JP2003079026A - Connector mounting structure for electronic control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector mounting structure for an electronic control unit capable of preventing the positional deviation of a connector without impeding an effective use of the plate surface of a printed board. SOLUTION: The structure is configured such that a tab terminal, which connects the printed board 2 of the electronic control unit and a busbar of a junction block, penetrates a slit 6 formed at the printed board 2 and is inserted to the connector 7 extending over the slit 6 on the printed board 2, and conductivity is thereby generated between the electronic control unit and the junction block. A wide-width rib 8 wider than the slit 6 of the printed board 2 is formed on the bottom surface 71 of the connector 7, and a part of the slit 6 of the printed board 2 is notched so as to engage with the rib 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector mounting structure of an electronic control unit used in, for example, a vehicle.

[0002]

2. Description of the Related Art Electronic control units of the type that can be attached to a junction block (electrical junction box) in recent years are
It is often installed inside the junction block.

To connect the junction block and the electronic control unit, as shown in FIG. 1, a so-called junction direct connection type connector (hereinafter referred to as a connector) 7 into which the bus bar 4 of the junction block 3 is directly inserted is used. Then, the connector 7 is assembled to the electronic control unit 1 to electrically connect the junction block 3 and the electronic control unit 1.

The bus bars 4 from the junction block 3 shown in FIG. 1 are arranged in a line so that the tab terminals 41 formed at the tip end of the bus bar 4 are gathered in a certain range. On the other hand, as shown in FIG. 7, the printed circuit board 2 of the electronic control unit 1 is provided with slits 6 which are long penetrating portions for penetrating all of the tab terminals 41 arranged as described above. The slit 6 and the connector 7 are set to be parallel to each other so as not to obstruct the penetration of each tab terminal 41.

A screw hole 7 is formed in front of and behind the connector 7.
a and 7b are provided, and the printed circuit board 2 is provided with screw holes 2a and 2b correspondingly, so that the connector 7 is mounted on the printer substrate 2 by overlapping and screwing both screw holes. It is designed to be worn.

[0006]

However, when the connector 7 is mounted on the printed circuit board 2, the screw hole 7 of the connector 7
a and 7b positions and hole diameters, screw holes 2a of the printed circuit board 2,
Positional deviations between the connector 7 and the slit 6 may occur due to the overlapping tolerances of the position and hole diameter of 2b and the screw diameter of the screw itself (not shown).

That is, not only when the initial setting of the connector 7 and the slit 6 is bad, but even when the initial setting is good and the parallelism of the connector 7 and the slit 6 is maintained, the rotational torque acting at the time of screwing causes The connector 7 may move relative to the slit 6 by an amount corresponding to the overlap of the above-mentioned tolerances, resulting in the positional deviation.

When the positional deviation becomes so large that the parallelism between the connector 7 and the slit 6 cannot be maintained as shown by the broken line in FIG. 1, it is difficult to insert each tab terminal 41 into the connector 7. Therefore, there is a problem that the electronic control block 1 cannot be assembled to the junction block 3.

Until the connector 7 is screwed,
Since the connector 7 is only placed on the printed circuit board 2, there is also a problem that the connector 7 may be detached from the printed circuit board 2 when the printed circuit board 2 is tilted laterally or is not handled properly.

Therefore, a method for preventing the positional deviation between the connector and the slit has been devised. Here, as shown in FIG. 8, pins 7c and 7d are provided outside the connector 7,
The printed circuit board 2 is provided with pin holes 2c and 2d corresponding to the pins 7c and 7d.
The connector 7 and the slit 6 are prevented from being displaced by being inserted into the c and 2d.

However, in this case, the pin holes 2c and 2d are
There is a restriction on the wiring such that the back surface or the front surface of the printed circuit board 2 of the electronic control unit 1 does not have a conductive pattern (not shown), so that the board surface of the printed circuit board 2 cannot be effectively used. There was a new problem.

The present invention has been made to solve the problems of the prior art, and it is possible to prevent the positional deviation between the connector and the slit without hindering the effective use of the plate surface of the printed circuit board. An object is to provide a connector mounting structure for an electronic control unit.

[0013]

The invention according to claim 1 is
With the electronic control unit mounted on the junction block, multiple terminals arranged in a row on the junction block penetrate through the long through-holes formed on the printed circuit board of the electronic control unit and penetrate through the printed circuit board. In the connector mounting structure of the electronic control unit, which is configured to establish electrical continuity between the junction block and the electronic control unit by being inserted into the connector arranged in parallel with the connector, a terminal in the bottom surface of the connector A protruding portion wider than the penetrating portion of the printed board is provided between the insertion portions, and a part of the penetrating portion of the printed board is cut out so that the protruding portion can be fitted. Is.

According to the above structure, a protrusion having a width wider than that of the penetrating portion of the printed circuit board is provided between the terminal inserting portions in the bottom surface of the connector, and a part of the penetrating portion of the printed circuit board is formed.
Since the protruding portion is cut out so that it can be fitted, when the connector is mounted on the printed circuit board, the protruding portion of the connector and the cutout portion of the through portion are fitted together, and by this fitting, the printed circuit board of the connector is fitted. The positioning to the top is facilitated, and the parallelism between the connector and the penetrating portion at the time of initial setting can be obtained with sufficient accuracy.

Also, once the parallelism between the connector and the penetrating portion is provided by this fitting, when the connector is subsequently screwed and fixed to the printed circuit board, a rotational torque acts between them. Even if you do so, the connector and the through-hole will not move relative to each other due to the restriction of this fitting part.Therefore, the screw hole position and hole diameter of the connector, the screw hole position and hole diameter of the printed circuit board, and the screw diameter of the screw itself. Regardless of the tolerances set for each of
The parallelism between the connector and the penetration is kept below its tolerance. In this way, not only at the time of initial setting, but also after that, the positional deviation between the connector and the penetrating portion can be suppressed to the allowable value or less, so that the insertion of each terminal into the connector is not hindered and the electronic control block Assembly to the junction block is facilitated.

Further, since this fitting is performed within the bottom surface of the connector, it is not possible to affect the conduction pattern of the electronic control unit, and therefore, there is no restriction in the wiring, so that the printed circuit board is not restricted. The board surface can be effectively used.

Further, since the connector is temporarily fixed on the printed circuit board by this fitting, the connector can be detached from the printed circuit board by itself even if the handling is a little bad such as tilting the printed circuit board to the side. Disappears.

According to the second aspect of the present invention, if two pairs of the protruding portion of the connector and the cutout portion of the through portion are provided at least in the longitudinal direction of the through portion, Since the connector is supported at at least two points on the printed circuit board, its positioning becomes easier and more stable support after positioning is obtained.

According to the third aspect of the present invention, if the protruding portion of the connector is formed with a bulging portion for preventing the connector from coming off from the penetrating portion of the printed circuit board, the connector is more reliably temporarily fixed. Will be done.

[0020]

1 is an exploded perspective view showing a general structure in which an electronic control unit is mounted on a junction block, and FIG. 2 is an exploded view showing a connector mounting structure of an electronic control unit according to an embodiment of the present invention. Perspective view, FIG. 3 and FIG.
Is a partially enlarged view of FIG.

As shown in FIGS. 1 and 2, the connector mounting structure of the electronic control unit according to this embodiment is for connecting the printed circuit board 2 of the electronic control unit 1 and the laminated bus bar 4 of the junction block 3 to each other. The tab terminal (terminal) 41 penetrates the slit 6 as a long penetrating portion formed on the printed circuit board 2 of the electronic control unit 1,
The electronic control unit 1 and the junction block 3 are electrically connected by being inserted into a connector 7 arranged in parallel with the slit 6 on the printed circuit board 2.

The junction block 3 has a case 31.
The wiring member such as the bus bar 4 is housed between the partition plate 32 and the partition plate 32. A printed circuit board 2 of an electronic control unit 1 having a plurality of electronic components and the like is mounted thereon, and a lid 10 is mounted on the printed circuit board 2.

In the laminated bus bar 4, a plurality of bus bars are provided with an insulating layer interposed therebetween, and the tab terminals 41 are arranged in a line in a standing state on a predetermined bus bar.
The height of the tab terminal 41 is set so as to stay within the connector 7.

In this embodiment, two connectors 7 having the same structure having a long shape are mounted on both left and right ends of the printed circuit board 2 in FIG. Then, the bottom surface 7 of the connector 7
A rib (projection) 8 wider than the slit 6 of the printed board 2 is provided in the space between the insertion portions 9 of the tab terminal 41, and a part of the slit 6 of the printed board 2 is provided in
The rib 8 is cut out so that it can be fitted. Rib 8
The amount of protrusion is slightly larger than the thickness of the printed circuit board 2. As a result, a sufficient fitting state between the rib 8 and the slit 6 can be obtained. Also, the rib 8
Two notch portions 61 of the slit 6 and the notch portion 61 of the slit 6 are provided in front of and behind the slit 6 in the longitudinal direction. As a result, the connector 7 is supported at two positions on the printed circuit board 2, so that its positioning is very simple and stable support after positioning can be obtained.

2 to 4, the rib 8 is eccentrically arranged on either the left or right side within the bottom surface 71 of the connector 7, but it may be arranged eccentrically in the opposite direction. Also,
The bottom surface 71 of the connector 7 does not necessarily have to be eccentric.
If it is inside, it may be arranged over the entire width of the connector 7 or may be arranged only in a part of the width direction of the connector 7. In that case, the notch portion 61 of the slit 6 has a shape corresponding to the rib 8.

The rib 8 may have a straight shape as shown in FIG. 2, but the tip (the portion exceeding the thickness of the printed circuit board 2) is bulged to temporarily cut out the notched portion 61 of the slit 6 of the printed circuit board 2. Appropriate preventive measures may be taken to prevent the ribs 8 inserted into the ribs from falling off. As a countermeasure against this, the shape of the bulging portion 81 of the rib 8 is changed to, for example, as shown in FIG.
In addition to the bag shape as shown in FIG. 4, a semicircular shape as shown in FIG. 4 may be used. In any case, the connector 7 can be reliably temporarily fixed to the printed circuit board 2 simply by fitting the rib 8 of the connector 7 into the slit 6 of the printed circuit board 2.

These bulging portions 81 are formed on the printed circuit board 2
Since the slit 6 is wider than the notched portion 61 of the slit 6, when the rib 8 is inserted into the slit 6, the notched portion 61 of the slit 6 is further widened, which may increase the resistance. In that case, an appropriate cut portion may be provided inside the bulging portion 81 of the rib 8 so that the resistance does not become excessive.

FIG. 5 is an exploded perspective view showing the detailed structure of the connector, and FIG. 6 is a sectional view showing its assembled state. Hereinafter, a method of mounting the connector according to the present embodiment on the printed board will be described. It should be noted that in FIGS. 1 to 4 above, the connector shape is shown in a simplified form for the sake of convenience of explanation, so that the external shape is slightly different, but in reality it is shown in FIGS. 5 and 6. It has the same shape as the one.

The connector 7 is, as shown in FIGS. 5 and 6,
A female metal fitting 713 is housed at a predetermined position between the base member 711 and the cover member 712, and the cover member 712 is attached to the protrusion 714 formed at the predetermined position of the base member 711.
By engaging the claws 715 and the like formed at the corresponding positions, these elements are integrated and fixed on the printed circuit board 2.

The female fitting 713 is a cover member 71.
2 through holes 716, through holes 717 and 718 formed in the base member 711 (shown collectively as the insertion portion 9 of the tab terminal 41 in FIGS. 2 to 4), and the printed board 2. The tab terminals 41 and the like can be inserted through the slits 6.

Flange portions 731 having bolt holes 730 for fixing are projected at both front and rear ends of the cover member 712, and the rib 8 is projected downward on the back surface (bottom surface) 71 of the base member 711. . The rib 8 is provided avoiding the through holes 717 and 718 so as not to interfere with the tab terminal 41 at the time of assembly to be described later.

Then, the cover member 712 and the base member 711 are set so as to straddle the slit 6 of the printed circuit board 2 in a state where the cover member 712 and the base member 711 are integrated, and the rib 8 is fitted to the notch portion 61 of the slit 6. On the flange part 731
Bolt holes 730 and the bolt holes 2a, 2 of the printed circuit board 2
A bolt (not shown) is inserted into b and fixed.

In this way, the tab terminal 41 from the junction block 3 of FIG. 1 is inserted into the connector 7 mounted on the printed board 2.

The connector 7 is attached to the upper surface side which is the surface of the printed circuit board 2, and here the female metal fitting 7 is attached.
13 is formed by bending a thin plate of conductive metal into a rectangular tube shape.
1 is formed. A connection piece 722 is extended on the outer side of the female fitting 713 and on the side opposite to the spring tongue piece 721.
The connection piece 722 is soldered to a printed wiring (not shown) formed on the printed board 2 (reference numeral 723).

When the printed circuit board 2 on which the connector 7 is mounted is further mounted on the junction block 3, the tab terminal 41 penetrates the printed circuit board 2 and is inserted into the connector 7. Since the spring tongue piece 721 makes contact, the laminated bus bar 4 is electrically connected to the printed wiring of the printed circuit board 2 via the tab terminal 41, the spring tongue piece 721 of the female metal fitting 713, and the connection piece 722. The assembled state is as shown in FIG.

As described above, according to this embodiment, when the connector 7 is mounted on the printed circuit board 2, the rib 8 of the connector 7 and the cutout portion 61 of the slit 6 are fitted to each other, so that the printed circuit board 2 of the connector 7 is fitted. The positioning to the upper side becomes easy, and the parallelism between the connector 7 and the slit 6 at the time of initial setting can be obtained with sufficient accuracy.

Further, if the parallelism between the connector 7 and the slit 6 is once provided by this fitting, then when the connector 7 is screwed and fixed to the printed circuit board 2, the connector 7 and the slit 6 are rotated between them. Even if torque is applied, the connector 7 and the slit 6 are prevented from moving relative to each other by being regulated by this fitting portion. Therefore, the screw holes 7a, 7 of the connector 7 are formed.
between the connector 7 and the slit 6 regardless of the tolerances of the position and hole diameter of b, the positions and hole diameters of the screw holes 2a and 2b of the printed circuit board 2, and the screw diameter of the screw itself (not shown). Parallelism can be kept below its tolerance. As described above, in the present embodiment, the positional deviation between the connector 7 and the slit 6 can be suppressed to the allowable value or less not only at the time of initial setting but also after that. Is not obstructed, the assembly of the electronic control unit 1 into the junction block 2 is facilitated, and the working efficiency thereof can be improved.

Further, this fitting is performed by the bottom surface 71 of the connector 7.
Since it is carried out inside the electronic control unit 1, the conductive pattern formed on the printed circuit board 2 of the electronic control unit 1 cannot be affected. Therefore, there is no restriction on the wiring, and the board surface of the printed circuit board 2 can be effectively used. It will be available.

Further, by this fitting, the connector 7 is temporarily fixed on the printed circuit board 2, so that the printed circuit board 2
The connector 7 will not be detached from the printed circuit board 2 by itself even if the connector 7 is slightly mishandled such as being tilted to the side.

In the above embodiment, two pairs of the rib 8 of the connector 7 and the cutout portion 61 of the slit 6 of the printed circuit board 2 are provided before and after in the longitudinal direction of the slit 6, but one pair or three or more pairs may be provided. May be However, in order to prevent the connector 7 from being displaced due to a moment when the screw is tightened and to ensure the fitting accuracy of the rib 8 with respect to the slit 6, the structure of the connector 7 in the longitudinal direction is not complicated. It is desirable to provide at least two pairs in front and back.

In the above embodiment, the connector 7 is described as a junction direct connection type connector.
For example, another type of connector such as an intermediate member provided between the tab terminal 41 and the tab terminal 41 may be used.

In the above embodiment, the case where the present invention is applied to the mounting structure of the electronic control unit used in the vehicle has been described, but the present invention is applied to other fields, for example, the mounting of the electronic control unit of home electric appliances. It may be applied to the structure.

[0043]

According to the first aspect of the present invention, when the connector is mounted on the printed circuit board, the connector can be easily positioned on the printed circuit board by fitting the protruding portion of the connector and the cutout portion of the through portion. And with sufficient accuracy,
The parallelism between the connector and the through portion at the time of initial setting can be obtained.

Further, once the parallelism between the connector and the penetrating portion is provided by this fitting, when the connector is screwed and fixed to the printed circuit board thereafter, a rotational torque acts between them. Even if you do so, the connector and the through-hole will not move relative to each other due to the restriction of this fitting part.Therefore, the screw hole position and hole diameter of the connector, the screw hole position and hole diameter of the printed circuit board, and the screw diameter of the screw itself. Regardless of the tolerances set for each of
The parallelism between the connector and the penetration can be kept below its tolerance. In this way, the positional deviation between the connector and the penetrating portion can be suppressed below the permissible value not only at the time of initial setting but also after that, so that the insertion of each terminal into the connector is not hindered and the electronic It is possible to facilitate the assembly of the control block to the junction block and improve the work efficiency.

Further, since this fitting is carried out within the bottom surface of the connector, it is not possible to affect the conduction pattern of the electronic control unit, and therefore, there is no restriction on the wiring, so that the printed circuit board is not restricted. The board surface can be effectively used.

Further, since the connector is temporarily fixed on the printed circuit board by this fitting, the connector may be detached from the printed circuit board by itself even if the handling is a little bad such as tilting the printed circuit board to the side. Disappears.

According to the second aspect of the invention, since the connector can be supported at at least two positions on the printed circuit board, the positioning thereof becomes simpler and more stable support after positioning can be obtained. .

According to the third aspect of the invention, the connector can be more reliably temporarily fixed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a general configuration in which an electronic control unit is mounted on a junction block.

FIG. 2 is an exploded perspective view showing a connector mounting structure of the electronic control unit according to the embodiment of the present invention.

FIG. 3 is a partially enlarged view of FIG.

4 is a partially enlarged view of FIG.

FIG. 5 is an exploded perspective view showing details of the connector.

FIG. 6 is a cross-sectional view showing an assembled state of the connector.

FIG. 7 is an exploded perspective view showing an example of a connector mounting structure of a conventional electronic control unit.

FIG. 8 is an exploded perspective view showing another example of a conventional connector mounting structure of an electronic control unit.

[Explanation of symbols]

1 Electronic control unit 2 printed circuit boards 3 junction blocks 31 cases 32 partition boards 4 laminated busbars 41 Tab terminal (terminal) 6 slits (penetration part) 61 Notch 7 connector 71 Bottom 8 ribs (protrusion) 81 bulge 9 (717, 718) Tab terminal insertion part

Claims (3)

[Claims] 1. An electronic control unit mounted on a junction block, wherein a plurality of terminals arranged in a row on the junction block penetrate through a long penetrating portion formed on a printed circuit board of the electronic control unit, In a connector mounting structure of an electronic control unit, which is configured to establish electrical continuity between the junction block and the electronic control unit by being inserted into a connector arranged in parallel with the through portion on the printed circuit board, A protrusion that is wider than the through portion of the printed circuit board is provided between the terminal insertion portions in the bottom surface of the base plate, and a part of the through portion of the printed circuit board is cut out so that the protrusion can be fitted. The connector mounting structure of the electronic control unit. 2. The electronic control unit according to claim 1, wherein two pairs of a projecting portion of the connector and a cutout portion of a penetrating portion of the printed circuit board are provided at least before and after in the longitudinal direction of the penetrating portion. Connector mounting structure. 3. The connector mounting structure for an electronic control unit according to claim 1, wherein a bulging portion for preventing the connector from coming off from the penetrating portion of the printed circuit board is formed at the tip of the protruding portion of the connector.