Electrical equipment

Abstract

To provide an electric apparatus which can detect that liquid intrudes.SOLUTION: An electric apparatus mounted on a vehicle comprises: a housing in which a housing chamber is provided; a substrate which includes first wiring connected to the ground and second wiring configured to apply voltage and is arranged in the housing chamber; a conductive part which includes a first terminal provided in the first wiring, a second terminal provided in the second wiring, a first electronic component, first solder joining the first terminal and the first electronic component, and second solder joining the second terminal and the first electronic component; and a detection unit which includes an input terminal that is electrically connected to one of the first wiring and the second wiring, and outputs a detection signal when the voltage applied to the input terminal deviates from a prescribed range. At least one of the first solder and the second solder is located on the lower side relative to the detection unit.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] FIELD OF THE INVENTION Embodiments of the present invention relate to electrical devices. [Background technology]

[0002] Conventionally, there has been known an electric device that can prevent liquid from penetrating into the housing. For example, when liquid adheres to the top of the housing, the liquid is discharged through grooves provided between the components that make up the housing (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-061401 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-described conventional configuration can prevent liquid from entering the housing from the outside. However, some electrical devices are known that have a flow path or other portion inside the housing where liquid may exist. In such cases, there is a possibility that liquid may leak inside the housing. For example, if it is possible to detect liquid entering a chamber inside the housing where electrical components or the like are located, the electrical device can be prevented from being affected by the liquid.

[0005] SUMMARY OF THE INVENTION The present invention has been made in view of the above, and provides an electrical device capable of detecting the intrusion of liquid. [Means for solving the problem]

[0006] The electric device mounted on the vehicle according to the embodiment of the present invention may be, for example: A motor and a pump Containment Cell , a through hole, a flow path for hydraulic oil, and a pump mounting hole in which at least a part of the pump is accommodated.a first wiring connected to ground, and a second wiring configured to receive a voltage, the electronic component comprising: a substrate disposed in the accommodation chamber; a first terminal provided on the first wiring, a second terminal provided on the second wiring, a first electronic component, a first solder joining the first terminal and the first electronic component, and a second solder joining the second terminal and the first electronic component; and a detection unit having an input terminal electrically connected to one of the first wiring and the second wiring, and outputting a detection signal when a voltage applied to the input terminal deviates from a predetermined range, the motor is attached to a first mounting surface side which is one surface of the housing, the pump mounting hole opens to the first mounting surface, the through hole opens to the first mounting surface and a second mounting surface opposite the first mounting surface, the accommodating chamber is provided on the second mounting surface side and further has an upper space, a first lower space recessed downward from the upper space, and a second lower space recessed downward from the upper space and separated from the first lower space in the horizontal direction, the substrate further has a first portion disposed in the first lower space and a second portion disposed in the second lower space, the first lower space communicates with the through hole or is located below the through hole, the first solder and the second solder are provided in the first portion and are located below any other solders provided in the first portion, At least one of the first solder and the second solder is located below the detection unit. Therefore, for example, when liquid enters the storage chamber and corrodes at least one of the first solder and the second solder, the electrical connection between the first wiring and the second wiring by the conductive unit is broken. This causes a change in the voltage applied to the input terminal, and when this change causes the voltage applied to the input terminal to deviate from a predetermined range, the detection unit outputs a detection signal. In other words, the electrical device can detect the entry of liquid into the storage chamber using the detection unit. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a cross-sectional view that schematically shows a hydraulic pressure control device according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view schematically showing the hydraulic pressure control device of the first embodiment taken along line F2-F2 in FIG. [Figure 3] FIG. 3 is a flowchart illustrating an example of processing by the ECU according to the first embodiment. [Figure 4] FIG. 4 is a cross-sectional view that schematically shows a hydraulic pressure control device according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] (First embodiment) A first embodiment will be described below with reference to FIGS. 1 to 3. In this specification, the vertically upward direction is basically defined as the upward direction, and the vertically downward direction is basically defined as the downward direction. In addition, in this specification, components according to the embodiment and their descriptions may be described using multiple expressions. The components and their descriptions are merely examples and are not limited by the expressions in this specification. The components may also be identified by names different from those in this specification. The components may also be described using expressions different from those in this specification.

[0009] FIG. 1 is a cross-sectional view that schematically shows a hydraulic pressure control device 10 according to a first embodiment. The hydraulic pressure control device 10 is an example of an electrical device. The hydraulic pressure control device 10 is mounted on a vehicle 1 such as an automobile. The hydraulic pressure control device 10 adjusts the pressure (hydraulic pressure) in a hydraulic line of a brake device of the vehicle 1. However, the hydraulic pressure control device 10 is not limited to this example.

[0010] As shown in the drawings, for convenience, an X-axis, a Y-axis, and a Z-axis are defined in this specification. The X-axis, the Y-axis, and the Z-axis are perpendicular to one another. The X-axis is aligned along the width of the hydraulic control device 10. The Y-axis is aligned along the thickness of the hydraulic control device 10. The Z-axis is aligned along the height of the hydraulic control device 10.

[0011] Furthermore, in this specification, the X direction, Y direction, and Z direction are defined. The X direction is a direction along the X axis, and includes the +X direction indicated by the X axis arrow and the -X direction opposite to the X axis arrow. The Y direction is a direction along the Y axis, and includes the +Y direction indicated by the Y axis arrow and the -Y direction opposite to the Y axis arrow. The Z direction is a direction along the Z axis, and includes the +Z direction (upward) indicated by the Z axis arrow and the -Z direction (downward) opposite to the Z axis arrow.

[0012] The hydraulic control device 10 includes a housing 11, a pump 12, a motor 13, and an electronic control unit (ECU) 14. The motor 13 is an example of an actuator. The housing 11 includes a housing block 21 and a cover 22.

[0013] The housing block 21 is a substantially rectangular parallelepiped block made of, for example, metal or synthetic resin. However, the housing block 21 is not limited to this example. The pump 12, motor 13, and ECU 14 are attached to the housing block 21. Furthermore, various components such as a solenoid actuator are attached to the housing block 21.

[0014] The housing block 21 has a first mounting surface 21a and a second mounting surface 21b. The first mounting surface 21a and the second mounting surface 21b are outer surfaces of the housing block 21. The first mounting surface 21a is formed to be substantially flat and faces the +Y direction. The second mounting surface 21b is located on the opposite side of the first mounting surface 21a. The second mounting surface 21b is formed to be substantially flat and faces the -Y direction.

[0015] The housing block 21 is provided with a pump mounting hole 25, a flow path 26, and a through-hole 27. Other holes and grooves may also be provided in the housing block 21. Furthermore, the housing block 21 may be provided with various flow paths, not limited to the illustrated flow path 26.

[0016] The pump mounting hole 25 is a recess recessed from the first mounting surface 21a in approximately the -Y direction. The pump mounting hole 25 opens to the first mounting surface 21a at approximately the center of the first mounting surface 21a. The pump mounting hole 25 is connected to a hydraulic path of the brake device through a flow path 26.

[0017] The through-hole 27 penetrates the housing block 21 substantially in the Y direction. Therefore, the through-hole 27 is open at the first mounting surface 21a and the second mounting surface 21b. The through-hole 27 is spaced apart from the pump mounting hole 25 in the -Z direction, for example. Therefore, the through-hole 27 is located lower than the pump mounting hole 25. Note that the through-hole 27 may also be spaced apart from the pump mounting hole 25 in another direction. The through-hole 27 communicates with the pump mounting hole 25, for example, via a groove provided in the first mounting surface 21a.

[0018] The cover 22 is attached to the second mounting surface 21b. A storage chamber 28 is provided between the cover 22 and the second mounting surface 21b. The storage chamber 28 is a space provided inside the housing 11. The storage chamber 28 communicates with the through-hole 27. The space between the cover 22 and the second mounting surface 21b is liquid-tightly sealed by, for example, a sealant.

[0019] The pump 12 is, for example, a gear pump. However, the pump 12 may be another type of pump. At least a portion of the pump 12 is housed in the pump mounting hole 25. The pump 12 can send hydraulic oil (brake fluid) to the fluid passages of the brake device.

[0020] The hydraulic oil is, for example, an oil containing at least one of glycoethers, ethylene glycol monomethyl ether, polyglycols, diethylene glycol, and a rust inhibitor, but is not limited to this example.

[0021] The pump 12 sends hydraulic oil to the hydraulic passage of the brake device through the flow passage 26. Therefore, the hydraulic oil flows through the flow passage 26. The hydraulic oil is an example of a liquid. However, the liquid may be other liquids such as engine oil.

[0022] The motor 13 is, for example, a three-phase brushless motor. However, the motor 13 may be another type of motor. The motor 13 has a casing 31, a motor shaft 32, and motor terminals 33. Furthermore, the motor 13 has various parts such as bearings, a rotor, and a stator.

[0023] The casing 31 is attached to the first mounting surface 21a of the housing block 21. Therefore, the first mounting surface 21a faces the motor 13. The casing 31 covers the pump mounting hole 25 and the through-hole 27. The gap between the casing 31 and the first mounting surface 21a is liquid-tightly sealed, for example, by a sealant that surrounds the pump mounting hole 25 and the through-hole 27.

[0024] The motor shaft 32 is the output shaft of the motor 13. The motor shaft 32 is rotatably supported about a central axis Ax, for example, by a bearing. The central axis Ax is the center of rotation of the motor shaft 32. The pump mounting hole 25 is located on the central axis Ax.

[0025] The motor terminal 33 protrudes in the -Y direction from the casing 31. The motor terminal 33 includes, for example, an electrode connected to the stator and a cover that covers the electrode. The motor terminal 33 passes through the through-hole 27 and extends beyond the second mounting surface 21b.

[0026] FIG. 2 is a cross-sectional view schematically showing the hydraulic pressure control device 10 of the first embodiment taken along line F2-F2 in FIG. 1. FIG. 2 schematically shows the circuit in the ECU 14. As shown in FIG. 2, the ECU 14 has a substrate 41, a power supply unit 42, a circuit breaker 43, a drive unit 44, an integrated IC 45, a microcomputer 46, a first conductive unit 51, and a second conductive unit 52. The integrated IC 45 is an example of a detection unit. The first conductive unit 51 and the second conductive unit 52 are examples of conductive units.

[0027] The substrate 41 is, for example, a printed circuit board (PCB). However, the substrate 41 may be another type of substrate. The substrate 41 is disposed in the accommodation chamber 28. The substrate 41 is disposed along the XZ plane and is attached to the housing block 21 by, for example, screws. However, the substrate 41 may also be attached to the cover 22.

[0028] The power supply unit 42, the circuit breaker 43, the drive unit 44, the integrated IC 45, the microcomputer 46, the first conduction unit 51, and the second conduction unit 52 are each part of a circuit provided in the ECU 14. The power supply unit 42, the circuit breaker 43, the drive unit 44, the integrated IC 45, the microcomputer 46, the first conduction unit 51, and the second conduction unit 52 may each be, for example, a circuit provided on the substrate 41, an IC mounted on the substrate 41, or a part formed by the circuit provided on the substrate 41 and the IC mounted on the substrate 41 in cooperation with each other.

[0029] The substrate 41 is provided with a ground 60 and a plurality of wirings 61, 62, 63, 64, 65, 66, and 67. The wiring 64 is an example of a third wiring. The ground 60 and the wirings 61, 62, 63, 64, 65, 66, and 67 are formed, for example, by conductors provided on the substrate 41. Note that the ground 60 and the wirings 61, 62, 63, 64, 65, 66, and 67 may include other components or portions.

[0030] The ground 60 is, for example, a ground plane and is set to ground potential. The wiring 61 is connected to the power supply unit 42, the cutoff unit 43, the integrated IC 45, and the first conductive unit 51. The wiring 62 is connected to the integrated IC 45, the first conductive unit 51, and the second conductive unit 52.

[0031] Wiring 63 is connected to the integrated IC 45, the second conductive unit 52, and ground 60. Wiring 64 is connected to the circuit breaker 43 and the drive unit 44. Wiring 65 is connected to the integrated IC 45 and the microcomputer 46. Wiring 66 is connected to the circuit breaker 43 and the microcomputer 46. Wiring 67 is connected to the microcomputer 46 and, for example, an external terminal of the hydraulic control device 10.

[0032] Wiring 61 and wiring 62 are connected to each other by a first conductive portion 51. The first conductive portion 51 has lands (pads) 71 and 72, a resistor 73, and solders 74 and 75. The land 71 is an example of a first terminal. The land 72 is an example of a second terminal. The resistor 73 is an example of a first electronic component. The solder 74 is an example of a first solder. The solder 75 is an example of a second solder.

[0033] Land 71 is provided at one end of wiring 62. Land 72 is provided at one end of wiring 61. Land 71 and land 72 are provided spaced apart from each other on substrate 41. Note that the first terminal and second terminal are not limited to lands 71 ​​and 72, and may be other terminals such as through holes.

[0034] Solder 74 joins land 71 to one terminal of resistor 73. Solder 75 joins land 72 to the other terminal of resistor 73. As a result, first conductive portion 51 electrically connects wire 61 and wire 62.

[0035] The wiring 62 and the wiring 63 are connected to each other by the second conductive portion 52. The second conductive portion 52 has lands (pads) 81, 82, a resistor 83, and solders 84, 85. The land 81 is an example of a first terminal. The land 82 is an example of a second terminal. The resistor 83 is an example of a first electronic component. The solder 84 is an example of a first solder. The solder 85 is an example of a second solder.

[0036] The land 81 is provided at one end of the wiring 63. The land 82 is provided at one end of the wiring 62. The lands 81 and 82 are provided spaced apart from each other on the substrate 41. Note that the first terminal and the second terminal are not limited to the lands 81 and 82, and may be other terminals such as through holes.

[0037] Solder 84 joins land 81 to one terminal of resistor 83. Solder 85 joins land 82 to the other terminal of resistor 83. As a result, second conductive portion 52 electrically connects wire 62 and wire 63.

[0038] Power supply unit 42 is provided on substrate 41 and is electrically connected to, for example, a battery of vehicle 1. Power supply unit 42 applies, for example, the voltage of the battery to wiring 61. Note that power supply unit 42 may apply a voltage different from the voltage of the battery to wiring 61.

[0039] The interrupter 43 is, for example, a relay. The interrupter 43 is provided between the wiring 61 and the wiring 64. In other words, the wiring 64 is electrically connected to the wiring 61 via the interrupter 43. The interrupter 43 can be switched between a state in which the wiring 61 and the wiring 64 are electrically connected to each other and a state in which the electrical connection between the wiring 61 and the wiring 64 is interrupted.

[0040] The driving unit 44 is, for example, a driver for the motor 13. The driving unit 44 is connected to the motor terminal 33 of the motor 13 via, for example, a connector. The connector is mounted on the substrate 41 by, for example, press-fitting. The motor terminal 33 may also be directly connected to the substrate 41. The driving unit 44 outputs a driving signal to the motor 13 to drive the motor 13.

[0041] The integrated IC 45 is mounted on the substrate 41. The integrated IC 45 has three monitor terminals 45a, 45b and an output terminal 45c. The monitor terminal 45b is an example of an input terminal. The integrated IC 45 may have various other terminals.

[0042] The monitor terminal 45a is connected to the wiring 61. The integrated IC 45 determines whether a predetermined voltage is applied to the wiring 61 based on the voltage applied to the monitor terminal 45a. For example, if the voltage applied to the wiring 61 deviates from a predetermined range, the integrated IC 45 outputs a signal to the microcomputer 46. The monitor terminal 45b is connected to the wiring 62. The output terminal 45c is connected to the wiring 65.

[0043] The microcomputer 46 is mounted on the substrate 41. The microcomputer 46 can control the cutoff unit 43 through a wiring 66. The microcomputer 46 can also control, for example, a lamp of the vehicle 1 through a wiring 67.

[0044] The ECU 14 further includes an electronic component 91 and solder 92. The electronic component 91 is an example of a second electronic component. The solder 92 is an example of a third solder. The electronic component 91 is a resistor or another electronic component. The solder 92 joins a terminal of the electronic component 91 to a land on the substrate 41.

[0045] The substrate 41 of the ECU 14 has a surface 101 and an edge 102. The surface 101 is, for example, a substantially flat outer surface of the substrate 41 facing the +Y direction or the −Y direction. For example, the lands 71, 72, 81, and 82 are provided on the surface 101. The edge 102 is an edge of the substrate 41 and faces in a direction substantially perpendicular to the Y direction.

[0046] In this embodiment, the substrate 41 is formed in a substantially rectangular plate shape. Therefore, the edge 102 has an upper edge 102a, a lower edge 102b, and two side edges 102c and 102d. The upper edge 102a extends substantially in the X direction and faces substantially in the +Z direction. The lower edge 102b is spaced from the upper edge 102a in the -Z direction. The lower edge 102b extends substantially in the X direction and faces substantially in the -Z direction. The side edges 102c and 102d connect both ends of the upper edge 102a and the lower edge 102b.

[0047] A notch 105 is provided in the substrate 41. The notch 105 is a recess recessed from the lower edge 102b in the +Z direction. In other words, the notch 105 opens to the lower edge 102b. The notch 105 is spaced apart from the two side edges 102c, 102d. Therefore, the lower edge 102b is divided into two by the notch 105.

[0048] In this embodiment, the cover 22 has a peripheral wall 111 and a protrusion 112. The peripheral wall 111 is formed in a substantially rectangular cylindrical shape extending in the Y direction. The accommodation chamber 28 is provided inside the peripheral wall 111. In other words, the peripheral wall 111 surrounds the substrate 41 placed in the accommodation chamber 28. Note that the housing block 21 may have the peripheral wall 111.

[0049] The peripheral wall 111 has an upper wall 111a, a lower wall 111b, and two side walls 111c and 111d. The upper wall 111a extends substantially in the X direction along the upper edge 102a of the substrate 41. The lower wall 111b is spaced from the upper wall 111a in the -Z direction. The lower wall 111b extends substantially in the X direction along the lower edge 102b. The side walls 111c and 111d connect both ends of the upper wall 111a and the lower wall 111b.

[0050] The protrusion 112 protrudes upward from the lower wall 111b. In other words, the protrusion 112 protrudes from the lower wall 111b toward the inside of the accommodation chamber 28. The protrusion 112 is provided over the entire area of ​​the accommodation chamber 28 in the Y direction. A sealant provides a liquid-tight seal between the protrusion 112 and the second mounting surface 21b. At least a portion of the protrusion 112 is housed in the notch 105 of the substrate 41.

[0051] A hole 113 is provided in the protrusion 112. The hole 113 penetrates the protrusion 112 in the Y direction. For example, a screw 114 passes through the hole 113 to attach the cover 22 to the housing block 21.

[0052] By protruding portion 112 from bottom wall 111b, storage chamber 28 is divided into upper space 120, first lower space 121, and second lower space 122. In other words, storage chamber 28 has upper space 120, first lower space 121, and second lower space 122. In Fig. 2, upper space 120, first lower space 121, and second lower space 122 are schematically divided by two-dot chain lines.

[0053] The upper space 120 is a portion of the storage chamber 28 located above the end 112a in the upward direction (+Z direction) of the protrusion 112. The first lower space 121 and the second lower space 122 are portions of the storage chamber 28 located below the end 112a in the upward direction of the protrusion 112.

[0054] The respective ends of the first lower space 121 and the second lower space 122 in the upward direction are connected to the upper space 120. In other words, the first lower space 121 and the second lower space 122 are spaces recessed downward from the upper space 120.

[0055] The first lower space 121 and the second lower space 122 are separated from each other in the horizontal direction by the protrusion 112. In other words, the first lower space 121 and the second lower space 122 are separated from each other in the horizontal direction via the protrusion 112.

[0056] The substrate 41 has an upper portion 130, a first lower portion 131, and a second lower portion 132. The first lower portion 131 is an example of a first portion. The second lower portion 132 is an example of a second portion.

[0057] The upper portion 130 is a portion of the substrate 41 that is arranged in the upper space 120 of the storage chamber 28. The first lower portion 131 is a portion of the substrate 41 that is arranged in the first lower space 121 of the storage chamber 28. The second lower portion 132 is a portion of the substrate 41 that is arranged in the second lower space 122 of the storage chamber 28.

[0058] The respective ends of the first lower portion 131 and the second lower portion 132 in the upward direction are connected to the upper portion 130. The first lower portion 131 and the second lower portion 132 are separated in the horizontal direction by the notch 105 and the protrusion 112. In other words, the first lower portion 131 and the second lower portion 132 are spaced apart from each other in the horizontal direction via the notch 105 and the protrusion 112.

[0059] At least a portion of the power supply unit 42, the circuit breaker 43, the driver 44, the integrated IC 45, and the microcomputer 46 are provided in the upper portion 130. Meanwhile, the first conductive unit 51, the second conductive unit 52, and at least a portion of the electronic component 91 are provided in the first lower portion 131. Therefore, the solders 74, 75, 84, 85, and 92 are provided in the first lower portion 131.

[0060] The first conductive portion 51 and the second conductive portion 52 are located below the circuit breaker 43, the driver 44, the integrated IC 45, and the microcomputer 46. Therefore, the solders 74, 75, 84, and 85 are located below the circuit breaker 43, the driver 44, the integrated IC 45, and the microcomputer 46. Note that one of the solders 74 and 75 and one of the solders 84 and 85 may be located above the circuit breaker 43, the driver 44, the integrated IC 45, and the microcomputer 46. Furthermore, the solders 74, 75, 84, and 85 may be located at the same height as the driver 44.

[0061] The solders 74, 75, 84, and 85 are located at the same height as the solder 92. The solders 74, 75, 84, and 85 may be located higher than the solder 92. The volume of each of the solders 74, 75, 84, and 85 is smaller than the volume of the solder 92.

[0062] The motor terminal 33 is at least partially connected to the first lower portion 131. The motor terminal 33 may be connected to the upper portion 130 directly above the first lower portion 131. Therefore, an end of the through hole 27 of the housing block 21 opens toward at least one of the first lower portion 131 and a part of the upper portion 130 directly above the first lower portion 131. In addition, the first lower space 121 communicates with the through hole 27 or is located below the through hole 27.

[0063] In the hydraulic control device 10 described above, hydraulic oil may leak from the pump 12. The hydraulic oil moves downward due to gravity. The space between the housing block 21 and the casing 31 is sealed. Therefore, the hydraulic oil in the pump mounting hole 25 is discharged to the through-hole 27.

[0064] The space between the inner surface of the through-hole 27 and the motor terminal 33 may be sealed with, for example, a sealant. There is a possibility that the hydraulic oil may penetrate through the through-hole 27 into the accommodation chamber 28, for example, by passing over the sealant.

[0065] The hydraulic oil that has entered the accommodation chamber 28 moves downward due to gravity. As a result, the hydraulic oil accumulates in the first lower space 121. The protrusion 112 restricts the hydraulic oil in the first lower space 121 from moving to the second lower space 122.

[0066] When the level of hydraulic oil stored in the first lower space 121 rises, the hydraulic oil adheres to the solders 74, 75, 84, and 85. The hydraulic oil corrodes (dissolves) the solders 74, 75, 84, and 85. The hydraulic control device 10 can detect that hydraulic oil has entered the accommodation chamber 28 based on the corrosion of at least one of the solders 74, 75, 84, and 85. This will be explained in detail below.

[0067] First, a case where at least one of the solders 74, 75 corrodes will be described. The ground-side wiring 140 is provided on the substrate 41. The ground-side wiring 140 has a second conductive portion 52 and wirings 62 and 63. Therefore, the ground-side wiring 140 is connected to the ground 70 and is electrically connected to the monitor terminal 45b.

[0068] In the following description, the ground-side wiring 140 is an example of a first wiring, and the wiring 61 is an example of a second wiring. In the first conductive portion 51, the land 71 is provided on the ground-side wiring 140. The land 72 is provided on the wiring 61.

[0069] Battery voltage is applied to the wiring 61 by the power supply unit 42. Therefore, for example, a positive voltage is applied to both the solders 74 and 75 in the first conductive portion 51. Application of a common positive and negative voltage promotes corrosion of the solders 74 and 75 by the hydraulic oil.

[0070] The first conductive portion 51 electrically connects the wiring 61 and the ground-side wiring 140. However, when at least one of the solders 74 and 75 corrodes, the electrical connection between the wiring 61 and the ground-side wiring 140 provided by the first conductive portion 51 is cut off (disconnected). When the first conductive portion 51 is disconnected, the voltage applied to the monitor terminal 45b of the integrated IC 45 drops to almost zero.

[0071] The integrated IC 45 determines whether the voltage applied to the monitor terminal 45b exceeds a predetermined threshold (first threshold). The first threshold is, for example, a value between zero and the voltage (initial voltage) applied to the monitor terminal 45b when the first conductive portion 51 conducts the wiring 61 and the ground-side wiring 140. That is, when a disconnection occurs in the first conductive portion 51, the voltage applied to the monitor terminal 45b drops below the first threshold. In other words, the voltage applied to the monitor terminal 45b deviates from a predetermined range (first range) equal to or greater than the first threshold. In this case, the lower limit of the first range is the first threshold, and there is no upper limit to the first range. Note that an upper limit to the first range may be set.

[0072] When the integrated IC 45 determines that the voltage applied to the monitor terminal 45b has deviated from the first range, it outputs a detection signal to the microcomputer 46 via the wiring 65. Upon receiving the detection signal, the microcomputer 46 outputs a control signal to the cutoff unit 43 via the wiring 66. The cutoff unit 43 cuts off the electrical connection between the wiring 61 and the wiring 64 based on the control signal. That is, when the integrated IC 45 outputs a detection signal, the cutoff unit 43 cuts off the electrical connection between the wiring 61 and the wiring 64 based on the detection signal. This makes it possible to prevent, for example, the wiring 64 from being short-circuited by hydraulic oil.

[0073] Furthermore, when the integrated IC 45 determines that the voltage applied to the monitor terminal 45b deviates from the first range, it outputs a control signal to a lamp of the vehicle 1 through the wiring 67. The lamp lights up or flashes based on the control signal. That is, when the integrated IC 45 outputs a detection signal, the lamp of the vehicle 1 lights up or flashes based on the detection signal. This allows, for example, the driver (user) to recognize that hydraulic oil has entered the accommodation chamber 28.

[0074] The integrated IC 45 may output a control signal to, for example, a horn or a communication device through the wiring 67. For example, the driver can be made aware that hydraulic oil has leaked into the storage compartment 28 by the sound of the horn. The communication device can also notify a device such as a control center or a smartphone that hydraulic oil has leaked into the storage compartment 28.

[0075] Next, a case where at least one of the solders 84, 85 corrodes will be described. The power supply side wiring 150 is provided on the substrate 41. The power supply side wiring 150 has a first conductive portion 51 and wirings 61, 62. Therefore, a voltage is applied to the power supply side wiring 150, and the power supply side wiring 150 is electrically connected to the monitor terminal 45b.

[0076] In the following description, the wiring 63 is an example of a first wiring, and the power supply side wiring 150 is an example of a second wiring. In the second conductive portion 52, the land 81 is provided on the wiring 63. The land 82 is provided on the power supply side wiring 150. The wiring 64 is electrically connected to the power supply side wiring 150 through the interrupter portion 43.

[0077] The second conductive portion 52 electrically connects the wiring 63 to the power supply wiring 150. However, corrosion of at least one of the solders 84 and 85 causes a disconnection between the wiring 63 and the power supply wiring 150 by the second conductive portion 52. When a disconnection occurs in the second conductive portion 52, the voltage applied to the monitor terminal 45b of the integrated IC 45 increases.

[0078] The integrated IC 45 determines whether the voltage applied to the monitor terminal 45b exceeds a predetermined threshold (second threshold). The second threshold is, for example, higher than the voltage (initial voltage) applied to the monitor terminal 45b when the second conductive portion 52 conducts the wiring 63 and the power supply side wiring 150. That is, when a disconnection occurs in the second conductive portion 52, the voltage applied to the monitor terminal 45b increases beyond the second threshold. In other words, the voltage applied to the monitor terminal 45b deviates from a predetermined range (second range) equal to or less than the second threshold. In this case, the upper limit of the second range is the second threshold, and there is no lower limit of the second range. The second threshold is higher than the first threshold. Note that a lower limit of the second range may also be set.

[0079] When the integrated IC 45 determines that the voltage applied to the monitor terminal 45b deviates from the second range, it outputs a determination signal to the microcomputer 46 through the wiring 65. Upon receiving the determination signal, the microcomputer 46 outputs a control signal to the cutoff unit 43 and a lamp of the vehicle 1.

[0080] 3 is a flowchart showing an example of processing by the ECU 14 according to the first embodiment. As described above, the ECU 14 determines whether the voltage applied to the monitor terminal 45b is lower than the first threshold value by the integrated IC 45 (S1). In other words, the ECU 14 determines whether the voltage applied to the monitor terminal 45b is outside the first range.

[0081] If the voltage applied to the monitor terminal 45b is not below the first threshold (S1: No), the ECU 14 determines, via the integrated IC 45, whether the voltage applied to the monitor terminal 45b exceeds the second threshold (S2). In other words, the ECU 14 determines whether the voltage applied to the monitor terminal 45b is outside the second range. In S1 and S2, the ECU 14 determines whether the voltage applied to the monitor terminal 45b is outside a predetermined range (set range) that is equal to or greater than the first threshold and equal to or less than the second threshold. If the voltage applied to the monitor terminal 45b is not above the second threshold (S2: No), the process returns to S1.

[0082] On the other hand, if the voltage applied to monitor terminal 45b is lower than the first threshold value in S1 (S1: Yes), or if the voltage applied to monitor terminal 45b is higher than the second threshold value in S2 (S2: Yes), the voltage applied to monitor terminal 45b deviates from the set range. If the voltage applied to monitor terminal 45b deviates from the set range, microcomputer 46 causes breaker 43 to break the electrical connection between wire 61 and wire 64 (S3). Furthermore, microcomputer 46 outputs a control signal to a lamp of vehicle 1 (S4). The first range, second range, and set range in the above description are each an example of a predetermined range.

[0083] As described above, the hydraulic control device 10 can detect that hydraulic oil has entered the accommodation chamber 28 based on corrosion of at least one of the solders 74, 75, 84, and 85. However, the detection of the entry of hydraulic oil into the accommodation chamber 28 by the hydraulic control device 10 is not limited to the above example.

[0084] In the above example, the hydraulic oil accumulated in the first lower space 121 corrodes the solders 74, 75, 84, and 85. However, the hydraulic oil moving downward due to gravity, for example, may come into contact with the solders 74, 75, 84, and 85, thereby corroding the solders 74, 75, 84, and 85.

[0085] In the hydraulic pressure control device 10 according to the first embodiment described above, the substrate 41 disposed in the accommodation chamber 28 of the housing 11 includes a ground wiring 140 and a wiring 61. The ground wiring 140 is connected to the ground 60. A voltage is applied to the wiring 61. The first conductive portion 51 includes lands 71 ​​and 72, a resistor 73, and solder pieces 74 and 75. The land 71 is provided on the ground wiring 140. The land 72 is provided on the wiring 61. The solder piece 74 connects the land 71 to the resistor 73. The solder piece 75 connects the land 72 to the resistor 73. Therefore, the first conductive portion 51 electrically connects the ground wiring 140 and the wiring 61. The integrated IC 45 includes a monitor terminal 45b. The monitor terminal 45b is electrically connected to the ground wiring 140. At least one of the solders 74, 75 is located below the integrated IC 45. For example, a liquid (hydraulic oil) that corrodes at least one of the solders 74, 75 may infiltrate the accommodation chamber 28. The liquid that accumulates in the accommodation chamber 28 contacts at least one of the solders 74, 75 before contacting the integrated IC 45. If the liquid corrodes at least one of the solders 74, 75, the electrical connection between the ground-side wiring 140 and the wiring 61 via the first conductive part 51 is broken, causing a change in the voltage applied to the monitor terminal 45b. If this change causes the voltage applied to the monitor terminal 45b to deviate from a predetermined range, the integrated IC 45 outputs a detection signal. In other words, the hydraulic control device 10 of this embodiment can detect the intrusion of liquid into the accommodation chamber 28 using the integrated IC 45. Furthermore, the hydraulic control device 10 can detect the intrusion of liquid before the liquid accumulated in the accommodation chamber 28 contacts the integrated IC 45, thereby preventing malfunctions of the integrated IC 45.

[0086] The wiring 64 is electrically connected to the wiring 61. The interrupting unit 43 can interrupt the electrical connection between the wiring 61 and the wiring 64. The interrupting unit 43 interrupts the electrical connection between the wiring 61 and the wiring 64 based on a detection signal output by the integrated IC 45. At least one of the solders 74, 75 is located below the interrupting unit 43. This allows the hydraulic control device 10 of this embodiment to detect the intrusion of liquid accumulated in the accommodation chamber 28 before the liquid comes into contact with the interrupting unit 43, thereby preventing malfunction of the interrupting unit 43. In other words, the hydraulic control device 10 can more reliably interrupt the supply of power to the component (motor 13) connected to the wiring 64 when liquid intrudes into the accommodation chamber 28.

[0087] The drive unit 44 is connected to the wiring 64 and configured to drive the motor 13. At least one of the solders 74, 75 is located below the drive unit 44 or at the same height as the drive unit 44. This allows the hydraulic control device 10 to more reliably cut off the power supply to the drive unit 44 and the motor 13 when liquid enters the accommodation chamber 28.

[0088] The solder 92 connects the electronic component 91 and the substrate 41. The solders 74 and 75 are each located above the solder 92 or at the same height as the solder 92. The volume of each of the solders 74 and 75 is smaller than the volume of the solder 92. As a result, when the liquid accumulated in the accommodation chamber 28 comes into contact with the solders 74, 75, and 92, the solders 74 and 75 corrode before the solder 92 corrodes. Therefore, the hydraulic pressure control device 10 can detect that the liquid has entered the accommodation chamber 28 before the solder 92 corrodes.

[0089] A flow path 26 is provided in the housing 11. A liquid (hydraulic oil) that corrodes at least one of the solders 74, 75 flows through the flow path 26. The liquid in the flow path 26 may leak into the accommodation chamber 28. In this case, the hydraulic control device 10 detects that the liquid has entered the accommodation chamber 28 using the integrated IC 45, as described above. That is, the hydraulic control device 10 of this embodiment can detect that the liquid in the flow path 26 has leaked into the accommodation chamber 28 using the integrated IC 45.

[0090] (Second embodiment) The second embodiment will be described below with reference to Fig. 4. In the following description of the embodiment, components having the same functions as components already described are given the same reference numerals as the components already described, and further description may be omitted. Furthermore, multiple components given the same reference numerals do not necessarily have all the same functions and properties, and may have different functions and properties according to each embodiment.

[0091] Fig. 4 is a cross-sectional view that schematically shows a hydraulic pressure control device 10 according to a second embodiment. As shown in Fig. 4, in the second embodiment, solders 74, 75, 84, and 85 are located below solder 92. Furthermore, solders 74, 75, 84, and 85 are located below any other solders provided in the first lower portion 131. Note that solders other than solders 74, 75, 84, and 85 do not necessarily have to be provided in the first lower portion 131.

[0092] In the hydraulic control device 10 of the second embodiment described above, the accommodation chamber 28 has an upper space 120, a first lower space 121, and a second lower space 122. The first lower space 121 and the second lower space 122 are each recessed downward from the upper space 120. The second lower space 122 is separated from the first lower space 121 in the horizontal direction. The substrate 41 has a first lower portion 131 disposed in the first lower space 121 and a second lower portion 132 disposed in the second lower space 122. The solders 74 and 75 are provided in the first lower portion 131 and are located lower than any other solders provided in the first lower portion 131. This allows the hydraulic control device 10 to detect the intrusion of liquid into the first lower space 121 before the liquid corrodes other solders provided in the first lower portion 131. Furthermore, in the hydraulic control device 10, the second lower space 122 is separated from the first lower space 121 in the horizontal direction, so that liquid that has entered the first lower space 121 can be prevented from entering the second lower space 122. Therefore, in the hydraulic control device 10, for example, solder can be provided below the solders 74, 75 in the second lower portion 132, and the degree of freedom in arranging the solder in the second lower portion 132 can be improved.

[0093] In the embodiments described above, the resistors 73 and 83 are examples of the first electronic component. However, the first electronic component may be any of various other electronic components or may simply be a conductor.

[0094] In the embodiment described above, the integrated IC 45 is an example of a detector, and the monitor terminal 45b is an example of an input terminal. However, the microcomputer 46 may be an example of a detector. In this case, the microcomputer 46 has an input terminal.

[0095] As an example, the electrical device mounted on a vehicle according to at least one of the embodiments described above includes a housing having an accommodation chamber provided therein, a first wiring connected to ground, and a second wiring configured to receive a voltage, and includes a substrate arranged in the accommodation chamber, a first terminal provided on the first wiring, a second terminal provided on the second wiring, a first electronic component, a first solder joining the first terminal and the first electronic component, and a second solder joining the second terminal and the first electronic component, and a detection unit having an input terminal electrically connected to one of the first wiring and the second wiring and outputting a detection signal when the voltage applied to the input terminal deviates from a predetermined range, and at least one of the first solder and the second solder is located below the detection unit. Therefore, as an example, when liquid penetrates into the storage chamber and corrodes at least one of the first solder and the second solder, the electrical connection between the first wiring and the second wiring by the conductive portion is broken. This causes a change in the voltage applied to the input terminal, and when this change causes the voltage applied to the input terminal to deviate from a predetermined range, the detection portion outputs a detection signal. In other words, the electric device can detect the penetration of liquid into the storage chamber using the detection portion. Furthermore, the electric device can detect the penetration of liquid before the liquid accumulated in the storage chamber comes into contact with the detection portion, thereby suppressing malfunction of the detection portion.

[0096] As an example, the electric device further includes a third wiring electrically connected to the second wiring and a breaker capable of breaking the electrical connection between the second wiring and the third wiring, the breaker configured to break the electrical connection between the second wiring and the third wiring based on the detection signal, and at least one of the first solder and the second solder located below the breaker. Thus, as an example, the electric device can detect the intrusion of liquid accumulated in the accommodating chamber before the liquid contacts the breaker, thereby preventing malfunction of the breaker. In other words, the electric device can more reliably cut off the power supply to the component connected to the third wiring when liquid intrudes into the accommodating chamber.

[0097] As an example, the electric device further includes an actuator and a drive unit connected to the third wiring and configured to drive the actuator, and at least one of the first solder and the second solder is located below the drive unit or at the same height as the drive unit. Thus, as an example, the electric device can more reliably cut off the power supply to the drive unit and the actuator when liquid enters the accommodation chamber.

[0098] For example, the electric device further includes a second electronic component and a third solder that connects the second electronic component to the substrate, wherein the first solder and the second solder are each located above the third solder or at the same height as the third solder, and the volumes of the first solder and the second solder are each smaller than the volume of the third solder. Therefore, for example, when liquid accumulated in the chamber comes into contact with the first solder, the second solder, and the third solder, the first solder and the second solder corrode before the third solder corrodes. Therefore, the electric device can detect the intrusion of liquid into the chamber before the third solder corrodes.

[0099] In the above-described electric device, for example, the accommodation chamber includes an upper space, a first lower space recessed downward from the upper space, and a second lower space recessed downward from the upper space and separated horizontally from the first lower space, the substrate includes a first portion disposed in the first lower space and a second portion disposed in the second lower space, and the first solder and the second solder are provided in the first portion and positioned lower than any other solder provided in the first portion. Thus, for example, the electric device can detect the intrusion of liquid into the first lower space before the liquid corrodes the other solders provided in the first portion. Furthermore, because the second lower space is separated horizontally from the first lower space, the electric device can prevent liquid that has infiltrated the first lower space from infiltrating the second lower space. Therefore, in the electric device, for example, the solder can be provided below the first solder and the second solder in the second portion, and the degree of freedom in arranging the solder in the second portion can be improved.

[0100] In the above electric device, as one example, the housing is provided with a flow path through which a liquid that corrodes at least one of the first solder and the second solder flows. Therefore, as one example, the electric device detects, as described above, that the liquid has entered the accommodating chamber using a detection unit. That is, the electric device can detect, by the detection unit, that the liquid in the flow path has leaked into the accommodating chamber.

[0101] In the above description, suppression is defined as, for example, preventing an event, action, or influence from occurring, or reducing the degree of an event, action, or influence. Also, in the above description, restriction is defined as, for example, preventing movement or rotation, or allowing movement or rotation within a predetermined range and preventing movement or rotation beyond the predetermined range.

[0102] While the embodiments of the present invention have been described above, the above-described embodiments and modifications are merely examples and are not intended to limit the scope of the invention. The above-described embodiments and modifications can be implemented in various other forms, and various omissions, substitutions, combinations, and modifications can be made without departing from the spirit of the invention. Furthermore, the configurations and shapes of each embodiment and each modification can be partially interchanged. [Explanation of symbols]

[0103] 10...hydraulic pressure control device (electrical device), 11...housing, 13...motor (actuator), 26...flow path, 28...accommodation chamber, 41...substrate, 43...interrupter, 44...driver, 45...integrated IC (detector), 45b...monitor terminal (input terminal), 51...first conductive portion (conductive portion), 52...second conductive portion (conductive portion), 60...ground, 61...wiring (second wiring), 63...wiring (first wiring), 64...wiring (third wiring), 71,81...land (first terminal), 72,8 2...land (second terminal), 73, 83...resistor (first electronic component), 74, 84...solder (first solder), 75, 85...solder (second solder), 91...electronic component (second electronic component), 92...solder (third solder), 120...upper space, 121...first lower space, 122...second lower space, 131...first lower part (first part), 132...second lower part (second part), 140...ground side wiring (first wiring), 150...power supply side wiring (second wiring).

Claims

1. A motor, A pump and a housing having an accommodation chamber, a through hole, a flow path for hydraulic oil, and a pump mounting hole for accommodating at least a portion of the pump; a substrate disposed in the accommodation chamber, the substrate having a first wiring connected to ground and a second wiring configured to be applied with a voltage; a conductive portion including a first terminal provided on the first wiring, a second terminal provided on the second wiring, a first electronic component, a first solder that joins the first terminal and the first electronic component, and a second solder that joins the second terminal and the first electronic component; a detection unit having an input terminal electrically connected to one of the first wiring and the second wiring, and outputting a detection signal when a voltage applied to the input terminal deviates from a predetermined range; Equipped with the motor is attached to a first mounting surface side, which is one surface of the housing; the pump mounting hole opens to the first mounting surface; the through hole is open at the first mounting surface and at a second mounting surface opposite the first mounting surface, the storage chamber is provided on the second mounting surface side and further includes an upper space, a first lower space recessed downward from the upper space, and a second lower space recessed downward from the upper space and separated from the first lower space in the horizontal direction, the substrate further has a first portion disposed in the first lower space and a second portion disposed in the second lower space, the first lower space is in communication with the through hole or is located below the through hole, the first solder and the second solder are provided in the first portion and are located below any other solder provided in the first portion; At least one of the first solder and the second solder is located below the detection portion. Electrical equipment installed in a vehicle.

2. a third wiring electrically connected to the second wiring; a cutoff unit capable of cutting off an electrical connection between the second wiring and the third wiring; Further comprising: the interrupting unit is configured to interrupt the electrical connection between the second wiring and the third wiring based on the detection signal; At least one of the first solder and the second solder is located below the interrupting portion.

10. The electrical device of claim 1.

3. A drive unit connected to the third wiring and configured to drive the motor; Further comprising: At least one of the first solder and the second solder is located below the driving unit or at the same height as the driving unit.

3. The electrical device of claim 2.

4. a second electronic component; a third solder that joins the second electronic component and the substrate; Further comprising: each of the first solder and the second solder is located above the third solder or at the same height as the third solder; a volume of each of the first solder and the second solder is smaller than a volume of the third solder; 4. An electrical device according to any one of claims 1 to 3.

5. The first electronic component is a resistor.

5. An electrical device according to any one of claims 1 to 4.

Images