JPH06325815A - Electric connection box - Google Patents

Abstract

PURPOSE:To mount a rear holder surely and easily and to prevent defective connection of a terminal, falling off of parts, or the like. CONSTITUTION:An electric connection box 51 is provided with an electric connection box main body 3, terminal storage parts 11, 15 arranged in the electric connection box main body 3, terminals 9, 13, a rear holder 53, and a lower part cover 7, and the terminal storage parts 11, 15 are provided with a lock pieces 17, 21, which engage with lock parts 19, 23 of the terminals 9, 13 inserted to the proper positions individually. The rear holder 53 is provided with touching parts 27, 57, which touch a position 63 to be brought into contact with the terminals 9, 13 and hold the terminals 9, 13 in the proper positions when installation of the rear holder 53 is finished, while a pressing piece 55, which presses the rear holder 53 due to the installation of the lower part, cover 7 and hold the rear holder 53 in the installation finish position when installation of the lower part cover 7 is finished, is arranged in at least one of the rear holder 53 and the lower part cover 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box mainly mounted on an automobile.

[0002]

2. Description of the Related Art As a conventional example of an electrical junction box, a
The one described in Japanese Patent No. 113274 is known.

4 and 5 show the structure of a conventional electrical junction box 1 similar to the electrical junction box described in the above publication. 4 is a side sectional view of the electric junction box 1 in an assembled state, and FIG. 5 is an exploded perspective view of the electric junction box 1.

The electric junction box 1 has an electric junction box body 3 having an opening 5 in a bottom portion 3a, a rear holder 4 mounted in the electric junction box body 3 through the opening 5, and an opening attached to the electric junction box body 3. 5 and a lower cover 7 for covering 5. Inside the electrical junction box body 3, a bus bar housing portion 11 (terminal housing portion) housing and holding a bus bar 9 (terminal) for power supply, and a plurality of terminal housing chambers housing load side terminals 13 (terminals). 15 (terminal accommodating portion) is formed. Both of the bus bar housing portion 11 and the terminal housing chamber 15 are formed with openings on the bottom 3a side, and the bus bar 9 and the load side terminal 13 are inserted through the opening 5 of the electrical junction box body 3.

In the bus bar housing portion 11, a bus bar locking piece 17 (locking piece) is provided upright from the side wall 3b of the electric junction box body 3. The tip portion 17a of the bus bar locking piece 17 is
It engages with a locking portion 19 projecting from the bus bar 9 and
The bus bar 9 is held at an appropriate position so that a is sufficiently exposed.

In the terminal accommodating chamber 15, a terminal engaging piece 21 (engaging piece) is provided upright from the side wall 15a of the accommodating chamber. The tip of the terminal locking piece 21 engages with the locking portion 23 formed on the load side terminal 13, and the tip 1 of the load side terminal 13 is engaged.
Hold in a proper position so that 3a is fully exposed.

The rear holder 4 is a plate-shaped holder substrate 25.
And four flexible claws 27 (contact portions). A flexible projecting piece 28 is projected from the holder substrate 25, and a locking hole 29 is formed in the flexible projecting piece 28. Further, a locking protrusion 31 is provided on the side wall 25a of the holder substrate 25 so that when the rear holder 4 is pressed toward the opening side of the terminal accommodating chamber 15, the flexible claws 27 are inserted into the terminal accommodating chamber 15 respectively. The stop hole 29 and the locking projection 31 are engaged with an engaging portion (not shown) on the electric junction box body 3 side, and the rear holder 4 is attached to the electric junction box body 3.

The flexible claw 27 is provided so as to project from the holder substrate 25 toward the electric junction box body 3 side. Each flexible claw 27 is bifurcated from the middle, and a groove 35 is formed between them. Further, as shown in FIG. 6, an electric wire W is crimp-connected to the caulking portion 36 at the lower end of the load-side terminal 13. Two portions of the load-side terminal 13 facing each other in the width direction of the load-side terminal 13 are spaced apart from each other by a distance X which is slightly larger than the width of the terminal locking piece 21 and are close to the caulking portion 36 of the load-side terminal 13. The contact portion 33 is provided upright, and the locking portion 23 is formed between the contacted portions 33. That is, with the rear holder 4 attached,
Both ends of the branched flexible claw 27 are respectively abutted portions 33.
The terminal holder piece 21 is inserted into the groove portion 35 and engaged with the stopper portion 23 while contacting the lower end 33a of the rear holder 4 and the rear holder 4 prevents the load terminal 13 from coming off.

An engaging frame 43 is provided on the lower cover 7,
An engagement protrusion 41 is provided on the electric junction box body 3.
When the lower cover 7 is attached to the electric junction box body 3, the engagement protrusion 41 engages with the engagement frame 43, and the electric junction box body 3 and the lower cover 7 are locked to each other.

To assemble these, first, the bus bar 9
Is inserted into the bus bar housing portion 11 through the opening 5, and then the load side terminal 13 is inserted through the opening 5 into the terminal housing chamber 15. At this time, the bus bar locking piece 17 engages with the locking portion 19 and the terminal locking piece 21 engages with the locking portion 23, so that both the bus bar 9 and the load side terminal 13 are held in proper positions. Fully engaged.

Next, the rear holder 4 is mounted. At this time, the flexible claw 27 is inserted into the terminal accommodating chamber 15 and abuts on the locking portion 33 of the load-side terminal 13. Finally, the lower cover 7 is attached and the assembling is completed.

[0012]

By the way, in the electric junction box, when the rear holder 4 is mounted, the holder substrate 25 is opened from the opening 5 through the opening 5 by the fingertip or the like.
Must be inserted inside. For this reason, there is a possibility that the lower cover 7 may be assembled while the mounting state of the rear holder 4 is incomplete. In such a case, load side terminal 1
There is a possibility that it may not be possible to reliably prevent the removal of item 3.

If the load side terminal 13 is not fully engaged with the terminal locking portion 21 and the rear holder 4 is not mounted properly, there is a possibility that the electrical connection may be defective.

Further, with respect to the bus bar 9, like the load side terminal 13, there is a possibility that the bus bar 9 may come off or have a defective connection.

In view of the above circumstances, it is an object of the present invention to provide an electric junction box in which the rear holder can be securely mounted and the rear holder can eliminate defective connections and parts falling off.

[0016]

In order to solve the above-mentioned problems, an electric junction box according to the present invention is provided with an electric junction box main body having a bottom opening, and a terminal housing provided on the electric junction box main body and having the bottom side opened. A terminal, a terminal inserted into the terminal housing from the bottom side, a rear holder mounted on the opening side of the terminal housing, and a lower cover attached to the bottom of the electrical junction box body, A locking piece that engages with the locking part of the terminal is provided in the housing part, and the rear holder is
When the rear holder is mounted, a contact portion that contacts the contacted portion of the terminal and holds the terminal at an appropriate position when the rear holder is completely mounted is provided, and at least one of the rear holder and the lower cover is provided with the lower cover. There is provided a pressing piece that presses the rear holder by mounting and holds the rear holder at the mounting completion position when the mounting of the lower cover is completed.

[0017]

In the electric connection box having the above structure, the terminal is inserted into the terminal accommodating portion, the rear holder is attached to the opening side of the terminal accommodating portion,
When the lower cover is attached, the rear holder is pressed, and the rear holder is held at the attachment completion position when the attachment of the lower cover is completed. At the mounting completion position, the contact portion of the rear holder contacts the contacted portion of the terminal, and the terminal is held at the proper position when the rear holder is completely mounted.

That is, when the lower cover is completely attached,
Since the rear holder is held at the mounting completion position and the terminal is held at the proper position, the rear holder can be securely mounted by a simple work, and the terminal does not become incompletely engaged and the connection failure is prevented. It can be prevented. Further, since the rear holder is held at the mounting completion position, the terminal is held at the proper position, and the terminal and the rear holder do not fall off.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3.

FIG. 1 is a sectional view of the electric connection box 51 of the present embodiment in an assembled state, FIG. 2 is an exploded perspective view showing the overall structure of the electric connection box 51, and FIG. 3 is an enlarged view of a main part of FIG.

This electrical junction box 51 differs from the electrical junction box 1 of FIGS. 3 and 4 in the following points. The same parts as those of FIGS. 3 and 4 are designated by the same reference numerals and their description is omitted. Omit it.

From the holder substrate 25 of the rear holder 53,
The pressing piece 55 extends substantially vertically toward the side opposite to the flexible claw 27. The tip of the pressing piece 55 is bent toward the side wall 3b of the electric junction box body 3 to form an L-shaped bent portion 57. That is, when the rear holder 53 is attached to the electrical junction box body 3 and the lower cover 7 is attached, the lower surface 57a of the bent portion 57 contacts the upper surface 7a of the side wall of the lower cover 7. The pressing piece 55 is provided on the rear holder 53 when the lower cover 7 is completely attached.
To a predetermined position near the opening 5 of the electrical junction box body 3 so as to hold the electrical connection box at the mounting completion position.

Further, the other end side 61 of the bus bar 9 is extended, and the tip end thereof is bent toward the side wall 3b in an L shape to form a contacted portion 63. That is, when the rear holder 53 is completely attached to the main body 3 of the electrical junction box, the locking portion 19 is completely engaged with the bus bar locking piece 17, and the lower cover 7 is completely attached, the contacted portion 63 is Upper surface 5 of bent portion 57 (contact portion)
It is set so as to come into contact with 7b.

To assemble these, first, the bus bar 9
Is inserted into the bus bar housing portion 11 through the opening 5, the load side terminal 13 is then inserted through the opening 5 into the terminal housing chamber 15, the rear holder 53 is attached, and finally the lower cover 7 is attached.

In the state where the lower cover 7 is completely attached, the lower surface 57a of the bent portion 57 of the rear holder 53 contacts the side wall upper surface 7a of the lower cover 7, the rear holder 53 is held at the mounting completion position, and the load side terminal 13 is held. Are held in perfect fit. At this time, the contacted portion 6 of the bus bar 9
3 contacts the upper surface 57b of the bent portion 57, and the bus bar 9 is also held in the completely engaged state. Therefore, the bus bar 9 and the load-side terminal 13 are reliably prevented from coming off from the electric connection box 51.

Further, if the bus bar 9 or the load side terminal 13 is assumed.
If the lower cover 7 is attached to the electrical junction box body 3 when the rear holder 53 is not completely attached and the lower cover 7 is not completely attached, the side wall upper surface 7a of the lower cover 7 has the bent portion 57 of the rear holder 53. At this time, the rear holder 53 is pressed to the mounting completion position, so that the bus bar 9 and the load-side terminal 13 can always be held in the completely locked state.

Further, since the pressing piece 55 is extended to the opening 5 side, when the rear holder 4 is mounted, the pressing piece 55 can be mounted while pushing it with a finger, and the lower cover 7 and other parts can be mounted. Since the work can be performed in the same manner as the conventional work, the workability is improved.

Although the pressing piece 55 is provided on the rear holder 53 in this embodiment, it may be provided on the lower cover 7 side.

[0029]

As described above, according to the present invention,
In addition to improving workability when mounting the rear holder,
It is possible to reliably prevent connection failure of the terminals and dropping of parts.

[Brief description of drawings]

FIG. 1 is a sectional view of an electrical junction box according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an electric junction box according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of the main parts of FIG.

FIG. 4 is a sectional view of a conventional electrical junction box.

FIG. 5 is an exploded perspective view of a conventional electric junction box.

FIG. 6 is a view showing a load side terminal, (a) is a front view,
(B) is a view from the direction B of (a), (c) is (a)
FIG. 6 is a view from the direction C in FIG.

[Explanation of symbols]

 3 Electrical Connection Box Main Body 5 Opening 7 Lower Cover 9 Bus Bar (Terminal) 11 Bus Bar Housing (Terminal Housing) 13 Load Side Terminal (Terminal) 15 Terminal Housing (Terminal Housing) 17 Bus Bar Locking Piece (Locking Piece) 19 Locking Part 21 Terminal Locking Part (Locking Part) 23 Locking Part 27 Flexible Claw (Abutting Part) 33 Abutted Part 51 Electrical Connection Box 53 Rear Holder 55 Pressing Part 57 Bending Part (Abutting Part) 63 Contacted part

Claims (1)

[Claims] 1. An electric junction box body having an open bottom, a terminal accommodating portion provided in the electric junction box main body and having an opening at the bottom side, a terminal inserted into the terminal accommodating section from the bottom side, and the terminal. A rear holder attached to the opening side of the housing portion; and a lower cover attached to the bottom of the electrical junction box body, wherein the terminal housing portion is provided with a locking piece that engages with the locking portion of the terminal, The rear holder is provided with an abutting portion that abuts on the abutted portion of the terminal when the rear holder is mounted, and holds the terminal at an appropriate position when the mounting of the rear holder is completed, and at least one of the rear holder and the lower cover is provided with An electrical junction box comprising a pressing piece that presses the rear holder by mounting the lower cover, and holds the rear holder at the mounting completion position when the mounting of the lower cover is completed.