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JP-7854612-B2 - Wiring devices that supply DC power

JP7854612B2JP 7854612 B2JP7854612 B2JP 7854612B2JP-7854612-B2

Inventors

  • 山本 純輝
  • 鈴木 智士
  • 菊池 悟

Assignees

  • パナソニックＩＰマネジメント株式会社

Dates

Publication Date
20260507
Application Date
20230329

Claims (15)

  1. A circuit board on which electronic components are mounted, A terminal mounted on the aforementioned circuit board, to which a connector provided on a cable can be connected from the outside of the wiring device, and a terminal that outputs DC power from the wiring device , A first housing located at the power output end of the aforementioned terminal, A second housing is provided on the opposite side from the aforementioned power output end, A wiring device for supplying DC power, comprising: an insulating member disposed between the first housing and the second housing, or between one or both of the terminal and the substrate and the inner wall surface of the first housing, the insulating member being made of a material with lower thermal conductivity than the second housing.
  2. The heat insulating member is positioned between the first housing and the second housing and constitutes a part of the housing that forms the outer surface. A wiring device for supplying DC power according to claim 1.
  3. The assembly direction of the first housing and the heat insulating member, and the assembly direction of the heat insulating member and the second housing are the same first assembly direction. The first housing has an opening formed in a position that overlaps with the terminal in the first assembly direction. A wiring device for supplying DC power according to claim 2.
  4. The aforementioned heat insulating member is a third housing, The first housing includes a front end wall portion provided at the front end which is the power output side end and having a connection port for connecting the connector to the terminal, and a peripheral wall portion extending from the peripheral wall portion of the front end wall portion to the rear side which is opposite to the power output side end, The third housing has a cylindrical portion and a third housing wall portion that extends toward the terminal from the inner wall surface of the cylindrical portion facing the terminal so as to face the front end wall portion , and is positioned between the first housing and the substrate . A wiring device for supplying DC power according to claim 2.
  5. The heat insulating member is positioned between the inner wall surface of the first housing and the terminal and the substrate, and is positioned adjacent to the inner wall surface of the first housing. A wiring device for supplying DC power according to claim 1.
  6. The aforementioned heat insulating member is in the form of a sheet. A wiring device for supplying DC power as described in claim 5.
  7. The heat insulating member is disposed between the inner wall surface of the first housing and the substrate, and is composed of a large number of air bubbles. A wiring device for supplying DC power according to claim 1.
  8. The heat insulating member is positioned in a compressed state between the inner wall surface of the first housing and the terminal, and is in contact with the inner wall surface of the first housing and the terminal. A wiring device for supplying DC power according to claim 1.
  9. The aforementioned heat insulating member is made of resin. A wiring device for supplying DC power according to claim 1 or claim 2.
  10. The first housing is made of resin, and the second housing is made of metal. A wiring device for supplying DC power according to claim 1.
  11. The second housing has a structure divided into multiple housings. A wiring device for supplying DC power according to claim 1.
  12. The emissivity of the thermal insulation member is lower than the emissivity of the inner wall of the first housing. A wiring device for supplying DC power according to claim 1.
  13. A heat shield is provided between the electronic component and the terminal. A wiring device for supplying DC power according to claim 1.
  14. The thermal insulation member is made of a material having a thermal conductivity lower than that of the material constituting the first housing. A wiring device for supplying DC power according to claim 1.
  15. It is a USB outlet device. A wiring device for supplying DC power according to claim 1.

Description

This disclosure relates to wiring devices for supplying DC power, and more particularly to wiring devices for supplying DC power that are equipped with a USB (Universal Serial Bus) terminal. Conventionally, USB outlets have been widely known as wiring devices for supplying DC power to electronic devices such as smartphones, tablet devices, and laptop computers. Wiring devices such as USB outlets comprise a circuit board on which electronic components are mounted, terminals for outputting DC power, and a housing enclosing the circuit board and terminals. The electronic components include power conversion components that convert AC power to DC power, and output circuit components for outputting DC power from the terminals. These electronic components are distributed across multiple circuit boards or arranged on a single circuit board. While electronic components such as power conversion components and terminals can generate heat during operation, this heat generation has not traditionally been a major problem. However, in recent years, DC power supply devices have become more powerful and smaller, significantly increasing the heat density, defined as power output per unit volume. With the increasing heat density of wiring devices supplying DC power, there is a strong need to improve thermal insulation to prevent heat generated from heat-generating components such as electronic components from being transferred to the power output side casing, which is accessible to users when installed on a wall or other surface. Patent Document 1 describes a main unit housing a circuit board with electronic components mounted on it, constructed by fixing two casings, a front and a rear, with the front casing, which has a power output end exposed from the wall, being made of resin. Japanese Patent Publication No. 2018-137444 This is a perspective view of an outlet using a wiring device that supplies DC power, which is the first embodiment.This is a perspective view showing the appearance of a wiring device that supplies DC power, which is the first embodiment.This is an exploded perspective view of a wiring device that supplies DC power, which is the first embodiment.This is a cross-sectional view in the front-to-back direction of a wiring device that supplies DC power, which is the first embodiment.This is a left-right cross-sectional view illustrating the thermal insulation structure in the power output side portion of a wiring device that supplies DC power, which is the first embodiment.This is a left-right cross-sectional view illustrating the engagement structure between the first housing and the heat insulating member in the first embodiment.This figure corresponds to Figure 5, which shows a wiring device that supplies DC power, representing a second embodiment.This is a schematic cross-sectional view in the left-right direction of a wiring device that supplies DC power, which is a third embodiment.This is a schematic cross-sectional view in the left-right direction of a wiring device that supplies DC power, which is the fourth embodiment.This is a schematic cross-sectional view in the left-right direction of a wiring device that supplies DC power, which is the fifth embodiment.This is a schematic cross-sectional view in the left-right direction of a wiring device that supplies DC power, which is the sixth embodiment. The following describes in detail an example of an embodiment of a wiring device for supplying DC power according to this disclosure, with reference to the drawings. Note that the configurations obtained by selectively combining the various embodiments and modified components described below are included within the scope of this disclosure. [First Embodiment] Referring to Figures 1 to 6, the wiring device 2 that supplies DC power, which is the first embodiment, will be described in detail. Figure 1 is a perspective view of the outlet 1 using the wiring device 2. As shown in Figure 1, the outlet 1 is a wiring device comprising two wiring devices 2 that supply DC power and one power outlet device 3, and is installed in the wall 100 of a building. The outlet 1 has a frame-shaped decorative plate 4 with an opening 4a, and the front surfaces 2a and 3a of the wiring devices 2 and power outlet device 3 are exposed through the opening 4a of the decorative plate 4. The decorative plate 4 is a rectangular frame-shaped plate in front view, covering the installation holes formed in the wall 100 and the mounting frames installed around the installation holes so that they are not visible. The outlet 1 includes, for example, a frame-shaped metal plate that is screwed to the mounting frame. The decorative plate 4 is fixed to the metal plate by, for example, hooking claws formed on its back surface into holes in the metal plate. The outlet 1 is installed in a mounting hole formed in the wall 100, with the wiring device 2 and power outlet device 3 inserted into it. On the front of the outlet 1, which is positioned along the