JP2019145680A - Housing of on-vehicle electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for improving heat dissipation in a housing of an in-vehicle electronic device. SOLUTION: A housing 10 is arranged so as to have an upper and lower sides, and at least one ventilation hole 50 is provided in an upper surface 101 of the housing. The housing 10 includes at least one heat radiating member 20 formed on the upper surface 101 of the housing so as to cover at least a part of the ventilation holes 50 when viewed from above. The heat radiating member 20 has an eaves portion 30 and a groove forming portion 40. The eaves extend diagonally from the upper surface of the housing toward the upper side of the ventilation holes. The groove forming portion 40 is connected to the lower end portion 32 of the eaves, which is the end portion of the eaves portion on the upper surface side of the housing, and is formed so that the groove 201 is provided between the lower end portion of the eaves and the lower end portion of the eaves. [Selection diagram] FIG. 6

Description

  The present disclosure relates to a housing of an in-vehicle electronic device.

A technique is known in which a vent hole is provided in a housing of an in-vehicle electronic device in order to release heat generated in an electronic device (hereinafter referred to as an in-vehicle electronic device) mounted in the vehicle.
For example, the following Patent Document 1 proposes a technique of providing the above-described vent holes on the side surface of a housing.

JP 2000-90890 A

However, if a ventilation hole is provided on the side surface of the housing, there is a problem that heat radiation is not sufficiently performed.
One aspect of the present disclosure is to provide a technique for improving heat dissipation in a casing of an in-vehicle electronic device.

  The casing (10) of the in-vehicle electronic device according to one aspect of the present disclosure is arranged so that there is an upper and lower side, and at least one vent hole (50) is provided on the upper surface of the casing of the in-vehicle electronic device. The on-vehicle electronic device includes at least one heat radiating member (20). The at least one heat radiating member is formed on the upper surface so as to cover at least a part of the vent hole when viewed from above. The heat dissipating member has a flange portion (30) and a groove forming portion (40). The collar portion extends obliquely from the upper surface above the ventilation hole. The groove forming portion is formed so as to be connected to the upper surface end (32) which is the above-described upper surface side end portion of the end portion of the flange portion, and the groove (201) is provided between the end portions of the upper surface side. ing.

  In general, warmed air moves upward. According to such a configuration, since the vent hole is provided on the upper surface of the housing of the in-vehicle electronic device, the heat dissipation can be further improved as compared with the technique described in Patent Document 1.

  Note that the reference numerals in parentheses described in this column and in the claims indicate the correspondence with the specific means described in the embodiment described later as one aspect, and the technical scope of the present disclosure It is not limited.

Explanatory drawing which shows the positional relationship of the whole head-up display apparatus and a windshield. FIG. 2 is a schematic diagram illustrating a head-up display device, an instrument panel of a vehicle in which the head-up display device is installed, and the interior thereof. The perspective view which shows the housing | casing of the vicinity in which the projection unit is accommodated. The perspective view which looked at the upper part of the housing | casing of the vicinity in which the projection unit is accommodated from the direction different from FIG. Sectional drawing in the VV line | wire of FIG. Explanatory drawing explaining the structure of a thermal radiation member. Sectional drawing in the VII-VII line of FIG. Explanatory drawing explaining the characteristic of a thermal radiation member. Explanatory drawing explaining the effect | action of a thermal radiation member. Explanatory drawing explaining the effect | action different from the effect | action shown in FIG. 9 of a thermal radiation member. FIG. 11A is an explanatory view showing a first modification of the heat dissipation member, FIG. 11B is an explanatory view showing a second modification of the heat dissipation member, and FIG. 11C is a third modification of the heat dissipation member. FIG. FIG. 12A is an explanatory view showing Modification Example 4 of the heat dissipation member, FIG. 12B is an explanatory view showing Modification Example 5 of the heat dissipation member, and FIG. 12C is Modification Example 6 of the heat dissipation member. FIG.

  Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Hereinafter, an example in which the present disclosure is applied to a head-up display device as an in-vehicle electronic device will be described. The on-vehicle electronic device refers to an electronic device mounted on a vehicle. The term “electronic device” as used herein refers to a device that can generate heat by consuming electric power, such as a so-called electric circuit and electronic circuit. Electronic devices may include those equipped with so-called microcomputers.

[1. Constitution]
[1-1. Head-up display device]
As shown in FIG. 1, the head-up display device 1 is fixed at a predetermined position with respect to the windshield 3 in the vehicle.

  As shown in FIG. 2, the head-up display device 1 projects light 5 representing an image onto the windshield 3 of the vehicle. When viewed from the viewpoint position 7 of the vehicle occupant, the image represented by the light 5 is imaged at an imaging position 9 in front of the windshield 3 and displayed as a virtual image.

  The head-up display device 1 is disposed inside an instrument panel (hereinafter, instrument panel) 2. In addition to the head-up display device 1, a duct 4 is disposed inside the instrument panel 2. The duct 4 may be, for example, an air conditioner duct. The head-up display device 1 is disposed inside the instrument panel 2 and below the duct 4.

  Note that water droplets may adhere to the inside of the instrument panel 2 or the outer periphery of the duct 4 due to condensation or the like. That is, the head-up display device 1 is disposed at a place where a water droplet may fall from above.

  The head-up display device 1 accommodates a housing 10, a projection unit 11, and an optical unit inside. The housing 10 is fixed to the vehicle so that there is a vertical direction. The housing 10 has a fixed position and orientation with respect to the windshield 3.

  The projection unit 11 projects light 5 representing an image. The light 5 is a laser beam. The projection unit 11 is fixed to the housing 10, and the position and orientation with respect to the housing 10 are constant. The projection unit 11 includes a component that generates a large amount of heat, such as a laser light source. That is, since the projection unit 11 is a device that generates a large amount of heat, the projection unit 11 is provided with the radiation fins 12. The heat radiating fin includes a plurality of heat radiating plates 121 which are plate-like components.

  The optical unit includes at least a concave mirror 13. The concave mirror 13 reflects the light 5 toward the windshield 3. The concave mirror 13 is fixed to the housing 10, and the position and orientation with respect to the housing 10 are constant. As described above, since the position and orientation of the housing 10 with respect to the windshield 3 are constant, the position and orientation of the concave mirror 13 with respect to the windshield 3 are also constant. The optical unit may include an optical device such as a reflecting mirror or a screen (not shown). The light 5 irradiated by the projection unit 11 is sequentially reflected by the optical device provided in the optical unit, and is led out toward the windshield 3 through the concave mirror 13.

  In addition, the path | route of the light 5 in the head-up display apparatus 1 shown with the dotted line in FIG. 2 is shown typically, and does not necessarily represent the path | route of the light 5 exactly | strictly. The light 5 projected from the projection unit 11 can take various paths in the head-up display device 1 depending on the configuration inside the head-up display device 1.

  Hereinafter, in the head-up display device 1, a portion in which the projection unit 11 and the radiation fin 12 are accommodated is referred to as a projection unit accommodation portion 15. In the projection unit housing portion 15, a plurality of ventilation holes 50 are provided on the upper surface (hereinafter referred to as the housing upper surface) 101 of the housing 10. That is, the housing 10 is provided with a plurality of vent holes 50 above the projection unit 11 and the heat radiating fins 12 which are devices that generate a large amount of heat. In the present embodiment, each of the plurality of vent holes 50 is formed in an elongated slit shape.

  In addition, the longitudinal direction referred to below is a direction in which the vent hole 50 extends and a direction along the length of the vent hole 50 formed in an elongated slit shape. Say. Further, the short direction is a direction perpendicular to the long direction and along the width of the vent hole 50 formed in the shape of an elongated slit.

[1-2. Heat dissipation member]
<Configuration>
3 and 4 are perspective views of the projection unit accommodating portion 15 when viewed from different directions. In the projection unit housing portion 15, the housing 10 includes a plurality of heat dissipation members 20 on the housing upper surface 101. Each of the plurality of heat dissipating members 20 is formed in a shape along the longitudinal direction and having a groove, that is, a so-called rail shape. And as shown in FIG. 5, the heat radiating member 20 is formed so that at least one part of the vent hole 50 may be covered, when it sees from upper direction. In the present embodiment, in particular, each of the plurality of heat dissipating members 20 is formed so as to cover all of the vent holes 50 when viewed from above.

  The heat dissipating member 20 includes a flange portion 30 and a groove forming portion 40. The collar portion 30 is formed so as to extend along the above-described longitudinal direction, which is the direction in which the heat dissipation member 20 extends. Further, as shown in FIG. 6, the flange portion 30 is formed so as to extend obliquely from the upper surface 101 of the housing toward the upper side of the vent hole 50. Hereinafter, of the two end portions of the flange portion 30, the upper end portion is referred to as a flange upper end portion 31, and the lower portion, that is, the end portion on the housing upper surface 101 side is referred to as a flange lower end portion 32.

In addition, below, when each is demonstrated among several structures like the several heat radiating member 20, a subscript is attached | subjected and demonstrated like the heat radiating member 20a.
The groove forming portion 40 is formed so as to extend along the above-described longitudinal direction, which is the direction in which the heat dissipation member 20 extends. The groove forming portion 40 is connected to the heel lower end portion 32 of the heel upper end portion 31 and the heel lower end portion 32 that are ends of the heel portion 30. In the groove forming part 40, the end part connected to the heel lower end part 32 is referred to as a groove connecting part 41. The groove forming portion 40 is shaped to provide a groove 201 between the heel lower end portion 32 and the groove connecting portion 41 by connecting the groove connecting portion 41 to the heel lower end portion 32. In the present embodiment, the groove forming portion 40 has a return portion 42 that extends obliquely upward toward the opposite side of the direction in which the flange portion 30 extends from the groove connecting portion 41. Thereby, the heat radiating member 20 can collect water droplets in the groove 201.

  In this embodiment, in particular, the groove forming portion 40 is connected to the heel lower end portion 32 with the groove connecting portion 41, so that one of the end portions in the longitudinal direction is between the heel lower end portion 32 and the groove connecting portion 41. It is formed so that the groove | channel which inclines from one edge part to the other edge part may be provided. Specifically, as shown in FIG. 7, the groove forming portion 40 has a height h from the housing upper surface 101 at one end among the ends in the longitudinal direction, and the housing upper surface at the other end. It is formed higher than the height i from 101.

  Here, one end of the end portions in the longitudinal direction is located inside the housing 10 relative to the other end. Here, the inside of the housing 10 refers to a side close to the center position of the housing 10. The groove forming portion 40 is formed so that the height from the upper surface 101 of the case in the portion from the inside of the case 10 is high and the height from the upper surface 101 of the case in the portion from the outside of the case 10 is low. Yes.

  In other words, the groove forming portion 40 is inclined so as to gradually become lower from the inside to the outside of the housing 10. That is, the groove 201 is formed to have an inclination that gradually decreases from the inside to the outside of the housing 10.

Thereby, the heat dissipation member 20 can cause the water droplets accumulated in the groove 201 to flow toward the outside of the housing 10.
In the present embodiment, a plurality of ventilation holes 50 are formed in the casing upper surface 101 of the casing 10 so as to be arranged in parallel along the short direction. The heat radiating member 20 is provided in each of the plurality of vent holes 50. That is, as shown in FIG. 6, for example, in two adjacent vent holes 50a and 50b, the groove forming portion 40a of the heat radiating member 20a arranged so as to cover one vent hole 50a and the other vent hole 50b are covered. An opening 202 is formed between the heat radiation member 20b and the flange portion 30b. The opening 202 is formed by the groove forming portion 40a of one heat radiating member 20a and the flange portion 30b of the other heat radiating member 20b adjacent to the groove forming portion 40a among the two adjacent heat radiating members 20a and 20b. It is a gap.

Thereby, the heat dissipation member 20 can release the heat generated in the projection unit 11 to the outside of the housing 10 through the opening 202.
The heat radiating member 20 configured as described above can integrally mold the flange portion 30 and the groove forming portion 40 using, for example, a mold that is divided in the vertical direction. Moreover, the several heat radiating member 20 can be shape | molded integrally using a metal mold | die.

<Features>
In the heat radiating member 20, the opening size a, the groove forming portion height b, the flange portion height c, the flange portion width d, the groove forming portion width e, the cross-sectional area f of the groove 201 shown in FIG. By appropriately adjusting the inclination angle g of the groove 201, the amount of heat released from the vent hole 50, the amount of water stored in the groove 201, the amount of drainage by the groove 201, and the like can be adjusted.

  Here, the opening size a is the length of the opening 202 in the vertical direction. That is, as described above, the groove forming portion 40a of the heat radiating member 20a disposed along one vent hole 50a and the heat radiating member 20b disposed along the other vent hole 50b adjacent to the vent hole 50a. It is the length between the collar part 30b. The groove forming portion height b is the height of the end portion on the side farther from the flange portion 30 among the end portions in the groove forming portion 40. Note that the height here refers to the height from the top surface 101 of the housing.

  The collar part height c is the height of the collar upper end part 31 of the collar part 30. The collar part width d is a length when the collar part 30 is projected on the housing upper surface 101 from the upward improvement. The groove forming portion width e is a length when the groove forming portion 40 is projected onto the housing upper surface 101 from the upward improvement. The cross-sectional area f of the groove 201 is a cross-sectional area of the groove 201 in the short direction. The inclination angle g of the groove 201 is an angle formed between the bottom surface of the groove 201 and the upper surface 101 of the housing.

(1. Heat dissipation)
By increasing the opening size a, it is possible to increase the heat radiation amount. Moreover, it is possible to reduce the heat radiation amount by reducing the opening size a.

(2. Intrusion amount)
By reducing the opening size a, it is possible to reduce the amount of water droplets entering the housing 10 (hereinafter referred to as the amount of penetration). Further, the amount of penetration can be increased by increasing the opening size a.

(3. Amount of water stored)
By setting the groove forming part height b> 0 and the collar part height c> 0, water can be stored in the groove 201. By increasing the cross-sectional area f of the groove 201, the amount of water stored in the groove 201 can be increased. Further, by reducing the cross-sectional area f of the groove 201, the amount of water stored in the groove 201 can be reduced.

(4. Drainage speed)
By increasing the inclination angle g of the groove 201, it is possible to increase the speed (hereinafter referred to as drainage speed) when water droplets that have accumulated in the groove 201 flow along the inclination of the groove 201 (hereinafter also referred to as drainage). is there. Further, the drainage speed can be reduced by reducing the inclination angle g of the groove 201. As shown in FIG. 7, the inclination angle g includes the height h from the housing upper surface 101 at one end of the ends in the longitudinal direction of the groove forming portion 40 and the housing at the other end. The angle depends on the difference from the height i from the upper surface 101 (hereinafter, altitude difference). In the heat radiating member 20, the inclination angle g can be increased as the difference in altitude is increased.

<Action>
As shown in FIG. 9, the heat dissipating member 20 configured in this manner dissipates heat generated in the projection unit 11 through the vent hole 50 and the opening 202. Further, since the heat radiating member 20 is formed so as to cover the vent hole 50 when viewed from above, even if a water droplet falls from above, the water droplet enters the inside of the housing 10 from the vent hole 50. It is suppressed.

  Further, in the heat radiating member 20, even if water drops fall from above, the water drops are stored in the grooves 201. Furthermore, in the heat radiating member 20, as shown in FIG. 10, the water droplets accumulated in the groove 201 flow from the inside of the housing 10 to the outside along the inclination of the groove 201.

[2. effect]
According to the first embodiment described in detail above, the following effects can be obtained.
(2a) The housing 10 is arranged so that there is an upper and lower side, and at least one vent hole 50 is provided on the upper surface 101 of the housing. The housing 10 includes at least one heat radiating member 20 formed on the housing upper surface 101 so as to cover at least a part of the vent hole 50 when viewed from above. The heat dissipating member 20 includes a flange portion 30 and a groove forming portion 40. The collar portion 30 is formed so as to extend obliquely from the upper surface 101 of the housing toward the upper side of the vent hole 50. The groove forming portion 40 is connected to the heel lower end portion 32 which is the end portion on the housing upper surface 101 side of the heel upper end portion 31 and the heel lower end portion 32 which are two end portions, and the groove is formed between the groove forming portion 40 and the heel lower end portion 32. Is formed to be provided.

  In general, warmed air moves upward. As a result, since the vent hole 50 is provided on the upper surface of the housing 10, the heat dissipation can be further improved as compared with the technique described in Patent Document 1.

  Moreover, in this embodiment, since the housing | casing 10 is equipped with the heat radiating member 20 formed so that an air hole may be covered when it sees from upper direction on the upper surface, as a result, the head-up display apparatus 1 is in a vehicle. When installed, water droplets can be prevented from entering the housing 10 from above such as the instrument panel 2 and the duct 4.

  Furthermore, in the present embodiment, the heat radiating member 20 is configured such that the groove 201 is provided on the housing upper surface 101 side by the flange portion 30 and the groove forming portion 40, so that water droplets from above enter the groove 201. It is possible to accumulate. As a result, since water droplets from above are stored in the groove 201, it is possible to prevent water droplets from above from entering the housing 10.

  (2b) The heat dissipation member 20 is configured to extend along the vent hole 50. The collar portion 30 is formed to extend in the longitudinal direction, which is the direction in which the heat dissipation member 20 extends. The groove forming portion 40 is formed so as to extend in the longitudinal direction, and a groove 201 that is inclined from one end portion to the other end portion among the end portions in the longitudinal direction is provided between the groove forming portion 40 and the lower end portion 32 of the heel. Is formed.

As a result, since the water droplets stored in the groove 201 from above are drained by the inclined groove 201, the intrusion of water droplets into the housing 10 can be suppressed.
(2c) The groove forming portion 40 is formed such that, of the end portions in the longitudinal direction, the height from the housing upper surface 101 at one end portion is higher than the height from the housing upper surface 101 at the other end portion. Yes. As a result, in the longitudinal direction of the heat dissipating member 20, water accumulated from one end of the groove 201 to the other end can be allowed to flow, so that intrusion of water droplets into the housing 10 can be suppressed. it can.

  (2d) In the groove forming portion 40, one end portion of the end portions in the longitudinal direction is located inside the housing 10 relative to the other end portion. As a result, the heat radiating member 20 can cause the water droplets accumulated in the groove 201 to flow from the inside to the outside of the housing 10, so that the penetration of water droplets into the housing 10 can be suppressed.

[3. Modified example]
Since the basic configuration of the following modification is the same as that of the above-described embodiment, differences will be described below. In addition, the same code | symbol as the said embodiment shows the same structure, Comprising: The previous description is referred.

  (Modification 1) In the said embodiment, in the heat radiating member 20, the collar part 30 forms the collar upper end part 31 among the collar upper end part 31 and collar lower end part 32 which are two edge parts upward with respect to a horizontal direction. It had been. On the other hand, as shown in FIG. 11A, in the heat radiating member 20d of the first modification, the collar upper end 31d, which is the end of the collar 30d above the vent hole 50, may be formed horizontally. .

  Horizontal here refers to a direction perpendicular to the above-described vertical direction. Note that “vertical” is not limited to vertical in a strict sense, and may not be strictly vertical as long as the same effect is obtained. As a result, the heat radiating member 20d can further suppress the intrusion of water droplets into the housing 10 than a configuration in which the upper end portion of the heel is not formed horizontally.

  Further, as shown in FIG. 11A, the groove forming portion 40d is formed so as to extend horizontally from the heel lower end portion 32 and extends in the vertical direction at the end opposite to the heel lower end portion 32. It may have a portion 42d. As a result, the heat dissipating member 20d can collect water droplets in the groove 201d formed by the flange portion 30d and the groove forming portion 40d.

(Modification 2) As shown in FIG. 11 (b), in the heat radiating member 20e of Modification 2, the collar upper end 31e, which is the end of the collar 30e above the vent hole 50, may be formed downward. .
Thereby, in the heat radiating member 20e, when a plurality of heat radiating members 20e are arranged as shown in FIG. 11 (b), a groove is formed from the heel upper end portion 31e of one of the adjacent heat radiating members 20e to the other heat radiating member 20e. Water droplets can flow toward the portion 40e. That is, the heat radiating member 20e can further suppress the intrusion of water droplets into the housing 10 and can collect more water droplets in the grooves 201f than the configuration in which the upper end portion of the heel is not formed downward.

  (Modification 3) As shown in FIG. 11 (c), in the heat dissipating member 20f of Modification 3, the heel upper end 31f may be formed downward so as to draw a curve. Further, the groove forming portion 40f may have a return portion 42f formed so as to extend obliquely upward so as to draw a curve. As a result, an effect similar to that of the above-described (Modification 2) can be obtained.

  (Modification 4) As shown in FIG. 12 (a), in the heat radiating member 20g of Modification 4, when the heel upper end 31g is viewed from above, the groove forming part 40g of another adjacent heat radiating member 20g You may form so that it may overlap with at least one part. That is, the collar part 30g may be formed in the shape further extended more than the overlap length which is a predetermined length diagonally upward from the collar part 30 in the said embodiment. As shown in FIG. 12 (a), the overlapping length here is such that when viewed from above, the heel upper end portion 31g overlaps at least a part of the groove forming portion 40g of another adjacent heat radiating member 20g. Of length P. As a result, the heat radiating member 20 g can further suppress the intrusion of water droplets into the housing 10.

  (Modification 5) As shown in FIG. 12B, in the heat dissipating member 20h of Modification 5, the heel upper end 31h is formed horizontally, and when viewed from above, another heat dissipating member adjacent thereto You may form so that it may overlap with at least one part of the groove | channel formation part 40h of 20h. That is, the heel upper end portion 31h may be formed in a shape in which the heel upper end portion 31d of (Modification 1) is further extended in the horizontal direction by an overlap length that is a predetermined length. The overlapping length here is a length P that is such that when viewed from above, the upper end 31g of the heel overlaps at least a part of the groove forming portion 40h of another adjacent heat radiating member 20h. As a result, the same effects as (Modification 1) and (Modification 4) can be obtained.

  (Modification 6) As shown in FIG. 12 (c), in the heat radiating member 20i of Modification 5, the heel upper end portion 31i is formed downward and is adjacent to another heat radiating member when viewed from above. It may be formed so as to overlap at least a part of the groove forming portion 40i of 20i. That is, the heel upper end portion 31i may be formed in a shape that further extends downward from the heel upper end portion 31d of (Modification 2) by an overlap length that is a predetermined length. The overlapping length here is a length P that is such that the upper end portion 31i overlaps at least a part of the groove forming portion 40i of another adjacent heat radiating member 20i when viewed from above. As a result, the same effects as those of (Modification 2) and (Modification 4) can be obtained.

In the above embodiment, the heel upper end portion 31 corresponds to the upper end portion, and the heel lower end portion 32 corresponds to the heel upper surface end portion.
[4. Other Embodiments]
As mentioned above, although embodiment of this indication was described, this indication is not limited to the above-mentioned embodiment, and can carry out various modifications.

  (4a) In the above embodiment, the vent hole 50 is provided above the projection unit 11 and the heat radiating fins 12 in the housing 10, but the present invention is not limited to this. In the housing 10, the vent hole 50 may be provided above at least one of the projection unit 11 and the heat radiation fin 12.

  (4b) In the above embodiment, the shape of the vent hole 50 is formed in the shape of an elongated slit. However, the shape is not limited to this. The shape of the vent hole may be any shape such as a polygon including a square, a circle, and an elliptical system.

  (4c) In the above embodiment, the three vent holes 50 are provided and the heat radiating member 20 is provided for each of the three vent holes 50. However, the number of the vent holes 50 and the heat radiating members 20 is limited to three. It is not something. The number of the vent holes 50 and the heat dissipation members 20 may be arbitrary. Note that one heat radiating member 20 is not necessarily provided for one vent hole 50. That is, the heat dissipation member 20 may be provided in at least one of the plurality of vent holes 50.

(4d) In the above embodiment, each of the plurality of heat dissipation members 20 is formed so as to cover all of the vent holes 50 when viewed from above, but is not limited thereto.
Each of the plurality of heat dissipation members 20 may be formed so as to cover a part of the vent hole 50 when viewed from above. For example, the length when the collar part 30 is projected onto the upper surface 101 of the housing from the upper side in the vertical direction may be formed to be less than the length in the short direction of the vent hole 50. Thereby, while being able to suppress the water drop from the upper part invading the inside of the housing | casing 10, air permeability can be improved more.

  (4e) In the above embodiment, the head-up display device 1 has been described as a specific example of the in-vehicle electronic device. However, the in-vehicle electronic device to which the present disclosure is applied is not limited thereto. In addition to the head-up display device 1, the present disclosure is an electronic device mounted on a vehicle, and can be applied to various electronic devices that can generate heat when power is consumed. Moreover, in the said embodiment, although the head-up display apparatus 1 as a vehicle-mounted electronic device was arrange | positioned under the duct 4 in the instrument panel 2, it is not limited to this.

  The on-vehicle electronic device referred to here may be one that is disposed at an arbitrary place in the vehicle. Here, the housing may be arranged so that there is a top and bottom, and at least one vent hole may be provided on the top surface of the housing and above the electronic device. And the housing | casing may be formed with the heat radiating member so that at least one part of this ventilation hole may be covered similarly to the said embodiment. Thereby, the effect similar to the said embodiment can be acquired.

  (4f) A plurality of functions of one constituent element in the embodiment may be realized by a plurality of constituent elements, or a single function of one constituent element may be realized by a plurality of constituent elements. . Further, a plurality of functions possessed by a plurality of constituent elements may be realized by one constituent element, or one function realized by a plurality of constituent elements may be realized by one constituent element. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

    DESCRIPTION OF SYMBOLS 10 Housing | casing, 20 Thermal radiation member, 30 collar part, 31 collar upper end part, 32 collar lower end part, 40 groove formation part, 50 ventilation hole, 201 groove | channel.

Claims (5)

A vehicle-mounted electronic device housing (10),
The casing of the in-vehicle electronic device is arranged so that there is an upper and lower side, and at least one vent hole (50) is provided on the upper surface of the casing of the in-vehicle electronic device,
The upper surface includes at least one heat radiating member (20) formed so as to cover at least a part of the vent hole when viewed from above,
The heat dissipation member is
A collar portion (30) extending obliquely from the upper surface upward to the vent hole;
Groove formation formed so that a groove (201) is provided between the edge of the collar and the collar upper surface edge (32), which is the edge of the upper surface, among the edges of the collar. Part (40).
Car electronics housing. It is the housing | casing of the vehicle-mounted electronic device of Claim 1, Comprising:
The heat dissipating member is configured to extend along the vent hole,
The flange is formed to extend in the longitudinal direction, which is the direction in which the heat dissipation member extends,
The groove forming portion is formed so as to extend in the longitudinal direction, and is between the edge of the upper surface of the collar and the groove, and is one end from the other end in the longitudinal direction to the other end. An in-vehicle electronic device casing formed so as to provide a groove inclined toward the surface. It is the housing | casing of the vehicle-mounted electronic device of Claim 2, Comprising:
The groove forming portion is formed such that, of the end portions in the longitudinal direction, the height from the upper surface at one end portion is higher than the height from the upper surface at the other end portion. . It is the housing | casing of the vehicle-mounted electronic device as described in any one of Claims 1-3,
The casing (30d) is a case of an in-vehicle electronic device in which an upper end (31d) which is an upper end of the end of the flange is formed horizontally. It is the housing | casing of the vehicle-mounted electronic device as described in any one of Claims 1-3,
The casing (30e) is a case of an in-vehicle electronic device in which an upper end (31e) that is an upper end of the end of the flange is formed downward.