JP2000011979A - Feeding structure for loading from battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery holder with no mounting polarity and a circuit thereof for a button battery and the like. SOLUTION: When a button battery 18 is mounted on a RAM card, a terminal arranged in the RAM card side is positively pressed on a plus electrode of the button battery 18, while a terminal B and a terminal C are pressed to either of the plus electrode or a minus electrode in the installation of the button battery 18. Therefore, the terminals B, C are connected to the button battery 18 via diodes respectively, and power supply to a load 24 can be carried out when the button battery 18 is set in either condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply structure for a load by a battery such as a button battery.

[0002]

2. Description of the Related Art Today, portable electronic devices such as memory cards, electronic desk calculators, mobile phones, and electronic watches are widely used. In such an electronic device, a battery is usually used as a power supply. For example, it is a dry battery such as AA or AAA, a lithium battery, or the like, and its shape also includes a square shape, a button shape, and the like.

[0003]

The above-mentioned battery has a polarity, and it is necessary to mount the battery in use so that the polarity is not wrong. There is also an instruction on the direction of mounting the battery on the device side so that the polarity is not mistaken.

[0004] However, for example, in the case of a button-type battery, there is a possibility that the polarity may be erroneously reversed for mounting reasons. If such reverse mounting is performed, there is a risk that the battery may be damaged. Further, since power is not supplied to the device, problems such as data loss occur on the device side.

[0005] In order to solve the above problems, an object of the present invention is to provide a structure for supplying power to a load by a battery capable of supplying power regardless of the mounting polarity.

[0006]

According to the present invention, there is provided a battery having a first contact portion having a first polarity and a second contact portion having a second polarity. A first contact terminal that contacts the second contact portion when the battery is filled in the battery holder in the first position; and a second contact terminal that contacts the second terminal when the battery is filled in the battery holder in the second position. A second contact terminal that contacts the contact portion of the first contact portion; and the first contact portion also when the battery is filled in the battery holder in one of the first position and the second position. This can be achieved by providing a structure for supplying power to a load by a battery having a third contact terminal that contacts the battery.

Here, the first polarity is, for example, a positive polarity (+ positive polarity), the first contact portion is a + (plus) electrode of the battery, and the second polarity is, for example, a negative polarity (−).
Negative polarity), and the second contact portion is a negative electrode of the battery. The first position is when the battery is inserted correctly, and the second position is when the battery is inserted with the polarity reversed. On the other hand, the first contact terminal on the device side contacts with either the + (plus) electrode or the-(minus) electrode when the battery is correctly inserted and when the polarity is incorrectly inserted, and the third contact terminal on the device side. The contact terminal is configured to be in pressure contact with only the + (plus) electrode regardless of whether the battery is inserted correctly or the polarity is incorrectly inserted.

In the above configuration, when the battery is mounted on the device, the third contact terminal provided on the device always contacts the + (plus) electrode of the battery, and the first contact terminal and the second contact terminal. When the battery is installed, the terminal is the + (plus) electrode or-
(Minus) Press against any of the electrodes. Therefore, by connecting the load to the first contact terminal and the second contact terminal via the rectifier, power can be supplied to the load regardless of the state of the battery. .

With this configuration, the battery can be mounted on the device without being affected by the polarity of the battery, and an extremely convenient structure for supplying power to the load by the battery can be provided.

According to a second aspect of the present invention, in the first aspect, the first polarity is, for example, a positive polarity and the second polarity is a positive polarity.
Has a negative polarity, for example. In this example, the first polarity is
And the second polarity. The first polarity may be negative, and the second polarity may be positive.

According to a third aspect of the present invention, in the first aspect, the first and second contact terminals are connected to a ground side circuit of a load, and the third contact terminal is connected to a high voltage side circuit of the load. It is connected to the.

This embodiment is also an example. Conversely, the first and second contact terminals are connected to the high voltage side circuit of the load, and the third contact terminal is connected to the ground side circuit of the load. It may be. However, in this case, it is necessary to connect a rectifier such as a diode in reverse.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the first and second contact terminals are provided between the first and second contact terminals and a ground side circuit of the load from the ground side circuit. Rectifiers for flowing current toward the two contact terminals are inserted.

According to a fifth aspect of the present invention, in the first aspect, the rectifier is, for example, a Schottky barrier diode. Note that the rectifier of the present invention is not limited to the above-described Schottky barrier diode.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. <First Embodiment> FIG. 1 is a view for explaining a power supply structure to a load by a battery according to the first embodiment. In this example, a button type battery (hereinafter, referred to as a button battery) is used as the battery.
, A RAM card is used as an electronic device, and the button battery is used in the RAM card.

In FIG. 1, reference numeral 1 denotes a RAM card;
It incorporates a plurality of static RAM (SRAM) chips. Reference numeral 2 denotes a battery tray on which button batteries are placed. Button batteries described later are placed on the battery tray 2,
Store in the direction of the arrow. Reference numeral 3 denotes a button battery hold switch, which is operated, for example, when removing the button battery stored in the RAM card 1. further,
Reference numeral 4 denotes a write protect switch that is operated when data writing to the SRAM is prohibited.

FIG. 2 is an assembly drawing of the RAM card 1 described above. The board assembly 6 shown in FIG. 7B is mounted in the concave portion 8 of the resin frame 7 shown in FIG. 7C, and a top cover 9 processed by, for example, sheet metal shown in FIG. The lower cover 10 of the sheet metal processing shown in FIG.

The board assembly 6 shown in FIG. 1B has a configuration in which, for example, six SRAM chips 12 are mounted on a printed circuit board 11. The write protect switch 4 is mounted in front of the board assembly 6. A connector 13 is mounted behind the board assembly 6. The SRAM chip 12 has a configuration to be described later.
Data is stored in a memory in the M chip 12, and data is read from this memory.

Also, three springs are attached to the board assembly 6. These springs 13 to 15 function as contact terminals. A spring 13 as a third contact terminal is attached to the front side surface of the printed circuit board 11 and has elasticity in the direction of the arrow. Further, a spring 14 as a second contact terminal is attached to the front upper surface of the printed circuit board 11, and the tip has elasticity in the vertical direction. Further, a spring 15 as a first contact terminal is attached to the lower front surface of the printed circuit board 11, and its tip also has elasticity in the vertical direction.

Each of the springs 13 to 15 is formed of a metal elastic material such as phosphor bronze or stainless steel, and contacts a positive electrode (+) or a negative electrode (-) of the button battery when a button battery described later is mounted. For example, power is supplied to the SRAM chip 12.

Since the spring 14 is driven up and down, the corresponding area of the top cover 9 is coated with an insulating coating 16a. Further, since the spring 15 is also driven up and down, an insulating coating 16b
Is given.

FIG. 3 shows a button battery tray 2 and a button battery 1.
8 is a diagram for explaining the configuration of FIG. The button battery tray 2 has a mounting portion 19 for a button battery 18. The mounting portion 19 has a concave shape with a notch, and the button battery 18 is set in the mounting portion 19. 18 'is a view for explaining the configuration of the button battery 18, 20 is a planar shape of the button battery 18, 21 is a side shape, and 22 is a back surface shape.

As shown in the figure, the button battery 18 used in this example has + (plus) as the first polarity on the plane side and-(minus) as the second polarity on the back side. However, as will be described later, in this example, there is no problem whether the button battery 18 is placed on either side.

On the other hand, FIGS. 4 (a) and 4 (b) explain the connection configuration between the button battery 18 and each of the springs 13 to 15 when the button battery 18 is placed on the button battery tray 2 and mounted on the RAM card 1. FIG. In addition, the above-mentioned button battery tray 2
Is mounted on the RAM card 1, and the springs 13 to 15 are pressed against the button battery 18, so that the above-described configuration of the button battery tray 2 and the springs 13 to 15 is referred to as a battery holder.

As shown in FIGS. 3A and 3B, when the button battery 18 is mounted on the RAM card 1 by the battery holder, the spring 13 is pressed against the peripheral surface of the button battery 18 and the spring 14 is The spring 1 is pressed against the upper surface of the battery 18.
5 is pressed against the lower surface of the button battery 18. Each spring 1
Wiring patterns are connected to the fixing portions 3 to 15, ie, the fixing portions of the springs 13 to 15 on the printed circuit board 11, and an electronic circuit including the button battery 18 is configured.

FIG. 5 is a diagram for explaining this circuit configuration.
Incidentally, in FIG.
The terminals (contact terminals) of No. 5 are A to C, the terminal A is the connection point of the spring 13 to the button battery 18, the terminal B is the connection point of the spring 14 to the button battery 18, and the terminal C is the button battery 1
8 as a connection point of the spring 15. A load 24 shown in FIG. 2 is a power load for storing data in the above-described SRAM chip 12, reading data from the SRAM 12, and performing various controls.

In the circuit shown in FIG. 5, the button battery 18 and the load 24 are connected in parallel,
A DC current is supplied from the electrodes to the load 24, and the current flowing through the load 24 flows into the-(minus) electrode of the button battery 18. Here, in this example, + (plus) of the button battery 18
Although an electrode and a-(minus) electrode are shown, a + (plus) electrode may be called a high voltage side electrode and a-(minus) electrode may be called a ground side electrode.

Two Schottky barrier diodes (hereinafter simply referred to as diodes) 25 and 26 are connected between the button battery 18 and the load 24. The diode 25 has a cathode (K) side connected to the + (plus) electrode of the button cell 18, and an anode (A) side connected to the load 24. The cathode (K) of the diode 26 is connected to the negative electrode of the button battery 18, and the anode (A) is connected to the load 24. Here, the diodes 25 and 26 are Schottky barrier diodes as described above. The Schottky gate electrodes are provided directly on the N-type semiconductor, and the function of blocking the reverse voltage at the contact surface between the metal and the semiconductor is utilized. It is a diode.

The load 24 can be supplied with power from a power source other than the button battery 18 described above. For example, a power supply (Vcc) can be supplied from a power supply device obtained by rectifying commercial power.

FIG. 6 is a diagram for explaining the circuit configuration of the entire RAM card 1 described above. The part E in the figure is a power supply part, and is different from the circuit configuration in FIG.
7 is a circuit added. The memory control unit F includes the SRAM chip 12 and a control circuit that reads and writes data from and to the SRAM chip 12.

First, the power supply unit E has a configuration in which a power supply control circuit 27 is added to the circuit shown in FIG. 5 as described above. Power is supplied to the load 24 as a power supply. The power supply control circuit 27 controls the switching between the two power supplies. The load 24 includes not only a memory control unit F to be described later but also other loads, and power can be supplied to these loads via the output terminals BVD1, BVD2, and the like.

The memory control unit F includes a control input buffer / address decoder 28, an address input buffer 29,
It comprises memories 30, 31, an attribute memory 32, a data input / output buffer / selector 33, a pull-up resistor circuit 34, and pull-down resistor circuits 35, 36. The memory 30 is a memory of an odd address (odd address), and the memory 31 is a memory of an even address (even address), and is selected by a select (CE1, CE2) signal. Writing of data to the memories 30 and 31 is performed by outputting a write (WE) signal, and outputting of data from the memories 30 and 31 is performed by an OE signal. The attribute memory 32 is selected by a REG signal.

The write protect switch 4 is protected, for example, by moving the switch downward, and is released by moving the switch upward.

Here, when writing data to the memories 30 and 31, for example, the address data (A1 to A16) is transferred to the address input buffer 2 via an address bus (not shown).
9 and a write (WE) signal to a control input buffer.
The data is output to the memories 30 and 31 via the address decoder 28. The supply of the write (WE) signal described above can be achieved by setting the corresponding input of the control input buffer / address decoder 28, which is normally maintained at a high level by a pull-up resistor, to a low level. The selection of the memories 30 and 31 at the time of data reading is performed by the aforementioned select (CE1, CE2) signals.

On the other hand, when reading data from the memories 30 and 31, the memory 30 and 31 are selected by the above-mentioned select (CE1 and CE2) signals, and the OE signal is output. The data read from the memories 30 and 31 is supplied to the data input / output buffer / selector 33 in 8-bit units.
6 to a data bus (not shown) (data D
0-D15).

It should be noted that data can be accessed in the attribute memory 32 in the same manner. The power supply operation of the above-structured power supply structure to the load will be described.

First, the case where the owner of the RAM card 1 correctly inserts the button battery 18 will be described. In this case, the button battery 18 is correctly placed on the button battery tray 2 as shown in FIG. 3 (this state is referred to as a first state). That is, as shown in FIG. 3, it is mounted so that the + (plus) electrode faces upward. Next, in this state, FIG.
When the button battery 18 (button battery tray 2) is inserted in the direction indicated by the arrow, the three springs 13 to 15 at the time of completion of the insertion, the + (plus) electrode of the button battery 18 or-(minus).
Press against the electrode. The connection at this time is as shown in FIG.
The terminal A is connected to the +
The terminal B presses from the upper surface of the button battery 17 to the + (plus) electrode of the button battery 18, and the terminal C presses from the lower surface of the button battery 17 to the negative terminal of the button battery 18.
(Minus) Pressed against the electrode.

Therefore, in this case, a current flows according to the circuit shown in FIG. That is, a current is supplied from the + (plus) electrode of the button battery 18 to the load 24 and further flows through the diode 26 to reach the-(minus) electrode of the button battery 18. Therefore, in this case, power is supplied from the button battery 18 to the load 24 without any problem.

Next, a case where the owner of the RAM card 1 erroneously inserts the button battery 18 will be described. In this case, the button batteries 18 are placed on the button battery tray 2 with the polarity reversed. That is, as shown in FIG. 9, the − (minus) electrode is placed face up. Therefore, when the button battery 18 (button battery tray 2) is inserted into the RAM card 1 in this state, when the insertion is completed, the three springs 13 to 15 are connected to the + (plus) electrode of the button battery 18,
Or, it is pressed against the-(minus) electrode. As shown in FIG. 10, the connection at this time is such that the terminal A presses the + (plus) electrode of the button battery 18 from the peripheral surface of the button battery 17 and the terminal B
Is pressed from the upper surface of the button battery 18 to the-(minus) electrode, and the terminal C is pressed from the lower surface of the button battery 18 to the + (plus) electrode.

Therefore, in this case, a current flows on the circuit as shown in FIG. That is, the button battery 18
Current is supplied to the load 24 from the + (plus) electrode through the terminal A, the current further flows through the diode 25, and the terminal B
Through the negative electrode of the button battery 18.

Therefore, as described above, the button battery 18
The springs 13 to 15 are connected to the + (plus) electrode of the button battery 18 or-(minus) even if the polarity of
When pressed against the electrode, and particularly when the terminal A is pressed against the + (plus) electrode of the button battery 18, a current is supplied from the button battery 18 to the load 24 via the terminal A, and the diode 25 or A current can be supplied to the-(minus) electrode via 26.

Therefore, with this configuration, power can be supplied to the load 24 without any problem even if the button battery 18 is mounted with the wrong polarity. <Second Embodiment> Next, a second embodiment of the present invention will be described.

This example is different in the shape of the battery, and describes an example of application to a rectangular battery having the shape shown in FIG. In this example, the RAM card 1 shown in FIG.
And the overall configuration of the RAM card 1 is the same as that of the first embodiment. Therefore, a plurality of static RAM (SRAM) chips are built in the RAM card 1, and a button battery tray 2 on which a button battery is placed is stored in front of the RAM card 1.
The button battery is placed on the top, and the button battery is stored in the RAM card 1. The RAM card 1 is also provided with a button battery hold switch 3 and a write protect switch 4.

The above-described RAM card 1 is also assembled as shown in FIG. 2 and the substrate assembly 6 shown in FIG. 2B is mounted in the recess 8 of the resin frame 7 shown in FIG. Then, for example, an upper cover 9 processed by sheet metal as shown in FIG. 7A is attached from above, and a lower cover 10 formed by sheet metal as shown in FIG. The board assembly 6 has three springs 13 to 13.
15 is attached, the spring 13 is attached to the front side surface of the printed circuit board 11, the spring 14 is attached to the upper front surface of the printed circuit board 11, and the spring 15 is attached to the printed circuit board 11.
Are attached to the front lower surface, and each has elasticity.
In the above configuration, when the battery 38 shown in FIG. 12 is placed on the button battery tray 2 and inserted into the RAM card 1, the battery 3
8 is set correctly, the battery 38 and each of the contacts A to C
Are connected as shown in FIG. That is, as shown in the drawing, the terminal A is pressed against the + (plus) electrode from the peripheral surface of the battery 38, the terminal B is pressed against the + (plus) electrode of the battery 38 from the upper surface, and the terminal C is pressed from the lower surface to the battery 38. To the minus (-) electrode. Therefore, in this case, FIG.
A current flows as in the circuit shown in FIG. That is, the battery 38
A current is supplied from the + (plus) electrode to the load 24, and further flows through the diode 26 to reach the-(minus) electrode of the battery 38.

Next, when the owner of the RAM card 1 inserts the battery 38 by mistake,
The electrode is placed on top. Therefore, in this state, R
When the battery 38 is inserted into the AM card 1, as shown in FIG. 14, the terminal A is pressed against the + (plus) electrode of the battery 38 from the peripheral surface of the battery 38, and the terminal B is pressed against the-(minus) electrode from the upper surface. , The terminal C is pressed against the + (plus) electrode from the lower surface.

Therefore, in this case, a current flows on the circuit as shown in FIG. That is, the battery 3
Current is supplied to the load 24 from the + (plus) electrode 8 through the terminal A, and the current further flows through the diode 25 and reaches the-(minus) electrode of the battery 38 through the terminal B.

As described above, even in the case of this example, even when the battery 38 is mounted on the RAM card 1 with the wrong polarity, the springs 13 to 15 are connected to the + (plus) electrode of the battery 38 or-.
The current is supplied from the battery 38 to the load 24 via the terminal A, and the diode 25 is pressed against the (negative) electrode. Or through 26-(minus)
A current can be applied to the electrodes.

With this configuration, even if the button battery 38 is mounted with the wrong polarity, the load 24 can be mounted without any problem.
Can be supplied with power. <Third Embodiment> Next, a third embodiment of the present invention will be described.

This example is also different in the shape of the battery, and describes an example of application to a battery 39 having the shape shown in FIG. In this embodiment, the power supply structure to the load by the battery shown in FIG. 1 is used, and the entire configuration of the RAM card 1 is the same as that of the first embodiment. Therefore, a plurality of static RAM (SRAM) chips are built in the RAM card 1, and a battery tray for mounting a button battery is stored in front of the RAM card 1, and the button battery is mounted on the battery tray 2. , In the direction of the arrow. The RAM card 1 is also provided with a button battery hold switch 3 and a write protect switch 4.

The above-described RAM card 1 is also assembled as shown in FIG. 2, and the substrate assembly 6 shown in FIG. 2B is mounted in the recess 8 of the resin frame 7 shown in FIG. Then, for example, an upper cover 9 processed by sheet metal as shown in FIG. 10A is attached from above, and a lower cover 10 formed by sheet metal as shown in FIG. The board assembly 6 has three springs 13 to 13.
15 is attached, the spring 13 is attached to the front side surface of the printed circuit board 11, the spring 14 is attached to the upper front surface of the printed circuit board 11, and the spring 15 is attached to the printed circuit board 11.
Are attached to the lower surface on the front side, and each has elasticity. However, since all the springs 13 to 15 used in this example are pressed against the side peripheral surface of the battery 39, they have the configuration shown in FIG.

That is, there are three springs having elastic force in the direction of the arrow, which are arranged vertically, and
3, 15 are arranged in order. Therefore, in this case, the terminals B, A, and C are arranged in this order.

In the above configuration, the battery 3 shown in FIG.
9 is placed on the button battery tray 2 and inserted into the RAM card 1, and if the battery 39 is correctly set, the battery 3
9 and the terminals A to C are set as shown in FIG. That is, as shown in the figure, the terminal A is pressed against the + (plus) electrode from the peripheral surface of the battery 39, the terminal B is also pressed against the + (plus) electrode of the battery 39 from the upper peripheral surface, and the terminal C is Terminal A
The lower surface is pressed against the negative electrode of the battery 39. Therefore, in this case, the circuit is the same as the circuit shown in FIG. That is, a current is supplied from the + (plus) electrode of the battery 39 to the load 24 and further flows through the diode 26 to reach the-(minus) electrode of the battery 39.

Next, when the owner of the RAM card 1 erroneously inserts the battery 39 reversely,
The electrode is placed on top. Therefore, in this state, R
When the battery 39 is inserted into the AM card 1, the terminal A is pressed against the + (plus) electrode of the battery 39, the terminal B is pressed against the-(minus) electrode, and the terminal C is + (plus), as shown in FIG. Press against the electrode.

Therefore, in this case, a current flows on the circuit as shown in FIG. That is, a current is supplied from the + (plus) electrode of the battery 39 to the load 24 via the terminal A, and the current further flows through the diode 25 and reaches the-(minus) electrode of the battery 39 via the terminal B.

As described above, even in the case of this example, even when the battery 39 is mounted on the RAM card 1 with the wrong polarity, the springs 13 to 15 are connected to the + (plus) electrode of the battery 39 or-.
The current is supplied from the battery 39 to the load 24 via the terminal A, and the diode 25 is pressed against the (negative) electrode, particularly, in any case, the terminal A is pressed against the + (plus) electrode of the battery 39. Or through 26-(minus)
A current can be applied to the electrodes.

With this configuration, even if the button battery 39 is installed with the wrong polarity, the load 24 can be mounted without any problem.
Can be supplied with power. In the above description of the three embodiments, the button battery 18 and the like are applied to the RAM card 1. However, the applicable devices are not limited to the above-described RAM card.
The present invention can be similarly applied to a case where the present invention is used for a device such as a clock.

The diode is not limited to the Schottky barrier diode, and another diode may be used.

[0058]

As described in detail above, according to the present invention, the battery can be mounted on the device without being affected by the polarity of the battery, and a very convenient structure for supplying power to the load by the battery is provided. be able to.

Further, the shape of the battery is not limited to the button type battery, but may be applied to a battery shape such as a square shape.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a power supply structure to a load by a battery according to an embodiment of the present invention.

FIG. 2A is an assembly diagram of a RAM card, and is a configuration diagram of a sheet metal processed top cover; FIG. 2B is an assembly diagram of a RAM card, which is a configuration diagram of a board assembly;
(C) is an assembly drawing of a RAM card, which is a configuration diagram of a resin frame, (d) is an assembly drawing of a RAM card,
It is a lineblock diagram of the bottom cover of sheet metal processing.

FIG. 3 is a diagram illustrating a configuration of a battery holder and a button battery.

FIG. 4 (a) shows a button battery placed on a battery holder;
It is a figure explaining connection structure of a button battery and each spring at the time of attaching to an AM card, and (b) is the sectional view.

FIG. 5 is a diagram illustrating a configuration of a circuit.

FIG. 6 is a diagram illustrating a circuit configuration of the entire RAM card.

FIG. 7 is a diagram illustrating a connection relationship between the button battery and each spring when the button battery is correctly connected in the first embodiment.

FIG. 8 is a diagram illustrating the flow of current when correctly connected.

FIG. 9 is a diagram showing a state when the button battery is erroneously placed in the battery holder in the first embodiment.

FIG. 10 is a diagram for explaining a connection relationship between the button battery and each spring when the button battery is incorrectly connected in the first embodiment.

FIG. 11 is a diagram illustrating the flow of current when a connection is made erroneously.

FIG. 12 is a diagram illustrating a battery configuration according to a second embodiment.

FIG. 13 is a diagram for explaining a connection relationship between a button battery and each spring when correctly connected in the second embodiment.

FIG. 14 is a diagram illustrating a connection relationship between a button battery and each spring when the button battery is incorrectly connected in the second embodiment.

FIG. 15 is a diagram illustrating a battery configuration according to a third embodiment.

FIG. 16 is a diagram illustrating a configuration of a spring according to a third embodiment.

FIG. 17 is a diagram illustrating a connection relationship between a button battery and each spring when correctly connected in the third embodiment.

FIG. 18 is a diagram illustrating a connection relationship between a button battery and each spring when the button battery is incorrectly connected in the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 RAM card 2 Button battery tray 3 Button battery hold switch 4 Write protect switch 6 Board assembly 7 Resin frame 8 Depression 9 Top cover 10 Bottom cover 11 Printed circuit board 12 SRAM 13-15 Spring 16a, 16b Insulation coating 17 Battery holder 18, 18 ′ Button battery 19 Placement part 20 Flat shape of button battery 21 Side shape of button battery 22 Back shape of button battery 24 Load 27 Power supply control circuit 28 Input buffer / address decoder 29 Address input buffer 30, 31 Memory 32 Attribute memory 33 Data I / O buffer selector 34 Pull-up resistor circuit 35, 36 Pull-down resistor circuit 38, 39 Battery E Power supply unit F Memory control unit A1-A16 Address data D0-D15 Data WE Write signal SE1, SE2 Select signal Terminal A Corresponds to spring 13 Terminal B Corresponds to spring 14 Terminal C Corresponds to spring 15

Claims (5)

[Claims] 1. A battery having a first contact portion having a first polarity and a second contact portion having a second polarity, wherein the battery is filled in a battery holder in a first position. A first contact terminal for contacting the second contact portion, and when the battery is filled in the battery holder in the second position,
A second contact terminal that contacts the second contact portion; and the battery is filled in the battery holder in any one of the first posture and the second posture.
And a third contact terminal for contacting the first contact portion. 2. The power supply structure according to claim 1, wherein the first polarity has a positive polarity and the second polarity has a negative polarity. 3. The load control device according to claim 1, wherein the first and second contact terminals are connected to a ground side circuit of the load, and the third contact terminal is connected to a high voltage side circuit of the load. A power supply structure to a load by the battery according to 1. 4. A rectifier for flowing a current from the ground side circuit to the first and second contact terminals is provided between the first and second contact terminals and a ground side circuit of the load. The power supply structure for a load by a battery according to claim 1, wherein the power supply structure is inserted. 5. The structure according to claim 1, wherein the rectifier is a Schottky barrier diode.