JP2888140B2 - Electrical junction box with insulation displacement terminals - 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 junction box having an insulation displacement terminal for a motor vehicle, and more particularly, to a large number of fuses,
In an electric connection box that arranges electric circuits including relays intensively and makes branch connections of wire harness rationally,
The internal circuit is composed of electric wires and press-connecting terminals, and particularly enables the press-connecting terminals to be easily and reliably fixed.

[0002]

2. Description of the Related Art Conventionally, in this type of electric junction box, an electric wire is used instead of a bus bar formed by punching a conductive metal plate, as a structure which can easily cope with a change in design of an internal circuit. There is provided an apparatus in which wiring is performed and connection between the electric wires and external input / output terminals and connection between the electric wires are performed by press contact terminals.

In the case where an internal circuit composed of the electric wires and the press contact terminals is provided, the press contact terminals are previously attached to an upper case and a lower case of an electric connection box and / or an insulating plate provided between the upper case and the lower case. An electric wire is press-fitted into the press-contact terminal and press-connected.
(Japanese Utility Model Laid-Open No. 3-120627, Japanese Unexamined Patent Application Publication No. 6-9682)
No. 0, Japanese Utility Model Laid-open No. 1-166419, etc.)

[0004] As described above, when the electric wire and the press contact terminal are used as the internal circuit of the electric junction box,
Conventionally, the operation of press-fitting and connecting an electric wire to a press-fit terminal previously attached to a case and an insulating plate is performed as shown in FIG.
This is performed by using a wiring mold shown in FIG. That is, a wiring die 5 having a groove formed along the wiring pattern of the electric wire is provided, and the electric wire 2 is inserted into the groove 6 of the wiring die 5 while being sent out from the electric wire sending device 7 by the head roller 8. ing. At this time, since the wire 2 has a certain degree of rigidity and a strong winding, the depth of the groove 6 is set to be at least twice as large as the diameter of the wire 2 so that the wire 2 does not rise inside the groove 6. Thus, the electric wire 2 can be securely held inside the groove 6. After laying the electric wire 2 in the mold 5 as described above, a case (upper case, lower case) or an insulating plate to which a press contact terminal has been attached in advance is set in the mold 5, and the wire 2 is pressed by the press contact terminal. Thereafter, the extrusion pin is projected from the bottom surface of the mold, and the case to which the press contact terminal and the electric wire are attached is extruded from the mold.

[0005]

As described above, when the internal circuit of the electric connection box is formed by the electric wires and the crimping terminals, the electric wires need to be laid in a required pattern and a wiring die is required. In addition, it is necessary to prepare a large number of wiring dies in accordance with differences in wiring patterns. In addition, there is a need for a step of transferring the electric wire laid in the mold to the press-connecting terminal attached to the case or the insulating plate, which causes a problem that both cost and labor are increased.

[0006] When a press contact terminal is attached to the upper case or the lower case, and wires are connected to the inner surface of the case and connected to the press contact terminal at the same time, a connector portion is protrudingly provided on the outer surface of the upper case and the lower case, so that irregularities are formed. Therefore, there is a problem that the connection of the electric wire to the wiring and the press contact terminal cannot be stably performed. In addition, since the press-fitting of the wire to the press-fitting terminal previously attached to the case and the assembling of the cases are performed at the same time, there is a problem that the quality of the press-fitting condition between the wire and the press-fitting terminal cannot be confirmed.

The present invention has been made in view of the above-mentioned various problems. When the internal circuit of an electric connection box is constituted by a circuit composed of electric wires and press-connecting terminals, the electric wires can be efficiently used without taking up space for press-connecting. Wiring can be done well, and the conventionally required wiring mold is not required, and the quality of the press-contact state between the press-connecting terminal and the electric wire can be confirmed. In addition, the press-connecting terminal can be easily and reliably positioned and fixed. The purpose is to be able to do.

[0008]

According to the present invention, in order to achieve the above object, according to the present invention, an insulating plate attached to the inside of a case of an electric connection box is provided with a wiring groove according to a wiring pattern. A press contact terminal driving portion having a large groove width is provided at a required position of the wiring groove, and an electric wire is inserted through the wiring groove and the press contact terminal driving portion, while a conductive metal plate is provided. On the other side, a wire press-contact portion having a slot for cutting the insulating coating of the wire and contacting the core wire is provided, and on the other side, an input / output terminal portion protruding from the wiring groove is provided, and both sides of the slot are provided. A press contact terminal provided with a notch portion from the outer edge of the pair of locking portions, the press contact terminal driven into the wire of the press terminal driving portion,
There is provided an electric connection box provided with a pressure contact terminal in which the pair of locking portions are widened and the edges of the notch portion bite into and lock both wall surfaces of the pressure contact terminal driving portion.

It is preferable that positioning ribs project from both ends of the upper end of the locking portion, and the positioning ribs are locked in positioning grooves formed on both ends of the pressing terminal driving portion. Item 2).

[0010]

In the electric junction box provided with the press-connecting terminal having the above structure,
At the time of wire pressure welding, the locking portions on both sides of the slot that fits into the wire so as to push off the insulating coating of the wire spread outward, but since the locking portion is provided with a cut portion, the spread cut portion has The edges are engaged so as to cut into both side walls of the terminal driving portion of the insulating plate for laying the electric wire. Therefore, the press contact terminal can be securely held so as not to be easily detached from the insulating plate.

In addition, when the positioning terminal is provided and the positioning rib is provided, the pressing terminal fixed to the attached member can be positioned and fixed at a predetermined position.

Further, the electric wire is directly inserted into the wiring groove formed in the insulating plate, and then the press contact terminal is press-fitted into the press contact terminal driving portion.
Press the insulation displacement terminal and the electric wire. At this time, the cutouts provided on both sides of the wire pressure contact portion of the press contact terminal bite into the side wall of the wiring groove, and the press contact terminal is firmly held by the press contact terminal driving portion. In this state, since the case is not attached to the insulating plate, it is possible to confirm the quality of the press contact state between the electric wire and the press contact terminal.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. FIGS. 1 to 6 show an electric connection box of the present invention. As shown in FIG. 1, the electric connection box has a single thick insulating plate 1 inside an upper case 10 and a lower case 11.
2 is sandwiched. First and second wiring grooves 13 and 14 for inserting and holding electric wires are provided on both upper and lower surfaces of the insulating plate 12 in accordance with a wiring pattern, and a thin electric wire 15 and a thick electric wire are provided inside these wiring grooves 13 and 14. 16 in FIG.
Is inserted directly by the wire feeder 7 shown in FIG. With respect to the electric wires 15 and 16 held inside the wiring grooves 13 and 14, the press contact portions 17d and 1d at one ends of the press contact terminals 17 and 18 are provided.
8d are press-fitted and connected by pressure.
Terminal holes 1 formed in the outer walls of the upper case 10 and the lower case 11 with the input / output terminal portions 17b and 18b at the other end of the
It protrudes from 9 and 20.

More specifically, as shown in FIG. 2, the upper case 10 is provided with a step in the upper wall portion 10a at the lower end surface opening.
The fuse fitting part 21 on the power supply side is formed one step higher, and the connector part 22 for fitting a connector (not shown) connected to the electric wire on the load side is formed at a lower position. Each of the terminal holes 19 is formed in an inner surface surrounded by a peripheral wall 22. On the other hand, the lower case 11 is an opening at the upper end surface,
A connector portion 23 for fitting a connector connected to the load side electric wire is protruded, and the terminal hole 20 is formed in an inner surface surrounded by a peripheral wall of the connector portion 23. The distal end surfaces of the outer peripheral walls 10b, 11b of the upper case 10 and the lower case 11 are in contact with each other to form an electric connection box.

As shown in FIG. 1, the insulating plate 12 is formed into a shape which can be closely fitted to an internal space formed when the upper case 10 and the lower case 11 are in contact with each other. That is, the insulating plate 12 is provided on the upper wall 10 a of the upper case 10.
A step-like protruding portion 12a is provided in a portion sandwiched between the fuse fitting portion 21 and the lower case 11, which is one step higher, and this portion is made thicker than other portions.

As shown in FIGS. 4B, 5 and 6, a first wiring groove 13 is provided on the lower surface 12b of the insulating plate 12 in contact with the inner surface of the lower case 11, corresponding to the wiring pattern. ing. The wiring groove 13 is for inserting a small electric wire through which a small current flows. As shown in FIG. 5, the relationship between the diameter W1 of the thin electric wire 15 and the width W2 of the first wiring groove 13 is set to W1 ≧ W2. ,
In addition, the relationship between the depth H1 of the first wiring groove 13 and the wire diameter W1 is set to H1 ≧ 2W1. Note that the depth H1 of the wiring groove 13 is not limited to the above relationship, and may be larger than the wire diameter W1, but is preferably twice or more as described above.

The electric wire 15 inserted into the wiring groove 13
In a portion where the wiring groove 13 is connected to the pressure contact terminal 17, both side walls 13a and 13b of the wiring groove 13 are widened to form a pressure terminal driving portion 24 having a lower surface opening having a wiring groove width of W3. The depth H2 of the press contact terminal driving portion 24 is set to be larger than the depth H1 of the wiring groove 13. On the lower surface 12b side of the press-contact terminal driving portion 24, the wide portions 24a and 24b are formed by further increasing the interval between the side walls 13a and 13b. Further, as shown in FIG. 4A, a part of the first wiring groove 13 penetrates from the bottom surface to the upper surface 12c of the insulating plate 12, and is formed with a press-contact terminal driving portion 25 having an upper surface opening. I have. The press contact terminal driving portion 25 does not extend to the lower surface 12 b of the insulating plate 12, but extends from the upper surface 12 c to an intermediate portion between the side walls 13 a and 13 b of the wiring groove 13. Further, on the upper surface 12c side of the press-contact terminal driving portion 25, wide portions 25a and 25b are provided in which the distance between the side walls 13a and 13b is further widened. The press contact terminal driving portion 24 is provided at a position corresponding to the terminal hole 20 of the lower case 11, and the press contact terminal driving portion 25 is provided at a position corresponding to the terminal hole 19 of the upper case 10.

As shown in FIGS. 4A, 5 and 6, a wiring pattern for connecting to the fuse is formed on the upper surface of the step-like projection 12a of the insulating plate 12 corresponding to the fuse fitting portion 21. The second wiring groove 14 is provided correspondingly. The second wiring groove 14 is for inserting a thick electric wire through which a large current flows, has a width W4 larger than that of the first wiring groove 13 for inserting a thin electric wire, and has a second wiring groove 14 having a depth H3. It is deeper than one wiring groove 13. Thick electric wire 1 inserted into the second wiring groove 14
6 and the press contact terminal 18 are connected to each other in the second wiring groove 1.
4 is provided with a press-contact terminal driving portion 26 in which the distance between the side walls 14a and 14b is widened to have a width W5. Further, on the upper surface side of the press-contact terminal driving portion 26, wide portions 26a and 26b in which the interval between the side walls 14a and 14b is further widened are provided. The first wiring groove 13 is provided on the lower surface side of the step-shaped protrusion 12a of the insulating plate 12, and therefore, the second wiring groove 14 and the first wiring groove 13 are provided on both upper and lower surfaces of the step-shaped protrusion 12a. ing.

A press-contact terminal 17 press-contacting the thin wire 15
Is made of a conductive metal plate, and has a male input / output terminal portion 17b on one side of a rectangular plate-like base portion 17a as shown in FIGS. Also, the base 17 of the press contact terminal 17
The other side of the slot 17a is provided with a slot 17c at the center and is branched into two forks.
An electric wire pressure contact portion 17d provided with j and 17k is provided. The width of the wire pressure contact portion 17d is set to the same width W3 as the pressure contact terminal driving portion 24. A pair of rectangular positioning ribs 17e and 17f projecting from both sides of the base 17a are provided on the output terminal 17b side of the base 17a. Further, a pair of locking portions 17j and 17k on both sides of the slot 17c are provided with triangular cuts 17 from the outer edge.
g and 17h are provided. The notches 17g and 17h are:
As shown in FIG. 6, the press contact terminal 17 is
In the state of being press-fitted, below the center O1 of the electric wire 15,
That is, it is provided so as to be located on the bottom side of the first wiring groove 13.

A press contact terminal 18 for press contact with the thick electric wire 16
Also has the same shape as the press contact terminal 17 that presses against the thin object wire 15, and has output terminal portions 18b on both sides of the base 18a.
A slot 18c is provided in the center and the wire is branched into two branches. An electric wire pressure contact portion 18d having a pair of locking portions 18j and 18k is provided on both sides of the slot 18c.
8e, 18f and notches 18g, 18h.
Further, as shown in FIG. 6, in a state where the press contact terminal 18 is pressed into the press contact terminal driving portion 26, the cut portions 18 g and 18 h are located below the center O 2 of the electric wire 16, that is, the second wiring groove 14.
Located on the bottom side of the. Further, the width of the wire press contact portion 18d of the press contact terminal 18 is the same as the width W5 of the press contact terminal driving portion 26.
Is set to The wire press contact portions 17a, 18a of the press contact terminals 17, 18 are connected to the press contact terminal driving portions 24, 25, 2,
6 to be pressed into.

Next, a method of assembling the electric junction box comprising the above members will be described. First, with the lower surface of the insulating plate 12 facing upward, the thin wire 15 is fed into the first wiring groove 13 by using a wire feeder and directly inserted. At this time, the depth H1 of the first wiring groove 13 is more than twice as deep as the electric wire 15,
Moreover, the width W2 of the first wiring groove 13 is changed to the diameter W1 of the electric wire 15.
Because the wire is press-fitted with a slightly smaller setting,
Even if the wire 15 inserted into the first wiring groove 13 has a bend, the wire 15 can be reliably held without being lifted from the first wiring groove 13.

Next, with the upper surface of the insulating plate 12 facing upward, the thick electric wire 16 is sent out and inserted directly into the second wiring groove 14 using an electric wire feeder. Also in the case of the thick electric wire 16, since the depth of the second wiring groove 14 is increased and the width of the wiring groove is reduced and the electric wire is press-fitted, the thick electric wire 16 rises from the second wiring groove 14. Can be inserted and held without the need.
Further, when the wires 15 and 16 are inserted into the wiring grooves 13 and 14, the wires 15 and 16 can be inserted in a stable state because the insulating plate 12 has few irregularities.

Next, the press contact terminal 17 is pressed into the press contact terminal driving portion 24 with the lower surface 12b of the insulating plate 12 facing upward. When the wire press-contact portion 17d of the press-contact terminal 17 is press-fitted into the press-contact terminal driving portion 24, the thin wire 15 is inserted into the slot 17c.
Is pushed in, and the wire press contact portion 17d breaks through the insulating coating 15a of the thin wire 15 and comes into contact with the core wire 15b. At this time, as the thin electric wire 15 is pushed into the slot 17c, the electric wire press contact portion 17d tends to expand outward as shown by an arrow A in FIG. 6, but as described above, the press contact terminal driving portion 24 and the electric wire Since the width of the press contact portion 17d is the same width W3, the edge portions 17i of the cut portions 17g and 17h are
dig into a, 13b. Therefore, the press contact terminal 17 is firmly held in a state where the press contact terminal 17 is pressed into the press contact terminal driving portion 24. Further, the pair of positioning ribs 17e and 17f provided on the base 17a of the press contact terminal 17 are accommodated in the wide portions 24a and 24b, so that the position of the press contact terminal 17 in the press-fit direction is securely held. As described above, in the present embodiment, the press contact terminal 17 is attached to the insulating plate 12 at the same time as the press contact terminal 17 is electrically connected to the electric wire 15.

Similarly, with the upper surface 12c of the insulating plate 12 facing upward, the press contact terminal 18 is pressed into the press contact terminal driving portion 26,
At the same time as connecting the insulation displacement terminal 18 to the thick wire 16,
8 is attached to the insulating plate 12. Again, slot 1
As the thick wire 16 is pushed into the wire 8c, the wire pressure contact portion 18d tries to expand as shown by an arrow A in FIG. 6, and the edge portions 18i of the cut portions 18g and 18h are connected to the side walls 14a and 1b.
Dig into 4b. Therefore, the press contact terminal 18 is firmly held in a state where it is pressed into the press contact terminal driving portion 26. Further, since the positioning ribs 18e and 18f of the press contact terminal 18 are accommodated in the wide portions 26a and 26b, the position of the press contact terminal 18 in the press-fitting direction is securely held.

As described above, the wiring grooves 13, 1 of the insulating plate 12 are provided.
4 against the electric wires 15 and 16 wired to
The upper case 10 and the lower case 11 are connected to the upper and lower surfaces of the insulating plate 12 by pressing the upper and lower surfaces of the upper and lower surfaces, respectively.
Is not attached, it is possible to confirm whether the electric wires 16 and 15 are in a press-fitted state.

Next, the upper case 10 and the lower case 11 are assembled with the insulating plate 12 interposed therebetween. At this time,
Terminal hole 19 of fuse fitting portion 21 of upper case 10
Of the press contact terminal 18 connected to the thick wire 16 and the input / output terminal portion 17b of the press contact terminal 17 connected to the thin wire 15 from the terminal hole 19 of the connector portion 22. Further, the input / output terminal portion 17b of the press contact terminal 17 connected to the thin object wire 15 is projected from the terminal hole 20 of the connector portion 23 of the lower case 11.

In the electric junction box assembled as described above, the internal circuits are all thin wires 15 and thick wires 16.
And press-connecting wires 17 and 18 connected to them. That is, the power supply circuit side is constituted by the thick electric wire 16 and the press contact terminal 18 press-connected to the thick electric wire 16, and the terminal portion 18 b of the press contact terminal 18 is attached to the fuse fitting portion 21 by the fuse 30 (FIG. A)). On the other hand, the load-side circuit includes a thin object wire 15 and a press-contact terminal 17 that is press-connected to the thin object wire 15, and a terminal portion 17 b of the press-contact terminal 17 is connected to the connector portion 22 or 23 on the load side. Connected to connector (not shown).

As described above, if the electric connection box is constituted entirely of electric wires and press-connecting terminals without using a bus bar in the internal circuit,
It can easily respond to circuit changes. In other words, when a change occurs in the circuit for small current, in which the circuit is particularly frequently changed, it is possible to easily cope with the change by changing the wiring of the thin electric wire 15 or changing the mounting position of the press contact terminal 17.
Further, when a change occurs in the large current circuit, it can be easily handled by changing the wiring of the thick electric wire 16 or changing the mounting position of the press contact terminal 18.

[0029]

[0030]

As is apparent from the above description, according to the present invention, since the notches are provided in the locking portions on both sides of the slot of the press contact terminal, the locking portion spreads out when the wire is pressed. Then, the edge of the cut portion cuts into both side walls of the press contact terminal driving portion of the insulating plate. Therefore, the press contact terminal is securely fixed to the insulating plate. As a result, even if the dimensional accuracy of the press contact terminal and the dimensional accuracy of the groove into which the press contact terminal is inserted are slightly reduced,
Can be fixed firmly. Moreover, just press in the insulation displacement terminal,
Alternatively, the press-connecting terminal and the insulating plate can be fixed only by press-fitting operation of merely press-fitting the electric wire into the press-connecting terminal.

In the second aspect of the present invention, since the positioning terminal is provided with the positioning ribs, the pressing terminal can be positioned and held at a predetermined position when the pressing terminal is driven. Position accuracy is improved. As a result, the position of the input / output terminal on the other side can be reliably adjusted to the predetermined position.

Further, in the electric junction box of the present invention, since the electric wires are arranged in the wiring grooves provided in the insulating plate, the electric wires can be efficiently laid without taking up space, and furthermore, the electric connection box which has been conventionally required. No wiring mold is required. Also,
Press-fit the press-fit terminal into the press-fit terminal driving section of the wiring groove of the insulating plate,
The press contact between the press contact terminal and the electric wire and the fixation between the press contact terminal and the insulating plate can be performed at the same time, and the number of working steps can be reduced. Furthermore, in this state, since the case is not attached to the insulating plate, it is possible to easily confirm the quality of the press-contact state between the electric wire and the press-contact terminal.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an electric junction box of the present invention.

FIGS. 2A and 2B show an upper case constituting the electric junction box, wherein FIG. 2A is a plan view and FIG. 2B is a perspective view.

FIG. 3 is a bottom view showing a lower case constituting the electric connection box;

4A and 4B show an insulating plate constituting an electric junction box, wherein FIG. 4A is a plan view and FIG. 4B is a bottom view.

FIG. 5 is a cross-sectional view showing a relationship between an insulating plate, an electric wire, and a press contact terminal.

FIG. 6 is a cross-sectional view showing a state where the electric wires and the press contact terminals are inserted into the insulating plate.

FIG. 7 is a perspective view showing a press contact terminal.

8 (A) and 8 (B) are schematic views showing a conventional method of wiring an electric wire which is press-contacted with a press-connecting terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Upper case 11 Lower case 12 Insulating plate 12a Step-shaped protruding part 12b Lower surface (one surface) 13 First wiring groove 14 Second wiring groove 15 Thin electric wire 16 Thick electric wire 17, 18 Pressure contact terminal 17a, 18a Wire pressure contact portion 17b, 18b Input / output terminal portion 19, 20 Terminal hole 24, 25, 26 Pressure contact terminal driving portion W2 Width of first wiring groove W4 Width of second wiring groove

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Seimi Kobayashi 1-14 Nishisuehirocho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd. (72) Inventor Nori Inoue 1-114 Nishisuehirocho, Yokkaichi-shi, Mie Sumitomo Wiring Systems (56) References JP-A-5-343110 (JP, A) JP-A-4-172908 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01R 4/24 H02G 3/16

Claims (2)

(57) [Claims] (1)Installed inside the electrical junction box case
Wiring grooves are provided on the insulating plate according to the wiring pattern.
Press-fit end with a large groove width at the required position of the wiring groove
A child driving part is provided,The wire is inserted through the wiring groove and the crimp terminal
While It is made of conductive metal plate.
Wire crimping section with a slot
Input / output that protrudes from the wiring groove on the other side
A terminal portion is provided, and a pair of engaging members on both sides of the slot are provided.
Equipped with a pressure contact terminal provided with a notch from the outer edge of the stop ,The crimping terminal driven into the wire of the crimping terminal driving portion
The edge of the notch part is the above
Press-fitting that bites into both walls of the press-fitting terminal driving section
Electrical junction box with terminals . 2. A positioning rib protrudes from both sides of an upper end of the locking portion, and is provided on both sides of a tip end of the press contact terminal driving portion.
The positioning rib is locked in the positioning groove
An electric connection box provided with the insulation displacement terminal according to claim 1 .