JP2006261003A - Battery storing chamber and electronic apparatus equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery storing chamber capable of storing plural kinds of batteries while aiming at down-sizing up to minimum necessary size, capable of avoiding abnormal contact raised when the battery is erroneously inserted or unexpected battery is inserted only by a structural consideration, and to provide an electronic apparatus equipped with the same. <P>SOLUTION: A pair of minus contact piece 4a and a plus contact piece 4b of a first battery contact piece 4 are arranged on a back wall face in the battery storing chamber 2, a second battery contact piece 5 is arranged on a back side wall face, and a third battery contact piece is arranged on an inside wall face of a battery lid 3so as to face the first battery contact piece 4. When two pieces of AA size batteries are loaded in upper and lower stage of the battery storing chamber respectively, a negative electrode of the battery at lower stage is connected to the minus contact piece, positive electrode is connected to the plus contact piece of the third battery contact piece, the negative electrode of the battery at upper stage is connected to the minus contact piece of the third battery contact piece, and the positive electrode is connected to the plus contact piece 4b, and current is conducted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a battery storage room, and more particularly to a battery storage room of an electronic device such as a camera, a video camera, a mobile phone, or a portable device.

Conventionally, battery storage chambers that accommodate multiple types of batteries have been proposed that are larger than dedicated battery storage chambers and that allow insertion of batteries of different lengths into one battery storage chamber. Has been.
For example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 09-43672), there is a battery housing part of the main body of the external power supply device and a guide member that enters the battery chamber on the camera side on one side, and a plurality of guide members are provided in the battery housing part. Two types of batteries, or one lithium ion battery, are selectively mounted in the same longitudinal direction, and the contact pieces for the dry battery are attached to the middle and indirect piece units movably provided between the both end faces and the lithium ion battery on the bottom face. The contact piece is provided at a position where the other battery does not come into contact with each other, and the positive electrode connection side of the battery contact piece for the dry battery has a protrusion for preventing reverse polarity mounting, and the indirect piece unit uses a lithium ion battery. In this case, an external power supply device for a camera configured to be moved to a position that does not interfere with the mounting is described.
The external power supply apparatus configured as described above can accommodate two types of batteries without being too large.

Further, Patent Document 2 (Japanese Patent Laid-Open No. 2002-373632) discloses different types of batteries having similar radial dimensions and different height dimensions (in this example, AA type dry batteries and CR-V3). Battery storage so that the contact pressure of the battery contact piece is constant regardless of which battery is loaded, so that the battery contact piece can always contact the battery stably. A room has been proposed.
However, the above-mentioned Patent Document 1 requires a troublesome operation in which a movable middle-indirect piece unit must be moved each time in order to selectively use two different types of power supply batteries. For an unfamiliar person, the handling method is not known, and the situation that it cannot be used is caused.
Patent Document 2 is compatible with two types of power batteries, but is similar in shape and has a problem of erroneous contact when other power batteries having different electrode arrangement positions are loaded. Is not supported.
Further, the above-mentioned Patent Documents 1 and 2 do not cope with contact abnormality when a plurality of (at least three types) power batteries having different shapes, electrode positions, and the like are loaded, and are also miniaturized. Not enough.

JP 09-43672 A JP 2002-373632 A

  The present invention has been made in view of the above-described circumstances, and the object of the present invention is to accommodate a plurality of types of batteries while reducing the size to the minimum necessary size, and only for mechanical considerations. Thus, an object of the present invention is to provide a battery storage room and an electronic device having the battery storage room that can avoid abnormal contact when a battery is erroneously inserted or when a battery that is not scheduled to be used is inserted.

In order to achieve the above-described object, the battery storage chamber according to the invention of claim 1 is a battery storage chamber that can use a plurality of types of batteries having different shapes.
Inside the first battery contact piece consisting of two contact pieces deformed in the longitudinal direction of the battery to be inserted,
Arranging a second battery contact piece that is directly attached to an electrical circuit and is inserted in a direction perpendicular to the longitudinal direction of the battery;
Among the batteries, when a specific first battery is properly inserted, two contact pieces of the first battery contact piece are electrically connected to the first battery, while another specific second battery is connected. When the battery is inserted, one contact piece of the first battery contact piece and the second battery contact piece are electrically connected to each other.
According to a second aspect of the present invention, the battery storage chamber has a battery lid at an inlet portion into which the battery is inserted, and a pair of third chambers on the inner surface side of the battery lid so as to face the first battery. The battery contact piece is provided.
According to a third aspect of the present invention, in the battery storage chamber, the second battery is inserted, and the second battery is inserted into the battery storage chamber by being electrically connected to the second battery contact piece. It is characterized by distinguishing.

According to a fourth aspect of the present invention, in the battery storage chamber, the polarity of the first battery is erroneously inserted into the other contact piece of the two contact pieces of the first battery contact piece. In this case, an insulating member is disposed so as to be non-conductive with the electrode of the polarity.
In the battery storage chamber according to the fifth aspect of the present invention, when the second battery is inserted into the battery storage chamber, one contact piece of the first battery contact piece is a negative electrode of the second battery. The second battery contact piece does not conduct because the surface portion of the second battery is in contact with an insulating member, and the second battery contact piece is not conductive. The second battery is configured to be in contact with the positive electrode of the second battery so as to be conductive.
In the battery storage chamber according to the invention of claim 6, when the battery cover is opened when the second battery is inserted and then removed, the second battery is restored by the restoring force of the first battery contact piece. The second battery is set to be in a state in which the second battery comes out of contact with the second battery when the first battery contacts the outside of the battery storage chamber and returns to the natural length. Yes.
The battery storage chamber according to the invention of claim 7 is characterized in that one contact piece of the first battery contact piece is always conductive even when any battery usable in the battery storage chamber is inserted. It is said.

The battery storage chamber according to the invention of claim 8 is similar in shape to the second battery, and a third battery in which both positive and negative electrodes are provided on one surface is inserted. In addition, the negative electrode of the third battery is in contact with the insulating member so that conduction is blocked and the third battery cannot be used.
According to a ninth aspect of the present invention, in the battery storage chamber, the third battery is a 3V lithium ion battery (CRV-3).
An electronic device according to a tenth aspect of the present invention includes the battery storage chamber according to any one of the first to ninth aspects.

According to the present invention, it is possible to store a plurality of types of batteries while reducing the size to the minimum necessary size, and when a battery is erroneously inserted or a battery that is not scheduled to be used is inserted only by mechanical considerations. It is possible to provide a battery storage chamber capable of avoiding contact abnormality and an electronic device having the battery storage chamber.
In particular, according to the battery storage chamber according to the invention of claim 1, in the battery storage chamber capable of using a plurality of types of batteries having different shapes,
Inside the first battery contact piece consisting of two contact pieces deformed in the longitudinal direction of the battery to be inserted,
Arranging a second battery contact piece which is attached directly to an electrical circuit and which is deformed in a direction perpendicular to the longitudinal direction of the battery;
Among the batteries, when a specific first battery is properly inserted, two contact pieces of the first battery contact piece are electrically connected to the first battery, while another specific second battery is connected. When the battery is inserted, the first battery contact piece and the second battery contact piece are electrically connected to each other, so that the size can be reduced to the minimum necessary size. The battery can be stored and the battery can be reliably contacted with each contact piece.

According to the battery storage chamber of the second aspect of the present invention, the battery housing chamber has a battery lid at an inlet portion into which the battery is inserted, and a pair of first batteries are disposed on the inner surface side of the battery lid so as to face the first battery. Since the battery contact piece 3 is provided, the battery can be easily replaced, and the space can be minimized with a simple configuration.
According to the battery storage chamber of the invention described in claim 3, the second battery is inserted, and the second battery is inserted into the battery storage chamber by being electrically connected to the second battery contact piece. Since it is configured to discriminate that it has been done, automatic adjustment of the supply voltage, change of necessary circuit conditions, etc. can be performed in accordance with the insertion of the second battery.
According to the battery storage chamber of the invention described in claim 4, the polarity of the first battery is erroneously detected in the other contact piece of the two contact pieces of the first battery contact piece. Since the insulating member is disposed so as not to be electrically connected to the electrode of the polarity when inserted, the polarity opposite to that of the normal battery, for example, the positive terminal portion of the battery is connected to the battery. Even if the first battery is inserted in the direction in which the negative terminal portion contacts, although it should be in contact with the piece, it is possible to prevent the contact between the two and prevent reverse voltage from being applied to the electronic device, Moreover, the charge by batteries can be prevented.

According to the battery storage chamber of the fifth aspect of the present invention, when the second battery is inserted into the battery storage chamber, one contact piece of the first battery contact piece is the same as that of the second battery. The second battery contact piece is electrically connected to the negative electrode, and the other contact piece of the first battery contact piece is not electrically connected to the surface portion of the second battery via the insulating member. Since the contact piece is configured to be in contact with the positive electrode of the second battery so as to be conductive, even if a second battery having a different electrode arrangement position from the first battery is inserted, the positive electrode The first battery contact piece and the second battery contact piece on which the electrode and the negative electrode are planned can be accurately and surely brought into contact with each other for normal conduction (energization).
According to the battery storage chamber of the sixth aspect of the present invention, when the battery cover is opened when the second battery is inserted and then removed, the second battery is restored by the restoring force of the first battery contact piece. Since the second battery is set to be in a state of being separated from the second contact piece when the first contact piece jumps out of the battery storage chamber and the first contact piece returns to the natural length. When the battery cover is opened, the second battery immediately jumps out of the battery storage chamber by a predetermined amount, so that the protruding end can be easily picked up by hand and taken out immediately, facilitating battery replacement work.
According to the battery storage chamber of the seventh aspect of the invention, one contact piece of the first battery contact piece is always conductive even when any battery usable in the battery storage chamber is inserted. As a result, even when multiple types of batteries are inserted, it is possible to always make contact with at least one polarity, for example, the negative electrode, and it is possible to select and use a plurality of different types of batteries as appropriate. I have to.

According to the battery storage chamber of the invention described in claim 8, a third battery having a shape similar to that of the second battery and having both positive and negative electrodes provided on one surface is inserted. The negative electrode of the third battery is in contact with the insulating member and is blocked from being used, so that the second and third batteries having similar shapes, Even when a third battery that is not scheduled to be used is loaded, it is possible to realize a system in which non-conduction causes non-conduction when a battery is erroneously loaded (incorrect insertion), and this system is complicated and expensive. This can be realized by adopting a simple mechanical component that can be constructed at low cost instead of an electrical system that leads to the problem.
According to the battery storage chamber of the ninth aspect of the invention, since the third battery is a 3V lithium ion battery (CRV-3), erroneous connection when the battery is inserted is surely prevented. be able to.
According to the electronic device having the battery storage chamber according to the invention described in claim 10, since it has the battery storage chamber according to any one of claims 1 to 9, the electronic device is small in size to the minimum necessary size. A plurality of types of batteries can be stored while reducing the number of batteries, and a contact abnormality at the time of erroneous insertion of a battery or insertion of a battery that is not scheduled to be used can be avoided only by mechanical considerations.

Hereinafter, the battery storage chamber according to the embodiment of the present invention will be described in detail.
1 to 4, 6, and 7 show the configuration of the battery storage chamber according to the first embodiment of the present invention.
FIG. 1 is a perspective view showing an internal structure of a battery storage chamber in an electronic device such as a digital camera, a video camera, a mobile phone, and other portable devices, and FIG. 2 is a diagram of the battery storage chamber of the electronic device in FIG. The perspective view which looked at the internal structure of the part from another angle, FIG. 3 is provided with the insulating member for incorrect contact prevention among the 1st battery contact pieces used for the battery storage chamber of FIG. The perspective view which expands and shows the structure of a part, FIG. 4 is a top view which shows the internal structure of the battery storage chamber in which two AA batteries are loaded, FIG. 5 is an external appearance structure of a dedicated lithium ion rechargeable battery FIG. 6 is a plan view showing the internal configuration of the battery storage chamber in which the dedicated lithium ion rechargeable battery is loaded, and FIG. 7 is a state when the battery lid is opened and the dedicated lithium ion rechargeable battery is taken out. It is a top view which shows the internal structure.

1 to 7, an electronic device 1 is integrally assembled with a battery storage chamber 2 and a printed wiring board (PCB) on which various electronic parts are mounted. The battery storage chamber 2 presents a box (casing) that has a rectangular shape with only one side surface opened, one side surface (left side surface in FIG. 1) is opened, and a battery lid 3 that opens and closes the opening portion. However, one end edge thereof is hinged, and the other end edge is provided with a lock mechanism.
A first battery contact piece 4 composed of a minus contact piece 4a and a plus contact piece 4b is disposed in the battery storage chamber 2, that is, the wall surface (the inner wall surface on the right side) at the back of the battery outlet.
As shown in FIG. 4, the negative contact piece 4a of the first battery contact piece 4 is provided with elasticity by bending the leaf spring into a V-shape, and in the longitudinal direction of the battery (in FIG. It is arranged so that it can be deformed in the left-right direction).
As shown in FIG. 3, the other positive contact piece 4b of the first battery contact piece 4 has a leaf spring 4c bent in a V shape to provide elasticity, and on the leaf spring 4c, the contact is provided. The piece 4d is provided integrally, and the contact piece 4d is sandwiched between the contact pieces 4d so as to be higher than the height (thickness) of the contact piece 4d by a predetermined amount (that is, an amount slightly lower than the height of the positive electrode portion of the battery) ( Thick) contact prevention spacers 4e are stacked.

A second battery contact piece 5 is arranged on the inner wall on one side in the longitudinal direction of the battery storage chamber 2 so as to be along the longitudinal direction of the battery.
The second battery contact piece 5 is directly attached to an electric circuit of the printed wiring board 6 on which various electronic components are mounted, and is perpendicular to the longitudinal direction of the battery to be inserted, that is, in FIG. It is formed so as to be deformed in a direction perpendicular to the paper surface.
That is, the second contact piece 5 is fixed at the base end side to the printed wiring board 6, and the other end side extends from a through hole formed in the battery storage chamber 2. The tip is directed to the side 4, and the tip side protrudes obliquely into the battery storage chamber 2.
Further, as shown in FIG. 2, a third battery contact piece 7 comprising a pair of contact pieces, that is, a positive contact piece 7a and a negative contact piece 7b, is disposed on the inner wall surface of the battery lid 3. Yes. The pair of plus contact piece 7a and minus contact piece 7b are arranged to face the corresponding positions at the same height as the minus contact piece 4a and plus contact piece 4b constituting the second battery contact piece 4 described above. ing. Reference numerals 8 a and 8 b are lead wires for taking out power from the ends of the battery contact pieces 4 and 7, and are connected to the printed wiring board 6.
First, the case where the AA battery 9 as a specific first battery is stored (sometimes referred to as loading or insertion) in the battery storage chamber 2 having such a configuration will be described.

The battery lid 3 is unlocked, the battery lid 3 is opened around the hinge provided at one end edge, the first AA battery 9 is inserted from the negative electrode side, and then the second AA battery 9 is inserted. Is inserted from the positive electrode side, and then the battery lid 3 is closed and locked. At this time, the negative electrode of the first AA battery 9 (the battery located in the lower side in FIG. 2) is in contact with the negative contact piece 4a of the first battery contact piece 4, and the positive electrode is the third electrode. The positive electrode of the second AA battery 9 (battery located on the upper side in FIG. 2) is in contact with the positive contact piece 7a of the battery contact piece 7 and the positive contact of the first battery contact piece 4. Power is supplied to a predetermined circuit of the printed wiring board 6 in contact with the piece 4b (state shown in FIG. 4).
In this way, when the AA battery 9 is properly inserted, the first battery contact piece 4 and the third battery contact piece 7 come into contact with each other, and when the battery is conductive, one output voltage is 1 If it is .5V, two power supply voltages in total are supplied to a predetermined circuit because they are connected in series.
In contrast, the operation when the two AA batteries 9 are not correctly loaded will be described.
For example, assuming that the first AA battery 9 is properly inserted as described above, the second AA battery 9 is inserted in the opposite direction unlike normal loading, that is, the It is assumed that the battery lid 3 is inserted from the negative electrode side of the three-shaped battery 9 and locked.

Then, the negative electrode of the upper AA battery 9 tries to come into contact with the contact piece 4d of the positive contact piece 4b which is the other terminal of the first battery contact piece 4, but the contact piece 4d has the spacer 4e. Thus, the negative electrode of the battery 9 only contacts the spacer 4e, does not contact the contact piece 4d, and does not conduct.
Therefore, even if the electrode of the battery 9 is mistakenly inserted, the wrong connection is prevented.
That is, the battery storage chamber 2 can be prevented from being erroneously connected when the battery is erroneously inserted without requiring a special switching operation or the like.
Note that the second battery contact piece 5 when the AA battery 9 is inserted into the battery storage chamber 2 is located in a concave portion in the middle of the two AA batteries 9 in a parallel state. As shown, even if it does not contact the outer peripheral surface of the AA battery 9 or comes into contact with the AA battery 9, it is hardly displaced in the direction perpendicular to the longitudinal direction of the battery 9 and remains in a non-conductive state. Therefore, it is clearly distinguished from when a dedicated lithium ion rechargeable battery described later is inserted (loaded).
FIG. 5 shows an external configuration of a dedicated lithium ion rechargeable battery 10 as a second battery that can be loaded and used in the battery storage chamber 2 according to the present invention. The dedicated lithium ion battery 10 has a substantially oval column shape, and the width, thickness, and length dimensions when two AA batteries 9 are arranged in parallel are approximated. Two minus electrodes 10a formed in a circular groove shape are provided, and a plus electrode 10b is disposed at the approximate center in the width direction of the minus electrode 10a.

In order to insert the dedicated lithium ion rechargeable battery 10 having such a configuration into the battery storage chamber 2, the battery lid 3 is unlocked and opened in the same manner as in the case of inserting the AA battery 9 described above, When the battery is inserted from the negative electrode 10a side and the state shown in FIG. 6 is reached, the battery cover 3 is locked. In this insertion process, the second battery contact piece 5 attached to the printed wiring board 6 and projecting into the battery storage chamber 2 from the opening is pressed against the side peripheral surface of the dedicated lithium ion battery 10 and is shown in FIG. As shown in FIG. 3, the battery 10 is deformed in a direction perpendicular to the longitudinal direction of the battery 10 and is brought into contact with the plus electrode of the dedicated lithium ion rechargeable battery 10 to conduct.
On the other hand, the minus electrode 10 a of the dedicated lithium ion rechargeable battery 10 inserted to a predetermined depth position is in contact with the minus contact piece 4 a of the first battery contact piece 4 to be conductive.
In this way, the negative electrode 10a of the dedicated lithium ion rechargeable battery 10 inserted into a predetermined position in the battery storage chamber 2, the negative electrode 4a of the first battery contact piece 4 from the positive electrode 10b, and the second battery. A power source is led out through the contact piece 5 and supplied to a predetermined circuit mounted on the printed wiring board 6. At this time, an input voltage is detected in a predetermined circuit, and it is determined that the dedicated lithium ion battery 10 is inserted into the battery storage chamber.

The dedicated lithium ion battery 10 used by being inserted into the battery storage chamber 2 according to the present invention has substantially the same cross-sectional shape when two AA batteries 9 are arranged in parallel, and the length dimension is also AA. Since the size of the battery 9 is almost the same as that of the battery 9, the battery storage chamber 2 can be reduced to the capacity of about two AA batteries 9 by using the dedicated lithium ion rechargeable battery 10.
Further, regarding the relationship with the plus contact piece 4b which is the other contact piece of the first battery contact piece 4 when the dedicated lithium ion rechargeable battery 10 is inserted into the battery storage chamber 2, the dedicated lithium ion rechargeable battery is shown. Since the negative electrode 10a of No. 10 is in a recessed groove recessed from the bottom surface (the right end surface in FIG. 6), only the spacer 4e made of an insulating material abuts the bottom surface, and the negative electrode 10a and the positive contact piece 4b are It becomes a non-conductive state and does not cause any trouble.
On the other hand, a lithium ion rechargeable battery (CR-V3 rechargeable battery) as a third battery having a shape similar to that of the dedicated lithium ion battery 10 as the second battery and having a positive electrode and a negative electrode provided on the bottom surface thereof. This third battery can also be inserted into the battery storage chamber 2 according to the present invention, but the negative electrode provided on the bottom surface thereof contacts the spacer 4e of the first battery contact piece 4 It is a structure that can not be contacted.

That is, it is considered that erroneous contact does not occur even when a third battery that cannot be used originally is inserted.
According to the present embodiment, even when different types of batteries are inserted into the battery storage chamber 2, a complicated circuit such as an electrical misconnection prevention circuit can be obtained only by providing a simple mechanical component such as the spacer 4e. Since it can implement | achieve without providing a system, the non-conduction system at the time of incorrect insertion can be constructed | assembled at low cost.
FIG. 7 shows a state when the dedicated lithium battery 10 is taken out in the above embodiment. In the figure, when the battery cover 3 is opened, the dedicated lithium ion rechargeable battery 10 does not appear in the negative contact piece 4a of the first battery contact piece 4 disposed on the back side of the battery storage chamber 2 and in the drawing. Is pushed out by the restoring force of the leaf spring 4 c of the first battery contact piece 4, and the tip end portion of the second battery contact piece 5 is located on the back side of the battery storage chamber 2 from the bottom surface of the dedicated lithium ion rechargeable battery 10. Therefore, the pressing force applied to the wall surface of the battery storage chamber 2 by the second battery contact piece 5 is reduced or eliminated, and can be easily taken out.
That is, the dedicated lithium ion rechargeable battery 10 can be taken out very easily.

Next, a second embodiment of the present invention will be described with reference to FIG.
In this embodiment, an example in which the minus contact piece 4a ′ and the plus contact piece 4b ′ of the first battery contact piece 4 ′ are directly attached to the printed wiring board (PCB) 6 is shown.
Similarly to the second battery contact piece 5, the minus contact piece 4a 'and the plus contact piece 4b' can be directly attached to the printed wiring board 6, thereby eliminating the need for lead wires and reducing the number of assembly steps. It becomes.
Next, a third embodiment of the present invention will be described with reference to FIG.
FIG. 9 shows an embodiment in which the second battery contact piece 11 is disposed so as to extend from the surface of the first battery contact piece 4 ′ to which the minus contact piece 4a ′ and the plus contact piece 4b ′ are attached. The form is shown.
In the case of this embodiment, the second battery contact piece 11 extends in a direction opposite to the battery insertion direction, so that an appropriate guide curved surface is provided so that the bottom surface of the battery and the tip thereof do not contact when the battery is inserted. However, the structure is further simplified and contributes to miniaturization.
The present invention is not limited to that described above and shown in the drawings, and various modifications can be made without departing from the scope of the present invention.

  The battery storage room of the present invention has been described with the intention of being used for digital cameras. It is suitable as a battery storage chamber.

It is a perspective view which shows the internal structure of the part of the battery storage chamber which concerns on the 1st Embodiment of this invention. It is the perspective view which looked at the internal structure of the part of the battery storage chamber of the electronic device of FIG. 1 from another angle. It is a perspective view which expands and shows the structure of the part in which the insulating member for incorrect contact prevention is provided among the 1st battery contact pieces used for the battery storage chamber of FIG. It is a top view which shows the internal structure of the battery storage chamber with which two AA batteries are filled. It is a perspective view which shows the external appearance structure of an exclusive lithium ion rechargeable battery. It is a top view which shows the internal structure of the battery storage chamber in which the exclusive lithium ion rechargeable battery is loaded. It is a top view which shows the internal structure of the battery storage chamber of the state when taking out a dedicated lithium ion rechargeable battery. It is a top view which shows the internal structure of the battery storage chamber which concerns on the 2nd Embodiment of this invention. It is a top view which shows the internal structure of the battery storage chamber which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic device 2 Battery storage chamber 3 Battery cover 4,4 '1st battery contact piece 4a, 4a' Negative contact piece 4b, 4b 'Positive contact piece 4c Leaf spring 4d Contact piece 4e Spacer 5 2nd battery contact piece 6 Printed wiring board (PCB)
7 Third battery contact piece 7a Plus contact piece 7b Negative contact piece 8a, 8b Lead wire 9 AA battery 10 Dedicated lithium ion rechargeable battery 10a Negative electrode 10b Plus electrode 11 Second battery contact piece

Claims (10)

In the battery storage room where multiple types of batteries having different shapes can be used,
Inside the first battery contact piece consisting of two contact pieces deformed in the longitudinal direction of the battery to be inserted,
Arranging a second battery contact piece which is attached directly to an electrical circuit and which is deformed in a direction perpendicular to the longitudinal direction of the battery;
Among the batteries, when a specific first battery is properly inserted, two contact pieces of the first battery contact piece are electrically connected to the first battery, while another specific second battery is connected. A battery storage chamber configured so that one contact piece of the first battery contact piece and the second battery contact piece are electrically connected when a battery is inserted.   The battery storage chamber has a battery lid at an inlet portion into which the battery is inserted, and a pair of third battery contact pieces are provided on the inner surface side of the battery lid so as to face the first battery. The battery storage chamber according to claim 1.   The battery storage chamber is configured to determine that the second battery is inserted into the battery storage chamber by inserting the second battery and conducting with the second battery contact piece. The battery storage chamber according to claim 1 or 2.   Of the two contact pieces of the first battery contact piece, when the polarity of the first battery is mistakenly inserted into the other contact piece, it becomes non-conductive with the electrode of the polarity. The battery housing chamber according to claim 1, wherein an insulating member is disposed on the battery housing chamber.   When the second battery is inserted into the battery storage chamber, one contact piece of the first battery contact piece is brought into contact with the negative electrode of the second battery to conduct therethrough, and the first battery contact piece The other contact piece of the second battery is in contact with the surface portion of the second battery through the insulating member and does not conduct, and the second battery contact piece is in contact with the positive electrode of the second battery. The battery storage chamber according to claim 1, wherein the battery storage chamber is configured to be conductive.   When the battery cover opens the battery cover when the second battery is inserted and then removed, the second battery pops out of the battery storage chamber by the restoring force of the first battery contact piece. 3. The device according to claim 1, wherein when the first contact piece returns to a natural length, the second battery is set in a state in which contact with the second contact piece is separated. Battery compartment.   The one contact piece of the first battery contact piece is always conductive even when any battery usable in the battery storage chamber is inserted. Battery compartment.   The battery storage chamber is similar in shape to the second battery, and when a third battery having both positive and negative electrodes provided on one surface is inserted, The battery storage chamber according to any one of claims 1 to 7, wherein a negative electrode is in contact with the insulating member to prevent conduction and cannot be used.   The battery storage chamber according to claim 8, wherein the third battery is a 3V lithium battery (CRV-3).   An electronic apparatus comprising the battery storage chamber according to claim 1.

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