into the swivel drawer 29. While the spacer 1 sequentially moves the electrodes 35, 36 of the charging chamber 33, the battery B in the inner peripheral portion 2 is charged. Then, it is housed in the housing chamber 28 until it is taken out by the swivel drawer 29.

As described above, in the spacer 1 accommodating the battery B, the sphere 7 on the side of the positive electrode 6a contacts the positive electrode 35 in the charging chamber 33 of the charger 20 and the urging force of the electrode 35 is applied. While moving in opposition to rotation, the negative electrode 6b side also moves in opposition to the biasing force and sliding contact friction of the negative electrode 36. Next, in the spacer 1, the sphere 7 that is electrically connected to the positive electrode 6a side of the battery B is urged and supported by the positive electrode 35, and the negative electrode 6b side of the battery B is urged by the negative electrode 36 and friction is applied to the charger 20. Since the charging chamber 33 is supported and loaded in parallel, the user
The discharged battery B is housed in the spacer 1, and then inserted into the battery insertion chamber 25 of the charger 20 and the lever 26 is pushed. The spacer 1 is pushed vertically downward in parallel between the electrodes 35 and 36. Therefore, the spacer 1 which is sequentially pushed downward by the lever 26 smoothly pushes the lower and lower spacers 1 sequentially.

Further, since the spacer 1 containing the charged battery B'is housed in the swivel drawer 29 in the charged battery housing chamber 28, the spacer 1 housing the charged battery is always used at any time. It can be taken out lightly. The spacer 1 is taken out by rotating the swivel drawer 29 toward you. The charged battery B ′ is taken out from the taken out spacer 1. The cylindrical battery spacer of the present invention is shown in FIGS.
Although the example of using it in the battery charger has been described, it can be applied to a battery storage case such as an ordinary electric device such as an electric toy. That is, a AA non-rechargeable dry battery or a charged AA rechargeable battery is loaded between spring-shaped positive and negative electrodes arranged at both ends in the same rectangular case corresponding to an AA battery. Even when taken out, the spacer of the present invention can be easily formed. In addition, an AA non-rechargeable dry battery or a charged AA rechargeable battery can be used as an AA battery.

[0026]

As described above, the cylindrical battery spacer of the present invention is composed of an inner peripheral portion having the outer dimensions of a AAA battery and an outer peripheral portion having the outer dimensions of an AA battery. A hollow cylindrical body for accommodating a AAA battery inside an inner peripheral portion, wherein one end of the hollow cylindrical body protrudes toward the inner peripheral portion of a positive electrode of the AAA battery and abuts outside of the positive electrode. A conductive sphere is rotatably supported so as to come into contact with the electrode, and the negative electrode of the AAA battery contacts the minus electrode at the other end. In addition to being able to be used as such and also as an AA type, the dual type battery is also used, and the convenience and economic effect resulting from it are obtained, and in the battery storage case of electric equipment and the continuously chargeable charger. Energizing during loading or unloading Be made efficiently and the loading or extraction by reducing the frictional resistance smoothly and easily. Further, since at least three guides are formed in the inner peripheral portion along the forming direction of the hollow cylindrical body, the heat of the rechargeable battery heated by charging in the hollow cylindrical body can be radiated. , Can protect rechargeable batteries.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a spacer for a cylindrical battery of the present invention having a support piece divided into three equal parts.

2 is a right side view of the cylindrical battery spacer shown in FIG. 1. FIG.

FIG. 3 is a vertical cross-sectional view of the spacer for a cylindrical battery of the present invention having a support piece divided into six equal parts.

4 is a right side view of the cylindrical battery spacer shown in FIG. 3. FIG.

FIG. 5 is a front view of a battery charger accommodating a cylindrical battery spacer.

6 is a side view of the cylindrical battery spacer shown in FIG. 5. FIG.

FIG. 7 is a plan view of the cylindrical battery spacer shown in FIG.

[Explanation of symbols]

 1 Cylindrical Battery Spacer 2 Inner Circumference 3 Outer Circumference 4 Hollow Cylindrical Body 5 Guide 5a Gap 6a Positive Electrode 6b Minus Electrode 7 Sphere 8 Inner Edge 9 Supporting Piece 10 Spherical Receiving Section 20 Battery Charger 35 Positive Electrode 36 Negative Electrode B AAA type rechargeable battery B'AAA type battery O Central axis of hollow cylinder o'Center line of sphere

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[Procedure amendment]

[Submission date] January 26, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

According to a second aspect of the present invention, the cylindrical battery spacer accommodating the AAA type rechargeable battery along the guide on the inner peripheral portion is perpendicular to the spring-like electrode in the charging chamber of the charger. It is pushed downward and the cylindrical battery spacers are sandwiched and supported by the biasing force and sliding contact friction by the spring-shaped electrodes on both sides.
Then charge. The AAA rechargeable battery in the charged spacer for a cylindrical battery generates heat . However, the heat of the battery is radiated from the hollow cylindrical body due to the gap between the battery and the hollow cylindrical body formed by the guide in the inner peripheral portion of the cylindrical battery spacer. Therefore, the rechargeable battery is protected from heat generation during charging. Moreover, the sphere is rotatably pivotally supported by the spherical receiving portion of the support piece, and the protrusions that are exposed to the outside are few, so that the sphere slides between the positive electrode of the battery storage case or the charger and the positive electrode of the battery. A cylindrical battery spacer is smoothly loaded or unloaded with little influence of resistance or urging force.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

[0022] Then, the spacer 1 is, together with the spherical body 7 which conducts the positive electrode 6a side of the battery B is supported by being biased by the positive electrode 35, negative pole 6b of the battery B is energized by the negative electrode 36 It is supported, locked in an appropriate position, and loaded in the charging chamber 33 in parallel. The battery B in the spacer 1, which is charged by the electrodes 35 and 36, gradually generates heat in the hollow cylindrical body 4. However, the heat of the battery B has a heat radiation effect due to the gap 5a formed by the guide 5 between the outer peripheral surface of the battery B and the hollow cylindrical body 4.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

[0026]

As described above, the cylindrical battery spacer of the present invention is composed of an inner peripheral portion having the outer dimensions of a AAA battery and an outer peripheral portion having the outer dimensions of an AA battery. A hollow cylindrical body for accommodating a AAA battery inside an inner peripheral portion, wherein one end of the hollow cylindrical body protrudes toward the inner peripheral portion of a positive electrode of the AAA battery and abuts outside of the positive electrode. A conductive sphere is rotatably supported so as to come into contact with the electrode, and the negative electrode of the AAA battery comes into contact with the minus electrode at the other end. In addition to being able to be used as such and also as an AA type, the dual type battery is also used, and the convenience and economic effect resulting from it are obtained, and in the battery storage case of electric equipment and the continuously chargeable charger. Energizing during loading or unloading Be made efficiently and the loading or extraction by reducing the frictional resistance smoothly and easily. Further, since at least three guides are formed in the inner peripheral portion along the forming direction of the hollow cylindrical body, the heat of the rechargeable battery generated by charging in the hollow cylindrical body can be radiated. Can protect rechargeable batteries.

[Procedure 3]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

[Fig. 2]

[Figure 3]

FIG. 4

[Figure 5]

FIG. 6

FIG. 7

Claims (2)

[Claims] 1. An inner peripheral portion having an outer dimension of an AAA battery and an outer peripheral portion having an outer dimension of an AA battery, wherein the AAA battery is housed in the inner peripheral portion. In the hollow cylindrical body, a conductive sphere is rotatably pivoted at one end thereof so that the positive electrode of the AAA battery projects to the inner peripheral portion and abuts to the positive electrode to the outside. A cylindrical battery spacer, wherein the spacer is attached and supported, and the negative electrode of the AAA battery contacts the negative electrode at the other end. 2. The spacer for a cylindrical battery according to claim 1, wherein at least three guides are formed on an inner peripheral portion of the hollow cylindrical body along a forming direction of the hollow cylindrical body.