JP3147029B2 - Electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electric junction box,
More specifically, the present invention relates to a structure of a connecting portion for connecting an electric connection box containing various electric devices used in an electric circuit of an automobile to a wire harness or a peripheral device.

[0002]

2. Description of the Related Art Conventionally, various electric devices such as a relay box (hereinafter, referred to as R / B) and a fusible link box (hereinafter, referred to as F / B) used for an electric circuit for an automobile are housed, and a wire is accommodated. 2. Description of the Related Art An electric connection box is installed in a vehicle as a connection branch point of wiring such as a harness.

FIG. 4 shows a part of a conventional electric junction box. The electric device 30 constituting the electric junction box is made of synthetic resin by injection molding. The electric device 30 is integrally provided with a connecting portion 31. The coupling portion 31 is fitted to a connector 35 connected to a wire harness (not shown) or a coupled portion provided in a peripheral device. A pair of opposing surfaces 32 of the coupling portion 31 are provided with a connector 35 or a locking convex portion 33 corresponding to a locking concave portion 36 formed on the inner peripheral surface of the coupled portion. When the coupling portion 31 is fitted to the connector 35 or the coupled portion, the locking projections 33 are engaged with the locking concave portions 36 to prevent the coupling portion from coming out of the connector 35 or the coupled portion.

[0004]

However, in the above-described electric device 30, the locking projection 33 provided on the coupling portion 31 is not provided.
The coupling portion 31 is coupled to the connector 35 or the coupled portion of the peripheral device based on the engagement between the connector 35 and the engagement concave portion 36 provided in the coupled portion. For this reason, the coupling strength between the two is low, and if a force greater than a predetermined force acts in a direction in which the two are released, the coupling portion 31 comes off from the connector 35 or the coupled portion.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to be able to securely lock by fitting into a connected portion provided on a connector or a peripheral device, and to release the lock. To provide an electric junction box that can easily perform the above.

[0006]

To achieve the above object, an invention according to claim 1 includes an upper case and the upper case.
Relay box as an electrical device to be installed in
The fuse box or fuse is located on the top side of the relay box.
The electronic components of the relay are installed and the relay box
On the other side, connect the connector or
The coupling part fitted to the coupling part of the side device is formed integrally.
In the electrical junction box, the intermediate part on one side of the joint is
The elastic arm extends from the distal end to the proximal end of the
Arm part is provided integrally, and it is locked at the middle part of the arm part.
And the locking portion is closer to the proximal end of the coupling portion.
Arm portion with a tapered surface spaced from the outer surface of the arm
And the connecting portion and the connector or the connected portion by the locking portion.
Locking means for holding the mated state is provided.
In addition, the locking means is provided at the tip of the arm portion.
As an unlocking means for unlocking
A release operation unit is integrally formed, and the release operation unit is provided with the relay
Through a through hole provided to penetrate the box
The gist is that it is exposed on the upper surface side of the relay box .

According to a second aspect of the present invention, in the electrical junction box according to the first aspect, the relay box has a recess.
Is formed, and the coupling portion is formed in the recess with a relay box.
The gist is that they are integrally formed .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of the electric connection box 1 of the present embodiment as viewed obliquely from below. The electric connection box 10 includes a rectangular parallelepiped upper case 11 and a relay box (R / B) 12 as an electric device assembled to the upper case 11. The R / B 12 is formed by injection molding using a synthetic resin. The lower case may be fitted to the upper case 11.

An electronic component such as a fuse or a relay is mounted on the upper surface of the R / B 12. As shown in FIG.
A recess 13 is formed on one side of the R / B 12,
Inside, a coupling portion 14 is formed integrally with the R / B 12. As shown in FIG. 2, the coupling portion 14 has a planar rectangular shape and has a plurality of terminal holes 14a. The connector 20 to which the wire harness 21 is connected or a connected portion of a peripheral device is fitted to the connecting portion 14.

As shown in FIG. 3, the connector 20 has a cylindrical fitting portion 22 for accommodating the connecting portion 14, a flat shape identical to that of the connecting portion 14, and is integral with the fitting portion 22. And a main body 23 provided in the main body. A step-shaped locking projection 24 is formed on one inner wall surface of the fitting portion 22. The locking convex portion 24 is provided on the opening side of the fitting portion 22 in the main body 2.
A tapered surface 25 that is more distant from the inner wall surface of the fitting portion 22 toward the third side
It has.

The connected portion of the peripheral device has a fitting portion for accommodating the connecting portion 14 and a main body portion provided integrally with the fitting portion and having the same planar shape as that of the coupling portion 14. . Also in this case, a locking protrusion similar to the locking protrusion 24 of the connector 20 is formed on one inner wall surface of the fitting portion.

An elastic arm portion 15 extending from the distal end portion to the proximal end portion of the coupling portion 14 at one side intermediate portion is provided.
Are provided integrally. A locking projection 16 as a locking portion that engages with the locking projection 24 is provided at an intermediate portion of the arm 15.
Are protruding. The locking convex portion 16 has a tapered surface 17 that is separated from the outer surface of the arm portion 15 toward the proximal end of the coupling portion 14.
It has. In the present embodiment, a locking means is constituted by the arm portion 15 and the locking projection 16, and is engaged with the locking projection 16 when the connector 20 or the connected portion of the peripheral device is fitted to the coupling portion 14. The stop projections 24 engage with each other, and hold the coupling portion 14 and the connector 20 or the coupled portion of the peripheral device in a fitted state.

A release operation section 18 as a lock release means is integrally formed at the tip end of the arm section 15.
8 is a through hole 10a provided to penetrate the R / B 12
Through the connector 20 or on the opposite side of the fitting side of the connected part of the peripheral device, that is, on the upper surface side of the R / B 12.

Next, an operation when the connector 20 is fitted to the R / B 12 will be described. The connector 20 is gripped and the fitting portion 22 is fitted to the coupling portion 14. At this time, when the tapered surface 17 of the locking projection 16 of the coupling portion 14 comes into contact with the tapered surface 25 of the locking projection 24 of the connector 20, the tapered surface 2
A pressing force acts from 5 toward the tapered surface 17 side. Due to this pressing force, the arm portion 15 is elastically deformed inward to allow the connector 20 to be fitted. When the contact between the tapered surfaces 17 and 25 disappears, the arm portion 15 is elastically restored, and the locking convex portion 1 is formed.
6 and the locking projection 24 are engaged with each other, and the coupling portion 14 and the connector 20 are held in a fitted state.

In order to remove the connector 20 from the joint 14 of the R / B 12, the upper surface of the R / B 12
When the release operation section 18 is pressed in a direction away from the fitting section 22, the arm section 15 is elastically deformed, and the engagement between the locking projection 16 and the locking projection 24 is released. In this state, when the connector 20 is pulled in the detaching direction, the connector 20 can be detached from the coupling portion 14.

Also, when the connecting portion 14 of the R / B 12 is directly fitted to or removed from the connected portion of the peripheral device,
This is the same as the case of the connector 20. As described above, according to the present embodiment, the arm 15 is connected to the joint 14 of the R / B 12.
And a locking means composed of a locking projection 16 and engaging the locking projection 16 with the connector 20 or the locking projection 24 provided on the connected portion of the peripheral device to fit the coupling portion 14 and the connector 20 together. It was made to keep in the state. Therefore, the coupling strength between the two is increased, and the fitting state between the coupling portion 14 and the connector 20 can be reliably maintained.

On the upper surface side of the R / B 12, the arm 15 is elastically deformed by pressing the release operation section 18 in a direction away from the fitting section 22, thereby causing the locking projection 16 to be elastically deformed.
And the engagement projection 24 can be released, and the lock between the coupling portion 14 and the coupled portion of the connector 20 or the peripheral device can be easily released.

[0018]

As described in detail above, according to the present invention,
It is possible to lock securely to fit into the coupling portion provided on the connector or the peripheral device, the relay box
Unlocking can be easily performed on the upper surface side .

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric junction box according to an embodiment.

FIG. 2 is a cross-sectional plan view of a main part of one embodiment.

FIG. 3 is a front sectional view of a main part of one embodiment.

FIG. 4 is a partial front sectional view showing a connecting portion in a conventional mode.

[Explanation of symbols]

14 ... connecting part, 15 ... arm part constituting lock means,
16... A locking projection as a locking portion constituting the locking means;
18: release operation unit as lock release means; 20: connector.

Claims (2)

(57) [Claims] 1. An upper case and an assembly to the upper case.
Relay box as an electrical device
The fuse or relay power is placed on the top side of the relay box.
Child parts are attached, on the opposite side of the relay box
Is the connector of the wire harness or peripheral equipment
An electrical connection in which a coupling portion to be fitted to a coupling portion is integrally formed.
In the continuation box, the intermediate portion on one side of the connecting portion extends from the distal end to the proximal end.
The extending and elastic arm portion is provided integrally.
A locking portion protrudes from an intermediate portion of the arm portion.
The part is more distant from the outer surface of the arm part toward the proximal end side of the coupling part.
With a tapered surface between
To keep the mating part and the connector or mating part in a mated state
Locking means, and the arm portion
The tip of the lock is unlocked by the locking means.
Release operation part as lock release means for
The release operation part is set so as to penetrate the relay box.
Exposed on the upper surface side of the relay box through the
An electric junction box characterized by being put out. 2. The electrical junction box according to claim 1, wherein a recess is formed in the relay box, and a recess is formed in the recess.
An electrical connection box in which the coupling portion is formed integrally with a relay box .