JP2023032384A - Electronic control device - Google Patents

Abstract

To improve dust resistance of an electronic control device.SOLUTION: A first protection member 14 provided at a circumference of a first connector 2 is an annular member which is substantially rectangular on the whole, and has an annular base part 21 which sandwiches an inner face 9a and an outer face 9b of a base part 9 of a first case 7 and is sectioned in a C shape, and a protection part 22 which closes a gap between the first opening part 11 and first connector 2 outside the first case 7 and is in an annular thin plate shape. The protection part 22 extends from an inner peripheral side of the base part 21 obliquely toward an outer side of an enclosure 6 and an inner peripheral side of the first opening part 11. The protection part 22 is formed long enough to come into contact with an outer peripheral wall 2a of the first connector 2, and can cover the gap between the first opening part 11 and first connector 2 from outside the first case 7.SELECTED DRAWING: Figure 4

Description

The present invention relates to electronic control units.

For example, Patent Literature 1 discloses an electronic control device having a case in which one side of a rectangular parallelepiped is entirely open, a printed circuit board on which a connector is mounted and accommodated in the case, and a cover that closes one side of the case. A housing structure for the device is disclosed. In Patent Document 1, one end of a connector mounted on the printed circuit board protrudes to the outside from an opening (through hole) formed in the cover.

In Patent Document 1, the cover is attached to one side surface of the case after the printed circuit board is accommodated in the case, and at this time, one end of the connector passes through the opening of the cover.

JP-A-11-289178

However, the opening of the cover is formed so as to have a gap (predetermined clearance) with the outer peripheral surface of the connector so that the connector can pass through.

Therefore, in Patent Document 1, after the cover is completely assembled to the case in which the printed circuit board is housed, foreign matter enters the interior through the gap between the opening of the cover and the connector, causing a problem. There is fear.

According to one aspect of the present invention, an electronic control device includes a circuit board on which a connector is mounted, and a housing for housing the circuit board, the housing passing through the connector. A flexible opening is formed around the opening or around the connector so that it can be elastically deformed following the insertion of the connector when the connector is inserted into the opening from the inside of the housing. , a protective member is attached to cover a gap between the opening and the connector.

ADVANTAGE OF THE INVENTION According to this invention, an electronic control unit can improve dust resistance.

1 is an explanatory diagram schematically showing an electronic control unit according to a first embodiment of the invention; FIG. 1 is a plan view of an electronic control unit according to a first embodiment of the invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing an enlarged main part of an electronic control unit according to a first embodiment of the present invention; 1 is a cross-sectional view of a main part of an electronic control unit according to a first embodiment of the present invention; FIG. The top view of the protective member in 1st Example of this invention. FIG. 2 is a cross-sectional view of the main part of the housing with the protective member attached according to the first embodiment of the present invention; FIG. 5 is a cross-sectional view of a main part of an electronic control unit according to a second embodiment of the invention; FIG. 11 is a cross-sectional view of a main part of an electronic control unit according to a third embodiment of the invention; FIG. 5 is an explanatory diagram schematically showing an electronic control unit according to a fourth embodiment of the invention; FIG. 5 is a cross-sectional view of a main part of an electronic control unit according to a fourth embodiment of the invention;

An embodiment of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is an explanatory diagram schematically showing an electronic control unit 1 according to a first embodiment of the invention. FIG. 2 is a plan view of the electronic control unit 1 according to the first embodiment of the invention. FIG. 3 is an explanatory diagram showing an enlarged main part of the electronic control unit 1 according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view of the main part of the electronic control unit 1 according to the first embodiment of the invention. FIG. 5 is a plan view of the first protective member 14 in the first embodiment of the invention. FIG. 6 is a cross-sectional view of main parts of the housing 6 with the first protective member 14 attached in the first embodiment of the present invention.

The electronic control device 1 is mounted on a vehicle such as an automobile, for example, and as shown in FIG. ) and a housing 6 that accommodates the circuit board 5 .

The first connector 2, the second connector 3 and the third connector 4 are attached with terminals (not shown) from the outside.

The housing 6 has a first case 7 and a second case 8 . The first case 7 is attached to the second case 8 so as to cover the substantially rectangular plate-shaped second case 8 to which the circuit board 5 is fixed.

The first case 7 includes a substantially rectangular base portion 9 facing the mounting surface of the circuit board 5 , and surrounding the base portion 9 . It has a peripheral wall portion 10 extending from the outer peripheral edge, and has a box shape as a whole.

The base 9 of the first case 7 has a first opening 11 as an opening through which the substantially rectangular first connector 2 can pass, and a second opening 12 as an opening through which the second connector 3 can pass. and are formed. The first opening 11 and the second opening 12 are substantially rectangular holes penetrating the base portion 9 respectively. The first opening 11 is formed so as to form a predetermined gap with the outer peripheral wall 2a of the first connector 2 so that the first connector 2 can pass therethrough. The second opening 12 is formed such that a predetermined gap is formed between it and the outer peripheral wall 3a of the second connector 3 so that the second connector 3 can pass therethrough.

A third opening 13 is formed in the peripheral wall portion 10 of the first case 7 so as to correspond to the third connector 4 . The third opening 13 is formed by cutting out a part of the peripheral wall portion 10 . The third connector 4 is positioned outside the first case 7, as shown in FIGS. The periphery of the third opening 13 and the space between the third connector 4 and the circuit board 5 are sealed by a sealing member (not shown) such as an O-ring.

The first connector 2 and the second connector 3 correspond to the connector of the present invention, and are required to be dustproof between the outer peripheral walls 2a, 3a and the housing 6, respectively. Therefore, first and second protective members 14 and 15 as protective members are attached to the circumference of the first connector 2 and the circumference of the second connector 3 over the entire circumference.

The first protective member 14 is elastically deformable to follow the insertion of the first connector 2 when the first connector 2 is inserted into the first opening 11 from the inside of the housing 6, and the first opening 11 and the first protective member 14 are elastically deformable. 1 cover the gap between the connector 2 and the connector 2.

The second protective member 15 is elastically deformable following the insertion of the second connector 3 when the second connector 3 is inserted into the second opening 12 from the inside of the housing 6 , and the second opening 12 and the second protective member 15 are elastically deformable. 2 covers the gap between the connector 3 and the connector 3.

In order to avoid redundant description, the first protective member 14 of the first embodiment provided around the first connector 2 will be described in detail below. In addition, the second protective member 15 has the same configuration as the first protective member 14 .

The first protective member 14 of the first embodiment, as shown in FIGS. 3 to 6, is a substantially rectangular annular member as a whole. and an annular base 21 having a C-shaped cross section that sandwiches the , and an annular thin plate-like protection that closes the gap between the first opening 11 and the first connector 2 on the outside of the housing 6 (first case 7). and a portion (coating portion) 22 .

The protective portion 22 obliquely extends from the inner peripheral side of the base portion 21 toward the outer side of the housing 6 and the inner peripheral side of the first opening 11 . The protective portion 22 is formed to have a length that allows contact with the outer peripheral wall 2a of the first connector 2, and the gap between the first opening 11 and the first connector 2 is closed to the housing 6 (first case 7). can be covered from the outside.

The first protective member 14 is made of an elastically deformable material such as rubber or resin. In the first protective member 14, when the first connector 2 is inserted into the first opening 11 from the inside of the housing 6, the tip side of the protective portion 22 contacts the outer peripheral wall 2a of the first connector 2, and the protective portion 22 It is elastically deformable toward the outside of the housing 6 along the insertion direction of the 1 connector 2 .

The protective portion 22 of the first protective member 14 is provided with slits 23 at four corners on the inner peripheral side facing the four corners of the first connector 2 in order to enhance the followability to the first connector 2 .

The base 21 of the first protective member 14 is fixed to the opening edge of the first opening 11 by, for example, outsert molding. The first protective member 14 may be adhered to the edge of the first opening 11 with an adhesive or the like.

In the electronic control unit 1 of the first embodiment as described above, the gap between the first opening 11 and the first connector 2 is covered with the first protective member 14, so that dust resistance can be improved.

In addition, since the electronic control unit 1 can cover the gap between the first connector 2 and the first opening 11 of the housing 6 with the first protection member 14, the dimensional tolerance of the first opening 11 and the number of parts can be reduced. Assembly tolerances can be relaxed (enlarged), and part processing and assembly costs can be reduced.

Since the first protective member 14 is elastically deformable in the electronic control unit 1 , when the first protective member 14 comes into contact with the first connector 2 , abnormal noise is generated, the first connector 2 is damaged, and the first connector 2 is damaged. excessive application of external force (input of external force) can be suppressed.

In the electronic control unit 1, the first protective member 14 is fixed to the outer peripheral edge of the first opening 11 of the housing 6 by outsert molding, so that the first protective member 14 and the first case 7 (housing 6) are Since it is integrated, the assembling work of the first protective member 14 becomes unnecessary, and the assembling cost can be reduced.

Other embodiments of the present invention will be described below. The same reference numerals are assigned to the same components as those of the first embodiment described above, and overlapping descriptions are omitted.

An electronic control unit 31 according to a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a cross-sectional view of an electronic control unit 31 according to a second embodiment of the invention. The electronic control unit 31 of the second embodiment has substantially the same configuration as the electronic control unit 1 of the first embodiment described above. It is fixed to the outer surface 9b of the base portion 9 of the case 7 using an adhesive 34. As shown in FIG.

The first protective member 32 and the second protective member 33 of the second embodiment are rectangular plate-shaped annular members fixed to the outer surface 9b of the base portion 9 of the first case 7 with an adhesive 34. As shown in FIG. The first protective member 32 is fixed to the outer peripheral edge of the first opening 11 of the first case 7 with an adhesive 34 . The second protective member 33 is fixed to the outer peripheral edge of the second opening 12 of the first case 7 with an adhesive 34 .

The first protective member 32 in the second embodiment is elastically deformable following the insertion of the first connector 2 when the first connector 2 is inserted into the first opening 11 from the inside of the housing 6, and the first It covers the gap between the opening 11 and the first connector 2 .

The second protective member 33 in the second embodiment is elastically deformable following the insertion of the second connector 3 when the second connector 3 is inserted into the second opening 12 from the inside of the housing 6, and the second protective member 33 is elastically deformable. It covers the gap between the opening 12 and the second connector 3 .

In order to avoid redundant description, the first protective member 32 of the second embodiment provided around the first connector 2 will be described in detail below. The second protective member 33 of the second embodiment has the same configuration as the first protective member 32 of the second embodiment.

The first protective member 32 of the second embodiment includes a thin plate-like base portion 35 fixed to the outer peripheral edge of the first opening 11 and a gap between the first opening 11 and the first connector 2 in the first case 7 ( It has a thin-plate-like protective part (covering part) 36 that covers the outside of the housing 6).

The protective portion 36 of the second embodiment is a portion extending from the base portion 35 to the inner peripheral side of the first opening portion 11 . The protective portion 36 of the second embodiment is formed to have a length that allows contact with the outer peripheral wall 2a of the first connector 2, and the gap between the first opening 11 and the first connector 2 is formed into the housing 6 ( It is possible to cover from the outside of the first case 7).

The first protective member 32 of the second embodiment is made of an elastically deformable material such as rubber or resin, and is formed in a flat plate shape as a whole. In the first protective member 32 of the second embodiment, when the first connector 2 is inserted into the first opening 11 from the inside of the housing 6, the tip side of the protective portion 36 comes into contact with the outer peripheral wall 2a of the first connector 2. , the protective portion 36 is elastically deformable toward the outside of the housing 6 along the insertion direction of the first connector 2 .

Also in the first protective member 32 of the second embodiment, the protective portion 36 has slits (see FIG. not shown) are provided.

In the electronic control unit 31 of the second embodiment as described above, substantially the same effect as the electronic control unit 1 of the first embodiment described above can be obtained.

An electronic control unit 41 according to a third embodiment of the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view of an electronic control unit 41 according to a third embodiment of the invention. The electronic control unit 41 of the third embodiment has substantially the same configuration as the electronic control unit 1 of the first embodiment described above. It is fixed to the inner surface 9 a of the base portion 9 of the case 7 using an adhesive 44 .

The first protective member 42 and the second protective member 43 of the third embodiment are rectangular plate-shaped annular members, and are fixed to the inner surface 9a of the base portion 9 of the first case 7 with an adhesive 44. As shown in FIG. The first protective member 42 is fixed to the outer peripheral edge of the first opening 11 of the first case 7 with an adhesive 44 . The second protective member 43 is fixed to the outer peripheral edge of the second opening 12 of the first case 7 with an adhesive 44 .

The first protection member 42 in the third embodiment is elastically deformable following the insertion of the first connector 2 when the first connector 2 is inserted into the first opening 11 from the inside of the housing 6, It covers the gap between the opening 11 and the first connector 2 .

The second protective member 43 in the third embodiment is elastically deformable following the insertion of the second connector 3 when the second connector 3 is inserted into the second opening 12 from the inside of the housing 6. It covers the gap between the opening 12 and the second connector 3 .

In order to avoid redundant description, the first protective member 42 of the third embodiment provided around the first connector 2 will be described in detail below. The second protective member 43 of the third embodiment has the same configuration as the first protective member 42 of the third embodiment.

The first protective member 42 of the third embodiment includes a thin plate-like base portion 45 fixed to the outer peripheral edge of the first opening 11 and a gap between the first opening 11 and the first connector 2 in the first case 7 ( It has a thin-plate-shaped protective part (covering part) 46 that covers the housing 6) from the inside to the outside.

The protective portion 46 of the third embodiment is a portion extending from the base portion 45 toward the inner peripheral side of the first opening portion 11 . The protective portion 46 of the third embodiment is formed to have a length that allows contact with the outer peripheral wall 2a of the first connector 2, and the gap between the first opening 11 and the first connector 2 is formed into the housing 6 ( It is possible to cover from the inside to the outside of the first case 7).

The first protective member 42 of the third embodiment is made of an elastically deformable material such as rubber or resin, and is formed in a flat plate shape as a whole. In the first protective member 42 of the third embodiment, when the first connector 2 is inserted into the first opening 11 from the inside of the housing 6, the tip side of the protective portion 46 comes into contact with the outer peripheral wall 2a of the first connector 2. , the protective portion 46 is elastically deformable toward the outside of the housing 6 along the insertion direction of the first connector 2 .

Also in the first protective member 42 of the third embodiment, the protective portion 46 has slits (see FIG. not shown) are provided.

In the electronic control unit 41 of the third embodiment as described above, substantially the same effect as the electronic control unit 1 of the first embodiment described above can be obtained.

An electronic control unit 51 according to a fourth embodiment of the present invention will be described with reference to FIGS. 9 and 10. FIG. FIG. 9 is an explanatory diagram schematically showing an electronic control unit 51 according to a fourth embodiment of the invention. FIG. 10 is a cross-sectional view of an electronic control unit 51 according to a fourth embodiment of the invention.

The electronic control unit 51 of the fourth embodiment has substantially the same configuration as the electronic control unit 1 of the first embodiment described above, but the second connector 3 and the second opening 12 are omitted, and the protective member 52 is It is fixed to the outer peripheral wall 2 a of the first connector 2 .

The protective member 52 of the fourth embodiment is formed integrally with the outer peripheral wall 2a of the first connector 2, and is formed along the entire circumference of the outer peripheral wall 2a of the first connector 2, and the whole is approximately It is a rectangular annular member.

The protective member 52 in the fourth embodiment is elastically deformable following the insertion of the first connector 2 when the first connector 2 is inserted from the inside of the housing 6 into the first opening 11, and is elastically deformable. It covers the gap between 11 and the first connector 2 .

The protective member 52 of the fourth embodiment includes a brim-shaped bottom wall portion 53 connected to the outer peripheral wall 2a of the first connector 2, and a tip of the bottom wall portion 53 (peripheral end) to the tip side of the first connector 2. A vertical wall portion 54 extending in parallel with the outer peripheral wall 2a, and a vertical wall portion 54 connected to the distal end of the vertical wall portion 54, extending from the distal end side of the first connector 2 to the base end side of the first connector 2 on the circuit board 5 side. and an inclined wall portion 55 that is inclined (inclined) so as to move away from the outer peripheral wall 2 a of the first connector 2 .

The bottom wall portion 53 is orthogonal to the outer peripheral wall 2 a of the first connector 2 .

The vertical wall portion 54 is separated from the outer peripheral wall 2a of the first connector 2 by a predetermined distance.

The inclined wall portion 55 is formed so that the tip portion located on the base end side of the first connector 2 is located on the outer peripheral side of the first opening 11 . The inclined wall portion 55 is elastically deformable so that when the first connector 2 is inserted into the first opening 11 from the inside of the housing 6 , the tip portion moves toward the outer peripheral wall 2 a of the first connector 2 .

The protection member 52 of the fourth embodiment is provided with slits 56 in portions facing the four corners of the first connector 2 in order to improve the insertability when inserting the first connector 2 into the first opening 11 from the inside. ing.

In the electronic control unit 51 of the fourth embodiment as described above, substantially the same effect as the electronic control unit 1 of the first embodiment can be obtained.

Although specific embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

For example, the electronic control units 1, 31, 41, 51 may cover the outer surface and the inner surface of the first case 7 with a rubber material. In this case, the electronic control unit 1 can improve the impact resistance of the first case 7 and reduce the thickness of the first case 7 to reduce the cost. Similarly, the electronic control unit 1 may cover the outer surface and the inner surface of the second case 8 with a rubber material.

Further, if the electronic control units 1, 31, 41, 51 use a material having thermal conductivity for the first case 7 and the second case 8, heat dissipation can be improved.

In addition, the electronic control units 1, 31, 41 attach the first protective members 14, 32, 42 and the second protective members 15, 33, 43 to the outer peripheral wall 2a of the first connector 2 and the second protective members 15, 33, 43 instead of the first case 7. It may be adhered to the outer peripheral wall 3a of the connector 3 to cover the gap between the first opening 11 and the first connector 2 and the gap between the second opening 12 and the second connector 3. good.

As the electronic control unit based on each of the above-described embodiments, for example, the following modes are conceivable.

The electronic control device has a circuit board mounted with a connector to which terminals from the outside are attached, and a housing for accommodating the circuit board, and the housing has an opening through which the connector can pass. is formed around the opening or around the connector, and is elastically deformed following the insertion of the connector when the connector is inserted into the opening from the inside of the housing. A protective member is attached to cover the gap between the opening and the connector.

The protective member includes a base portion having a C-shaped cross section that sandwiches the inner side surface and the outer side surface of the housing, and a thin plate-shaped protective portion that closes the gap between the opening and the connector on the outside of the housing. wherein the base portion is fixed to the opening edge of the opening portion, and when the connector is inserted into the opening portion from the inside of the housing, the tip end side contacts the outer peripheral wall of the connector, and the connector is inserted. The protection part is elastically deformable toward the outside of the housing along the direction.

The protective member has a thin plate-like base fixed to the inner surface or the outer surface of the housing, and a thin plate-like protective portion that closes a gap between the opening and the connector, and the connector is inserted into the opening from the inside of the housing, the distal end side contacts the outer peripheral wall of the connector, and the protective portion is elastically deformable toward the outside of the housing along the insertion direction of the connector. ing.

The protective member is fixed to the outer peripheral wall of the connector, and is slanted away from the outer peripheral wall of the connector from the distal end side of the connector toward the base end side of the connector, which is the circuit board side. The inclined wall portion has a distal end portion located on the base end side of the connector located on the outer peripheral side of the opening, and the inclined wall portion moves the connector from the inside of the housing to the opening. The connector is elastically deformable so that the distal end portion moves toward the outer peripheral wall of the connector when the connector is inserted.

DESCRIPTION OF SYMBOLS 1... Electronic control unit, 2... 1st connector (connector), 2a... Perimeter wall, 3... 2nd connector (connector), 3a... Perimeter wall, 5... Circuit board, 6... Housing, 7... First case, 8 Second case 9 Base 9a Inner surface 9b Outer surface 10 Surrounding wall 11 First opening 12 Second opening 13 Third opening 14 Third 1 protective member (protective member), 15 second protective member (protective member), 21 base, 22 protective portion, 23 slit

Claims (4)

a circuit board on which a connector is mounted;
a housing that accommodates the circuit board,
The housing is formed with an opening through which the connector can pass,
Around the opening or around the connector, when the connector is inserted into the opening from the inside of the housing, elastically deformable following the insertion of the connector, the opening and the connector are elastically deformable. An electronic control device characterized in that a protective member is attached to cover a gap between the. The protective member has a base having a C-shaped cross section that sandwiches the inner and outer surfaces of the housing, and a protective portion that closes a gap between the opening and the connector, and the base is 2. The electronic device according to claim 1, wherein the protective portion is fixed to the opening edge of the opening and is elastically deformable when the connector is inserted into the opening from the inside of the housing. Control device. The protective member has a base portion fixed to the inner side surface or the outer side surface of the housing, and a protective portion closing a gap between the opening and the connector, and the connector is positioned inside the housing. 2. The electronic control device according to claim 1, wherein the protective portion is elastically deformable when the protective portion is inserted into the opening. The protective member is fixed to the connector, and is an inclined wall that is inclined away from the outer peripheral wall of the connector from the distal end side of the connector toward the base end side of the connector, which is the circuit board side. has a part
The inclined wall portion has a tip portion positioned on the base end side of the connector positioned on the outer peripheral side of the opening, and the tip portion is positioned on the outer peripheral side of the opening when the connector is inserted into the opening from the inside of the housing. 2. The electronic control device according to claim 1, wherein the connector is elastically deformable so as to move toward the outer peripheral wall of the connector.

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