Connection method, power supply system, connector unit and power supply unit

Abstract

To provide a connection method capable of supplying prescribed voltage for a connector unit from a power supply unit with a simple structure.SOLUTION: A power supply unit 20 and a connector unit 30 are provided with power source ports 2611, 3211 and ground ports 2613, 3213 respectively. In at least either connection between the power source port 2611 of the power supply unit 20 and the power source port 3211 of the connector unit 30 or connection between the ground port 2613 of the power supply unit 20 and the ground port 3213 of the connector unit 30, the number of parallel lines in at least a part of a section is changed according to length of the connection. Thus, voltage drop between the power supply unit 20 and the connector unit 30 is adjusted.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a connection method for connecting a power supply unit and a connector unit, a power supply system including a power supply unit and a connector unit, and a connector unit and a power supply unit used in the power supply system. [Background technology]

[0002] Patent Document 1 discloses an example of a power supply device (power supply system) that complies with the USB (Universal Serial Bus) standard. This power supply device is an in-vehicle power supply device.

[0003] 6, the power supply device 90 disclosed in Patent Document 1 includes an in-vehicle device (power supply unit) 92 and a user opening section (connector unit) 94. The in-vehicle device 92 and the user opening section 94 are connected by a cable 96.

[0004] The mounting positions of the on-board device 92 and the user-opening portion 94 in a vehicle (not shown) depend on the structure of the vehicle. Therefore, the distance between the on-board device 92 and the user-opening portion 94, i.e., the length of the cable 96, is likely to differ depending on the vehicle model. This means that the voltage supplied to the user-opening portion 94 may differ depending on the vehicle model. Patent Document 1 further discloses a voltage adjustment method for supplying a predetermined voltage to the user-opening portion 94, regardless of the length of the cable 96. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-10428 Summary of the Invention [Problem to be solved by the invention]

[0006] The voltage adjustment method of Patent Document 1 detects the voltage supplied to the user-opened portion 94 and adjusts the resistance value for output voltage correction in the in-vehicle device 92 based on the detection result. This method has the problem of complicating the configuration of the power supply device 90 and increasing costs. Therefore, there is a need for a power supply system that can supply a predetermined voltage from the power supply unit to the connector unit with a simpler configuration.

[0007] An object of the present invention is to provide a connection method that allows a predetermined voltage to be supplied from a power supply unit to a connector unit with a simpler configuration, to provide a power supply system that employs such a connection method, and to provide a power supply unit and a connector unit that are used in the power supply system. [Means for solving the problem]

[0008] The present invention provides a first connection method for connecting a power supply unit including a power supply circuit to a connector unit including a connector for connecting a user device, the first connection method comprising: The power supply unit and the connector unit are each provided with a power port and a ground port, In at least one of the connection between the power supply port of the power supply unit and the power supply port of the connector unit and the connection between the ground port of the power supply unit and the ground port of the connector unit, the number of parallel lines in at least a part of the section is changed according to the length of the connection, thereby adjusting the voltage drop between the power supply unit and the connector unit. Provide a way to connect.

[0009] The present invention also provides a first power supply system including a power supply unit having a power supply circuit and a connector unit having a connector for connecting a user device, each of the power supply unit and the connector unit is provided with three or more specific ports, each of which is a power port and a ground port; the number of at least one of the power supply ports and the ground ports is plural, By selecting the number of connections between the specific port of the power supply unit and the specific port of the connector unit, it is possible to adjust the electrical resistance between the power supply unit and the connector unit. A power supply system is provided.

[0010] Furthermore, the present invention provides a second power supply system, which is a first power supply system, In each of the power supply unit and the connector unit, a plurality of ports having the same function included in the specific port are connected to each other. A power supply system is provided.

[0011] Furthermore, the present invention provides a third power supply system, which is the first or second power supply system, In each of the power supply unit and the connector unit, the number of the power ports is equal to the number of the ground ports and is two or more. A power supply system is provided.

[0012] Furthermore, the present invention provides a fourth power supply system, which is any one of the first to third power supply systems, the power supply unit includes a power supply circuit that complies with the USB (Universal Serial Bus) standard; The connector unit is provided with a connector that complies with the USB standard. A power supply system is provided.

[0013] Furthermore, the present invention provides a fifth power supply system including a power supply unit having a power supply circuit, a connector unit having a connector for connecting a user device, and a connecting member for connecting the power supply unit and the connector unit, The power supply unit and the connector unit each have a power port and a ground port, the connection member includes a power port connection member that connects the power port of the power supply unit and the power port of the connector unit, and a ground port connection member that connects the ground port of the power supply unit and the ground port of the connector unit, At least one of the power supply port connecting member and the ground port connecting member is selected from a plurality of types of connecting member candidates each having a different number of lines connecting an intermediate section, depending on the distance between the power supply unit and the connector unit. A power supply system is provided.

[0014] The present invention also provides a connector unit for a power supply system that connects, via a cable, a power supply unit having a power supply circuit and a connector unit having a connector for connecting a user device, as a first connector unit, The connector unit is provided with three or more specific ports each consisting of a power supply port and a ground port, which correspond to the three or more specific ports each consisting of a power supply port and a ground port of the power supply unit. A connector unit is provided.

[0015] The present invention also provides a first connector unit as the second connector unit, The connector is a connector conforming to the USB (Universal Serial Bus) standard, The connector unit further includes a communication port; the communication port of the connector unit is connected to the connector within the connector unit; The communication port of the connector unit is connected to a communication port provided in the power supply unit for performing communication conforming to the USB standard. A connector unit is provided.

[0016] The present invention also provides a power supply unit for a power supply system, which connects a power supply unit having a power supply circuit and a connector unit having a connector for connecting a user device via a cable, as a first power supply unit, The power supply unit is provided with three or more specific ports each consisting of a power supply port and a ground port corresponding to the three or more specific ports each consisting of a power supply port and a ground port of the connector unit. A power supply unit is provided.

[0017] Furthermore, the present invention provides a first power supply unit as the second power supply unit, the power supply circuit includes a power supply circuit that complies with the USB (Universal Serial Bus) standard; the power supply unit further includes a communication port; The communication port of the power supply unit is connected to a communication port provided in the connector unit for performing communication conforming to the USB standard. A power supply unit is provided. [Effects of the Invention]

[0018] The connection method according to the present invention adjusts the voltage drop between the power supply unit and the connector unit by changing the number of parallel lines included in the connection depending on the length of the connection between the power supply unit and the connector unit, thereby making it possible to supply a predetermined voltage to the connector unit regardless of the length of the connection between the power supply unit and the connector unit.

[0019] The connection method of the present invention is applied to at least one of the connection between the power port of the power supply unit and the power port of the connector unit, and the connection between the ground port of the power supply unit and the ground port of the connector unit. In addition, the connection method of the present invention is applied to at least a portion of the connection between the power supply unit and the connector unit. This allows the voltage drop between the power supply unit and the connector unit to be adjusted in relatively small intervals.

[0020] It is possible to adjust the voltage drop between the power supply unit and the connector unit by changing the cross-sectional area (diameter) of the cable lines connecting them. However, while increasing the cable line diameter reduces electrical resistance, it may cause wiring problems such as reduced flexibility. In contrast, the present invention selectively combines multiple lines in at least a portion of the cable, making it possible to adjust the electrical resistance or voltage drop between the power supply unit and the connector unit according to the distance without reducing the flexibility of the lines. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a first schematic diagram showing a power supply system according to a first embodiment of the present invention, in which a power supply unit and a connector unit are connected to each other using a first cable. [Figure 2] FIG. 2 is a second schematic diagram illustrating the power supply system of FIG. 1. The power supply unit and the connector unit are connected to each other using a second cable. [Figure 3] FIG. 3 is a third schematic diagram showing the power supply system of FIG. 1. The power supply unit and the connector unit are connected to each other using a third cable. [Figure 4] 10 is a schematic diagram showing a power supply system according to a second embodiment of the present invention, in which a power supply unit and a connector unit are connected to each other using a fourth cable. [Figure 5] FIG. 5 is another schematic diagram showing the power supply system of FIG. 4, in which the power supply unit and the connector unit are connected to each other using a fifth cable. [Figure 6] 1 is a schematic diagram showing a power supply device described in Patent Document 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0022] (First embodiment) 1, a power supply system 10 according to a first embodiment of the present invention includes a power supply unit 20 and a connector unit 30. The power supply unit 20 and the connector unit 30 are connected to each other via a first cable (connecting member) 40.

[0023] As shown in FIG. 1, the power supply unit 20 has an input section 22, a power supply circuit 24, and an output section .

[0024] 1, the input section 22 of the power supply unit 20 is provided with a power supply terminal 221 and a ground terminal 223. The power supply terminal 221 and the ground terminal 223 are connected to an external power supply (not shown) that supplies a predetermined input voltage.

[0025] As shown in FIG. 1 , the output section 26 of the power supply unit 20 is provided with three or more specific ports 261 and communication ports 263. The specific ports 261 include one or more power supply ports 2611 and one or more ground ports 2613. Here, at least one of the power supply ports 2611 and the ground ports 2613 is plural. In this embodiment, the number of power supply ports 2611 and the number of ground ports 2613 are each three. However, the present invention is not limited to this. The number of power supply ports 2611 and the number of ground ports 2613 may be different from each other as long as at least one of them is plural. Furthermore, the communication port 263 is not essential to the present invention.

[0026] 1, multiple ports with the same function included in the specific port 261 are connected to each other within the power supply unit 20. That is, the three power supply ports 2611 are connected to each other within the power supply unit 20, and the three ground ports 2613 are also connected to each other within the power supply unit 20. With this configuration, the same output voltage is applied to the three power supply ports 2611 from the power supply circuit 24. Furthermore, the same reference voltage (GND) is applied to the three ground ports 2613.

[0027] 1, the power supply circuit 24 is connected between the input unit 22 and the output unit 26. In this embodiment, the power supply circuit 24 is connected to the power terminal 221 of the input unit 22, the power port 2611 of the output unit 26, and the communication port 263 of the output unit 26 within the power supply unit 20. The power supply circuit 24 converts the input voltage input to the input unit 22 and supplies it to the output unit 26 as an output voltage.

[0028] In this embodiment, the power supply circuit 24 includes a voltage conversion and power supply circuit (not shown) that complies with the USB PD (Universal Serial Bus Power Delivery) standard. In this case, the power supply circuit 24 performs voltage conversion based on information from a user device (not shown) obtained via the connector unit 30, the first cable 40, and the communication port 263. In this embodiment, the communication port 263 is used for communication that complies with the USB PD standard. However, the present invention is not limited to this. The power supply circuit 24 does not have to comply with the USB PD standard. In that case, the communication port 263 may not be necessary. In either case, the power supply circuit 24 generates one predetermined voltage or selectively outputs one of multiple predetermined voltages. Note that the configuration of the power supply circuit 24 is not directly related to the present invention, so a detailed description thereof will be omitted.

[0029] As shown in FIG. 1 , the connector unit 30 includes an input unit 32 and a connector 34 for connecting a user device (not shown). The connector 34 is, for example, a connector that complies with the USB Type-C standard. In this embodiment, the connector 34 has at least a power terminal 341, a ground terminal 343, and a communication terminal 345. However, the present invention is not limited to this. The connector 34 does not have to comply with the USB Type-C standard. However, even in this case, the connector 34 needs to be compatible with the power supply circuit 24 of the power supply unit 20.

[0030] As can be seen from FIG. 1 , the input section 32 of the connector unit 30 has the same configuration as the output section 26 of the power supply unit 20. More specifically, the input section 32 is provided with three or more specific ports 321 and a communication port 323. The specific port 321 includes one or more power supply ports 3211 and one or more ground ports 3213. At least one of the power supply ports 3211 and the ground ports 3213 is plural. In this embodiment, the number of power supply ports 3211 and the number of ground ports 3213 are three. The power supply ports 3211 are connected to each other within the connector unit 30, and the ground ports 3213 are also connected to each other within the connector unit 30. The power supply ports 3211, the ground port 3213, and the communication port 323 are connected to the connector 34 within the connector unit 30. More specifically, the power supply port 3211, the ground port 3213, and the communication port 323 are connected to a power supply terminal 341, a ground terminal 343, and a communication terminal 345 of the connector 34, respectively.

[0031] 1, the first cable 40 has one power connection line (power supply port connection member) 42, one ground connection line (ground port connection member) 44, and one communication connection line (communication port connection member) 46. The electrical characteristics of the power connection line 42 and the electrical characteristics of the ground connection line 44 may be the same as or different from each other. Furthermore, the electrical characteristics of the communication connection line 46 may be the same as or different from the electrical characteristics of the power connection line 42 or the ground connection line 44.

[0032] 1 , the communication connection line 46 connects the communication port 263 of the output section 26 of the power supply unit 20 to the communication port 323 of the input section 32 of the connector unit 30. The power connection line 42 connects one of the power ports 2611 of the output section 26 of the power supply unit 20 to one of the power ports 3211 of the input section 32 of the connector unit 30. The ground connection line 44 connects one of the ground ports 2613 of the output section 26 of the power supply unit 20 to one of the ground ports 3213 of the input section 32 of the connector unit 30.

[0033] As can be seen from FIG. 1 , the output voltage generated by the power supply circuit 24 of the power supply unit 20 is supplied to the connector unit 30 via the first cable 40. At this time, a voltage drop occurs depending on the electrical resistance of the first cable 40. In other words, the voltage supplied to the connector unit 30 varies depending on the length of the first cable 40. In order to set the voltage supplied from the power supply unit 20 to the connector unit 30 to a predetermined value, in this embodiment, a voltage drop occurs depending on the distance between the power supply unit 20 and the connector unit 30. depending on , using the first cable 40, or using another cable as described below.

[0034] 2, a power supply system 10A has a second cable (connection member) 40A that is different from the first cable 40 of the power supply system 10 in Fig. 1. The power supply unit 20 and the connector unit 30 in the power supply system 10A are the same as the power supply unit 20 and the connector unit 30 in Fig. 1, respectively.

[0035] As shown in Fig. 2, the second cable 40A has two power connection lines (power port connection members) 42, one ground connection line (ground port connection member) 44, and one communication connection line (communication port connection member) 46. The power connection lines 42, the ground connection line 44, and the communication connection line 46 are the same as the power connection line 42, the ground connection line 44, and the communication connection line 46 in Fig. 1, respectively. In this embodiment, the two power connection lines 42 have the same electrical characteristics. However, the present invention is not limited to this. The power connection lines 42 may have different electrical characteristics.

[0036] 2, each of the power connection lines 42 connects one of the power ports 2611 of the power supply unit 20 to one of the power ports 3211 of the connector unit 30. 2611 are connected to each other, and the power supply ports 3211 of the connector unit 30 are also connected to each other. Therefore, the two power supply connection lines 42 form parallel lines connected in parallel to each other.

[0037] 1 and 2, the voltage drop per unit length of the second cable 40A in the power supply system 10A of FIG. 2 is smaller than the voltage drop per unit length of the first cable 40 in the power supply system 10 of FIG. 1. Therefore, even if the length of the second cable 40A is longer than the length of the first cable 40, the electrical resistance or voltage drop between the power supply port 2611 of the power supply unit 20 and the power supply port 3211 of the connector unit 30 in the power supply system 10A of FIG. 2 can be adjusted to be approximately the same as the electrical resistance or voltage drop of the power supply system 10. Therefore, the power supply system 10A can supply a predetermined voltage to the connector unit 30 using the second cable 40A.

[0038] Referring to FIG. 3, a power supply system 10B includes the first cable 40 and the second cable 41 of the power supply system 10 of FIG. Figure 21. The power supply system 10A has a third cable 40B that is different from the second cable 40A of the power supply system 10A. The power supply unit 20 and the connector unit 30 are the same as the power supply unit 20 and the connector unit 30 of FIG.

[0039] As shown in FIG. 3 , the third cable (connection member) 40B has three power connection lines (power port connection members) 42, one ground connection line (ground port connection member) 44, and one communication connection line (communication port connection member) 46. The power connection lines 42, the ground connection line 44, and the communication connection line 46 are the same as the power connection lines 42, the ground connection line 44, and the communication connection line 46 in FIG. 1 , respectively. In this embodiment, the three power connection lines 42 have the same electrical characteristics. However, the present invention is not limited to this. The power connection lines 42 may have different electrical characteristics from each other. Alternatively, two power connection lines 42 may have the same electrical characteristics and different electrical characteristics from the remaining power connection line 42.

[0040] 3, each of the power connection lines 42 connects one of the power ports 2611 of the power supply unit 20 to one of the power ports 3211 of the connector unit 30. 2611 are connected to each other, and the power supply ports 3211 of the connector unit 30 are also connected to each other. Therefore, the three power supply connection lines 42 form parallel lines connected to each other in parallel.

[0041] 2 and 3, the voltage drop per unit length of the third cable 40B in the power supply system 10B of FIG. 3 is smaller than the voltage drop per unit length of the second cable 40A in the power supply system 10A of FIG. 2. Therefore, even if the length of the third cable 40B is longer than the length of the second cable 40A, the electrical resistance or voltage drop between the power supply port 2611 of the power supply unit 20 and the power supply port 3211 of the connector unit 30 in the power supply system 10B of FIG. 3 can be adjusted to the same level as the electrical resistance or voltage drop in the power supply system 10A. Therefore, the power supply system 10B can supply a predetermined voltage to the connector unit 30 using the third cable 40B.

[0042] As can be understood from the above description, by selecting the number of power connection lines 42 (the number of connections) between the power port 2611 of the power feeding unit 20 and the power port 3211 of the connector unit 30, it is possible to adjust the electrical resistance or voltage drop between the power port 2611 of the power feeding unit 20 and the power port 3211 of the connector unit 30. In particular, by selecting the number of connections between the power port 2611 of the power feeding unit 20 and the power port 3211 of the connector unit 30 in accordance with the distance between the power feeding unit 20 and the connector unit 30, it is possible to adjust the electrical resistance between the power port 2611 of the power feeding unit 20 and the power port 3211 of the connector unit 30 to be approximately the same. In this way, the power feeding system 10, 10A, or 10B according to this embodiment can supply a predetermined voltage to the connector unit 30 regardless of the distance between the power feeding unit 20 and the connector unit 30.

[0043] One method for adjusting the electrical resistance or voltage drop between the power supply port 2611 of the power supply unit 20 and the power supply port 3211 of the connector unit 30 is to change the diameter of the power supply connection wire 42. However, although increasing the diameter of the power supply connection wire 42 reduces the electrical resistance, it may cause wiring problems such as reduced flexibility. Therefore, it is more effective to select the number of connections rather than changing the diameter of the power supply connection wire 42.

[0044] In the above embodiment, the electrical resistance or voltage drop between the power port 2611 of the power supply unit 20 and the power port 3211 of the connector unit 30 is adjusted by selecting the number of power connection lines 42. However, the present invention is not limited to this. For example, the number of power connection lines 42 may be one, and the number of ground connection lines 44 may be selected. In this case, the electrical resistance or voltage drop between the ground port 2613 of the power supply unit 20 and the ground port 3213 of the connector unit 30 is adjusted. Alternatively, both the number of power connection lines 42 and the number of ground connection lines 44 may be selected. In this case, the power connection lines 42 and the ground connection lines 44 have the same electrical characteristics, and the number of selected power connection lines 42 and the number of selected ground connection lines 44 are the same. In this way, the electrical resistance between the power supply unit 20 and the connector unit 30 can be adjusted by selecting the number of connections between the specific port 261 of the power supply unit 20 and the specific port 321 of the connector unit 30.

[0045] In the above embodiment, the ports 261 and 263 of the output section 26 of the power supply unit 20 and the ports 321 and 323 of the input section 32 of the connector unit 30 all have the same configuration. However, the present invention is not limited to this. The ports 261 and 263 may have different configurations, for example, different sizes. Ports with the same function may also have different sizes. For example, one or both of the power port 2611 and the ground port 2613 may be configured for thick, medium, and thin connection lines. In this case, thick, medium, and thin connection lines can be selectively combined as the power connection lines 42 or the ground connection lines 44. This increases the options for electrical resistance and voltage drop compared to when selecting the same number of power connection lines 42 or ground connection lines 44.

[0046] (Second embodiment) 4, a power supply system 10C according to the second embodiment of the present invention includes a power supply unit 20C and a connector unit 30C. The power supply system 10C also includes a fourth cable (connecting member) 40C that connects the power supply unit 20C and the connector unit 30C.

[0047] As shown in FIG. 4 , the output section 26C of the power supply unit 20C is different from the output section 26 of the power supply unit 20 of the first embodiment. Specifically, the output section 26C of the power supply unit 20C is provided with one each of a power port 2611, a ground port 2613, and a communication port 263. Except for this, the power supply unit 20C is configured similarly to the power supply unit 20 of the first embodiment. Furthermore, the input section 32C of the connector unit 30C is different from the input section 32 of the connector unit 30 of the first embodiment. Specifically, the input section 32C of the connector unit 30C is provided with one each of a power port 3211, a ground port 3213, and a communication port 323. Except for this, the connector unit 30C is configured similarly to the connector unit 30 of the first embodiment.

[0048] 4, the fourth cable 40C includes a power connection line (power port connection member) 42C that connects the power port 2611 of the power supply unit 20C and the power port 3211 of the connector unit 30C, and a ground connection line (ground port connection member) 44C that connects the ground port 2613 of the power supply unit 20C and the ground port 3213 of the connector unit 30C. In addition, the fourth cable 40C includes a communication connection line (communication port connection member) 46 that connects the communication port 263 of the power supply unit 20C and the communication port 323 of the connector unit 30C.

[0049] 4, the power connection line 42C of the fourth cable 40C has a pair of branching and merging sections, and two lines are connected in parallel between the branching and merging sections (intermediate section). By providing a double parallel line section in which two lines are connected in parallel in a portion of the power connection line 42C, the electrical resistance or voltage drop between the power supply port 2611 of the power supply unit 20C and the power supply port 3211 of the connector unit 30C can be reduced compared to when a single line is used for the connection. The same applies to the ground connection line 44C of the fourth cable 40C.

[0050] 5, the power supply system 10D includes a fifth cable 40D that is different from the fourth cable 40C of the power supply system 10C of FIG. 4. Specifically, the power connection line 42D of the fifth cable 40D has a pair of branching and merging sections, and three lines are connected in parallel between the branching and merging sections (an intermediate section). By providing a triple parallel line section in which three lines are connected in parallel in a section of the power connection line 42D, the electrical resistance or voltage drop between the power supply port 2611 of the power supply unit 20C and the power supply port 3211 of the connector unit 30C can be reduced compared to when a cable having a single line or a double parallel line section is used for the connection. The same applies to the ground connection line 44D of the fifth cable 40D.

[0051] 4 and 5 , even when the length of the fifth cable 40D is longer than the length of the fourth cable 40C, the electrical resistance or voltage drop in the fifth cable 40D can be adjusted to be approximately the same as the electrical resistance or voltage drop in the fourth cable 40C. This means that by selecting the number of lines connected in parallel in the intermediate section depending on the distance between the power supply unit 20C and the connector unit 30C, a predetermined voltage can be supplied to the connector unit 30C regardless of the distance between the power supply unit 20C and the connector unit 30C. In other words, similar to the first embodiment, in this embodiment as well, a predetermined voltage can be supplied to the connector unit 30C regardless of the distance between the power supply unit 20C and the connector unit 30C.

[0052] In the above-described embodiment, the number of parallel lines in the power supply connection line 42C or 42D is two or three. However, the present invention is not limited to this. In the present invention, the number of lines (parallel lines) in the intermediate section of the power supply connection line may be one or more. The same applies to the ground connection line.

[0053] In the above-described embodiment, the number of parallel lines in the power supply connection line 42C or 42D is the same as the number of parallel lines in the ground connection line 44C or 44D. However, the present invention is not limited to this. In the present invention, the number of parallel lines in the power supply connection line and the number of parallel lines in the ground connection line may be different.

[0054] As can be understood from the above description, in this embodiment, at least one of the power supply port connecting member and the ground port connecting member is selected from a plurality of types of connecting member candidates, each having a different number of parallel lines connecting the intermediate sections, according to the distance between the power supply unit 20C and the connector unit 30C. This makes it possible to supply a predetermined voltage to the connector unit 30C regardless of the distance between the power supply unit 20C and the connector unit 30C.

[0055] As described above, the present invention makes it possible to adjust the electrical resistance or voltage drop between the power supply unit 20 or 20C and the connector unit 30 or 30C by changing the number of parallel lines in at least a portion of the connection between the power supply port 2611 of the power supply unit 20 or 20C and the power supply port 3211 of the connector unit 30 or 30C, and between the ground port 2613 of the power supply unit 20 or 20C and the ground port 3213 of the connector unit 30 or 30C, depending on the length of the connection. This makes it possible to provide a predetermined voltage to the connector unit 30 or 30C regardless of the distance between the power supply unit 20 or 20C and the connector unit 30 or 30C.

[0056] Although the present invention has been described above using embodiments, the present invention is not limited to the above embodiments and various modifications and variations are possible without departing from the spirit of the present invention. For example, the power supply unit 20 and connector unit 30 of the first embodiment may be combined with the fourth cable 40C or the fifth cable 40D of the second embodiment. In this case, the number of power supply ports 2611, 3211, the number of ground ports 2613, 3213, and the number of parallel lines in the cables may be changed as desired. [Explanation of symbols]

[0057] 10, 10A, 10B, 10C, 10D Power Supply System 20,20C Power Supply Unit 22 Input section 221 Power terminal 223 Ground terminal 24 Power circuit 26,26C Output section 261 specific port 2611 Power Port 2613 Grandport 263 communication port 30,30C Connector Unit 32,32C Input section 321 specific port 3211 Power Port 3213 Grandport 323 communication port 34 Connector 341 Power terminal 343 Ground terminal 345 Communication terminal 40 First cable (connecting member) 40A Second Cable (Connecting Part) 40B Third cable (connecting member) 40C 4th cable (connecting member) 40D 5th cable (connecting member) 42, 42C, 42D Power connection wire (power port connection member) 44, 44C, 44D Ground connection wire (ground port connection member) 46 Communication connection line (communication port connection member)

Claims

1. A connection method for connecting a power supply unit having a power supply circuit to a connector unit having a connector for connecting a user device, comprising: The power supply unit and the connector unit are each provided with a power port and a ground port, In at least one of the connection between the power supply port of the power supply unit and the power supply port of the connector unit and the connection between the ground port of the power supply unit and the ground port of the connector unit, the number of parallel lines in at least a part of the section is changed according to the length of the connection so as to supply a predetermined voltage regardless of the distance between the power supply unit and the connector unit, thereby adjusting the voltage drop between the power supply unit and the connector unit. How to connect.

2. A power supply system comprising: a power supply unit having a power supply circuit; and a connector unit having a connector for connecting a user device, each of the power supply unit and the connector unit is provided with three or more specific ports, each of which is a power port and a ground port; the number of at least one of the power supply ports and the ground ports is plural, By selecting the number of connections between the specific port of the power supply unit and the specific port of the connector unit, the electrical resistance between the power supply unit and the connector unit can be adjusted so that a predetermined voltage is supplied regardless of the distance between the power supply unit and the connector unit. Power supply system.

3. The power supply system according to claim 2, In each of the power supply unit and the connector unit, a plurality of ports having the same function included in the specific port are connected to each other. Power supply system.

4. The power supply system according to claim 2 or 3, In each of the power supply unit and the connector unit, the number of the power ports is equal to the number of the ground ports and is two or more. Power supply system.

5. The power supply system according to any one of claims 2 to 4, the power supply unit includes a power supply circuit that complies with the USB (Universal Serial Bus) standard; The connector unit is provided with a connector that complies with the USB standard. Power supply system.

6. A power supply system comprising: a power supply unit having a power supply circuit; a connector unit having a connector for connecting a user device; and a connecting member for connecting the power supply unit and the connector unit, The power supply unit and the connector unit each have a power port and a ground port, the connection member includes a power port connection member that connects the power port of the power supply unit and the power port of the connector unit, and a ground port connection member that connects the ground port of the power supply unit and the ground port of the connector unit, At least one of the power supply port connecting member and the ground port connecting member is selected from a plurality of types of connecting member candidates having different numbers of lines connecting intermediate sections in accordance with the distance between the power supply unit and the connector unit so as to supply a predetermined voltage regardless of the distance between the power supply unit and the connector unit. Power supply system.

7. 1. A connector unit for a power supply system that connects a power supply unit having a power supply circuit and a connector unit having a connector for connecting user equipment via a cable, the connector unit comprising: The connector unit is provided with three or more specific ports each consisting of a power supply port and a ground port corresponding to the three or more specific ports each consisting of a power supply port and a ground port of the power supply unit, so that a predetermined voltage can be supplied regardless of the distance between the power supply unit and the connector unit. Connector unit.

8. 8. The connector unit according to claim 7, the connector is a connector conforming to the USB (Universal Serial Bus) standard, The connector unit further includes a communication port; the communication port of the connector unit is connected to the connector within the connector unit; The communication port of the connector unit is connected to a communication port provided in the power supply unit for performing communication conforming to the USB standard. Connector unit.

9. 1. A power supply unit for a power supply system, which connects a power supply unit having a power supply circuit and a connector unit having a connector for connecting user equipment via a cable, The power supply unit is provided with three or more specific ports each consisting of a power supply port and a ground port corresponding to the three or more specific ports each consisting of a power supply port and a ground port of the connector unit, so that a predetermined voltage can be supplied regardless of the distance between the power supply unit and the connector unit. Power supply unit.

10. 10. The power supply unit according to claim 9, the power supply circuit includes a power supply circuit that complies with the USB (Universal Serial Bus) standard; the power supply unit further includes a communication port; The communication port of the power supply unit is connected to a communication port provided in the connector unit for performing communication conforming to the USB standard. Power supply unit.

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