JP4932287B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electric connection box such as an in-vehicle computer case or a fuse box case to which a sensor, an actuator, a main wire harness and the like are electrically connected.

Conventionally, the electrical connection box for connecting the connection terminals of the wiring substrate and the external electrical device such as a flexible printed circuit board and Riji' de printed circuit board that is housed inside the case is known. In such an electrical connection box, the wiring board is connected to a connection terminal of an external electric device through a board connector mounted on the wiring board such as a bus bar or by directly mounting a header pin on the wiring board. (Cited document 1).
JP-A-7-106014

  However, such an electrical junction box has a problem that the number of parts increases and the number of assembly steps increases due to interposition of a board connector and a header pin between the wiring board and the external electrical equipment. In addition, it is difficult to reduce the size as the number of parts increases.

  This invention is made | formed in view of such a point, and it aims at providing the electrical junction box which reduced the number of parts and the assembly man-hours, and implement | achieved size reduction.

The electrical junction box according to the present invention includes a flexible printed board having a card edge connector portion formed at an end thereof, a main body case for housing the flexible printed circuit board, and a card edge connector portion integrally formed on a surface of the main body case. A body-side connector for fixing the housing, and a housing and a metal terminal accommodated in the housing to which a plurality of electric wires are connected and to which the card edge connector portion is connected, and is detachably fitted to the body-side connector. And a mating connector for electrically connecting the flexible printed circuit board and the electric wire, and the main body side connector accommodates the end of the flexible printed circuit board so as to extend in the connector insertion / removal direction. And a guide for sandwiching the main body case side of the end of the flexible printed circuit board from both sides The card edge connector portion is fixed in a state where it is exposed from the tip of the guide in the connector insertion / removal direction, and the metal terminal is formed with a slit that sandwiches the card edge connector portion of the flexible printed circuit board from both sides at the tip. The card edge connector portion is sandwiched at both ends of the slit to be connected to the card edge connector portion, and the guide tip protrudes in the connector insertion / removal direction from the surface of the main body case. position near Rukoto and said.

  According to the electrical junction box according to the present invention, a card edge connector is formed at the end of the flexible printed circuit board, and a metal terminal connected thereto is provided with a contact electrically connected to the card edge connector. The board connectors and header pins that have been used can be reduced. Thereby, the number of parts and assembly man-hours can be reduced, and the electronic junction box can be downsized.

  FIG. 1 is an overall perspective view of the electrical junction box according to the first embodiment of the present invention.

  The in-vehicle computer case according to the present invention incorporates a flexible printed circuit board which is a flexible flat wiring board, and stores a main body case 4 having a main body side connector 2 on the upper surface thereof, and a plurality of electric wires 5 therein. A mating connector 6 that engages with the main body side connector 2 is provided. The main body side connector 2 and the mating side connector 6 are detachably engaged by a lock member 7 included in the main body side connector 2.

  FIG. 2 is a partial cross-sectional view along A-A ′ of FIG. 1.

The flexible printed circuit board 1 is accommodated in the main body case 4 configured by engaging the upper case 20 and the lower case 21. This flexible printed circuit board 1 is formed by forming a wiring pattern 9 made of copper foil on a base film 8 such as PET, and covering it with a cover lay film 10 made of resin. The terminal portion of the flexible printed circuit board 1 is formed with a card edge connector 18 in which a part of the terminal portion is not covered with the coverlay film 10 and the wiring pattern 9 is exposed. The body case 4 side of the terminal portion is held so as to be sandwiched between guides 12 rising upward from the upper case 20 inside the body-side connector 2. The main body side connector 2 opens upward, and accommodates and engages the mating connector 6 therein.

In the counterpart connector 6, the electric wire 5 is connected to the inside of the housing 13 via the metal terminal 14. The electric wire 5 is joined to the metal terminal 14 at the end where the covering material 15 is peeled off and the conductive material 16 is exposed. The metal terminal 14 is formed with a slit 17 at the tip thereof for sandwiching the terminal portion of the counterpart flexible printed circuit board 1. A contact 19 is formed at the tip of the slit 17 so as to sandwich the card edge connector 18 of the flexible printed circuit board 1 from both sides. The housing 13 is formed with an engagement member 24 that engages with the lock member 7 at a position facing the lock member 7. A lance 23 that engages with the metal terminal 14 is provided at a position facing the metal terminal 14.

Thus, the card edge connector 18 is formed at the terminal portion of the flexible printed circuit board 1 and the contact 19 is formed at the tip of the metal terminal 14 of the mating connector 6. It is possible to reduce the parts such as the bus bar and the header pin that are interposed. As a result, the number of assembling steps can be reduced, and downsizing of the in-vehicle computer case can be realized. Furthermore, since the flexible printed circuit board 1 can form a circuit with high accuracy by a technique such as etching, it is possible to create a circuit that easily adapts to the alignment such as the pitch and arrangement of the metal terminals 14 of the mating connector 6. it can.

  FIG. 3 is a perspective view showing the entire in-vehicle computer case according to the second embodiment of the present invention. FIG. 4 is a partial cross-sectional view taken along B-B ′ of FIG. 3.

In the first embodiment, one mating connector 6 is formed on the upper case 20, but in the second embodiment, two main body side connectors 2 are formed on the upper surface of the upper case 20A. The mating connector 6 is engaged. The flexible printed circuit board 1 is accommodated inside the main body case 4A, and card edge connectors 18 are formed at both ends. The card edge connector 18 is connected to a contact 19 formed on the mating connector 6.

  FIG. 5 is a partial cross-sectional view of an electrical junction box according to the third embodiment of the present invention.

In the first embodiment, the main body side connector 2 is formed only on the upper case 20, but in this embodiment, one main body side connector 2 is formed on each of the upper case 20 and the lower case 21B. This is the main body side connector 2, the mating connector 6 are respectively engaged. Further, the flexible printed circuit board 1 inside the main body case 4B is bent and arranged so as to engage with the main body side connector 2 on the front and back surfaces. Thus, by forming the main body side connector 2 on the front and back of the main body case 4B, the main body case 4B can be reduced in size, so that the in-vehicle computer case can be mounted even in a narrow place.

  FIG. 6 is a partial cross-sectional view of an electrical junction box according to the fourth embodiment of the present invention.

In the first embodiment, the electric wire 5 was connected to a single flexible printed circuit board 1 housed in the main body case, in the fourth embodiment, in the body casing 4C, the flexible printed circuit board or Riji' de PCB The main printed circuit board 1C is arranged, and a part of the flexible printed circuit board 1c is branched and connected to the main printed circuit board 1C. In the main body case 4C, the main printed circuit board 1C is disposed between the upper case 20 and the lower case 21, and the flexible printed circuit board 1c is disposed between the upper case 20C and the auxiliary case 22 provided on the upper surface of the upper case 20C. Has been. Some of the flexible printed circuit board 1c via a hole 25 provided in the upper case 20C, are connected to the main printed circuit board 1C. A card edge connector 18 is formed at both ends of the flexible printed circuit board 1 c and engages with the external electric wire 5 via the mating connector 6.

This fourth embodiment can be applied to, for example, a small current circuit incorporated in a main fuse box or a power distribution fuse box. In this way, by installing the flexible printed circuit board 1c which is a sub printed circuit board in addition to the main printed circuit board 1C, an additional function (main printed circuit board 1C) can be easily added to the circuit board (main printed circuit board 1C) built in the existing joint box or fuse box. A flexible printed circuit board 1c) can be added.

It is a perspective view showing the whole electric junction box concerning a 1st embodiment of the present invention. It is A-A 'sectional drawing of FIG. It is a perspective view showing the whole electric junction box concerning a 2nd embodiment of the present invention. FIG. 4 is a B-B ′ sectional view of FIG. 3. It is a partial cross section figure of the electrical junction box which concerns on the 3rd Embodiment of this invention. It is a partial cross section figure of the electrical-connection box concerning the 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Flexible printed circuit board, 2 ... Main body side connector, 4 ... Main body case, 5 ... Electric wire, 6 ... Opposite side connector, 7 ... Lock member, 12 ... Guide , 14 ... Metal terminal, 18 ... Card edge connector, 19 ... Contact , 20 ... upper case, 21 ... case, 100 ... electrical junction box.

Claims (4)

A flexible printed circuit board having a card edge connector formed at the end; and
A body case for storing the flexible printed circuit board;
A main body side connector integrally formed on the surface of the main body case and fixing the card edge connector portion;
The flexible printed circuit board includes a housing and a metal terminal which is accommodated in the housing and connected to the plurality of electric wires, and to which the card edge connector portion is connected, and is detachably fitted to the main body connector. A mating connector for electrically connecting the electric wire,
The main body-side connector includes a guide for accommodating an end portion of the flexible printed circuit board so as to extend in a connector insertion / removal direction, and sandwiching the main body case side of the end portion of the flexible printed circuit board from both sides, Fix the edge connector in a state where it is exposed from the tip of the guide in the connector insertion / removal direction,
The metal terminal is formed with a slit that sandwiches the card edge connector portion of the flexible printed circuit board from both ends at the tip thereof, and is connected to the card edge connector portion by sandwiching the card edge connector portion from both sides at the tip of the slit. With contacts ,
Said guide tip, the electric connection box, wherein the Ru position near projecting to the connector insertion and removal direction from the surface of the body case.   The electrical connection box according to claim 1, wherein the flexible printed circuit board has card edge connector portions formed at both ends. At least one main body side connector is formed on each of the upper surface and the bottom surface of the main body case,
The electrical connection box according to claim 2, wherein the flexible printed circuit board is bent and arranged in the main body case so as to be connected to the main body side connector formed on an upper surface and a bottom surface.   4. A small current circuit board or an electric circuit board is further provided in the main body case, and the flexible printed circuit board is connected to the small current circuit board or the electric circuit board. The electrical junction box according to claim 1.

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