CN213043952U - Electronic control device - Google Patents

Abstract

An electronic control device comprising: the outer cover is provided with a top wall, a side wall and an accommodating space formed by the top wall and the side wall in a surrounding mode, the outer cover is provided with a first opening communicated with the accommodating space along the inserting direction and a second opening communicated with the accommodating space along the mounting direction, the top wall is provided with a notch portion extending from the edge of the top wall at the first opening to the inserting direction, a limiting portion is arranged on the inner surface of the top wall, and a buffer groove is formed between the limiting portion and the side wall; a printed circuit board assembly mounted in the accommodating space; the electric connector is arranged at the first opening and is electrically connected to the printed circuit board assembly, and the electric connector comprises an insulating body, wherein the insulating body is provided with an upper edge protruding towards the top wall; and the top wall and the side wall protrude out of the edge of the bottom plate when the bottom plate closes the second opening. The electronic control device can prevent the outer cover from being broken and the internal structure from being damaged when the electronic control device is dropped.

Description

Electronic control device

Technical Field

The utility model relates to a controlling means especially relates to an electronic control device for controlling on-vehicle gasbag.

Background

Control devices applied to motor vehicles, such as electronic control devices that control vehicle-mounted airbags, are generally equipped with a housing adapted to be mounted on a structural part of the motor vehicle. The printed circuit board has various electronic components necessary for supporting the electronic control device to function in the housing. In addition, the housing is fitted with electrical connectors for wiring, which provide communication with sensors, actuators or other control devices.

When the electronic control device is assembled to a structural component of a motor vehicle, the electronic control device may fall due to an operational error to cause damage to the electronic control device, such as breakage of a housing and damage to electronic components inside the electronic control device, thereby affecting the electronic control device to accurately detect an external physical quantity and normally activate the vehicle-mounted airbag. In the existing design, a relatively rigid material is generally used at a falling part which is easy to contact with the ground, for example, a support leg arranged on a shell and used for being installed on a structural component of a motor vehicle is made of a metal material, so that when the electronic control device falls, the metal support leg firstly contacts the metal support leg, and the metal support leg absorbs most energy to protect the electronic control device. However, some electronic control devices are designed to require a design that does not allow the use of a stiffer material for the areas that are likely to contact the ground when dropped.

Therefore, a new technical scheme is needed to realize protection when the electronic control device falls.

SUMMERY OF THE UTILITY MODEL

The electronic control device aims to overcome the defects and solve the problem that the electronic control device is damaged after falling in the prior art.

In some embodiments of the present invention, there is provided an electronic control device, comprising: the outer cover is provided with a top wall, a side wall and an accommodating space formed by the top wall and the side wall in a surrounding mode, the outer cover is provided with a first opening communicated with the accommodating space along the inserting direction and a second opening communicated with the accommodating space along the mounting direction, the top wall is provided with a notch part, the notch part extends towards the inserting direction from the edge of the top wall at the first opening, a limiting part is arranged on the inner surface of the top wall, and a buffer groove is formed between the limiting part and the side wall; a printed circuit board assembly mounted in the receiving space; the electric connector is arranged at the first opening and is electrically connected to the printed circuit board assembly, the electric connector comprises an insulating body, an upper edge protruding towards the top wall is arranged on the insulating body, and when the electric connector is arranged at the first opening from the second opening along the installation direction, the upper edge is matched with the limiting part to fix the insulating body; the bottom plate closes the second opening, and when the bottom plate closes the second opening, the top wall and the side wall protrude out of the edge of the bottom plate.

Further, the side walls comprise a first side wall, a second side wall and a third side wall, wherein the first side wall and the second side wall are oppositely arranged, and the third side wall is connected with the first side wall and the second side wall; wherein the first side wall, the second side wall, and the top wall define the first opening; spacing portion includes third sand grip and fourth sand grip that the interval set up on the internal surface of roof, the third sand grip with the fourth sand grip is in first side wall with extend between the second side wall, the upper edge by the installation direction embedding the third sand grip with between the fourth sand grip and with the third sand grip with fourth sand grip clearance fit.

Further, the inner surface of the side wall is provided with a clamping portion, the insulating body is provided with a side edge protruding towards the inner surface of the side wall, and the clamping portion is matched with the side edge to clamp the insulating body when the upper edge is installed in the first opening from the second opening along the installation direction.

Further, the first side wall and the second side wall define the second opening, the clamping portion includes a first protruding strip and a second protruding strip spaced apart from each other on inner surfaces of the first side wall and the second side wall, the first protruding strip and the second protruding strip extend from the inner surface of the top wall to the second opening, the first protruding strip has a first sub-protruding strip protruding toward the second protruding strip, the first sub-protruding strip extends to the inner surface of the top wall, a distance between the first sub-protruding strip and the second protruding strip gradually decreases when the first sub-protruding strip approaches the inner surface of the top wall, and when the electrical connector is mounted in the first opening, the side edge is inserted between the first protruding strip and the second protruding strip to be in interference fit with the first protruding strip and the second protruding strip.

Further, the first and second side walls define the second opening, the insulating body has a fifth rib protruding toward the side walls and spaced apart from the side edges, the fifth rib has a rib protruding toward the side edges, the clamping portion includes second ribs respectively disposed on inner surfaces of the first and second side walls, the second rib extends from the inner surface of the top wall toward the second opening, and when the electrical connector is mounted in the first opening, the second rib is inserted between the fifth rib and the side edges to be in interference fit with the fifth rib and the side edges.

Further, the inner surfaces of the first side wall and the second side wall are further provided with first protruding strips arranged at intervals with the second protruding strips, the first protruding strips and the second protruding strips extend from the inner surface of the top wall to the second opening, the first protruding strips are provided with first sub protruding strips protruding towards the second protruding strips, the first sub protruding strips extend to the inner surface of the top wall, the distance between the first sub protruding strips and the second protruding strips is gradually reduced when the first sub protruding strips are close to the inner surface of the top wall, and when the electric connector is installed in the first opening, the side edges are embedded between the first protruding strips and the second protruding strips to be in interference fit with the clamping portions.

Further, the third convex strip and the first convex strip are located in the same plane, the third convex strip is connected to the first convex strip, the fourth convex strip and the second convex strip are located in the same plane, the fourth convex strip is connected to the second convex strip, the third convex strip is close to the first convex strip and is provided with a first gap, the fourth convex strip is close to the second convex strip and is provided with a second gap, and the first gap and the second gap form the buffer groove.

Further, first sand grip extends to through the circular arc chamfer the internal surface of roof, first sand grip with first breach has between the third sand grip, the second sand grip extends to through the circular arc chamfer the internal surface of roof, the second sand grip with the second breach has between the fourth sand grip, first breach with the second breach forms the dashpot.

Further, the housing is made of plastic, the top wall has a protruding eave for covering the electrical connector when the electrical connector is installed in the first opening, the first side wall and the second side wall have a first shielding portion and a second shielding portion respectively for shielding the electrical connector when the electrical connector is installed in the first opening, the protruding eave is connected with the first shielding portion and the second shielding portion respectively, the bottom plate closes the second opening, the protruding eave and the shielding portion protrude out of the edge of the bottom plate, the thickness of the top wall and the thickness of the side wall are 1.5 mm, and the thickness of the first shielding portion and the thickness of the second shielding portion are 1.8 mm to 2.1 mm

Further, the convex eaves, the first shielding portion and the second shielding portion are provided with flanges protruding towards the first opening at edges of the first opening, and the thickness of the flanges is 1.2 mm to 1.6 mm.

It can be seen from the above that, the inner surface of the top wall of the outer cover of the electronic control device provided by the application is provided with the buffer groove between the limiting part and the clamping part, so that the electronic control device can avoid the impact force from concentrating on the junction of the top wall and the side wall to cause the fragmentation of the outer cover under the condition that the electronic control device firstly contacts the ground when falling and is the outer cover. Compared with the prior art, the electronic control device provided by the embodiment of the application can avoid the damage to the outer cover and the inner structure after falling.

Drawings

The features, characteristics, advantages and benefits of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

Fig. 1 shows a perspective view of an electronic control device according to an embodiment.

Fig. 2 shows a top view of the electronic control device of fig. 1.

Fig. 3 is an exploded view of the electronic control device shown in fig. 1.

Fig. 4 is a perspective view showing an electrical connector of the electronic control device of fig. 3.

Fig. 5 is a partial structural diagram of the electrical connector shown in fig. 4.

Fig. 6 is a schematic perspective view of the housing of the electronic control device in fig. 3.

Fig. 7 is a partial structural schematic diagram of the housing of the electronic control device in fig. 6.

Fig. 8 is a perspective view of the housing of the electronic control device of fig. 3 from another angle.

Fig. 9 is a partial structural schematic diagram of the housing of the electronic control device in fig. 8.

FIG. 10 is a partial structural view of a sidewall of the electronic control device of FIG. 8.

Fig. 11 is a schematic cross-sectional view along C-C of the electronic control device of fig. 2 without the electrical connector.

Fig. 12 is a schematic cross-sectional view of the electronic control device of fig. 2 without the electrical connector in a direction C-C according to another embodiment.

Fig. 13 is a schematic cross-sectional view of the electronic control device of fig. 1 along the direction B-B.

Detailed Description

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 3, there is shown an electronic control device according to an embodiment of the present invention, which is a control device having a housing in the shape of a rectangular parallelepiped or a substantially cuboid. The control device in this embodiment controls the operation of an on-vehicle airbag of a motor vehicle. Specifically, the control device is provided in a relatively safe area of the vehicle, such as an area commonly referred to as a tunnel between a driver seat and a passenger seat, for an electronic control device 10 for igniting an ignition device of an in-vehicle airbag upon a collision accident of the vehicle.

Fig. 3 shows an exploded view of the electronic control device 10. The electronic control device 10 includes: housing 20, printed circuit board assembly 30, backplane 40, and electrical connector 50. The cover 20 has a box-like structure, and the printed circuit board assembly 30 is mounted in the receiving space a so that the cover 20 can protect the printed circuit board assembly 30. The cover 20 is injection molded from a plastic, such as glass fiber reinforced polypropylene, so that the cover 20 can deform and absorb energy generated by an external impact. The housing 20 includes a top wall 21 and side walls 22, the side walls 22 extending from edges of the top wall 21 generally perpendicular to the top wall 21 and being continuously disposed around the top wall 21. The top wall 21 and the side walls 22 enclose a three-dimensional receiving space a forming the housing 20, the housing 20 having a first opening 23 communicating with the receiving space a in a plugging direction D2 and a second opening 24 communicating with the receiving space a in a mounting direction D1 perpendicular to the plugging direction D2. Referring to fig. 1 and 2, the sidewall 22 includes first and second sidewalls 221 and 222 disposed opposite and substantially parallel to each other and a third sidewall 223 connecting the first and second sidewalls 221 and 222, the third sidewall 223 being substantially perpendicular to the first and second sidewalls 221 and 222. The first side wall 221, the second side wall 222, and the top wall 20 define a first opening 23, and the third side wall 223 is disposed opposite the first opening 23. The first and second sidewalls 221 and 222 define the second opening 24, in this embodiment, the third sidewall 233 may also define the second opening 24 together with the first and second sidewalls 221 and 222, and in some other embodiments, the third sidewall 223 may also be another device, such as a connector.

The printed circuit board assembly 30 is a planar device, and the printed circuit board assembly 30 includes electronic components mounted thereon for controlling the operation of the vehicle airbag. Referring to fig. 1 and 2, the printed circuit board assembly 30 is connected to an electrical connector 50 for connection and communication with an external device. The electrical connector 50 includes an insulating body 51 and a plurality of conductive terminals 52, and the insulating body 51 is an integrated member made of synthetic resin such as PBT plastic (thermoplastic polyester) divided into a plurality of connection ports according to connection objects thereof. In the present embodiment, the insulating body 51 includes three connection ports 53 provided side by side and connected to external devices, respectively, and the three connection ports 53 are connected to the external devices through the wire harness while facing the outside of the housing 20 through the first opening 23.

Referring to fig. 4 and 5, the electrical connector 50 has a plurality of conductive terminals 52 received in three connecting ports 53, and the conductive terminals 52 are electrically connected to the wiring circuit pattern in the pcb assembly 30. External devices such as sensors, actuators, etc. connected to the plurality of conductive terminals 52 may make electrical connection to the printed circuit board assembly 30.

The electrical connector 50 is secured to the printed circuit board assembly 3 by a plurality of conductive terminals 52 extending into apertures provided on the printed circuit board assembly 30. Further, the electrical connector 50 may also be fixed to the printed circuit board assembly 3 by using a small screw or the like. When the printed circuit board assembly 30 is mounted into the housing 20 from the second opening 24 along the mounting direction D1, the electrical connector 5 is mounted to the first opening 23 of the housing 2.

The electrical connector 5 also has a frame surrounding the three connection ports 53 for stopping against the housing 20 when the electrical connector 50 is mounted to the first opening 23. Specifically, the insulating body 51 is provided with a raised upper edge 54 facing the top wall 21 and raised side edges 55 facing the first side wall 221 and the second side wall 222, respectively, the upper edge 54 and the side edges 55 being connected to form a frame surrounding the insulating body 51. It should be understood that the upper edge 54 and the side edge 55 can be formed on a plane to form a frame surrounding the insulating body 51 in this embodiment, and in other embodiments, the upper edge 54 and the side edge 52 can be formed on different planes.

As shown in fig. 5, the side surfaces of the insulating body 51 facing the first side wall 221 and the second side wall 222 are further provided with fifth ribs 56 spaced from and substantially parallel to the side edge 55, respectively, and the fifth ribs 56 are provided with ribs 561 protruding toward the side edge 55. The fifth protrusion 56 penetrates a side surface of the insulating body 51.

Referring to fig. 6 to 10 and fig. 13, the housing 20 has a limiting portion 25 and a clamping portion 26, and the electrical connector 50 is mounted to the first opening 23 through the limiting portion 25 and the clamping portion 26 without relative movement with respect to the housing 20.

Specifically, the stopper portion 25 and the clamping portion 26 are formed on the top wall 21 and the side wall 22, respectively, wherein the two clamping portions 26 are formed on the inner surfaces of the first side wall 221 and the second side wall 222, respectively, facing the receiving space a, near the first opening 23. The clamping portion 26 includes first and second protrusions 261 and 262 spaced from each other and substantially parallel to each other. The first and second protruding strips 261 and 262 are formed by the inner surfaces of the first and second sidewalls 221 and 222 protruding and are integrally formed with the cover 20. The first protruding strip 261 and the second protruding strip 262 extend continuously from the inner surface of the top wall 21 to the inner surfaces of the first side wall 221 and the second side wall 222. The first protruding strip 261 has a first sub protruding strip 2611 protruding toward the second protruding strip 262, and the first sub protruding strip 2611 extends to the inner surface of the top wall 21. The distance between the first sub-protrusion 2611 and the second protrusion 262 gradually decreases as it approaches the inner surface of the top wall 21.

The stopper portion 25 is formed on an inner surface of the top wall 21 near the first opening 23 toward the housing space a. The stopper 25 includes a third protruding strip 263 and a fourth protruding strip 264 which are disposed at an interval and are substantially parallel to each other. The third and fourth protruding strips 263 and 264 are formed protrusively from the inner surface of the top wall 21 and are formed integrally with the cover 20. The third and fourth ribs 263, 264 extend between the first and second side walls 221, 222 along the edge of the top wall 21 at the first opening 23.

In addition, as shown in fig. 7 to 9, a buffer groove 27 is provided between the limiting portion 25 and the clamping portion 26, and the buffer groove 27 is located on the inner surface of the top wall 21. specifically, the third protrusion 263 is connected to the first protrusion 261, the fourth protrusion 264 is connected to the second protrusion 262, the third protrusion 263 has a first notch 271 near the first protrusion 261, the fourth protrusion 264 has a second notch 272 near the second protrusion 262, and the first notch 271 and the second notch 272 form the buffer groove 27. Referring to fig. 11 and 12, as shown in fig. 12, the first notch 271 and the second notch 272 may be chamfered or rounded as shown in fig. 11 on the third convex strip 263 and the fourth convex strip 264.

With continued reference to fig. 9, the first protrusion 261 extends to the inner surface of the top wall 21 by an arc chamfer to connect with the third protrusion 263, the first notch 271 is formed at the arc chamfer, and similarly, the second protrusion 262 extends to the inner surface of the top wall 21 by an arc chamfer to connect with the fourth protrusion 264, and the second notch 272 is formed at the arc chamfer. The buffer grooves 27 may have different depths, in this embodiment, the first notch 271 and the second notch 272 penetrate the third protrusion 263 and the fourth protrusion 264 to reach the inner surface of the top wall 21, at this time, the third protrusion 263 is disconnected from the first protrusion 261, and the fourth protrusion 264 is disconnected from the second protrusion 262. In other embodiments, the first notch 271 and the second notch 272 may not penetrate the third protrusion 263 and the fourth protrusion 264.

During the process of mounting the electrical connector 50 from the second opening 24 to the first opening 23 of the housing 20 along the mounting direction D1, the two side edges 55 of the insulating body 51 first cooperate with the two clamping portions 26 to clamp the electrical connector 50, specifically, the two side edges 55 are respectively inserted between the first protruding strip 261 and the second protruding strip 262, because the first protruding strip 261 has the first sub-protruding strip 2611, an interference fit is achieved between the two side edges 55 and the clamping portions 26 so that the clamping portions 26 clamp the side edges 55. Meanwhile, the second rib 262 is inserted between the fifth rib 56 and the side edge 55 to be in interference fit with the fifth rib 56 and the side edge 55. Then, the upper edge 54 is inserted between the third protruding strip 263 and the fourth protruding strip 264 until stopping against the inner surface of the top wall 21, and the upper edge 54, the third protruding strip 263 and the fourth protruding strip 264 are in clearance fit to realize the limit of the upper edge 54. Thus, the electrical connector 50 is mounted to the first opening 23 by the double clamping design in which the side edge 55 is clamped by the clamping portion 26 including the first projecting strip 261 and the second projecting strip 262 is clamped by the fifth projecting strip 56 and the side edge 55, and the stopper portion 25 including the first projecting strip 261 and the second projecting strip 262, and no relative movement occurs between the electrical connector 50 and the housing 20.

Further, refer to fig. 1 to 3 in combination with fig. 9 and 10. The top wall 21 has a protruding edge 211 for covering the electrical connector 50 when the electrical connector is mounted in the first opening 23, the first side wall 221 and the second side wall 222 also have a first shielding portion 2211 and a second shielding portion 2221 for shielding the electrical connector 50 when the electrical connector 50 is mounted in the first opening 23, the protruding edge 211 is connected to the first shielding portion 2211 and the second shielding portion 2221, the protruding edge 211 has a notch portion 212 extending from ends of the first shielding portion 2211 and the second shielding portion 2221 along the mounting direction D1, when the bottom plate 40 closes the second opening 24, the protruding edge 211 and the first shielding portion 2211 and the second shielding portion 2221 protrude from an edge of the bottom plate 40, and the notch portion 212 facilitates observation of insertion and extraction of the wiring harness when the electronic control device 10 is connected to an external device. The thickness of the top wall 21 and the side wall 22 of the electronic control device 10 is 1.5 mm, while the thickness of the first and second shielding portions 2211 and 2221 is 1.8 mm to 2.1 mm, for example 1.9 mm, in some embodiments the thickness of the first and second shielding portions 2211 and 2221 is 2 mm, in some embodiments the thickness of the first and second shielding portions 2211 and 2221 is 2.1 mm.

In addition, the top wall 21, the first side wall 221 and the second side wall 222 have a continuous flange 28 protruding toward the first opening 23 at the edge of the first opening 23, the flange 28 is hemispherical, and the thickness (i.e., the radius of the hemispherical shape) of the flange 28 is 1.2 mm to 1.6 mm, such as 1.3 mm, in some embodiments, the thickness of the flange 28 is 1.5 mm, and in other embodiments, the thickness of the flange 28 is 1.5 mm.

When the electronic control device 10 falls in the X direction in fig. 2, since the eaves 211 and the shielding portions 2211 and 2221 protrude from the edge of the base plate 40, and the eaves 211 includes the notch portion 212, the first shielding portion 2211 and the second shielding portion 2221 of the first side wall 221 and the second side wall 222 contact the ground first, and then the impact force propagates along the edge of the eaves 211 toward the side wall 22 and spreads to the housing 20. The buffer groove 27 is arranged on the path of the impact force propagation, and when the impact force propagates to the buffer groove 27, the impact force can be expanded to other parts of the outer cover 20 through the buffer groove 27 so as to avoid the impact force from concentrating at the boundary of the top wall 21 and the side wall 22 to cause the fragmentation of the outer cover 20. And since the housing 20 is made of plastic, the first and second side walls 221 and 222, particularly the shielding portion 2211 and 2221, can be bent in the Y direction in fig. 2 due to the buffer groove 27 to absorb a part of the impact force. Meanwhile, the arrangement of the flange and the thickening of the first shielding portion 2211 and the second shielding portion 2221 also improves the rigidity of the outer cover 20, and the outer cover 20 is not easily brittle when falling.

Disclosed herein is an electronic control device 10 having a buffer groove 27 between a stopper portion 25 and a holding portion 26 on an inner surface of a top wall 21 of a housing 20, whereby in the case where the electronic control device 10 is the housing 20 which first contacts the ground when falling, it is possible to avoid the impact force from concentrating at the boundary of the top wall 21 and a side wall 22 to cause the housing 20 to be broken. It can be seen that, compared with the prior art, the electronic control device 10 provided by the embodiment of the present application can avoid the outer cover from being broken and the internal structure from being damaged after the electronic control device is dropped.

Claims (10)

1. An electronic control device, comprising:

the outer cover is provided with a top wall, a side wall and an accommodating space formed by the top wall and the side wall in a surrounding mode, the outer cover is provided with a first opening communicated with the accommodating space along the inserting direction and a second opening communicated with the accommodating space along the mounting direction, the top wall is provided with a notch part, the notch part extends towards the inserting direction from the edge of the top wall at the first opening, a limiting part is arranged on the inner surface of the top wall, and a buffer groove is formed between the limiting part and the side wall;

a printed circuit board assembly mounted in the receiving space;

the electric connector is arranged at the first opening and is electrically connected to the printed circuit board assembly, the electric connector comprises an insulating body, an upper edge protruding towards the top wall is arranged on the insulating body, and when the electric connector is arranged at the first opening from the second opening along the installation direction, the upper edge is matched with the limiting part to fix the insulating body;

the bottom plate closes the second opening, and when the bottom plate closes the second opening, the top wall and the side wall protrude out of the edge of the bottom plate.

2. The electronic control device according to claim 1, wherein the side walls include a first side wall, a second side wall, and a third side wall connecting the first side wall and the second side wall, which are oppositely disposed; wherein the first side wall, the second side wall, and the top wall define the first opening; spacing portion includes third sand grip and fourth sand grip that the interval set up on the internal surface of roof, the third sand grip with the fourth sand grip is in first side wall with extend between the second side wall, the upper edge by the installation direction embedding the third sand grip with between the fourth sand grip and with the third sand grip with fourth sand grip clearance fit.

3. The electronic control device as claimed in claim 2, wherein the side wall has a clamping portion on an inner surface thereof, the insulating body has a side edge protruding toward the inner surface of the side wall, and the upper edge is fitted to the first opening from the second opening in the fitting direction, and the clamping portion clamps the insulating body in cooperation with the side edge.

4. The electronic control device of claim 3, wherein the first and second side walls define the second opening, the clamping part comprises a first convex strip and a second convex strip which are arranged on the inner surfaces of the first side wall and the second side wall at intervals respectively, said first rib and said second rib extending from said top wall inner surface toward said second opening, the first convex strip is provided with a first sub convex strip protruding towards the second convex strip, the first sub convex strip extends to the inner surface of the top wall, the distance between the first sub-bead and the second bead gradually decreases as the first sub-bead approaches the inner surface of the top wall, the electric connector is installed in when first opening, the lateral margin embedding between first sand grip and the second sand grip with first sand grip and second sand grip interference fit.

5. The electrical control device of claim 3, wherein said first and second side walls define said second opening, said insulating body having a fifth rib projecting toward said side walls and spaced from said side edges, said fifth rib having a rib projecting toward said side edges, said clamping portion including a second rib provided on an inner surface of said first and second side walls, respectively, said second rib extending from said top wall inner surface toward said second opening, said second rib engaging between said fifth rib and said side edges in interference engagement with said fifth rib and said side edges when said electrical connector is mounted in said first opening.

6. The electronic control device of claim 5, wherein said first and second sidewalls further have first ribs spaced from said second ribs on their inner surfaces, said first and second ribs extending from said inner surface of said top wall toward said second opening, said first ribs having first sub-ribs projecting toward said second ribs, said first sub-ribs extending to said inner surface of said top wall, a distance between said first sub-ribs and said second ribs gradually decreasing as said first sub-ribs approach said inner surface of said top wall, said side edge engaging between said first and second ribs to form an interference fit with said gripping portion when said electrical connector is mounted in said first opening.

7. The electronic control device of claim 4 or 6, wherein the third rib and the first rib are in a same plane, the third rib is connected to the first rib, the fourth rib and the second rib are in a same plane, the fourth rib is connected to the second rib, the third rib has a first notch near the first rib, the fourth rib has a second notch near the second rib, and the first notch and the second notch form the buffer slot.

8. The electronic control device according to claim 7, wherein the first rib extends to the inner surface of the top wall by an arc chamfer, a first gap is provided between the first rib and the third rib, the second rib extends to the inner surface of the top wall by an arc chamfer, a second gap is provided between the second rib and the fourth rib, and the first gap and the second gap form the buffer groove.

9. The electronic control device according to claim 8, wherein the housing is made of plastic, the top wall has a protruding edge that covers the electrical connector when the electrical connector is mounted in the first opening, the first and second side walls have first and second shielding portions, respectively, that shield the electrical connector when the electrical connector is mounted in the first opening, the protruding edge connects the first and second shielding portions, respectively, the bottom plate closes the second opening, the protruding edge and the shielding portion protrude from an edge of the bottom plate, the top wall and the side walls have a thickness of 1.5 mm, and the first and second shielding portions have a thickness of 1.8 mm to 2.1 mm.

10. The electronic control device according to claim 9, wherein the flange protruding toward the first opening is provided at an edge of the first opening, and the flange has a thickness of 1.2 mm to 1.6 mm.

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