JP3143397B2 - Connection structure between electronic unit and electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between an electronic unit and an electric connection box, in which electronic units of different sizes can be connected to one type of electric connection box.

[0002]

2. Description of the Related Art FIGS. 8 to 10 show a conventional connection structure between an electronic unit and an electric connection box.

As shown in the drawings, according to this connection structure, 1
Both the small electronic unit 3 and the large electronic unit 5 can be connected to the kind of electric connection box 1.

That is, the electronic unit mounting portion 7 of the electric connection box 1 is provided with two locking projections 11 in addition to the connector 9 into which the terminal groups of the electronic units 3 and 5 are inserted. , Whereas a small electronic unit 3
Is provided with a flexible lock portion 13 having a narrow width (W1), and the large-sized electronic unit 5 is provided with a flexible lock portion 15 having a wide width (W2).

When the small electronic unit 3 is connected to the electric connection box 1, the lock 13 is locked to only one of the locking projections 11 as shown in FIG. 9 and the large electronic unit 5 is connected to the electric connection box 1. When connecting to the lock unit 15 as shown in FIG.
Locks on both locking projections 11, 11.

[0006] In this way, the small and large electronic units 3 and 5 can be connected to one type of electric junction box 1, and the lock portion 15 has a large width for the large electronic unit 5. By locking both of the locking projections 11, 11, the supporting strength is increased, and for example, vibration of the electronic unit 5 when vibration of the vehicle is applied and loosening of the connection due to the vibration are prevented.

[0007]

However, in the conventional connection structure, the extension direction of the electronic units 3 and 5 (FIGS. 9 and 10).
Is indicated by an arrow 17) is a free end,
When handling a larger electronic unit than the large electronic unit 5, the vibration at the free end increases, and further, due to its own weight and the tension of the connecting wires, the fixing function of the electronic unit and the loosening of the connector part The prevention function becomes insufficient.

In the conventional connection structure, for such a reason,
Electronic units having greatly different sizes cannot be connected to one type of electrical junction box, and so many types of electrical junction boxes are required, and the number of parts and connection work are increased,
Increases cost.

In view of the above circumstances, the present invention is a connection structure between an electronic unit and an electric connection box that can connect electronic units of different sizes to one type of electric connection box, and supports a large-sized electronic unit. It is an object of the present invention to provide a connection structure in which the size range of connectable electronic units is increased by enhancing the functions, and the number of parts, the number of connection work steps and the cost are reduced.

[0010]

According to a first aspect of the present invention, there is provided a connection structure between an electronic unit and an electric connection box, wherein the positions of electric connection portions and mutual locking portions are different between the electronic unit and the electric connection box. The structure of the electronic unit and the electrical connection box, in which large and small electronic units of different sizes can be connected to one type of electrical connection box by unifying electronic units of different sizes, A bracket is provided on the free end side of the large-sized electronic unit, and a bracket of the electric connection box is provided.
The housing part is provided with a housing hole and housed in this housing hole.
A projection is provided on a bracket of the electronic unit,
Unit bracket and electrical junction box bracket
Both are fastened together by the fixing means to the mounting side member.
With the brackets fastened together, this protrusion will
It is characterized by directly receiving the fastening force of the fixing means together with the bracket part .

As described above, according to the first aspect of the present invention, the bracket is provided on the free end side of the large-sized electronic unit, and the bracket is fastened together with the bracket of the electric connection box by the fixing means. The strength is remarkably improved, and the electrical and mechanical connection functions are kept normal for a long time.

In this way, since the support function of the large electronic unit is improved, it is possible to connect electronic units having different sizes in a wide range from small to large to one type of electric connection box. The connection with the various types of electronic units can be handled with a small number of electric connection boxes, and the number of parts, the number of connection work, and the cost are greatly reduced accordingly. In addition, a state in which the bracket of the electronic unit is stored in the receiving hole formed in the bracket of the electric connection box, that is, a state in which the bracket of the electronic unit is stored in the thickness of the bracket of the electric connection box Since the brackets are fastened together, the effect of improving the support function of the large electronic unit as described above can be obtained without increasing the thickness of the brackets of the electric connection box. As described above, the fact that the bracket portion (electric junction box) is not thickened, and therefore the mounting space is small, is extremely advantageous, for example, when mounting to a vehicle body or a door of the vehicle body.

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This embodiment has the features of the first and second aspects. In the following description, members without reference numerals are not shown.

In the connection structure of this embodiment, an electric connection box 21 is provided with a large-sized high-grade electronic unit 23 shown in FIGS. 1 to 3 and a small-sized small electronic unit 25 shown in FIG. Connecting. The electric connection box 21 is attached to a vehicle body (an attachment-side member).

Each of the electronic units 2
A connector 27 for inserting the terminal groups 3 and 25, an insertion fixing portion 29 that engages with a metal bracket on the vehicle body side, locking projections 31 and 31, a bracket portion 33, and the like are provided.

As shown in FIGS. 2, 3, and 4, each electronic unit 2
3 and 25 are provided with flexible locking portions 35 and 35 for locking to the locking projections 31.
7, 37 are constituted.

The large electronic unit 23 has wires
Two connectors 39 for connection to a harness are provided, and one connector 39 is provided for the small electronic unit 25.

Further, the large-sized electronic unit 23 is provided with a bracket portion 41 at the same position as the bracket portion 33 of the electric connection box 21, as shown in FIGS.

As shown in FIGS. 2 and 3, the large electronic unit 23 is connected and attached by inserting the terminal group of the electronic unit 23 into the connector 27 of the electric connection box 21 and engaging the lock portion 35 with the locking projection 31. When the locking portions 37 are stopped and locked, the electric connection box 21 and the electronic unit 23 and the respective bracket portions 33 and 41 are integrated. In this state, bolts (fixing means) are passed through the bolt holes 43 and 45 of the bracket portions 33 and 41, and the electric connection box 21 and the electronic unit 2 are inserted.
3 is fixed to the vehicle body.

As shown in FIG. 4, the connection and attachment of the small electronic unit 25 are performed by inserting the terminal group of the electronic unit 25 into the connector 27 of the electric connection box 21, and
5 is locked to the locking projection 31 to lock each locking portion 37.

Thus, the connection structure of the first embodiment is configured.

In this connection structure, as described above, the large-sized electronic unit 23 is fixed and connected at three places by the locking portions 37 and 37 and the connector 27,
Since the bracket portion 41 is fastened to the vehicle body together with the first bracket portion 33, the electric connection strength and the fixing strength to the electric connection box 21 are extremely high.

Further, the bracket unit 4 of the electronic unit 23
Conventionally, the first side is a free end, and by fixing the free end, the electrical and mechanical connection strength of the electronic unit 23 is greatly improved.

Further, the small electronic unit 25 is
7 and 37 and the connector 27 are fixed to the electric junction box 21 at three places, and the free end 47 of the electronic unit 25 has a short distance from the locking portions 37, 37, so that sufficient electric and mechanical connection is achieved. Gaining strength.

Therefore, even if vibration of the vehicle is applied, or even if it receives its own weight or the tension of the wire harness to be connected, vibration of the electronic units 23 and 25 and slackness of the connector 27 due to the vibration are prevented. The electrical and mechanical connection strength is maintained for a long time.

As described above, since the bracket 41 is provided to improve the support function of the large-sized electronic unit 23, unlike the conventional example, the electronic units 23 and 25 having greatly different sizes are connected to one type of electric unit. Connection to the connection box 21 is now possible.

In this way, the number of types of electrical connection boxes required for various types of electronic units can be reduced, the number of parts and the number of connection work are reduced, and the cost is reduced.

Next, the second embodiment of the present invention will be described with reference to FIGS.
An embodiment will be described. This embodiment has the features of claims 1 and 3. Note that in the description of the second embodiment of FIGS. 5 to 7, redundant description of common members with the first embodiment will be omitted.

In the connection structure according to this embodiment, a large-sized high-grade electronic unit 53 and a small-sized low-grade electronic unit shown in FIGS. This electric connection box 51 is attached to the vehicle body (attachment side member).

As in the electric connection box 21 of the first embodiment, the electric connection box 51 has a connector 55 for inserting the terminal groups of the large electronic unit 53 and the small electronic unit, and a plug for engaging with the metal bracket on the vehicle body side. A fixing portion 57, locking projections 59, 59, a bracket portion 61 and the like are provided.

The large-sized electronic unit 53 is provided with a flexible locking portion 63 which is locked to the locking projection 59.
9 together with a locking portion 65. Similarly, the small-sized electronic unit is also provided with a flexible lock portion that locks with the locking protrusion 59, and forms a locking portion.

The large electronic unit 53 is provided with two connectors 67 for connection to the wire harness, and the small electronic unit is provided with one connector 67.

Further, the large electronic unit 53 has a bracket 6 at the same position as the bracket 61 of the electric connection box 51.
9 are provided.

As shown in FIG. 7, the bracket portion 61 of the electric connection box 51 is provided with three receiving holes 71, 73, and 75, and the bracket portion 69 of the electronic unit 53 is provided.
Is composed of three arms 77, 79, 81 (protrusions) housed in the housing holes 71, 73, 75, respectively.

Each of the arms 77, 79, 81 is provided with a bracket 61.
Side, so that the electronic unit 53 is
, And each arm 77, 79, 81 has a receiving hole 71,
When the arms 73, 75, 81 are accommodated in the arms 73, 75, the upper surfaces 83, 85 of the bracket 69 are substantially flush with each other.

5 and 6, the terminal group of the electronic unit 53 is inserted into the connector 55 of the electric connection box 51, and the lock section 63 is connected.
Is locked to the locking projection 59 to lock each locking portion 65, the electric connection box 51 and the electronic unit 53 are integrated,
At this time, the arms 77, 79, 81 of the electronic unit 53 are accommodated in the accommodation holes 71, 73, 75 of the electric connection box 51.
In this state, the electric connection box 51 and the electronic unit 53 are fixed to the vehicle body by passing bolts (fixing means) through bolt holes 87 of the bracket 61.

At this time, as described above, each arm 77, 7
9 and 81 and the upper surface 85 of the bracket 69 are substantially flush with each other, so that the bracket 69 (arms 77, 79 and 81) of the electronic unit 53 and the bracket 61 of the electric junction box 51 are bolted together. A tightening force is applied, and the bracket portions 61 and 69 are jointly tightened by bolts.

As in the case of the small electronic unit 25 in the first embodiment, the terminal group of the small electronic unit is inserted into the connector 55 of the electric connection box 51 and the lock portion is connected to and attached to the small electronic unit. Each locking portion is locked by locking to the locking projection 59.

Thus, the connection structure of the second embodiment is configured.

In this connection structure, similarly to the connection structure of the first embodiment, the large-sized electronic unit 53 has the locking portion 6.
In addition to the fixing and connection at three places by the connectors 5 and 65 and the connector 55, the bracket 69 provided on the free end side together with the bracket 61 of the electric connection box 51 are fastened to the vehicle body together. The electrical connection strength and the fixing strength with respect to 51 are extremely high.

Further, the small electronic unit is provided with locking portions 65 and 6.
5 and the connector 55 are fixed to the electric junction box 51 at three places.
, A sufficient electrical and mechanical connection strength can be obtained.

Therefore, even if vibration of the vehicle is applied, or even if the vehicle receives its own weight or the tension of the wire harness to be connected, vibration of each electronic unit and loosening of the connector 55 due to vibration are prevented. The electrical and mechanical connection strength is kept normal for a long time.

Also, as described above, the bracket 69 is provided to improve the function of supporting the large-sized electronic unit 53. Therefore, unlike the conventional example, the electronic units having widely different sizes in a wide range can be used as one type of electric unit. Connection to the connection box 51 is now possible.

In this way, the number of types of electrical connection boxes required for various types of electronic units can be reduced, the number of parts and the number of connection work are reduced, and the cost is reduced.

In addition, the brackets 69 of the electronic unit 53 are housed in the brackets 61 of the electric connection box 51 and fastened together to increase the thickness of the brackets 61 of the electric connection box 51. Instead, the electronic unit 53 can be firmly fixed.

As described above, it is extremely advantageous that the bracket portion 61 (electric connection box 51) is not thickened, since the mounting space can be thin when the vehicle is mounted on a vehicle or a door of the vehicle. Further, bolts and the like to be used when the thickness is the same can be shared.

[0052]

According to the first aspect of the present invention, the bracket provided on the free end side of the large-sized electronic unit is fastened together with the bracket of the electric connection box by the fixing means. The support function of the electronic unit is significantly improved, and the electrical and mechanical connection functions are maintained for a long time.

By improving the function of supporting the large-sized electronic unit in this way, it is possible to cope with the connection with many types of electronic units with a small number of electric connection boxes.
The number of parts, the number of connection work, and the cost are greatly reduced.
In addition to this, the effect of improving the support function of the large electronic unit can be obtained without increasing the thickness of the bracket part of the electric junction box. It is very advantageous for mounting.

[0054]

[0055]

[Brief description of the drawings]

FIG. 1 is a front view showing a large electronic unit and an electric connection box after connection in a first embodiment of the present invention.

FIG. 2 is a side view showing a large electronic unit and an electric connection box before connection in the first embodiment.

FIG. 3 is a side view showing the large electronic unit and the electric connection box after connection in the first embodiment.

FIG. 4 is a front view showing the small electronic unit and the electric connection box after connection in the first embodiment.

FIG. 5 is a side view showing a large electronic unit and an electric connection box after connection in a second embodiment of the present invention.

FIG. 6 is a front view showing a large electronic unit and an electric connection box after connection in the second embodiment.

FIG. 7 is a perspective view showing a housing hole provided in a bracket portion of an electric connection box and a projection provided in a bracket portion of a large-sized electronic unit and housed in the housing hole in the second embodiment. .

FIG. 8 is a perspective view showing a configuration of a conventional example.

9 is a side view showing an electric connection box to which a small electronic unit is connected in the conventional example of FIG.

FIG. 10 is a side view showing an electric connection box to which a large-sized electronic unit is connected in the conventional example of FIG.

[Explanation of symbols]

 21, 51 Electric connection box 23, 53 Large electronic unit 25 Small electronic unit 33, 61 Bracket part 37, 65 Locking part 41, 69 Large electronic unit bracket part 71, 73, 75 Housing hole 77 , 79, 81 Arms (projections)

Continuation of the front page (72) Inventor Kunihiko Takeuchi 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Prefecture Inside Yazaki Parts Co., Ltd. (56) References JP-A-7-1135720 (JP, A) JP-A-1-101112 (JP, U) Hira 4-137428 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 13/639 H02G 3/08

Claims (1)

(57) [Claims] A single type of electrical connection box is provided by unifying the positions of electrical connection portions and mutual locking portions between electronic units and electrical connection boxes between electronic units of different sizes. A connection structure between an electronic unit and an electric connection box, wherein electronic units of different sizes, large to small, can be connected to each other, wherein a bracket portion is provided on a free end side of the large electronic unit, and a bracket of the electric connection box is provided. The accommodation hole in the part
And the protrusion accommodated in the accommodation hole is
Provided on the bracket of the slave unit,
Fixing the bracket together with the bracket of the electrical junction box
With the mounting side member,
When the joints are tightened, the protrusions
A connection structure between an electronic unit and an electric junction box, wherein the connection unit directly receives the fastening force of the fixing means .