JP3496257B2 - Box structure of vehicle electronic equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box structure of electronic equipment mounted on a vehicle, and is used for a package of an engine control unit, for example.

[0002]

2. Description of the Related Art An engine control unit (hereinafter abbreviated as "ECU") mounted on a vehicle for controlling the engine of the vehicle is constructed by fixing and sealing a printed circuit board on which electronic circuit parts including a microcomputer are mounted in a box. The box body is fixed and held on the vehicle body via a bracket.

As shown in FIG. 7, a printed circuit board 1 housed in a box body has an electronic circuit component 12 and a connector 13 assembled on a circuit board body 11, and then a moistureproof agent 4 is applied to the surface of the printed circuit board 1. . The moisture-proofing agent 4 is stored in a bath (not shown), and the printed circuit board 1 suspended by a hanger or the like is dipped in the bath to a predetermined depth, and then pulled up and dried to be applied.

The liquid level of the moisture preventive agent 4 in the bath described above is not stable due to vibration when the printed circuit board 1 is immersed, and as shown in FIG. 7, the upper limit height is higher than the prescribed height (1). (2) to the lower limit height (3). Since productivity is significantly reduced when waiting for the fluctuation of the liquid level to subside, it is desirable to be able to produce while the liquid level is fluctuating. However, as shown in FIG. 7, when the liquid level is at the upper limit height (2), the moistureproof agent 4 enters the inside 13c of the connector 13 and adheres to the surface of the lead 13b. It may cause poor contact.

Therefore, if the leg portion 13a is provided between the connector 13 and the substrate body 11 as shown in FIG. 8, even if the liquid level rises to the upper limit height (2), the moistureproof agent 4 enters the connector 13. Since it does not, it is possible to solve the above problems. Next, a conventional ECU box body will be described with reference to FIGS. This box body is composed of a box member 2 and a flat lid 3.

The box member 2 is mainly a flat rectangular parallelepiped shape, and the rectangular frame 21 and the bottom surface 25 are integrally formed, and the portion facing the bottom surface 25 is an opening for housing the printed circuit board 1 in the box member 2. Has become. Then, at least one of the four side surfaces of the rectangular frame 21 in contact with the outside air is
It has a connector opening 22 for penetrating the connector 13 provided on the printed board 1 to the outside of the box for transmitting and receiving signals between the CU and the outside.

[0007] L ₁ as the number of poles of the larger example connector 13 than the width of the connector 13 so that the longitudinal direction at a width can hold the connector 13 is shown in FIG. 10 when the smallest of the connector opening 22 ' When the number of poles of the connector 13 is maximum, it is set to L ₂ 'as shown in FIG. The height of the connector opening 22 in the short side direction is the height of the connector 13, the connector leg 13a, the board body 11, and the connector 1.
The height H'sufficient for accommodating the screw 14 for fixing 3 to the board body 11 in the box member 2. The width and height of the connector opening 22 are set to be the same or slightly larger than the width and height of the connector so as to accommodate the connector.

The printed circuit board 1 housed through the opening of the box member 2 described above has a screw 27 on a shelf 26 as a holding member integrally provided with the square frame 21 on the inner wall surface of the square frame 21.
It is fixed by screws and held. And the square frame 21
A screw hole 23 for fixing the flat lid 3 by screwing is provided in the opening of the. Further, the box member 2 is generally made of an aluminum material in consideration of electromagnetic shielding performance and light weight, and is formed into a thin and flat shape by a method such as aluminum die casting.

The flat lid 3 has, for example, a thickness of about 1 mm and a side of about 15
A plate 31 of a flat plate-like 0 mm, the 4 in the corner is formed through-holes 3 2, by fixing to the through hole 3 2 into the screw hole 23 of the allowed box member 2 through a screw 33 The flat lid 3 closes the opening of the box member 2. When the flat lid 3 covers the box member 2, a bent portion 34 for covering the connector leg portion 13a of the connector 13 provided for the above-described purpose is provided at a portion of the flat lid 3 that abuts the connector opening 22. ing. The width direction of the bent portion 34 is, for example, the connector 1
The L ₁ as shown in FIG. 10 when 3 the number of poles is minimal,
When the number of poles of the connector 13 is the maximum, it is set to L ₂ as shown in FIG. And the height direction of the bent portion 34 is
For example, the height D is set to be enough to cover the connector gap 15 including the leg portion 13a, the board body 11, and the screw 14. The bent portion 34 prevents dust and water from entering the inside of the box body and prevents deterioration of the electromagnetic shield performance.

Similar to the box member 2, the flat lid 3 is generally made of an aluminum material in consideration of electromagnetic shielding performance and light weight, and is formed into a plate shape by a method such as press molding.

[0011]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the CU, a plurality of types of connectors 13 having different numbers of poles, that is, different sizes are used according to the circuit scale of the ECU. Moreover, the general connector 13 used in the ECU has a common size in the lateral direction, but the size in the longitudinal direction changes according to the number of poles. For this reason, in the box body of the ECU, the box member 2 in which the opening width of the connector opening 22 differs depending on the size of the connector 13 and the flat lid 3 in which the width of the bent portion 34 differs are prepared. This has led to an increase in the type and cost of the ECU.

Therefore, in the present invention, at least one of a plurality of types of box members 2 and flat lids 3 prepared for each type of connector is commonly used regardless of the type of connector without deteriorating the shielding property of the box body. To reduce ECU product types,
The purpose is to reduce costs.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the invention of claim 1, a board on which a vehicle control electronic circuit for controlling each part of the vehicle is mounted; A connector provided in the middle of a communication path with the electronic circuit, the connector being selected from a group of various connectors having different sizes according to the scale of the electronic circuit, and the predetermined distance from the board.
Accommodates a connector and a substrate that are fixed at a distance
A vehicle electronic device including a box and a lid that covers the box.
A box structure, in which the selected connector is
A connector opening is formed to engage the connector, and
Is a predetermined space formed between the board and the connector.
A bent portion for covering the space is formed and the bent portion
Corresponds to the largest size connector in the connector group
Connector in the connector group.
A gap cover member having a specific size corresponding to each and covering a gap formed between the two when the connector is engaged with the connector opening is integrally formed in the box portion.
It is a technical means of a box structure of an electronic device for a vehicle, which is characterized in that In the invention according to claim 2,
A base mounted with a vehicle control electronic circuit that controls each part of the vehicle.
In the middle of the communication path between the board, each part of the vehicle and the electronic circuit
The size of the electronic circuit varies according to the scale of the electronic circuit.
A connector selected from various connector groups consisting of
A connector fixed at a predetermined distance from the board and the base
Vehicle provided with a box portion for accommodating the plate and a lid portion for covering the box portion
A box structure of a dual-purpose electronic device, wherein the box portion is
Creates a connector opening that engages the selected connector
And the connector opening is the connector group.
Formed with dimensions corresponding to the largest dimensions of the connector
And the lid is formed between the board and the connector.
A bent part is formed to cover the specified interval,
Each connector in the connector group has a unique
Has a size and engages the connector in the connector opening.
A gap cover member that covers the gap created between the two when combined
The vehicle is characterized by being integrally formed with the bent portion.
It is a technical means of a box structure of a dual-purpose electronic device.

[0014]

In the present invention, the box body has the box portion and the lid portion joined together.
Has been formed. Selected connector is engaged with the box
Connector opening is formed, and the lid is connected to the board.
Bent part to cover the specified space formed between the
Are formed.

Since the connector opening or the bent portion is formed in accordance with the largest connector which can be engaged with the connector opening, all the connectors can be engaged. At this time, a gap generated between the connector open mouth engaged with the connector has a respective connector-specific size, is integrally formed into a box portion or bent portion
It is covered by the gap cover member.

[0016]

EFFECTS OF THE INVENTION Provided in a connector opening or lid formed in a box of a box for housing electronic equipment for controlling a vehicle.
By forming the bent portion in accordance with the largest one of the connectors, either the box portion or the lid portion can be made common regardless of the type of the connector. Therefore, it is possible to reduce the variety of ECUs and the cost. In addition, the gap opened in the connector opening should cover the gap corresponding to the size of the connector.
Shielding properties of the box is not reduced in order to be covered by the had member.

[0017]

(First Embodiment) A first embodiment to which the present invention is applied will be described with reference to FIGS. In the first embodiment, as shown in FIGS. 2 and 4, the flat lid 3 has a width L ₂ (L ₂ <L ₂ ′) corresponding to the connector 13 having the maximum number of poles, that is, the maximum width, among the plurality of types of connectors 13, and a high height. The bent portion 34 is formed in a substantially right angle of D (D <D ').

The box member 2 is a box body having a one-sided opening in which a rectangular frame 21 and a bottom surface 25 are integrally formed by aluminum die casting or the like, and a connector opening portion 22a and a connector housing portion 22a for housing the connector 13. , A bent portion housing portion 22b for housing the bent portion 34 of the flat lid 3. The width of the connector housing portion 22a is larger than the width of the connector 13 so that the connector 13 can be housed, and corresponds to the width that changes depending on the number of poles of the connector 13, for example, when the number of poles of the connector 13 is minimum. Is set to L ₁ ′ as shown in FIG. 4, and to L ₂ ′ as shown in FIG. 2 when the number of poles of the connector 13 is maximum, and the height of the connector housing portion 22a is set to the connector 13 Larger than the height of the connector 13 so that it can be stored (H'-D ')
Is set to.

The height of the bent portion storage portion 22b is such that the leg portion 13a is
And cover the heads of the board body 11 and the screw 14 inside the box member 2.
It can be stored as well as the bent portion 34 of the flat lid 3.
Total of the legs 13a, the board body 11, and the heads of the screws 14
It is set to D ', which is larger than the height, and the bending part
The width of the storage portion 22b is the maximum number of poles, that is, the maximum width of the connector.
Width of the bent portion 34 of the flat lid portion 3 formed corresponding to the switch 13
L₂Larger than L ₂'Is formed.

That is, when the number of poles of the connector 13 is the minimum, the width = L ₁ 'and the height = H'- of the connector housing portion 22a.
D ′, the width of the bent portion housing portion 22b = L ₂ ′, the height = D ′, the width of the bent portion 34 = L ₂ <L ₂ ′, and the height = D <D ′. When the number of poles of the connector 13 is the maximum, the connector housing 2
Width of 2a = L ₂ '= width and height of bending part storage 22b = H'
-D ', width = L ₂ of the bent portion accommodating portions 22b', height = D ',
The width of the bent portion 34 is L ₂ <L ₂ 'and the height is D <D'.

[0021] From the number of poles of the connector 13 is smallest maximum range width = Lx of the connector housing portion 22a '(L _1' <
L _X '<L ₂ '), height = H'-D ', bending part storage part 22
width of b = L ₂ ', height = D', width of bent portion 34 = L ₂ <L
₂ ', height = D <D'. As explained above, the first
In the embodiment, the connector housing portion 22a of the box member 2 is set to have a width corresponding to the number of poles of the connector 13, and the width of the bent portion housing portion 22b of the box member 2 and the bent portion 34 of the flat lid 3 is set to the maximum number of poles. That is, the width corresponding to the maximum width connector 13 is unified. As a result, the flat lid 3 which has been prepared according to the type of the connector 13 can be commonly used, the type of ECU can be reduced, the cost can be reduced, and the shielding property of the box can be maintained.

(Second Embodiment) In the first embodiment, the flat lid 3 is used.
The same effect can be obtained even if the box member 2 is unified and made common to one type, while the box member 2 is unified and made common to one type. Therefore, a second embodiment to which the present invention is applied will be described with reference to FIGS. In the second embodiment, the connector opening 22 of the box member 2 is integrally formed to have the maximum number of poles, that is, the width L ₂ ′ corresponding to the maximum width of the connector 13. Therefore, the box member 2
When accommodating the printed circuit board 1 of the minimum number of poles ie the minimum width of the connector 13 within the width L ₂ in the connector housing portion 22a '-L _1', a gap 16 of height H '-D', bend A gap 15 having a width L ₂ 'and a height D'is formed in the storage portion 22b.
When the printed circuit board 1 of the connector 13 having the maximum number of poles, that is, the maximum width is accommodated, the gap 16 is not formed. Therefore, the bent portion 34 of the flat lid 3 is formed to have a width corresponding to the number of poles of the connector 13.

The bent portion 34 is composed of bent portions 34a and 34b formed corresponding to the gap 16 and the bent portion housing portion 22b. The bent portion 34a has a width = L ₂ −L ₁ <L ₂ ′ −L ₁ ′, and a height = HD− <
Is formed in a H '-D', bent portion 34b is corresponding to the bent portion accommodating portions 22b width = L ₂ <height L ₂ 'D <
D'is formed. The bent portion 34b is unified regardless of the number of poles of the connector 13.

Thus, when the printed circuit board 1 of the connector 13 having the minimum number of poles, that is, the minimum width is assembled in the box body, the gap 16 is covered by the bent portion 34a and the bent portion 3 is formed.
The gap 15 is covered by 4b. For the printed circuit board 1 of the connector 13 having the maximum to the minimum number of poles, the width of the gap 16 corresponds to the width of the connector 13 and Lx ′ is 0 <L.
x '<L ₂ ' -L ₁ 'because of the width L of the bent portion 34a
x (<Lx ') is 0 <Lx <gap 15 by a bending portion 34b L ₂ -L is formed a gap 16 ₁ is covered
Are covered.

As described above, in the second embodiment, the connector openings 22 of the box member 2 are unified to have a width corresponding to the maximum number of poles, that is, the connector 13 having the maximum width, and the bent portion 34b of the flat lid 3 is used. The extending bent portion 34a is provided. As a result, the box member 2 which has been prepared according to the type of the connector 13 can be commonly used, the type of ECU and the cost can be reduced, and the shielding property of the box can be maintained.

In the first embodiment, the lid member having the structure of the present invention is the connector opening 2 of the box member 2 in the first embodiment.
In the second embodiment, the bent portion 34 of the flat lid 3 is integrally molded, but the lid member is provided separately from the box member 2 or the flat lid 3 to form a box member. Both 2 and the flat lid 3 can be made common.

The material of the box member 2 and the flat lid 3 in the embodiment may be other metal or resin other than aluminum. The box member 2 and the flat lid 3 may be assembled by rivets or caulking, instead of tightening with screws.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of FIG. 2 showing a first embodiment to which the present invention is applied.

FIG. 2 is a sectional perspective view taken along the line AA in FIG. 1 showing a first embodiment to which the present invention is applied.

FIG. 3 is a vertical sectional view of FIG. 4 showing a first embodiment to which the present invention is applied.

FIG. 4 is a cross-sectional perspective view taken along the line AA in FIG. 3 showing the first embodiment to which the present invention is applied.

5 is a longitudinal sectional view of FIG. 6 showing a second embodiment to which the present invention is applied.

FIG. 6 is a cross-sectional perspective view taken along line AA in FIG. 5 showing a second embodiment to which the present invention is applied.

FIG. 7 is a diagram showing a relationship between a printed circuit board on which a connector having no legs is mounted and the liquid level of the moisture-proofing agent bath in the step of applying the moisture-proofing agent.

FIG. 8 is a diagram showing a relationship between a printed circuit board on which a connector having legs is mounted and the liquid level of the moisture-proofing agent bath in the step of applying the moisture-proofing agent.

FIG. 9 is a vertical cross-sectional view of FIG. 10 showing a conventional example when the number of poles of the connector is minimum.

FIG. 10 is a cross-sectional perspective view taken along the line AA of FIG. 9 showing a conventional example when the number of poles of the connector is minimum.

11 is a vertical cross-sectional view of FIG. 12 showing a conventional example when the number of poles of the connector is maximum.

12 is a cross-sectional perspective view taken along line AA of FIG. 11 showing a conventional example when the number of poles of the connector is maximum.

[Explanation of symbols]

1 printed circuit board 2 box members 3 Flat lid 4 Moisturizer 11 Board body 12 Electronic circuit components 13 connectors 13a legs 13b lead 13c Inside of connector 14 screws 15 Gap 16 gaps 21 square frame 22 Connector opening 22a Connector storage section 22b Bent section storage section 25 Bottom 26 shelves 31 plates 32 through holes 33 screws 34 Bend

Continuation of the front page (56) References JP-A-2-144994 (JP, A) JP-A-5-299865 (JP, A) JP-A-5-63387 (JP, A) Actual development Sho-64-57690 (JP , U) Actual development 64-50480 (JP, U) Actual development 64-50481 (JP, U) Actual development 63-121486 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) H05K 9/00 H05K 5/00-5/06

Claims (2)

(57) [Claims] 1. A board on which a vehicle control electronic circuit for controlling various parts of a vehicle is mounted, and a board provided in the middle of a communication path between the various parts of the vehicle and the electronic circuit, the size of which is determined according to the scale of the electronic circuit. a connector is selected from a variety of different connector group, a connector is fixed at the substrate by a predetermined distance and before
A box structure for a vehicle electronic device, comprising: a box portion for accommodating a printed circuit board; and a lid portion for covering the box portion , wherein the box portion is connected to the selected connector.
A connector opening is formed, and the lid is formed between the substrate and the connector.
When a bent portion is formed to cover the specified interval
In, the bending portion is formed at a size corresponding to the connector of the maximum dimension in the connector group has a specific size corresponding to the respective connectors in the connector group, said connector opening A box body structure for a vehicle electronic device, characterized in that a gap cover member for covering a gap formed between the two when the connector is engaged is integrally formed with the box portion . 2. Electronic vehicle control for controlling various parts of the vehicle
A board on which the path is mounted, It is provided in the middle of the communication path between each part of the vehicle and the electronic circuit.
The size of the electronic circuit varies depending on the size of the electronic circuit.
Connectors selected from various connector groups, A connector fixed at a predetermined distance from the board and the front
A box part for housing the substrate, A lid that covers the box, A box structure of a vehicle electronic device comprising: The box portion has a connector to which the selected connector is engaged.
The connector opening is formed while the connector opening is formed.
Corresponds to the largest size connector in the connector group
It is formed with different dimensions, The lid is formed between the board and the connector.
A bent part is formed to cover the specified interval. Each connector in the connector group has a unique
Has a size and engages the connector in the connector opening.
Gap cover member that covers the gap created between the two when combined
The vehicle is characterized by being integrally formed with the bent portion.
Dual-purpose electronic device box structure.