JP2023064040A - printing system - Google Patents

Abstract

To provide a printing system which can suppress increase in the size.SOLUTION: A printing system can be driven by a plurality of power sources. A head 10 executes printing on a medium. A conveyance motor 9 generates power for conveying the medium. A battery mounting part 34 is connectable to a battery 29. An AC adapter jack 32 is connectable to an AC adapter 30. A power supply circuit 100 supplies first power that is power of the battery 29 connected to the battery mounting part 34, and second power that is power of the AC adapter 30 connected to the AC adapter jack 32, to the head 10 and the conveyance motor 9. When the battery 29 is connected to the battery mounting part 34 and the AC adapter 30 is connected to the AC adapter jack 32, the power supply circuit 100 supplies at least a part of the first power to the head 10, and supplies at least a part of the second power to the conveyance motor 9.SELECTED DRAWING: Figure 5

Description

The present invention relates to printing systems.

The printing apparatus of Patent Document 1 is driven by power supply from a battery or an external power supply device. When both the battery and the external power supply device are connected, the printing device is driven by power supplied from the external power supply device. The printer is driven by power supplied from the battery when both the battery and the external power supply device are connected and printing is executed.

Japanese Unexamined Patent Application Publication No. 2017-056700

In the above printing apparatus, when a large amount of electric power is required to speed up printing, it is necessary to increase the size of the power supply such as a battery. Therefore, there is a possibility that the printing apparatus will become large.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printing system capable of suppressing an increase in size.

A printing system according to a first aspect of the present invention is a printing system that can be driven by a plurality of power sources, and includes a head that performs printing on a medium, a transport motor that generates power for transporting the medium, A first connection section to which a first power supply can be connected, a second connection section to which a second power supply can be connected, and a power supply circuit for supplying power to the head and the transport motor, wherein the power supply circuit is , when the first power supply is connected to the first connection part and the second power supply is connected to the second connection part, at least part of the first power that is the power of the first power supply is and at least a part of the second power supplied to the head and the power of the second power supply is supplied to the transport motor.

The printing system supplies first power of the first power supply to the head and second power to the transport motor. Therefore, power supplied from a plurality of power sources can be used efficiently. Therefore, the printing system does not need to increase the size of each power supply to drive the head and the transport motor. Therefore, the printing system can be suppressed from becoming large.

In the invention according to the first aspect of the present invention, the power supply circuit supplies at least part of the first power to the head and supplies at least part of the second power to the transport motor. 0], may be done at the same time. By simultaneously supplying the first power to the head and the second power to the transport motor, the printing system can efficiently use each power.

In the invention according to the first aspect of the present invention, when the power supply circuit has the first power source connected to the first connection portion and the second power source connected to the second connection portion, the At least a portion of the first power may be supplied to a first portion of the head and the transport motor, and at least a portion of the second power may be supplied to a second portion of the head different from the first portion. . The printing system supplies first power from the first power supply to the first portion of the head and second power from the second power supply to the second portion of the head and the transport motor. This allows the printing system to efficiently use multiple power sources without increasing the size.

In the invention according to the first aspect of the present invention, when the first power supply is connected to the first connection portion and the second power supply is not connected to the second connection portion, the power supply circuit At least a portion of one electric power may be supplied to the head and the transport motor. The printing system can drive the head and the transport motor with the first power only from the first power supply.

In the invention according to the first aspect of the present invention, when the second power supply is connected to the second connection portion and the first power supply is not connected to the first connection portion, the power supply circuit At least part of the two powers may be supplied to the head and the transport motor. The printing system can drive the head and the transport motor with the second power only from the second power supply.

In the invention according to the first aspect of the present invention, the first power may be greater than the second power. In a printing system, the head may require more power than the transport motor. In this case, the printing system supplies the head with first power from the first power supply, which has higher power than the second power supply. Therefore, the printing system can efficiently supply power.

In the invention according to the first aspect of the present invention, the first power source may be a battery, and the second power source may be an AC adapter. The printing system can efficiently use the power of the battery and AC adapter without increasing their size.

In the invention according to the first aspect of the present invention, a third connection section to which a third power supply can be connected is provided, and the power supply circuit has the first power supply connected to the first connection section and the third connection. When the third power source is connected to the unit, at least a portion of the first power is supplied to the head, and at least a portion of the third power, which is the power of the third power source, is supplied to the transport motor. may be supplied. The printing system can connect a third power supply in addition to the first power supply and the second power supply. The printing system can efficiently use each power of the first power supply to the third power supply.

In the invention according to the first aspect of the present invention, the power supply circuit has the first connection portion connected to the first power supply, the second connection portion connected to the second power supply, and the third connection When the third power supply is connected to the unit, at least part of the first power may be supplied to the head, and at least part of the second power may be supplied to the transport motor. When the first to third power supplies are connected, the printing system preferentially uses the first power supply and the second power supply. The printing system does not spend time selecting power supplies. Therefore, the printing system can be made faster.

In the invention according to the first aspect of the present invention, the third power supply may be a USB power supply section. The printing system can efficiently use the third power of the USB power supply without increasing the size of the USB power supply.

In the invention according to the first aspect of the present invention, the power supply circuit includes a first wiring that electrically connects the second connection portion and the head, and a state in which the first wiring is conductive and a state in which the first wiring is not conductive. a second wiring that electrically connects the second connecting portion and the conveying motor; and a second switching section that switches between a conductive state and a non-conductive state of the second wiring; A second wiring electrically connected between the first switching portion of the first wiring and the head and electrically connected between the second switching portion of the second wiring and the transport motor. three wirings, a third switching portion for switching between a conducting state and a non-conducting state of the third wiring, and the first switching portion of the first wiring connected to the first connecting portion and the head. and a fourth wiring electrically connected between them. The printing system can supply at least part of the first power of the first power supply to the head when the first wiring and the third wiring are in a non-conducting state and the second wiring is in a conducting state, and the first power of the second power supply can be supplied to the head. At least a portion of the two powers can be supplied to the transport motor. The printing system can supply at least part of the first power of the first power supply to the head and the transport motor when the first wiring and the second wiring are in a non-conducting state and the third wiring is in a conducting state. In the printing system, when only the second power supply is connected, the third wiring is in a non-conducting state, and the first wiring and the second wiring are in a conducting state, at least part of the second power of the second power supply is transferred to the head. can be supplied to the motor.

In the invention according to the first aspect of the present invention, a third connection section to which a third power source can be connected is provided, the power supply circuit is connected to the third connection section, and the second wiring of the first wiring is connected to the third connection section. A fifth wiring electrically connected between the connecting portion and the first switching portion may be provided. A printing system can use a first power supply, a second power supply, and a third power supply to power a head or a transport motor.

In the invention according to the first aspect of the present invention, the power supply circuit is connected to the first wiring, the fifth wiring, and ground, and is generated in the third connection section to which the third power supply is not connected. a first bleeder circuit for discharging electric charge; a first bleeder resistor connected to the first bleeder circuit and connected to the fifth wiring; and a resistor connected to the first wiring, the fifth wiring, and the ground. , a second bleeder circuit that discharges the charge generated in the second connection portion to which the second power supply is not connected; and a second bleeder resistor connected to the second bleeder circuit and connected to the first wiring. and may be provided. The printing system may be connected to only one of the second power supply and the third power supply. In this case, in the printing system, an unnecessary voltage may be generated in the connection to which the power supply is not connected among the second connection and the third connection. The first bleeder circuit and the first bleeder resistor can prevent voltage from being generated in the third connecting portion to which the third power supply is not connected. Also, the second bleeder circuit and the second bleeder resistor can prevent voltage from being generated in the second connection section to which the second power supply is not connected. Therefore, the printing system can prevent erroneous detection of the connected power supply.

The invention according to the first aspect of the present invention may further include a detection unit that detects whether a usable power supply is connected by detecting voltages of the plurality of power supplies. The printing system can identify available power sources by the detector.

The invention according to the first aspect of the present invention may further include a display unit that displays information indicating which of the plurality of power sources is being used. By checking the display unit, the user can determine which of the plurality of power supplies is being used.

In the invention according to the first aspect of the present invention, the display unit is a plurality of LEDs provided corresponding to the plurality of power sources, and the plurality of LEDs light up corresponding to the power source being used. may The user can grasp the power supply being used based on the lighting state of the LED.

In the invention according to the first aspect of the present invention, the display unit is an LED capable of emitting a plurality of colors, and the LED lights in a color corresponding to the power supply being used among the plurality of colors. may The user can grasp the power supply being used based on the color of the LED.

A printing system according to a second aspect of the present invention is a printing system that can be driven by a plurality of power sources, and includes a head that performs printing on a medium and a transport motor that generates power for transporting the medium. a first connection section to which a first power supply can be connected; a second connection section to which a second power supply can be connected; and a power supply circuit for supplying power to the head and the transport motor, a circuit based on power consumed by the head and the transport motor when the first power supply is connected to the first connection and the second power supply is connected to the second connection, At least part of the first power that is the power of the first power supply and at least part of the second power that is the power of the second power supply are supplied to one of the head and the transport motor. and supplying the other of at least part of the first power and at least part of the second power to the other of the head and the transport motor based on the power consumed by the head and the transport motor. characterized by

The printing system can efficiently supply the first power of the first power supply and the second power of the second power supply to the head and the transport motor, respectively, based on the power consumed by the head and the transport motor. Therefore, the printing system does not need to increase the size of each power supply to drive the head and the transport motor. Therefore, the printing system can be suppressed from becoming large.

In the invention according to the second aspect of the present invention, the power supply circuit consumes the power of the power supply of the first power supply or the second power supply, whichever is larger, out of the head and the transport motor. The power of the power supply that can supply less power out of the first power supply and the second power supply is supplied to the one of the head and the transport motor that consumes less power. may be supplied. The printing system can supply the power of the power supply capable of supplying a large amount of power to the one that consumes a large amount of power. In addition, the printing system can supply the power of the power supply capable of supplying a small amount of power to the side that consumes less power.

In the invention according to the first aspect of the present invention, the printing system includes a printing apparatus including at least the head, the transport motor, the power supply circuit, the first connection section, and the second connection section. a medium supply device that supplies the medium to the printing device; and a transmission unit that transmits the power from the power supply circuit of the printing device to the medium supply device, wherein the power supply circuit When one power supply is connected to the first connection and the second power supply is connected to the second connection, at least part of the first power is supplied to the head, and the second power supply is supplied to the head. At least part of the electric power may be supplied to the transport motor and supplied to the medium feeding device via the transmission section. The printing system can efficiently use the first power of the first power supply and the second power of the second power supply to drive the printing device and the media feeder. As a result, the printing system does not require a large power supply for driving the medium feeding device. Additionally, the printing system can use two power supplies to increase printing speed.

In the invention according to the first aspect of the present invention, the printing system includes a printing device having at least the head, the transport motor, the first connection section, and the power supply circuit, and the second connection section. and a medium supply device for supplying the medium to the printing device, and when the first power supply is connected to the first connection section, the power supply circuit supplies at least the first power part of the second power is supplied to the head and the transport motor, and at least part of the second power is supplied to the medium feeding device when the second power supply is connected to the second connection section. good too. The printing system uses a first power supply and a second power supply to drive the printing device and the media feeder, respectively. Therefore, the printing system can drive the printing device and the medium feeding device without increasing the size of the printing device.

In the invention according to the first aspect of the present invention, it is an acquisition unit that acquires the temperature of the first power supply, and a speed at which printing is executed on the medium based on the temperature of the first power supply acquired by the acquisition unit. determining means for determining a printing speed, wherein the determining means reduces the printing speed as the temperature of the first power source acquired by the acquiring means decreases, and the first power source increases the temperature of the first power source; The first power source is connected to the first connection portion and the second power source is connected to the connection portion and the second power source is not connected to the second connection portion, compared to the case where the second power source is connected to the connection portion The printing speed may be determined such that it is faster or the same when connected to the second connection. In the printing system described above, when the temperature of the first power supply drops, the power that can be supplied by the first power supply drops. Even when the temperature of the first power supply is low, the printing system drives the head with at least part of the first power of the first power supply and drives the transport motor with at least part of the second power of the second power supply. Therefore, when the temperature of the first power supply drops, the printing system can print faster than when the head and transport motor are driven only by the first power supply.

In the invention according to the first aspect of the present invention, when the first power supply is connected to the first connection part and the second power supply is connected to the second connection part, the first power supply supplies a determination means for determining whether or not to execute a power suppression mode for suppressing at least a portion of the first power, and a plurality of heating elements of the head when the determination means determines that the power suppression mode is to be implemented. and limiting means for limiting the number of on-dots that can be heated simultaneously. The printing system can reduce the first power supplied by the first power supply by limiting the number of on-dots that can be heated simultaneously.

1 is a perspective view of a printer 1; FIG. 2 is a diagram showing an electrical configuration of the printer 1; FIG. 2 is a block diagram showing a power detection unit 21A, a power management unit 21B, and a power adjustment unit 21C of the printing apparatus 1; FIG. 4 is a table showing driving patterns of the head 10 and the transport motor 9; 2 is a circuit diagram showing the power supply circuit 100; FIG. It is a figure which shows the 1st bleeder circuit 38A, the 2nd bleeder circuit 38B, the 1st bleeder resistance 38C, and the 2nd bleeder resistance 38D. FIG. 4 is a diagram showing lighting patterns of LEDs 4A to 4D; 4 is a chart showing the relationship between the power supply connected to the printer 1 and the printing speed; 4 is a flowchart showing main processing; It is a flowchart which shows determination processing. 4 is a flowchart showing speed determination processing; FIG. 12 is a flowchart showing speed determination processing, continued from FIG. 11; FIG. 13 is a flowchart showing speed determination processing, continued from FIG. 12 ; FIG. 3 is a diagram showing a printing system 300A; FIG. FIG. 3 shows a printing system 300B; It is a figure which shows 100 A of power supply circuits in a modification. It is a figure which shows the power supply circuit 100B in a modification.

A printing apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings. Below, the lower left, upper right, upper left, lower right, upper, and lower sides of FIG.

The printing apparatus 1 shown in FIGS. 1 and 2 can be driven by a plurality of power supplies. The multiple power sources include battery 29 , AC adapter 30 and USB power supply 31 . In the printer 1, it is assumed that the AC adapter 30 and the USB power supply unit 31 are not used at the same time. The printing device 1 prints an image on a medium M based on print data. Although the medium M is not limited to a specific medium, it may be in the form of a sheet or tape, for example, and in this embodiment, it is heat-sensitive cut paper.

As shown in FIG. 1, the printing device 1 has a case 2 . The case 2 has a rectangular parallelepiped shape, and is longer in the left-right direction than in the front-rear direction and the up-down direction. A battery mounting portion 34 (see FIG. 5) is provided at the rear lower portion of the case 2 . The battery mounting portion 34 is connectable with the battery 29 .

An AC adapter jack 32 and a USB jack 33 are provided at the right end of the case 2 . A USB jack 33 is provided in front of the AC adapter jack 32 . The AC adapter jack 32 is connectable with an AC adapter 30 (see FIG. 5) as an external power supply. The USB jack 33 can be connected with the USB power supply unit 31 (see FIG. 5) as an external power supply.

The operation section 7 is provided at the left end of the case 2 . The operation unit 7 is a physical button for inputting various instructions. The operation unit 7 only needs to be capable of inputting various instructions, and may be configured with a dial, a touch panel, or the like.

The display unit 4 is provided at the left end and the front end of the printer 1 . The display unit 4 can display various types of information. The display unit 4 is a plurality of LEDs 4A to 4D. The plurality of LEDs 4A to 4D are arranged in the horizontal direction.

The electrical configuration of the printer 1 will be described with reference to FIG. The printing device 1 includes a power supply circuit 100 and a printing section 3 . The power supply circuit 100 supplies power from the battery 29 (see FIGS. 3 and 5), the AC adapter 30 (see FIGS. 3 and 5), and the USB power supply unit 31 (see FIGS. 3 and 5) to the printing unit 3. supply to The power supplied by battery 29 is referred to as primary power. The power supplied by the AC adapter 30 is called second power. The power supplied by the USB power supply unit 31 is called third power. Note that the first power is greater than the second power. Also, the second power is greater than the third power.

The battery 29 can output a voltage of 10.8V. AC adapter 30 can output a voltage of 15V. The USB power supply unit 31 can output a voltage of 15V. The USB power supply unit 31 is a so-called "USB Power Delivery".

The printing section 3 includes a CPU 21 , a ROM 22 , a RAM 24 , drive circuits 11 and 12 , a transport motor 9 , a thermal head (hereinafter referred to as “head 10 ”), a temperature sensor 25 , an operation section 7 and a display section 4 .

ROM 22, RAM 24, temperature sensor 25, operation unit 7, display unit 4, and drive circuits 11 and 12 are electrically connected to CPU 21, respectively. Various programs necessary for controlling the printer 1 are stored in the ROM 22 . The CPU 21 performs various calculations based on these programs. A storage area is provided in the RAM 24 . Various calculation data are stored in the storage area.

The temperature sensor 25 is provided on the battery mounting portion 34 . Temperature sensor 25 detects temperature t of battery 29 . The temperature sensor 25 is connected to the CPU 21 and transmits the detection result of the temperature t of the battery 29 to the CPU 21 . The operation unit 7 is connected to the CPU 21 and transmits various instructions to the CPU 21 . The display unit 4 is connected to the CPU 21 and displays various information.

A transport motor 9 is connected to the drive circuit 11 . The conveying motor 9 is provided inside the case 2 . The transport motor 9 generates power for transporting the medium M. As shown in FIG. The transport motor 9 transports the medium M by being driven by the drive circuit 11 .

A head 10 is connected to the drive circuit 12 . The head 10 is provided inside the case 2 . Head 10 performs printing on medium M. FIG. Head 10 includes a plurality of heating elements. The head 10 selectively heats a plurality of heating elements by driving the driving circuit 12 . The CPU 21 executes printing on the medium M by driving the transport motor 9 and the head 10 using the driving circuits 11 and 12, respectively.

The power detection unit 21A, the power management unit 21B, and the power adjustment unit 21C of the CPU 21 will be described with reference to FIG. The power detection unit 21A detects whether a usable power source among the AC adapter 30, the USB power supply unit 31, and the battery 29 is connected. The power detection unit 21A detects voltages of the AC adapter 30, the USB power supply unit 31, and the battery 29, respectively. An ADC (Analog Digital Converter) is used for voltage detection.

When the voltage output from the AC adapter 30 is equal to or higher than the second threshold, the power detection unit 21A determines that the AC adapter 30 is a usable power source. The second threshold is, for example, 13V. The first threshold will be described later. Further, when the voltage output from the USB power supply unit 31 is equal to or higher than the third threshold, the power supply detection unit 21A determines that the USB power supply unit 31 is a usable power source. The third threshold is, for example, 11V.

When the voltage output from the battery 29 is equal to or higher than the first threshold, the power detection unit 21A determines that the battery 29 is a usable power source. Also, when the voltage output by the battery 29 is smaller than the first threshold, the CPU 21 determines that the battery 29 is unusable.

The first threshold has a fourth threshold and a fifth threshold. The fifth threshold is greater than the fourth threshold. The fourth threshold is 8V, for example. The fifth threshold is, for example, 9V. When the power supply (AC adapter 30, USB power supply unit 31) other than the battery 29 among the plurality of power supplies cannot be used, and the voltage output from the battery 29 is equal to or higher than the fourth threshold, the power supply detection unit 21A It determines that the battery 29 is a usable power source. In other words, the power detection unit 21A uses the fourth threshold when a power source other than the battery 29 (AC adapter 30 or USB power supply unit 31) cannot be used.

If the power source (AC adapter 30 or USB power supply unit 31) other than the battery 29 among the plurality of power sources can be used and the voltage output from the battery 29 is equal to or higher than the fifth threshold, the power source detection unit 21A detects that the battery 29 is determined to be a usable power source. That is, the power detection unit 21A uses the fifth threshold when a power source other than the battery 29 (the AC adapter 30 or the USB power supply unit 31) can be used.

The power management unit 21B manages the power required for printing by the head 10 and the transport motor 9 based on the print data stored in the ROM 22 and RAM 24 . The power required by the head 10 is calculated based on data such as the number of ON dots per line. The electric power required by the transport motor 9 is calculated based on data such as transport speed and transport amount during printing.

The power adjustment unit 21C determines the supply destination of each power supply according to the detection result of the power detection unit 21A and the calculation result of the power management unit 22B. The power adjustment unit 21C controls the power supply circuit 100, which will be described later, to switch the power supply destination of each power supply. Note that the CPU 21, the ROM 22, the RAM 24, the temperature sensor 25, and the like may be supplied with part of the power from each power supply connected to the printing apparatus 1. FIG.

The power adjustment unit 21</b>C supplies the usable power of the power supply to the head 10 and the transport motor 9 . For example, when the CPU 21 determines that only one of the battery 29, the AC adapter 30, and the USB power supply unit 31 can be used, the CPU 21 supplies power from the one to the head 10 and the transport motor 9. . For example, when only the battery 29 can be used, the head 10 and the transport motor 9 are supplied with at least part of the first power of the battery 29 .

On the other hand, for example, when it is determined that both the battery 29 and the AC adapter 30 can be used, the power adjustment unit 21C adjusts at least one of the first power, which is the power of the battery 29 connected to the battery mounting unit 34. portion is supplied to the head 10 . In this case, the power adjuster 21</b>C supplies at least part of the second power, which is the power of the AC adapter 30 connected to the AC adapter jack 32 , to the transport motor 9 .

A drive pattern of the printer 1 will be described with reference to FIG. If it is determined that both the AC adapter 30 (USB power supply unit 31) and the battery 29 are unusable, the printer 1 cannot print. When the AC adapter 30 (USB power supply unit 31) cannot be used and only the battery 29 can be used, the printing apparatus 1 is driven by the single power source of the battery 29 only.

When the AC adapter 30 (USB power supply unit 31) is usable and only the battery 29 is unusable, only the AC adapter 30 (USB power supply unit 31) is driven with a single power supply. When both the AC adapter 30 (USB power supply unit 31) and the battery 29 can be used, the printing apparatus 1 executes driving with multiple power supplies.

The power supply circuit 100 will be described with reference to FIG. The power supply circuit 100 supplies power to the head 10 and the transport motor 9 based on power from any one of the battery 29 , the AC adapter 30 , and the USB power supply section 31 . That is, the power supply circuit 100 supplies the first power, which is the power of the battery 29 , the second power, which is the power of the AC adapter 30 , and the third power, which is the power of the USB power supply unit 31 , to the head 10 and the transport motor 9 . supply to

The power supply circuit 100 includes an AC adapter jack 32, a USB jack 33, a battery mounting portion 34, a voltage conversion portion 39, wirings L1 to L5, switching portions SW1 to SW3, and a bleeder circuit .

AC adapter jack 32 is electrically connected to the anode of diode D1. A cathode of the diode D1 is electrically connected to the first switching section SW1. The first switching unit SW1 is an electronic device such as a transistor that can be turned on and off. The first switching section SW1 is electrically connected to the drive circuit 12 . A drive circuit 12 is electrically connected to the head 10 . The wiring that electrically connects the AC adapter jack 32 and the head 10 is hereinafter referred to as "first wiring L1". The first switching unit SW1 switches between a state in which the first wiring L1 is conductive and a state in which the first wiring L1 is not conductive.

The second switching portion SW2 is electrically connected between the cathode of the diode D1 and the first switching portion SW1 in the first wiring L1. The second switching section SW2 is connected to the anode of the diode D2. The second switching unit SW2 is an electronic device such as a transistor that can be turned on and off. A cathode of the diode D2 is electrically connected to the drive circuit 11 . The drive circuit 11 is electrically connected to the carry motor 9 . The wiring that electrically connects the AC adapter jack 32 and the transport motor 9 is hereinafter referred to as "second wiring L2". The second switching unit SW2 switches between a conductive state and a non-conductive state of the second wiring L2.

The third switching section SW3 is electrically connected between the first switching section SW1 and the drive circuit 12 in the first wiring L1. The third switching section SW3 is an electronic device such as a transistor that can be turned on and off. The third switching section SW3 is connected to the anode of the diode D3. The cathode of the diode D3 is electrically connected between the second switching section SW2 and the driving circuit 11 in the second wiring L2. In the following, the wiring that electrically connects between the first switching section SW1 and the driving circuit 12 in the first wiring L1 and between the second switching section SW2 and the driving circuit 11 in the second wiring L2 is It is called "third wiring L3". The third switching unit SW3 switches between a state in which the third wiring L3 is conductive and a state in which the third wiring L3 is not conductive.

The battery mounting portion 34 is connected to the voltage conversion portion 39 . The voltage converter 39 boosts the voltage of the battery 29 to 15V. Voltage converter 39 is connected to the anode of diode D4. The cathode of the diode D4 is electrically connected between the first switching section SW1 and the drive circuit 12 in the first wiring L1. Hereinafter, the wiring that is connected to the battery 29 and electrically connects between the first switching section SW1 and the drive circuit 12 among the first wirings L1 is referred to as "fourth wiring L4".

The USB jack 33 is connectable with the USB power supply unit 31 . USB jack 33 is connected to the anode of diode D5. The cathode of the diode D5 is electrically connected between the first switching part SW1 and the cathode of the diode D1 in the first wiring L1. Hereinafter, the wiring that is connected to the USB jack 33 and that is electrically connected between the AC adapter jack 32 and the first switching section SW1 among the first wirings L1 will be referred to as a "fifth wiring L5".

Driving with a single power supply of only the battery 29 will be described. In this case, the AC adapter 30 and USB power supply section 31 are not connected to the AC adapter jack 32 and USB jack 33, respectively. The power adjustment unit 21C turns on the third switching unit SW3 and turns off the first switching unit SW1 and the second switching unit SW2. Thereby, at least part of the first electric power of the battery 29 is supplied to the head 10 via the fourth wiring L4 and the first wiring L1. Also, at least part of the first electric power of the battery 29 is supplied to the transport motor 9 via the fourth wiring L4, the first wiring L1, the third wiring L3, and the second wiring L2. That is, when the battery 29 is connected to the battery mounting portion 34 and the AC adapter 30 is not connected to the AC adapter jack 32, the power supply circuit 100 supplies at least part of the first power to the head 10 and the transport motor 9. supply to

Driving with a single power supply of only the AC adapter 30 will be described. In this case, the battery 29 and USB power supply section 31 are not connected to the battery mounting section 34 and USB jack 33 . The power adjustment unit 21C turns on the first switching unit SW1 and the second switching unit SW2, and turns off the third switching unit SW3. Thereby, at least part of the second power of the AC adapter 30 is supplied to the head 10 via the first wiring L1. Also, at least part of the second power of the AC adapter 30 is supplied to the carry motor 9 via the second wiring L2. That is, when the AC adapter 30 is connected to the AC adapter jack 32 and the battery 29 is not connected to the battery mounting portion 34, the power supply circuit 100 supplies at least part of the second power to the head 10 and the transport motor 9. supply to

Driving only the USB power supply unit 31 with a single power supply will be described. In this case, the battery 29 and AC adapter 30 are not connected to the battery mounting portion 34 and USB jack 33 . The power adjustment unit 21C turns on the first switching unit SW1 and the second switching unit SW2, and turns off the third switching unit SW3. As a result, at least part of the third power of the USB power supply unit 31 is supplied to the head 10 via the fifth wiring L5 and the first wiring L1. Also, at least part of the third power of the USB power supply unit 31 is supplied to the transport motor 9 via the fifth wiring L5 and the second wiring L2.

Driving the battery 29 and the AC adapter 30 with a plurality of power sources will be described. In this case, it does not matter whether the USB power supply unit 31 is connected or not. For example, when the AC adapter 30 and the USB power supply unit 31 are connected to the printing apparatus 1 at the same time, the AC adapter 30 should be preferentially used. The power adjustment unit 21C turns on the second switching unit SW2 and turns off the first switching unit SW1 and the third switching unit SW3. Accordingly, at least part of the first power of the battery 29 is supplied only to the head 10 via the fourth wiring L4 and the first wiring L1. Also, at least part of the second power of the AC adapter 30 is supplied only to the carry motor 9 via the second wiring L2. That is, the power supply circuit 100 supplies at least part of the first power to the head 10 when the battery 29 is connected to the battery mounting portion 34 and the AC adapter 30 is connected to the AC adapter jack 32. , supplies at least part of the second power to the transport motor 9 .

Driving the battery 29 and the USB power supply unit 31 with a plurality of power supplies will be described. In this case, AC adapter 30 is not connected to AC adapter jack 32 . The power adjustment unit 21C turns on the second switching unit SW2 and turns off the first switching unit SW1 and the third switching unit SW3. Accordingly, at least part of the first power of the battery 29 is supplied only to the head 10 via the fourth wiring L4 and the first wiring L1. Also, at least part of the third power of the USB power supply unit 31 is supplied only to the carry motor 9 via the fifth wiring L5 and the second wiring L2. That is, when the battery 29 is connected to the battery mounting portion 34 and the USB power supply portion 31 is connected to the USB jack 33, the power supply circuit 100 supplies at least part of the first power to the head 10, At least part of the third electric power is supplied to the transport motor 9 .

As described above, when multiple power sources are used for driving, the power supply circuit 100 supplies at least a portion of the first power to the head 10 and supplies at least a portion of the second or third power to the transport motor. [0] supply to 9 at the same time.

The bleeder circuit 38 will be described with reference to FIG. The bleeder circuit 38 includes a first bleeder circuit 38A, a first bleeder resistor 38C, a second bleeder circuit 38B, and a second bleeder resistor 38D.

The first bleeder circuit 38A discharges electric charges generated in the USB jack 33 to which the USB power supply section 31 is not connected. The first bleeder circuit 38A includes resistors R1 to R3 and transistors Tr1 and Tr2. One end of the resistor R1 is electrically connected to the fifth wiring L5. The other end of resistor R1 is electrically connected to one end of resistor R2. The other end of resistor R2 is electrically connected to ground GND. One end of the resistor R3 is electrically connected to the first wiring L1.

The base of transistor Tr1 is electrically connected to one end of resistor R2. A collector of the transistor Tr1 is electrically connected to the other end of the resistor R3. The emitter of transistor Tr1 is electrically connected to ground GND.

The base of transistor Tr2 is electrically connected to the other end of resistor R3 and the collector of transistor Tr1. The emitter of transistor Tr2 is electrically connected to ground GND. A collector of the transistor Tr2 is connected to one end of the first bleeder resistor 38C. The other end of the first bleeder resistor 38C is connected to the fifth wiring L5. That is, the first bleeder circuit 38A is connected to the first wiring L1, the fifth wiring L5, and the ground GND. Also, the first bleeder resistor 38C is connected to the first bleeder circuit 38A and to the fifth wiring L5.

The second bleeder circuit 38B discharges electric charges generated in the AC adapter jack 32 to which the AC adapter 30 is not connected. The second bleeder circuit 38B includes resistors R11 to R13 and transistors Tr11 and Tr12. One end of the resistor R11 is electrically connected to the first wiring L1. The other end of resistor R11 is electrically connected to one end of resistor R12. The other end of resistor R12 is electrically connected to ground GND. One end of the resistor R13 is electrically connected to the fifth wiring L5.

The base of transistor Tr11 is electrically connected to one end of resistor R12. A collector of the transistor Tr1 is electrically connected to the other end of the resistor R13. The emitter of transistor Tr11 is electrically connected to ground GND.

The base of the transistor Tr12 is electrically connected to the other end of the resistor R13 and the collector of the transistor Tr11. The emitter of transistor Tr12 is electrically connected to ground GND. A collector of the transistor Tr12 is connected to one end of the second bleeder resistor 38D. The other end of the second bleeder resistor 38D is connected to the first wiring L1. That is, the second bleeder circuit 38B connects to the first wiring L1, the fifth wiring L5, and the ground GND. Also, the second bleeder resistor 38D is connected to the second bleeder circuit 38B and to the first wiring L1.

A case where the AC adapter 30 is connected to the AC adapter jack 32 and the USB power supply unit 31 is not connected to the USB jack 33 will be described. In this case, the transistor Tr1 is turned off because power is not supplied from the USB jack 33 . On the other hand, since the transistor Tr2 is supplied with power from the AC adapter jack 32, it is turned on.

Here, when the fifth wiring L5 is charged, the first bleeder circuit 38A discharges the charge to the ground GND via the resistors R1 and R2. In this case, charges that cannot be completely discharged by the first bleeder circuit 38A may remain in the fifth wiring L5. The charges remaining in the fifth wiring L5 are discharged to the ground GND via the first bleeder resistor 38C and the transistor Tr2. As a result, the first bleeder circuit 38A and the first bleeder resistor 38C can suppress voltage from being generated in the USB jack 33 and the fifth wiring L5 to which the USB power supply section 31 is not connected.

A case where the USB power supply unit 31 is connected to the USB jack 33 and the AC adapter 30 is not connected to the AC adapter jack 32 will be described. In this case, the transistor Tr11 is turned off because power is not supplied from the AC adapter 30 . On the other hand, the transistor Tr12 is turned on because power is supplied from the USB power supply section 31 .

Here, when electric charges are accumulated in the first wiring L1, the second bleeder circuit 38B discharges electric charges to the ground GND via the resistors R11 and R12. In this case, charges that cannot be completely discharged by the second bleeder circuit 38B may remain in the first wiring L1. The charge remaining in the first wiring L1 is discharged to the ground GND via the second bleeder resistor 38D and the transistor Tr12. Thereby, the second bleeder circuit 38B and the second bleeder resistor 38D can suppress the generation of voltage in the AC adapter jack 32 and the first wiring L1 to which the AC adapter 30 is not connected.

The display unit 4 will be described with reference to FIG. The display unit 4 displays information as to which of the AC adapter 30, the USB power supply unit 31, and the battery 29 is being used. The display mode of the display unit 4 includes a first mode (see FIGS. 7A to 7C) and a second mode (see FIGS. 7D and 7E). Each mode may be preset by the user.

As shown in FIGS. 7A to 7C, LED4A to LED4C are used in the first mode. For example, battery 29 corresponds to LED 4A. When battery 29 is in use, LED 4A lights up. AC adapter 30 corresponds to LED4B. When the AC adapter 30 is being used, the LED 4B lights up. The USB power feeding section 31 corresponds to the LED4C. When the USB power feeding section 31 is used, the LED 4C lights up.

For example, when the printing apparatus 1 is driven by a single power supply of only the battery 29, only the LED 4A is lit (see FIG. 7A). For example, when the printing apparatus 1 is driven by multiple power sources such as the battery 29 and the AC adapter 30, the LEDs 4A and 4B are lit (see FIG. 7B). For example, when the printer 1 is driven by multiple power sources, the battery 29 and the USB power supply unit 31, the LEDs 4A and 4C are lit (see FIG. 7C). In other words, the display unit 4 is a plurality of LEDs 4A to 4C provided corresponding to a plurality of power sources, and the plurality of LEDs 4A to 4C are illuminated corresponding to the power sources being used.

As shown in FIGS. 7(D) and 7(E), in the second mode, only LED4D is used. For example, the LED 4D can emit multiple colors depending on the power supply being used. The LED 4D lights up in a color corresponding to the power supply being used, among a plurality of colors. For example, when the battery 29 is driven by a single power supply, the LED 4D lights up in red. Also, when the battery 29 and the AC adapter 30 are being driven by a plurality of power sources, the LED 4D lights up in blue.

The printing speed will be described with reference to the table T in FIG. The table T is stored, for example, in the ROM 22 or the like. The printing speed of the printer 1 is determined based on various conditions. The various conditions include the type of power supply (battery 29, AC adapter 30, USB power supply unit 31) that drives the printing apparatus 1, the temperature t detected by the temperature sensor 25, and whether or not the high speed mode and current suppression mode are set. .

The printing speed is set to one of speeds A to D, for example. Speed A is the highest speed, for example 90 [mm/sec]. Velocity B is, for example, 45 [mm/sec]. The speed C is, for example, 30 [mm/sec]. Speed D is the slowest speed, for example 22 [mm/sec].

When the AC adapter 30 is driven by a single power supply, the printing speed is set to speed C, for example. The printing speed is constant regardless of other conditions. Note that the printing speed is set in the same manner as in the case of the AC adapter 30 when the USB power supply unit 31 is driven by a single power supply.

When the battery 29 is driven by a single power supply, the printing speed is determined based on the detected temperature t of the battery 29 . Further, since the first power of the battery 29 is larger than the second power of the AC adapter 30, the speed can be set faster than when the AC adapter 30 is driven by a single power supply. When the temperature t of the battery 29 is equal to or higher than 20° C. and lower than 50° C., the printing speed is set to speed B.

In a low-temperature environment, the first electric power that can be supplied by the battery 29 becomes small. Therefore, the printer 1 reduces the printing speed as the temperature t of the battery 29 decreases. When the temperature t of the battery 29 is 10° C. or more and less than 20° C., the printing speed is set to speed C. This speed is the same as for the AC adapter 30 . Furthermore, when the temperature is 0° C. or more and less than 10° C., the printing speed is set to the slowest speed D. This speed is slower than the speed C of the AC adapter 30 .

In the case of driving with a plurality of power sources, the battery 29 and the AC adapter 30 (USB power supply unit 31), the printing apparatus 1 is driven in a high speed mode or a low power mode according to the user's selection. For example, when the printing device 1 is started, the printing device 1 is set to the high speed mode, and then the user sets the printing device 1 to the low power mode.

In the high-speed mode, the printing apparatus 1 can set the printing speed to a higher speed than in the case of driving with a single power supply from the battery 29 . When the temperature t of the battery 29 is equal to or higher than 0°C and lower than 10°C, the printing speed is set to speed C. When the temperature t of the battery 29 is 10° C. or more and less than 20° C., the printing speed is set to speed B. When the temperature t of the battery 29 is equal to or higher than 20° C. and lower than 50° C., the printing speed is set to speed A.

The power saving mode is a mode set by the user to extend the life of the battery 29 when driving with multiple power sources. When the power saving mode is executed, the printing speed is reduced compared to the case of the high speed mode. In this case, the printer 1 limits the number of on-dots that can simultaneously heat the heating elements of the head 10 to a smaller number than in the high-speed mode. As a result, the printing apparatus 1 can reduce power consumption. For example, in the power suppression mode, based on the temperature t of the battery 29, the speed (speed B to speed D) is set to be the same as the speed when only the battery 29 is driven by a single power supply. That is, by switching between the high-speed mode and the power saving mode, the printing apparatus 1 performs printing so that driving with multiple power sources is faster or the same as driving with only the battery 29 with a single power source. Determine speed.

Main processing will be described with reference to FIG. First, the power supply is connected to the printer 1 by the user. In this state, when the printer 1 is powered on by the user operating the operation unit 7, the CPU 21 reads a program from the ROM 22 and executes the main process. When the main process is executed, the CPU 21 designates one of the plurality of power supplies (S1). In this case, the CPU 21 designates any one of the AC adapter 30 , the USB power supply section 31 and the battery 29 .

The CPU 21 acquires the voltage of the specified power supply using the power supply detection unit 21A (S3). Next, the CPU 21 determines whether or not the power source from which the voltage is obtained is the battery 29 (S5). When determining that it is not the battery 29 (S5: NO), the CPU 21 determines whether or not the voltage obtained in the process of S3 is equal to or higher than a predetermined threshold (S7). In this case, the CPU 21 uses the second threshold or the third threshold as the predetermined threshold. When the designated power supply is the AC adapter 30, the CPU 21 compares the voltage acquired in the process of S3 with the second threshold. Further, when the designated power supply is the USB power supply unit 31, the CPU 21 compares the voltage obtained in the process of S3 with the third threshold.

When determining that the voltage acquired in the process of S3 is equal to or higher than the predetermined threshold (S7: YES), the CPU 21 determines that the power supply specified in the process of S1 is available (S9). In this case, the CPU 21 temporarily stores in the RAM 24 information indicating that the power supply specified in the process of S1 is available. CPU21 advances a process to S19.

On the other hand, when determining that the voltage detected in the process of S3 is smaller than the predetermined threshold value (S7: NO), the CPU 21 determines that the power supply specified in the process of S1 cannot be used (S11). In this case, the CPU 21 temporarily stores in the RAM 24 information indicating that the power source specified in the process of S1 is unusable. CPU21 advances a process to S19.

On the other hand, when it is determined that the power source from which the voltage is acquired is the battery 29 (S5: YES), the CPU 21 acquires the temperature t of the battery 29 (S13). In this case, the CPU 21 temporarily stores the result of detection by the temperature sensor 25 in the RAM 24 .

The CPU 21 determines whether or not the temperature t of the battery 29 obtained from the temperature sensor 25 is within a predetermined temperature range (S15). Here, the predetermined temperature range is a value based on the specifications of the battery 29, and is a range within which the battery 29 can normally output the first electric power. For example, the predetermined temperature range is 0°C to 50°C.

When determining that the temperature t of the battery 29 obtained from the temperature sensor 25 is not within the predetermined temperature range (S15: NO), the CPU 21 determines that the battery 29 is unusable (S11). In this case, the CPU 21 temporarily stores information indicating that the battery 29 is unusable in the RAM 24 . CPU21 advances a process to S19.

When determining that the temperature t of the battery 29 obtained from the temperature sensor 25 is within the predetermined temperature range (S15: YES), the CPU 21 determines that the battery 29 can be used (S17). In this case, the CPU 21 temporarily stores information indicating that the battery 29 is usable in the RAM 24 . CPU21 advances a process to S19.

The CPU 21 determines whether or not confirmation of usability has been completed for all the power supplies (S19). If it is determined that confirmation of usability has not been completed for all power supplies (S19: NO), the CPU 21 returns the process to S1 and designates the next power supply. When it is determined that confirmation of usability has been completed for all power sources (S19: YES), the CPU 21 executes determination processing (S21).

The determination processing will be described with reference to FIG. When the determination process is started, the CPU 21 determines whether or not a power supply other than the battery 29 can be used (S101). In this case, the CPU 21 determines whether the AC adapter 30 and the USB power supply section 31 can be used based on the information stored in the RAM 24 .

When determining that a power supply other than the battery 29 is unusable (S101: NO), the CPU 21 determines whether the battery 29 is usable (S103). In this case, the CPU 21 refers to the RAM 24 to determine whether the battery 29 can be used.

When determining that the battery 29 is unusable (S103: NO), the CPU 21 determines that all of the plurality of power supplies are unusable because there is no usable power supply (S105). In this case, the CPU 21 stores in the RAM 24 information indicating that all power supplies are unusable. The CPU 21 returns to the main process and executes the process of S23. In this case, the CPU 21 does not execute printing after the completion of the main processing because there is no usable power source among the plurality of power sources.

On the other hand, when determining that the battery 29 can be used (S103: YES), the CPU 21 determines whether or not the voltage of the battery 29 is equal to or higher than a predetermined threshold value (S107). In this case, the CPU 21 uses the fourth threshold as the predetermined threshold. When determining that the voltage of the battery 29 is equal to or higher than the predetermined threshold (S107: YES), the CPU 21 determines that only the battery 29 can be used (S109). In this case, the printing apparatus 1 can be driven by a single power source, which is only the battery 29 . The CPU 21 temporarily stores information indicating that only the battery 29 can be used in the RAM 24 . The CPU 21 returns to the main process and executes the process of S23.

On the other hand, when determining that a power supply other than the battery 29 is available (S101: YES), the CPU 21 determines whether the battery 29 is available (S111). When determining that the battery 29 cannot be used (S111: NO), the CPU 21 determines that only power sources other than the battery 29 can be used (S113). In this case, the printing apparatus 1 can be driven with a single power supply from the AC adapter 30 or the USB power supply unit 31 . The CPU 21 temporarily stores in the RAM 24 information indicating that only the AC adapter 30 or the USB power supply unit 31 can be used. The CPU 21 returns to the main process and executes the process of S23.

When determining that the battery 29 can be used (S111: YES), the CPU 21 determines whether or not the voltage of the battery 29 is equal to or higher than a predetermined threshold (S115). In this case, the CPU 21 uses the fifth threshold as the predetermined threshold. When determining that the voltage of the battery 29 is lower than the predetermined threshold value (S115: NO), the CPU 21 determines that only a power supply other than the battery 29 can be used (S113). 30 or the USB power supply unit 31 can be driven with a single power supply. The CPU 21 temporarily stores in the RAM 24 information indicating that only the AC adapter 30 or the USB power supply unit 31 can be used. The CPU 21 returns to the main process and executes the process of S23.

On the other hand, when determining that the voltage of the battery 29 is equal to or higher than the predetermined threshold (S115: YES), the CPU 21 determines that the battery 29 and other power sources can be used (S117). In this case, it is possible to drive with a plurality of power sources, one of the AC adapter 30, the USB power supply unit 31, and the battery 29. FIG. CPU 21 temporarily stores in RAM 24 information indicating that AC adapter 30 or USB power supply unit 31 and battery 29 can be used. The CPU 21 returns to the main process and executes the process of S23.

When the determination process of S21 ends, the CPU 21 determines whether or not all the power supplies are unusable (S23). If all power sources are unusable (S23: YES), the CPU 21 notifies the user that all power sources are unusable (S25). For example, the CPU 21 blinks the LEDs 4A to 4D in red. This allows the user to recognize that all power sources are unusable. The CPU 21 terminates the process.

On the other hand, when determining that all the power sources are not unusable (S23: NO), the CPU 21 executes power supply processing based on the available power sources stored in the RAM 24 (S27). When driving with a single power supply of only the battery 29 , the CPU 21 supplies at least part of the first power of the battery 29 to the head 10 and the transport motor 9 . When only the AC adapter 30 is driven by a single power supply, the CPU 21 supplies at least part of the second power of the AC adapter 30 to the head 10 and the transport motor 9 . When the USB power supply unit 31 is driven by a single power supply, the CPU 21 supplies at least part of the third power of the USB power supply unit 31 to the head 10 and the transport motor 9 .

When the battery 29 and the AC adapter 30 are driven by multiple power sources, the CPU 21 supplies at least part of the first power of the battery 29 to the head 10 and at least part of the second power of the AC adapter 30. , to the transport motor 9 .

When the battery 29 and the USB power supply unit 31 are driven by multiple power sources, the CPU 21 supplies at least part of the first power of the battery 29 to the head 10 and at least one of the third power of the USB power supply unit 31. , is supplied to the transport motor 9 . Next, the CPU 21 executes speed determination processing for determining the speed at which printing is executed (S29).

The speed determination process will be described with reference to FIGS. 11 to 13. FIG. When the speed determination process is started, the CPU 21 determines whether or not the driving is performed with a plurality of power sources (S201). Driving with multiple power supplies means driving the printer 1 with the battery 29 and the AC adapter 30 or driving the printer 1 with the battery 29 and the USB power supply section 31 .

When it is determined that it is not driven by a plurality of power sources (S201: NO), the CPU 21 determines whether or not it is driven by a single power source of the battery 29 (S203). If it is determined that the battery 29 is not driven by a single power supply (S203: NO), the CPU 21 is driven by a single power supply, either the AC adapter 30 or the USB power supply unit 31, so that the printing speed is determined by referring to the table T. The speed is set to C (S204). The CPU 21 returns the processing to the main processing.

When determining that the battery 29 is driven by a single power source (S203: YES), the CPU 21 determines whether the temperature t of the battery 29 is 0° C. or more and less than 10° C. (S205). When determining that the temperature t of the battery 29 is equal to or higher than 0° C. and lower than 10° C. (S205: YES), the CPU 21 refers to the table T and sets the printing speed to the speed D (S207). The CPU 21 returns the processing to the main processing.

When the temperature t of the battery 29 is not above 0° C. and below 10° C. (S205: NO), the CPU 21 determines whether the temperature t of the battery 29 is above 10° C. and below 20° C. (S209). When determining that the temperature t of the battery 29 is equal to or higher than 10° C. and lower than 20° C. (S209: YES), the CPU 21 refers to the table T and sets the printing speed to the speed C (S211). The CPU 21 returns the processing to the main processing.

When it is determined that the temperature t of the battery 29 is not 10° C. or more and less than 20° C. (S209: NO), the CPU 21 refers to the table T to determine the printing speed because the temperature t of the battery 29 is 20° C. or more and less than 50° C. is set as the speed B (S213). The CPU 21 returns the processing to the main processing.

On the other hand, if it is determined that it is driven by a plurality of power sources (S201: YES), the CPU 21 determines whether the temperature t of the battery 29 is 0° C. or more and less than 10° C. (S215). When determining that the temperature t of the battery 29 is 0° C. or more and less than 10° C. (S215: YES), the CPU 21 determines whether or not the power suppression mode is set (S217). Whether or not the power saving mode is set is determined by whether or not the power saving mode has been set by the user.

If it is determined that the power saving mode is not set (S217: NO), the high speed mode is set, so the CPU 21 refers to the table T and sets the printing speed to speed C (S219). The CPU 21 returns the processing to the main processing. When determining that the power saving mode is set (S217: YES), the CPU 21 sets the printing speed to speed D (S221). In this case, the CPU 21 limits the number of on-dots to be smaller than the number of on-dots at the speed C set in the process of S219. The CPU 21 returns the processing to the main processing.

On the other hand, when determining that the temperature t of the battery 29 is not above 0° C. and below 10° C. (S215: NO), the CPU 21 determines whether the temperature t of the battery 29 is above 10° C. and below 20° C. (S223). When determining that the temperature t of the battery 29 is 10° C. or more and less than 20° C. (S223: YES), the CPU 21 determines whether or not the power suppression mode is set (S225).

If it is determined that the power saving mode is not set (S225: NO), the high speed mode is set, so the CPU 21 refers to the table T and sets the printing speed to speed B (S227). The CPU 21 returns the processing to the main processing. When determining that the power saving mode is set (S225: YES), the CPU 21 refers to the table T and sets the printing speed to speed C (S229). In this case, the CPU 21 limits the number of on-dots to be smaller than the number of on-dots at the speed B set in the process of S227.

On the other hand, when determining that the temperature t of the battery 29 is not equal to or greater than 10° C. and less than 20° C. (S223: NO), the CPU 21 determines whether or not the power suppression mode is set (S231). When it is determined that the power reduction mode is not set (S231: NO), the CPU 21 refers to the table T because the high speed mode is set and the temperature t of the battery 29 is 20° C. or more and less than 50° C. to set the printing speed to speed A (S233). The CPU 21 returns the processing to the main processing. When determining that the power saving mode is set (S231: YES), the CPU 21 refers to the table T and sets the printing speed to speed B (S235). In this case, the CPU 21 limits the number of on-dots to be smaller than the number of on-dots at the speed A set in the process of S233. The CPU 21 returns the processing to the main processing.

When the speed determination process ends and the process is returned to the main process, the CPU 21 ends the main process. After that, the printing apparatus 1 can print at the set printing speed.

As described above, the power supply circuit 100 supplies at least part of the first power to the head when the battery 29 is connected to the battery mounting portion 34 and the AC adapter 30 is connected to the AC adapter jack 32 . 10 and supplies at least part of the second power to the transport motor 9 .

The printing apparatus 1 supplies the first power of the battery 29 to the head 10 and the second power to the transport motor 9 . Therefore, power supplied from a plurality of power sources can be used efficiently. Therefore, the printer 1 does not need to increase the size of each power supply to drive the head 10 and the transport motor 9 . Therefore, the printing apparatus 1 can be prevented from becoming large.

The power supply circuit 100 simultaneously supplies at least part of the first power to the head 10 and at least part of the second power to the transport motor 9 [0]. The printing apparatus 1 supplies the first electric power to the head 10 and the second electric power to the transport motor 9 at the same time, so that each electric power can be used efficiently.

The power supply circuit 100 supplies at least part of the first power to the head 10 and the transport motor 9 when the battery 29 is connected to the battery mounting portion 34 and the AC adapter 30 is not connected to the AC adapter jack 32 . do. The printing apparatus 1 can drive the head 10 and the transport motor 9 with the first power of the battery 29 alone.

The power supply circuit 100 supplies at least part of the second power to the head 10 and the transport motor 9 when the AC adapter 30 is connected to the AC adapter jack 32 and the battery 29 is not connected to the battery mounting portion 34 . do. The printing apparatus 1 can drive the head 10 and the transport motor 9 with the second power only from the AC adapter 30 .

The first power is greater than the second power. In the printing apparatus 1 , the head 10 may require more power than the head 10 and the transport motor 9 . In this case, the printing apparatus 1 supplies the head 10 with the first power of the battery 29 having higher power than the AC adapter 30 . Therefore, the printer 1 can efficiently supply power.

The plurality of power sources includes battery 29 , AC adapter 30 and USB power supply 31 . The printer 1 can efficiently use the electric power of the battery 29, the AC adapter 30, and the USB power supply unit 31 without enlarging them.

When the battery 29 is connected to the battery mounting portion 34 and the USB power supply portion 31 is connected to the USB jack 33, the power supply circuit 100 supplies at least a portion of the first power to the head 10, thereby supplying USB power. At least part of the third power, which is the power of the unit 31, is supplied to the transport motor 9. The printer 1 can be connected to a USB power supply unit 31 in addition to the battery 29 and the AC adapter 30 . The printer 1 can efficiently use the power of the battery 29 , the AC adapter 30 , and the USB power supply section 31 .

The power supply circuit 100 includes a first wiring L1, a first switching section SW1, a second wiring L2, a second switching section SW2, a third wiring L3, a third switching section SW3, and a fourth wiring L4. When the first wiring L1 and the third wiring L3 are in a non-conducting state and the second wiring L2 is in a conducting state, the printing apparatus 1 can supply at least part of the first electric power of the battery 29 to the head 10, and the AC At least part of the second power of the adapter 30 can be supplied to the transport motor 9 . When the first wiring L1 and the second wiring L2 are in a non-conducting state and the third wiring L3 is in a conducting state, the printing apparatus 1 supplies at least part of the first electric power of the battery 29 to the head 10 and the transport motor 9. can supply. When only the AC adapter 30 is connected to the printer 1, the third wiring L3 is in a non-conducting state, and the first wiring L1 and the second wiring L2 are in a conducting state, at least part of the second power of the AC adapter 30 can be supplied to the head 10 and the transport motor 9 .

The fifth wiring L5 is connected to the USB jack 33, and is electrically connected between the AC adapter jack 32 and the first switching section SW1 in the first wiring L1. The printing apparatus 1 can supply power to the head 10 or the transport motor 9 using the battery 29 , the AC adapter 30 and the USB power supply section 31 .

The power supply circuit 100 includes a first bleeder circuit 38A, a second bleeder circuit 38B, a first bleeder resistor 38C, and a second bleeder resistor 38D. The printer 1 may be connected to only one of the AC adapter 30 and the USB power supply unit 31 . In this case, in the printing apparatus 1, an unnecessary voltage may be generated in the connecting portion of the AC adapter jack 32 or the USB jack 33 to which the power supply is not connected. The first bleeder circuit 38A and the first bleeder resistor 38C can prevent voltage from being generated in the USB jack 33 to which the USB power supply section 31 is not connected. Also, the second bleeder circuit 38B and the second bleeder resistor 38D can prevent voltage from being generated in the AC adapter jack 32 to which the AC adapter 30 is not connected. Therefore, the printing apparatus 1 can prevent erroneous detection of the connected power supply.

The power detection unit 21A detects voltages of the battery 29, the AC adapter 30, and the USB power supply unit 31 to detect whether a usable power supply is connected. The printing apparatus 1 can identify usable power sources by the power source detection unit 21A.

The display unit 4 displays information as to which of the battery 29, the AC adapter 30, and the USB power supply unit 31 is being used. The user can determine which of the battery 29, the AC adapter 30, and the USB power supply unit 31 is being used by checking the display unit 4. FIG.

The display unit 4 is a plurality of LEDs 4 A to 4 C provided corresponding to the battery 29 , the AC adapter 30 and the USB power supply unit 31 . A plurality of LEDs 4A to 4C light up corresponding to the power supply being used. The user can grasp the power supply being used based on the lighting states of the LEDs 4A to 4C.

The display unit 4 is an LED 4D that can emit a plurality of colors. The LED 4D lights up in a color corresponding to the power supply being used, among a plurality of colors. The user can grasp the power supply being used based on the color of the LED4D.

The CPU 21 determines the printing speed, which is the speed at which printing is executed on the medium M, based on the detected temperature t of the battery 29 . The CPU 21 decreases the printing speed as the detected temperature t of the battery 29 decreases. When the battery 29 is connected to the battery mounting portion 34 and the AC adapter 30 is not connected to the AC adapter jack 32 , the CPU 21 controls whether the battery 29 is connected to the battery mounting portion 34 and the AC adapter is connected. Determine the print speed to be faster or the same when 30 is connected to AC adapter jack 32 . In the printing apparatus 1 described above, when the temperature t of the battery 29 decreases, the power that the battery 29 can supply decreases. Even when the temperature t of the battery 29 is low, the printer 1 drives the head 10 with at least part of the first power of the battery 29 and drives the transport motor 9 with at least part of the second power of the AC adapter 30. do. Therefore, when the temperature t of the battery 29 is low, the printing apparatus 1 can print faster than when the head 10 and the transport motor 9 are driven by the battery 29 alone.

When the battery 29 is connected to the battery mounting portion 34 and the AC adapter 30 is connected to the AC adapter jack 32, the CPU 21 activates a power suppression mode in which at least part of the first power supplied by the battery 29 is suppressed. Decide whether to execute or not. When the CPU 21 determines to execute the power reduction mode, the CPU 21 limits the number of ON dots that can simultaneously heat the plurality of heating elements of the head 10 . The printer 1 can reduce the first power supplied by the battery 29 by limiting the number of on-dots that can be heated simultaneously.

The printing system 300A will be described with reference to FIG. In the following description, configurations having the same functions as those of the above-described embodiment are denoted by the same reference numerals, and descriptions thereof are omitted or simplified. The printing system 300A is composed of the printing device 1 of the above-described embodiment and a medium feeding device 200A. In the printing system 300A, the printing device 1 prints on the medium M supplied by the medium supplying device 200A.

The medium feeding device 200A has an interface 213 and a transport motor 209 . The interface 213 of the medium feeding device 200A is connected to the interface 13 of the printing device 1 . The medium feeding device 200A is driven by a command from the printing device 1. FIG.

The power supply circuit 100 supplies at least part of the first power to the head 10 when the battery 29 is connected to the battery mounting portion 34 and the AC adapter 30 is connected to the AC adapter jack 32 . In this case, the power supply circuit 100 supplies at least part of the second power to the transport motor 9 and also to the transport motor 209 of the medium feeding device 200A via the interfaces 13 and 213 . That is, the power supply circuit 100 of the printing apparatus 1 transmits power to the carry motor 209 via the interfaces 13 and 213 . The printing system 300A can efficiently use the first power of the battery 29 and the second power of the AC adapter 30 to drive the printing device 1 and the medium feeding device 200A. As a result, the printing system 300A does not need a large power supply for driving the medium feeding device 200A. Furthermore, the printing system 300A can use two power supplies to increase the printing speed.

The printing system 300B will be described with reference to FIG. In the following description, configurations having the same functions as those of the above-described embodiment are denoted by the same reference numerals, and descriptions thereof are omitted or simplified. A printing system 300B is composed of the printing apparatus 1 of the above embodiment and a medium feeding apparatus 200B. In the printing system 300B, the printing device 1 prints on the medium M supplied by the medium supplying device 200B.

The medium feeding device 200B has an AC adapter jack 232. FIG. The AC adapter 30 is connected to the AC adapter jack 232 of the medium feeding device 200B. Note that the AC adapter 30 may be different from that in the above embodiment.

When the battery 29 is connected to the battery mounting portion 34 , the power supply circuit 100 supplies at least part of the first power to the head 10 and the transport motor 9 . When the AC adapter 30 is connected to the AC adapter jack 232 , the medium feeder 200B supplies at least part of the second power to the transport motor 209 . In the printing system 300B, the battery 29 and the AC adapter 30 drive the printing device 1 and the medium feeding device 200B, respectively. Therefore, the printing system 300B can drive the printing device 1 and the medium feeding device 200B without enlarging the printing device 1 .

In the above embodiment, the battery mounting portion 34 corresponds to the "first connection portion" of the present invention. The battery 29 corresponds to the "first power source" of the present invention. The AC adapter jack 32 corresponds to the "second connecting portion" of the present invention. The AC adapter 30 corresponds to the "second power supply" of the present invention. The USB jack 33 corresponds to the "third power source" of the present invention. 21 A of power supply detection parts correspond to the "detection part" of this invention. The interfaces 13 and 213 correspond to the "transmission section" of the present invention. The process of S13 executed by the CPU 21 corresponds to the "acquisition means" of the present invention. The processing of S207, S211, S213, S219, S221, S227, S229, S233, and S235 executed by the CPU 21 corresponds to the "determining means" of the present invention. The processing of S217, S225, and S231 executed by the CPU 21 corresponds to the "determining means" of the present invention. The processing of S221, S229, and S235 executed by the CPU 21 corresponds to the "limiting means" of the present invention.

A power supply circuit 100A of a modification will be described with reference to FIG. The power supply circuit 100A differs from the power supply circuit 100 of the above embodiment in that it does not include the USB jack 33, the diode D5, and the fifth wiring L5. Even in such a case, the printing apparatus 1 can be driven with a single power supply from the battery 29 or the AC adapter 30 . Furthermore, the printing apparatus 1 can be driven by multiple power sources, such as the battery 29 and the AC adapter 30 .

A power supply circuit 100B of a modification will be described with reference to FIG. The power supply circuit 100B differs from the power supply circuit 100A in that it includes a fourth switching section SW4 and a sixth wiring L6. Further, when the power supply circuit 100B is used, the head 10 has two supply units for supplying power. Parts of the head 10 that are supplied by two systems of supply units are referred to as a first part and a second part, respectively.

The fourth switching section SW4 is electrically connected between the AC adapter jack 32 of the first wiring L1 and the first switching section SW1. The fourth switching section SW4 is electrically connected to the drive circuit 12 . A sixth wiring L6 is a wiring that connects the AC adapter jack 32 and the head 10 .

A case where the power adjustment unit 21C turns on the first switching unit SW1, the second switching unit SW2, and the fourth switching unit SW4 and turns off the third switching unit SW3 will be described. In this case, the printing apparatus 1 is driven by a single power supply of only the AC adapter 30 . In this case, at least part of the second power supplied from the AC adapter 30 is supplied to the drive circuit 12 via the first wiring L1 and the sixth wiring L6. The drive circuit 12 supplies the first portion of the head 10 with the second power supplied through the first wiring L1. The drive circuit 12 can supply second power to the second portion of the head 10 via the sixth wiring L6. In this case, at least part of the second power supplied from the AC adapter 30 is supplied to the transport motor 9 via the second wiring L2. At least part of the second power supplied from the AC adapter 30 may be supplied to the transport motor 9 via the first wiring L1, the third wiring L3, and the second wiring L2.

A case where the fourth switching section SW4 and the third switching section SW3 are turned on by the power adjusting section 21C and the first switching section SW1 and the second switching section SW2 are turned off will be described. In this case, the printing apparatus 1 is driven by multiple power sources such as the battery 29 and the AC adapter 30 . That is, the battery 29 is connected to the battery mounting portion 34 and the AC adapter 30 is connected to the AC adapter jack 32 . In this case, the power supply circuit 100B supplies at least part of the first power to the first portion of the head 10 via the fourth wiring L4 and the first wiring L1. The power supply circuit 100B supplies at least part of the first power to the transport motor 9 via the fourth wiring L4 and the third wiring L3. The power supply circuit 100B supplies at least part of the second power to the second portion of the head 10, which is different from the first portion, via the sixth wiring L6. As a result, the printing apparatus 1 can efficiently use a plurality of power sources without increasing the size. The power supply circuit 100</b>B may be connected to the USB power supply section 31 instead of the AC adapter 30 .

The present invention can be further modified from the above embodiments. It should be noted that the techniques disclosed in the above embodiments and modifications below may be combined without contradiction. Although the printing apparatus 1 executes printing on thermal type cut paper, the present invention is not limited to this. For example, the printing device 1 may be a thermal transfer printer or an inkjet printer.

Although it is driven by three power sources, the battery 29, the AC adapter 30, and the USB power supply unit 31, it is not limited to this. For example, the printing device 1 may be connectable to two or less power sources. Also, the printing apparatus 1 may be connectable to four or more power sources.

In the above embodiment, it is assumed that either the AC adapter 30 or the USB power supply unit 31 is connected, but this is not the only option. For example, both the AC adapter 30 and the USB power supply section 31 may be connectable at the same time. That is, the battery 29, the AC adapter 30, and the USB power supply section 31 may be connected to the printer 1 at the same time.

For example, in the power supply circuit 100 , the battery 29 is connected to the battery loading section 34 , the AC adapter 30 is connected to the AC adapter jack 32 , and the USB power supply section 31 is connected to the USB jack 33 . In this case, the CPU 21 may supply at least part of the first power to the head 10 and at least part of the second power to the transport motor 9 . The printer 1 preferentially uses the battery 29 and the AC adapter 30 when the battery 29, the AC adapter 30, and the USB power supply unit 31 are connected. The printing device 1 does not spend time selecting a power supply. Therefore, the printing apparatus 1 can be speeded up.

In the above embodiment, the power supply circuit 100 supplies at least a portion of the first power of the battery 29 to the head 10 and at least a portion of the second power of the AC adapter 30 to the transport motor 9, but this is not the only option. do not have. For example, the power supply circuit 100 may determine each power supply destination based on the power consumed by the head 10 and the transport motor 9 .

That is, the power supply circuit 100 supplies one of at least part of the first power and at least part of the second power of the battery 29 based on the power consumed by the head 10 and the transport motor 9 . It may be supplied to one of the transport motors 9 . In this case, the power supply circuit 100 supplies the other of at least part of the first power and at least part of the second power to the head 10 and the transport motor 9 based on the power consumed by the head 10 and the transport motor 9 . 9 may be supplied to the other.

In this case, the printing apparatus 1 efficiently supplies the first power of the battery 29 and the second power of the AC adapter 30 to the head 10 and the transport motor 9 based on the power consumed by the head 10 and the transport motor 9 . can. Therefore, the printer 1 does not need to increase the size of each power supply to drive the head 10 and the transport motor 9 . Therefore, the printing apparatus 1 can be prevented from becoming large.

Further, the power supply circuit 100 preferably supplies the power of the power source, which can supply more power, between the battery 29 and the AC adapter 30 to the head 10 and the transport motor 9, which consumes more power. Also, the power supply circuit 100 preferably supplies the power of the power source, which can supply less power, between the battery 29 and the AC adapter 30 to the head 10 and the transport motor 9, which consumes less power. The printing apparatus 1 can supply the power of the power supply capable of supplying a large amount of power to the one that consumes a large amount of power. In addition, the printing apparatus 1 can supply the power of the power supply capable of supplying a small amount of power to the side that consumes less power.

More specifically, the power supply circuit 100 supplies at least part of the first power of the battery 29 to the transport motor 9 when the power consumed by the transport motor 9 is lower than the power consumed by the head 10, and At least part of the second power of the AC adapter 30 may be supplied to the head 10 .

Although the first power is greater than the second power in the above embodiment, the present invention is not limited to this. For example, the first power may be lower than the second power. In this case, the power supply circuit 100 may determine the power supply destination according to the power required by the head 10 and the transport motor 9 . The magnitude relationship between the first power, the second power, and the third power may be changed as appropriate.

The voltages output by the battery 29, the AC adapter 30, and the USB power supply unit 31 of the above embodiment may be changed as appropriate. The first to fifth thresholds may be changed as appropriate. For example, the first to fifth thresholds may all be different values or the same value.

In the above embodiment, when the voltage output from the battery 29 is equal to or higher than the first threshold, it is determined that the battery 29 can be used, but the present invention is not limited to this. Other values may be used as thresholds instead of the first threshold.

Although the temperature sensor 25 detects the temperature t of the battery 29 in the above embodiment, the present invention is not limited to this. The printing apparatus 1 may include sensors that detect temperatures of the AC adapter 30 and the USB power supply unit 31, respectively. In this case, the CPU 21 may determine that the power supplies whose temperatures t detected by the sensors are within a predetermined temperature range are usable power supplies.

In the above embodiment, the usable power supply is determined based on the voltages that can be supplied by a plurality of power supplies, but the present invention is not limited to this. For example, the CPU 21 may determine the usable power supply based on the currents that can be supplied by a plurality of power supplies. In this case, the CPU 21 obtains the current required to drive the head 10 and the transport motor 9 . The CPU 21 determines whether or not the power supply can be used based on whether or not a plurality of power supplies can supply the current required to drive the head 10 and the transport motor 9 . The CPU 21 determines that a power supply that can supply a larger current than the current required to drive the head 10 and the current required to drive the transport motor 9 is a usable power supply, among the plurality of power supplies. The printing apparatus 1 can determine whether the power supply is usable based on the suppliable current.

When the current that can be supplied by the USB power supply unit 31 is larger than the current required to drive the carry motor 9 and the voltage output by the USB power supply unit 31 is equal to or higher than the sixth threshold, the CPU 21 turns off the power supply of the USB power supply unit 31. may be supplied to the transport motor 9 and the first power from the battery 29 may be supplied to the head 10 . Further, when the current that can be supplied by the USB power supply unit 31 is smaller than the current required to drive the transport motor 9 and the voltage output by the USB power supply unit 31 is smaller than the sixth threshold, the CPU 21 causes the battery 29 to A first power may be supplied to the head 10 and the transport motor 9 . The printing apparatus 1 can control power supply based on the current and voltage that can be supplied by the battery 29 , AC adapter 30 , and USB power supply section 31 . Note that the value of the sixth threshold may be set as appropriate.

Although either the AC adapter 30 or the USB power supply unit 31 is used in the above embodiment, they may be used simultaneously. In this case, the second power or the third power may be used to charge the battery 29 . For example, when the CPU 21 determines that the battery 29 is an unusable power source and the AC adapter 30 and the USB power supply unit 31 are usable power sources, at least part of the second power from the AC adapter 30 is , the head 10 and the transport motor 9. In this case, the CPU 21 may supply at least part of the third power, which is the power from the USB power supply section 31 , to the battery 29 . As a result, the printer 1 can perform printing while charging the battery 29 .

In the above embodiment, four LEDs 4A to 4D are provided as the display unit 4, but the number is not limited to this. For example, the number of LEDs may be three or less, or five or more. Although LED4A to LED4C are used in the first pattern, the present invention is not limited to this. In the first pattern, for example, LED4B-LED4D may be used. In the second pattern, LED4D was used, but it is not limited to this. For example, any of LEDs 4A-4C may be used.

Although the display unit 4 displays the power supply being used to the user by the lighting pattern of the LEDs 4A to 4C, the present invention is not limited to this. For example, a usable power source may be identified by a combination of lighting patterns of the two LEDs 4A and 4C. Moreover, although the usable power supply is displayed to the user by the color of the LED 4C, the present invention is not limited to this. For example, it may be possible to identify a usable power supply according to the blinking speed of the LED 4A.

Although the display unit 4 has LEDs 4A to 4C, it is not limited to this. for example. A display may be provided to indicate available power sources, such as in text. In addition, the display unit 4 may notify the user of available power sources by voice.

Although the printing speed is determined based on the table T in the above embodiment, the present invention is not limited to this. As for the printing speeds shown in Table T, speeds A to D may be appropriately changed according to the specifications of the power supply, for example. The printing speed when the AC adapter 30 is driven by a single power supply and the printing speed when the USB power supply unit 31 is driven by a single power supply may be different. The printing speed in power saving mode does not have to be the same speed as in the case of driving with only the battery 29 as a single power source. In other words, the printing speed in the power saving mode should be slower than that in the high speed mode. Accordingly, the number of on-dots may be appropriately limited.

Note that a microcomputer, ASIC, FPGA (Field Programmable Gate Array), or the like may be used as the processor instead of the CPU 21 . The main processing may be distributed by multiple processors. The printing unit 3 may include other non-temporary storage media such as flash memory and HDD. The non-temporary storage medium may be any storage medium that can retain information regardless of the information storage period. Non-transitory storage media may not include transitory storage media (eg, transmitted signals).

Various programs may be downloaded (that is, transmitted as a transmission signal) from a server connected to a network (not shown), and stored in a flash memory, HDD, or the like. In this case, various programs may be stored in a non-temporary storage medium such as an HDD provided in the server.

1 printing device 9, 209 conveying motor 10 head 13, 213 interface 21 CPU
21A Power supply detection unit 29 Battery 30 AC adapter 31 USB power supply unit 32 AC adapter jack 33 USB jack 34 Battery mounting unit 100 Power supply circuit 200A, 200B Medium supply device 300A, 300B Printing system

Claims (23)

A printing system that can be driven by a plurality of power supplies,
a head for printing on a medium;
a transport motor that generates power for transporting the medium;
a first connection section to which a first power supply can be connected;
a second connection section to which a second power supply can be connected;
[0] comprising a power supply circuit that supplies power to the head and the transport motor;
The power supply circuit is
When the first power supply is connected to the first connection and the second power supply is connected to the second connection,
supplying at least part of the first power, which is the power of the first power supply, to the head;
A printing system, wherein at least part of the second power, which is the power of the second power supply, is supplied to the transport motor. The power supply circuit is
2. The printing system according to claim 1, wherein at least part of said first power is supplied to said head and at least part of said second power is supplied to said transport motor simultaneously. The power supply circuit is
When the first power supply is connected to the first connection and the second power supply is connected to the second connection,
supplying at least a portion of the first electric power to the first portion of the head and the transport motor;
2. The printing system of claim 1, wherein at least a portion of said second power is supplied to a second portion of said head that is different from said first portion. The power supply circuit supplies at least part of the first power to the head when the first power supply is connected to the first connection and the second power supply is not connected to the second connection. 2. A printing system according to claim 1, wherein said conveying motor is supplied. The power supply circuit supplies at least part of the second power to the head when the second power supply is connected to the second connection and the first power supply is not connected to the first connection. 2. A printing system according to claim 1, wherein said conveying motor is supplied. 2. The printing system of claim 1, wherein said first power is greater than said second power. the first power source is a battery,
2. The printing system according to claim 1, wherein said second power supply is an AC adapter. Equipped with a third connection to which a third power supply can be connected,
In the power supply circuit, when the first power supply is connected to the first connection part and the third power supply is connected to the third connection part,
supplying at least a portion of the first power to the head;
2. The printing system according to claim 1, wherein at least part of the third power, which is the power of the third power supply, is supplied to the transport motor. The power supply circuit has the first connection portion connected to the first power source, the second connection portion connected to the second power source, and the third connection portion connected to the third power source. case,
supplying at least a portion of the first power to the head;
9. A printing system according to claim 8, wherein at least part of said second power is supplied to said transport motor. 10. The printing system according to claim 8, wherein said third power supply is a USB power supply unit. The power supply circuit is
a first wiring that electrically connects the second connection portion and the head;
a first switching unit for switching between a conductive state and a non-conductive state of the first wiring;
a second wiring that electrically connects the second connection portion and the conveying motor;
a second switching unit for switching between a conductive state and a non-conductive state of the second wiring;
A second wiring electrically connected between the first switching portion of the first wiring and the head and electrically connected between the second switching portion of the second wiring and the transport motor. three wires and
a third switching unit for switching between a conductive state and a non-conductive state of the third wiring;
2. The apparatus according to claim 1, further comprising a fourth wire connected to said first connection portion and electrically connecting between said first switching portion and said head among said first wires. printing system. Equipped with a third connection to which a third power supply can be connected,
The power supply circuit includes a fifth wire connected to the third connection portion and electrically connected between the second connection portion and the first switching portion of the first wires. 12. The printing system of claim 11, wherein: The power supply circuit is
a first bleeder circuit that is connected to the first wiring, the fifth wiring, and the ground, and discharges electric charges generated in the third connection portion to which the third power supply is not connected;
a first bleeder resistor connected to the first bleeder circuit and connected to the fifth wiring;
a second bleeder circuit that is connected to the first wiring, the fifth wiring, and the ground, and discharges electric charges generated in the second connection portion to which the second power supply is not connected;
13. A printing system according to claim 12, further comprising a second bleeder resistor connected to said second bleeder circuit and connected to said first wiring. 2. The printing system according to claim 1, further comprising a detection unit that detects whether a usable power supply is connected by detecting voltages of the plurality of power supplies. 2. The printing system according to claim 1, further comprising a display section for displaying information about which of the plurality of power sources is being used. The display unit is a plurality of LEDs provided corresponding to the plurality of power sources,
16. The printing system of claim 15, wherein the plurality of LEDs light up corresponding to the power supply being used. The display unit is an LED capable of emitting a plurality of colors,
16. The printing system of claim 15, wherein the LED lights in a color corresponding to the power supply being used, among the plurality of colors. A printing system capable of driving power from a plurality of power sources,
a head for printing on a medium;
a transport motor that generates power for transporting the medium;
a first connection section to which a first power supply can be connected;
a second connection section to which a second power supply can be connected;
a power supply circuit that supplies power to the head and the transport motor;
The power supply circuit is
When the first power supply is connected to the first connection and the second power supply is connected to the second connection,
One of at least a portion of the first power, which is the power of the first power supply, and at least a portion of the second power, which is the power of the second power supply, based on the power consumed by the head and the transport motor. to one of the head and the transport motor,
At least part of the first power and at least part of the second power are supplied to the other of the head and the transport motor based on the power consumed by the head and the transport motor. A printing system characterized by: The power supply circuit is
supplying the power of the power supply that can supply larger power out of the first power supply and the second power supply to the one of the head and the transport motor that consumes larger power,
18. The power of the power supply that can supply less power out of the first power supply and the second power supply is supplied to the one of the head and the transport motor that consumes less power. The printing system described in . The printing system includes:
a printing device having at least the head, the transport motor, the power supply circuit, the first connection portion, and the second connection portion;
a medium supply device that supplies the medium to the printing device;
a transmission unit that transmits the power from the power supply circuit of the printing device to the medium feeding device;
The power supply circuit is
When the first power supply is connected to the first connection and the second power supply is connected to the second connection,
supplying at least a portion of the first power to the head;
2. A printing system according to claim 1, wherein at least part of said second power is supplied to said transport motor and to said medium feeding device via said transmission section. The printing system includes:
a printing apparatus having at least the head, the transport motor, the first connection section, and the power supply circuit;
a medium supply device having the second connection portion and supplying the medium to the printing device;
when the first power source is connected to the first connecting portion, the power supply circuit supplies at least part of the first power to the head and the transport motor;
2. The printing system according to claim 1, wherein when said second power supply is connected to said second connection, at least part of said second power is supplied to said media feeder. acquisition means for acquiring the temperature of the first power supply;
determining means for determining a printing speed, which is a speed at which printing is executed on the medium, based on the temperature of the first power supply acquired by the acquiring means;
The determining means is
As the temperature of the first power supply acquired by the acquisition means decreases, the printing speed is decreased, and the first power supply is connected to the first connection section, and the second power supply is connected to the second Faster when the first power supply is connected to the first connection and the second power supply is connected to the second connection than when not connected to the connection, or 2. The printing system of claim 1, wherein the printing speed is determined to be the same. When the first power supply is connected to the first connection and the second power supply is connected to the second connection, at least part of the first power supplied by the first power supply is suppressed. a judgment means for judging whether or not to execute the power suppression mode to
2. The printing apparatus according to claim 1, further comprising limiting means for limiting the number of on-dots that can simultaneously heat the plurality of heating elements of the head when the determining means determines to execute the power suppression mode. system.

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