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US-12627085-B2 - Board module with heat dissipation portion and electrical junction box

US12627085B2US 12627085 B2US12627085 B2US 12627085B2US-12627085-B2

Abstract

An object is to improve heat dissipation performance while reducing a distance between boards when circuits on the boards are electrically connected to each other. The board module includes a first board including a first circuit, and a first connector provided on the first board, and the first connector is connected to a second connector, a through hole is formed in the first board, the first connector includes a connector housing disposed in the through hole and a first terminal, the first terminal includes a first board-side end portion connected to the first circuit, a first terminal portion held by the connector housing, and a heat dissipation portion provided between a first board-side end portion and the first terminal portion and exposed as seen from the opposite side to the second connector with respect to the connector housing.

Inventors

  • Shun Takamizawa

Assignees

  • AUTONETWORKS TECHNOLOGIES, LTD.
  • SUMITOMO WIRING SYSTEMS, LTD.
  • SUMITOMO ELECTRIC INDUSTRIES, LTD.

Dates

Publication Date
20260512
Application Date
20220629
Priority Date
20210705

Claims (8)

  1. 1 . A board module comprising: a first board including a first circuit; and a first connector provided on the first board, wherein the first connector is connected to a second connector, a through hole is formed in the first board, the first connector includes a connector housing disposed in the through hole and a first terminal, the first terminal includes: a first board-side end portion that is electrically and mechanically connected to the first circuit; a first terminal portion held by the connector housing, and a heat dissipation portion provided between the first board-side end portion and the first terminal portion and exposed from the connector housing as seen from a side opposite to the second connector, the board module further includes a receiving portion that is in contact with the heat dissipation portion from an opposite side to the first connector in a direction in which the first connector and the second connector are connected to each other, the first terminal includes a hanging portion that extends from a base end portion of the first terminal portion toward the receiving portion, a lateral extending portion that extends from an end portion of the hanging portion in a direction intersecting the hanging portion, and a stress absorption portion that is provided between the first board-side end portion and the lateral extending portion and can deform more easily than the first terminal portion, and the lateral extending portion is in contact with the receiving portion on an end portion side of the hanging portion such that a force that acts in a direction toward a base end of the first terminal portion is taken on by the receiving portion.
  2. 2 . The board module according to claim 1 , further comprising: a second connector provided on a second board including a second circuit provided spaced apart from the first board; wherein the second connector includes a second terminal including: a second board-side end portion that is electrically and mechanically connected to the second circuit; and a second terminal portion connected to the first terminal portion as a result of the first board and the second board approaching each other.
  3. 3 . The board module according to claim 2 , wherein the second board-side end portion is electrically and mechanically connected to the second circuit on the first board-side with respect to the second board.
  4. 4 . The board module according to claim 1 , wherein the heat dissipation portion protrudes on an opposite side to the second connector with respect to the connector housing.
  5. 5 . The board module according to claim 1 , wherein the heat dissipation portion is in contact with a heat dissipation promotion member in a heat conductive manner.
  6. 6 . The board module according to claim 1 ; wherein the first board-side end portion extends in a direction intersecting a direction in which the first connector and the second connector are connected to each other, and the first board-side end portion is electrically and mechanically connected to the first circuit on the second connector side with respect to the first board.
  7. 7 . The board module according to claim 1 , further comprising a peg member that is held by the connector housing and in contact with the first board from the second connector side.
  8. 8 . An electrical junction box comprising: the board module according to claim 1 ; and a case that covers the board module.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is the U.S. national stage of PCT/JP2022/025942 filed on Jun. 29, 2022, which claims priority of Japanese Patent Application No. JP 2021-111425 filed on Jul. 5, 2021, the contents of which are incorporated herein. TECHNICAL FIELD The present disclosure relates to a board module and an electrical junction box. BACKGROUND JP 2009-129858A discloses an inter-board connection structure that electrically connects circuits of a first board and a second board to each other and includes a first female terminal disposed on a surface of the first board that faces the opposite side to the second board, a second female terminal disposed on a surface of the second board that faces the opposite side to the first board, and a male member that has a first male terminal at one end and a second male terminal at the other end. The male member extends through the first board and the second board, and is connected to the first female terminal and the second female terminal. JP 2019-8872A discloses a connector that connects a board and an external terminal to each other, including a connector terminal portion connected to the board and the external terminal, and a housing portion that holds the connector terminal portion, in which the housing portion is installed on the board while extending through the board and protruding from two sides of the board in a height direction thereof. Here, when connecting a connector provided on a board to another connector, downsizing of a structure for connection and improvement in heat dissipation performance are required. No consideration is given to heat dissipation performance in Patent Documents 1 and 2. In view of this, an object of the present disclosure is to improve heat dissipation performance while downsizing a structure for connection when connecting a connector provided on a board to another connector. SUMMARY The board module according to the present disclosure is a board module including a first board including a first circuit, and a first connector provided on the first board, wherein the first connector is connected to a second connector, a through hole is formed in the first board, the first connector includes a connector housing disposed in the through hole and a first terminal, and the first terminal includes a first board-side end portion that is electrically and mechanically connected to the first circuit a first terminal portion held by the connector housing, and a heat dissipation portion provided between the first board-side end portion and the first terminal portion and exposed from the connector housing as seen from a side opposite to the second connector. Advantageous Effects According to the present disclosure, when connecting a connector provided on a board to another connector, heat dissipation performance can be improved while downsizing a structure for connection. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic perspective view showing an electrical junction box including a board module according to an embodiment. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1. FIG. 3 is a cross-sectional view showing a state where a connector is being connected. FIG. 4 is a perspective view showing a first connector. FIG. 5 is a perspective view showing a first terminal. FIG. 6 is a perspective view showing a peg member. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS First, embodiments of this disclosure will be listed and described below. A board module according to the present disclosure is as follows. In a first aspect, a board module including a first board including a first circuit, and a first connector provided on the first board, wherein the first connector is connected to a second connector, a through hole is formed in the first board, the first connector includes a connector housing disposed in the through hole and a first terminal, and the first terminal includes a first board-side end portion that is electrically and mechanically connected to the first circuit a first terminal portion held by the connector housing, and a heat dissipation portion provided between the first board-side end portion and the first terminal portion and exposed from the connector housing as seen from a side opposite to the second connector. According to this board module, the connector housing is disposed in the through hole formed in the first board, and the first terminal portion is held by the connector housing. As a result of the first connector and the second connector approaching each other, the first terminal portion and the second terminal portion of the second connector are connected to each other. Since the connector housing that holds the first terminal portion is disposed in the through hole, the structure for connection between the first connector and the second connector can be downsized. Also, since the first terminal is provided between the first board-side end portion and the first terminal portion