JPH10247548A - Water-proof connector for electronic controlling unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-proof connector for an electronic controlling unit which has a sealing property without increasing number of screws even when a male connector is enlarged. SOLUTION: The water-proof connector connects an electronic controlling unit to a wire harness, and the electronic controlling unit has a box like case 12 with a fitting hole 12b. By attaching a seal ring 13 to an outer peripheral wall 11c at the back part of a male connector 11, and fitting the back part of the made connector 11 to the fitting hole 12b, the seal ring 13 is closely contacted with an inner peripheral wall 12b of the fitting hole 12b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic control unit most suitable for integrating with an ABS (Anti-Lock Brake System), an EFI (Electronic Fuel Injection) or the like mounted in an engine room of an automobile. Related to waterproof connectors.

[0002]

2. Description of the Related Art In recent years, the types of electronic control units in automobiles have been increasing along with their high performance, and it is desired to secure a wide space in the vehicle compartment in which these electronic control units are arranged. There is a request.

Conventionally, each electronic control unit in the vehicle compartment is connected to an ABS or the like in the engine room by a wire harness. However, the number of wires in the wire harness has been significantly increased, and wiring work has become difficult. ing.

In view of the above-mentioned circumstances, each electronic control unit is arranged not in the vehicle compartment but in an ABS or the like in an engine room so as to secure a large space in the vehicle compartment and at the same time to carry out wiring harness work. Has been proposed (see Japanese Patent Application Laid-Open No. 6-239217).

When the electronic control unit is arranged in an engine room, measures such as waterproofness, heat resistance and vibration resistance are more important than when the electronic control unit is arranged in a vehicle interior.

As one of the countermeasures against water resistance, as shown in FIG. 5, a box-shaped case 2 having a fitting hole 2a for fitting the male connector 1 is provided, and the male connector 1 is provided. The seal ring 3 of the concave groove 1b formed on the upper surface of the outward flange 1a at the rear of the male connector 1 is fitted into the fitting hole 2a of the case 2 from the inside.
Abutting against the lower surface of the inward flange portion 2 b of the case 2, and a plurality of screws 4
Then, the male connector 1 may be fixed to the case 2 by screwing the flange portion 1a of the male connector 1 with a screw.

[0007]

However, in the above prior art, the seal ring 3 of the flange portion 1a of the male connector 1 is brought into close contact with the lower surface of the flange portion 2b of the fitting hole 2a of the case 2 by abutting. Therefore, when the size of the male connector 1 is increased, the number of screws 4 is increased (six in the prior art) in order to ensure the sealing performance of the seal ring 3, and the outer shape of the male connector 1 is accordingly changed. There is a problem that it becomes larger.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a waterproof connector for an electronic control unit which can ensure a sealing property without increasing the number of screws even when the size of the male connector is increased. Is the subject.

[0009]

According to the present invention, there is provided a waterproof connector for connecting an electronic control unit and a wire harness, wherein the electronic control unit has a box shape having a fitting hole. A seal ring is attached to the outer peripheral wall of the rear part of the male connector, and the seal ring is brought into close contact with the inner peripheral wall of the fitting hole while fitting the rear part of the male connector into the fitting hole. And a waterproof connector for the electronic control unit.

According to the present invention, since the seal structure is such that the seal ring of the outer peripheral wall at the rear portion of the male connector is in close contact with the inner peripheral wall of the case, it is not necessary to ensure the sealing performance with the number of screws, and the male connector is large. In this case, the number of screws does not need to be increased, so that the external shape of the male connector does not become large.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 to 3, the electronic control unit has an opening 12a on a lower surface and a male connector 1 on a side surface.
1 is provided with a box-shaped case 12 formed with a fitting hole 12b for fitting from the inside.

The opening 12a is closed by a cover 17 via a seal ring (not specifically shown), and the cover 17 has four screws 2 inserted through screw holes 17a.
0 is fixed to the case 12.

A printed wiring is adhered to the inner surface of the cover 17, and a flexible extended printed wiring extended from the printed wiring is insert-molded into the male connector 11 and two screws 2 are attached to the rear end face of the male connector 11.
Male terminal 1 protruding from auxiliary plate 22 fixed at 1, 21
5 is connected to the rear end 15a by soldering.

The auxiliary plate 22 is connected to two screws 21 and 21.
In the case where the auxiliary plate 22 is fixed by a slight offset in the vertical direction with respect to the center line a instead of the center line a in the width direction as shown in FIG. Cracks are less likely to occur in the soldered portion of the rear end 15a of the male terminal 15.

At the rear of the male connector 11, an outward flange 11a is provided.
In the fitting hole 12b, the flange portion 11 of the male connector 11 is provided.
An inward flange portion 12c is provided to stop the a from the fitting direction.

The inner surface of the seal ring 13 is fitted and attached to the outer peripheral wall 11c of the flange portion 11a of the male connector 11, and the outer surface of the seal ring 13 is fitted to the inner peripheral wall 12d of the fitting hole 12b of the case 12. Be adhered.
As shown in detail in FIG. 4, the seal ring 13 is preferably of a sliding type having wavy irregularities formed in the length direction.

A screw 1 for screwing the flange 11a of the male connector 11 from the flange 12c of the case 12
4 is reduced from four in the prior art of FIG. 5 to four.

In the waterproof connector constructed as described above, the male connector 11 is fitted into the fitting hole 12b from the opening 12a of the case 12 from the distal end side with the seal ring 13 attached to the flange portion 11a of the male connector 11. Then, when the flange portion 11a is fitted into the fitting hole 12b, the seal ring 13 of the flange portion 11a is fitted to the inner peripheral wall 12 of the fitting hole 12b.
It comes into close contact while sliding on c.

Thereafter, the case 12 is inserted through a seal ring.
Of the male connector 11 is screwed from the flange portion 12a of the case 12 with four screws 14 and the male connector 11 is fixed to the case 12. Fix it.

In the above waterproof connector, the seal ring 13 of the flange portion 11a of the male connector 11 is
Since it is in close contact with the inner peripheral wall 12c of the second fitting hole 12b, it is not necessary to secure the sealing performance with the number of screws 14 as in the prior art, and the number of screws 14 required for fixing the male connector 11 to the case 12 (4 in this example). The number of screws does not need to be increased even when the size of the male connector is increased, so that the outer shape of the male connector does not become large.

[0022]

As is clear from the above description, the waterproof connector of the present invention has a seal structure in which the seal ring of the outer peripheral wall at the rear of the male connector is in close contact with the inner peripheral wall of the case. It is not necessary to ensure the sealing property, and even when the male connector is enlarged, the number of screws does not need to be increased, so that the outer shape of the male connector does not become large.

[Brief description of the drawings]

FIG. 1 is a waterproof connector of the present invention, wherein (A) is a front view, (B) is a cross-sectional view taken along line AA of (A), and (C) is (A).
FIG. 7 is a sectional view taken along line BB of FIG.

FIG. 2 is an exploded perspective view of the waterproof connector.

FIG. 3 is a perspective view of a waterproof connector.

FIG. 4 is an enlarged sectional view of a seal ring.

5 (A) is a front view, FIG. 5 (B) is a sectional view taken along line AA of FIG. 5 (A), and FIG. 5 (C) is a sectional view taken along line BB of FIG. .

[Explanation of symbols]

 Reference Signs List 11 male connector 11a flange portion 11c outer peripheral wall 12 case 12a opening 12b fitting hole 12c flange portion 12d inner peripheral wall 13 seal ring 14 screw

Claims (1)

[Claims] 1. A waterproof connector for connecting an electronic control unit and a wire harness, wherein the electronic control unit includes a box-shaped case having a fitting hole, and a seal ring on a rear outer peripheral wall of a male connector. The waterproof connector of the electronic control unit, wherein the seal ring is attached to the inner peripheral wall of the fitting hole while the rear part of the male connector is fitted in the fitting hole.