WO2010010876A1

WO2010010876A1 - Circuit board unit supporting structure

Info

Publication number: WO2010010876A1
Application number: PCT/JP2009/063072
Authority: WO
Inventors: 望悦見; 善光高辻; 琢磨猪股
Original assignee: カルソニックカンセイ株式会社
Priority date: 2008-07-25
Filing date: 2009-07-22
Publication date: 2010-01-28
Also published as: CN102105333B; CN102105333A

Abstract

Provided is a circuit board unit supporting structure that can make external force applied to a circuit board unit hard to affect a circuit board. Attachment portions (25) for attaching a circuit board unit (1) to a member (cross-car beam (50)) to be attached to are provided at each of at least a pair of side edges facing each other in the longitudinal direction of an upper case (2). When the upper case (2) is attached to the member to be attached to, a gap is provided between the bottom surface of a lower case (3) and the surface of the member to be attached to on the bottom surface side of the lower case (3).

Description

Circuit board unit support structure

The present invention relates to a support structure for a circuit board unit that is mounted and supported in a vehicle or the like and has a long circuit board.

A conventional circuit board unit support structure is, for example, provided along the vehicle width direction inside the instrument panel of a vehicle, and has a large number of interiors in which an upper case and a lower case extending in the vehicle width direction are joined. A bundle of electric wires and a circuit board are arranged so that the circuit board has a large number of conductor patterns that allow a current lower than that of the electric wires to flow (see, for example, Patent Document 1).
JP 2006-44587 A (page 2-6, full view)

However, in the prior art, for example, when the circuit board unit is attached to and supported by a member to be mounted on the vehicle side, distortion of the circuit board unit caused by an external force generated when the vehicle is running affects the circuit board. There was a problem such as. For this reason, stress is applied to the solder portion of the circuit board, which is very undesirable.

The present invention has been made paying attention to the above-mentioned problems, and the object of the present invention is to provide a circuit board unit support structure that can reduce adverse effects on the circuit board due to external force applied to the circuit board unit. Is to provide.

In order to achieve the above object, according to the present invention, in a support structure for a circuit board unit supported by a member to be mounted in a state where the circuit board is accommodated in a space formed by the upper case and the lower case, The lower case and the lower case are provided with engaging portions for connecting and integrating the cases, and the circuit board unit is attached to each of the pair of edge portions facing at least the longitudinal direction of the upper case. When mounting the upper case to the mounted member, a gap was formed between the bottom of the lower case and the lower case bottom surface of the mounted member. It is characterized by.

Therefore, in the present invention, the external force to the circuit board unit can be made less likely to affect the circuit board.

It is a description perspective view which shows the vehicle assembly state of the circuit board unit of Example 1 which concerns on this invention. It is a side view which shows the vehicle assembly state of the circuit board unit of Example 1. FIG. 1 is a perspective view of a circuit board unit according to Embodiment 1. FIG. It is a perspective view which shows the decomposition | disassembly state of the circuit board unit of Example 1. FIG. It is a perspective view which shows the lower surface side part which abbreviate | omitted some screws of the circuit board unit of Example 1. FIG. 2 is a cross-sectional view of a circuit board unit according to Embodiment 1. FIG. FIG. 3 is a cross-sectional perspective view of the circuit board unit according to the first embodiment. FIG. 3 is a plan view of a lower case of the circuit board unit according to the first embodiment. FIG. 3 is a partially enlarged perspective view of a lower case of the circuit board unit according to the first embodiment. FIG. 3 is a partially enlarged perspective view of a lower case of the circuit board unit according to the first embodiment. 3 is an enlarged perspective view of a triangular rib portion of the circuit board unit according to Embodiment 1. FIG. It is a perspective view which shows the lower case of the circuit board unit of Example 1, and the attachment structure of a circuit board. It is an enlarged view of the engagement structure of the engagement claw part of the upper case of the circuit board unit of Example 1, and the engagement part of a lower case. It is an exploded view which shows the state before the assembly | attachment of the circuit board unit of Example 1. FIG. It is an exploded view which shows the state before the assembly | attachment of an upper case and a lower case. It is a figure which shows the fastening state of the engaging claw part of the upper case of the circuit board unit of Example 1, and the engaging part of a lower case. FIG. 3 is a perspective view illustrating a lower surface side portion of the circuit board unit according to the first embodiment. It is a partially expanded bottom view of the screw receiving part of the upper case. FIG. 6 is a partially enlarged front view of a screw receiving portion of the upper case. It is a partially expanded front view of the part of the screwing part of a lower case. It is a partially expanded bottom view of the part of the screwing part of a lower case. FIG. 3 is a partially enlarged view of a fastening portion between the upper case and the lower case of the circuit board unit according to the first embodiment. FIG. 3 is a partially enlarged cross-sectional view of a fastening portion of the upper case and the lower case of the circuit board unit according to the first embodiment. It is a figure which shows the carrying-in state for the mounting to the vehicle of the cockpit module to which the circuit board unit of Example 1 was attached. It is a figure which shows the cantilever state of the circuit board unit produced during the operation | work which assembles the circuit board unit of Example 1. FIG. It is a figure of the twisted state of the circuit board unit of Example 1. FIG. It is an expansion perspective view which shows the unpreferable example of the fastening structure of an upper case and a lower case. It is a figure which shows the state without the urethane material in the state which attached the circuit board unit of Example 1 to the cross car beam. It is a figure which shows the state which attached the circuit board unit of Example 1 to the cross car beam, and attached the urethane material. It is a figure which shows the transmission state of the load in the support structure of the circuit board unit of Example 1. FIG. FIG. 5 is a diagram showing a state of transmission of a load when the lower case receives a load in an unfavorable support structure in which the lower case is attached to the cross car beam, unlike the first embodiment. It is a figure which shows the state which attached the harness which is a bundle of electric wires to the circuit board unit of Example 1. FIG. It is a description perspective view which shows the vehicle assembly state of the circuit board unit of Example 2 which concerns on this invention. It is a figure which shows the vehicle assembly state of the circuit board unit of Example 2. FIG. 6 is a perspective view of a circuit board unit according to Embodiment 2. FIG. It is a perspective view which shows the decomposition | disassembly state of the circuit board unit of Example 2. FIG. It is the perspective view which looked at the upper case of the circuit board unit of Example 2 from the lower part. 6 is a plan view of an upper case of a circuit board unit according to Embodiment 2. FIG. 6 is a bottom view of an upper case of a circuit board unit according to Embodiment 2. FIG. It is an expanded sectional view of the mounting rib part of the upper case of the circuit board unit of Example 2. It is an enlarged side view of the stem clip which attaches a harness to the circuit board unit of Example 2. FIG. It is sectional drawing of the stem clip which attaches a harness to the circuit board unit of Example 2. FIG. It is a figure which shows the state which attached the circuit board unit of Example 2 to the cross car beam, and attached the harness to the circuit board unit. It is a figure which shows the state which tries to fix the stem clip which attached the harness to the attachment rib part of the circuit board unit of Example 2. FIG. It is a figure which shows the state which attached the stem clip to the attachment rib part of the circuit board unit of Example 2, and fixed the harness to the attachment rib part. It is a figure which shows the unpreferable example in the case of fixing a harness with respect to the circuit board unit of Example 2. FIG. It is a figure which expands and shows the engaging part of the clip and attachment rib part in the case of the structure of FIG.

DESCRIPTION OF SYMBOLS 1 Circuit board unit 2 Upper case 20 Peripheral side wall part 20a Notch part 20b Wall surface part (engagement recessed part, positional deviation limiting means)
21 Screw receiving portion 21a Screw hole 22 Engaging claw portion (first coupling means)
22a Inclined portion 22b Engagement surface portion 23 Mounting rib portion 24 Mounting portion 25 Mounting portion 26 Cylindrical rib portion (upper clamping portion, second coupling means)
27 Triangular rib portion 27a Rectangular portion 27b Triangular portion 27c Lower end portion 28 Reinforcing structure portion (reinforcing means)
281a to 281k Reinforcement rib (reinforcement means)
282a to 282n Reinforcement rib (reinforcement means)
283a-283m Reinforcement rib (reinforcement means)
284a to 284f Reinforcement rib (reinforcement means)
29 Holding part 3 Lower case 30 Peripheral side wall part 31 Screwing part (engagement convex part, positional deviation limiting means)

31a Overhang portion

31b Seat portion 31c Through hole 32 Engagement portion (first coupling means)

32a cantilever part

32b connection part 33 connector protection part 34 holding part 35 support part (lower clamping part, second coupling means)

35a support part

35b support part 36 positioning pin 37 holding part 4 circuit board

4a circuit board

4b circuit board 4c flat cable 4d connector 41 positioning hole 42 long hole 5 screw (second coupling means)
6 Urethane material (buffer material)
7 Stem clip 50 Cross car beam (attached member)
51 Cockpit module 60 Screw receiving part 61a Slot 61 Screw fixing part 62 Screw 71 Harness mounting part 72 Umbrella part 73 Insertion part 74 Shaft part 101 Harness 102 (Indicating transmission of load of wire bundle) Line A Gap B Non-relative Surface C Relative surface P (Overlapping with the cross car beam) Range t (Indicates the thickness of the mounting rib portion) Dimension h1 (Indicates the standing length of the mounting rib portion) Dimension h2 (From the relative surface C to the mounting rib portion Dimension h3 (indicates the distance from the lower end of the harness to the relative surface C) dimension

Hereinafter, an embodiment for realizing a circuit board unit support structure of the present invention will be described with reference to the accompanying drawings.

First, the structure of the circuit board unit support structure according to the first embodiment of the present invention will be described.
FIG. 1 is an explanatory perspective view showing an assembled state of the circuit board unit according to the first embodiment to a vehicle-side attached member. FIG. 2 is a bottom view showing a vehicle assembly state of the circuit board unit according to the first embodiment.

As shown in the figure, the circuit board unit 1 according to the first embodiment is attached to a cross car beam 50 arranged in the vehicle width direction inside the installation panel to constitute a cockpit module. . The cockpit module is assembled in advance and mounted on the vehicle body at once. The circuit board unit 1 is responsible for part of the power supply wiring and signal wiring in the left-right direction of the vehicle. Also, some electronic components may be mounted. The cross car beam 50 corresponds to the mounted member of the present invention.

FIG. 3 is a perspective view of the circuit board unit 1 according to the first embodiment. FIG. 4 is a perspective view illustrating an exploded state of the circuit board unit 1 according to the first embodiment.
The circuit board unit 1 has a structure in which upper and lower bodies of a resin upper case 2 and a lower case 3 are assembled to each other, and the circuit board 4 is accommodated therein. The circuit board 4 supplies power to various electrical components such as a meter, an audio device, and various switches.

First, the structure of the upper case 2 will be described.
In the upper case 2, a plurality of screw receiving portions 21 for attaching to the lower case 3 by fastening are provided at predetermined intervals along both sides of the upper case 2.
In addition, engaging claw portions 22 for temporary fixing to the lower case 3 are provided alternately to the screw receiving portions 21 at a plurality of locations on both sides of the upper case 2.

Furthermore, on the upper surface of the upper case 2, the upper side is arranged at a plurality of locations along the longitudinal direction at the center position in the longitudinal direction of the vehicle (the width direction of the upper case 2) so as to be attached to other cables and ducts. A protruding mounting rib portion 23 is provided.
Next, tongue-shaped mounting portions 24 extending downward are provided at three locations on the front side (driver seat side) of the upper case 2, and the rear side (front side) is provided at two locations on the rear side of the upper case 2. A plurality of tongue-shaped attachment portions 24 extending to the grill side) are provided. These mounting portions 24 are formed with mounting holes, and are used for mounting the circuit board unit 1 to the cross car beam 50.
Further, at both left and right end portions of the upper case 2, tongue-shaped attachment portions 25 extending in the left and right directions are provided. These mounting portions 25 are also used for mounting the circuit board unit 1 to the cross car beam 50 in which mounting holes are formed.

Next, the structure of the lower case 3 will be described.
The lower case 3 has, on its long side portion, a screw fixing portion 31 that is a portion that is brought into contact with the screw receiving portion 21 of the upper case so as to overlap with the screw receiving portion 21 and fastened with the screw 5. A plurality are provided. The detailed shapes of the screw receiving part 21 and the screwing part 31 will be described later.

Further, at a plurality of locations on the periphery of the lower case 3, the portions corresponding to the engaging claws 22 of the upper case 2 are overcome and hooked by bending the engaging claws 22 of the upper case 2. A plurality of U-shaped (frame-shaped) engaging portions 32 are provided. The detailed shapes and the like of the engagement claw portion 22 and the engagement portion 32 will be described later. The engaging claw portion 22 and the engaging portion 32 correspond to the first coupling means of the present invention. In the first embodiment, the U-shaped engaging portion 32 is shown. However, for example, a cantilever tongue piece is provided in the lower case 3 and a claw portion is provided on the inner side of the upper case 2. Other shapes may be used such as a claw shape, a hole shape, or a shape engaged with a step.

FIG. 5 is a perspective view of the lower surface side of the circuit board unit 1 according to the first embodiment, in which some screws are omitted.
On the left and right sides of the bottom surface of the lower case 3, a plurality of connectors 4d for electrical connection between the accommodated circuit board 4 and the equipment of the cockpit module are provided so as to be exposed downward. The connector 4d is attached to the circuit board 4 in advance and is electrically connected. In FIG. 4, the mounting position of the connector 4d on the

circuit boards

4a and 4b is indicated by a two-dot chain line.
The lower case 3 is integrally provided with a connector protection portion 33 that surrounds the periphery of the connector 4d with a side wall.

On the other hand, as shown in FIG. 4, the circuit board 4 is housed in the lower case 3 and has a structure in which the circuit board 4a and the circuit board 4b separated in the longitudinal direction are connected at the center by a flat cable 4c. .

Next, the holding structure of the circuit board 4 will be described.
FIG. 6 is a cross-sectional view of the circuit board unit according to the first embodiment. FIG. 7 is a cross-sectional perspective view of the circuit board unit according to the first embodiment. FIG. 8 is a plan view of the lower case of the circuit board unit according to the first embodiment. 9 and 10 are partially enlarged perspective views of the lower case of the circuit board unit according to the first embodiment. FIG. 11 is an explanatory perspective view of a triangular rib portion of the circuit board unit according to the first embodiment.

In the holding structure of the circuit board 4, the holding parts 34 that are one step higher than the bottom part on the center side of the lower case 3 are provided at a plurality of positions at the positions of the lower case 3 corresponding to both ends of the circuit board 4 in the short direction. It is done. As shown in FIGS. 8 to 11, a part of the plurality of holding portions 34 is arranged at a position corresponding to the screwing portion 31, that is, an inner position of the screwing portion 31. Thereby, a part of them is further arranged at a position corresponding to the connector 4d.

As shown in FIGS. 6 and 7, support portions 35 that support the lower surface of the circuit board 4 at substantially the same height as the holding portions 34 are provided at a plurality of locations on the bottom portion on the center side of the lower case 3. In addition, the support part 35 is corresponded to the lower side clamping part of this invention.
And through-hole is formed in a part of support part 35, and it has a structure where the head of screw 5 sits in the state where screw 5 penetrates the screw part (this is called support part 35b. Will be described later).
As a result, when the circuit board 4 is placed on the lower case 3, as shown in FIG. 6, the circuit board 4 is supported at both ends in the short width direction from below by the holding parts 34, and the central part is supported by the support part. 35 is supported from below.

On the other hand, the upper case 2 is provided with a cylindrical rib portion 26 at a position overlapping the support portion 35b. The cylindrical rib portion 26 has a substantially cylindrical shape and has a screw hole (not shown) on the lower end side, and the lower surface of the cylindrical rib portion 26 is brought into contact with the circuit board 4 when the screw 5 is fastened. In addition, the cylindrical rib part 26 is corresponded to the upper side clamping part of this invention. Moreover, the cylindrical rib part 26, the support part 35, and the screw 5 which fastens these correspond to the 2nd coupling means of this invention.

Further, triangular rib portions 27 are provided at positions corresponding to both ends of the circuit board 4 in the short direction. The triangular rib portion 27 is set so that the lower end thereof is strongly pressed against the circuit board 4 by fastening the screws in the cylindrical rib portion 26 and the support portion 35.
In this way, the circuit board 4 is held so as to be sandwiched between the upper cylindrical rib portion 26, the triangular rib portion 27, the lower holding portion 34, and the support portion 35.

As shown in FIG. 11, the triangular rib portion 27 includes a rectangular portion 27a, a triangular portion 27b, and a lower end portion 27c. The lower end portion 27c has a short side direction and a long side direction of the circuit board unit 1 as it goes downward. The tapered surfaces are inclined in four directions so as to be shorter, and the contact area with the circuit board 4 is reduced.
The triangular rib portion 27 has a dimensional relationship set in advance so that the lower end portion 27c is always brought into contact with and pressed against the circuit board 4 by fastening the screws in the cylindrical rib portion 26 and the support portion 35.

Next, the holding structure for the circuit board 4 will be described in more detail.
FIG. 12 is an explanatory diagram illustrating a mounting structure of the circuit board unit lower case and the circuit board according to the first embodiment. In addition, the triangular rib part 27 is shown in part. In addition, although the circuit board 4b is shown in FIG. 12, the circuit board 4a has the same structure.

A plurality of support portions 35 (35b) are arranged in the longitudinal direction on the left and right sides of the lower case 3, and the support portions 35 positioned at both ends of the left and right arrangements of the support portions 35 have triangular cross sections. It is displayed as the support part 35a. The positioning pin 36 protrudes upward from the upper surface of the support portion 35a.
And among the said support parts 35, the some support part 35 located between the support parts 35a of the both ends of each arrangement | sequence is made into a circular cross section, and is displayed as the support part 35b. The screw portion of the screw 5 protrudes upward from the upper surface of the support portion 35b.

As shown in FIG. 12, the circuit board 4 is provided with a positioning hole 41 for allowing the positioning pin 36 at one central position in the longitudinal direction to pass therethrough. Furthermore, a plurality of long holes 42 for penetrating the positioning pins 36 other than the positioning holes 41 and the screw portions of the screws 5 are provided. The long hole 42 has a long hole shape in the longitudinal direction.
In FIG. 11, the triangular rib portion 27 is drawn so as to correspond to one connector 4 d, but the connector 4 d on both sides in the longitudinal direction shown in FIG. 12 (two provided in parallel). Are also arranged correspondingly.

Next, the engagement structure of the engagement claw portion 22 of the upper case 2 and the engagement portion 32 of the lower case 3 of the circuit board unit 1 according to the first embodiment will be described in detail.
As shown in FIG. 13, the engaging claw portion 22 of the upper case 2 has left and right convex portions 22 c that are long and protrude outward. As shown in FIG. 6, the engaging claw portion 22 is provided with an inclined portion 22 a that is inclined so that the engaging portion 32 can easily ride on the engaging claw portion 22. Further, the upper surface is flat and has a stepped shape with a corner to form the engaging surface portion 22b, so that the engaging portion 32 is securely hooked.

The engaging part 32 of the lower case 3 is provided with a cantilevered portion 32a having a lower end as a base end and extending upward on the left and right sides, and the upper ends on the left and right sides are connected with a connecting portion 32b to form a U-shape. . The connection portion 32 b has a shape that engages with the engagement claw portion 22.
In the engaged state in which the engagement surface portion 22b of the engagement claw portion 22 and the connection portion 32b of the engagement portion 32 come into contact with each other, the cylindrical rib portion 26 of the upper case 2 and the circuit board 4 or the upper case 2 The screw receiving part 21 and the screwing part 31 of the lower case 3 are set in a positional relationship having a predetermined gap. In this engagement state, the triangular rib portion 27 is in a positional relationship for lightly contacting the circuit board 4.

Next, the structure of the screw receiving part 21 of the upper case 2 and the screwing part 31 of the lower case 3 will be described in detail.
FIG. 18 is a bottom view showing a part of the screw receiving portion 21 of the upper case 2 in an enlarged manner. FIG. 19 is a partially enlarged front view of a portion of the screw receiving portion 21 of the upper case 2 when the upper case 2 shown in FIG. 18 is viewed from above. FIG. 20 is a partially enlarged front view of the screw fixing portion 31 of the lower case 3. FIG. 21 is a partially enlarged bottom view of the portion of the screw fixing portion 31 of the lower case 3.

First, the upper case 2 side will be described. As shown in FIGS. 18 and 19, the screw receiving portion 21 of the upper case 2 has a structure in which the screw receiving portion 21 partially protrudes laterally from a cutout portion 20 a obtained by cutting out the peripheral side wall portion 20. As shown in FIG. 19, the screw receiving portion 21 is provided in the cutout portion 20 a, so that the receiving surface is positioned above the lower end of the peripheral side wall portion 20.
In addition, the peripheral side wall part 20 of the part provided with the notch part 20a is made into the wall surface 21b substantially perpendicular | vertical to an up-down direction and a near side direction.
The screw receiving portion 21 is provided with an internal screw hole 21a. In the first embodiment, the screw hole 21a has a structure in which the lower part penetrates and the upper part does not penetrate, so that water droplets from above are not directed to the inside.

On the other hand, as shown in FIG. 20 and FIG. 21, the lower case 3 constitutes a recess that accommodates the circuit board 4 on the upper surface side by the peripheral side wall portion 30 that is the peripheral side wall. When the circuit board 4 is accommodated, the peripheral side wall portion 30 has a structure positioned in a frame shape on the outer peripheral side of the circuit board 4. Screw fixing portions 31 for attachment to the upper case 2 are provided at a plurality of locations on the peripheral side wall portion 30 of the lower case 3 at locations corresponding to the screw receiving portions 21 of the upper case 2. The screwing portion 31 is provided so as to protrude further from the peripheral side wall portion 30 to the outer peripheral side.

The screwing portion 31 is formed in a shape having a protruding portion 31a that protrudes outward in a straight line. And it has the structure which provides the through-hole 31c through which the screw | thread 5 penetrates the seat part 31b of the circular recessed part from which the screw head of the screw 5 for fastening seats with a washer from the bottom face.
The overhanging portion 31a has a wall surface that is substantially perpendicular to the vertical direction and the forward direction. However, the draft of the mold is allowed.

Next, the attachment structure of the upper case 2 and the lower case 3 will be described.
FIG. 22 is a partially enlarged explanatory view of a fastening portion of the upper case 2 and the lower case 3 of the circuit board unit 1 according to the first embodiment. FIG. 23 is a partially enlarged cross-sectional view of a fastening portion between the upper case 2 and the lower case 3 of the circuit board unit 1 according to the first embodiment.

Here, as shown in FIGS. 22 and 23, the fastening portion between the upper case 2 and the lower case 3 is formed in the notch portion 20 a of the peripheral side wall portion 20 of the upper case 2, and the screwing portion of the lower case 3. 31 is inserted in the vertical direction. Then, the upper case 2 and the lower case 3 are fastened by attaching a washer to the head with a screw 5 from below.

The fastened screw 5 and the washer engage with the screw fixing portion 31 of the lower case 3 together with the washer, and the screw portion is screwed into the screw hole 21 a of the screw receiving portion 21 of the upper case 2. As a result, the upper surface of the screw fixing portion 31 of the lower case 3 comes into contact with and adheres to the bottom surface of the screw receiving portion 21 of the upper case 2. In this state, the wall surface portion 20b of the peripheral side wall portion 20 of the upper case 2 and the protruding portion 31a of the screwing portion 31 of the lower case 3 face each other with a predetermined gap as shown in FIG. It has become. The screwing portion 31 corresponds to the engaging convex portion of the present invention, and the wall surface portion 20b of the peripheral side wall portion 20 of the upper case 2 corresponds to the engaging concave portion of the present invention. Further, the engaging convex portion and the engaging concave portion correspond to the positional deviation limiting means of the present invention.

In the fastening structure of the upper case 2 and the lower case 3, as shown in FIG. 5, in the portion that is the end in the left-right direction, of the protruding portion 31 a of the screwing portion 31 of the lower case 3, The protruding portion 31a on the end side is formed to extend obliquely with respect to the front direction.
Then, the size and shape of the cutout portion 20a of the peripheral side wall portion 20 of the upper case 2 at a location corresponding to this are also formed into a shape that is cut obliquely. Thereby, the wall surface portion 20b at this position has an inclined shape.
In other words, on the bottom surface of the circuit board unit 1, the overhanging portion 31a and the wall surface portion 20b at the four corners are inclined like a C-chamfered shape.

The upper case 2 and the lower case 3 assembled together as described above are assembled to the cross car beam 50. In this case, as shown in FIG. 29, the lower surface of the lower case 3 is assembled. In the gap A between the cross car beam 50, a urethane material 6 as a buffer member is attached in a plate shape.

Next, the operation of the support structure for the circuit board unit 1 according to the first embodiment will be described.
[Cockpit module power distribution and wiring]
As shown in FIG. 24, the circuit board unit 1 according to the first embodiment is attached to the cross car beam 50 of the cockpit module 51, and transmits and receives power in the left-right direction in the cockpit module 51. For this reason, the interior of the installation panel of the cockpit module 51 is simplified in wiring and has a very space-saving configuration.

Further, as shown in FIG. 3, since a plurality of mounting rib portions 23 are provided in the left-right direction on the upper surface of the circuit board unit 1, the upper surface of the circuit board unit 1 is used, that is, on this upper surface. An electric wire and a signal line are placed and wired in a bundle shape in the left-right direction, and the electric wire and the signal line are fixed to the mounting rib portion 23.
Further, since power is supplied and signal lines are connected from the plurality of connectors 4d provided on the bottom surface of the circuit board unit 1, the interior of the cockpit module installation panel has a very simple wiring structure.

[Action to suppress the influence of external force on the circuit board unit on the circuit board]
The circuit board unit 1 according to the first embodiment has a structure in which the lower case 3 is assembled to the lower side of the upper case 2.
When the circuit board unit 1 is assembled, first, the circuit board 4 (4a, 4b) is placed on the lower case 3 from above. At that time, as shown in FIG. 12, the positioning pins 36 on the upper surface of the lower case 3 pass through the positioning holes 41 and the long holes 42 of the circuit board 4. As a result, the circuit board 4 is accommodated inside the lower case 3 surrounded by the peripheral side wall 30.

In this state, the circuit board 4 is maintained at an upper position from the bottom surface of the lower case 3 by a plurality of points supported by the holding portion 34 and the support portion 35 of the lower case 3. The holding part 34 supports the peripheral edge of the circuit board 4, and the support part 35 supports the center part in the width direction of the circuit board 4. At this time, the connector 4d mounted on the circuit board 4 and protruding downward is protruded downward and outward at a through-hole portion surrounded by the connector protection portion 33 of the lower case 3.
The flat cable 4c (see FIGS. 4 and 14) for electrically connecting the left and right circuit boards 4 (4a, 4b) may be connected in this state or before being placed on the lower case 3. You may go to

Next, the upper case 2 is placed on the lower case 3 from above. In that case, first, an approximate relative position is determined by positioning the engaging portion 32 of the lower case 3 between the convex portions 22c provided on the left and right of the engaging claw portion 22 of the upper case 2 (FIG. 15).
Then, the positions of the engaging claws 22 and the engaging portions 32 are aligned, and the upper case 2 is further brought closer to the lower case 3. Then, the connection portion 32b of the engagement portion 32 gradually climbs on the inclination of the inclined portion 22a of the engagement claw portion 22, and the cantilever portion 32a of the engagement portion 32 bends from the lower end to the base end. become.

Further, when the upper case 2 is moved in a direction to approach the lower case 3, the connecting portion 32b of the engaging portion 32 gets over the engaging claw portion 22. Then, the cantilever part 32a of the engaging part 32 returns to a state without bending due to its elasticity. Therefore, the connection part 32b of the engaging part 32 contacts the engaging surface part 22b of the engaging claw part 22 (see FIG. 13). Therefore, the upper case 2 and the lower case 3 are brought into a temporarily fixed state in which they are engaged so as not to be separated from each other by a predetermined range or more.

In the temporarily fixed state by this engagement, the engagement claw portion 22 is maintained in a predetermined range by the cantilever portion 32a of the engagement portion 32 in the left-right direction.
In this state, the lower surface of the circuit board 4 is supported by the holding portion 34 and the support portion 35, and the position in the left-right direction is limited to a predetermined range by the positioning pins 36. On the upper surface of the circuit board 4, the cylindrical rib portion 26 is positioned at a predetermined gap position in the vertical direction. Further, the triangular rib portion 27 is in a state of lightly contacting the upper end portion of the circuit board 4 and holds the circuit board 4. Thus, in the temporarily fixed state by the engaging claw portion 22 and the engaging portion 32, the circuit board 4 is held at a predetermined range position in the left and right and up and down directions with respect to the upper case 2 and the lower case 3.

Next, the circuit board unit 1 in the temporarily fixed state is inverted upside down so that the lower surface of the lower case 3 faces upward.
Since the circuit board 4 is held in a predetermined range vertically and horizontally, it is similarly held in the predetermined range during and after the inversion.
If reversed, the screw 5 is inserted from above into the screw receiving portion 21 of the upper case 2 through the screw fixing portion 31 of the lower case 3, and the screw receiving portion 21 and the screw fixing portion 31 are fastened.

Similarly, the screw 5 passes through the long hole 42 of the circuit board 4 and is fastened so that the circuit board 4 is sandwiched between the cylindrical rib portion 26 of the upper case 2 and the support portion 35 b of the lower case 3. The fastening of the screw 5 is performed by engaging the engaging claw portion 22 and the engaging portion 32 so that the portion to be fastened is aligned within a predetermined range. 5 may be performed.
Thus, in the circuit board unit 1 of the first embodiment, the fastening direction is only the direction from the lower case 3 to the upper case 2 so that rainwater or the like does not enter the inside through the fastening portion. I have to.

By this fastening, the circuit board 4 is held by being sandwiched between the cylindrical rib portion 26 of the upper case 2, the triangular rib portion 27, the support portion 35 (35 a, 35 b) of the lower case 3, and the holding portion 34.
In addition, after the fastening, the circuit board unit 1 is further inverted to a state shown in FIG. The circuit board unit 1 that has been assembled in this way is attached to the cross car beam 50 of the vehicle.

In this attachment, the circuit board unit 1 is attached to the cross car beam 50 by attaching the

attachment portions

24 and 25 provided in the upper case 2 to the cross car beam 50. 1 and 2, the lower surface of the lower case 3 is in a state of being separated from the cross car beam 50, that is, in a floating state on the support structure.

FIG. 28 is a perspective view showing a state in which the circuit board unit of Example 1 is attached to the cross car beam and there is no urethane material. FIG. 29 is a perspective view illustrating a state in which the circuit board unit 1 according to the first embodiment is attached to the cross car beam 50.

As shown in FIG. 28, the lower surface of the lower case 3 of the circuit board unit 1 floats from the upper surface of the cross car beam 50 due to the support structure, and has a gap A therebetween. In the first embodiment, as shown in FIG. 29, the urethane material 6 as a buffer member is attached in a plate shape to the gap A between the lower surface of the lower case 3 and the cross car beam 50. .

That is, the lower case 3 of the circuit board unit 1 attached to the cross car beam 50 is fastened and assembled to the lower side of the upper case 2. Therefore, the lower case 3 does not support the upper case 2 and the circuit board unit 1. Then, on the upper surface of the circuit board unit 1 attached to the cross car beam 50, on the back side of the circuit board unit 1 shown in FIG. 3 and FIG. 101 is fixed to the circuit board unit 1 at a plurality of locations by the mounting rib portion 23. In addition, it is preferable that the lower part of this harness 101 floats from the upper surface of the upper case 2 and is supported only by the mounting rib part 23.

As described above, in the circuit board unit 1 of the first embodiment, the upper case 2 is attached to the cross car beam 50 of the vehicle with the screws 5 via the

attachment portions

24 and 25 of the upper case 2. The harness 101 is attached to the attachment rib portion 23. Therefore, in the circuit board unit 1 according to the first embodiment, an external force is applied by the work when the vehicle is mounted on the cross car beam 50. Further, the circuit board unit 1 attached to the cross car beam 50 is further subjected to an external force as the harness 101 is attached.

Therefore, as shown in FIG. 30, the load of the circuit board unit according to the first embodiment is transmitted to the upper case 2 that supports the circuit board unit 1 as indicated by

arrows

102 and 102. However, this load is not transmitted to the circuit board 4 and the lower case 3. In addition, external force in the work for attaching the

attachment portions

24 and 25 of the upper case 2 to the cross car beam 50 is also applied to the upper case 2 but is not transmitted to the lower case 3 and the circuit board 4.

As described above, in the circuit board unit 1 according to the first embodiment, the lower case 3 does not support the harness 101 and is attached to the lower case 2 attached to the cross car beam 50 by the

attachment portions

24 and 25. By adopting a structure in which the lower case 3 is assembled, the external force is not transmitted to the circuit board unit 1 and is not affected by the external force. The circuit board unit 1 is provided with a urethane material 6 between the lower case 3 and the cross car beam 50 as shown in FIG. 29, but there is no transmission of load between them, and vibration or deformation causes them. Direct contact is made so as not to generate wear or low-level sounds.

In order to clarify the operation of the circuit board unit 1 according to the first embodiment, further explanation will be added.
FIG. 31 shows a structure for attaching the lower case 3 to the cross car beam 50 by the lower case 3, unlike the present invention. In this case, when the harness 101 is attached to the upper case 2, the load is first received by the upper case 2 as indicated by an arrow 102. The load is deformed so as to push a part of the circuit board 4 downward by the cylindrical rib portion 26 protruding downward from the lower surface of the upper case 2. This is very undesirable. This is because the circuit board 4 has a portion that is weaker to stress or the like than the structure portion, such as a solder portion or a current-carrying pattern, and therefore it is very unpreferable that the load for supporting the harness 101 is transmitted. .

Further, since a part of the lower case 3 that directly accommodates the circuit board 4 is attached to the cross car beam 50, the external force during the work is similarly transmitted to the circuit board 4.
In this case, the cylindrical rib portion 26 cannot be fastened to the circuit board, but details thereof will be described later. Further, even if the cylindrical rib portion 26 is not provided, the stress generated by the lower case 3 supporting the load or the transmission of the force affects the circuit board 4.

On the other hand, in the circuit board unit 1 of the first embodiment, as shown in FIGS. 29 and 30, the lower case 3 of the circuit board unit 1 to which the harness 101 is attached is changed to the upper case 2 and the support structure of the harness 101 is provided. Since it is structured to be assembled without bearing, external force generated when the circuit board unit 1 is attached to the cross car beam 50 and load due to supporting the harness 101 are not transmitted to the circuit board 4. It has become.

In other words, in the circuit board unit 1 of the first embodiment, the circuit board 4 is held so as to be sandwiched between the cylindrical rib portion 26 and the support portion 35 by fastening the screw 5 from below. Thus, by providing a gap between the lower surface of the lower case 3 and the cross car beam 50, the lower surface of the lower case 3 and the cross car beam 50 come into contact with each other by vibration of the vehicle in the gap. The generation of low-pitched sounds caused by repeating is prevented.
In addition, since the circuit board itself is sandwiched and held by the resin member, the resistance to abrasion, deformation, etc. is improved due to its elasticity against vibrations, etc., compared to directly fixing with the metal member. Become.

The circuit board 4 fastening and holding structure of the circuit board unit 1 according to the first embodiment is preferable for the circuit board 4 as described above, and the upper case 2 is attached to the cross car beam 50 by the

attachment portions

24 and 25. Therefore, the lower case 3 is mounted on the lower side of the upper case 2 without assuming the support structure of the harness 101, thereby reducing the adverse effect of the external force on the circuit board unit. . If this fastening and holding structure is performed with the structure of FIG. 31, the load of the harness 101 is transmitted to the circuit board 4 with a higher distribution, and the circuit board unit 1 is more greatly adversely affected by the external force. End up.

In the circuit board unit 1 of the first embodiment, as described above, the lower case 3 accommodates the circuit board 4, but the upper case 2 and the load of the harness 101 are not subjected to the upper case.・ Thickness can be made thinner than case 2. Since the lower case 3 is a longitudinal resin molding as shown in FIG. 3 and the like, the molding operation can be performed satisfactorily by reducing the thickness. This can contribute to product accuracy improvement and cost reduction.

Furthermore, in Example 1, the following actions can be obtained.
In the circuit board unit 1 of the first embodiment, the circuit board 4 functions in place of electric wires for supplying power and sending signals in the left-right direction inside the vehicle installation panel. In this function, when the circuit board 4 is caused to function instead of the shield wire, the energization pattern of the circuit board 4 is set at a predetermined interval along the left and right longitudinal directions of the cross car beam 50 made of a conductive material. In the upper position, a part of the shielding function is obtained.

In the case of the configuration as shown in FIG. 31, it is necessary to obtain sufficient strength to receive external force with the lower case 3, and measures such as increasing the thickness of the lower case 3 are required. However, as the lower case 3 is made thicker, the gap distance between the circuit board 4 and the cross car beam 50 becomes larger. If the gap distance with the cross car beam 50 becomes too large, the shield function of the circuit board 4 becomes very weak.

Also from this point, in the first embodiment, the upper case 2 is attached to the cross car beam 50 by the

attachment portions

24 and 25, and the lower case 3 does not support the load of the harness 101, and the upper -It is advantageous that the structure is attached to the lower side of the case 2 and can be thin in structure and thickness. The gap distance in the shielding function with the cross car beam 50 can be reduced, and the degree of freedom for optimizing the position with respect to the cross car beam 50 is increased.

The cross car beam 50 is a structural member of the cockpit module 51 and has a characteristic that the center is easily bent as a whole. Also in this case, the lower case 3 does not generate a direct contact portion with the unstable cross car beam 50, and the generation of lower sounds is prevented by buffering with the urethane material 6. Also in this respect, it is advantageous that the lower case 3 is located at a position having a gap with respect to the cross car beam 50 and the urethane material 6 can be disposed therebetween.
Although the upper case 2 is affected by the bending of the cross car beam 50, even if the upper case 2 is thickened to increase the strength, some shielding functions, It is also advantageous to be able to perform without problems in terms of suppressing the influence of external force on the circuit board.

Further, in the circuit board unit 1 according to the first embodiment, the connector protection portion 33 is provided on one side of the lower case 3 and the lower surface on the back side in FIGS. 3 and 4, and a plurality of connectors 4d connected to the circuit board 4 are provided outside. It is exposed. In this case, the upper case 2 is attached to the cross car beam 50 by the attaching

portions

24 and 25, and the lower case 3 is assembled to the lower side of the upper case 2 so as not to support the load of the harness 101. Therefore, the degree of freedom of the setting position of the connector 4d is increased, and the connector 4d can be provided at a position that does not overlap the cross car beam 50 vertically.

Thereby, after the circuit board unit 1 is attached to the cross car beam 50, it is easy to connect the connector of the vehicle device to the connector 4d.
Further, in this connection, since the connector of the vehicle device is connected to the connector 4d so as to be inserted from below, a force is applied to the circuit board 4 upward. This force is received by the upper case 2 by the cylindrical rib portion 26 and the triangular rib portion 27 that are disposed relatively close to the connector 4d. Therefore, the lower case 3 is not affected by the connection of the connector and the circuit board 4 is not affected. Supporting the circuit board 4 downward with high strength by the upper case 2 facilitates connector connection work.

[Action to suppress low tone]
FIG. 14 is an explanatory exploded view showing a state before the circuit board unit of Example 1 is assembled. FIG. 15 is an explanatory exploded view showing a state before the upper case 2 and the lower case 3 are assembled. FIG. 16 is an engagement claw portion 22 and a lower case of the upper case 2 of the circuit board unit of the first embodiment. It is explanatory drawing which shows the fastening state of 3 engaging parts. FIG. 17 is a bottom perspective view of the circuit board unit 1 according to the first embodiment.

First, in order to assemble the upper case 2 and the lower case 3, as shown in FIG. 6, the upper case 2 and the lower case 3 are initially engaged and temporarily fixed as shown in FIG. The screw receiving portion 21 and the screwing portion 31 have a predetermined gap, and the cylindrical rib portion 26 and the circuit board 4 have a predetermined gap in the vertical direction with respect to the circuit board 4. Therefore, the triangular rib portion 27 and the circuit board 4 are in a light contact state. In the state where the upper case 2 and the lower case 3 are fastened as the second joined state, the screw receiving part 21 and the screwing part 31, and the circuit board 4 and the rib part 26 are fastened by the screw 5. It comes into contact and pressed. And the circuit board 4 and the triangular rib part 27 will be in the state pressed strongly. Since the lower end portion 27c of the triangular rib portion 27 has a shape that allows elastic deformation, strong pressing is permitted.

Therefore, as shown in FIG. 16, the engagement surface portion 21b of the engagement claw portion 22 of the upper case 2 and the connection portion 32b of the engagement portion 32 of the lower case 3 are disengaged temporarily. Thus, a state having a gap D is obtained. Therefore, the engagement claw portion 22 and the connection portion 32b are maintained in a state having a sufficient gap so that they do not come into contact with each other. There is no low-pitched sound produced by repeated contact.

Further, since the rib portion 26 and the triangular rib portion 27 that hold the circuit board 4 are maintained in a state of being elastically pressed against the circuit board 4 in the fastening state, a low-pitched sound that is generated by repeating contact is emitted. There is nothing.

Further, the holding part 34 provided on the lower case 3 and supporting the lower surface of the circuit board 4 is provided with a part inside the screwing part 31 of the lower case 3. Then, by being in the vicinity of the fastening portion, the fastening force can be sufficiently obtained and the circuit board 4 is pressed against the rib portion 26 and the triangular rib portion 27 more strongly. For this reason, a gap is generated between the holding portion 34 and the circuit board 4, and it is more reliably prevented that low-order sounds are generated by repeated contact.

In addition, a part of the holding portion 34 is also disposed in the vicinity of the connector 4 d of the circuit board 4. As a result, the substrate holding force due to the sandwiching between the rib portion 26 and the triangular rib portion 27 is increased in the vicinity of the connector 4d, and the connector insertion and fitting force when connecting the connector of the vehicle device to the connector 4d are sufficiently endurable. A high stress is not generated in the solder portion of the circuit board 4.

[Action to reduce the stress of the circuit board]
FIG. 25 is an explanatory diagram showing a carry-in state for mounting the cockpit module 51 to which the circuit board unit 1 of the first embodiment is attached to a vehicle.
The cockpit module 51 is a module in which, for example, an installation panel, a steering column, a meter, an air conditioning unit, an air conditioning duct, an audio unit, and the like are modularized and mounted on a vehicle body.
When the cockpit module 51 is mounted on the vehicle body, the cockpit module 51 is loaded while holding both ends of the cross car beam 50. Then, the weight of the cockpit module 51 is concentrated in the center of the cross car beam 50, and the cross car beam 50 and thus the circuit board unit 1 is bent in a bow shape.

The circuit board unit 1 accommodates a circuit board 4 therein. Accordingly, the solder joint portion of the circuit board 4 to the connector 4d and the like, and the circuit pattern portion (which are referred to as solder portions) are stronger than the resin of the upper case 2 and the lower case 3 with respect to stress and deflection. Because it is weak, it tends to cause problems. Since the upper case 2 and the lower case 3 are made of resin, they have a certain degree of flexibility.

In this case, in the circuit board unit 1 of the first embodiment, the contact between the bottom surface of the screw receiving portion 21 of the upper case 2 that is fastened and the upper surface of the screw fixing portion 31 of the lower case 3 causes the above-described contact. In response to the stress, the circuit board unit 1 is restrained from bending. However, since this bending is substantially orthogonal to the fastening direction, it is difficult to effectively suppress it with a fastening force. Therefore, with respect to the direction substantially perpendicular to the fastening direction, that is, with respect to the screw receiving portion 21 of the upper case 2, the screwing portion 31 of the lower case 3 moves so as to be displaced outward in the left-right direction, and further bent. Will result.

At this time, in the supporting state in which the distortion exceeds the allowable limit of the distortion value of the solder portion of the circuit board 4, the screwing portion 31 of the lower case 3 is formed in the notch portion 20 a of the peripheral side wall portion 20 of the upper case 2. Therefore, the wall surface portion 20b of the peripheral side wall portion 20 of the upper case 2 and the protruding portion 31a of the screwing portion 31 of the lower case 3 abut on each other in a direction substantially orthogonal to the fastening direction. Thereby, the positional deviation between the upper case 2 and the lower case 3 is limited, and the bending of the circuit board unit 1 is suppressed.

In other words, as shown in FIG. 24, the upper case 2 and the lower case 3 are brought into contact with the stress that causes the circuit board unit 1 to bend due to the weight of the cockpit module 51. In addition to being received by the close contact surface, the upper and lower two body structures of the upper case 2 and the lower case 3 tend to be displaced relative to each other when the deflection is caused. The above-mentioned stress is effectively received because the wall portion 20b of the peripheral side wall portion 20 of the case 2 and the protruding portion 31a of the screwing portion 31 of the lower case 3 are received by contact in the direction in which the upper and lower members are displaced. Increase area and reduce stress. Thereby, the bending of the circuit board unit 1 is further suppressed. Therefore, even if the both ends of the cross car beam 50 are supported when the cockpit module 51 is transported, no trouble occurs.

Further, since the circuit board 4 is configured such that the

circuit boards

4a and 4b are connected by the central flat cable 4c, when the cockpit module 51 is transported, the circuit board 4 is bent at the center position where the bending amount is maximum. Also, the circuit board 4 is prevented from malfunctioning.

This will be described in more detail.
FIG. 25 is a diagram illustrating a cantilever state of the circuit board unit 1 according to the first embodiment.
The circuit board unit 1 of the first embodiment is a longitudinal object that is close to the left and right length of the cockpit module of the vehicle. Therefore, in the process of assembling the circuit board unit 1 or attaching to the cross car beam 50, the circuit board unit 1 may be in a cantilever state in which one end of the circuit board unit 1 is held by an operator's hand or machine. is there. As a result of the operation and reaction thereof, the circuit board unit 1 is bent in the vertical direction as indicated by arrows in FIG.

The point where this bending is not preferable is as described above, and if the work is performed so that this bending does not occur or is not in a cantilever state, work efficiency is reduced and work machine cost is increased. Become.
In the circuit board unit 1 of the first embodiment, the wall surface portion 20b of the peripheral side wall portion 20 of the upper case 2 and the protruding portion 31a of the screwing portion 31 of the lower case 3 are in contact with each other in a direction substantially orthogonal to the fastening direction. As a result, the stress that causes the bending due to the operation, the reaction thereof, and the weight of the circuit board unit 1 is reduced, and the bending is suppressed. Therefore, it is possible to improve the workability without causing a problem.

More specifically, the assembly structure and method of the circuit board unit 1 according to the first embodiment is accommodated in such a manner that the circuit board 4 is placed from above on the inside surrounded by the peripheral side wall portion 30 of the lower case 3 in a frame shape. Then, the upper case 2 is assembled from above the lower case 3 in this state. Since the lower surface of the upper case 2 has a concave portion surrounded by a peripheral side wall portion 20 in a frame shape, the lower case 3 is accommodated therein. At that time, the screwing portion 31 of the lower case 3 is inserted into the cutout portion 20a of the peripheral side wall portion 20 of the upper case 2, and the lower case is inserted into the engaging claw portion 22 of the upper case 2. The three engaging portions 32 are engaged so that temporary fixing is performed.

Then, the temporarily fixed state is turned upside down, and the screw 5 is inserted into the screw fixing portion 31 of the lower case 3 from above, and fastened. When the fastening is completed, the front and back are reversed again, and the circuit board unit 1 is attached to the cross car beam 50 thereafter. Alternatively, when the cable is further assembled to the attachment portion 24 for wiring, it is necessary to perform reversal so that the attachment portion 24 is on the front side. With such an assembly structure, the circuit board unit 1 of the first embodiment takes into consideration the waterproofness of the circuit board 4.

That is, the circuit board 4 is not cut out, and is surrounded by the peripheral side wall 30 of the lower case 3 with the lower end as the base end. It is made to be enclosed by the peripheral side wall part 20 of the upper case 2 used as a base end. As a result, even if water droplets are transmitted through the peripheral side wall portion 20 of the upper case 2, the peripheral side wall portion 30 located on the inner side prevents water droplets or the like from entering the accommodation space of the circuit board 4. Further, the fastening screw 5 for assembling the upper case 2 and the lower case 3 is assembled from the bottom side, and the seating portion 31b of the circular recess of the screwing portion 31 is opened downward, This prevents water droplets from accumulating in this area.

FIG. 26 is an explanatory diagram of a twisted state of the circuit board unit 1 according to the first embodiment. In the figure, each arrow at both ends indicates a twisting direction.
When the circuit board unit 1 of the first embodiment is assembled and then attached, the front and the back are reversed. This reversal causes a torsional stress in the circuit board unit 1. In the case of twisting, the upper case 2 and the lower case 3 tend to be displaced by stress at the ends that are long sides in the longitudinal direction. This displacement is, on the one hand, the upper case 2 extending and the lower case 3 contracting, and on the other hand the opposite. That is, as in the case of bending, the upper case 2 and the lower case 3 tend to be twisted by causing a positional shift in a direction substantially orthogonal to the fastening direction.

The point where this twist is not preferable is the same as in the case of bending as described above. When the reversing operation is performed by adjusting the force and the reversing speed so that this twisting does not occur, the work efficiency is lowered, the work machine This will increase costs.
In the circuit board unit 1 of the first embodiment, the wall surface portion 20b of the peripheral side wall portion 20 of the upper case 2 and the protruding portion 31a of the screwing portion 31 of the lower case 3 are in contact with each other in a direction substantially orthogonal to the fastening direction. As a result, the stress that twists the circuit board unit 1 that occurs during the reversal is reduced and the twist is suppressed, so that no trouble occurs and workability can be improved.

Note that, in order to fasten the upper case 2 and the lower case 3, unlike the first embodiment, a configuration as shown in FIG. In the fastening structure shown in FIG. 27, a screw receiving portion 60 for screwing a screw 62 to be fastened is provided in the upper case 2, and a screw fastening portion 61 for engaging the head of the screw 62 and a washer is provided in the lower case 3. . Furthermore, the screwing portion 61 is provided with a long hole 61a for allowing the screw portion to pass therethrough. The screw receiving portion 60 of the upper case 2 and the screw fixing portion 61 of the lower case 3 are brought into contact with each other, and the screw 62 is fastened from below.

In the fastening structure shown in FIG. 27, a hole (long hole 61a) for penetrating the threaded portion is allowed in order to allow positional displacement in the longitudinal direction at the time of temporarily fastening the upper case 2 and the lower case 3 and fastening. Has a long hole shape.
However, in the fastening structure shown in FIG. 27, the upper case 2 and the lower case 3 tend to be misaligned when the cockpit module 51 is transported, cantilevered or twisted. What is suppressed is only the fastening force in the direction substantially perpendicular to the displacement direction. For this reason, the upper case 2 and the lower case 3 are displaced relative to each other depending on the magnitude of the stress, resulting in problems due to bending and twisting.

On the other hand, in the first embodiment, when the upper case 2 and the lower case 3 are assembled, the screwing portion 31 of the lower case 3 is inserted into the notch 20a of the peripheral side wall portion 20 of the upper case 2. To do. As a result, the longitudinal positioning of the upper case 2 and the lower case 3 is temporarily performed. Then, the engagement claw portion 22 of the upper case 2 is engaged with the engagement portion 32 of the lower case 3 to perform temporary fixing. In the engagement between the engagement claw portion 22 and the engagement portion 32, a dimension and a size that allow a positional shift in the longitudinal direction may be used.

With the fastening structure that also serves as the temporary fixing structure, in the circuit board unit 1 according to the first embodiment, when the upper case 2 and the lower case 3 are fastened with screws, there is no positional displacement in the longitudinal direction. Therefore, unlike the fastening structure shown in FIG. 27, there is no need for a configuration like a long hole provided with a dimension that allows a deviation at the time of fastening.
In the first embodiment, the structure for performing temporary fixing in this manner allows the wall surface portion 20b of the notched portion 20a of the peripheral side wall portion 20 of the upper case 2 and the protruding portion 31a of the screw fixing portion 31 of the lower case 3 to be provided. Can be narrowed. This is advantageous in that the stress can be reduced by contacting the wall surface portion 20b and the overhanging portion 31a at an early stage when the stress is generated.

Further, a plurality of wall surface portions 20b and projecting portions 31a of the circuit board unit 1 of the first embodiment are provided, but the four corner portions are inclined like a C chamfered shape as shown in FIG. Even when subjected to stress that bends obliquely with respect to the direction, the stress can be reduced by having a portion that is in contact with the direction.

Further, in the circuit board unit 1 of the first embodiment, in comparison between the upper case 2 and the lower case 3, the upper case 2 is replaced with the cockpit module 51 from the lower case 3 that directly accommodates the circuit board 4. It is easy to bend in the direction of bending due to its own weight. That is, while the lower case 3 has a peripheral side wall portion 30 without a notch, the upper case 2 is provided with a notch portion 20a on the peripheral side wall portion 20 so that the notch portion 20a is easily bent. . Thereby, consideration is given to the fact that the upper case 2 absorbs stress by being greatly deflected as compared with the lower case 3 so that these two-body structures do not increase the stress of the circuit board 4.

Next, the effect of the support structure for the circuit board unit according to the first embodiment will be described.
In the support structure for the circuit board unit according to the first embodiment, the following effects can be obtained.

(1) In the support structure of the circuit board unit 1 that accommodates the circuit board 4 in the space formed by the upper case 2 and the lower case 3, the upper case 2 and the lower case 3 include the case 2, A pair of edge portions that are provided at least in the longitudinal direction of the upper case 2, and are provided with an engaging claw portion 22 and an engaging portion 32 for integrally connecting the upper case 2 and the screw receiving portion 21 and the screwing portion 31. Are provided with attachment portions 25 for attaching the circuit board unit 1 to the cross car beam 50. When the upper case 2 is attached to the cross car beam 50, the bottom surface of the lower case 3 and this Since a gap is provided between the cross car beam 50 on the bottom surface side, external force to the circuit board unit 1 can be made less likely to affect the circuit board. The

(2) a cylindrical rib portion 26 provided on the upper case 2 with the lower surface close to the circuit board 4; a support portion 35 provided on the lower case 3 with the upper surface close to the circuit board 4; Since the screw 5 for fastening the cylindrical rib portion 26 and the support portion 35 is provided, and the central portion in the short direction of the circuit board 4 is sandwiched between the cylindrical rib portion 26 and the support portion 35, the circuit board 4 generates low-pitched sounds. It can be held well without any problems.

(3) When the circuit board unit 1 is attached to the cross car beam 50, a cushioning member such as the urethane material 6 is provided in the gap between the lower case 3 and the cross car beam 50. Even if the case 3 and the cross car beam 50 are bent by an external force, they may be brought into direct contact with each other so that lower sound or wear is not generated or external force is not received from the cross car beam 50 side. it can.

(4) The lower case 3 is assembled to the lower side of the upper case 2 by fastening the upper case 2 and the lower case 3 at a plurality of locations. The fastening of the plurality of locations and the fastening of the cylindrical rib portion 26 and the support portion 35 are for screwing the screw 5 upward from below, so that water does not enter the circuit board 4 from the screw 5 portion. it can.

(5) The circuit board unit 1 is attached to the vehicle body side of the vehicle. The

attachment portions

24 and 25 attach the circuit board unit 1 to the cross car beam 50 of the vehicle body, and the upper case 2 has a longitudinal shape. Since the mounting rib portion 23 for supporting the vehicle harness 101 extending in the direction is provided, power and signals can be transmitted and received in the left and right directions of the vehicle in a small space. It is possible to prevent the substrate 4 from being affected.

(6) Since the connector 4d provided on the circuit board 4 and electrically connecting the circuit board 4 and the vehicle device is exposed downward by the connector protection part 33 on the lower surface of the lower case 3, the upper case 3 Due to the assembly structure to the case 2, connection work can be performed at a position where it does not overlap the cross car beam 50, and the insertion force when connecting this connector is that the upper case 2 has the cylindrical rib portion 26 and the triangular rib portion 27. Can be received at.

(7) In the circuit board unit 1 for accommodating the long circuit board 4 in the space formed by the upper case 2 and the lower case 3, the upper case 2 and the lower case 3 are combined and the upper case 2 and the lower case 3, the circuit board 4 is coupled by engagement by an engagement claw part 22 and an engagement part 32 that hold the circuit board 4 so as to be sandwiched in a predetermined position range, and the circuit board 4 is connected to the upper case 2 and the lower case 3. The first coupling means to be temporarily fixed to the upper part, the cylindrical rib part 26 of the upper case 2 that is coupled more firmly than the coupling by the first coupling means, the support part 35 of the lower case 3, and these are fastened. A second coupling means constituted by a screw 5, and in the coupling by fastening by the second coupling means, the coupling of the first coupling means (the engaging portion 32 is pulled to the engaging claw portion 22) at the time of this coupling. A structure in which the upper case 2 and the lower case 3 are not separated from each other by being hung (releasing the engagement portions of the engaging claw portion 22 and the engaging portion 32 and releasing the engagement). For this reason, it is possible to prevent the engagement portion of the first coupling means from coming into contact repeatedly due to vibrations, and to suppress the generation of lower sounds.

(8) The first coupling means also serves to align the upper case 2 and the lower case 3 for fastening the second coupling means. Therefore, after the first coupling means is fastened, the second coupling means is fastened. At this time, since no special alignment work is required, the circuit board unit 1 can be assembled with less work. This contributes to work efficiency and cost.

(9) Provided at a position higher than the lower surface of the lower case 3 and supporting the lower surface of the lower case 3 that supports the lower surface of the peripheral edge of the circuit board 4, and provided at the same height as the holding

part

34, 4 is provided so as to protrude downward from the lower surface of the upper case 2 and to support the lower surface of the fastening hole 42 at the center of the upper surface of the circuit board 4. The upper case 2 is provided with an adjacent triangular rib portion 27 and a cylindrical rib portion 26 that protrudes downward from the lower surface of the upper case 2 and abuts or approaches the upper surface position that overlaps the support portion 35b of the circuit board 4. The engagement between the engagement claw portion 22 and the engagement portion 32 of the lower case 3 is defined as a first coupling. In this first coupled state, the triangular rib portion 27 abuts on the circuit board 4 and the triangular rib portion 27 , The holding part 34, the support part 35b in the circuit While the plate 4 is held in between, the upper case 2 and the lower case 3 are fastened and at least the support portion 35b and the cylindrical rib portion 26 are fastened as a second joint. Then, the support part 35b and the cylindrical rib part 26 hold | maintain so that the circuit board 4 may be pinched | interposed by fastening, and the triangular rib part 27 will be in the state pressed more strongly by the circuit board 4 than the 1st coupling state. For this reason, the structural part holding the circuit board 4 that can be fastened by reversing the entire circuit board unit 1 while maintaining the above-mentioned engaged state inside the circuit board unit 1 repeatedly makes contact with vibration. The generation of lower sounds can be suppressed by sufficiently pressing so as not to be in a positional relationship for generating sounds.

(10) In the circuit board unit 1 in which the long circuit board 4 having the solder portion is accommodated in the space formed by the upper case 2 and the lower case 3 and is flexible at least in the longitudinal direction, A plurality of peripheral edges of the case 2 are provided at intervals and at least along the longitudinal direction of the circuit board. The notch 20a and the screw receiving part 21 of the peripheral side wall 20 and the other edge of the lower case 3 And a screwing portion 31 provided so as to be paired with the cutout portion 20a of the peripheral side wall portion 20 and the screw receiving portion 21, and a wall surface portion 20b of the cutout portion 20a of the peripheral side wall portion 20 and the screwing portion. The protruding portion 31a of the circuit board 4 is opposed to each other in a state where a part thereof is separated in the longitudinal direction of the circuit board 4, is separated in a state where it is horizontally supported, and is soldered in a supporting state that causes bending. In order to make contact within a range that does not exceed the allowable limit of the strain value, the circuit board 4 is configured so as to prevent the upper case 2 and the lower case 3 from being displaced during the assembly process or transport in the factory. It is possible to reduce the stress on the solder, the electrical connection portion, etc., and to prevent the occurrence of problems.

(11) Since the supporting state causing the bending is at least a cantilevered supporting state, if the bending due to its own weight due to the cantilevered supporting state or the bending due to the reaction due to the cantilevered state is to occur, the peripheral side wall 20 is notched. Since the wall surface portion 20b of the portion 20a and the protruding portion 31a of the screwing portion 31 are in contact with each other and the displacement is suppressed, for example, even if the cantilever is supported in the manufacturing process, It is possible to reduce the stress and prevent the occurrence of problems.

(12) The screwing portion 31 includes a seating portion 31b that receives the head of the screw 5 and a through hole 31c that penetrates the screwing portion. The screwing portion 31 is provided on the cutout portion 20a and the screw receiving portion 21 of the peripheral side wall portion 20. And the upper case 2 and the lower case 3 are assembled to each other, and the engagement between the notch portion 20a of the peripheral side wall portion 20 and the screw receiving portion 21 and the screw fixing portion 31 is performed. Since it is used as a means for restricting the positional displacement of the upper case 2 and the lower case 3 in the longitudinal direction before and during fastening, the front and back of the assembled upper case 2 and lower case 3 are reversed before fastening. The position of the wall portion 20b and the overhanging portion 31a is limited to be within a predetermined size by restricting the positions of the portions so as not to be shifted at the time of fastening or fastening. Thereby, the stress reduction action can act reliably. Further, by combining this stress mitigating action at the fastening portion, the structure is simplified, and the stress can be mitigated without increasing the cost.

(13) A frame-shaped peripheral side wall portion 20 that protrudes downward and accommodates the lower case 3 inside is provided at the peripheral edge of the bottom surface of the upper case 2, and the peripheral side wall portion 20 is formed as a notch notch portion 20 a at a plurality of locations. Since the screw receiving portion 21 to which the screw portion of the screw 5 is screwed is provided at the notched position, the screw retaining portion 31 that is aligned with the screw receiving portion 21 and receives the head of the screw has a peripheral edge of the notched portion 20a. By engaging with the wall surface portion 20 b of the side wall portion 20, the stress reducing action is performed, and the side of the upper case 2 for performing the stress reducing action is the peripheral side wall portion 20 for housing the lower case 3. It is possible to reduce stress while reducing costs and saving space.

Further, since the cutout portion 20a is provided in the peripheral side wall portion 20 which is located on the outer side of the peripheral side wall portion 30 of the lower case 3 and protrudes downward, the drop of water drops and the like is improved and the waterproofness of the circuit board 4 is improved. Can be made.
Furthermore, since the notch 20 a is provided in the peripheral side wall 20 of the upper case 2, the upper case 2 is more easily bent than the lower case 3. Therefore, the two-body structure of the upper case 2 and the lower case 3 can be prevented from increasing the stress of the circuit board 4 by largely bending and absorbing the stress as compared with the lower case 3 that directly accommodates the circuit board 4. .

以下 Hereinafter, the support structure of the circuit board unit according to the second embodiment of the present invention will be described with reference to the attached drawings. In addition, the same code | symbol is attached | subjected about the same component as an Example, and those description is abbreviate | omitted.

Hereinafter, the configuration of the support structure for the circuit board unit according to the second embodiment will be described.
FIGS. 32 to 34 are explanatory views showing the vehicle assembly state of the circuit board unit according to the second embodiment. FIG. 35 is a perspective view of the circuit board unit 1 according to the second embodiment. FIG. 36 is a perspective view illustrating an exploded state of the circuit board unit 1 according to the second embodiment.

As shown in the figure, the circuit board unit 1 of the second embodiment has a structure in which the upper and lower bodies of the upper case 2 and the lower case 3 made of resin are assembled in the same manner as the first embodiment. The cockpit module is arranged by being attached to a cross car beam 50 provided inside the installation panel. The cockpit module is assembled in advance and mounted on the vehicle body at once. Therefore, most parts and parts are the same as in the first embodiment, and therefore FIGS. 5 to 11 in the first embodiment are the same in the second embodiment.

Next, the reinforcing structure of the upper case 2 in the second embodiment will be described.
FIG. 37 is a lower perspective view of the upper case 2 of the circuit board unit 1 according to the second embodiment. FIG. 38 is a plan view of the upper case 2 of the circuit board unit 1 according to the second embodiment. FIG. 39 is a bottom view of the upper case 2 of the circuit board unit 1 according to the second embodiment.

The upper case 2 is provided with a reinforcing structure 28 in a range P shown in FIG. The range P is a range that overlaps the cross car beam 50 in the vertical direction when the circuit board unit 1 is attached to the cross car beam 50.
The reinforcing structure 28 of the upper case 2 includes reinforcing ribs 281a to 281k, reinforcing ribs 282a to 282n, reinforcing ribs 283a to 283m, and reinforcing ribs 284a to 284f.

In the upper case 2, the position of the upper surface below the harness 101 that is a bundle of electric wires attached to the attachment rib portion 23 is positioned below the other upper surface of the upper case 2 as shown in FIG. 6. To do. In other words, the upper surface of the upper case 2 is formed to have a step in the short direction with the attachment rib portion 23 as a boundary, and the thickness of the one on which the harness 101 is disposed is reduced. That is, in the range P overlapping with the cross car beam 50, as shown in FIG. As shown in FIG. 37 and FIG. 39, the top surface viewed from the lower side of the increased thickness portion is provided with a rib structure as a reinforcing structure portion 28 as shown in FIG. To.

リブ In this rib structure, as shown in FIG. 37, first, two reinforcing

ribs

281a and 281b parallel to the longitudinal direction are provided on the top surface (bottom surface) viewed from below the upper case 2. Each of these reinforcing

ribs

281a and 281b is a single rib up to both ends. As shown in FIGS. 33 to 36, the upper case 2 draws out a part of the harness 101, which is a bundle of wires supported long in the longitudinal direction, so as to get over the increased thickness portion, and to the vehicle apparatus. Need to connect. For this reason, the part which makes thickness thin is provided in a total of four places, both ends and two places in the middle.

As shown in FIGS. 33 to 36 and 38, the reinforcing ribs 281c to 281c are arranged at four locations on the upper surface of the upper case 2 so that the reinforcing

ribs

281a and 281b are each one in the thinned upper surface portion. 281j is provided. As a result, in the range P of the upper case 2, three single ribs extending from end to end are provided in parallel. Further, although the top surface (bottom surface) viewed from the lower side of the upper case 2 is intermittent, a reinforcing rib 281k that is generally one is provided. The reinforcing ribs 281k are provided in parallel to the reinforcing

ribs

281a and 281b at a position where the cylindrical rib portion 26 is connected.

Next, rib structures that are substantially orthogonal to the two reinforcing ribs 281a to 281j that are parallel to each other in the longitudinal direction are provided on the top surface (bottom surface) of the upper case 2 as viewed from below.
The reinforcing ribs 282a to 282n are extended from end to end in the short direction in the range P where the thickness of the upper case 2 is thick. However, although there is a height in the range P, a shape having a low height is formed on the side overlapping the harness 101 that is a bundle of electric wires.

The reinforcing ribs 284a to 284f are provided at positions perpendicular to the middle of the upper case 2 of the mounting ribs 23 provided at six locations so as to protrude upward from the upper surface of the upper case 2. In addition, the reinforcing ribs 284a to 284f are extended from one end to the other end of the upper case 2 in the same manner as the reinforcing ribs 282a to 282n. As a result, a grid-like rib structure is arranged on the top surface (bottom surface) viewed from below the upper case 2 as shown in FIG. The reinforcing structure 28 having a lattice-like rib structure is provided in the upper case 2 but is not provided in the lower case 3, so that the upper case 2 is less rigid in the longitudinal direction than the lower case 2. It is also higher in the hand direction.

Next, the fixing structure of the harness 101 will be described in detail.
40 is an enlarged cross-sectional view of the mounting rib portion 23 of the upper case 2 of the circuit board unit 1 according to the first embodiment.

As shown in the figure, in the upper case 2, the height of the upper surface (harness arrangement side C) on the side where the harness 101 is attached is made lower than the height of the upper surface (harness non-position side B) where the harness 101 is not attached. As shown in FIG. 46, the portion corresponding to this height difference is a reinforcing structure 28 (range P). Then, as shown in FIG. 40, the base end of the mounting rib portion 23 erected so as to extend upward is the upper surface (the harness non-arranged side surface B) of the reinforcing structure portion 28 having a higher height. Thereby, the standing standing length from the harness non-arrangement side surface B of the mounting rib portion 23 is h1 in FIG. A through hole 231 is provided in a part of the mounting rib portion 23 in the left-right direction from the side to which the harness 101 is attached to the reinforcing structure portion 28 side.

Next, the structure of the stem clip 7 which is a fixture for fixing the harness 101 to the mounting rib portion 23 will be described. The stem clip 7 corresponds to the fixing means and the attaching means of the present invention.
FIG. 41 is an explanatory side view of the stem clip 7 for attaching the harness 101 to the circuit board unit 1 of the second embodiment. FIG. 42 is an explanatory sectional view of the stem clip 7 for attaching the harness 101 to the circuit board unit 1 of the second embodiment.

The heel stem clip 7 includes a harness attachment portion 71, an umbrella portion 72, an insertion portion 73, and a shaft portion 74. The stem clip 7 is made of a material containing an elastic resin such as rubber.

The harness mounting portion 71 is wound around the entire circumference of a part of the harness 101 to fix the stem clip 7 to the harness 101. As the shape, a ring shape is shown in FIG. 41 and FIG. 42, but a belt-like object may be wound and fixed, or may be tightened after winding.

The umbrella part 72 is a thing of the shape which opens an umbrella-shaped part toward the insertion direction from the end of the harness attachment part 71. As shown in FIG.
The insertion portion 73 is provided at the distal end in the insertion direction, and has a shape that opens an umbrella-shaped portion from the distal end portion in the direction opposite to the insertion direction, opposite to the umbrella portion 72.
The shaft portion 74 is a member that connects the umbrella portion 72 and the insertion portion 73 in the insertion direction.

The operation of the support structure for the circuit board unit 1 according to the second embodiment will be described. The upper case 2, the lower case 3, the circuit board 4, and the attachment to the cross car beam 50 are the same as in the case of the first embodiment, and the operation and effect are the same. Omitted.

[Cockpit module power distribution and wiring]
Since a plurality of mounting rib portions 23 are provided in the left and right direction on the upper surface of the circuit board unit 1, the harness 101 is first placed on the mounting rib portion 23 on the upper surface (harness arrangement side surface C) of the circuit board unit 1. Then, the harness 101 is wired in a bundle in the left-right direction, and then the harness 101 is bundled and fixed to the mounting rib portion 23 using the harness mounting portion 71 of the stem clip 7 and inserted as shown in FIG. By inserting the portion 73 into the through-hole 231 of the mounting rib portion 2, the harness 101 is fixed to the mounting rib portion 2 as shown in FIG. In this fixed state, the harness 101 is located away from the harness arrangement side surface C. A part of the harness 101 is pulled out over the upper surface of the upper case 2 and connected to the vehicle device.
In this case, since the power supply and signal lines are connected from the plurality of connectors 4d provided on the bottom surface of the circuit board unit 1, the inside of the installation panel of the cockpit module 51 has a very simple wiring structure. It becomes.

[Connector mounting]
In order to explain that the method of fixing the harness 101 of the circuit board unit 1 according to the second embodiment is performed while suppressing the external force from being applied to the circuit board 4, the external force on the circuit board 4 is suppressed in the connector mounting state. Will be described.
In the circuit board unit 1 according to the second embodiment, the connector protector 33 is provided on one side of the lower case 3 and the lower surface on the back side in FIGS. 35 and 36 to expose a plurality of connectors 4d connected to the circuit board 4 to the outside. ing. The position of the connector 4d is such that the upper case 2 is attached to the cross car beam 50 by the attaching

portions

24 and 25, and the lower case 3 does not support the load of the harness 101 that is a bundle of electric wires. Due to the structure to be assembled on the lower side, the position is provided at a position where the degree of freedom is obtained and the cross car beam 50 does not overlap vertically.
Thereby, after the circuit board unit 1 is attached to the cross car beam 50, it is easy to connect the connector of the vehicle device to the connector 4d.

Further, in this connection, since the connector of the vehicle device is connected to the connector 4d so as to be inserted from below, a force is applied upward as the circuit board 4. This force is received by the upper case 2 by the cylindrical rib portion 26 and the triangular rib portion 27 that are disposed relatively close to the connector 4d. The force is sufficiently received by the reinforcing structure 28 of the upper case 2 with the rigidity increased in the lateral direction by the reinforcing ribs 282a to 282n extended to both ends in the lateral direction. In addition, since the force is transmitted from the upper case 2 to the cross car beam 50, the lower case 3 is not affected by the connection of the connector and does not affect the circuit board 4. Supporting the circuit board 4 downward with high strength by the upper case 2 facilitates connector connection work.

[About fixing the harness]
In the circuit board unit 1 according to the second embodiment, the circuit board 4 housed therein transmits and receives power in the left-right direction of the vehicle. On the other hand, in the vehicle, it is required to further wire the cross car beam 50 portion. One reason for this is that since a high shielding property is required for an important signal, a shield line that satisfies this requirement is wired.

The circuit board unit 1 of Example 2 also has a shielding function.
(About shield function)
In the circuit board unit 1 of the second embodiment, the circuit board 4 functions in place of electric wires for supplying power and sending signals in the left-right direction inside the vehicle installation panel. In this function, when functioning instead of the shielded wire, as in the first embodiment, part of the shielding function is performed in the left and right longitudinal directions of the cross car beam 50 whose conductive pattern is made of a conductive material. Are obtained by being positioned at predetermined intervals along the line.

In the second embodiment, the reinforcing structure portion 28 is provided by thickening the range P overlapping the cross car beam 50 of the upper case 2, and the upper case 2 is attached to the cross car beam 50 by the

attachment portions

24 and 25. I am doing so. Accordingly, it is advantageous that the lower case 3 does not support the load of the harness 101 that is a bundle of electric wires, and the structure is attached to the lower side of the upper case 2 so that the structure and the wall thickness can be reduced. . This is because the gap distance in the shielding function with the cross car beam 50 can be reduced, and the degree of freedom for optimizing the position with respect to the cross car beam 50 is increased.

As described above, the circuit board unit 1 according to the second embodiment also has a shielding function. However, since there is a demand for wiring the harness 101 that is a bundle of wirings such as shield wires, in the second embodiment, The harness 101 is attached to the circuit board unit 1 attached to the cross car beam 50.

(Harness installation process)
FIG. 43 is a diagram illustrating a state in which the circuit board unit 1 according to the second embodiment is attached to the cross car beam 50 and the harness 101 is attached to the circuit board unit 1. FIG. 44 is a diagram illustrating a state in which the stem clip 7 holding the harness 101 is to be attached and fixed to the attachment rib portion 23 of the circuit board unit 1 of the second embodiment. FIG. 45 is an explanatory view showing a state in which the stem clip 7 is attached to the attachment rib portion 23 of the circuit board unit 1 of Example 2 and the harness 101 is fixed.

取り付ける To attach the harness 101 to the circuit board unit 1 of the second embodiment, the stem clip 7 is attached in advance to a plurality of locations of the harness 101, for example, 6 locations. Specifically, the harness 101 is attached to the harness attachment portion 71 of the stem clip 7.

Then, as shown in FIGS. 44 and 45, the harness 101 is positioned on the side where the upper surface position of the upper case 2 is lowered, in other words, on the side where the reinforcing structure portion 28 is not provided (harness arrangement side surface C). Thereafter, the stem clip 7 attached to the harness 101 is inserted so that the insertion portion 73 passes through the through hole 231 of the attachment rib portion 23.
Then, the insertion portion 73 is deformed to have a small diameter due to its elasticity, passes through the through hole 231, passes through and becomes free, and returns to its original shape due to elasticity. The stem clip 7 is urged in the insertion direction, in other words, to the side where the reinforcing structure 28 is provided by the elasticity of the bulk shape.

In addition, the umbrella part 72 will be in the state which elastically deformed the bulk shape in the insertion direction, ie, the axial direction of the axial part 74, when inserting the stem clip 7 in the through-hole 231 of the insertion part 73. Therefore, the umbrella portion 72 biases the stem clip 7 in the direction opposite to the insertion direction, in other words, the side where the reinforcing structure portion 28 is not provided, by the elasticity of the bulk shape after the insertion of the insertion portion 73 is completed. .

In this way, the harness 101 is fixed to the mounting rib portion 23 with sufficient strength by urging the insertion portion 73 and the umbrella portion 72 in the direction in which they are attracted to each other. In addition, since the stem clip 7 has elasticity, vibrations and transmission of external force between the circuit board unit 1 and the harness 101 are reduced.

In this way, the lower part of the harness 101 fixed by the attachment rib portion 23 floats upward from the upper surface (the harness arrangement side surface C) of the upper case 2 and is supported only by the attachment rib portion 23. This is because when the upper surface harness 101 of the upper case 2 comes into contact with the upper case 2, the vehicle vibration causes wear. It is also a consideration to prevent water droplets from being transmitted to the electric wire.
Since such wear and corrosion due to water droplets lower the shielding performance, this arrangement has a great effect of protecting the harness 101.

In the circuit board unit 1 of the second embodiment, the load is applied as an external force by attaching the harness 101 that is a bundle of electric wires.
The load is applied in the direction of bending the mounting rib portion 23 protruding upward, in other words, in the downward direction and on the harness 101 side. As shown in FIG. 40, the mounting rib portion 23 is provided on the portion (the harness non-position side B) where the upper structure of the upper case 2 is raised and the reinforcing structure portion 28 is provided, as shown in FIG. The height does not become the height h2 (the height from the harness arrangement side surface C to the top of the mounting rib portion 23), but the height h1 that shortens the torque arm. Therefore, the external force applied to the mounting rib portion 23 is suppressed by the load of the harness 101 and the load of the harness 101 and the vehicle signal.

Further, in the circuit board unit 1 of the second embodiment, the base end of the mounting rib portion 23 is a portion where the reinforcing structure portion 28 is provided (the harness non-arrangement side surface B), so that the reinforcing structure portion 28 of the upper case 2 is Receive this. In particular, the reinforcing ribs 282a to 282n, the reinforcing ribs 283a to 283m, and the reinforcing ribs 284a to 284f provided along the bending direction sufficiently support the rigidity. Further, since the reinforcing ribs 284a to 284f are provided so as to overlap with the mounting rib portion 23, the mounting rib portion 23 is supported more strongly.

Further, in the second embodiment, as shown in FIG. 43, the position of the harness 101 that is a bundle of electric wires is determined by using a portion in which reinforcing ribs 281c to 281j are provided at the upper portion of the upper case 2 to reduce the height. It is pulled out at four locations so as to get over the board unit 1. Also in the operation of pulling out and connecting to the vehicle device, an external force is applied in the direction of bending (falling) the mounting rib portion 23. Against this, since the base end of the mounting rib portion 23 is a portion provided with the reinforcing structure portion 28 which is a high upper surface position of the upper case 2, the external force is suppressed by shortening the torque arm. The Further, the reinforcing ribs 282a to 282n, the reinforcing ribs 283a to 283m, and the reinforcing ribs 284a to 284f provided along the bending direction by the external force are sufficiently supported by their rigidity. Further, since the reinforcing ribs 284a to 284f are provided so as to overlap with the mounting rib portion 23, the mounting rib portion 23 is supported more strongly.

In the circuit board unit 1 of the second embodiment, an external force is received by the reinforcing structure 28 of the upper case 2, and the external force applied to the upper case 2 is attached to the upper case 2 that supports the circuit board unit 1. It will be transmitted to the

parts

24 and 25. Therefore, this load is not transmitted to the circuit board 4 and the lower case 3.

Thus, in the circuit board unit 1 according to the second embodiment, the lower case 3 does not support the harness 101 that is a bundle of electric wires, and the upper case is attached to the cross car beam 50 by the

attachment portions

24 and 25. The lower case 3 is assembled to the lower side of 2 so that the external force is not transmitted to the circuit board unit 1 and is not affected by the external force. This structure is advantageous in that even if a very strong external force is applied to the upper case 2, the influence on the circuit board 4 is suppressed.
As shown in FIG. 43, the circuit board unit 1 is provided with the urethane material 6 between the lower case 3 and the cross car beam 50. However, there is no load transmission, and the circuit board unit 1 is in direct contact with vibration or deformation. It does not emit wear or low-pitched sound.

In order to clarify the operation of the second embodiment, a more detailed description will be given below.
FIG. 46 is an explanatory view showing an example in which the harness 101 is fixed to the circuit board unit 1 unlike the second embodiment. 47 is an explanatory view showing an engaging structure of a clip in the case of the structure of FIG.

When the harness 101 is fixed to the upper case 2 of the circuit board unit 1 so as to float upward from the upper surface of the upper case 2, it may be fixed as shown in FIG.
In this case, the clip 8 attached to the harness 101 is used so that the clip 8 is inserted from above into the attachment rib portion 23 erected from the upper case 2. At this time, for example, as shown in FIG. 47, a part of the clip 8 is engaged with the through hole 231 of the mounting rib portion 23 of the second embodiment.

The circuit board unit 1 according to the second embodiment is disposed long along the cross car beam 50 of the cockpit module 51 from side to side. On the other hand, the attached harness 101 is also long and left and right. In assembly work after this state, or vehicle maintenance, etc., if the harness 101 is bent and an arm, tool, or component is to be passed in the front-rear direction, or if the operator grasps the vicinity by hand, When wiring is performed, force may be applied to the harness 101.

In that case, the harness 101 is placed in a floating position, and the cockpit module can be bent at the center of the left and right. There are many.
Therefore, in the clip mounting structure from above shown in FIG. 46, when the harness 101 is moved upward, the fixing is released because it matches the assembly direction. When the fixing is released, the clip portion is worn by vibration or a low-frequency sound is generated. Also, a part of the harness 101 comes into contact with the upper case 2 or other parts and wears due to vibration, and the shielding performance is lowered. Will occur.

On the other hand, in Example 2, the direction of the external force that tends to lift the harness 101 that occurs frequently during work and the mounting direction in which the harness 101 is mounted on the mounting rib portion 23 with the stem clip 7 are substantially orthogonal. Since the directions are different, the harness 101 is prevented from being released from the circuit board unit 1. That is, the direction of the external force is not the direction in which the harness 101 is released. Therefore, the harness 101 can be fixed in a sufficiently good state.

The external force applied in the direction in which the harness 101 is lifted is applied to the mounting rib portion 23. The portion of the upper case 2 provided with the base end of the mounting rib portion 23 is a reinforcing structure portion 28, and the rib structure The external force is not transmitted to the circuit board 4 by receiving the external force with sufficient strength. This is due to the same action as in the case of receiving an external force applied in the direction of tilting the mounting rib portion 23 described above.

Next, effects of the support structure for the circuit board unit according to the second embodiment will be described.
In the circuit board unit according to the second embodiment, the effects listed below can be obtained in addition to the above-described effects of the first embodiment.

(14) The circuit board 4 is accommodated in the space formed by the upper case 2 and the lower case 3, and the harness 101 in which the wires are bundled is fixed to the circuit board 4 unit installed in the cross car beam 50. 4 is a harness fixing method for a circuit board 4 unit, wherein a mounting rib 23 is erected from the upper case 2 to the outside, and a stem clip 7 for mounting to the mounting rib 23 is attached to the harness 101. The direction of external force frequently applied to the circuit board 4 unit and the harness 101 in the work after the installation of the board 4 unit to the cross car beam 50 and the harness 101 are fixed to the mounting rib portion 23 by the stem clip 7. Since the mounting direction is different, the harness is applied to the circuit board unit while suppressing the force applied to the circuit board. It can be fixed well.

(15) The harness non-positioning side B of the upper case 2 that is not opposed to the harness 101 is made thicker than the harness arrangement side C of the upper case 2 that is opposed to and separated from the harness 101, and the harness is made more than the relative surface C. The height of the non-arrangement side surface B is increased to form a step between the harness arrangement surface C and the harness non-arrangement side surface B, and the base end of the attachment rib portion 23 is set to the harness non-arrangement side surface B. Since the installation length is shortened, the external force applied to the mounting rib portion 23 can be suppressed by shortening the arm of the torque due to the load by the harness 101 and the load of the harness 101 and the vibration of the vehicle. 101 can be fixed satisfactorily. Moreover, suppression of external force can suppress that force is applied to the circuit board 4.

(16) The elevated portion of the upper case 2 on the side where the harness is not disposed B is made to have a structure that increases the rigidity by the reinforcing structure 28, and the side of the upper case 2 where the harness is not disposed is the cross car beam 50. Since it is installed and the circuit board 4 unit is installed on the cross car beam 50, the part with increased rigidity becomes the installation part, so that external force is not transmitted to the circuit board 4, and the rigidity is improved. The enhanced reinforcing structure 28 can sufficiently receive the load of the harness 101 and the like.

(17) Since the harness 101 is arranged away from the harness arrangement surface C of the upper case 2 and is fixed to the mounting rib portion 23 by the stem clip 7, the harness 101 comes into contact with the harness arrangement side C and wears out. It is possible to prevent water droplets from adhering to the harness 101, and the harness can be fixed in a good state.

(18) The circuit board 4 is accommodated in the space formed by the upper case 2 and the lower case 3, and the harness 101 in which the wires are bundled is fixed to the circuit board unit installed in the cross car beam 50. A harness fixing structure for a circuit board unit, comprising a mounting rib portion 23 erected from the upper case 2 toward the outside, and the harness 101 being attached by a stem clip 7, and a stem to the mounting rib portion 23 of the harness 101 The mounting direction when mounting with the clip 7 is different from the direction of the external force frequently applied to the circuit board 4 unit and the harness 101 in the work after the circuit board unit is installed on the cross car beam 50. Therefore, it is possible to prevent the circuit board unit from being applied to the circuit board unit while suppressing the force from being applied to the circuit board. It can be satisfactorily fix.

(19) Since the attachment position of the stem clip 7 to the attachment rib portion 23 is set to the position where the harness 101 is separated from the upper case 2, it is possible to prevent the harness 101 from coming into contact with the harness arrangement side surface C and wearing out. It is possible to prevent water droplets from adhering to the harness 101, and the harness can be fixed in a good state.

(20) The upper case 2 is provided with a reinforcing structure portion 28 having a longitudinal rigidity higher than that of the lower case 3 and at least the opposing short side edge portion with the reinforcing structure portion 28. The lower case 3 is provided with a reinforcing rib 281k of the reinforcing structure portion 28 of the upper case 2 and provided with a mounting portion 25 that is provided in a continuous portion and attaches the circuit board unit 1 to the cross car beam 50. Since the cylindrical rib portion 26 is provided with the support portion 35b that is locked by fastening the screw 5 through the long hole 42 of the circuit board 4, the entire unit can be prevented from being enlarged, The external force to the unit can be made less likely to affect the circuit board.

(21) The reinforcing structure portion 28 of the upper case 2 is a range P in which the upper case 2 and the cross car beam 50 overlap each other in the longitudinal direction of the upper case 2 and a part in the short direction. Therefore, when the circuit board unit 1 is attached to the cross car beam 50 and when the bending of the cross car beam 50 is applied to the circuit board unit 1 as an external force after the attachment, the

attachment portions

24 and 25 are provided. The reinforcing structure 28 can receive the external force from the outside so that the external force does not affect other portions. Further, the harness 101 can be attached in a space-saving manner.

(22) The reinforcement structure 28 of the upper case 2 is formed so that the upper case 2 has a top surface shape that increases the space above the circuit board 4, and reinforcing ribs 281 a to 281 k are provided on the top surface of the upper case 2, Since a plurality of ribs 282a to 282n, reinforcing ribs 283a to 283m, and reinforcing ribs 284a to 284f are erected, the shape is easy to punch, and is effective for bending in the longitudinal direction and bending in the torsional direction. It can be performed.

(23) The reinforcing ribs 281a to 281k, 282a to 282n, 283a to 283m, and 284a to 284f of the upper case 2 are substantially orthogonal to the reinforcing ribs 281a to 281k extending in the longitudinal direction of the circuit board unit 1. Since the reinforcing ribs 282a to 282n, 283a to 283m, and 284a to 284f extending in the direction are arranged in a lattice shape, reinforcement with higher rigidity can be performed by the lattice shape.

(24) The reinforcing ribs 281a to 281k, 282a to 282n, 283a to 283m, and 284a to 284f of the upper case 2 are provided with a plurality of reinforcing ribs 281a to 281k in the longitudinal direction of the circuit board unit 1. Since the structure is made to extend in a real manner, an external force that bends the circuit board unit 1 in the bending direction can be sufficiently received.

(25) A mounting rib portion 23 for attaching the harness 101 extended in the longitudinal direction of the circuit board unit 1 to the circuit board unit 1 is provided on the upper surface of the upper case 2, and the reinforcing ribs 281a to 281k, 282a of the upper case 2 are provided. Among the plurality of ˜282n, 283a˜283m, 284a˜284f, the reinforcing ribs 284a˜284f are provided at positions overlapping the mounting rib portion 23 in the direction orthogonal to the longitudinal direction of the circuit board unit 1. The load of the harness 101 and the external force applied by the work related to the harness 101 can be sufficiently received.

(26) The mounted member is a cross car beam 50 that is long in the left-right direction of the vehicle, and the circuit board 4 and the outside are electrically connected to the lower surface of the lower case 3 so as not to overlap the cross car beam 50. Since the connector 4d to be connected is provided, the connection work to the connector 4d can be performed very easily, and the external structure during the work related to the connector 4d is provided at a position overlapping the cross car beam 50 The portion 28 can be received with high rigidity.

A structure in which the harness 101 is supported on the mounting rib portion 23 by using the stem clip 7 and a reinforcing rib structure using the reinforcing ribs 281a to 281k, 282a to 282n, 283a to 283m, and 284a to 284f are as follows. It goes without saying that the circuit board unit support structure in which no gap is provided between the lower surface of the case 3 and the mounted member such as the cross car beam 50 can be used.

As mentioned above, although the circuit board unit of this invention was demonstrated based on Example 1, it is not restricted to these Examples about concrete structure, The summary of the invention which concerns on each claim of a claim As long as they do not deviate, design changes and additions are permitted.

In the above-described embodiment, the left and right circuit boards 4 have been described as examples. However, the circuit board 4 may be composed of a plurality of parts or a single body.
In addition, the circuit board 4 may be either a circuit board that has almost no electronic components mounted thereon or a circuit board that is sufficiently mounted with electronic components for power supply and signal transmission.

Claims

In the support structure of the circuit board unit supported by the mounted member in a state in which the circuit board is accommodated in the space formed by the upper case and the lower case,
The upper case and the lower case are provided with an engaging portion for coupling and integrating these cases,
An attachment portion for attaching the circuit board unit to the attachment member is provided on each of a pair of edge portions facing at least the longitudinal direction of the upper case,
When the upper case is attached to the attached member, a gap is formed between the bottom case bottom surface and the lower case bottom side surface of the attached member.
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to claim 1,
With the upper case and the lower case, the circuit board is held from above and below,
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to claim 2,
The structure for holding the circuit board is:
An upper holding portion provided on the upper case with a lower surface in proximity to the circuit board;
A lower holding portion provided on the lower case with an upper surface thereof close to the circuit board;
Fastening means for fastening the upper clamping part and the lower clamping part;
With
The center portion in the short direction of the circuit board is sandwiched between the upper clamping portion and the lower clamping portion.
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to any one of claims 1 to 3,
The attached member is a cross car beam that is a structural member of a cockpit module of a vehicle,
The circuit board unit is attached to the cross car beam at both ends of the circuit board unit so that the vehicle left-right direction of the cockpit module is the longitudinal direction.
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to any one of claims 1 to 4,
A first coupling means for coupling the upper case and the lower case, and capable of holding the circuit board so as to be sandwiched in a predetermined position range by the upper case and the lower case;
A second coupling means for fixing the circuit board to the upper case or the lower case, and to couple more firmly than the first coupling means for coupling the upper case and the lower case;
With
The second coupling means releases the coupling of the first coupling means during the coupling;
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to claim 5,
The first coupling means is an engagement of the engaging part of the upper case and the engaging part of the lower case,
The second coupling means is fastening of the upper case and the lower case,
The upper case and the lower case are brought into close contact with each other by fastening the upper case and the lower case, and the engagement of the engaging portion is released.
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to claim 5 or 6,
The engaging portion of the first coupling means includes a claw portion and a claw receiving portion having a step for receiving the claw portion,
The circuit board unit support structure, wherein the second coupling means is a screw for fastening the upper case and the lower case.
In the support structure of the circuit board unit according to any one of claims 5 to 7,
The first coupling means doubles as an alignment of the upper case and the lower case for fastening the second coupling means.
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to any one of claims 5 to 8,
A first holding portion provided at a position higher than the lower surface of the lower case and supporting the lower surface of the peripheral edge of the circuit board;
A second holding portion that is provided at the same height as the first holding portion of the lower case and supports the lower surface of the through hole portion for fastening at the center of the circuit board;
A first rib portion that protrudes downward from the lower surface of the upper case and is in contact with or close to an upper surface position that does not overlap the first holding portion of the circuit board;
A second rib portion that protrudes downward from the lower surface of the upper case and is in contact with or close to the upper surface position overlapping the second holding portion of the circuit board;
With
The first coupling means is an engagement of the engaging part of the upper case and the engaging part of the lower case,
In the coupled state by the first coupling means, the first rib portion is in contact with the circuit board, and is held so that the circuit board is sandwiched between the first rib portion, the first holding portion, and the second holding portion. And
The second coupling means is for fastening at least the second holding part and the second rib part by fastening the upper case and the lower case,
In the coupled state by the second coupling means, the second holding portion and the second rib portion hold the circuit board so as to sandwich the circuit board, and the first rib portion is more than the coupled state by the first coupling means. It will be in a state of being strongly pressed against the circuit board,
A support structure for a circuit board unit.
The support structure for a circuit board unit according to any one of claims 1 to 9,
The circuit board has a solder portion;
A plurality of engagement recesses provided at intervals along one side edge of the upper case and the lower case, and provided at least along the longitudinal direction of the circuit board;
An engaging convex portion provided on the other edge of the upper case and the lower case so as to be paired with the engaging concave portion,
With
The engagement recess and the side surface of the engagement protrusion are opposed to each other in a state where a part thereof is separated in the longitudinal direction of the circuit board, and are separated in a state where the circuit board unit is horizontally supported. In the support state that causes the substrate unit to bend, it contacts within a range where the strain value of the solder part does not exceed the allowable limit.
A support structure for a circuit board unit.
The circuit board unit according to claim 10,
The supporting state that causes the bending is a state in which the circuit board unit is at least cantilevered.
A support structure for a circuit board unit.
The circuit board unit according to claim 10,
The supporting state causing the bending is a state in which the cockpit module is supported at both ends of the cross car beam.
A support structure for a circuit board unit.
The circuit board unit support structure according to any one of claims 10 to 12,
The engaging convex portion includes a seating portion that receives the head portion of the screw, and a through hole that penetrates the screw portion,
By engaging the engagement protrusion with the engagement recess, the upper case and the lower case are temporarily assembled,
The engagement between the engagement concave portion and the engagement convex portion is used as a means for limiting the positional displacement in the longitudinal direction of the circuit board of the upper case and the lower case before and when the screw is fastened.
A support structure for a circuit board unit.
The circuit board unit support structure according to any one of claims 10 to 13,
Provided on the periphery of the bottom surface of the upper case is a frame-shaped peripheral side wall that protrudes downward and accommodates the lower case inside,
The peripheral side wall portion is provided with notches at a plurality of locations, and a receiving portion for screwing the screw portion of the screw is provided at the position of the notch to form the engagement recess.
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to any one of claims 1 to 14,
A harness electrically connected to the circuit board;
A rib that is erected outward from the upper case, and the harness is attached by attachment means;
With
The attachment direction when the harness is attached to the rib by the attachment means is an external force that is frequently applied to the circuit board unit and the harness in the work after the circuit board unit is installed on the attached object. Set to be different from the direction,
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to claim 15,
The upper case includes a portion having a harness arrangement side on the side where the harness is spaced apart, and a portion having a harness non-arrangement side where the harness is not arranged,
While thickening the part having the harness non-arrangement side than the part having the harness arrangement side,
Increasing the height of the harness non-arrangement side than the harness arrangement side surface, forming a step between the harness arrangement side surface and the harness non-arrangement side surface,
The base end of the rib is the harness non-arrangement side surface, and the standing length of the rib is shortened.
A support structure for a circuit board unit.
The support structure for a circuit board unit according to claim 16,
The raised part of the upper case on the side where the harness is not arranged is structured to increase rigidity,
The harness non-placement side surface side of the upper case is attached to the attached object, and the circuit board unit is installed on the attached object.
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to any one of claims 1 to 17,
The upper case is
Reinforcing means for making the rigidity in the longitudinal direction higher than the rigidity in the longitudinal direction of the lower case;
Provided in at least a portion of the side edge facing the reinforcing means that is connected to the reinforcing means, and includes an attachment portion for attaching the circuit board unit to the attached member,
And the lower case comprises a locking means for locking at a location where the reinforcing means of the upper case is provided,
A support structure for a circuit board unit, comprising:
The support structure for a circuit board unit according to claim 18,
The reinforcing means is
Provided within the range where the upper case and the attached member overlap with each other in all of the longitudinal direction of the upper case and part of the short direction,
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to claim 18 or 19,
The reinforcing means is
The upper case has a top shape that enlarges the space above the circuit board,
A plurality of reinforcing ribs erected on the top surface of the upper case.
A support structure for a circuit board unit.
The support structure for a circuit board unit according to claim 20,
The reinforcing rib is
Those extending in the longitudinal direction of the circuit board unit and a direction substantially orthogonal to the longitudinal direction are arranged in a lattice shape,
A support structure for a circuit board unit.
In the support structure of the circuit board unit according to claim 20 or 21,
The reinforcing rib is
A part of the plurality of standing parts has a structure that extends in the longitudinal direction of the circuit board unit.
A support structure for a circuit board unit.
The support structure for a circuit board unit according to any one of claims 20 to 22,
A cable attaching portion for attaching a cable extended in the longitudinal direction of the circuit board unit to the circuit board unit is provided on the upper surface of the upper case,
The reinforcing rib is
A plurality of standing parts are provided at positions that overlap the cable mounting portion in a direction orthogonal to the longitudinal direction of the circuit board unit.
A support structure for a circuit board unit.
The support structure for a circuit board unit according to any one of claims 19 to 23,
The attached member is a vehicle body member that is long in the left-right direction of the vehicle,
In the lower surface of the lower case, a connector that electrically connects the circuit board and the outside is provided in a portion that does not overlap the attached member.
A structure for supporting a circuit board unit.