Electronic device

Abstract

To provide an electronic device configured to reduce the influence of heat generation of a power supply circuit on other components, the power supply circuit generating heat when supplying electric power to an external device with USB PD.SOLUTION: An electronic device includes: a substrate; a main body case; and a first locking member and a second locking member for fixing the substrate and the main body case. The substrate includes a first receptacle connector configured to be coupled to a first plug of a first cable, a second receptacle connector configured to be coupled to a second plug of a second cable, a first coil that supplies electric power to the first receptacle connector, and a second coil that supplies electric power to the second receptacle connector. A distance L1 from the first locking member to the first coil is shorter than a distance L2 from the first locking member to the first receptacle connector. A distance L3 from the second locking member to the second coil is shorter than a distance L4 from the second locking member to the second receptacle connector.SELECTED DRAWING: Figure 17

Description

Technical Field

[0001] The present invention relates to an electronic device.

Background Art

[0002] Conventionally, an electronic device having a printing unit that can print on a medium such as paper is known. Such an electronic device includes a USB (Universal Serial Bus) interface for connecting the electronic device to an external device or the like. The USB interface is equipped with, for example, a USB-Type-A receptacle connector for connecting an external device that transmits data instructing execution of printing and a printing device that receives this data and executes printing, and a LAN receptacle connector for connecting the printing device to a network.

[0003] In recent years, there has been an increasing demand for a printing device that can not only perform data communication with an external device and connect to a network, but also exchange power with the connected external device. Patent Document 1 discloses a printing device that can supply power to a connected external device via a USB-Type-C interface.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when the USB-Type-C interface mounted on the printing device described in Patent Document 1 conforms to the USB PD (Power Delivery) standard, heat is generated in the power supply circuit that supplies power to the USB-Type-C interface when supplying power to an external device connected to this USB-Type-C interface, which may affect other components.

Means for Solving the Problem

[0006] One aspect of the electronic device according to the present invention is a substrate, a main body case, a first locking member and a second locking member for fixing the substrate and the main body case, and includes The substrate is a first receptacle connector connectable to a first plug of a first cable, a second receptacle connector connectable to a second plug of a second cable, a first coil for supplying power to the first receptacle connector, a second coil for supplying power to the second receptacle connector, and is provided with The first receptacle connector is a first USB-Type-C receptacle connector, The second receptacle connector is a second USB-Type-C receptacle connector, The first cable is a first USB-Type-C cable, The second cable is a second USB-Type-C cable, The distance L1 from the first locking member to the first coil is shorter than the distance L2 from the first locking member to the first receptacle connector, The distance L3 from the second locking member to the second coil is shorter than the distance L4 from the second locking member to the second receptacle connector.

Brief Description of the Drawings

[0007]

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DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The drawings used are for convenience of explanation. Note that the embodiments described below do not unduly limit the content of the present invention described in the claims. Also, not all of the configurations described below are essential constituent elements of the present invention.

[0009] 1. This Embodiment 1-1. Schematic Configuration of Printing System FIG. 1 is a diagram showing a schematic configuration of a printing system 1 according to this embodiment. Such a printing system 1 is used, for example, in a store and has functions of performing accounting according to products, services, etc. purchased by customers, notifying customers of information related to accounting, and issuing receipts according to accounting. For example, the printing system 1 is an example of a POS (Point of Sale) system.

[0010] The printing system 1 includes a printing device 2, a smart device 3a, a customer display 3b, and a handy scanner 3c. Note that the printing system 1 may have a configuration in which some of these elements are omitted or modified, or other elements are added.

[0011] The printing device 2 is connected to, for example, a commercial AC power supply (not shown) via a power cable 5, and thus power is supplied. The printing device 2 to which power is supplied performs printing on a medium P, and this medium P is discharged from a medium discharge port 13. That is, the printed recording portion of the medium P is discharged from the medium discharge port 13.

[0012] The smart device 3a, the customer display 3b, and the handy scanner 3c are examples of external devices that can be connected to the printing device 2 via a USB interface 60 provided in the printing device 2 as described later. Specifically, the smart device 3a is connected to the printing device 2 via a USB cable 4a, the customer display 3b is connected to the printing device 2 via a USB cable 4b, and the handy scanner 3c is connected to the printing device 2 via a USB cable 4c.

[0013] In FIG. 1, an example in which the smart device 3a, the customer display 3b, and the handy scanner 3c are connected to the printing device 2 is shown, but the number of external devices that can be connected to the printing device 2 is not limited to three. For example, the number of external devices that can be connected to the printing device 2 depends on the USB standard. In the USB standard, the maximum number of external devices that can be connected is 127, so the maximum number of external devices that can be connected to the printing device 2 is 127.

[0014] The smart device 3a is a terminal that can be carried by a user. For example, the smart device 3a is a tablet terminal or a smartphone, and the smart device 3a includes a communication unit that communicates data according to a predetermined communication standard, and communicates with the printing device 2 via this communication unit.

[0015] Here, unless otherwise specified, the user refers to a store clerk who provides goods or services to customers, or a vendor who installs the printing system 1 in a store and configures external devices such as the printing device 2 and the smart device 3a.

[0016] The smart device 3a is equipped with a battery and operates on the power charged in the battery. The smart device 3a is supplied with power from the printing device 2 to charge the battery. Also, the smart device 3a is equipped with various applications that generate commands related to controlling the printing device 2, printing data, etc. For example, an application installed on such a smart device 3a is an application compatible with the POS system.

[0017] The smart device 3a transmits commands related to control and commands related to printing to the printing device 2. When the printing device 2 receives these commands, it stores them in a reception buffer (not shown).

[0018] Commands related to control include, for example, a setting command that instructs format setting and a status request command that instructs a request for information regarding the status of the printing device 2. In response to this status request command, for example, the printing device 2 transmits information indicating that printing has been completed to the smart device 3a.

[0019] Commands related to printing include, for example, a printing command that instructs printing, a line feed command that instructs a line feed, a line feed command that instructs a carriage return, a cutter command that instructs cutting of the medium P, etc. Commands related to printing include commands that instruct driving of any of the thermal head 21, the conveyance unit 23, and the cutting unit 24 shown in FIG. 2.

[0020] The smart device 3a generates print data such as characters and images printed by the printing device 2. The smart device 3a transmits a print command including the generated print data to the printing device 2 according to a predetermined communication standard. The printing device 2 executes the print command and prints characters, images, etc. on the medium P based on the print data.

[0021] The customer display 3b can be used, for example, on the counter table in a store. A customer who has purchased a product in the store can check the amount displayed on the customer display 3b and recognize the payment amount. Also, the customer display 3b may display the name of the product purchased by the customer, the payment method, the purchase date and time, the name of the store where the purchase was made, etc.

[0022] For example, when a customer makes an accounting and payment for purchased items by himself / herself, such as in a so-called self-checkout, the user, the store clerk, may omit the customer display 3b from the printing system 1. In this case, it is preferable that the content displayed on the customer display 3b is displayed on the smart device 3a.

[0023] For example, it is preferable that the name of the product purchased by the customer, the payment method, the purchase date and time, the name of the store where the purchase was made, etc. are displayed on the smart device 3a. In this way, the user, the store clerk, can omit the customer display 3b according to the situation, reduce external devices, thereby suppressing the power consumption of the printing system 1 and simplifying the configuration of the printing system 1.

[0024] The handy scanner 3c operates by receiving power supply from the printing device 2. The printing device 2 inputs information regarding the image scanned by the handy scanner 3c.

[0025] For example, the user uses the handy scanner 3c to scan the barcode attached to the product. The information regarding the scanned image is output to the smart device 3a via the printing device 2. The smart device 3a can acquire information regarding the product, information regarding the amount, etc.

[0026] Also, for example, a store clerk as a user scans a barcode presented by a customer using a smartphone or the like with a handy scanner 3c. Information regarding the scanned image is output to the smart device 3a via the printing device 2.

[0027] The smart device 3a can acquire information regarding the payment method, information regarding the payment amount, and the like. Based on this information, the smart device 3a may complete the payment of the fee via an online payment service and display information regarding the completion of the payment on the customer display 3b via the printing device 2. Thereby, the customer can confirm the completion of the payment.

[0028] 1-2. Functions of the Printing System With reference to FIG. 2, the functional configuration of the printing system 1 will be described. FIG. 2 is a block diagram of the printing system 1.

[0029] The printing system 1 includes external devices 10a, 10b, 10c, 10d, 10e, and a printing device 2. Note that the above-described smart device 3a, customer display 3b, and handy scanner 3c are examples of the external devices 10a, 10b, 10c, 10d, and 10e.

[0030] The printing device 2 includes a display unit 11, a power supply circuit 12, a media discharge port 13, a printing unit 20, and a control unit 30.

[0031] The display unit 11 includes, for example, a plurality of LEDs. The display unit 11 is electrically connected to the control unit 30 and is controlled by the control unit 30. The display unit 11 displays information regarding the state of the printing device 2, for example, by blinking the LEDs. Note that the display unit 11 may be a liquid crystal display device.

[0032] The power supply circuit 12 can supply power to the display unit 11, the printing unit 20, and the control unit 30. The power supply circuit 12 is connected to, for example, a commercial AC power supply and can convert the power supplied from the commercial AC power supply into appropriate power and supply it to each unit.

[0033] The power supply circuit 12 includes, for example, a DC-DC converter, a resistive element, a switching element, and a transistor. The power supply circuit 12 can supply power to external devices 10a, 10b, 10c, 10d, and 10e that are electrically connected to the printing apparatus 2 via the USB interface 60. For example, the power supply circuit 12 can supply power to a smart device 3a, a customer display 3b, and a handy scanner 3c.

[0034] The printing unit 20 includes a thermal head 21 and a print head driving unit 22. The printing unit 20 is also electrically connected to a conveyance unit 23 and a cutting unit 24. The conveyance unit 23 has conveyance rollers (not shown), and the cutting unit 24 has a cutter including a first blade and a second blade. The first blade is a movable blade that moves between a standby position and a cutting position, and the second blade is a fixed blade that meshes with the first blade moving to the cutting position to cut the recording paper. The printing unit 20 is electrically connected to the power supply circuit 12 and operates by receiving power supply from the power supply circuit 12. The printing unit 20 is also controlled by the control unit 30. Further, the printing unit 20 executes printing on the medium P based on, for example, print data output from a smart device 3a, which is an example of an external device. In this way, an example of an electronic device including the printing unit 20 that performs printing on the medium P is the printing apparatus 2.

[0035] The thermal head 21 has a number of heating elements 25. The number of heating elements 25 are arranged in a direction orthogonal to the conveyance direction of the thermal roll paper 26 which is the medium P. When the heating elements 25 are energized, heat is applied to the printing surface of the thermal roll paper 26. Thereby, the thermal head 21 can print characters, images, etc. on the thermal roll paper 26. Note that the portion pulled out from the thermal roll paper 26 may be described as the recording paper. Further, the printing unit 20 is not limited to printing by the thermal head 21, and may perform printing by an inkjet method, an impact dot matrix method, or a laser method. The medium P is not limited to the thermal roll paper 26, and may be a sheet of paper, a label paper, or the like.

[0036] The print head drive unit 22 is controlled by the control unit 30 to control the energization of the heating elements 25 of the thermal head 21. The conveyance unit 23 is controlled by the control unit 30 to rotate the conveyance roller and convey the thermal roll paper 26. The cutting unit 24 is controlled by the control unit 30 to drive the first blade to slide toward the second blade and cut the thermal roll paper 26.

[0037] FIG. 3 is a block diagram of the control unit 30 of the printing apparatus 2. As shown in FIG. 3, the control unit 30 includes a CPU (Central Processing Unit) 31, a RAM (Random Access Memory) 32, a ROM (Read only memory) 33, a USB controller 34, a nonvolatile memory 35, a wireless communication unit 36, a USB communication unit 50, a BUS-IF 37, a device IF 38, and an image processing unit 39. The CPU 31 is an example of a control circuit. Although the CPU is exemplified as an example of the control circuit, the control circuit may be configured to include hardware such as an FPGA (Field Programmable Gate Array) instead of or in addition to the CPU.

[0038] The CPU 31 controls the main control of the printing apparatus 2. The CPU 31 is electrically connected to the RAM 32, ROM 33, USB controller 34, non-volatile memory 35, wireless communication unit 36, USB communication unit 50, and BUS-IF 37 via the system bus 41.

[0039] The RAM 32 is a randomly readable and writable memory for providing a working area for the CPU 31. The RAM 32 can also be used as an image memory for temporarily storing image data. The ROM 33 is a boot ROM and stores the system boot program. The non-volatile memory 35 stores system software, setting value data, etc. that need to be retained even after the power of the printing apparatus 2 is turned off.

[0040] The USB controller 34 controls the USB interface 60 via the system bus 41. That is, the USB controller 34 controls the external devices 10a, 10b, 10c, 10d, and 10e connected to the USB interface 60. For example, the USB controller 34 may be configured to include hardware such as a SoC (System on a chip).

[0041] The wireless communication unit 36 can be connected to an external device using wireless communication. The wireless communication unit 36 can communicate with an external device in accordance with standards such as Wi-Fi (registered trademark) and Bluetooth (registered trademark), for example. The BUS-IF 37 is an interface that electrically connects the system bus 41 and the image bus 42. The BUS-IF 37 can operate as a bus bridge that converts data structures.

[0042] In addition to the BUS-IF 37, a device IF 38 and an image processing unit 39 are electrically connected to the image bus 42. The device IF 38 is an interface that connects the control unit 30, the printing unit 20, and the display unit 11. The device IF 38 can perform synchronous and asynchronous conversions of data. The image processing unit 39 can execute predetermined processing on the data related to printing output to the printing unit 20.

[0043] 1-3.USB interface Fig. 4 is a block diagram of the USB communication unit 50 and the USB interface 60. Figs. 5 to 9 are diagrams showing each interface included in the USB interface 60. As shown in Fig. 4, the USB communication unit 50 includes the USB interface 60, a USB hub 53, and a PD controller 54.

[0044] The USB hub 53 is electrically connected to the USB interface 60. The USB hub 53 receives instructions from the USB controller 34 via the system bus 41, and operates between the USB controller 34 and the USB interface 60. For example, the USB hub 53 may be configured to include hardware such as an integrated circuit. The USB hub 53 also plays the role of a line concentrator or relay device in the USB network.

[0045] The PD controller 54 supplies power conforming to the USB PD (Power Delivery) standard described later to the external device 10a connected to the USB-Type-C interface 60a. The control unit controls the supply of electricity.

[0046] In addition, the USB interface 60 includes USB Type-C interfaces 60a and 60b, USB Type-A interfaces 60c and 60d, and a USB Type-B interface 60e.

[0047] FIG. 4 shows an example in which the USB-Type-C interface 60a is connected to the external device 10a, the USB-Type-C interface 60b is connected to the external device 10b, the USB-Type-A interface 60c is connected to the external device 10c, the USB-Type-A interface 60d is connected to the external device 10d, and the USB-Type-B interface 60e is connected to the external device 10e, but is not limited thereto. The USB interface 60 may include USB interfaces of other standards, such as mini-USB-Type-A and micro-USB-Type-A.

[0048] The power circuit 12 shown in FIG. 3 includes a first power circuit 12a and a second power circuit 12b. The first power circuit 12a supplies power to the USB-Type-C interface 60b, the USB-Type-A interfaces 60c and 60d, and the USB-Type-B interface 60e. Note that the first power circuit 12a may be configured to supply power to the USB hub 53. Also, the first power circuit 12a may be configured not to supply power to the USB-Type-B interface 60e.

[0049] On the other hand, the second power circuit 12b supplies power to the USB-Type-C interface 60a. Note that the second power circuit 12b may be configured to supply power to the PD controller 54.

[0050] Referring to FIG. 5, the USB-Type-C interface 60a will be described. FIG. 5 is a block diagram of the USB controller 34 and the USB-Type-C interface 60a.

[0051] The USB controller 34 includes a device controller 341, a host controller 342, and a DRP (Dual Role Port) controller 343. The USB-Type-C interface 60a is controlled by the DRP controller 343 of the USB controller 34 and the PD controller 54 via the system bus 41.

[0052] The USB-Type-C interface 60a includes a VBUS terminal 61a, D+ / D- terminals 62a, and CC (Configuration Channel) terminals 63a.

[0053] The DRP controller 343 controls data transmission and reception with an external device 10a connected to the USB-Type-C interface 60a. The DRP controller 343 performs data transmission control for transmitting data such as commands related to printing to the CPU 31 via the system bus 41.

[0054] The DRP controller 343 mediates communication between the USB controller 34 and the USB interface 60, for example, by synchronous serial communication. The synchronous serial communication may be, for example, I2C (Inter-Integrated Circuit) communication.

[0055] The PD controller 54 can hold setting information of a power profile indicating the amount of power that the printing apparatus 2 can supply. Based on this power profile setting information, the PD controller 54 can perform boosting or bucking processing on the power supplied from the second power circuit 12b using a regulator (not shown). Thereby, the printing apparatus 2 can supply a desired voltage to the external device 10a via the VBUS terminal 61a. Thus, the printing apparatus 2 can supply a desired voltage to the external device 10a.

[0056] The VBUS terminal 61a is a so-called power input / output terminal. The VBUS terminal 61a is a terminal for exchanging power with the external device 10a. Therefore, power can be received and supplied between the printing apparatus 2 and the external device 10a.

[0057] The D+ / D- terminals 62a are so-called data transmission / reception terminals. The D+ / D- terminals 62 are terminals for transmitting and receiving data signals with the external device 10a. Therefore, data signals can be transmitted and received between the printing apparatus 2 and the external device 10a.

[0058] The CC terminal 63a is a so-called status identification terminal. The CC terminal 63a is a terminal for identifying whether the D+ / D- terminal 62a is in a state capable of receiving a data signal from the external device 10a or in a state capable of transmitting a data signal to the external device 10a. For example, the CC terminal 63a is a terminal for identifying whether the VBUS terminal 61a is in a state capable of receiving power supply from the external device 10a or in a state capable of supplying power to the external device 10a. Therefore, the USB controller 34 can identify the state of the external device 10a.

[0059] Power delivery in the USB-Type-C interface 60a is a standard defined by USB Power Delivery. Hereinafter, USB Power Delivery is abbreviated as USB PD. The second power circuit 12b can supply power corresponding to the USB PD standard to the USB-Type-C interface 60a. For example, the second power circuit 12b generates different voltages such as 5V, 9V, and 12V and supplies a plurality of different voltages to the external device 10a. The second power circuit 12b may be configured to supply a constant current regardless of the voltage supplied to the external device 10a, or may be configured to supply different currents according to the supplied voltage.

[0060] Before starting USB PD, the USB-Type-C interface 60a transmits information regarding the power, direction, and function to be supplied or received between the printing device 2 and the external device 10a. In USB PD, power supply or reception can be executed based on the contract between the connected devices.

[0061] The port that supplies power is the source, and the port that receives power is the sink. A device that functions as a source is a provider, and a device that functions as a sink is a consumer. The USB-Type-C interface 60a can change the amount of power supplied according to the situation and can change the supply or reception of power. For example, when the printing device 2 is the source, the external device 10a connected to the USB-Type-C interface 60a is the sink. Also, when the printing device 2 is the sink, the external device 10a connected to the USB-Type-C interface 60a is the source.

[0062] Next, an example of the power delivery process in the USB-Type-C interface 60a will be described. The source checks the ID of the USB-Type-C cable connected to the USB-Type-C interface 60a and confirms whether it can pass a current exceeding 3A.

[0063] The source notifies the sink of the power profiles it can support. The sink requests the desired profile by number from the supported power profiles notified by the source. The source notifies that it can support the requested power profile. The source then turns on the VBUS terminal 61a to start supplying power to the sink.

[0064] Next, with reference to FIG. 6, the USB-Type-C interface 60b will be described. FIG. 6 is a block diagram of the USB controller 34 and the USB-Type-C interface 60b.

[0065] The USB-Type-C interface 60b includes a VBUS terminal 61b, D+ / D- terminals 62b, and CC terminals 63b.

[0066] The configuration of the USB-Type-C interface 60b is the same as that of the USB-Type-C interface 60a described above. However, unlike the USB-Type-C interface 60a, the USB-Type-C interface 60b is supplied with power from the first power circuit 12a instead of the second power circuit 12b.

[0067] Since the USB-Type-C interface 60b has the CC terminal 63b, similar to the USB-Type-C interface 60a, it is possible to identify the state of the external device 10b to which the USB-Type-C interface 60b is connected. Therefore, the USB-Type-C interface 60b can identify the state of the external device 10b and is capable of power transfer and data transmission and reception.

[0068] However, unlike the USB-Type-C interface 60a, the USB-Type-C interface 60b is supplied with power from the first power circuit 12a and is not controlled by the PD controller 54. For this reason, it is not possible to supply power compliant with the USB PD standard to the external device 10b connected to the USB-Type-C interface 60b. Also, the voltage that the first power circuit 12a can supply to the external device 10b via the USB-Type-C interface 60b is of one type. For example, the first power circuit 12a generates a voltage of 5V and supplies it to the external device 10b. Note that the first power circuit 12a may be configured to supply a constant current to the external device 10b, or may be configured to supply different currents according to the external device 10b connected to the USB-Type-C interface 60b. The first power circuit 12a can supply less power than the second power circuit 12b.

[0069] Since the USB-Type-C interface 60b supplies less power than the USB-Type-C interface 60a, for example, when an external device compatible with a certain USB PD is connected to the USB-Type-C interface 60b, this external device operates according to the power supplied from the USB-Type-C interface 60b. Therefore, the external device 10b connected to the USB-Type-C interface 60b is preferably a device not compatible with USB PD.

[0070] The first power supply circuit 12a has the advantages of lower power consumption and less heat generation compared to the second power supply circuit 12b that supplies power to the USB-Type-C interface 60a compatible with the USB PD standard. Considering the power consumption, functions, etc. of external devices that may be connected to the printing device 2, at least one of the first power supply circuit 12a and the second power supply circuit 12b is preferably compatible with USB PD.

[0071] That is, at least one of the USB-Type-C receptacle connectors 320a and 320b is preferably compatible with USB PD. When there are multiple receptacle connectors compatible with USB-Type-C, at least one of these multiple receptacle connectors is preferably compatible with USB PD.

[0072] Also, at least one of the first power supply circuit 12a and the second power supply circuit 12b is preferably not compatible with USB PD. Among the USB-Type-C receptacle connectors 320a and 320b, at least one is preferably not compatible with USB PD. For example, the first power supply circuit 12a not compatible with USB PD may supply power to, for example, the USB-Type-C receptacle connector 320b and the USB-Type-A receptacle connectors 320c and 320d.

[0073] In such a configuration, since the first power circuit 12a that does not support USB PD supplies power to a plurality of types of receptacle connectors, the power circuits that supply power to the receptacle connectors that do not support USB PD can be shared. As a result, since it is not necessary to increase the power circuits mounted on the substrate 300 shown in FIG. 17, the configuration of the substrate 300 can be simplified. Further, since the configuration of the substrate 300 is simplified, there is an effect that the amount of heat generated in the substrate 300 is reduced.

[0074] For example, when accounting is performed according to the products or services purchased by the customer, etc., the store clerk may operate the external device 10a and the customer may operate the external device 10b. Generally, since the customer has fewer operations required than the store clerk, such as selecting a payment method, it is preferable for the customer to operate an external device having a simpler function than the store clerk. That is, it is preferable for the customer to operate the external device 10b and for the store clerk to operate the external device 10a that consumes more power than the external device 10b.

[0075] Next, with reference to FIG. 7, the USB-Type-A interface 60c will be described. FIG. 7 is a block diagram of the USB controller 34 and the USB-Type-A interface 60c.

[0076] The USB-Type-A interface 60c includes a VBUS terminal 61c and D+ / D- terminals 62c. Different from the above-described USB-Type-C interfaces 60a, 60b, the CC terminals 63a, 63b are omitted. For this reason, the USB-Type-A interface 60c does not have a function of identifying the state of the connected external device 10c.

[0077] The USB-Type-A interface 60c is supplied with power from the first power circuit 12a and supplies power to the external device 10c via the VBUS terminal 61c. For example, the voltage supplied to the USB-Type-A interface 60c by the first power circuit 12a is 5V. Also, the USB-Type-A interface 60c transmits signals to the external device 10c via the D+ / D- terminals 62c.

[0078] The USB hub 53 electrically connected to the USB-Type-A interface 60c is controlled by the host controller 342 of the USB controller 34 via the system bus 41. That is, the USB-Type-A interface 60c is controlled by the host controller 342.

[0079] Note that the USB-Type-A interface 60d shown in FIG. 8 has the same configuration as the USB-Type-A interface 60c shown in FIG. 7, so the description thereof is omitted.

[0080] Next, with reference to FIG. 9, the USB-Type-B interface 60e will be described. FIG. 9 is a block diagram of the USB controller 34 and the USB-Type-B interface 60e.

[0081] The USB-Type-B interface 60e includes a VBUS terminal 61e and D+ / D- terminals 62e. Different from the above-described USB-Type-C interfaces 60a and 60b, the CC terminals 63a and 63b are omitted. Therefore, the USB-Type-B interface 60e does not have a function of identifying the state of the connected external device 10e. 。

[0082] The USB-Type-B interface 60e is powered by the first power circuit 12a and supplies power to the external device 10e via the VBUS terminal 61e. For example, the voltage supplied to the USB-Type-B interface 60e by the first power circuit 12a is 5V. Also, the USB-Type-B interface 60e transmits signals to the external device 10e via the D+ / D- terminals 62e.

[0083] The USB-Type-B interface 60e is controlled by the device controller 341 of the USB controller 34 via the system bus 41.

[0084] That is, unlike the USB-Type-A interfaces 60c and 60d, the USB-Type-B interface 60e is controlled by the USB controller 34 without going through the USB hub 53. Note that the USB-Type-B interface 60e may be configured to be controlled by the USB controller 34 via the USB hub 53.

[0085] 1-4. Printing device With reference to FIGS. 10 to 12, the schematic configuration of the printing device 2 will be described.

[0086] In FIGS. 10 to 12, the +X direction is the front direction of the printing device 2, the -X direction is the rear direction of the printing device 2, the +Y direction is the right direction of the printing device 2, the -Y direction is the left direction of the printing device 2, the +Z direction is the upward direction of the printing device 2, and the -Z direction is the downward direction of the printing device 2.

[0087] The printing device 2 is, for example, a thermal printer. As shown in FIG. 10, the printing device 2 has a main body case 200 having a rectangular parallelepiped shape as a whole, excluding irregularities such as buttons. As shown in FIG. 12, the bottom cover 241 and the rear cover 246 of the printing device 2 are detachable, and the main body frame 208 is covered by the bottom cover 241 and the rear cover 246.

[0088] Inside the main body case 200, a printing unit 20 shown in FIG. 2, a medium storage unit 210 for storing the medium P, and a connector unit 220 are provided. The printed medium P is discharged from the medium discharge port 13 via a conveyance path formed between the opening / closing door 203 and the main body case 200 when the opening / closing door 203 is closed.

[0089] The opening / closing door 203 forms the first case surface 200a of the main body case 200 and is connected to the rear of the main body case 200 so as to be openable and closable. In FIG. 10, the first case surface 200a is the front surface of the main body case 200. The opening / closing door 203 is provided with, for example, conveyance rollers at the front end, and the conveyance rollers are arranged to face the thermal head 21 provided on the main body case 200 when the opening / closing door 203 is closed. When the opening / closing door 203 is closed, the conveyance rollers and the thermal head 21 hold the medium P, the medium P is conveyed by the rotation of the conveyance rollers, and printing is performed on the printing surface of the medium P by the thermal head 21. A display unit 11, a medium discharge port 13, a power switch 201, an opening / closing lever 202, and a feed switch 204 are provided on the first case surface 200a of the main body case 200. That is, the display unit 11, the medium discharge port 13, the power switch 201, the opening / closing lever 202, and the feed switch 204 are arranged on the first case surface 200a of the main body case 200.

[0090] Further, the connector unit 220 faces the third case surface 200c of the main body case 200 and is provided in a routing portion 215 formed between the third case surface 200c and the first main body frame surface 205. In FIG. 10, the third case surface 200c is the bottom surface of the main body case 200. The connector unit 220 includes a substrate 300 provided with various receptacle connectors, as will be described later. The substrate 300 is parallel to the third case surface 200c of the main body case 200 and is arranged. For example, the substrate 300 is connected to a main board housed inside the main body case 200 and is arranged to be parallel to the third case surface 200c of the main body case 200.

[0091] The power switch 201 is a switch for turning on or off the power of the printing device 2. As shown in FIG. 1, the printing device 2 is connected to a commercial AC power supply via a power cable 5 and power is supplied. The printing device 2 performs printing on the medium P and communication with external devices such as the smart device 3a when the power is on.

[0092] The opening / closing lever 202 is for opening and closing the opening / closing door 203. The user operates the opening / closing lever 202 to open the opening / closing door 203 and stores the thermal roll paper 26, which is the medium P, in the medium storage section 210 provided in the main body case 200. The opening / closing door 203 seals the medium storage section 210 from above.

[0093] The feed switch 204 is a switch for feeding the thermal roll paper 26, which is the medium P, stored in the medium storage section 210. Specifically, the user can feed the thermal roll paper 26 to a desired position by operating the feed switch 204. For example, while the user is pressing the feed switch 204, the roll paper may be conveyed, and while the user is not pressing the feed switch 204, the conveyance of the roll paper may be stopped.

[0094] The display unit 11 may display, for example, information regarding the communication state, information prompting replenishment of the medium P, etc. Since the display unit 11 has the role of notifying the user of the state of the printing device 2, it is preferably provided at a position where the user can easily view it. For example, when the printing device 2 is arranged such that the second case surface 200b of the main body case 200 is the front surface, the user can easily view the display unit 11 and the medium discharge port 13.

[0095] The media discharge port 13 discharges a medium P on which characters, images, etc. are printed based on print data. As described above, for example, when a user is in front of the printing apparatus 2 and the printing apparatus 2 is arranged such that the second case surface 200b of the main body case 200 faces forward, the printed surface of the medium P faces the user. Therefore, the user can check the content printed on the medium P while observing the state in which the medium P is discharged from the media discharge port 13. For this reason, the user can check the printed content without waiting for the completion of the discharge of the medium P from the media discharge port 13.

[0096] Therefore, similar to the display unit 11, the media discharge port 13 is preferably provided at a position where it is easily visible to the user. Further, it is more preferable that the media discharge port 13 is provided near the display unit 11 so that the user can view it simultaneously with the display unit 11. Specifically, the media discharge port 13 and the display unit 11 are preferably provided side by side on the first case surface 200a of the main body case 200, and the longitudinal direction of the media discharge port 13 and the display unit 11 is the Y direction, which is the width direction of the main body case 200.

[0097] As shown in FIG. 11, the bottom cover 241 that constitutes the third case surface 200c of the main body case 200 is detachable and covers the trailing portion 215. The bottom cover 241 has a substantially rectangular shape. The bottom cover 241 has a plurality of elastic members 251 that serve as legs of the printing apparatus 2. Further, the bottom cover 241 has a plurality of holes 252. The holes 252 discharge water droplets that have entered the inside of the main body case 200 to the outside of the main body case 200. In addition to being used by placing the printing apparatus 2 on a table, floor, etc., the printing apparatus 2 can also be used by hanging it on a wall. At this time, the holes 252 engage with a wall-hanging member (not shown), and the printing apparatus 2 is hung on the wall. Thereby, the printing apparatus 2 can be used in a so-called wall-hanging state, and the table and the floor can be used widely.

[0098] As shown in FIG. 11, the back cover 246 that constitutes the fourth case surface 200d of the main body case 200 is detachable and covers the second main body frame surface 206. In FIG. 10, the fourth case surface 200d is the back surface of the main body case 200. The back cover 246 has a shape on a substantially rectangle. The back cover 246 covers the main body frame 208 from the back. The back cover 246 has a cable outlet 255 for pulling out various cables that connect the printing device 2 and various external devices.

[0099] As shown in FIG. 12, on the fifth case surface 200e and the sixth case surface 200f of the main body case 200, a first attachment portion 271 for attaching the bottom cover 241 is provided. In FIG. 10, the fifth case surface 200e is the left side surface of the main body case 200, and the sixth case surface 200f is the right side surface of the main body case 200. Similarly, on the fifth case surface 200e and the sixth case surface 200f of the main body case 200, a second attachment portion 276 for attaching the back cover 246 is provided.

[0100] The first attachment portion 271 is formed at the lower end portions of the fifth case surface 200e and the sixth case surface 200f of the main body case 200. The first attachment portion 271 is provided with a case-side engaging portion 272. By engaging the case-side engaging portion 272 and the cover-side engaging portion 242 provided on the bottom cover 241, the bottom cover 241 is attached to the main body case 200.

[0101] The second attachment portion 276 is formed at the rear end portions of the fifth case surface 200e and the sixth case surface 200f of the main body case 200. The second attachment portion 276 is provided with a case-side engaging portion 277. By engaging the case-side engaging portion 277 and the cover-side engaging portion 247 provided on the back cover 246, the back cover 246 is attached to the main body case 200.

[0102] In addition, circular cutouts 261 and 262 are provided at the corner where the first attachment portion 271 and the second attachment portion 276 provided on the fifth case surface 200e and the sixth case surface 200f of the main body case 200 intersect. Further, the cutouts 261 and 262 communicate with the routing portion 215.

[0103] Note that the routing portion 215 is a space between the third case surface 200c of the main body case 200 and the first main body frame surface 205, and is further a space defined by the fourth case surface 200d, the fifth case surface 200e, the sixth case surface 200f of the main body case 200, and the connector portion 220.

[0104] Note that the routing portion 215 is defined with reference to the X direction, Y direction, and Z direction shown in FIGS. 10 to 12. The X direction is between the back cover 246 and the first connector surface 221 and the second connector surface 222 of the connector portion 220, the Y direction is between the fifth case surface 200e and the sixth case surface 200f of the main body case 200, and the Z direction is between the bottom cover 241 and the first main body frame surface 205. The first connector surface 221 or the second connector surface 222 is a flat plate surface, which is, for example, a sheet metal. Note that the flat plate surface is not limited to a metal flat plate such as a sheet metal, and may be a flat plate made of resin or the like.

[0105] Various cables connected to the connector portion 220 are routed inside the routing portion 215. Then, the various cables connected to the connector portion 220 are drawn out to the outside of the main body case 200 through the cutouts 261 and 262, or the cable outlet 255 provided in the back cover 246.

[0106] Note that the printing apparatus 2 is in a first posture in which the media discharge port 13 of the medium P faces upward, or the The media discharge port 13 can be installed in the second posture facing forward. That is, in the case of the first posture, the printed medium P is discharged from the media discharge port 13 in the +Z direction, and in the case of the second posture, the printed medium P is discharged from the media discharge port 13 in the +X direction. Also, in the case of the first posture, the first case surface 200a becomes the upper surface of the main body case 200, and in the case of the second posture, the first case surface 200a becomes the front surface of the main body case 200.

[0107] Specifically, in the case of the first posture, the connector portion 220 is covered by the bottom cover 241, while in the case of the second posture, the connector portion 220 is covered by the back cover 246.

[0108] In both the first and second postures, a plurality of elastic members 251 serving as the legs of the printing apparatus 2 are arranged on the bottom surface of the printing apparatus 2, so that the printing apparatus 2 can be stably installed. Also, since a plurality of elastic members 251 are not arranged on the back surface of the printing apparatus 2, the appearance of the printing apparatus 2 is not damaged. Note that, for a simpler configuration, only one of the bottom cover 241 and the back cover 246 that covers the connector portion 220 may be detachable, and the other cover may be integrated with the main body case 200. In this case, when in the first posture, the cover covering the connector portion 220 becomes the bottom surface, and when in the second posture, the cover covering the connector portion 220 becomes the back surface.

[0109] As shown in FIG. 12, the connector portion 220 has a first connector surface 221 and a second connector surface 222. The connector portion 220 including the first connector surface 221 and the second connector surface 222 is formed as a flat plate, and the outer and inner surfaces of the first connector surface 221 and the second connector surface 222 are formed to be flat. Here, unless otherwise specified, the flat plate is a metal sheet.

[0110] The first connector surface 221 has openings 220a, 220b, 220c, and 220d formed therein, and the second connector surface 222 has openings 220e, 220f, and 220g formed therein.

[0111] Openings corresponding to the USB-Type-C receptacle connectors 320a, 320b, USB-Type-A receptacle connectors 320c, 320d, USB-Type-B receptacle connector 320e, power connector 320f, and DK (Drawer Kick) receptacle connector 320g mounted on the mounting surface 301 of the substrate 300 shown in FIG. 13 are formed in the first connector surface 221 and the second connector surface 222. Note that the opening 220g may correspond to a LAN (Local Area Network) receptacle connector.

[0112] The USB-Type-C receptacle connector 320a is electrically connected to the external device 10a and enables communication between the external device 10a and the control unit 30. The USB-Type-C receptacle connector 320a is provided on the substrate 300, and the outer periphery of its insertion port coincides with the inner periphery of the opening 220a. The USB-Type-C receptacle connector 320a is mounted on the substrate 300. Thereby, the risk of foreign objects such as dust and insects entering the inside of the connector portion 220 is reduced. Note that the insertion port of the USB-Type-C receptacle connector 320a is arranged along the first connector surface 221.

[0113] The USB-Type-C receptacle connector 320b is electrically connected to the external device 10b and enables communication between the external device 10b and the control unit 30. The USB-Type-C receptacle connector 320b is provided on the substrate 300, and the outer periphery of its insertion port coincides with the inner periphery of the opening 220b. The USB-Type-C receptacle connector 320b is mounted on the substrate 300. Thereby, the risk of foreign objects such as dust and insects entering the inside of the connector portion 220 is reduced. Note that the insertion port of the USB-Type-C receptacle connector 320b is arranged along the first connector surface 221. Also, the USB-Type-C receptacle connector 320b and the USB-Type-C receptacle connector 320a are arranged adjacent to each other.

[0114] The USB-Type-C receptacle connectors 320a and 320b are equipped with CC terminals. Different from other USB specifications, between the printing device 2 and the external devices 10a and 10b connected to the printing device, the master and slave are not clearly fixed. That is, the printing device 2 may receive commands from the external devices 10a and 10b and operate, or may give commands to the external devices 10a and 10b and the external devices 10a and 10b may operate. For example, the printing device 2 may supply power to the external devices 10a and 10b. Thus, in the USB-Type-C specification, since the printing device 2 may operate as either a master or a slave, the printing device 2 is provided with a plurality of USB-Type-C receptacle connectors 320a and 320b, and can also operate as both a master and a slave simultaneously, improving the convenience for the user who uses the printing device 2.

[0115] The USB-Type-A receptacle connector 320c is electrically connected to the external device 10c, enabling communication between the external device 10c and the control unit 30. Also, the USB-Type-A receptacle connector 320c is provided on the substrate 300, and its insertion port outer periphery is mounted on the substrate 300 so as to coincide with the inner periphery of the opening 220c. Thereby, the risk of foreign objects such as dust and insects entering the inside of the connector portion 220 is reduced. Note that the insertion port of the USB-Type-A receptacle connector 320c is arranged along the first connector surface 221.

[0116] The USB-Type-A receptacle connector 320d is electrically connected to the external device 10d, enabling communication between the external device 10d and the control unit 30. Also, the USB-Type-A receptacle connector 320d is provided on the substrate 300, and its outer periphery of the insertion port coincides with the inner periphery of the opening 220d. The USB-Type-A receptacle connector 320d is mounted on the substrate 300. This reduces the risk of foreign objects such as dust and insects entering the inside of the connector portion 220. Note that the insertion port of the USB-Type-A receptacle connector 320d is arranged along the first connector surface 221.

[0117] The USB-Type-B receptacle connector 320e is electrically connected to the external device 10e, enabling communication between the external device 10e and the control unit 30. Also, the USB-Type-B receptacle connector 320e is provided on the substrate 300, and its outer periphery of the insertion port coincides with the inner periphery of the opening 220e. The USB-Type-B receptacle connector 320e is mounted on the substrate 300. This reduces the risk of foreign objects such as dust and insects entering the inside of the connector portion 220. Note that the insertion port of the USB-Type-B receptacle connector 320e is arranged along the second connector surface 222, which is different from the first connector surface 221.

[0118] The power connector 320f is connected to a commercial AC power source (not shown) and supplies power to the control unit 30. Also, the power connector 320f is provided on the substrate 300, and its outer periphery of the insertion port coincides with the inner periphery of the opening 220f. The power connector 320f is mounted on the substrate 300. This can reduce the risk of foreign objects such as dust and insects entering the inside of the connector portion 220. Note that the insertion port of the power connector 320f is arranged along the second connector surface 222, which is different from the first connector surface 221.

[0119] The DK receptacle connector 320g is electrically connected to, for example, the cash drawer 270, enabling communication between the cash drawer 270 and the control unit 30. The DK receptacle connector 320g is provided on the substrate 300, and the DK receptacle connector 320g is mounted on the substrate 300 such that the outer periphery of its insertion port coincides with the inner periphery of the opening 220g. This can reduce the risk of foreign objects such as dust and insects entering the inside of the connector part 220. The insertion port of the DK receptacle connector 320g is arranged along a second connector surface 222 different from the first connector surface 221.

[0120] The inner perimeters of the openings 220a, 220b, 220c, 220d, 220e, 220f, and 220g are designed to coincide with the outer perimeters of the USB-Type-C receptacle connectors 320a, 320b, the USB-Type-A receptacle connectors 320c, 320d, the USB-Type-B receptacle connectors 320e, the power connector 320f, and the DK receptacle connector 320g, respectively. Therefore, the outer perimeter of the insertion port and the inner perimeter of the opening coincide. However, if an error occurs due to manufacturing, the inner perimeter of each opening and the outer perimeter of the connector corresponding to that opening will be substantially coincident. Since this is not an error due to design, the said substantial coincidence shall be included in the coincidence.

[0121] The opening 220a formed in the first connector surface 221 corresponds to the USB-Type-C receptacle connector 320a, the opening 220b formed in the first connector surface 221 corresponds to the USB-Type-C receptacle connector 320b, the opening 220c formed in the first connector surface 221 corresponds to the USB-Type-A receptacle connector 320c, and the opening 220d formed in the first connector surface 221 corresponds to the USB-Type-A receptacle connector 320d.

[0122] The opening 220e formed in the second connector surface 222 corresponds to the USB-Type-B receptacle connector 320e, the opening 220f formed in the second connector surface 222 corresponds to the power connector 320f, and the opening 220g formed in the second connector surface 222 corresponds to the DK receptacle connector 320g.

[0123] Also, the connector portion 220 is provided on the first main body frame surface 205 inside the third case surface 200c that constitutes the bottom surface of the main body case 200. On the other hand, the medium discharge port 13 is provided on the first case surface 200a that constitutes the upper surface of the main body case 200. In this way, since the connector portion 220 is provided inside the bottom cover 241 that constitutes the bottom surface of the main body case 200, which is the surface opposite to the upper surface of the main body case 200 where the medium discharge port 13 is provided, the user cannot simultaneously visually recognize the medium P discharged upward from the medium storage portion of the main body case 200 and the connector portion 220. That is, the user cannot simultaneously visually recognize the medium discharge port 13 and the connector portion 220.

[0124] That is, when the medium discharge port 13 is in a visible state, the user cannot visually recognize the USB-Type-C receptacle connectors 320a, 320b, the USB-Type-A receptacle connectors 320c, 320d, the USB-Type-B receptacle connector 320e, the power connector 320f, and the DK receptacle connector 320g. That is, the user cannot simultaneously visually recognize the medium discharge port 13 and the first connector surface 221 and the second connector surface 222.

[0125] Note that during the use of the normal printing device 2, the first main body frame surface 205 is often covered by the bottom cover 241, the connector portion 220 is not exposed to the outside, and the user cannot visually recognize the connector portion 220. However, when the bottom cover 241 is detached from the main body case 200, the connector portion 220 is exposed to the outside, and the user can visually recognize the connector portion 220.

[0126] 1-5. Countermeasures against incorrect insertion When the user connects the external device 10a to the printing device 2 using, for example, the USB-Type-C cable 400a shown in FIG. 18, the user removes the bottom cover 241 and, while visually checking the first connector surface 221 and the second connector surface 222, inserts the plug 401a of the USB-Type-C cable 400a into the opening 220a of the first connector surface 221, whereby the printing device 2 is connected to the external device 10a. Specifically, after the user positions the printing device 2 in the second posture where the first case surface 200a faces the front of the main body case 200, the user rotates the printing device 2 so that the third case surface 200c faces the user's front. Then, the user removes the cover of the printing device 2 to expose the connector portion 220 and connects the USB-Type-C cable 400a to the printing device 2. In such a case, since the connector portion 220 faces the routing portion 215, it faces in a direction orthogonal to the user's line of sight, making it difficult for the user to visually check the opening 220a of the first connector surface 221. Therefore, there was a possibility that the user would insert the cable into another opening, causing incorrect insertion.

[0127] Also, the user may connect the USB-Type-C cable 400b shown in FIG. 18 to the connector portion 220 with the second case surface 200b of the printing device 2 facing the user. Such cases may include, for example, when a new external device 10b is newly connected while the printing device 2 is in use after the installation and initial settings of the printing device 2 are completed.

[0128] When the user connects the external device 10a to the printing device 2 using, for example, the USB-Type-C cable 400a shown in FIG. 18, the user removes the bottom cover 241 and, while visually checking the first connector surface 221 and the second connector surface 222, inserts the plug 401a of the USB-Type-C cable 400a into the opening 220a of the first connector surface 221, whereby the printing device 2 is connected to the external device 10a.

[0129] In this case, the second case surface 200b of the printing apparatus 2 faces the user, and the user cannot visually recognize the first connector surface 221 and the second connector surface 222. For this reason, the user confirms the positions of the respective connectors while feeling the first connector surface 221 and the second connector surface 222 with their hands. That is, the user connects each cable to the connector portion 220 in a so-called groping state without visually observing the connector portion 220. Therefore, there was a possibility that the user inserted the cable into another opening, causing a misinsertion.

[0130] Since the connector portion 220 has a first connector surface 221 and a second connector surface 222 that are parallel to each other and different from the first connector surface 221, even when the user has difficulty visually recognizing or is in a groping state, the user can recognize the first connector surface 221 and the second connector surface 222 as different surfaces.

[0131] FIG. 13 is a plan view of the first connector surface 221 and the second connector surface 222 of the connector portion 220. With reference to FIG. 13, when the user connects each cable to the connector portion 220 in a state where it is difficult to visually recognize or in a groping state, possible misinsertions and countermeasures will be described.

[0132] The plugs 401a and 401b of the USB-Type-C cables 400a and 400b can be inserted into the USB-Type-C receptacle connectors 320a and 320b, whereby the printing apparatus 2 is communicably connected to the external devices 10a and 10b.

[0133] In addition, the plugs 401a and 401b of the USB-Type-C cables 400a and 400b can be inserted into the USB-Type-A receptacle connectors 320c and 320d, but the printing device 2 cannot communicate with the external devices 10a and 10b. That is, although the shapes of the plugs 401a and 401b of the USB-Type-C cables 400a and 400b are different from the shapes of the USB-Type-A receptacle connectors 320c and 320d, the printing device 2 can physically connect to the external devices 10a and 10b using the USB-Type-C cables 400a and 400b. However, the printing device 2 and the external devices 10a and 10b are not communicably connected.

[0134] In addition, the plugs 401a and 401b of the USB-Type-C cables 400a and 400b can be inserted into the USB-Type-B receptacle connector 320e, but the printing device 2 cannot communicate with the external device 10a or the external device 10b. That is, the printing device 2 can physically connect to the external device 10a or the external device 10b using the USB-Type-C cables 400a and 400b, but is not communicably connected to the printing device 2.

[0135] As described above, although the shapes of the insertion ports are different, the state where they are physically connected and fixed is regarded as the state where the plugs 401a and 401b of the USB-Type-C cables 400a and 400b are misinserted into the connector unit 220. Such misinsertion may occur, for example, with the USB-Type-A receptacle connectors 320c and 320d, the USB-Type-B receptacle connector 320e, and the DK receptacle connector 320g.

[0136] If an incorrect insertion occurs, there is a risk of malfunction, failure, or damage to the physically connected external device. Similarly, the printing device 2 to which these external devices are physically connected may also malfunction, fail, or be damaged. Furthermore, since there is a risk of damage to the receptacle connectors into which the plugs 401a, 401b of the USB-Type-C cables 400a, 400b are incorrectly inserted, the countermeasures described below are implemented.

[0137] Also, it is considered that such an incorrect insertion is likely to occur with a receptacle connector larger than the insertion ports of the USB-Type-C receptacle connectors 320a, 320b. Note that although it depends on the shape of the insertion port of the receptacle connector, the larger the insertion port, the higher the risk of incorrect insertion.

[0138] The insertion port of the USB-Type-B receptacle connector 320e is smaller than the insertion port of the DK receptacle connector 320g. Also, the insertion ports of the USB-Type-A receptacle connectors 320c, 320d are smaller than the insertion port of the DK receptacle connector 320g.

[0139] That is, since the insertion port of the USB-Type-B receptacle connector 320e is smaller than the insertion port of the DK receptacle connector 320g, relatively speaking, the risk of incorrect insertion into the USB-Type-B receptacle connector 320e is smaller than that into the DK receptacle connector 320g.

[0140] Also, since the insertion ports of the USB-Type-A receptacle connectors 320c, 320d are smaller than the insertion ports of the DK receptacle connector 320g and the USB-Type-B receptacle connector 320e, relatively speaking, the risk of incorrect insertion into the USB-Type-A receptacle connectors 320c, 320d is smaller than that into the DK receptacle connector 320g and the USB-Type-B receptacle connector 320e.

[0141] A USB-Type-B receptacle connector 320e is disposed between the USB-Type-C receptacle connectors 320a and 320b and the DK receptacle connector 320g.

[0142] The USB-Type-B receptacle connector 320e has a lower risk of incorrect insertion than the DK receptacle connector 320g. In this way, by disposing the USB-Type-B receptacle connector 320e, which has a lower risk of incorrect insertion, between the USB-Type-C receptacle connectors 320a and 320b and the DK receptacle connector 320g, the risk of incorrect insertion into the DK receptacle connector 320g is reduced.

[0143] Also, USB-Type-A receptacle connectors 320c and 320d are disposed between the USB-Type-C receptacle connectors 320a and 320b and the DK receptacle connector 320g.

[0144] The USB-Type-A receptacle connectors 320c and 320d have a lower risk of incorrect insertion than the DK receptacle connector 320g. In this way, by disposing the USB-Type-A receptacle connectors 320c and 320d, which have a lower risk of incorrect insertion, between the USB-Type-C receptacle connectors 320a and 320b and the DK receptacle connector 320g, the risk of incorrect insertion into the DK receptacle connector 320g is reduced.

[0145] Also, USB-Type-A receptacle connectors 320c and 320d are disposed between the USB-Type-C receptacle connectors 320a and 320b and the USB-Type-B receptacle connector 320e.

[0146] The USB-Type-A receptacle connectors 320c and 320d have a lower risk of misinsertion than the USB-Type-B receptacle connector 320e. In this way, by arranging the USB-Type-A receptacle connectors 320c and 320d, which have a lower risk of misinsertion, between the USB-Type-C receptacle connectors 320a and 320b and the USB-Type-B receptacle connector 320e, the risk of misinsertion into the USB-Type-B receptacle connector 320e is reduced.

[0147] That is, by arranging a receptacle connector with a lower risk of misinsertion between the USB-Type-C receptacle connectors 320a and 320b and a receptacle connector that may be misinserted with the plugs 401a and 401b of the USB-Type-C cables 400a and 400b, the user can reduce the risk of misinserting the plugs 401a and 401b of the USB-Type-C cables 400a and 400b.

[0148] Furthermore, it is preferable to arrange a power connector 320f that cannot be misinserted between the USB-Type-C receptacle connectors 320a and 320b and a receptacle connector that may be misinserted with the plugs 401a and 401b of the USB-Type-C cables 400a and 400b.

[0149] Also, the long side X of the insertion ports of the USB-Type-C receptacle connectors 320a and 320b and the long side Y of the insertion ports of the USB-Type-A receptacle connectors 320c and 320d are in different directions from each other. In other words, the direction in which the long side X of the USB-Type-C receptacle connectors 320a and 320b extends and the direction in which the long side Y of the USB-Type-A receptacle connectors 320c and 320d extends are different. If the direction in which the long side X of the USB-Type-C receptacle connectors 320a and 320b extends and the direction in which the long side Y of the USB-Type-A receptacle connectors 320c and 320d extends are the same, since the long side Y is longer than the long side X and the short side y is longer than the short side x, the plugs 401a and 401b of the USB-Type-C cables 400a and 400b can be inserted into the USB-Type-A receptacle connectors 320c and 320d, increasing the risk of incorrect insertion. The long side X forming the insertion port of the USB-Type-C receptacle connectors 320a and 320b is a side extending in a direction parallel to the mounting surface 301 of the substrate 300, and the short side x is an arc-shaped side extending in a direction intersecting the long side X.

[0150] The direction in which the long side X of the USB-Type-C receptacle connectors 320a and 320b extends and the extension of the long side Y of the USB-Type-A receptacle connectors 320c and 320d Since the directions are different, the risk of incorrect insertion is reduced. However, since the connector portion 220 may increase in size, it is desirable to arrange the short side y of the USB-Type-A receptacle connectors 320c and 320d on the mounting surface 301 of the substrate 300 so that the direction in which the long side X of the USB-Type-C receptacle connectors 320a and 320b extends and the direction in which the long side Y of the USB-Type-A receptacle connectors 320c and 320d extends are perpendicular. Note that the direction in which the long side X of the USB-Type-C receptacle connectors 320a and 320b extends and the direction in which the long side Y of the USB-Type-A receptacle connectors 320c and 320d extends may intersect.

[0151] That is, it is desirable that the direction in which the short side x of the USB-Type-C receptacle connectors 320a and 320b extends and the direction in which the short side y of the USB-Type-A receptacle connectors 320c and 320d extends are orthogonal or intersect. Thereby, the risk of incorrect insertion is greatly reduced.

[0152] Note that the short side y of the USB-Type-A receptacle connectors 320c and 320d is shorter than the long side X of the USB-Type-C receptacle connectors 320a and 320b. For this reason, when the plugs 401a and 401b of the USB-Type-C cables 400a and 400b are at an angle insertable into the USB-Type-C receptacle connectors 320a and 320b, that is, when the longitudinal directions of the plugs 401a and 401a are parallel to the substrate 300, the risk of incorrect insertion into the USB-Type-A receptacle connectors 320c and 320d is extremely small.

[0153] Also, the USB-Type-C receptacle connectors 320a and 320b are mounted on the substrate 300 such that the long side X contacts the mounting surface 301. Compared with the case where the short side x is mounted on the substrate 300 so as to contact the mounting surface 301, the area of the USB-Type-C receptacle connectors 320a and 320b that contacts the mounting surface 301 of the substrate 300 becomes larger. For this reason, the USB-Type-C receptacle connectors 320a and 320b are firmly fixed to the substrate 300. For this reason, the strength against crosstalk of the USB-Type-C receptacle connectors 320a and 320b is increased.

[0154] In the connector portion 220 shown in FIG. 13, the USB-Type-C receptacle connectors 320a and 320b are arranged so as to be horizontally placed with respect to the so-called mounting surface 301, and the USB-Type-A receptacle connectors 320c and 320d are arranged so as to be vertically placed with respect to the so-called mounting surface 301.

[0155] By being arranged to be placed horizontally, the USB-Type-C receptacle connectors 320a and 320b are firmly fixed to the substrate 300 as described above. Also, by being arranged to be placed vertically, the USB-Type-A receptacle connectors 320c and 320d can narrow the intervals between the respective receptacle connectors as described above, so that the connector portion 220 can be miniaturized.

[0156] Conversely, the plugs 401c and 401d of the USB-Type-A cables 400c and 400d and the plug 401e of the USB-Type-B cable 400e are larger than the insertion openings of the USB-Type-C receptacle connectors 320a and 320b. For this reason, the plugs 401c and 401d of the USB-Type-A 400c and 400d and the plug 401e of the USB-Type-B cable 400e cannot be physically inserted into the USB-Type-C receptacle connectors 320a and 320b.

[0157] In view of these, as shown in FIG. 13, among the plurality of receptacle connectors provided in the connector portion 220, the USB-Type-C receptacle connectors 3 20a and 320b with small insertion openings are preferably arranged at the end Z among the plurality of connectors provided in the connector portion 220. That is, by arranging the USB-Type-C receptacle connectors 320a and 320b corresponding to the plugs 401a and 401b of the USB-Type-C cables 400a and 400b, which may be misinserted into the other plurality of receptacle connectors, at the end Z of the first connector surface 221, the user can correctly recognize the positions of the USB-Type-C receptacle connectors 320a and 320b even in a state where they are difficult to visually recognize or are groping, and the risk of misinsertion is reduced. Note that the end Z is the end in the -Y direction in the present embodiment.

[0158] The insertion port of the power connector 320f is circular, while the USB-Type-C receptacle connectors 320a, 320b, the USB-Type-A receptacle connectors 320c, 320d, the USB-Type-B receptacle connectors 320e, and the DK receptacle connector 320g are rectangular. Here, since the power connector 320f is circular and the other receptacle connectors have corners, they are considered rectangular.

[0159] Since the insertion port of the power connector 320f is circular, the user can correctly recognize the position of the power connector 320f even in a state where it is difficult to visually confirm or in a groping state. Also, because the concave-convex shape of the insertion port of the power connector 320f is different from that of the other receptacle connectors, it is easy for the user to recognize. That is, even in a state where it is difficult to visually confirm or in a groping state, the user can correctly recognize the position of the power connector 320f, making it easier to recognize the positions of the respective receptacle connectors.

[0160] Moreover, the insertion port of the power connector 320f has a structure in which a plurality of recesses for pin insertion are provided according to the plurality of pins of the power cable 5. Since the recesses are each sufficiently small, each cable cannot be inserted into the insertion port of the power connector 320f. Therefore, even if each cable is mistakenly inserted into the position of the power connector 320f, the user can recognize that it is a misinsertion because each cable will not be inserted.

[0161] On the first connector surface 221, no circular connector is arranged, while on the second connector surface 222, a rectangular connector is arranged. The circular power connector 320f is arranged on the second connector surface 222 instead of the first connector surface 221. The rectangular USB-Type-C receptacle connectors 320a, 320b and the USB-Type-A receptacle connectors 320c, 320d are arranged on the first connector surface 221. By providing the power connector 320f, which is easy for the user to recognize, on the second connector surface 222, the user can recognize the first connector surface 221 where the USB-Type-C receptacle connectors 320a, 320b are provided, even when it is difficult to visually recognize or in a groping state. Therefore, the risk of misinsertion is reduced.

[0162] For example, when the power connector 320f is arranged between the USB-Type-C receptacle connectors 320a, 320b and the DK receptacle connector 320g, the user can correctly recognize the position of the power connector 320f, so the risk of misinsertion into the DK receptacle connector 320g is reduced.

[0163] Figures 14 and 15 are perspective views of the cash drawer 270. Figure 14 is a perspective view of the cash drawer 270 with the drawer tray 273 closed, and Figure 15 is a perspective view of the cash drawer 270 with the drawer tray 273 open. Also, Figure 16 is a perspective view of the buzzer 280.

[0164] As shown in Figures 14 and 15, the cash drawer 270 includes a drawer tray 273 and a drawer kick cable 275. The drawer tray 273 can be opened and closed. It is attached to the cash drawer 270 as shown. Cash and the like are stored in the drawer tray 273. Further, the interior of the drawer tray 273 is partitioned by partition plates 274a, 274b, 274c, 274d, 274e. For example, the partition plates 274a, 274b, 274c, 274d, 274e may be removable. In this case, the internal partitioning of the drawer tray 273 can be changed.

[0165] The drawer kick cable 275 is connected to the DK receptacle connector 320g of the connector unit 220. That is, the cash drawer 270 is electrically connected to the printing device 2 via the drawer kick cable 275, and the cash drawer 270 can communicate with the control unit 30 of the printing device 2.

[0166] The cash drawer 270 connected to the printing device 2 is controlled by the printing device 2. The printing device 2 can control operations such as opening, closing, and locking of the drawer tray 273. On the other hand, the user may be able to close the drawer tray 273, operate the keyhole 274, and manually lock the drawer tray 273.

[0167] Also, the DK receptacle connector 320g of the connector unit 220 can be connected to the buzzer 280 shown in FIG. 16. The buzzer 280 includes a volume adjustment knob 281, a speaker 283, and a drawer kick cable 285.

[0168] The buzzer 280 is electrically connected to the printing device 2 via the drawer kick cable 285, and the buzzer 280 can communicate with the control unit 30 of the printing device 2. Thereby, for example, when the printing device 2 is printing, a sound can come out from the speaker 283 to notify the user that printing is in progress. The volume of the speaker 283 can be adjusted by the volume adjustment knob 281. For example, the user can operate the volume adjustment knob 281 and set an appropriate volume according to the surrounding environment. Also, the buzzer 280 may be set to play not only a buzzer sound but also a melody.

[0169] In addition, the DK receptacle connector 320g of the connector unit 220 can be replaced with a LAN receptacle connector. In this case, a LAN cable can be connected to the LAN receptacle connector, and the printing apparatus 2 can be connected to network devices such as a network hub and a router. Note that the DK receptacle connector 320g is an example of a LAN or DK receptacle connector.

[0170] 1-6. Substrate With reference to FIG. 17, the substrate 300 will be described. FIG. 17 is a diagram showing the substrate 300.

[0171] The substrate 300 includes USB-Type-C receptacle connectors 320a and 320b, USB-Type-A receptacle connectors 320c and 320d, USB-Type-B receptacle connector 320e, a power connector 320f, a DK receptacle connector 320g, a first power circuit 12a, a second power circuit 12b, a first locking member 331, and a second locking member 332.

[0172] In addition, the substrate 300 has a first side 311, a second side 312, and a third side 313 that face the inner surfaces of the first connector surface 221 and the second connector surface 222 of the connector unit 220. Specifically, the substrate 300 faces the inner surfaces of the first connector surface 221 and the second connector surface 222, and the inner surfaces of the first connector surface 221 and the second connector surface 222 and the substrate 300 are orthogonal to each other.

[0173] The USB-Type-C receptacle connectors 320a and 320b are provided along the first side 311 of the substrate 300.

[0174] In addition, the USB-Type-C receptacle connectors 320a and 320b can be connected to plugs 401a and 401b of USB-Type-C cables 400a and 400b through openings 220a and 220b provided in the first connector surface 221 of the connector unit 220.

[0175] The USB-Type-A receptacle connectors 320c and 320d are provided along the second side 312 of the substrate 300.

[0176] Also, the USB-Type-A receptacle connectors 320c and 320d can be connected to the plugs 401c and 401d of the USB-Type-A cables 400c and 400d through the openings 220c and 220d provided on the first connector surface 221 of the connector portion 220.

[0177] The USB-Type-B receptacle connector 320e is provided along the third side 313 of the substrate 300.

[0178] Also, the USB-Type-B receptacle connector 320e can be connected to the plug 401e of the USB-Type-B cable 400e through the opening 220e provided on the second connector surface 222 of the connector portion 220.

[0179] The power connector 320f is provided along the third side 313 of the substrate 300. Also, the power connector 320f can be connected to the power cable 5 through the opening 220f provided on the second connector surface 222 of the connector portion 220. That is, the power connector 320f is a connector for supplying power to the control unit 30 of the printing apparatus 2.

[0180] The DK receptacle connector 320g is provided along the third side 313 of the substrate 300. Also, the DK receptacle connector 320g can be connected to the drawer kick cables 275 and 285 through the opening 220g provided on the second connector surface 222 of the connector portion 220.

[0181] The first power circuit 12a includes a first coil 121a and a first integrated circuit 122a. The first integrated circuit 122a has, for example, a DC-DC converter, a resistive element, a switching element, and a transistor, etc.

[0182] The first power supply circuit 12a converts the power supplied from the power connector 320f into appropriate power and supplies power to the USB-Type-A receptacle connectors 320c, 320d, the USB-Type-B receptacle connector 320e, and the USB-Type-C receptacle connector 320b. In other words, the first coil 121a supplies the first power to the USB-Type-A receptacle connectors 320c, 320d, the USB-Type-B receptacle connector 320e, and the USB-Type-C receptacle connector 320b. The first power is, for example, constant power and is power with a voltage of 5V.

[0183] The second power supply circuit 12b includes a second coil 121b and a second integrated circuit 122b. The second integrated circuit 122b has, for example, a DC-DC converter, a resistance element, a switching element, a transistor, and the like.

[0184] The second power supply circuit 12b converts the power supplied from the power connector 320f into appropriate power and supplies power to the USB-Type-C receptacle connector 320a. In other words, the second coil 121b supplies second power greater than the first power to the USB-Type-C receptacle connector 320a. The second power is, for example, variable power and is power with voltages of 5V, 9V, and 12V.

[0185] As described above, the USB hub 53 operates between the USB controller 34 and the USB interface 60 and is disposed on the substrate 300 between the first power supply circuit 12a and the second power supply circuit 12b. That is, the USB hub 53 is disposed between the first coil 121a and the second coil 121b. That is, the USB hub 53 is disposed between the first power supply circuit 12a with a large heat generation amount and the second power supply circuit 12b. In other words, the USB hub 53 is disposed at a position on the substrate 300 where the influence of the heat generation of the first power supply circuit 12a and the second power supply circuit 12b is small.

[0186] In addition, the USB hub 53 controls the USB-Type-C receptacle connector 320b, and the USB-Type-A receptacle connectors 320c and 320d in accordance with the instructions of the USB controller 34. Also, the USB hub 53 serves as a hub device and a relay device for the USB-Type-C receptacle connector 320b, and the USB-Type-A receptacle connectors 320c and 320d.

[0187] The first locking member 331 and the second locking member 332 are members for fixing the substrate 300 to the main body frame 208 inside the main body case 200. The first locking member 331 and the second locking member 332 engage with an engaged portion of the main body frame 208 (not shown) through holes 331a and 332a provided in the substrate 300. Thereby, the connector portion 220 that houses the substrate 300 is fixed to the main body frame 208. For example, the first locking member 331 and the second locking member 332 are metal screws, and the substrate 300 is screwed to the main body frame 208.

[0188] Note that the holes 331a and 332a are preferably provided in the vicinity of the first coil 121a and the second coil 121b, respectively. The substrate 300 screwed to the main body frame 208 dissipates heat to the main body frame 208 through the screws that are the first locking member 331 and the second locking member 332, and also dissipates heat from the screw heads of the screws that are the first locking member 331 and the second locking member 332. For this reason, the first locking member 331 and the second locking member 332 are preferably screws with large screw heads. For example, the first locking member 331 and the second locking member 332 are preferably round screws rather than so-called dish head screws.

[0189] Among the components mounted on the mounting surface 301 of the substrate 300, since the heat generation amounts of the first coil 121a and the second coil 121b are large, it is preferable that the substrate 300 is screwed to the main body frame 208 in the vicinity of the first coil 121a and the second coil 121b. Further, since the substrate 300 is fixed to the metal main body frame 208 by metal screws which are the first locking member 331 and the second locking member 332, there is an effect of removing the static electricity charged on the substrate 300, and further, there is also an effect of fixing the potential of the substrate 300.

[0190] Referring to FIG. 17, the positional relationship of the components mounted on the substrate 300 will be described.

[0191] In the description, the distances L1 to L7 are defined as follows. Unless otherwise specified, the distances L1 to L7 each refer to the shortest distance between members. The distance L1 is the distance from the first locking member 331 to the first coil 121a. The distance L2 is the distance from the first locking member 331 to the USB-Type-C receptacle connector 320b. The distance L3 is the distance from the second locking member 332 to the second coil 121b. The distance L4 is the distance from the second locking member 332 to the USB-Type-C receptacle connector 320a is. The distance L5 is the distance from the first coil 121a to the USB-Type-C receptacle connector 320b. The distance L6 is the distance from the second coil 121b to the USB-Type-C receptacle connector 320a. The distance L7 is the distance from the first coil 121a to the second coil 121b.

[0192] The distance L1 from the first locking member 331 to the first coil 121a is shorter than the distance L2 from the first locking member 331 to the USB-Type-C receptacle connector 320b. The heat generation amount of the first coil 121a is larger than the heat generation amount of the USB-Type-C receptacle connector 320b. Therefore, by arranging the first coil 121a closer to the first locking member 331 than the USB-Type-C receptacle connector 320b, there is an effect of heat dissipation of the substrate 300.

[0193] The distance L3 from the second locking member 332 to the second coil 121b is shorter than the distance L4 from the second locking member 332 to the USB-Type-C receptacle connector 320a. The heat generation amount of the second coil 121b is larger than the heat generation amount of the USB-Type-C receptacle connector 320a. Therefore, by arranging the second coil 121b closer to the second locking member 332 than the USB-Type-C receptacle connector 320a, there is an effect of heat dissipation of the substrate 300.

[0194] The distance L1 is shorter than the distance L5 from the first coil 121a to the USB-Type-C receptacle connector 320b. As a result, the first locking member 331 dissipates more heat generated by the first coil 121a disposed closer than the heat generated by the USB-Type-C receptacle connector 320b. By arranging the first coil 121a with a large heat generation amount close to the first locking member 331, the heat dissipation efficiency of the substrate 300 is increased.

[0195] If the distance L5 is shorter than the distance L1, since the heat generated by the first coil 121a as the heat source and the heat generated by the USB-Type-C receptacle connector 320b are dissipated by the first locking member 331, the heat dissipation efficiency of the substrate 300 may deteriorate.

[0196] The distance L3 is shorter than the distance L6 from the second coil 121b to the USB-Type-C receptacle connector 320a. As a result, the second locking member 332 dissipates more heat generated by the second coil 121b disposed closer than the heat generated by the USB-Type-C receptacle connector 320a. By arranging the second coil 121b with a large heat generation amount close to the second locking member 332, the heat dissipation efficiency of the substrate 300 is increased.

[0197] If distance L6 is shorter than distance L3, heat generated by second coil 121b, which is a heat source, and USB-Type-C receptacle connector 320a will be dissipated by second locking member 332, which may result in poor heat dissipation efficiency of board 300.

[0198] Also, the distance L6 is shorter than the distance L5. As described above, the USB-Type-C receptacle connector 320a supports USB PD, and the USB-Type-C receptacle connector 320b does not support USB PD. That is, the power consumption of the second power supply circuit 12b is greater than the power consumption of the first power supply circuit 12a. For this reason, it is preferable that the distance L6 from the second coil 121b included in the second power supply circuit 12b to the USB-Type-C receptacle connector 320a is shorter than the distance L5 from the first coil 121a included in the first power supply circuit 12a to the USB-Type-C receptacle connector 320b. When the second power supply circuit 12b supplies power to the USB-Type-C receptacle connector 320a, the loss of power supplied from the second power supply circuit 12b is suppressed.

[0199] Also, the distance L4 is shorter than the distance L2. Since the USB-Type-C receptacle connector 320a supports USB PD and the USB-Type-C receptacle connector 320b does not support USB PD, the amount of heat generated by the USB-Type-C receptacle connector 320a is greater than the amount of heat generated by the USB-Type-C receptacle connector 320b. For this reason, it is preferable to make the distance L4 from the second locking member 332 to the USB-Type-C receptacle connector 320a shorter than the distance L2 from the first locking member 331 to the USB-Type-C receptacle connector 320b, so that the USB-Type-C receptacle connector 320a, which generates a large amount of heat, is disposed in a position that makes it easier to dissipate heat within the limited mounting surface 301 of the board 300. As a result, there is an effect of dissipating heat from the entire board 300.

[0200] Also, the distance L1 is shorter than the distance L7. Therefore, while suppressing the influence of the heat generated by the second coil 121b on the USB hub 53, the first locking member 331 can efficiently dissipate the heat generated by the first coil 121a.

[0201] Also, the distance L3 is shorter than the distance L7. Therefore, while suppressing the influence of the heat generated by the first coil 121a on the USB hub 53, the second locking member 332 can efficiently dissipate the heat generated by the second coil 121b.

[0202] Incidentally, when the distance L7 is increased, that is, by separating the first coil 121a and the second coil 121b, which generate a large amount of heat, among the components mounted on the substrate 300, the heat generation locations on the substrate 300 can be dispersed, and the heat dissipation efficiency can be improved.

[0203] 1-7. USB Cable With reference to FIG. 18, the state in which the USB-Type-C cables 400a, 400b, the USB-Type-A cables 400c, 400d, and the USB-Type-B cable 400e are connected to the connector portion 220 will be described. FIG. 18 is a diagram showing the USB-Type-C cables 400a, 400b, the USB-Type-A cables 400c, 400d, and the USB-Type-B cable 400e and the connector portion 220.

[0204] The USB-Type-C cable 400a includes a plug 401a, a covering portion 402a, and a connection cable 407a. The plug 401a is electrically connected to the connection cable 407a, and the connection portion thereof is covered by the covering portion 402a. The plug 401a is exposed from the end portion 403a of the covering portion 402a and is connected to the USB-Type-C receptacle connector 320a. Specifically, the plug 401a of the USB-Type-C cable 400a is inserted into the USB-Type-C receptacle connector 320a through the opening 220a.

[0205] The USB-Type-C cable 400b includes a plug 401b, a covering portion 402b, and a connection cable 407b. The plug 401b is electrically connected to the connection cable 407b, and the connection portion thereof is covered by the covering portion 402b. The plug 401b is exposed from the end portion 403b of the covering portion 402b and is connected to the USB-Type-C receptacle connector 320b. Specifically, the plug 401b of the USB-Type-C cable 400b is inserted into the USB-Type-C receptacle connector 320b through the opening 220b.

[0206] The USB-Type-A cable 400c includes a plug 401c, a covering portion 402c, and a connection cable 407c. The plug 401c is electrically connected to the connection cable 407c, and the connection portion thereof is covered by the covering portion 402c. The plug 401c is exposed from the end portion 403c of the covering portion 402c and is connected to the USB-Type-A receptacle connector 320c. Specifically, the plug 401c of the USB-Type-A cable 400c is inserted into the USB-Type-A receptacle connector 320c through the opening 220c.

[0207] The USB-Type-A cable 400d includes a plug 401d, a covering portion 402d, and a connection cable 407d. The plug 401d is electrically connected to the connection cable 407d, and the connection portion thereof is covered by the covering portion 402d. The plug 401d is exposed from the end portion 403d of the covering portion 402d and is connected to the USB-Type-A receptacle connector 320d. Specifically, the plug 401d of the USB-Type-A cable 400d is inserted into the USB-Type-A receptacle connector 320d through the opening 220d.

[0208] The USB-Type-B cable 400e includes a plug 401e, a covering part 402e, and a connection cable 407e. The plug 401e is electrically connected to the connection cable 407e, and the connection part thereof is covered by the covering part 402e. The plug 401e is exposed from the end part 403e of the covering part 402e and is connected to the USB-Type-B receptacle connector 320e. Specifically, the plug 401e of the USB-Type-B cable 400e is inserted into the USB-Type-B receptacle connector 320e through the opening 220e.

[0209] The length Xc of the exposed part of the plugs 401a and 401b of the USB-Type-C cables 400a and 400b is shorter than the length Xa of the exposed part of the plugs 401c and 401d of the USB-Type-A cables 400c and 400d.

[0210] For example, when the USB-Type-A receptacle connectors 320c and 320d and the USB-Type-C receptacle connectors 320a and 320b are arranged side by side along the same side, and when the USB-Type-A cables 400c and 400d are inserted into the USB-Type-A receptacle connectors 320c and 320d, if the end parts 403c and 403d of the USB-Type-A cables 400c and 400d contact the first connector surface 221, there is a possibility that the plugs 401a and 401b of the USB-Type-C cables 400a and 400b cannot be inserted into the USB-Type-C receptacle connectors 320a and 320b.

[0211] This is because the length Xc of the exposed part of the plugs 401a and 401b of the USB-Type-C cables 400a and 400b is shorter than the length Xa of the exposed part of the plugs 401c and 401d of the USB-Type-A cables 400c and 400d, and due to this short part, the plugs 401a and 401b of the USB-Type-C cables 400a and 400b cannot be inserted into the USB-Type-C receptacle connectors 320a and 320b. In other words, the USB-Type-C cables 400a and 400b may be in a so-called half-inserted state.

[0212] To reduce the risk of the above half-inserted state, the USB-Type-C receptacle connectors 320a and 320b are arranged closer to the first connector surface 221 than the USB-Type-A receptacle connectors 320c and 320d. Specifically, the USB-Type-C receptacle connectors 320a and 320b are arranged along the first side 311 of the substrate 300, and the USB-Type-A receptacle connectors 320c and 320d are arranged along the second side 312 of the substrate 300.

[0213] If there is no step A between the first side 311 and the second side 312 of the substrate 300, the USB-Type-A receptacle connectors 320c and 320d are arranged at a position farther from the first connector surface 221 than the USB-Type-C receptacle connectors 320a and 320b. In this case, gaps are formed between the openings 220c and 220d and the USB-Type-A receptacle connectors 320c and 320d, and foreign objects such as dust and insects may enter the connector part 220 through the gaps and adhere to the mounting surface 301 of the substrate 300.

[0214] By providing the step A between the first side 311 and the second side 312 of the substrate 300, the gaps between the openings 220c and 220d and the USB-Type-A receptacle connectors 320c and 320d become smaller, and the openings 220c and 220d coincide with the insertion ports of the USB-Type-A receptacle connectors 320c and 320d. Thereby, the risk of adhering to the mounting surface 301 of the substrate 300 is reduced.

[0215] Referring to FIGS. 19 and 20, the case where the USB-Type-C cables 400a and 400b and the USB-Type-A cables 400c and 400d are inserted into the connector part 220 will be described. FIG. 19 shows the first state, and FIG. 20 shows the second state. Also, the direction in which the USB-Type-C cables 400a and 400b and the USB-Type-A cables 400c and 400d are inserted into the connector part 220 is defined as the first direction.

[0216] In explaining FIGS. 19 and 20, distances D1 to D4 are defined as follows. Unless otherwise specified, distances D1 to D4 refer to the shortest distances between them. Distance D1 is the distance from the first side 311 of the substrate 300 to the inner surface of the first connector surface 221. Distance D2 is the distance from the second side 312 of the substrate 300 to the inner surface of the first connector surface 221. Distance D3 is the distance from the insertion openings of the USB-Type-C receptacle connectors 320a, 320b to the ends 403a, 403b of the USB-Type-C cables 400a, 400b. Distance D4 is the distance from the insertion openings of the USB-Type-A receptacle connectors 320c, 320d to the ends 403c, 403d of the USB-Type-A cables 400c, 400d.

[0217] As shown in FIG. 19, in the first state, the distance D1 from the inner surface of the first connector surface 221 to the first side 311 is shorter than the distance D2 from the inner surface of the first connector surface 221 to the second side 312, and the difference between distance D2 and distance D1 is equal to or greater than the difference between distance D4 and distance D3. This relationship of distances D1, D2, D3, and D4 is defined as condition 1. To satisfy this condition 1, when the USB-Type-C receptacle connectors 320a, 320b and the USB-Type-A receptacle connectors 320c, 320d are arranged side by side, the possibility of the above-described half-inserted state is reduced.

[0218] Also, as shown in FIG. 20, in the second state, the substrate 300 may be arranged to face the first connector surface 221 such that the first side 311 contacts the inner surface of the first connector surface 221. In this case, in addition to reducing the possibility of the above-described half-inserted state, the alignment between the substrate 300 and the first connector surface 221 becomes easier with respect to the first side 311.

[0219] Further, the ends 403a and 403b of the USB-Type-C cables 400a and 400b and the ends 403c and 403d of the USB-Type-A cables 400c and 400d may be in contact with the outer surface of the first connector surface 221. In this case, in addition to reducing the possibility of the above-described half-inserted state, by inserting the USB-Type-C cables 400a and 400b and the USB-Type-A cables 400c and 400d into the connector portion 220, the gaps of the openings 220a, 220b and the openings 220c, 220d are reduced, so that the possibility of foreign matters such as dust and insects entering the connector portion 220 is reduced.

[0220] In the second state, the distance D1 from the inner surface of the first connector surface 221 to the first side 311 is zero, and since the difference between the distance D4 and the distance D3 is zero, the difference between the distance D2 and the distance D1 is equal to or greater than the difference between the distance D4 and the distance D3. Since the second state also satisfies the first condition, the same effect as the first state can be obtained.

[0221] The USB-Type-C receptacle connectors 320a and 320b are smaller than other receptacle connectors, for example, the USB-Type-A receptacle connectors 320c and 320d. Therefore, the ground contact area with the mounting surface 301 of the substrate 300 is also smaller than that of the USB-Type-A receptacle connectors 320c and 320d. For this reason, it is preferable that the entire USB-Type-C receptacle connectors 320a and 320b are arranged on the mounting surface 301 of the substrate 300. For example, when the USB-Type-C receptacle connectors 320a and 320b are arranged so as to protrude from the substrate 300, a sufficient ground contact area with the mounting surface 301 of the substrate 300 cannot be ensured, and the connectors become vulnerable to external force loads such as kinking of the plugs 401a and 401b of the USB-Type-C cables 400a and 400b.

[0222] As shown in FIGS. 18 to 20, by arranging the insertion ports of the USB-Type-C receptacle connectors 320a and 320b along the first side 311 of the substrate 300, a sufficient ground contact area between the USB-Type-C receptacle connectors 320a and 320b and the mounting surface 301 of the substrate 300 can be ensured. For this reason, a step A is provided between the first side 311 and the second side 312 of the substrate 300, and the USB-Type-C receptacle connectors 320a and 320b are arranged along the first side 311 protruding more than the second side 312. In this way, the USB-Type-C receptacle connectors 320a and 320b can secure a ground contact area with the mounting surface 301 of the substrate 300 while reducing the distance between its insertion port and the first connector surface 221. As a result, the possibility that the plugs 401a and 401b of the USB-Type-C cables 400a and 400b become the above-described semi-insertion with respect to the USB-Type-C receptacle connectors 320a and 320b can be suppressed.

[0223] 1-8. Fixing of USB-Type-C Receptacle Connector The USB-Type-C receptacle connector 320a will be described with reference to FIG. 21. FIG. 21 is a perspective view of the USB-Type-C receptacle connector 320a. The USB-Type-C receptacle connector 320b will be described with reference to FIG. 22. FIG. 22 is a perspective view of the USB-Type-C receptacle connector 320b. Note that the USB-Type-C receptacle connector 320b has the same configuration as the USB-Type-C receptacle connector 320a.

[0224] The USB-Type-C receptacle connector 320a includes first portions 322a, second portions 323a, connection portions 324a and 325a, and protrusion portions 327a and 328a.

[0225] The first part 322a is formed in a planar shape and constitutes the bottom surface of the USB-Type-C receptacle connector 320a. Also, the second part 323a is formed in a planar shape, faces the first part 322a, and constitutes the top surface of the USB-Type-C receptacle connector 320a. The connecting parts 324a, 325a are curved and connect the first part 322a and the second part 323a, respectively. Also, the connecting parts 324a, 325a constitute the side surfaces of the USB-Type-C receptacle connector 320a.

[0226] Similar to the USB-Type-C receptacle connector 320a, the USB-Type-C receptacle connector 320b includes a third part 322b, a fourth part 323b, connecting parts 324b, 325b, and protruding parts 327b, 328b.

[0227] The third part 322b is formed in a planar shape and constitutes the bottom surface of the USB-Type-C receptacle connector 320b. Also, the fourth part 323b is formed in a planar shape and faces the third part 322b and constitutes the top surface of the USB-Type-C receptacle connector 320b. The connecting parts 324b, 325b are curved and connect the third part 322b and the fourth part 323b, respectively. Also, the connecting parts 324b, 325b constitute the side surfaces of the USB-Type-C receptacle connector 320b.

[0228] When the USB-Type-C receptacle connector 320a is mounted on the substrate 300, the first part 322a that constitutes the bottom surface contacts the mounting surface 301 of the substrate 300, and the second part 323a that constitutes the top surface is pressed by the prevention part 340a shown in FIG. 23, and the USB-Type-C receptacle connector 320a is fixed so as not to peel off from the mounting surface 301.

[0229] When the USB-Type-C receptacle connector 320b is mounted on the substrate 300, the third portion 322b constituting the bottom surface contacts the mounting surface 301 of the substrate 300, and the fourth portion 323b constituting the upper surface is pressed by the prevention portion 340b shown in FIG. 23, so that the USB-Type-C receptacle connector 320b is fixed so as not to peel off from the mounting surface 301.

[0230] Also, the USB-Type-C receptacle connector 320a has an opening 321a and a back surface 326a. The plug 401a of the USB-Type-C cable 400a is inserted through the opening 321a and contacts pins (not shown) provided inside the USB-Type-C receptacle connector 320a. These pins are provided, for example, on the back surface 326a and are electrically connected to and controlled by the USB controller 34. Thereby, the external device 10a connected to the printing apparatus 2 by the USB-Type-C cable 400a and the printing apparatus 2 can communicate with each other.

[0231] The protrusions 327a and 328a fix the USB-Type-C receptacle connector 320a to the mounting surface 301 of the substrate 300. For example, when mounting the USB-Type-C receptacle connector 320a on the mounting surface 301 of the substrate 300, the first portion 322a constituting the bottom surface and the mounting surface 301 may be fixed by an adhesive such as an adhesive, or the two protrusions 327a and 328a may be fixed by piercing the substrate 300. Thereby, the USB-Type-C receptacle connector 320a is fixed to the substrate 300, and the risk of peeling from the substrate 300 is reduced.

[0232] Note that the USB-Type-C receptacle connector 320a preferably has a plurality of protrusions. When the plurality of protrusions provided on the USB-Type-C receptacle connector 320a pierce the mounting surface 301, the risk of the USB-Type-C receptacle connector 320a peeling from the substrate 300 is further reduced. Note that the protrusions 327a and 328a are an example of the plurality of protrusions.

[0233] Referring to FIGS. 23 and 24, the prevention portions 340a and 340b will be described.

[0234] FIG. 23 is a diagram showing the prevention portions 340a and 340b when the first connector surface 221 is viewed in plan view. FIG. 24 is an exploded perspective view of the prevention portion 340a and the USB-Type-C receptacle connector 320a.

[0235] As shown in FIG. 23, the prevention portions 340a and 340b are housed inside the connector portion 220, and press and fix the USB-Type-C receptacle connectors 320a and 320b, respectively. Further, when the protruding portions 327a and 328a of the USB-Type-C receptacle connector 320a pierce the substrate 300, the USB-Type-C receptacle connector 320a is fixed to the substrate 300. Note that the prevention portion 340a is an example of the first prevention portion, and the prevention portion 340b is an example of the second prevention portion. The prevention portion 340a is an example of the first prevention portion, and the prevention portion 340b is an example of the second prevention portion.

[0236] The prevention portions 340a and 340b include metal L-shaped members 450a and 450b and conductive soft gaskets 500a and 500b. The L-shaped members 450a and 450b are made of metal and are fixed to the first connector surface 221 by screws 350a and 350b. That is, the L-shaped members 450a and 450b are screwed to the first connector surface 221. Thereby, the potentials of the prevention portions 340a and 340b are fixed, and for example, there are effects of removing static electricity charged to the USB-Type-C receptacle connectors 320a and 320b and protecting the USB-Type-C receptacle connectors 320a and 320b from electromagnetic noise. Note that the L-shaped member 450a is an example of the first L-shaped member, and the L-shaped member 450b is an example of the second L-shaped member.

[0237] The soft gaskets 500a and 500b are stretchable members such as sponges, and are joined to the light angle members 450a and 450b by an adhesive such as double-sided tape. The soft gaskets 500a and 500b shown in FIG. 23 block the space between the light angle members 450a and 450b and the USB-Type-C receptacle connectors 320a and 320b. That is, the soft gaskets 500a and 500b are sandwiched between the light angle members 450a and 450b and the USB-Type-C receptacle connectors 320a and 320b, and are contracted compared to the normal state. Note that the soft gasket 500a is an example of a first soft gasket, and the soft gasket 500b is an example of a second soft gasket.

[0238] Therefore, among the members included in the prevention parts 340a and 340b, the soft gaskets 500a and 500b press the USB-Type-C receptacle connectors 320a and 320b, so that the prevention parts 340a and 340b fix the USB-Type-C receptacle connectors 320a and 320b. Since the soft gasket 500a is a stretchable member, when pressing the USB-Type-C receptacle connector 320a, the USB-Type-C receptacle connector 320a can be installed without being damaged.

[0239] FIG. 24 is an exploded perspective view of the prevention part 340a and the USB-Type-C receptacle connector 320a. Since the light angle member 450b has the same structure as the light angle member 450a, the description of the light angle member 450a is used as a substitute. The light angle member 450a has joint surfaces 451a, screw holes 452a, side surfaces 453a and 454a, an upper surface 455a, and a back surface 456a.

[0240] The joint surface 451a and the upper surface 455a are formed in a plate shape and are perpendicular to each other. The screw hole 452a is provided in the joint surface 451a. By engaging the screw hole 452a with the screw 350a, the right-angle member 450a is fixed to the first connector surface 221. That is, the metal right-angle member 450a is screwed to the first connector surface 221.

[0241] As described above, the soft gasket 500a has conductivity. When the metal right-angle member 450a is screwed to the first connector surface 221, the soft gasket 500a has the same potential as the first connector surface 221. Therefore, the potential of the USB-Type-C receptacle connector 320a pressed by the soft gasket 500a is stabilized and becomes resistant to noise and static electricity.

[0242] When the right-angle member 450a is fixed to the first connector surface 221, the upper surface 455a is parallel to the mounting surface 301 of the substrate 300. That is, the upper surface 455a is parallel to the first portion 322a constituting the bottom surface of the USB-Type-C receptacle connector 320a and the second portion 323a constituting the upper surface.

[0243] The soft gasket 500a is fitted into the space S defined by the side surfaces 453a, 454a, the upper surface 455a, and the back surface 456a of the right-angle member 450a. As shown in FIG. 24, the size of the space S is approximately the width W, the depth D, and the height H.

[0244] Among the members included in the prevention part 340a, the soft gasket 500a presses the second part 323a that constitutes the upper surface of the USB-Type-C receptacle connector 320a, so that the prevention part 340a fixes the USB-Type-C receptacle connector 320a. Therefore, it is preferable that the soft gasket 500a contacts the second part 323a that constitutes the upper surface of the USB-Type-C receptacle connector 320a to increase the contact area. That is, it is preferable that there is no gap between the soft gasket 500a and the 323a that constitutes the upper surface of the USB-Type-C receptacle connector 320a as much as possible.

[0245] Specifically, the width Wa of the soft gasket 500a is made larger than the width W of the space S, and it is preferable that the soft gasket 500a is compressed by the side surfaces 453a and 454a of the right angle member 450a. In the direction of the width Wa, by increasing the area where the soft gasket 500a presses the second part 323a that constitutes the upper surface of the USB-Type-C receptacle connector 320a, the soft gasket 500a firmly fixes the USB-Type-C receptacle connector 320a to the substrate 300.

[0246] Also, the height Ha of the soft gasket 500a is made larger than the height H. Specifically, it is preferable that the soft gasket 500a contacts at least the second part 323a that constitutes the upper surface of the USB-Type-C receptacle connector 320a. Since the soft gasket 500a shrinks, it is preferable to increase the height Ha of the soft gasket 500a so that the soft gasket 500a can press the second part 323a that constitutes the upper surface of the USB-Type-C receptacle connector 320a.

[0247] Note that the depth Da of the soft gasket 500a is preferably not made too large. When the depth Da of the soft gasket 500a is increased, in the depth Da direction, the area where the soft gasket 500a presses the second portion 323a constituting the upper surface of the USB-Type-C receptacle connector 320a can be increased. However, if the depth Da of the soft gasket 500a is made too large, there is a possibility that the compressed soft gasket 500a may reach the vicinity of the opening 321a of the USB-Type-C receptacle connector 320a. Therefore, the depth Da of the soft gasket 500a is preferably about the same size as the depth D. More preferably, the soft gasket 500a is preferably sized to fit within the space S.

[0248] In a state where the compressed soft gasket 500a reaches the vicinity of the opening 321a of the USB-Type-C receptacle connector 320a, the plug 401a of the USB-Type-C cable 400a may contact the compressed soft gasket 500a. Since the potential of the plug 401a of the USB-Type-C cable 400a and the potential of the compressed soft gasket 500a are not necessarily the same, for example, it may cause malfunction or failure of the external device 10a connected by the USB-Type-C cable 400a.

[0249] 2. Modification 2-1. Modification 1 Referring to FIG. 25, a modification 1 of the connector portion 220 of the present embodiment will be described. A configuration example of the connector portion 2201 in the modification 1 will be described. In describing the modification 1, the same components as those in the present embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified. FIG. 25 is a plan view of the first connector surface 221 and the second connector surface 222 of the connector portion 220 of the modification 2.

[0250] The arrangement of the plurality of connectors provided on the second connector surface 222 of the connector portion 2201 of Modification 1 is different from that of the present embodiment in that the positions of the USB-Type-B receptacle connector 320e and the power connector 320f are different.

[0251] Specifically, in the present embodiment, the power connector 320f is arranged between the DK receptacle connector 320g and the USB-Type-B receptacle connector 320e. In Modification 1, the USB-Type-B receptacle connector 320e is arranged between the DK receptacle connector 320g and the power connector 320f.

[0252] Since the risk of misinsertion is lower for the USB-Type-B receptacle connector 320e than for the DK receptacle connector 320g, such an arrangement may be acceptable. That is, even when it is difficult to visually confirm or when operating blindly, the user can correctly recognize the position of the USB-Type-B receptacle connector 320e, reducing the risk of misinsertion into the DK receptacle connector 320g.

[0253] 2-2. Modification 2 With reference to FIG. 26, Modification 2 of the substrate 300 of the present embodiment will be described. A configuration example of the substrate 300a in Modification 2 will be described. In describing Modification 2, the same components as those in the present embodiment are denoted by the same reference numerals, and their descriptions are omitted or simplified. FIG. 26 is a schematic diagram of the substrate 300a of Modification 2.

[0254] Unlike the present embodiment, the substrate 300a of Modification 2 includes a slot 320h. Specifically, in the substrate 300 of the present embodiment, a USB-Type-C receptacle connector 320a is arranged, while the substrate 300a of Modification 2 includes a slot 320h into which a memory card can be inserted instead of the USB-Type-C receptacle connector 320a. The slot 320h is controlled by the CPU 31 via the system bus 41, and data rewriting of the memory card is performed. For example, the slot 320h is compatible with an SD card, a micro SD card, etc.

[0255] By operating the smart device 3a connected to the USB-Type-C interface 60a, the user can store accounting information in the memory card. Further, the smart device 3a can cause the printing device 2 to execute printing based on the data stored in the memory card. For example, the printing device 2 can print accounting information and the like stored in the memory card.

[0256] Also, unlike the present embodiment, the second power circuit 12b may supply power to the USB-Type-C receptacle connector 320b. In this case, the USB-Type-C receptacle connector 320b can also be used as a connector compatible with USB PD.

[0257] 3. Electronic device The electronic device 500 according to the present embodiment will be described with reference to FIG. 27. FIG. 27 is a functional block diagram showing a schematic configuration of the electronic device 500 of the present embodiment.

[0258] The electronic device 500 may include a semiconductor integrated circuit 505, a CPU 510, an operation unit 520, a ROM 530, a RAM 540, a communication unit 550, a display unit 560, and an audio output unit 570. Note that the electronic device 500 may have a configuration in which some of these elements are omitted or changed, or other elements are added.

[0259] The semiconductor integrated circuit 505 performs various processes in response to commands from the CPU 510. For example, the semiconductor integrated circuit 505 corrects the input data or converts the data format in response to commands from the CPU 510.

[0260] The CPU 510 performs various arithmetic processes and control processes using data and the like supplied from the semiconductor integrated circuit 505 in accordance with programs stored in the ROM 530 and the like. For example, the CPU 510 performs various data processes in response to operation signals supplied from the operation unit 520, controls the communication unit 550 to perform data communication with the outside, generates an image signal for displaying various images on the display unit 560, or generates an audio signal for outputting various audio to the audio output unit 570.

[0261] The operation unit 520 is an input device including, for example, operation keys and button switches, and outputs an operation signal corresponding to an operation by the user to the CPU 510. The ROM 530 stores programs, data, and the like for the CPU 510 to perform various arithmetic processes and control processes. The RAM 540 is used as a work area for the CPU 510 and temporarily stores programs and data read from the ROM 530, data input using the operation unit 520, or arithmetic results obtained by the CPU 510 executing programs.

[0262] The communication unit 550 is composed of, for example, an analog circuit and a digital circuit, and performs data communication between the CPU 510 and an external device. The display unit 560 includes, for example, an LCD (Liquid Crystal Display) and the like, and displays various information based on a display signal supplied from the CPU 510. The audio output unit 570 includes, for example, a speaker and the like, and outputs audio based on an audio signal supplied from the CPU 510.

[0263] As described above, the electronic device 500 may be, for example, a printing apparatus including a printing unit 20 that performs printing on a medium P. Further, for example, the electronic device 500 may be a projector, an electronic dictionary, an electronic game device, a mobile terminal such as a mobile phone, a digital still camera, a digital movie, a television, a recorder, a security monitor, a head-mounted display, a personal computer, a network device, a car navigation device, a measuring device, and a medical device (for example, an electronic thermometer, a blood pressure monitor, a blood glucose meter, an electrocardiogram measuring device, an ultrasonic diagnostic device, and an electronic endoscope), etc.

[0264] The USB-Type-C receptacle connector 320b is an example of a first receptacle connector. The external device 10b is an example of a first external device. The USB-Type-C receptacle connector 320a is an example of a second receptacle connector. The USB-Type-A receptacle connector 320c is an example of a third receptacle connector. The USB-Type-B receptacle connector 320e is an example of a fourth receptacle connector. The plug 401b of the USB-Type-C cable 400b is an example of a first plug of a first cable. The plug 401a of the USB-Type-C cable 400a is an example of a second plug of a second cable. The plug 401c of the USB-Type-A cable 400c is an example of a third plug of a third cable. The plug 401e of the USB-Type-B cable 400e is an example of a fourth plug of a fourth cable.

[0265] As described above, the embodiments and modification examples have been explained, but the present invention is not limited to these embodiments and can be implemented in various forms without departing from the gist thereof. For example, it is also possible to appropriately combine the above-described embodiments.

[0266] The present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations having the same functions, methods, and results, or configurations having the same objectives and effects). The present invention also includes configurations in which non-essential portions of the configurations described in the embodiments are replaced. The present invention also includes configurations that exhibit the same operational effects as the configurations described in the embodiments or configurations that can achieve the same objectives. The present invention also includes configurations in which known technologies are added to the configurations described in the embodiments.

[0267] The following content is derived from the above-described embodiments and variations.

[0268] One aspect of the electronic device is a substrate, a main body case, a first locking member and a second locking member for fixing the substrate and the main body case, and includes wherein the substrate is a first receptacle connector connectable to a first plug of a first cable, a second receptacle connector connectable to a second plug of a second cable, a first coil for supplying power to the first receptacle connector, a second coil for supplying power to the second receptacle connector, is provided, the first receptacle connector is a first USB-Type-C receptacle connector, the second receptacle connector is a second USB-Type-C receptacle connector, the first cable is a first USB-Type-C cable, the second cable is a second USB-Type-C cable, a distance L1 from the first locking member to the first coil is shorter than a distance L2 from the first locking member to the first receptacle connector, a distance L3 from the second locking member to the second coil is shorter than a distance L4 from the second locking member to the second receptacle connector.

[0269] According to this electronic device, the heat generation amount of the first coil is larger than the heat generation amount of the first receptacle connector. Therefore, by arranging the first coil closer to the first locking member than the second receptacle connector, the heat dissipation effect of the substrate can be enhanced. Similarly, the heat generation amount of the second coil is larger than the heat generation amount of the second receptacle connector. Therefore, by arranging the second coil closer to the second locking member than the first receptacle connector, the heat dissipation effect of the substrate can be enhanced.

[0270] One aspect of the electronic device is The distance L1 is shorter than the distance L5 from the first coil to the first receptacle connector, The distance L3 may be shorter than the distance L6 from the second coil to the second receptacle connector.

[0271] According to this electronic device, the first locking member dissipates more heat generated by the first coil disposed closer than the heat generated by the second receptacle connector. Also, when viewed from the first locking member, the second receptacle connector 320 is disposed on the opposite side of the first coil Therefore, the heat generation by the second receptacle connector has little influence on the first locking member. By arranging the first coil with a large heat generation amount close to the first locking member, the heat dissipation efficiency of the substrate can be enhanced. Similarly, the second locking member dissipates more heat generated by the second coil disposed closer than the heat generated by the first receptacle connector. Also, when viewed from the second locking member 332, the first receptacle connector is disposed on the opposite side of the second coil, so the heat generation by the first receptacle connector has little influence on the second locking member. By arranging the second coil with a large heat generation amount close to the second locking member, the heat dissipation efficiency of the substrate is increased.

[0272] One aspect of the electronic device is The first coil supplies a constant power to the first receptacle connector, The second coil supplies variable power to the second receptacle connector, The distance L6 may be shorter than the distance L5.

[0273] According to this electronic device, the first electric circuit does not support USB PD, and the first coil included in the first power supply circuit supplies constant power to the second receptacle connector. Since the second power supply circuit supports USB PD, the second coil included in the second power supply circuit supplies variable power to the first receptacle connector. Similarly, since the first receptacle connector has a larger power consumption and a larger heat generation amount than the second receptacle connector, the second coil that supplies power to the first receptacle connector is arranged closer to the first receptacle connector than to the second receptacle connector, thereby improving the efficiency of power transmission.

[0274] One aspect of the electronic device is equipped with a USB hub that controls the first receptacle connector, The USB hub may be arranged between the first coil and the second coil.

[0275] According to this electronic device, the USB hub is arranged between the first power supply circuit including the first coil with a large heat generation amount and the second power supply circuit including the second coil. Thereby, the influence of the heat generation of the first power supply circuit and the second power supply circuit on the USB hub can be reduced.

[0276] One aspect of the electronic device is equipped with a third receptacle connector connectable to a third plug of a third cable, The third receptacle connector is a USB-Type-A receptacle connector, The third cable is a USB-Type-A cable, The first coil may supply power to the third receptacle connector.

[0277] According to this electronic device, the first power supply circuit including the first coil supplies power not only to the first receptacle connector but also to the third receptacle connector. Thereby, the power supply circuit can be shared, and the configuration of the components mounted on the substrate can be simplified.

[0278] One aspect of the electronic device is provided with a fourth receptacle connector connectable to the fourth plug of the fourth cable, the fourth receptacle connector is a USB-Type-B receptacle connector, the first coil may supply power to the fourth receptacle connector.

[0279] According to this electronic device, the first power supply circuit including the first coil supplies power not only to the first receptacle connector but also to the fourth receptacle connector. Thereby, the power supply circuit can be shared, and the configuration of the components mounted on the substrate can be simplified.

[0280] One aspect of the electronic device is the USB hub may control the first receptacle connector, the third receptacle connector, and the fourth receptacle connector.

[0281] According to this electronic device, the USB hub can control the first receptacle connector, the third receptacle connector, and the fourth receptacle connector together. That is, with one USB hub, a plurality of receptacle connectors not compatible with USB PD can be controlled, so that the configuration of the components mounted on the substrate can be simplified.

[0282] One aspect of the electronic device is may include a printing unit that performs printing on a medium.

[0283] According to this electronic device, since it includes a printing unit, the electronic device can be used as a printing device.

Description of Reference Numerals

[0284] 1…Printing system, 2…Printing device, 3a…Smart device, 3b…Customer display, 3c…Handheld scanner, 4a…USB cable, 4b…USB cable, 4c…USB cable, 5…Power cable, 10a…External device, 10b…External device, 10c…External device, 10d…External device, 10e…External device, 11…Display unit, 12…Power circuit, 12a…First power circuit, 12b…Second power circuit, 13…Media discharge port, 20…Printing unit, 21…Thermal head, 22…Printing head drive unit, 23…Conveying unit, 24…Cutting unit, 25…Heating element, 26…Thermal roll paper, 30…Control unit, 31…CPU, 32…RAM, 33…ROM, 34…USB controller, 35…Non-volatile memory, 36…Wireless communication unit, 39…Image processing unit, 41…System bus, 42…Image bus, 50…USB communication unit, 53…USB hub, 54…PD controller, 60…USB interface, 121a…First coil, 121b…Second coil, 122a…First integrated circuit, 122b…Second integrated circuit, 200…Main body case, 200a…First case surface, 200b…Second case surface, 200c…Third case surface, 200d…Fourth case surface, 200e…Fifth case surface, 200f…Sixth case surface, 201…Power switch, 202…Opening / closing lever, 203…Opening / closing door, 204…Feed switch, 205…First main body frame surface, 206…Second main body frame surface, 210…Media storage unit, 215…Routing unit, 220…Connector unit, 221…First connector surface, 222…Second connector surface, 241…Bottom cover, 242…Cover-side engaging portion, 246…Rear cover, 247…Cover-side engaging portion, 255…Cable outlet, 270…Cash drawer, 273…Drawer tray, 274…Keyhole, 275…Drawer kick cable, 280…Buzzer, 281…Volume adjustment knob, 283…Speaker, 300…Substrate, 301…Mounting surface, 311…First side, 312…Second side, 313…Third side, 340a…Preventing portion, 340b…Preventing portion, 341…Device controller, 342…Host controller, 450a…Light angle member, 450b…Light angle member, 500…Electronic device

Claims

1. A substrate, a main body case, a first locking member and a second locking member for fixing the substrate and the main body case, and are provided with, the substrate is, a first receptacle connector connectable to a first plug of a first cable, a second receptacle connector connectable to a second plug of a second cable, a first coil for supplying power to the first receptacle connector, a second coil for supplying power to the second receptacle connector, is provided, the first receptacle connector is a first USB-Type-C receptacle connector, the second receptacle connector is a second USB-Type-C receptacle connector, the first cable and the second cable are USB-Type-C cables, a distance L1 from the first locking member to the first coil is shorter than a distance L2 from the first locking member to the first receptacle connector, an electronic device, characterized in that a distance L3 from the second locking member to the second coil is shorter than a distance L4 from the second locking member to the second receptacle connector.

2. The distance L1 is shorter than a distance L5 from the first coil to the first receptacle connector, The electronic device according to claim 1, characterized in that the distance L3 is shorter than a distance L6 from the second coil to the second receptacle connector.

3. The first coil supplies a constant power to the first receptacle connector, the second coil supplies a variable power to the second receptacle connector, The electronic device according to claim 2, characterized in that the distance L6 is shorter than the distance L5.

4. Comprising a USB hub for controlling the first receptacle connector, The electronic device according to any one of claims 1 to 3, characterized in that the USB hub is disposed between the first coil and the second coil.

5. Comprising a third receptacle connector connectable to a third plug of a third cable, the third receptacle connector is a USB-Type-A receptacle connector, the third cable is a USB-Type-A cable, The electronic device according to claim 4, characterized in that the first coil supplies power to the third receptacle connector.

6. Comprising a fourth receptacle connector connectable to a fourth plug of a fourth cable, The fourth receptacle connector is a USB-Type-B receptacle connector, The electronic device according to claim 5, wherein the first coil supplies power to the fourth receptacle connector.

7. The USB hub controls the first receptacle connector, the third receptacle connector, and the fourth receptacle connector. The electronic device according to claim 6.

8. The electronic device according to any one of claims 1 to 7, further comprising a printing unit that performs printing on a medium.

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