JP-2026075289-A - Circuit board connection structure

Abstract

[Problem] To secure mounting area on the circuit board by consolidating the fastening points into one. [Solution] The circuit board connection structure 10 of the present disclosure comprises a double-sided circuit board 20 having a front surface 21 and a back surface 22, a main busbar 30, a first electrical component 40A and a second electrical component 40B mounted on the double-sided circuit board 20, a first branch busbar 50A connected to the main busbar 30, a second branch busbar 50B connected to the main busbar 30, and one fastening member 60. The double-sided circuit board 20 has a first conductor 23 connecting the first electrical component 40A and the first branch busbar 50A, and a second conductor 24 connecting the second electrical component 40B and the second branch busbar 50B. The one fastening member 60 fastens the first branch busbar 50A and the first conductor 23 on the front surface 21, and simultaneously fastens the second branch busbar 50B and the second conductor 24 on the back surface 22. [Selection Diagram] Figure 3

Inventors

• 岡本 昂大
• 木佛寺 宣博
• 柳田 泰次
• 石川 令季
• 森野 慎太郎

Assignees

• 株式会社オートネットワーク技術研究所
• 住友電装株式会社
• 住友電気工業株式会社

Dates

Publication Date

20260508

Application Date

20241022

Claims (4)

1. A double-sided circuit board having a front surface and a back surface, Main bus bar and, The first electrical component and the second electrical component mounted on the double-sided circuit board, A first branch busbar connected to the main busbar, A second branch busbar connected to the aforementioned main busbar, It comprises one fastening member, The double-sided circuit board has a first conductor connecting the first electrical component and the first branch busbar, and a second conductor connecting the second electrical component and the second branch busbar. A connection structure for a circuit board in which the one fastening member fastens the first branch busbar and the first conductor on the front surface and fastens the second branch busbar and the second conductor on the back surface.
2. A first insulating member that insulates the first branch busbar and the fastening member, The circuit board connection structure according to claim 1, further comprising a second insulating member that insulates the space between the second branch busbar and the fastening member.
3. The aforementioned main busbar comprises a first main busbar and a second main busbar. The circuit board connection structure according to claim 1 or claim 2, wherein the first electrical component and the second electrical component are connected in parallel between the first main busbar and the second main busbar.
4. The aforementioned main busbar comprises a first main busbar and a second main busbar. The first electrical component and the second electrical component are connected in series between the first main busbar and the second main busbar. The circuit board connection structure according to claim 1 or claim 2, wherein a ground circuit is connected to the connection point connecting the first electrical component and the second electrical component.

Description

This disclosure relates to a connection structure for a circuit board. Conventionally, an electronic control device described in Japanese Patent Publication No. 2022-144169 (see Patent Document 1 below) is known. This electronic control device comprises a substrate on which noise generating elements are mounted, a housing to which the substrate is fixed, and three fastening members for fixing the substrate to the housing. Japanese Patent Publication No. 2022-144169 Figure 1 is a perspective view of the connection structure of the circuit board of Embodiment 1.Figure 2 is a plan view of the connection structure of the circuit board of Embodiment 1.Figure 3 is a cross-sectional view taken along line A-A in Figure 2.Figure 4 is a circuit diagram of Embodiment 1.Figure 5 is a plan view of the connection structure of the circuit board of Embodiment 2.Figure 6 is a circuit diagram of Embodiment 2. [Description of Embodiments in this Disclosure] [1] The circuit board connection structure of the present disclosure comprises a double-sided circuit board having a front surface and a back surface, a main busbar, a first electrical component and a second electrical component mounted on the double-sided circuit board, a first branch busbar connected to the main busbar, a second branch busbar connected to the main busbar, and a fastening member, wherein the double-sided circuit board has a first conductor connecting the first electrical component and the first branch busbar, and a second conductor connecting the second electrical component and the second branch busbar, and the fastening member fastens the first branch busbar and the first conductor on the front surface and fastens the second branch busbar and the second conductor on the back surface. Since the first branch busbar and the first conductor are fastened together on the front surface of the double-sided circuit board by fastening members, and the second branch busbar and the second conductor are fastened together on the back surface of the double-sided circuit board by the same fastening members, the fastening points can be consolidated into a single point, thereby securing the mounting area of the double-sided circuit board. [2] In the above [1], it is preferable to further include a first insulating member that insulates the first branch busbar from the fastening member, and a second insulating member that insulates the second branch busbar from the fastening member. When fastening with a single fastening member, it is necessary to ensure insulation between the first branch busbar and the second branch busbar. In this regard, the above configuration ensures that the first branch busbar and the fastening member are insulated by the first insulating member, and the second branch busbar and the fastening member are insulated by the second insulating member, thus avoiding connection between the first and second branch busbars via the fastening member. [3] In the above [1] or [2], the main busbar preferably comprises a first main busbar and a second main busbar, and the first electrical component and the second electrical component are preferably connected in parallel between the first main busbar and the second main busbar. The fastening points for connecting the first and second electrical components to the first main busbar can be consolidated into a single point, and the fastening points for connecting the first and second electrical components to the second main busbar can also be consolidated into a single point. [4] In the above [1] or [2], the main busbar comprises a first main busbar and a second main busbar, the first electrical component and the second electrical component are connected in series between the first main busbar and the second main busbar, and preferably a ground circuit is connected to the connection point between the first electrical component and the second electrical component. The fastening points for connecting the first electrical component to the first main busbar and the second electrical component to the second main busbar can be consolidated into a single point, and the fastening points for connecting the first electrical component to the ground circuit and the second electrical component to the ground circuit can also be consolidated into a single point. [Details of the embodiments of this disclosure] Embodiments of the present disclosure are described below. This disclosure is not limited to these examples, but is indicated by the claims, and all modifications within the meaning and scope of the claims are intended to be included. In the drawings, some parts of the configuration may be exaggerated or simplified for illustrative purposes. Also, the dimensional ratios of the parts may differ in the drawings. In this specification, “orthogonal” includes not only strictly orthogonal but also approximately orthogonal to the extent that the function and effect of the present embodiment is achieved. Furthermore, in this specificati