JP2005354851A - Power supply device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply device for supplying power in safety by judging correctly which one of a plurality of removable power supplies is attached, and to provide an electronic apparatus. <P>SOLUTION: In an image recorder 1, a power supply section 10 discharges remaining charges at soft start function sections Fsa, Fsb and Fsc of a power supply line from a plurality of attachable power supplies 20a-20n to a selecting section 13 for selecting one of the plurality of power supplies 20a-20n as a working power supply 20a-20n and provided with a soft start function or a power supply line subsequent to the selecting section 13, and discharges remaining charges of a power supply line not connected with the power supply 20a-20n or all power supply lines at discharge circuits 11a-11n for a predetermined time or up to a predetermined voltage, judges the attached power supply 20a-20n at a judging circuit 12, and selects the power supply 20a-20n judged at the judging circuit 12 as the working power supply at the selecting section 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power supply device and an electronic device, and more particularly, to a power supply device and an electronic device that accurately determine which of a plurality of detachable power supplies is mounted and supply power safely.

  In recent years, in electronic devices such as digital still cameras, it has become possible to selectively use a plurality of power sources such as a power source obtained by converting a plurality of various batteries and an AC power source into a DC with an adapter.

  In an electronic device that can use such a plurality of power sources, for example, an AA alkaline manganese battery as a primary battery and a rechargeable Ni-Cd battery (nickel cadmium battery) or a secondary battery such as a lithium battery are used. In electronic devices that can use multiple power sources in this way, the performance of the power source to be used should be used appropriately, and accidents such as smoke, fire, or explosion may occur. In order to prevent this, it is necessary to determine the type of power source to be used.

  Therefore, conventionally, in an electronic device capable of selectively using a plurality of types of batteries, battery discrimination means for discriminating the type of battery to be used, and switching the battery supply current according to the discrimination result of the battery discrimination means An electronic device having current switching means has been proposed (see Patent Document 1).

  Conventionally, when one of the batteries having substantially the same outer shape but different electrical characteristics is selected and loaded into the battery storage chamber, it is determined which battery is the loaded battery, A camera that displays the loading status has been proposed (see Patent Document 2).

  The applicant previously provided a power storage unit and a DC power input terminal, and in the power storage unit, either a battery power source incorporating a battery or an AC adapter for converting commercial AC into a predetermined DC voltage is provided. There has been proposed an electronic device that can be detachably attached and can be detachably attached, and the DC power input terminal cannot be used when the AC adapter is used, so that the DC power from the DC power input terminal is not applied to the main circuit (see Patent Document 3). ).

  In other words, this conventional technology allows the battery to be charged even when operating with a battery power source, and makes a power supply unit that does not take up space even when operated with a commercial power source, and an abnormal current is applied from the DC power input terminal when the AC adapter is used. This prevents malfunctions and circuit destruction.

JP-A-9-236143 JP 2000-19595 A Japanese Patent Laid-Open No. 7-59335

  However, in the above prior art, the power source used among a plurality of power sources is discriminated, but the target when the discrimination of the power source used is not taken into consideration, and the device In order to prevent the occurrence of abnormalities such as smoke, fire, and explosion, there was a need for improvement.

  Accordingly, the present invention provides a power supply apparatus that performs power supply determination quickly and accurately, and that is safe even if the power supply determination is incorrect, and an electronic device including the power supply apparatus.

  Specifically, the invention according to claim 1 selects a power supply including a soft start function unit that selects one of the plurality of power supplies as a use power supply from a plurality of mountable power supplies and uses charge accumulation. Among the power supply lines up to the means and / or the power supply lines after the power supply selection means, the discharge means discharges the remaining charges of the power supply lines not connected to the power supply or all the power supply lines to a predetermined time or a predetermined voltage, The residual charge of the software function part of the power source selection unit is discharged, the power source discriminating unit discriminates the mounting power source, and the power source selecting unit selects the power source discriminated by the power source discriminating unit as the power source to be used. Determine the power supply quickly and accurately. Even if the determination is wrong, select a power supply that does not have a power supply selection means, power is not supplied, and no operation is performed. Only, and its object is to provide a power supply device which can improve safety.

  According to a second aspect of the present invention, there is provided a power supply line from a plurality of power sources that can be mounted to one of the plurality of power sources as a power source to be used and to a power source selection unit having a soft start function unit that utilizes charge accumulation Or / and the remaining charge of the power supply line after the power supply selection means is detected by the remaining charge detection means after discharging the remaining charge of the soft start function section of the power supply selection means or while discharging, and the power supply determination means However, the mounted power source is determined by referring to the remaining charge detected by the remaining charge detecting unit, and the power source selecting unit selects the power source determined by the power source determining unit as the power source to be used. Even if the determination is wrong, it is possible to select a power supply that is not equipped with a power supply selection means, supply no power, and perform no operation. And its object is to provide a power supply device capable of improving the resistance.

  According to a third aspect of the present invention, there is provided a power supply line extending from a plurality of mountable power supplies to a power supply selection means that selects one of the plurality of power supplies as a use power supply and has a soft start function using charge accumulation. / And among the power supply lines after the power supply selection means, the discharge means discharges the remaining charges of the power supply line to which the power supply is not connected or all the power supply lines to a predetermined time or a predetermined voltage, and the software function of the power supply selection means The residual charge of the power supply line is discharged by the residual charge detection means to detect the residual charge of the power supply line from the power source to the power supply selection means or the power supply line after the power supply selection means. The installed power source is determined by referring to the detected remaining charge, and the power source selecting unit selects the power source determined by the power source determining unit as the power source to be used. The source can be determined quickly and more accurately. Even if the determination is incorrect, a power source that does not have a power selection means is selected, no power is supplied, and no operation is performed. An object of the present invention is to provide a power supply device that can improve performance.

  According to a fourth aspect of the present invention, before the mounted power source is determined by the power source determining unit, the remaining charge accumulated in the power source selecting unit having the soft start function is discharged or after being discharged, By starting the discharge of the residual charge due to and / or the detection of the residual charge by the residual charge detection means, unnecessary power consumption of the connected power source is prevented, power saving is achieved, and at least power source discrimination is performed. It is an object of the present invention to provide a power supply apparatus that performs accurate power supply determination by eliminating residual charges before or reducing the charge to a predetermined voltage.

  According to the fifth aspect of the present invention, the discharge of the residual charge by the discharge means and the residual charge by the residual charge detection means are discharged while discharging the charge accumulated in the power source selection means having the soft start function or after the discharge. By performing the detection in parallel or based on a predetermined priority order, for example, the residual charge is detected first, and the residual charge has disappeared or has been reduced to a predetermined voltage. Therefore, it is not necessary to perform the discharge operation, and the power source can be determined more efficiently. When the discharge operation and the detection operation are performed at the same time, the remaining charge is discharged and detected in the shortest time. An object of the present invention is to provide a power supply device that can promptly accurately determine a mounted power supply.

  According to the sixth aspect of the present invention, when the remaining charge detected by the remaining charge detecting means is reduced to a predetermined set value, but the power supply detecting means is not in a power detectable state, the power selecting means having a soft start function is provided. By stopping the discharge of accumulated charges, the discharge process by the discharge means and / or the detection process by the remaining charge detection means, and causing the power supply selection means to select at least one power supply, the power supply device is reliably energized. An object of the present invention is to provide a power supply device that can operate and has good usability.

  According to the seventh aspect of the present invention, when the power source discriminating means is not in a power detection detectable state within a predetermined setting condition set in advance, the electric charge stored in the power source selecting means having the soft start function is discharged and discharged. An object of the present invention is to provide a safer power supply apparatus that avoids danger by stopping discharge processing by means and / or detection processing by residual charge detection means and executing predetermined error processing.

  According to the eighth aspect of the present invention, a power supply line from a plurality of mountable power supplies to a power supply selection means for selecting one of the plurality of power supplies as a use power supply, and / or a power supply line among power supply lines after the power supply selection means. The discharge means discharges the remaining charges of the power supply line not connected to the power supply line or all the power supply lines to a predetermined time or a predetermined voltage, and discharges the remaining charges of the soft function part of the power supply selection means, The power supply selecting means determines the mounted power supply quickly and accurately by providing a power supply device that determines the mounted power supply, and the power supply selecting means selects the power supply determined by the power supply determining means as the used power supply. Even if it is mistaken, an electronic device that can improve safety by selecting a power source that is not equipped with a power source selection means, not being supplied with power, and not operating. It is intended to be.

  According to the ninth aspect of the present invention, the remaining charge on the power supply line from the plurality of mountable power supplies to the power supply selection means for selecting one of the plurality of power supplies as the use power supply and / or the power supply line after the power supply selection means is obtained. After the residual charge of the soft start function unit of the power source selection unit is discharged or discharged, the residual charge detection unit detects the residual charge, and the power source determination unit refers to the residual charge detected by the residual charge detection unit. Thus, the power supply selecting means can determine the mounted power supply more inexpensively and quickly and accurately by providing a power supply device for the power supply selecting means to select the power supply determined by the power supply determining means as the use power supply. Even if the determination is wrong, an electronic device that can improve safety by selecting a power source that is not equipped with a power source selection means, not being supplied with power, and not operating. It is intended to be.

  According to a tenth aspect of the present invention, a power supply line from a plurality of mountable power supplies to a power supply selection means for selecting one of the plurality of power supplies as a use power supply and / or a power supply line among power supply lines after the power supply selection means. The remaining charge of the power supply line not connected to the power supply line or all of the power supply lines is discharged by the discharge means for a predetermined time or to a predetermined voltage, and the remaining charge of the soft function part of the power supply selection means is discharged, thereby remaining charge detection means The power source line from the power source to the power source selection unit or the power source line after the power source selection unit detects the remaining charge, and the power source discrimination unit discriminates the mounted power source with reference to the residual charge detected by the residual charge detection unit. Thus, the power source selecting means provides a power supply device that selects the power source determined by the power source determining means as the power source to be used, so that the mounted power source can be determined quickly and more accurately. Even if the determination is wrong, an electronic device that can improve safety by selecting a power source that is not equipped with a power source selection means, not being supplied with power, and not operating. The purpose is to do.

  The power supply apparatus according to claim 1 is a power supply apparatus that can be used by switching a plurality of power supplies, and uses power supply discriminating means for detecting a mounted power supply among the plurality of power supplies, and charge accumulation. A power start selecting unit that includes a soft start function unit that performs soft start, and that selects one of the plurality of power sources as a power source to be used; a power line from the power source to the power source selecting unit; Discharging means for discharging the remaining charge of the power supply line; and causing the power supply selection means to discharge the remaining charge of the soft start function unit, and the power supply line to which the power supply is not connected to the discharging means or all the power supply lines. The remaining electric charge is discharged for a predetermined time or a predetermined voltage so that the power supply discriminating unit discriminates the mounted power source, and the power source discriminated by the power source discriminating unit is determined. By the use power and a, and a control means for selectively to said power supply selection means it has achieved the above objects.

  A power supply device according to a second aspect of the present invention is a power supply device that can be used by switching a plurality of power supplies, and uses power supply discriminating means for detecting a mounted power supply among the plurality of power supplies, and charge accumulation. A power start selecting unit that includes a soft start function unit that performs soft start, and that selects one of the plurality of power sources as a power source to be used; a power line from the power source to the power source selecting unit; Residual charge detection means for detecting the residual charge of the power supply line, and the residual charge detection means after discharging the residual charge of the soft start function unit to the power supply selection means or while discharging the residual charge The remaining charge is detected, and the power supply determining unit is referred to the remaining charge detected by the remaining charge detecting unit to determine the mounted power source. And control means for selectively to said power selection means a source as the power supply used, due to the provision of the, have achieved the above objects.

  A power supply device according to a third aspect of the invention is a power supply device that can be used by switching a plurality of power supplies, and uses a power discriminating means for detecting a mounted power supply among the plurality of power supplies, and charge accumulation. A power start selecting unit that includes a soft start function unit that performs soft start, and that selects one of the plurality of power sources as a power source to be used; a power line from the power source to the power source selecting unit; A residual charge detecting means for detecting a residual charge in a power supply line; a power supply line from the power supply to the power supply selecting means; and / or a discharging means for discharging a residual charge in a power supply line after the power supply selecting means; and the power supply selecting means To discharge the residual charge of the soft start function unit and before the power supply line or all power supply lines to which the power supply is not connected to the discharge means. The residual charge is discharged for a predetermined time or a predetermined voltage, the residual charge detection unit is caused to detect the residual charge, and the power source determination unit is referred to the residual charge detected by the residual charge detection unit. The above-described object is achieved by including a control unit that discriminates the mounted power source and causes the power source selection unit to select the power source discriminated by the power source discriminating unit as the power source to be used.

  In each of the above cases, for example, as described in claim 4, the control unit discharges the remaining charge of the soft start function unit to the power source selection unit before the mounted power source is determined by the power source determination unit. Alternatively, the discharge of the residual charge by the discharge unit and / or the detection of the residual charge by the residual charge detection unit may be started while discharging the residual charge.

  Further, for example, as described in claim 5, the control unit discharges the residual charge of the soft start function unit from the power source selection unit or while discharging the residual charge. The discharge of the residual charge according to the above and the detection of the residual charge by the residual charge detection means may be executed in parallel or based on a predetermined priority.

  Further, for example, as described in claim 6, the control unit has the remaining charge detected by the remaining charge detection unit lowered to a predetermined set value, but is not in a power supply detectable state by the power supply determination unit. Sometimes, the power source selection means stops the residual charge discharge process of the soft start function unit, the discharge process by the discharge means or / and the detection process by the residual charge detection means, and at least one power source is connected to the power source selection means. It may be selected.

  Further, for example, as described in claim 7, the control unit performs the soft start by the power source selection unit when the power source determination unit does not enter a power detection detectable state within a predetermined setting condition. A predetermined error process may be performed by stopping the discharge process of the residual charge of the functional unit, the discharge process by the discharge unit, and / or the detection process by the residual charge detection unit.

  An electronic device according to an eighth aspect of the invention is an electronic device including a power supply device that can be used by switching a plurality of power supplies, and the power supply device detects a power supply that is mounted among the plurality of power supplies. A power source determining unit; a power source selecting unit that includes a soft start function unit that performs soft start using charge accumulation; and selecting one of the plurality of power sources as a power source to be used; and a power source from the power source to the power source selecting unit Discharge means for discharging the remaining charge of the power line after the line or / and the power supply selection means, and causing the power supply selection means to discharge the remaining charge of the soft start function unit, and the power supply is connected to the discharge means. Causing the power source discriminating means to discriminate the mounted power source by letting the remaining charge of the power source line or all the power source lines be discharged to a predetermined time or voltage. And control means for selectively to said power selection means discriminated power of the power supply determining means as used power, due to the provision of the, have achieved the above objects.

  The electronic device according to claim 9 is an electronic device including a power supply device that can be used by switching a plurality of power supplies, and the power supply device detects a power supply mounted among the plurality of power supplies. A power source determining unit; a power source selecting unit that includes a soft start function unit that performs soft start using charge accumulation; and selecting one of the plurality of power sources as a power source to be used; and a power source from the power source to the power source selecting unit A residual charge detection means for detecting a residual charge of a power line after the line or / and the power supply selection means, and after discharging the residual charge of the soft start function unit to the power supply selection means or discharging the residual charge The remaining charge detection unit detects the remaining charge, and the power source determination unit refers to the remaining charge detected by the remaining charge detection unit to determine the mounted power source. So, a control means for selecting the power supply is determined in the power determining means as used power to the power source selection unit, due to the provision of the, have achieved the above objects.

  The electronic device according to claim 10 is an electronic device including a power supply device that can be used by switching a plurality of power supplies, and the power supply device detects a power supply mounted among the plurality of power supplies. A power source determining unit; a power source selecting unit that includes a soft start function unit that performs soft start using charge accumulation; and selecting one of the plurality of power sources as a power source to be used; and a power source from the power source to the power source selecting unit A remaining charge detection means for detecting a remaining charge on a power line after the power line selection means and / or a power supply line from the power supply to the power supply selection means and / or a residual charge on the power supply line after the power supply selection means. Discharging means for discharging, and causing the power source selection means to discharge the residual charge of the soft start function unit, and the power source not connected to the discharging means. Discharge of the remaining charge of a line or all power lines to a predetermined time or a predetermined voltage, cause the remaining charge detection means to detect the remaining charge, and allow the power supply determination means to detect the remaining charge detection means Control means for determining the mounted power source by referring to the remaining charge, and causing the power source selection unit to select the power source determined by the power source determination unit as the power source to be used. Yes.

  According to the power supply device of the first aspect of the present invention, the power supply selection means having a soft start function that selects one of the plurality of power supplies as a use power supply from a plurality of mountable power supplies and uses charge accumulation. Among the power supply lines up to and / or from the power supply selection means, the remaining charges of the power supply lines not connected to the power supply or all the power supply lines are discharged by the discharge means to a predetermined time or a predetermined voltage, and the power supply The remaining charge of the software function part of the selection means is discharged, the power supply determination means determines the mounted power supply, and the power supply selection means selects the power supply determined by the power supply determination means as the use power supply. It is possible to quickly and accurately discriminate. Even if the discriminating is wrong, select a power source that is not equipped with the power source selection means, power is not supplied, and the operation Only not cracks, thereby improving the safety.

  According to the power supply device of the second aspect of the present invention, the power supply selection means having a soft start function that selects one of the plurality of power supplies as a use power supply from a plurality of mountable power supplies and uses charge accumulation. The remaining charge of the power supply line up to and / or the power supply line after the power supply selection means is detected by the residual charge detection means after discharging the residual charge of the soft start function part of the power supply selection means or while discharging it. The power source discriminating unit discriminates the mounted power source with reference to the residual charge detected by the residual charge detecting unit, and the power source selecting unit selects the power source discriminated by the power source discriminating unit as the used power source. Can be discriminated more quickly and accurately, even if the discrimination is wrong, a power source that is not equipped with a power source selection means is selected and no power is supplied. Only not cracks, thereby improving the safety.

  According to the power supply device of the third aspect of the present invention, the power supply selection means having a soft start function that selects one of the plurality of power supplies as a use power supply from a plurality of mountable power supplies and uses charge accumulation. Among the power supply lines up to and / or from the power supply selection means, the remaining charges of the power supply lines not connected to the power supply or all the power supply lines are discharged by the discharge means to a predetermined time or a predetermined voltage, and the power supply The remaining charge of the soft function part of the selection means is discharged, the remaining charge detection means detects the remaining charge of the power supply line from the power supply to the power supply selection means or the power supply line after the power supply selection means, and the power supply determination means The mounted power source is determined with reference to the residual charge detected by the residual charge detection unit, and the power source selection unit selects the power source determined by the power source determination unit as the power source to be used. Therefore, it is possible to quickly and more accurately determine the installed power supply. Even if the determination is incorrect, a power supply that does not have a power supply selection means is selected and power is not supplied, and operation is performed. It is possible to improve safety only by not breaking.

  According to the power supply device of the invention described in claim 4, the electric charge accumulated in the power supply selection means having the soft start function is discharged or discharged before the mounted power supply is determined by the power supply determination means. Thereafter, discharge of the residual charge by the discharge means and / or detection of the residual charge by the residual charge detection means is started, so that unnecessary power consumption of the connected power source can be prevented and power saving can be achieved. At least before the power source discrimination is performed, the residual charge can be eliminated, or the voltage can be lowered to a predetermined voltage, so that accurate power source discrimination can be performed.

  According to the power supply device of the fifth aspect of the present invention, the discharge of the residual charge and the detection of the residual charge by the discharge means are performed while discharging the charge accumulated in the power supply selection means having the soft start function or after the discharge. Since the detection of the residual charge by the means is executed in parallel or based on a predetermined priority, for example, the residual charge is detected first and the residual charge is lost or the predetermined voltage is set. If it is lowered, it is not necessary to perform the discharge operation, and it is possible to more efficiently determine the power source, and when the discharge operation and the detection operation are performed simultaneously, the remaining charge is discharged and detected in the shortest time. Thus, the mounted power source can be accurately determined more quickly.

  According to the power supply device of the sixth aspect of the present invention, the remaining charge detected by the remaining charge detecting means is lowered to a predetermined set value. Since the discharge of the electric charge accumulated in the power source selection means, the discharge process by the discharge means or / and the detection process by the residual charge detection means are stopped and the power source selection means selects at least one power source, It is possible to reliably perform the operation, to enable the operation, and to improve the usability.

  According to the power supply device of the seventh aspect of the present invention, when the power supply discriminating means does not enter a power detection detectable state within a predetermined setting condition set in advance, it is stored in the power supply selecting means having a soft start function. Since the charge discharge, the discharge process by the discharge means and / or the detection process by the residual charge detection means are stopped and the predetermined error process is executed, the danger can be avoided and the safety can be further improved. .

  According to the electronic device of the eighth aspect of the present invention, the power line from the plurality of power sources that can be mounted to the power source selection unit that selects one of the plurality of power sources as the power source to be used and / or the power source after the power source selection unit Among the lines, the discharge of the remaining charge of the power supply line that is not connected to the power supply or all the power supply lines is performed for a predetermined time or a predetermined voltage by the discharge means, and the remaining charge of the soft function part of the power supply selection means is discharged. The power source discriminating means discriminates the mounted power source, and the power source selecting means provides a power supply device that selects the power source discriminated by the power source discriminating means as the power source to be used, so that the mounted power source can be discriminated quickly and accurately. Even if the determination is wrong, it is possible to select a power source that is not equipped with a power source selection means, and no power is supplied and no operation is performed. It is possible.

  According to the electronic apparatus of the ninth aspect of the present invention, the power line from the plurality of power sources that can be mounted to the power source selection unit that selects one of the plurality of power sources as the power source to be used and / or the power source after the power source selection unit The residual charge of the line is detected by the residual charge detection means after discharging the residual charge of the soft start function unit of the power supply selection means or while discharging, and the power supply determination means detects the residual charge detection means. Since the power supply selection means is provided with a power supply device that determines the mounted power supply with reference to the remaining charge and the power supply selection means selects the power supply determined by the power supply determination means as the use power supply. It is possible to quickly and accurately discriminate, even if the discriminating is wrong, select a power source that is not equipped with power selection means, no power is supplied and no operation is performed, improving safety Let It is possible.

  According to the electronic device of the tenth aspect of the present invention, the power line from the plurality of mountable power supplies to the power selection means for selecting one of the plurality of power supplies as the use power supply and / or the power supply after the power selection means. Among the lines, the discharge of the remaining charge of the power supply line that is not connected to the power supply or all the power supply lines is performed for a predetermined time or a predetermined voltage by the discharge means, and the remaining charge of the soft function part of the power supply selection means is discharged. The residual charge detection means detects the residual charge on the power supply line from the power supply to the power supply selection means or the power supply line after the power supply selection means, and the power supply determination means refers to the residual charge detected by the residual charge detection means. Since the power supply selecting unit is provided and the power source selecting unit selects the power source determined by the power source determining unit as the power source to be used, the mounted power source can be quickly and more easily selected. It is possible to accurately discriminate, even if the discriminating is wrong, select a power source that is not equipped with a power source selection means, no power is supplied, no operation is performed, and safety is improved Can do.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, since the Example described below is a suitable Example of this invention, various technically preferable restrictions are attached | subjected, However, The scope of the present invention limits this invention especially in the following description. As long as there is no description of the effect, it is not restricted to these aspects.

  1 to 7 are diagrams showing an embodiment of a power supply device and an electronic apparatus according to the present invention, and FIG. 1 is a power supply of an image recording apparatus 1 to which the embodiment of the power supply apparatus and the electronic apparatus according to the present invention is applied. FIG. 3 is a block diagram of the main part of the unit 10.

  In FIG. 1, an image recording apparatus 1 is an electronic apparatus that performs image recording such as a digital still camera, a copying apparatus, and a printer apparatus, and includes a power source unit (power source device) 10 and a plurality of power sources 20 a connected to the power source unit 10. 20n and other units 30 such as a display unit and a sound unit to which power is supplied from the power supply unit 10 are provided.

  The power supply section 10 includes a number of discharge circuits (discharge means) 11a to 11n corresponding to the number of power supplies 20a to 20n, a determination circuit (power supply determination means) 12, a selection section (power supply selection means) 13, and a discharge circuit (discharge means). 14, a detection circuit (remaining charge detection means) 15, a control unit (control means) 16, and the like.

  The selection unit 13 includes a number of selection circuits 13a to 13n corresponding to the number of the power sources 20a to 20n. The selection units 13 are connected to the power sources 20a to 20n and connected to the other units 30, respectively. Power is supplied to the other units 30 from 20a to 20n, and a soft start function using charge accumulation is provided as will be described later.

  The determination circuit 12 determines whether or not each of the power supplies 20a to 20n is mounted, and outputs a determination result to the control unit 16, and the control unit 16 selects the selection circuits 13a to 13n and the determination circuit 12 based on the determination result of the determination circuit 12. The discharge circuits 11a to 11n are controlled to perform selection control and discharge control of the power sources 20a to 20n.

  The discharge circuits 11a to 11n are connected between the power sources 20a to 20n and the selection circuits 13a to 13n of the selection unit 13, and are turned on / off under the control of the control unit 16 so that the power sources 20a to 20n. In addition, the remaining charges on the power supply lines of the power supplies 20a to 20n are discharged.

  The discharge circuit 14 is connected between the selection unit 13 and the other unit 30, is turned on / off under the control of the control unit 16, and is a power line between the selection unit 13 and the other unit 30. The remaining charge of is discharged.

  Under the control of the control unit 16, the detection circuit 15 detects the presence or absence of the remaining charge on the power supply line from the selection unit 13 to the other unit 30, and outputs the remaining charge detection result to the control unit 16. Controls the discharge operation of the discharge circuit 14 based on the residual charge detection result of the detection circuit 15.

  The control unit 16 includes, for example, a CPU (Central Processing Unit), a program for controlling operations of the image recording apparatus 1 and the power supply unit 10, a ROM (Read Only Memory) and a RAM (Random Access Memory) for storing necessary data, and the like. And the CPU controls each part of the image recording apparatus 1 using the RAM as a work memory based on a program in the ROM, executes processing as the image recording apparatus 1, and controls each part of the power supply unit 10. Then, a power control process described later is executed.

  Then, as the power source 20a to 20n, for example, when a lithium battery is attached to the power source 20a and an AA battery is attached to the power source 20b, the power source unit 10 is configured as shown in FIG. 20b is connected to UNREG1 to which the other unit 30 as a load is connected via the selection circuits 13a and 13b of the selection unit 13, and the power line of the lithium battery power supply 20a is downstream of the selection circuit 13a. That is, the discharge circuit 14 is connected between the selection circuit 13a and the UNREG1, and the power line of the AA battery 20b is upstream of the selection circuit 13b, that is, the selection circuit 13b and the power supply 20b. A determination / discharge circuit in which the determination circuit 12 and the discharge circuit 11b are integrated is connected between the two.

  Each of the selection circuits 13a and 13b is turned on / off by, for example, small signal amplification transistors Q1a and Q1b (2SC4081 and the like) for amplifying the control signals DCCTL_DIV and DCCTL_T3 from the control unit 16 and the operations of the transistors Q1a and Q1b. A resistor Ra that realizes a soft start function by being connected in parallel to MOSFETs (Field Effect Transistors) Q2a and Q2b and MOSFETs Q2a and Q2b for connecting / cutting off the lithium battery power source 20a and the AA battery power source 20b, respectively. And a soft start function unit Fsa composed of a capacitor Ca, a soft start function unit Fsb composed of a resistor Rb and a capacitor Cb, and the like, according to control signals DCCTL_DIV and DCCTL_T3 from the control unit 16 to the transistors Q1a and Q1b. The MOSFETs Q2a and Q2b are turned on / off to connect / cut off the power supply line. When the transistors Q2a and Q2b are turned on, the soft start function unit Fsa, the resistor Rb, and the capacitor Cb that are configured by the resistor Ra and the capacitor Ca Soft start is performed by the soft start function unit Fsb that is configured.

  The soft start function is that when the selection circuits 13a and 13b are turned on, an inrush current exceeding the power supply capability flows to the load connected to the subsequent UNREG1, and the power supply voltage drops. In order to prevent the power supply unit 10 from becoming inoperable, the current limiting function is applied when the selection circuits 13a and 13b are turned on.

  Then, if charges remain in the capacitors Ca and Cb of the soft start function units Fsa and Fsb that realize this soft start function, even if the control unit 16 outputs an off signal to the selection circuits 13a and 13b, the selection circuit 13a , 13b cannot be turned off, and there is a possibility that an incorrect power supply determination is performed by energization. Therefore, as will be described later, the charges of the soft start function units Fsa and Fsb are discharged.

  In the MOSFETs Q2a and Q2b, the direction of the parasitic diodes is opposite to the UNREG1 direction as the load from the power sources 20a and 20b.

  In addition, the discharge circuit 14 includes a small signal amplification transistor Q3 and the like, and the transistor Q3 is turned on in response to a discharge signal (BAT_DIS, BAT_TEST) from the control unit 16 to discharge the charge on the power supply line after the selection circuit 13a. I do.

  The determination circuit 12 uses, for example, epitaxial planar transistors Q4 and Q5, and starts a determination operation by a test signal BAT_TEST from the control unit 16, and whether the connected power source is a lithium battery, The type of power source such as an AA battery is determined, the determination result is output to the control unit 16, and the signal BAT_KIND indicating the type of power source is input to the collector of the transistor Q6 of the discharge circuit 11b. A control signal is input to the base of the discharge circuit 11b according to the result.

  The discharge circuit 11b is turned on according to the determination result of the determination circuit 12, and discharges the charge of the AA battery as the power source 20b and the power line from the AA battery to the selection circuit 13a.

  The signal BAT_KIND changes from high (H) to low (L) when, for example, an AA battery is attached to the power source 20b and high (H) is input, and the discharge circuit 11b is turned on. When no AA battery is attached to 20b, it remains high (H).

  As shown in FIG. 2, the power supply unit 10 has a discharge circuit on the side of the power supply 20a to which the lithium battery is mounted connected downstream of the selection circuit 13a, that is, between the selection circuit 13a and UNREG1. However, the discharge circuit on the power supply 20a side may be a discharge circuit 11a connected between the power supply 20a and the selection circuit 13a as shown in FIG. The configuration of the discharge circuit 11a itself is the same as that of the discharge circuit 14, and discharges the charge of the AA battery as the power source 20b and the power line from the AA battery to the selection circuit 13a.

  Further, as shown in FIGS. 2 and 3, the power supply unit 10 is not limited to the one in which the discharge / discrimination circuit is connected only to the power supply 20b side where the AA battery is mounted. As shown in FIG. 5, the discrimination / discharge circuit in which the discrimination circuit 12 and the discharge circuit 11a are integrated is upstream of the selection circuit 13a, that is, between the selection circuit 13a and the power source 20a, or downstream of the selection circuit 13a. It may be connected to the side. The discrimination circuit 12 of this discrimination / discharge circuit has the same configuration as that of the discrimination circuit 12 connected to the power source 20b side in FIGS. 2 and 3, and the same reference numerals are given and description thereof is omitted. The discharge circuit 11a has the same configuration as that of the discharge circuit 11a of FIG. 3, and the same reference numerals are given and description thereof is omitted.

  Further, the power supply unit 10 uses, as the selection circuits 13a and 13b, parasitic diodes of the MOSFETs Q2a and Q2b in opposite directions to the power supplies 20a and 20b, but as shown in FIG. MOSFETs Q12a and Q12b which are forward from the power sources 20a and 20b in the direction of the load UNREG1 may be used. In this case, the load UNREG1 is opposite to the load direction between the selection circuits 13a and 13b. It is necessary to provide a selection circuit 40 having a MOSFET Q42 serving as a parasitic diode in the direction. The selection circuit 40 is basically the same as the other selection circuits 13a and 13b, and a small signal amplification transistor Q41 (2SC4081 and the like) for amplifying the control signals DCCTL_DIV, DCCTL_T3 and the like from the control unit 16 and the transistor. Resistor Rc and capacitor Cc which are turned on / off by the operation of Q41 and connected in parallel to MOSFET Q42 and MOSFETs Q2a and Q2b which connect / cut off the outputs of selection circuits 13a and 13b and UNREG1 on the load side to realize a soft start function And the like, and the MOSFET Q42 is turned on / off by the control signals DCCTL_DIV, DCCTL_T3 from the control unit 16 to the transistor Q41 to connect / cut off the power supply line, and when the transistor Q42 is turned on, the resistor Rc and the capacitor C Perform a soft start by composed of soft-start function unit Fsc in.

  Next, the operation of this embodiment will be described. The image recording apparatus 1 having the power supply unit 10 of the present embodiment can be mounted with various power sources such as AA batteries and lithium batteries (Li batteries) on a plurality of types of power sources 20a to 20n. If the selection unit 13 connects the connected power supplies 20a to 20n to the load using the soft start function, and the determination is wrong. Ensure safety.

  In the following description, in order to simplify the description, it is assumed that a power source 20a to which a lithium battery is attached and a power source 20b to which an AA battery is attached are provided as power sources.

  That is, as shown in FIG. 6, when the lithium battery or the AA battery is attached (inserted) to the power source 20a or the power source 20b (step S101), the power source unit 10 is controlled by the control unit 16 as a sub CPU (SUB CPU). Is reset (step S102), and the remaining charges stored in the soft start function unit Fsa of the selection circuit 13a and the soft start function unit Fsb of the selection circuit 13b are discharged, and the discharge circuit 11a and the discharge circuit 14 or the discharge circuit are discharged. 11a and the discharge circuit 11b are discharged the remaining charge on the power supply line (step S103), the power supply voltage is read (step S104), and the number of readings or the elapsed time is counted (step S105). In the following description, the description will be based on the number of readings.

  When the number of readings is counted, the control unit 16 checks whether the number of readings is equal to or less than a predetermined number (predetermined value) set in advance (step S106). It is checked whether the voltage is equal to or lower than a predetermined voltage (predetermined value) set in advance (step S107).

  When it is not less than or equal to the predetermined value in step S107, the control unit 16 returns to step S105 and performs the same processing as described above from the count of the number of readings to check whether the number of readings reaches the predetermined value or the power supply voltage reaches the predetermined value. If the number of readings reaches a predetermined value in step S106 or the power supply voltage becomes lower than the predetermined value in step S107, the control unit 16 determines whether the power source is a lithium battery. Then, determination of whether the battery is an AA battery is started (step S108), and after waiting for a predetermined time (predetermined value) set in advance (step S109), the determination value is read (step S110), and the power supply voltage is determined. Is stopped (step S111), and it is checked whether the mounted power source is an AA battery (step S112).

  In step S112, when the AA battery is attached, the control unit 16 controls the selection circuits 13a and 13b to turn on the selection circuit 13a connected to the power source 20a to which the AA battery is attached. Then, the AA battery is connected to the other unit 30 as the load, and the power control process is terminated (step S113).

  In step S112, when the AA battery is not attached, the control unit 16 determines that the lithium battery is attached and controls the selection circuits 13a and 13b to attach the lithium battery. The selection circuit 13b connected to the power supply 20b is turned on, the lithium battery is connected to the other unit 30 as a load, and the power supply control process is terminated (step S114).

  Even when the number of readings reaches the predetermined value in step S106, the power source determination is started and the process proceeds to the power source connection process when the remaining charge is not completely discharged or the discharge circuit Does not function, the detection circuit does not function, or some kind of failure occurs such as the determination circuit or selection unit does not function and the remaining charge is unknown, or the determination circuit determines that multiple power supplies are connected Sometimes, when the number of readings reaches a predetermined value, the discharge operation and the detection operation are stopped, the process proceeds to the power supply connection process, the power supply unit 10 is reliably energized, and the operation is enabled. Improve usability.

  Further, in the image recording apparatus 1 having the power supply unit 10 of the present embodiment, when the power supply voltage read count reaches a predetermined number (predetermined value) before the power supply voltage read in the power supply control process falls below a predetermined value, It may be handled as an error.

  That is, as shown in FIG. 7, in the power supply unit 10, when a lithium battery or an AA battery is attached (inserted) to the power supply 20a or the power supply 20b (step S201), the control unit 16 becomes a sub CPU (SUB CPU). Is reset (step S202), and the remaining charges stored in the soft start function unit Fsa of the selection circuit 13a and the soft start function unit Fsb of the selection circuit 13b are discharged, and the discharge circuit 11a and the discharge circuit 14 or the discharge circuit are discharged. 11a and the discharge circuit 11b are discharged the remaining charge of the power supply line (step S203), the power supply voltage is read (step S204), and the number of readings or the elapsed time is counted (step S205). In the following description, description will be made based on the number of reading times.

  When the number of readings is counted, the control unit 16 checks whether the number of readings is equal to or less than a predetermined number (predetermined value) set in advance (step S206). It is checked whether the voltage is equal to or lower than a predetermined voltage (predetermined value) set in advance (step S207).

If it is not less than or equal to the predetermined value in step S207, the control unit 16 returns to step S205 and performs the same processing as described above from the count of the number of readings to check whether the number of readings reaches the predetermined value or whether the power supply voltage reaches the predetermined value. (Steps S205 to S207),
If the number of readings reaches the predetermined value in step S206 before the power supply voltage becomes equal to or lower than the predetermined value in step S207, the control unit 16 is in a state where the remaining charge cannot be completely discharged or cannot be detected. Is determined, error processing is executed, and the processing is terminated (step S208). This error processing includes, for example, stopping the sequence after an error, displaying an error warning on an LCD (Liquid Crystal Display) or LED (Light Emitting Diode) in the display unit, or an error warning sound by a speaker or buzzer in the audio unit And output error warning messages. When the user cancels the error according to the error process and the battery (power supply) is inserted again, the control unit 16 starts the power control process again from the process of step S201. As this error cancellation processing, for example, insertion / extraction of a battery (power supply), pressing of a reset button, and the like are performed.

  If the power supply voltage falls below the predetermined value in step S207 before the number of readings reaches the predetermined value in step S206, the control unit 16 determines whether the power source type is a lithium battery or an AA battery. The determination of whether or not there is started (step S209), and after waiting for a predetermined time (predetermined value) set in advance (step S210), the determination value is read (step S211), and the determination of the power supply voltage is stopped (step S211). Step S212), it is checked whether the mounted power supply is an AA battery (step S213).

  In step S213, when the AA battery is attached, the control unit 16 controls the selection circuits 13a and 13b to turn on the selection circuit 13a connected to the power source 20a to which the AA battery is attached. Then, the AA battery is connected to the other unit 30 as the load, and the power supply control process is terminated (step S214).

  In step S213, when the AA battery is not attached, the control unit 16 determines that the lithium battery is attached and controls the selection circuits 13a and 13b to attach the lithium battery. The selection circuit 13b connected to the power supply 20b is turned on, the lithium battery is connected to the other unit 30 as a load, and the power supply control process is terminated (step S215).

  As described above, in the image recording apparatus 1 including the power supply unit 10 according to the present embodiment, the power supply unit 10 uses one of the plurality of power supplies 20a to 20n from the mountable power supplies 20a to 20n. The remaining charge of the soft start function units Fsa, Fsb, and Fsc of the selection unit 13 among the power supply line up to the selection unit 13 having the soft start function or the power supply lines after the selection unit 13 is selected. At the same time, the discharge circuit 11a-11n discharges the remaining charges of the power supply line to which the power supplies 20a-20n are not connected or all the power supply lines to a predetermined time or a predetermined voltage, so that the determination circuit 12 has the mounted power supplies 20a-20n. The selection unit 13 selects the power sources 20a to 20n determined by the determination circuit 12 as the power sources to be used.

  Therefore, it is possible to quickly and accurately determine the mounted power sources 20a to 20n by preventing the power source determination from being mistaken due to the load that shifts the selection unit 13 to the OFF state due to the presence of residual charges of the soft start function units Fsa, Fsb, and Fsc Even if the determination is wrong, the power source 20a to 20n to which the selection unit 13 is not mounted is selected, the power is not supplied and the operation is not performed, and the safety is improved. Can do.

  In addition, the image recording apparatus 1 including the power supply unit 10 of the present embodiment selects one of the plurality of power supplies 20a to 20n as the use power source from the plurality of power supplies 20a to 20n that can be mounted, and accumulates charges. Of the power supply line up to the selection unit 13 having the soft start function used and / or the power supply line after the selection unit 13, discharge of the residual charges of the power supply line to which the power supplies 20 a to 20 n are not connected or all the power supply lines is performed. The discharge circuits 11a to 11n perform a predetermined time or a predetermined voltage, and the remaining charges of the soft start function units Fsa, Fsb, and Fsc of the selection circuits 13a, 13b, and 40 are discharged, and the detection circuit 15 uses the power sources 20a to 20n. To the power line from the power supply line to the selection unit 13 and / or the remaining charge on the power supply line after the selection unit 13 is detected, and the determination circuit 12 Was with reference to the residual charge to determine the mounting power 20 a to 20 n, the selection unit 13 has selected the power is determined in the determination circuit 12 as the power supply used.

  Therefore, it is possible to quickly and more accurately determine the mounted power sources 20a to 20n. Even if the determination is incorrect, a power source that is not mounted with the selection unit 13 is selected and no power is supplied. Safety can be improved only by not performing the operation.

  Furthermore, the image recording apparatus 1 including the power supply unit 10 of the present embodiment has the soft start function units Fsa, Fsb, and the selection circuits 13a, 13b, and 40 before the determination circuit 12 determines the mounted power supplies 20a to 20n. While discharging the residual charge of Fsc or after discharging, the discharge of the residual charge by the discharge circuits 11a to 11n and the detection of the residual charge by the detection circuit 15 are started.

  Accordingly, unnecessary power consumption of the connected power sources 20a to 20n can be prevented and power saving can be achieved, and at least the remaining charge is eliminated before the power source is determined or the voltage is reduced to a predetermined voltage. Accurate power supply discrimination can be performed.

  In addition, the image recording apparatus 1 including the power supply unit 10 according to the present exemplary embodiment discharges after or after discharging the remaining charges of the soft start function units Fsa, Fsb, and Fsc of the selection circuits 13a, 13b, and 40. The discharge of the remaining charge by the circuits 11a to 11n and the detection of the remaining charge by the detection circuit 15 are performed in parallel or based on a predetermined priority order.

  Therefore, for example, when the residual charge is detected first and the residual charge is lost or has decreased to a predetermined voltage, it is not necessary to perform the discharge operation, and the power supply is determined more efficiently. In addition, if the discharge operation and the detection operation are performed simultaneously, the remaining charge can be discharged and detected in the shortest time, and the mounted power source can be determined more quickly and accurately.

  Furthermore, the image recording apparatus 1 having the power supply unit 10 of the present embodiment is selected when the remaining charge detected by the detection circuit 15 is lowered to a predetermined set value but is not in a state where the power can be detected by the determination circuit 12. The soft start function units Fsa, Fsb, and Fsc of the circuits 13a, 13b, and 40 are discharged, the discharge process by the discharge circuits 11a to 11n and the detection process by the detection circuit 15 are stopped. Is selected.

  Therefore, it is possible to reliably energize the power supply unit 10, enable operation, and improve usability.

  In addition, the image recording apparatus 1 including the power supply unit 10 according to the present embodiment is configured so that the software of the selection circuits 13a, 13b, and 40 is not used when the determination circuit 12 is not in a power supply detectable state within a predetermined setting condition. The discharge processing of the remaining charges of the start function units Fsa, Fsb, and Fsc, the discharge processing by the discharge circuits 11a to 11n and the detection processing by the detection circuit 15 are stopped, and predetermined error processing is executed.

  Therefore, danger can be avoided and safety can be further improved.

  In the above embodiment, the case where the discharge circuits 11a to 11n and the discharge circuit 14 are provided and the detection circuit 15 is provided only between the selection unit 13 and the other unit 30 has been described. , Or a detection circuit similar to the detection circuit 15 is provided in each power supply line in parallel with the discharge circuits 11a to 11n, and the power supply lines from the power supplies 20a to 20n to the selection unit 13 or the selection unit 13 and subsequent ones are provided. The detection circuit 15 detects the remaining charge on the power supply line, the determination circuit 12 refers to the detected remaining charge to determine the mounted power supplies 20a to 20n, and the selection unit 13 determines the power supply determined by the determination circuit 12. You may select 20a-20n as a use power supply.

  Therefore, the mounted power supplies 20a to 20n can be discriminated more quickly and accurately. Even if the discrimination is wrong, the power sources 20a to 20n to which the selection unit 13 is not mounted are selected and the power source is selected. Is not supplied and no operation is performed, and safety can be improved.

  The invention made by the present inventor has been specifically described based on the preferred embodiments. However, the present invention is not limited to the above, and various modifications can be made without departing from the scope of the invention. Needless to say.

  A plurality of types of power sources are detachably mounted, a power source device that accurately determines the type of the power source that is mounted and supplies an appropriate power source, a digital still camera equipped with the power source device, an image recording device such as a printer, etc. It can be applied to other electronic devices.

1 is a block diagram of a main part of a power supply unit of an image recording apparatus to which an embodiment of a power supply device and an electronic apparatus of the present invention is applied. The circuit block diagram of a power supply part in case a mounting power supply is a lithium battery and an AA battery. The circuit block diagram of a power supply part in case the discharge circuit by the side of the lithium battery of FIG. 2 is connected to the lithium battery side rather than the selection circuit. FIG. 4 is a circuit configuration diagram of a power supply unit when the discharge circuit of FIG. 3 also includes a determination circuit. The circuit block diagram of a power supply part in case the parasitic diode of MOSFET of a selection circuit is a forward direction with respect to a load direction. The flowchart which shows the power supply control process by the power supply part of FIG. The flowchart which shows the power supply control process accompanied by the error process by the power supply part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image recording apparatus 10 Power supply part 11a-11n Discharge circuit 12 Discriminating circuit 13 Selection part 13a, 13b Selection circuit Ra, Rb, Rc Resistance Ca, Cb, Cc Capacitor Fsa, Fsb, Fsc Soft start function part 14 Discharge circuit 15 Detection circuit 16 Control unit 20a to 20n Power source 30 Other unit Q1a, Q1b, Q3, Q41 Transistor Q2a, Q2b, Q42 MOSFET

Claims (10)

  A power supply device that can be used by switching between a plurality of power supplies, comprising: a power supply discriminating means for detecting a power supply mounted among the plurality of power supplies; and a soft start function unit for performing a soft start using charge accumulation A power source selection unit that selects one of the plurality of power sources as a power source to be used; a power source line from the power source to the power source selection unit and / or a discharge unit that discharges a remaining charge on the power source line after the power source selection unit; The power source selection means discharges the residual charge of the soft start function unit and discharges the residual charge of a power line or all power lines not connected to the discharge means to a predetermined time or a predetermined voltage. And causing the power source discriminating unit to discriminate the mounted power source, and using the power source discriminated by the power source discriminating unit as a power source for use in the power source selecting unit. Power supply, characterized in that it comprises a control means for-option, a.   A power supply device that can be used by switching between a plurality of power supplies, comprising: a power supply discriminating means for detecting a power supply mounted among the plurality of power supplies; and a soft start function unit for performing a soft start using charge accumulation A power source selection unit that selects one of the plurality of power sources as a power source to be used, and a residual charge detection unit that detects a residual charge of a power line from the power source to the power source selection unit and / or a power line after the power source selection unit And after causing the power source selection means to discharge the residual charge of the soft start function unit, or causing the residual charge detection means to detect the residual charge while discharging the residual charge, The power source discriminating unit is caused to refer to the residual charge detected by the residual charge detecting unit to discriminate the mounted power source, and the power source selected by the power source discriminating unit is used as the power source selected. Power supply, characterized in that it and a control means for selectively to stage.   A power supply device that can be used by switching between a plurality of power supplies, comprising: a power supply discriminating means for detecting a power supply mounted among the plurality of power supplies; and a soft start function unit for performing a soft start using charge accumulation A power source selection unit that selects one of the plurality of power sources as a power source to be used, and a residual charge detection unit that detects a residual charge of a power line from the power source to the power source selection unit and / or a power line after the power source selection unit Discharging means for discharging a remaining charge of a power line from the power source to the power source selecting means and / or a power line after the power source selecting means, and discharging the residual charge of the soft start function unit to the power source selecting means And the discharge of the residual charges on a power line or all power lines not connected to the power source for a predetermined time or place. To the voltage, let the residual charge detection means detect the residual charge, let the power supply determination means refer to the residual charge detected by the residual charge detection means, determine the mounted power supply, and determine the power supply And a control unit that causes the power source selection unit to select the power source determined by the unit as a power source to be used.   The controller is configured to discharge the residual charge of the soft start function unit to the power selection unit or to discharge the residual charge before performing the determination of the mounted power by the power determination unit. 4. The power supply device according to claim 1, wherein discharge of the remaining charge by means and / or detection of remaining charge by the remaining charge detection means is started. 5.   The control means is configured to discharge the residual charge by the discharge means and the residual charge detection means after discharging the residual charge of the soft start function unit to the power source selection means or while discharging the residual charge. 4. The power supply device according to claim 3, wherein the detection of the residual charge is performed in parallel or based on a predetermined priority.   When the residual charge detected by the residual charge detection means is reduced to a predetermined set value, but is not in a power supply detectable state by the power supply determination means, the control means The discharge processing of residual charge, the discharge processing by the discharge means, and / or the detection processing by the residual charge detection means are stopped, and the power supply selection means is made to select at least one power supply. 4. The power supply device according to any one of 3.   When the control means does not enter a power supply detectable state by the power supply determination means within a predetermined setting condition set in advance, the remaining charge of the soft start function unit is discharged by the power supply selection means, and the discharge means 4. The power supply device according to claim 1, wherein discharge processing or / and detection processing by the residual charge detection unit are stopped, and predetermined error processing is executed. 5.   An electronic apparatus provided with a power supply device that can be used by switching a plurality of power supplies, wherein the power supply device uses a power source discriminating means for detecting a mounted power source among the plurality of power sources and charge accumulation. A power selection unit that includes a soft start function unit that performs soft start and selects one of the plurality of power sources as a power source to be used, and a power line from the power source to the power source selection unit and / or a power source after the power source selection unit Discharging means for discharging the residual charge of the line; and causing the power supply selection means to discharge the residual charge of the soft start function unit, and the power supply line not connected to the power supply to the discharge means or the remaining power supply line of all power supply lines. The electric power is discharged until a predetermined time or a predetermined voltage so that the power source discriminating unit discriminates the mounted power source, and the power source discriminated by the power source discriminating unit is determined. Electronic apparatus, characterized in that a use power is provided and a control means for selectively to the power selection means.   An electronic apparatus provided with a power supply device that can be used by switching a plurality of power supplies, wherein the power supply device utilizes a power discriminating means for detecting a power supply mounted among the plurality of power supplies, and charge accumulation. A power selection unit that includes a soft start function unit that performs a soft start and selects one of the plurality of power sources as a power source to be used, a power line from the power source to the power source selection unit, and / or a power source after the power source selection unit Residual charge detection means for detecting the residual charge of the line, and the residual charge detection means after discharging the residual charge of the soft start function unit to the power supply selection means or while discharging the residual charge The remaining power is detected, and the power source discriminating device is caused to discriminate the mounted power source by referring to the remaining electric charge detected by the residual charge detecting unit, and the power source discriminating unit discriminates. An electronic apparatus characterized by comprising control means for selectively to said power selection means a source as the power supply used, the. An electronic apparatus provided with a power supply device that can be used by switching a plurality of power supplies, wherein the power supply device uses a power source discriminating means for detecting a mounted power source among the plurality of power sources and charge accumulation. A power selection unit that includes a soft start function unit that performs soft start and selects one of the plurality of power sources as a power source to be used, and a power line from the power source to the power source selection unit and / or a power source after the power source selection unit A residual charge detecting means for detecting a residual charge on the line, a power supply line from the power supply to the power supply selection means and / or a discharge means for discharging the residual charge on the power supply line after the power supply selection means, and the power supply selection means The remaining charge of the soft-start function unit is discharged, and before the power supply line or all power supply lines to which the power supply is not connected to the discharge means The residual charge is discharged for a predetermined time or a predetermined voltage, the residual charge detection unit is caused to detect the residual charge, and the power source determination unit is referred to the residual charge detected by the residual charge detection unit. An electronic apparatus comprising: a control unit that determines a mounted power source and causes the power source selection unit to select the power source determined by the power source determination unit as a power source to be used.

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