electronic control device

Abstract

The present application provides an electronic control device capable of suppressing malfunction of an electronic component caused by static electricity. The electronic control device (B) of the present application that controls an actuator is provided with a circuit board (5), an electronic component (8) mounted on the circuit board (5), a resin case (7) (insulating case) that holds the circuit board (5), a metal cover (6) (first conductive cover) that covers the resin case (7), an actuator cover (12) (second conductive cover) that holds the resin case (7) and covers an opening portion of the actuator, and a conduction portion (13) that makes the metal cover (6) (first conductive cover) and the actuator cover (12) (second conductive cover) conductive.

Description

Technical Field

[0001] This invention relates to electronic control devices. Background Technology

[0002] In recent years, mechatronics in automotive electronic control devices has been continuously developing. This mechatronics is driven by the increasing number of electronic control devices in vehicles and the shortening of connecting cables between control devices and sensors, and between actuators. Specifically, this includes the integration of engine control actuators with electronic control devices, and the integration of transmissions with electronic control devices. Here, the surface temperature of the engine and transmission is approximately 130°C to 140°C, while the heat resistance of the electronic components used in the electronic control devices is approximately 150°C.

[0003] When the electronic control unit is operated in such a harsh environment, the heat from the engine, transmission, etc., is transferred through the housing of the electronic control unit to the electronic components on the base plate held by the housing, and there is a risk that the temperature of the electronic components will exceed the heat resistance temperature.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2014-075496 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] In the electronic control device disclosed in Patent Document 1, the housing of the substrate is made of metal (alloy), so heat from the engine, transmission, etc., is easily transferred to the electronic components through the housing. Therefore, in order to suppress the temperature rise of the electronic components caused by the heat from the engine, transmission, etc., it is considered to make the housing (heat source side) of the electronic control device made of resin.

[0009] However, this introduces a new problem: when static electricity is applied to the metallic housing (atmospheric side) by the user's hand, it does not discharge to ground (GND) through the housing as in existing structures. If static electricity is released from the metallic housing towards the electronic components, there is a concern that the electronic components may malfunction.

[0010] The purpose of this invention is to provide an electronic control device that can suppress the malfunction of electronic components caused by static electricity.

[0011] Technical means to solve the problem

[0012] To achieve the above objectives, the present invention provides an electronic control device that controls an actuator, comprising: a circuit board; electronic components mounted on the circuit board; an insulating housing that holds the circuit board; a first conductive cover that covers the insulating housing; a second conductive cover that holds the insulating housing and covers the opening of the actuator; and a conductive portion that enables the first conductive cover and the second conductive cover to conduct electricity.

[0013] The effects of the invention

[0014] According to the present invention, it is possible to suppress malfunctions of electronic components caused by static electricity. Other issues, configurations, and effects not described above will be clarified through the following description of embodiments. Attached Figure Description

[0015] Figure 1 A schematic perspective view of a transmission with an electronic control unit installed.

[0016] Figure 2A A schematic perspective view of the male connector on the electronic control device side.

[0017] Figure 2B This is a schematic perspective view of the connector (female) on the transmission side.

[0018] Figure 3 This is a three-dimensional view of the electronic control device.

[0019] Figure 4 This is a diagram showing the unfolded state of the electronic control device.

[0020] Figure 5A A diagram showing the cutting lines of an electronic control device.

[0021] Figure 5B This is a cross-sectional view of the electronic control device.

[0022] Figure 6 This is a perspective view of the electronic control device according to the first embodiment of the present invention.

[0023] Figure 7 This is an unfolded view of the electronic control device according to the first embodiment of the present invention.

[0024] Figure 8A A diagram showing the cutting lines of the electronic control device according to the first embodiment of the present invention.

[0025] Figure 8B This is a cross-sectional view of the electronic control device according to the first embodiment of the present invention.

[0026] Figure 9 This is a perspective view of the electronic control device according to the second embodiment of the present invention.

[0027] Figure 10 This is an unfolded view of the electronic control device according to the second embodiment of the present invention.

[0028] Figure 11A A diagram showing the cutting lines of the electronic control device according to the second embodiment of the present invention.

[0029] Figure 11B This is a cross-sectional view of the electronic control device according to the second embodiment of the present invention.

[0030] Figure 12 This is a perspective view of the electronic control device according to the third embodiment of the present invention.

[0031] Figure 13 This is an unfolded view of the electronic control device according to the third embodiment of the present invention.

[0032] Figure 14A A diagram showing the cutting lines of the electronic control device according to the third embodiment of the present invention.

[0033] Figure 14B This is a cross-sectional view of the electronic control device according to the third embodiment of the present invention.

[0034] Figure 15 This is a perspective view of the electronic control device according to the fourth embodiment of the present invention.

[0035] Figure 16 This is an unfolded view of the electronic control device according to the fourth embodiment of the present invention.

[0036] Figure 17A A diagram showing the cutting lines of the electronic control device according to the fourth embodiment of the present invention.

[0037] Figure 17B This is a cross-sectional view of the electronic control device according to the fourth embodiment of the present invention.

[0038] Figure 18A A diagram showing the cutting lines of the electronic control device according to the fifth embodiment of the present invention.

[0039] Figure 18B This is a cross-sectional view of the electronic control device according to the fifth embodiment of the present invention.

[0040] Figure 19 This is a cross-sectional view of the electronic control device during assembly.

[0041] Figure 20 This is a perspective view of the electronic control device according to the sixth embodiment of the present invention.

[0042] Figure 21 This is an unfolded view of the electronic control device according to the sixth embodiment of the present invention.

[0043] Figure 22 This is a perspective view of the electronic control device according to the seventh embodiment of the present invention.

[0044] Figure 23 This is an unfolded view of the electronic control device according to the seventh embodiment of the present invention.

[0045] Figure 24A A diagram showing the cutting lines of the electronic control device according to the eighth embodiment of the present invention.

[0046] Figure 24B This is a cross-sectional view of the electronic control device according to the eighth embodiment of the present invention.

[0047] Figure 25A A diagram showing the cutting lines of the electronic control device according to the ninth embodiment of the present invention.

[0048] Figure 25B This is a cross-sectional view of the electronic control device according to the ninth embodiment of the present invention.

[0049] Figure 26A This is a diagram showing the cutting lines of the electronic control device according to the 10th embodiment of the present invention.

[0050] Figure 26B This is a cross-sectional view of the electronic control device according to the tenth embodiment of the present invention.

[0051] Figure 27A This is a diagram showing the cutting lines of the electronic control device according to the 11th embodiment of the present invention.

[0052] Figure 27B This is a cross-sectional view of the electronic control device according to the 11th embodiment of the present invention.

[0053] Figure 28 This is a perspective view of the electronic control device according to the 12th embodiment of the present invention.

[0054] Figure 29A This is a diagram showing the cutting lines of the electronic control device according to the 12th embodiment of the present invention.

[0055] Figure 29B This is a cross-sectional view of the electronic control device according to the 12th embodiment of the present invention. Detailed Implementation

[0056] The electronic control device related to the present invention will now be described in detail with reference to the accompanying drawings and examples of embodiments. The electronic control device controls, for example, actuators (such as solenoid valves) used in engines, transmissions, etc. Furthermore, in the figures, the same reference numerals denote the same parts.

[0057] (A general overview of the transmission's structure)

[0058] Figure 1 A schematic perspective view of a transmission 103 with an electronic control device B installed, showing an example of mechatronics in the transmission 103. Figure 1 In this transmission, the transmission 103 includes a mechanism (not shown) that changes and transmits the rotational driving force of the engine, etc., and a gearbox 131 that houses the mechanism.

[0059] The transmission 131 contains lubricating oil to lubricate the mechanism. An electronic control unit (TCU) B is installed on the transmission 131. The transmission 103 and the electronic control unit B are located in the engine compartment (not shown).

[0060] (Connector)

[0061] Figure 2A This is a schematic perspective view of the male connector on side B of the electronic control device. Figure 2B This is a schematic perspective view of the connector (female) on the transmission 103 side. Figure 2A , 2B As shown, the transmission 103 is electrically connected to the electronic control unit B via transmission connectors 132 and 133. Transmission connector 132 protrudes from the transmission 131 to achieve electrical connection with the electronic control unit B. The electronic control unit B is mounted on the main body 134 of the transmission 131 in a manner that closes the opening 131a of the transmission 131.

[0062] (Comparative example)

[0063] Figure 3 This is a perspective view of electronic control device B, which serves as a comparative example with the present invention. Figure 4 Decompose its 3D diagram. Figure 5A , 5B The electronic control device B, for example, is installed in a car for controlling the engine, transmission, or brakes. It generally consists of a circuit board 5, a connector 133, a resin housing 7, and a metal cover 6. The circuit board 5 houses electronic components 8. The connector 133 is mounted on the circuit board 5, electrically connecting the circuit formed on the circuit board 5 to external devices. The housing 7 houses the circuit board 5, and the cover 6 covers the circuit board 5 housed within the housing 7. Furthermore, in addition to the electronic components 8 shown in the figure, the circuit board 5 actually houses multiple other electronic components. The circuit board 5 is held in the resin housing 7, for example, by a fourth fixing member 1 (e.g., a screw).

[0064] The metal cover 6 is held onto the resin box 7 by a first fixing member 2 (e.g., a screw). Furthermore, a sealing member 10, such as an adhesive, is disposed between the metal cover 6 and the resin box 7, and between the metal cover 6 or the resin box 7 and the connector 133, thereby achieving an airtight seal inside the electronic control device. A thermally conductive material 11, such as grease, is disposed between the electronic component 8 and the metal cover 6, or between the circuit board 5 and the metal cover 6, thereby suppressing the temperature rise of the electronic component.

[0065] The resin box 7 is held onto the metal actuator cover 12 by a second fixing member 3 (e.g., a screw). Rubber gaskets 20, for example, are disposed between the actuator cover 12 and the connector 133, and between the actuator cover 12 and the main body 134 of the transmission, thereby achieving a fluid seal inside the transmission. This configuration prevents heat from the lubricating oil, which may reach high temperatures inside the transmission, from being transferred to the metal cover 6 through the resin box 7, which has low thermal conductivity.

[0066] However, this creates a new problem: if static electricity is applied to the metal cover 6 by the user's hand, etc., electrical energy will flow along the path with the lowest resistance, such as metal cover 6 → thermally conductive material 11 → electronic component 8 → circuit board 5 → connector 133 → connector 132 (GND terminal). Therefore, there is a concern that electronic components along this path may malfunction.

[0067] (First Embodiment)

[0068] Next, the configuration of the electronic control device B according to the first embodiment of the present invention will be described. For example... Figure 6 , 7 As shown in 8A and 8B, a conductive part 13 is provided so that the metal cover 6 and the actuator cover 12 make contact at one point, for example.

[0069] That is, in this embodiment, the electronic control device B for controlling the actuator includes at least: a circuit board 5; an electronic component 8 mounted on the circuit board 5; a resin box 7 (insulating box) that holds the circuit board 5; a metal cover 6 (first conductive cover) that covers the resin box 7; an actuator cover 12 (second conductive cover) that holds the resin box 7 and covers the opening of the actuator; and a conductive part 13 that makes the metal cover 6 (first conductive cover) and the actuator cover 12 (second conductive cover) conductive.

[0070] This creates a path with low resistance, allowing static electricity applied to the metal cover 6 to flow through the path from the metal cover 6 to the actuator cover 12 to GND, without passing through the electronic component 8. Therefore, damage to the electronic component 8 can be prevented. Furthermore, by providing only one conductive section 13, for example, heat from the lubricating oil inside the transmission can be reduced, enabling a highly reliable electronic control device within the mechatronic structure.

[0071] Furthermore, in this embodiment, the electronic control device B includes a first fixing member 2 (metal cover fixing screw) and a second fixing member 3 (resin box fixing screw). The first fixing member 2 (metal cover fixing screw) fixes the metal cover 6 (first conductive cover) to the resin box 7 (insulating box) in a state where it does not contact the actuator cover 12 (second conductive cover). The second fixing member 3 (resin box fixing screw) fixes the resin box 7 to the actuator cover 12 in a state where it does not contact the metal cover 6.

[0072] Thus, the metal cover 6 (first conductive cover), resin box 7 (insulating box), and actuator cover 12 (second conductive cover) can be fixed together as a single unit. Furthermore, heat is not easily transferred from the actuator cover 12 (second conductive cover) to the metal cover 6 via the first fixing member 2 (metal cover fixing screw) or the second fixing member 3 (resin box fixing screw). The first fixing member 2 is not limited to a screw; for example, it can also be a riveted, adhesive, or snap-fit ​​connection. The second fixing member 3 is not limited to a screw; it can also be a riveted, adhesive, or snap-fit ​​connection.

[0073] Furthermore, as described above, in this embodiment, the conductive part 13 makes the metal cover 6 (first conductive cover) and the actuator cover 12 (second conductive cover) connected at only one location. As a result, heat is not easily transferred from the actuator cover 12 (second conductive cover) to the metal cover 6.

[0074] In detail, the metal cover 6 (first conductive cover) has a terminal-shaped portion 6T, and the actuator cover 12 (second conductive cover) has a base 12P opposite to the terminal-shaped portion 6T. The conductive portion 13 is composed of the terminal-shaped portion 6T of the metal cover 6 and the base 12P of the actuator cover 12.

[0075] Furthermore, the electronic control device B includes a fourth fixing member 1 for fixing the circuit board 5 to the resin box 7 (insulating box). The fourth fixing member 1 may be, for example, a screw, rivet, adhesive, or snap-fit.

[0076] As explained above, according to this embodiment, it is possible to suppress the malfunction of electronic components caused by static electricity.

[0077] (Second Implementation)

[0078] like Figure 9 , 10 As shown in 11A and 11B, the metal cover 6 and the actuator cover 12 are fastened together by the third fixing member 4 (conducting screw), thereby maintaining the conduction between the metal cover 6 and the actuator cover 12 even under large vibration, thus realizing an electronic control device with higher reliability than the first embodiment.

[0079] That is, the metal cover 6 (first conductive cover) and the actuator cover 12 (second conductive cover) are fixed at the conductive portion 13. In this embodiment, the metal cover 6 (first conductive cover) and the actuator cover 12 (second conductive cover) are fixed at only one location in the conductive portion 13. As a result, heat is not easily transferred from the actuator cover 12 (second conductive cover) to the metal cover 6.

[0080] In detail, the conductive part 13 includes a third fixing member 4 (conductive screw) for fixing the metal cover 6 (first conductive cover) to the actuator cover 12 (second conductive cover). The third fixing member 4 is made of conductive materials such as conductive resin and conductive metal.

[0081] (Third implementation)

[0082] like Figure 12 , 13 As shown in 14A and 14B, the same effect as in the second embodiment can be obtained when the resin box 7 is arranged between the metal cover 6 and the actuator cover 12.

[0083] That is, in this embodiment, the third fixing member 4 (conductive screw) overlaps and fixes the metal cover 6 (first conductive cover) and the resin box 7 (insulating box) onto the actuator cover 12 (second conductive cover).

[0084] (Fourth implementation)

[0085] like Figure 15 , 16 As shown in 17A and 17B, by moving the conductive portion 13 away from the circuit board, the thermal resistance from the conductive portion 13 to the electronic component 8 can be increased compared to the third embodiment. As is well known, thermal resistance is defined by the following formula; moving the conductive portion 13 away from the circuit board is equivalent to increasing I in the following formula, therefore the thermal resistance R... T Increase.

[0086] R T =I / kA

[0087] Here, R T : Thermal resistance [k / W], I: Thickness [m], k: Thermal conductivity [W / m / K], A: Heat transfer area [m²] 2 ].

[0088] Therefore, on the one hand, it can prevent damage to electronic components caused by static electricity, and on the other hand, it can make it more difficult for the heat from the lubricating oil inside the transmission to be transferred to the electronic components.

[0089] However, regarding the retention of the resin box 7 or the metal cover 6, fixing it as close as possible to the circuit board 5 can shorten the distance between fixing points, thus improving the vibration resistance of the electronic control device B. Therefore, for example, by making the minimum distance L1 between the third fixing member 4 (conductive screw) and the end 5a of the circuit board longer than the minimum distance L2 between the first fixing member 2 (metal cover fixing screw) and the end 5a of the circuit board or the minimum distance L3 between the second fixing member 3 (resin box fixing screw) and the end 5a of the circuit board, a highly reliable electronic control device can be achieved.

[0090] That is, in this embodiment, the minimum distance L1 between the third fixing member 4 (conductive screw) and the circuit board 5 is longer than the maximum distance L2 between the first fixing member 2 (metal cap fixing screw) and the circuit board 5. In addition, the minimum distance L1 between the third fixing member 4 (conductive screw) and the circuit board 5 is longer than the maximum distance L3 between the second fixing member 3 (resin box fixing screw) and the circuit board 5.

[0091] (Fifth implementation)

[0092] like Figure 18A , 18B As shown, reducing the thickness of the metal cover 6 can also increase the heat transfer resistance. Reducing the thickness of the metal cover 6 is equivalent to reducing A in the above formula, so the heat transfer resistance R... T Increased. Therefore, it makes it more difficult for heat from the lubricating oil inside the transmission to be transferred to the electronic components.

[0093] However, indiscriminately thinning the entire metal cover will directly reduce the mechanical strength of the metal cover 6, thus reducing the vibration resistance and impact resistance of the electronic control device B. In particular, thinning the thickness of the first fixing member 2 (metal cover fixing screw) that holds the metal cover 6 can easily lead to damage to the metal cover 6. Therefore, for example, making the metal cover thickness t1 of the conductive part thinner than the metal cover thickness t2 of the first fixing member 2 (metal cover fixing screw) can achieve a highly reliable electronic control device.

[0094] That is, in this embodiment, the wall thickness t1 of the metal cover 6 (first conductive cover) at the conductive part 13 is thinner than the wall thickness t2 of the metal cover 6 (first conductive cover) around the first fixing member 2.

[0095] (Sixth implementation)

[0096] In the electronic control devices up to the fifth embodiment, other problems besides static electricity resistance and heat resistance also arise. For example... Figure 19As shown, the components opposite to the metal cover 6 are the resin box 7 and the actuator cover 12, so their assembly references are sometimes different. For example, when the height of the reference surface Y, which is fastened by the third fixing member 4 (conducting screw), is different from the reference surface X, which is fastened by the first fixing member 2 (metal cover fixing screw), gaps G may sometimes occur in the conductive part 13 due to dimensional tolerances or warping of the components. As a result, there may be cases where the metal cover 6 or resin box 7 is subjected to high stress due to the forced fastening by the third fixing member 4 (conducting screw) (21).

[0097] Therefore, in order to solve this problem, for example, like Figure 20 , 21 As shown, a tapered portion 14a with an angle of approximately 45° relative to the conductive surface 6a is provided at the root of the metal cover 6 of the conductive portion 13. This makes the metal cover 6 easier to deform, reducing stress on the metal cover 6 and the resin housing 7. Furthermore, there is no reduction in the thermal resistance of the metal cover 6 due to the tapered portion 14a. Therefore, compared to the fifth embodiment, a more reliable electronic control device can be achieved without compromising electrostatic resistance or heat resistance.

[0098] That is, in this embodiment, a cone 14a is formed on the metal cover 6 (first conductive cover) at the conductive portion 13. The cone 14a is composed of an inclined surface that is inclined relative to the surface where the metal cover 6 (first conductive cover) overlaps with the resin box 7 (insulating box) or the actuator cover 12 (second conductive cover). The inclined surface is composed of two symmetrical surfaces. In this embodiment, the inclined surface is triangular.

[0099] Thus, on the one hand, the cone 14a can be made to not interfere with the third fixing member 4 (conductive screw), and on the other hand, the distance away from the side of the metal cover 6 (first conductive cover) can be extended. As a result, the metal cover 6 is easier to deform, which can reduce the stress generated by the metal cover 6 and the resin box 7.

[0100] (Seventh implementation)

[0101] like Figure 22 , 23 As shown, a roughly semi-circular cone 14b is provided at the root of the metal cover 6 of the conductive part 13, thereby achieving the same effect as in the sixth embodiment, and thus realizing a highly reliable electronic control device.

[0102] That is, in this embodiment, the cone 14b is formed by a curved surface. The cone 14b is, for example, semi-circular. In other words, the cone 14b has a semi-tubular shape. As a result, the metal cover 6 is easier to deform, which can reduce the stress generated by the metal cover 6 and the resin box 7. In addition, the space between the third fixing member 4 (conducting screw) and the cone 14b can be widened, so the installation of the third fixing member 4 becomes easier.

[0103] (Eighth embodiment)

[0104] like Figure 24A , 24B As shown, the guide portion 13 is made open by using the rivet 15, thereby achieving the same effect as in the second embodiment.

[0105] In other words, the third fixing member 4 is riveted 15. As a result, for example, the number of parts is reduced.

[0106] (9th implementation)

[0107] like Figure 25A , 25B As shown, the guide portion 13 is made open by using rivets 15 to penetrate the resin box 7, thereby achieving the same effect as in the third embodiment.

[0108] (10th implementation)

[0109] like Figure 26A , 26B As shown, the conductive part 13 is made conductive by using a conductive adhesive 16, thereby achieving the same effect as in the second embodiment.

[0110] In other words, the third fixing member 4 is a conductive adhesive 16 that enables the metal cover 6 (the first conductive cover) to conduct electricity with the actuator cover 12 (the second conductive cover). Thus, for example, it is not necessary to provide a hole for the third fixing member 4 in the metal cover 6.

[0111] (11th embodiment)

[0112] like Figure 27A , 27B As shown, by using a conductive adhesive 16 to make the conductive part 13 conductive in a way that penetrates the resin box 7, the same effect as in the third embodiment can be obtained.

[0113] (12th implementation)

[0114] As is well known, metal nuts / collars are inserted into the screw fastening parts on the resin box 7 to facilitate tapping or prevent resin creep. Therefore, as Figure 28 , Figure 29A , 29BAs shown, an integral collar 19 is provided in the conductive part 13 to integrate the first fixing member 2 (screw) insert nut 17 and the second fixing member 3 (screw) insert collar 18, thereby achieving the same effect as in the first embodiment.

[0115] That is, in this embodiment, the electronic control device B is equipped with an integral collar 19 (first conductive collar) embedded in the resin box 7 (insulating box) in the conductive part 13. The integral collar 19 (first conductive collar) is formed by integrating the second conductive collar 17 corresponding to the first fixing member 2 (metal cover fixing screw) and the third conductive collar 18 corresponding to the second fixing member 3 (resin box fixing screw). In other words, the third fixing member 4 (conductive screw) is composed of the first fixing member 2 (metal cover fixing screw) and the second fixing member 3 (resin box fixing screw).

[0116] This ensures a discharge path for static electricity applied to the metal cover 6, while reducing stress on the metal cover 6 and the resin box 7.

[0117] Furthermore, this invention includes various modifications and is not limited to the embodiments described above. For example, the above embodiments are detailed descriptions provided to illustrate the invention in an easily understandable manner and are not necessarily limited to all the described configurations. Additionally, a portion of the configuration of one embodiment may be replaced with the configuration of another embodiment, and the configuration of one embodiment may be added to the configuration of another embodiment. Furthermore, other configurations may be added, deleted, or replaced in parts of the configurations of each embodiment.

[0118] Furthermore, the embodiments of the present invention may take the following forms.

[0119] (1). An electronic control device comprising: a circuit board on which electronic components and connectors are mounted; an insulating housing holding the circuit board; a first conductive cover covering the insulating housing; a thermally conductive material disposed between the electronic components and the first conductive cover or between the circuit board and the first conductive cover; and a second conductive cover holding the insulating housing and making the actuator interior liquid-tight, characterized in that it comprises a conductive portion that makes the first conductive cover and the second conductive cover conductive.

[0120] (2). According to the electronic control device of (1), the first conductive cover is fixed to the insulating box in a state of not contacting the second conductive cover by means of the first fixing part, and the insulating box is fixed to the second conductive cover in a state of not contacting the first conductive cover by means of the second fixing part.

[0121] (3). The electronic control device according to any one of (1) or (2), wherein the conductive portion enables the first conductive cover and the second conductive cover to be conductive at only one location.

[0122] (4). The electronic control device according to any one of (1) to (3), wherein the conductive part fixes the first conductive cover and the second conductive cover.

[0123] (5). The electronic control device according to any one of (1) to (4), wherein the conductive part fixes the first conductive cover and the second conductive cover at only one location.

[0124] (6) The electronic control device according to any one of (1) to (5), wherein the minimum distance L1 between the conductive part and the circuit board is longer than the maximum distance L2 between the first fixing member 2 and the circuit board.

[0125] (7) The electronic control device according to any one of (1) to (6), wherein the minimum distance L1 between the conductive part and the circuit board is longer than the maximum distance L3 between the second fixing member 3 and the circuit board.

[0126] (8). The electronic control device according to any one of (1) to (7), wherein the wall thickness of the first conductive cover is thicker at the first fixing part than at the conductive part.

[0127] (9) The electronic control device according to any one of (1) to (8), wherein a tapered portion is formed on the first conductive cover at an angle of approximately 45° relative to the conductive surface in the conductive portion.

[0128] (9-1). The electronic control device according to any one of (1) to (8), wherein a cone portion is formed in a generally semi-circular shape on the first conductive cover portion.

[0129] (10). The electronic control device according to any one of (1) to (9-1), wherein the conductive part is riveted.

[0130] (11). The electronic control device according to (10), wherein the conductive part is riveted to fix the first conductive cover and the second conductive cover in such a way that the insulating box body is sandwiched in the middle.

[0131] (12). The electronic control device according to any one of (1) to (9-1), wherein the conductive part is fixed to the first conductive cover and the second conductive cover by the third fixing member 4.

[0132] (13). The electronic control device according to any one of (1) to (9-1), wherein the conductive part is fixed to the first conductive cover and the second conductive cover by the third fixing member 4.

[0133] (14). According to the electronic control device of (13), wherein the third fixing member 4 fixes the first conductive cover and the second conductive cover in such a way that the insulating box is sandwiched in the middle.

[0134] (15). The electronic control device according to any one of (13) or (14), wherein the third fixing member 4 is a screw.

[0135] (16). The electronic control device according to any one of (13) or (14), wherein the third fixing member 4 is a conductive adhesive that makes the first conductive cover and the second conductive cover conductive.

[0136] (17). The electronic control device according to any one of (1) to (16), wherein the circuit board is fixed in the insulating housing by riveting.

[0137] (18). The electronic control device according to any one of (1) to (16), wherein the circuit board is fixed in the insulating housing by a snap-fit.

[0138] (19). The electronic control device according to any one of (1) to (16), wherein the circuit board is fixed in the insulating housing by the fourth fixing member 1.

[0139] (20). According to the electronic control device described in (19), the fourth fixing member 1 is a screw.

[0140] (21). According to the electronic control device described in (19), the fourth fixing member 1 is an adhesive.

[0141] (22). The electronic control device according to any one of (1) to (21), wherein the first fixing part is riveted.

[0142] (23). The electronic control device according to any one of (1) to (21), wherein the first fixing part is a snap-fit.

[0143] (24). The electronic control device according to any one of (1) to (21), wherein the first fixing part is fixed by the first fixing member 2.

[0144] (25). According to the electronic control device described in (24), the first fixing member 2 is a screw.

[0145] (26). According to the electronic control device described in (24), the first fixing member 2 is an adhesive.

[0146] (27). The electronic control device according to any one of (1) to (26), wherein the second fixing part is riveted.

[0147] (28). The electronic control device according to any one of (1) to (26), wherein the second fixing part is a snap-fit.

[0148] (29). The electronic control device according to any one of (1) to (26), wherein the second fixing part is fixed by the second fixing member 3.

[0149] (30). According to the electronic control device described in (29), the second fixing member 3 is a screw.

[0150] (31). According to the electronic control device described in (29), the second fixing member 3 is an adhesive.

[0151] (32). The electronic control device according to any one of (1) to (31), wherein the first fixing member 2 is the same as the third fixing member 4.

[0152] (33). The electronic control device according to any one of (1) to (32), wherein the second fixing member 3 is the same as the third fixing member 4.

[0153] (34). The electronic control device according to any one of (1) to (33), wherein a first conductive collar is embedded in the conductive portion on the insulating housing.

[0154] (35). According to the electronic control device of (34), the first conductive collar is integral with the second conductive collar embedded in the first fixing part on the insulating housing.

[0155] (36). According to the electronic control device of (34), the first conductive collar is integral with the third conductive collar embedded in the second fixing part on the insulating housing.

[0156] Symbol Explanation

[0157] B…Electronic control device

[0158] 1…Fixing components (base plate fixing screws)

[0159] 2…Fixing components (metal cover fixing screws)

[0160] 3…Fixing components (resin box fixing screws)

[0161] 4…Fixing components (guide screws)

[0162] 5…Circuit board

[0163] 5a…End of circuit board

[0164] 6…Metal cap (first conductive cap)

[0165] 6a…conducting surface

[0166] 7… Resin box (insulating box)

[0167] 8… Electronic components

[0168] 10… Sealing components (adhesives)

[0169] 11… Thermal conductive materials

[0170] 12…Actuator cover (second conductive cover)

[0171] 13…Conduction Section

[0172] 14a…approximately 45° cone

[0173] 14b…roughly semi-circular cone-shaped part

[0174] 15… Rivets

[0175] 16…Conductive adhesives

[0176] 17…First fixing member 2 (screw) with embedded nut

[0177] 18…Second fixing member 3 (screw) with embedded collar

[0178] 19… Integrated collar

[0179] 20… Sealing component (rubber gasket)

[0180] 21… Location of stress generation

[0181] The minimum distance between L1…the third fixing member 4 (conducting screw) and the end 5a of the circuit board.

[0182] The maximum distance between L2…the first fixing member 2 (metal cap fixing screw) and the end 5a of the circuit board.

[0183] The maximum distance between L3…the second fixing member 3 (resin box fixing screw) and the end 5a of the circuit board.

[0184] t1…Thickness of the metal cover of the conductive part

[0185] t2…Thickness of the metal cover of the first fixing member 2 (metal cover fixing screw)

[0186] 103… Transmission

[0187] 131… Gearbox

[0188] 132… Gearbox connector (female side)

[0189] 133… Gearbox Connector (Male Side)

[0190] 131a… Gearbox opening

[0191] 134…Main body of the gearbox

[0192] G…gap

[0193] X…Benchmark 1

[0194] Y…Benchmark 2.

Claims

1. An electronic control device, comprising a control actuator, characterized in that, have: Circuit board; Electronic components, which are mounted on the circuit board; An insulating housing that holds the circuit board; A first conductive cover that covers the insulating box; A second conductive cover retains the insulating housing and covers the opening of the actuator; A conductive part that enables the first conductive cover to conduct electricity with the second conductive cover; The first fixing member (2) fixes the first conductive cover to the insulating box in a state where it is not in contact with the second conductive cover; and The second fixing member (3) fixes the insulating box to the second conductive cover in a state where it is not in contact with the first conductive cover.

2. The electronic control device according to claim 1, characterized in that, The conductive portion enables the first conductive cover and the second conductive cover to be connected at only one location.

3. The electronic control device according to claim 2, characterized in that, The first conductive cover and the second conductive cover are fixed in the conductive part.

4. The electronic control device according to claim 3, characterized in that, The first conductive cover and the second conductive cover are fixed at only one location in the conductive part.

5. The electronic control device according to claim 1, characterized in that, The conductive part includes a third fixing member (4) for fixing the first conductive cover to the second conductive cover. The minimum distance L1 between the third fixing member (4) and the circuit board is longer than the maximum distance L2 between the first fixing member (2) and the circuit board.

6. The electronic control device according to claim 5, characterized in that, The minimum distance L1 between the third fixing member (4) and the circuit board is longer than the maximum distance L3 between the second fixing member (3) and the circuit board.

7. The electronic control device according to claim 1, characterized in that, The wall thickness t1 of the first conductive cover at the conductive part is thinner than the wall thickness t2 of the first conductive cover around the first fixing member (2).

8. The electronic control device according to claim 1, characterized in that, A cone is formed on the first conductive cover at the conductive portion.

9. The electronic control device according to claim 8, characterized in that, The cone is formed by an inclined surface that is inclined relative to the surface where the first conductive cover overlaps with the insulating box or the second conductive cover.

10. The electronic control device according to claim 9, characterized in that, The inclined surface is composed of two symmetrical surfaces.

11. The electronic control device according to claim 10, characterized in that, The inclined surface is triangular.

12. The electronic control device according to claim 8, characterized in that, The cone is composed of curved surfaces.

13. The electronic control device according to claim 12, characterized in that, The cone-shaped portion is semi-circular.

14. The electronic control device according to claim 12, characterized in that, The cone has a semi-tubular shape.

15. The electronic control device according to claim 1, characterized in that, The conductive portion is equipped with a first conductive collar (19) embedded in the insulating housing.

16. The electronic control device according to claim 15, characterized in that, The first conductive collar (19) is formed by integrating the second conductive collar (17) corresponding to the first fixing member (2) and the third conductive collar (18) corresponding to the second fixing member (3).

17. The electronic control device according to claim 16, characterized in that, The third fixing member (4) is composed of the first fixing member (2) and the second fixing member (3).

18. The electronic control device according to claim 1, characterized in that, The first conductive cover has a terminal-shaped portion. The second conductive cover has a base opposite to the terminal-shaped portion. The conductive part is composed of the terminal-shaped part of the first conductive cover and the base of the second conductive cover.

19. The electronic control device according to claim 18, characterized in that, The conductive portion includes a third fixing member (4) for fixing the first conductive cover to the second conductive cover.

20. The electronic control device according to claim 19, characterized in that, The third fixing component (4) is a screw.

21. The electronic control device according to claim 19, characterized in that, The third fixing member (4) is riveted.

22. The electronic control device according to claim 19, characterized in that, The third fixing member (4) is a conductive adhesive that makes the first conductive cover and the second conductive cover conductive.

23. The electronic control device according to claim 19, characterized in that, The third fixing member (4) overlaps and fixes the first conductive cover and the insulating box onto the second conductive cover.

24. The electronic control device according to claim 1, characterized in that, It has a fourth fixing member (1) for fixing the circuit board (5) to the insulating housing (7).

25. The electronic control device according to claim 24, characterized in that, The fourth fixing component (1) is a screw, rivet, adhesive or snap fastener.

26. The electronic control device according to claim 1, characterized in that, The first fixing component (2) is a screw, rivet, adhesive or snap fastener.

27. The electronic control device according to claim 1, characterized in that, The second fixing component (3) is a screw, rivet, adhesive or snap fastener.

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