CN209787642U - Electronic control unit - Google Patents

Abstract

The utility model provides an electronic control unit, it includes first casing, second casing, circuit board and waterproof ventilative mechanism. An accommodating space for accommodating the circuit board is arranged between the first shell and the second shell. The waterproof ventilating mechanism is connected with the accommodating space. The waterproof breathable mechanism comprises a base, a waterproof breathable film and a protective cover. The base is provided with a through hole connected with the accommodating space and a positioning boss surrounding the through hole. The visor includes tip and the lateral wall that extends to the base direction from the tip, and the through-hole is shielded to waterproof ventilated membrane. The side wall is matched with the positioning boss, and the protective cover and the base are fixed together in an assembling mode. The utility model provides an electronic control unit is through setting up waterproof ventilative structure, can reduce the water and get into the inside possibility of electronic control unit. The lateral wall of visor cooperatees with the location boss, can play the effect of location, can also reduce the possibility that external water got into the visor inside simultaneously betterly.

Description

Electronic control unit

Technical Field

The utility model relates to an electronic control unit, especially an electronic control unit with waterproof ventilated membrane.

Background

The electronic control unit has electronic components inside. In order to avoid the electronic components from being damaged by moisture, the electronic control unit should have good waterproof effect. Therefore, the electronic control unit that needs to be waterproof needs to have good sealing property.

In order to have a good sealing, the prior art has adopted a way of sealing the housings together well. When such an electronic control unit is used in a situation where the ambient temperature changes relatively greatly, the electronic control unit may be damaged due to pressure changes caused by the temperature changes. In order to solve the above technical problem, a waterproof and breathable film is generally disposed on the housing. Since the waterproof breathable film is fragile and easily damaged by external force, a protection mechanism is generally disposed outside the waterproof breathable film.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an equipment is convenient, and can play better water-proof effects's electronic control unit.

According to an aspect of the present invention, there is provided an electronic control unit, which includes a first housing, a second housing, a circuit board, and a waterproof and breathable mechanism. An accommodating space for accommodating the circuit board is arranged between the first shell and the second shell. The waterproof ventilating mechanism is connected with the accommodating space. The waterproof breathable mechanism comprises a base, a waterproof breathable film and a protective cover. The base is provided with a through hole connected with the accommodating space and a positioning boss surrounding the through hole. The visor includes tip and the lateral wall that extends to the base direction from the tip, and the through-hole is shielded to waterproof ventilated membrane. The side wall is matched with the positioning boss, and the protective cover and the base are fixed together in an assembling mode.

Preferably, the positioning boss is provided with at least one groove, and the groove is open on three sides.

Preferably, the side wall is located at the outer side of the positioning boss, and the inner surface of the side wall is in clearance fit with the outer surface of the positioning boss.

Preferably, the groove is provided with a bottom surface, the base is provided with an installation surface for installing the waterproof breathable film, and the bottom surface and the installation surface are located on the same plane.

Preferably, in use, the mounting surface is located on a vertical surface.

Preferably, the side wall is provided with a notch and an elastic clamping part positioned in the notch, and the base is provided with a clamping seat which is used for being matched with the elastic clamping part and is provided with a clamping hole.

Preferably, the elastic clamping parts are at least two and uniformly distributed, and the clamping seats and the elastic clamping parts are arranged in a one-to-one correspondence manner.

Preferably, the retaining seat is located outside of the positioning boss, and the side wall and the positioning boss are both cylindrical.

Preferably, the notch and the groove are arranged in a staggered manner.

Preferably, the electronic control unit further comprises a first connector fixed to the first housing, the first connector is provided with a connection space communicated with the accommodating space, the base is arranged on the first connector, and the through hole is connected with the connection space.

The utility model provides an electronic control unit is through setting up waterproof ventilative structure, can reduce the water and get into the inside possibility of electronic control unit. The lateral wall of visor cooperatees with the location boss, can play the effect of location, can also reduce the possibility that external water got into the visor inside simultaneously betterly.

Drawings

Fig. 1 is a perspective view of an electronic control unit according to the present invention.

Fig. 2 is an exploded perspective view of the electronic control unit of the present invention.

Fig. 3 is an enlarged view at "a" in fig. 2.

Fig. 4 is a front view of the electronic control unit.

Fig. 5 is a sectional view taken along line "B-B" in fig. 4.

Fig. 6 is an enlarged view at "D" in fig. 5.

Fig. 7 is a sectional view taken along the direction "C-C" in fig. 4.

Fig. 8 is an enlarged view at "E" in fig. 7.

Fig. 9 is a sectional view taken along the direction "F-F" in fig. 8.

Detailed Description

Referring to fig. 1 to 9, the present invention provides an electronic control unit 100, which includes a first housing 3, a second housing 1, a circuit board 2, a first connector 4, a second connector 5, and a waterproof and breathable structure 6. Fig. 1 shows a schematic view of the first connector 4 connected to the external connector 8. An accommodating space 7 for accommodating the circuit board 2 is provided between the first housing 3 and the second housing 1.

The first housing 3 is provided with a first opening 31 and a second opening 32. The first opening 31 is used for connecting the first connector 4 and the second opening 32 is used for connecting the second connector 5. The opening directions of the first opening 31 and the second opening 32 are the same. Since the first connector 4 and the second connector 5 are provided with the wire terminals, the wire terminals can be connected with the circuit board 2 through the first opening 31 and the second opening 32.

The first contact 4 has a connection space 41 communicating with the housing space 7, the base 63 is provided on the first contact 4, and the through hole 633 is connected to the connection space 41. In the present embodiment, the base 63 is provided on the first connector 4, but is not limited thereto. The base 63 may be provided on the first housing 3, the second housing 1, or the second connector 5.

In the present embodiment, the base 63 is a part of the first connector 4. The housing of the first connector 4 is a plastic part, and the base 63 is formed by injection molding when the first connector 4 is molded.

The waterproof and breathable mechanism 6 comprises a base 63, a waterproof and breathable film 62 and a protective cover 61. The base 63 is provided with a through hole 633 connected to the housing space 7 and a positioning boss 631 surrounding the through hole 633. The protective cover 61 includes an end 611 and a sidewall 612 extending from the end 611 toward the base 63. The through hole 633 is shielded by the waterproof breathable film 62, and the side wall 612 is matched with the positioning boss 631. The protective cover 61 and the base 63 are fixed together by means of assembly. The positioning boss 631 is matched with the side wall 612 to position the protection cover 61. The protective cover 61 can protect the waterproof breathable film 62, so as to prevent an external object from directly colliding with the waterproof breathable film 62 to damage the waterproof breathable film 62, and the end 611 and the side wall 612 of the protective cover 61 can also reduce the possibility that external water enters the protective cover 61. Even if water enters the inside of the protective cover 61, the waterproof breathable film 62 can further reduce the possibility of water entering the inside of the housing space 7. When the temperature of the environment where the electronic control unit 100 is used changes, the pressure generated by the temperature change in the accommodating space 7 is released through the waterproof breathable film 62, so as to prevent the electronic control unit from being damaged by the pressure change.

The retaining seat 632 is located outside the positioning boss 631, and the sidewall 612 and the positioning boss 631 are cylindrical, but are not limited to be cylindrical, and may be in other shapes.

The positioning boss 631 is provided with at least one groove 6312, and the groove 6312 is open on three sides. Preferably, there are 4 grooves. The positioning boss 631 is divided into a plurality of land portions 6311 by the groove 6312. The number of the through holes 633 is 4, but other numbers may be provided. Through setting up a plurality of through-holes 633, when sheltering from through-hole 633 with waterproof ventilated membrane 62, can play the supporting role to through-hole 633 by the connecting portion between the through-hole 633, reduce waterproof ventilated membrane 62 because of the possibility of atress damage. The groove 6312 is provided with a bottom surface 63121, the base 63 is provided with a mounting surface 6331 for mounting the waterproof breathable film 62, and the bottom surface 63121 and the mounting surface 633 are located on the same plane. The waterproof breathable membrane 62 may be secured to the mounting surface 6331 by crimping.

In use, the mounting surface 6331 is located on a surface that is disposed obliquely to the horizontal plane, and preferably, the mounting surface 6331 is located on a vertical plane. With this arrangement, when water exists in the protective cover 61, i.e., in the upper space of the waterproof protective film 62, the water can be drained through the groove 6312.

The sidewall 612 is provided with a notch 6123 and an elastic retaining member 6121 located in the notch 6123. The base 63 is provided with a retaining seat 632 with a retaining hole 6321 for cooperating with the elastic retaining member 6121. Preferably, the catching seat 632 is disposed outside the positioning boss 631. In other embodiments, the retaining seat 632 may be integrated with the positioning boss 631, that is, the retaining hole 6321 is disposed on the positioning boss 631. Through the clamping fit, the protective cover 61 can be easily installed on the base 63, and the protective cover 61 can be conveniently taken down from the base 63.

At least two elastic clamping pieces 6121 are uniformly distributed, and the clamping seats 632 are arranged corresponding to the elastic clamping pieces 6121 one by one. Preferably, there are two elastic catches 6121. When the elastic retaining member 6121 needs to be disassembled, the protective cover 61 can be easily removed by pressing the elastic retaining member 6121 inward with a hand or other tool.

The side wall 612 is located outside the positioning boss 631, and the inner surface of the side wall 612 is in clearance fit with the outer surface of the positioning boss 631. By the clearance fit, air in the housing space 7 can be discharged from the clearance. The notch 6123 is offset from the groove 6312, which increases the difficulty of water entering the inner space of the protective cover 61.

When water is present in the interior of the protective cover 61, i.e., in the space on the upper surface of the waterproof breathable film 62, the mounting surface 633 is located on a surface inclined from the horizontal plane, so that the water flows into the gap between the inner surface of the side wall 612 and the outer surface of the positioning boss 631 through the groove under the action of gravity, and then the water in the gap flows out from the notch 6123. Meanwhile, when water rushes to the electronic control unit 100, since the notches 6123 and the grooves 6312 are staggered, the difficulty of who water enters the protective cover 61 can be increased.

In the present embodiment, the electronic control unit 100 is used for a nitrogen oxygen sensor. Those skilled in the art will appreciate that the electronic control unit 100 may also be used in other scenarios, such as a control unit for an engine, a control unit for a transmission, etc.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (10)

1. An electronic control unit comprises a first shell (3), a second shell (1), a circuit board (2) and a waterproof and breathable mechanism (6), wherein an accommodating space (7) for accommodating the circuit board (2) is arranged between the first shell (3) and the second shell (1), the waterproof and breathable mechanism (6) is connected with the accommodating space (7), the electronic control unit is characterized in that the waterproof and breathable mechanism (6) comprises a base (63), a waterproof and breathable film (62) and a protective cover (61), the base (63) is provided with a through hole (633) connected with the accommodating space (7) and a positioning boss (631) surrounding the through hole (633), the protective cover (61) comprises an end part (611) and a side wall (612) extending out from the end part (611) to the base (63), the waterproof and breathable film (62) covers the through hole (633), and the side wall (612) is matched with the positioning boss (631), the protective cover (61) and the base (63) are fixed together in an assembling mode.

2. Electronic control unit according to claim 1, characterized in that the positioning boss (631) is provided with at least one groove (6312), which groove (6312) is open on three sides.

3. The electronic control unit of claim 2, characterized in that the side wall (612) is located outside the positioning boss (631), the inner surface of the side wall (612) being in clearance fit with the outer surface of the positioning boss (631).

4. The electronic control unit of claim 2, wherein the recess (6312) is provided with a bottom surface (63121), the base (63) is provided with a mounting surface (6331) for mounting the waterproof breathable membrane (62), and the bottom surface (63121) and the mounting surface (6331) are in the same plane.

5. An electronic control unit according to claim 4, characterized in that, in use, the mounting surface (6331) is located on a vertical plane.

6. The electronic control unit according to claim 2, wherein the side wall (612) is provided with a notch (6123) and an elastic retaining member (6121) located in the notch (6123), and the base (63) is provided with a retaining seat (632) having a retaining hole (6321) for cooperating with the elastic retaining member (6121).

7. The electronic control unit of claim 6, wherein the elastic retaining members (6121) are at least two and evenly distributed, and the retaining seats (632) are arranged in one-to-one correspondence with the elastic retaining members (6121).

8. The electronic control unit of claim 6, characterized in that the retaining seat (632) is located outside the positioning boss (631), the side wall (612) and the positioning boss (631) being cylindrical.

9. Electronic control unit according to claim 6, characterized in that the notch (6123) is arranged offset from the groove (6312).

10. The electronic control unit according to claim 1, further comprising a first connector (4) fixed to the first housing (3), the first connector (4) being provided with a connection space (41) communicating with the receiving space (7), the base (63) being provided on the first connector (4), the through hole (633) being connected with the connection space (41).