JPH09172720A - Electric connection box with electronic circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manhour of assembling electronic components. SOLUTION: An insulating plate and a bus bar 13 are laminated and disposed in the lower case 11 and the upper case 12 of an electric connection box 10 for connecting a wire harness and at the same time an electronic circuit board 14 is received in the upper side of a part thereof, and the circuit part of the electronic circuit board 14 is electrically connected to a tab projected from the bus bar 13 through a connection terminal. Further, an electronic component for an essential function in a wire harness system of a diode 20, a noise filter 21 and the like and an electronic component for an additional function of a buzzer 22 for preventing foregetting to turn off a light and pull out a key and the like are mounted on the electronic circuit board 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box with an electronic circuit for connection with a wire harness for an automobile, and more particularly, to an electronic circuit board in which electronic parts which have been separately attached to a wire harness and an electric connection box are attached to an electronic circuit board. The number of assembling steps is reduced and the continuity inspection work is facilitated.

[0002]

2. Description of the Related Art Conventionally, as an electric connection box with an electronic circuit of this type, as shown in FIG. 3, a relay integration 4 containing an electronic circuit board 3 is mounted in a case 2 different from the electric connection box 1. Things are offered. In the electronic circuit board 3 housed in the relay integration 4,
An electronic component 5 for an additional function, such as a key removal forgetting alarm buzzer or a light erasing forgetting alarm buzzer, is connected to the circuit portion of the electronic circuit board 3 and attached.

The additional function electronic component 5 is not an essential component for the Waihearness system, and the Waihearness function is fulfilled even if it is not mounted. These additional function parts 5 are housed in the case 2 in a state of being attached to the electronic circuit board 3 as shown in the figure, and are prepared as a separate relay integration 4 and provided on the upper case 6 of the electric connection box. It is attached to the relay integration accommodating portion 6a.

On the other hand, as shown in FIG. 3, electronic parts for essential functions such as a diode and a noise filter, which are indispensable for establishing the WaiHearness system and need to be connected to the WaiHearness, are shown in FIG. The receiving portion 6b provided in each of the
Noise filters 7A and 7B are separately attached to c and 6d, respectively. Or without attaching to the electrical junction box,
In some cases, an electric component such as a diode is directly connected and attached to a required electric wire of Wai Hearness, and the wire group is held by winding the tape on the Wai Hearness that is bundled.

[0005]

As described above, among the electronic components, the electronic components for essential functions are separately mounted in the electric junction box or the wiring area, so that the number of mounting steps is increased. Moreover, there is a problem that the case structure of the electric junction box becomes complicated and the size of the case becomes large. Further, when the electronic components are directly attached to the Wi-Hayness, it is necessary to conduct a continuity test for each of them, which is a troublesome task.

In addition, since the electronic component for additional functions requires the case 2 for accommodating the electronic circuit board 3 separately from the electric junction box 1, the cost is increased and the relay integration accommodated in the case is connected to the electric junction box. Since it is attached to the electric connection box, there is a problem that the electric junction box becomes larger.

The present invention has been made in order to solve the above-mentioned problems, and the electronic components for the essential function, which are conventionally attached separately, are attached together with the electronic components for the additional function on the electronic circuit board, and the number of attachment steps is reduced. An object of the present invention is to reduce the size of the electric connection box by reducing the number of cases and eliminating the case for accommodating the electronic circuit board, and accommodating the electronic circuit board inside an electric connection box that serves as a lower case and an upper case.

[0008]

In order to solve the above-mentioned problems, according to claim 1 of the present invention, an insulating plate and a bus bar are laminated inside the lower case and the upper case of the electric junction box connected to the waiherness. Along with, a part of the electronic circuit board is accommodated, the circuit portion of the electronic circuit board and the tab protruding from the bus bar are electrically connected via a connection terminal, and to the electronic circuit board, An electrical connection box with an electronic circuit that is equipped with electronic components for essential functions such as diodes and noise filters in the Wi-Hearness system and electronic components for additional functions such as a buzzer for preventing forgetting to turn off the light and forgetting to remove the key Are offered.

As described above, electronic parts for essential functions such as diodes and noise filters are preliminarily attached together with electronic parts for additional functions such as an alarm buzzer on the electronic circuit board housed inside the electric connection box, and the connection terminals are used to connect the parts. If it is configured to connect to the bus bar housed in the electrical connection box, it is not necessary to separately install them on the wiring or the electrical connection box, reducing the number of installation steps and conducting a continuity test easily, and downsizing the electrical connection box. Be peeled off. Moreover,
Since the electronic circuit board is housed in the electronic circuit housing provided inside the case consisting of the lower case and the upper case, it is possible to eliminate the need for a dedicated case that was required in the past, reduce costs and reduce the size of the electrical junction box. Can be realized.

The connection terminal has an electric connection portion connected to the circuit portion and an electric connection portion connected to the tab protruding upward from the bus bar in a direction orthogonal to each other, and the connection terminals are provided in parallel. Housings for accommodating and holding the terminals are provided in the terminal accommodating chambers, and in a state where the connection terminals are accommodated in the housing, the housings are laterally fitted to the peripheral edge of the electronic circuit board to connect the connection terminals and the circuit section, The connection terminals housed in the housing together with the electronic circuit board are set from above, the connection terminals are fitted to the tabs of the bus bar, and the electronic circuit board is placed on the upper surface of the pedestal protruding from the lower case. The upper case is assembled to the lower case so as to cover the circuit board. (Claim 2)

In the above electric connection box, a bus bar having tabs protruding upward is set on the upper surface of the lower case of the electric connection box from above, and the connection terminal accommodated in the housing is connected to the circuit portion of the electronic circuit board. The electronic circuit side fitting portion is set by being fitted from the side, and while fitting the bus bar side fitting portion of the connection terminal housed in the housing together with the electronic circuit board from above into the tab of the bus bar, The circuit board is set on the upper surface of the pedestal provided on the upper surface of the lower case, the upper case is covered and locked by the lower case, and the electronic circuit board is pressed and assembled on the upper surface of the pedestal through the housing.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, the electrical junction box 10 includes a rectangular box-shaped lower case 11 and an upper case 12 made of synthetic resin.
When the upper case 12 is put on the upper case 12, the lock claws 11b on the outer surface 11a of the lower case 11 are engaged with the lock claws 12b on the outer surface 12a of the upper case 12, respectively, so that the upper case 12 is locked and fixed to the lower case 11. I have to. In the lower case 11, the bus bar 13 is provided at two corners on the right side in the length direction and at substantially the middle portion in the length direction.
4 pedestals 11c, ..., 1 protruding to a position above
1c is erected.

On the upper surface of the lower case 11, a bus bar 13 having a tab 13a protruding upward is set and positioned from above. The pedestal 11c, ..., 11c
Projects upward from the uppermost bus bar 13, and the electronic circuit board 14 is placed on the pedestal 11c by using these pedestals 11c as electronic circuit housing portions.

The electronic circuit board 14 set on the upper surface of the pedestal 11c is formed in a rectangular shape so that the four corners are exactly set on the upper surface of each pedestal 11c, and the left corner corresponding to the pillar portion 11e is formed. A notch (not specifically shown) for escaping the pillar portion 11e is provided.

A printed circuit portion (not shown) is provided on both upper and lower surfaces of the electronic circuit board 14, and the diode 20 and the noise filter (capacitor), which are electronic components for essential functions, are connected to the printed circuit portion. ) 21 is mounted, and electronic parts for additional functions such as an alarm buzzer 22 for preventing key forgetting and forgetting to turn off the light are also mounted. The electronic component for additional functions is the one conventionally housed in the relay integration. As shown in FIG. 2, the electronic circuit board 14 has a circuit portion 14a continuous with the printed circuit portion on the outer periphery of both sides of the upper surface thereof.
Is formed. The printed circuit portion may be provided on one of the upper and lower surfaces of the electronic circuit board 14 and may be electrically connected to the electronic components to be mounted.

As described above, the WaiHearness, which has conventionally been separately attached to the electric junction box or the WaiHearness,
The electronic parts for essential functions that are indispensable to the establishment of the system, together with the electronic parts for additional functions, are included in the lower case 11 of the electrical junction box.
It is attached in advance to the electronic circuit board 14 housed in the case consisting of the upper case 12 and the upper case 12.

An electronic circuit board 14 is provided on the upper surface of the pedestal 11c.
Guide ribs 11f, 11f for positioning housings 16, 16 (described later) attached to the outer periphery of both sides of the electronic circuit board 14 when the lower case 1 is set from above.
1 and the guide rib 19a is protruded from the insulating plate 19 laminated with the bus bar 13.

The housings 16 and 16 are made of synthetic resin having a substantially harmonica shape, and each of the housings 16 accommodates the connection terminals 17 in a large number of terminal accommodating chambers 16a. Each connection terminal 17 is connected to the circuit section 1 of the electronic circuit board 14.
An electrical connection portion 17a that is fitted to the side 4a to be electrically connected is provided in a direction orthogonal to an electrical connection portion 17b that is fitted to the tab 13a of the bus bar 13 of the lower case 11 from above. Each housing 16 is set in advance on the electronic circuit board 14 by fitting the electric connection portion 17a on the electronic circuit side of each accommodated connection terminal 17 into the circuit portion 14a of the electronic circuit board 14 from the side.

At the upper part of the inner surface of the upper case 12, a pressing shoulder portion (not shown) is formed which abuts the upper surface of each housing 16 when the upper case 12 is locked by covering the lower case 11. The pressing shoulders press the four corners of the electronic circuit board 14 onto the upper surfaces of the pedestals 11c of the lower case 11 via the housing 16.

As described above, the outer surface of the pedestal 11c of the lower case 11 is formed flush with the outer surface 11a of the lower case 11, and the outer periphery 14b of the electronic circuit board 14 is formed.
Is formed flush with the pedestal 11c and the outer surface 11a of the lower case 11, and when the lower case 11 is covered with the upper case 12 when the electronic circuit board 14 is displaced,
The lower part of the inner surface of the upper case 12 abuts on the upper surface of the electronic circuit board 14 protruding outward from the outer surface 11 a of the lower case 11 so that the upper case 12 is not covered.

When assembling the electronic circuit board 14 into the electric junction box 10, after the connection terminals 17 are accommodated in the terminal accommodating portions 16a of the respective housings 16, the respective circuit portions 14a on the outer periphery of both sides of the electronic circuit board 14 are An electronic circuit side electric connecting portion 17a of the connecting terminal 17 is set together with each housing 16 so as to be fitted from the side. As described above, the electronic circuit board 14 is preliminarily attached with the diodes of the essential function electronic parts, the noise filter, and the like, and with the buzzer of the additional function electronic parts.

Next, the electronic circuit board 14 is fitted with the bus bar side electrical connection portion 17b of the connection terminal 17 housed in each housing 16 together with the electronic circuit board 14 from above from the bus bar 13 set on the upper surface of the lower case 11.
Is set on the upper surface of each pedestal 11c of the lower case 11.

When the electronic circuit board 14 is set on the upper surface of the pedestal 11c, the housing 16 and the electronic circuit board 14 are positioned by the guide ribs 11f and 13b, so that the connection terminal 17 of each housing 16 is electrically connected to the bus bar side. The work of fitting the connecting portion 17b to the tab 13a of the bus bar 13 can be smoothly performed.

After the electronic circuit board 14 is set, the lower case 11 is covered with the upper case 12, and the electronic circuit board 14 is pressed against the pedestal 11c of the lower case 11 through the respective housings 16. It is fixed in the lower case 11 and the upper case 12.

When the electric connection box is assembled as described above,
The electronic circuit board 14 has one electronic component for essential functions which has conventionally been separately attached to the electric junction box or the Wi-hearness.
It can be installed inside the electrical junction box in a single assembly operation. And at the same time as assembling,
Through the connection terminal 17, the essential function parts are connected to the bus bar 13
Connected to

[0026]

As is apparent from the above description, in the electric connection box with an electronic circuit according to the present invention, the electric parts for essential functions which have been separately attached directly to the electric connection box or the Wi-hearness and the electronic circuit in the related art have been conventionally used. The electronic components for additional functions that were attached to the board and housed in a special case and the electronic component mounted on one electronic circuit board are housed in the case of the electrical junction box consisting of the lower case and the upper case. It can be assembled in the electrical junction box by a single assembly operation, and the number of assembly steps can be significantly reduced. Further, it becomes possible to easily conduct the continuity inspection of these electronic components.

Furthermore, the conventional case for accommodating the electronic circuit board can be eliminated, and the cost can be reduced.
The electric junction box can be downsized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an electric junction box of the present invention before being covered with an upper case.

FIG. 2 is an exploded perspective view of an electric junction box.

FIG. 3 is an exploded perspective view of a conventional electrical junction box with an electronic circuit.

[Explanation of symbols]

 10 Electrical Connection Box 11 Lower Case 11c Pedestal 11f Guide Rib 12 Upper Case 13 Busbar 14 Electronic Circuit Board 14a Circuit Part 16 Housing 17 Connection Terminal 20 Diode (Electronic Component for Essential Function) 21 Noise Filter (Electronic Component for Essential Function) 22 Alarm Buzzer (Electronic parts for additional functions)

Claims (2)

[Claims] 1. An insulating plate and a bus bar are stacked inside a lower case and an upper case of an electric connection box connected to a Wi-hearness, and an electronic circuit board is housed above a part of the insulating board and a circuit of the electronic circuit board. Section and the tab protruding from the bus bar are electrically connected via a connection terminal,
In addition, the electronic circuit board is equipped with electronic components for essential functions such as diodes and noise filters in the Wi-Fi system, and electronic components for additional functions such as a buzzer for preventing forgetting to turn off the light and forgetting to remove the key. An electrical connection box with an electronic circuit to be. 2. The connection terminal includes an electric connection portion connected to a circuit portion and an electric connection portion connected to a tab protruding upward from the bus bar in a direction orthogonal to each other, and the connection terminals are arranged in parallel. Housings for accommodating and holding the terminal terminals are provided in the provided terminal accommodating chambers, and the housings accommodate the connection terminals. , The connection terminal housed in the housing together with the electronic circuit board is set from above, the connection terminal is fitted to the tab of the bus bar, and the electronic circuit board is placed on the upper surface of the pedestal protruding from the lower case. The electric junction box with an electronic circuit according to claim 1, wherein an upper case is assembled to the lower case so as to cover the electronic circuit board.