JP2006285605A - Power supply apparatus, recording apparatus including the power supply apparatus, electronic apparatus, and power supply system including the recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device capable of preventing a driving means from stopping when a battery is out of power while being driven with a simple configuration, a recording device and an electronic device provided with the power supply device, and power provided with the recording device. To provide a supply system.
A battery 230 that supplies power to a drive unit 290, an auxiliary battery 240 that supplies at least predetermined power to the drive unit 290, a remaining amount detection circuit 250 that detects a remaining amount of the battery 230, and a drive The switches SW11 and SW12 that switch the power supply to the unit 290 between the battery 230 and the auxiliary battery 240, and the output control circuit 260 that controls the switches SW11 and SW12 are provided. Further, the output control circuit 260 operates the switches SW11 and SW12 based on the detection signal transmitted from the remaining amount detection circuit 250. Thereby, it can prevent with a simple structure that the drive part 290 stops during a drive.
[Selection] Figure 2

Description

  The present invention relates to a power supply device used in an electronic apparatus such as a recording device driven by battery power, and a power supply system including the recording device.

  There are roughly three methods for detecting the remaining amount of the secondary battery in a conventional electronic device such as a recording device driven by the secondary battery. One method is a method of detecting the remaining battery level by integrating the amount of power charged in the secondary battery and the amount of power discharged from the secondary battery (see, for example, Patent Document 1). One is a method of detecting the battery voltage during discharging during normal operation and detecting the remaining battery capacity compared with a predetermined voltage (see, for example, Patent Document 2). Furthermore, in order to improve the accuracy of the battery voltage detection method, a large current load that consumes a large current is used, and a switch that directly supplies power from the battery to the large current load is provided to provide a large current pulse load to the battery. There is a method of determining the remaining battery level by detecting the battery voltage at that time (see, for example, Patent Document 3).

JP 2003-186098 A JP 2001-045678 A JP 2000-171533 A

  Although the method disclosed in Patent Document 1 described above can be detected with a predetermined power remaining, there is a problem that the structure of hardware and software becomes complicated.

  Further, according to the method disclosed in Patent Document 2, it is possible to easily detect the remaining amount when there is almost no remaining battery level. However, in an electronic apparatus such as a recording apparatus, if the driving unit stops due to the battery power being cut off while driving, the recording unit is stopped during printing of the recording medium, and the pages being printed on the ink and the recording medium are wasted. There was a problem. Therefore, although it is necessary to detect whether the secondary battery has enough power to print one page, it is very difficult to detect with a predetermined power remaining. This is because the relationship between the battery voltage and the remaining battery level varies greatly depending on power consumption, battery temperature, and the like. For this reason, there is a problem in that the detection accuracy is deteriorated, and even when the remaining battery level is detected, predetermined power does not remain and the driving unit stops during driving.

  Further, in the method shown in Patent Document 3, it is necessary to provide means for flowing a large current during driving, and there is a problem that the structure becomes complicated as in the method shown in Patent Document 2.

  The present invention has been made in view of the various problems as described above, and an object of the present invention is to provide a power supply device that can prevent a driving unit from stopping when the battery is out of power while driving, with a simple configuration, It is an object of the present invention to provide a recording apparatus and an electronic apparatus provided with the power supply device, and a power supply system provided with the recording device.

  To achieve the above object, in the power supply apparatus of the present invention, a first battery that supplies power to the driving means, a second battery that supplies at least predetermined power to the driving means, and the first battery Detection means for detecting a remaining battery level, switching means for switching power supply to the driving means between the first battery and the second battery, and control means for controlling the switching means. In the power supply apparatus, the control unit operates the switching unit based on a detection signal transmitted from the detection unit.

  As a result, even when the power of the first battery is cut off, it is easy to stop the driving means during driving by operating the switching means and supplying the power remaining in the second battery to the driving means. Can be prevented by configuration.

  In the power supply device of the present invention, the first battery that supplies power to the driving means, the second battery that supplies at least predetermined power to the driving means, and the remaining amount of the first battery Detecting means for detecting voltage, boosting means for boosting a voltage supplied from the first battery or the second battery, and supplying the boosting means to the driving means; and supplying power to the boosting means to the first battery In the power supply apparatus comprising: an output switching unit that switches between the second battery and an output control unit that controls the output switching unit; and a drive control unit that controls the driving unit. When the power of the first battery is reduced to a predetermined value, a detection signal is transmitted to the drive control means, and the drive control means detects an operating state of the drive means based on the detection signal, When the driving means is driving The output control means transmits the output switching signal, and the output control means operates the output switching means based on the output switching signal to increase the power of the second battery instead of the first battery. It is characterized by supplying to the means.

  As a result, when the power of the first battery is reduced to a predetermined value, if the driving means is being driven, the power of the second battery can be supplied to the boosting means and the above operation can be terminated. Therefore, it is possible to prevent the driving means from stopping during driving with a simple configuration.

  In the power supply device of the present invention, the drive control means does not transmit the output switching signal and supplies the power of the first battery to the boosting means when the drive means is on standby. It is characterized by that. As a result, when the power of the first battery is reduced to a predetermined value, if the driving means is on standby, the power remaining in the first battery is supplied to the boosting means and the driving means is stopped. Can do. Therefore, it is not necessary to operate the output switching means, and power consumption can be reduced.

  In the power supply apparatus of the present invention, the first battery and the second battery are chargeable / dischargeable secondary batteries. Thereby, when power remains in the first battery and the second battery, only the consumed power is charged, so that the power remaining in the first battery and the second battery can be effectively utilized.

  Further, in the power supply device of the present invention, the charging means for charging the first battery and the second battery, and the power supply from the charging means is supplied to the first battery and the second battery. And an input control means for controlling the input switching means. The input control means operates the input switching means to operate the first battery or the second battery. After charging any one of the batteries, the input switching unit is operated again to charge the other of the batteries.

  Thereby, even when the capacity | capacitance of a 1st battery and a 2nd battery differs, it can charge. Therefore, the capacity of the second battery can be made smaller than the capacity of the first battery.

  In the power supply device of the present invention, the first battery that supplies power to the driving means, the second battery that supplies at least predetermined power to the driving means, and the remaining amount of the first battery Detecting means for detecting voltage, boosting means for boosting a voltage supplied from the first battery and the second battery, and supplying the boosting means to the driving means; and power supply from the first battery to the boosting means A first opening / closing means for opening / closing a path; a voltage dropping element for dropping a voltage supplied from the second battery to the boosting means; a second opening / closing means for short-circuiting the voltage dropping element; In the power supply apparatus comprising: output control means for controlling the opening / closing means and the second opening / closing means; and drive control means for controlling the drive means, the detection means is configured such that the power of the first battery is a predetermined value. If the drive A detection signal is transmitted to the means, and the drive control means detects an operating state of the drive means based on the detection signal, and transmits an output switching signal when the drive means is driving, and the output The control means closes the second opening / closing means after opening the first opening / closing means based on the output switching signal.

  As a result, when the power of the first battery is reduced to a predetermined value, if the driving means is being driven, the second opening / closing means is closed to short-circuit the voltage drop element, thereby remaining in the second battery. The electric power to be supplied can be supplied to the boosting means, and the above operation can be terminated. Therefore, it is possible to prevent the driving means from stopping during driving with a simple configuration.

  In the power supply device of the present invention, the drive control means does not transmit the output switching signal when the drive means is in standby, and supplies the power of the first battery and the second battery. The boosting means is supplied. As a result, when the power of the first battery is reduced to a predetermined value, if the driving means is on standby, the power of the first battery and the second battery is supplied to the boosting means, and the driving means is stopped. Can be. Therefore, it is not necessary to close the second opening / closing means after opening the first opening / closing means, and power consumption can be reduced.

  In the power supply apparatus of the present invention, the first battery and the second battery are chargeable / dischargeable secondary batteries. Thereby, when power remains in the first battery and the second battery, only the consumed power is charged, so that the power remaining in the first battery and the second battery can be effectively utilized.

  In the power supply device of the present invention, the charging means for charging the first battery and the second battery, and the reverse flow that flows from the first battery and the second battery to the charging means during discharging. And a reverse current blocking means for blocking current, wherein the charging means includes a voltage monitoring means for monitoring a voltage on the first battery side of the reverse current blocking means, the first battery, and the first battery. The voltage monitoring means is characterized in that, when the voltage on the first battery side reaches a predetermined value, charging by the charging circuit is stopped.

  Thereby, since the electric power of a 1st battery and a 2nd battery is not supplied to a charging means by a reverse current prevention means at the time of discharge, said electric power can be efficiently supplied to a pressure | voltage rise means.

  Further, in the power supply device of the present invention, a charging unit that charges the first battery and the second battery, and a third path that opens and closes a path from the second battery to the first battery. In the case of comprising an opening / closing means and a current monitoring means for monitoring a current flowing through the third opening / closing means, the charging means comprises a voltage monitoring means for monitoring the voltage of the first battery, and the third monitoring means. An opening / closing control means for opening / closing the opening / closing means; and a charging circuit for simultaneously charging the first battery and the second battery, wherein the voltage monitoring means has a voltage of the first battery equal to or lower than a predetermined value. In this case, the opening / closing control means closes the third opening / closing means, and the current monitoring means monitors the current flowing through the third opening / closing means closed by the opening / closing control means, and the current is substantially reduced. When zero, both charging circuits It is characterized in that to charge the battery.

  As a result, when the voltage of the first battery is equal to or lower than the predetermined value, the potential difference between the first battery and the second battery is large and the first battery and the second battery cannot be charged simultaneously from the charging circuit. Thus, the third opening / closing means can be closed to make the potential difference between the first battery and the second battery substantially zero. Therefore, the current flowing through the third opening / closing means is monitored, and when the current becomes substantially zero, it is determined that the potential difference between the first battery and the second battery has become substantially zero, and the charging circuit simultaneously Can be charged.

  In addition, an electronic apparatus according to the present invention is characterized by including each of the power supply devices described above. Thereby, the electronic device which has said each effect can be provided.

  The recording apparatus of the present invention is a recording apparatus for recording on a recording medium, and is characterized by including each of the above-described power supply devices. Thereby, a recording apparatus that exhibits the above-described effects can be provided.

  In the power supply system of the present invention, a first battery that supplies power to the drive means, a detection means that detects the remaining amount of the first battery, and a drive control means that controls the drive means, A power supply system comprising: a recording device including: an information processing terminal including at least a second battery that supplies predetermined power; and a cable capable of transmitting a signal and power for connecting the recording device and the information processing terminal. The recording apparatus further boosts the voltage supplied from the first battery or the second battery, supplies the driving means to the boosting means, and supplies power to the boosting means to the first battery. Output switching means for switching between the second battery and the second battery, and output control means for controlling the output switching means, wherein the detection means reduces the power of the first battery to a predetermined value. In case A detection signal is transmitted to the drive control unit, and the drive control unit detects an operation state of the drive unit based on the detection signal, and transmits the output switching signal when the drive unit is on standby. First, when the driving means is driving, an output switching signal is transmitted, and based on the output switching signal, the output control means operates the output switching means to replace the first battery, instead of the first battery. The power of the second battery is supplied to the boosting means.

  As a result, even when the power of the first battery in the recording apparatus drops to a predetermined value, the output switching means is operated to supply the power remaining in the second battery built in the information processing terminal to the boosting means. By doing so, it is possible to prevent the driving means from stopping during driving with a simple configuration.

  In the power supply system of the present invention, the first battery that supplies power to the driving means, the second battery that supplies at least predetermined power to the driving means, and the remaining amount of the first battery Detecting means for detecting voltage, boosting means for boosting a voltage supplied from the first battery or the second battery, and supplying the boosting means to the driving means; and supplying power to the boosting means to the first battery Output switching means for switching between the first battery and the second battery, output control means for controlling the output switching means, and drive control means for controlling the driving means, wherein the detection means comprises the first When the battery power is reduced to a predetermined value, a detection signal is transmitted to the drive control means, the drive control means detects an operating state of the drive means based on the detection signal, and the drive means Output switching signal when in standby Instead of transmitting, when the driving means is driving, an output switching signal is transmitted, and based on the output switching signal, the output control means operates the output switching means to replace the first battery. A recording device for supplying the power of the second battery to the boosting means, an information processing terminal comprising a third battery, a cable for transmitting signals and power for connecting the recording device and the information processing terminal, and The first battery and the second battery are charged from the third battery via a cable capable of transmitting the signal and power.

  As a result, even when the power of the first battery in the recording apparatus drops to a predetermined value, the output switching means is operated to supply the power remaining in the second battery in the recording apparatus to the boosting means. It is possible to prevent the driving means from stopping during driving with a simple configuration. Furthermore, the driving means can be driven again by charging the first battery and the second battery in the recording device from the third battery in the information processing terminal.

  In the power supply system of the present invention, the first battery that supplies power to the driving means, the second battery that supplies at least predetermined power to the driving means, and the remaining amount of the first battery Detecting means for detecting voltage, boosting means for boosting a voltage supplied from the first battery and the second battery, and supplying the boosting means to the driving means; and power supply from the first battery to the boosting means A first opening / closing means for opening / closing a path; a voltage dropping element for dropping a voltage supplied from the second battery to the boosting means; a second opening / closing means for short-circuiting the voltage dropping element; An output control means for controlling the opening / closing means and the second opening / closing means; and a drive control means for controlling the driving means, wherein the detection means is configured to reduce the power of the first battery to a predetermined value. In addition, a detection signal is sent to the drive control means. The drive control means detects an operating state of the drive means based on the detection signal, and does not transmit an output switching signal when the drive means is in standby, and the drive means is being driven. A recording device that transmits the output switching signal, and based on the output switching signal, the output control means opens the first opening / closing means and then closes the second opening / closing means; In a power supply system comprising an information processing terminal comprising a battery and a cable capable of transmitting a signal and power connecting the recording device and the information processing terminal, via the cable capable of transmitting the signal and power, The first battery and the second battery are charged from the third battery.

  Thus, even when the power of the first battery in the recording apparatus is reduced to a predetermined value, after the first opening / closing means is opened, the second opening / closing means is closed, and the second opening / closing means in the recording apparatus is closed. By supplying the electric power remaining in the battery to the boosting unit, it is possible to prevent the driving unit from stopping during driving with a simple configuration. Furthermore, the driving means can be driven again by charging the first battery and the second battery in the recording device from the third battery in the information processing terminal.

  As an example of the “electronic device” according to the present invention, an ink jet printer 100 which is one of recording apparatuses will be taken up and an embodiment of the present invention will be described with reference to FIG. The embodiments described below do not limit the invention according to the scope of claims, and all combinations of features described in the present embodiment are essential to the solution means of the invention. Is not limited.

  FIG. 1 is a perspective view of an external configuration of an ink jet printer 100, which is one of recording apparatuses according to an embodiment of the present invention, as viewed from the front side. FIG. 4A shows a state when not in use, and FIG. 4B shows a state when in use. In the following description, “left and right” and “front and back” refer to directions when viewed from the front side of the ink jet printer 100. The ink jet printer 100 is a thin portable printer having a flat rectangular parallelepiped casing 110. The housing 110 includes a lower case 111 formed in a substantially planar shape and an upper case 112 having substantially the same dimensions as the lower case.

  The lower case 111 is formed in a container shape whose upper surface is opened, and main components of the printer 100 are accommodated therein. The upper case 112 is formed in a container shape that is shallower than the lower case 111, and is coupled to the lower case 111 such that the open lower surface of the upper case 112 faces the open upper surface of the lower case 111.

  Further, in the lower case 111, a substantially central portion on the front side of the peripheral wall is cut out as a paper discharge port 113, and a substantially central portion on the back side of the peripheral wall is cut out as an insertion / extraction port 114 for the ink cartridge. The upper case 112 has a rectangular paper feed port 115 formed in a substantially central portion. A paper feed door 116 having a size for closing the paper feed opening 115 is fitted into the paper feed opening 115. The sheet feeding door 116 is pivotally supported by the upper case 112 so as to be pivotable upward from the case surface within an acute angle range with the front end as an axis, and the trailing end is lifted by the pivoting so that the sheet feeding port 115 is opened. It has become.

  A paper holder 117 serving as a lid and a paper receiver is disposed on the upper case 112. The paper holder 117 is formed to have a size so as to cover the substantially central portion of the upper case 112 from the back side to the front side, and the lower case can be swung upwardly from the case surface in an obtuse angle range with the rear end as an axis. 111 is supported on the shaft. As shown in FIG. 1 (A), the paper holder 117 functions as a lid by turning forward and being fitted into a recess 118 formed from the back side to the front side at a substantially central portion of the upper case 112. As shown in FIG. 1 (B), it functions as a paper receiver by turning backward and stopping in a tilted state. Thereby, when the ink jet printer 100 is not used, the paper holder 117 can be stored compactly. The opening / closing of the paper holder 117 and the opening / closing of the paper supply door 116 are interlocked by a link mechanism (not shown).

  FIG. 1A shows a battery 230 that is a power source for operating the ink jet printer 100 and an auxiliary battery 240 or a battery 310. The battery 230 and the auxiliary battery 240 or the battery 310 are disposed around the ink cartridge insertion / removal port 114 of the lower case 111.

  Next, the power supply apparatus 200 according to the first embodiment built in the ink jet printer 100 will be described with reference to FIG.

  FIG. 2 is a circuit diagram of the power supply apparatus 200 according to the first embodiment. The power supply device 200 shown in FIG. 2 includes a charging device 210, an input control circuit 220, a battery 230, an auxiliary battery 240, a remaining amount detection circuit 250, an output control circuit 260, a printer control unit 270, a booster circuit 280, and a drive unit 290. The switches SW11, SW12, SW13, and SW14 are also included. The charging device 210 charges the battery 230 and the auxiliary battery 240. In addition, the battery 230 and the auxiliary battery 240 of the first embodiment are lithium ion batteries (secondary batteries). The input control circuit 220 controls the switches SW13 and SW14 to execute control for closing only one of the switches. The battery 230 supplies the remaining power to the booster circuit 280, and the auxiliary battery 240 supplies power to the booster circuit 280 instead of the battery 230 when the power of the battery 230 becomes a predetermined value or less. The remaining amount detection circuit 250 detects a voltage supplied from the battery 230, and transmits a detection signal when the voltage becomes a predetermined value or less. The output control circuit 260 controls the switches SW11 and SW12 so as to close only one of the switches. The booster circuit 280 boosts the voltage supplied from the battery 230 or the auxiliary battery 240 and supplies the boosted voltage to the driving unit 290. The printer control unit 270 performs overall control of the ink jet printer 100 and determines the state of the printer 100. The drive unit 290 is driven by the voltage supplied from the booster circuit 280 and prints on a recording medium (not shown).

  Here, the circuit configuration of the power supply apparatus 200 will be schematically described. The charging device 210 is connected to the battery 230 via the switch SW13, the auxiliary battery 240, and the input control circuit 220 via the switch SW14. The input control circuit 220 is connected to the switches SW13 and SW14, the charging device 210, and the output control circuit 260. In addition, the booster circuit 280 is connected to the battery 230 via the switch SW11, the auxiliary battery 240 via the switch SW12, and the drive unit 290. The output control circuit 260 is connected to the switches SW11 and SW12, the input control circuit 220, and the printer control unit 270. Further, a remaining amount detection circuit 250 is connected to branch from the path between the battery 230 and the switch SW11. The remaining amount detection circuit 250 is also connected to the printer control unit 270.

  Next, regarding the power supply device 200 having the configuration shown in FIG. First, the output control circuit 260 controls the switch SW11 to close the switch SW11. Thereby, the power of battery 230 is supplied to booster circuit 280. The booster circuit 280 boosts the voltage supplied from the battery 230 to a drive unit driveable voltage, and drives the drive unit 290. Thereafter, when the voltage of the battery 230 gradually decreases in accordance with the power used, for example, 3 V / cell, the remaining amount detection circuit 250 detects the above voltage, and the printer control unit 270 detects the Near End signal (detection). Signal). Note that a general lithium ion battery has almost no electric power remaining when the battery voltage becomes 3 V / cell. Based on the Near End signal (detection signal), the printer control unit 270 determines the operating state of the drive unit 290. Note that in the ink jet printer 100 of the present embodiment, there are three types of operating states: a stopped state, a standby state, and a driving state. The stop state is a state in which the power of the ink jet printer 100 is turned off, and printing is not possible even when printing data is received. The drive state is a state where the drive unit 290 is driven and printing is performed on a recording medium (not shown). The remaining standby is a state of waiting for reception of print data. When shifting from the drive state or standby state to the stop state, a predetermined necessary operation, that is, the drive unit 290 is returned to a home position (not shown) and capping is performed. This prevents problems such as ink being dried by the drive unit 290 and nozzles (not shown) being clogged in a stopped state for a long time. Further, if the battery 230 is stopped due to power failure during driving, it will stop during printing of a recording medium (not shown), and the printing page of ink and the recording medium will be wasted and the driving unit as described above. Since 290 cannot be returned to the home position (not shown) and capping cannot be performed, this may cause problems such as nozzle clogging (not shown).

  Therefore, when the printer control unit 270 determines that the drive unit 290 is in a standby state, the printer control unit 270 causes the drive unit 290 to shift to a stopped state. That is, with the electric power remaining in the battery 230, the drive unit 290 is returned to a home position (not shown) and capped. On the other hand, if it is determined that the printer control unit 270 is in operation, that is, the ink jet printer 100 is printing on a recording medium (not shown), as described above, almost no power remains in the battery 230, so output control is performed. An output switching signal is transmitted to the circuit 260. Based on the output switching signal, the output control circuit 260 opens the switch SW11 and then closes the switch SW12. As a result, the power of the auxiliary battery 240 is supplied to the booster circuit 280. The booster circuit 280 boosts the voltage supplied from the auxiliary battery 240 to the drive unit driveable voltage, and drives the drive unit 290 to print one page being printed. After printing, if unprinted data remains in the print data, the data is stored in a RAM (not shown). Then, the drive unit 290 is shifted to a stopped state. That is, with the power of the auxiliary battery 240, the drive unit 290 is returned to a home position (not shown) and capped. Thereby, it is prevented with a simple structure that the drive unit 290 stops during driving due to the power outage of the battery 230. Thereafter, when the printer control unit 270 determines that the transition to the stop state has been completed, the printer control unit 270 transmits a stop state transition end signal to the output control circuit 260. The output control circuit 260 opens the switch SW11 or SW12 based on the stop state transition end signal.

  Next, regarding the power supply apparatus 200 having the configuration shown in FIG. First, the output control circuit 260 transmits a charge start signal to the input control circuit 220 based on the stop state transition end signal. The input control circuit 220 closes the switch SW14 based on the charging start signal. Thereby, the charging device 210 charges the auxiliary battery 240. That is, the charging device 210 passes a weak current through the auxiliary battery 240 in order to confirm whether the auxiliary battery 240 has a failure due to a short circuit or the like. At that time, the remaining amount of the auxiliary battery 240 is also confirmed. Next, the confirmed auxiliary battery 240 is charged in accordance with the remaining amount. When charging of the auxiliary battery 240 ends, the charging device 210 transmits a charging end signal to the input control circuit 220. Based on the charging end signal, the input control circuit 220 opens the switch SW14 and then closes the switch SW13. Thereby, charging device 210 charges battery 230 in the same procedure as battery 240. When the charging of the battery 230 is completed, the charging device 210 transmits a charging end signal to the input control circuit 220 again. Based on the second charging end signal, the input control circuit 220 opens the switch SW13 and transmits a standby state transition signal to the output control circuit 260. The output control circuit 260 closes the switch SW11 based on the standby state transition signal. Thereby, the power of battery 230 is supplied to booster circuit 280.

  With the circuit configuration shown in FIG. 2 described above, it is possible to prevent the driving unit 290 from stopping during driving due to power outage of the battery 230 with a simple structure. Further, the remaining amount detection circuit 250 transmits a Near End signal (detection signal) when the voltage of the battery 230 is reduced to a predetermined value, for example, 3 V / cell, before the power of the battery 230 is completely consumed. In addition, power remaining in the auxiliary battery 240 can be supplied, and the battery 230 can be charged again. Further, when the voltage of the battery 230 is reduced to a predetermined value, for example, 3 V / cell, even when the driving unit 290 is being driven, that is, during printing, power is supplied from the auxiliary battery 240 and 1 during printing. The page can be printed. Furthermore, a predetermined required operation, that is, the drive unit 290 can be returned to a home position (not shown), and capping can be performed to shift to a stopped state. On the other hand, if the drive unit 290 is on standby, the power remaining in the battery 230 is supplied to the booster circuit 280, and the predetermined required operation, that is, the drive unit 290 is returned to the home position (not shown) to perform capping. By shifting to the stop state, it is not necessary to operate the switch SW11 and the switch SW12, and power consumption can be reduced.

  Further, since the output control circuit 260 closes only one of the switches SW11 and SW12, the power of the battery 230 can be prevented from being supplied to the auxiliary battery 240 or the power of the auxiliary battery 240 can be prevented from being supplied to the battery 230. The power of the battery 230 or the auxiliary battery 240 can be efficiently supplied to the booster circuit 280. Furthermore, since the switch SW12 is closed after the switch SW11 is opened, the switches SW11 and SW12 are not simultaneously closed for a moment, and the power of the auxiliary battery 240 is reliably prevented from being supplied to the battery 230. it can.

  Further, since the input control circuit 220 closes only one of the switches SW13 and SW14, the power of the battery 230 can be prevented from being supplied to the auxiliary battery 240 or the power of the auxiliary battery 240 can be prevented from being supplied to the battery 230. Furthermore, since the switch SW13 is closed after the switch SW14 is opened, the switches SW13 and SW14 are not simultaneously closed for a moment, and the power of the auxiliary battery 240 is reliably prevented from being supplied to the battery 230. it can. Thereby, after charging one of the battery 230 or the auxiliary battery 240, the charging device 210 can charge the other. Therefore, even when the capacities of the battery 230 and the auxiliary battery 240 are different, charging can be performed. Therefore, the capacity of the auxiliary battery 240 can be made smaller than the capacity of the battery 230. Furthermore, charging the auxiliary battery 240 before the battery 230 can prevent the drive unit 290 from being driven by the power of the battery 230 before charging the auxiliary battery 240. In addition, since the input control circuit 220 performs control to open the switch SW13 and the switch SW14 during discharging, the power of the battery 230 or the auxiliary battery 240 can be efficiently supplied to the booster circuit 280. In addition, since the battery 230 and the auxiliary battery 240 are secondary batteries, when power remains in the battery 230 and the auxiliary battery 240, only the consumed power is charged, so that the remaining power can be effectively used.

  Next, a power supply apparatus 300 according to the second embodiment built in the ink jet printer 100 will be described with reference to FIG. The embodiments described below do not limit the invention according to the scope of claims, and all combinations of features described in the present embodiment are essential to the solution means of the invention. Is not limited. Further, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 3 is a circuit diagram of the power supply apparatus 300 according to the second embodiment. 3 includes a charging device 320, a battery 230, a battery 310, a remaining amount detection circuit 250, an output control circuit 260, a printer control unit 270, a boosting circuit 280, a driving unit 290, and switches SW11, SW21, It consists of diodes D1, D2 and D3. The battery 230, the remaining amount detection circuit 250, the booster circuit 280, the printer control unit 270, and the drive unit 290 are the same as those in the first embodiment. On the other hand, the charging device 320 includes a voltage monitoring circuit 321 and a charging circuit 322, and charges the battery 230 and the battery 310. The battery 310 of the second embodiment is also a lithium ion battery (secondary battery). The battery 310 has substantially the same capacity as the battery 230, and supplies power to the booster circuit 280 together with the battery 230. As in the first embodiment, the output control circuit 260 controls the switches SW11 and SW21 and executes control to close only one of the switches. The diode D1 is a voltage drop element, and the diodes D2 and D3 are provided as reverse current blocking means. The voltage monitoring circuit 321 monitors the voltage on the battery 230 side of the diode D2. The charging circuit 322 charges the battery 230 and the battery 310 simultaneously.

  Here, the circuit configuration of the power supply apparatus 300 will be schematically described. The charging device 320 is connected to the battery 230 via the diode D2 and the battery 310 via the diode D3. The booster circuit 280 is connected to the battery 230 via the switch SW11, the battery 310 via the diode D1 and the switch SW21, and the drive unit 290. A remaining amount detection circuit 250 is connected to branch from the path between the battery 230 and the switch SW11. The remaining amount detection circuit 250 is further connected to the output control circuit 260 and the printer control unit 270. The output control circuit 260 is connected to the switches SW11 and SW21, the remaining amount detection circuit 250, and the printer control unit 270.

  Next, regarding the power supply apparatus 300 having the configuration shown in FIG. First, the output control circuit 260 controls the switches SW11 and SW21 to open the switch SW21 and then closes the switch SW11. As a result, the power of the battery 230 and the battery 310 is supplied to the booster circuit 280. The booster circuit 280 boosts the voltage supplied from the battery 230 and the battery 310 to a drive unit driveable voltage, and drives the drive unit 290. Thereafter, when the voltages of the battery 230 and the battery 310 gradually decrease according to the power used and the voltage of the battery 230 becomes 3 V / cell, for example, the remaining amount detection circuit 250 detects the above voltage, and the printer A Near End signal (detection signal) is output to the control unit 270. Note that a general lithium ion battery has almost no electric power remaining when the battery voltage becomes 3 V / cell. Based on the Near End signal (detection signal), the printer control unit 270 determines the operating state of the drive unit 290.

  When the printer control unit 270 determines that the drive unit 290 is in a standby state, the printer control unit 270 causes the drive unit 290 to shift to a stopped state. That is, the drive unit 290 is returned to a home position (not shown) with the power of the battery 230 and the battery 310 and capped. On the other hand, when the printer control unit 270 is being driven, that is, when it is determined that the ink jet printer 100 is printing on a recording medium (not shown), almost no power remains in the battery 230 as described above. An output switching signal is transmitted to the control circuit 260. Based on the output switching signal, the output control circuit 260 opens the switch SW11 and then closes the switch SW21. Thereby, the diode D1 is short-circuited. If the forward voltage of the diode D1 is 0.4V, for example, the voltage of the battery 310 at this time is 3.4V / cell. That is, since electric power remains in the battery 310, the electric power remaining in the battery 310 is supplied to the booster circuit 280. The booster circuit 280 boosts the voltage supplied from the battery 310 to a drive unit driveable voltage, and drives the drive unit 290 to print one page being printed. After printing, if unprinted data remains in the print data, the data is stored in a RAM (not shown). Then, the drive unit 290 is shifted to a stopped state. That is, the remaining power of the battery 310 is used to return the driving unit 290 to a home position (not shown) and perform capping. Thereby, it is prevented with a simple structure that the drive unit 290 stops during driving due to the power outage of the battery 230. In addition, by selecting the diode D1 of the forward voltage according to the capacity of the battery 310, the remaining power of the battery 310 can be changed, not only for one page being printed, but also according to the power remaining in the battery 310, Any number of pages can be printed.

  Next, the operation at the time of charging the battery 230 will be described for the power supply apparatus 300 having the configuration shown in FIG. First, the charging circuit 322 charges the battery 230 via the diode D2 and the battery 310 simultaneously via the diode D3. Diodes D2 and D3 prevent current from flowing from battery 310 to battery 230 during discharging. Further, the power of the battery 230 and the battery 310 is prevented from being supplied to the charging device during discharging. The voltage monitoring circuit 321 monitors the voltage on the battery 230 side of the diode D2. Thereafter, when the voltage on the battery 230 side of the diode D2 becomes a predetermined value, for example, 4.2 V / cell, the voltage monitoring circuit 321 stops the charging of the battery 230 and the battery 310 by the charging circuit 322. Thereby, charging of the battery 230 and the battery 310 is completed. Since the charging procedure is the same as that of the charging device 210 of the first embodiment, the description thereof is omitted. The remaining amount detection circuit 250 detects the voltage of the battery 230. When the voltage of the battery 230 reaches a voltage value at which the charging of the battery 230 and the battery 310 by the charging circuit 322 ends, that is, 4.2 V / cell, a charging end signal is transmitted to the output control circuit 260. When the output switching signal is received from the printer control unit 270, the output control circuit 260 opens the switch SW21 and then closes the switch SW11 based on the charging end signal.

  With the circuit configuration shown in FIG. 3 described above, it is possible to prevent the driving unit 290 from stopping during driving due to the power outage of the battery 230 with a simple structure. Further, the remaining amount detection circuit 250 transmits a Near End signal (detection signal) when the voltage of the battery 230 is reduced to a predetermined value, for example, 3 V / cell, before the power of the battery 230 is completely consumed. In addition, power remaining in the battery 310 can be supplied, and the battery 230 can be charged again. Further, when the power of the battery 230 is reduced to a predetermined value, for example, 3 V / cell, even when the driving unit 290 is being driven, that is, during printing, the remaining power is supplied to the battery 310 and printing is in progress. One page can be printed. Further, after the printing is completed, a predetermined necessary operation, that is, the drive unit 290 can be returned to a home position (not shown), and capping can be performed to shift to a stopped state. On the other hand, if the driving unit 290 is on standby, the power remaining in the battery 230 and the battery 310 is supplied to the booster circuit 280, and the predetermined necessary operation, that is, the driving unit 290 is returned to the home position (not shown) to perform capping. Thus, by shifting to the stop state, it is not necessary to operate the switches SW11 and SW21, and power consumption can be reduced.

  In addition, since the output control circuit 260 closes only one of the switches SW11 and SW21, even when the power of the battery 230 is reduced to a predetermined value, the power is reliably left in the battery 310 and the drive unit 290 is being driven. After printing one page being printed with the power remaining in the battery 310, the battery 310 can be further shifted to a stopped state. In addition, since the switch SW21 is closed after the switch SW11 is opened, the switches SW11 and SW21 are not closed at the same time, and the power remaining in the battery 310 is reliably supplied to the battery 230. Can be prevented.

  In addition, due to the diodes D2 and D3, the power of the battery 230 and the battery 310 is not supplied to the charging device 320 at the time of discharging, so that the power can be efficiently supplied to the booster circuit 280. Further, since the battery 230 and the battery 310 have substantially the same capacity, both the batteries 230 and 310 can be charged simultaneously from the charging device 320. In addition, since there is no need to switch between the battery 230 and the battery 310, the battery 230 and the battery 310 can be charged with a simple configuration. In addition, since the battery 230 and the battery 310 are secondary batteries, when power remains in the battery 230 and the battery 310, only the consumed power is charged, so that the remaining power can be effectively used.

  Next, a power supply apparatus 400 according to a third embodiment built in the ink jet printer 100 will be described with reference to FIG. The embodiments described below do not limit the invention according to the scope of claims, and all combinations of features described in the present embodiment are essential to the solution means of the invention. Is not limited. Furthermore, the same reference numerals are given to the same parts as those in the first embodiment and the second embodiment, and detailed description thereof will be omitted.

  FIG. 4 is a circuit diagram of a power supply apparatus 400 according to the third embodiment. The power supply device 400 shown in FIG. 4 includes a charging device 410, a current monitoring circuit 420, a battery 230, a battery 310, a remaining amount detection circuit 250, an output control circuit 260, a printer control unit 270, a booster circuit 280, a drive unit 290, and It is composed of switches SW11, SW21, SW31 and a diode D1. The battery 230, the battery 310, the remaining amount detection circuit 250, the output control circuit 260, the booster circuit 280, the printer control unit 270, the drive unit 290, and the diode D1 are the same as those in the second embodiment. On the other hand, the charging device 410 includes a voltage monitoring circuit 411, an open / close control circuit 412, and a charging circuit 413, and charges the battery 230 and the battery 310. The voltage monitoring circuit 411 monitors the voltage of the battery 230. The open / close control circuit 412 executes open / close control of the switch SW31. The charging circuit 413 charges the battery 230 and the battery 310 simultaneously. The current monitoring circuit 420 monitors the reverse current flowing from the battery 310 to the battery 230 through the switch SW31.

  Here, a circuit configuration of the power supply apparatus 400 will be schematically described. The charging device 410 is connected to the battery 230, the battery 310, and the current monitoring circuit 420 via the switch SW31. The booster circuit 280 is connected to the battery 230 via the switch SW11, the battery 310 via the diode D1 and the switch SW21, and the drive unit 290. A remaining amount detection circuit 250 is connected to branch from the path between the battery 230 and the switch SW11. The remaining amount detection circuit 250 is further connected to the output control circuit 260 and the printer control unit 270. The output control circuit 260 is connected to the switches SW11 and SW21, the remaining amount detection circuit 250, and the printer control unit 270. The current monitoring circuit 420 is branched and connected from both ends of the switch SW31. Further, it is connected to the charging device 410.

  Next, the operation at the time of charging the battery 230 in the power supply device 400 having the configuration shown in FIG. 4 will be described. Note that the operation at the time of discharging the battery 230 is the same as the operation of the second embodiment, and is omitted. First, the voltage monitoring circuit 411 monitors the voltage of the battery 230 and determines whether or not the voltage of the battery 230 is equal to or higher than a predetermined value. In the third embodiment, the predetermined value is set to 3 V / cell, for example. When the voltage of the battery 230 is equal to or higher than a predetermined value, the open / close control circuit 412 closes the switch SW31, and the charging circuit 413 charges the battery 230 and the battery 310 simultaneously. In the third embodiment, the switch SW31 is provided with a current limiting function in order to reduce the inrush current flowing from the battery 310 to the battery 230 by closing the switch SW31. On the other hand, when the voltage of the battery 230 is equal to or lower than the predetermined value, the open / close control circuit 412 closes the switch SW31, but the charging circuit 413 does not yet start the simultaneous charging of the battery 230 and the battery 310. Since there is a voltage difference between the battery 230 and the battery 310, a current flows from the battery 310 to the battery 230. At this time, the rush current flowing through the battery 230 can be suppressed to the battery allowable level by the current limiting function of the switch SW31.

  Thereafter, when there is no voltage difference between the battery 230 and the battery 310, no current flows from the battery 310 to the battery 230. Therefore, the current monitoring circuit 420 detects the current from the battery 310 to the battery 230, that is, the current flowing through the switch SW31. The current monitoring circuit 420 transmits a charging start signal to the charging circuit 413 when the current flowing through the switch SW31 becomes substantially zero. The charging circuit 413 starts simultaneous charging of the battery 230 and the battery 310 based on the charging start signal. Thereafter, when the voltage of the battery 230 becomes a predetermined value, for example, 4.2 V / cell, the voltage monitoring circuit 411 stops the charging of the battery 230 and the battery 310 by the charging circuit 413. Thereby, charging of the battery 230 and the battery 310 is completed. Since the charging procedure is the same as that of the charging device 210 of the first embodiment, the description thereof is omitted. The remaining amount detection circuit 250 detects the voltage of the battery 230. When the voltage of the battery 230 reaches a voltage value at which the charging of the battery 230 and the battery 310 by the charging circuit 413 ends, that is, 4.2 V / cell, a charging end signal is transmitted to the output control circuit 260. When the output switching signal is received from the printer control unit 270, the output control circuit 260 opens the switch SW21 and then closes the switch SW11 based on the charging end signal.

  With the circuit configuration shown in FIG. 4 described above, it is possible to prevent the driving unit 290 from stopping during driving due to power outage of the battery 230 with a simple structure. Further, the remaining amount detection circuit 250 transmits a Near End signal (detection signal) when the voltage of the battery 230 is reduced to a predetermined value, for example, 3 V / cell, before the power of the battery 230 is completely consumed. In addition, power remaining in the battery 310 can be supplied, and the battery 230 can be charged again. Further, when the power of the battery 230 is reduced to a predetermined value, for example, 3 V / cell, even when the driving unit 290 is being driven, that is, during printing, the remaining power is supplied to the battery 310 and printing is in progress. One page can be printed. Furthermore, a predetermined required operation, that is, the drive unit 290 can be returned to a home position (not shown), and capping can be performed to shift to a stopped state. On the other hand, if the driving unit 290 is on standby, the power remaining in the battery 230 and the battery 310 is supplied to the booster circuit 280, and the predetermined necessary operation, that is, the driving unit 290 is returned to the home position (not shown) to perform capping. Thus, by shifting to the stop state, it is not necessary to operate the switches SW11 and SW21, and power consumption can be reduced.

  In addition, since the output control circuit 260 closes only one of the switches SW11 and SW21, even when the power of the battery 230 is reduced to a predetermined value, the power is reliably left in the battery 310 and the drive unit 290 is being driven. After printing one page being printed with the power remaining in the battery 310, the battery 310 can be further shifted to a stopped state. Further, since the switch SW21 is closed after the switch SW11 is opened, the switches SW11 and SW21 are not closed at the same time, and the power remaining in the battery 310 is reliably supplied to the battery 230. Can be prevented.

  Further, when the voltage of the battery 230 is a predetermined value, for example, 3 V / cell or less, the potential difference between the battery 230 and the battery 310 is large, and the battery 230 and the battery 310 cannot be charged simultaneously from the charging circuit 413, so the switch SW31 is closed. Thus, current flows from the battery 310 to the battery 230, and the potential difference between the battery 230 and the battery 310 can be made substantially zero. Therefore, by monitoring the current flowing through the switch SW31 with the current monitoring circuit 420, the charging circuit 413 can simultaneously charge the battery 230 and the battery 310 when the current becomes substantially zero.

  On the other hand, when the voltage of the battery 230 is greater than or equal to a predetermined value, the potential difference between the battery 230 and the battery 310 is small, so the charging circuit 413 monitors the battery 230 and the battery 310 without monitoring the current flowing through the switch SW31 by the current monitoring circuit 420. Can be charged simultaneously.

Next, a power supply system including the ink jet printer 100, the PC 500, and the USB cable 600 will be described with reference to FIG. The embodiments described below do not limit the invention according to the scope of claims, and all combinations of features described in the present embodiment are essential to the solution means of the invention. Is not limited. Furthermore, the same reference numerals are given to the same parts as those in the first to third embodiments, and detailed description thereof will be omitted.
FIG. 5 is a simplified diagram of a power supply system according to the fourth to sixth embodiments. 5A is a power supply system according to the fourth embodiment, FIG. 5B is a power supply system according to the fifth embodiment, and FIG. 5C is a power supply system according to the sixth embodiment. It is.

  First, a power supply system according to the fourth embodiment shown in FIG. The power supply system according to the fourth embodiment shown in FIG. 5A includes an inkjet printer 100, a PC 500, and a USB cable 600. The PC 500 is provided with a battery 510 that is a power source for operating the PC 500. Further, the inkjet printer 100 is provided with a circuit in which the switch SW14 and the auxiliary battery 240 are deleted from the power supply apparatus 200 according to the first embodiment. The battery 510 in the PC 500 and the booster circuit 280 in the ink jet printer 100 are directly connected by the USB cable 600. That is, the auxiliary battery 240 of the power supply apparatus 200 according to the first embodiment is replaced with the battery 510 in the PC 500. The USB cable 600 can transmit power of, for example, about 5 V and 500 mA, and therefore remains in the battery 510 built in the PC 500 even when the power of the battery 230 in the inkjet printer 100 is reduced to a predetermined value. By supplying power to the booster circuit 280, it is possible to prevent the driving unit 290 from stopping during driving with a simple configuration.

  Next, a power supply system according to a fifth embodiment shown in FIG. The power supply system according to the fifth embodiment shown in FIG. 5B includes the ink jet printer 100, the PC 500, and the USB cable 600, similarly to the power supply system according to the fourth embodiment. The PC 500 is provided with a battery 510 that is a power source for operating the PC 500. The ink jet printer 100 is provided with the power supply device 200 according to the first embodiment. The battery 510 in the PC 500 is connected to the charging device 210 via the USB cable 600. For example, the USB cable 600 can transmit electric power of about 5 V and 500 mA, so that the battery 230 and the auxiliary battery 240 can be charged via the charging device 210. As a result, even when the power of the battery 230 in the ink jet printer 100 is reduced to a predetermined value, the power remaining in the auxiliary battery 240 is supplied to the booster circuit 280 so that the driving unit 290 stops during driving. This can be prevented with a simple configuration. Furthermore, the battery 230 and the auxiliary battery 240 in the ink jet printer 100 can be charged from the battery 510 in the PC 500. Therefore, the drive unit 290 can be driven again with the power of the battery 510 in the PC 500.

  Next, a power supply system according to a sixth embodiment shown in FIG. The power supply system according to the sixth embodiment shown in FIG. 5C is configured by the ink jet printer 100, the PC 500, and the USB cable 600, similarly to the power supply systems according to the fourth and fifth embodiments. Yes. The PC 500 is provided with a battery 510 that is a power source for operating the PC 500. The ink jet printer 100 is provided with a power supply device 300 according to the second embodiment or a power supply device 400 according to the third embodiment. The battery 510 in the PC 500 is connected to the charging device 320 or 410 via the USB cable 600. The USB cable 600 can transmit power of, for example, about 5 V and 500 mA, so that the battery 230 and the battery 310 can be charged via the charging device 320 or 410. Thus, even when the power of the battery 230 in the ink jet printer 100 is reduced to a predetermined value, the power remaining in the battery 310 is supplied to the booster circuit 280, so that the driving unit 290 can be easily stopped during driving. Can be prevented with a simple configuration. Further, the battery 230 and the battery 310 in the ink jet printer 100 can be charged from the battery 510 in the PC 500. Therefore, the drive unit 290 can be driven again with the power of the battery 510 in the PC 500.

  As described above, according to the power supply apparatus 200 according to the first embodiment, the battery 230 that supplies power to the drive unit 290 that is a drive unit, and the auxiliary that supplies at least predetermined power to the drive unit 290. A battery 240, a remaining amount detection circuit 250 that is a detection unit that detects the remaining amount of the battery 230, and switches SW11 and SW12 that are switching units that switch power supply to the driving unit 290 between the battery 230 and the auxiliary battery 240; And an output control circuit 260 which is a control means for controlling the switches SW11 and SW12. Further, the output control circuit 260 operates the switches SW11 and SW12 based on the detection signal transmitted from the remaining amount detection circuit 250.

  Thereby, even if the power of the battery 230 is cut off, the switches SW11 and SW12 are operated to supply the power remaining in the auxiliary battery 240 to the drive unit 290, so that the drive unit 290 can be easily stopped during driving. Can be prevented with a simple configuration.

  In addition, according to the power supply device 200 according to the first embodiment, the battery 230 that supplies power to the drive unit 290, the auxiliary battery 240 that supplies at least predetermined power to the drive unit 290, and the battery 230 The remaining amount detection circuit 250 that detects the remaining amount, the booster circuit 280 that is a booster that boosts the voltage supplied from the battery 230 or the auxiliary battery 240 and supplies the boosted voltage to the driving unit 290, and the power supply to the booster circuit 280. Switches SW11 and SW12 that are output switching means for switching between the battery 230 and the auxiliary battery 240, an output control circuit 260 that controls the switches SW11 and SW12, and a printer control unit 270 that is a drive control means that controls the drive unit 290; It is equipped with. Further, the remaining amount detection circuit 250 transmits a detection signal to the printer control unit 270 when the power of the battery 230 decreases to a predetermined value, and the printer control unit 270 operates the drive unit 290 based on the detection signal. When the state is detected and the driving unit 290 is driving, an output switching signal is transmitted, and the output control circuit 260 operates the switches SW11 and SW12 based on the output switching signal, and instead of the battery 230, The power of the auxiliary battery 240 is supplied to the booster circuit 280.

  As a result, when the power of the battery 230 is reduced to a predetermined value, if the drive unit 290 is being driven, the power of the auxiliary battery 240 can be supplied to the booster circuit 280 to terminate the above operation. Therefore, it is possible to prevent the driving unit 290 from stopping during driving with a simple configuration.

  Further, according to the power supply apparatus 200 according to the first embodiment, the printer control unit 270 does not transmit an output switching signal when the driving unit 290 is on standby, and the power of the battery 230 is boosted. To supply. As a result, when the power of the battery 230 is reduced to a predetermined value, if the drive unit 290 is in a standby state, the power remaining in the battery 230 is supplied to the booster circuit 280 so that the drive unit 290 is stopped. it can. Therefore, it is not necessary to operate the switches SW11 and SW12, and power consumption can be reduced.

  Further, according to the power supply apparatus 200 according to the first embodiment, the battery 230 and the auxiliary battery 240 are secondary batteries that can be charged and discharged. In view of charging only the generated power, the power remaining in the battery 230 and the auxiliary battery 240 can be effectively used.

  In addition, according to the power supply device 200 according to the first embodiment, the battery 230 and the auxiliary battery are further charged with the charging device 210 as charging means for charging the battery 230 and the auxiliary battery 240, and the power supply from the charging device 210. The switches SW13 and SW14 serving as input switching means for switching between 240 and the input control circuit 220 serving as input control means for controlling the switches SW13 and SW14 are provided. Further, the input control circuit 220 operates the switches SW13 and SW14 to charge either the battery 230 or the auxiliary battery 240, and then operates the switches SW13 and SW14 again to charge the other battery. ing.

  Thereby, even when the capacities of the battery 230 and the auxiliary battery 240 are different, charging can be performed. Therefore, the capacity of the auxiliary battery 240 can be made smaller than the capacity of the battery 230.

  Further, according to the power supply apparatus 300 according to the second embodiment, the battery 230 that supplies power to the drive unit 290, the battery 310 that supplies at least predetermined power to the drive unit 290, and the remaining battery 230 The remaining amount detection circuit 250 that detects the amount, the voltage supplied from the battery 230 and the battery 310 are boosted, the booster circuit 280 that supplies the voltage to the drive unit 290, and the power supply path from the battery 230 to the booster circuit 280 are opened and closed. A switch SW11 as a first opening / closing means, a diode D1 as a voltage drop element for dropping a voltage supplied from the battery 310 to the booster circuit 280, a switch SW21 as a second opening / closing means for short-circuiting the diode D1, and a switch An output control circuit 260 for controlling SW11 and SW21 and a printer control unit 270 for controlling the drive unit 290 are provided.Further, the remaining amount detection circuit 250 transmits a detection signal to the printer control unit 270 when the power of the battery 230 decreases to a predetermined value, and the printer control unit 270 operates the drive unit 290 based on the detection signal. When the state is detected and the driving unit 290 is being driven, an output switching signal is transmitted. Based on the output switching signal, the output control circuit 260 opens the switch SW11 and then closes the switch SW21. .

  Thereby, when the power of the battery 230 is reduced to a predetermined value, if the drive unit 290 is being driven, the switch SW21 is closed and the diode D1 is short-circuited, whereby the power remaining in the battery 310 is supplied to the booster circuit 280. The above operation can be completed by supplying. Therefore, it is possible to prevent the driving unit 290 from stopping during driving with a simple configuration.

  Further, according to the power supply device 300 according to the second embodiment, the printer control unit 270 does not transmit an output switching signal when the driving unit 290 is on standby, and the power of the battery 230 and the battery 310 is not transmitted. The voltage is supplied to the booster circuit 280. As a result, when the power of the battery 230 is reduced to a predetermined value, if the drive unit 290 is on standby, the power of the battery 230 and the battery 310 is supplied to the booster circuit 280 to put the drive unit 290 in a stopped state. Can do. Therefore, it is not necessary to close the switch SW21 after the switch SW11 is opened, and power consumption can be reduced.

  Further, according to the power supply device 300 according to the second embodiment, the battery 230 and the battery 310 are chargeable / dischargeable secondary batteries. Therefore, when power remains in the battery 230 and the battery 310, the consumed power Therefore, the power remaining in the battery 230 and the battery 310 can be effectively used.

  Further, according to the power supply device 300 according to the second embodiment, the battery 230 and the charging device 320 for charging the battery 310, and the reverse current flowing from the battery 230 and the battery 310 to the charging device 320 during discharging are further prevented. And diodes D2 and D3, which are reverse current blocking means. The charging device 320 includes a voltage monitoring circuit 321 that is a voltage monitoring unit that monitors the voltage of the diode D2 on the battery 230 side, and a charging circuit 322 that charges the battery 230 and the battery 310 at the same time. When the voltage on the side reaches a predetermined value, charging by the charging circuit 322 is stopped.

  Thereby, since the electric power of the battery 230 and the battery 310 is not supplied to the charging device 320 by the diodes D2 and D3 at the time of discharging, the electric power can be efficiently supplied to the booster circuit 280.

  The power supply device 400 according to the third embodiment further includes the battery 230 and the charging device 410 that charges the battery 310, and the third opening / closing means that opens and closes the path from the battery 310 to the battery 230. A switch SW31 and a current monitoring circuit 420 which is current monitoring means for monitoring the current flowing through the switch SW31 are provided. Further, the charging device 410 simultaneously charges the battery 230 and the battery 310, the voltage monitoring circuit 411 that is a voltage monitoring unit that monitors the voltage of the battery 230, the opening / closing control circuit 412 that is an opening / closing control unit that opens and closes the switch SW31. A charging circuit 413 is provided, and the voltage monitoring circuit 411 causes the switching control circuit 412 to close the switch SW31 when the voltage of the battery 230 falls below a predetermined value, and the current monitoring circuit 420 is closed by the switching control circuit 412. The current flowing through the switch SW31 is monitored, and when the current becomes substantially zero, the charging circuit 413 charges both the batteries 230 and 310.

  Thereby, when the voltage of the battery 230 is equal to or lower than a predetermined value, the potential difference between the battery 230 and the battery 310 is large, and the battery 230 and the battery 310 cannot be charged simultaneously from the charging circuit 413. Thus, the switch SW31 is closed, The potential difference between the battery 230 and the battery 310 can be made substantially zero. Therefore, the current flowing through the switch SW31 is monitored, and when the current becomes substantially zero, it is determined that the potential difference between the battery 230 and the battery 310 has become substantially zero, and simultaneous charging from the charging circuit 413 can be performed.

  In addition, according to the power supply system of the fourth embodiment, the battery 230 that supplies power to the drive unit 290, the remaining amount detection circuit 250 that detects the remaining amount of the battery 230, and the printer that controls the drive unit 290. An inkjet printer 100 that is a recording device including a control unit 270; a PC 500 that is an information processing terminal including at least a battery 510 that supplies predetermined power; and a signal and power for connecting the inkjet printer 100 and the PC 500. A USB cable 600 that is a cable that can be transmitted. Further, the ink jet printer 100 further boosts the voltage supplied from the battery 230 or the battery 510 and supplies the booster circuit 280 to the driving unit 290, and supplies power to the booster circuit 280 between the battery 230 and the battery 510. The switches SW11 and SW12 that are switched in step S3 and the output control circuit 260 that controls the switches SW11 and SW12. The remaining amount detection circuit 250 detects when the power of the battery 230 decreases to a predetermined value. The printer control unit 270 detects the operating state of the drive unit 290 based on the detection signal, and does not transmit an output switching signal when the drive unit 290 is on standby, and the drive unit 290 is driving. In this case, the output switching signal is transmitted, and based on the output switching signal, the output control circuit 260 operates the output switching means to Instead of providing power for battery 510 to the booster circuit 280.

  Thereby, even when the power of the battery 230 in the printer 100 is reduced to a predetermined value, the switches SW11 and SW12 are operated to supply the power remaining in the battery 510 built in the PC 500 to the booster circuit 280. It is possible to prevent the driving unit 290 from stopping during driving with a simple configuration.

  Further, according to the power supply system of the fifth embodiment, the battery 230 that supplies power to the drive unit 290, the auxiliary battery 240 that supplies at least predetermined power to the drive unit 290, and the remaining battery 230 are provided. The remaining amount detection circuit 250 that detects the amount, the voltage supplied from the battery 230 or the auxiliary battery 240 is boosted, the booster circuit 280 that supplies the voltage to the driving unit 290, and the power supply to the booster circuit 280 is supplied to the battery 230 and the auxiliary battery. 240, switches SW <b> 11 and SW <b> 12 that switch between them, an output control circuit 260 that controls the switches SW <b> 11 and SW <b> 12, and a printer control unit 270 that controls the drive unit 290. Is detected to a predetermined value, a detection signal is transmitted to the printer control unit 270, and the printer control unit 270 The operating state of the drive unit 290 is detected, and the output switching signal is not transmitted when the driving unit 290 is in standby, the output switching signal is transmitted when the driving unit 290 is driving, and based on the output switching signal The output control circuit 260 operates the switches SW11 and SW12 to supply the power of the auxiliary battery 240 to the booster circuit 280 instead of the battery 230, the PC 500 including the battery 510, and the ink jet printer 100. And a USB cable 600 for connecting the PC 500. Further, the battery 230 and the auxiliary battery 240 are charged from the battery 510 via the USB cable 600.

  As a result, even when the power of the battery 230 in the ink jet printer 100 drops to a predetermined value, the switches SW11 and SW12 are operated to supply the power remaining in the auxiliary battery 240 in the ink jet printer 100 to the booster circuit 280. Thus, it is possible to prevent the driving unit 290 from stopping during driving with a simple configuration. Further, the driving unit 290 can be driven again by charging the battery 230 and the auxiliary battery 240 in the ink jet printer 100 from the battery 510 in the PC 500.

  Further, according to the power supply system of the sixth embodiment, the battery 230 that supplies power to the drive unit 290, the battery 310 that supplies at least predetermined power to the drive unit 290, and the remaining amount of the battery 230 The remaining amount detection circuit 250 for detecting the voltage, the booster circuit 280 that boosts the voltage supplied from the battery 230 and the battery 310 and supplies the booster 290, and the switch that opens and closes the power supply path from the battery 230 to the booster circuit 280 SW11, diode D1 for dropping the voltage supplied from battery 310 to booster circuit 280, switch SW21 for short-circuiting diode D1, output control circuit 260 for controlling switch SW11 and switch SW21, and printer for controlling drive unit 290 And the remaining amount detection circuit 250 reduces the power of the battery 230 to a predetermined value. In this case, a detection signal is transmitted to the printer control unit 270, and the printer control unit 270 detects an operation state of the drive unit 290 based on the detection signal, and transmits an output switching signal when the drive unit 290 is on standby. In addition, when the drive unit 290 is being driven, an output switching signal is transmitted. Based on the output switching signal, the output control circuit 260 opens the switch SW11 and then closes the switch SW21. A PC 500 including a battery 510 and a USB cable 600 for connecting the inkjet printer 100 and the PC 500 are provided. Further, the battery 230 and the battery 310 are charged from the battery 510 via the USB cable 600.

  As a result, even when the power of the battery 230 in the ink jet printer 100 is reduced to a predetermined value, the switch SW11 is opened and then the switch SW21 is closed so that the power remaining in the battery 310 in the ink jet printer 100 is reduced. By supplying the voltage to the booster circuit 280, the driving unit 290 can be prevented from being stopped during driving with a simple configuration. Furthermore, the driving unit 290 can be driven again by charging the battery 230 and the battery 310 in the ink jet printer 100 from the battery 510 in the PC 500.

  The embodiment described above is an example of the implementation of the present invention, and the scope of the present invention is not limited thereto, and other various embodiments are within the scope described in the claims. It is applicable to. For example, in the power supply apparatus 200 according to the first embodiment, the printer control unit 270 detects the operation state of the drive unit 290 when a Near End signal (detection signal) is received, and the operation state of the drive unit 290 is driven. Although it is determined which battery is used depending on whether or not it is in a state, the present invention is not particularly limited to this, and the operation state of the drive unit 290 may not be detected. In this case, the remaining amount detection circuit 250 transmits a Near End signal (detection signal) to the output control circuit 260, and the output control circuit 260 opens the switch SW11 based on the Near End signal (detection signal), and then the switch 12 By closing the, the drive unit 290 can be shifted to the stopped state by the power of the auxiliary battery 240 regardless of the operation state of the drive unit 290.

  Further, in the power supply device 200 of the first embodiment, when the power of the battery 230 is reduced to a predetermined value, the power remaining in the auxiliary battery 240 is boosted if the drive unit 290 is driving, that is, printing. After being supplied to the circuit 280 and printing one page being printed, the state is shifted to the stop state. However, the present invention is not limited to this, and if there is power remaining in the auxiliary battery 240, the stop state is entered. You can print any number of pages before migrating.

  Further, in the power supply apparatus 200 of the first embodiment, the switch SW13, the switch SW14, and the input control circuit 220 are provided, and the input control circuit 220 performs the control to close only one of the switch SW13 or the switch SW14, thereby charging. Although the circuit configuration is such that only one of the battery 210 and the auxiliary battery 240 can be charged from the device 210, the present invention is not particularly limited to this, and the batteries 230 and the auxiliary battery 240 have substantially the same capacity and are charged simultaneously. Also good.

  In the power supply device 300 of the second embodiment, the diode D1 is used as the voltage drop element. However, the present invention is not limited to this, and the voltage can be dropped, and the current is shown in FIG. Any element that can flow only in the direction of the discharge current shown is applicable. Similarly, a diode D2 is disposed between the charging device 320 and the battery 230, and a diode D3 is disposed between the charging device 320 and the battery 310. However, the present invention is not limited to this, and the charging shown in FIG. Any element that can flow only in the direction of current is applicable.

  Also in the power supply apparatus 300 of the second embodiment, the printer control unit 270 detects the operation state of the drive unit 290 when the Near End signal (detection signal) is received, and the operation state of the drive unit 290 is driven. Although it is determined which battery is used depending on whether or not it is in a state, the present invention is not particularly limited to this, and the operation state of the drive unit 290 may not be detected. In this case, the remaining amount detection circuit 250 transmits a Near End signal (detection signal) to the output control circuit 260, and the output control circuit 260 opens the switch SW11 based on the Near End signal (detection signal), and then the switch 12 By closing the, the drive unit 290 can be shifted to the stopped state with the electric power remaining in the battery 310 regardless of the operation state of the drive unit 290.

  Also in the power supply apparatus 400 of the third embodiment, the printer control unit 270 detects the operation state of the drive unit 290 when the Near End signal (detection signal) is received, and the operation state of the drive unit 290 is driven. Although it is determined which battery is used depending on whether or not it is in a state, the present invention is not particularly limited to this, and the operation state of the drive unit 290 may not be detected. In this case, the remaining amount detection circuit 250 transmits a Near End signal (detection signal) to the output control circuit 260, and the output control circuit 260 opens the switch SW11 based on the Near End signal (detection signal), and then the switch 12 By closing the, the drive unit 290 can be shifted to the stopped state with the electric power remaining in the battery 310 regardless of the operation state of the drive unit 290. In this way, since the potential difference between the battery 230 and the battery 310 is reduced, the switch SW31 is closed, and a current is passed from the battery 310 to the battery 230, so that the potential difference between the battery 230 and the battery 310 becomes substantially zero. Therefore, the current monitoring circuit 420 for monitoring the current flowing through the switch SW31 is not necessary, and the entire circuit configuration can be simplified.

  Further, in the power supply device 400 of the third embodiment, the switch SW31 has a current limiting function. However, the present invention is not limited to this, and the switch SW31 may be applied without having a current limiting function. Is possible. In this case, by reviewing the setting of the diode D1, the potential difference between the battery 230 and the battery 310 is reduced, and the inrush current flowing from the battery 310 to the battery 230 can be within the battery allowable level.

  Further, in the power supply apparatus 400 of the third embodiment, the diode D1 is used as the voltage drop element. However, the voltage drop element is not limited to this, and the voltage can be dropped, and the current is shown in FIG. Any element that can flow only in the direction of the discharge current shown is applicable.

  Further, in the power supply devices 300 and 400 of the second and third embodiments, when the power of the battery 230 is reduced to a predetermined value, the drive unit 290 is driven, that is, remains in the battery 310 if it is printing. Power is supplied to the booster circuit 280 and one page being printed is printed and then shifted to the stop state. However, the present invention is not limited to this, and if there is power remaining in the battery 310, Any number of pages may be printed before shifting to the stop state.

  In the power supply systems of the fourth to sixth embodiments, the PC 500 and the ink jet printer 100 are connected by the USB cable 600. However, the present invention is not particularly limited to this, as long as not only signals but also power can be transmitted. Any other cable is applicable.

  In the power supply systems of the fourth to sixth embodiments, the PC 500 is used as the information processing terminal. However, the present invention is not particularly limited to this, and any information processing terminal including the battery 510 may be used. Any terminal can be applied.

  Any electronic device having a power supply device that supplies power for driving the drive means from a battery can be applied to, for example, a facsimile machine, a copy machine, and the like.

1 is a perspective view of an external configuration of an ink jet printer that is one of recording apparatuses according to an embodiment of the present invention when viewed from the front side. 1 is a circuit diagram of a power supply device according to a first embodiment. It is a circuit diagram of the electric power supply apparatus which concerns on 2nd Embodiment. It is a circuit diagram of the electric power supply apparatus which concerns on 3rd Embodiment. It is a simplified diagram of a power supply system according to fourth to sixth embodiments.

Explanation of symbols

100 Inkjet printer, 110 housing, 111 lower case,
112 upper case, 113 paper discharge port, 114 insertion / extraction port, 115 paper supply port,
116 paper feed door, 117 paper holder, 118 recess,
200 power supply device, 210 charging device, 220 input control circuit, 230 battery,
240 auxiliary battery, 250 remaining amount detection circuit, 260 output control circuit,
270 Printer control unit, 280 booster circuit, 290 drive unit,
300 power supply device, 310 battery, 320 charging device, 321 voltage monitoring circuit,
322 charging circuit,
400 power supply device, 410 charging device, 411 voltage monitoring circuit,
412 switching control circuit, 413 charging circuit, 420 current monitoring circuit,
500 PC, 510 battery, 600 USB cable,
SW11, SW12, SW13, SW14, SW21, SW31, switch,
D1, D2, D3 diodes,

Claims (15)

A first battery for supplying power to the driving means;
A second battery for supplying at least predetermined power to the driving means;
Detecting means for detecting a remaining amount of the first battery;
Switching means for switching power supply to the driving means between the first battery and the second battery;
A power supply apparatus comprising: control means for controlling the switching means;
The control means operates the switching means based on a detection signal transmitted from the detection means. A first battery for supplying power to the driving means;
A second battery for supplying at least predetermined power to the driving means;
Detecting means for detecting a remaining amount of the first battery;
Boosting means for boosting the voltage supplied from the first battery or the second battery and supplying the boosted voltage to the driving means;
Output switching means for switching power supply to the boosting means between the first battery and the second battery;
Output control means for controlling the output switching means;
A power supply device comprising: a drive control means for controlling the drive means;
The detection means transmits a detection signal to the drive control means when the power of the first battery decreases to a predetermined value,
The drive control means detects an operating state of the drive means based on the detection signal, and transmits an output switching signal when the drive means is being driven,
The output control means operates the output switching means based on the output switching signal, and supplies the power of the second battery to the boosting means instead of the first battery. Power supply device. The said drive control means does not transmit the said output switch signal, when the said drive means is standby, The electric power of a said 1st battery is supplied to the said pressure | voltage rise means, The said pressure | voltage rise means is characterized by the above-mentioned. Power supply equipment. The power supply apparatus according to claim 2 or 3, wherein the first battery and the second battery are chargeable / dischargeable secondary batteries. And charging means for charging the first battery and the second battery;
Input switching means for switching power supply from the charging means between the first battery and the second battery;
The power supply apparatus according to claim 4, further comprising: an input control unit that controls the input switching unit.
The input control means operates the input switching means to charge either the first battery or the second battery,
The power supply apparatus, wherein the input switching unit is operated again to charge the other of the batteries. A first battery for supplying power to the driving means;
A second battery for supplying at least predetermined power to the driving means;
Detecting means for detecting a remaining amount of the first battery;
Boosting means for boosting a voltage supplied from the first battery and the second battery and supplying the boosted voltage to the driving means;
First opening / closing means for opening / closing a power supply path from the first battery to the boosting means;
A voltage drop element that drops a voltage supplied from the second battery to the booster;
A second opening / closing means for short-circuiting the voltage drop element;
Output control means for controlling the first opening and closing means and the second opening and closing means;
A power supply device comprising: a drive control means for controlling the drive means;
The detection means transmits a detection signal to the drive control means when the power of the first battery decreases to a predetermined value,
The drive control means detects an operating state of the drive means based on the detection signal, and transmits an output switching signal when the drive means is being driven,
The output control means closes the second opening / closing means after opening the first opening / closing means based on the output switching signal. The drive control means does not transmit the output switching signal when the drive means is in a standby state, and causes the boosting means to supply power of the first battery and the second battery. The power supply device according to claim 6. The power supply apparatus according to claim 6 or 7, wherein the first battery and the second battery are chargeable / dischargeable secondary batteries. And charging means for charging the first battery and the second battery;
The power supply device according to claim 8, further comprising reverse current blocking means for blocking reverse current flowing from the first battery and the second battery to the charging means during discharging.
The charging means includes voltage monitoring means for monitoring the voltage on the first battery side of the reverse current blocking means, and a charging circuit for simultaneously charging the first battery and the second battery,
The voltage monitoring unit stops charging by the charging circuit when the voltage on the first battery side reaches a predetermined value. And charging means for charging the first battery and the second battery;
Third opening / closing means for opening / closing a path from the second battery to the first battery;
The power supply device according to claim 8, further comprising a current monitoring unit that monitors a current flowing through the third opening / closing unit.
The charging means includes voltage monitoring means for monitoring the voltage of the first battery, opening / closing control means for opening / closing the third opening / closing means, and charging for simultaneously charging the first battery and the second battery. With a circuit,
The voltage monitoring means causes the opening / closing control means to close the third opening / closing means when the voltage of the first battery becomes a predetermined value or less,
The current monitoring means monitors the current flowing through the third opening / closing means closed by the opening / closing control means, and causes the charging circuit to charge both the batteries when the current becomes substantially zero. A power supply device characterized by that. An electronic apparatus comprising the power supply device according to claim 1. A recording apparatus for recording on a recording medium, comprising the power supply apparatus according to claim 1. A first battery for supplying power to the driving means;
Detecting means for detecting a remaining amount of the first battery;
A drive control means for controlling the drive means, and a recording apparatus comprising:
An information processing terminal including at least a second battery for supplying predetermined power;
In a power supply system comprising a cable for transmitting a signal and power for connecting the recording device and the information processing terminal,
The recording apparatus further includes a boosting unit that boosts the voltage supplied from the first battery or the second battery and supplies the boosted voltage to the driving unit.
Output switching means for switching power supply to the boosting means between the first battery and the second battery;
Output control means for controlling the output switching means,
The detection means transmits a detection signal to the drive control means when the power of the first battery decreases to a predetermined value,
The drive control means detects an operation state of the drive means based on the detection signal, does not transmit the output switching signal when the drive means is on standby, and when the drive means is driving Send output switching signal,
Based on the output switching signal, the output control means operates the output switching means to supply the power of the second battery to the boosting means instead of the first battery. Power supply system. A first battery for supplying power to the driving means;
A second battery for supplying at least predetermined power to the driving means;
Detecting means for detecting a remaining amount of the first battery;
Boosting means for boosting the voltage supplied from the first battery or the second battery and supplying the boosted voltage to the driving means;
Output switching means for switching power supply to the boosting means between the first battery and the second battery;
Output control means for controlling the output switching means;
Drive control means for controlling the drive means,
The detection means transmits a detection signal to the drive control means when the power of the first battery decreases to a predetermined value,
The drive control means detects an operating state of the drive means based on the detection signal, does not transmit the output switching signal when the drive means is in standby, and when the drive means is driving Send output switching signal,
Based on the output switching signal, the output control means operates the output switching means to supply the power of the second battery to the boosting means instead of the first battery; and
An information processing terminal comprising a third battery;
In a power supply system comprising: a signal for connecting the recording device and the information processing terminal and a cable capable of transmitting power;
A power supply system, wherein the first battery and the second battery are charged from the third battery via a cable capable of transmitting the signal and power. A first battery for supplying power to the driving means;
A second battery for supplying at least predetermined power to the driving means;
Detecting means for detecting a remaining amount of the first battery;
Boosting means for boosting a voltage supplied from the first battery and the second battery and supplying the boosted voltage to the driving means;
First opening / closing means for opening / closing a power supply path from the first battery to the boosting means;
A voltage drop element that drops a voltage supplied from the second battery to the booster;
A second opening / closing means for short-circuiting the voltage drop element;
Output control means for controlling the first opening and closing means and the second opening and closing means;
Drive control means for controlling the drive means,
The detection means transmits a detection signal to the drive control means when the power of the first battery decreases to a predetermined value;
The drive control means detects an operating state of the drive means based on the detection signal, and does not transmit an output switching signal when the drive means is on standby, and when the drive means is driven, Send output switching signal,
Based on the output switching signal, the output control means opens the first opening / closing means, and then closes the second opening / closing means;
An information processing terminal comprising a third battery;
In a power supply system comprising: a signal for connecting the recording device and the information processing terminal and a cable capable of transmitting power;
A power supply system, wherein the first battery and the second battery are charged from the third battery via a cable capable of transmitting the signal and power.

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