JPH11288332A - Electronics - Google Patents

Abstract

(57) [Summary] (Modifications) [PROBLEMS] To provide an electronic device that can be used without shutting down an electronic device main body and an extension device within an amount of power that can be supplied by an AC adapter. SOLUTION: A personal computer main body 100 includes a microcontroller 1006 for controlling power supply. In addition, an AC adapter incorporating a storage unit storing the power value that can be supplied by itself is used as a power supply source, and a reading unit that reads stored information in the storage unit is provided. The storage means is ROM
It is. An identifier is assigned to each of the plurality of extension devices, and each extension device has a storage unit for storing the identifier therein and a reading unit for reading information stored in the storage unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electronic device such as a notebook personal computer.

[0002]

2. Description of the Related Art Conventionally, in an electronic device including an electronic device main body and a plurality of extension devices detachably connected to the electronic device main body, all of the power supply sources are AC adapters connected to the electronic device main body. Or a battery, or an extension device in addition to them, required an AC adapter or a battery.

[0003]

However, in the above-described conventional example, there is no problem with a combination device having a power supply source for each of the electronic device main body and the extension device, but only for the electronic device main body. The following problems have been encountered in a unitable electronic device having no power supply source.

[0004] Since the power supplied to the AC adapter connected to the electronic device main body is constant, if the number of extension devices increases, the power supplied to the AC adapter will be exceeded. Therefore, the AC adapter may shut down and the electronic device may stop. There was sex.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide an electronic device main body and an extension device within an amount of power that can be supplied by an AC adapter. It is an object of the present invention to provide an electronic device that can be used without shutting down a computer.

[0006]

According to an aspect of the present invention, there is provided an electronic apparatus comprising an electronic apparatus main body and a plurality of extension devices detachably connected to the electronic apparatus main body. In addition, the electronic device main body is provided with power control means for controlling power.

Further, in order to achieve the above object, a second aspect is provided.
The electronic device according to claim 1, wherein the electronic device according to claim 1,
An AC adapter having a built-in storage unit storing a power value that can be supplied by itself is used as a power supply source, and a reading unit that reads stored information in the storage unit is provided.

[0008] In order to achieve the above object, a third aspect is provided.
The electronic device according to claim 1, wherein the electronic device according to claim 1,
The storage means is a ROM (Read Only Memory).

[0009] In order to achieve the above object, the present invention provides a fourth aspect.
The electronic device according to claim 1, wherein the electronic device according to claim 1,
An identifier is attached to each of the plurality of extension devices,
Each of the extension devices is provided with a storage means for storing the identifier therein, and a reading means for reading information stored in the storage means.

[0010] In order to achieve the above object, the present invention provides a semiconductor device comprising:
The electronic device according to claim 4, wherein
The identifier is an identification number.

[0011] In order to achieve the above object, the present invention provides a semiconductor device comprising:
The electronic device according to claim 4, wherein
The storage means is a ROM (Read Only Memory).

According to another aspect of the present invention, there is provided a computer system comprising:
The electronic device according to claim 1, wherein the electronic device according to claim 1,
3. The power supply control unit reads the amount of power supply from the currently connected AC adapter using the reading unit in the electronic device according to claim 2, after the AC adapter serving as a power supply source is connected. I do.

According to another aspect of the present invention, there is provided a computer system comprising:
The electronic device according to claim 1, wherein the electronic device according to claim 1,
4. The electronic power supply according to claim 3, wherein the power supply control unit supplies power to a storage unit in each of the extension devices when the extension device is connected when an AC adapter as a power supply source is connected and operable. An identifier stored in a storage unit inside each of the extension devices is read using a reading unit in the device.

[0014] In order to achieve the above object, the present invention provides a ninth aspect.
The electronic device according to claim 1, wherein the electronic device according to claim 1,
3. An electronic apparatus main body according to claim 2, wherein when one or a plurality of extension devices are connected to the electronic apparatus main body and then an AC adapter is connected as a power supply source, the electronic device main body power supply control means controls the reading means in the electronic device according to claim 2. After reading the power supply from the currently connected AC adapter using
An identification number stored in a storage unit inside each of the extension devices is read by using a reading unit in the electronic device according to the third aspect.

[0015] Further, in order to achieve the above object, a first aspect is provided.
The electronic device according to claim 1, wherein the electronic device according to claim 1, a connector that electrically connects the electronic device body and the extension device, and an engagement unit that mechanically connects the electronic device body and the extension device. An operating body for operating the engaging means, and a detecting means for detecting that the engaging means is closed by the operating body and transmitting a detection signal to the power control means. .

Further, in order to achieve the above object, a first aspect is provided.
An electronic device according to a first aspect is the electronic device according to the tenth aspect, wherein the operating body is a lever.

Further, in order to achieve the above object, a first aspect is provided.
2. The electronic device according to claim 1, wherein the connector electrically connects the extension device to another extension device, and the engagement unit mechanically connects the extension device to another extension device. And an operating body for operating the engaging means, and detecting means for detecting that the engaging means is closed by the operating body and transmitting a detection signal to the power control means. And

Further, in order to achieve the above object, a first aspect is provided.
An electronic device according to a third aspect is the electronic device according to the twelfth aspect, wherein the operating body is a lever.

Further, in order to achieve the above object, a first aspect is provided.
13. The electronic device according to claim 10, wherein when the power control unit receives a detection signal from the detection unit, the electronic device determines whether to supply power to the extension device. Means, and control means for controlling the start of power supply to the extension device when the determination means determines to supply power to the extension device.

[0020] In order to achieve the above object, a first aspect is provided.
An electronic device according to a fifth aspect is the electronic device according to the first aspect, wherein a plurality of AC adapters having different powers can be connected to the electronic device main body.

According to another aspect of the present invention, there is provided a computer system comprising:
6. The electronic device according to claim 1, wherein when an AC adapter other than the AC adapter in the electronic device according to claim 2 is connected, the power supply control unit includes the electronic device main body and the extension device. The power supply is controlled so as not to supply power to the power supply.

[0022] In order to achieve the above object, a first aspect is provided.
7. The electronic device according to claim 7, wherein the power supply capacity from the AC adapter is smaller than the power consumption of the electronic device main body and all the extension devices connected to the electronic device main body. In addition, a setting means is provided for setting the order of the extension devices to be separated from the electronic device main body when the user of the electronic device turns on the power of the electronic device main body alone.

[0023] In order to achieve the above object, a first aspect is provided.
An electronic device according to an eighth aspect is the electronic device according to any one of the first to sixteenth or seventeenth aspects, wherein the electronic device is a computer.

Further, in order to achieve the above object, a first aspect is provided.
An electronic device according to a ninth aspect is the electronic device according to any one of the first to sixteenth or seventeenth aspects, wherein the electronic device is a personal computer.

Further, in order to achieve the above object, a second aspect is provided.
The electronic device according to claim 0 is the electronic device according to any one of claims 1 to 16 or 17, wherein the electronic device is a notebook personal computer.

Further, in order to achieve the above object, a second aspect is provided.
The electronic device according to the first aspect is the electronic device according to any one of the first to sixteenth or seventeenth aspects, wherein the electronic device is a desktop personal computer.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are perspective views showing the structure of an electronic device according to an embodiment of the present invention. The electronic device shown in FIG. 1 is a notebook personal computer (hereinafter, referred to as a personal computer). In addition, a personal computer main body (electronic device main body) 100 and a plurality of (only one is shown in FIG. 1) detachably connected to the personal computer main body (hereinafter, referred to as a personal computer main body) 100. And an extension device 200.

FIG. 1 shows a personal computer 100 and an extension device 2.
FIG. 2 shows a case where the personal computer 100 and the extension device 200 are separated and the personal computer 100 is not used. .

The personal computer body 100 includes a display device 101,
Keyboard input device 102, hard disk drive 1
03 and a floppy disk drive 104.

The extension device 200 includes a CD-ROM (Compact Disk Read Only Memory) drive 201
And an extension board for communication, sound source and the like (not shown). The extension device 200 has a pair of fixed claws 202 on the right side and a pair of movable claws 203 on the left side in FIG.
Are provided respectively. The pair of movable claws 203 are linked with a separation lever (open / close lever) 204. The separation lever 204 is provided on the left side surface as shown in FIG.
A connector 205 is provided at an intermediate portion between the pair of movable claws 203 so as to be able to move minutely. On both sides of the connector 205, engagement pins 206 are protruded.

FIG. 3 shows the configuration of the back surface of the personal computer main body 100 and an extension device (hereinafter referred to as a first extension device) 20.
FIG. 3 is a diagram illustrating a configuration of a back surface of a zero. As shown in the figure, a locking hole 105 for locking the fixed claw 202 of the first extension device 200 is provided on the back surface of the personal computer main body 100, and the first extension device 2
00, a locking hole 106 for locking the movable claw 203, and a connector 10 for connecting to the connector 205 of the first extension device 200.
7. An engagement hole 108 that engages with the engagement pin 206 of the first extension device 200 is provided.

On the back surface of the first extension device 200,
A locking hole 20 for locking to a fixing claw 202a of another extension device (hereinafter, referred to as a second extension device) 200a shown in FIG.
7, locking holes 208 for locking the movable claws 203a of the second extension device 200a, connectors 2 of the second extension device 200a
05a, the second extension device 20
An engagement hole 210 that engages with the engagement pin 206a of Oa is provided.

The back surface of the second extension device 200a has the same configuration as the back surface of the personal computer 100 and the back surface of the first extension device 200 shown in FIG.

FIGS. 4 and 5 are partially cutaway side views for explaining a method of combining (connecting) the personal computer main body 100 and the first extension device 200. FIG.

The personal computer 100 in the state shown in FIG.
In order to unite the first extension device 200 with the first extension device 200, first, FIG.
As shown in the figure, the separation lever 20 of the first extension device 200
4 in the direction of arrow A to open the first extension device 2
00 with the movable claw 203 tilted outward, hook the locking hole 105 on the right side of the personal computer body 100 onto the fixed claw 202 of the personal computer body 100, and then lower the left side of the personal computer body 100, thereby causing the first expansion device 200 engagement pins 206
The connector 107 of the personal computer 100 and the connector 205 of the first extension device 200 are connected when the engagement with the engaging hole 108 of the personal computer 100 is completed. afterwards,
By pushing the closing lever 204 in the direction of arrow B and closing it, the movable claw 203 of the first extension device 200 is locked in the locking hole 106 of the personal computer main body 100, and as shown in FIG. The combination with the extension device 200 is completed.

FIGS. 6 to 8 are partially cutaway side views for explaining a method of combining (connecting) the first extension device 200 and the second extension device 200a.

The first extension device 20 in the state shown in FIG.
0 and the second extension device 200a, first,
As shown in FIG. 7, the separation lever 204a of the second extension device 200a is pulled outward in the direction of arrow A to open outward, and the first extension is performed in a state where the movable claw 203a of the second extension device 200a is inclined outward. After hooking the locking hole 27 on the right side of the device 200 with the fixing claw 202a of the second extension device 200a, the left side of the first extension device 200 is lowered, and the engagement pin 206a of the second extension device 200a and the second When the engagement hole 210 of the first extension device 200 is aligned, the first extension device 2
00 connector 209 and the connector 205a of the second extension device 200a. Then, the second extension device 2
By pressing the release lever 204a of the second extension device 200a in the direction of arrow B to close the movable claw 203a of the second extension device 200a.
a is locked in the locking hole 208 of the first extension device 200, and the combination of the first extension device 200 and the second extension device 200a is completed as shown in FIG.

FIG. 9 is a side view showing a state in which the personal computer main body 100, the first extension device 200, and the second extension device 200a are combined. The first extension device 200 and the second extension device 200a can be combined.

FIG. 10 is a block diagram showing an internal configuration in a state where the personal computer main body 100, the first extension device 200, and the second extension device 200a are combined.

In FIG. 10, the personal computer body 100 is
PC (personal computer) circuit 1001, personal computer DC / DC circuit 1002, extended ROM (read only memory) DC / DC circuit 1003, microcomputer (microcontroller) DC / DC circuit 1004,
It comprises a power control circuit 1005, a microcontroller (microcomputer) 1006, and a power switch 1007.

The first extension device 200 includes a personal computer (personal computer) circuit 2001, a DC / DC
Circuit 2002, FET (field-effect t)
ransistor: field-effect transistor) 200
3. ROM (Read Only Memory) 2004, ROM
Power supply switch 2005, coalescence detection switch 200
Consists of six.

The second extension device 200a includes a personal computer (personal computer) circuit 2001a, a DC /
DC circuit 2002a, FET (field-effect)
ttransistor: field effect transistor) 20
03a, ROM (read only memory) 2004a,
It comprises a ROM power supply switch 2005a and a coalescence detection switch 2006a.

Further, an AC adapter 30 is used as a power supply source.
0, and the AC adapter 300 has a ROM therein.
300a.

In FIG. 10, the flow of the power supply line is indicated by a to i, and the flow of other signals (address, data, etc.) is indicated by m to x.

FIG. 11 is a flowchart showing the operation procedure of the personal computer according to the present embodiment.
00 shows a control flow of the microcomputer 1006.

In FIG. 11, first, the personal computer 10
0, the AC adapter 300 as a power supply source is connected (step S1101). The AC adapter 300 can be connected only to the personal computer 100. The personal computer 100 to which the AC adapter 300 is connected receives power supply through the line a, and the power supply voltage is controlled by the power supply control circuit 1.
005, the power supply control circuit 1005
/ DC circuit 1004 is supplied with power through line d. The microcomputer DC / DC circuit 1004 converts the received power supply voltage into a voltage value corresponding to the power supply voltage of the microcomputer 1006 and supplies power to the microcomputer 1006 through the line e (step S1102).

The microcomputer 1006 to which power is supplied is connected to the ROM 30 in the AC adapter 300 through the line m.
The information in a is read (read), and the suppliable power value of the AC adapter 300 is obtained through the line n (step S1103). Next, it is determined whether or not the power switch 1007 is on (step S1104).
The power switch 1007 is a switch that is turned on when the user of the bass computer turns on the power. When the power switch 1007 is turned on, the line o is grounded, and its value is stored in a register in the microcomputer 1006. . If the power switch 1007 is turned on, the microcomputer 1006 sends the power supply control circuit 1005 to the personal computer DC / DC circuit 10 through the line u.
02 (Step S110).
5) The power supply control circuit 1005 supplies power to the personal computer DC / DC circuit 1002 through the line b.

The personal computer DC / DC circuit 1002 to which the power has been supplied converts the voltage to an appropriate voltage for the bass computer and supplies the power to the personal computer circuit 1001 through the line c. It is determined whether or not there is (step S1106). The microcomputer 1006 includes first and second extension devices 200 and 200a.
Is connected to the personal computer main body 100, the signal line p sent out, and the unity detection switch 200
In the case where at least one of the devices 6, 2006a is connected to the ground which is turned on, step S1107 is performed.
The connection detection switch 2006 and the ROM power supply switch 2005 are connected by closing the separation lever 204. Similarly, the connection detection switch 2006a and the RO
The power supply switch for M 2005a is a separation lever 204a.
Connected by closing.

If the union detection switches 2006 and 200
If neither of 6a is grounded, the microcomputer 1006 continues to determine whether or not there is a detection signal of the extension device.

If the state of the power switch 1007 is off in step S1104, it is determined in step S1114 whether or not there is a detection signal of the extension device as in step S1106. Microcomputer 1006
Sees a signal line p that is transmitted when the first and second extension devices 200 and 200a are united (connected) to the personal computer body 100, and detects the united detection switches 2006 and 2006.
If at least one of a is connected to the ground that is turned on, the process proceeds to step S1107,
If neither of the signal lines of the combination detection switches 2006 and 2006a is grounded, the process returns to step S1104.

At the time of step S1107, since at least one of the separation levers 204, 204a is closed, the ROM power supply switches 2005, 200
At least one of 5a is closed. However, the microcomputer 1006 does not know at this time which extension device is connected. The microcomputer 1006 sends a control signal to the power supply control circuit 1005 via the line u to drive the extension ROM DC / DC circuit 1003, and the power supply control circuit 1005 supplies power to the extension ROM DC / DC circuit 1003 via the line f. Supply.

Powered DC / DC for extended ROM
The circuit 1003 converts the input voltage of the ROM 2004 or 2004a into an appropriate voltage value and supplies power to the ROM of the ON switch of the ROM power supply switches 2005 and 2005a via the line g (step S1107). ).

Next, the microcomputer 1006 stores the ROM 200 of each of the first and second extension devices 200 and 200a.
4, 2004a is read (step S1108).
Here, if the power supply switch for the ROM is not turned on, the power is not supplied to the ROM, so that the read value is undefined. An identifier (ID) such as an identification number of the extension device is read from the energized ROM, and the microcomputer 1006 stores a power value corresponding to the ID in a memory inside the microcomputer 1006. You can see how much power your expansion device has.

Here, it is assumed that each of the ROMs of the extension device is assigned an address in advance. Also, the microcomputer 1006 stores the personal computer main body 10 in a memory inside itself.
It is assumed that a power consumption value of 0 is also stored.

Thereafter, the microcomputer 1006 determines the power supply capacity (supplied power) of the AC adapter 300 and the PC main body 10.
Sum of electric energy of expansion devices connected to 0 (demand power)
(Step S1109), and it is determined whether the supplied power is larger than the demanded power (step S111).
0). Then, if the supplied power is larger than the demanded power, it is determined whether or not the power switch 1007 is in an on state (step S1111). If the power switch 1007 is not on, the determination processing of step S1111 is repeatedly executed.

If the power switch 1007 is in the ON state, the personal computer DC / DC /
It is determined whether the DC circuit 1002 is being driven (step S1112). And the personal computer 100
When the personal computer DC / DC circuit 1002 is driven, each of the FETs 2003 and 2003a is turned on through the lines q and r to supply power to the extension device, and the power supplied to the line h is changed to DC / DC. The power is supplied to the DC circuits 2002 and 2002a through the lines i and k (step S1113).

Powered DC / DC circuit 200
2, 2002a is a personal computer circuit 2001,
The voltage is converted to an appropriate voltage for 2001a and power is supplied through lines j and l. Powered expansion device 200,
The personal computer circuits 2001 and 2001a in the personal computer 200 are connected to the personal computer circuit 100 of the personal computer 100 through a line w.
1 and data is exchanged, and then the present processing operation is terminated.

On the other hand, in step S1112, the personal computer DC / DC circuit 1002
If the microcomputer 1006 is not driven, the microcomputer 1006 supplies the DC / DC circuit 100 for the personal computer via the power supply control circuit 1005.
2 is driven (step S1117), and then the process proceeds to step S1113 to supply power to the DC / DC circuit of the extension device.

If the supply power is smaller than the demand power in step S1110, the power switch 1
007 is turned on (step S111).
5). If the power switch 1007 is not on, the determination process of step S1115 is repeatedly executed.

If the power switch 1007 is in the ON state, it is determined whether or not the personal computer DC / DC circuit 1002 of the personal computer 100 is being driven, as in step S1112 (step S1116).
Then, when the personal computer DC / DC circuit 1002 of the personal computer body 100 is being driven, power is supplied only to the extendable equipment that can be supplied (step S1118), and then the present processing operation ends. The power switch 10
If 07 is not in the ON state, the process proceeds to step S1117, and the microcomputer 1006 drives the personal computer DC / DC circuit 1002 via the power supply control circuit 1005.

Here, it is assumed that the method of determining the priority order for determining which extension device is to be connected and to which extension device the power supply is to be cut off is determined by the user of the personal computer.

Hereinafter, a method of determining the priority order will be described with reference to FIG.

FIG. 12 is a block diagram showing the configuration of a general personal computer. In FIG. 12, reference numeral 1201 denotes BIOS (basic) which is software for performing original input / output of the personal computer.
Input output systems (this input / output system): a microcontroller (microcomputer) 1202 is the same as the microcontroller (microcomputer) 1006 inside the personal computer 100 shown in FIG. 1203 is a CPU (central processing unit), 1
204 is an internal memory, and 1205 is a display device 12 described later.
Video controller 1206 controls the CRT
(Cathode ray tube) or display device such as liquid crystal display, etc.
Is a floppy disk controller for controlling an FDD 1208 described later, 1208 is a floppy disk drive (FDD), 1209 is a hard disk controller for controlling an HDD 1210 described later, and 1210 is an HDD
(Hard disk drive), 1211 is a keyboard controller for controlling a keyboard 1212 described later, 1
212 is a keyboard, 1213 is a VRAM (video random access memory), and 1214 is an internal bus.

The user starts up the personal computer by itself and sets the priority order of the extension devices on the setup screen. The set priority information is stored in a backup memory in the BIOS 1201. BIOS12
01 sends this priority information to the microcomputer 122 via the internal bus 1214, and the microcomputer 122 uses the priority information to reduce the power of the AC adapter 300 (see FIG. 10) to the personal computer body 100 and the personal computer body 100. (Figure 1
0), which power is less than the sum of the power of the extension devices connected to the BIOS 120, which extension device is to be connected and which extension device is to be disconnected is determined.
Send to 1.

The BIOS 1201 sends the decision content information sent in this way to the VRAM 1213, and the video controller 1205 sends the contents of the VRAM 1213 to the display device 1206, so that the user can electrically connect / disconnect the extension device. Notify.

Here, in FIG. 10, if the first extension device 200 is electrically disconnected and the second extension device 200a is connected, the first extension device 200
FET 2003 is turned off, but the lines g, h, p,
Since w is connected between the personal computer 100 and the second extension device 200a, there is no problem.

In the above-described embodiment, a notebook personal computer is exemplified as a specific example of the electronic apparatus. However, the present invention is not limited to this.
It may be a desktop personal computer or a simple computer.

Further, the number of connected expansion devices is not limited to the above-described embodiment, but may be increased or decreased as needed.

Further, it goes without saying that other configurations can be appropriately changed without departing from the gist of the present invention.

[0071]

As described above in detail, according to the electronic device of the present invention, there is an effect that the electronic device main body and the extension device can be used within the amount of power that can be supplied by the AC adapter without shutting down. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an electronic device according to a first embodiment of the present invention.

FIG. 2 is a perspective view for explaining a method of combining an electronic device main body and an extension device in the electronic device according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating a configuration of a back surface of the electronic device main body and a back surface of the extension device in the electronic device according to the first embodiment of the present invention.

FIG. 4 is a partially cutaway side view for explaining a method of combining the electronic device main body and the extension device in the electronic device according to the first embodiment of the present invention.

FIG. 5 is a partially cutaway side view for explaining a method of combining the electronic device main body and the extension device in the electronic device according to the first embodiment of the present invention.

FIG. 6 is a perspective view for explaining a method of combining the first extension device and the second extension device in the electronic device according to the first embodiment of the present invention.

FIG. 7 is a partially cutaway side view for explaining a method of combining the first extension device and the second extension device in the electronic device according to the first embodiment of the present invention.

FIG. 8 is a partially cut-away side view for explaining a method of combining the first extension device and the second extension device in the electronic device according to the first embodiment of the present invention.

FIG. 9 is a block diagram showing an internal configuration of the electronic device according to the first embodiment of the present invention in a state where the electronic device main body, the first extended device, and the second extended device are combined.

FIG. 10 is a side view for explaining a method of combining the electronic device main body, the first extension device, and the second extension device in the electronic device according to the first embodiment of the present invention.

FIG. 11 is a flowchart illustrating control of a microcomputer inside the electronic device main body in the electronic device according to the first embodiment of the present invention.

FIG. 12 is a block diagram showing an internal configuration of a general personal computer.

[Explanation of symbols]

REFERENCE SIGNS LIST 100 electronic device main body 101 display device 102 keyboard (input device) 103 hard disk drive 104 floppy disk drive 105 locking hole 106 locking hole 107 connector 108 engaging hole 200 first extended device 200a second extended device 201 CD-ROM Dry drive 202 Fixed claw 202a Fixed claw 203 Movable claw 203a Movable claw 204 Release lever (open / close lever) 204a Release lever (open / close lever) 205 Connector 205a Connector 206 Engagement pin 206a Engagement pin 207 Locking hole 207a Locking hole 208 Locking Hole 208a Locking hole 209 Connector 209a Connector 210 Engagement hole 210a Engagement hole 300 AC adapter 300a ROM (read only memory) 1001 PC circuit 1002 DC / DC circuit 1003 DC / DC circuit for extension ROM 1004 DC / DC circuit for microcomputer 1005 Power control circuit 1006 Microcontroller (microcomputer) 1007 Power switch 2001 PC circuit 2001a PC circuit 2002 DC / DC circuit 2002a DC / DC circuit 2003 FET (electric field) Effect transistor) 2003a FET (field effect transistor) 2004 ROM (read only memory) 2004a ROM (read only memory) 2005 ROM supply power switch 2005a ROM supply power switch 2006 coalescence detection switch 2006a coalescence detection switch 1201 BIOS (basic input / output) System) 1202 microcontroller (microcomputer) 1203 CPU (central processing unit) 1204 Li 1205 video controller 1206 display 1207 floppy disk controller 1208 FDD (floppy disk drive) 1209 hard disk controller 1210 HDD (hard disk drive) 1211 keyboard controller 1212 keyboard 1213 VRAM (video random access memory) 1214 Internal bus

Claims (21)

[Claims] 1. An electronic device comprising: an electronic device main body; and a plurality of extension devices detachably connected to the electronic device main body, wherein the electronic device main body includes power control means for controlling power supply. Electronic equipment characterized. 2. An apparatus according to claim 1, further comprising a reading means for reading stored information in said storage means, wherein an AC adapter having a built-in storage means for storing a power value which can be supplied by itself is used as a power supply source. Electronic equipment according to 1. 3. The electronic apparatus according to claim 1, wherein said storage means is a ROM (Read Only Memory). 4. An identifier is assigned to each of the plurality of extension devices. Each extension device has in its own storage means for storing the identifier, and reading means for reading information stored in the storage means. The electronic device according to claim 1, further comprising: 5. The electronic device according to claim 4, wherein the identifier is an identification number. 6. The electronic apparatus according to claim 4, wherein said storage means is a ROM (Read Only Memory). 7. The power supply control means determines the amount of power supply from the currently connected AC adapter using the reading means in the electronic device according to claim 2, after the AC adapter as a power supply source is connected. The electronic device according to claim 1, wherein the electronic device is read. 8. When an extension device is connected when an AC adapter as a power supply source is connected and operable, the power supply control unit supplies power to a storage unit inside each extension device, and 4. The electronic device according to claim 1, wherein an identifier stored in a storage unit inside each of the extension devices is read using a reading unit in the electronic device according to claim 3. 9. The electronic device main body according to claim 2, wherein when one or more extension devices are connected to the electronic device main body and then an AC adapter is connected as a power supply source, the electronic device main body power supply control means. 4. The electronic device according to claim 3, wherein the power supply amount from the currently connected AC adapter is read using a reading unit in the device, and is stored in a storage unit inside each of the extension devices using the reading unit in the electronic device according to claim 3. 2. The electronic device according to claim 1, wherein the identifier is read. 10. A connector for electrically connecting the electronic device main body and the extension device, an engagement means for mechanically connecting the electronic device main body and the extension device, and an operating body for operating the engagement device. 2. The electronic apparatus according to claim 1, further comprising: detecting means for detecting that the engaging means is closed by the operating body and transmitting a detection signal to the power control means. 11. The electronic device according to claim 10, wherein the operation body is a lever. 12. A connector for electrically connecting an extension device to another extension device, an engagement means for mechanically connecting the extension device to another extension device, and an operating body for operating the engagement means. 2. The electronic apparatus according to claim 1, further comprising: a detection unit configured to detect that the engagement unit is closed by the operation body and to transmit a detection signal to the power control unit. 13. The electronic device according to claim 12, wherein the operation body is a lever. 14. A judging means for judging whether or not to supply power to the extension device when the power control means receives a detection signal from the detection means, and the judging device supplies power to the extension device. 13. The electronic device according to claim 10, further comprising a control unit configured to start power supply to the extension device when it is determined that the power is to be supplied. 15. The electronic device according to claim 1, wherein a plurality of AC adapters having different powers can be connected to the electronic device main body. 16. When an AC adapter other than the AC adapter in the electronic device according to claim 2 is connected,
2. The electronic device according to claim 1, wherein the power control unit controls so as not to supply power to the electronic device main body and the extension device. 17. An extension device which is separated from the electronic device main body when the power supply capacity from the AC adapter is smaller than the power consumption of the electronic device main body and all the extension devices connected to the electronic device main body. 2. The electronic device according to claim 1, further comprising a setting unit that sets the order when a user of the electronic device turns on a power supply of the electronic device body alone.
Electronic device as described. 18. The electronic device according to claim 1, wherein the electronic device is a computer. 19. The electronic device according to claim 1, wherein the electronic device is a personal computer.
Electronic device as described. 20. The electronic device according to claim 1, wherein the electronic device is a notebook personal computer. 21. The electronic device according to claim 1, wherein the electronic device is a desktop personal computer.