WO2013046261A1

WO2013046261A1 - Electronic apparatus

Info

Publication number: WO2013046261A1
Application number: PCT/JP2011/005458
Authority: WO
Inventors: 淳志桑原
Original assignee: 三菱電機株式会社
Priority date: 2011-09-28
Filing date: 2011-09-28
Publication date: 2013-04-04
Also published as: JP5546689B2; JPWO2013046261A1

Abstract

On an upper surface (C) of a housing (1), a recess (32) is provided, said recess guiding a liquid entered onto the upper surface (C) to the rear side of the upper surface (C) of the housing (1).

Description

Electronics

The present invention relates to electronic devices for in-vehicle use, marine use, aircraft use, and the like, and more particularly, to an electronic device having a structure that prevents water from entering inside.

Conventionally, in an electronic device such as an audio device or a navigation device, in order to dissipate heat generated inside the housing of the electronic device to the outside of the housing, a heat radiating hole is formed on the top surface, side surface, and back surface of the housing. Yes. For example, in an in-vehicle audio device or a navigation device, an air conditioner device may be disposed above, and water droplets from the air conditioner duct flow down to the upper surface of the audio device or the navigation device and enter the inside through a heat dissipation hole, It was a factor that caused problems. Further, if the heat dissipation hole is made small or covered in order to prevent water from entering the inside, the heat dissipation effect is reduced.

As a countermeasure, Patent Document 1 discloses an electronic device provided with water guiding means for guiding water discharged from the upper surface of the housing to the right or left side of the housing and discharging it.

JP 2010-56447 A

In the conventional technique represented by Patent Document 1, water that has entered the upper surface of the housing is guided to at least one of the left and right side surfaces of the housing. In addition, in an in-vehicle electronic device or the like attached to an instrument panel of a vehicle, the left and right side surfaces of the housing are often fixed to the instrument panel via a bracket. For this reason, as in Patent Document 1, when water is guided to the left and right side surfaces of the housing, the water accumulates between the side surfaces of the housing and the bracket, and may enter the inside through the heat dissipation holes provided in the housing. There was a problem.

In addition, in-vehicle electronic devices are often provided with connectors on the back of the casing due to the installation space, and the area for forming heat radiation holes is narrow. For this reason, it is desirable to discharge the water that has entered the upper surface from the rear of the housing.

The present invention has been made to solve the above-described problems, and an object thereof is to provide an electronic device that discharges liquid that has entered the upper surface of the casing of the electronic device from the rear of the upper surface of the casing.

The electronic apparatus according to the present invention includes a recess provided on the upper surface of the housing and guiding the liquid that has entered the upper surface to the rear of the upper surface of the housing.

According to this invention, the liquid that has entered the upper surface of the housing can be discharged from the rear of the upper surface of the housing.

1 is a perspective view showing a structure of an in-vehicle audio device according to Embodiment 1. FIG. It is a side view which shows the attachment to the vehicle of the vehicle-mounted audio apparatus by Embodiment 1. FIG. FIG. 3 is an explanatory diagram showing a drainage path of the in-vehicle audio device according to the first embodiment. FIG. 3 is a diagram showing a structure of a cover of the in-vehicle audio device according to Embodiment 1. FIG. 3 is a diagram showing a heat sink structure of the in-vehicle audio device according to the first embodiment. It is explanatory drawing which shows the other structure of the vehicle-mounted audio apparatus by Embodiment 1, and its drainage path. It is a figure which shows the structure of the vehicle-mounted audio apparatus by Embodiment 2, and its drainage path. FIG. 6 is a diagram showing a structure of a heat sink of an in-vehicle audio device according to a third embodiment. FIG. 10 is a diagram showing another structure of the heat sink of the in-vehicle audio device according to the third embodiment.

Hereinafter, in order to explain the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
In the following description, an in-vehicle audio device will be described as an example of the electronic device of the present invention. In addition, this invention is not limited to a vehicle-mounted audio apparatus, It can apply to another electronic device.
1 is a perspective view showing the structure of an in-vehicle audio device according to Embodiment 1. FIG. 1A is a perspective view of the in-vehicle audio device viewed from the front and right side, and FIG. 1B is a perspective view of the in-vehicle audio device viewed from the back and right side. FIG.1 (c) is a disassembled perspective view of the vehicle-mounted audio apparatus shown in FIG.1 (b).

As shown in FIG. 1, the in-vehicle audio device includes six surfaces including a front surface A, a back surface B, an upper surface C, a lower surface D, a right side surface E, and a left side surface F, and includes a housing 1 and a heat sink 23 described later. Yes.
The front surface A of the housing 1 is composed of a design surface 10, and is composed of an operation button 11 and an operation dial 12 for operating an audio device, a disk insertion slot 13 for inserting or unloading a disk, and the like.

Connector insertion ports

21 and 22 are exposed on the rear surface B, and a heat sink 23 is attached above the

connector insertion ports

21 and 22.

The heat sink 23 has a heat dissipation mechanism for releasing heat generated inside the housing 1 to the outside, and is formed by die casting such as aluminum die casting. In order to enhance the heat dissipation effect, the heatsink 23 is provided with heat dissipating fins 23a on the upper surface side to widen the heat dissipating area. The plurality of heat radiating fins 23a provided on the heat sink 23 function as the above-described heat radiating mechanism, and the grooves between the heat radiating fins 23a function as drainage paths to drain the water that has entered the upper surface C of the housing 1 to the back surface B side. .

A pair of recessed grooves 32 that are recessed from the surface are formed in the sheet metal cover 31 that is the upper surface C. A plurality of heat radiation holes 33 for releasing heat generated inside the housing 1 to the outside are formed in a region outside the pair of recessed grooves 32. The recessed groove 32 guides water that has fallen on the cover 31 or water that has adhered due to scattering to the center side behind the cover 31. Further, since the pair of recessed grooves 32 have a shape in which the mutual arrangement interval is narrowed toward the center side behind the cover 31, the water in the recessed grooves 32 is guided to the center side behind the cover 31 to drain the water. can do. Thus, by providing the recessed groove 32, it is possible to suppress the intrusion of water into the outer region of the recessed groove 32 and to form the heat radiation hole 33.

On the lower surface D, a substrate and a drive mechanism for driving an in-vehicle audio device are mounted. The right side surface E and the left side surface F are formed with a plurality of heat radiation holes 41 for releasing the heat generated inside the housing 1 to the outside. If water enters from the heat radiation holes 41a provided in the vicinity of the center of the right side surface E and the left side surface F, the operation of the substrate and the drive mechanism disposed inside the housing 1 may be troubled. The pair of recessed grooves 32 provided on the side prevents water from entering the heat radiation holes 41a provided near the center of the right side E and the left side F.

FIG. 2 is a side view showing attachment of the in-vehicle audio device to the vehicle according to the first embodiment. FIG. 2 is a view of the casing 1 of the in-vehicle audio device attached to the instrument panel (hereinafter referred to as instrument panel) 100 of the vehicle as viewed from the right side E direction.
When mounting the housing 1 of the in-vehicle audio device to the instrument panel 100, the back surface B is inclined downward due to the structure of the vehicle, and the cover 31 (upper surface C) of the housing 1 is a horizontal plane of the vehicle as shown in FIG. Is inclined downward at an angle θ. The angle θ can be set as appropriate. For example, the angle θ is attached at an angle of about 20 to 30 degrees.

Due to the downward inclination of the angle θ, for example, the cover 31 is wetted by water droplets dropped from an air-conditioner duct attached to the top of the housing 1 or water adhering to the user's beverage scattered near the housing 1. Even in this case, the water is led to the center side behind the cover 31 by the recessed groove 32 and drained. 2 shows a configuration in which the housing 1 is disposed at an angle θ downwardly inclined with respect to the horizontal plane of the vehicle, but a configuration in which the cover 31 (upper surface C) of the housing 1 is inclined to be inclined at a predetermined angle. It is good.

Next, the drainage path and the drainage structure when the casing 1 of the in-vehicle audio device is flooded will be described with reference to FIGS. 3 to 5.
FIG. 3 is an explanatory diagram showing a drainage path provided on the cover (upper surface) of the in-vehicle audio device according to the first embodiment. In addition, in FIG. 3, the drainage path is shown for the case where the area | region G of the cover 31 was flooded. 4A and 4B are diagrams showing the structure of the cover of the in-vehicle audio apparatus according to Embodiment 1, FIG. 4A is a perspective view of the cover, and FIG. 4B is a cross-sectional view taken along the line aa in FIG. FIG. 5A and 5B are diagrams showing the structure of the heat sink of the in-vehicle audio apparatus according to the first embodiment. FIG. 5A is a perspective view of the heat sink, and FIG. 5B is the heat sink shown in FIG. FIG. 5C is a view of the heat sink shown in FIG. 5A as viewed from above.

As shown in FIG. 3, the water that has entered the region G of the cover 31 moves in the drainage direction H in the region sandwiched between the pair of recessed grooves 32 on the cover 31 and in the pair of recessed grooves 32. The central part of the rear surface B or the rear side of the right side surface E via the first drainage path 24a formed in the heat sink 23 or the second drainage path 24b and the third drainage path 24c. And drained behind the left side F.

As shown in FIG. 3 and FIG. 4A, the pair of recessed grooves 32 formed in the cover 31 are arranged with respect to each other toward the center side behind the cover 31 when the housing 1 is viewed from above. Has a narrowing shape. Thereby, the water on the cover 31 can be collected on the rear center side. Further, as shown in FIG. 4B, the recessed groove 32 has a shape recessed by a predetermined distance from the surface of the cover 31, so that water on the cover 31 collects in the recessed groove 32. Since the housing 1 is arranged with the angle θ, the water does not flow out to the right side surface E and the left side surface F, but flows in the recessed groove 32 in the drain direction H and flows out to the heat sink 23 side. With these structures, water can be prevented from entering the heat radiation holes 33 and the heat radiation holes 41a.

Next, the drainage structure provided in the heat sink 23 will be described.
As shown in FIG. 5, on the upper surface side of the heat sink 23, a plurality of radiating fins 23 a are erected in parallel in the width direction of the housing 1 at a predetermined interval. The heat radiating fins 23a have a thin plate-like rectangular cube shape that is long in the draining direction H. Of these radiating fins 23a, a first drainage path 24a for draining water in the drainage direction H is constituted by a first groove 23b formed between the radiating fins 23a disposed in the center of the heat sink 23. .
Furthermore, a second groove 23c extending along the tangent line between the cover 31 and the heat sink 23 is provided, and the second groove 23c is provided with a second drainage path 24b and a housing that can drain to the right side E of the housing 1. A third drainage path 24c capable of draining is configured on the left side surface F of the body 1.

Further, as shown in FIGS. 5 (b) and 5 (c), only the first drainage path 24a is used as the drainage path in the drainage direction H, and the second end for preventing water intrusion at both ends of the heat sink 23. One wall portion 25a and a second wall portion 25b are provided. The water that flows out from the cover 31 and the recessed groove 32 in the drainage direction H travels along the first drainage path 24a and collides with the first wall part 25a and the second wall part 25b, and the second drainage path 24b and the second drainage path 24b. 3 is drained from the drainage path 24c. The first wall portion 25a and the second wall portion 25b can prevent water from entering the

connector insertion ports

21 and 22. Further, in the heat sink 23, since water does not enter the region where the first wall portion 25a and the second wall portion 25b are formed, the heat radiation hole 26 can be formed.

As shown in FIGS. 3 to 5, the water on the cover 31 is collected by the recessed groove 32 on the center side behind the cover 31 and drained from the first drainage path 24a to the center portion of the back surface B. Water is drained from the second drainage path 24b and the third drainage path 24c to the rear of the right side E and the rear of the left side F. Thereby, the area | region which forms a heat radiating hole on the cover 31 in the center vicinity of the right side E and the left side F of the housing | casing 1 can be ensured.

Next, another configuration of the pair of recessed grooves 32 described above will be described with reference to FIG. 6A and 6B are diagrams showing another structure of the in-vehicle audio apparatus according to Embodiment 1, FIG. 6A is a perspective view showing the structure of the cover, and FIG. 6B is a view showing the drainage path.
The cover 31 shown in FIG. 6A is formed with a pair of recessed

grooves

34a and 34b. The recessed

grooves

34 a and 34 b are deformed with respect to the pair of recessed grooves 32 described above, but have the same function as the pair of recessed grooves 32. The pair of recessed

grooves

34a and 34b has a shape in which a mutual arrangement interval is narrowed toward the center side behind the cover 31 when the housing 1 is viewed from above, and the end of one recessed groove 34b is formed on the front surface A. It is extended to the side. This is deformed based on the shape of the substrate or drive mechanism located below the cover 31.
As described above, the shape of the recessed

grooves

34 a and 34 b provided in the cover 31 can be changed as appropriate according to the shape of the substrate or drive mechanism located below the cover 31 or the opening position of the heat radiation hole 33.

As shown in FIG. 6B, the water that has entered the region G of the cover 31 flows in the drainage direction H in the region sandwiched between the pair of recessed

grooves

34a and 34b on the cover 31 and the pair of recessed

grooves

34a and 34b. To the center of the back of the cover 31 and the first drainage path 24a formed in the heat sink 23, or the second drainage path 24b and the third drainage path 24c, and the rear B The water is drained behind the center or right side E and behind the left side F.

As shown in FIG. 6, the water on the cover 31 is collected by the recessed

grooves

34a and 34b on the center side behind the cover 31 and drained from the first drainage path 24a to the center portion of the back surface B. The water is drained from the second drainage path 24b and the third drainage path 24c to the rear of the right side E and the rear of the left side F. Thereby, the area | region which forms a heat radiating hole on the cover 31 in the center vicinity of the right side E and the left side F of the housing | casing 1 can be ensured.

As described above, according to the first embodiment, a pair of grooves that are recessed by a predetermined distance from the surface of the cover 31 of the housing 1 and whose arrangement intervals are narrowed toward the center of the back of the cover 31. Since the concave groove 32 is provided, the water on the cover 31 can be drained to the center side of the back surface B by arranging the housing 1 at a predetermined angle in the back surface B direction. Thereby, the heat dissipation holes required for the cover 31 and the left and right side surfaces E and F of the housing 1 can be secured. A similar effect can be obtained when a pair of recessed

grooves

34a and 34b are provided.

Moreover, according to this Embodiment 1, a pair of recessed groove 32 which guides the water flooded to the cover 31 of the housing | casing 1 to the back center side is provided, and the water which flowed out from the cover 31 and the recessed groove 32 is back B Since the heat sink 23 having the first drainage path 24a for draining is provided in the central part of the water, the water on the cover 31 can be drained from the central part of the back surface B. Thereby, it is possible to prevent water from entering the inside of the housing 1 from the heat radiation holes 33 on the cover 31 and the heat radiation holes 41 a provided on the left and right side surfaces E and F of the housing 1. In addition, the

connector insertion ports

21 and 22 provided at both ends of the back surface B can be prevented from being wetted. A similar effect can be obtained when a pair of recessed

grooves

34a and 34b are provided.

Further, according to the first embodiment, since the

concave grooves

34a and 34b deformed according to the shape of the substrate or drive mechanism located below the cover 31 are provided, the degree of freedom of the configuration of the housing 1 is increased. be able to.

In the first embodiment described above, the pair of recessed grooves 32 or the pair of recessed grooves having a shape in which the arrangement interval is narrowed toward the center side behind the cover 31 when the housing 1 is viewed from above. Although the structure which provides 34a, 34b was shown, it is the shape which can drain the water on the cover 31 from the back center side, and the water to the heat radiating hole 41a provided in the center part of the right and left side surfaces E and F of the housing | casing 1 is shown. Any shape can be used as long as the shape can prevent the intrusion. In addition, the arrangement | positioning which can ensure more widely the area which collects the water which permeated on the cover 31 is desirable.

Moreover, in Embodiment 1 mentioned above, although the water on the cover 31 was collected in the back center side of the cover 31, and the structure drained to the center part of the back surface B via the 1st drainage path 24a was shown, connector insertion The drainage position can be appropriately changed depending on the positions where the

ports

21 and 22 are arranged. For example, when the

connector insertion ports

21 and 22 are arranged at the right end portion of the back surface B, the shape of the recessed

grooves

32, 34 a, and 34 b and the first drainage path so as to drain water from the left end portion side of the back surface B. The arrangement position of 24a is changed.

In addition to the configuration of the first embodiment described above, the grooves of the recessed

grooves

32, 34a, 34b are continuously formed up to the rear end of the cover 31, and the water collected in the recessed

grooves

32, 34a, 34b is collected. May flow directly into the first drainage path 24a.

In addition to the configuration of the first embodiment described above, the first drainage from the right side E and the left side F of the housing 1 to the bottom surfaces of the second drainage path 24b and the third drainage path 24c of the heat sink 23. An inclination that rises toward the path 24a may be provided to promote drainage of water in the second drainage path 24b and the third drainage path 24c, and to prevent water from remaining.

In the first embodiment described above, the configuration in which the recessed groove having a shape recessed from the surface of the cover 31 by a predetermined distance is provided. However, a water shielding body protruding from the surface of the cover 31 by a predetermined distance is provided, You may comprise so that it may drain from the back center side.

Embodiment 2. FIG.
In this Embodiment 2, the structure which provides a recessed part instead of a pair of recessed groove of the housing | casing 1 of Embodiment 1 mentioned above is shown.
7A and 7B are diagrams showing the structure of the cover of the in-vehicle audio device according to the second embodiment. FIG. 7A is a perspective view showing the cover, and FIG. 7B is a line bb in FIG. 7A. Sectional drawing and FIG.7 (c) are figures which show a drainage path.
In other configurations other than the cover 31, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and the description thereof is omitted or simplified.

A recess 35 is formed in the cover 31 shown in FIG. The recess 35 has a hexagonal shape that is narrowed toward the center side behind the cover 31 when the housing 1 is viewed from above. Thereby, the water on the cover 31 can be guided to each hexagonal wall surface and collected on the rear center side. Further, as shown in FIG. 7B, the recess 35 has a shape that is recessed by a predetermined distance from the surface of the cover 31, so that water on the cover 31 collects in the recess 35. Since the housing 1 is arranged with the angle θ, the water in the recess 35 flows in the drain direction H without flowing out to the right side E and the left side F and flows out to the heat sink 23 side. With these structures, water can be prevented from entering the heat radiation holes 33 and the heat radiation holes 41a.

As shown in FIG. 7 (c), the water that has entered the region G of the cover 31 moves in the inner region of the recess 35 on the cover 31, and is guided to each hexagonal wall surface so that the center behind the cover 31. Move to the side. Since the cover 31 has a downward inclination of an angle θ, water flows out to the heat sink 23 side, and passes through the first drainage path 24a or the second drainage path 24b and the third drainage path 24c formed in the heat sink 23. Via, it is drained to the center of the back surface B or the rear side of the right side E and the rear side of the left side F.

As described above, according to the second embodiment, the polygonal concave portion 35 which is a concave portion recessed from the surface by a predetermined distance in the cover 31 of the housing 1 and is narrowed toward the center side behind the cover 31 is provided. Since it has constituted so that it may provide, the water on cover 31 can be drained to the back central side by arranging case 1 inclining at a predetermined angle in the back B direction. Thereby, the heat dissipation holes required for the cover 31 and the left and right side surfaces E and F of the housing 1 can be secured.

Further, according to the second embodiment, since the polygonal concave portion 35 capable of securing a wider area for collecting water on the cover 31 is provided, the vicinity of the center of the left and right side surfaces E and F of the housing 1 is provided. Water can be prevented from entering.

In addition, in Embodiment 2 mentioned above, although the structure which provides the hexagonal recessed part 35 was shown, it is a shape which can drain the water on the cover 31 from the back center side, and the right-and-left side surfaces E and F of the housing | casing 1 are shown. Any shape that can prevent water from entering the heat radiating hole 41a provided in the vicinity of the center may be used, and the shape is not limited to a hexagonal shape. The shape of the concave portion 35 is desirably a shape that ensures a wider area for collecting water.

Further, in addition to the configuration of the second embodiment described above, the concave portion 35 is formed by continuously forming the concave shape of the cover 31 up to the rear side end portion, and the water collected in the concave portion 35 directly enters the first drainage path 24a. You may comprise so that it may flow.

In the second embodiment described above, the water on the cover 31 is drained from the rear central side and the central portion of the back surface B. However, the drainage position is appropriately determined depending on the arrangement positions of the

connector insertion ports

21 and 22. It can be changed.

Embodiment 3 FIG.
In this Embodiment 3, the structure which drains from the 1st drainage path 24a positively the water which was collected on the cover 31 and flowed out in the drainage direction H is shown. The third embodiment can be applied to the first and second embodiments described above.
8A and 8B are diagrams showing the structure of the heat sink of the in-vehicle audio apparatus according to the third embodiment. FIG. 8A is a view of the heat sink viewed from the X direction (see FIG. 5), and FIG. It is the figure which looked at from the upper part. In other configurations than the heat sink 23, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and the description thereof is omitted or simplified.

As shown in FIG. 8, the heat sink 23 has a plurality of heat radiating fins 23 a standing in parallel at predetermined intervals in the width direction of the housing 1, as in the first embodiment, and is arranged at the center of the heat sink 23. A first drainage path 24a is constituted by the first groove 23b formed between the heat radiating fins 23a. Furthermore, a second groove 23c extending along a tangent line between the cover 31 and the heat sink 23 is provided, and the second groove 23c is provided with a second drainage path 24b ′ that can drain to the right side E of the housing 1 and A third drainage path 24 c ′ capable of draining is configured on the left side surface F of the housing 1. The bottom surfaces of the second drainage path 24b ′ and the third drainage path 24c ′ have an inclination that descends from the right side E and the left side F of the housing 1 toward the first drainage path 24a. By providing an inclination in the second drainage path 24b ′ and the third drainage path 24c ′, the water flowing in from the cover 31 is drained preferentially from the first drainage path 24a, and the second and third drainage paths 24b ′ and 24c ′ are inclined. The drainage channels 24b 'and 24c' are drained only when water flows over the provided slope.

By preferentially draining from the first drainage path 24a, it is possible to further suppress the intrusion of water into the

heat radiation holes

41a and 41 provided on the left and right side surfaces E and F of the housing 1. Thereby, the restriction | limiting of the position which forms an opening in the right and left side surfaces E and F is further reduced.

9 is a view showing another structure of the heat sink of the in-vehicle audio apparatus according to the third embodiment. FIG. 9 (a) is a view of the heat sink as viewed from the X direction (see FIG. 5 (a)). (B) is the figure which looked at the heat sink from the upper direction.
The heat sink 23 shown in FIG. 9 has a structure that drains only from the first drainage path 24a.

In the heat sink 23 shown in FIG. 9, a plurality of heat radiation fins 23 a are formed as in the first embodiment, and the first groove portion 23 b formed between the heat radiation fins 23 a disposed in the center of the heat sink 23. A first drainage path 24a is configured. Furthermore, a pair of

partition members

27a and 27b that guide the inflow of water only to the first drainage path 24a are provided in the second groove 23c extending along the tangent line between the cover 31 and the heat sink 32. By the

partition members

27a and 27b, the water flowing from above the cover 31 is drained only to the back surface B via the first drainage path 24a, and drainage to the right side surface E and the left side surface F of the housing 1 is performed. I can be dammed up.

By draining only from the first drainage path 24a, it is possible to prevent water from entering the

heat radiation holes

41a and 41 provided in the left and right side surfaces E and F of the housing 1. Thereby, there is no restriction on the position where the heat radiating holes 41 are formed in the left and right side surfaces E and F, and the degree of freedom of the configuration of the housing 1 is increased.

As described above, according to the third embodiment, the first drainage path 24a from the right side E and the left side F of the housing 1 to the bottom surfaces of the second drainage path 24b ′ and the third drainage path 24c ′. Since the downward slope is provided, the water that has flowed in from the cover 31 can be preferentially drained from the first drainage path 24a, and the

heat radiation holes

41a and 41 provided in the left and right side surfaces E and F of the housing 1 are provided. Infiltration of water into the can be suppressed. Thereby, the restriction | limiting of the arrangement position of the thermal radiation hole 41 of the right-and-left side surfaces E and F is reduced.

According to the third embodiment, since the pair of

partition members

27a and 27b for guiding the inflow of water only to the first drainage path 24a are provided in the second groove portion 23c, the right side surface of the housing 1 is provided. E and drainage to the left side F can be prevented. Thereby, the restriction | limiting of the arrangement position of the

thermal radiation holes

41a and 41 of the right-and-left side surfaces E and F is lose | eliminated, and the freedom degree of the structure of the housing | casing 1 can be raised.

In addition, in Embodiment 3 mentioned above, although the structure which drains the water on the cover 31 from the center part of the back surface B was shown, the drainage position can be suitably changed with the arrangement position of the

connector insertion ports

21 and 22. FIG. For example, when the

connector insertion ports

21 and 22 are collectively arranged at the right end of the back surface B, the position of the first drainage path 24a and the distribution or partition of the gradient so as to drain from the left end of the back surface B. The arrangement positions of the

members

27a and 27b are changed.

In the present invention, within the scope of the invention, any combination of the embodiments, any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

As described above, the electronic device according to the present invention secures a drainage path when the casing is flooded without suppressing the formation of heat radiating holes for radiating the heat generated inside the device to the outside. Therefore, it is suitable for use in embedded devices such as in-vehicle electronic devices, marine electronic devices, aircraft electronic devices, and home appliance electronic devices.

1 housing, 10 design surface, 11 operation buttons, 12 operation dial, 13 disk insertion port, 21, 22 connector insertion port, 23 heat sink, 23a heat dissipation fin, 23b first groove, 23c second groove, 24a first Drainage path, 24b, 24b 'second drainage path, 24c, 24c' third drainage path, 25a first wall, 25b second wall, 26 heat dissipation holes, 27a, 27b partition member, 31 cover , 32, 34a, 34b, recessed groove, 33, 41, 41a heat dissipation hole, 35 recess, 100 instrument panel, A front, B back, C top, D bottom, E right side, F left side, G region, H drainage direction.

Claims

In an electronic device including a housing having a heat dissipation hole on at least one of the left and right side surfaces,
An electronic apparatus comprising a recess provided on an upper surface of the housing and guiding liquid that has entered the upper surface to the rear of the upper surface of the housing.
2. The electronic apparatus according to claim 1, wherein the concave portions are a pair of concave grooves whose arrangement intervals are narrowed toward the rear of the upper surface of the housing as viewed from above.
The heat sink which formed the 1st drainage path which was provided in the back of the above-mentioned case, and discharged the liquid which the above-mentioned crevice led from the back part of the upper surface of the above-mentioned case is provided. 2. The electronic device according to 2.
4. The first drainage path is a groove that is provided at a position facing the rear part of the upper surface of the housing in the heat sink and drains the liquid guided by the concave part to the rear. The electronic device described.
The heat sink comprises a groove formed along a tangent to the upper surface of the housing, and includes a second drainage path for discharging the liquid guided by the recess to the left and right sides through the groove. The electronic device according to claim 4.
The electronic apparatus according to any one of claims 1 to 5, wherein the casing is attached to the attachment member so as to have a downward slope.
6. The electronic apparatus according to claim 5, wherein the second drainage path has an inclination in which a bottom surface of the groove descends from left and right ends toward the first drainage path.
5. A groove formed along a tangent to the upper surface of the housing in the heat sink, and a pair of partition members that divide the groove left and right by the width of the first drainage path. The electronic device described.
2. The electronic apparatus according to claim 1, wherein the recess has a planar shape constricted toward the rear of the upper surface of the housing.