Splashproof sheet and electronic control unit

Abstract

To provide a drip-proof sheet that can be easily positioned. [Solution] The electronic control unit 1 comprises a circuit board 10 on which an external connection connector 13 is mounted on a wiring board 11, and housings 20 and 30 that house the circuit board 10 with the external connection connector 13 exposed. The drip-proof sheet 40 is attached to the electronic control unit 1. The drip-proof sheet 40 comprises a fixing portion 41 that is fixed to the electronic control unit 1, and a drip-proof portion 43 that protrudes from the side wall portion 21 where the external connection connector 13 is exposed, thereby suppressing water exposure to the external connection connector 13. The drip-proof sheet 40 is also attached to the electronic control unit 1 by engagement and includes a positioning portion 42 for positioning the drip-proof portion 43 so that it protrudes from the side wall portion 21 while the fixing portion 41 is fixed to the electronic control unit 1.

Description

Technical Field

[0005]

[0001] The present disclosure relates to a drip-proof sheet and an electronic control unit.

Background Art

[0002] As disclosed in Patent Document 1, there is a case for a vehicle electronic control unit provided with a waterproof eaves for suppressing water ingress into a connector.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, as an example of a technique for suppressing water ingress into a connector, it is conceivable to attach a drip-proof sheet to a housing with double-sided tape. Such a drip-proof sheet needs to be attached without being displaced so as to suppress water ingress into the connector. In addition, in an electronic control unit in which a drip-proof sheet is attached to an electronic control device, there is also a possibility that water ingress cannot be suppressed due to displacement of the drip-proof sheet.

[0005] 8>One object of the disclosure is to provide a drip-proof sheet that can be easily positioned.

[0006] Another object of the disclosure is to provide an electronic control unit that can suppress water ingress.

Means for Solving the Problems

[0008] Thus, the drip-proof sheet has a positioning portion that is attached to the electronic control unit by engagement. Therefore, when attaching the drip-proof sheet to the electronic control unit, the fixing portion is fixed to the electronic control unit, and the position is easily determined so that the drip-proof portion protrudes from the connector wall. As a result, the drip-proof sheet can be easily positioned relative to the electronic control unit to suppress water exposure to the connector.

[0009] The electronic control unit disclosed herein is An electronic control device (1) comprising a circuit board (10) on which a connector (13) is mounted on a wiring board (11), and a housing (20, 30) that houses the circuit board with the connector exposed, An electronic control unit comprising a drip-proof sheet (40, 40a, 40b) attached to an electronic control device, The housing has a connector wall portion (21) in which the connector is exposed. The water-resistant sheet is Fixed parts (41, 41b) that are fixed to the electronic control unit, A drip-proof portion (43) is provided protruding from the connector wall portion (21) to suppress water exposure to the connector, It is attached to the electronic control unit by engagement and includes positioning parts (42, 42a, 42b) for positioning the drip-proof part so that it protrudes from the connector wall while the fixing part is fixed to the electronic control unit.

[0010] The electronic control unit disclosed herein is equipped with a drip-proof sheet that can be easily positioned relative to the electronic control unit to suppress water exposure to the connector. Therefore, the electronic control unit can suppress water exposure to the connector.

[0011] The various embodiments disclosed in this specification employ different technical means to achieve their respective objectives. The claims and the reference numerals in parentheses in this section are intended to illustrate an example of correspondence with parts of the embodiments described later, and are not intended to limit the technical scope. The objectives, features, and effects disclosed in this specification will become clearer by referring to the subsequent detailed description and the accompanying drawings. [Brief explanation of the drawing]

[0012] [Figure 1] This is a perspective view showing the schematic configuration of the electronic control unit in the first embodiment. [Figure 2] This is a plan view showing the schematic configuration of the electronic control unit in the first embodiment. [Figure 3] This is a perspective view showing the schematic configuration of the electronic control unit in the first embodiment. [Figure 4] This is a perspective view showing the schematic configuration of the electronic control unit and the drip-proof sheet in the first embodiment. [Figure 5] This is a perspective view showing the schematic configuration of the electronic control unit in Modification Example 1. [Figure 6] This is a perspective view showing the schematic configuration of the electronic control unit in modified example 2. [Figure 7] This is a perspective view showing the schematic configuration of the electronic control unit in modified example 3. [Figure 8] This is a perspective view showing the schematic configuration of the electronic control unit in the second embodiment. [Figure 9] This is a perspective view showing the schematic configuration of the electronic control unit in the third embodiment. [Figure 10]It is a plan view showing a schematic configuration of an electronic control unit in the third embodiment. [Figure 11] It is a plan view showing a schematic configuration of an electronic control unit in the fourth embodiment. [Figure 12] It is a perspective view showing a schematic configuration of an electronic control unit in the fourth embodiment.

Modes for Carrying Out the Invention

[0013] Hereinafter, a plurality of modes for implementing the present disclosure will be described with reference to the drawings. In each mode, the same reference numerals may be given to the parts corresponding to the matters described in the preceding mode, and redundant descriptions may be omitted. In each mode, when only a part of the configuration is described, the other parts of the configuration may be applied by referring to the other modes described previously. In the following, three mutually orthogonal directions are shown as the X direction, the Y direction, and the Z direction.

[0014] (First Embodiment) The drip-proof sheet 40 and the electronic control unit 100 of the first embodiment will be described with reference to FIGS. 1 to 4. As shown in FIG. 1, the electronic control unit 100 includes an electronic control device 1 and a drip-proof sheet 40 attached to the electronic control device 1. The electronic control unit 100 is configured to be mounted on a moving body, for example. Examples of the moving body include vehicles such as electric vehicles, hybrid vehicles, and fuel cell vehicles, flying bodies such as electric vertical take-off and landing aircraft and drones, ships, construction machinery, and agricultural machinery. In this embodiment, as an example, the electronic control unit 100 mounted on a vehicle is adopted.

[0015] Note that the state in which the electronic control unit 100 is mounted on a vehicle is also simply referred to as a mounted state. Also, the state in which the drip-proof sheet 40 is attached to the electronic control device 1 is also simply referred to as an attached state.

[0016] <Electronic Control Device> As shown in Figures 1, 2, and 3, the electronic control unit 1 comprises a circuit board 10 and housings 20 and 30 that form a housing space for the circuit board 10. The circuit board 10 comprises two wiring boards 11 and 14 and electronic components 12, 13, 15-17 mounted on the wiring boards 11 and 14. The area outside the housings 20 and 30 is also referred to as the external space.

[0017] The wiring boards 11 and 14 comprise an electrically insulating substrate and conductive wiring provided on the substrate. The wiring boards 11 and 14 are so-called printed circuit boards. The wiring boards 11 and 14 are stacked in the Z direction.

[0018] The wiring board 11 has circuit elements 12 and an external connection connector 13 mounted on it as electronic components. The wiring board 14 has circuit elements 15 and a debug connector 16 mounted on it as electronic components. In addition, the wiring boards 11 and 14 have an inter-board connector 17 mounted on them as electronic components. Electronic components 12, 13, 15-17 are electrically connected to the wiring.

[0019] The wiring board 11 may have multiple circuit elements 12 mounted on it. Similarly, the wiring board 14 may have multiple circuit elements 15 mounted on it.

[0020] The external connection connector 13 includes a terminal 13t and a connector case enclosing the terminal 13t. A portion of the terminal 13t is located within the housing space and connected to the wiring. The terminal 13t is also exposed outside the housing space.

[0021] The external connection connector 13 is for electrically connecting the electronic control unit 1 to in-vehicle equipment different from the electronic control unit 1. The mating connector 200 is connected to the external connection connector 13. The mating connector 200 is connected to the external connection connector 13 when it is mounted. The mating connector 200 will be explained in the modified example. The in-vehicle equipment includes the controlled device, sensors, and other electronic control units.

[0022] In Figure 3, the symbol X1 indicates the end position of the external connection connector 13 in the X direction. Furthermore, the connector end X1 is the end position on the external space side. The position of the connector end X1 in the X direction coincides with the side wall portion 21. However, the external connection connector 13 may protrude beyond the side wall portion 21. In this case, the positions of the connector end X1 and the side wall portion 21 in the X direction will be different.

[0023] In this embodiment, as an example, an electronic control unit 1 equipped with three external connection connectors 13 is used. The three external connection connectors 13 are arranged in a line in the Y direction. However, the electronic control unit 1 only needs to be equipped with at least one external connection connector 13. The external connection connector 13 corresponds to a connector.

[0024] The debug connector 16 includes terminals 16t and a connector case enclosing terminals 16t. A portion of terminals 16t is located within the housing space and connected to the wiring. The remaining portion of terminals 16t is exposed outside the housing space.

[0025] The debug connector 16 is connected to the mating connector 200 during the development of the electronic control unit 1 or when analyzing malfunctions of the electronic control unit 1. The debug connector 16 is not electrically connected to the in-vehicle equipment. In other words, the mating connector 200 is not connected to the debug connector 16 when it is installed. The debug connector 16 can be said to be in an idle state when it is installed. Furthermore, the debug connector 16 is an idle connector that is not connected to the mating connector 200 during the normal operation of the electronic control unit 1. Normal operation of the electronic control unit 1 refers to operation in the installed state.

[0026] Therefore, even when the debug connector 16 is mounted, the drip-proof sheet 40 (positioning part 42), which will be explained later, can be attached. The debug connector 16 corresponds to a specific connector. The mating connector 200 connected to the debug connector 16 is connected to an inspection device, analysis device, etc.

[0027] The specific connector to which the positioning unit 42 is attached is not limited to the debug connector 16. Any specific connector can be used as long as the mating connector 200 is not connected when it is mounted. The specific connector may be, for example, a connector that is not used depending on the vehicle variation. The board-to-board connector 17 is for electrically connecting the wiring boards 11 and 14.

[0028] In this embodiment, as an example, a circuit board 10 having two wiring boards 11 and 14 is used. As described above, circuit board 11 has circuit elements 12 and connectors 13 mounted on it. Similarly, circuit board 14 has circuit elements 152 and connectors 16 mounted on it. Therefore, the electronic control unit 1 can be considered to have two circuit boards. However, this disclosure can also be used with a circuit board 10 having only one wiring board.

[0029] The housings 20 and 30 comprise a base 20 and a cover 30. The base 20 comprises annularly shaped side walls 21 to 24 and a bottom wall 25 connected to one side of the side walls 21 to 24. The base 20 is concave, formed by the side walls 21 to 24 and the bottom wall 25.

[0030] As shown in Figure 2, the side wall portion 21 has a recessed portion in the Z direction. In other words, the side wall portion 21 has a recessed portion in the Z direction relative to the cover 30, which will be explained later. The external connection connector 13 is arranged in this recessed portion. The recessed portion can also be called the connector arrangement portion. The connector arrangement portion may be a through hole that penetrates the side wall portion 21 in the X direction. The side wall portion 21 corresponds to the connector wall portion.

[0031] Side wall 22 faces side wall 21 in the X direction. A debug connector 16 is located on side wall 22. Side wall 22 is provided with a through hole for arranging the debug connector 16, for example. Side wall 22 corresponds to the opposing wall. The direction from side wall 22 towards side wall 21 is also referred to as the positive X direction. Side wall 23 faces side wall 24 in the Y direction.

[0032] As shown in Figure 3, the cover 30 is positioned opposite the bottom wall portion 25. The cover 30 is provided in a direction that intersects with the side wall portions 21-24. The cover 30 is provided so as to close the opening in the base 20. The base 20 and the cover 30 are assembled together to form a housing space for the circuit board 10. The cover 30 corresponds to the top wall portion.

[0033] As shown in Figures 1 and 2, the circuit board 10 is housed in the housings 20 and 30 with the external connection connector 13 exposed. In other words, a portion of the external connection connector 13 is exposed to the outside of the housing space. This makes the external connection connector 13 ready for connection to the mating connector 200. The side wall portion 21 is exposed from the external connection connector 13. Therefore, it can be said that the housings 20 and 30 have a side wall portion 21 from which the external connection connector 13 is exposed.

[0034] Thus, the external connection connector 13 is exposed to an environment where liquids such as water droplets may adhere to it. Furthermore, the electronic control unit 1 may have liquid adhering to conductive points on the circuit board 10 via the external connection connector 13. These conductive points include terminal 13t, the wiring on the wiring boards 11 and 14, and the terminals of the circuit elements 12 and 15. If liquid adheres to conductive points on the electronic control unit 1, electrical malfunctions such as electrical leakage may occur.

[0035] Therefore, the electronic control unit 100 is equipped with a drip-proof sheet 40 to prevent water from getting on the external connection connector 13. In other words, the electronic control unit 100 is equipped with a drip-proof sheet 40 to prevent water droplets from adhering to the external connection connector 13. The drip-proof sheet 40 will be described below.

[0036] <Waterproof sheet> As shown in Figures 1, 2, 3, and 4, the drip-proof sheet 40 is attached to the electronic control unit 1. The drip-proof sheet 40 is attached to the housings 20 and 30. For example, the drip-proof sheet 40 is attached to part of the base 20 and part of the cover 30.

[0037] The drip-proof sheet 40 can be made of a resin film such as polyethylene or polypropylene. The drip-proof sheet 40 is configured to be foldable. The drip-proof sheet 40 has a Young's modulus such that the portion (drip-proof portion 43) protruding from the housing 20, 30 does not flex under its own weight. However, the drip-proof sheet 40 may have a Young's modulus such that the drip-proof portion 43 flexes under its own weight. The drip-proof sheet 40 can also be referred to as a drip-proof film, drip-proof member, etc.

[0038] The drip-proof sheet 40 has, for example, a rectangular shape. The drip-proof sheet 40 has a fixing portion 41, a positioning portion 42, a drip-proof portion 43, an opposing portion 44, a bent portion 45, and an extended portion 46. In this embodiment, as an example, a drip-proof sheet 40 is used in which the fixing portion 41 and the positioning portion 42 are provided for the integral drip-proof portion 43, the opposing portion 44, the bent portion 45, and the extended portion 46. In other words, the drip-proof portion 43, the opposing portion 44, the bent portion 45, and the extended portion 46 are a single sheet member. However, the drip-proof sheet 40 may also be constructed with the fixing portion 41, the positioning portion 42, the drip-proof portion 43, the opposing portion 44, the bent portion 45, and the extended portion 46 as an integral part.

[0039] The drip-proof sheet 40 is arranged in the following order: drip-proof portion 43, opposing portion 44, bent portion 45, and extended portion 46. The sheet length is defined as the direction from the drip-proof portion 43 towards the extended portion 46. More specifically, the sheet length is the length from the end face on the extended portion 46 side to the end face on the drip-proof portion 43 side. As shown in Figure 3, the end face on the extended portion 46 side is, for example, a surface that aligns with the XY plane in the installed state. On the other hand, the end face on the drip-proof portion 43 side is, for example, a surface that aligns with the YZ plane in the installed state. The direction along the sheet length can also be called the longitudinal direction.

[0040] The XY plane is a virtual plane defined by the X-axis extending in the X direction and the Y-axis extending in the Y direction. The YZ plane is a virtual plane defined by the Y-axis and the Z-axis extending in the Z direction.

[0041] The waterproof sheet 40 has a sheet width defined by its length in the Y direction. The direction along the sheet width can also be called the shorter side. The waterproof sheet 40 has a sheet thickness defined by its length in the Z direction.

[0042] The fixing portion 41 is the part that fixes the drip-proof sheet 40 to the cover 30. Double-sided tape or adhesive can be used for the fixing portion 41. The fixing portion 41 is provided between the opposing portion 44, which will be described later, and the cover 30. The fixing portion 41 is bonded to the opposing portion 44 and the cover 30. The fixing portion 41 corresponds to an adhesive member. Note that the fixing portion 41 may be provided as an integral part with the opposing portion 44. In other words, the fixing portion 41 may be a part of the opposing portion 44 and may have an adhesive function.

[0043] The positioning portion 42 is attached to the extension portion 46. The positioning portion 42 is attached to the debug connector 16 by engagement. The positioning portion 42 is a part for positioning the drip-proof portion 43 so that it protrudes from the side wall portion 21 while the fixing portion 41 is fixed to the electronic control device 1.

[0044] The positioning portion 42 is made of rubber. The positioning portion 42 corresponds to a rubber stopper and sealing member. The positioning portion 42 can also be called a rubber bushing. The positioning portion 42 can also be called an elastically deformable lid member.

[0045] As shown in Figure 3, the positioning portion 42 is attached to the debug connector 16 by, for example, being inserted into the debug connector 16. In other words, the positioning portion 42 is attached to a different location on the electronic control unit 1 than the cover 30. Alternatively, the positioning portion 42 can also be considered to be attached to the side wall portion 22. When the positioning portion 42 is attached to the debug connector 16, it seals the debug connector 16.

[0046] The positioning part 42 can also be said to be attached to the debug connector 16 by engagement. The positioning part 42 can also be said to be attached to the debug connector 16 by mating. The positioning part 42 can also be said to be attached to the debug connector 16 by hooking. In other words, the positioning part 42 is attached to the electronic control unit 1 by a method other than adhesive.

[0047] However, the positioning portion 42 is not limited to this. The positioning portion 42 may be provided by molding together with the drip-proof portion 43, the opposing portion 44, the bent portion 45, and the extended portion 46.

[0048] As shown in Figures 1 and 3, the drip-proof portion 43 is provided so as to protrude from the side wall portion 21 in the X direction. It can also be said that the drip-proof portion 43 is provided so as to protrude from the side wall portion 21 in the positive X direction. Furthermore, the drip-proof portion 43 is provided in the positive X direction with respect to the connector end X1. The drip-proof portion 43 is a part that suppresses water exposure to the external connection connector 13. Therefore, in the mounted state, the drip-proof portion 43 is provided in the opposite direction to the direction of gravity relative to the external connection connector 13. The drip-proof portion 43 can also be called an overhang portion.

[0049] The length of the drip-proof section 43 is set to an extent that can suppress water exposure to the external connection connector 13. The length of the drip-proof section 43 is determined, for example, by experimentation or simulation. The length of the drip-proof section 43 can also be described as the amount of protrusion from the side wall 21 of the drip-proof sheet 40. The length of the drip-proof section 43 is the length in the longitudinal direction.

[0050] The opposing portion 44 is the part that faces the cover 30 in the Z direction. The opposing portion 44 is provided in connection with the drip-proof portion 43 and the bent portion 45. The bent portion 45 is the part that is bent relative to the opposing portion 44. The bent portion 45 is provided in connection with the opposing portion 44 and the extended portion 46. The extended portion 46 is the part that extends from the bent portion 45 to the debug connector 16. The extended portion 46 is the part that faces the side wall portion 22 in the X direction. When mounted, the bent portion 45 and the extended portion 46 are provided in the opposite direction to the direction of gravity relative to the debug connector 16.

[0051] As shown in Figure 3, the sheet length is set such that, with the positioning portion 42 attached to the debug connector 16, the drip-proof portion 43 protrudes beyond the side wall portion 21. The total length of the opposing portion 44, the bent portion 45, and the extended portion 46 is such that it extends along the housing 20, 30 from the debug connector 16 to the end of the cover 30 on the side wall portion 21 side. In other words, with the positioning portion 42 attached to the debug connector 16, the fixing portion 41 is positioned at the end of the cover 30 on the side wall portion 21 side.

[0052] The end of the cover 30 on the side wall portion 21 is part of a surface that aligns with the XY plane. The end of the cover 30 on the side wall portion 21 is the fixing area to which the fixing portion 41 is fixed.

[0053] As shown in Figure 2, the sheet width corresponds to the distance between the first sheet end Y11 on one side and the second sheet end Y12 on the other side of the drip-proof sheet 40. The connector width of the external connection connector 13 is the length along the Y direction. The connector width corresponds to the distance between the first connector end Y1 on one side and the second connector end Y2 on the other side of all external connection connectors 13.

[0054] The sheet width is preferably wider than the connector width. This makes it easier for the drip-proof sheet 40 to prevent water droplets from adhering to the external connection connector 13. The sheet width may also be longer than the distance between the side wall portions 23 and 24.

[0055] As shown in Figure 4, the drip-proof sheet 40 is provided separately from the electronic control unit 1 and is attached to the electronic control unit 1. When attaching the drip-proof section 43, first, the positioning section 42 is inserted into the debug connector 16. In this state, the fixing section 41 is attached to the cover 30. At this time, since the positioning section 42 of the drip-proof sheet 40 is attached to the debug connector 16, it is easy to fix the fixing section 41 in the appropriate place. Also, the drip-proof section 43 of the drip-proof sheet 40 is positioned so that it protrudes more than the side wall section 21.

[0056] <Effects> Thus, the drip-proof sheet 40 is equipped with a positioning portion 42 that is attached to the electronic control unit 1 by engagement. Therefore, when attaching the drip-proof sheet 40 to the electronic control unit 1, the fixing portion 41 is fixed to the electronic control unit 1, and the position is easily determined such that the drip-proof portion 43 protrudes from the side wall portion 21. As a result, the drip-proof sheet 40 can be easily positioned relative to the electronic control unit 1 so as to suppress water from entering the external connection connector 13.

[0057] The drip-proof sheet 40 can be fixed to the electronic control unit 1 by the fixing part 41 while the positioning part 42 is attached to the electronic control unit 1 by engagement, thus improving work efficiency. In other words, the drip-proof sheet 40 can be attached to the electronic control unit 1 more easily than a configuration that attaches to the electronic control unit 1 using only double-sided tape. Furthermore, the drip-proof sheet 40 can be prevented from peeling off when being attached to the electronic control unit 1.

[0058] The drip-proof sheet 40 seals the debug connector 16 with its positioning portion 42, thereby suppressing water exposure to the debug connector 16. Furthermore, the drip-proof sheet 40 can block the water entry route from the debug connector 16 into the housing space. Additionally, the drip-proof sheet 40, with its bent portion 45 and extended portion 46, can also suppress water exposure to the debug connector 16.

[0059] Furthermore, the electronic control unit 100 is equipped with a drip-proof sheet 40. Therefore, the electronic control unit 100 can suppress water exposure to the external connection connector 13.

[0060] (Variation 1) As shown in Figure 5, the external connector 13 is connected to the mating connector 200. Terminal 13t is electrically connected to the wire 210 when the mating connector 200 is connected to the external connector 13. In this case, the mating connector 200 is electrically connected to the in-vehicle equipment via the wire 210.

[0061] In the modified example 1, the drip-proof sheet 40 has a drip-proof portion 43 that extends to a position where it contacts the mating connector 200. The drip-proof sheet 40 has a Young's modulus that allows the drip-proof portion 43 to bend when installed. It can also be said that the drip-proof sheet 40 has a bending rigidity that allows the drip-proof portion 43 to bend when installed. In other words, the drip-proof portion 43 bends in the Z direction so as to reach the external connection connector 13 and the mating connector 200. It can also be said that the drip-proof portion 43 hangs down so as to reach the external connection connector 13 and the mating connector 200.

[0062] Furthermore, the drip-proof sheet 40 may have different bending rigidities in different parts. For example, the opposing portion 44 and the extended portion 46 of the drip-proof sheet 40 may have greater bending rigidity than the drip-proof portion 43 and the bent portion 45.

[0063] The drip-proof sheet 40 can achieve the same effects as in the above embodiment. Furthermore, the drip-proof sheet 40 can also suppress water ingress at the connection point between the external connection connector 13 and the mating connector 200. Therefore, the drip-proof sheet 40 can also suppress water ingress into the mating connector 200. The electronic control unit 100 may also be equipped with the drip-proof sheet 40 of Modification 1. The drip-proof part 43 of Modification 1 can also be applied to other embodiments and modifications.

[0064] (Modification 2) As shown in Figure 6, the drip-proof sheet 40 of Modification 2 has a drip-proof portion 43 that extends to a position where it contacts the wire 210 of the mating connector 200. The drip-proof sheet 40 can achieve the same effect as Modification 1. Furthermore, the drip-proof sheet 40 can also suppress the ingress of water between the mating connector 200 and the wire 210. The electronic control unit 100 may also be equipped with the drip-proof sheet 40 of Modification 2. The drip-proof portion 43 of Modification 2 can also be applied to other embodiments and modifications.

[0065] (Variation 3) As shown in Figure 7, the wiring board 14 may have an external connection connector 18 mounted on it. In other words, the electronic control unit 1 is equipped with an external connection connector 18 in addition to the configuration of the first embodiment. The external connection connector 18 is exposed from the side wall portion 21, similar to the external connection connector 13. The position of the external connection connector 18 in the Z direction is different from that of the external connection connector 13.

[0066] The drip-proof sheet 40 is provided protruding from the side wall portion 21 as described above. Therefore, the drip-proof sheet 40 can also suppress water exposure to the external connection connector. The electronic control device 1 of Modification 3 can also be applied to other embodiments and modifications.

[0067] (Second Embodiment) The electronic control unit 100 of the second embodiment will be described with reference to Figure 8. The electronic control unit 100 is equipped with a drip-proof sheet 40a instead of a drip-proof sheet 40. Note that the wiring board 14 does not necessarily need to have the debug connector 16 mounted on it.

[0068] As shown in Figure 8, the drip-proof sheet 40a differs from the drip-proof sheet 40 in the configuration of the positioning portion 42a. The positioning portion 42a has a first engaging portion 421, an intermediate portion 422, and a second engaging portion 423. The first engaging portion 421 is the part that engages with the corner of the side wall portion 22 and the bottom wall portion 25. The first engaging portion 421 is provided in connection with the intermediate portion 422.

[0069] The intermediate portion 422 is the part facing the side wall portion 22. The intermediate portion 422 is provided in conjunction with the second engaging portion 423, in addition to the first engaging portion 421. The second engaging portion 423 is the part that engages with the corner of the side wall portion 22 and the cover 30. The drip-proof sheet 40a is provided such that the positioning portion 42a engages with the housings 20 and 30.

[0070] Thus, the positioning portion 42a can also be described as a clamping portion 421, 422, 423 that faces the side wall portion 22 and sandwiches the cover 30 and the bottom wall portion 25. For this reason, the positioning portion 42a is configured to be elastically deformable. Furthermore, the positioning portion 42a deforms to match the shape of the housings 20 and 30. The positioning portion 42a then engages with the housings 20 and 30 with a force that tries to return it to its original shape. It can also be said that the positioning portion 42a has a shape that conforms to the outer shape of the base 20 and the cover 30.

[0071] The drip-proof sheet 40a can achieve the same effect as the drip-proof sheet 40. Furthermore, the drip-proof sheet 40a can be attached even to the electronic control unit 1 which does not have a debug connector 16. The electronic control unit 100 can achieve the same effect as in the above embodiment.

[0072] (Third embodiment) The electronic control unit 100 of the third embodiment will be described with reference to Figures 9 and 10. The electronic control unit 100 is equipped with a drip-proof sheet 40b instead of a drip-proof sheet 40. Note that the wiring board 14 does not necessarily need to have the debug connector 16 mounted on it.

[0073] As shown in Figures 9 and 10, the drip-proof sheet 40b differs from the drip-proof sheet 40 in the configuration of the fixing portion 41b. The positioning portion 42b is configured in the same way as the positioning portion 42a. In the third embodiment, the positioning portion 42 can be used instead of the positioning portion 42b.

[0074] The fixing portion 41b is a portion that is bent relative to the drip-proof portion 43. The fixing portion 41b is a bent portion that is in contact with the side wall portion 21. The fixing portion 41b is also bent relative to the opposing portion 44. The drip-proof sheet 40b has a fixing portion 41b in the Y direction at a position that sandwiches the external connection connector 13. In other words, the drip-proof sheet 40b has two fixing portions 41b. Note that the drip-proof sheet 40b only needs to have at least one fixing portion 41b.

[0075] The fixing portion 41b is fixed to the electronic control device 1 with the positioning portion 42b engaged with the housings 20 and 30. The fixing portion 41b is fixed to the electronic control device 1 by sandwiching the housings 20 and 30 together with the positioning portion 42b. Preferably, the fixing portion 41b, the opposing portion 44, and the positioning portion 42b have bending rigidity such that they do not flex under their own weight.

[0076] The drip-proof sheet 40b can achieve the same effect as the drip-proof sheet 40. Furthermore, the drip-proof sheet 40b can be fixed to the electronic control unit 1 without using double-sided tape or adhesive. The electronic control unit 100 can achieve the same effect as the embodiment described above.

[0077] (Fourth embodiment) The electronic control unit 100 of the fourth embodiment will be described with reference to Figures 11 and 12. The drip-proof sheet 40b differs from that of the third embodiment in that it is provided with an opening 47.

[0078] As shown in Figures 11 and 12, the cover 30 is equipped with heat dissipation fins 31. The drip-proof sheet 40b is attached to the housings 20 and 30 equipped with the heat dissipation fins 31. The drip-proof sheet 40b is provided with an opening 47 in which the heat dissipation fins 31 are positioned.

[0079] This embodiment can achieve the same effects as the third embodiment. Furthermore, the drip-proof sheet 40b can be easily positioned relative to the electronic control unit 1 while ensuring heat dissipation for the electronic control unit 1. The opening 47 can also be applied to the drip-proof sheet 40 and the drip-proof sheet 40a.

[0080] Preferred embodiments of the present disclosure have been described above. The present disclosure is not limited to such embodiments or structures. The present disclosure encompasses a variety of modifications and variations within the scope of equivalents. In addition, while various combinations and forms are shown in the present disclosure, other combinations and forms that include only one, more, or fewer of these elements also fall within the scope and idea of ​​the present disclosure.

[0081] (Disclosure of technical ideas) This specification discloses several technical concepts described in several paragraphs listed below. Some paragraphs may be written in a polynomial form, where subsequent paragraphs optionally refer to preceding paragraphs. Furthermore, some paragraphs may be written in a polynomial form, where they refer to other polynomial forms. These paragraphs written in a polynomial form define several technical concepts.

[0082] (Technical thought 1) A drip-proof sheet (40, 40a, 40b) is attached to an electronic control device (1) which comprises a circuit board (10) on which a connector (13) is mounted on a wiring board (11), and a housing (20, 30) that houses the circuit board with the connector exposed, A fixing part (41, 41b) fixed to the electronic control device, The connector in the housing is provided to protrude from the exposed connector wall portion (21), and a drip-proof portion (43) is provided to suppress water exposure to the connector, A drip-proof sheet comprising: an attachment to the electronic control device by engagement, the fixing portion being fixed to the electronic control device, and positioning portions (42, 42a, 42b) for positioning the drip-proof portion so that it protrudes from the connector wall portion.

[0083] (Technical thought 2) The circuit board is equipped with a specific connector (16) that is not connected to the mating connector (200) and is therefore available during the normal operation of the electronic control device. The drip-proof sheet according to technical concept 1, wherein the positioning portion is attached to the specific connector and is a sealing member (42) that seals the specific connector.

[0084] (Technical Thought 3) The sealing member is a rubber stopper, as described in Technical Concept 2, for the drip-proof sheet.

[0085] (Technical Thought 4) The housing has an opposing wall portion (22) facing the connector wall portion, a bottom wall portion (25) connected to the connector wall portion and the opposing wall portion, and an upper wall portion (30) facing the bottom wall portion. The drip-proof sheet according to technical concept 1, wherein the positioning portion is a clamping portion (421-423) that faces the opposing wall portion and sandwiches the upper wall portion and the bottom wall portion.

[0086] (Technical Thought 5) The fixing portion is a drip-proof sheet according to any one of the technical ideas 1 to 4, which is an adhesive member (41).

[0087] (Technical Thought 6) The fixing portion is a portion bent relative to the drip-proof portion and is a bent portion (41b) that contacts the connector wall portion, as described in any one of technical ideas 1 to 4.

[0088] (Technical Thought 7) A drip-proof sheet according to any one of technical ideas 1 to 5, which is attached to the housing equipped with heat dissipation fins, and which is provided with an opening (47) in which the heat dissipation fins are arranged.

[0089] (Technical Thought 8) An electronic control device (1) comprising a circuit board (10) on which a connector (13) is mounted on a wiring board (11), and a housing (20, 30) that houses the circuit board with the connector exposed, An electronic control unit comprising a drip-proof sheet (40, 40a, 40b) attached to the electronic control device, The housing has a connector wall portion (21) in which the connector is exposed. The aforementioned drip-proof sheet is A fixing part (41, 41b) fixed to the electronic control device, A drip-proof portion (43) is provided protruding from the connector wall portion (21) to suppress water exposure to the connector, An electronic control unit comprising: a fixing portion (42, 42a, 42b) for positioning the drip-proof portion so that it protrudes from the connector wall, while the fixing portion is fixed to the electronic control unit. [Explanation of symbols]

[0090] 10...Circuit board, 11...Wiring board, 12...Circuit element, 13...External connection connector, 13t...Terminal, 14...Wiring board, 15...Circuit element, 16...Debug connector, 16t...Terminal, 17...Board-to-board connector, 20...Base, 21~24...Side wall section, 25...Bottom wall section, 30...Cover, 40,40a,40b...Drip-proof sheet, 41...Fixing section, 42...Positioning section, 43...Drip-proof section, 44...Opposite section, 45...Bent section, 46...Extended section, 1...Electronic control device, 100...Electronic control unit

Claims

1. A drip-proof sheet (40, 40a, 40b) is attached to an electronic control device (1) which comprises a circuit board (10) on which a connector (13) is mounted on a wiring board (11), and a housing (20, 30) that houses the circuit board with the connector exposed, A fixing part (41, 41b) fixed to the electronic control device, The connector in the housing is provided to protrude from the exposed connector wall portion (21), and a drip-proof portion (43) is provided to suppress water exposure to the connector, A drip-proof sheet comprising: an attachment to the electronic control device by engagement, the fixing portion being fixed to the electronic control device, and positioning portions (42, 42a, 42b) for positioning the drip-proof portion so that it protrudes from the connector wall portion.

2. The circuit board is equipped with a specific connector (16) that is not connected to the mating connector (200) and is therefore in an empty state during the normal operation of the electronic control device. The drip-proof sheet according to claim 1, wherein the positioning portion is attached to the specific connector and is a sealing member (42) that seals the specific connector.

3. The drip-proof sheet according to claim 2, wherein the sealing member is a rubber stopper.

4. The housing has an opposing wall portion (22) facing the connector wall portion, a bottom wall portion (25) connected to the connector wall portion and the opposing wall portion, and an upper wall portion (30) facing the bottom wall portion. The drip-proof sheet according to claim 1, wherein the positioning portion is a clamping portion (421-423) that faces the opposing wall portion and sandwiches the upper wall portion and the bottom wall portion.

5. The drip-proof sheet according to any one of claims 1 to 4, wherein the fixing portion is an adhesive member (41).

6. The drip-proof sheet according to any one of claims 1 to 4, wherein the fixing portion is a portion bent relative to the drip-proof portion and is a bent portion (41b) that contacts the connector wall portion.

7. A drip-proof sheet according to claim 6, which is attached to the housing equipped with heat dissipation fins, and which is provided with an opening (47) in which the heat dissipation fins are arranged.

8. An electronic control device (1) comprising a circuit board (10) on which a connector (13) is mounted on a wiring board (11), and a housing (20, 30) that houses the circuit board with the connector exposed, An electronic control unit comprising a drip-proof sheet (40, 40a, 40b) attached to the electronic control device, The housing has a connector wall portion (21) in which the connector is exposed. The aforementioned drip-proof sheet is A fixing part (41, 41b) fixed to the electronic control device, A drip-proof portion (43) is provided protruding from the connector wall portion (21) to suppress water exposure to the connector, An electronic control unit comprising: a fixing portion (42, 42a, 42b) for positioning the drip-proof portion so that it protrudes from the connector wall, while the fixing portion is fixed to the electronic control unit.

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