JP6562620B2 - Battery unit and electronic equipment - Google Patents

Description

  The present invention relates to a battery unit and an electronic device.

  A battery unit using a secondary battery is widely used as a power source for electronic devices such as cameras. In the electronic device of Patent Document 1, the leaf spring-like contact piece provided in the electronic device main body is pushed by a certain stroke by the battery unit, and the reaction force contacts the terminal group of the battery unit. The device body is electrically connected.

JP 2009-21118A

  However, in the electronic device of Patent Document 1, when the battery unit instantaneously moves in a direction away from the leaf spring-like contact piece due to an impact such as when the electronic device is dropped, the stroke of the leaf spring-like contact piece is momentarily exceeded. As a result, electrical disconnection (instantaneous interruption) may be caused.

  In order to prevent electrical disconnection (instantaneous disconnection) and increase the reliability of electrical connection, it is effective to lengthen the stroke of the leaf spring-like contact piece. However, when the leaf spring-like contact piece is pushed by the battery unit, the contact point slides in the longitudinal direction of the terminal group of the battery unit, so the terminal group of the battery unit also corresponds to the leaf spring-like contact piece having a long stroke. It needs to be long. In that case, since the terminal group of the battery unit is provided on the internal substrate of the battery unit, it is necessary to enlarge the battery unit itself in order to secure the mounting area of the electronic components and the wiring area of the electronic circuit on the internal substrate. .

  In view of such a problem, the present invention provides a battery unit and an electronic device system capable of suppressing the enlargement of the battery unit and ensuring the reliability of electrical connection between the battery unit and the electronic device. Objective.

A battery unit according to one aspect of the present invention is a battery unit that is detachably housed in a battery chamber formed in an electronic device, generates an electromotive force, can be charged, and information on the battery unit. A communication terminal for communicating with the electronic device, and a substrate on which a positive electrode terminal and a negative electrode terminal connected to the battery cell are formed, and facing the contact piece of the electronic device in a state of being housed in the battery chamber the opposing surface, said communication terminal, said positive terminal, and the negative terminal are arranged side by side, prior Symbol communications terminal in said facing surface, said positive electrode terminal, and in the direction perpendicular to the negative terminal are arranged direction, The positive electrode terminal and the negative electrode terminal are longer than the communication terminal, and the positive electrode terminal, the negative electrode terminal, and the communication terminal extend from the respective first ends to the outer shape of the substrate. Away, characterized in that is arranged to be substantially equal to each other.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing the enlargement of a battery unit, the battery unit and electronic device system which can ensure the reliability of the electrical connection of a battery unit and an electronic device can be provided.

It is a block diagram of the battery unit which concerns on embodiment of this invention. It is a top view of a circuit board. It is a perspective view of a camera body. It is a development perspective view of a camera body. It is a block diagram of the main-body part which comprises the main body unit of a camera main body. It is a disassembled perspective view of a main-body part. It is the sectional view on the AA line of Fig.5 (a). It is a block diagram of the connector of a camera. It is a figure which shows the insertion state to the camera of a battery unit.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same members are denoted by the same reference numerals, and redundant description is omitted.
(About battery unit)
FIG. 1 is a configuration diagram of a battery unit 100 according to an embodiment of the present invention. (A) is a front perspective view, (b) is a rear perspective view, (c) is a top view, and (d) is an exploded perspective view. The battery unit 100 is a dedicated battery unit corresponding to a digital single-lens reflex camera main body (hereinafter referred to as a camera main body) 200 which is an example of the electronic apparatus shown in FIG. The battery unit 100 is inserted into the camera body 200 in the + Y direction (upward) shown in FIG. 1A, and is detached from the camera body 200 in the −Y direction (downward) shown in FIG. That is, the Y direction is a direction in which the battery unit 100 is attached to and detached from the camera body 200.

  The battery case 101 includes a lower case 101a that is a first case and an upper case 101b that is a second case. The boundary portion 101c is a boundary between the lower case 101a and the upper case 101b, and is parallel to the X direction when viewed from the Y direction upward. The battery case 101 has an upper surface 101d and a lower surface 101e that are planes perpendicular to the attaching / detaching direction, and side surfaces 101f, 101g, 101h, and 101i that are planes perpendicular to the upper surface 101d and the lower surface 101e, and has an approximately rectangular parallelepiped shape. The upper surface 101d, the lower surface 101e, and the side surfaces 101f and 101g of the battery case 101 straddle the lower case 101a and the upper case 101b. The lower case 101a of the battery case 101 is configured such that the length in the short side direction (Z direction) of the upper surface is longer than that of the upper case 101b.

  In the lower case 101a of the upper surface 101d of the battery case 101, terminal openings 102a, 102b, 102c, and 102d are formed at positions facing a plurality of terminals formed on the circuit board 106 that is the battery internal substrate. When there is no need to distinguish individual terminal openings, they are collectively referred to as a terminal opening group 102.

  Since the battery unit 100 is a battery unit dedicated to the camera body 200 and is not compatible with other battery units, it is necessary to prevent erroneous insertion of other battery units into the camera body 200. In this embodiment, a substantially rectangular parallelepiped concave shape (concave portion) 103 for preventing erroneous insertion is formed across the upper surface 101d and the two side surfaces 101g and 101h of the battery unit 100. The concave shape 103 is formed in the lower case 101a having a length in the short side direction (Z direction) on the upper surface that is longer than that in the upper case 101b. Therefore, the length of the upper case 101b in the short side direction (Z direction) is restricted. It can be formed without receiving. In the present embodiment, the length L3 of the concave shape 103 in the short side direction (Z direction) of the upper surface is approximately the same as the length of the upper case 101b in the short side direction (Z direction) of the upper case 101b. You may exceed the length of a transversal direction (Z direction). In addition, since the concave shape 103 is formed at the corner of the lower case 101a opposite to the terminal opening group 102 with respect to the central axis in the upper surface longitudinal direction (X direction) of the battery unit 100, the terminal opening group 102 It can be formed without being restricted by the position of.

  Although details will be described later, a convex shape 602 a corresponding to the concave shape 103 is formed in the battery chamber 602 of the camera body 200. This prevents the insertion of another battery unit in which the concave shape 103 is not formed. In addition, it is possible to prevent the battery unit 100 from being inserted with the front and back and the vertical direction wrong. In order to function more as prevention of erroneous insertion of other battery units into the camera body 200, the length L3 of the concave shape 103 in the upper surface short direction (Z direction) and the length L4 in the upper surface longitudinal direction (X direction) are set. It is desirable to make it as long as possible. As the length L3 and the length L4 are increased, the convex shape 602a of the camera body 200 can be increased, and it is possible to prevent erroneous insertion of a battery unit having a smaller outer shape than the battery unit 100. is there. Specifically, it is possible to prevent erroneous insertion of a battery unit having a length from L1 to L5 in the upper surface short side direction (Z direction) of the battery unit 100 and a length from L2 to L6 in the upper surface longitudinal direction (X direction). Is possible.

  When the battery unit 100 is charged, the locking groove 104 is held by a locking claw protruding from the charger so that the battery unit 100 does not fall out of the charger.

  In the battery case 101, two battery cells 105, a circuit board 106, and a spacer 107 are accommodated in an integrated form. The two battery cells 105 have a substantially rectangular parallelepiped shape, and as shown in FIG. 1D, the longitudinal direction is arranged in parallel to the Y direction and in parallel to the Z direction. The battery cell 105 generates an electromotive force and can be charged. A lead 105 a extending from the battery cell 105 is connected to a predetermined portion of the circuit board 106. The spacer 107 is formed of a resin material and holds the two battery cells 105 and the circuit board 106. Note that the connection configuration of the battery cell 105 and the circuit board 106 and the holding configuration by the spacer 107 are not particularly defined in the configuration of this embodiment.

  The circuit board 106 will be described with reference to FIG. FIG. 2 is a top view of the circuit board 106. A terminal group 108 formed of a plurality of terminals is formed on the circuit board 106. As will be described later, the terminal group 108 contacts and is electrically connected to the terminal contact piece group 607 of the camera body connector 606 when the battery unit 100 is attached to the camera body 200. The positive terminal 108 a is connected to the positive lead of the battery cell 105 through the circuit board 106. The negative electrode terminal 108 b is connected to the negative electrode lead of the battery cell 105 via the circuit board 106. The authentication terminal 108c communicates with the camera body 200 and the individual identification information set in the battery unit 100. The temperature detection terminal 108d communicates the internal temperature information of the battery unit 100 with the camera body 200 and the charger. The temperature detection terminal 108d transmits the internal temperature information of the battery unit 100 to the charger when the battery unit 100 is charged by the charger. By performing charging control using the transmitted information, problems due to abnormal charging are prevented. The temperature detection terminal 108d determines whether the battery unit 100 is attached to the camera body 200 or an external power supply device (for example, an AC power supply device) corresponding to the camera body 200 is attached. It can also be used.

  The plurality of terminals formed on the circuit board 106 are arranged in the longitudinal direction (X direction) from the central axis in the longitudinal direction (X direction) of the upper surface 101d of the battery unit 100, the positive terminal 108a, the temperature detection terminal 108d, the authentication terminal 108c, The negative terminals 108b are arranged at equal intervals in the order. By disposing the positive electrode terminal 108a and the negative electrode terminal 108b apart from each other, the possibility that the positive electrode terminal 108a and the negative electrode terminal 108b are short-circuited to cause a malfunction is reduced. Further, the temperature detection terminal 108d is disposed between the positive terminal 108a and the authentication terminal 108c, and the positive terminal 108a and the authentication terminal 108c are disposed apart from each other. By doing so, the possibility that the positive terminal 108a and the authentication terminal 108c are short-circuited to cause a malfunction (for example, a failure of the authentication IC) is reduced.

  In the present embodiment, in the short direction (Z direction) of the upper surface 101d of the battery unit 100, the terminal lengths of the positive terminal 108a and the negative terminal 108b are longer than the terminal lengths of the authentication terminal 108c and the temperature detection terminal 108d. Furthermore, the lengths of the positive terminal 108a and the negative terminal 108b, the authentication terminal 108c, and the temperature detection terminal 108d are substantially equal. The terminal group 108 is formed such that the distance from the outer shape of the circuit board 106 to one end of each terminal close to the outer shape of the circuit board 106 is substantially equal.

  Elements such as an IC, a resistor, and a capacitor are mounted on the area A and the back surface (battery cell side) of the front surface (battery case side) of the circuit board 106, thereby forming a battery circuit. As described above, one end of the terminal group 108 close to the outer shape of the circuit board 106 is aligned, only the positive terminal 108a and the negative terminal 108b are lengthened, and the authentication terminal 108c and the temperature detection terminal 108d are shortened. . By doing so, the area of the area A of the circuit board 106 can be ensured (particularly the hatched portion of the area A), and the increase in size of the battery unit 100 accompanying the increase in size of the circuit board 106 is suppressed. The notch shape 106 a is formed on the circuit board 106 so as not to interfere with the concave shape 103 formed on the lower case 101 a of the battery case 101.

The terminal group 108 of the circuit board 106 is exposed to the outside through the terminal opening group 102 of the lower case 101 a of the battery case 101. The positive terminal 108a faces the terminal opening (positive terminal opening) 102a, the negative terminal 108b faces the terminal opening (negative terminal opening), the authentication terminal 108c faces the terminal opening (communication terminal opening) 102c, and the temperature detection terminal 108d faces the terminal opening (communication terminal opening) 102d. In the short side direction (Z direction) of the upper surface 101d, the opening lengths of the terminal openings 102a and 102b are longer than the opening lengths of the terminal openings 102c and 102d. Furthermore, the opening lengths of the terminal opening 102a and the terminal opening 102b and the terminal opening 102c and the terminal opening 102d are substantially equal. Each terminal opening is formed such that the distance from the outer shape of the battery unit 100 to one end of each terminal opening that is close to the outer shape of the battery unit 100 is substantially equal. By making the shape of the terminal opening group 102 corresponding to the shape of the terminal group 108 of the circuit board 106, the area of the area A of the circuit board 106 can be secured (particularly the hatched portion of the area A). The increase in size of the battery unit 100 associated with the increase is suppressed. On the side surface 101h of the battery case 101, a plus mark and a minus mark are displayed at positions corresponding to the terminal openings 102a and 102b, respectively.
(About the camera body)
3A and 3B are front and rear perspective views of the camera body 200, respectively. The camera body 200 generates image information by subjecting a subject image to photoelectric conversion by an image sensor such as a charge-coupled devices (CCD) or a complementary metal-oxide semiconductor (CMOS). Then, image information is recorded on an electronic recording medium such as an arbitrary memory.

  The camera body 200 is formed with a grip portion 200a for the photographer to stably hold the camera during shooting. The mount unit 201 fixes a detachable photographic lens (not shown) to the camera body 200. The mount contact 202 transmits a control signal, a status signal, a data signal, and the like between the camera body 200 and the photographing lens and has a function of supplying power to the photographing lens. The lens unlock button 203 can be pushed to remove the photographing lens. The mirror box 204 is disposed in the camera casing, and guides the imaging light flux that has passed through the imaging lens. A quick return mirror 206 is provided inside the mirror box 204. The quick return mirror 206 is held at an angle of about 45 ° with respect to the photographic optical axis in order to guide the photographic light beam to the finder, and is held in a position retracted from the photographic light beam to guide it to the image sensor. Move between.

  A release button 207 for instructing shooting, a main dial 208 for setting a shutter speed, a lens aperture value, and the like according to an operation mode at the time of shooting, and a plurality of settings for shooting are set on the grip unit 200a side of the camera body 200. A setting button 209 is arranged. A part of the operation result by these members is displayed on the display panel 210. The release button 207 is lightly pressed down to the first step, and the state where the first switch is on is referred to as “half-press” (SW1). In this state, photometry and AF (automatic focus adjustment) are performed. When the second switch is pressed from the halfway down to the second stage, the state where the second switch is on is referred to as “full press” (SW2). In the upper center of the camera body 200, a strobe unit 211 that pops up with respect to the camera body 200 and a mounting portion 212 for attaching an external strobe are arranged. A shooting mode setting dial 213 is arranged on the opposite side of the camera body 200 from the grip portion 200a.

  A finder eyepiece window 214 is provided above the rear side of the camera body 200, and a liquid crystal monitor 215 capable of displaying a photographed image is provided near the center. A sub dial 216 arranged on the side of the liquid crystal monitor 215 plays a role of assisting setting by the main dial 208. The sub dial 216 is also used to select a captured image displayed on the liquid crystal monitor 215. The main switch 217 starts or stops the operation of the camera body 200. The menu button 218 performs various settings such as shooting conditions. A battery cover 219 provided on the lower surface of the camera body 200 can be opened and closed with respect to an opening of a battery chamber 602 described later, and is operated when the battery unit 100 is attached to and detached from the camera body 200.

  FIG. 4 is an exploded perspective view showing the internal configuration of the camera body 200. The camera main body 200 includes a front cover unit 300, an upper cover unit 400, a rear cover unit 500, and a main body unit 600. The front cover unit 300 is provided with a lens lock release button 203 and a battery lid 219. The upper cover unit 400 includes a release button 207, a main dial 208, a setting button 209, a display panel 210, a flash unit 211, a shooting mode setting dial 213, a main switch 217, and the like. The rear cover unit 500 is provided with a liquid crystal monitor 215, a sub dial 216, and a menu button 218. The main unit 600 includes a mount unit 201, a mount contact 202, a mirror box 204 in which a quick return mirror 206 is disposed, and a main body unit 601 attached to the rear of the mirror box 204 with screws.

  FIGS. 5A, 5 </ b> B, and 5 </ b> C are a front perspective view, a rear perspective view, and a bottom view, respectively, of a main body unit 601 constituting the main body unit 600 of the camera main body 200. 6 is an exploded perspective view of the main body 601 and FIG. 7 is a cross-sectional view taken along line AA in FIG. 8A and 8B are a front view and a side view of the camera body connector 606 mounted on the flexible printed circuit board 605, respectively.

  A battery chamber 602 in which the battery unit 100 is detachably housed is formed on the main body 601 on the grip 200a side of the camera body 200. An opening for attaching and detaching the battery unit 100 is formed below the battery chamber 602. A convex shape 602 a corresponding to the concave shape 103 of the battery unit 100 is formed inside the upper surface of the battery chamber 602. The battery discharge spring 603 is provided above the battery chamber 602 and applies a biasing force to the battery unit 100 in the −Y direction (downward) in order to discharge the battery unit 100. The battery lock lever 604 is fixed to the side surface of the battery chamber 602, and holds the battery unit 100 with a locking portion 604a. A camera main body connector 606 for electrical connection with the terminal group 108 of the battery unit 100 is mounted on the flexible printed circuit board 605. A camera body connector 606 inserted from the back side of the battery chamber 602 and provided on the upper portion of the battery chamber 602 is mounted on a hatched portion 605a of the flexible printed board 605 shown in FIG. Further, the flexible printed circuit board 605 is provided with a contact portion 605b for electrical connection with an external power supply device or the like different from the battery unit 100. The contact portion 605b is exposed from the opening 602b of the battery chamber 602.

  As shown in FIGS. 8A and 8B, the camera body connector 606 has a terminal contact piece group 607 formed of a plurality of metal plate spring-like terminal contact pieces protruding into the battery chamber 602. Is formed. The positive electrode contact piece 607a is provided at a position corresponding to the positive electrode terminal 108a and the terminal opening 102a of the battery unit 100. The negative electrode contact piece 607b is provided at a position corresponding to the negative electrode terminal 108b and the terminal opening 102b of the battery unit 100. The authentication contact piece 607c is provided at a position corresponding to the authentication terminal 108c and the terminal opening 102c of the battery unit 100. The temperature detection contact piece 607d is provided at a position corresponding to the temperature detection terminal 108d and the terminal opening 102d of the battery unit 100. The amount of protrusion of the positive electrode contact piece 607a and the negative electrode contact piece 607b from the camera body connector 606 is larger than the amount of protrusion of the authentication contact piece 607c and the temperature detection contact piece 607d from the camera body connector 606. Further, the protruding amounts of the positive electrode contact piece 607a and the negative electrode contact piece 607b, the authentication contact piece 607c, and the temperature detection contact piece 607d from the camera body connector 606 are substantially equal.

  The holding plate 608 is fixed to the battery chamber 602, and the battery discharge spring 603 and the flexible printed board 605 are fixed to the upper surface of the battery chamber 602. Further, the holding plate 608 holds the flexible printed circuit board 605 on which the camera body connector 606 is mounted with respect to the battery chamber 602 by the holding portion 608a.

  Next, an operation when the battery unit 100 is attached to the camera body 200 will be described. When the battery unit 100 is attached to the camera body 200, the battery lid 219 is operated to open the battery chamber 602, and the battery unit 100 is inserted into the battery chamber 602 from below the camera body 200.

  FIG. 9 is a diagram illustrating a state in which the battery unit 100 is inserted into the battery chamber 602.

  First, the battery unit 100 contacts the battery discharge spring 603 at the position shown in FIG. From this state, the battery unit 100 is further inserted against the spring force of the battery discharge spring 603.

  Next, at the position shown in FIG. 9B, the positive electrode terminal 108a and the negative electrode terminal 108b of the battery unit 100 abut on the positive electrode contact piece 607a and the negative electrode contact piece 607b of the camera body connector 606, respectively. The positive electrode contact piece 607a and the negative electrode contact piece 607b are larger in protrusion amount to the battery chamber 602 than the authentication contact piece 607c and the temperature detection contact piece 607d, and therefore, more than the authentication contact piece 607c and the temperature detection contact piece 607d. It contacts the corresponding terminal. From this state, the battery unit 100 is further inserted against the spring force of the battery discharge spring 603, the positive electrode contact piece 607a, and the negative electrode contact piece 607b.

  Next, at the position shown in FIG. 9C, the authentication terminal 108c and the temperature detection terminal 108d of the battery unit 100 are respectively connected to the authentication contact piece 607c and the temperature detection contact piece 607d which are communication terminal segments of the camera body connector 606. Abut. From this state, the battery unit 100 is further inserted against the spring force of the battery discharge spring 603, the positive electrode contact piece 607a, the negative electrode contact piece 607b, the authentication contact piece 607c, and the temperature detection contact piece 607d.

  Next, the battery unit 100 is held by the camera body 200 by the locking portion 604a of the battery lock lever 604 pressing the lower surface 101e of the battery case 101 of the battery unit 100 at the position shown in FIG. .

  As the battery unit 100 moves from the state in which the terminal group 108 of the battery unit 100 and the terminal contact group 607 of the camera body connector 606 start to contact to the state in which the battery unit 100 is attached to the camera body 200, the terminals The contact piece group 607 is deformed. At this time, the contact position of the terminal contact piece group 607 moves in the Z direction as shown in FIG. Section A is a moving section of the contact positions of the positive terminal 108 a and the negative terminal 108 b of the battery unit 100 and the positive contact piece 607 a and the negative contact piece 607 b of the camera body connector 606. The section B is a moving section of the contact positions of the authentication terminal 108c and the temperature detection terminal 108d of the battery unit 100 and the authentication contact piece 607c and the temperature detection contact piece 607d of the camera body connector 606. As for the contact start position of the terminal group 108 and the terminal contact piece group 607 which are one ends of the sections A and B, the position in the Z direction is substantially the same position. Further, the section A is longer than the section B. In the sections A and B, the cleaning action by the terminal contact piece group 607 works, and the reliability of electrical connection is improved.

  Finally, the battery lid 219 is operated to close the battery chamber 602.

  In the state where the battery unit 100 is mounted on the camera body 200, when a drop impact is applied to the camera body 200, the terminal group 108 of the battery unit 100 is instantaneously moved away from the terminal contact group 607 of the camera body connector 606. It moves. In that case, when the terminal group 108 momentarily exceeds the stroke of the terminal contact piece group 607, electrical disconnection (instantaneous interruption) may occur. In the present embodiment, in the terminal contact piece group 607, the protruding amount of the positive electrode contact piece 607a and the negative electrode contact piece 607b related to instantaneous interruption to the battery chamber 602 is increased, and the stroke is lengthened. Further, the terminal lengths of the positive electrode terminal 108a with which the positive electrode contact piece 607a abuts and the negative electrode terminal 108b with which the negative electrode contact piece 607b abuts are made longer than the terminal lengths of the other communication terminals of the terminal group 108. By doing so, the occurrence of instantaneous interruption is reduced and the reliability of electrical connection is increased.

  When removing the battery unit 100 from the camera body 200, the battery lid 219 is operated to open the battery chamber 602, and the latching portion 604a of the battery lock lever 604 located on the lower surface 101e of the battery unit 100 is operated and held. Is released. Then, the battery unit 100 is discharged from the battery chamber 602 by the spring force of the battery discharge spring 603 and the terminal contact piece group 607. Then, the battery lid 219 is operated to close the battery chamber 602.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

100 battery unit 105 battery cell 106 circuit board 108a positive terminal 108b negative terminal 108c authentication terminal (communication terminal)
108d Temperature detection terminal (communication terminal)
200 Camera body 602 Battery compartment

Claims (11)

A battery unit detachably housed in a battery chamber formed in an electronic device,
A battery cell that generates electromotive force and is rechargeable;
A communication terminal that communicates information of the battery unit with the electronic device, and a substrate on which a positive electrode terminal and a negative electrode terminal connected to the battery cell are formed,
Surface facing the contact piece of the electronic device in the accommodated state to the battery compartment, said communication terminal, said positive terminal, and the negative terminal are arranged side by side, prior Symbol communication terminal that put on the facing surface In the direction orthogonal to the direction in which the positive electrode terminal and the negative electrode terminal are arranged, the positive electrode terminal and the negative electrode terminal are longer in terminal length than the communication terminal,
The battery unit, wherein the positive electrode terminal, the negative electrode terminal, and the communication terminal are arranged so that distances from respective first ends to the outer shape of the substrate are substantially equal. The facing surface has a substantially rectangular parallelepiped shape,
The battery unit according to claim 1, wherein the positive terminal, the negative terminal, and the communication terminal are arranged side by side in a longitudinal direction of the facing surface.   The battery unit according to claim 1, wherein terminal lengths of the positive terminal and the negative terminal are substantially equal.   4. The battery unit according to claim 1, wherein the communication terminal is disposed so as to be sandwiched between the positive electrode terminal and the negative electrode terminal. 5.   5. The communication terminal according to claim 1, wherein the communication terminal is an authentication terminal that detects individual identification information set in the battery unit, and a temperature detection terminal that detects an internal temperature of the battery unit. The battery unit according to item.   The battery unit according to claim 5, wherein the positive electrode terminal, the temperature detection terminal, the authentication terminal, and the negative electrode terminal are arranged in this order. A battery case in which the battery cell and the substrate are held inside, a communication terminal opening for exposing the communication terminal, a positive terminal opening for exposing the positive terminal, and a negative terminal opening for exposing the negative terminal are formed. further comprising a pre-Symbol communications terminal, the positive terminal, and the direction of the negative electrode terminal are arranged, wherein the communication terminal opening, the positive terminal aperture, and the negative terminal openings are arranged side by side, front in the opposing surface serial communications terminals, claim wherein the positive electrode terminal, and in the direction perpendicular to the direction in which the negative electrode terminal are arranged, wherein the positive terminal aperture and said negative terminal aperture, wherein the longer opening length than the communication terminal openings The battery unit according to any one of 1 to 6.   The communication terminal opening, the positive electrode terminal opening, and the negative electrode terminal opening are formed so that distances from respective first ends to the outer shape of the battery unit are substantially equal. The battery unit described. The substrate is pre-Symbol communications terminals on one side in the longitudinal direction of the facing surface, the positive electrode terminal, and the negative terminal are arranged, and having a recess in the longitudinal direction on the other side of the opposing surface The battery unit according to any one of claims 1 to 8.   An electronic apparatus comprising the battery chamber in which the battery unit according to claim 1 can be stored. The electronic device includes a communication terminal contact that contacts the communication terminal, a positive contact that contacts the positive terminal, and a negative contact that contacts the negative terminal when the battery unit is housed in the battery chamber. Have
The electronic device according to claim 10, wherein the positive electrode contact piece and the negative electrode contact piece have a larger protruding amount toward the battery unit than the communication terminal contact piece.