JP2001128339A - Connector structure of electrical junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of soldering processes, using flow soldering and the number of components, and further, faciltate a work for inserting terminals into through-holes. SOLUTION: Inner ends 19b of connector terminals 19 and one end 22b of a bonding terminals 22 are inserted into through-holes 21a and 21b from one surface side of a wiring board 21. With this constitution, the terminals 19 and 22 can be soldered simultaneously by flow soldering, on the other surface side of the wiring board 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector structure most suitable for an electric junction box mounted in, for example, an engine room of an automobile.

[0002]

2. Description of the Related Art Conventionally, as an electric connection box mounted in an engine room of an automobile, as shown in FIGS.
Shield case 3 interposed between upper case (upper cover) 1 and lower case (lower case cover) 2
A ceramic substrate 5 on which electronic components 4 are mounted is accommodated in the inside, and at least one of the cases 1 and 2, in this example, the upper case 1, has a connector housing 1a facing the outside.
The inner end 7a of the connector terminal 7 mounted in the connector housing 1a is soldered to a circuit 8a on the lower surface side of a wiring member 8 such as a flexible printed circuit or a printed circuit board. One end 9a of the bonding terminal 9 is soldered b to the circuit 8b on the upper surface side of the wiring member 8, and the other end 9 of the bonding terminal 9 is soldered.
b and a pad 4a of a circuit of the electronic component 4 of the ceramic substrate 5 are bonded by a wire 10. The electronic parts 4 are used for electronic fuel injection control and anti-lock brake control. The upper case 1 is made of a heat-resistant synthetic resin.
And the shield case 3 are made of an aluminum alloy. Further, a circuit portion of the electronic component 4 or the like 4 of the ceramic substrate 5 is filled with a silicone gel (not specifically shown).

[0003] As shown in FIGS. 8 and 9, the bonding terminal 9 is provided with a screw 11 on the back surface of the upper case 1.
Is inserted into the bonding housing 12 fixed by the step (a), and through the slit 3a from the upper surface side of the shield case 3 together with the bonding housing 12, the other end 9b of the bonding terminal 9 is connected to the lower surface side of the shield case 3. Comes closer to the pad 4a of the circuit of the electronic component 4 etc. of the ceramic substrate 5 arranged on the substrate.

[0004]

In the above-mentioned conventional electric connection box, the inner end 7a of the connector terminal 7 is connected to the wiring member 8a.
Is soldered to the circuit 8a on the lower surface side of the wiring member 8 and one end 9a of the bonding terminal 9 is soldered to the circuit 8b on the upper surface side of the wiring member 8, so that it is soldered by flow soldering. When attaching, for example, first
One end 9a of the bonding terminal 9 is soldered to the circuit 8b on the upper surface side of the wiring member 8, and then the inner end 7a of the connector terminal 7 is soldered to the circuit 8a on the lower surface side of the wiring member 8. In this case, the flow soldering is divided into two steps, which increases the number of soldering steps.

Further, since the bonding housing 12 is fixed to the upper case 1 with the screws 11, there is a problem that the number of parts increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and reduces the number of components and the number of parts required for soldering by flow soldering, and enables an electric junction box to be easily inserted into a through hole. The purpose of the present invention is to provide a new connector structure.

[0007]

In order to solve the above-mentioned problems, the present invention is directed to an upper case and a lower case in which a substrate on which electronic components and the like are mounted is housed, and at least one of the cases has a connector facing the outside. A housing is provided, and a circuit of a wiring material such as a flexible printed circuit or a printed circuit board is soldered to an inner end of the connector terminal mounted in the connector housing,
In a connector structure of an electric connection box, one end of a bonding terminal is soldered to a circuit of the wiring material, and the other end of the bonding terminal and a pad of a circuit such as an electronic component on the substrate are wire-bonded. The inner end of the connector terminal and the one end of the bonding terminal are inserted into the through hole from one side of the wiring material, and are simultaneously soldered by flow soldering on the other side. An object of the present invention is to provide a connector structure of an electric junction box.

According to the present invention, the inner end of the connector terminal and the one end of the bonding terminal can be inserted into the through hole from one side of the wiring member, so that both terminals can be connected to the other end of the wiring member. Flow soldering on the surface side allows simultaneous soldering.

It is preferable that a bonding housing for holding the bonding terminal is provided, and the bonding housing is formed integrally with the upper case.

[0010] According to a third aspect of the present invention, the wiring member may be divided into a suitable number of poles.

[0011]

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

FIGS. 1 to 5 show an electric junction box mounted in an engine room of an automobile and containing electronic parts for electronic fuel injection control and antilock brake control.

The electric connection box has an upper surface 15a and a peripheral surface 15a.
b, a square box-shaped shield case 16 connected to the lower opening of the upper case 15, and a lower cover (lower case) 17 for closing the lower opening of the shield case 16. By inserting bolts (not shown) that pass through the bolt holes 15c at the four corners of the lower case 15 through the bolt holes 16a at the four corners of the shield case 16, and screwing into the bolt holes 17a at the four corners of the lower cover 17, With the shield case 16 interposed between the case 15 and the lower cover 17, the members 15, 16, 17 are fixed in a watertight manner via packing or the like.

The upper case 15 is made of a heat-resistant synthetic resin, and the shield case 16 and the lower cover 17 are made of an aluminum alloy. The lower cover 17 may be a rectangular box-shaped lower case.

At the center of the upper surface 15a of the upper case 15, four connector housings 18 are integrally formed. Each connector housing 18 has a rectangular cylindrical hood portion 18a projecting upward and a hood portion 18a. And a terminal holding portion 18b on the bottom surface of the terminal holding portion 18b.
Has a terminal insertion hole 18c for fixing the connector terminal 19 therein.
Are formed.

A total of 120 connector terminals 19 are inserted and held in each of the connector housings 18 in a total of 30 rows in four rows, and the outer end 19a of each connector terminal 19 faces the hood 18a. , The inner end 19 b faces the inside of the upper case 15.

A wiring member 21 such as a rectangular flexible printed circuit or a printed circuit board housed in the upper case 15 is provided. At the center of the wiring member 21, one of the connector terminals 19 is provided. End 19b
Through holes 21a are formed from the upper surface side, and bonding terminals 2 to be described later are formed at both side positions.
2 is formed with a through-hole 21b through which the inwardly downward upper end portion 22a is inserted from the upper surface side.
Inner end portion 19b and upper end portion 2 of bonding terminal 22
2a is to be soldered to the circuit 21c on the lower surface side of the wiring member 21.

At both sides inside the upper case 15, rectangular bonding housings 23 protruding downward are integrally formed, and the bonding terminals 23 are provided on the lower surface of the bonding housings 23, respectively.
Press-fit groove 23a is formed. Note that the bonding terminals 22 may be fixed by bonding, instead of press-fitting, or may be fixed by insert molding.

The bonding terminal 22 is connected to the upper end 2
2a is bent in an inverted U-shape inward and downward, and a lower end 22b is bent in an inverted L-shape outward. The upper ends 22a are arranged in two rows or more so as to be staggered inward and outward alternately, and the lower ends 22b are
They are arranged in one horizontal row.

The bonding terminals 22 on both sides
Before the assembly, the carriers are preferably connected in series by a carrier (not shown), and it is preferable that the carrier is cut after being press-fitted into the press-fit grooves 23a of the bonding housings 23.

As shown in FIG. 4, the upper ends 22a of the bonding terminals 22 and the connector terminals 19 are formed.
The inner end 19b of each of the through-holes 21a, 2a from the same direction from the upper surface side to the lower surface side of the wiring member 21 respectively.
1b will be inserted.

On both sides of the upper surface of the shield case 16, slits 16b are formed to allow the lower ends 22b of the bonding terminals 22 to penetrate into the shield case 16 together with the bonding housings 23 of the upper case 15. Have been.

A rectangular ceramic substrate 25 accommodated in the shield case 16 is provided. Electronic components 26 are mounted on the lower surface of the ceramic substrate 25, and the bonding terminals are provided on both sides. Pad 2 of the bonding circuit corresponding to the lower end 22b
7 are formed respectively, and the pads 27 of the respective bonding circuits and the lower end portions 22b of the respective bonding terminals 22 are formed.
Are bonded with the wires 28 respectively.

To assemble the electric junction box having the above structure,
The terminal 19 for the connector is inserted into the terminal insertion hole 18c of the terminal holding portion 18b of each connector housing 18 of the upper case 15.
And the housing 23 for bonding.
After fixing the bonding terminal 22 in the press-fit groove 23a, the inner end portion 19b of the connector terminal 19 and the bonding terminal 2 are inserted into the through holes 21a and 21b of the wiring member 21.
2 is inserted through the lower end 22b of the wiring member 21 from the upper surface side.

In this state, the upper case 15 is brought into the flow soldering step, and the inner end 19b of the connector terminal 19 and the lower end 22b of the bonding terminal 22 are formed by flow soldering from the lower surface side of the wiring member 21. Are soldered simultaneously (see FIG. 5).

Then, the upper case 1 is watertightly sealed via a packing or the like into an opening on the upper surface of the shield case 16 in which a ceramic substrate 25 on which electronic parts 26 are mounted is mounted.
5, the lower ends 22b of the bonding terminals 22 pass through the slits 16b of the shield case 16 together with the bonding housings 23 on both sides of the upper case 15 and face the pads 27 of the bonding circuit on both sides of the ceramic substrate 25. The pad 27 of each bonding circuit and each bonding terminal 22
Is bonded to the lower end 22b with a wire 28.

Thereafter, silicone gel is filled from the lower opening side of the shield case 16 at least to such an extent that the pads 27 of the bonding circuit of the ceramic substrate 25 are covered, and then the lower surface opening of the shield case 16 is filled with packing or the like. The upper case 15, the shield case 16 and the lower cover 17 are fixed by bolts (see FIG. 1).

In the above configuration, the inner end 19b of the connector terminal 19 and the lower end 22b of the bonding terminal 22
And through holes 21a, 21a from the upper surface side of wiring material 21.
1b so that both terminals 19,
Since the inner end portion 10b and the lower end portion 22b of the wiring 22 can be simultaneously soldered by the flow soldering on the lower surface side of the wiring member 21, the soldering process by the flow soldering is reduced from the conventional two processes to one. become able to.

Further, since the bonding housing 23 for holding the bonding terminal 22 is formed integrally with the upper case 15, the bonding housing 23 and the screws for fixing the bonding housing 23 to the upper case are not required, so that the number of parts can be reduced. become.

On the other hand, as shown in FIG.
To each connector terminal 1 of the four connector housings 18.
9, the bonding terminals 22 on both sides are also divided into two parts corresponding to the cut lines d and e.

The inner end 19 of the connector terminal 19
b and the lower end 22b of the bonding terminal 22 are divided and inserted into the through holes 21a and 21b of each circuit for each divided wiring member 21 (A to D), so that a large number of terminals 19 and 22 are formed. At the same time, through holes 21a and 21b
Work can be easily performed.

[0032]

As is apparent from the above description, the present invention enables the inner end of the connector terminal and one end of the bonding terminal to be inserted into the through hole from one surface side of the wiring member. As a result, both terminals can be soldered simultaneously by flow soldering on the other surface side of the wiring material.
The number of processes can be reduced.

Further, by integrally forming the bonding housing for holding the bonding terminals with the upper case (claim 2), the bonding housing and the screws for fixing the bonding housing to the upper case are not required, and the number of parts is reduced. become able to.

Further, by dividing the wiring member into a proper number of poles (claim 3), the inner end of the connector terminal and the one end of the bonding terminal can be separated for each divided wiring member. Since the circuit can be divided and inserted into the through hole of the circuit, the operation of inserting the circuit into the through hole can be easily performed.

[Brief description of the drawings]

FIG. 1 is an electric connection box according to the present invention, wherein (a) is a top perspective view and (b) is a bottom perspective view with a lower cover removed.

FIG. 2 is an exploded perspective view of the upper surface side of the electric junction box.

FIG. 3 is an exploded perspective view of the lower surface side of the electric connection box.

FIG. 4 is an exploded perspective view of a lower surface side of the electric connection box in which terminals are incorporated.

FIG. 5 is a longitudinal sectional view of a main part of the electric junction box.

FIG. 6 is a longitudinal sectional view of a main part of a conventional electric junction box.

FIG. 7 is a conventional electric connection box, in which (a) is a top perspective view and (b) is a bottom perspective view with a lower cover removed.

FIG. 8 is an exploded perspective view of a top side of a conventional electric junction box.

FIG. 9 is an exploded perspective view of the lower surface side of a conventional electric junction box.

[Explanation of symbols]

 Reference Signs List 15 upper case 16 shield case 17 lower cover 18 connector housing 19 connector terminal 19b inner end 21 wiring material 21a, 21b through hole 21c circuit 22 bonding terminal 22a upper end 22b lower end 23 bonding housing 25 ceramic substrate 26 electronic components, etc. 27 Bonding circuit pad 28 Bonding wire c Soldering

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Noriichi Okamura 1-7-10 Kikuzumi, Minami-ku, Nagoya, Aichi Prefecture Inside Harness Research Institute, Inc. (72) Inventor Hiroki Hirai 1 Kikuzumi, Minami-ku, Nagoya, Aichi Prefecture No. 7-10 F-term in Harness Research Institute, Inc. (Reference) 5E023 AA04 AA16 BB23 CC22 HH18 5E077 BB23 BB26 BB31 BB32 CC02 CC22 DD01 DD12 GG01 JJ05 JJ20 5G361 BA01 BA07 BB01 BB03 BC01 BC02

Claims (3)

[Claims] A substrate on which electronic components and the like are mounted is accommodated inside an upper case and a lower case, and at least one of the cases is provided with a connector housing facing the outside, and a connector terminal mounted in the connector housing. A circuit of wiring material such as a flexible printed circuit or a printed circuit board is soldered to the inner end of the
In a connector structure of an electric connection box, one end of a bonding terminal is soldered to a circuit of the wiring material, and the other end of the bonding terminal and a pad of a circuit such as an electronic component on the substrate are wire-bonded. The inner end of the connector terminal and the one end of the bonding terminal are inserted into the through hole from one side of the wiring member and are simultaneously soldered by flow soldering on the other side. Connector structure of electrical junction box. 2. The connector structure for an electric connection box according to claim 1, wherein a bonding housing for holding the bonding terminal is provided, and the bonding housing is formed integrally with the upper case. 3. The connector structure for an electric junction box according to claim 1, wherein the wiring member is divided for each appropriate number of poles.