CN-121986420-A - Wiring device for supplying electric power

Abstract

The wiring device (2) for supplying power comprises a housing for housing a circuit and a receptacle connector, a control unit, and a moisture detection unit. The circuit has a voltage conversion circuit including a transformer, and a power output circuit for applying a voltage obtained by voltage conversion to a terminal side according to connection of a switch. The moisture detecting unit detects moisture existing in at least one of the inside of the guide unit and the outside portion of the guide unit in the housing. When the moisture detection signal is input from the moisture detection unit, the control unit controls the switch and the transformer so as to turn off the switch or maintain the voltage applied to the secondary side at a voltage of a preset minimum value in a state where the switch is connected.

Inventors

• GOTO SHUSAKU
• Qiu Zhengxiangzhi
• Ju Chiwu
• HARUKI SATOSHI
• YAMAMOTO TAKASHI

Assignees

• 松下知识产权经营株式会社

Dates

Publication Date

20260505

Application Date

20241021

Priority Date

20231030

Claims (5)

1. 1. A wiring device for supplying power is provided with: a housing accommodating the circuit and the receptacle connector; A control part, and A moisture detecting portion for detecting the moisture of the substrate, Wherein the receptacle connector has a bottomed tubular guide portion which opens upward, and a terminal which is disposed inside the guide portion for outputting electric power, The circuit has a voltage conversion circuit that converts a voltage on a primary side into a voltage on a secondary side through a transformer, and a power output circuit that applies the voltage subjected to the voltage conversion to the terminal side according to connection of a switch, The moisture detecting section detects moisture existing in at least one of the inside of the guide section and the outside portion of the guide section within the housing, When the plug connector is connected to the receptacle connector, the control unit connects the switch, and when the moisture detection signal is input by the moisture detection unit, the control unit controls the switch and the transformer so as to turn off the switch or maintain the voltage applied to the secondary side at a voltage of a preset minimum value in a state where the switch is connected.
2. 2. The wiring device for supplying electric power according to claim 1, wherein, The terminal has a pin for power transmission and at least two empty pins not used for power transmission, The moisture detecting unit detects the presence of moisture based on a change in resistance between the two dummy pins.
3. 3. The wiring device for supplying electric power according to claim 1, wherein, The control unit controls the switch and the transformer so as to turn off the switch and maintain the voltage on the secondary side at a predetermined voltage lower than the voltage at normal time when the moisture detection signal is input by the moisture detection unit.
4. 4. The wiring device for supplying electric power according to claim 1, wherein, Direct current power is supplied.
5. 5. The electrical power-supplying wiring harness according to claim 4, wherein, The wiring device is a USB socket device.

Description

Wiring device for supplying electric power Technical Field The present disclosure relates to a wiring device for supplying power, such as a wiring device having a USB (Universal Serial Bus: universal serial bus) terminal. Background Conventionally, a USB socket has been widely known as a wiring device for supplying dc power to electronic devices such as a smart phone, a tablet terminal, and a notebook computer. The wiring device for supplying power such as a USB socket includes a substrate on which electronic components are mounted, terminals for outputting power such as dc power, and a case surrounding the substrate and the terminals. The electronic component includes, for example, a power conversion component that converts ac power into dc power, and an output circuit component that outputs dc power from the terminal. In addition, it is also considered that the electronic component includes an output circuit component for outputting the ac power converted from the terminal output voltage. The electronic components are arranged in a plurality of substrates or in one substrate. Terminals for outputting power are connected to the upper side of the substrate on which the output circuit member is mounted. Further, a receptacle connector having a cylindrical guide portion and a terminal inside the guide portion is provided in the wiring device. The receptacle connector guides a plug connector for terminal connection, which is inserted from the outside, to the terminal through the guide portion. Patent documents 1 and 2 disclose that a cover is provided on the outside of the wiring device so as to cover an insertion port into which the plug connector is inserted. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2014-44914 Patent document 2 Japanese patent No. 6491231 Disclosure of Invention When the wiring device is installed on a ceiling of furniture, an insertion opening into which the plug connector can be inserted from the upper side may be formed in an upward opening in the upper portion of the wiring device so that the plug connector can be inserted into the wiring device from the upper side and connected to the terminal. The insertion port is formed by opening upward an insertion port provided at an upper portion of the housing and an upper end of a guide portion of the receptacle connector. However, in the wiring device in which the insertion port is formed to be opened upward, there is a possibility that the liquid entering the housing from the insertion port enters the position of the electronic component of the substrate in the housing due to the container in which the liquid containing moisture is placed being poured on the upper surface of the top plate or the like. Then, when the current is supplied in this state, there is a possibility that defects such as malfunction of the electronic component may occur. In addition, there is a case where the circuit disposed in the housing includes a transformer, the transformer converts the primary side voltage into the secondary side voltage, and the converted voltage is output from the power output circuit to the terminal of the receptacle connector. In this case, since the liquid is likely to intrude into the power output circuit disposed near the receptacle connector, there is a high possibility that the electronic components of the circuit will be defective when a high voltage is applied to the circuit. In addition, conventionally, in a case where a switch is provided in a power output circuit, and a voltage from a transformer side is output to a terminal according to connection of the switch, the control unit may control the connection of the switch only when a plug connector is connected to a receptacle connector. In this case, even if the liquid does not intrude into the power output circuit, when the liquid intrudes into the guide portion of the receptacle connector, it is easy to flow a current between the two contacts of the terminal, that is, the pins, through the liquid. Therefore, when the plug connector is connected, high current continues to flow to the power output circuit, and therefore, the high current causes heat generation in the electronic component. Accordingly, in a wiring device having a socket connector which is opened upward, it is desirable to prevent generation of a high voltage when moisture in the vicinity of a circuit disposed in the vicinity of the socket connector adheres, and to suppress heat generation of electronic components when the plug connector is connected. A wiring device for supplying electric power according to one embodiment of the present disclosure includes a housing that houses a circuit and a receptacle connector, a control unit that includes a bottomed tubular guide portion that opens upward, and a terminal that is disposed inside the guide portion and outputs electric power, the circuit including a voltage conversion circuit that converts a voltage on a prim