Electronic equipment

Abstract

To prevent water droplets, which is infiltrated from a clearance of an electronic apparatus, from being deposited onto a circuit board.SOLUTION: An electronic apparatus comprises: a housing at least including a bottom face, and a first rising wall part, a second rising wall part, a third rising wall part and a fourth rising wall part, which are disposed around the bottom face; a circuit board on which an electronic component is mounted and which is stored in the housing; and a lid part which is disposed correspondingly to at least a portion of a first apex of the first rising wall part, a second apex of the second rising wall part, a third apex of the third rising wall part and a fourth apex of the fourth rising wall part, covers the circuit board and includes an inner surface opposed to the bottom face and an outer surface at an opposite side of the inner surface. The cover part includes a contact portion which is provided in a part of the inner surface and in contact with the circuit board, and the lid part includes a continuous protrusion, which is continued with a predetermined length along the inner surface and protrudes toward the bottom face. When the electronic apparatus is disposed with the first rising wall part down, at least one long side of the continuous protrusion of the inner surface is disposed so as to be higher than the contact portion and cover the contact portion.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to electronic devices. [Background technology]

[0002] A vehicle is equipped with an electronic control unit (ECU (Electronic Control Unit)). If water droplets adhere to the circuit board of the ECU, there is a concern that the operation of the ECU may be hindered. Patent Document 1 discloses a housing for accommodating an ECU, which is configured such that, when water droplets drip onto the upper surface of the housing away from the opening, and when the water droplets attempt to move on the upper surface toward the connector arrangement surface due to vibration of the vehicle while traveling, or when the water droplets attempt to move on the upper surface toward the connector arrangement surface when the vehicle accelerates, the water droplets are guided by step portions to both sides of the opening on the upper surface, then guided downward along the left and right side surfaces of the housing, and drip from a location on the lower surface of the housing away from the opening. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-161624 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, although the configuration disclosed in Patent Document 1 can prevent water droplets from entering through the openings and attempting to move toward the connector arrangement surface, it cannot prevent water droplets that have entered through gaps in the housing from adhering to the circuit board.

[0005] An object of the present disclosure is to provide a technique for preventing water droplets that have entered through gaps in an electronic device from adhering to a circuit board. [Means for solving the problem]

[0006] The electronic device according to the present disclosure is an electronic device comprising: a housing having at least a bottom surface, a first upright wall portion, a second upright wall portion, a third upright wall portion, and a fourth upright wall portion arranged around the bottom surface; a circuit board on which electronic components are mounted and housed in the housing; and a lid portion arranged to correspond to at least a portion of a first apex of the first upright wall portion, a second apex of the second upright wall portion, a third apex of the third upright wall portion, and a fourth apex of the fourth upright wall portion, covering the circuit board, the lid portion having an inner surface facing the bottom surface, and an outer surface opposite to the inner surface, wherein the lid portion has a contact portion provided on a portion of the inner surface and contacts the circuit board, the lid portion has a continuous protrusion portion that is continuous along the inner surface for a predetermined length and protrudes toward the bottom surface, and when the electronic device is placed with the first upright wall portion facing down, at least one long side of the continuous protrusion portion on the inner surface is above the contact portion and is arranged to cover the contact portion. Effect of the Invention

[0007] According to the present disclosure, it is possible to prevent water droplets that have entered through gaps in an electronic device from adhering to a circuit board. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an example in which an electronic device according to an embodiment is mounted on a vehicle; [Diagram 2] FIG. 1 is a perspective view showing an example of an electronic device according to an embodiment of the present invention, as viewed from the housing side; [Diagram 3] FIG. 1 is a perspective view showing an example of an electronic device according to an embodiment of the present invention, viewed from the circuit board side with a housing removed; [Figure 4] FIG. 1 is a perspective view showing an example of an electronic device according to an embodiment of the present invention, as viewed from a lid side; [Diagram 5] FIG. 1 is a perspective view showing an example of an inner surface of a lid portion when a first standing wall portion according to the present embodiment is placed at the bottom; [Figure 6] FIG. 13 is a perspective view showing an example of an inner surface of a lid portion when a third standing wall portion according to the present embodiment is placed at the bottom; [Figure 7] FIG. 13 is a perspective view showing an example of an inner surface of the lid portion when the fourth standing wall portion according to the present embodiment is placed at the bottom. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed description of already well-known matters and duplicated description of substantially the same configuration may be omitted. This is to avoid the following description becoming unnecessarily redundant and to facilitate understanding by those skilled in the art. Note that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0010] (Present embodiment) <Vehicle configuration> FIG. 1 is a diagram showing an example in which an electronic device 10 according to the present embodiment is mounted on a vehicle.

[0011] A vehicle is equipped with various electronic devices, such as an ECU. For example, the electronic devices may be installed outside the vehicle cabin, such as in the engine compartment, or may be installed inside the vehicle cabin, such as in an instrument panel 2 or a console box, as shown in FIG.

[0012] Electronic devices mounted outside the vehicle cabin have a completely waterproof structure, but electronic devices mounted inside the vehicle cabin generally do not have a completely waterproof structure in order to reduce the number of parts or costs. However, even inside the vehicle cabin, water droplets may be generated, for example, when the windshield is washed with water from the inside, drinking water is accidentally spilled, or condensation occurs in the air conditioner duct. If such water droplets reach the circuit board in the electronic device mounted inside the vehicle cabin, there is a concern that the operation of the electronic device may be impaired.

[0013] Therefore, in this embodiment, a structure of electronic device 10 that prevents water droplets generated and dripping inside a vehicle cabin from reaching a circuit board inside the electronic device (i.e., has a drip-proof performance) will be described. However, the application of the structure of electronic device 10 according to this embodiment is not limited to electronic devices mounted on vehicles. For example, the structure of electronic device 10 according to this embodiment can also be applied to electronic devices 10 mounted on railroad cars, airplanes, agricultural machinery, construction machinery, personal computers, printers, smartphones, etc.

[0014] <Electronic device structure> FIG. 2 is a perspective view showing an example of the electronic device 10 seen from the housing 20 side according to the present embodiment. FIG. 3 is a perspective view showing an example of the electronic device 10 seen from the circuit board 31 side with the housing 20 removed according to the present embodiment. FIG. 4 is a perspective view showing an example of the electronic device 10 seen from the lid portion 60 side according to the present embodiment. FIG. 5 is a perspective view showing an example of the inner surface 61 of the lid portion 60 with the first standing wall portion 22A according to the present embodiment facing down. FIG. 6 is a perspective view showing an example of the inner surface 61 of the lid portion 60 with the third standing wall portion 22C according to the present embodiment facing down. FIG. 7 is a perspective view showing an example of the inner surface 61 of the lid portion 60 with the fourth standing wall portion 22D according to the present embodiment facing down.

[0015] For ease of explanation, as shown in Fig. 2 to Fig. 7, the axis extending from the first standing wall portion 22A to the third standing wall portion 22C is defined as the X-axis. The axis extending from the fourth standing wall portion 22D to the second standing wall portion 22B and perpendicular to the X-axis is defined as the Y-axis. The axis extending from the lid portion 60 to the bottom surface 21 of the housing 20 and perpendicular to the X-axis and Y-axis is defined as the Z-axis. Note that the definitions of these axes are used for ease of explanation and are not intended to limit the orientation of the structure during actual use.

[0016] The electronic device 10 includes a housing 20, a circuit board 31, and a cover 60. The electronic device 10 may have a substantially rectangular parallelepiped shape, as shown in Figs. 2 and 4.

[0017] The housing 20 includes at least a bottom surface 21 and a first standing wall portion 22A, a second standing wall portion 22B, a third standing wall portion 22C, and a fourth standing wall portion 22D arranged around the bottom surface 21. The bottom surface 21 may have a substantially rectangular shape. The first standing wall portion 22A, the second standing wall portion 22B, the third standing wall portion 22C, and the fourth standing wall portion 22D may be wall surfaces located on the four sides of the bottom surface 21, respectively, and extending perpendicularly to the bottom surface 21 and toward the lid portion 60 (i.e., in the Z-axis direction). In this embodiment, the first standing wall portion 22A and the third standing wall portion 22C are arranged opposite each other, and the second standing wall portion 22B and the fourth standing wall portion 22D are arranged opposite each other.

[0018] 3, electronic components 32 are mounted on a circuit board 31, and the circuit board 31 is housed in a housing 20. Examples of the electronic components 32 include an LSI (Large Scale Integrated Circuit), a CPU (Central Processing Unit), a controller, a memory, and the like.

[0019] As shown in FIG. 3, a connector 33 for connecting the circuit board 31 to an external device, a power source, or the like may be disposed on the side of the circuit board 31 facing the fourth standing wall portion 22D.

[0020] The lid portion 60 is disposed so as to correspond to at least a part of the first apex 23A of the first standing wall portion 22A, the second apex 23B of the second standing wall portion 22B, the second apex 23B of the third standing wall portion 22C, and the fourth apex 23D of the fourth standing wall portion 22D, and covers the circuit board 31. For example, the lid portion 60 may have a rectangular shape. The first apex 23A, the second apex 23B, the third apex 23C, and the fourth apex 23D may be the apex end surfaces of the first standing wall portion 22A, the second standing wall portion 22B, the third standing wall portion 22C, and the fourth standing wall portion 22D, respectively, or may include the side surfaces near the apex end surfaces without being limited to the apex end surfaces. The lid portion 60 may also be disposed slightly away from at least a part of the first apex 23A, the second apex 23B, the third apex 23C, and the fourth apex 23D.

[0021] For example, as shown in FIG. 3, the circuit board 31 is arranged along the bottom surface 21 of the housing 20 and is accommodated within a space formed by the bottom surface 21 of the housing 20, the first standing wall portion 22A, the second standing wall portion 22B, the third standing wall portion 22C and the fourth standing wall portion 22D, and the lid portion 60.

[0022] The lid portion 60 has an inner surface 61 facing the bottom surface 21 of the housing 20, and an outer surface 62 opposite the inner surface 61. The lid portion 60 has a contact portion 63 provided on a part of the inner surface 61, which contacts the circuit board 31.

[0023] The lid portion 60 has a protrusion 64 corresponding to the contact portion 63. The protrusion 64 may protrude toward the bottom surface 21 of the housing 20. The lid portion 60 and the circuit board 31 are fastened to each other at the contact portion 63, for example, by screws 81. By providing the protrusion 64, a predetermined gap is formed between the circuit board 31 and the inner surface 61 of the lid portion 60. The lid portion 60, the circuit board 31, and the housing 20 may be fastened to each other at the four corners, for example, by screws 82.

[0024] The lid portion 60 has a continuous protruding portion 70 that continues along the inner surface 61 for a predetermined length and protrudes toward the bottom surface 21. As described above, a gap is formed between the circuit board 31 and the inner surface 61 of the lid portion 60, and the continuous protruding portion 70 protrudes so as not to come into contact with the circuit board 31.

[0025] The lid 60 may be made of metal (e.g., sheet metal or aluminum die-cast). The protrusion 64 and the continuous protrusion 70 may be formed by pressing the metal lid 60. This makes it possible to easily form the continuous protrusion 70 in any shape.

[0026] <<When the electronic device 10 is placed with the first standing wall portion 22A facing down>> As shown in FIG. 5, when the electronic device 10 is placed inside the vehicle cabin with the first vertical wall portion 22A facing down, the first long side 72A, which is at least one long side 71 of the continuous protrusion portion 70 on the inner surface 61 of the cover portion 60, is positioned above the contact portion 63 and so as to cover the contact portion 63.

[0027] Furthermore, a second long side 72B, which is at least one long side 71 of the continuous protrusion 70, may be disposed along the first long side 72A. For example, as shown in Fig. 5, the second long side 72B is disposed along the first long side 72A at a position lower than the first long side 72A and higher than the contact portion 63. As shown in Fig. 5, the first long side 72A and / or the second long side 72B may be disposed at an angle.

[0028] As a result, for example, as shown in FIG. 5, when the electronic device 10 is placed with the first standing wall portion 22A facing down, the first long side 72A and the second long side 72B are disposed above the contact portion 63, covering the contact portion 63, and inclined. The inclination angles of the first long side 72A and the second long side 72B may be the same (not shown) or different (see FIG. 5). For example, as shown in FIG. 5, the inclination angle of the second long side 72B may be larger than the inclination angle of the first long side 72A. In addition, the first long side 72A and / or the second long side 72B may be inclined linearly (see FIG. 5) or curvedly (not shown). In addition, when the second long side 72B is located below the first long side 72A, the second long side 72B may be longer than the first long side 72A.

[0029] Although FIG. 5 shows an example in which the lid portion 60 has two long sides 71, the first long side 72A and the second long side 72B, the number of long sides 71 may be one, or three or more.

[0030] Next, the function and effect of the first long side 72A and the second long side 72B in the case where the electronic device 10 is placed with the first standing wall portion 22A facing down as shown in FIG. 5 will be described.

[0031] For example, if water droplets enter through the third gap 91C, which is the gap between the third standing wall portion 22C and the lid portion 60, the water droplets move downward along the inner surface 61 of the lid portion 60. However, the water droplets hit the first long side 72A and move along the inclination of the first long side 72A (see water droplet path 101A). Even if part of the water droplet that hits the first long side 72A moves downward without following the inclination of the first long side 72A, the water droplets hit the second long side 72B and move along the inclination of the second long side 72B (see water droplet path 101B).

[0032] 5, by providing the first long side 72A and the second long side 72B on the inner surface 61 of the cover 60, it is possible to prevent water droplets that have entered through the third gap 91C from reaching the contact portion 63. In other words, it is possible to prevent water droplets that have entered through the third gap 91C from reaching the circuit board 31 via the contact portion 63.

[0033] <<When the electronic device 10 is placed with the third standing wall portion 22C facing down>> As shown in Figure 6, when the electronic device 10 is placed inside the vehicle cabin with the third standing wall portion 22C facing down, the third long side 72C, which is at least one long side 71 of the continuous protrusion portion 70 on the inner surface 61 of the cover portion 60, is positioned above the contact portion 63 and covers the contact portion 63.

[0034] Furthermore, a fourth long side 72D, which is at least one long side 71 of the continuous protrusion 70, may be disposed along the third long side 72C. For example, as shown in Fig. 6, the fourth long side 72D is disposed along the third long side 72C at a position lower than the third long side 72C and higher than the contact portion 63. As shown in Fig. 6, the third long side 72C and / or the fourth long side 72D may be disposed at an angle.

[0035] As a result, for example, as shown in FIG. 6, when the electronic device 10 is placed with the third standing wall portion 22C facing down, the third long side 72C and the fourth long side 72D are disposed above the contact portion 63, covering the contact portion 63, and inclined. The inclination angles of the third long side 72C and the fourth long side 72D may be the same (not shown) or different (see FIG. 6). For example, as shown in FIG. 6, the inclination angle of the fourth long side 72D may be larger than the inclination angle of the third long side 72C. Also, the third long side 72C and / or the fourth long side 72D may be inclined linearly (see FIG. 6) or curvedly (not shown). Also, when the fourth long side 72D is located below the third long side 72C, the fourth long side 72D may be longer than the third long side 72C.

[0036] Although FIG. 6 shows an example in which the lid portion 60 has two long sides 71, the third long side 72C and the fourth long side 72D, the number of long sides 71 may be one, or three or more.

[0037] Next, the effects of the third long side 72C and the fourth long side 72D in the case where the electronic device 10 is placed with the third standing wall portion 22C facing down as shown in FIG. 6 will be described.

[0038] For example, if water droplets enter through the first gap 91A, which is the gap between the first standing wall portion 22A and the lid portion 60, the water droplets move downward along the inner surface 61 of the lid portion 60. However, the water droplets hit the third long side 72C and move along the slope of the third long side 72C (see water droplet path 102A). Even if part of the water droplet that hits the third long side 72C moves downward without following the slope of the third long side 72C, the water droplets hit the fourth long side 72D and move along the slope of the fourth long side 72D (see water droplet path 102B).

[0039] 6, by providing the third long side 72C and the fourth long side 72D on the inner surface 61 of the cover portion 60, it is possible to prevent water droplets that have entered through the first gap 91A from reaching the contact portion 63. In other words, it is possible to prevent water droplets that have entered through the third gap 91C from reaching the circuit board 31 via the contact portion 63.

[0040] <<When the electronic device 10 is placed with the fourth standing wall portion 22D facing down>> 7, when the electronic device 10 is placed in the vehicle cabin with the fourth standing wall portion 22D facing down, at least one long side 71 of the continuous protruding portion 70 of the inner surface 61 of the lid portion 60 may have a first inclined side 73A arranged diagonally in a first direction and a second inclined side 73B arranged diagonally in a second direction different from the first direction. The first inclined side 73A and the second inclined side 73B may be arranged continuously via a corner portion 74A. The first inclined side 73A and the second inclined side 73B may be inclined in a direction approaching the fourth standing wall portion 22D as they move away from the corner portion 74A.

[0041] For example, as shown in FIG. 7, when the electronic device 10 is placed with the fourth standing wall portion 22D facing down, the first inclined edge 73A and the second inclined edge 73B are positioned above the contact portion 63 and so as to cover the contact portion 63.

[0042] 7, at least one long side 71 of the continuous protrusion 70 may have a third inclined side 73C arranged diagonally in the third direction and a fourth inclined side 73D arranged diagonally in a fourth direction different from the third direction. The third inclined side 73C and the fourth inclined side 73D may be arranged continuously via a corner 74B. The third inclined side 73C and the fourth inclined side 73D may incline in a direction closer to the fourth standing wall portion 22D as they move away from the corner 74B.

[0043] 7, in the case where the electronic device 10 is placed with the fourth standing wall portion 22D facing down, the third inclined side 73C and the fourth inclined side 73D are disposed above the contact portion 63 so as to cover the contact portion 63. The third inclined side 73C and the fourth inclined side 73D may be disposed at a position below the first inclined side 73A and the second inclined side 73B and above the contact portion 63.

[0044] The inclination angles of the first inclined side 73A and the third inclined side 73C may be the same (not shown) or different (see FIG. 7). The inclination angle of the third inclined side 73C may be larger than the inclination angle of the first inclined side 73A.

[0045] The inclination angles of the second inclined side 73B and the fourth inclined side 73D may be the same (not shown) or different (see FIG. 7). The inclination angle of the fourth inclined side 73D may be larger than the inclination angle of the second inclined side 73B.

[0046] At least one of the first inclined side 73A, the second inclined side 73B, the third inclined side 73C, and the fourth inclined side 73D may be inclined directly (see FIG. 7) or may be inclined in a curved manner (not shown).

[0047] Note that Figure 7 shows an example in which the cover portion 60 has two long sides 71, namely, a set of a first inclined side 73A and a second inclined side 73B and a set of a third inclined side 73C and a fourth inclined side 73D, but the number of long sides 71 may be one, or three or more.

[0048] Next, the effects of the first inclined side 73A, the second inclined side 73B, the third inclined side 73C and the fourth inclined side 73D when the electronic device 10 is placed with the fourth standing wall portion 22D facing down as shown in FIG. 7 will be described.

[0049] For example, when water droplets enter through the second gap 91B between the second standing wall portion 22B and the lid portion 60, the water droplets move downward along the inner surface 61 of the lid portion 60. However, the water droplets hit the first inclined side 73A or the second inclined side 73B and move along the inclination of the first inclined side 73A or the second inclined side 73B (see water droplet path 103A). Even if a part of the water droplet that hits the first inclined side 73A or the second inclined side 73B moves downward not along the inclination of the first inclined side 73A or the second inclined side 73B, the water droplets hit the third inclined side 73C or the fourth inclined side 73D and move along the inclination of the third inclined side 73C or the fourth inclined side 73D (see water droplet path 103B).

[0050] 7, by providing the first inclined edge 73A and the second inclined edge 73B (as well as the third inclined edge 73C and the fourth inclined edge 73D), it is possible to prevent water droplets that have entered through the second gap 91B from reaching the contact portion 63. In other words, it is possible to prevent water droplets that have entered through the second gap 91B from reaching the circuit board 31 via the contact portion 63.

[0051] In addition, the first inclined edge 73A and the second inclined edge 73B (as well as the third inclined edge 73C and the fourth inclined edge 73D) shown in Figure 7 may be positioned above the contact portion 63 so as to cover the contact portion 63 when the electronic device 10 is placed with the first upright wall portion 22A (or the third upright wall portion 22C) facing down.

[0052] In addition, in this embodiment, an example has been shown in which the lid portion 60 is provided with the first long side 72A, the second long side 72B, the third long side 72C, the fourth long side 72D, the first inclined side 73A, the second inclined side 73B, the third inclined side 73C, and the fourth inclined side 73D as the continuous protrusion portion 70. However, if the orientation of the electronic device 10 in the vehicle cabin (i.e., which way down it is placed) is determined in advance, the continuous protrusion portion 70 may be provided only above the contact portion 63 of the lid portion 60.

[0053] As shown in FIGS. 4, 5, 6, and 7, the lid 60, the circuit board 31, and the housing 20 may be fastened by screws 82 at the four corners. The lid 60 may include a contact portion 83 that is provided on a part of the inner surface 61 around the screw 82 and contacts the circuit board 31, and a protrusion 84 that corresponds to the contact portion 83. The protrusion 84 may protrude toward the bottom surface 21 of the housing 20. In this case, similar to the continuous protrusion 70 described above, the lid 60 may have a continuous protrusion (not shown) that is arranged to prevent water droplets that have entered through a gap in the lid 60 from reaching the circuit board 31 via the protrusion 84 and the contact portion 83. For example, the continuous protrusion may be arranged to surround the contact portion 83 and the protrusion 84. As a result, similar to the continuous protrusion 70 described above, water droplets that have seeped in through the gaps in the cover portion 60 can be moved along the slope of the continuous protrusion, preventing the seeping water droplets from reaching the circuit board 31 via the protrusion portion 84 and the contact portion 83.

[0054] Summary of the Disclosure The above description of the embodiments discloses the following techniques.

[0055] <Technology 1> The electronic device 10 according to the present disclosure includes a housing 20, a circuit board 31, and a lid portion 60. The housing 20 includes at least a bottom surface 21 and a first standing wall portion 22A, a second standing wall portion 22B, a third standing wall portion 22C, and a fourth standing wall portion 22D arranged around the bottom surface 21. The circuit board 31 has an electronic component 32 mounted thereon and is housed in the housing 20. The lid portion 60 is arranged to correspond to at least a part of the first top portion 23A of the first standing wall portion 22A, the second top portion 23B of the second standing wall portion 22B, the third top portion 23C of the third standing wall portion 22C, and the fourth top portion 23D of the fourth standing wall portion 22D, covers the circuit board 31, and has an inner surface 61 facing the bottom surface 21 and an outer surface 62 opposite to the inner surface 61. The lid portion 60 has a contact portion 63 provided in a part of the inner surface 61 and in contact with the circuit board 31. The cover 60 has a continuous protruding portion 70 that is continuous along the inner surface 61 with a predetermined length and protrudes toward the bottom surface 21. When the electronic device 10 is placed with the first standing wall portion 22A facing down, at least one long side 71 of the continuous protruding portion 70 of the inner surface 61 is positioned above the contact portion 63 and so as to cover the contact portion 63. According to this configuration, when water droplets adhering to the inner surface 61 of the lid portion 60 move downward, the water droplets hit the continuous protrusion portion 70 and do not reach the contact portion 63, thereby preventing the water droplets from reaching the circuit board 31 through the contact portion 63.

[0056] <Technology 2> In the electronic device 10 described in Technique 1, the cover portion 60 and the circuit board 31 are fastened at the contact portion 63 .

[0057] <Technology 3> In the electronic device 10 according to the first or second aspect, the cover portion 60 includes a protrusion portion 64 corresponding to the contact portion 63.

[0058] <Technology 4> In the electronic device 10 according to any one of Techniques 1 to 3, the cover portion 60 and the circuit board 31 are fastened to each other at the contact portion 63 by a screw 81 .

[0059] <Technology 5> In the electronic device 10 described in any one of Technology 1 to Technology 4, when the electronic device 10 is placed with the first standing wall portion 22A facing down, at least one long side 71 of the continuous protrusion portion 70 of the inner surface 61 is above the contact portion 63, covers the contact portion 63, and is positioned at an angle.

[0060] <Technology 6> An electronic device 10 described in any one of Techniques 1 to 5, wherein the long side 71 of the continuous protrusion 70 on the inner surface 61 is a first long side 72A, and the continuous protrusion 70 on the inner surface 61 further has a second long side 72B along the first long side 72A.

[0061] <Technology 7> An electronic device 10 according to any one of Technology 1 to Technology 6, wherein when the electronic device 10 is placed with the first standing wall portion 22A facing down, at least one long side 71 of the continuous protrusion 70 of the inner surface 61 has a first inclined side 73A arranged diagonally in a first direction and a second inclined side 73B arranged diagonally in a second direction different from the first direction.

[0062] <Technology 8> In the electronic device 10 described in Technique 7, the first inclined side 73A and the second inclined side 73B are disposed continuously with the corner 74A interposed therebetween.

[0063] <Technology 9> In the electronic device 10 according to any one of Techniques 1 to 8, the cover 60 is made of metal.

[0064] <Technology 10> In the electronic device 10 according to Technique 9, the continuous protrusion 70 is formed on the metal cover 60 by press working.

[0065] Although the embodiments have been described above with reference to the accompanying drawings, the present disclosure is not limited to such examples. It is clear that a person skilled in the art can conceive of various modifications, corrections, substitutions, additions, deletions, and equivalents within the scope of the claims, and it is understood that these also belong to the technical scope of the present disclosure. In addition, the components in the above-mentioned embodiments may be arbitrarily combined within the scope of the invention. [Industrial Applicability]

[0066] The technology of the present disclosure is useful for electronic devices that require drip-proof performance. [Explanation of symbols]

[0067] 10 Electronic equipment 20. Cabinet 21 Bottom 22A 1st standing wall section 22B 2nd standing wall section 22C 3rd standing wall section 22D 4th standing wall section 23A 1st top 23B 2nd top 23C 3rd top 23D 4th top 31 Circuit Board 32 Electronic Components 33 Connector 60 Lid 61 Inside 62 Exterior 63 Contact part 64 Protrusion 70 Continuous protrusion 71 Long side 72A First long side 72B 2nd long side 72C Third long side 72D 4th long side 73A 1st slope side 73B 2nd slope side 73C 3rd slope side 73D 4th slope side 74A, 74B Corner 81, 82 Screws 83 Contact Part 84 Protrusion 101A Water droplet path 101B Water droplet path 102A Water droplet path 102B Water droplet path 103A Water droplet path 103B Water droplet path

Claims

1. a housing including at least a bottom surface and a first standing wall portion, a second standing wall portion, a third standing wall portion, and a fourth standing wall portion arranged around the bottom surface; a circuit board on which electronic components are mounted and which is accommodated in the housing; an electronic device comprising: a cover portion that is arranged to correspond to at least a part of a first apex of the first standing wall portion, a second apex of the second standing wall portion, a third apex of the third standing wall portion, and a fourth apex of the fourth standing wall portion, the cover portion covers the circuit board, and has an inner surface facing the bottom surface and an outer surface opposite to the inner surface, the cover portion has a contact portion provided on a part of the inner surface and adapted to come into contact with the circuit board, the lid portion has a continuous protruding portion that is continuous along the inner surface and has a predetermined length and protrudes toward the bottom surface, when the electronic device is placed with the first standing wall portion facing down, at least one long side of the continuous protrusion on the inner surface is located above the contact portion and is disposed so as to cover the contact portion, When the electronic device is placed with the first standing wall portion facing down, at least one long side of the continuous protrusion on the inner surface has a first inclined side obliquely disposed in a first direction and a second inclined side obliquely disposed in a second direction different from the first direction. electronic equipment.

2. 2. The electronic device according to claim 1, The cover and the circuit board are fastened at the contact portion. electronic equipment.

3. 3. The electronic device according to claim 2, The cover portion includes a protrusion corresponding to the contact portion. electronic equipment.

4. 4. The electronic device according to claim 3, The cover and the circuit board are fastened to each other by screws at the contact portions. electronic equipment.

5. 2. The electronic device according to claim 1, When the electronic device is placed with the first standing wall portion facing down, at least one of the long sides of the continuous protrusions on the inner surface is located above the contact portion, covers the contact portion, and is obliquely disposed. electronic equipment.

6. 2. The electronic device according to claim 1, the long side of the continuous protrusion on the inner surface is a first long side; The continuous projection on the inner surface further includes a second long side along the first long side. electronic equipment.

7. 2. The electronic device according to claim 1, The first inclined side and the second inclined side are continuously arranged via a corner portion. electronic equipment.

8. 2. The electronic device according to claim 1, The lid is made of metal. electronic equipment.

9. 9. The electronic device according to claim 8, The continuous protrusion is formed on the metal cover by press working. electronic equipment.

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