JP2000306636A - Mounting structure of electronic unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve stability of a mounting state and reliability of connection with a simple structure. SOLUTION: An electronic unit 1 provided with a print board 2 having an electronic part 3 and a connector 4 to be connected with the electric part 3 is mounted on an electric connection box having a mating connector 13 to be electrically connected with the connector 4. At that time, the electronic part 3 of the electronic unit 1 is arranged in a region for arranging an electronic part in a center part of the board and each of the connectors 4 having a connecting terminal 5 are arranged on both sides sandwiching the region for arranging an electronic part. The connector 4 on one side of the electronic unit 1 is linked with the mating connector 13 having equal number of connecting terminals arranged on a side of the electric connection box in a position corresponding to a position of the connector.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the mounting of an electronic unit for electrically connecting an electronic unit having electronic components mounted on a printed circuit board or the like to a case such as an electric junction box used in a vehicle. Regarding the structure.

[0002]

2. Description of the Related Art As shown in FIG. 5, various electronic components 102 and various electronic components 102 are provided on a printed circuit board 101 having a printed wiring (not shown) formed on the surface thereof. And a connector 103 that is electrically connected to the connector 103. The connector 103 is
In this configuration, a plurality of connection terminals 104 are arranged in two rows.

The electronic unit 100 is attached,
Electrical junction boxes used for wiring connections in vehicles, etc.
For example, it is configured as shown in FIG. The electric connection box 110 of the illustrated example includes an electric connection box main body 111 and a lid 112 attached to the opening 111a. Inside the electric connection box main body 111, a bus bar (not shown) and an insulating layer (not shown) alternate. A disposed circuit board is provided, and the circuit board is provided with a connector 113 and the like.

The connector 113 is a connector
As in the case of No. 3, a plurality of connection terminals 114 are arranged in two rows, and are arranged at positions that can be seen through the opening 111a.
The electronic unit 100 is attached to the lid 112, and the lid 112 in this state is connected to the electric connection box main body 1.
11 is attached to the opening 111a of the electronic unit 100 via the connectors 113 and 103.
And the circuit board are electrically connected.

[0005] A process of attaching the electronic unit to the electric junction box will be described with reference to FIG. First, as shown in FIG. 7A, the opening 111a of the electric connection box main body 111 is
The lid 112 to which the electronic unit 100 is attached is disposed to face the electronic unit 100. Subsequently, as shown in FIG.
13 and the connector 103, and the lid 1
The lid 112 is inserted into the opening 111a with the posture adjusted so that the connector 12 does not fit obliquely into the opening 111a. Finally, as shown in FIG. 103 is fitted and electrically connected, and the lid 112 is fitted and connected to the opening 111a.

[0006]

By the way, the conventional electronic unit has a structure in which a single connector 103 is arranged on one side of the printed circuit board 101 in order to minimize connection points and improve connection reliability. ing.

However, in the case of this structure, FIG.
As shown in (c), when the lid 112 is fitted into the opening 111a, the cantilevered structure in which the printed circuit board 101 is supported by a connecting portion between the connector 103 provided on one side and the connector 113 on the other side. Therefore, when the printed circuit board 101 shakes greatly due to the vibration of the vehicle, and in some cases, accompanied by abnormal natural vibration, the contact between the two connectors 103 and 113 is easily deteriorated. On the contrary, there is a possibility that the connection reliability is reduced.

Therefore, a locking means is provided on the side of the electric junction box main body 111 and the lid 112 opposite to the connector 103 of the electronic unit 100. As the lock means, in the example shown in FIG.
, And an engagement hole 114 provided in the lid 112, and the lid 112 is locked to the electric connection box main body 111 when the engagement projection 113 enters the engagement hole 114. . The concave portion 1 provided in a portion adjacent to the engagement hole 114
15 is an electric connection box main body 11 having an engagement projection 113 formed thereon.
1 functions as a guiding means guided by the side wall 116.

However, even if the locking means is provided, the engagement holes 114 and the engagement projections 113 constituting the locking means are provided with manufacturing tolerances. FIG.
The printed circuit board 1 moves in the direction of the arrow shown in FIG.
Although the swing of 01 itself is small, there is still a risk that the contacts of both connectors may deteriorate. In addition, there is a problem that the structure of the case becomes complicated by providing the locking means.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems of the prior art, and provides a mounting structure of an electronic unit capable of improving connection reliability and mounting state stability with a simple structure. The purpose is to:

[0011]

According to the present invention, there is provided a mounting structure for an electronic unit, comprising: an electronic unit including a board provided with an electronic component and a connector connected to the electronic component; An attachment structure of an electronic unit to be attached to a case having a connector, wherein two or more connectors are dispersedly arranged on the board, and the mating connector is arranged on the case side at a position corresponding to the connector arrangement of the connector. Configuration.

In this configuration, since the connectors are dispersed on the board, the board is supported by the double-sided structure, and the vibration (including the natural vibration) of the board can be prevented. Can be suppressed. Further, since the substrate can be supported by the two-sided structure, it is not necessary to provide a conventional locking means in the case, and the structure of the case is simplified.

In the mounting structure of the electronic unit according to the present invention, the electronic component may be connected to each of the connectors.

[0014] In this configuration, it is possible to electrically connect the electronic component to the closer connector, thereby suppressing the wiring from wrapping around, so that the wiring pattern can be simplified and Wiring design is facilitated.

The arrangement of the plurality of connectors in the mounting structure of the electronic unit according to the present invention is such that the plurality of connectors provided in the electronic unit are provided around the electronic component disposition area on the substrate. Configuration can be adopted. Further, the plurality of connectors may be provided so as to sandwich the electronic component disposition area.

In the configuration of the fourth aspect, the separation distance between the connectors on the electronic unit side can be increased without increasing the size of the board, and as a result, the support state of the board becomes stable and the board vibration is suppressed. . However, if the size of the board is increased to increase the separation distance between the connectors, the board may resonate and the connection reliability may be degraded, and the cost of the board itself increases, so that the area for disposing the electronic components is increased. It is preferable that the connector be provided with the electronic component disposition area sandwiched between the connector and the electronic component disposition area while minimizing the size of the connector. In this case, the size of the substrate can be reduced.

In the electronic unit mounting structure according to the present invention, the connector may have a configuration in which the connector has two or more connection terminals, and the connection terminals are arranged in a line along the electronic component disposition area. .

In this configuration, since there is no overlapping portion between the connection terminals adjacent to each other when viewed from the electronic component disposition area, it is possible to suppress the detour of the wiring provided between the electronic component and the connection terminal.
Wiring patterns can be simplified more effectively. Also,
It is not necessary to adjust the tab arrangement between each row as compared with the case where the connection terminals are arranged in two or three or more rows, so that the tab arrangement can be designed easily.

In the mounting structure of the electronic unit according to the present invention, the case is a case of an electric connection box containing a circuit board constituting an electric circuit together with the electronic unit in a vehicle. The circuit board may be connected to the electronic unit via the side connector.

[0020]

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

FIG. 1 is an external perspective view showing an electronic unit used for an electronic unit mounting structure according to an embodiment of the present invention. FIG. 2 is an electric connection box used for the electronic unit mounting structure according to the embodiment of the present invention. FIG.

As shown in FIG. 1, the electronic unit 1 has various electronic components 3 and connectors 4 connected thereto on a strip-shaped printed circuit board 2 on which printed wiring (not shown) is formed. Have been. The electronic components 3 are arranged in a concentrated manner in an electronic component disposition area A, which is a central portion in the longitudinal direction of the printed circuit board 2, and two connectors 4 are disposed on both ends of the substrate with the electronic component disposition area A interposed therebetween. Have been. Both connectors 4 have a configuration in which four female-side connection terminals 5 are arranged in a line along the periphery of the electronic component disposition area A. Each electronic component 3 is electrically connected to the connector 4 on the near side via a printed wiring. The shape of the printed circuit board 2 can be appropriately determined according to the specification, and is not limited to a strip shape.

On the other hand, an electric connection box to which the electronic unit 1 is attached and which is used for wiring connection in a vehicle or the like is configured as shown in FIG. 2, for example. The electric connection box 10 in the illustrated example includes an electric connection box main body 11 and a lid 12 attached to an opening 11a of the electric connection box main body 11. Inside the electric connection box main body 11, a bus bar and an insulating layer are laminated. A circuit board is built in. The circuit board is provided with a connector 13 and the like.

The connectors 13 are located at two positions corresponding to the connectors 4 at positions that can be seen through the opening 11a. Each connector 13 has four male connection terminals 14 like the connector 4. It is arranged in a line.
The electronic unit 1 is attached to the lid 12 with the connector 4 facing outward (downward in FIG. 2), and the lid 12 in this state is attached to the opening 11a of the electric connection box main body 11. Thereby, the electronic unit 1 and the circuit board are electrically connected via the connectors 13 and 4.

The process of attaching the electronic unit to the electric junction box will be described with reference to FIG. First, as shown in FIG. 3A, a lid 12 to which the electronic unit 1 is attached is disposed to face the opening 11 a of the electric connection box main body 11. Subsequently, as shown in FIG. 3B, the lid 12 is inserted into the opening 11a in a state where the connector 13 and the connector 4 are aligned, and finally, as shown in FIG. 3C. Thus, the connectors 13 and 4 are fitted and electrically connected, and the lid 12 is fitted and connected to the opening 11a.

Therefore, the following effects can be obtained in the electronic unit mounting structure of the present embodiment.

Since the connectors 4, 4 are present on both sides of the electronic component disposition area A of the printed circuit board 2, the printed circuit board 2 is supported by a double-supported structure, and vibrations (including natural vibrations) of the printed circuit board 2 are suppressed. Connector 4
13 can be prevented from deteriorating.

Also, the connector 4 is provided at a distance,
Since the printed circuit board 2 can be supported by the two-sided structure, it is not necessary to provide a conventional locking means in the electric connection box, the structure of the electric connection box can be simplified, and defective products due to deviation from the component tolerance standard of the locking means can be eliminated. Generation can be suppressed.

Further, since there are a plurality of fitting positions of the connectors 4 and 13, in this example, at two positions, it is possible to prevent the printed circuit board 2 from being attached obliquely to the electric connection box. More specifically, when the same number of connectors 4 are placed on the plurality of connectors 13 and then the lids are inserted into the openings and the connectors 4 and 13 are fitted, a fixed fit between the two connectors is obtained. Based on the fitting depth, the lid is mounted in a predetermined posture without being obliquely fitted to the electric connection box main body.

Further, since the electronic components 3 located in the vicinity of each connector 4 are distributed and electrically connected to each connector 4, it is possible to suppress wiring wraparound, thereby simplifying the wiring pattern. In addition to this, it becomes easy to perform wiring design. Accordingly, the degree of freedom in designing a printed circuit board is improved, and the number of design steps can be reduced. In addition, since the printed wiring for electrically connecting the electronic component 3 and the connector 4 can be dispersed,
The width of the printed wiring can be increased. For this reason, it is possible to cope with an increase in the current value due to an increase in the number of electronic devices connected to the electric junction box in recent years, for example, a car navigation, a TV, a car audio, and the like.

The connector 4 has four connection terminals 5
Are arranged in a line along the electronic component disposition area A, so that there is no overlapping portion between the adjacent connection terminals 5, so that the bypass of the printed wiring provided between the electronic components 3 can be suppressed. Wiring patterns can be simplified more effectively. As a result, the density of the printed wiring is reduced, so that the electronic components can be disposed closer to each other. Since the connector is provided with the small electronic component mounting area A interposed therebetween, the outer dimensions of the printed circuit board are reduced. Can be reduced in size. In addition, by arranging the connection terminals in one row, it is easy to design the tab arrangement of the circuit board built in the electric connection box, and it is possible to reduce the use of U-turn wiring and jumper wires.

In the above embodiment, an opening is provided in a part of the electric connection box, and an electronic unit is provided in a lid for closing the opening. However, the present invention is not limited to this. For example, the present invention can be similarly applied to a configuration in which an electronic unit is incorporated in a two-part electrical junction box.

FIG. 4 is an exploded perspective view showing an electronic unit mounting structure according to the application. In this example, there is provided an electric connection box in which a circuit board 22 formed by laminating a bus bar and an insulating layer is provided inside a lower case 20 and an upper case 21, and the electric connection box shown in FIG. An electronic unit 1 similar to that described above is provided. The electronic unit 1 has connectors 4 at both ends of a strip-shaped printed circuit board 2.
Each connector 4 has a configuration in which a cylindrical connection terminal 5 is fitted into four terminal bases 5 a protruding from the printed circuit board 2. The structure of the connector 4 is the same in the above embodiment.

The two connectors 4 of the electronic unit 1
Are located at two positions corresponding to the connectors 4.
2, the connectors 4 and 23 are electrically connected to each other. Each of the two connectors 23 has a configuration in which four connection terminals 24 are arranged in one line.

In this configuration, the above-mentioned effects (1) to (3) can be obtained as in the embodiment shown in FIGS.

In the above embodiment, the connectors on the electronic unit side are provided on both sides of the electronic component disposition area A, but the present invention is not limited to this. For example, a plurality of connectors on the electronic unit side may be provided apart from each other, and electronic components may be provided near the periphery of each connector. Even in this case, the structure for supporting the printed circuit board can be ensured, and the object of the present invention can be achieved.

Further, it is possible to adopt a configuration in which a plurality of connectors on the electronic unit side are provided on one half around the electronic component disposition area A (however, the electronic component disposition area A is not sandwiched). In the case of this configuration, it is preferable to provide the connectors more apart from each other without increasing the board size in terms of suppressing board vibration. For this reason, in the above embodiment,
A connector is provided with the electronic component disposition area A interposed therebetween to suppress vibration of the substrate.

Further, for example, connectors may be provided not only on both sides of the board but also in other parts around the board. In this case, the vibration of the substrate can be further prevented, and the deterioration of the contact of the connector can be more effectively suppressed. In addition, the distribution of wiring can be further improved.

Although not explicitly stated in the above embodiment, the configuration in which the connector 4 on the side of the electronic unit 1 is brought closer to the electronic component disposition area A, and the connector 4 is brought closer to the electronic component disposition area A, It is preferable that the electronic component disposition area A is configured to be small. By doing so, the size of the board can be reduced, and the interval between the connectors 4 provided with the electronic component disposition area A therebetween can be shortened.
Further, substrate vibration can be prevented, and deterioration of the contacts of the connector can be more effectively suppressed. Also, the electronic component disposition area A
It is preferable that the electronic components are arranged symmetrically, especially when the connectors are arranged on both sides of the board. In this case, the weight balance of the printed circuit board is stabilized, and the stability against vibration is improved. This can be applied even when the connector is arranged symmetrically with respect to the board,
In this case, it is preferable to arrange the electronic components connected to the opposed connectors symmetrically with respect to the center.

In the above embodiment, the structure for mounting the printed circuit board on the electric connection box has been described. However, the present invention is not limited to this, and the printed circuit board may be mounted on a case other than the electric connection box, or may be mounted on the printed circuit board. Alternatively, the present invention can be applied to the mounting of a board in which a connector and an electronic component are electrically connected using wiring such as a wire.

[0041]

As described above in detail, in the case of the present invention, since the connectors are dispersed on the board, the board is supported by the double-sided structure, and vibration (including natural vibration) of the board is prevented. As a result, it is possible to suppress the deterioration of the contacts of the connector, and since the substrate can be supported by a double-supported structure,
There is no need to provide a conventional locking means in the case, and the structure of the case can be simplified.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a printed circuit board used for an electronic unit mounting structure according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an electric connection box used for the mounting structure of the electronic unit according to the embodiment of the present invention.

FIG. 3 is a front sectional view showing a mounting process of the electronic unit according to the embodiment of the present invention.

FIG. 4 is an exploded perspective view showing an electronic unit mounting structure according to another embodiment of the present invention.

FIG. 5 is an external perspective view showing a printed circuit board used for a conventional electronic unit mounting structure.

FIG. 6 is an exploded perspective view showing an electric junction box used for a conventional electronic unit mounting structure.

FIG. 7 is a front sectional view showing a mounting process of a conventional electronic unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic unit 2 Printed circuit board 3 Electronic component 4, 13, 23 Connector 5, 14 Connection terminal 10, Electric connection box 20 Lower case 21 Upper case

Continued on the front page (72) Inventor Miya ▲ saki ▼ Junnoyuki 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (Reference) 5E021 FA05 FA09 FB02 FB09 FB20 FC07 FC29 FC31 FC38 HC40 JA20 5G361 BA01 BB01 BC01 BC03

Claims (6)

[Claims] An electronic unit mounting structure for mounting an electronic unit including a substrate provided with an electronic component and a connector connected thereto to a case having a mating connector electrically connected to the connector. An electronic unit mounting structure, wherein two or more connectors are dispersedly arranged on the board, and the mating connector is arranged on a case side at a position corresponding to the connector arrangement of the connector. 2. The mounting structure for an electronic unit according to claim 1, wherein said electronic components are distributed and connected to respective connectors. 3. The electronic unit mounting structure according to claim 1, wherein the plurality of connectors provided on the electronic unit are provided around an electronic component disposition area on a substrate. . 4. The electronic device according to claim 3, wherein the plurality of connectors are provided so as to sandwich the electronic component disposition area.
The mounting structure of the electronic unit according to 1. 5. The connector according to claim 1, wherein the connector has two or more connection terminals, and the connection terminals are arranged in a line along an electronic component disposition area.
An electronic unit mounting structure according to any one of claims 1 to 4. 6. The case according to claim 1, wherein the case is a case of an electric connection box including a circuit board that forms an electric circuit together with an electronic unit in a vehicle, and the circuit board is connected to the electronic unit via the connector and the mating connector. The mounting structure of an electronic unit according to any one of claims 1 to 5, wherein: