JP3465451B2 - Electronic circuit device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic circuit device having connection leads connected to a circuit board.

[0002]

2. Description of the Related Art As a terminal lead-out structure for making an electrical connection between a thick film baked substrate and an external connection terminal, FIG.
As shown in FIG. 0, it is conceivable to connect the substrate 30 and the connection lead 33 by using the sandwiching portion 34 provided at one end of the connection lead 33. That is, the connection portion 31 is formed at the edge of the circuit board 30 on which the electronic circuit is formed. or,
The connector portion 32 arranged above the circuit board 30 has a connection lead 33, and the holding portion 3 is provided at one end of the connection lead 33.
4 are provided. Then, the edge portion of the substrate 30 is sandwiched from both sides by the sandwiching portion 34 of the connection lead 33, and in this state, the sandwiching portion 34 is soldered to the connection portion 31 of the substrate 30.

[0003]

However, by adopting this structure, the work of attaching the substrate 30 and the connection lead 33 can be easily carried out. However, at the time of attachment, as shown in FIG. The holding portion 34 of the lead 33a corresponding to one long side of the substrate 30 having a strip shape is formed on the substrate 30.
The lead 33 corresponding to the other long side after that.
The procedure of inserting the holding portion 34b of b into the board 30 so as to be wider than the width of the board 30 is performed. At this time, the leads 33b are formed on the plane formed by the substrate 30.
The pinching portion 34 at the tip of is moved in the circumferential direction about the rotation center point P1 in FIG. 11, and unnecessary stress acts on the substrate 30, possibly causing substrate cracking. There is also. That is, the plane direction L of the substrate 30 in FIG.
1, the clamping direction L2 of the clamping section 34 (U-shaped clamping section 3
Therefore, unnecessary stress is exerted on the substrate 30 because the center line 4 of FIG. In other words, if the fitting work is carefully performed to avoid such a problem, workability will be deteriorated.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic circuit device which can easily connect the lead to the substrate side without applying unnecessary stress to the substrate by the holding portion at the tip of the lead.

[0005]

According to a first aspect of the present invention, a connector lead supporting member for supporting a connection lead is separated into a first connector lead supporting member and a second connector lead supporting member. And embedding it in a direction orthogonal to the first side of the first connector lead support member .
Fitting convex portion provided and second connector lead supporting member
The fitting convex portion in the direction orthogonal to the second side in
It is characterized in that a case capable formed fitting recess. Therefore, at the time of assembly, the sandwiching portion of the first connecting lead of the first connector lead supporting member is provided from both sides with respect to the first connecting portion on the first side of the square plate circuit board. Sandwich it. In addition, the sandwiching portion of the second connecting lead in the second connector lead supporting member is formed on both sides of the second connecting portion on the second side of the square plate-shaped circuit board that faces the first side. Insert it from the inside. Furthermore, mating
The first connector lead supporting member and the second connector lead supporting member are fitted and integrated by the convex portion and the fitting concave portion .

As described above, in the state in which the first connector lead supporting member and the second connector lead supporting member are divided into two parts, the holding portions of the connecting leads are provided on each side.
The circuit board can be sandwiched from the direction in which the stress is least applied to the circuit board, the cracking of the circuit board can be avoided, and the workability is improved. As a result, it is possible to easily connect the lead to the substrate side without applying unnecessary stress to the substrate by the holding portion at the tip of the lead. Claim
According to the invention of Item 2, a protrusion for preventing slippage is provided on the fitting protrusion.
And the position that corresponds to the protrusion for
There is a notch formed on the mounting
It is characterized by being. Therefore, for the first connector
Of the lead support member and the second connector lead support member
Even if a force that vertically shifts is applied, it is difficult to shift.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is embodied in a vehicle-mounted engine control computer, and an exploded perspective view is shown in FIG. FIG. 2 shows a vertical sectional view of the engine control computer. FIG. 3 shows the connector portion 3 of FIG.
FIG. 5 is a vertical sectional view taken along line AA of FIG.

As shown in FIG. 1, the engine control computer comprises a base material 1, a circuit board 2, a connector portion 3 and a case material 4. That is, as a whole configuration, as shown in FIG. 2, the circuit board 2 is fixed on the base material 1, and the connector lead supporting member 5 is located above the circuit board 2 at predetermined positions by the connecting leads 6 and 7. And the case member 4 is arranged so as to cover the circuit board 2 and the connector lead supporting member 5. The connection leads 6 and 7 are strip-shaped and made of phosphor bronze (copper alloy).

The circuit board 2 is made of a quadrangular plate-shaped (more specifically, rectangular) thick-film ceramics board, and various electronic components 8 which are electronic circuit components are mounted on the circuit board 2. Here, in FIG. 1, as the electronic component 8, a capacitor 8a, an IC circuit 8b, and an oscillator 8c are shown. An electronic circuit is formed on the circuit board 2 using the electronic component 8. Further, in the rectangular circuit board 2, a large number of first electrode connecting portions (connection lands) 11 are arranged in parallel on the upper surface of the edge at one side (first side) 9 of the long sides 9, 10. Has been done. A large number of second electrode connecting portions (connection lands) 12 are arranged in parallel on the upper surface of the edge portion of the other side (second side) 10 of the long sides 9 and 10 of the circuit board 2. The electrode connecting portions 11 and 12 are electrically connected to an electronic circuit configured using the electronic component 8.

The circuit board 2 is fixed on the base material 1. The base material 1 is made of an aluminum plate (metal plate), and functions as a heat dissipation plate that dissipates heat generated by the electronic component 8. In the connector portion 3, the connector lead supporting member 5 is provided in
As shown in FIG. 1, it comprises a first connector lead supporting member (hereinafter, simply referred to as a first member) 13 and a second connector lead supporting member (hereinafter, simply referred to as a second member) 14. The first member 13 is a resin molded product, and has a structure in which a large number of connection leads 6 as first connection leads are integrally formed. More specifically, the main body portion 13a of the first member 13 has a rectangular plate shape extending in the horizontal direction,
As shown in FIG. 2, one end side (upper end side) of the connection lead 6 is supported in an upright state, and the other end side (lower end side) projects from the lower surface, extends in the horizontal direction, and further extends downward. . The connection leads 6 are juxtaposed in the long side of the rectangular main body 13a with a constant interval.

The second member 14 shown in FIG. 4 is a resin molded product, and has a structure in which a large number of connection leads 7 as second connection leads are integrally formed. More specifically, the second member 14 has a rectangular plate shape extending in the horizontal direction, and as shown in FIG. 2, one end side (upper end side) of the connection lead 7 is supported in an upright state and the other end. The side (lower end side) projects from the lower surface, extends in the horizontal direction, and further extends downward. The connection leads 7 are juxtaposed along the long side of the rectangular second member 14 with a constant spacing.

On the other hand, rod-shaped arm portions 15 extend horizontally and parallel to each other from both ends of the main body portion 13a of the first member 13 shown in FIG. As shown in FIG. 3, a fitting convex strip 16 as a fitting portion is formed on the facing surface of the rod-shaped arm portion 15. Further, as shown in FIG. 3, on the side surface of the second member 14, a fitting concave line 17 as a fitting portion corresponding to the fitting convex line 16 of the first member 13 is formed. The fitting protrusion 16 of the member 13 and the fitting recess 17 of the second member 14 are fitted together.

Further, as shown in FIG. 2, the first member 1
On the surface where the main body portion 13a of 3 and the second member 14 are in contact with each other, the first member 13 is provided with a fitting ridge 18 as a fitting portion. In addition, the second member 14 is formed with a fitting concave line 19 as a fitting portion corresponding to the fitting convex line 18 of the first member 13, and the fitting convex line 18 of the first member 13 is formed. Second
The fitting concave line 19 of the member 14 is fitted.

As described above, the fitting projection 1 of the first member 13
6 and the fitting groove 17 of the second member 14, and
By fitting the fitting protrusion 18 of the first member 13 and the fitting recess 19 of the second member 14, both members 13, 14 are fitted. Here, the fitting protrusion 16 and the fitting recess 17 can slide, and the fitting protrusion 18 and the fitting recess 19 can slide.

As shown in FIG. 5 (plan sectional views of the members 13 and 14) and FIG. 6 (enlarged view of portion C in FIG. 4), the tip of the fitting projection 16 in the first member 13 is A retaining projection 23 is provided, and a notch 24 corresponding to the protrusion 23 is formed at the tip of the fitting groove 17 of the second member 14. The second member 14 is prevented from falling off by fitting the projection 23 and the cutout portion 24.

A holding portion 20 for holding the circuit board 2 from both sides is formed at the lower end of each connection lead 6 in FIG. Further, a holding portion 21 for holding the circuit board 2 from both sides is formed at the lower end of each connection lead 7.

As shown in FIGS. 7 and 8, connection leads 6 and 7 are provided.
The sandwiching portions 20 and 21 are formed by bending the strip-shaped connecting leads 6 and 7 into a U-shape. Holding part 2
The sandwiching distance W of 0 and 21 is the same as the thickness of the circuit board 2 to be fitted. In addition, the design tolerance of the sandwiching distance W between the sandwiching portions 20 and 21 is a minus tolerance so that the circuit board 2 cannot be easily removed even if the circuit board 2 is sandwiched.

The sandwiching portion 20 of the sandwiching portions 20 and 21 sandwiches the circuit board 2 from both sides at the installation position of the first electrode connecting portion 11 on the circuit board 2, and the sandwiching portion 21.
At the installation position of the second electrode connecting portion 12
Is sandwiched from both sides. Further, the sandwiching portions 20 and 21 are soldered to the electrode connecting portions 11 and 12 of the circuit board 2, and are electrically connected to the electrode connecting portions 11 and 12 of the circuit board 2. In FIG. 7, the solder is indicated by reference numeral 22.

The phosphor bronze (copper alloy), which is the material of the connecting leads 6 and 7, has a strong spring property. In addition, in FIG. 2, the upper ends (input / output terminals) of the connection leads 6 and 7 are connected to a cable (vehicle-mounted wire) via a connector, and are connected to a battery and various actuators by the same cable.

Next, the procedure for assembling the vehicle-mounted engine control computer thus configured will be described. A circuit board 2 on which a conductive pattern including electrode connection portions (connection lands) 11 and 12 is formed is prepared, and solder printing is performed on the circuit board 2. Then, the electronic component 8 (electronic circuit component) is mounted on the circuit board 2, and the circuit board 2 and the electronic component 8 are heated at the same time for solder connection. After that, electronic parts 8 and conductive patterns (board patterns) that cannot be soldered
Connection with Al is performed by Al wire bonding or the like.

Subsequently, the first member 13 and the second member 14 constituting the connector lead supporting member 5 are divided into two parts, and the sandwiching portion 20 of the connecting lead 6 in the first member 13 is connected to the circuit board 2. It is sandwiched at the edge portion at the long side 9 in. That is, as shown in FIG. 7, the sandwiching portion 20 of the connection lead 6 is formed in the portion where the first electrode connecting portion 11 of the circuit board 2 is formed.
Sandwich.

Further, the tip end portion of the fitting concave line 17 of the second member 14 is fitted to the fitting convex line 16 of the first member 13, and in this state, as shown in FIG. Member 14 is moved in the horizontal direction to slide the fitting groove 17 on the fitting ridge 16 and the holding portion 21 of the connection lead 7 is formed on the long side 10 of the circuit board 2 (second electrode). It is inserted in the connection part 12). At this time, as shown in FIG.
The sandwiching portion 21 of the connecting lead 7 is moved in a direction (the B direction in FIG. 7) in which the sandwiching direction of the sandwiching portion 21 (the center line of the U-shaped sandwiching portion 21) with respect to 3 coincides. And the second member 1
The fitting concave line 19 of No. 4 and the fitting convex line 18 of the first member 13 are fitted with each other, and the retaining projection 23 and the notch 2
4 is fitted, and the fitting of the first member 13 and the second member 14 is completed and the two are integrated.

Thereafter, as shown in FIG. 7, a solder paste (a paste made by mixing a granular solder material, flux and a solvent) is supplied to a place where the connection leads 6 and 7 are arranged in parallel by a dispenser. To do. Further, the solder is melted by using a means capable of locally heating with a laser beam or the like, and the sandwiching portions 20 and 21 and the electrode connecting portions 11 and 12 are joined. In this way, the sandwiching portions 20 and 21 and the electrode connecting portions 11 and 12 are soldered, and the electrode connecting portion 1
1, 12 and the sandwiching parts 20, 21 are electrically and mechanically connected by soldering.

In this way, the circuit board 2 and the connector portion 3 are formed into an integral structure, and then the circuit board 2 is adhesively fixed onto the base material 1. Then, the case member 4 is put on the base member 1 from above and assembled. More specifically, a heat resistant adhesive is applied to one of the contact surfaces (contact portions) of the base material 1 and the case material 4 to bond them. As a result, it is completed as a product.

As described above, in the present embodiment, the connector lead supporting member 5 for supporting the connection leads 6 and 7 is provided with the first
And a fitting portion (16, 17, 18, 19) for fitting both members to the first member 13 and the second member 14 At the time of assembling, the sandwiching portion 20 of the first connecting lead 6 in the first member 13 is attached to the first connecting portion 11 on the long side 9 of the rectangular plate-shaped circuit board 2 from both sides. The sandwiching portion 21 of the second connecting lead 7 in the second member 14 is sandwiched from both sides with respect to the second connecting portion 12 in the long side 10 opposite to the long side 9 in the rectangular plate-shaped circuit board 2. ,further,
The first member 1 by the fitting portion (16, 17, 18, 19)
3 and the second member 14 are fitted and integrated. In this way, in the state where the first member 13 and the second member 14 are divided into two parts, the holding portions 20 and 21 of the connection lead are
The circuit board 2 can be sandwiched from the direction in which the stress is least applied to the circuit board 2, cracks in the circuit board 2 can be avoided, and workability is improved. As a result, it is possible to easily connect the leads to the substrate side without applying unnecessary stress to the substrate 2 by the sandwiching portions 20 and 21 at the tips of the leads. Therefore, the productivity can be increased and the cost of the product can be reduced.

Further, in the structure shown in FIG. 11, it was necessary to widen the width of the lead pinching portion 34 to be larger than the width of the substrate 30, but this construction does not require such work.
The work is facilitated, and the alignment with the connecting portion can be surely performed, so that the assembling accuracy can be improved.

After the assembly, in addition to the fitting between the fitting protrusions 16 of the first member 13 and the fitting recesses 17 of the second member 14, the main body portion 13a of the first member 13 and the first 2 member 14
On the surface where and come into contact with each other, the fitting concave line 1 of the second member 14
9 and the fitting ridge 18 of the first member 13 are fitted together,
Even if a vertical displacement force acts between the main body portion 13a of the first member 13 and the second member 14, the displacement is unlikely to occur.

Another aspect of the present invention will be described below. In the example described above, the fitting protrusion 16 of the first member 13 and the fitting recess 17 of the second member 14 are fitted together, and the first
The members 13 and 14 are fitted by fitting the fitting ridge 18 of the member 13 and the fitting recess 19 of the second member 14,
Both members 13 and 14 may be fitted only by fitting the fitting ridge 16 of the first member 13 and the fitting ridge 17 of the second member 14. In addition, the fitting ridge 1 of the first member 13
Both members 13 and 14 may be fitted only by fitting the fitting recessed portion 19 of the second member 14 to the fitting member 8. At this time, after the fitting convex strip 18 and the fitting concave strip 19 are fitted to each other, high-temperature heat treatment may be performed to increase the strength of the fitting between the members 13 and 14.

Further, the sandwiching portions 20 and 21 and the electrode connecting portions 11 and 12 of the circuit board 2 may be joined with a conductive adhesive instead of solder. Further, the material of the connecting leads 6 and 7 may be brass or the like.

Furthermore, a printed circuit board on which a conductive pattern is simply printed may be used as the circuit board. That is, you may use the circuit board which consists of L components.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an engine control computer.

FIG. 2 is a vertical sectional view of an engine control computer.

3 is a vertical cross-sectional view taken along the line AA of FIG.

FIG. 4 is an exploded perspective view of a connector lead support member.

FIG. 5 is a plan cross-sectional view showing a fitted state of a first member and a second member of a connector lead supporting member.

6 is an enlarged view of a C portion of FIG.

FIG. 7 is an enlarged view of a connecting portion between a lead and a substrate.

FIG. 8 is an enlarged view of a connecting portion between a lead and a substrate.

FIG. 9 is an exploded perspective view for explaining a conventional technique.

FIG. 10 is a vertical cross-sectional view for explaining a conventional technique.

FIG. 11 is a vertical sectional view for explaining a conventional technique.

[Explanation of symbols]

2 ... Circuit board, 6 ... Connection lead (first connection lead),
7 ... Connection lead (second connection lead), 9 ... Long side (first
Side), 10 ... long side (second side), 11 ... first electrode connecting portion, 12 ... second electrode connecting portion, 13 ... first member (first connector lead supporting member), Reference numeral 14 ... Second member (second connector lead support member), 16 ... Fitting convex strip as a fitting portion, 17 ... Fitting concave strip as a fitting portion, 18
... fitting ridges as a fitting portion, 19 ... fitting recesses as a fitting portion, 20 ... sandwiching portion, 21 ... sandwiching portion

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01R 9/09 H01R 23/68 302 H05K 1/18

Claims (2)

(57) [Claims] 1. A rectangular plate shape, a first connecting portion is formed on an edge portion of a first side, and a second connecting portion is formed on an edge portion of a second side opposite to the first side. A first connecting lead having a holding portion for holding the first connecting portion of the circuit board from both sides, and a second connecting board of the second connecting portion of the circuit board at one end thereof. A second connecting lead having a sandwiching portion for sandwiching the connecting portion from both sides; a first connector lead supporting member supporting the other end side of the first connecting lead above the circuit board; A second connector lead support member that supports the other end side of the second connection lead above the board; and the first connector lead support member in the first connector lead support member .
A fitting protrusion which is attached in a direction perpendicular to the sides, the second in the second connector lead supporting member
The fitting convex part can be fitted in the direction orthogonal to the side of
Electronic circuit device is characterized in that a fitting recessed portion which is formed. 2. A protrusion for preventing disengagement is provided on the fitting protrusion.
Corresponds to the protrusion for preventing the removal in the fitting recess
At the position where the
The portion according to claim 1, wherein the portion is formed.
Electronic circuit device.