JP2953484B2 - 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 an electric connection box such as a relay box interposed in a wire harness for an automobile.

[0002]

2. Description of the Related Art FIG. 7 shows a relay box, which comprises a main body a, an upper cover b and a lower cover c. A circuit is formed by inserting and locking a terminal fitting t connected to an electric wire w constituting a wire harness in advance (see FIG. 8).

In this case, since the terminal insertion portions of the relay box are concentrated in a large number of terminal accommodating chambers e, the wiring work becomes complicated and difficult, and the productivity is very poor.

[0004]

SUMMARY OF THE INVENTION In view of the above, the present invention focuses on the above points, and provides a part of a terminal fitting in a connector housing in advance and provides an internal circuit such as a short circuit and a joint circuit between the terminal fittings. By inserting other terminal fittings connected to the wires of the external circuit into the corresponding terminal accommodating chambers, the number of steps for inserting the terminal fittings connected to the external circuit into the electrical connection box is reduced, thereby improving the quality and changing the circuit. It was easy.

[0005]

In order to achieve the above object, according to the present invention, a floor is provided on the back side of an electric junction box.
A terminal fitting having a press- fitting type electric wire connection part for a part of a plurality of terminal accommodating chambers such as a relay opened on a plate is connected to the press- fitting type electric contact.
A wire connecting portion is inserted in a state where the wire connecting portion protrudes from the floor plate to the back surface side, and an electric wire is connected between a plurality of the press-contact type electric wire connecting portions.
The internal circuit is formed between the terminal fitting Te, on the floor plate
An insertion hole corresponding to the other part of the terminal accommodating chamber is provided in a lower cover provided to cover the internal circuit , and a terminal fitting connected to an electric wire of an external circuit is provided from the insertion hole to the other part of the terminal accommodating chamber. The lower cover having an insertion hole corresponding to the terminal accommodating chamber provided with the flexible locking piece for the terminal fitting is temporarily inserted into the electric connection box. A movement preventing member which enters the terminal accommodating chamber is provided at an edge of the insertion hole so as to protrude at an edge of the insertion hole. It is characterized by entering into.

[0006]

The terminal fitting connected to the electric wire of the external circuit is inserted into the corresponding terminal accommodating chamber through the insertion hole of the lower cover. The movement preventing member allows the flexible locking piece to move in the temporarily connected state, and prevents the movement of the flexible locking piece in the fully connected state.

[0007]

EXAMPLES In FIG. 1, A is a relay box body as an example of an electrical junction box, A ₁ is a lower cover. A large number of terminal accommodating chambers 1 and 2 are formed in the relay box main body A, and a female terminal fitting 3 having a press-fitting type electric wire connection portion 3a is press-fitted into a part of the terminal accommodating chamber 1 from the back side and locked. I have.

That is, a narrow groove portion 1a is formed on one side of the terminal receiving chamber 1 for receiving the female terminal fitting 3, and the connecting plate 3b of the female terminal fitting 3 is inserted into the terminal receiving chamber 1 of the female terminal fitting 3. At this time, it is press-fitted into the narrow groove portion 1a, and the pressure-contact type electric wire connection portion 3a is fixed in a state protruding below the floor plate 4 of the electric connection box A (FIG. 2). Then, the electric wire 5 is press-fitted and connected between the desired press-contact type electric wire connecting portions 3a by an automatic wiring machine (not shown) to form an internal circuit such as a short circuit or a joint circuit.

The floor panel 4 has a male terminal 6a and a connecting portion 6a.
A joint absorption terminal 6 provided with a press-contact type electric wire connection portion 6c is provided via the terminal b (see FIG. 3), and the electric wire 5 of the internal circuit is also connected to the press-contact type electric wire connection portion 6c. In the above embodiment, the wires of the internal circuit are connected between the terminal fittings after the terminal fittings are attached to the terminal receiving chambers, but the terminal fittings are connected in advance by wires or the like and then inserted into the terminal receiving chambers. May be.

[0010] Under the cover A ₁ is an electrical junction box and the insertion hole 7 corresponding to the male terminal portion 6a of the terminal receiving chamber 2 and the joint absorbing solderless terminal 6 is formed of A, constituting a wire harness of an external circuit A female terminal fitting 8 previously connected to the electric wire W to be inserted is inserted and locked into the terminal accommodating chamber 2 through the insertion hole 7, and is connected to the male terminal portion 6 a of the joint absorbing terminal 6. On the inner peripheral surface of the lower peripheral wall 9 of the electric junction box A, a temporary locking projection 10 having a tapered guide surface 10a and a full locking projection 11 having a tapered guide surface 11a are provided in a stepwise manner. retaining projection 13 having a tapered abutting surface 13a on the outer peripheral surface 12 of the lower cover a ₁ is provided Te (Figure 4). Lower cover A ₁ is set to the temporary bonding state of locking projections 13 to the electric connection box A is engaged with the partial locking projections 11 (see FIG. 5 (A)), the lower cover A ₁ then is engaged by pushing The stop projection 13 is held in a fully connected state in which it is engaged with the final locking projection 11 (see FIG. 5B).

[0011] Provisional in bound state, the peripheral movement hampering member cylindrical projecting from the inside of the insertion hole 7 of the lower cover A ₁ 1
4 partially enters the terminal accommodating chamber 2 of the electric connection box A, and permits the flexible displacement operation of the flexible locking piece 15 (FIG. 6).
(A)). In this state, the female terminal fitting 8 is inserted into the terminal accommodating chamber 2 from the insertion hole 7, and the locking projection 15a of the flexible locking piece 15 is engaged with the locking hole 8a and locked (FIG. 6 ( B)) In this state, the lower cover A ₁ is pushed in to move the movement preventing member 14 into the flexible displacement allowable space 16 of the flexible locking piece 15, thereby preventing the flexible locking piece 15 from being displaced. Terminal fitting 8
Is secured (FIG. 6C).

[0012]

As described above, according to the present invention, there is provided a terminal fitting having a press-fitting type electric wire connection part with respect to a part of a plurality of terminal accommodating chambers such as relays opened on a floor plate on the back side of an electric connection box. An internal circuit is formed between the terminal fittings by inserting the press-contact-type electric wire connection portion in a state of protruding from the floor plate to the back side and connecting an electric wire between a plurality of the press-contact-type electric wire connection portions,
An insertion hole corresponding to the other part of the terminal accommodating chamber is provided in a lower cover provided over the floor board so as to cover the internal circuit, and the insertion hole is connected to an external circuit wire from the insertion hole to the other part of the terminal accommodating chamber. Since the terminal fittings are inserted and locked,
Easily None obtained by circuit change in the electrical junction box changes the internal circuit, the external round by the presence of an internal circuit
While reducing the required number of terminal fittings connected to the road,
Reduce the insertion trouble of the terminal fitting of an external circuit by a large margin the expansion of the connected terminal fitting mutual insertion interval to an external circuit to give al
Terminal fittings connected to the external circuit,
The insertion position is clearly indicated by the insertion hole formed in the lower cover, so that the insertion work is easy and
In addition, it has a great effect in preventing erroneous connection of the terminal fitting.
I do.

In addition, a lower cover having an insertion hole corresponding to a terminal accommodating chamber provided with a flexible locking piece for a terminal fitting is provided in an electric connection box in two stages of a temporary connection state and a full connection state. At the edge of the hole, a movement preventing member that protrudes into the terminal accommodating chamber is protruded, and in the fully connected state, the movement preventing member enters the flexible displacement allowable space of the flexible locking piece. Utilization of the cover makes it possible to securely lock the terminal fitting.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of one embodiment of the present invention.

FIG. 2A is a perspective view of a female terminal fitting and a terminal accommodating chamber.
(B) is a perspective view of the state where the female terminal fitting was inserted into the terminal accommodating chamber.

FIG. 3 is a perspective view of a joint absorption terminal.

FIG. 4 is a perspective view showing an engagement structure between an electric connection box and a lower cover.

FIG. 5A is a cross-sectional view showing a temporary connection state between an electric connection box and a lower cover, and FIG. 5B is a cross-sectional view showing the same connection structure.

FIGS. 6A and 6B are cross-sectional views of a main portion of the electric connection box and the lower cover, wherein FIG. 6A shows a temporary connection state, FIG. 6B shows a terminal metal insertion state in FIG. Show.

FIG. 7 is a perspective view of a conventional electric junction box.

FIG. 8 is a rear view of the main body in the same.

[Explanation of symbols]

A electric junction box A ₁ lower cover 2 terminal accommodating chambers 3, 6 terminal fitting 3a, the wire W external circuit of the electric wire 8 terminal fitting 6c pressure-contact wire connecting portion 4 floorboard 5 internal circuit 7 insertion hole 14 movement hampering member 15 Flexible locking piece 16 Flexible displacement allowable space

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-1609 (JP, A) JP-A-4-366571 (JP, A) JP-A-3-120627 (JP, U) JP-A-4-160627 43329 (JP, U) Japanese Utility Model Sho 62-132628 (JP, U) Japanese Utility Model Application Hei 4-116378 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 3/00

Claims (2)

(57) [Claims] A pressure is applied to a part of a plurality of terminal accommodating chambers, such as relays, which are opened in a floor plate on the back side of an electric junction box.
The terminal fitting having the contact type electric wire connection portion is connected to the pressure contact type electric wire connection portion.
The the internal circuits formed between the terminal metal fitting to connect the wire between the plurality of piezoelectric contact type wire connection portion is inserted in a state of being projected from the floor plate to the back surface side, internal times on the floor plate
An insertion hole corresponding to the other portion of the terminal accommodating chamber is provided in the lower cover provided to cover the road , and a terminal fitting connected to the electric wire of the external circuit is inserted into the other portion of the terminal accommodating chamber from the insertion hole, An electric connection box, characterized by being locked. 2. A lower cover having an insertion hole corresponding to a terminal accommodating chamber provided with a flexible locking piece for a terminal fitting is provided to an electric connection box in two stages of a temporary connection state and a full connection state. A movement preventing member which protrudes into the terminal accommodating chamber is protruded at an edge of the hole, and the movement preventing member enters the flexible displacement allowable space of the flexible locking piece in the fully connected state. Item 2. An electric connection box according to item 1.