WO2023127079A1

WO2023127079A1 - Electronic control device

Info

Publication number: WO2023127079A1
Application number: PCT/JP2021/048755
Authority: WO
Inventors: 祐輝中村; 俊明高井
Original assignee: 日立Astemo株式会社
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2023-07-06

Abstract

This electronic control device comprises: a circuit board to which an integrated circuit and a peripheral circuit of the integrated circuit are mounted; a housing that is partially or entirely configured from a non-metal material, and accommodates the circuit board in the interior thereof; and an installation fixture for installing the housing in a vehicle. The installation fixture is configured from a first support part, a second support part, and a third support part connecting one end of the first support part and one end of the second support part, and a gap is provided between the other end of the first support part and the other end of the second support part.

Description

electronic controller

The present invention relates to an electronic control device.

In recent years, the development of ECUs (Electric Control Units) for AD (Automated Driving) and ADAS (Advanced Driving Assist System) has become active. In the 2020s, vehicles with functions equivalent to Autonomous Driving Level 2 defined by the Automobile Bureau of the Ministry of Land, Infrastructure, Transport and Tourism are expected to drive the market. The installation of ADAS-ECU that realizes 2 is progressing. For this reason, there is an increasing demand for ADAS-ECUs not only to achieve both high functionality and reliability of products, but also to reduce costs.

One way to meet both of these demands is to use resin for the ECU housing. Specifically, conventionally, metal materials mainly composed of any one of aluminum, stainless steel and iron have been widely used for housing materials of AD/ADAS-ECUs. It is intended to replace with synthetic resin materials such as. Compared with other materials, resin materials generally have the advantages of low cost, light weight, and easy molding. In addition, resin materials have also been developed that satisfy the mechanical strength and thermal resistance required for in-vehicle electronic devices.

On the other hand, one of the issues when replacing the housing material from metal material to resin material is the decrease in EMC (Electro Magnetic Compatibility) performance. In-vehicle electronic devices are required to satisfy reliability standards established independently by automobile manufacturers and suppliers based on international standards such as ISO, IEC, and CISPR. Among these standards, there are standards related to electromagnetic noise leakage from the device and resistance to external electromagnetic noise, that is, EMC performance. The purpose of this standard is to suppress mutual electromagnetic interference with electronic equipment in and around the vehicle.

Metal materials have the property of reflecting electromagnetic noise on their surfaces. For this reason, a metallic housing can inevitably obtain a function as an electromagnetic shield. On the other hand, the resin material has a characteristic of transmitting electromagnetic waves. Therefore, the circuit board built in the resin housing is exposed to external electromagnetic noise or emits electromagnetic noise without an electromagnetic shield. Therefore, if the housing material is replaced from a metal material to a resin material, it becomes difficult to comply with the EMC standard.

Among the EMC standards, there is a test that applies static electricity to the ECU body and its surroundings. This is a test that simulates the case where static electricity is unintentionally applied by a worker during the manufacture of an ECU or installation in a vehicle. When a voltage of several kV to several tens of kV is applied, the circuit is driven at several volts. It is a very strict test that must guarantee the operation of As a countermeasure against static electricity noise, it is possible to reduce static electricity noise that conducts to important locations on circuit boards such as integrated circuits by applying static protection elements and protection circuits as disclosed in Patent Document 1. is. As a result, it is possible to prevent circuit malfunction and element destruction due to static electricity noise.

JP 2019-205119 A

　Electrostatic noise (electric field) propagates in space from the static electricity application point along the conductor. Part of this noise reaches the circuit board and induces a voltage in the wiring pattern on the circuit board, resulting in conduction noise. According to Patent Document 1, by mounting an electrostatic protection element or a protection circuit on a circuit board, conduction noise can be prevented from reaching a circuit to be protected. However, it is difficult to protect all the wiring patterns on the circuit board due to restrictions on cost and component mounting area. In addition, since part of the electrostatic noise is directly coupled to components on the circuit board, there is also a component that does not become conduction noise. It is difficult to reduce this noise component even by taking countermeasures using the electrostatic protection element and the protection circuit described in Patent Document 1.

An object of the present invention is to provide an electronic control device that reduces the influence of static electricity noise propagating along conductors on circuits and that has improved static noise immunity.

In order to solve the above problems, for example, the configurations described in the claims are adopted.
The present application includes a plurality of means for solving the above problems. One of them is a circuit board on which an integrated circuit and peripheral circuits of the integrated circuit are mounted, and a part or all of which is composed of a non-metallic material. , an electronic control device comprising: a housing for housing a circuit board therein; A third support portion connecting one end of the first support portion and one end of the second support portion, and a gap is provided between the other end of the first support portion and the other end of the second support portion. is provided.

According to the present invention, it is possible to provide an electronic control device with improved electrostatic noise resistance at low cost when a non-metallic material is used for the housing. Problems, configurations, and effects other than these will be clarified by the following description of the embodiments.

1 is a perspective view showing the configuration of an electronic control unit according to a first embodiment; FIG. FIG. 2 is a perspective view showing the configuration of a fixture included in the electronic control device according to the first embodiment; FIG. 4 is a plan view showing the positional relationship between the circuit board and the fixture in the electronic control device according to the first embodiment; FIG. 2 is a plan view showing a state in which an integrated circuit and peripheral circuits are arranged outside the overlapping region between the circuit board and the fixture in the electronic control device according to the first embodiment; FIG. 11 is a perspective view showing the configuration of a fixture included in the electronic control device according to the second embodiment; FIG. 11 is a perspective view showing the configuration of a fixture included in an electronic control device according to a third embodiment; It is a perspective view which shows the structure of the electronic control unit which concerns on 4th Embodiment. FIG. 11 is a perspective view showing the configuration of a fixture included in an electronic control device according to a fifth embodiment; FIG. 11 is a perspective view illustrating the configuration of a fixture included in an electronic control device according to a sixth embodiment; FIG. 11 is a perspective view illustrating the configuration of an electronic control device according to a seventh embodiment;

Embodiments of the present invention will be described below with reference to the drawings. The following description and drawings are examples for explaining the present invention, and are appropriately omitted and simplified for clarity of explanation. The present invention can also be implemented in various other forms. Unless otherwise specified, each component may be singular or plural. In addition, the position, size, shape, range, etc. of each component shown in the drawings may not represent the actual position, size, shape, range, etc., in order to facilitate understanding of the invention. As such, the present invention is not necessarily limited to the locations, sizes, shapes, extents, etc., disclosed in the drawings. Further, in the present specification and drawings, functionally or structurally corresponding constituent elements are denoted by the same reference numerals, and overlapping descriptions are omitted.

(First embodiment)
FIG. 1 is a perspective view showing the configuration of an electronic control unit 200 according to the first embodiment.
As shown in FIG. 1, the electronic control device 200 includes a housing 4, a circuit board 6, and a fixture 100. As shown in FIG. The electronic control device 200 is suitable for application to a so-called on-vehicle electronic control device mounted in a vehicle such as an automobile.

The housing 4 is made of a non-metallic material. Examples of the non-metallic material forming the housing 4 include resins such as PBT (polybutylene terephthalate), conductive resins containing metal fillers, and the like. The housing 4 is configured by a hollow hexahedron (rectangular parallelepiped). An opening 5 is formed in one side surface of the housing 4 .

The circuit board 6 is housed inside the housing 4 . The circuit board 6 is fixed to the housing 4 by screwing, for example. However, the structure for fixing the circuit board 6 to the housing 4 is not limited to screws. A structure for fixing the substrate 6 may be employed. The circuit board 6 is composed of a printed wiring board on which a wiring pattern (not shown) is formed. The printed wiring board constituting the circuit board 6 may be a single-sided printed wiring board or a double-sided printed wiring board. The circuit board 6 is formed in a quadrangular shape (rectangular shape in the figure) in plan view.

An integrated circuit 7, a peripheral circuit 8 of the integrated circuit 7, and an external interface connector 9 are mounted on the circuit board 6. Although FIG. 1 shows an example in which one integrated circuit 7 and one peripheral circuit 8 are mounted on the circuit board 6, a plurality of integrated circuits 7 and peripheral circuits 8 may be mounted. The integrated circuit 7 is composed of a semiconductor package having a semiconductor chip that functions as a microcomputer. Examples of the form of the semiconductor package forming the integrated circuit 7 include BGA (Ball Grid Array) and QFP (Quad Flat Package). The microcomputer of the integrated circuit 7 processes signals received from, for example, an imaging sensor such as a camera mounted on the vehicle, determines the next operation of the vehicle, and transmits control signals based on the determination to the drive unit of the vehicle. play a role.

The peripheral circuit 8 is arranged around the integrated circuit 7 . A peripheral circuit 8 is a circuit necessary for operating the integrated circuit 7 . Examples of the peripheral circuit 8 include a circuit for supplying power to the integrated circuit 7 and a circuit such as a filter for reducing noise. The peripheral circuit 8 is arranged on the side of the external interface connector 9 when viewed from the integrated circuit 7 . That is, the peripheral circuit 8 is arranged between the integrated circuit 7 and the external interface connector 9 .

The external interface connector 9 is a connector for electrically connecting the circuit board 6 and an external device (not shown). The external interface connector 9 is mounted on one side of the circuit board 6 . A part of the external interface connector 9 is arranged to protrude outside one side of the circuit board 6 , and the protruding connector part is arranged to face the opening 5 of the housing 4 .

The attachment 100 is a member for attaching the electronic control device 200 to a vehicle (not shown). The electronic control unit 200 is fixed to the vehicle by the mounting fixture 100 . The fixture 100 is made of a metal material. As the metal material that constitutes the fixture 100, a metal material containing any one of aluminum, stainless steel, and iron as a main component can be used. The fixture 100 is attached to the housing 4 by screwing or the like.

FIG. 2 is a perspective view showing the configuration of the mounting fixture 100 included in the electronic control device according to the first embodiment.
As shown in FIG. 2, the fixture 100 is formed in the shape of a flat plate as a whole. The fixture 100 is composed of a first support portion 1 , a second support portion 2 and a third support portion 3 . The first support part 1 and the second support part 2 are parts that directly support the housing 4, and the third support part 3 is a part that supports the first support part 1 and the second support part 2 together. It is a portion that indirectly supports the housing 4 via the . The third support portion 3 also serves as a connection portion for connecting the attachment 100 to the vehicle.

The first support part 1 and the second support part 2 are each formed in an L shape in plan view so as to bypass the space 21 . The third support portion 3 is formed in a rectangular shape in plan view. Further, the third support portion 3 is formed so as to connect one end 1a of the first support portion 1 and one end 2a of the second support portion 2 . On the other hand, the other end 1b of the first support portion 1 is bent toward the other end 2b of the second support portion 2, and the other end 2b of the second support portion 2 It is curved toward the other end 1b. A gap D1 is provided between the other end 1b of the first support portion 1 and the other end 2b of the second support portion 2. As shown in FIG. The interval D1 is set to such a dimension that electrostatic noise does not propagate between the other end 1b of the first support portion 1 and the other end 2b of the second support portion 2. As shown in FIG.

The attachment 100 configured as described above is attached to the lower surface of the housing 4 . When the fixture 100 is attached to the housing 4, the first support section 1 and the second support section 2 are arranged in contact with or close to the lower surface of the housing 4, respectively, and the third support section 3 are arranged so as to protrude from the housing 4 . Of the two opposing sides of the housing 4, the first support 1 supports one side of the housing 4, and the second support 2 supports the other side of the housing 4. there is Thereby, the housing 4 can be stably supported. The direction in which the third support portion 3 protrudes from the housing 4 and the direction in which the external interface connector 9 protrudes from the circuit board 6 are different from each other.

FIG. 3 is a plan view showing the positional relationship between the circuit board 6 and the fixture 100 in the electronic control device 200 according to the first embodiment. In addition, in FIG. 3, elements unnecessary for explanation are omitted.
When the electronic control device 200 shown in FIG. 1 is viewed from above, the circuit board 6 and the fixture 100 are arranged in a positional relationship as shown in FIG. Specifically, the circuit board 6 and the fixture 100 are arranged to overlap each other in the overlap region 22 . The overlapping area 22 is the hatched area in FIG. The integrated circuit 7 and the peripheral circuit 8 are arranged in an inner region 23, assuming that the region inside the overlapping region 22 is an inner region 23. As shown in FIG. That is, the integrated circuit 7 and the peripheral circuit 8 are arranged outside the overlap region 22 .

Next, a mechanism for reducing static electricity noise in the electronic control unit 200 according to the first embodiment will be described. Here, it is assumed that the static electricity application point exists at the third support portion 3 of the fixture 100 .

The electrostatic noise, that is, the electric field propagates along the metal from the point of application while having a vector component perpendicular to the surface of the fixture 100 . Electric fields cannot exist in metals, as required by classical electromagnetism. Therefore, the electric field has an intensity distribution in the surrounding space while propagating along the metal. Electrostatic noise propagated along the fixture 100 first reaches the circuit board 6 and then reaches the peripheral circuit 8 and the integrated circuit 7 . Ultimately, the electrostatic noise has an intensity distribution such that the mounting fixture 100 and the entire circuit board 6 are exposed to the electrostatic noise. The technique described in Patent Literature 1 is highly effective in reducing noise components induced in the peripheral circuit 8, but it is difficult to reduce static electricity noise that reaches the integrated circuit 7 directly without going through the peripheral circuit 8. can't.

On the other hand, in the electronic control device 200 according to the first embodiment, as shown in FIGS. Arranged so as to avoid the inner region 23 (especially the integrated circuit 7 and the peripheral circuit 8 which are susceptible to noise), and between the ends (1b, 2b) of the first support portion 1 and the second support portion 2 is provided with an interval D1. With such a shape of the fixture 100, static electricity noise propagates along the first support portion 1 and the second support portion 2, so that the static electricity noise existing in the space 21 (see FIG. 2) between them is can be reduced. Therefore, by arranging the integrated circuit 7 and the peripheral circuit 8, which are noise-receiving parts, at positions overlapping the space 21 on the circuit board 6, the electrostatic noise reaching the integrated circuit 7 and the peripheral circuit 8 can be reduced. can be done. Therefore, the influence of electrostatic noise propagating along the mounting fixture 100, which is a conductor, on the circuits (particularly the integrated circuit 7 and the peripheral circuit 8) can be reduced, and the electrostatic noise resistance of the electronic control device 200 can be enhanced.

Also, in the actual circuit board 6, depending on the size of the circuit board 6, the entire circuit board 6 may be exposed to static electricity noise. Also, there are cases where it is unclear which part on the circuit board 6 is affected by the static electricity noise. In such a case, it is desirable to secure as large a space 21 as possible for reducing static electricity noise. Also, in order to reduce layout restrictions of the integrated circuit 7 and the peripheral circuit 8 on the circuit board 6, as shown in FIG. It is desirable that the area is smaller than the area of the inner region 23 , which is the inner region of the overlapping region 22 .

In addition, since static electricity noise propagates along metal, the closer the integrated circuit 7 or peripheral circuit 8, which is a noise-receiving part, is to the metal, the more intense the static electricity noise is exposed to. Therefore, for example, when a noise-receiving portion is arranged in the overlapping region 22, the noise-receiving portion has the same strength as when there is no space 21 between the first support portion 1 and the second support portion 2. exposed to static electricity noise. For this reason, in order to obtain the effect of reducing static electricity noise, it is necessary to arrange the noise-receiving portion at a position avoiding the overlap region 22 . In the electronic control device 200 according to the first embodiment, the integrated circuit 7 and the peripheral circuit 8, which are noise-affected portions, are arranged outside the overlap region 22 between the mounting fixture 100 and the circuit board 6, as shown in FIG. ing. Therefore, compared to the case where the integrated circuit 7 and the peripheral circuit 8 are arranged in the overlap region 22, the influence of the electrostatic noise propagating along the fixture 100 on the integrated circuit and the peripheral circuit 8 can be reduced.

Although FIG. 4 shows an example in which all of the integrated circuit 7 and the peripheral circuit 8 are arranged outside the overlap region 22, the present invention is not limited to this, and at least part of the integrated circuit 7 and the peripheral circuit 8 It may be arranged outside the overlap region 22 .

In addition, in FIG. 4, the mounting fixture 100 and the circuit board 6 are arranged so as to partially overlap each other. good too. Specifically, the circuit board 6 may be arranged so as to be accommodated within the space 21 formed between the first support portion 1 and the second support portion 2 . However, in order to reduce the size of the electronic control unit 200, it is preferable to partially overlap the mounting fixture 100 and the circuit board 6. FIG.

(Second embodiment)
FIG. 5 is a perspective view showing the configuration of a mounting fixture 100 included in the electronic control device according to the second embodiment.
The fixture 100 shown in FIG. 5 differs from the configuration of the first embodiment (FIG. 2) in the shapes of the first support part 1 and the second support part 2 . Specifically, the first support portion 1 is formed linearly from one end 1a to the other end 1b, and the second support portion 2 is also formed linearly from one end 2a to the other end 2b. Therefore, the distance D2 between the other end 1b of the first support portion 1 and the other end 2b of the second support portion 2 is ensured to be larger than the distance D1 shown in FIG.

When the fixture 100 having such a shape is adopted, the electrostatic noise propagation area in the fixture 100 is narrower than in the first embodiment. Therefore, the noise reduction area can be provided on the circuit board 6 in a wider range.

(Third Embodiment)
FIG. 6 is a perspective view showing the configuration of a mounting fixture 100 included in the electronic control device according to the third embodiment.
The fixture 100 shown in FIG. 6 differs from the configuration of the second embodiment (FIG. 5) in the shape of the third support portion 3 .
When connecting the fixture 100 to a vehicle, the third support part 3 can be formed in various shapes according to the shape of the insertion port provided on the vehicle side. The shape of the third support part 3 shown in FIG. 6 is an example of a shape applied to the third support part 3 for connecting the attachment 100 to the vehicle.

As shown in FIG. 6, the third support portion 3 is provided with a fitting portion 25 which is substantially V-shaped when viewed from the A direction. The fitting portion 25 is a portion for positioning and connecting the attachment 100 to a vehicle (not shown). For this reason, the fitting portion 25 is formed in accordance with the shape of an insertion port (not shown) on the vehicle side. When connecting the fixture 100 to the vehicle, the third support portion 3 having the fitting portion 25 is inserted into the insertion port on the vehicle side. As a result, the fixture 100 is positioned in the direction orthogonal to the insertion direction of the third support portion 3 . Therefore, for example, at least one of the attachment 100 and the vehicle is provided with a retaining stopper (not shown), and when the third supporting portion 3 is inserted into the insertion port on the vehicle side, the third supporting portion is provided by the retaining stopper portion. By preventing the portion 3 from coming off, the mounting of the electronic control unit 200 to the vehicle can be completed simply by inserting the third support portion 3 having the fitting portion 25 into the insertion port on the vehicle side.

Note that the shape of the fitting portion 25 when viewed from direction A in FIG. 6 is not limited to a substantially V shape, and may be any shape such as a substantially U shape as long as it is a shape that allows positioning of the fixture 100 with respect to the vehicle. may be

(Fourth embodiment)
FIG. 7 is a perspective view showing the configuration of an electronic control unit 200 according to the fourth embodiment.
In the electronic control unit 200 shown in FIG. 7, the configuration of the fixture 100 is the same as the configuration of the second embodiment (FIG. 5). A first insertion portion 31 and a second insertion portion 32 are provided on the lower surface of the housing 4 . The first insertion portion 31 and the second insertion portion 32 may be integrated with the housing 4 by resin injection molding or the like, or may be formed separately from the housing 4 . When the first insertion portion 31 and the second insertion portion 32 are configured separately from the housing 4, the first insertion portion 31 and the second insertion portion 32 are attached to the housing 4 by, for example, screwing, bonding, or the like. should be fixed to the bottom of the

The first insertion portion 31 and the second insertion portion 32 are arranged parallel to each other. The first insertion portion 31 is an elongated hollow portion along one side of the housing 4, and the second insertion portion 32 is an elongated hollow portion along the other side of the housing 4. It has become. The first insertion portion 31 has a first insertion port 31a, and the second insertion portion 32 has a second insertion port 32a.

When attaching the attachment 100 to the housing 4 having the first insertion portion 31 and the second insertion portion 32, the first support portion 1 is inserted into the first insertion portion 31 through the first insertion port 31a. , and the second support portion 2 is inserted into the second insertion portion 32 through the second insertion port 32a. In this state, the first support portion 1 and the second support portion 2 are fixed to the housing 4 by fixing means such as screws or adhesion. However, the method of fixing the fixture 100 to the housing 4 is not limited to a specific method.

In the fourth embodiment, the first support part 1 and the second support part 2 are fixed to the housing 4 by inserting them into the corresponding first insertion parts 31 and second insertion parts 32 respectively. Thus, the fixture 100 can be attached to the housing 4 . Therefore, the attachment 100 can be mounted on the electronic control unit 200 with a small number of man-hours.

(Fifth embodiment)
FIG. 8 is a perspective view showing the configuration of a fixture 100 included in the electronic control device according to the fifth embodiment.
The fixture 100 shown in FIG. 8 differs from the configuration of the second embodiment (FIG. 5) in the shapes of the first support section 1 and the second support section 2 . Specifically, the first support portion 1 is formed in a tapered shape in which the width gradually narrows from one end 1a of the first support portion 1 toward the other end 1b. Similarly, the second support portion 2 is formed in a tapered shape in which the width gradually narrows from one end 2a of the second support portion 2 toward the other end 2b. However, the dimension from the outer edge 1c of the first support portion 1 to the outer edge 2c of the second support portion 2, that is, the overall width W of the attachment 100 is the same as the overall width of the attachment 100 shown in FIG. The outer edge 1c of the first support portion 1 and the outer edge 2c of the second support portion 2 are arranged parallel to each other. On the other hand, the inner side 1d of the first support portion 1 and the inner side 2d of the second support portion 2 are inclined in different directions. A portion 2 is formed in a tapered shape. Moreover, the space D3 between the other end 1b of the first support portion 1 and the other end 2b of the second support portion 2 is ensured to be larger than the space D2 shown in FIG.

When the fixture 100 having such a shape is adopted, the area of the overlapping region 22 between the circuit board 6 and the fixture 100 is narrower than in the second embodiment. Therefore, electrostatic noise can be reduced over a wider area on the circuit board 6 . Further, from a mechanical point of view, when attaching the fixture 100 to the housing 4 having the first insertion portion 31 and the second insertion portion 32 as in the fourth embodiment, the first support portion 1 is caught by the first insertion portion 31 and the risk of the second support portion 2 being caught by the second insertion portion 32 can be reduced.

(Sixth embodiment)
FIG. 9 is a perspective view illustrating the configuration of a fixture 100 included in the electronic control device according to the sixth embodiment.
As shown in FIG. 9, the third support portion 3 of the attachment 100 is provided with holes 11 for connecting the attachment 100 to the vehicle 12 by screwing. The hole 11 is a circular through hole. Vehicle 12 is, for example, the body of an automobile. A screw hole 13 is provided in the vehicle 12 . When the electronic control device 200 is attached to the vehicle 12, first, the hole 11 of the third support portion 3 is inserted into the screw hole 13 of the vehicle 12 while the mounting fixture 100 is attached to the housing 4 that accommodates the circuit board 6. Align. Next, the screw 14 is engaged with the screw hole 13 through the screw hole 13 of the third support portion 3, and in this state, the screw 14 is tightened with an appropriate torque. Thereby, the fixture 100 can be fixed to the vehicle 12 by screwing. In the sixth embodiment, the attachment 100 can be fixed to the vehicle 12 more reliably, although the number of man-hours is increased compared to the plug-in structure described in the third embodiment.

Although FIG. 9 shows an example in which one hole 11 is provided in the third support portion 3, the present invention is not limited to this, and a plurality of holes 11 are provided in the first insertion portion 31. A plurality of screw holes 13 and screws 14 may be provided.

(Seventh embodiment)
FIG. 10 is a perspective view illustrating the configuration of an electronic control unit 200 according to the seventh embodiment.
As shown in FIG. 10, the housing 4 has four sides, one of which is provided with an opening 5, and two longitudinally opposed sides of this opening 5 are provided with first inserts. 31 and a second insert 32 are provided. The first insertion portion 31 and the second insertion portion 32 are arranged so as to sandwich the circuit board 6 (FIG. 1) accommodated in the housing 4 from both sides. It should be noted that the first insertion portion 31 and the second insertion portion 32 are basically different from those of the fourth embodiment shown in FIG. It has the same structure as the form.

On the other hand, in the fixture 100, the shapes of the first support part 1 and the second support part 2 are different compared to the configuration of the second embodiment (FIG. 5). Specifically, the first support portion 1 is formed in a state of being vertically erected (bent) from the third support portion 3, and the second support portion 2 is also vertically erected from the third support portion 3. It is formed in a (bent) state. The first support portion 1 is formed linearly from one end 1a to the other end 1b, and the second support portion 2 is also formed linearly from one end 2a to the other end 2b. Also, the first support portion 1 and the second support portion 2 are arranged in parallel and facing each other.

When attaching the fixture 100 to the housing 4 having the first insertion portion 31 and the second insertion portion 32 described above, the first support portion 1 is inserted into the first insertion portion 31 and the second insertion portion 31 is inserted. The support part 2 is inserted into the second insertion part 32 . Thereby, the first support portion 1 is arranged on one side surface of the housing 4 and the second support portion 2 is arranged on the other side surface of the housing 4 . That is, the first support portion 1 and the second support portion 2 are arranged on both sides of the housing 4 . In this state, the first support portion 1 and the second support portion 2 are fixed to the housing 4 by fixing means such as screws or adhesion. However, the method of fixing the fixture 100 to the housing 4 is not limited to a specific method.

In the seventh embodiment, the first support part 1 and the second support part 2 are fixed to the housing 4 by inserting them into the corresponding first insertion parts 31 and second insertion parts 32 respectively. Thus, the fixture 100 can be attached to the housing 4 . Therefore, the attachment 100 can be mounted on the electronic control unit 200 with a small number of man-hours. Further, since the first support portion 1 and the second support portion 2 are arranged on both side surfaces of the housing 4, when the electronic control device 200 is viewed from above, the first support portion 1 and the second support portion 2 The support part 2 is arranged apart from the circuit board 6 without overlapping with the circuit board 6.例文帳に追加Both the upper surface and the lower surface of the circuit board 6 are arranged at positions separated from the first support portion 1 and the second support portion 2 . Therefore, a wide noise reduction region can be secured.

It should be noted that the present invention is not limited to the above-described embodiments, and includes various modifications. For example, in the above-described embodiments, the details of the present invention have been described for easy understanding, but the present invention is not necessarily limited to having all the configurations described in the above-described embodiments. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is also possible to delete a part of the configuration of each embodiment, add another configuration, or replace it with another configuration.

For example, in the above-described embodiment, the entire housing 4 is made of a non-metallic material, but the present invention is not limited to this, and a part of the housing 4 may be made of a non-metallic material. Specifically, when the housing 4 is composed of a bottomed main body and a lid that closes the opening of the main body, the main body is made of a non-metallic material such as resin, and the lid is made of metal. It can be made of material.

Further, in the above-described embodiment, an example in which all of the integrated circuit 7 and the peripheral circuit 8 are arranged outside the overlap region 22 is shown, but the present invention is not limited to this, and at least part of the integrated circuit 7 and the peripheral circuit 8 It is sufficient if it is arranged outside the overlapping area 22 .

DESCRIPTION OF SYMBOLS 1... 1st support part, 1a... One end, 1b... Other end, 2... Second support part, 2a... One end, 2b... Other end, 3... Third support part, 4... Housing, 6... Circuit Substrate 7 Integrated circuit 8 Peripheral circuit 11 Hole 12 Vehicle 22 Overlapping area 25 Fitting portion 31 First inserting portion 32 Second inserting portion 100 Mounting Tool, 200... Electronic control unit

Claims

A circuit board on which an integrated circuit and a peripheral circuit of the integrated circuit are mounted, a case partially or wholly made of a non-metallic material to accommodate the circuit board, and an attachment for attaching the case to a vehicle and a third supporting portion connecting one end of the first supporting portion and one end of the second supporting portion. and a support portion, wherein a space is provided between the other end of the first support portion and the other end of the second support portion.
The electronic control device according to claim 1, wherein the mounting fixture and the circuit board are arranged so as to overlap each other.
3. The electronic control device according to claim 2, wherein an area of an overlapping region where the mounting fixture and the circuit board overlap is smaller than an area of an inner region that is an inner region of the overlapping region in the circuit board.
2. The electronic control device according to claim 1, wherein the first support portion and the second support portion support one side and the other side opposite to the one side of the housing, respectively.
2. The electronic control device according to claim 1, wherein at least part of said integrated circuit and said peripheral circuit is arranged outside an overlapping region between said mounting fixture and said circuit board.
The first support is formed linearly from one end to the other end,
The electronic control device according to claim 1, wherein the second support portion is formed linearly from one end to the other end.
The electronic control device according to claim 1, wherein the third support portion has a fitting portion for positioning and connecting the attachment to the vehicle.
The electronic control device according to claim 1, wherein the housing has a first insertion portion into which the first support portion is inserted, and a second insertion portion into which the second support portion is inserted.
the first support portion is formed in a tapered shape in which the width gradually narrows from one end to the other end of the first support portion;
2. The electronic control device according to claim 1, wherein the second support portion is tapered such that the width of the second support portion gradually narrows from one end to the other end of the second support portion.
The electronic control device according to claim 1, wherein the third support portion has a hole for screwing the attachment to the vehicle.
The electronic control device according to claim 1, wherein the first support portion and the second support portion are arranged on side surfaces of the housing.