JP2022167219A - Attachment structure of vehicular electronic device - Google Patents

Abstract

To provide an attachment structure of a vehicular electronic device which enables an ECU to be mounted in a preferable layout while preventing exposure of the ECU to dew condensation water coming from a roof panel and heat damage of the ECU when the ECU is installed near a ceiling at the vehicle front and enables improvement of maintainability in work such as attachment and replacement of the ECU.SOLUTION: An attachment structure of a vehicular electronic device includes: a roof trim 5 located at the passenger compartment inner side relative to a roof panel 4 of a vehicle 1; a box part 10 forming a box shape with an upper case 11, which is attached to the roof trim 5 and has an opening at the passenger compartment inner side, and a lower case 12 which is attached to the upper case 11 so as to close the opening; and electronic devices 3 attached onto the lower case 12 in the box part 10.SELECTED DRAWING: Figure 2

Description

The present invention relates to a mounting structure for vehicle electronic equipment.

In recent years, many functions of vehicles are electronically controlled. For example, in trucks and buses, the detection results of sensors, radar, cameras, etc. installed in front of the vehicle are used for blind spot detection warnings and collision prevention warnings. . Therefore, it is preferable to install the ECU used for the warning function on the front side of the vehicle. Against this background, there is a system in which an ECU is attached to a ceiling base material (roof trim) attached to a roof panel (see Patent Document 1).

In Patent Document 1, the ECU is attached to the roof panel side of the ceiling base material at a position offset from the overhead console, and the ECU is distributed in the ceiling space to prevent the overhead console from becoming large and improve the visibility from the vehicle interior. I have secured. In addition, by providing a work opening in the sun visor housing, it is possible to easily perform post-installation of the ECU.

JP-A-2003-276523

Now, in Patent Document 1, an ECU is attached to the roof panel side of the ceiling base material. Distributing the ECUs in the ceiling space in this way has some advantages in terms of layout, such as preventing the overhead console from becoming too large. Since there is a possibility that the dew condensation water generated on the lower surface of the roof panel may cause water damage, it is necessary to take measures to prevent the ECU from water damage. In addition, since the influence of radiant heat from the roof panel is large, it is necessary to take measures against heat resistance of the ECU, which may lead to an increase in cost. Furthermore, the ECU is retrofitted by accessing the sun visor housing through the work opening and attaching the ECU to the ceiling base material. do not have.

The present invention has been made in view of the above problems, and its object is to prevent water damage and heat damage due to condensation water from the roof panel when installing an ECU near the ceiling in front of the vehicle. The purpose is to improve maintainability such as installation and replacement of the ECU while installing it in a layout.

The present invention has been made to solve at least part of the above problems, and can be implemented as the following aspects or application examples.

(1) A mounting structure for a vehicle electronic device according to this application example includes: a roof trim positioned closer to the interior of the vehicle than a roof panel of the vehicle; an upper case attached to the roof trim and having an opening toward the interior of the vehicle; and a box-shaped box portion formed by a lower case attached to the upper case so as to close the opening, and an electronic device attached on the lower case within the box portion.

In the mounting structure of the vehicle electronic device according to the application example, the electronic device is mounted in the lower case while being housed in the space between the upper case and the lower case. Heat damage from the roof panel can be prevented.

(2) In the vehicle electronic device mounting structure according to the application example of (1) above, the box portion is provided at the vehicle front portion of the roof trim, and the upper surface of the upper case descends from the vehicle rear side to the vehicle front side. It may include a sloping portion. As a result, when condensation occurs inside the roof panel and falls on the upper surface of the upper case, the condensed water flows to the front of the vehicle due to the tilt, so water leakage into the passenger compartment can be suppressed.

(3) In the vehicle electronic device mounting structure according to the application example of (1) or (2) above, the upper surface of the upper case has concave portions and convex portions that guide water in a specific direction when wet. A path may be formed. As a result, when condensation occurs inside the roof panel and falls on the upper surface of the upper case, the condensation water is guided in a specific direction through the flow path, causing the condensation water to leak into the passenger compartment. It is possible to prevent this from happening. In addition, the recesses and protrusions for forming the flow passages function as reinforcing ribs, which can increase the rigidity of the upper case, making it possible to reduce the weight by thinning the upper case.

(4) In the vehicle electronic device mounting structure according to any one of the application examples (1) to (3) above, the upper surface of the upper case has concave portions and convex portions for retaining water when it is exposed to water. A part may be formed. As a result, the condensed water dripping from the roof panel onto the upper surface of the upper case is led to the condensed water reservoir through the condensed water channel on the upper surface, thereby preventing the electronic equipment from getting wet even when the amount of condensed water is large. can be done. In addition, the recesses and projections for forming the condensed water flow path and the condensed water reservoir function as reinforcing ribs, which can increase the rigidity of the upper case and make it possible to reduce the thickness and weight of the upper case.

(5) In the vehicle electronic device mounting structure according to the application example of any one of (1) to (4) above, the lower case is configured such that the harness terminal portion of the electronic device is positioned on the rear side of the vehicle. A holding portion for holding the electronic device may be formed. As a result, the holding portion of the lower case holding the electronic device holds the electronic device so that the harness terminal portion of the electronic device is positioned on the rear side of the vehicle. It is possible to suppress that the harness terminal part of is exposed to water.

(6) In the vehicle electronic device mounting structure according to any one of the application examples (1) to (5) above, the box portion may have a vent on the interior side of the vehicle. As a result, the accommodation space of the electronic equipment and the vehicle interior are ventilated, and the heat generated by the electronic equipment itself is discharged into the vehicle interior, thereby preventing heat damage due to the heat generated by the electronic equipment.

(7) In the vehicle electronic device mounting structure according to the application example of any one of (1) to (6) above, the box portion has a hinge structure at the front portion of the upper case and the front portion of the lower case. None, the lower case may be rotatable in the vertical direction with the hinge structure as a fulcrum. As a result, the hinge of the lower case can be rotated to open the lower case downward and remain suspended. Maintenance is improved because there is no

(8) In the vehicle electronic device mounting structure according to the application example of any one of (1) to (7) above, the box portion may have a rear surface of the lower case located on the rear side of the vehicle relative to a rear surface of the upper case. It may be extended and a tray portion may be formed as a container. As a result, the tray portion can be used as a storage portion for storing small items such as glasses and pens.

1 is a schematic configuration diagram showing a cross section of a left side of a vehicle in an upper front portion of a vehicle compartment having a mounting structure for an electronic device for a vehicle according to an embodiment of the present invention; FIG. It is a top perspective view of the mounting structure of the electronic device for vehicles. FIG. 3 is a side sectional view taken along line A-A' of FIG. 2; FIG. 10 is a diagram showing a state before the lower case is attached to the upper case; FIG. 4 is a diagram showing a state in which the lower case is suspended from the upper case; FIG. 4A is a side cross-sectional view showing an enlarged hinge structure portion of (a) a state in which the lower case is suspended from the upper case, and (b) a state in which the lower case is attached to the upper case;

An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the following description is based on the assumption that the terms front and rear indicate the traveling direction of the vehicle, the terms up and down indicate the vertical direction of the vehicle, and the terms left and right indicate the width direction of the vehicle.

FIG. 1 is a schematic configuration diagram showing a cross section of the left side of the vehicle in the upper front part of the vehicle compartment having the vehicle electronic device mounting structure according to one embodiment of the present invention. Specifically, it is a side cross-sectional view of the vicinity of the ceiling in front of the compartment of the vehicle 1 including the box portion 10 as seen from the rear left. The box part 10 is attached above the driver's seat or the passenger's seat of the passenger compartment ceiling part 2 of the vehicle 1, and accommodates an electronic device 3 such as an ECU (Electronic Control Unit) inside.

A vehicle 1 shown in FIG. 1 is, for example, a truck, and a cabin is formed by a cab arranged in front of the truck. The passenger compartment ceiling portion 2 shown in FIG. 1 has a metal roof panel 4 forming a ceiling exterior, and a roof trim 5 located on the passenger compartment side of the roof panel 4 and forming a part of the ceiling interior. A front window 6 is arranged below the front ends of the roof panel 4 and the roof trim 5 . A box portion 10 formed by an upper case 11 and a lower case 12 is attached to the interior side of the roof trim 5 .

The upper case 11 is a box-shaped resin container that is open downward. is fixed to the roof trim 5 by a fastening member.

The lower case 12 is a resin member having a substantially rectangular plate-like base surface 121 and side surfaces extending substantially perpendicularly from each side of the base surface 121, and is attached so as to block the opening of the upper case 11. .

The electronic device 3 is attached to the upper side of the base surface 121 of the lower case 12 . In other words, the electronic device 3 is housed in the box portion 10 composed of the upper case 11 and the lower case 12 . It should be noted that the box part 10, when attached to the roof trim 5, is so high in the vertical direction that it does not reach the head of the occupant in the driver's seat or the passenger's seat and does not block the view of the occupant in the driver's seat. length, width in the left-right direction, and depth in the front-to-rear direction.

FIG. 2 is a top perspective view of the box portion 10. FIG. FIG. 3 is a side sectional view of the box portion 10 taken along line A-A' in FIG. FIG. 4 is a diagram showing a state before the lower case 12 is attached to the upper case 11. FIG. FIG. 5 is a diagram showing a state in which the lower case 12 is suspended from the upper case 11. As shown in FIG. FIG. 6 is a sectional side view showing (a) a state in which the lower case is suspended from the upper case, and (b) a state in which the lower case is attached to the upper case, each showing an enlarged hinge structure portion. The upper case 11 and the lower case 12 forming the box portion 10 will be described in detail below with reference to these drawings.

As shown in FIG. 2, the upper case 11 is formed of an upper wall 111 (upper surface in the vertical direction), four side walls 112a to 112d, and a flange portion 113 extending forward, and has a box shape with an open bottom. there is Specifically, the flat plate-shaped upper wall 111 of the upper case 11, the rear wall 112a extending substantially downward from the rear end of the upper wall 111, the front wall 112b extending substantially downward from the front end of the upper wall 111, the upper A right side wall 112c extending substantially downward from the right end of the wall 111, a left side wall 112d extending substantially downward from the left end of the upper wall 111, and a collar portion 113 extending substantially horizontally forward from the front wall 112b. It is In addition, the left side wall 112d is formed as an inclined surface curved from the left end of the upper wall 111 in this embodiment.

A rear side wall 112a of the upper case 11 of the present embodiment is partially formed with a recessed portion 114 recessed forward. Further, the rear side wall 112a of the upper case 11 has a ventilation port 117 having, for example, a grid-shaped through-hole that allows ventilation with the vehicle interior side in a part on the right side.

As shown in FIG. 3, the rear part of the upper wall 111 slopes downward from the rear to the front along the shape of the roof trim 5 . On the other hand, the front portion of the upper wall 111 is substantially horizontal. The roof trim 5 is partially opened, and the front portion of the upper wall 111 is exposed through the opening.

As shown in FIG. 2, the rear part of the upper wall 111 is formed with a condensed water flow path 115 consisting of a convex portion and a concave portion. It forms a channel that guides water in a direction. Furthermore, in the front part of the upper wall 111, that is, on the downstream side of the condensed water flow path 115, there is a concave condensed water connected to the condensed water flow path 115 for storing the condensed water flowing along the condensed water flow path 115. A water reservoir 116 is formed.

As shown in FIGS. 3 and 4, the lower case 12 has three extensions of a base surface 121, a rear extension 122a, a front extension 122b, and a right extension 122c. It is formed from a protruding hinge portion 123 .

Specifically, when attached to the upper case 11, a plate-shaped base surface 121 extending substantially horizontally below the lower case 12, and a rear extension extending substantially upward from the rear end of the base surface 121. A projecting portion 122a, a front extending portion 122b extending substantially upward from the front end of the base surface 121, and a right extending portion 122c extending substantially upward from the right end of the base surface 121 are formed. The hinge portion 123 extends forward from a portion of the upper end of the front extending portion 122b. More specifically, as shown in FIG. 4, the hinge portion 123 includes three hook portions 125 projecting from the front extending portion 122b and bent downward in an L-shape, and a shaft portion 126 connecting the tips of the hook portions 125. is formed.

As shown in FIG. 4, the base surface 121 has a plurality of holding portions 124 having mounting holes, into which fixing portions (not shown) attached to the electronic device 3 are inserted and fixed with fastening members such as bolts and nuts. , the electronic device 3 can be held in the lower case 12 . Further, the holding portion 124 of the lower case 12 is arranged so that the harness terminal portion 22 for connecting the harness 21 of the electronic device 3 is positioned on the rear side of the vehicle when the electronic device 3 is housed in the box portion 10 . .

As shown in FIGS. 3 and 4, in the front portion of the upper case 11, the upper wall 111 and the front side wall 112b have an opening 118 having a size that allows at least the hinge portion 123 of the lower case 12 to pass through. formed. The hinge portion 123 of the lower case 12 can be engaged with the front wall 112b of the upper case 11 through the opening 118 of the upper case 11. As shown in FIG.

Specifically, as shown in FIG. 4 , the upper case 11 is formed with two claw portions 119 protruding upward from the rear end of the flange portion 113 on the rear side of the flange portion 113 . 5, the hinge portion 123 of the lower case 12 is inserted into the opening 118 of the upper case 11 from below, and the claw portion 119 is engaged with the shaft portion 126 of the hinge portion 123, so that the upper case 11 is secured. It has a function to support so that it can be hung. As a result, when an operator attaches the electronic device 3 to the vehicle 1, the operator can perform work such as wiring of the electronic device 3 while the lower case 12, to which the electronic device 3 is fixed in advance, is suspended on the base surface 121. .

Further, the claw portion 119 of the upper case 11 and the hinge portion 123 of the lower case 12 form a hinge structure, and the lower case 12 can rotate in the vertical direction with the hinge portion 123 as a fulcrum. Specifically, first, as shown in FIG. 6A, when the lower case 12 is suspended, the shaft portion 126 of the hinge portion 123 is locked by the claw portion 119, and then, as shown in FIG. In addition, it is possible to close the opening of the upper case 11 by rotating the base surface 121 upward and backward using the shaft portion 126 of the hinge portion 123 as a rotation axis. Although not shown, an engaging portion capable of fixing the lower case 12 is engaged with the peripheral edge of the opening of the upper case 11 . As a result, the upper case 11 and the lower case 12 are integrated to form the box portion 10 , and the electronic device 3 is housed in the box portion 10 .

When the lower case 12 is attached so as to close the opening of the upper case 11, as shown in FIGS. A tray portion 127 that opens upward is formed between the rear extension portion 122 a and the recess portion 114 by extending rearwardly of the rear portion 122 a. The tray portion 127 functions as a container for storing sunglasses, eyeglasses, pens, and other small items, for example.

The box portion 10 configured as described above is attached to the lower case 12 with the electronic device 3 housed in the space between the upper case 11 and the lower case 12. Water exposure and heat damage from the roof panel 4 can be prevented.

Further, since the upper wall 111 of the upper case 11 slopes downward from the rear to the front, when condensation occurs inside the roof panel 4 and drips onto the upper wall 111 of the upper case 11, the condensation water Since the water flows toward the front of the vehicle due to the inclination, it is possible to suppress water leakage into the vehicle interior. Further, when condensation occurs inside the roof panel 4 and the condensed water falls on the upper wall 111 of the upper case 11, the condensed water is guided in a specific direction through the condensed water flow path 115, thereby removing the condensed water. It is possible to prevent water from leaking into the passenger compartment or the like. Furthermore, the condensed water dripping from the roof panel 4 onto the upper wall 111 of the upper case 11 is guided from the condensed water flow path 115 of the upper wall 111 to the condensed water reservoir 116, so that even when the amount of condensed water is large, the electronic device 3 can be prevented from getting wet. In addition, the recesses and projections for forming the condensed water flow path 115 and the condensed water reservoir 116 function as reinforcing ribs of the upper wall 111, thereby increasing the rigidity of the upper case 11 and reducing the weight by thinning the upper case 11. etc. becomes possible.

Further, by holding the electronic device 3 so that the harness terminal portion 22 of the electronic device 3 is positioned on the rear side of the vehicle by the holding portion 124 for holding the electronic device 3 of the lower case 12, water is prevented from entering the box portion 10 by any chance. Even if water enters, the harness terminal portion 22 of the electronic device 3 can be prevented from being exposed to water.

Then, the upper case 11 is provided with a vent 117 that allows air to pass through the inside of the vehicle interior, and the accommodation space of the electronic device 3 and the vehicle interior are ventilated, and the heat generated by the electronic device 3 itself is discharged into the vehicle interior. Heat damage due to heat generation of the electronic device 3 can be prevented.

In addition, since the lower case 12 can be opened downward by rotating the hinge portion 123 of the lower case 12 and can be kept suspended, the worker can face upward during maintenance such as attachment or replacement of the electronic device 3 . Eliminates the need for maintenance and improves maintainability.

Further, since the tray portion 127 is provided at the rear portion of the box portion 10, it can be used as a storage portion for storing small items such as glasses and pens.

This concludes the description of the embodiment of the box portion 10 of the vehicle electronic device according to the present invention, but the aspect of the present invention is not limited to this embodiment.

The box portion 10 of the above embodiment has a box-like shape with the upper case 11 opening downward, and the opening of the upper case 11 is closed by the flat plate-like base surface 121 of the lower case 12. However, the configuration of the box portion is not limited to this. For example, the lower case may have a box shape with an upper opening.

In the above embodiment, the upper wall 111 of the upper case 11 is formed with the condensed water flow path 115 and the condensed water reservoir 116 . 115 may be configured to guide the condensed water to the drain port.

In the above embodiment, the vent 117 is provided in the side wall 112a on the rear side of the upper case 11, but it may be provided in the other side walls 112b to 112d or in the lower case 12, or a plurality of vents may be provided. By providing a plurality of them, the heat radiation effect can be improved.

Reference Signs List 1 : Vehicle 2 : Interior ceiling 3 : Electronic device 4 : Roof panel 5 : Roof trim 10 : Box 11 : Upper case 12 : Lower case 111 : Upper walls 112a to 122d : Side wall 113 : Flange 114 : Recess 115 : Condensed water flow path 116 : Condensed water reservoir 117 : Vent 118 : Opening 119 : Claw 121 : Base surfaces 122a to 122c : Extension 123 : Hinge 124 : Holding 125 : Hook 126 : Shaft 127 : Tray part 21 : Harness 22 : Harness terminal part

Claims (8)

A roof trim positioned closer to the interior of the vehicle than the roof panel of the vehicle;
a box-shaped box portion formed by an upper case attached to the roof trim and having an opening on the vehicle interior side, and a lower case attached to the upper case so as to close the opening;
an electronic device mounted on the lower case within the box;
A mounting structure for an electronic device for a vehicle. The box portion is provided at the vehicle front portion of the roof trim,
The upper surface of the upper case includes a downwardly inclined portion from the rear of the vehicle to the front of the vehicle,
The mounting structure for a vehicle electronic device according to claim 1 . On the upper surface of the upper case, a flow path is formed by concave portions and convex portions to guide water in a specific direction when wet.
3. The mounting structure for vehicle electronic equipment according to claim 1 or 2. The upper surface of the upper case is formed with a recessed portion and a protruded portion to store water when it is exposed to water.
The mounting structure for a vehicle electronic device according to any one of claims 1 to 3. The vehicular electronic device according to any one of claims 1 to 4, wherein the lower case is formed with a holding portion that holds the electronic device such that a harness terminal portion of the electronic device is positioned on the rear side of the vehicle. mounting structure. 6. The mounting structure for an electronic device for a vehicle according to claim 1, wherein the box portion has a vent on the interior side of the vehicle. In the box portion, a front portion of the upper case and a front portion of the lower case form a hinge structure, and the lower case is rotatable in a vertical direction about the hinge structure portion.
The mounting structure for a vehicle electronic device according to any one of claims 1 to 6. The box portion has a rear surface of the lower case that extends further toward the rear of the vehicle than the rear surface of the upper case, and a tray portion that serves as a container.
The mounting structure for a vehicle electronic device according to any one of claims 1 to 7.

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