阅读说明：本技术 电感器、带基板的电感器及电连接箱 (Inductor, inductor with substrate and electric connection box ) 是由 土田敏之 山根茂树 爱知纯也 于 2019-01-25 设计创作，主要内容包括：电感器(30)具备：磁性体芯(31)；导电路(34),贯通磁性体芯(31)；台座部(40),具有保持磁性体芯(31)的芯保持部(41)和在载置于基板(21)时以能够相对于芯保持部(41)在基板(21)侧收纳电子元件(25)的高度进行支撑的支撑部(60A～60D)；及屏蔽部(63),相对于磁性体芯(31)而设于基板(21)侧,屏蔽因导电路(34)的通电而产生的磁场。(The inductor (30) is provided with: a magnetic core (31); a conductive path (34) that penetrates the magnetic core (31); a base unit (40) having a core holding unit (41) that holds the magnetic core (31), and support units (60A-60D) that support the core holding unit (41) at a height that allows the electronic component (25) to be housed on the substrate (21) side when the magnetic core is placed on the substrate (21); and a shield part (63) which is provided on the substrate (21) side with respect to the magnetic core (31) and shields the magnetic field generated by the conduction of the conductive path (34).)

1. An inductor is provided with:

a magnetic body core;

a conductive path penetrating the magnetic core;

a pedestal portion having a core holding portion for holding the magnetic core and a support portion for supporting the core holding portion at a height capable of accommodating an electronic component on the substrate side when the magnetic core is mounted on the substrate; and

and a shield portion provided on the substrate side with respect to the magnetic core and shielding a magnetic field generated by the conduction of the conductive path.

2. The inductor of claim 1,

the inductor includes a conductive cover portion covering a side of the magnetic core opposite to the substrate side.

3. The inductor according to claim 1 or 2,

the shield portion is provided on the entire surface of the base portion on the substrate side.

4. An inductor according to any one of claims 1 to 3, wherein

The inductor includes a terminal portion connected to the conductive path and connectable to an external terminal,

the base portion includes a terminal holding portion for holding the terminal portion.

5. An inductor with a substrate, comprising:

an inductor according to any one of claims 1 to 4;

a substrate on which the stage unit is mounted, the substrate having a ground pattern connected to a ground potential; and

the electronic component is mounted on the substrate and has a terminal connected to the ground pattern.

6. An electrical connection box is provided with a plurality of electrical connection boxes,

the inductor, the substrate, the electronic component, and the case for housing the inductor, the substrate, and the electronic component according to any one of claims 1 to 4.

Technical Field

In this specification, a technology related to an inductor, an inductor with a substrate, and an electrical junction box is disclosed.

Background

Conventionally, a technique for mounting an inductor element on a substrate is known. In patent document 1, a recess is formed in a first electronic component that is an inductor component mounted on a mounting substrate. The second electronic component is mounted on the mounting substrate at the recess of the first electronic component. Thus, the mounting area is reduced by the mounting area of the second electronic component, and the size of the mounting substrate is reduced to achieve miniaturization.

Disclosure of Invention

Problems to be solved by the invention

However, in the above configuration, although the second electronic component can be miniaturized by disposing the second electronic component in the recess portion of the inductor element, there is a possibility that the second electronic component is affected by a magnetic field generated from the inductor element.

The technology described in the present specification is based on the above-described circumstances, and an object thereof is to provide an inductor, an inductor with a substrate, and an electrical junction box, which can be downsized and can suppress an influence of a magnetic field generated by energization of a conductive path in the inductor on an electronic component mounted on the substrate.

Means for solving the problems

The inductor described in this specification includes: a magnetic body core; a conductive path penetrating the magnetic core; a base unit having a core holding unit for holding the magnetic core and a support unit for supporting the core holding unit at a height at which the electronic component can be accommodated on the substrate side when the magnetic core is mounted on the substrate; and a shield portion provided on the substrate side with respect to the magnetic core and shielding a magnetic field generated by the conduction of the conductive path.

According to this configuration, when the support portion of the inductor is placed on the substrate, the electronic component can be housed between the coil holding portion and the substrate, and therefore, the space on the substrate in which the electronic component can be housed is increased, the mounting density of the electronic component can be increased, and the size can be reduced. Here, when the inductor is mounted on the substrate in this way, the distance between the conductive path of the inductor and the electronic component on the substrate becomes short, and therefore there is a concern that the magnetic field from the conductive path to the electronic component may affect. According to this configuration, since the magnetic field generated on the electronic component side by the conduction of the conductive path is shielded by the shielding portion, the influence of the magnetic field generated by the conduction of the conductive path on the electronic component can be suppressed. This makes it possible to reduce the size and suppress the influence of a magnetic field generated by the conduction of the conductive path in the inductor on the electronic component mounted on the substrate.

As embodiments of the technology described in the present specification, the following embodiments are preferable.

The inductor includes a conductive cover portion covering a side of the magnetic core opposite to the substrate side.

In this way, the influence of the magnetic field generated on the opposite side of the magnetic core from the substrate side on the outside can be suppressed by the conductive cover portion.

The shield portion is provided on the entire surface of the base portion on the substrate side.

In this way, the influence on the electronic component mounted on the substrate can be suppressed in the entire conductive path in the inductor.

The inductor includes a terminal portion connected to the conductive path and connectable to an external terminal, and the base portion includes a terminal holding portion for holding the terminal portion.

Thus, the inductor functions as a terminal block, and can suppress the influence of a magnetic field generated by the conduction of current to the terminal block on the substrate side.

An inductor with a substrate is provided with: the above-mentioned inductor; a substrate on which the pedestal portion is mounted, the substrate having a ground pattern connected to a ground potential; and the electronic component mounted on the substrate and having a terminal connected to the ground pattern.

Although there is a concern about the influence on the electronic component connected to the ground pattern of the substrate due to the influence of the magnetic field from the inductor, according to the present configuration, the influence on the electronic component can be suppressed in the configuration in which the influence of the magnetic field is easily generated due to the connection to the ground pattern.

The electric connection box includes the inductor, the substrate, the electronic component, and a case for housing the inductor, the substrate, and the electronic component.

Effects of the invention

According to the technology described in the present specification, it is possible to reduce the size and suppress the influence of the magnetic field generated by the conduction path on the electronic component mounted on the substrate.

Drawings

Fig. 1 is a sectional view showing an electrical junction box of embodiment 1.

Fig. 2 is a longitudinal sectional view of the inductor with a substrate passing through the position of the recess of the pedestal portion.

Fig. 3 is a perspective view showing the pedestal portion on which the conductive path is formed.

Fig. 4 is a side view illustrating the mounting of the cover portion to the pedestal portion formed with the conductive path.

Fig. 5 is a perspective view illustrating the mounting of the shield portion to the pedestal portion formed with the conductive path.

Fig. 6 is a perspective view showing the hood.

Fig. 7 is a front view showing the hood.

Fig. 8 is a bottom view showing the hood.

Fig. 9 is a sectional view illustrating the mounting of the split member to the magnetic core of the pedestal portion.

Fig. 10 is a sectional view for explaining a step of attaching the partition member to the base portion.

Fig. 11 is a sectional view showing a state in which a magnetic core is attached to a base portion.

Fig. 12 is a sectional view showing the inductor with a substrate according to embodiment 2.

Detailed Description

Embodiment 1 will be described with reference to fig. 1 to 11.